golang-fave/engine/assets/cp.codemirror.js

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

// This is CodeMirror (https://codemirror.net), a code editor
// implemented in JavaScript on top of the browser's DOM.
//
// You can find some technical background for some of the code below
// at http://marijnhaverbeke.nl/blog/#cm-internals .

(function (global, factory) {
	typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
	typeof define === 'function' && define.amd ? define(factory) :
	(global.CodeMirror = factory());
}(this, (function () { 'use strict';

	// Kludges for bugs and behavior differences that can't be feature
	// detected are enabled based on userAgent etc sniffing.
	var userAgent = navigator.userAgent;
	var platform = navigator.platform;

	var gecko = /gecko\/\d/i.test(userAgent);
	var ie_upto10 = /MSIE \d/.test(userAgent);
	var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
	var edge = /Edge\/(\d+)/.exec(userAgent);
	var ie = ie_upto10 || ie_11up || edge;
	var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
	var webkit = !edge && /WebKit\//.test(userAgent);
	var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
	var chrome = !edge && /Chrome\//.test(userAgent);
	var presto = /Opera\//.test(userAgent);
	var safari = /Apple Computer/.test(navigator.vendor);
	var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
	var phantom = /PhantomJS/.test(userAgent);

	var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
	var android = /Android/.test(userAgent);
	// This is woefully incomplete. Suggestions for alternative methods welcome.
	var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
	var mac = ios || /Mac/.test(platform);
	var chromeOS = /\bCrOS\b/.test(userAgent);
	var windows = /win/i.test(platform);

	var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
	if (presto_version) { presto_version = Number(presto_version[1]); }
	if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
	// Some browsers use the wrong event properties to signal cmd/ctrl on OS X
	var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
	var captureRightClick = gecko || (ie && ie_version >= 9);

	function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }

	var rmClass = function(node, cls) {
		var current = node.className;
		var match = classTest(cls).exec(current);
		if (match) {
			var after = current.slice(match.index + match[0].length);
			node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
		}
	};

	function removeChildren(e) {
		for (var count = e.childNodes.length; count > 0; --count)
			{ e.removeChild(e.firstChild); }
		return e
	}

	function removeChildrenAndAdd(parent, e) {
		return removeChildren(parent).appendChild(e)
	}

	function elt(tag, content, className, style) {
		var e = document.createElement(tag);
		if (className) { e.className = className; }
		if (style) { e.style.cssText = style; }
		if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
		else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
		return e
	}
	// wrapper for elt, which removes the elt from the accessibility tree
	function eltP(tag, content, className, style) {
		var e = elt(tag, content, className, style);
		e.setAttribute("role", "presentation");
		return e
	}

	var range;
	if (document.createRange) { range = function(node, start, end, endNode) {
		var r = document.createRange();
		r.setEnd(endNode || node, end);
		r.setStart(node, start);
		return r
	}; }
	else { range = function(node, start, end) {
		var r = document.body.createTextRange();
		try { r.moveToElementText(node.parentNode); }
		catch(e) { return r }
		r.collapse(true);
		r.moveEnd("character", end);
		r.moveStart("character", start);
		return r
	}; }

	function contains(parent, child) {
		if (child.nodeType == 3) // Android browser always returns false when child is a textnode
			{ child = child.parentNode; }
		if (parent.contains)
			{ return parent.contains(child) }
		do {
			if (child.nodeType == 11) { child = child.host; }
			if (child == parent) { return true }
		} while (child = child.parentNode)
	}

	function activeElt() {
		// IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
		// IE < 10 will throw when accessed while the page is loading or in an iframe.
		// IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
		var activeElement;
		try {
			activeElement = document.activeElement;
		} catch(e) {
			activeElement = document.body || null;
		}
		while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
			{ activeElement = activeElement.shadowRoot.activeElement; }
		return activeElement
	}

	function addClass(node, cls) {
		var current = node.className;
		if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
	}
	function joinClasses(a, b) {
		var as = a.split(" ");
		for (var i = 0; i < as.length; i++)
			{ if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
		return b
	}

	var selectInput = function(node) { node.select(); };
	if (ios) // Mobile Safari apparently has a bug where select() is broken.
		{ selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
	else if (ie) // Suppress mysterious IE10 errors
		{ selectInput = function(node) { try { node.select(); } catch(_e) {} }; }

	function bind(f) {
		var args = Array.prototype.slice.call(arguments, 1);
		return function(){return f.apply(null, args)}
	}

	function copyObj(obj, target, overwrite) {
		if (!target) { target = {}; }
		for (var prop in obj)
			{ if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
				{ target[prop] = obj[prop]; } }
		return target
	}

	// Counts the column offset in a string, taking tabs into account.
	// Used mostly to find indentation.
	function countColumn(string, end, tabSize, startIndex, startValue) {
		if (end == null) {
			end = string.search(/[^\s\u00a0]/);
			if (end == -1) { end = string.length; }
		}
		for (var i = startIndex || 0, n = startValue || 0;;) {
			var nextTab = string.indexOf("\t", i);
			if (nextTab < 0 || nextTab >= end)
				{ return n + (end - i) }
			n += nextTab - i;
			n += tabSize - (n % tabSize);
			i = nextTab + 1;
		}
	}

	var Delayed = function() {this.id = null;};
	Delayed.prototype.set = function (ms, f) {
		clearTimeout(this.id);
		this.id = setTimeout(f, ms);
	};

	function indexOf(array, elt) {
		for (var i = 0; i < array.length; ++i)
			{ if (array[i] == elt) { return i } }
		return -1
	}

	// Number of pixels added to scroller and sizer to hide scrollbar
	var scrollerGap = 30;

	// Returned or thrown by various protocols to signal 'I'm not
	// handling this'.
	var Pass = {toString: function(){return "CodeMirror.Pass"}};

	// Reused option objects for setSelection & friends
	var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};

	// The inverse of countColumn -- find the offset that corresponds to
	// a particular column.
	function findColumn(string, goal, tabSize) {
		for (var pos = 0, col = 0;;) {
			var nextTab = string.indexOf("\t", pos);
			if (nextTab == -1) { nextTab = string.length; }
			var skipped = nextTab - pos;
			if (nextTab == string.length || col + skipped >= goal)
				{ return pos + Math.min(skipped, goal - col) }
			col += nextTab - pos;
			col += tabSize - (col % tabSize);
			pos = nextTab + 1;
			if (col >= goal) { return pos }
		}
	}

	var spaceStrs = [""];
	function spaceStr(n) {
		while (spaceStrs.length <= n)
			{ spaceStrs.push(lst(spaceStrs) + " "); }
		return spaceStrs[n]
	}

	function lst(arr) { return arr[arr.length-1] }

	function map(array, f) {
		var out = [];
		for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
		return out
	}

	function insertSorted(array, value, score) {
		var pos = 0, priority = score(value);
		while (pos < array.length && score(array[pos]) <= priority) { pos++; }
		array.splice(pos, 0, value);
	}

	function nothing() {}

	function createObj(base, props) {
		var inst;
		if (Object.create) {
			inst = Object.create(base);
		} else {
			nothing.prototype = base;
			inst = new nothing();
		}
		if (props) { copyObj(props, inst); }
		return inst
	}

	var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
	function isWordCharBasic(ch) {
		return /\w/.test(ch) || ch > "\x80" &&
			(ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
	}
	function isWordChar(ch, helper) {
		if (!helper) { return isWordCharBasic(ch) }
		if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
		return helper.test(ch)
	}

	function isEmpty(obj) {
		for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
		return true
	}

	// Extending unicode characters. A series of a non-extending char +
	// any number of extending chars is treated as a single unit as far
	// as editing and measuring is concerned. This is not fully correct,
	// since some scripts/fonts/browsers also treat other configurations
	// of code points as a group.
	var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/;
	function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }

	// Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
	function skipExtendingChars(str, pos, dir) {
		while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
		return pos
	}

	// Returns the value from the range [`from`; `to`] that satisfies
	// `pred` and is closest to `from`. Assumes that at least `to`
	// satisfies `pred`. Supports `from` being greater than `to`.
	function findFirst(pred, from, to) {
		// At any point we are certain `to` satisfies `pred`, don't know
		// whether `from` does.
		var dir = from > to ? -1 : 1;
		for (;;) {
			if (from == to) { return from }
			var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
			if (mid == from) { return pred(mid) ? from : to }
			if (pred(mid)) { to = mid; }
			else { from = mid + dir; }
		}
	}

	// BIDI HELPERS

	function iterateBidiSections(order, from, to, f) {
		if (!order) { return f(from, to, "ltr", 0) }
		var found = false;
		for (var i = 0; i < order.length; ++i) {
			var part = order[i];
			if (part.from < to && part.to > from || from == to && part.to == from) {
				f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
				found = true;
			}
		}
		if (!found) { f(from, to, "ltr"); }
	}

	var bidiOther = null;
	function getBidiPartAt(order, ch, sticky) {
		var found;
		bidiOther = null;
		for (var i = 0; i < order.length; ++i) {
			var cur = order[i];
			if (cur.from < ch && cur.to > ch) { return i }
			if (cur.to == ch) {
				if (cur.from != cur.to && sticky == "before") { found = i; }
				else { bidiOther = i; }
			}
			if (cur.from == ch) {
				if (cur.from != cur.to && sticky != "before") { found = i; }
				else { bidiOther = i; }
			}
		}
		return found != null ? found : bidiOther
	}

	// Bidirectional ordering algorithm
	// See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
	// that this (partially) implements.

	// One-char codes used for character types:
	// L (L):   Left-to-Right
	// R (R):   Right-to-Left
	// r (AL):  Right-to-Left Arabic
	// 1 (EN):  European Number
	// + (ES):  European Number Separator
	// % (ET):  European Number Terminator
	// n (AN):  Arabic Number
	// , (CS):  Common Number Separator
	// m (NSM): Non-Spacing Mark
	// b (BN):  Boundary Neutral
	// s (B):   Paragraph Separator
	// t (S):   Segment Separator
	// w (WS):  Whitespace
	// N (ON):  Other Neutrals

	// Returns null if characters are ordered as they appear
	// (left-to-right), or an array of sections ({from, to, level}
	// objects) in the order in which they occur visually.
	var bidiOrdering = (function() {
		// Character types for codepoints 0 to 0xff
		var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
		// Character types for codepoints 0x600 to 0x6f9
		var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
		function charType(code) {
			if (code <= 0xf7) { return lowTypes.charAt(code) }
			else if (0x590 <= code && code <= 0x5f4) { return "R" }
			else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
			else if (0x6ee <= code && code <= 0x8ac) { return "r" }
			else if (0x2000 <= code && code <= 0x200b) { return "w" }
			else if (code == 0x200c) { return "b" }
			else { return "L" }
		}

		var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
		var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;

		function BidiSpan(level, from, to) {
			this.level = level;
			this.from = from; this.to = to;
		}

		return function(str, direction) {
			var outerType = direction == "ltr" ? "L" : "R";

			if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
			var len = str.length, types = [];
			for (var i = 0; i < len; ++i)
				{ types.push(charType(str.charCodeAt(i))); }

			// W1. Examine each non-spacing mark (NSM) in the level run, and
			// change the type of the NSM to the type of the previous
			// character. If the NSM is at the start of the level run, it will
			// get the type of sor.
			for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
				var type = types[i$1];
				if (type == "m") { types[i$1] = prev; }
				else { prev = type; }
			}

			// W2. Search backwards from each instance of a European number
			// until the first strong type (R, L, AL, or sor) is found. If an
			// AL is found, change the type of the European number to Arabic
			// number.
			// W3. Change all ALs to R.
			for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
				var type$1 = types[i$2];
				if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
				else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
			}

			// W4. A single European separator between two European numbers
			// changes to a European number. A single common separator between
			// two numbers of the same type changes to that type.
			for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
				var type$2 = types[i$3];
				if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
				else if (type$2 == "," && prev$1 == types[i$3+1] &&
								 (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
				prev$1 = type$2;
			}

			// W5. A sequence of European terminators adjacent to European
			// numbers changes to all European numbers.
			// W6. Otherwise, separators and terminators change to Other
			// Neutral.
			for (var i$4 = 0; i$4 < len; ++i$4) {
				var type$3 = types[i$4];
				if (type$3 == ",") { types[i$4] = "N"; }
				else if (type$3 == "%") {
					var end = (void 0);
					for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
					var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
					for (var j = i$4; j < end; ++j) { types[j] = replace; }
					i$4 = end - 1;
				}
			}

			// W7. Search backwards from each instance of a European number
			// until the first strong type (R, L, or sor) is found. If an L is
			// found, then change the type of the European number to L.
			for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
				var type$4 = types[i$5];
				if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
				else if (isStrong.test(type$4)) { cur$1 = type$4; }
			}

			// N1. A sequence of neutrals takes the direction of the
			// surrounding strong text if the text on both sides has the same
			// direction. European and Arabic numbers act as if they were R in
			// terms of their influence on neutrals. Start-of-level-run (sor)
			// and end-of-level-run (eor) are used at level run boundaries.
			// N2. Any remaining neutrals take the embedding direction.
			for (var i$6 = 0; i$6 < len; ++i$6) {
				if (isNeutral.test(types[i$6])) {
					var end$1 = (void 0);
					for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
					var before = (i$6 ? types[i$6-1] : outerType) == "L";
					var after = (end$1 < len ? types[end$1] : outerType) == "L";
					var replace$1 = before == after ? (before ? "L" : "R") : outerType;
					for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
					i$6 = end$1 - 1;
				}
			}

			// Here we depart from the documented algorithm, in order to avoid
			// building up an actual levels array. Since there are only three
			// levels (0, 1, 2) in an implementation that doesn't take
			// explicit embedding into account, we can build up the order on
			// the fly, without following the level-based algorithm.
			var order = [], m;
			for (var i$7 = 0; i$7 < len;) {
				if (countsAsLeft.test(types[i$7])) {
					var start = i$7;
					for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
					order.push(new BidiSpan(0, start, i$7));
				} else {
					var pos = i$7, at = order.length;
					for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
					for (var j$2 = pos; j$2 < i$7;) {
						if (countsAsNum.test(types[j$2])) {
							if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); }
							var nstart = j$2;
							for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
							order.splice(at, 0, new BidiSpan(2, nstart, j$2));
							pos = j$2;
						} else { ++j$2; }
					}
					if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
				}
			}
			if (direction == "ltr") {
				if (order[0].level == 1 && (m = str.match(/^\s+/))) {
					order[0].from = m[0].length;
					order.unshift(new BidiSpan(0, 0, m[0].length));
				}
				if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
					lst(order).to -= m[0].length;
					order.push(new BidiSpan(0, len - m[0].length, len));
				}
			}

			return direction == "rtl" ? order.reverse() : order
		}
	})();

	// Get the bidi ordering for the given line (and cache it). Returns
	// false for lines that are fully left-to-right, and an array of
	// BidiSpan objects otherwise.
	function getOrder(line, direction) {
		var order = line.order;
		if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
		return order
	}

	// EVENT HANDLING

	// Lightweight event framework. on/off also work on DOM nodes,
	// registering native DOM handlers.

	var noHandlers = [];

	var on = function(emitter, type, f) {
		if (emitter.addEventListener) {
			emitter.addEventListener(type, f, false);
		} else if (emitter.attachEvent) {
			emitter.attachEvent("on" + type, f);
		} else {
			var map$$1 = emitter._handlers || (emitter._handlers = {});
			map$$1[type] = (map$$1[type] || noHandlers).concat(f);
		}
	};

	function getHandlers(emitter, type) {
		return emitter._handlers && emitter._handlers[type] || noHandlers
	}

	function off(emitter, type, f) {
		if (emitter.removeEventListener) {
			emitter.removeEventListener(type, f, false);
		} else if (emitter.detachEvent) {
			emitter.detachEvent("on" + type, f);
		} else {
			var map$$1 = emitter._handlers, arr = map$$1 && map$$1[type];
			if (arr) {
				var index = indexOf(arr, f);
				if (index > -1)
					{ map$$1[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
			}
		}
	}

	function signal(emitter, type /*, values...*/) {
		var handlers = getHandlers(emitter, type);
		if (!handlers.length) { return }
		var args = Array.prototype.slice.call(arguments, 2);
		for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
	}

	// The DOM events that CodeMirror handles can be overridden by
	// registering a (non-DOM) handler on the editor for the event name,
	// and preventDefault-ing the event in that handler.
	function signalDOMEvent(cm, e, override) {
		if (typeof e == "string")
			{ e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
		signal(cm, override || e.type, cm, e);
		return e_defaultPrevented(e) || e.codemirrorIgnore
	}

	function signalCursorActivity(cm) {
		var arr = cm._handlers && cm._handlers.cursorActivity;
		if (!arr) { return }
		var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
		for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
			{ set.push(arr[i]); } }
	}

	function hasHandler(emitter, type) {
		return getHandlers(emitter, type).length > 0
	}

	// Add on and off methods to a constructor's prototype, to make
	// registering events on such objects more convenient.
	function eventMixin(ctor) {
		ctor.prototype.on = function(type, f) {on(this, type, f);};
		ctor.prototype.off = function(type, f) {off(this, type, f);};
	}

	// Due to the fact that we still support jurassic IE versions, some
	// compatibility wrappers are needed.

	function e_preventDefault(e) {
		if (e.preventDefault) { e.preventDefault(); }
		else { e.returnValue = false; }
	}
	function e_stopPropagation(e) {
		if (e.stopPropagation) { e.stopPropagation(); }
		else { e.cancelBubble = true; }
	}
	function e_defaultPrevented(e) {
		return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
	}
	function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}

	function e_target(e) {return e.target || e.srcElement}
	function e_button(e) {
		var b = e.which;
		if (b == null) {
			if (e.button & 1) { b = 1; }
			else if (e.button & 2) { b = 3; }
			else if (e.button & 4) { b = 2; }
		}
		if (mac && e.ctrlKey && b == 1) { b = 3; }
		return b
	}

	// Detect drag-and-drop
	var dragAndDrop = function() {
		// There is *some* kind of drag-and-drop support in IE6-8, but I
		// couldn't get it to work yet.
		if (ie && ie_version < 9) { return false }
		var div = elt('div');
		return "draggable" in div || "dragDrop" in div
	}();

	var zwspSupported;
	function zeroWidthElement(measure) {
		if (zwspSupported == null) {
			var test = elt("span", "\u200b");
			removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
			if (measure.firstChild.offsetHeight != 0)
				{ zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
		}
		var node = zwspSupported ? elt("span", "\u200b") :
			elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
		node.setAttribute("cm-text", "");
		return node
	}

	// Feature-detect IE's crummy client rect reporting for bidi text
	var badBidiRects;
	function hasBadBidiRects(measure) {
		if (badBidiRects != null) { return badBidiRects }
		var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
		var r0 = range(txt, 0, 1).getBoundingClientRect();
		var r1 = range(txt, 1, 2).getBoundingClientRect();
		removeChildren(measure);
		if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
		return badBidiRects = (r1.right - r0.right < 3)
	}

	// See if "".split is the broken IE version, if so, provide an
	// alternative way to split lines.
	var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
		var pos = 0, result = [], l = string.length;
		while (pos <= l) {
			var nl = string.indexOf("\n", pos);
			if (nl == -1) { nl = string.length; }
			var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
			var rt = line.indexOf("\r");
			if (rt != -1) {
				result.push(line.slice(0, rt));
				pos += rt + 1;
			} else {
				result.push(line);
				pos = nl + 1;
			}
		}
		return result
	} : function (string) { return string.split(/\r\n?|\n/); };

	var hasSelection = window.getSelection ? function (te) {
		try { return te.selectionStart != te.selectionEnd }
		catch(e) { return false }
	} : function (te) {
		var range$$1;
		try {range$$1 = te.ownerDocument.selection.createRange();}
		catch(e) {}
		if (!range$$1 || range$$1.parentElement() != te) { return false }
		return range$$1.compareEndPoints("StartToEnd", range$$1) != 0
	};

	var hasCopyEvent = (function () {
		var e = elt("div");
		if ("oncopy" in e) { return true }
		e.setAttribute("oncopy", "return;");
		return typeof e.oncopy == "function"
	})();

	var badZoomedRects = null;
	function hasBadZoomedRects(measure) {
		if (badZoomedRects != null) { return badZoomedRects }
		var node = removeChildrenAndAdd(measure, elt("span", "x"));
		var normal = node.getBoundingClientRect();
		var fromRange = range(node, 0, 1).getBoundingClientRect();
		return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
	}

	// Known modes, by name and by MIME
	var modes = {}, mimeModes = {};

	// Extra arguments are stored as the mode's dependencies, which is
	// used by (legacy) mechanisms like loadmode.js to automatically
	// load a mode. (Preferred mechanism is the require/define calls.)
	function defineMode(name, mode) {
		if (arguments.length > 2)
			{ mode.dependencies = Array.prototype.slice.call(arguments, 2); }
		modes[name] = mode;
	}

	function defineMIME(mime, spec) {
		mimeModes[mime] = spec;
	}

	// Given a MIME type, a {name, ...options} config object, or a name
	// string, return a mode config object.
	function resolveMode(spec) {
		if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
			spec = mimeModes[spec];
		} else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
			var found = mimeModes[spec.name];
			if (typeof found == "string") { found = {name: found}; }
			spec = createObj(found, spec);
			spec.name = found.name;
		} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
			return resolveMode("application/xml")
		} else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
			return resolveMode("application/json")
		}
		if (typeof spec == "string") { return {name: spec} }
		else { return spec || {name: "null"} }
	}

	// Given a mode spec (anything that resolveMode accepts), find and
	// initialize an actual mode object.
	function getMode(options, spec) {
		spec = resolveMode(spec);
		var mfactory = modes[spec.name];
		if (!mfactory) { return getMode(options, "text/plain") }
		var modeObj = mfactory(options, spec);
		if (modeExtensions.hasOwnProperty(spec.name)) {
			var exts = modeExtensions[spec.name];
			for (var prop in exts) {
				if (!exts.hasOwnProperty(prop)) { continue }
				if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
				modeObj[prop] = exts[prop];
			}
		}
		modeObj.name = spec.name;
		if (spec.helperType) { modeObj.helperType = spec.helperType; }
		if (spec.modeProps) { for (var prop$1 in spec.modeProps)
			{ modeObj[prop$1] = spec.modeProps[prop$1]; } }

		return modeObj
	}

	// This can be used to attach properties to mode objects from
	// outside the actual mode definition.
	var modeExtensions = {};
	function extendMode(mode, properties) {
		var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
		copyObj(properties, exts);
	}

	function copyState(mode, state) {
		if (state === true) { return state }
		if (mode.copyState) { return mode.copyState(state) }
		var nstate = {};
		for (var n in state) {
			var val = state[n];
			if (val instanceof Array) { val = val.concat([]); }
			nstate[n] = val;
		}
		return nstate
	}

	// Given a mode and a state (for that mode), find the inner mode and
	// state at the position that the state refers to.
	function innerMode(mode, state) {
		var info;
		while (mode.innerMode) {
			info = mode.innerMode(state);
			if (!info || info.mode == mode) { break }
			state = info.state;
			mode = info.mode;
		}
		return info || {mode: mode, state: state}
	}

	function startState(mode, a1, a2) {
		return mode.startState ? mode.startState(a1, a2) : true
	}

	// STRING STREAM

	// Fed to the mode parsers, provides helper functions to make
	// parsers more succinct.

	var StringStream = function(string, tabSize, lineOracle) {
		this.pos = this.start = 0;
		this.string = string;
		this.tabSize = tabSize || 8;
		this.lastColumnPos = this.lastColumnValue = 0;
		this.lineStart = 0;
		this.lineOracle = lineOracle;
	};

	StringStream.prototype.eol = function () {return this.pos >= this.string.length};
	StringStream.prototype.sol = function () {return this.pos == this.lineStart};
	StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
	StringStream.prototype.next = function () {
		if (this.pos < this.string.length)
			{ return this.string.charAt(this.pos++) }
	};
	StringStream.prototype.eat = function (match) {
		var ch = this.string.charAt(this.pos);
		var ok;
		if (typeof match == "string") { ok = ch == match; }
		else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
		if (ok) {++this.pos; return ch}
	};
	StringStream.prototype.eatWhile = function (match) {
		var start = this.pos;
		while (this.eat(match)){}
		return this.pos > start
	};
	StringStream.prototype.eatSpace = function () {
			var this$1 = this;

		var start = this.pos;
		while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this$1.pos; }
		return this.pos > start
	};
	StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
	StringStream.prototype.skipTo = function (ch) {
		var found = this.string.indexOf(ch, this.pos);
		if (found > -1) {this.pos = found; return true}
	};
	StringStream.prototype.backUp = function (n) {this.pos -= n;};
	StringStream.prototype.column = function () {
		if (this.lastColumnPos < this.start) {
			this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
			this.lastColumnPos = this.start;
		}
		return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
	};
	StringStream.prototype.indentation = function () {
		return countColumn(this.string, null, this.tabSize) -
			(this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
	};
	StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
		if (typeof pattern == "string") {
			var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
			var substr = this.string.substr(this.pos, pattern.length);
			if (cased(substr) == cased(pattern)) {
				if (consume !== false) { this.pos += pattern.length; }
				return true
			}
		} else {
			var match = this.string.slice(this.pos).match(pattern);
			if (match && match.index > 0) { return null }
			if (match && consume !== false) { this.pos += match[0].length; }
			return match
		}
	};
	StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
	StringStream.prototype.hideFirstChars = function (n, inner) {
		this.lineStart += n;
		try { return inner() }
		finally { this.lineStart -= n; }
	};
	StringStream.prototype.lookAhead = function (n) {
		var oracle = this.lineOracle;
		return oracle && oracle.lookAhead(n)
	};
	StringStream.prototype.baseToken = function () {
		var oracle = this.lineOracle;
		return oracle && oracle.baseToken(this.pos)
	};

	// Find the line object corresponding to the given line number.
	function getLine(doc, n) {
		n -= doc.first;
		if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
		var chunk = doc;
		while (!chunk.lines) {
			for (var i = 0;; ++i) {
				var child = chunk.children[i], sz = child.chunkSize();
				if (n < sz) { chunk = child; break }
				n -= sz;
			}
		}
		return chunk.lines[n]
	}

	// Get the part of a document between two positions, as an array of
	// strings.
	function getBetween(doc, start, end) {
		var out = [], n = start.line;
		doc.iter(start.line, end.line + 1, function (line) {
			var text = line.text;
			if (n == end.line) { text = text.slice(0, end.ch); }
			if (n == start.line) { text = text.slice(start.ch); }
			out.push(text);
			++n;
		});
		return out
	}
	// Get the lines between from and to, as array of strings.
	function getLines(doc, from, to) {
		var out = [];
		doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
		return out
	}

	// Update the height of a line, propagating the height change
	// upwards to parent nodes.
	function updateLineHeight(line, height) {
		var diff = height - line.height;
		if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
	}

	// Given a line object, find its line number by walking up through
	// its parent links.
	function lineNo(line) {
		if (line.parent == null) { return null }
		var cur = line.parent, no = indexOf(cur.lines, line);
		for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
			for (var i = 0;; ++i) {
				if (chunk.children[i] == cur) { break }
				no += chunk.children[i].chunkSize();
			}
		}
		return no + cur.first
	}

	// Find the line at the given vertical position, using the height
	// information in the document tree.
	function lineAtHeight(chunk, h) {
		var n = chunk.first;
		outer: do {
			for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
				var child = chunk.children[i$1], ch = child.height;
				if (h < ch) { chunk = child; continue outer }
				h -= ch;
				n += child.chunkSize();
			}
			return n
		} while (!chunk.lines)
		var i = 0;
		for (; i < chunk.lines.length; ++i) {
			var line = chunk.lines[i], lh = line.height;
			if (h < lh) { break }
			h -= lh;
		}
		return n + i
	}

	function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}

	function lineNumberFor(options, i) {
		return String(options.lineNumberFormatter(i + options.firstLineNumber))
	}

	// A Pos instance represents a position within the text.
	function Pos(line, ch, sticky) {
		if ( sticky === void 0 ) sticky = null;

		if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
		this.line = line;
		this.ch = ch;
		this.sticky = sticky;
	}

	// Compare two positions, return 0 if they are the same, a negative
	// number when a is less, and a positive number otherwise.
	function cmp(a, b) { return a.line - b.line || a.ch - b.ch }

	function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }

	function copyPos(x) {return Pos(x.line, x.ch)}
	function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
	function minPos(a, b) { return cmp(a, b) < 0 ? a : b }

	// Most of the external API clips given positions to make sure they
	// actually exist within the document.
	function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
	function clipPos(doc, pos) {
		if (pos.line < doc.first) { return Pos(doc.first, 0) }
		var last = doc.first + doc.size - 1;
		if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
		return clipToLen(pos, getLine(doc, pos.line).text.length)
	}
	function clipToLen(pos, linelen) {
		var ch = pos.ch;
		if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
		else if (ch < 0) { return Pos(pos.line, 0) }
		else { return pos }
	}
	function clipPosArray(doc, array) {
		var out = [];
		for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
		return out
	}

	var SavedContext = function(state, lookAhead) {
		this.state = state;
		this.lookAhead = lookAhead;
	};

	var Context = function(doc, state, line, lookAhead) {
		this.state = state;
		this.doc = doc;
		this.line = line;
		this.maxLookAhead = lookAhead || 0;
		this.baseTokens = null;
		this.baseTokenPos = 1;
	};

	Context.prototype.lookAhead = function (n) {
		var line = this.doc.getLine(this.line + n);
		if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
		return line
	};

	Context.prototype.baseToken = function (n) {
			var this$1 = this;

		if (!this.baseTokens) { return null }
		while (this.baseTokens[this.baseTokenPos] <= n)
			{ this$1.baseTokenPos += 2; }
		var type = this.baseTokens[this.baseTokenPos + 1];
		return {type: type && type.replace(/( |^)overlay .*/, ""),
						size: this.baseTokens[this.baseTokenPos] - n}
	};

	Context.prototype.nextLine = function () {
		this.line++;
		if (this.maxLookAhead > 0) { this.maxLookAhead--; }
	};

	Context.fromSaved = function (doc, saved, line) {
		if (saved instanceof SavedContext)
			{ return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
		else
			{ return new Context(doc, copyState(doc.mode, saved), line) }
	};

	Context.prototype.save = function (copy) {
		var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
		return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
	};


	// Compute a style array (an array starting with a mode generation
	// -- for invalidation -- followed by pairs of end positions and
	// style strings), which is used to highlight the tokens on the
	// line.
	function highlightLine(cm, line, context, forceToEnd) {
		// A styles array always starts with a number identifying the
		// mode/overlays that it is based on (for easy invalidation).
		var st = [cm.state.modeGen], lineClasses = {};
		// Compute the base array of styles
		runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
						lineClasses, forceToEnd);
		var state = context.state;

		// Run overlays, adjust style array.
		var loop = function ( o ) {
			context.baseTokens = st;
			var overlay = cm.state.overlays[o], i = 1, at = 0;
			context.state = true;
			runMode(cm, line.text, overlay.mode, context, function (end, style) {
				var start = i;
				// Ensure there's a token end at the current position, and that i points at it
				while (at < end) {
					var i_end = st[i];
					if (i_end > end)
						{ st.splice(i, 1, end, st[i+1], i_end); }
					i += 2;
					at = Math.min(end, i_end);
				}
				if (!style) { return }
				if (overlay.opaque) {
					st.splice(start, i - start, end, "overlay " + style);
					i = start + 2;
				} else {
					for (; start < i; start += 2) {
						var cur = st[start+1];
						st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
					}
				}
			}, lineClasses);
			context.state = state;
			context.baseTokens = null;
			context.baseTokenPos = 1;
		};

		for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );

		return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
	}

	function getLineStyles(cm, line, updateFrontier) {
		if (!line.styles || line.styles[0] != cm.state.modeGen) {
			var context = getContextBefore(cm, lineNo(line));
			var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
			var result = highlightLine(cm, line, context);
			if (resetState) { context.state = resetState; }
			line.stateAfter = context.save(!resetState);
			line.styles = result.styles;
			if (result.classes) { line.styleClasses = result.classes; }
			else if (line.styleClasses) { line.styleClasses = null; }
			if (updateFrontier === cm.doc.highlightFrontier)
				{ cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
		}
		return line.styles
	}

	function getContextBefore(cm, n, precise) {
		var doc = cm.doc, display = cm.display;
		if (!doc.mode.startState) { return new Context(doc, true, n) }
		var start = findStartLine(cm, n, precise);
		var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
		var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);

		doc.iter(start, n, function (line) {
			processLine(cm, line.text, context);
			var pos = context.line;
			line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
			context.nextLine();
		});
		if (precise) { doc.modeFrontier = context.line; }
		return context
	}

	// Lightweight form of highlight -- proceed over this line and
	// update state, but don't save a style array. Used for lines that
	// aren't currently visible.
	function processLine(cm, text, context, startAt) {
		var mode = cm.doc.mode;
		var stream = new StringStream(text, cm.options.tabSize, context);
		stream.start = stream.pos = startAt || 0;
		if (text == "") { callBlankLine(mode, context.state); }
		while (!stream.eol()) {
			readToken(mode, stream, context.state);
			stream.start = stream.pos;
		}
	}

	function callBlankLine(mode, state) {
		if (mode.blankLine) { return mode.blankLine(state) }
		if (!mode.innerMode) { return }
		var inner = innerMode(mode, state);
		if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
	}

	function readToken(mode, stream, state, inner) {
		for (var i = 0; i < 10; i++) {
			if (inner) { inner[0] = innerMode(mode, state).mode; }
			var style = mode.token(stream, state);
			if (stream.pos > stream.start) { return style }
		}
		throw new Error("Mode " + mode.name + " failed to advance stream.")
	}

	var Token = function(stream, type, state) {
		this.start = stream.start; this.end = stream.pos;
		this.string = stream.current();
		this.type = type || null;
		this.state = state;
	};

	// Utility for getTokenAt and getLineTokens
	function takeToken(cm, pos, precise, asArray) {
		var doc = cm.doc, mode = doc.mode, style;
		pos = clipPos(doc, pos);
		var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
		var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
		if (asArray) { tokens = []; }
		while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
			stream.start = stream.pos;
			style = readToken(mode, stream, context.state);
			if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
		}
		return asArray ? tokens : new Token(stream, style, context.state)
	}

	function extractLineClasses(type, output) {
		if (type) { for (;;) {
			var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
			if (!lineClass) { break }
			type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
			var prop = lineClass[1] ? "bgClass" : "textClass";
			if (output[prop] == null)
				{ output[prop] = lineClass[2]; }
			else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop]))
				{ output[prop] += " " + lineClass[2]; }
		} }
		return type
	}

	// Run the given mode's parser over a line, calling f for each token.
	function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
		var flattenSpans = mode.flattenSpans;
		if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
		var curStart = 0, curStyle = null;
		var stream = new StringStream(text, cm.options.tabSize, context), style;
		var inner = cm.options.addModeClass && [null];
		if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
		while (!stream.eol()) {
			if (stream.pos > cm.options.maxHighlightLength) {
				flattenSpans = false;
				if (forceToEnd) { processLine(cm, text, context, stream.pos); }
				stream.pos = text.length;
				style = null;
			} else {
				style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
			}
			if (inner) {
				var mName = inner[0].name;
				if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
			}
			if (!flattenSpans || curStyle != style) {
				while (curStart < stream.start) {
					curStart = Math.min(stream.start, curStart + 5000);
					f(curStart, curStyle);
				}
				curStyle = style;
			}
			stream.start = stream.pos;
		}
		while (curStart < stream.pos) {
			// Webkit seems to refuse to render text nodes longer than 57444
			// characters, and returns inaccurate measurements in nodes
			// starting around 5000 chars.
			var pos = Math.min(stream.pos, curStart + 5000);
			f(pos, curStyle);
			curStart = pos;
		}
	}

	// Finds the line to start with when starting a parse. Tries to
	// find a line with a stateAfter, so that it can start with a
	// valid state. If that fails, it returns the line with the
	// smallest indentation, which tends to need the least context to
	// parse correctly.
	function findStartLine(cm, n, precise) {
		var minindent, minline, doc = cm.doc;
		var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
		for (var search = n; search > lim; --search) {
			if (search <= doc.first) { return doc.first }
			var line = getLine(doc, search - 1), after = line.stateAfter;
			if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
				{ return search }
			var indented = countColumn(line.text, null, cm.options.tabSize);
			if (minline == null || minindent > indented) {
				minline = search - 1;
				minindent = indented;
			}
		}
		return minline
	}

	function retreatFrontier(doc, n) {
		doc.modeFrontier = Math.min(doc.modeFrontier, n);
		if (doc.highlightFrontier < n - 10) { return }
		var start = doc.first;
		for (var line = n - 1; line > start; line--) {
			var saved = getLine(doc, line).stateAfter;
			// change is on 3
			// state on line 1 looked ahead 2 -- so saw 3
			// test 1 + 2 < 3 should cover this
			if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
				start = line + 1;
				break
			}
		}
		doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
	}

	// Optimize some code when these features are not used.
	var sawReadOnlySpans = false, sawCollapsedSpans = false;

	function seeReadOnlySpans() {
		sawReadOnlySpans = true;
	}

	function seeCollapsedSpans() {
		sawCollapsedSpans = true;
	}

	// TEXTMARKER SPANS

	function MarkedSpan(marker, from, to) {
		this.marker = marker;
		this.from = from; this.to = to;
	}

	// Search an array of spans for a span matching the given marker.
	function getMarkedSpanFor(spans, marker) {
		if (spans) { for (var i = 0; i < spans.length; ++i) {
			var span = spans[i];
			if (span.marker == marker) { return span }
		} }
	}
	// Remove a span from an array, returning undefined if no spans are
	// left (we don't store arrays for lines without spans).
	function removeMarkedSpan(spans, span) {
		var r;
		for (var i = 0; i < spans.length; ++i)
			{ if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
		return r
	}
	// Add a span to a line.
	function addMarkedSpan(line, span) {
		line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
		span.marker.attachLine(line);
	}

	// Used for the algorithm that adjusts markers for a change in the
	// document. These functions cut an array of spans at a given
	// character position, returning an array of remaining chunks (or
	// undefined if nothing remains).
	function markedSpansBefore(old, startCh, isInsert) {
		var nw;
		if (old) { for (var i = 0; i < old.length; ++i) {
			var span = old[i], marker = span.marker;
			var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
			if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
				var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
				;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
			}
		} }
		return nw
	}
	function markedSpansAfter(old, endCh, isInsert) {
		var nw;
		if (old) { for (var i = 0; i < old.length; ++i) {
			var span = old[i], marker = span.marker;
			var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
			if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
				var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
				;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
																							span.to == null ? null : span.to - endCh));
			}
		} }
		return nw
	}

	// Given a change object, compute the new set of marker spans that
	// cover the line in which the change took place. Removes spans
	// entirely within the change, reconnects spans belonging to the
	// same marker that appear on both sides of the change, and cuts off
	// spans partially within the change. Returns an array of span
	// arrays with one element for each line in (after) the change.
	function stretchSpansOverChange(doc, change) {
		if (change.full) { return null }
		var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
		var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
		if (!oldFirst && !oldLast) { return null }

		var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
		// Get the spans that 'stick out' on both sides
		var first = markedSpansBefore(oldFirst, startCh, isInsert);
		var last = markedSpansAfter(oldLast, endCh, isInsert);

		// Next, merge those two ends
		var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
		if (first) {
			// Fix up .to properties of first
			for (var i = 0; i < first.length; ++i) {
				var span = first[i];
				if (span.to == null) {
					var found = getMarkedSpanFor(last, span.marker);
					if (!found) { span.to = startCh; }
					else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
				}
			}
		}
		if (last) {
			// Fix up .from in last (or move them into first in case of sameLine)
			for (var i$1 = 0; i$1 < last.length; ++i$1) {
				var span$1 = last[i$1];
				if (span$1.to != null) { span$1.to += offset; }
				if (span$1.from == null) {
					var found$1 = getMarkedSpanFor(first, span$1.marker);
					if (!found$1) {
						span$1.from = offset;
						if (sameLine) { (first || (first = [])).push(span$1); }
					}
				} else {
					span$1.from += offset;
					if (sameLine) { (first || (first = [])).push(span$1); }
				}
			}
		}
		// Make sure we didn't create any zero-length spans
		if (first) { first = clearEmptySpans(first); }
		if (last && last != first) { last = clearEmptySpans(last); }

		var newMarkers = [first];
		if (!sameLine) {
			// Fill gap with whole-line-spans
			var gap = change.text.length - 2, gapMarkers;
			if (gap > 0 && first)
				{ for (var i$2 = 0; i$2 < first.length; ++i$2)
					{ if (first[i$2].to == null)
						{ (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
			for (var i$3 = 0; i$3 < gap; ++i$3)
				{ newMarkers.push(gapMarkers); }
			newMarkers.push(last);
		}
		return newMarkers
	}

	// Remove spans that are empty and don't have a clearWhenEmpty
	// option of false.
	function clearEmptySpans(spans) {
		for (var i = 0; i < spans.length; ++i) {
			var span = spans[i];
			if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
				{ spans.splice(i--, 1); }
		}
		if (!spans.length) { return null }
		return spans
	}

	// Used to 'clip' out readOnly ranges when making a change.
	function removeReadOnlyRanges(doc, from, to) {
		var markers = null;
		doc.iter(from.line, to.line + 1, function (line) {
			if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
				var mark = line.markedSpans[i].marker;
				if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
					{ (markers || (markers = [])).push(mark); }
			} }
		});
		if (!markers) { return null }
		var parts = [{from: from, to: to}];
		for (var i = 0; i < markers.length; ++i) {
			var mk = markers[i], m = mk.find(0);
			for (var j = 0; j < parts.length; ++j) {
				var p = parts[j];
				if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
				var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
				if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
					{ newParts.push({from: p.from, to: m.from}); }
				if (dto > 0 || !mk.inclusiveRight && !dto)
					{ newParts.push({from: m.to, to: p.to}); }
				parts.splice.apply(parts, newParts);
				j += newParts.length - 3;
			}
		}
		return parts
	}

	// Connect or disconnect spans from a line.
	function detachMarkedSpans(line) {
		var spans = line.markedSpans;
		if (!spans) { return }
		for (var i = 0; i < spans.length; ++i)
			{ spans[i].marker.detachLine(line); }
		line.markedSpans = null;
	}
	function attachMarkedSpans(line, spans) {
		if (!spans) { return }
		for (var i = 0; i < spans.length; ++i)
			{ spans[i].marker.attachLine(line); }
		line.markedSpans = spans;
	}

	// Helpers used when computing which overlapping collapsed span
	// counts as the larger one.
	function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
	function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }

	// Returns a number indicating which of two overlapping collapsed
	// spans is larger (and thus includes the other). Falls back to
	// comparing ids when the spans cover exactly the same range.
	function compareCollapsedMarkers(a, b) {
		var lenDiff = a.lines.length - b.lines.length;
		if (lenDiff != 0) { return lenDiff }
		var aPos = a.find(), bPos = b.find();
		var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
		if (fromCmp) { return -fromCmp }
		var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
		if (toCmp) { return toCmp }
		return b.id - a.id
	}

	// Find out whether a line ends or starts in a collapsed span. If
	// so, return the marker for that span.
	function collapsedSpanAtSide(line, start) {
		var sps = sawCollapsedSpans && line.markedSpans, found;
		if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
			sp = sps[i];
			if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
					(!found || compareCollapsedMarkers(found, sp.marker) < 0))
				{ found = sp.marker; }
		} }
		return found
	}
	function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
	function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }

	function collapsedSpanAround(line, ch) {
		var sps = sawCollapsedSpans && line.markedSpans, found;
		if (sps) { for (var i = 0; i < sps.length; ++i) {
			var sp = sps[i];
			if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
					(!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
		} }
		return found
	}

	// Test whether there exists a collapsed span that partially
	// overlaps (covers the start or end, but not both) of a new span.
	// Such overlap is not allowed.
	function conflictingCollapsedRange(doc, lineNo$$1, from, to, marker) {
		var line = getLine(doc, lineNo$$1);
		var sps = sawCollapsedSpans && line.markedSpans;
		if (sps) { for (var i = 0; i < sps.length; ++i) {
			var sp = sps[i];
			if (!sp.marker.collapsed) { continue }
			var found = sp.marker.find(0);
			var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
			var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
			if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
			if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
					fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
				{ return true }
		} }
	}

	// A visual line is a line as drawn on the screen. Folding, for
	// example, can cause multiple logical lines to appear on the same
	// visual line. This finds the start of the visual line that the
	// given line is part of (usually that is the line itself).
	function visualLine(line) {
		var merged;
		while (merged = collapsedSpanAtStart(line))
			{ line = merged.find(-1, true).line; }
		return line
	}

	function visualLineEnd(line) {
		var merged;
		while (merged = collapsedSpanAtEnd(line))
			{ line = merged.find(1, true).line; }
		return line
	}

	// Returns an array of logical lines that continue the visual line
	// started by the argument, or undefined if there are no such lines.
	function visualLineContinued(line) {
		var merged, lines;
		while (merged = collapsedSpanAtEnd(line)) {
			line = merged.find(1, true).line
			;(lines || (lines = [])).push(line);
		}
		return lines
	}

	// Get the line number of the start of the visual line that the
	// given line number is part of.
	function visualLineNo(doc, lineN) {
		var line = getLine(doc, lineN), vis = visualLine(line);
		if (line == vis) { return lineN }
		return lineNo(vis)
	}

	// Get the line number of the start of the next visual line after
	// the given line.
	function visualLineEndNo(doc, lineN) {
		if (lineN > doc.lastLine()) { return lineN }
		var line = getLine(doc, lineN), merged;
		if (!lineIsHidden(doc, line)) { return lineN }
		while (merged = collapsedSpanAtEnd(line))
			{ line = merged.find(1, true).line; }
		return lineNo(line) + 1
	}

	// Compute whether a line is hidden. Lines count as hidden when they
	// are part of a visual line that starts with another line, or when
	// they are entirely covered by collapsed, non-widget span.
	function lineIsHidden(doc, line) {
		var sps = sawCollapsedSpans && line.markedSpans;
		if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
			sp = sps[i];
			if (!sp.marker.collapsed) { continue }
			if (sp.from == null) { return true }
			if (sp.marker.widgetNode) { continue }
			if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
				{ return true }
		} }
	}
	function lineIsHiddenInner(doc, line, span) {
		if (span.to == null) {
			var end = span.marker.find(1, true);
			return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
		}
		if (span.marker.inclusiveRight && span.to == line.text.length)
			{ return true }
		for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
			sp = line.markedSpans[i];
			if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
					(sp.to == null || sp.to != span.from) &&
					(sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
					lineIsHiddenInner(doc, line, sp)) { return true }
		}
	}

	// Find the height above the given line.
	function heightAtLine(lineObj) {
		lineObj = visualLine(lineObj);

		var h = 0, chunk = lineObj.parent;
		for (var i = 0; i < chunk.lines.length; ++i) {
			var line = chunk.lines[i];
			if (line == lineObj) { break }
			else { h += line.height; }
		}
		for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
			for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
				var cur = p.children[i$1];
				if (cur == chunk) { break }
				else { h += cur.height; }
			}
		}
		return h
	}

	// Compute the character length of a line, taking into account
	// collapsed ranges (see markText) that might hide parts, and join
	// other lines onto it.
	function lineLength(line) {
		if (line.height == 0) { return 0 }
		var len = line.text.length, merged, cur = line;
		while (merged = collapsedSpanAtStart(cur)) {
			var found = merged.find(0, true);
			cur = found.from.line;
			len += found.from.ch - found.to.ch;
		}
		cur = line;
		while (merged = collapsedSpanAtEnd(cur)) {
			var found$1 = merged.find(0, true);
			len -= cur.text.length - found$1.from.ch;
			cur = found$1.to.line;
			len += cur.text.length - found$1.to.ch;
		}
		return len
	}

	// Find the longest line in the document.
	function findMaxLine(cm) {
		var d = cm.display, doc = cm.doc;
		d.maxLine = getLine(doc, doc.first);
		d.maxLineLength = lineLength(d.maxLine);
		d.maxLineChanged = true;
		doc.iter(function (line) {
			var len = lineLength(line);
			if (len > d.maxLineLength) {
				d.maxLineLength = len;
				d.maxLine = line;
			}
		});
	}

	// LINE DATA STRUCTURE

	// Line objects. These hold state related to a line, including
	// highlighting info (the styles array).
	var Line = function(text, markedSpans, estimateHeight) {
		this.text = text;
		attachMarkedSpans(this, markedSpans);
		this.height = estimateHeight ? estimateHeight(this) : 1;
	};

	Line.prototype.lineNo = function () { return lineNo(this) };
	eventMixin(Line);

	// Change the content (text, markers) of a line. Automatically
	// invalidates cached information and tries to re-estimate the
	// line's height.
	function updateLine(line, text, markedSpans, estimateHeight) {
		line.text = text;
		if (line.stateAfter) { line.stateAfter = null; }
		if (line.styles) { line.styles = null; }
		if (line.order != null) { line.order = null; }
		detachMarkedSpans(line);
		attachMarkedSpans(line, markedSpans);
		var estHeight = estimateHeight ? estimateHeight(line) : 1;
		if (estHeight != line.height) { updateLineHeight(line, estHeight); }
	}

	// Detach a line from the document tree and its markers.
	function cleanUpLine(line) {
		line.parent = null;
		detachMarkedSpans(line);
	}

	// Convert a style as returned by a mode (either null, or a string
	// containing one or more styles) to a CSS style. This is cached,
	// and also looks for line-wide styles.
	var styleToClassCache = {}, styleToClassCacheWithMode = {};
	function interpretTokenStyle(style, options) {
		if (!style || /^\s*$/.test(style)) { return null }
		var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
		return cache[style] ||
			(cache[style] = style.replace(/\S+/g, "cm-$&"))
	}

	// Render the DOM representation of the text of a line. Also builds
	// up a 'line map', which points at the DOM nodes that represent
	// specific stretches of text, and is used by the measuring code.
	// The returned object contains the DOM node, this map, and
	// information about line-wide styles that were set by the mode.
	function buildLineContent(cm, lineView) {
		// The padding-right forces the element to have a 'border', which
		// is needed on Webkit to be able to get line-level bounding
		// rectangles for it (in measureChar).
		var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
		var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
									 col: 0, pos: 0, cm: cm,
									 trailingSpace: false,
									 splitSpaces: cm.getOption("lineWrapping")};
		lineView.measure = {};

		// Iterate over the logical lines that make up this visual line.
		for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
			var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
			builder.pos = 0;
			builder.addToken = buildToken;
			// Optionally wire in some hacks into the token-rendering
			// algorithm, to deal with browser quirks.
			if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
				{ builder.addToken = buildTokenBadBidi(builder.addToken, order); }
			builder.map = [];
			var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
			insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
			if (line.styleClasses) {
				if (line.styleClasses.bgClass)
					{ builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
				if (line.styleClasses.textClass)
					{ builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
			}

			// Ensure at least a single node is present, for measuring.
			if (builder.map.length == 0)
				{ builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }

			// Store the map and a cache object for the current logical line
			if (i == 0) {
				lineView.measure.map = builder.map;
				lineView.measure.cache = {};
			} else {
	(lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
				;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
			}
		}

		// See issue #2901
		if (webkit) {
			var last = builder.content.lastChild;
			if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
				{ builder.content.className = "cm-tab-wrap-hack"; }
		}

		signal(cm, "renderLine", cm, lineView.line, builder.pre);
		if (builder.pre.className)
			{ builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }

		return builder
	}

	function defaultSpecialCharPlaceholder(ch) {
		var token = elt("span", "\u2022", "cm-invalidchar");
		token.title = "\\u" + ch.charCodeAt(0).toString(16);
		token.setAttribute("aria-label", token.title);
		return token
	}

	// Build up the DOM representation for a single token, and add it to
	// the line map. Takes care to render special characters separately.
	function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
		if (!text) { return }
		var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
		var special = builder.cm.state.specialChars, mustWrap = false;
		var content;
		if (!special.test(text)) {
			builder.col += text.length;
			content = document.createTextNode(displayText);
			builder.map.push(builder.pos, builder.pos + text.length, content);
			if (ie && ie_version < 9) { mustWrap = true; }
			builder.pos += text.length;
		} else {
			content = document.createDocumentFragment();
			var pos = 0;
			while (true) {
				special.lastIndex = pos;
				var m = special.exec(text);
				var skipped = m ? m.index - pos : text.length - pos;
				if (skipped) {
					var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
					if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
					else { content.appendChild(txt); }
					builder.map.push(builder.pos, builder.pos + skipped, txt);
					builder.col += skipped;
					builder.pos += skipped;
				}
				if (!m) { break }
				pos += skipped + 1;
				var txt$1 = (void 0);
				if (m[0] == "\t") {
					var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
					txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
					txt$1.setAttribute("role", "presentation");
					txt$1.setAttribute("cm-text", "\t");
					builder.col += tabWidth;
				} else if (m[0] == "\r" || m[0] == "\n") {
					txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
					txt$1.setAttribute("cm-text", m[0]);
					builder.col += 1;
				} else {
					txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
					txt$1.setAttribute("cm-text", m[0]);
					if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
					else { content.appendChild(txt$1); }
					builder.col += 1;
				}
				builder.map.push(builder.pos, builder.pos + 1, txt$1);
				builder.pos++;
			}
		}
		builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
		if (style || startStyle || endStyle || mustWrap || css) {
			var fullStyle = style || "";
			if (startStyle) { fullStyle += startStyle; }
			if (endStyle) { fullStyle += endStyle; }
			var token = elt("span", [content], fullStyle, css);
			if (attributes) {
				for (var attr in attributes) { if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
					{ token.setAttribute(attr, attributes[attr]); } }
			}
			return builder.content.appendChild(token)
		}
		builder.content.appendChild(content);
	}

	// Change some spaces to NBSP to prevent the browser from collapsing
	// trailing spaces at the end of a line when rendering text (issue #1362).
	function splitSpaces(text, trailingBefore) {
		if (text.length > 1 && !/  /.test(text)) { return text }
		var spaceBefore = trailingBefore, result = "";
		for (var i = 0; i < text.length; i++) {
			var ch = text.charAt(i);
			if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
				{ ch = "\u00a0"; }
			result += ch;
			spaceBefore = ch == " ";
		}
		return result
	}

	// Work around nonsense dimensions being reported for stretches of
	// right-to-left text.
	function buildTokenBadBidi(inner, order) {
		return function (builder, text, style, startStyle, endStyle, css, attributes) {
			style = style ? style + " cm-force-border" : "cm-force-border";
			var start = builder.pos, end = start + text.length;
			for (;;) {
				// Find the part that overlaps with the start of this text
				var part = (void 0);
				for (var i = 0; i < order.length; i++) {
					part = order[i];
					if (part.to > start && part.from <= start) { break }
				}
				if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, css, attributes) }
				inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes);
				startStyle = null;
				text = text.slice(part.to - start);
				start = part.to;
			}
		}
	}

	function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
		var widget = !ignoreWidget && marker.widgetNode;
		if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
		if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
			if (!widget)
				{ widget = builder.content.appendChild(document.createElement("span")); }
			widget.setAttribute("cm-marker", marker.id);
		}
		if (widget) {
			builder.cm.display.input.setUneditable(widget);
			builder.content.appendChild(widget);
		}
		builder.pos += size;
		builder.trailingSpace = false;
	}

	// Outputs a number of spans to make up a line, taking highlighting
	// and marked text into account.
	function insertLineContent(line, builder, styles) {
		var spans = line.markedSpans, allText = line.text, at = 0;
		if (!spans) {
			for (var i$1 = 1; i$1 < styles.length; i$1+=2)
				{ builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
			return
		}

		var len = allText.length, pos = 0, i = 1, text = "", style, css;
		var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes;
		for (;;) {
			if (nextChange == pos) { // Update current marker set
				spanStyle = spanEndStyle = spanStartStyle = css = "";
				attributes = null;
				collapsed = null; nextChange = Infinity;
				var foundBookmarks = [], endStyles = (void 0);
				for (var j = 0; j < spans.length; ++j) {
					var sp = spans[j], m = sp.marker;
					if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
						foundBookmarks.push(m);
					} else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
						if (sp.to != null && sp.to != pos && nextChange > sp.to) {
							nextChange = sp.to;
							spanEndStyle = "";
						}
						if (m.className) { spanStyle += " " + m.className; }
						if (m.css) { css = (css ? css + ";" : "") + m.css; }
						if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
						if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
						// support for the old title property
						// https://github.com/codemirror/CodeMirror/pull/5673
						if (m.title) { (attributes || (attributes = {})).title = m.title; }
						if (m.attributes) {
							for (var attr in m.attributes)
								{ (attributes || (attributes = {}))[attr] = m.attributes[attr]; }
						}
						if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
							{ collapsed = sp; }
					} else if (sp.from > pos && nextChange > sp.from) {
						nextChange = sp.from;
					}
				}
				if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
					{ if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }

				if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
					{ buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
				if (collapsed && (collapsed.from || 0) == pos) {
					buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
														 collapsed.marker, collapsed.from == null);
					if (collapsed.to == null) { return }
					if (collapsed.to == pos) { collapsed = false; }
				}
			}
			if (pos >= len) { break }

			var upto = Math.min(len, nextChange);
			while (true) {
				if (text) {
					var end = pos + text.length;
					if (!collapsed) {
						var tokenText = end > upto ? text.slice(0, upto - pos) : text;
						builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
														 spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes);
					}
					if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
					pos = end;
					spanStartStyle = "";
				}
				text = allText.slice(at, at = styles[i++]);
				style = interpretTokenStyle(styles[i++], builder.cm.options);
			}
		}
	}


	// These objects are used to represent the visible (currently drawn)
	// part of the document. A LineView may correspond to multiple
	// logical lines, if those are connected by collapsed ranges.
	function LineView(doc, line, lineN) {
		// The starting line
		this.line = line;
		// Continuing lines, if any
		this.rest = visualLineContinued(line);
		// Number of logical lines in this visual line
		this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
		this.node = this.text = null;
		this.hidden = lineIsHidden(doc, line);
	}

	// Create a range of LineView objects for the given lines.
	function buildViewArray(cm, from, to) {
		var array = [], nextPos;
		for (var pos = from; pos < to; pos = nextPos) {
			var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
			nextPos = pos + view.size;
			array.push(view);
		}
		return array
	}

	var operationGroup = null;

	function pushOperation(op) {
		if (operationGroup) {
			operationGroup.ops.push(op);
		} else {
			op.ownsGroup = operationGroup = {
				ops: [op],
				delayedCallbacks: []
			};
		}
	}

	function fireCallbacksForOps(group) {
		// Calls delayed callbacks and cursorActivity handlers until no
		// new ones appear
		var callbacks = group.delayedCallbacks, i = 0;
		do {
			for (; i < callbacks.length; i++)
				{ callbacks[i].call(null); }
			for (var j = 0; j < group.ops.length; j++) {
				var op = group.ops[j];
				if (op.cursorActivityHandlers)
					{ while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
						{ op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
			}
		} while (i < callbacks.length)
	}

	function finishOperation(op, endCb) {
		var group = op.ownsGroup;
		if (!group) { return }

		try { fireCallbacksForOps(group); }
		finally {
			operationGroup = null;
			endCb(group);
		}
	}

	var orphanDelayedCallbacks = null;

	// Often, we want to signal events at a point where we are in the
	// middle of some work, but don't want the handler to start calling
	// other methods on the editor, which might be in an inconsistent
	// state or simply not expect any other events to happen.
	// signalLater looks whether there are any handlers, and schedules
	// them to be executed when the last operation ends, or, if no
	// operation is active, when a timeout fires.
	function signalLater(emitter, type /*, values...*/) {
		var arr = getHandlers(emitter, type);
		if (!arr.length) { return }
		var args = Array.prototype.slice.call(arguments, 2), list;
		if (operationGroup) {
			list = operationGroup.delayedCallbacks;
		} else if (orphanDelayedCallbacks) {
			list = orphanDelayedCallbacks;
		} else {
			list = orphanDelayedCallbacks = [];
			setTimeout(fireOrphanDelayed, 0);
		}
		var loop = function ( i ) {
			list.push(function () { return arr[i].apply(null, args); });
		};

		for (var i = 0; i < arr.length; ++i)
			loop( i );
	}

	function fireOrphanDelayed() {
		var delayed = orphanDelayedCallbacks;
		orphanDelayedCallbacks = null;
		for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
	}

	// When an aspect of a line changes, a string is added to
	// lineView.changes. This updates the relevant part of the line's
	// DOM structure.
	function updateLineForChanges(cm, lineView, lineN, dims) {
		for (var j = 0; j < lineView.changes.length; j++) {
			var type = lineView.changes[j];
			if (type == "text") { updateLineText(cm, lineView); }
			else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
			else if (type == "class") { updateLineClasses(cm, lineView); }
			else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
		}
		lineView.changes = null;
	}

	// Lines with gutter elements, widgets or a background class need to
	// be wrapped, and have the extra elements added to the wrapper div
	function ensureLineWrapped(lineView) {
		if (lineView.node == lineView.text) {
			lineView.node = elt("div", null, null, "position: relative");
			if (lineView.text.parentNode)
				{ lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
			lineView.node.appendChild(lineView.text);
			if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
		}
		return lineView.node
	}

	function updateLineBackground(cm, lineView) {
		var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
		if (cls) { cls += " CodeMirror-linebackground"; }
		if (lineView.background) {
			if (cls) { lineView.background.className = cls; }
			else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
		} else if (cls) {
			var wrap = ensureLineWrapped(lineView);
			lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
			cm.display.input.setUneditable(lineView.background);
		}
	}

	// Wrapper around buildLineContent which will reuse the structure
	// in display.externalMeasured when possible.
	function getLineContent(cm, lineView) {
		var ext = cm.display.externalMeasured;
		if (ext && ext.line == lineView.line) {
			cm.display.externalMeasured = null;
			lineView.measure = ext.measure;
			return ext.built
		}
		return buildLineContent(cm, lineView)
	}

	// Redraw the line's text. Interacts with the background and text
	// classes because the mode may output tokens that influence these
	// classes.
	function updateLineText(cm, lineView) {
		var cls = lineView.text.className;
		var built = getLineContent(cm, lineView);
		if (lineView.text == lineView.node) { lineView.node = built.pre; }
		lineView.text.parentNode.replaceChild(built.pre, lineView.text);
		lineView.text = built.pre;
		if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
			lineView.bgClass = built.bgClass;
			lineView.textClass = built.textClass;
			updateLineClasses(cm, lineView);
		} else if (cls) {
			lineView.text.className = cls;
		}
	}

	function updateLineClasses(cm, lineView) {
		updateLineBackground(cm, lineView);
		if (lineView.line.wrapClass)
			{ ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
		else if (lineView.node != lineView.text)
			{ lineView.node.className = ""; }
		var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
		lineView.text.className = textClass || "";
	}

	function updateLineGutter(cm, lineView, lineN, dims) {
		if (lineView.gutter) {
			lineView.node.removeChild(lineView.gutter);
			lineView.gutter = null;
		}
		if (lineView.gutterBackground) {
			lineView.node.removeChild(lineView.gutterBackground);
			lineView.gutterBackground = null;
		}
		if (lineView.line.gutterClass) {
			var wrap = ensureLineWrapped(lineView);
			lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
																			("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
			cm.display.input.setUneditable(lineView.gutterBackground);
			wrap.insertBefore(lineView.gutterBackground, lineView.text);
		}
		var markers = lineView.line.gutterMarkers;
		if (cm.options.lineNumbers || markers) {
			var wrap$1 = ensureLineWrapped(lineView);
			var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
			cm.display.input.setUneditable(gutterWrap);
			wrap$1.insertBefore(gutterWrap, lineView.text);
			if (lineView.line.gutterClass)
				{ gutterWrap.className += " " + lineView.line.gutterClass; }
			if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
				{ lineView.lineNumber = gutterWrap.appendChild(
					elt("div", lineNumberFor(cm.options, lineN),
							"CodeMirror-linenumber CodeMirror-gutter-elt",
							("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
			if (markers) { for (var k = 0; k < cm.display.gutterSpecs.length; ++k) {
				var id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id];
				if (found)
					{ gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
																		 ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
			} }
		}
	}

	function updateLineWidgets(cm, lineView, dims) {
		if (lineView.alignable) { lineView.alignable = null; }
		for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
			next = node.nextSibling;
			if (node.className == "CodeMirror-linewidget")
				{ lineView.node.removeChild(node); }
		}
		insertLineWidgets(cm, lineView, dims);
	}

	// Build a line's DOM representation from scratch
	function buildLineElement(cm, lineView, lineN, dims) {
		var built = getLineContent(cm, lineView);
		lineView.text = lineView.node = built.pre;
		if (built.bgClass) { lineView.bgClass = built.bgClass; }
		if (built.textClass) { lineView.textClass = built.textClass; }

		updateLineClasses(cm, lineView);
		updateLineGutter(cm, lineView, lineN, dims);
		insertLineWidgets(cm, lineView, dims);
		return lineView.node
	}

	// A lineView may contain multiple logical lines (when merged by
	// collapsed spans). The widgets for all of them need to be drawn.
	function insertLineWidgets(cm, lineView, dims) {
		insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
		if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
			{ insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
	}

	function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
		if (!line.widgets) { return }
		var wrap = ensureLineWrapped(lineView);
		for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
			var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
			if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
			positionLineWidget(widget, node, lineView, dims);
			cm.display.input.setUneditable(node);
			if (allowAbove && widget.above)
				{ wrap.insertBefore(node, lineView.gutter || lineView.text); }
			else
				{ wrap.appendChild(node); }
			signalLater(widget, "redraw");
		}
	}

	function positionLineWidget(widget, node, lineView, dims) {
		if (widget.noHScroll) {
	(lineView.alignable || (lineView.alignable = [])).push(node);
			var width = dims.wrapperWidth;
			node.style.left = dims.fixedPos + "px";
			if (!widget.coverGutter) {
				width -= dims.gutterTotalWidth;
				node.style.paddingLeft = dims.gutterTotalWidth + "px";
			}
			node.style.width = width + "px";
		}
		if (widget.coverGutter) {
			node.style.zIndex = 5;
			node.style.position = "relative";
			if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
		}
	}

	function widgetHeight(widget) {
		if (widget.height != null) { return widget.height }
		var cm = widget.doc.cm;
		if (!cm) { return 0 }
		if (!contains(document.body, widget.node)) {
			var parentStyle = "position: relative;";
			if (widget.coverGutter)
				{ parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
			if (widget.noHScroll)
				{ parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
			removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
		}
		return widget.height = widget.node.parentNode.offsetHeight
	}

	// Return true when the given mouse event happened in a widget
	function eventInWidget(display, e) {
		for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
			if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
					(n.parentNode == display.sizer && n != display.mover))
				{ return true }
		}
	}

	// POSITION MEASUREMENT

	function paddingTop(display) {return display.lineSpace.offsetTop}
	function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
	function paddingH(display) {
		if (display.cachedPaddingH) { return display.cachedPaddingH }
		var e = removeChildrenAndAdd(display.measure, elt("pre", "x"));
		var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
		var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
		if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
		return data
	}

	function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
	function displayWidth(cm) {
		return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
	}
	function displayHeight(cm) {
		return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
	}

	// Ensure the lineView.wrapping.heights array is populated. This is
	// an array of bottom offsets for the lines that make up a drawn
	// line. When lineWrapping is on, there might be more than one
	// height.
	function ensureLineHeights(cm, lineView, rect) {
		var wrapping = cm.options.lineWrapping;
		var curWidth = wrapping && displayWidth(cm);
		if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
			var heights = lineView.measure.heights = [];
			if (wrapping) {
				lineView.measure.width = curWidth;
				var rects = lineView.text.firstChild.getClientRects();
				for (var i = 0; i < rects.length - 1; i++) {
					var cur = rects[i], next = rects[i + 1];
					if (Math.abs(cur.bottom - next.bottom) > 2)
						{ heights.push((cur.bottom + next.top) / 2 - rect.top); }
				}
			}
			heights.push(rect.bottom - rect.top);
		}
	}

	// Find a line map (mapping character offsets to text nodes) and a
	// measurement cache for the given line number. (A line view might
	// contain multiple lines when collapsed ranges are present.)
	function mapFromLineView(lineView, line, lineN) {
		if (lineView.line == line)
			{ return {map: lineView.measure.map, cache: lineView.measure.cache} }
		for (var i = 0; i < lineView.rest.length; i++)
			{ if (lineView.rest[i] == line)
				{ return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
		for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
			{ if (lineNo(lineView.rest[i$1]) > lineN)
				{ return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
	}

	// Render a line into the hidden node display.externalMeasured. Used
	// when measurement is needed for a line that's not in the viewport.
	function updateExternalMeasurement(cm, line) {
		line = visualLine(line);
		var lineN = lineNo(line);
		var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
		view.lineN = lineN;
		var built = view.built = buildLineContent(cm, view);
		view.text = built.pre;
		removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
		return view
	}

	// Get a {top, bottom, left, right} box (in line-local coordinates)
	// for a given character.
	function measureChar(cm, line, ch, bias) {
		return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
	}

	// Find a line view that corresponds to the given line number.
	function findViewForLine(cm, lineN) {
		if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
			{ return cm.display.view[findViewIndex(cm, lineN)] }
		var ext = cm.display.externalMeasured;
		if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
			{ return ext }
	}

	// Measurement can be split in two steps, the set-up work that
	// applies to the whole line, and the measurement of the actual
	// character. Functions like coordsChar, that need to do a lot of
	// measurements in a row, can thus ensure that the set-up work is
	// only done once.
	function prepareMeasureForLine(cm, line) {
		var lineN = lineNo(line);
		var view = findViewForLine(cm, lineN);
		if (view && !view.text) {
			view = null;
		} else if (view && view.changes) {
			updateLineForChanges(cm, view, lineN, getDimensions(cm));
			cm.curOp.forceUpdate = true;
		}
		if (!view)
			{ view = updateExternalMeasurement(cm, line); }

		var info = mapFromLineView(view, line, lineN);
		return {
			line: line, view: view, rect: null,
			map: info.map, cache: info.cache, before: info.before,
			hasHeights: false
		}
	}

	// Given a prepared measurement object, measures the position of an
	// actual character (or fetches it from the cache).
	function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
		if (prepared.before) { ch = -1; }
		var key = ch + (bias || ""), found;
		if (prepared.cache.hasOwnProperty(key)) {
			found = prepared.cache[key];
		} else {
			if (!prepared.rect)
				{ prepared.rect = prepared.view.text.getBoundingClientRect(); }
			if (!prepared.hasHeights) {
				ensureLineHeights(cm, prepared.view, prepared.rect);
				prepared.hasHeights = true;
			}
			found = measureCharInner(cm, prepared, ch, bias);
			if (!found.bogus) { prepared.cache[key] = found; }
		}
		return {left: found.left, right: found.right,
						top: varHeight ? found.rtop : found.top,
						bottom: varHeight ? found.rbottom : found.bottom}
	}

	var nullRect = {left: 0, right: 0, top: 0, bottom: 0};

	function nodeAndOffsetInLineMap(map$$1, ch, bias) {
		var node, start, end, collapse, mStart, mEnd;
		// First, search the line map for the text node corresponding to,
		// or closest to, the target character.
		for (var i = 0; i < map$$1.length; i += 3) {
			mStart = map$$1[i];
			mEnd = map$$1[i + 1];
			if (ch < mStart) {
				start = 0; end = 1;
				collapse = "left";
			} else if (ch < mEnd) {
				start = ch - mStart;
				end = start + 1;
			} else if (i == map$$1.length - 3 || ch == mEnd && map$$1[i + 3] > ch) {
				end = mEnd - mStart;
				start = end - 1;
				if (ch >= mEnd) { collapse = "right"; }
			}
			if (start != null) {
				node = map$$1[i + 2];
				if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
					{ collapse = bias; }
				if (bias == "left" && start == 0)
					{ while (i && map$$1[i - 2] == map$$1[i - 3] && map$$1[i - 1].insertLeft) {
						node = map$$1[(i -= 3) + 2];
						collapse = "left";
					} }
				if (bias == "right" && start == mEnd - mStart)
					{ while (i < map$$1.length - 3 && map$$1[i + 3] == map$$1[i + 4] && !map$$1[i + 5].insertLeft) {
						node = map$$1[(i += 3) + 2];
						collapse = "right";
					} }
				break
			}
		}
		return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
	}

	function getUsefulRect(rects, bias) {
		var rect = nullRect;
		if (bias == "left") { for (var i = 0; i < rects.length; i++) {
			if ((rect = rects[i]).left != rect.right) { break }
		} } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
			if ((rect = rects[i$1]).left != rect.right) { break }
		} }
		return rect
	}

	function measureCharInner(cm, prepared, ch, bias) {
		var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
		var node = place.node, start = place.start, end = place.end, collapse = place.collapse;

		var rect;
		if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
			for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
				while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
				while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
				if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
					{ rect = node.parentNode.getBoundingClientRect(); }
				else
					{ rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
				if (rect.left || rect.right || start == 0) { break }
				end = start;
				start = start - 1;
				collapse = "right";
			}
			if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
		} else { // If it is a widget, simply get the box for the whole widget.
			if (start > 0) { collapse = bias = "right"; }
			var rects;
			if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
				{ rect = rects[bias == "right" ? rects.length - 1 : 0]; }
			else
				{ rect = node.getBoundingClientRect(); }
		}
		if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
			var rSpan = node.parentNode.getClientRects()[0];
			if (rSpan)
				{ rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
			else
				{ rect = nullRect; }
		}

		var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
		var mid = (rtop + rbot) / 2;
		var heights = prepared.view.measure.heights;
		var i = 0;
		for (; i < heights.length - 1; i++)
			{ if (mid < heights[i]) { break } }
		var top = i ? heights[i - 1] : 0, bot = heights[i];
		var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
									right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
									top: top, bottom: bot};
		if (!rect.left && !rect.right) { result.bogus = true; }
		if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }

		return result
	}

	// Work around problem with bounding client rects on ranges being
	// returned incorrectly when zoomed on IE10 and below.
	function maybeUpdateRectForZooming(measure, rect) {
		if (!window.screen || screen.logicalXDPI == null ||
				screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
			{ return rect }
		var scaleX = screen.logicalXDPI / screen.deviceXDPI;
		var scaleY = screen.logicalYDPI / screen.deviceYDPI;
		return {left: rect.left * scaleX, right: rect.right * scaleX,
						top: rect.top * scaleY, bottom: rect.bottom * scaleY}
	}

	function clearLineMeasurementCacheFor(lineView) {
		if (lineView.measure) {
			lineView.measure.cache = {};
			lineView.measure.heights = null;
			if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
				{ lineView.measure.caches[i] = {}; } }
		}
	}

	function clearLineMeasurementCache(cm) {
		cm.display.externalMeasure = null;
		removeChildren(cm.display.lineMeasure);
		for (var i = 0; i < cm.display.view.length; i++)
			{ clearLineMeasurementCacheFor(cm.display.view[i]); }
	}

	function clearCaches(cm) {
		clearLineMeasurementCache(cm);
		cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
		if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
		cm.display.lineNumChars = null;
	}

	function pageScrollX() {
		// Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
		// which causes page_Offset and bounding client rects to use
		// different reference viewports and invalidate our calculations.
		if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
		return window.pageXOffset || (document.documentElement || document.body).scrollLeft
	}
	function pageScrollY() {
		if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
		return window.pageYOffset || (document.documentElement || document.body).scrollTop
	}

	function widgetTopHeight(lineObj) {
		var height = 0;
		if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
			{ height += widgetHeight(lineObj.widgets[i]); } } }
		return height
	}

	// Converts a {top, bottom, left, right} box from line-local
	// coordinates into another coordinate system. Context may be one of
	// "line", "div" (display.lineDiv), "local"./null (editor), "window",
	// or "page".
	function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
		if (!includeWidgets) {
			var height = widgetTopHeight(lineObj);
			rect.top += height; rect.bottom += height;
		}
		if (context == "line") { return rect }
		if (!context) { context = "local"; }
		var yOff = heightAtLine(lineObj);
		if (context == "local") { yOff += paddingTop(cm.display); }
		else { yOff -= cm.display.viewOffset; }
		if (context == "page" || context == "window") {
			var lOff = cm.display.lineSpace.getBoundingClientRect();
			yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
			var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
			rect.left += xOff; rect.right += xOff;
		}
		rect.top += yOff; rect.bottom += yOff;
		return rect
	}

	// Coverts a box from "div" coords to another coordinate system.
	// Context may be "window", "page", "div", or "local"./null.
	function fromCoordSystem(cm, coords, context) {
		if (context == "div") { return coords }
		var left = coords.left, top = coords.top;
		// First move into "page" coordinate system
		if (context == "page") {
			left -= pageScrollX();
			top -= pageScrollY();
		} else if (context == "local" || !context) {
			var localBox = cm.display.sizer.getBoundingClientRect();
			left += localBox.left;
			top += localBox.top;
		}

		var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
		return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
	}

	function charCoords(cm, pos, context, lineObj, bias) {
		if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
		return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
	}

	// Returns a box for a given cursor position, which may have an
	// 'other' property containing the position of the secondary cursor
	// on a bidi boundary.
	// A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
	// and after `char - 1` in writing order of `char - 1`
	// A cursor Pos(line, char, "after") is on the same visual line as `char`
	// and before `char` in writing order of `char`
	// Examples (upper-case letters are RTL, lower-case are LTR):
	//     Pos(0, 1, ...)
	//     before   after
	// ab     a|b     a|b
	// aB     a|B     aB|
	// Ab     |Ab     A|b
	// AB     B|A     B|A
	// Every position after the last character on a line is considered to stick
	// to the last character on the line.
	function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
		lineObj = lineObj || getLine(cm.doc, pos.line);
		if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
		function get(ch, right) {
			var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
			if (right) { m.left = m.right; } else { m.right = m.left; }
			return intoCoordSystem(cm, lineObj, m, context)
		}
		var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
		if (ch >= lineObj.text.length) {
			ch = lineObj.text.length;
			sticky = "before";
		} else if (ch <= 0) {
			ch = 0;
			sticky = "after";
		}
		if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }

		function getBidi(ch, partPos, invert) {
			var part = order[partPos], right = part.level == 1;
			return get(invert ? ch - 1 : ch, right != invert)
		}
		var partPos = getBidiPartAt(order, ch, sticky);
		var other = bidiOther;
		var val = getBidi(ch, partPos, sticky == "before");
		if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
		return val
	}

	// Used to cheaply estimate the coordinates for a position. Used for
	// intermediate scroll updates.
	function estimateCoords(cm, pos) {
		var left = 0;
		pos = clipPos(cm.doc, pos);
		if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
		var lineObj = getLine(cm.doc, pos.line);
		var top = heightAtLine(lineObj) + paddingTop(cm.display);
		return {left: left, right: left, top: top, bottom: top + lineObj.height}
	}

	// Positions returned by coordsChar contain some extra information.
	// xRel is the relative x position of the input coordinates compared
	// to the found position (so xRel > 0 means the coordinates are to
	// the right of the character position, for example). When outside
	// is true, that means the coordinates lie outside the line's
	// vertical range.
	function PosWithInfo(line, ch, sticky, outside, xRel) {
		var pos = Pos(line, ch, sticky);
		pos.xRel = xRel;
		if (outside) { pos.outside = true; }
		return pos
	}

	// Compute the character position closest to the given coordinates.
	// Input must be lineSpace-local ("div" coordinate system).
	function coordsChar(cm, x, y) {
		var doc = cm.doc;
		y += cm.display.viewOffset;
		if (y < 0) { return PosWithInfo(doc.first, 0, null, true, -1) }
		var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
		if (lineN > last)
			{ return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, true, 1) }
		if (x < 0) { x = 0; }

		var lineObj = getLine(doc, lineN);
		for (;;) {
			var found = coordsCharInner(cm, lineObj, lineN, x, y);
			var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 ? 1 : 0));
			if (!collapsed) { return found }
			var rangeEnd = collapsed.find(1);
			if (rangeEnd.line == lineN) { return rangeEnd }
			lineObj = getLine(doc, lineN = rangeEnd.line);
		}
	}

	function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
		y -= widgetTopHeight(lineObj);
		var end = lineObj.text.length;
		var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
		end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
		return {begin: begin, end: end}
	}

	function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
		if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
		var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
		return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
	}

	// Returns true if the given side of a box is after the given
	// coordinates, in top-to-bottom, left-to-right order.
	function boxIsAfter(box, x, y, left) {
		return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
	}

	function coordsCharInner(cm, lineObj, lineNo$$1, x, y) {
		// Move y into line-local coordinate space
		y -= heightAtLine(lineObj);
		var preparedMeasure = prepareMeasureForLine(cm, lineObj);
		// When directly calling `measureCharPrepared`, we have to adjust
		// for the widgets at this line.
		var widgetHeight$$1 = widgetTopHeight(lineObj);
		var begin = 0, end = lineObj.text.length, ltr = true;

		var order = getOrder(lineObj, cm.doc.direction);
		// If the line isn't plain left-to-right text, first figure out
		// which bidi section the coordinates fall into.
		if (order) {
			var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
									 (cm, lineObj, lineNo$$1, preparedMeasure, order, x, y);
			ltr = part.level != 1;
			// The awkward -1 offsets are needed because findFirst (called
			// on these below) will treat its first bound as inclusive,
			// second as exclusive, but we want to actually address the
			// characters in the part's range
			begin = ltr ? part.from : part.to - 1;
			end = ltr ? part.to : part.from - 1;
		}

		// A binary search to find the first character whose bounding box
		// starts after the coordinates. If we run across any whose box wrap
		// the coordinates, store that.
		var chAround = null, boxAround = null;
		var ch = findFirst(function (ch) {
			var box = measureCharPrepared(cm, preparedMeasure, ch);
			box.top += widgetHeight$$1; box.bottom += widgetHeight$$1;
			if (!boxIsAfter(box, x, y, false)) { return false }
			if (box.top <= y && box.left <= x) {
				chAround = ch;
				boxAround = box;
			}
			return true
		}, begin, end);

		var baseX, sticky, outside = false;
		// If a box around the coordinates was found, use that
		if (boxAround) {
			// Distinguish coordinates nearer to the left or right side of the box
			var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
			ch = chAround + (atStart ? 0 : 1);
			sticky = atStart ? "after" : "before";
			baseX = atLeft ? boxAround.left : boxAround.right;
		} else {
			// (Adjust for extended bound, if necessary.)
			if (!ltr && (ch == end || ch == begin)) { ch++; }
			// To determine which side to associate with, get the box to the
			// left of the character and compare it's vertical position to the
			// coordinates
			sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
				(measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight$$1 <= y) == ltr ?
				"after" : "before";
			// Now get accurate coordinates for this place, in order to get a
			// base X position
			var coords = cursorCoords(cm, Pos(lineNo$$1, ch, sticky), "line", lineObj, preparedMeasure);
			baseX = coords.left;
			outside = y < coords.top || y >= coords.bottom;
		}

		ch = skipExtendingChars(lineObj.text, ch, 1);
		return PosWithInfo(lineNo$$1, ch, sticky, outside, x - baseX)
	}

	function coordsBidiPart(cm, lineObj, lineNo$$1, preparedMeasure, order, x, y) {
		// Bidi parts are sorted left-to-right, and in a non-line-wrapping
		// situation, we can take this ordering to correspond to the visual
		// ordering. This finds the first part whose end is after the given
		// coordinates.
		var index = findFirst(function (i) {
			var part = order[i], ltr = part.level != 1;
			return boxIsAfter(cursorCoords(cm, Pos(lineNo$$1, ltr ? part.to : part.from, ltr ? "before" : "after"),
																		 "line", lineObj, preparedMeasure), x, y, true)
		}, 0, order.length - 1);
		var part = order[index];
		// If this isn't the first part, the part's start is also after
		// the coordinates, and the coordinates aren't on the same line as
		// that start, move one part back.
		if (index > 0) {
			var ltr = part.level != 1;
			var start = cursorCoords(cm, Pos(lineNo$$1, ltr ? part.from : part.to, ltr ? "after" : "before"),
															 "line", lineObj, preparedMeasure);
			if (boxIsAfter(start, x, y, true) && start.top > y)
				{ part = order[index - 1]; }
		}
		return part
	}

	function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
		// In a wrapped line, rtl text on wrapping boundaries can do things
		// that don't correspond to the ordering in our `order` array at
		// all, so a binary search doesn't work, and we want to return a
		// part that only spans one line so that the binary search in
		// coordsCharInner is safe. As such, we first find the extent of the
		// wrapped line, and then do a flat search in which we discard any
		// spans that aren't on the line.
		var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
		var begin = ref.begin;
		var end = ref.end;
		if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
		var part = null, closestDist = null;
		for (var i = 0; i < order.length; i++) {
			var p = order[i];
			if (p.from >= end || p.to <= begin) { continue }
			var ltr = p.level != 1;
			var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
			// Weigh against spans ending before this, so that they are only
			// picked if nothing ends after
			var dist = endX < x ? x - endX + 1e9 : endX - x;
			if (!part || closestDist > dist) {
				part = p;
				closestDist = dist;
			}
		}
		if (!part) { part = order[order.length - 1]; }
		// Clip the part to the wrapped line.
		if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
		if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
		return part
	}

	var measureText;
	// Compute the default text height.
	function textHeight(display) {
		if (display.cachedTextHeight != null) { return display.cachedTextHeight }
		if (measureText == null) {
			measureText = elt("pre");
			// Measure a bunch of lines, for browsers that compute
			// fractional heights.
			for (var i = 0; i < 49; ++i) {
				measureText.appendChild(document.createTextNode("x"));
				measureText.appendChild(elt("br"));
			}
			measureText.appendChild(document.createTextNode("x"));
		}
		removeChildrenAndAdd(display.measure, measureText);
		var height = measureText.offsetHeight / 50;
		if (height > 3) { display.cachedTextHeight = height; }
		removeChildren(display.measure);
		return height || 1
	}

	// Compute the default character width.
	function charWidth(display) {
		if (display.cachedCharWidth != null) { return display.cachedCharWidth }
		var anchor = elt("span", "xxxxxxxxxx");
		var pre = elt("pre", [anchor]);
		removeChildrenAndAdd(display.measure, pre);
		var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
		if (width > 2) { display.cachedCharWidth = width; }
		return width || 10
	}

	// Do a bulk-read of the DOM positions and sizes needed to draw the
	// view, so that we don't interleave reading and writing to the DOM.
	function getDimensions(cm) {
		var d = cm.display, left = {}, width = {};
		var gutterLeft = d.gutters.clientLeft;
		for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
			var id = cm.display.gutterSpecs[i].className;
			left[id] = n.offsetLeft + n.clientLeft + gutterLeft;
			width[id] = n.clientWidth;
		}
		return {fixedPos: compensateForHScroll(d),
						gutterTotalWidth: d.gutters.offsetWidth,
						gutterLeft: left,
						gutterWidth: width,
						wrapperWidth: d.wrapper.clientWidth}
	}

	// Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
	// but using getBoundingClientRect to get a sub-pixel-accurate
	// result.
	function compensateForHScroll(display) {
		return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
	}

	// Returns a function that estimates the height of a line, to use as
	// first approximation until the line becomes visible (and is thus
	// properly measurable).
	function estimateHeight(cm) {
		var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
		var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
		return function (line) {
			if (lineIsHidden(cm.doc, line)) { return 0 }

			var widgetsHeight = 0;
			if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
				if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
			} }

			if (wrapping)
				{ return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
			else
				{ return widgetsHeight + th }
		}
	}

	function estimateLineHeights(cm) {
		var doc = cm.doc, est = estimateHeight(cm);
		doc.iter(function (line) {
			var estHeight = est(line);
			if (estHeight != line.height) { updateLineHeight(line, estHeight); }
		});
	}

	// Given a mouse event, find the corresponding position. If liberal
	// is false, it checks whether a gutter or scrollbar was clicked,
	// and returns null if it was. forRect is used by rectangular
	// selections, and tries to estimate a character position even for
	// coordinates beyond the right of the text.
	function posFromMouse(cm, e, liberal, forRect) {
		var display = cm.display;
		if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }

		var x, y, space = display.lineSpace.getBoundingClientRect();
		// Fails unpredictably on IE[67] when mouse is dragged around quickly.
		try { x = e.clientX - space.left; y = e.clientY - space.top; }
		catch (e) { return null }
		var coords = coordsChar(cm, x, y), line;
		if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
			var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
			coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
		}
		return coords
	}

	// Find the view element corresponding to a given line. Return null
	// when the line isn't visible.
	function findViewIndex(cm, n) {
		if (n >= cm.display.viewTo) { return null }
		n -= cm.display.viewFrom;
		if (n < 0) { return null }
		var view = cm.display.view;
		for (var i = 0; i < view.length; i++) {
			n -= view[i].size;
			if (n < 0) { return i }
		}
	}

	// Updates the display.view data structure for a given change to the
	// document. From and to are in pre-change coordinates. Lendiff is
	// the amount of lines added or subtracted by the change. This is
	// used for changes that span multiple lines, or change the way
	// lines are divided into visual lines. regLineChange (below)
	// registers single-line changes.
	function regChange(cm, from, to, lendiff) {
		if (from == null) { from = cm.doc.first; }
		if (to == null) { to = cm.doc.first + cm.doc.size; }
		if (!lendiff) { lendiff = 0; }

		var display = cm.display;
		if (lendiff && to < display.viewTo &&
				(display.updateLineNumbers == null || display.updateLineNumbers > from))
			{ display.updateLineNumbers = from; }

		cm.curOp.viewChanged = true;

		if (from >= display.viewTo) { // Change after
			if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
				{ resetView(cm); }
		} else if (to <= display.viewFrom) { // Change before
			if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
				resetView(cm);
			} else {
				display.viewFrom += lendiff;
				display.viewTo += lendiff;
			}
		} else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
			resetView(cm);
		} else if (from <= display.viewFrom) { // Top overlap
			var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
			if (cut) {
				display.view = display.view.slice(cut.index);
				display.viewFrom = cut.lineN;
				display.viewTo += lendiff;
			} else {
				resetView(cm);
			}
		} else if (to >= display.viewTo) { // Bottom overlap
			var cut$1 = viewCuttingPoint(cm, from, from, -1);
			if (cut$1) {
				display.view = display.view.slice(0, cut$1.index);
				display.viewTo = cut$1.lineN;
			} else {
				resetView(cm);
			}
		} else { // Gap in the middle
			var cutTop = viewCuttingPoint(cm, from, from, -1);
			var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
			if (cutTop && cutBot) {
				display.view = display.view.slice(0, cutTop.index)
					.concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
					.concat(display.view.slice(cutBot.index));
				display.viewTo += lendiff;
			} else {
				resetView(cm);
			}
		}

		var ext = display.externalMeasured;
		if (ext) {
			if (to < ext.lineN)
				{ ext.lineN += lendiff; }
			else if (from < ext.lineN + ext.size)
				{ display.externalMeasured = null; }
		}
	}

	// Register a change to a single line. Type must be one of "text",
	// "gutter", "class", "widget"
	function regLineChange(cm, line, type) {
		cm.curOp.viewChanged = true;
		var display = cm.display, ext = cm.display.externalMeasured;
		if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
			{ display.externalMeasured = null; }

		if (line < display.viewFrom || line >= display.viewTo) { return }
		var lineView = display.view[findViewIndex(cm, line)];
		if (lineView.node == null) { return }
		var arr = lineView.changes || (lineView.changes = []);
		if (indexOf(arr, type) == -1) { arr.push(type); }
	}

	// Clear the view.
	function resetView(cm) {
		cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
		cm.display.view = [];
		cm.display.viewOffset = 0;
	}

	function viewCuttingPoint(cm, oldN, newN, dir) {
		var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
		if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
			{ return {index: index, lineN: newN} }
		var n = cm.display.viewFrom;
		for (var i = 0; i < index; i++)
			{ n += view[i].size; }
		if (n != oldN) {
			if (dir > 0) {
				if (index == view.length - 1) { return null }
				diff = (n + view[index].size) - oldN;
				index++;
			} else {
				diff = n - oldN;
			}
			oldN += diff; newN += diff;
		}
		while (visualLineNo(cm.doc, newN) != newN) {
			if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
			newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
			index += dir;
		}
		return {index: index, lineN: newN}
	}

	// Force the view to cover a given range, adding empty view element
	// or clipping off existing ones as needed.
	function adjustView(cm, from, to) {
		var display = cm.display, view = display.view;
		if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
			display.view = buildViewArray(cm, from, to);
			display.viewFrom = from;
		} else {
			if (display.viewFrom > from)
				{ display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
			else if (display.viewFrom < from)
				{ display.view = display.view.slice(findViewIndex(cm, from)); }
			display.viewFrom = from;
			if (display.viewTo < to)
				{ display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
			else if (display.viewTo > to)
				{ display.view = display.view.slice(0, findViewIndex(cm, to)); }
		}
		display.viewTo = to;
	}

	// Count the number of lines in the view whose DOM representation is
	// out of date (or nonexistent).
	function countDirtyView(cm) {
		var view = cm.display.view, dirty = 0;
		for (var i = 0; i < view.length; i++) {
			var lineView = view[i];
			if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
		}
		return dirty
	}

	function updateSelection(cm) {
		cm.display.input.showSelection(cm.display.input.prepareSelection());
	}

	function prepareSelection(cm, primary) {
		if ( primary === void 0 ) primary = true;

		var doc = cm.doc, result = {};
		var curFragment = result.cursors = document.createDocumentFragment();
		var selFragment = result.selection = document.createDocumentFragment();

		for (var i = 0; i < doc.sel.ranges.length; i++) {
			if (!primary && i == doc.sel.primIndex) { continue }
			var range$$1 = doc.sel.ranges[i];
			if (range$$1.from().line >= cm.display.viewTo || range$$1.to().line < cm.display.viewFrom) { continue }
			var collapsed = range$$1.empty();
			if (collapsed || cm.options.showCursorWhenSelecting)
				{ drawSelectionCursor(cm, range$$1.head, curFragment); }
			if (!collapsed)
				{ drawSelectionRange(cm, range$$1, selFragment); }
		}
		return result
	}

	// Draws a cursor for the given range
	function drawSelectionCursor(cm, head, output) {
		var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);

		var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
		cursor.style.left = pos.left + "px";
		cursor.style.top = pos.top + "px";
		cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";

		if (pos.other) {
			// Secondary cursor, shown when on a 'jump' in bi-directional text
			var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
			otherCursor.style.display = "";
			otherCursor.style.left = pos.other.left + "px";
			otherCursor.style.top = pos.other.top + "px";
			otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
		}
	}

	function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }

	// Draws the given range as a highlighted selection
	function drawSelectionRange(cm, range$$1, output) {
		var display = cm.display, doc = cm.doc;
		var fragment = document.createDocumentFragment();
		var padding = paddingH(cm.display), leftSide = padding.left;
		var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
		var docLTR = doc.direction == "ltr";

		function add(left, top, width, bottom) {
			if (top < 0) { top = 0; }
			top = Math.round(top);
			bottom = Math.round(bottom);
			fragment.appendChild(elt("div", null, "CodeMirror-selected", ("position: absolute; left: " + left + "px;\n                             top: " + top + "px; width: " + (width == null ? rightSide - left : width) + "px;\n                             height: " + (bottom - top) + "px")));
		}

		function drawForLine(line, fromArg, toArg) {
			var lineObj = getLine(doc, line);
			var lineLen = lineObj.text.length;
			var start, end;
			function coords(ch, bias) {
				return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
			}

			function wrapX(pos, dir, side) {
				var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
				var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
				var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
				return coords(ch, prop)[prop]
			}

			var order = getOrder(lineObj, doc.direction);
			iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
				var ltr = dir == "ltr";
				var fromPos = coords(from, ltr ? "left" : "right");
				var toPos = coords(to - 1, ltr ? "right" : "left");

				var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
				var first = i == 0, last = !order || i == order.length - 1;
				if (toPos.top - fromPos.top <= 3) { // Single line
					var openLeft = (docLTR ? openStart : openEnd) && first;
					var openRight = (docLTR ? openEnd : openStart) && last;
					var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
					var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
					add(left, fromPos.top, right - left, fromPos.bottom);
				} else { // Multiple lines
					var topLeft, topRight, botLeft, botRight;
					if (ltr) {
						topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
						topRight = docLTR ? rightSide : wrapX(from, dir, "before");
						botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
						botRight = docLTR && openEnd && last ? rightSide : toPos.right;
					} else {
						topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
						topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
						botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
						botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
					}
					add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
					if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
					add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
				}

				if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
				if (cmpCoords(toPos, start) < 0) { start = toPos; }
				if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
				if (cmpCoords(toPos, end) < 0) { end = toPos; }
			});
			return {start: start, end: end}
		}

		var sFrom = range$$1.from(), sTo = range$$1.to();
		if (sFrom.line == sTo.line) {
			drawForLine(sFrom.line, sFrom.ch, sTo.ch);
		} else {
			var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
			var singleVLine = visualLine(fromLine) == visualLine(toLine);
			var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
			var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
			if (singleVLine) {
				if (leftEnd.top < rightStart.top - 2) {
					add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
					add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
				} else {
					add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
				}
			}
			if (leftEnd.bottom < rightStart.top)
				{ add(leftSide, leftEnd.bottom, null, rightStart.top); }
		}

		output.appendChild(fragment);
	}

	// Cursor-blinking
	function restartBlink(cm) {
		if (!cm.state.focused) { return }
		var display = cm.display;
		clearInterval(display.blinker);
		var on = true;
		display.cursorDiv.style.visibility = "";
		if (cm.options.cursorBlinkRate > 0)
			{ display.blinker = setInterval(function () { return display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; },
				cm.options.cursorBlinkRate); }
		else if (cm.options.cursorBlinkRate < 0)
			{ display.cursorDiv.style.visibility = "hidden"; }
	}

	function ensureFocus(cm) {
		if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
	}

	function delayBlurEvent(cm) {
		cm.state.delayingBlurEvent = true;
		setTimeout(function () { if (cm.state.delayingBlurEvent) {
			cm.state.delayingBlurEvent = false;
			onBlur(cm);
		} }, 100);
	}

	function onFocus(cm, e) {
		if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; }

		if (cm.options.readOnly == "nocursor") { return }
		if (!cm.state.focused) {
			signal(cm, "focus", cm, e);
			cm.state.focused = true;
			addClass(cm.display.wrapper, "CodeMirror-focused");
			// This test prevents this from firing when a context
			// menu is closed (since the input reset would kill the
			// select-all detection hack)
			if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
				cm.display.input.reset();
				if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
			}
			cm.display.input.receivedFocus();
		}
		restartBlink(cm);
	}
	function onBlur(cm, e) {
		if (cm.state.delayingBlurEvent) { return }

		if (cm.state.focused) {
			signal(cm, "blur", cm, e);
			cm.state.focused = false;
			rmClass(cm.display.wrapper, "CodeMirror-focused");
		}
		clearInterval(cm.display.blinker);
		setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
	}

	// Read the actual heights of the rendered lines, and update their
	// stored heights to match.
	function updateHeightsInViewport(cm) {
		var display = cm.display;
		var prevBottom = display.lineDiv.offsetTop;
		for (var i = 0; i < display.view.length; i++) {
			var cur = display.view[i], wrapping = cm.options.lineWrapping;
			var height = (void 0), width = 0;
			if (cur.hidden) { continue }
			if (ie && ie_version < 8) {
				var bot = cur.node.offsetTop + cur.node.offsetHeight;
				height = bot - prevBottom;
				prevBottom = bot;
			} else {
				var box = cur.node.getBoundingClientRect();
				height = box.bottom - box.top;
				// Check that lines don't extend past the right of the current
				// editor width
				if (!wrapping && cur.text.firstChild)
					{ width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1; }
			}
			var diff = cur.line.height - height;
			if (diff > .005 || diff < -.005) {
				updateLineHeight(cur.line, height);
				updateWidgetHeight(cur.line);
				if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
					{ updateWidgetHeight(cur.rest[j]); } }
			}
			if (width > cm.display.sizerWidth) {
				var chWidth = Math.ceil(width / charWidth(cm.display));
				if (chWidth > cm.display.maxLineLength) {
					cm.display.maxLineLength = chWidth;
					cm.display.maxLine = cur.line;
					cm.display.maxLineChanged = true;
				}
			}
		}
	}

	// Read and store the height of line widgets associated with the
	// given line.
	function updateWidgetHeight(line) {
		if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
			var w = line.widgets[i], parent = w.node.parentNode;
			if (parent) { w.height = parent.offsetHeight; }
		} }
	}

	// Compute the lines that are visible in a given viewport (defaults
	// the the current scroll position). viewport may contain top,
	// height, and ensure (see op.scrollToPos) properties.
	function visibleLines(display, doc, viewport) {
		var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
		top = Math.floor(top - paddingTop(display));
		var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;

		var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
		// Ensure is a {from: {line, ch}, to: {line, ch}} object, and
		// forces those lines into the viewport (if possible).
		if (viewport && viewport.ensure) {
			var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
			if (ensureFrom < from) {
				from = ensureFrom;
				to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
			} else if (Math.min(ensureTo, doc.lastLine()) >= to) {
				from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
				to = ensureTo;
			}
		}
		return {from: from, to: Math.max(to, from + 1)}
	}

	// SCROLLING THINGS INTO VIEW

	// If an editor sits on the top or bottom of the window, partially
	// scrolled out of view, this ensures that the cursor is visible.
	function maybeScrollWindow(cm, rect) {
		if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }

		var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
		if (rect.top + box.top < 0) { doScroll = true; }
		else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
		if (doScroll != null && !phantom) {
			var scrollNode = elt("div", "\u200b", null, ("position: absolute;\n                         top: " + (rect.top - display.viewOffset - paddingTop(cm.display)) + "px;\n                         height: " + (rect.bottom - rect.top + scrollGap(cm) + display.barHeight) + "px;\n                         left: " + (rect.left) + "px; width: " + (Math.max(2, rect.right - rect.left)) + "px;"));
			cm.display.lineSpace.appendChild(scrollNode);
			scrollNode.scrollIntoView(doScroll);
			cm.display.lineSpace.removeChild(scrollNode);
		}
	}

	// Scroll a given position into view (immediately), verifying that
	// it actually became visible (as line heights are accurately
	// measured, the position of something may 'drift' during drawing).
	function scrollPosIntoView(cm, pos, end, margin) {
		if (margin == null) { margin = 0; }
		var rect;
		if (!cm.options.lineWrapping && pos == end) {
			// Set pos and end to the cursor positions around the character pos sticks to
			// If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
			// If pos == Pos(_, 0, "before"), pos and end are unchanged
			pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
			end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
		}
		for (var limit = 0; limit < 5; limit++) {
			var changed = false;
			var coords = cursorCoords(cm, pos);
			var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
			rect = {left: Math.min(coords.left, endCoords.left),
							top: Math.min(coords.top, endCoords.top) - margin,
							right: Math.max(coords.left, endCoords.left),
							bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
			var scrollPos = calculateScrollPos(cm, rect);
			var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
			if (scrollPos.scrollTop != null) {
				updateScrollTop(cm, scrollPos.scrollTop);
				if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
			}
			if (scrollPos.scrollLeft != null) {
				setScrollLeft(cm, scrollPos.scrollLeft);
				if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
			}
			if (!changed) { break }
		}
		return rect
	}

	// Scroll a given set of coordinates into view (immediately).
	function scrollIntoView(cm, rect) {
		var scrollPos = calculateScrollPos(cm, rect);
		if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
		if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
	}

	// Calculate a new scroll position needed to scroll the given
	// rectangle into view. Returns an object with scrollTop and
	// scrollLeft properties. When these are undefined, the
	// vertical/horizontal position does not need to be adjusted.
	function calculateScrollPos(cm, rect) {
		var display = cm.display, snapMargin = textHeight(cm.display);
		if (rect.top < 0) { rect.top = 0; }
		var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
		var screen = displayHeight(cm), result = {};
		if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
		var docBottom = cm.doc.height + paddingVert(display);
		var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
		if (rect.top < screentop) {
			result.scrollTop = atTop ? 0 : rect.top;
		} else if (rect.bottom > screentop + screen) {
			var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
			if (newTop != screentop) { result.scrollTop = newTop; }
		}

		var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
		var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
		var tooWide = rect.right - rect.left > screenw;
		if (tooWide) { rect.right = rect.left + screenw; }
		if (rect.left < 10)
			{ result.scrollLeft = 0; }
		else if (rect.left < screenleft)
			{ result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)); }
		else if (rect.right > screenw + screenleft - 3)
			{ result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
		return result
	}

	// Store a relative adjustment to the scroll position in the current
	// operation (to be applied when the operation finishes).
	function addToScrollTop(cm, top) {
		if (top == null) { return }
		resolveScrollToPos(cm);
		cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
	}

	// Make sure that at the end of the operation the current cursor is
	// shown.
	function ensureCursorVisible(cm) {
		resolveScrollToPos(cm);
		var cur = cm.getCursor();
		cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
	}

	function scrollToCoords(cm, x, y) {
		if (x != null || y != null) { resolveScrollToPos(cm); }
		if (x != null) { cm.curOp.scrollLeft = x; }
		if (y != null) { cm.curOp.scrollTop = y; }
	}

	function scrollToRange(cm, range$$1) {
		resolveScrollToPos(cm);
		cm.curOp.scrollToPos = range$$1;
	}

	// When an operation has its scrollToPos property set, and another
	// scroll action is applied before the end of the operation, this
	// 'simulates' scrolling that position into view in a cheap way, so
	// that the effect of intermediate scroll commands is not ignored.
	function resolveScrollToPos(cm) {
		var range$$1 = cm.curOp.scrollToPos;
		if (range$$1) {
			cm.curOp.scrollToPos = null;
			var from = estimateCoords(cm, range$$1.from), to = estimateCoords(cm, range$$1.to);
			scrollToCoordsRange(cm, from, to, range$$1.margin);
		}
	}

	function scrollToCoordsRange(cm, from, to, margin) {
		var sPos = calculateScrollPos(cm, {
			left: Math.min(from.left, to.left),
			top: Math.min(from.top, to.top) - margin,
			right: Math.max(from.right, to.right),
			bottom: Math.max(from.bottom, to.bottom) + margin
		});
		scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
	}

	// Sync the scrollable area and scrollbars, ensure the viewport
	// covers the visible area.
	function updateScrollTop(cm, val) {
		if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
		if (!gecko) { updateDisplaySimple(cm, {top: val}); }
		setScrollTop(cm, val, true);
		if (gecko) { updateDisplaySimple(cm); }
		startWorker(cm, 100);
	}

	function setScrollTop(cm, val, forceScroll) {
		val = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val);
		if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
		cm.doc.scrollTop = val;
		cm.display.scrollbars.setScrollTop(val);
		if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
	}

	// Sync scroller and scrollbar, ensure the gutter elements are
	// aligned.
	function setScrollLeft(cm, val, isScroller, forceScroll) {
		val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
		if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
		cm.doc.scrollLeft = val;
		alignHorizontally(cm);
		if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
		cm.display.scrollbars.setScrollLeft(val);
	}

	// SCROLLBARS

	// Prepare DOM reads needed to update the scrollbars. Done in one
	// shot to minimize update/measure roundtrips.
	function measureForScrollbars(cm) {
		var d = cm.display, gutterW = d.gutters.offsetWidth;
		var docH = Math.round(cm.doc.height + paddingVert(cm.display));
		return {
			clientHeight: d.scroller.clientHeight,
			viewHeight: d.wrapper.clientHeight,
			scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
			viewWidth: d.wrapper.clientWidth,
			barLeft: cm.options.fixedGutter ? gutterW : 0,
			docHeight: docH,
			scrollHeight: docH + scrollGap(cm) + d.barHeight,
			nativeBarWidth: d.nativeBarWidth,
			gutterWidth: gutterW
		}
	}

	var NativeScrollbars = function(place, scroll, cm) {
		this.cm = cm;
		var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
		var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
		vert.tabIndex = horiz.tabIndex = -1;
		place(vert); place(horiz);

		on(vert, "scroll", function () {
			if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
		});
		on(horiz, "scroll", function () {
			if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
		});

		this.checkedZeroWidth = false;
		// Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
		if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
	};

	NativeScrollbars.prototype.update = function (measure) {
		var needsH = measure.scrollWidth > measure.clientWidth + 1;
		var needsV = measure.scrollHeight > measure.clientHeight + 1;
		var sWidth = measure.nativeBarWidth;

		if (needsV) {
			this.vert.style.display = "block";
			this.vert.style.bottom = needsH ? sWidth + "px" : "0";
			var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
			// A bug in IE8 can cause this value to be negative, so guard it.
			this.vert.firstChild.style.height =
				Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
		} else {
			this.vert.style.display = "";
			this.vert.firstChild.style.height = "0";
		}

		if (needsH) {
			this.horiz.style.display = "block";
			this.horiz.style.right = needsV ? sWidth + "px" : "0";
			this.horiz.style.left = measure.barLeft + "px";
			var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
			this.horiz.firstChild.style.width =
				Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
		} else {
			this.horiz.style.display = "";
			this.horiz.firstChild.style.width = "0";
		}

		if (!this.checkedZeroWidth && measure.clientHeight > 0) {
			if (sWidth == 0) { this.zeroWidthHack(); }
			this.checkedZeroWidth = true;
		}

		return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
	};

	NativeScrollbars.prototype.setScrollLeft = function (pos) {
		if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
		if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
	};

	NativeScrollbars.prototype.setScrollTop = function (pos) {
		if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
		if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
	};

	NativeScrollbars.prototype.zeroWidthHack = function () {
		var w = mac && !mac_geMountainLion ? "12px" : "18px";
		this.horiz.style.height = this.vert.style.width = w;
		this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
		this.disableHoriz = new Delayed;
		this.disableVert = new Delayed;
	};

	NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
		bar.style.pointerEvents = "auto";
		function maybeDisable() {
			// To find out whether the scrollbar is still visible, we
			// check whether the element under the pixel in the bottom
			// right corner of the scrollbar box is the scrollbar box
			// itself (when the bar is still visible) or its filler child
			// (when the bar is hidden). If it is still visible, we keep
			// it enabled, if it's hidden, we disable pointer events.
			var box = bar.getBoundingClientRect();
			var elt$$1 = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
					: document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
			if (elt$$1 != bar) { bar.style.pointerEvents = "none"; }
			else { delay.set(1000, maybeDisable); }
		}
		delay.set(1000, maybeDisable);
	};

	NativeScrollbars.prototype.clear = function () {
		var parent = this.horiz.parentNode;
		parent.removeChild(this.horiz);
		parent.removeChild(this.vert);
	};

	var NullScrollbars = function () {};

	NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
	NullScrollbars.prototype.setScrollLeft = function () {};
	NullScrollbars.prototype.setScrollTop = function () {};
	NullScrollbars.prototype.clear = function () {};

	function updateScrollbars(cm, measure) {
		if (!measure) { measure = measureForScrollbars(cm); }
		var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
		updateScrollbarsInner(cm, measure);
		for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
			if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
				{ updateHeightsInViewport(cm); }
			updateScrollbarsInner(cm, measureForScrollbars(cm));
			startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
		}
	}

	// Re-synchronize the fake scrollbars with the actual size of the
	// content.
	function updateScrollbarsInner(cm, measure) {
		var d = cm.display;
		var sizes = d.scrollbars.update(measure);

		d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
		d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
		d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";

		if (sizes.right && sizes.bottom) {
			d.scrollbarFiller.style.display = "block";
			d.scrollbarFiller.style.height = sizes.bottom + "px";
			d.scrollbarFiller.style.width = sizes.right + "px";
		} else { d.scrollbarFiller.style.display = ""; }
		if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
			d.gutterFiller.style.display = "block";
			d.gutterFiller.style.height = sizes.bottom + "px";
			d.gutterFiller.style.width = measure.gutterWidth + "px";
		} else { d.gutterFiller.style.display = ""; }
	}

	var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};

	function initScrollbars(cm) {
		if (cm.display.scrollbars) {
			cm.display.scrollbars.clear();
			if (cm.display.scrollbars.addClass)
				{ rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
		}

		cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
			cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
			// Prevent clicks in the scrollbars from killing focus
			on(node, "mousedown", function () {
				if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
			});
			node.setAttribute("cm-not-content", "true");
		}, function (pos, axis) {
			if (axis == "horizontal") { setScrollLeft(cm, pos); }
			else { updateScrollTop(cm, pos); }
		}, cm);
		if (cm.display.scrollbars.addClass)
			{ addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
	}

	// Operations are used to wrap a series of changes to the editor
	// state in such a way that each change won't have to update the
	// cursor and display (which would be awkward, slow, and
	// error-prone). Instead, display updates are batched and then all
	// combined and executed at once.

	var nextOpId = 0;
	// Start a new operation.
	function startOperation(cm) {
		cm.curOp = {
			cm: cm,
			viewChanged: false,      // Flag that indicates that lines might need to be redrawn
			startHeight: cm.doc.height, // Used to detect need to update scrollbar
			forceUpdate: false,      // Used to force a redraw
			updateInput: 0,       // Whether to reset the input textarea
			typing: false,           // Whether this reset should be careful to leave existing text (for compositing)
			changeObjs: null,        // Accumulated changes, for firing change events
			cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
			cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
			selectionChanged: false, // Whether the selection needs to be redrawn
			updateMaxLine: false,    // Set when the widest line needs to be determined anew
			scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
			scrollToPos: null,       // Used to scroll to a specific position
			focus: false,
			id: ++nextOpId           // Unique ID
		};
		pushOperation(cm.curOp);
	}

	// Finish an operation, updating the display and signalling delayed events
	function endOperation(cm) {
		var op = cm.curOp;
		if (op) { finishOperation(op, function (group) {
			for (var i = 0; i < group.ops.length; i++)
				{ group.ops[i].cm.curOp = null; }
			endOperations(group);
		}); }
	}

	// The DOM updates done when an operation finishes are batched so
	// that the minimum number of relayouts are required.
	function endOperations(group) {
		var ops = group.ops;
		for (var i = 0; i < ops.length; i++) // Read DOM
			{ endOperation_R1(ops[i]); }
		for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
			{ endOperation_W1(ops[i$1]); }
		for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
			{ endOperation_R2(ops[i$2]); }
		for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
			{ endOperation_W2(ops[i$3]); }
		for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
			{ endOperation_finish(ops[i$4]); }
	}

	function endOperation_R1(op) {
		var cm = op.cm, display = cm.display;
		maybeClipScrollbars(cm);
		if (op.updateMaxLine) { findMaxLine(cm); }

		op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
			op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
												 op.scrollToPos.to.line >= display.viewTo) ||
			display.maxLineChanged && cm.options.lineWrapping;
		op.update = op.mustUpdate &&
			new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
	}

	function endOperation_W1(op) {
		op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
	}

	function endOperation_R2(op) {
		var cm = op.cm, display = cm.display;
		if (op.updatedDisplay) { updateHeightsInViewport(cm); }

		op.barMeasure = measureForScrollbars(cm);

		// If the max line changed since it was last measured, measure it,
		// and ensure the document's width matches it.
		// updateDisplay_W2 will use these properties to do the actual resizing
		if (display.maxLineChanged && !cm.options.lineWrapping) {
			op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
			cm.display.sizerWidth = op.adjustWidthTo;
			op.barMeasure.scrollWidth =
				Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
			op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
		}

		if (op.updatedDisplay || op.selectionChanged)
			{ op.preparedSelection = display.input.prepareSelection(); }
	}

	function endOperation_W2(op) {
		var cm = op.cm;

		if (op.adjustWidthTo != null) {
			cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
			if (op.maxScrollLeft < cm.doc.scrollLeft)
				{ setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
			cm.display.maxLineChanged = false;
		}

		var takeFocus = op.focus && op.focus == activeElt();
		if (op.preparedSelection)
			{ cm.display.input.showSelection(op.preparedSelection, takeFocus); }
		if (op.updatedDisplay || op.startHeight != cm.doc.height)
			{ updateScrollbars(cm, op.barMeasure); }
		if (op.updatedDisplay)
			{ setDocumentHeight(cm, op.barMeasure); }

		if (op.selectionChanged) { restartBlink(cm); }

		if (cm.state.focused && op.updateInput)
			{ cm.display.input.reset(op.typing); }
		if (takeFocus) { ensureFocus(op.cm); }
	}

	function endOperation_finish(op) {
		var cm = op.cm, display = cm.display, doc = cm.doc;

		if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }

		// Abort mouse wheel delta measurement, when scrolling explicitly
		if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
			{ display.wheelStartX = display.wheelStartY = null; }

		// Propagate the scroll position to the actual DOM scroller
		if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }

		if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
		// If we need to scroll a specific position into view, do so.
		if (op.scrollToPos) {
			var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
																	 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
			maybeScrollWindow(cm, rect);
		}

		// Fire events for markers that are hidden/unidden by editing or
		// undoing
		var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
		if (hidden) { for (var i = 0; i < hidden.length; ++i)
			{ if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
		if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
			{ if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }

		if (display.wrapper.offsetHeight)
			{ doc.scrollTop = cm.display.scroller.scrollTop; }

		// Fire change events, and delayed event handlers
		if (op.changeObjs)
			{ signal(cm, "changes", cm, op.changeObjs); }
		if (op.update)
			{ op.update.finish(); }
	}

	// Run the given function in an operation
	function runInOp(cm, f) {
		if (cm.curOp) { return f() }
		startOperation(cm);
		try { return f() }
		finally { endOperation(cm); }
	}
	// Wraps a function in an operation. Returns the wrapped function.
	function operation(cm, f) {
		return function() {
			if (cm.curOp) { return f.apply(cm, arguments) }
			startOperation(cm);
			try { return f.apply(cm, arguments) }
			finally { endOperation(cm); }
		}
	}
	// Used to add methods to editor and doc instances, wrapping them in
	// operations.
	function methodOp(f) {
		return function() {
			if (this.curOp) { return f.apply(this, arguments) }
			startOperation(this);
			try { return f.apply(this, arguments) }
			finally { endOperation(this); }
		}
	}
	function docMethodOp(f) {
		return function() {
			var cm = this.cm;
			if (!cm || cm.curOp) { return f.apply(this, arguments) }
			startOperation(cm);
			try { return f.apply(this, arguments) }
			finally { endOperation(cm); }
		}
	}

	// HIGHLIGHT WORKER

	function startWorker(cm, time) {
		if (cm.doc.highlightFrontier < cm.display.viewTo)
			{ cm.state.highlight.set(time, bind(highlightWorker, cm)); }
	}

	function highlightWorker(cm) {
		var doc = cm.doc;
		if (doc.highlightFrontier >= cm.display.viewTo) { return }
		var end = +new Date + cm.options.workTime;
		var context = getContextBefore(cm, doc.highlightFrontier);
		var changedLines = [];

		doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
			if (context.line >= cm.display.viewFrom) { // Visible
				var oldStyles = line.styles;
				var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
				var highlighted = highlightLine(cm, line, context, true);
				if (resetState) { context.state = resetState; }
				line.styles = highlighted.styles;
				var oldCls = line.styleClasses, newCls = highlighted.classes;
				if (newCls) { line.styleClasses = newCls; }
				else if (oldCls) { line.styleClasses = null; }
				var ischange = !oldStyles || oldStyles.length != line.styles.length ||
					oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
				for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
				if (ischange) { changedLines.push(context.line); }
				line.stateAfter = context.save();
				context.nextLine();
			} else {
				if (line.text.length <= cm.options.maxHighlightLength)
					{ processLine(cm, line.text, context); }
				line.stateAfter = context.line % 5 == 0 ? context.save() : null;
				context.nextLine();
			}
			if (+new Date > end) {
				startWorker(cm, cm.options.workDelay);
				return true
			}
		});
		doc.highlightFrontier = context.line;
		doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
		if (changedLines.length) { runInOp(cm, function () {
			for (var i = 0; i < changedLines.length; i++)
				{ regLineChange(cm, changedLines[i], "text"); }
		}); }
	}

	// DISPLAY DRAWING

	var DisplayUpdate = function(cm, viewport, force) {
		var display = cm.display;

		this.viewport = viewport;
		// Store some values that we'll need later (but don't want to force a relayout for)
		this.visible = visibleLines(display, cm.doc, viewport);
		this.editorIsHidden = !display.wrapper.offsetWidth;
		this.wrapperHeight = display.wrapper.clientHeight;
		this.wrapperWidth = display.wrapper.clientWidth;
		this.oldDisplayWidth = displayWidth(cm);
		this.force = force;
		this.dims = getDimensions(cm);
		this.events = [];
	};

	DisplayUpdate.prototype.signal = function (emitter, type) {
		if (hasHandler(emitter, type))
			{ this.events.push(arguments); }
	};
	DisplayUpdate.prototype.finish = function () {
			var this$1 = this;

		for (var i = 0; i < this.events.length; i++)
			{ signal.apply(null, this$1.events[i]); }
	};

	function maybeClipScrollbars(cm) {
		var display = cm.display;
		if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
			display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
			display.heightForcer.style.height = scrollGap(cm) + "px";
			display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
			display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
			display.scrollbarsClipped = true;
		}
	}

	function selectionSnapshot(cm) {
		if (cm.hasFocus()) { return null }
		var active = activeElt();
		if (!active || !contains(cm.display.lineDiv, active)) { return null }
		var result = {activeElt: active};
		if (window.getSelection) {
			var sel = window.getSelection();
			if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
				result.anchorNode = sel.anchorNode;
				result.anchorOffset = sel.anchorOffset;
				result.focusNode = sel.focusNode;
				result.focusOffset = sel.focusOffset;
			}
		}
		return result
	}

	function restoreSelection(snapshot) {
		if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
		snapshot.activeElt.focus();
		if (snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
			var sel = window.getSelection(), range$$1 = document.createRange();
			range$$1.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
			range$$1.collapse(false);
			sel.removeAllRanges();
			sel.addRange(range$$1);
			sel.extend(snapshot.focusNode, snapshot.focusOffset);
		}
	}

	// Does the actual updating of the line display. Bails out
	// (returning false) when there is nothing to be done and forced is
	// false.
	function updateDisplayIfNeeded(cm, update) {
		var display = cm.display, doc = cm.doc;

		if (update.editorIsHidden) {
			resetView(cm);
			return false
		}

		// Bail out if the visible area is already rendered and nothing changed.
		if (!update.force &&
				update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
				(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
				display.renderedView == display.view && countDirtyView(cm) == 0)
			{ return false }

		if (maybeUpdateLineNumberWidth(cm)) {
			resetView(cm);
			update.dims = getDimensions(cm);
		}

		// Compute a suitable new viewport (from & to)
		var end = doc.first + doc.size;
		var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
		var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
		if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
		if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
		if (sawCollapsedSpans) {
			from = visualLineNo(cm.doc, from);
			to = visualLineEndNo(cm.doc, to);
		}

		var different = from != display.viewFrom || to != display.viewTo ||
			display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
		adjustView(cm, from, to);

		display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
		// Position the mover div to align with the current scroll position
		cm.display.mover.style.top = display.viewOffset + "px";

		var toUpdate = countDirtyView(cm);
		if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
				(display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
			{ return false }

		// For big changes, we hide the enclosing element during the
		// update, since that speeds up the operations on most browsers.
		var selSnapshot = selectionSnapshot(cm);
		if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
		patchDisplay(cm, display.updateLineNumbers, update.dims);
		if (toUpdate > 4) { display.lineDiv.style.display = ""; }
		display.renderedView = display.view;
		// There might have been a widget with a focused element that got
		// hidden or updated, if so re-focus it.
		restoreSelection(selSnapshot);

		// Prevent selection and cursors from interfering with the scroll
		// width and height.
		removeChildren(display.cursorDiv);
		removeChildren(display.selectionDiv);
		display.gutters.style.height = display.sizer.style.minHeight = 0;

		if (different) {
			display.lastWrapHeight = update.wrapperHeight;
			display.lastWrapWidth = update.wrapperWidth;
			startWorker(cm, 400);
		}

		display.updateLineNumbers = null;

		return true
	}

	function postUpdateDisplay(cm, update) {
		var viewport = update.viewport;

		for (var first = true;; first = false) {
			if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
				// Clip forced viewport to actual scrollable area.
				if (viewport && viewport.top != null)
					{ viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
				// Updated line heights might result in the drawn area not
				// actually covering the viewport. Keep looping until it does.
				update.visible = visibleLines(cm.display, cm.doc, viewport);
				if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
					{ break }
			}
			if (!updateDisplayIfNeeded(cm, update)) { break }
			updateHeightsInViewport(cm);
			var barMeasure = measureForScrollbars(cm);
			updateSelection(cm);
			updateScrollbars(cm, barMeasure);
			setDocumentHeight(cm, barMeasure);
			update.force = false;
		}

		update.signal(cm, "update", cm);
		if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
			update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
			cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
		}
	}

	function updateDisplaySimple(cm, viewport) {
		var update = new DisplayUpdate(cm, viewport);
		if (updateDisplayIfNeeded(cm, update)) {
			updateHeightsInViewport(cm);
			postUpdateDisplay(cm, update);
			var barMeasure = measureForScrollbars(cm);
			updateSelection(cm);
			updateScrollbars(cm, barMeasure);
			setDocumentHeight(cm, barMeasure);
			update.finish();
		}
	}

	// Sync the actual display DOM structure with display.view, removing
	// nodes for lines that are no longer in view, and creating the ones
	// that are not there yet, and updating the ones that are out of
	// date.
	function patchDisplay(cm, updateNumbersFrom, dims) {
		var display = cm.display, lineNumbers = cm.options.lineNumbers;
		var container = display.lineDiv, cur = container.firstChild;

		function rm(node) {
			var next = node.nextSibling;
			// Works around a throw-scroll bug in OS X Webkit
			if (webkit && mac && cm.display.currentWheelTarget == node)
				{ node.style.display = "none"; }
			else
				{ node.parentNode.removeChild(node); }
			return next
		}

		var view = display.view, lineN = display.viewFrom;
		// Loop over the elements in the view, syncing cur (the DOM nodes
		// in display.lineDiv) with the view as we go.
		for (var i = 0; i < view.length; i++) {
			var lineView = view[i];
			if (lineView.hidden) ; else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
				var node = buildLineElement(cm, lineView, lineN, dims);
				container.insertBefore(node, cur);
			} else { // Already drawn
				while (cur != lineView.node) { cur = rm(cur); }
				var updateNumber = lineNumbers && updateNumbersFrom != null &&
					updateNumbersFrom <= lineN && lineView.lineNumber;
				if (lineView.changes) {
					if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
					updateLineForChanges(cm, lineView, lineN, dims);
				}
				if (updateNumber) {
					removeChildren(lineView.lineNumber);
					lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
				}
				cur = lineView.node.nextSibling;
			}
			lineN += lineView.size;
		}
		while (cur) { cur = rm(cur); }
	}

	function updateGutterSpace(display) {
		var width = display.gutters.offsetWidth;
		display.sizer.style.marginLeft = width + "px";
	}

	function setDocumentHeight(cm, measure) {
		cm.display.sizer.style.minHeight = measure.docHeight + "px";
		cm.display.heightForcer.style.top = measure.docHeight + "px";
		cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
	}

	// Re-align line numbers and gutter marks to compensate for
	// horizontal scrolling.
	function alignHorizontally(cm) {
		var display = cm.display, view = display.view;
		if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
		var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
		var gutterW = display.gutters.offsetWidth, left = comp + "px";
		for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
			if (cm.options.fixedGutter) {
				if (view[i].gutter)
					{ view[i].gutter.style.left = left; }
				if (view[i].gutterBackground)
					{ view[i].gutterBackground.style.left = left; }
			}
			var align = view[i].alignable;
			if (align) { for (var j = 0; j < align.length; j++)
				{ align[j].style.left = left; } }
		} }
		if (cm.options.fixedGutter)
			{ display.gutters.style.left = (comp + gutterW) + "px"; }
	}

	// Used to ensure that the line number gutter is still the right
	// size for the current document size. Returns true when an update
	// is needed.
	function maybeUpdateLineNumberWidth(cm) {
		if (!cm.options.lineNumbers) { return false }
		var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
		if (last.length != display.lineNumChars) {
			var test = display.measure.appendChild(elt("div", [elt("div", last)],
																								 "CodeMirror-linenumber CodeMirror-gutter-elt"));
			var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
			display.lineGutter.style.width = "";
			display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
			display.lineNumWidth = display.lineNumInnerWidth + padding;
			display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
			display.lineGutter.style.width = display.lineNumWidth + "px";
			updateGutterSpace(cm.display);
			return true
		}
		return false
	}

	function getGutters(gutters, lineNumbers) {
		var result = [], sawLineNumbers = false;
		for (var i = 0; i < gutters.length; i++) {
			var name = gutters[i], style = null;
			if (typeof name != "string") { style = name.style; name = name.className; }
			if (name == "CodeMirror-linenumbers") {
				if (!lineNumbers) { continue }
				else { sawLineNumbers = true; }
			}
			result.push({className: name, style: style});
		}
		if (lineNumbers && !sawLineNumbers) { result.push({className: "CodeMirror-linenumbers", style: null}); }
		return result
	}

	// Rebuild the gutter elements, ensure the margin to the left of the
	// code matches their width.
	function renderGutters(display) {
		var gutters = display.gutters, specs = display.gutterSpecs;
		removeChildren(gutters);
		display.lineGutter = null;
		for (var i = 0; i < specs.length; ++i) {
			var ref = specs[i];
			var className = ref.className;
			var style = ref.style;
			var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + className));
			if (style) { gElt.style.cssText = style; }
			if (className == "CodeMirror-linenumbers") {
				display.lineGutter = gElt;
				gElt.style.width = (display.lineNumWidth || 1) + "px";
			}
		}
		gutters.style.display = specs.length ? "" : "none";
		updateGutterSpace(display);
	}

	function updateGutters(cm) {
		renderGutters(cm.display);
		regChange(cm);
		alignHorizontally(cm);
	}

	// The display handles the DOM integration, both for input reading
	// and content drawing. It holds references to DOM nodes and
	// display-related state.

	function Display(place, doc, input, options) {
		var d = this;
		this.input = input;

		// Covers bottom-right square when both scrollbars are present.
		d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
		d.scrollbarFiller.setAttribute("cm-not-content", "true");
		// Covers bottom of gutter when coverGutterNextToScrollbar is on
		// and h scrollbar is present.
		d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
		d.gutterFiller.setAttribute("cm-not-content", "true");
		// Will contain the actual code, positioned to cover the viewport.
		d.lineDiv = eltP("div", null, "CodeMirror-code");
		// Elements are added to these to represent selection and cursors.
		d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
		d.cursorDiv = elt("div", null, "CodeMirror-cursors");
		// A visibility: hidden element used to find the size of things.
		d.measure = elt("div", null, "CodeMirror-measure");
		// When lines outside of the viewport are measured, they are drawn in this.
		d.lineMeasure = elt("div", null, "CodeMirror-measure");
		// Wraps everything that needs to exist inside the vertically-padded coordinate system
		d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
											null, "position: relative; outline: none");
		var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
		// Moved around its parent to cover visible view.
		d.mover = elt("div", [lines], null, "position: relative");
		// Set to the height of the document, allowing scrolling.
		d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
		d.sizerWidth = null;
		// Behavior of elts with overflow: auto and padding is
		// inconsistent across browsers. This is used to ensure the
		// scrollable area is big enough.
		d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
		// Will contain the gutters, if any.
		d.gutters = elt("div", null, "CodeMirror-gutters");
		d.lineGutter = null;
		// Actual scrollable element.
		d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
		d.scroller.setAttribute("tabIndex", "-1");
		// The element in which the editor lives.
		d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");

		// Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
		if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
		if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }

		if (place) {
			if (place.appendChild) { place.appendChild(d.wrapper); }
			else { place(d.wrapper); }
		}

		// Current rendered range (may be bigger than the view window).
		d.viewFrom = d.viewTo = doc.first;
		d.reportedViewFrom = d.reportedViewTo = doc.first;
		// Information about the rendered lines.
		d.view = [];
		d.renderedView = null;
		// Holds info about a single rendered line when it was rendered
		// for measurement, while not in view.
		d.externalMeasured = null;
		// Empty space (in pixels) above the view
		d.viewOffset = 0;
		d.lastWrapHeight = d.lastWrapWidth = 0;
		d.updateLineNumbers = null;

		d.nativeBarWidth = d.barHeight = d.barWidth = 0;
		d.scrollbarsClipped = false;

		// Used to only resize the line number gutter when necessary (when
		// the amount of lines crosses a boundary that makes its width change)
		d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
		// Set to true when a non-horizontal-scrolling line widget is
		// added. As an optimization, line widget aligning is skipped when
		// this is false.
		d.alignWidgets = false;

		d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;

		// Tracks the maximum line length so that the horizontal scrollbar
		// can be kept static when scrolling.
		d.maxLine = null;
		d.maxLineLength = 0;
		d.maxLineChanged = false;

		// Used for measuring wheel scrolling granularity
		d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;

		// True when shift is held down.
		d.shift = false;

		// Used to track whether anything happened since the context menu
		// was opened.
		d.selForContextMenu = null;

		d.activeTouch = null;

		d.gutterSpecs = getGutters(options.gutters, options.lineNumbers);
		renderGutters(d);

		input.init(d);
	}

	// Since the delta values reported on mouse wheel events are
	// unstandardized between browsers and even browser versions, and
	// generally horribly unpredictable, this code starts by measuring
	// the scroll effect that the first few mouse wheel events have,
	// and, from that, detects the way it can convert deltas to pixel
	// offsets afterwards.
	//
	// The reason we want to know the amount a wheel event will scroll
	// is that it gives us a chance to update the display before the
	// actual scrolling happens, reducing flickering.

	var wheelSamples = 0, wheelPixelsPerUnit = null;
	// Fill in a browser-detected starting value on browsers where we
	// know one. These don't have to be accurate -- the result of them
	// being wrong would just be a slight flicker on the first wheel
	// scroll (if it is large enough).
	if (ie) { wheelPixelsPerUnit = -.53; }
	else if (gecko) { wheelPixelsPerUnit = 15; }
	else if (chrome) { wheelPixelsPerUnit = -.7; }
	else if (safari) { wheelPixelsPerUnit = -1/3; }

	function wheelEventDelta(e) {
		var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
		if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
		if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
		else if (dy == null) { dy = e.wheelDelta; }
		return {x: dx, y: dy}
	}
	function wheelEventPixels(e) {
		var delta = wheelEventDelta(e);
		delta.x *= wheelPixelsPerUnit;
		delta.y *= wheelPixelsPerUnit;
		return delta
	}

	function onScrollWheel(cm, e) {
		var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;

		var display = cm.display, scroll = display.scroller;
		// Quit if there's nothing to scroll here
		var canScrollX = scroll.scrollWidth > scroll.clientWidth;
		var canScrollY = scroll.scrollHeight > scroll.clientHeight;
		if (!(dx && canScrollX || dy && canScrollY)) { return }

		// Webkit browsers on OS X abort momentum scrolls when the target
		// of the scroll event is removed from the scrollable element.
		// This hack (see related code in patchDisplay) makes sure the
		// element is kept around.
		if (dy && mac && webkit) {
			outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
				for (var i = 0; i < view.length; i++) {
					if (view[i].node == cur) {
						cm.display.currentWheelTarget = cur;
						break outer
					}
				}
			}
		}

		// On some browsers, horizontal scrolling will cause redraws to
		// happen before the gutter has been realigned, causing it to
		// wriggle around in a most unseemly way. When we have an
		// estimated pixels/delta value, we just handle horizontal
		// scrolling entirely here. It'll be slightly off from native, but
		// better than glitching out.
		if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
			if (dy && canScrollY)
				{ updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
			setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
			// Only prevent default scrolling if vertical scrolling is
			// actually possible. Otherwise, it causes vertical scroll
			// jitter on OSX trackpads when deltaX is small and deltaY
			// is large (issue #3579)
			if (!dy || (dy && canScrollY))
				{ e_preventDefault(e); }
			display.wheelStartX = null; // Abort measurement, if in progress
			return
		}

		// 'Project' the visible viewport to cover the area that is being
		// scrolled into view (if we know enough to estimate it).
		if (dy && wheelPixelsPerUnit != null) {
			var pixels = dy * wheelPixelsPerUnit;
			var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
			if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
			else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
			updateDisplaySimple(cm, {top: top, bottom: bot});
		}

		if (wheelSamples < 20) {
			if (display.wheelStartX == null) {
				display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
				display.wheelDX = dx; display.wheelDY = dy;
				setTimeout(function () {
					if (display.wheelStartX == null) { return }
					var movedX = scroll.scrollLeft - display.wheelStartX;
					var movedY = scroll.scrollTop - display.wheelStartY;
					var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
						(movedX && display.wheelDX && movedX / display.wheelDX);
					display.wheelStartX = display.wheelStartY = null;
					if (!sample) { return }
					wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
					++wheelSamples;
				}, 200);
			} else {
				display.wheelDX += dx; display.wheelDY += dy;
			}
		}
	}

	// Selection objects are immutable. A new one is created every time
	// the selection changes. A selection is one or more non-overlapping
	// (and non-touching) ranges, sorted, and an integer that indicates
	// which one is the primary selection (the one that's scrolled into
	// view, that getCursor returns, etc).
	var Selection = function(ranges, primIndex) {
		this.ranges = ranges;
		this.primIndex = primIndex;
	};

	Selection.prototype.primary = function () { return this.ranges[this.primIndex] };

	Selection.prototype.equals = function (other) {
			var this$1 = this;

		if (other == this) { return true }
		if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
		for (var i = 0; i < this.ranges.length; i++) {
			var here = this$1.ranges[i], there = other.ranges[i];
			if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
		}
		return true
	};

	Selection.prototype.deepCopy = function () {
			var this$1 = this;

		var out = [];
		for (var i = 0; i < this.ranges.length; i++)
			{ out[i] = new Range(copyPos(this$1.ranges[i].anchor), copyPos(this$1.ranges[i].head)); }
		return new Selection(out, this.primIndex)
	};

	Selection.prototype.somethingSelected = function () {
			var this$1 = this;

		for (var i = 0; i < this.ranges.length; i++)
			{ if (!this$1.ranges[i].empty()) { return true } }
		return false
	};

	Selection.prototype.contains = function (pos, end) {
			var this$1 = this;

		if (!end) { end = pos; }
		for (var i = 0; i < this.ranges.length; i++) {
			var range = this$1.ranges[i];
			if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
				{ return i }
		}
		return -1
	};

	var Range = function(anchor, head) {
		this.anchor = anchor; this.head = head;
	};

	Range.prototype.from = function () { return minPos(this.anchor, this.head) };
	Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
	Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };

	// Take an unsorted, potentially overlapping set of ranges, and
	// build a selection out of it. 'Consumes' ranges array (modifying
	// it).
	function normalizeSelection(cm, ranges, primIndex) {
		var mayTouch = cm && cm.options.selectionsMayTouch;
		var prim = ranges[primIndex];
		ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
		primIndex = indexOf(ranges, prim);
		for (var i = 1; i < ranges.length; i++) {
			var cur = ranges[i], prev = ranges[i - 1];
			var diff = cmp(prev.to(), cur.from());
			if (mayTouch && !cur.empty() ? diff > 0 : diff >= 0) {
				var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
				var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
				if (i <= primIndex) { --primIndex; }
				ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
			}
		}
		return new Selection(ranges, primIndex)
	}

	function simpleSelection(anchor, head) {
		return new Selection([new Range(anchor, head || anchor)], 0)
	}

	// Compute the position of the end of a change (its 'to' property
	// refers to the pre-change end).
	function changeEnd(change) {
		if (!change.text) { return change.to }
		return Pos(change.from.line + change.text.length - 1,
							 lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
	}

	// Adjust a position to refer to the post-change position of the
	// same text, or the end of the change if the change covers it.
	function adjustForChange(pos, change) {
		if (cmp(pos, change.from) < 0) { return pos }
		if (cmp(pos, change.to) <= 0) { return changeEnd(change) }

		var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
		if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
		return Pos(line, ch)
	}

	function computeSelAfterChange(doc, change) {
		var out = [];
		for (var i = 0; i < doc.sel.ranges.length; i++) {
			var range = doc.sel.ranges[i];
			out.push(new Range(adjustForChange(range.anchor, change),
												 adjustForChange(range.head, change)));
		}
		return normalizeSelection(doc.cm, out, doc.sel.primIndex)
	}

	function offsetPos(pos, old, nw) {
		if (pos.line == old.line)
			{ return Pos(nw.line, pos.ch - old.ch + nw.ch) }
		else
			{ return Pos(nw.line + (pos.line - old.line), pos.ch) }
	}

	// Used by replaceSelections to allow moving the selection to the
	// start or around the replaced test. Hint may be "start" or "around".
	function computeReplacedSel(doc, changes, hint) {
		var out = [];
		var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
		for (var i = 0; i < changes.length; i++) {
			var change = changes[i];
			var from = offsetPos(change.from, oldPrev, newPrev);
			var to = offsetPos(changeEnd(change), oldPrev, newPrev);
			oldPrev = change.to;
			newPrev = to;
			if (hint == "around") {
				var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
				out[i] = new Range(inv ? to : from, inv ? from : to);
			} else {
				out[i] = new Range(from, from);
			}
		}
		return new Selection(out, doc.sel.primIndex)
	}

	// Used to get the editor into a consistent state again when options change.

	function loadMode(cm) {
		cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
		resetModeState(cm);
	}

	function resetModeState(cm) {
		cm.doc.iter(function (line) {
			if (line.stateAfter) { line.stateAfter = null; }
			if (line.styles) { line.styles = null; }
		});
		cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
		startWorker(cm, 100);
		cm.state.modeGen++;
		if (cm.curOp) { regChange(cm); }
	}

	// DOCUMENT DATA STRUCTURE

	// By default, updates that start and end at the beginning of a line
	// are treated specially, in order to make the association of line
	// widgets and marker elements with the text behave more intuitive.
	function isWholeLineUpdate(doc, change) {
		return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
			(!doc.cm || doc.cm.options.wholeLineUpdateBefore)
	}

	// Perform a change on the document data structure.
	function updateDoc(doc, change, markedSpans, estimateHeight$$1) {
		function spansFor(n) {return markedSpans ? markedSpans[n] : null}
		function update(line, text, spans) {
			updateLine(line, text, spans, estimateHeight$$1);
			signalLater(line, "change", line, change);
		}
		function linesFor(start, end) {
			var result = [];
			for (var i = start; i < end; ++i)
				{ result.push(new Line(text[i], spansFor(i), estimateHeight$$1)); }
			return result
		}

		var from = change.from, to = change.to, text = change.text;
		var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
		var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;

		// Adjust the line structure
		if (change.full) {
			doc.insert(0, linesFor(0, text.length));
			doc.remove(text.length, doc.size - text.length);
		} else if (isWholeLineUpdate(doc, change)) {
			// This is a whole-line replace. Treated specially to make
			// sure line objects move the way they are supposed to.
			var added = linesFor(0, text.length - 1);
			update(lastLine, lastLine.text, lastSpans);
			if (nlines) { doc.remove(from.line, nlines); }
			if (added.length) { doc.insert(from.line, added); }
		} else if (firstLine == lastLine) {
			if (text.length == 1) {
				update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
			} else {
				var added$1 = linesFor(1, text.length - 1);
				added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight$$1));
				update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
				doc.insert(from.line + 1, added$1);
			}
		} else if (text.length == 1) {
			update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
			doc.remove(from.line + 1, nlines);
		} else {
			update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
			update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
			var added$2 = linesFor(1, text.length - 1);
			if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
			doc.insert(from.line + 1, added$2);
		}

		signalLater(doc, "change", doc, change);
	}

	// Call f for all linked documents.
	function linkedDocs(doc, f, sharedHistOnly) {
		function propagate(doc, skip, sharedHist) {
			if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
				var rel = doc.linked[i];
				if (rel.doc == skip) { continue }
				var shared = sharedHist && rel.sharedHist;
				if (sharedHistOnly && !shared) { continue }
				f(rel.doc, shared);
				propagate(rel.doc, doc, shared);
			} }
		}
		propagate(doc, null, true);
	}

	// Attach a document to an editor.
	function attachDoc(cm, doc) {
		if (doc.cm) { throw new Error("This document is already in use.") }
		cm.doc = doc;
		doc.cm = cm;
		estimateLineHeights(cm);
		loadMode(cm);
		setDirectionClass(cm);
		if (!cm.options.lineWrapping) { findMaxLine(cm); }
		cm.options.mode = doc.modeOption;
		regChange(cm);
	}

	function setDirectionClass(cm) {
	(cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
	}

	function directionChanged(cm) {
		runInOp(cm, function () {
			setDirectionClass(cm);
			regChange(cm);
		});
	}

	function History(startGen) {
		// Arrays of change events and selections. Doing something adds an
		// event to done and clears undo. Undoing moves events from done
		// to undone, redoing moves them in the other direction.
		this.done = []; this.undone = [];
		this.undoDepth = Infinity;
		// Used to track when changes can be merged into a single undo
		// event
		this.lastModTime = this.lastSelTime = 0;
		this.lastOp = this.lastSelOp = null;
		this.lastOrigin = this.lastSelOrigin = null;
		// Used by the isClean() method
		this.generation = this.maxGeneration = startGen || 1;
	}

	// Create a history change event from an updateDoc-style change
	// object.
	function historyChangeFromChange(doc, change) {
		var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
		attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
		linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
		return histChange
	}

	// Pop all selection events off the end of a history array. Stop at
	// a change event.
	function clearSelectionEvents(array) {
		while (array.length) {
			var last = lst(array);
			if (last.ranges) { array.pop(); }
			else { break }
		}
	}

	// Find the top change event in the history. Pop off selection
	// events that are in the way.
	function lastChangeEvent(hist, force) {
		if (force) {
			clearSelectionEvents(hist.done);
			return lst(hist.done)
		} else if (hist.done.length && !lst(hist.done).ranges) {
			return lst(hist.done)
		} else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
			hist.done.pop();
			return lst(hist.done)
		}
	}

	// Register a change in the history. Merges changes that are within
	// a single operation, or are close together with an origin that
	// allows merging (starting with "+") into a single event.
	function addChangeToHistory(doc, change, selAfter, opId) {
		var hist = doc.history;
		hist.undone.length = 0;
		var time = +new Date, cur;
		var last;

		if ((hist.lastOp == opId ||
				 hist.lastOrigin == change.origin && change.origin &&
				 ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
					change.origin.charAt(0) == "*")) &&
				(cur = lastChangeEvent(hist, hist.lastOp == opId))) {
			// Merge this change into the last event
			last = lst(cur.changes);
			if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
				// Optimized case for simple insertion -- don't want to add
				// new changesets for every character typed
				last.to = changeEnd(change);
			} else {
				// Add new sub-event
				cur.changes.push(historyChangeFromChange(doc, change));
			}
		} else {
			// Can not be merged, start a new event.
			var before = lst(hist.done);
			if (!before || !before.ranges)
				{ pushSelectionToHistory(doc.sel, hist.done); }
			cur = {changes: [historyChangeFromChange(doc, change)],
						 generation: hist.generation};
			hist.done.push(cur);
			while (hist.done.length > hist.undoDepth) {
				hist.done.shift();
				if (!hist.done[0].ranges) { hist.done.shift(); }
			}
		}
		hist.done.push(selAfter);
		hist.generation = ++hist.maxGeneration;
		hist.lastModTime = hist.lastSelTime = time;
		hist.lastOp = hist.lastSelOp = opId;
		hist.lastOrigin = hist.lastSelOrigin = change.origin;

		if (!last) { signal(doc, "historyAdded"); }
	}

	function selectionEventCanBeMerged(doc, origin, prev, sel) {
		var ch = origin.charAt(0);
		return ch == "*" ||
			ch == "+" &&
			prev.ranges.length == sel.ranges.length &&
			prev.somethingSelected() == sel.somethingSelected() &&
			new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
	}

	// Called whenever the selection changes, sets the new selection as
	// the pending selection in the history, and pushes the old pending
	// selection into the 'done' array when it was significantly
	// different (in number of selected ranges, emptiness, or time).
	function addSelectionToHistory(doc, sel, opId, options) {
		var hist = doc.history, origin = options && options.origin;

		// A new event is started when the previous origin does not match
		// the current, or the origins don't allow matching. Origins
		// starting with * are always merged, those starting with + are
		// merged when similar and close together in time.
		if (opId == hist.lastSelOp ||
				(origin && hist.lastSelOrigin == origin &&
				 (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
					selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
			{ hist.done[hist.done.length - 1] = sel; }
		else
			{ pushSelectionToHistory(sel, hist.done); }

		hist.lastSelTime = +new Date;
		hist.lastSelOrigin = origin;
		hist.lastSelOp = opId;
		if (options && options.clearRedo !== false)
			{ clearSelectionEvents(hist.undone); }
	}

	function pushSelectionToHistory(sel, dest) {
		var top = lst(dest);
		if (!(top && top.ranges && top.equals(sel)))
			{ dest.push(sel); }
	}

	// Used to store marked span information in the history.
	function attachLocalSpans(doc, change, from, to) {
		var existing = change["spans_" + doc.id], n = 0;
		doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
			if (line.markedSpans)
				{ (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
			++n;
		});
	}

	// When un/re-doing restores text containing marked spans, those
	// that have been explicitly cleared should not be restored.
	function removeClearedSpans(spans) {
		if (!spans) { return null }
		var out;
		for (var i = 0; i < spans.length; ++i) {
			if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
			else if (out) { out.push(spans[i]); }
		}
		return !out ? spans : out.length ? out : null
	}

	// Retrieve and filter the old marked spans stored in a change event.
	function getOldSpans(doc, change) {
		var found = change["spans_" + doc.id];
		if (!found) { return null }
		var nw = [];
		for (var i = 0; i < change.text.length; ++i)
			{ nw.push(removeClearedSpans(found[i])); }
		return nw
	}

	// Used for un/re-doing changes from the history. Combines the
	// result of computing the existing spans with the set of spans that
	// existed in the history (so that deleting around a span and then
	// undoing brings back the span).
	function mergeOldSpans(doc, change) {
		var old = getOldSpans(doc, change);
		var stretched = stretchSpansOverChange(doc, change);
		if (!old) { return stretched }
		if (!stretched) { return old }

		for (var i = 0; i < old.length; ++i) {
			var oldCur = old[i], stretchCur = stretched[i];
			if (oldCur && stretchCur) {
				spans: for (var j = 0; j < stretchCur.length; ++j) {
					var span = stretchCur[j];
					for (var k = 0; k < oldCur.length; ++k)
						{ if (oldCur[k].marker == span.marker) { continue spans } }
					oldCur.push(span);
				}
			} else if (stretchCur) {
				old[i] = stretchCur;
			}
		}
		return old
	}

	// Used both to provide a JSON-safe object in .getHistory, and, when
	// detaching a document, to split the history in two
	function copyHistoryArray(events, newGroup, instantiateSel) {
		var copy = [];
		for (var i = 0; i < events.length; ++i) {
			var event = events[i];
			if (event.ranges) {
				copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
				continue
			}
			var changes = event.changes, newChanges = [];
			copy.push({changes: newChanges});
			for (var j = 0; j < changes.length; ++j) {
				var change = changes[j], m = (void 0);
				newChanges.push({from: change.from, to: change.to, text: change.text});
				if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
					if (indexOf(newGroup, Number(m[1])) > -1) {
						lst(newChanges)[prop] = change[prop];
						delete change[prop];
					}
				} } }
			}
		}
		return copy
	}

	// The 'scroll' parameter given to many of these indicated whether
	// the new cursor position should be scrolled into view after
	// modifying the selection.

	// If shift is held or the extend flag is set, extends a range to
	// include a given position (and optionally a second position).
	// Otherwise, simply returns the range between the given positions.
	// Used for cursor motion and such.
	function extendRange(range, head, other, extend) {
		if (extend) {
			var anchor = range.anchor;
			if (other) {
				var posBefore = cmp(head, anchor) < 0;
				if (posBefore != (cmp(other, anchor) < 0)) {
					anchor = head;
					head = other;
				} else if (posBefore != (cmp(head, other) < 0)) {
					head = other;
				}
			}
			return new Range(anchor, head)
		} else {
			return new Range(other || head, head)
		}
	}

	// Extend the primary selection range, discard the rest.
	function extendSelection(doc, head, other, options, extend) {
		if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
		setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
	}

	// Extend all selections (pos is an array of selections with length
	// equal the number of selections)
	function extendSelections(doc, heads, options) {
		var out = [];
		var extend = doc.cm && (doc.cm.display.shift || doc.extend);
		for (var i = 0; i < doc.sel.ranges.length; i++)
			{ out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
		var newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex);
		setSelection(doc, newSel, options);
	}

	// Updates a single range in the selection.
	function replaceOneSelection(doc, i, range, options) {
		var ranges = doc.sel.ranges.slice(0);
		ranges[i] = range;
		setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options);
	}

	// Reset the selection to a single range.
	function setSimpleSelection(doc, anchor, head, options) {
		setSelection(doc, simpleSelection(anchor, head), options);
	}

	// Give beforeSelectionChange handlers a change to influence a
	// selection update.
	function filterSelectionChange(doc, sel, options) {
		var obj = {
			ranges: sel.ranges,
			update: function(ranges) {
				var this$1 = this;

				this.ranges = [];
				for (var i = 0; i < ranges.length; i++)
					{ this$1.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
																		 clipPos(doc, ranges[i].head)); }
			},
			origin: options && options.origin
		};
		signal(doc, "beforeSelectionChange", doc, obj);
		if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
		if (obj.ranges != sel.ranges) { return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) }
		else { return sel }
	}

	function setSelectionReplaceHistory(doc, sel, options) {
		var done = doc.history.done, last = lst(done);
		if (last && last.ranges) {
			done[done.length - 1] = sel;
			setSelectionNoUndo(doc, sel, options);
		} else {
			setSelection(doc, sel, options);
		}
	}

	// Set a new selection.
	function setSelection(doc, sel, options) {
		setSelectionNoUndo(doc, sel, options);
		addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
	}

	function setSelectionNoUndo(doc, sel, options) {
		if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
			{ sel = filterSelectionChange(doc, sel, options); }

		var bias = options && options.bias ||
			(cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
		setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));

		if (!(options && options.scroll === false) && doc.cm)
			{ ensureCursorVisible(doc.cm); }
	}

	function setSelectionInner(doc, sel) {
		if (sel.equals(doc.sel)) { return }

		doc.sel = sel;

		if (doc.cm) {
			doc.cm.curOp.updateInput = 1;
			doc.cm.curOp.selectionChanged = true;
			signalCursorActivity(doc.cm);
		}
		signalLater(doc, "cursorActivity", doc);
	}

	// Verify that the selection does not partially select any atomic
	// marked ranges.
	function reCheckSelection(doc) {
		setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
	}

	// Return a selection that does not partially select any atomic
	// ranges.
	function skipAtomicInSelection(doc, sel, bias, mayClear) {
		var out;
		for (var i = 0; i < sel.ranges.length; i++) {
			var range = sel.ranges[i];
			var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
			var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
			var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
			if (out || newAnchor != range.anchor || newHead != range.head) {
				if (!out) { out = sel.ranges.slice(0, i); }
				out[i] = new Range(newAnchor, newHead);
			}
		}
		return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
	}

	function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
		var line = getLine(doc, pos.line);
		if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
			var sp = line.markedSpans[i], m = sp.marker;

			// Determine if we should prevent the cursor being placed to the left/right of an atomic marker
			// Historically this was determined using the inclusiveLeft/Right option, but the new way to control it
			// is with selectLeft/Right
			var preventCursorLeft = ("selectLeft" in m) ? !m.selectLeft : m.inclusiveLeft;
			var preventCursorRight = ("selectRight" in m) ? !m.selectRight : m.inclusiveRight;

			if ((sp.from == null || (preventCursorLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
					(sp.to == null || (preventCursorRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
				if (mayClear) {
					signal(m, "beforeCursorEnter");
					if (m.explicitlyCleared) {
						if (!line.markedSpans) { break }
						else {--i; continue}
					}
				}
				if (!m.atomic) { continue }

				if (oldPos) {
					var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
					if (dir < 0 ? preventCursorRight : preventCursorLeft)
						{ near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
					if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
						{ return skipAtomicInner(doc, near, pos, dir, mayClear) }
				}

				var far = m.find(dir < 0 ? -1 : 1);
				if (dir < 0 ? preventCursorLeft : preventCursorRight)
					{ far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
				return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
			}
		} }
		return pos
	}

	// Ensure a given position is not inside an atomic range.
	function skipAtomic(doc, pos, oldPos, bias, mayClear) {
		var dir = bias || 1;
		var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
				(!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
				skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
				(!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
		if (!found) {
			doc.cantEdit = true;
			return Pos(doc.first, 0)
		}
		return found
	}

	function movePos(doc, pos, dir, line) {
		if (dir < 0 && pos.ch == 0) {
			if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
			else { return null }
		} else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
			if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
			else { return null }
		} else {
			return new Pos(pos.line, pos.ch + dir)
		}
	}

	function selectAll(cm) {
		cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
	}

	// UPDATING

	// Allow "beforeChange" event handlers to influence a change
	function filterChange(doc, change, update) {
		var obj = {
			canceled: false,
			from: change.from,
			to: change.to,
			text: change.text,
			origin: change.origin,
			cancel: function () { return obj.canceled = true; }
		};
		if (update) { obj.update = function (from, to, text, origin) {
			if (from) { obj.from = clipPos(doc, from); }
			if (to) { obj.to = clipPos(doc, to); }
			if (text) { obj.text = text; }
			if (origin !== undefined) { obj.origin = origin; }
		}; }
		signal(doc, "beforeChange", doc, obj);
		if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }

		if (obj.canceled) {
			if (doc.cm) { doc.cm.curOp.updateInput = 2; }
			return null
		}
		return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
	}

	// Apply a change to a document, and add it to the document's
	// history, and propagating it to all linked documents.
	function makeChange(doc, change, ignoreReadOnly) {
		if (doc.cm) {
			if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
			if (doc.cm.state.suppressEdits) { return }
		}

		if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
			change = filterChange(doc, change, true);
			if (!change) { return }
		}

		// Possibly split or suppress the update based on the presence
		// of read-only spans in its range.
		var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
		if (split) {
			for (var i = split.length - 1; i >= 0; --i)
				{ makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
		} else {
			makeChangeInner(doc, change);
		}
	}

	function makeChangeInner(doc, change) {
		if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
		var selAfter = computeSelAfterChange(doc, change);
		addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);

		makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
		var rebased = [];

		linkedDocs(doc, function (doc, sharedHist) {
			if (!sharedHist && indexOf(rebased, doc.history) == -1) {
				rebaseHist(doc.history, change);
				rebased.push(doc.history);
			}
			makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
		});
	}

	// Revert a change stored in a document's history.
	function makeChangeFromHistory(doc, type, allowSelectionOnly) {
		var suppress = doc.cm && doc.cm.state.suppressEdits;
		if (suppress && !allowSelectionOnly) { return }

		var hist = doc.history, event, selAfter = doc.sel;
		var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;

		// Verify that there is a useable event (so that ctrl-z won't
		// needlessly clear selection events)
		var i = 0;
		for (; i < source.length; i++) {
			event = source[i];
			if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
				{ break }
		}
		if (i == source.length) { return }
		hist.lastOrigin = hist.lastSelOrigin = null;

		for (;;) {
			event = source.pop();
			if (event.ranges) {
				pushSelectionToHistory(event, dest);
				if (allowSelectionOnly && !event.equals(doc.sel)) {
					setSelection(doc, event, {clearRedo: false});
					return
				}
				selAfter = event;
			} else if (suppress) {
				source.push(event);
				return
			} else { break }
		}

		// Build up a reverse change object to add to the opposite history
		// stack (redo when undoing, and vice versa).
		var antiChanges = [];
		pushSelectionToHistory(selAfter, dest);
		dest.push({changes: antiChanges, generation: hist.generation});
		hist.generation = event.generation || ++hist.maxGeneration;

		var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");

		var loop = function ( i ) {
			var change = event.changes[i];
			change.origin = type;
			if (filter && !filterChange(doc, change, false)) {
				source.length = 0;
				return {}
			}

			antiChanges.push(historyChangeFromChange(doc, change));

			var after = i ? computeSelAfterChange(doc, change) : lst(source);
			makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
			if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
			var rebased = [];

			// Propagate to the linked documents
			linkedDocs(doc, function (doc, sharedHist) {
				if (!sharedHist && indexOf(rebased, doc.history) == -1) {
					rebaseHist(doc.history, change);
					rebased.push(doc.history);
				}
				makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
			});
		};

		for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
			var returned = loop( i$1 );

			if ( returned ) return returned.v;
		}
	}

	// Sub-views need their line numbers shifted when text is added
	// above or below them in the parent document.
	function shiftDoc(doc, distance) {
		if (distance == 0) { return }
		doc.first += distance;
		doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
			Pos(range.anchor.line + distance, range.anchor.ch),
			Pos(range.head.line + distance, range.head.ch)
		); }), doc.sel.primIndex);
		if (doc.cm) {
			regChange(doc.cm, doc.first, doc.first - distance, distance);
			for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
				{ regLineChange(doc.cm, l, "gutter"); }
		}
	}

	// More lower-level change function, handling only a single document
	// (not linked ones).
	function makeChangeSingleDoc(doc, change, selAfter, spans) {
		if (doc.cm && !doc.cm.curOp)
			{ return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }

		if (change.to.line < doc.first) {
			shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
			return
		}
		if (change.from.line > doc.lastLine()) { return }

		// Clip the change to the size of this doc
		if (change.from.line < doc.first) {
			var shift = change.text.length - 1 - (doc.first - change.from.line);
			shiftDoc(doc, shift);
			change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
								text: [lst(change.text)], origin: change.origin};
		}
		var last = doc.lastLine();
		if (change.to.line > last) {
			change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
								text: [change.text[0]], origin: change.origin};
		}

		change.removed = getBetween(doc, change.from, change.to);

		if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
		if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
		else { updateDoc(doc, change, spans); }
		setSelectionNoUndo(doc, selAfter, sel_dontScroll);
	}

	// Handle the interaction of a change to a document with the editor
	// that this document is part of.
	function makeChangeSingleDocInEditor(cm, change, spans) {
		var doc = cm.doc, display = cm.display, from = change.from, to = change.to;

		var recomputeMaxLength = false, checkWidthStart = from.line;
		if (!cm.options.lineWrapping) {
			checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
			doc.iter(checkWidthStart, to.line + 1, function (line) {
				if (line == display.maxLine) {
					recomputeMaxLength = true;
					return true
				}
			});
		}

		if (doc.sel.contains(change.from, change.to) > -1)
			{ signalCursorActivity(cm); }

		updateDoc(doc, change, spans, estimateHeight(cm));

		if (!cm.options.lineWrapping) {
			doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
				var len = lineLength(line);
				if (len > display.maxLineLength) {
					display.maxLine = line;
					display.maxLineLength = len;
					display.maxLineChanged = true;
					recomputeMaxLength = false;
				}
			});
			if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
		}

		retreatFrontier(doc, from.line);
		startWorker(cm, 400);

		var lendiff = change.text.length - (to.line - from.line) - 1;
		// Remember that these lines changed, for updating the display
		if (change.full)
			{ regChange(cm); }
		else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
			{ regLineChange(cm, from.line, "text"); }
		else
			{ regChange(cm, from.line, to.line + 1, lendiff); }

		var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
		if (changeHandler || changesHandler) {
			var obj = {
				from: from, to: to,
				text: change.text,
				removed: change.removed,
				origin: change.origin
			};
			if (changeHandler) { signalLater(cm, "change", cm, obj); }
			if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
		}
		cm.display.selForContextMenu = null;
	}

	function replaceRange(doc, code, from, to, origin) {
		var assign;

		if (!to) { to = from; }
		if (cmp(to, from) < 0) { (assign = [to, from], from = assign[0], to = assign[1]); }
		if (typeof code == "string") { code = doc.splitLines(code); }
		makeChange(doc, {from: from, to: to, text: code, origin: origin});
	}

	// Rebasing/resetting history to deal with externally-sourced changes

	function rebaseHistSelSingle(pos, from, to, diff) {
		if (to < pos.line) {
			pos.line += diff;
		} else if (from < pos.line) {
			pos.line = from;
			pos.ch = 0;
		}
	}

	// Tries to rebase an array of history events given a change in the
	// document. If the change touches the same lines as the event, the
	// event, and everything 'behind' it, is discarded. If the change is
	// before the event, the event's positions are updated. Uses a
	// copy-on-write scheme for the positions, to avoid having to
	// reallocate them all on every rebase, but also avoid problems with
	// shared position objects being unsafely updated.
	function rebaseHistArray(array, from, to, diff) {
		for (var i = 0; i < array.length; ++i) {
			var sub = array[i], ok = true;
			if (sub.ranges) {
				if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
				for (var j = 0; j < sub.ranges.length; j++) {
					rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
					rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
				}
				continue
			}
			for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
				var cur = sub.changes[j$1];
				if (to < cur.from.line) {
					cur.from = Pos(cur.from.line + diff, cur.from.ch);
					cur.to = Pos(cur.to.line + diff, cur.to.ch);
				} else if (from <= cur.to.line) {
					ok = false;
					break
				}
			}
			if (!ok) {
				array.splice(0, i + 1);
				i = 0;
			}
		}
	}

	function rebaseHist(hist, change) {
		var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
		rebaseHistArray(hist.done, from, to, diff);
		rebaseHistArray(hist.undone, from, to, diff);
	}

	// Utility for applying a change to a line by handle or number,
	// returning the number and optionally registering the line as
	// changed.
	function changeLine(doc, handle, changeType, op) {
		var no = handle, line = handle;
		if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
		else { no = lineNo(handle); }
		if (no == null) { return null }
		if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
		return line
	}

	// The document is represented as a BTree consisting of leaves, with
	// chunk of lines in them, and branches, with up to ten leaves or
	// other branch nodes below them. The top node is always a branch
	// node, and is the document object itself (meaning it has
	// additional methods and properties).
	//
	// All nodes have parent links. The tree is used both to go from
	// line numbers to line objects, and to go from objects to numbers.
	// It also indexes by height, and is used to convert between height
	// and line object, and to find the total height of the document.
	//
	// See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html

	function LeafChunk(lines) {
		var this$1 = this;

		this.lines = lines;
		this.parent = null;
		var height = 0;
		for (var i = 0; i < lines.length; ++i) {
			lines[i].parent = this$1;
			height += lines[i].height;
		}
		this.height = height;
	}

	LeafChunk.prototype = {
		chunkSize: function() { return this.lines.length },

		// Remove the n lines at offset 'at'.
		removeInner: function(at, n) {
			var this$1 = this;

			for (var i = at, e = at + n; i < e; ++i) {
				var line = this$1.lines[i];
				this$1.height -= line.height;
				cleanUpLine(line);
				signalLater(line, "delete");
			}
			this.lines.splice(at, n);
		},

		// Helper used to collapse a small branch into a single leaf.
		collapse: function(lines) {
			lines.push.apply(lines, this.lines);
		},

		// Insert the given array of lines at offset 'at', count them as
		// having the given height.
		insertInner: function(at, lines, height) {
			var this$1 = this;

			this.height += height;
			this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
			for (var i = 0; i < lines.length; ++i) { lines[i].parent = this$1; }
		},

		// Used to iterate over a part of the tree.
		iterN: function(at, n, op) {
			var this$1 = this;

			for (var e = at + n; at < e; ++at)
				{ if (op(this$1.lines[at])) { return true } }
		}
	};

	function BranchChunk(children) {
		var this$1 = this;

		this.children = children;
		var size = 0, height = 0;
		for (var i = 0; i < children.length; ++i) {
			var ch = children[i];
			size += ch.chunkSize(); height += ch.height;
			ch.parent = this$1;
		}
		this.size = size;
		this.height = height;
		this.parent = null;
	}

	BranchChunk.prototype = {
		chunkSize: function() { return this.size },

		removeInner: function(at, n) {
			var this$1 = this;

			this.size -= n;
			for (var i = 0; i < this.children.length; ++i) {
				var child = this$1.children[i], sz = child.chunkSize();
				if (at < sz) {
					var rm = Math.min(n, sz - at), oldHeight = child.height;
					child.removeInner(at, rm);
					this$1.height -= oldHeight - child.height;
					if (sz == rm) { this$1.children.splice(i--, 1); child.parent = null; }
					if ((n -= rm) == 0) { break }
					at = 0;
				} else { at -= sz; }
			}
			// If the result is smaller than 25 lines, ensure that it is a
			// single leaf node.
			if (this.size - n < 25 &&
					(this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
				var lines = [];
				this.collapse(lines);
				this.children = [new LeafChunk(lines)];
				this.children[0].parent = this;
			}
		},

		collapse: function(lines) {
			var this$1 = this;

			for (var i = 0; i < this.children.length; ++i) { this$1.children[i].collapse(lines); }
		},

		insertInner: function(at, lines, height) {
			var this$1 = this;

			this.size += lines.length;
			this.height += height;
			for (var i = 0; i < this.children.length; ++i) {
				var child = this$1.children[i], sz = child.chunkSize();
				if (at <= sz) {
					child.insertInner(at, lines, height);
					if (child.lines && child.lines.length > 50) {
						// To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
						// Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
						var remaining = child.lines.length % 25 + 25;
						for (var pos = remaining; pos < child.lines.length;) {
							var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
							child.height -= leaf.height;
							this$1.children.splice(++i, 0, leaf);
							leaf.parent = this$1;
						}
						child.lines = child.lines.slice(0, remaining);
						this$1.maybeSpill();
					}
					break
				}
				at -= sz;
			}
		},

		// When a node has grown, check whether it should be split.
		maybeSpill: function() {
			if (this.children.length <= 10) { return }
			var me = this;
			do {
				var spilled = me.children.splice(me.children.length - 5, 5);
				var sibling = new BranchChunk(spilled);
				if (!me.parent) { // Become the parent node
					var copy = new BranchChunk(me.children);
					copy.parent = me;
					me.children = [copy, sibling];
					me = copy;
			 } else {
					me.size -= sibling.size;
					me.height -= sibling.height;
					var myIndex = indexOf(me.parent.children, me);
					me.parent.children.splice(myIndex + 1, 0, sibling);
				}
				sibling.parent = me.parent;
			} while (me.children.length > 10)
			me.parent.maybeSpill();
		},

		iterN: function(at, n, op) {
			var this$1 = this;

			for (var i = 0; i < this.children.length; ++i) {
				var child = this$1.children[i], sz = child.chunkSize();
				if (at < sz) {
					var used = Math.min(n, sz - at);
					if (child.iterN(at, used, op)) { return true }
					if ((n -= used) == 0) { break }
					at = 0;
				} else { at -= sz; }
			}
		}
	};

	// Line widgets are block elements displayed above or below a line.

	var LineWidget = function(doc, node, options) {
		var this$1 = this;

		if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
			{ this$1[opt] = options[opt]; } } }
		this.doc = doc;
		this.node = node;
	};

	LineWidget.prototype.clear = function () {
			var this$1 = this;

		var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
		if (no == null || !ws) { return }
		for (var i = 0; i < ws.length; ++i) { if (ws[i] == this$1) { ws.splice(i--, 1); } }
		if (!ws.length) { line.widgets = null; }
		var height = widgetHeight(this);
		updateLineHeight(line, Math.max(0, line.height - height));
		if (cm) {
			runInOp(cm, function () {
				adjustScrollWhenAboveVisible(cm, line, -height);
				regLineChange(cm, no, "widget");
			});
			signalLater(cm, "lineWidgetCleared", cm, this, no);
		}
	};

	LineWidget.prototype.changed = function () {
			var this$1 = this;

		var oldH = this.height, cm = this.doc.cm, line = this.line;
		this.height = null;
		var diff = widgetHeight(this) - oldH;
		if (!diff) { return }
		if (!lineIsHidden(this.doc, line)) { updateLineHeight(line, line.height + diff); }
		if (cm) {
			runInOp(cm, function () {
				cm.curOp.forceUpdate = true;
				adjustScrollWhenAboveVisible(cm, line, diff);
				signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
			});
		}
	};
	eventMixin(LineWidget);

	function adjustScrollWhenAboveVisible(cm, line, diff) {
		if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
			{ addToScrollTop(cm, diff); }
	}

	function addLineWidget(doc, handle, node, options) {
		var widget = new LineWidget(doc, node, options);
		var cm = doc.cm;
		if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
		changeLine(doc, handle, "widget", function (line) {
			var widgets = line.widgets || (line.widgets = []);
			if (widget.insertAt == null) { widgets.push(widget); }
			else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); }
			widget.line = line;
			if (cm && !lineIsHidden(doc, line)) {
				var aboveVisible = heightAtLine(line) < doc.scrollTop;
				updateLineHeight(line, line.height + widgetHeight(widget));
				if (aboveVisible) { addToScrollTop(cm, widget.height); }
				cm.curOp.forceUpdate = true;
			}
			return true
		});
		if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
		return widget
	}

	// TEXTMARKERS

	// Created with markText and setBookmark methods. A TextMarker is a
	// handle that can be used to clear or find a marked position in the
	// document. Line objects hold arrays (markedSpans) containing
	// {from, to, marker} object pointing to such marker objects, and
	// indicating that such a marker is present on that line. Multiple
	// lines may point to the same marker when it spans across lines.
	// The spans will have null for their from/to properties when the
	// marker continues beyond the start/end of the line. Markers have
	// links back to the lines they currently touch.

	// Collapsed markers have unique ids, in order to be able to order
	// them, which is needed for uniquely determining an outer marker
	// when they overlap (they may nest, but not partially overlap).
	var nextMarkerId = 0;

	var TextMarker = function(doc, type) {
		this.lines = [];
		this.type = type;
		this.doc = doc;
		this.id = ++nextMarkerId;
	};

	// Clear the marker.
	TextMarker.prototype.clear = function () {
			var this$1 = this;

		if (this.explicitlyCleared) { return }
		var cm = this.doc.cm, withOp = cm && !cm.curOp;
		if (withOp) { startOperation(cm); }
		if (hasHandler(this, "clear")) {
			var found = this.find();
			if (found) { signalLater(this, "clear", found.from, found.to); }
		}
		var min = null, max = null;
		for (var i = 0; i < this.lines.length; ++i) {
			var line = this$1.lines[i];
			var span = getMarkedSpanFor(line.markedSpans, this$1);
			if (cm && !this$1.collapsed) { regLineChange(cm, lineNo(line), "text"); }
			else if (cm) {
				if (span.to != null) { max = lineNo(line); }
				if (span.from != null) { min = lineNo(line); }
			}
			line.markedSpans = removeMarkedSpan(line.markedSpans, span);
			if (span.from == null && this$1.collapsed && !lineIsHidden(this$1.doc, line) && cm)
				{ updateLineHeight(line, textHeight(cm.display)); }
		}
		if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
			var visual = visualLine(this$1.lines[i$1]), len = lineLength(visual);
			if (len > cm.display.maxLineLength) {
				cm.display.maxLine = visual;
				cm.display.maxLineLength = len;
				cm.display.maxLineChanged = true;
			}
		} }

		if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
		this.lines.length = 0;
		this.explicitlyCleared = true;
		if (this.atomic && this.doc.cantEdit) {
			this.doc.cantEdit = false;
			if (cm) { reCheckSelection(cm.doc); }
		}
		if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
		if (withOp) { endOperation(cm); }
		if (this.parent) { this.parent.clear(); }
	};

	// Find the position of the marker in the document. Returns a {from,
	// to} object by default. Side can be passed to get a specific side
	// -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
	// Pos objects returned contain a line object, rather than a line
	// number (used to prevent looking up the same line twice).
	TextMarker.prototype.find = function (side, lineObj) {
			var this$1 = this;

		if (side == null && this.type == "bookmark") { side = 1; }
		var from, to;
		for (var i = 0; i < this.lines.length; ++i) {
			var line = this$1.lines[i];
			var span = getMarkedSpanFor(line.markedSpans, this$1);
			if (span.from != null) {
				from = Pos(lineObj ? line : lineNo(line), span.from);
				if (side == -1) { return from }
			}
			if (span.to != null) {
				to = Pos(lineObj ? line : lineNo(line), span.to);
				if (side == 1) { return to }
			}
		}
		return from && {from: from, to: to}
	};

	// Signals that the marker's widget changed, and surrounding layout
	// should be recomputed.
	TextMarker.prototype.changed = function () {
			var this$1 = this;

		var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
		if (!pos || !cm) { return }
		runInOp(cm, function () {
			var line = pos.line, lineN = lineNo(pos.line);
			var view = findViewForLine(cm, lineN);
			if (view) {
				clearLineMeasurementCacheFor(view);
				cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
			}
			cm.curOp.updateMaxLine = true;
			if (!lineIsHidden(widget.doc, line) && widget.height != null) {
				var oldHeight = widget.height;
				widget.height = null;
				var dHeight = widgetHeight(widget) - oldHeight;
				if (dHeight)
					{ updateLineHeight(line, line.height + dHeight); }
			}
			signalLater(cm, "markerChanged", cm, this$1);
		});
	};

	TextMarker.prototype.attachLine = function (line) {
		if (!this.lines.length && this.doc.cm) {
			var op = this.doc.cm.curOp;
			if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
				{ (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
		}
		this.lines.push(line);
	};

	TextMarker.prototype.detachLine = function (line) {
		this.lines.splice(indexOf(this.lines, line), 1);
		if (!this.lines.length && this.doc.cm) {
			var op = this.doc.cm.curOp
			;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
		}
	};
	eventMixin(TextMarker);

	// Create a marker, wire it up to the right lines, and
	function markText(doc, from, to, options, type) {
		// Shared markers (across linked documents) are handled separately
		// (markTextShared will call out to this again, once per
		// document).
		if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
		// Ensure we are in an operation.
		if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }

		var marker = new TextMarker(doc, type), diff = cmp(from, to);
		if (options) { copyObj(options, marker, false); }
		// Don't connect empty markers unless clearWhenEmpty is false
		if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
			{ return marker }
		if (marker.replacedWith) {
			// Showing up as a widget implies collapsed (widget replaces text)
			marker.collapsed = true;
			marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
			if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
			if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
		}
		if (marker.collapsed) {
			if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
					from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
				{ throw new Error("Inserting collapsed marker partially overlapping an existing one") }
			seeCollapsedSpans();
		}

		if (marker.addToHistory)
			{ addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }

		var curLine = from.line, cm = doc.cm, updateMaxLine;
		doc.iter(curLine, to.line + 1, function (line) {
			if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
				{ updateMaxLine = true; }
			if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
			addMarkedSpan(line, new MarkedSpan(marker,
																				 curLine == from.line ? from.ch : null,
																				 curLine == to.line ? to.ch : null));
			++curLine;
		});
		// lineIsHidden depends on the presence of the spans, so needs a second pass
		if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
			if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
		}); }

		if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }

		if (marker.readOnly) {
			seeReadOnlySpans();
			if (doc.history.done.length || doc.history.undone.length)
				{ doc.clearHistory(); }
		}
		if (marker.collapsed) {
			marker.id = ++nextMarkerId;
			marker.atomic = true;
		}
		if (cm) {
			// Sync editor state
			if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
			if (marker.collapsed)
				{ regChange(cm, from.line, to.line + 1); }
			else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
							 marker.attributes || marker.title)
				{ for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
			if (marker.atomic) { reCheckSelection(cm.doc); }
			signalLater(cm, "markerAdded", cm, marker);
		}
		return marker
	}

	// SHARED TEXTMARKERS

	// A shared marker spans multiple linked documents. It is
	// implemented as a meta-marker-object controlling multiple normal
	// markers.
	var SharedTextMarker = function(markers, primary) {
		var this$1 = this;

		this.markers = markers;
		this.primary = primary;
		for (var i = 0; i < markers.length; ++i)
			{ markers[i].parent = this$1; }
	};

	SharedTextMarker.prototype.clear = function () {
			var this$1 = this;

		if (this.explicitlyCleared) { return }
		this.explicitlyCleared = true;
		for (var i = 0; i < this.markers.length; ++i)
			{ this$1.markers[i].clear(); }
		signalLater(this, "clear");
	};

	SharedTextMarker.prototype.find = function (side, lineObj) {
		return this.primary.find(side, lineObj)
	};
	eventMixin(SharedTextMarker);

	function markTextShared(doc, from, to, options, type) {
		options = copyObj(options);
		options.shared = false;
		var markers = [markText(doc, from, to, options, type)], primary = markers[0];
		var widget = options.widgetNode;
		linkedDocs(doc, function (doc) {
			if (widget) { options.widgetNode = widget.cloneNode(true); }
			markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
			for (var i = 0; i < doc.linked.length; ++i)
				{ if (doc.linked[i].isParent) { return } }
			primary = lst(markers);
		});
		return new SharedTextMarker(markers, primary)
	}

	function findSharedMarkers(doc) {
		return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
	}

	function copySharedMarkers(doc, markers) {
		for (var i = 0; i < markers.length; i++) {
			var marker = markers[i], pos = marker.find();
			var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
			if (cmp(mFrom, mTo)) {
				var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
				marker.markers.push(subMark);
				subMark.parent = marker;
			}
		}
	}

	function detachSharedMarkers(markers) {
		var loop = function ( i ) {
			var marker = markers[i], linked = [marker.primary.doc];
			linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
			for (var j = 0; j < marker.markers.length; j++) {
				var subMarker = marker.markers[j];
				if (indexOf(linked, subMarker.doc) == -1) {
					subMarker.parent = null;
					marker.markers.splice(j--, 1);
				}
			}
		};

		for (var i = 0; i < markers.length; i++) loop( i );
	}

	var nextDocId = 0;
	var Doc = function(text, mode, firstLine, lineSep, direction) {
		if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
		if (firstLine == null) { firstLine = 0; }

		BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
		this.first = firstLine;
		this.scrollTop = this.scrollLeft = 0;
		this.cantEdit = false;
		this.cleanGeneration = 1;
		this.modeFrontier = this.highlightFrontier = firstLine;
		var start = Pos(firstLine, 0);
		this.sel = simpleSelection(start);
		this.history = new History(null);
		this.id = ++nextDocId;
		this.modeOption = mode;
		this.lineSep = lineSep;
		this.direction = (direction == "rtl") ? "rtl" : "ltr";
		this.extend = false;

		if (typeof text == "string") { text = this.splitLines(text); }
		updateDoc(this, {from: start, to: start, text: text});
		setSelection(this, simpleSelection(start), sel_dontScroll);
	};

	Doc.prototype = createObj(BranchChunk.prototype, {
		constructor: Doc,
		// Iterate over the document. Supports two forms -- with only one
		// argument, it calls that for each line in the document. With
		// three, it iterates over the range given by the first two (with
		// the second being non-inclusive).
		iter: function(from, to, op) {
			if (op) { this.iterN(from - this.first, to - from, op); }
			else { this.iterN(this.first, this.first + this.size, from); }
		},

		// Non-public interface for adding and removing lines.
		insert: function(at, lines) {
			var height = 0;
			for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
			this.insertInner(at - this.first, lines, height);
		},
		remove: function(at, n) { this.removeInner(at - this.first, n); },

		// From here, the methods are part of the public interface. Most
		// are also available from CodeMirror (editor) instances.

		getValue: function(lineSep) {
			var lines = getLines(this, this.first, this.first + this.size);
			if (lineSep === false) { return lines }
			return lines.join(lineSep || this.lineSeparator())
		},
		setValue: docMethodOp(function(code) {
			var top = Pos(this.first, 0), last = this.first + this.size - 1;
			makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
												text: this.splitLines(code), origin: "setValue", full: true}, true);
			if (this.cm) { scrollToCoords(this.cm, 0, 0); }
			setSelection(this, simpleSelection(top), sel_dontScroll);
		}),
		replaceRange: function(code, from, to, origin) {
			from = clipPos(this, from);
			to = to ? clipPos(this, to) : from;
			replaceRange(this, code, from, to, origin);
		},
		getRange: function(from, to, lineSep) {
			var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
			if (lineSep === false) { return lines }
			return lines.join(lineSep || this.lineSeparator())
		},

		getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},

		getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
		getLineNumber: function(line) {return lineNo(line)},

		getLineHandleVisualStart: function(line) {
			if (typeof line == "number") { line = getLine(this, line); }
			return visualLine(line)
		},

		lineCount: function() {return this.size},
		firstLine: function() {return this.first},
		lastLine: function() {return this.first + this.size - 1},

		clipPos: function(pos) {return clipPos(this, pos)},

		getCursor: function(start) {
			var range$$1 = this.sel.primary(), pos;
			if (start == null || start == "head") { pos = range$$1.head; }
			else if (start == "anchor") { pos = range$$1.anchor; }
			else if (start == "end" || start == "to" || start === false) { pos = range$$1.to(); }
			else { pos = range$$1.from(); }
			return pos
		},
		listSelections: function() { return this.sel.ranges },
		somethingSelected: function() {return this.sel.somethingSelected()},

		setCursor: docMethodOp(function(line, ch, options) {
			setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
		}),
		setSelection: docMethodOp(function(anchor, head, options) {
			setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
		}),
		extendSelection: docMethodOp(function(head, other, options) {
			extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
		}),
		extendSelections: docMethodOp(function(heads, options) {
			extendSelections(this, clipPosArray(this, heads), options);
		}),
		extendSelectionsBy: docMethodOp(function(f, options) {
			var heads = map(this.sel.ranges, f);
			extendSelections(this, clipPosArray(this, heads), options);
		}),
		setSelections: docMethodOp(function(ranges, primary, options) {
			var this$1 = this;

			if (!ranges.length) { return }
			var out = [];
			for (var i = 0; i < ranges.length; i++)
				{ out[i] = new Range(clipPos(this$1, ranges[i].anchor),
													 clipPos(this$1, ranges[i].head)); }
			if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
			setSelection(this, normalizeSelection(this.cm, out, primary), options);
		}),
		addSelection: docMethodOp(function(anchor, head, options) {
			var ranges = this.sel.ranges.slice(0);
			ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
			setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options);
		}),

		getSelection: function(lineSep) {
			var this$1 = this;

			var ranges = this.sel.ranges, lines;
			for (var i = 0; i < ranges.length; i++) {
				var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
				lines = lines ? lines.concat(sel) : sel;
			}
			if (lineSep === false) { return lines }
			else { return lines.join(lineSep || this.lineSeparator()) }
		},
		getSelections: function(lineSep) {
			var this$1 = this;

			var parts = [], ranges = this.sel.ranges;
			for (var i = 0; i < ranges.length; i++) {
				var sel = getBetween(this$1, ranges[i].from(), ranges[i].to());
				if (lineSep !== false) { sel = sel.join(lineSep || this$1.lineSeparator()); }
				parts[i] = sel;
			}
			return parts
		},
		replaceSelection: function(code, collapse, origin) {
			var dup = [];
			for (var i = 0; i < this.sel.ranges.length; i++)
				{ dup[i] = code; }
			this.replaceSelections(dup, collapse, origin || "+input");
		},
		replaceSelections: docMethodOp(function(code, collapse, origin) {
			var this$1 = this;

			var changes = [], sel = this.sel;
			for (var i = 0; i < sel.ranges.length; i++) {
				var range$$1 = sel.ranges[i];
				changes[i] = {from: range$$1.from(), to: range$$1.to(), text: this$1.splitLines(code[i]), origin: origin};
			}
			var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
			for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
				{ makeChange(this$1, changes[i$1]); }
			if (newSel) { setSelectionReplaceHistory(this, newSel); }
			else if (this.cm) { ensureCursorVisible(this.cm); }
		}),
		undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
		redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
		undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
		redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),

		setExtending: function(val) {this.extend = val;},
		getExtending: function() {return this.extend},

		historySize: function() {
			var hist = this.history, done = 0, undone = 0;
			for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
			for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
			return {undo: done, redo: undone}
		},
		clearHistory: function() {this.history = new History(this.history.maxGeneration);},

		markClean: function() {
			this.cleanGeneration = this.changeGeneration(true);
		},
		changeGeneration: function(forceSplit) {
			if (forceSplit)
				{ this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
			return this.history.generation
		},
		isClean: function (gen) {
			return this.history.generation == (gen || this.cleanGeneration)
		},

		getHistory: function() {
			return {done: copyHistoryArray(this.history.done),
							undone: copyHistoryArray(this.history.undone)}
		},
		setHistory: function(histData) {
			var hist = this.history = new History(this.history.maxGeneration);
			hist.done = copyHistoryArray(histData.done.slice(0), null, true);
			hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
		},

		setGutterMarker: docMethodOp(function(line, gutterID, value) {
			return changeLine(this, line, "gutter", function (line) {
				var markers = line.gutterMarkers || (line.gutterMarkers = {});
				markers[gutterID] = value;
				if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
				return true
			})
		}),

		clearGutter: docMethodOp(function(gutterID) {
			var this$1 = this;

			this.iter(function (line) {
				if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
					changeLine(this$1, line, "gutter", function () {
						line.gutterMarkers[gutterID] = null;
						if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
						return true
					});
				}
			});
		}),

		lineInfo: function(line) {
			var n;
			if (typeof line == "number") {
				if (!isLine(this, line)) { return null }
				n = line;
				line = getLine(this, line);
				if (!line) { return null }
			} else {
				n = lineNo(line);
				if (n == null) { return null }
			}
			return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
							textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
							widgets: line.widgets}
		},

		addLineClass: docMethodOp(function(handle, where, cls) {
			return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
				var prop = where == "text" ? "textClass"
								 : where == "background" ? "bgClass"
								 : where == "gutter" ? "gutterClass" : "wrapClass";
				if (!line[prop]) { line[prop] = cls; }
				else if (classTest(cls).test(line[prop])) { return false }
				else { line[prop] += " " + cls; }
				return true
			})
		}),
		removeLineClass: docMethodOp(function(handle, where, cls) {
			return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
				var prop = where == "text" ? "textClass"
								 : where == "background" ? "bgClass"
								 : where == "gutter" ? "gutterClass" : "wrapClass";
				var cur = line[prop];
				if (!cur) { return false }
				else if (cls == null) { line[prop] = null; }
				else {
					var found = cur.match(classTest(cls));
					if (!found) { return false }
					var end = found.index + found[0].length;
					line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
				}
				return true
			})
		}),

		addLineWidget: docMethodOp(function(handle, node, options) {
			return addLineWidget(this, handle, node, options)
		}),
		removeLineWidget: function(widget) { widget.clear(); },

		markText: function(from, to, options) {
			return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
		},
		setBookmark: function(pos, options) {
			var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
											insertLeft: options && options.insertLeft,
											clearWhenEmpty: false, shared: options && options.shared,
											handleMouseEvents: options && options.handleMouseEvents};
			pos = clipPos(this, pos);
			return markText(this, pos, pos, realOpts, "bookmark")
		},
		findMarksAt: function(pos) {
			pos = clipPos(this, pos);
			var markers = [], spans = getLine(this, pos.line).markedSpans;
			if (spans) { for (var i = 0; i < spans.length; ++i) {
				var span = spans[i];
				if ((span.from == null || span.from <= pos.ch) &&
						(span.to == null || span.to >= pos.ch))
					{ markers.push(span.marker.parent || span.marker); }
			} }
			return markers
		},
		findMarks: function(from, to, filter) {
			from = clipPos(this, from); to = clipPos(this, to);
			var found = [], lineNo$$1 = from.line;
			this.iter(from.line, to.line + 1, function (line) {
				var spans = line.markedSpans;
				if (spans) { for (var i = 0; i < spans.length; i++) {
					var span = spans[i];
					if (!(span.to != null && lineNo$$1 == from.line && from.ch >= span.to ||
								span.from == null && lineNo$$1 != from.line ||
								span.from != null && lineNo$$1 == to.line && span.from >= to.ch) &&
							(!filter || filter(span.marker)))
						{ found.push(span.marker.parent || span.marker); }
				} }
				++lineNo$$1;
			});
			return found
		},
		getAllMarks: function() {
			var markers = [];
			this.iter(function (line) {
				var sps = line.markedSpans;
				if (sps) { for (var i = 0; i < sps.length; ++i)
					{ if (sps[i].from != null) { markers.push(sps[i].marker); } } }
			});
			return markers
		},

		posFromIndex: function(off) {
			var ch, lineNo$$1 = this.first, sepSize = this.lineSeparator().length;
			this.iter(function (line) {
				var sz = line.text.length + sepSize;
				if (sz > off) { ch = off; return true }
				off -= sz;
				++lineNo$$1;
			});
			return clipPos(this, Pos(lineNo$$1, ch))
		},
		indexFromPos: function (coords) {
			coords = clipPos(this, coords);
			var index = coords.ch;
			if (coords.line < this.first || coords.ch < 0) { return 0 }
			var sepSize = this.lineSeparator().length;
			this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
				index += line.text.length + sepSize;
			});
			return index
		},

		copy: function(copyHistory) {
			var doc = new Doc(getLines(this, this.first, this.first + this.size),
												this.modeOption, this.first, this.lineSep, this.direction);
			doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
			doc.sel = this.sel;
			doc.extend = false;
			if (copyHistory) {
				doc.history.undoDepth = this.history.undoDepth;
				doc.setHistory(this.getHistory());
			}
			return doc
		},

		linkedDoc: function(options) {
			if (!options) { options = {}; }
			var from = this.first, to = this.first + this.size;
			if (options.from != null && options.from > from) { from = options.from; }
			if (options.to != null && options.to < to) { to = options.to; }
			var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
			if (options.sharedHist) { copy.history = this.history
			; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
			copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
			copySharedMarkers(copy, findSharedMarkers(this));
			return copy
		},
		unlinkDoc: function(other) {
			var this$1 = this;

			if (other instanceof CodeMirror) { other = other.doc; }
			if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
				var link = this$1.linked[i];
				if (link.doc != other) { continue }
				this$1.linked.splice(i, 1);
				other.unlinkDoc(this$1);
				detachSharedMarkers(findSharedMarkers(this$1));
				break
			} }
			// If the histories were shared, split them again
			if (other.history == this.history) {
				var splitIds = [other.id];
				linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
				other.history = new History(null);
				other.history.done = copyHistoryArray(this.history.done, splitIds);
				other.history.undone = copyHistoryArray(this.history.undone, splitIds);
			}
		},
		iterLinkedDocs: function(f) {linkedDocs(this, f);},

		getMode: function() {return this.mode},
		getEditor: function() {return this.cm},

		splitLines: function(str) {
			if (this.lineSep) { return str.split(this.lineSep) }
			return splitLinesAuto(str)
		},
		lineSeparator: function() { return this.lineSep || "\n" },

		setDirection: docMethodOp(function (dir) {
			if (dir != "rtl") { dir = "ltr"; }
			if (dir == this.direction) { return }
			this.direction = dir;
			this.iter(function (line) { return line.order = null; });
			if (this.cm) { directionChanged(this.cm); }
		})
	});

	// Public alias.
	Doc.prototype.eachLine = Doc.prototype.iter;

	// Kludge to work around strange IE behavior where it'll sometimes
	// re-fire a series of drag-related events right after the drop (#1551)
	var lastDrop = 0;

	function onDrop(e) {
		var cm = this;
		clearDragCursor(cm);
		if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
			{ return }
		e_preventDefault(e);
		if (ie) { lastDrop = +new Date; }
		var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
		if (!pos || cm.isReadOnly()) { return }
		// Might be a file drop, in which case we simply extract the text
		// and insert it.
		if (files && files.length && window.FileReader && window.File) {
			var n = files.length, text = Array(n), read = 0;
			var loadFile = function (file, i) {
				if (cm.options.allowDropFileTypes &&
						indexOf(cm.options.allowDropFileTypes, file.type) == -1)
					{ return }

				var reader = new FileReader;
				reader.onload = operation(cm, function () {
					var content = reader.result;
					if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) { content = ""; }
					text[i] = content;
					if (++read == n) {
						pos = clipPos(cm.doc, pos);
						var change = {from: pos, to: pos,
													text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())),
													origin: "paste"};
						makeChange(cm.doc, change);
						setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change)));
					}
				});
				reader.readAsText(file);
			};
			for (var i = 0; i < n; ++i) { loadFile(files[i], i); }
		} else { // Normal drop
			// Don't do a replace if the drop happened inside of the selected text.
			if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
				cm.state.draggingText(e);
				// Ensure the editor is re-focused
				setTimeout(function () { return cm.display.input.focus(); }, 20);
				return
			}
			try {
				var text$1 = e.dataTransfer.getData("Text");
				if (text$1) {
					var selected;
					if (cm.state.draggingText && !cm.state.draggingText.copy)
						{ selected = cm.listSelections(); }
					setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
					if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
						{ replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
					cm.replaceSelection(text$1, "around", "paste");
					cm.display.input.focus();
				}
			}
			catch(e){}
		}
	}

	function onDragStart(cm, e) {
		if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
		if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }

		e.dataTransfer.setData("Text", cm.getSelection());
		e.dataTransfer.effectAllowed = "copyMove";

		// Use dummy image instead of default browsers image.
		// Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
		if (e.dataTransfer.setDragImage && !safari) {
			var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
			img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
			if (presto) {
				img.width = img.height = 1;
				cm.display.wrapper.appendChild(img);
				// Force a relayout, or Opera won't use our image for some obscure reason
				img._top = img.offsetTop;
			}
			e.dataTransfer.setDragImage(img, 0, 0);
			if (presto) { img.parentNode.removeChild(img); }
		}
	}

	function onDragOver(cm, e) {
		var pos = posFromMouse(cm, e);
		if (!pos) { return }
		var frag = document.createDocumentFragment();
		drawSelectionCursor(cm, pos, frag);
		if (!cm.display.dragCursor) {
			cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
			cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
		}
		removeChildrenAndAdd(cm.display.dragCursor, frag);
	}

	function clearDragCursor(cm) {
		if (cm.display.dragCursor) {
			cm.display.lineSpace.removeChild(cm.display.dragCursor);
			cm.display.dragCursor = null;
		}
	}

	// These must be handled carefully, because naively registering a
	// handler for each editor will cause the editors to never be
	// garbage collected.

	function forEachCodeMirror(f) {
		if (!document.getElementsByClassName) { return }
		var byClass = document.getElementsByClassName("CodeMirror"), editors = [];
		for (var i = 0; i < byClass.length; i++) {
			var cm = byClass[i].CodeMirror;
			if (cm) { editors.push(cm); }
		}
		if (editors.length) { editors[0].operation(function () {
			for (var i = 0; i < editors.length; i++) { f(editors[i]); }
		}); }
	}

	var globalsRegistered = false;
	function ensureGlobalHandlers() {
		if (globalsRegistered) { return }
		registerGlobalHandlers();
		globalsRegistered = true;
	}
	function registerGlobalHandlers() {
		// When the window resizes, we need to refresh active editors.
		var resizeTimer;
		on(window, "resize", function () {
			if (resizeTimer == null) { resizeTimer = setTimeout(function () {
				resizeTimer = null;
				forEachCodeMirror(onResize);
			}, 100); }
		});
		// When the window loses focus, we want to show the editor as blurred
		on(window, "blur", function () { return forEachCodeMirror(onBlur); });
	}
	// Called when the window resizes
	function onResize(cm) {
		var d = cm.display;
		// Might be a text scaling operation, clear size caches.
		d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
		d.scrollbarsClipped = false;
		cm.setSize();
	}

	var keyNames = {
		3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
		19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
		36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
		46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
		106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
		173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
		221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
		63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
	};

	// Number keys
	for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
	// Alphabetic keys
	for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
	// Function keys
	for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }

	var keyMap = {};

	keyMap.basic = {
		"Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
		"End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
		"Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
		"Tab": "defaultTab", "Shift-Tab": "indentAuto",
		"Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
		"Esc": "singleSelection"
	};
	// Note that the save and find-related commands aren't defined by
	// default. User code or addons can define them. Unknown commands
	// are simply ignored.
	keyMap.pcDefault = {
		"Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
		"Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
		"Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
		"Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
		"Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
		"Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
		"Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
		"fallthrough": "basic"
	};
	// Very basic readline/emacs-style bindings, which are standard on Mac.
	keyMap.emacsy = {
		"Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
		"Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
		"Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
		"Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
		"Ctrl-O": "openLine"
	};
	keyMap.macDefault = {
		"Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
		"Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
		"Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
		"Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
		"Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
		"Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
		"Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
		"fallthrough": ["basic", "emacsy"]
	};
	keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;

	// KEYMAP DISPATCH

	function normalizeKeyName(name) {
		var parts = name.split(/-(?!$)/);
		name = parts[parts.length - 1];
		var alt, ctrl, shift, cmd;
		for (var i = 0; i < parts.length - 1; i++) {
			var mod = parts[i];
			if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
			else if (/^a(lt)?$/i.test(mod)) { alt = true; }
			else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
			else if (/^s(hift)?$/i.test(mod)) { shift = true; }
			else { throw new Error("Unrecognized modifier name: " + mod) }
		}
		if (alt) { name = "Alt-" + name; }
		if (ctrl) { name = "Ctrl-" + name; }
		if (cmd) { name = "Cmd-" + name; }
		if (shift) { name = "Shift-" + name; }
		return name
	}

	// This is a kludge to keep keymaps mostly working as raw objects
	// (backwards compatibility) while at the same time support features
	// like normalization and multi-stroke key bindings. It compiles a
	// new normalized keymap, and then updates the old object to reflect
	// this.
	function normalizeKeyMap(keymap) {
		var copy = {};
		for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
			var value = keymap[keyname];
			if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
			if (value == "...") { delete keymap[keyname]; continue }

			var keys = map(keyname.split(" "), normalizeKeyName);
			for (var i = 0; i < keys.length; i++) {
				var val = (void 0), name = (void 0);
				if (i == keys.length - 1) {
					name = keys.join(" ");
					val = value;
				} else {
					name = keys.slice(0, i + 1).join(" ");
					val = "...";
				}
				var prev = copy[name];
				if (!prev) { copy[name] = val; }
				else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
			}
			delete keymap[keyname];
		} }
		for (var prop in copy) { keymap[prop] = copy[prop]; }
		return keymap
	}

	function lookupKey(key, map$$1, handle, context) {
		map$$1 = getKeyMap(map$$1);
		var found = map$$1.call ? map$$1.call(key, context) : map$$1[key];
		if (found === false) { return "nothing" }
		if (found === "...") { return "multi" }
		if (found != null && handle(found)) { return "handled" }

		if (map$$1.fallthrough) {
			if (Object.prototype.toString.call(map$$1.fallthrough) != "[object Array]")
				{ return lookupKey(key, map$$1.fallthrough, handle, context) }
			for (var i = 0; i < map$$1.fallthrough.length; i++) {
				var result = lookupKey(key, map$$1.fallthrough[i], handle, context);
				if (result) { return result }
			}
		}
	}

	// Modifier key presses don't count as 'real' key presses for the
	// purpose of keymap fallthrough.
	function isModifierKey(value) {
		var name = typeof value == "string" ? value : keyNames[value.keyCode];
		return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
	}

	function addModifierNames(name, event, noShift) {
		var base = name;
		if (event.altKey && base != "Alt") { name = "Alt-" + name; }
		if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
		if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") { name = "Cmd-" + name; }
		if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
		return name
	}

	// Look up the name of a key as indicated by an event object.
	function keyName(event, noShift) {
		if (presto && event.keyCode == 34 && event["char"]) { return false }
		var name = keyNames[event.keyCode];
		if (name == null || event.altGraphKey) { return false }
		// Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
		// so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
		if (event.keyCode == 3 && event.code) { name = event.code; }
		return addModifierNames(name, event, noShift)
	}

	function getKeyMap(val) {
		return typeof val == "string" ? keyMap[val] : val
	}

	// Helper for deleting text near the selection(s), used to implement
	// backspace, delete, and similar functionality.
	function deleteNearSelection(cm, compute) {
		var ranges = cm.doc.sel.ranges, kill = [];
		// Build up a set of ranges to kill first, merging overlapping
		// ranges.
		for (var i = 0; i < ranges.length; i++) {
			var toKill = compute(ranges[i]);
			while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
				var replaced = kill.pop();
				if (cmp(replaced.from, toKill.from) < 0) {
					toKill.from = replaced.from;
					break
				}
			}
			kill.push(toKill);
		}
		// Next, remove those actual ranges.
		runInOp(cm, function () {
			for (var i = kill.length - 1; i >= 0; i--)
				{ replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
			ensureCursorVisible(cm);
		});
	}

	function moveCharLogically(line, ch, dir) {
		var target = skipExtendingChars(line.text, ch + dir, dir);
		return target < 0 || target > line.text.length ? null : target
	}

	function moveLogically(line, start, dir) {
		var ch = moveCharLogically(line, start.ch, dir);
		return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
	}

	function endOfLine(visually, cm, lineObj, lineNo, dir) {
		if (visually) {
			var order = getOrder(lineObj, cm.doc.direction);
			if (order) {
				var part = dir < 0 ? lst(order) : order[0];
				var moveInStorageOrder = (dir < 0) == (part.level == 1);
				var sticky = moveInStorageOrder ? "after" : "before";
				var ch;
				// With a wrapped rtl chunk (possibly spanning multiple bidi parts),
				// it could be that the last bidi part is not on the last visual line,
				// since visual lines contain content order-consecutive chunks.
				// Thus, in rtl, we are looking for the first (content-order) character
				// in the rtl chunk that is on the last line (that is, the same line
				// as the last (content-order) character).
				if (part.level > 0 || cm.doc.direction == "rtl") {
					var prep = prepareMeasureForLine(cm, lineObj);
					ch = dir < 0 ? lineObj.text.length - 1 : 0;
					var targetTop = measureCharPrepared(cm, prep, ch).top;
					ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
					if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
				} else { ch = dir < 0 ? part.to : part.from; }
				return new Pos(lineNo, ch, sticky)
			}
		}
		return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
	}

	function moveVisually(cm, line, start, dir) {
		var bidi = getOrder(line, cm.doc.direction);
		if (!bidi) { return moveLogically(line, start, dir) }
		if (start.ch >= line.text.length) {
			start.ch = line.text.length;
			start.sticky = "before";
		} else if (start.ch <= 0) {
			start.ch = 0;
			start.sticky = "after";
		}
		var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
		if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
			// Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
			// nothing interesting happens.
			return moveLogically(line, start, dir)
		}

		var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
		var prep;
		var getWrappedLineExtent = function (ch) {
			if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
			prep = prep || prepareMeasureForLine(cm, line);
			return wrappedLineExtentChar(cm, line, prep, ch)
		};
		var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);

		if (cm.doc.direction == "rtl" || part.level == 1) {
			var moveInStorageOrder = (part.level == 1) == (dir < 0);
			var ch = mv(start, moveInStorageOrder ? 1 : -1);
			if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
				// Case 2: We move within an rtl part or in an rtl editor on the same visual line
				var sticky = moveInStorageOrder ? "before" : "after";
				return new Pos(start.line, ch, sticky)
			}
		}

		// Case 3: Could not move within this bidi part in this visual line, so leave
		// the current bidi part

		var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
			var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
				? new Pos(start.line, mv(ch, 1), "before")
				: new Pos(start.line, ch, "after"); };

			for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
				var part = bidi[partPos];
				var moveInStorageOrder = (dir > 0) == (part.level != 1);
				var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
				if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
				ch = moveInStorageOrder ? part.from : mv(part.to, -1);
				if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
			}
		};

		// Case 3a: Look for other bidi parts on the same visual line
		var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
		if (res) { return res }

		// Case 3b: Look for other bidi parts on the next visual line
		var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
		if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
			res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
			if (res) { return res }
		}

		// Case 4: Nowhere to move
		return null
	}

	// Commands are parameter-less actions that can be performed on an
	// editor, mostly used for keybindings.
	var commands = {
		selectAll: selectAll,
		singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
		killLine: function (cm) { return deleteNearSelection(cm, function (range) {
			if (range.empty()) {
				var len = getLine(cm.doc, range.head.line).text.length;
				if (range.head.ch == len && range.head.line < cm.lastLine())
					{ return {from: range.head, to: Pos(range.head.line + 1, 0)} }
				else
					{ return {from: range.head, to: Pos(range.head.line, len)} }
			} else {
				return {from: range.from(), to: range.to()}
			}
		}); },
		deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
			from: Pos(range.from().line, 0),
			to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
		}); }); },
		delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
			from: Pos(range.from().line, 0), to: range.from()
		}); }); },
		delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
			var top = cm.charCoords(range.head, "div").top + 5;
			var leftPos = cm.coordsChar({left: 0, top: top}, "div");
			return {from: leftPos, to: range.from()}
		}); },
		delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
			var top = cm.charCoords(range.head, "div").top + 5;
			var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
			return {from: range.from(), to: rightPos }
		}); },
		undo: function (cm) { return cm.undo(); },
		redo: function (cm) { return cm.redo(); },
		undoSelection: function (cm) { return cm.undoSelection(); },
		redoSelection: function (cm) { return cm.redoSelection(); },
		goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
		goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
		goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
			{origin: "+move", bias: 1}
		); },
		goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
			{origin: "+move", bias: 1}
		); },
		goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
			{origin: "+move", bias: -1}
		); },
		goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
			var top = cm.cursorCoords(range.head, "div").top + 5;
			return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
		}, sel_move); },
		goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
			var top = cm.cursorCoords(range.head, "div").top + 5;
			return cm.coordsChar({left: 0, top: top}, "div")
		}, sel_move); },
		goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
			var top = cm.cursorCoords(range.head, "div").top + 5;
			var pos = cm.coordsChar({left: 0, top: top}, "div");
			if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
			return pos
		}, sel_move); },
		goLineUp: function (cm) { return cm.moveV(-1, "line"); },
		goLineDown: function (cm) { return cm.moveV(1, "line"); },
		goPageUp: function (cm) { return cm.moveV(-1, "page"); },
		goPageDown: function (cm) { return cm.moveV(1, "page"); },
		goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
		goCharRight: function (cm) { return cm.moveH(1, "char"); },
		goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
		goColumnRight: function (cm) { return cm.moveH(1, "column"); },
		goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
		goGroupRight: function (cm) { return cm.moveH(1, "group"); },
		goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
		goWordRight: function (cm) { return cm.moveH(1, "word"); },
		delCharBefore: function (cm) { return cm.deleteH(-1, "char"); },
		delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
		delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
		delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
		delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
		delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
		indentAuto: function (cm) { return cm.indentSelection("smart"); },
		indentMore: function (cm) { return cm.indentSelection("add"); },
		indentLess: function (cm) { return cm.indentSelection("subtract"); },
		insertTab: function (cm) { return cm.replaceSelection("\t"); },
		insertSoftTab: function (cm) {
			var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
			for (var i = 0; i < ranges.length; i++) {
				var pos = ranges[i].from();
				var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
				spaces.push(spaceStr(tabSize - col % tabSize));
			}
			cm.replaceSelections(spaces);
		},
		defaultTab: function (cm) {
			if (cm.somethingSelected()) { cm.indentSelection("add"); }
			else { cm.execCommand("insertTab"); }
		},
		// Swap the two chars left and right of each selection's head.
		// Move cursor behind the two swapped characters afterwards.
		//
		// Doesn't consider line feeds a character.
		// Doesn't scan more than one line above to find a character.
		// Doesn't do anything on an empty line.
		// Doesn't do anything with non-empty selections.
		transposeChars: function (cm) { return runInOp(cm, function () {
			var ranges = cm.listSelections(), newSel = [];
			for (var i = 0; i < ranges.length; i++) {
				if (!ranges[i].empty()) { continue }
				var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
				if (line) {
					if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
					if (cur.ch > 0) {
						cur = new Pos(cur.line, cur.ch + 1);
						cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
														Pos(cur.line, cur.ch - 2), cur, "+transpose");
					} else if (cur.line > cm.doc.first) {
						var prev = getLine(cm.doc, cur.line - 1).text;
						if (prev) {
							cur = new Pos(cur.line, 1);
							cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
															prev.charAt(prev.length - 1),
															Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
						}
					}
				}
				newSel.push(new Range(cur, cur));
			}
			cm.setSelections(newSel);
		}); },
		newlineAndIndent: function (cm) { return runInOp(cm, function () {
			var sels = cm.listSelections();
			for (var i = sels.length - 1; i >= 0; i--)
				{ cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
			sels = cm.listSelections();
			for (var i$1 = 0; i$1 < sels.length; i$1++)
				{ cm.indentLine(sels[i$1].from().line, null, true); }
			ensureCursorVisible(cm);
		}); },
		openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
		toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
	};


	function lineStart(cm, lineN) {
		var line = getLine(cm.doc, lineN);
		var visual = visualLine(line);
		if (visual != line) { lineN = lineNo(visual); }
		return endOfLine(true, cm, visual, lineN, 1)
	}
	function lineEnd(cm, lineN) {
		var line = getLine(cm.doc, lineN);
		var visual = visualLineEnd(line);
		if (visual != line) { lineN = lineNo(visual); }
		return endOfLine(true, cm, line, lineN, -1)
	}
	function lineStartSmart(cm, pos) {
		var start = lineStart(cm, pos.line);
		var line = getLine(cm.doc, start.line);
		var order = getOrder(line, cm.doc.direction);
		if (!order || order[0].level == 0) {
			var firstNonWS = Math.max(0, line.text.search(/\S/));
			var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
			return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
		}
		return start
	}

	// Run a handler that was bound to a key.
	function doHandleBinding(cm, bound, dropShift) {
		if (typeof bound == "string") {
			bound = commands[bound];
			if (!bound) { return false }
		}
		// Ensure previous input has been read, so that the handler sees a
		// consistent view of the document
		cm.display.input.ensurePolled();
		var prevShift = cm.display.shift, done = false;
		try {
			if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
			if (dropShift) { cm.display.shift = false; }
			done = bound(cm) != Pass;
		} finally {
			cm.display.shift = prevShift;
			cm.state.suppressEdits = false;
		}
		return done
	}

	function lookupKeyForEditor(cm, name, handle) {
		for (var i = 0; i < cm.state.keyMaps.length; i++) {
			var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
			if (result) { return result }
		}
		return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
			|| lookupKey(name, cm.options.keyMap, handle, cm)
	}

	// Note that, despite the name, this function is also used to check
	// for bound mouse clicks.

	var stopSeq = new Delayed;

	function dispatchKey(cm, name, e, handle) {
		var seq = cm.state.keySeq;
		if (seq) {
			if (isModifierKey(name)) { return "handled" }
			if (/\'$/.test(name))
				{ cm.state.keySeq = null; }
			else
				{ stopSeq.set(50, function () {
					if (cm.state.keySeq == seq) {
						cm.state.keySeq = null;
						cm.display.input.reset();
					}
				}); }
			if (dispatchKeyInner(cm, seq + " " + name, e, handle)) { return true }
		}
		return dispatchKeyInner(cm, name, e, handle)
	}

	function dispatchKeyInner(cm, name, e, handle) {
		var result = lookupKeyForEditor(cm, name, handle);

		if (result == "multi")
			{ cm.state.keySeq = name; }
		if (result == "handled")
			{ signalLater(cm, "keyHandled", cm, name, e); }

		if (result == "handled" || result == "multi") {
			e_preventDefault(e);
			restartBlink(cm);
		}

		return !!result
	}

	// Handle a key from the keydown event.
	function handleKeyBinding(cm, e) {
		var name = keyName(e, true);
		if (!name) { return false }

		if (e.shiftKey && !cm.state.keySeq) {
			// First try to resolve full name (including 'Shift-'). Failing
			// that, see if there is a cursor-motion command (starting with
			// 'go') bound to the keyname without 'Shift-'.
			return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
					|| dispatchKey(cm, name, e, function (b) {
							 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
								 { return doHandleBinding(cm, b) }
						 })
		} else {
			return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
		}
	}

	// Handle a key from the keypress event
	function handleCharBinding(cm, e, ch) {
		return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
	}

	var lastStoppedKey = null;
	function onKeyDown(e) {
		var cm = this;
		cm.curOp.focus = activeElt();
		if (signalDOMEvent(cm, e)) { return }
		// IE does strange things with escape.
		if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
		var code = e.keyCode;
		cm.display.shift = code == 16 || e.shiftKey;
		var handled = handleKeyBinding(cm, e);
		if (presto) {
			lastStoppedKey = handled ? code : null;
			// Opera has no cut event... we try to at least catch the key combo
			if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
				{ cm.replaceSelection("", null, "cut"); }
		}

		// Turn mouse into crosshair when Alt is held on Mac.
		if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
			{ showCrossHair(cm); }
	}

	function showCrossHair(cm) {
		var lineDiv = cm.display.lineDiv;
		addClass(lineDiv, "CodeMirror-crosshair");

		function up(e) {
			if (e.keyCode == 18 || !e.altKey) {
				rmClass(lineDiv, "CodeMirror-crosshair");
				off(document, "keyup", up);
				off(document, "mouseover", up);
			}
		}
		on(document, "keyup", up);
		on(document, "mouseover", up);
	}

	function onKeyUp(e) {
		if (e.keyCode == 16) { this.doc.sel.shift = false; }
		signalDOMEvent(this, e);
	}

	function onKeyPress(e) {
		var cm = this;
		if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
		var keyCode = e.keyCode, charCode = e.charCode;
		if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
		if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
		var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
		// Some browsers fire keypress events for backspace
		if (ch == "\x08") { return }
		if (handleCharBinding(cm, e, ch)) { return }
		cm.display.input.onKeyPress(e);
	}

	var DOUBLECLICK_DELAY = 400;

	var PastClick = function(time, pos, button) {
		this.time = time;
		this.pos = pos;
		this.button = button;
	};

	PastClick.prototype.compare = function (time, pos, button) {
		return this.time + DOUBLECLICK_DELAY > time &&
			cmp(pos, this.pos) == 0 && button == this.button
	};

	var lastClick, lastDoubleClick;
	function clickRepeat(pos, button) {
		var now = +new Date;
		if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
			lastClick = lastDoubleClick = null;
			return "triple"
		} else if (lastClick && lastClick.compare(now, pos, button)) {
			lastDoubleClick = new PastClick(now, pos, button);
			lastClick = null;
			return "double"
		} else {
			lastClick = new PastClick(now, pos, button);
			lastDoubleClick = null;
			return "single"
		}
	}

	// A mouse down can be a single click, double click, triple click,
	// start of selection drag, start of text drag, new cursor
	// (ctrl-click), rectangle drag (alt-drag), or xwin
	// middle-click-paste. Or it might be a click on something we should
	// not interfere with, such as a scrollbar or widget.
	function onMouseDown(e) {
		var cm = this, display = cm.display;
		if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
		display.input.ensurePolled();
		display.shift = e.shiftKey;

		if (eventInWidget(display, e)) {
			if (!webkit) {
				// Briefly turn off draggability, to allow widgets to do
				// normal dragging things.
				display.scroller.draggable = false;
				setTimeout(function () { return display.scroller.draggable = true; }, 100);
			}
			return
		}
		if (clickInGutter(cm, e)) { return }
		var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
		window.focus();

		// #3261: make sure, that we're not starting a second selection
		if (button == 1 && cm.state.selectingText)
			{ cm.state.selectingText(e); }

		if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }

		if (button == 1) {
			if (pos) { leftButtonDown(cm, pos, repeat, e); }
			else if (e_target(e) == display.scroller) { e_preventDefault(e); }
		} else if (button == 2) {
			if (pos) { extendSelection(cm.doc, pos); }
			setTimeout(function () { return display.input.focus(); }, 20);
		} else if (button == 3) {
			if (captureRightClick) { cm.display.input.onContextMenu(e); }
			else { delayBlurEvent(cm); }
		}
	}

	function handleMappedButton(cm, button, pos, repeat, event) {
		var name = "Click";
		if (repeat == "double") { name = "Double" + name; }
		else if (repeat == "triple") { name = "Triple" + name; }
		name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;

		return dispatchKey(cm,  addModifierNames(name, event), event, function (bound) {
			if (typeof bound == "string") { bound = commands[bound]; }
			if (!bound) { return false }
			var done = false;
			try {
				if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
				done = bound(cm, pos) != Pass;
			} finally {
				cm.state.suppressEdits = false;
			}
			return done
		})
	}

	function configureMouse(cm, repeat, event) {
		var option = cm.getOption("configureMouse");
		var value = option ? option(cm, repeat, event) : {};
		if (value.unit == null) {
			var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
			value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
		}
		if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
		if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
		if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
		return value
	}

	function leftButtonDown(cm, pos, repeat, event) {
		if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
		else { cm.curOp.focus = activeElt(); }

		var behavior = configureMouse(cm, repeat, event);

		var sel = cm.doc.sel, contained;
		if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
				repeat == "single" && (contained = sel.contains(pos)) > -1 &&
				(cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
				(cmp(contained.to(), pos) > 0 || pos.xRel < 0))
			{ leftButtonStartDrag(cm, event, pos, behavior); }
		else
			{ leftButtonSelect(cm, event, pos, behavior); }
	}

	// Start a text drag. When it ends, see if any dragging actually
	// happen, and treat as a click if it didn't.
	function leftButtonStartDrag(cm, event, pos, behavior) {
		var display = cm.display, moved = false;
		var dragEnd = operation(cm, function (e) {
			if (webkit) { display.scroller.draggable = false; }
			cm.state.draggingText = false;
			off(display.wrapper.ownerDocument, "mouseup", dragEnd);
			off(display.wrapper.ownerDocument, "mousemove", mouseMove);
			off(display.scroller, "dragstart", dragStart);
			off(display.scroller, "drop", dragEnd);
			if (!moved) {
				e_preventDefault(e);
				if (!behavior.addNew)
					{ extendSelection(cm.doc, pos, null, null, behavior.extend); }
				// Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
				if (webkit || ie && ie_version == 9)
					{ setTimeout(function () {display.wrapper.ownerDocument.body.focus(); display.input.focus();}, 20); }
				else
					{ display.input.focus(); }
			}
		});
		var mouseMove = function(e2) {
			moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
		};
		var dragStart = function () { return moved = true; };
		// Let the drag handler handle this.
		if (webkit) { display.scroller.draggable = true; }
		cm.state.draggingText = dragEnd;
		dragEnd.copy = !behavior.moveOnDrag;
		// IE's approach to draggable
		if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
		on(display.wrapper.ownerDocument, "mouseup", dragEnd);
		on(display.wrapper.ownerDocument, "mousemove", mouseMove);
		on(display.scroller, "dragstart", dragStart);
		on(display.scroller, "drop", dragEnd);

		delayBlurEvent(cm);
		setTimeout(function () { return display.input.focus(); }, 20);
	}

	function rangeForUnit(cm, pos, unit) {
		if (unit == "char") { return new Range(pos, pos) }
		if (unit == "word") { return cm.findWordAt(pos) }
		if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
		var result = unit(cm, pos);
		return new Range(result.from, result.to)
	}

	// Normal selection, as opposed to text dragging.
	function leftButtonSelect(cm, event, start, behavior) {
		var display = cm.display, doc = cm.doc;
		e_preventDefault(event);

		var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
		if (behavior.addNew && !behavior.extend) {
			ourIndex = doc.sel.contains(start);
			if (ourIndex > -1)
				{ ourRange = ranges[ourIndex]; }
			else
				{ ourRange = new Range(start, start); }
		} else {
			ourRange = doc.sel.primary();
			ourIndex = doc.sel.primIndex;
		}

		if (behavior.unit == "rectangle") {
			if (!behavior.addNew) { ourRange = new Range(start, start); }
			start = posFromMouse(cm, event, true, true);
			ourIndex = -1;
		} else {
			var range$$1 = rangeForUnit(cm, start, behavior.unit);
			if (behavior.extend)
				{ ourRange = extendRange(ourRange, range$$1.anchor, range$$1.head, behavior.extend); }
			else
				{ ourRange = range$$1; }
		}

		if (!behavior.addNew) {
			ourIndex = 0;
			setSelection(doc, new Selection([ourRange], 0), sel_mouse);
			startSel = doc.sel;
		} else if (ourIndex == -1) {
			ourIndex = ranges.length;
			setSelection(doc, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
									 {scroll: false, origin: "*mouse"});
		} else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
			setSelection(doc, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
									 {scroll: false, origin: "*mouse"});
			startSel = doc.sel;
		} else {
			replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
		}

		var lastPos = start;
		function extendTo(pos) {
			if (cmp(lastPos, pos) == 0) { return }
			lastPos = pos;

			if (behavior.unit == "rectangle") {
				var ranges = [], tabSize = cm.options.tabSize;
				var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
				var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
				var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
				for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
						 line <= end; line++) {
					var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
					if (left == right)
						{ ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
					else if (text.length > leftPos)
						{ ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
				}
				if (!ranges.length) { ranges.push(new Range(start, start)); }
				setSelection(doc, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
										 {origin: "*mouse", scroll: false});
				cm.scrollIntoView(pos);
			} else {
				var oldRange = ourRange;
				var range$$1 = rangeForUnit(cm, pos, behavior.unit);
				var anchor = oldRange.anchor, head;
				if (cmp(range$$1.anchor, anchor) > 0) {
					head = range$$1.head;
					anchor = minPos(oldRange.from(), range$$1.anchor);
				} else {
					head = range$$1.anchor;
					anchor = maxPos(oldRange.to(), range$$1.head);
				}
				var ranges$1 = startSel.ranges.slice(0);
				ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head));
				setSelection(doc, normalizeSelection(cm, ranges$1, ourIndex), sel_mouse);
			}
		}

		var editorSize = display.wrapper.getBoundingClientRect();
		// Used to ensure timeout re-tries don't fire when another extend
		// happened in the meantime (clearTimeout isn't reliable -- at
		// least on Chrome, the timeouts still happen even when cleared,
		// if the clear happens after their scheduled firing time).
		var counter = 0;

		function extend(e) {
			var curCount = ++counter;
			var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
			if (!cur) { return }
			if (cmp(cur, lastPos) != 0) {
				cm.curOp.focus = activeElt();
				extendTo(cur);
				var visible = visibleLines(display, doc);
				if (cur.line >= visible.to || cur.line < visible.from)
					{ setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
			} else {
				var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
				if (outside) { setTimeout(operation(cm, function () {
					if (counter != curCount) { return }
					display.scroller.scrollTop += outside;
					extend(e);
				}), 50); }
			}
		}

		function done(e) {
			cm.state.selectingText = false;
			counter = Infinity;
			// If e is null or undefined we interpret this as someone trying
			// to explicitly cancel the selection rather than the user
			// letting go of the mouse button.
			if (e) {
				e_preventDefault(e);
				display.input.focus();
			}
			off(display.wrapper.ownerDocument, "mousemove", move);
			off(display.wrapper.ownerDocument, "mouseup", up);
			doc.history.lastSelOrigin = null;
		}

		var move = operation(cm, function (e) {
			if (e.buttons === 0 || !e_button(e)) { done(e); }
			else { extend(e); }
		});
		var up = operation(cm, done);
		cm.state.selectingText = up;
		on(display.wrapper.ownerDocument, "mousemove", move);
		on(display.wrapper.ownerDocument, "mouseup", up);
	}

	// Used when mouse-selecting to adjust the anchor to the proper side
	// of a bidi jump depending on the visual position of the head.
	function bidiSimplify(cm, range$$1) {
		var anchor = range$$1.anchor;
		var head = range$$1.head;
		var anchorLine = getLine(cm.doc, anchor.line);
		if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range$$1 }
		var order = getOrder(anchorLine);
		if (!order) { return range$$1 }
		var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
		if (part.from != anchor.ch && part.to != anchor.ch) { return range$$1 }
		var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
		if (boundary == 0 || boundary == order.length) { return range$$1 }

		// Compute the relative visual position of the head compared to the
		// anchor (<0 is to the left, >0 to the right)
		var leftSide;
		if (head.line != anchor.line) {
			leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
		} else {
			var headIndex = getBidiPartAt(order, head.ch, head.sticky);
			var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
			if (headIndex == boundary - 1 || headIndex == boundary)
				{ leftSide = dir < 0; }
			else
				{ leftSide = dir > 0; }
		}

		var usePart = order[boundary + (leftSide ? -1 : 0)];
		var from = leftSide == (usePart.level == 1);
		var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
		return anchor.ch == ch && anchor.sticky == sticky ? range$$1 : new Range(new Pos(anchor.line, ch, sticky), head)
	}


	// Determines whether an event happened in the gutter, and fires the
	// handlers for the corresponding event.
	function gutterEvent(cm, e, type, prevent) {
		var mX, mY;
		if (e.touches) {
			mX = e.touches[0].clientX;
			mY = e.touches[0].clientY;
		} else {
			try { mX = e.clientX; mY = e.clientY; }
			catch(e) { return false }
		}
		if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
		if (prevent) { e_preventDefault(e); }

		var display = cm.display;
		var lineBox = display.lineDiv.getBoundingClientRect();

		if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
		mY -= lineBox.top - display.viewOffset;

		for (var i = 0; i < cm.display.gutterSpecs.length; ++i) {
			var g = display.gutters.childNodes[i];
			if (g && g.getBoundingClientRect().right >= mX) {
				var line = lineAtHeight(cm.doc, mY);
				var gutter = cm.display.gutterSpecs[i];
				signal(cm, type, cm, line, gutter.className, e);
				return e_defaultPrevented(e)
			}
		}
	}

	function clickInGutter(cm, e) {
		return gutterEvent(cm, e, "gutterClick", true)
	}

	// CONTEXT MENU HANDLING

	// To make the context menu work, we need to briefly unhide the
	// textarea (making it as unobtrusive as possible) to let the
	// right-click take effect on it.
	function onContextMenu(cm, e) {
		if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
		if (signalDOMEvent(cm, e, "contextmenu")) { return }
		if (!captureRightClick) { cm.display.input.onContextMenu(e); }
	}

	function contextMenuInGutter(cm, e) {
		if (!hasHandler(cm, "gutterContextMenu")) { return false }
		return gutterEvent(cm, e, "gutterContextMenu", false)
	}

	function themeChanged(cm) {
		cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
			cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
		clearCaches(cm);
	}

	var Init = {toString: function(){return "CodeMirror.Init"}};

	var defaults = {};
	var optionHandlers = {};

	function defineOptions(CodeMirror) {
		var optionHandlers = CodeMirror.optionHandlers;

		function option(name, deflt, handle, notOnInit) {
			CodeMirror.defaults[name] = deflt;
			if (handle) { optionHandlers[name] =
				notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
		}

		CodeMirror.defineOption = option;

		// Passed to option handlers when there is no old value.
		CodeMirror.Init = Init;

		// These two are, on init, called from the constructor because they
		// have to be initialized before the editor can start at all.
		option("value", "", function (cm, val) { return cm.setValue(val); }, true);
		option("mode", null, function (cm, val) {
			cm.doc.modeOption = val;
			loadMode(cm);
		}, true);

		option("indentUnit", 2, loadMode, true);
		option("indentWithTabs", false);
		option("smartIndent", true);
		option("tabSize", 4, function (cm) {
			resetModeState(cm);
			clearCaches(cm);
			regChange(cm);
		}, true);

		option("lineSeparator", null, function (cm, val) {
			cm.doc.lineSep = val;
			if (!val) { return }
			var newBreaks = [], lineNo = cm.doc.first;
			cm.doc.iter(function (line) {
				for (var pos = 0;;) {
					var found = line.text.indexOf(val, pos);
					if (found == -1) { break }
					pos = found + val.length;
					newBreaks.push(Pos(lineNo, found));
				}
				lineNo++;
			});
			for (var i = newBreaks.length - 1; i >= 0; i--)
				{ replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
		});
		option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200f\u2028\u2029\ufeff\ufff9-\ufffc]/g, function (cm, val, old) {
			cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
			if (old != Init) { cm.refresh(); }
		});
		option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
		option("electricChars", true);
		option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
			throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
		}, true);
		option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
		option("autocorrect", false, function (cm, val) { return cm.getInputField().autocorrect = val; }, true);
		option("autocapitalize", false, function (cm, val) { return cm.getInputField().autocapitalize = val; }, true);
		option("rtlMoveVisually", !windows);
		option("wholeLineUpdateBefore", true);

		option("theme", "default", function (cm) {
			themeChanged(cm);
			updateGutters(cm);
		}, true);
		option("keyMap", "default", function (cm, val, old) {
			var next = getKeyMap(val);
			var prev = old != Init && getKeyMap(old);
			if (prev && prev.detach) { prev.detach(cm, next); }
			if (next.attach) { next.attach(cm, prev || null); }
		});
		option("extraKeys", null);
		option("configureMouse", null);

		option("lineWrapping", false, wrappingChanged, true);
		option("gutters", [], function (cm, val) {
			cm.display.gutterSpecs = getGutters(val, cm.options.lineNumbers);
			updateGutters(cm);
		}, true);
		option("fixedGutter", true, function (cm, val) {
			cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
			cm.refresh();
		}, true);
		option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
		option("scrollbarStyle", "native", function (cm) {
			initScrollbars(cm);
			updateScrollbars(cm);
			cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
			cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
		}, true);
		option("lineNumbers", false, function (cm, val) {
			cm.display.gutterSpecs = getGutters(cm.options.gutters, val);
			updateGutters(cm);
		}, true);
		option("firstLineNumber", 1, updateGutters, true);
		option("lineNumberFormatter", function (integer) { return integer; }, updateGutters, true);
		option("showCursorWhenSelecting", false, updateSelection, true);

		option("resetSelectionOnContextMenu", true);
		option("lineWiseCopyCut", true);
		option("pasteLinesPerSelection", true);
		option("selectionsMayTouch", false);

		option("readOnly", false, function (cm, val) {
			if (val == "nocursor") {
				onBlur(cm);
				cm.display.input.blur();
			}
			cm.display.input.readOnlyChanged(val);
		});
		option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
		option("dragDrop", true, dragDropChanged);
		option("allowDropFileTypes", null);

		option("cursorBlinkRate", 530);
		option("cursorScrollMargin", 0);
		option("cursorHeight", 1, updateSelection, true);
		option("singleCursorHeightPerLine", true, updateSelection, true);
		option("workTime", 100);
		option("workDelay", 100);
		option("flattenSpans", true, resetModeState, true);
		option("addModeClass", false, resetModeState, true);
		option("pollInterval", 100);
		option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
		option("historyEventDelay", 1250);
		option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
		option("maxHighlightLength", 10000, resetModeState, true);
		option("moveInputWithCursor", true, function (cm, val) {
			if (!val) { cm.display.input.resetPosition(); }
		});

		option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
		option("autofocus", null);
		option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
		option("phrases", null);
	}

	function dragDropChanged(cm, value, old) {
		var wasOn = old && old != Init;
		if (!value != !wasOn) {
			var funcs = cm.display.dragFunctions;
			var toggle = value ? on : off;
			toggle(cm.display.scroller, "dragstart", funcs.start);
			toggle(cm.display.scroller, "dragenter", funcs.enter);
			toggle(cm.display.scroller, "dragover", funcs.over);
			toggle(cm.display.scroller, "dragleave", funcs.leave);
			toggle(cm.display.scroller, "drop", funcs.drop);
		}
	}

	function wrappingChanged(cm) {
		if (cm.options.lineWrapping) {
			addClass(cm.display.wrapper, "CodeMirror-wrap");
			cm.display.sizer.style.minWidth = "";
			cm.display.sizerWidth = null;
		} else {
			rmClass(cm.display.wrapper, "CodeMirror-wrap");
			findMaxLine(cm);
		}
		estimateLineHeights(cm);
		regChange(cm);
		clearCaches(cm);
		setTimeout(function () { return updateScrollbars(cm); }, 100);
	}

	// A CodeMirror instance represents an editor. This is the object
	// that user code is usually dealing with.

	function CodeMirror(place, options) {
		var this$1 = this;

		if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }

		this.options = options = options ? copyObj(options) : {};
		// Determine effective options based on given values and defaults.
		copyObj(defaults, options, false);

		var doc = options.value;
		if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
		else if (options.mode) { doc.modeOption = options.mode; }
		this.doc = doc;

		var input = new CodeMirror.inputStyles[options.inputStyle](this);
		var display = this.display = new Display(place, doc, input, options);
		display.wrapper.CodeMirror = this;
		themeChanged(this);
		if (options.lineWrapping)
			{ this.display.wrapper.className += " CodeMirror-wrap"; }
		initScrollbars(this);

		this.state = {
			keyMaps: [],  // stores maps added by addKeyMap
			overlays: [], // highlighting overlays, as added by addOverlay
			modeGen: 0,   // bumped when mode/overlay changes, used to invalidate highlighting info
			overwrite: false,
			delayingBlurEvent: false,
			focused: false,
			suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
			pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
			selectingText: false,
			draggingText: false,
			highlight: new Delayed(), // stores highlight worker timeout
			keySeq: null,  // Unfinished key sequence
			specialChars: null
		};

		if (options.autofocus && !mobile) { display.input.focus(); }

		// Override magic textarea content restore that IE sometimes does
		// on our hidden textarea on reload
		if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }

		registerEventHandlers(this);
		ensureGlobalHandlers();

		startOperation(this);
		this.curOp.forceUpdate = true;
		attachDoc(this, doc);

		if ((options.autofocus && !mobile) || this.hasFocus())
			{ setTimeout(bind(onFocus, this), 20); }
		else
			{ onBlur(this); }

		for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
			{ optionHandlers[opt](this$1, options[opt], Init); } }
		maybeUpdateLineNumberWidth(this);
		if (options.finishInit) { options.finishInit(this); }
		for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this$1); }
		endOperation(this);
		// Suppress optimizelegibility in Webkit, since it breaks text
		// measuring on line wrapping boundaries.
		if (webkit && options.lineWrapping &&
				getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
			{ display.lineDiv.style.textRendering = "auto"; }
	}

	// The default configuration options.
	CodeMirror.defaults = defaults;
	// Functions to run when options are changed.
	CodeMirror.optionHandlers = optionHandlers;

	// Attach the necessary event handlers when initializing the editor
	function registerEventHandlers(cm) {
		var d = cm.display;
		on(d.scroller, "mousedown", operation(cm, onMouseDown));
		// Older IE's will not fire a second mousedown for a double click
		if (ie && ie_version < 11)
			{ on(d.scroller, "dblclick", operation(cm, function (e) {
				if (signalDOMEvent(cm, e)) { return }
				var pos = posFromMouse(cm, e);
				if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
				e_preventDefault(e);
				var word = cm.findWordAt(pos);
				extendSelection(cm.doc, word.anchor, word.head);
			})); }
		else
			{ on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
		// Some browsers fire contextmenu *after* opening the menu, at
		// which point we can't mess with it anymore. Context menu is
		// handled in onMouseDown for these browsers.
		on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); });

		// Used to suppress mouse event handling when a touch happens
		var touchFinished, prevTouch = {end: 0};
		function finishTouch() {
			if (d.activeTouch) {
				touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
				prevTouch = d.activeTouch;
				prevTouch.end = +new Date;
			}
		}
		function isMouseLikeTouchEvent(e) {
			if (e.touches.length != 1) { return false }
			var touch = e.touches[0];
			return touch.radiusX <= 1 && touch.radiusY <= 1
		}
		function farAway(touch, other) {
			if (other.left == null) { return true }
			var dx = other.left - touch.left, dy = other.top - touch.top;
			return dx * dx + dy * dy > 20 * 20
		}
		on(d.scroller, "touchstart", function (e) {
			if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
				d.input.ensurePolled();
				clearTimeout(touchFinished);
				var now = +new Date;
				d.activeTouch = {start: now, moved: false,
												 prev: now - prevTouch.end <= 300 ? prevTouch : null};
				if (e.touches.length == 1) {
					d.activeTouch.left = e.touches[0].pageX;
					d.activeTouch.top = e.touches[0].pageY;
				}
			}
		});
		on(d.scroller, "touchmove", function () {
			if (d.activeTouch) { d.activeTouch.moved = true; }
		});
		on(d.scroller, "touchend", function (e) {
			var touch = d.activeTouch;
			if (touch && !eventInWidget(d, e) && touch.left != null &&
					!touch.moved && new Date - touch.start < 300) {
				var pos = cm.coordsChar(d.activeTouch, "page"), range;
				if (!touch.prev || farAway(touch, touch.prev)) // Single tap
					{ range = new Range(pos, pos); }
				else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
					{ range = cm.findWordAt(pos); }
				else // Triple tap
					{ range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
				cm.setSelection(range.anchor, range.head);
				cm.focus();
				e_preventDefault(e);
			}
			finishTouch();
		});
		on(d.scroller, "touchcancel", finishTouch);

		// Sync scrolling between fake scrollbars and real scrollable
		// area, ensure viewport is updated when scrolling.
		on(d.scroller, "scroll", function () {
			if (d.scroller.clientHeight) {
				updateScrollTop(cm, d.scroller.scrollTop);
				setScrollLeft(cm, d.scroller.scrollLeft, true);
				signal(cm, "scroll", cm);
			}
		});

		// Listen to wheel events in order to try and update the viewport on time.
		on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
		on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });

		// Prevent wrapper from ever scrolling
		on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });

		d.dragFunctions = {
			enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
			over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
			start: function (e) { return onDragStart(cm, e); },
			drop: operation(cm, onDrop),
			leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
		};

		var inp = d.input.getField();
		on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
		on(inp, "keydown", operation(cm, onKeyDown));
		on(inp, "keypress", operation(cm, onKeyPress));
		on(inp, "focus", function (e) { return onFocus(cm, e); });
		on(inp, "blur", function (e) { return onBlur(cm, e); });
	}

	var initHooks = [];
	CodeMirror.defineInitHook = function (f) { return initHooks.push(f); };

	// Indent the given line. The how parameter can be "smart",
	// "add"/null, "subtract", or "prev". When aggressive is false
	// (typically set to true for forced single-line indents), empty
	// lines are not indented, and places where the mode returns Pass
	// are left alone.
	function indentLine(cm, n, how, aggressive) {
		var doc = cm.doc, state;
		if (how == null) { how = "add"; }
		if (how == "smart") {
			// Fall back to "prev" when the mode doesn't have an indentation
			// method.
			if (!doc.mode.indent) { how = "prev"; }
			else { state = getContextBefore(cm, n).state; }
		}

		var tabSize = cm.options.tabSize;
		var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
		if (line.stateAfter) { line.stateAfter = null; }
		var curSpaceString = line.text.match(/^\s*/)[0], indentation;
		if (!aggressive && !/\S/.test(line.text)) {
			indentation = 0;
			how = "not";
		} else if (how == "smart") {
			indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
			if (indentation == Pass || indentation > 150) {
				if (!aggressive) { return }
				how = "prev";
			}
		}
		if (how == "prev") {
			if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
			else { indentation = 0; }
		} else if (how == "add") {
			indentation = curSpace + cm.options.indentUnit;
		} else if (how == "subtract") {
			indentation = curSpace - cm.options.indentUnit;
		} else if (typeof how == "number") {
			indentation = curSpace + how;
		}
		indentation = Math.max(0, indentation);

		var indentString = "", pos = 0;
		if (cm.options.indentWithTabs)
			{ for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
		if (pos < indentation) { indentString += spaceStr(indentation - pos); }

		if (indentString != curSpaceString) {
			replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
			line.stateAfter = null;
			return true
		} else {
			// Ensure that, if the cursor was in the whitespace at the start
			// of the line, it is moved to the end of that space.
			for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
				var range = doc.sel.ranges[i$1];
				if (range.head.line == n && range.head.ch < curSpaceString.length) {
					var pos$1 = Pos(n, curSpaceString.length);
					replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
					break
				}
			}
		}
	}

	// This will be set to a {lineWise: bool, text: [string]} object, so
	// that, when pasting, we know what kind of selections the copied
	// text was made out of.
	var lastCopied = null;

	function setLastCopied(newLastCopied) {
		lastCopied = newLastCopied;
	}

	function applyTextInput(cm, inserted, deleted, sel, origin) {
		var doc = cm.doc;
		cm.display.shift = false;
		if (!sel) { sel = doc.sel; }

		var recent = +new Date - 200;
		var paste = origin == "paste" || cm.state.pasteIncoming > recent;
		var textLines = splitLinesAuto(inserted), multiPaste = null;
		// When pasting N lines into N selections, insert one line per selection
		if (paste && sel.ranges.length > 1) {
			if (lastCopied && lastCopied.text.join("\n") == inserted) {
				if (sel.ranges.length % lastCopied.text.length == 0) {
					multiPaste = [];
					for (var i = 0; i < lastCopied.text.length; i++)
						{ multiPaste.push(doc.splitLines(lastCopied.text[i])); }
				}
			} else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
				multiPaste = map(textLines, function (l) { return [l]; });
			}
		}

		var updateInput = cm.curOp.updateInput;
		// Normal behavior is to insert the new text into every selection
		for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
			var range$$1 = sel.ranges[i$1];
			var from = range$$1.from(), to = range$$1.to();
			if (range$$1.empty()) {
				if (deleted && deleted > 0) // Handle deletion
					{ from = Pos(from.line, from.ch - deleted); }
				else if (cm.state.overwrite && !paste) // Handle overwrite
					{ to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
				else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted)
					{ from = to = Pos(from.line, 0); }
			}
			var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
												 origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")};
			makeChange(cm.doc, changeEvent);
			signalLater(cm, "inputRead", cm, changeEvent);
		}
		if (inserted && !paste)
			{ triggerElectric(cm, inserted); }

		ensureCursorVisible(cm);
		if (cm.curOp.updateInput < 2) { cm.curOp.updateInput = updateInput; }
		cm.curOp.typing = true;
		cm.state.pasteIncoming = cm.state.cutIncoming = -1;
	}

	function handlePaste(e, cm) {
		var pasted = e.clipboardData && e.clipboardData.getData("Text");
		if (pasted) {
			e.preventDefault();
			if (!cm.isReadOnly() && !cm.options.disableInput)
				{ runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
			return true
		}
	}

	function triggerElectric(cm, inserted) {
		// When an 'electric' character is inserted, immediately trigger a reindent
		if (!cm.options.electricChars || !cm.options.smartIndent) { return }
		var sel = cm.doc.sel;

		for (var i = sel.ranges.length - 1; i >= 0; i--) {
			var range$$1 = sel.ranges[i];
			if (range$$1.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range$$1.head.line)) { continue }
			var mode = cm.getModeAt(range$$1.head);
			var indented = false;
			if (mode.electricChars) {
				for (var j = 0; j < mode.electricChars.length; j++)
					{ if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
						indented = indentLine(cm, range$$1.head.line, "smart");
						break
					} }
			} else if (mode.electricInput) {
				if (mode.electricInput.test(getLine(cm.doc, range$$1.head.line).text.slice(0, range$$1.head.ch)))
					{ indented = indentLine(cm, range$$1.head.line, "smart"); }
			}
			if (indented) { signalLater(cm, "electricInput", cm, range$$1.head.line); }
		}
	}

	function copyableRanges(cm) {
		var text = [], ranges = [];
		for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
			var line = cm.doc.sel.ranges[i].head.line;
			var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
			ranges.push(lineRange);
			text.push(cm.getRange(lineRange.anchor, lineRange.head));
		}
		return {text: text, ranges: ranges}
	}

	function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
		field.setAttribute("autocorrect", autocorrect ? "" : "off");
		field.setAttribute("autocapitalize", autocapitalize ? "" : "off");
		field.setAttribute("spellcheck", !!spellcheck);
	}

	function hiddenTextarea() {
		var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none");
		var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
		// The textarea is kept positioned near the cursor to prevent the
		// fact that it'll be scrolled into view on input from scrolling
		// our fake cursor out of view. On webkit, when wrap=off, paste is
		// very slow. So make the area wide instead.
		if (webkit) { te.style.width = "1000px"; }
		else { te.setAttribute("wrap", "off"); }
		// If border: 0; -- iOS fails to open keyboard (issue #1287)
		if (ios) { te.style.border = "1px solid black"; }
		disableBrowserMagic(te);
		return div
	}

	// The publicly visible API. Note that methodOp(f) means
	// 'wrap f in an operation, performed on its `this` parameter'.

	// This is not the complete set of editor methods. Most of the
	// methods defined on the Doc type are also injected into
	// CodeMirror.prototype, for backwards compatibility and
	// convenience.

	function addEditorMethods(CodeMirror) {
		var optionHandlers = CodeMirror.optionHandlers;

		var helpers = CodeMirror.helpers = {};

		CodeMirror.prototype = {
			constructor: CodeMirror,
			focus: function(){window.focus(); this.display.input.focus();},

			setOption: function(option, value) {
				var options = this.options, old = options[option];
				if (options[option] == value && option != "mode") { return }
				options[option] = value;
				if (optionHandlers.hasOwnProperty(option))
					{ operation(this, optionHandlers[option])(this, value, old); }
				signal(this, "optionChange", this, option);
			},

			getOption: function(option) {return this.options[option]},
			getDoc: function() {return this.doc},

			addKeyMap: function(map$$1, bottom) {
				this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map$$1));
			},
			removeKeyMap: function(map$$1) {
				var maps = this.state.keyMaps;
				for (var i = 0; i < maps.length; ++i)
					{ if (maps[i] == map$$1 || maps[i].name == map$$1) {
						maps.splice(i, 1);
						return true
					} }
			},

			addOverlay: methodOp(function(spec, options) {
				var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
				if (mode.startState) { throw new Error("Overlays may not be stateful.") }
				insertSorted(this.state.overlays,
										 {mode: mode, modeSpec: spec, opaque: options && options.opaque,
											priority: (options && options.priority) || 0},
										 function (overlay) { return overlay.priority; });
				this.state.modeGen++;
				regChange(this);
			}),
			removeOverlay: methodOp(function(spec) {
				var this$1 = this;

				var overlays = this.state.overlays;
				for (var i = 0; i < overlays.length; ++i) {
					var cur = overlays[i].modeSpec;
					if (cur == spec || typeof spec == "string" && cur.name == spec) {
						overlays.splice(i, 1);
						this$1.state.modeGen++;
						regChange(this$1);
						return
					}
				}
			}),

			indentLine: methodOp(function(n, dir, aggressive) {
				if (typeof dir != "string" && typeof dir != "number") {
					if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
					else { dir = dir ? "add" : "subtract"; }
				}
				if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
			}),
			indentSelection: methodOp(function(how) {
				var this$1 = this;

				var ranges = this.doc.sel.ranges, end = -1;
				for (var i = 0; i < ranges.length; i++) {
					var range$$1 = ranges[i];
					if (!range$$1.empty()) {
						var from = range$$1.from(), to = range$$1.to();
						var start = Math.max(end, from.line);
						end = Math.min(this$1.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
						for (var j = start; j < end; ++j)
							{ indentLine(this$1, j, how); }
						var newRanges = this$1.doc.sel.ranges;
						if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
							{ replaceOneSelection(this$1.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
					} else if (range$$1.head.line > end) {
						indentLine(this$1, range$$1.head.line, how, true);
						end = range$$1.head.line;
						if (i == this$1.doc.sel.primIndex) { ensureCursorVisible(this$1); }
					}
				}
			}),

			// Fetch the parser token for a given character. Useful for hacks
			// that want to inspect the mode state (say, for completion).
			getTokenAt: function(pos, precise) {
				return takeToken(this, pos, precise)
			},

			getLineTokens: function(line, precise) {
				return takeToken(this, Pos(line), precise, true)
			},

			getTokenTypeAt: function(pos) {
				pos = clipPos(this.doc, pos);
				var styles = getLineStyles(this, getLine(this.doc, pos.line));
				var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
				var type;
				if (ch == 0) { type = styles[2]; }
				else { for (;;) {
					var mid = (before + after) >> 1;
					if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
					else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
					else { type = styles[mid * 2 + 2]; break }
				} }
				var cut = type ? type.indexOf("overlay ") : -1;
				return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
			},

			getModeAt: function(pos) {
				var mode = this.doc.mode;
				if (!mode.innerMode) { return mode }
				return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
			},

			getHelper: function(pos, type) {
				return this.getHelpers(pos, type)[0]
			},

			getHelpers: function(pos, type) {
				var this$1 = this;

				var found = [];
				if (!helpers.hasOwnProperty(type)) { return found }
				var help = helpers[type], mode = this.getModeAt(pos);
				if (typeof mode[type] == "string") {
					if (help[mode[type]]) { found.push(help[mode[type]]); }
				} else if (mode[type]) {
					for (var i = 0; i < mode[type].length; i++) {
						var val = help[mode[type][i]];
						if (val) { found.push(val); }
					}
				} else if (mode.helperType && help[mode.helperType]) {
					found.push(help[mode.helperType]);
				} else if (help[mode.name]) {
					found.push(help[mode.name]);
				}
				for (var i$1 = 0; i$1 < help._global.length; i$1++) {
					var cur = help._global[i$1];
					if (cur.pred(mode, this$1) && indexOf(found, cur.val) == -1)
						{ found.push(cur.val); }
				}
				return found
			},

			getStateAfter: function(line, precise) {
				var doc = this.doc;
				line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
				return getContextBefore(this, line + 1, precise).state
			},

			cursorCoords: function(start, mode) {
				var pos, range$$1 = this.doc.sel.primary();
				if (start == null) { pos = range$$1.head; }
				else if (typeof start == "object") { pos = clipPos(this.doc, start); }
				else { pos = start ? range$$1.from() : range$$1.to(); }
				return cursorCoords(this, pos, mode || "page")
			},

			charCoords: function(pos, mode) {
				return charCoords(this, clipPos(this.doc, pos), mode || "page")
			},

			coordsChar: function(coords, mode) {
				coords = fromCoordSystem(this, coords, mode || "page");
				return coordsChar(this, coords.left, coords.top)
			},

			lineAtHeight: function(height, mode) {
				height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
				return lineAtHeight(this.doc, height + this.display.viewOffset)
			},
			heightAtLine: function(line, mode, includeWidgets) {
				var end = false, lineObj;
				if (typeof line == "number") {
					var last = this.doc.first + this.doc.size - 1;
					if (line < this.doc.first) { line = this.doc.first; }
					else if (line > last) { line = last; end = true; }
					lineObj = getLine(this.doc, line);
				} else {
					lineObj = line;
				}
				return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
					(end ? this.doc.height - heightAtLine(lineObj) : 0)
			},

			defaultTextHeight: function() { return textHeight(this.display) },
			defaultCharWidth: function() { return charWidth(this.display) },

			getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},

			addWidget: function(pos, node, scroll, vert, horiz) {
				var display = this.display;
				pos = cursorCoords(this, clipPos(this.doc, pos));
				var top = pos.bottom, left = pos.left;
				node.style.position = "absolute";
				node.setAttribute("cm-ignore-events", "true");
				this.display.input.setUneditable(node);
				display.sizer.appendChild(node);
				if (vert == "over") {
					top = pos.top;
				} else if (vert == "above" || vert == "near") {
					var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
					hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
					// Default to positioning above (if specified and possible); otherwise default to positioning below
					if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
						{ top = pos.top - node.offsetHeight; }
					else if (pos.bottom + node.offsetHeight <= vspace)
						{ top = pos.bottom; }
					if (left + node.offsetWidth > hspace)
						{ left = hspace - node.offsetWidth; }
				}
				node.style.top = top + "px";
				node.style.left = node.style.right = "";
				if (horiz == "right") {
					left = display.sizer.clientWidth - node.offsetWidth;
					node.style.right = "0px";
				} else {
					if (horiz == "left") { left = 0; }
					else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
					node.style.left = left + "px";
				}
				if (scroll)
					{ scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
			},

			triggerOnKeyDown: methodOp(onKeyDown),
			triggerOnKeyPress: methodOp(onKeyPress),
			triggerOnKeyUp: onKeyUp,
			triggerOnMouseDown: methodOp(onMouseDown),

			execCommand: function(cmd) {
				if (commands.hasOwnProperty(cmd))
					{ return commands[cmd].call(null, this) }
			},

			triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),

			findPosH: function(from, amount, unit, visually) {
				var this$1 = this;

				var dir = 1;
				if (amount < 0) { dir = -1; amount = -amount; }
				var cur = clipPos(this.doc, from);
				for (var i = 0; i < amount; ++i) {
					cur = findPosH(this$1.doc, cur, dir, unit, visually);
					if (cur.hitSide) { break }
				}
				return cur
			},

			moveH: methodOp(function(dir, unit) {
				var this$1 = this;

				this.extendSelectionsBy(function (range$$1) {
					if (this$1.display.shift || this$1.doc.extend || range$$1.empty())
						{ return findPosH(this$1.doc, range$$1.head, dir, unit, this$1.options.rtlMoveVisually) }
					else
						{ return dir < 0 ? range$$1.from() : range$$1.to() }
				}, sel_move);
			}),

			deleteH: methodOp(function(dir, unit) {
				var sel = this.doc.sel, doc = this.doc;
				if (sel.somethingSelected())
					{ doc.replaceSelection("", null, "+delete"); }
				else
					{ deleteNearSelection(this, function (range$$1) {
						var other = findPosH(doc, range$$1.head, dir, unit, false);
						return dir < 0 ? {from: other, to: range$$1.head} : {from: range$$1.head, to: other}
					}); }
			}),

			findPosV: function(from, amount, unit, goalColumn) {
				var this$1 = this;

				var dir = 1, x = goalColumn;
				if (amount < 0) { dir = -1; amount = -amount; }
				var cur = clipPos(this.doc, from);
				for (var i = 0; i < amount; ++i) {
					var coords = cursorCoords(this$1, cur, "div");
					if (x == null) { x = coords.left; }
					else { coords.left = x; }
					cur = findPosV(this$1, coords, dir, unit);
					if (cur.hitSide) { break }
				}
				return cur
			},

			moveV: methodOp(function(dir, unit) {
				var this$1 = this;

				var doc = this.doc, goals = [];
				var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
				doc.extendSelectionsBy(function (range$$1) {
					if (collapse)
						{ return dir < 0 ? range$$1.from() : range$$1.to() }
					var headPos = cursorCoords(this$1, range$$1.head, "div");
					if (range$$1.goalColumn != null) { headPos.left = range$$1.goalColumn; }
					goals.push(headPos.left);
					var pos = findPosV(this$1, headPos, dir, unit);
					if (unit == "page" && range$$1 == doc.sel.primary())
						{ addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
					return pos
				}, sel_move);
				if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
					{ doc.sel.ranges[i].goalColumn = goals[i]; } }
			}),

			// Find the word at the given position (as returned by coordsChar).
			findWordAt: function(pos) {
				var doc = this.doc, line = getLine(doc, pos.line).text;
				var start = pos.ch, end = pos.ch;
				if (line) {
					var helper = this.getHelper(pos, "wordChars");
					if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
					var startChar = line.charAt(start);
					var check = isWordChar(startChar, helper)
						? function (ch) { return isWordChar(ch, helper); }
						: /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
						: function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
					while (start > 0 && check(line.charAt(start - 1))) { --start; }
					while (end < line.length && check(line.charAt(end))) { ++end; }
				}
				return new Range(Pos(pos.line, start), Pos(pos.line, end))
			},

			toggleOverwrite: function(value) {
				if (value != null && value == this.state.overwrite) { return }
				if (this.state.overwrite = !this.state.overwrite)
					{ addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
				else
					{ rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }

				signal(this, "overwriteToggle", this, this.state.overwrite);
			},
			hasFocus: function() { return this.display.input.getField() == activeElt() },
			isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },

			scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
			getScrollInfo: function() {
				var scroller = this.display.scroller;
				return {left: scroller.scrollLeft, top: scroller.scrollTop,
								height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
								width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
								clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
			},

			scrollIntoView: methodOp(function(range$$1, margin) {
				if (range$$1 == null) {
					range$$1 = {from: this.doc.sel.primary().head, to: null};
					if (margin == null) { margin = this.options.cursorScrollMargin; }
				} else if (typeof range$$1 == "number") {
					range$$1 = {from: Pos(range$$1, 0), to: null};
				} else if (range$$1.from == null) {
					range$$1 = {from: range$$1, to: null};
				}
				if (!range$$1.to) { range$$1.to = range$$1.from; }
				range$$1.margin = margin || 0;

				if (range$$1.from.line != null) {
					scrollToRange(this, range$$1);
				} else {
					scrollToCoordsRange(this, range$$1.from, range$$1.to, range$$1.margin);
				}
			}),

			setSize: methodOp(function(width, height) {
				var this$1 = this;

				var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
				if (width != null) { this.display.wrapper.style.width = interpret(width); }
				if (height != null) { this.display.wrapper.style.height = interpret(height); }
				if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
				var lineNo$$1 = this.display.viewFrom;
				this.doc.iter(lineNo$$1, this.display.viewTo, function (line) {
					if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
						{ if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo$$1, "widget"); break } } }
					++lineNo$$1;
				});
				this.curOp.forceUpdate = true;
				signal(this, "refresh", this);
			}),

			operation: function(f){return runInOp(this, f)},
			startOperation: function(){return startOperation(this)},
			endOperation: function(){return endOperation(this)},

			refresh: methodOp(function() {
				var oldHeight = this.display.cachedTextHeight;
				regChange(this);
				this.curOp.forceUpdate = true;
				clearCaches(this);
				scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
				updateGutterSpace(this.display);
				if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
					{ estimateLineHeights(this); }
				signal(this, "refresh", this);
			}),

			swapDoc: methodOp(function(doc) {
				var old = this.doc;
				old.cm = null;
				// Cancel the current text selection if any (#5821)
				if (this.state.selectingText) { this.state.selectingText(); }
				attachDoc(this, doc);
				clearCaches(this);
				this.display.input.reset();
				scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
				this.curOp.forceScroll = true;
				signalLater(this, "swapDoc", this, old);
				return old
			}),

			phrase: function(phraseText) {
				var phrases = this.options.phrases;
				return phrases && Object.prototype.hasOwnProperty.call(phrases, phraseText) ? phrases[phraseText] : phraseText
			},

			getInputField: function(){return this.display.input.getField()},
			getWrapperElement: function(){return this.display.wrapper},
			getScrollerElement: function(){return this.display.scroller},
			getGutterElement: function(){return this.display.gutters}
		};
		eventMixin(CodeMirror);

		CodeMirror.registerHelper = function(type, name, value) {
			if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
			helpers[type][name] = value;
		};
		CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
			CodeMirror.registerHelper(type, name, value);
			helpers[type]._global.push({pred: predicate, val: value});
		};
	}

	// Used for horizontal relative motion. Dir is -1 or 1 (left or
	// right), unit can be "char", "column" (like char, but doesn't
	// cross line boundaries), "word" (across next word), or "group" (to
	// the start of next group of word or non-word-non-whitespace
	// chars). The visually param controls whether, in right-to-left
	// text, direction 1 means to move towards the next index in the
	// string, or towards the character to the right of the current
	// position. The resulting position will have a hitSide=true
	// property if it reached the end of the document.
	function findPosH(doc, pos, dir, unit, visually) {
		var oldPos = pos;
		var origDir = dir;
		var lineObj = getLine(doc, pos.line);
		function findNextLine() {
			var l = pos.line + dir;
			if (l < doc.first || l >= doc.first + doc.size) { return false }
			pos = new Pos(l, pos.ch, pos.sticky);
			return lineObj = getLine(doc, l)
		}
		function moveOnce(boundToLine) {
			var next;
			if (visually) {
				next = moveVisually(doc.cm, lineObj, pos, dir);
			} else {
				next = moveLogically(lineObj, pos, dir);
			}
			if (next == null) {
				if (!boundToLine && findNextLine())
					{ pos = endOfLine(visually, doc.cm, lineObj, pos.line, dir); }
				else
					{ return false }
			} else {
				pos = next;
			}
			return true
		}

		if (unit == "char") {
			moveOnce();
		} else if (unit == "column") {
			moveOnce(true);
		} else if (unit == "word" || unit == "group") {
			var sawType = null, group = unit == "group";
			var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
			for (var first = true;; first = false) {
				if (dir < 0 && !moveOnce(!first)) { break }
				var cur = lineObj.text.charAt(pos.ch) || "\n";
				var type = isWordChar(cur, helper) ? "w"
					: group && cur == "\n" ? "n"
					: !group || /\s/.test(cur) ? null
					: "p";
				if (group && !first && !type) { type = "s"; }
				if (sawType && sawType != type) {
					if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
					break
				}

				if (type) { sawType = type; }
				if (dir > 0 && !moveOnce(!first)) { break }
			}
		}
		var result = skipAtomic(doc, pos, oldPos, origDir, true);
		if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
		return result
	}

	// For relative vertical movement. Dir may be -1 or 1. Unit can be
	// "page" or "line". The resulting position will have a hitSide=true
	// property if it reached the end of the document.
	function findPosV(cm, pos, dir, unit) {
		var doc = cm.doc, x = pos.left, y;
		if (unit == "page") {
			var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
			var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
			y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;

		} else if (unit == "line") {
			y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
		}
		var target;
		for (;;) {
			target = coordsChar(cm, x, y);
			if (!target.outside) { break }
			if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
			y += dir * 5;
		}
		return target
	}

	// CONTENTEDITABLE INPUT STYLE

	var ContentEditableInput = function(cm) {
		this.cm = cm;
		this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
		this.polling = new Delayed();
		this.composing = null;
		this.gracePeriod = false;
		this.readDOMTimeout = null;
	};

	ContentEditableInput.prototype.init = function (display) {
			var this$1 = this;

		var input = this, cm = input.cm;
		var div = input.div = display.lineDiv;
		disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize);

		on(div, "paste", function (e) {
			if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
			// IE doesn't fire input events, so we schedule a read for the pasted content in this way
			if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
		});

		on(div, "compositionstart", function (e) {
			this$1.composing = {data: e.data, done: false};
		});
		on(div, "compositionupdate", function (e) {
			if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
		});
		on(div, "compositionend", function (e) {
			if (this$1.composing) {
				if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
				this$1.composing.done = true;
			}
		});

		on(div, "touchstart", function () { return input.forceCompositionEnd(); });

		on(div, "input", function () {
			if (!this$1.composing) { this$1.readFromDOMSoon(); }
		});

		function onCopyCut(e) {
			if (signalDOMEvent(cm, e)) { return }
			if (cm.somethingSelected()) {
				setLastCopied({lineWise: false, text: cm.getSelections()});
				if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
			} else if (!cm.options.lineWiseCopyCut) {
				return
			} else {
				var ranges = copyableRanges(cm);
				setLastCopied({lineWise: true, text: ranges.text});
				if (e.type == "cut") {
					cm.operation(function () {
						cm.setSelections(ranges.ranges, 0, sel_dontScroll);
						cm.replaceSelection("", null, "cut");
					});
				}
			}
			if (e.clipboardData) {
				e.clipboardData.clearData();
				var content = lastCopied.text.join("\n");
				// iOS exposes the clipboard API, but seems to discard content inserted into it
				e.clipboardData.setData("Text", content);
				if (e.clipboardData.getData("Text") == content) {
					e.preventDefault();
					return
				}
			}
			// Old-fashioned briefly-focus-a-textarea hack
			var kludge = hiddenTextarea(), te = kludge.firstChild;
			cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
			te.value = lastCopied.text.join("\n");
			var hadFocus = document.activeElement;
			selectInput(te);
			setTimeout(function () {
				cm.display.lineSpace.removeChild(kludge);
				hadFocus.focus();
				if (hadFocus == div) { input.showPrimarySelection(); }
			}, 50);
		}
		on(div, "copy", onCopyCut);
		on(div, "cut", onCopyCut);
	};

	ContentEditableInput.prototype.prepareSelection = function () {
		var result = prepareSelection(this.cm, false);
		result.focus = this.cm.state.focused;
		return result
	};

	ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
		if (!info || !this.cm.display.view.length) { return }
		if (info.focus || takeFocus) { this.showPrimarySelection(); }
		this.showMultipleSelections(info);
	};

	ContentEditableInput.prototype.getSelection = function () {
		return this.cm.display.wrapper.ownerDocument.getSelection()
	};

	ContentEditableInput.prototype.showPrimarySelection = function () {
		var sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
		var from = prim.from(), to = prim.to();

		if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
			sel.removeAllRanges();
			return
		}

		var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
		var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
		if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
				cmp(minPos(curAnchor, curFocus), from) == 0 &&
				cmp(maxPos(curAnchor, curFocus), to) == 0)
			{ return }

		var view = cm.display.view;
		var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
				{node: view[0].measure.map[2], offset: 0};
		var end = to.line < cm.display.viewTo && posToDOM(cm, to);
		if (!end) {
			var measure = view[view.length - 1].measure;
			var map$$1 = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
			end = {node: map$$1[map$$1.length - 1], offset: map$$1[map$$1.length - 2] - map$$1[map$$1.length - 3]};
		}

		if (!start || !end) {
			sel.removeAllRanges();
			return
		}

		var old = sel.rangeCount && sel.getRangeAt(0), rng;
		try { rng = range(start.node, start.offset, end.offset, end.node); }
		catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
		if (rng) {
			if (!gecko && cm.state.focused) {
				sel.collapse(start.node, start.offset);
				if (!rng.collapsed) {
					sel.removeAllRanges();
					sel.addRange(rng);
				}
			} else {
				sel.removeAllRanges();
				sel.addRange(rng);
			}
			if (old && sel.anchorNode == null) { sel.addRange(old); }
			else if (gecko) { this.startGracePeriod(); }
		}
		this.rememberSelection();
	};

	ContentEditableInput.prototype.startGracePeriod = function () {
			var this$1 = this;

		clearTimeout(this.gracePeriod);
		this.gracePeriod = setTimeout(function () {
			this$1.gracePeriod = false;
			if (this$1.selectionChanged())
				{ this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
		}, 20);
	};

	ContentEditableInput.prototype.showMultipleSelections = function (info) {
		removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
		removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
	};

	ContentEditableInput.prototype.rememberSelection = function () {
		var sel = this.getSelection();
		this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
		this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
	};

	ContentEditableInput.prototype.selectionInEditor = function () {
		var sel = this.getSelection();
		if (!sel.rangeCount) { return false }
		var node = sel.getRangeAt(0).commonAncestorContainer;
		return contains(this.div, node)
	};

	ContentEditableInput.prototype.focus = function () {
		if (this.cm.options.readOnly != "nocursor") {
			if (!this.selectionInEditor())
				{ this.showSelection(this.prepareSelection(), true); }
			this.div.focus();
		}
	};
	ContentEditableInput.prototype.blur = function () { this.div.blur(); };
	ContentEditableInput.prototype.getField = function () { return this.div };

	ContentEditableInput.prototype.supportsTouch = function () { return true };

	ContentEditableInput.prototype.receivedFocus = function () {
		var input = this;
		if (this.selectionInEditor())
			{ this.pollSelection(); }
		else
			{ runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }

		function poll() {
			if (input.cm.state.focused) {
				input.pollSelection();
				input.polling.set(input.cm.options.pollInterval, poll);
			}
		}
		this.polling.set(this.cm.options.pollInterval, poll);
	};

	ContentEditableInput.prototype.selectionChanged = function () {
		var sel = this.getSelection();
		return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
			sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
	};

	ContentEditableInput.prototype.pollSelection = function () {
		if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
		var sel = this.getSelection(), cm = this.cm;
		// On Android Chrome (version 56, at least), backspacing into an
		// uneditable block element will put the cursor in that element,
		// and then, because it's not editable, hide the virtual keyboard.
		// Because Android doesn't allow us to actually detect backspace
		// presses in a sane way, this code checks for when that happens
		// and simulates a backspace press in this case.
		if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
			this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
			this.blur();
			this.focus();
			return
		}
		if (this.composing) { return }
		this.rememberSelection();
		var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
		var head = domToPos(cm, sel.focusNode, sel.focusOffset);
		if (anchor && head) { runInOp(cm, function () {
			setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
			if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
		}); }
	};

	ContentEditableInput.prototype.pollContent = function () {
		if (this.readDOMTimeout != null) {
			clearTimeout(this.readDOMTimeout);
			this.readDOMTimeout = null;
		}

		var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
		var from = sel.from(), to = sel.to();
		if (from.ch == 0 && from.line > cm.firstLine())
			{ from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
		if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
			{ to = Pos(to.line + 1, 0); }
		if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }

		var fromIndex, fromLine, fromNode;
		if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
			fromLine = lineNo(display.view[0].line);
			fromNode = display.view[0].node;
		} else {
			fromLine = lineNo(display.view[fromIndex].line);
			fromNode = display.view[fromIndex - 1].node.nextSibling;
		}
		var toIndex = findViewIndex(cm, to.line);
		var toLine, toNode;
		if (toIndex == display.view.length - 1) {
			toLine = display.viewTo - 1;
			toNode = display.lineDiv.lastChild;
		} else {
			toLine = lineNo(display.view[toIndex + 1].line) - 1;
			toNode = display.view[toIndex + 1].node.previousSibling;
		}

		if (!fromNode) { return false }
		var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
		var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
		while (newText.length > 1 && oldText.length > 1) {
			if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
			else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
			else { break }
		}

		var cutFront = 0, cutEnd = 0;
		var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
		while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
			{ ++cutFront; }
		var newBot = lst(newText), oldBot = lst(oldText);
		var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
														 oldBot.length - (oldText.length == 1 ? cutFront : 0));
		while (cutEnd < maxCutEnd &&
					 newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
			{ ++cutEnd; }
		// Try to move start of change to start of selection if ambiguous
		if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
			while (cutFront && cutFront > from.ch &&
						 newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
				cutFront--;
				cutEnd++;
			}
		}

		newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
		newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");

		var chFrom = Pos(fromLine, cutFront);
		var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
		if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
			replaceRange(cm.doc, newText, chFrom, chTo, "+input");
			return true
		}
	};

	ContentEditableInput.prototype.ensurePolled = function () {
		this.forceCompositionEnd();
	};
	ContentEditableInput.prototype.reset = function () {
		this.forceCompositionEnd();
	};
	ContentEditableInput.prototype.forceCompositionEnd = function () {
		if (!this.composing) { return }
		clearTimeout(this.readDOMTimeout);
		this.composing = null;
		this.updateFromDOM();
		this.div.blur();
		this.div.focus();
	};
	ContentEditableInput.prototype.readFromDOMSoon = function () {
			var this$1 = this;

		if (this.readDOMTimeout != null) { return }
		this.readDOMTimeout = setTimeout(function () {
			this$1.readDOMTimeout = null;
			if (this$1.composing) {
				if (this$1.composing.done) { this$1.composing = null; }
				else { return }
			}
			this$1.updateFromDOM();
		}, 80);
	};

	ContentEditableInput.prototype.updateFromDOM = function () {
			var this$1 = this;

		if (this.cm.isReadOnly() || !this.pollContent())
			{ runInOp(this.cm, function () { return regChange(this$1.cm); }); }
	};

	ContentEditableInput.prototype.setUneditable = function (node) {
		node.contentEditable = "false";
	};

	ContentEditableInput.prototype.onKeyPress = function (e) {
		if (e.charCode == 0 || this.composing) { return }
		e.preventDefault();
		if (!this.cm.isReadOnly())
			{ operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
	};

	ContentEditableInput.prototype.readOnlyChanged = function (val) {
		this.div.contentEditable = String(val != "nocursor");
	};

	ContentEditableInput.prototype.onContextMenu = function () {};
	ContentEditableInput.prototype.resetPosition = function () {};

	ContentEditableInput.prototype.needsContentAttribute = true;

	function posToDOM(cm, pos) {
		var view = findViewForLine(cm, pos.line);
		if (!view || view.hidden) { return null }
		var line = getLine(cm.doc, pos.line);
		var info = mapFromLineView(view, line, pos.line);

		var order = getOrder(line, cm.doc.direction), side = "left";
		if (order) {
			var partPos = getBidiPartAt(order, pos.ch);
			side = partPos % 2 ? "right" : "left";
		}
		var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
		result.offset = result.collapse == "right" ? result.end : result.start;
		return result
	}

	function isInGutter(node) {
		for (var scan = node; scan; scan = scan.parentNode)
			{ if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
		return false
	}

	function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }

	function domTextBetween(cm, from, to, fromLine, toLine) {
		var text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false;
		function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
		function close() {
			if (closing) {
				text += lineSep;
				if (extraLinebreak) { text += lineSep; }
				closing = extraLinebreak = false;
			}
		}
		function addText(str) {
			if (str) {
				close();
				text += str;
			}
		}
		function walk(node) {
			if (node.nodeType == 1) {
				var cmText = node.getAttribute("cm-text");
				if (cmText) {
					addText(cmText);
					return
				}
				var markerID = node.getAttribute("cm-marker"), range$$1;
				if (markerID) {
					var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
					if (found.length && (range$$1 = found[0].find(0)))
						{ addText(getBetween(cm.doc, range$$1.from, range$$1.to).join(lineSep)); }
					return
				}
				if (node.getAttribute("contenteditable") == "false") { return }
				var isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName);
				if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) { return }

				if (isBlock) { close(); }
				for (var i = 0; i < node.childNodes.length; i++)
					{ walk(node.childNodes[i]); }

				if (/^(pre|p)$/i.test(node.nodeName)) { extraLinebreak = true; }
				if (isBlock) { closing = true; }
			} else if (node.nodeType == 3) {
				addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "));
			}
		}
		for (;;) {
			walk(from);
			if (from == to) { break }
			from = from.nextSibling;
			extraLinebreak = false;
		}
		return text
	}

	function domToPos(cm, node, offset) {
		var lineNode;
		if (node == cm.display.lineDiv) {
			lineNode = cm.display.lineDiv.childNodes[offset];
			if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
			node = null; offset = 0;
		} else {
			for (lineNode = node;; lineNode = lineNode.parentNode) {
				if (!lineNode || lineNode == cm.display.lineDiv) { return null }
				if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
			}
		}
		for (var i = 0; i < cm.display.view.length; i++) {
			var lineView = cm.display.view[i];
			if (lineView.node == lineNode)
				{ return locateNodeInLineView(lineView, node, offset) }
		}
	}

	function locateNodeInLineView(lineView, node, offset) {
		var wrapper = lineView.text.firstChild, bad = false;
		if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
		if (node == wrapper) {
			bad = true;
			node = wrapper.childNodes[offset];
			offset = 0;
			if (!node) {
				var line = lineView.rest ? lst(lineView.rest) : lineView.line;
				return badPos(Pos(lineNo(line), line.text.length), bad)
			}
		}

		var textNode = node.nodeType == 3 ? node : null, topNode = node;
		if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
			textNode = node.firstChild;
			if (offset) { offset = textNode.nodeValue.length; }
		}
		while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
		var measure = lineView.measure, maps = measure.maps;

		function find(textNode, topNode, offset) {
			for (var i = -1; i < (maps ? maps.length : 0); i++) {
				var map$$1 = i < 0 ? measure.map : maps[i];
				for (var j = 0; j < map$$1.length; j += 3) {
					var curNode = map$$1[j + 2];
					if (curNode == textNode || curNode == topNode) {
						var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
						var ch = map$$1[j] + offset;
						if (offset < 0 || curNode != textNode) { ch = map$$1[j + (offset ? 1 : 0)]; }
						return Pos(line, ch)
					}
				}
			}
		}
		var found = find(textNode, topNode, offset);
		if (found) { return badPos(found, bad) }

		// FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
		for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
			found = find(after, after.firstChild, 0);
			if (found)
				{ return badPos(Pos(found.line, found.ch - dist), bad) }
			else
				{ dist += after.textContent.length; }
		}
		for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
			found = find(before, before.firstChild, -1);
			if (found)
				{ return badPos(Pos(found.line, found.ch + dist$1), bad) }
			else
				{ dist$1 += before.textContent.length; }
		}
	}

	// TEXTAREA INPUT STYLE

	var TextareaInput = function(cm) {
		this.cm = cm;
		// See input.poll and input.reset
		this.prevInput = "";

		// Flag that indicates whether we expect input to appear real soon
		// now (after some event like 'keypress' or 'input') and are
		// polling intensively.
		this.pollingFast = false;
		// Self-resetting timeout for the poller
		this.polling = new Delayed();
		// Used to work around IE issue with selection being forgotten when focus moves away from textarea
		this.hasSelection = false;
		this.composing = null;
	};

	TextareaInput.prototype.init = function (display) {
			var this$1 = this;

		var input = this, cm = this.cm;
		this.createField(display);
		var te = this.textarea;

		display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild);

		// Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
		if (ios) { te.style.width = "0px"; }

		on(te, "input", function () {
			if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
			input.poll();
		});

		on(te, "paste", function (e) {
			if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }

			cm.state.pasteIncoming = +new Date;
			input.fastPoll();
		});

		function prepareCopyCut(e) {
			if (signalDOMEvent(cm, e)) { return }
			if (cm.somethingSelected()) {
				setLastCopied({lineWise: false, text: cm.getSelections()});
			} else if (!cm.options.lineWiseCopyCut) {
				return
			} else {
				var ranges = copyableRanges(cm);
				setLastCopied({lineWise: true, text: ranges.text});
				if (e.type == "cut") {
					cm.setSelections(ranges.ranges, null, sel_dontScroll);
				} else {
					input.prevInput = "";
					te.value = ranges.text.join("\n");
					selectInput(te);
				}
			}
			if (e.type == "cut") { cm.state.cutIncoming = +new Date; }
		}
		on(te, "cut", prepareCopyCut);
		on(te, "copy", prepareCopyCut);

		on(display.scroller, "paste", function (e) {
			if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
			if (!te.dispatchEvent) {
				cm.state.pasteIncoming = +new Date;
				input.focus();
				return
			}

			// Pass the `paste` event to the textarea so it's handled by its event listener.
			var event = new Event("paste");
			event.clipboardData = e.clipboardData;
			te.dispatchEvent(event);
		});

		// Prevent normal selection in the editor (we handle our own)
		on(display.lineSpace, "selectstart", function (e) {
			if (!eventInWidget(display, e)) { e_preventDefault(e); }
		});

		on(te, "compositionstart", function () {
			var start = cm.getCursor("from");
			if (input.composing) { input.composing.range.clear(); }
			input.composing = {
				start: start,
				range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
			};
		});
		on(te, "compositionend", function () {
			if (input.composing) {
				input.poll();
				input.composing.range.clear();
				input.composing = null;
			}
		});
	};

	TextareaInput.prototype.createField = function (_display) {
		// Wraps and hides input textarea
		this.wrapper = hiddenTextarea();
		// The semihidden textarea that is focused when the editor is
		// focused, and receives input.
		this.textarea = this.wrapper.firstChild;
	};

	TextareaInput.prototype.prepareSelection = function () {
		// Redraw the selection and/or cursor
		var cm = this.cm, display = cm.display, doc = cm.doc;
		var result = prepareSelection(cm);

		// Move the hidden textarea near the cursor to prevent scrolling artifacts
		if (cm.options.moveInputWithCursor) {
			var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
			var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
			result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
																					headPos.top + lineOff.top - wrapOff.top));
			result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
																					 headPos.left + lineOff.left - wrapOff.left));
		}

		return result
	};

	TextareaInput.prototype.showSelection = function (drawn) {
		var cm = this.cm, display = cm.display;
		removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
		removeChildrenAndAdd(display.selectionDiv, drawn.selection);
		if (drawn.teTop != null) {
			this.wrapper.style.top = drawn.teTop + "px";
			this.wrapper.style.left = drawn.teLeft + "px";
		}
	};

	// Reset the input to correspond to the selection (or to be empty,
	// when not typing and nothing is selected)
	TextareaInput.prototype.reset = function (typing) {
		if (this.contextMenuPending || this.composing) { return }
		var cm = this.cm;
		if (cm.somethingSelected()) {
			this.prevInput = "";
			var content = cm.getSelection();
			this.textarea.value = content;
			if (cm.state.focused) { selectInput(this.textarea); }
			if (ie && ie_version >= 9) { this.hasSelection = content; }
		} else if (!typing) {
			this.prevInput = this.textarea.value = "";
			if (ie && ie_version >= 9) { this.hasSelection = null; }
		}
	};

	TextareaInput.prototype.getField = function () { return this.textarea };

	TextareaInput.prototype.supportsTouch = function () { return false };

	TextareaInput.prototype.focus = function () {
		if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
			try { this.textarea.focus(); }
			catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
		}
	};

	TextareaInput.prototype.blur = function () { this.textarea.blur(); };

	TextareaInput.prototype.resetPosition = function () {
		this.wrapper.style.top = this.wrapper.style.left = 0;
	};

	TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };

	// Poll for input changes, using the normal rate of polling. This
	// runs as long as the editor is focused.
	TextareaInput.prototype.slowPoll = function () {
			var this$1 = this;

		if (this.pollingFast) { return }
		this.polling.set(this.cm.options.pollInterval, function () {
			this$1.poll();
			if (this$1.cm.state.focused) { this$1.slowPoll(); }
		});
	};

	// When an event has just come in that is likely to add or change
	// something in the input textarea, we poll faster, to ensure that
	// the change appears on the screen quickly.
	TextareaInput.prototype.fastPoll = function () {
		var missed = false, input = this;
		input.pollingFast = true;
		function p() {
			var changed = input.poll();
			if (!changed && !missed) {missed = true; input.polling.set(60, p);}
			else {input.pollingFast = false; input.slowPoll();}
		}
		input.polling.set(20, p);
	};

	// Read input from the textarea, and update the document to match.
	// When something is selected, it is present in the textarea, and
	// selected (unless it is huge, in which case a placeholder is
	// used). When nothing is selected, the cursor sits after previously
	// seen text (can be empty), which is stored in prevInput (we must
	// not reset the textarea when typing, because that breaks IME).
	TextareaInput.prototype.poll = function () {
			var this$1 = this;

		var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
		// Since this is called a *lot*, try to bail out as cheaply as
		// possible when it is clear that nothing happened. hasSelection
		// will be the case when there is a lot of text in the textarea,
		// in which case reading its value would be expensive.
		if (this.contextMenuPending || !cm.state.focused ||
				(hasSelection(input) && !prevInput && !this.composing) ||
				cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
			{ return false }

		var text = input.value;
		// If nothing changed, bail.
		if (text == prevInput && !cm.somethingSelected()) { return false }
		// Work around nonsensical selection resetting in IE9/10, and
		// inexplicable appearance of private area unicode characters on
		// some key combos in Mac (#2689).
		if (ie && ie_version >= 9 && this.hasSelection === text ||
				mac && /[\uf700-\uf7ff]/.test(text)) {
			cm.display.input.reset();
			return false
		}

		if (cm.doc.sel == cm.display.selForContextMenu) {
			var first = text.charCodeAt(0);
			if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
			if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
		}
		// Find the part of the input that is actually new
		var same = 0, l = Math.min(prevInput.length, text.length);
		while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }

		runInOp(cm, function () {
			applyTextInput(cm, text.slice(same), prevInput.length - same,
										 null, this$1.composing ? "*compose" : null);

			// Don't leave long text in the textarea, since it makes further polling slow
			if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
			else { this$1.prevInput = text; }

			if (this$1.composing) {
				this$1.composing.range.clear();
				this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
																					 {className: "CodeMirror-composing"});
			}
		});
		return true
	};

	TextareaInput.prototype.ensurePolled = function () {
		if (this.pollingFast && this.poll()) { this.pollingFast = false; }
	};

	TextareaInput.prototype.onKeyPress = function () {
		if (ie && ie_version >= 9) { this.hasSelection = null; }
		this.fastPoll();
	};

	TextareaInput.prototype.onContextMenu = function (e) {
		var input = this, cm = input.cm, display = cm.display, te = input.textarea;
		if (input.contextMenuPending) { input.contextMenuPending(); }
		var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
		if (!pos || presto) { return } // Opera is difficult.

		// Reset the current text selection only if the click is done outside of the selection
		// and 'resetSelectionOnContextMenu' option is true.
		var reset = cm.options.resetSelectionOnContextMenu;
		if (reset && cm.doc.sel.contains(pos) == -1)
			{ operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }

		var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
		var wrapperBox = input.wrapper.offsetParent.getBoundingClientRect();
		input.wrapper.style.cssText = "position: static";
		te.style.cssText = "position: absolute; width: 30px; height: 30px;\n      top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 5) + "px;\n      z-index: 1000; background: " + (ie ? "rgba(255, 255, 255, .05)" : "transparent") + ";\n      outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
		var oldScrollY;
		if (webkit) { oldScrollY = window.scrollY; } // Work around Chrome issue (#2712)
		display.input.focus();
		if (webkit) { window.scrollTo(null, oldScrollY); }
		display.input.reset();
		// Adds "Select all" to context menu in FF
		if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
		input.contextMenuPending = rehide;
		display.selForContextMenu = cm.doc.sel;
		clearTimeout(display.detectingSelectAll);

		// Select-all will be greyed out if there's nothing to select, so
		// this adds a zero-width space so that we can later check whether
		// it got selected.
		function prepareSelectAllHack() {
			if (te.selectionStart != null) {
				var selected = cm.somethingSelected();
				var extval = "\u200b" + (selected ? te.value : "");
				te.value = "\u21da"; // Used to catch context-menu undo
				te.value = extval;
				input.prevInput = selected ? "" : "\u200b";
				te.selectionStart = 1; te.selectionEnd = extval.length;
				// Re-set this, in case some other handler touched the
				// selection in the meantime.
				display.selForContextMenu = cm.doc.sel;
			}
		}
		function rehide() {
			if (input.contextMenuPending != rehide) { return }
			input.contextMenuPending = false;
			input.wrapper.style.cssText = oldWrapperCSS;
			te.style.cssText = oldCSS;
			if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }

			// Try to detect the user choosing select-all
			if (te.selectionStart != null) {
				if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
				var i = 0, poll = function () {
					if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
							te.selectionEnd > 0 && input.prevInput == "\u200b") {
						operation(cm, selectAll)(cm);
					} else if (i++ < 10) {
						display.detectingSelectAll = setTimeout(poll, 500);
					} else {
						display.selForContextMenu = null;
						display.input.reset();
					}
				};
				display.detectingSelectAll = setTimeout(poll, 200);
			}
		}

		if (ie && ie_version >= 9) { prepareSelectAllHack(); }
		if (captureRightClick) {
			e_stop(e);
			var mouseup = function () {
				off(window, "mouseup", mouseup);
				setTimeout(rehide, 20);
			};
			on(window, "mouseup", mouseup);
		} else {
			setTimeout(rehide, 50);
		}
	};

	TextareaInput.prototype.readOnlyChanged = function (val) {
		if (!val) { this.reset(); }
		this.textarea.disabled = val == "nocursor";
	};

	TextareaInput.prototype.setUneditable = function () {};

	TextareaInput.prototype.needsContentAttribute = false;

	function fromTextArea(textarea, options) {
		options = options ? copyObj(options) : {};
		options.value = textarea.value;
		if (!options.tabindex && textarea.tabIndex)
			{ options.tabindex = textarea.tabIndex; }
		if (!options.placeholder && textarea.placeholder)
			{ options.placeholder = textarea.placeholder; }
		// Set autofocus to true if this textarea is focused, or if it has
		// autofocus and no other element is focused.
		if (options.autofocus == null) {
			var hasFocus = activeElt();
			options.autofocus = hasFocus == textarea ||
				textarea.getAttribute("autofocus") != null && hasFocus == document.body;
		}

		function save() {textarea.value = cm.getValue();}

		var realSubmit;
		if (textarea.form) {
			on(textarea.form, "submit", save);
			// Deplorable hack to make the submit method do the right thing.
			if (!options.leaveSubmitMethodAlone) {
				var form = textarea.form;
				realSubmit = form.submit;
				try {
					var wrappedSubmit = form.submit = function () {
						save();
						form.submit = realSubmit;
						form.submit();
						form.submit = wrappedSubmit;
					};
				} catch(e) {}
			}
		}

		options.finishInit = function (cm) {
			cm.save = save;
			cm.getTextArea = function () { return textarea; };
			cm.toTextArea = function () {
				cm.toTextArea = isNaN; // Prevent this from being ran twice
				save();
				textarea.parentNode.removeChild(cm.getWrapperElement());
				textarea.style.display = "";
				if (textarea.form) {
					off(textarea.form, "submit", save);
					if (typeof textarea.form.submit == "function")
						{ textarea.form.submit = realSubmit; }
				}
			};
		};

		textarea.style.display = "none";
		var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
			options);
		return cm
	}

	function addLegacyProps(CodeMirror) {
		CodeMirror.off = off;
		CodeMirror.on = on;
		CodeMirror.wheelEventPixels = wheelEventPixels;
		CodeMirror.Doc = Doc;
		CodeMirror.splitLines = splitLinesAuto;
		CodeMirror.countColumn = countColumn;
		CodeMirror.findColumn = findColumn;
		CodeMirror.isWordChar = isWordCharBasic;
		CodeMirror.Pass = Pass;
		CodeMirror.signal = signal;
		CodeMirror.Line = Line;
		CodeMirror.changeEnd = changeEnd;
		CodeMirror.scrollbarModel = scrollbarModel;
		CodeMirror.Pos = Pos;
		CodeMirror.cmpPos = cmp;
		CodeMirror.modes = modes;
		CodeMirror.mimeModes = mimeModes;
		CodeMirror.resolveMode = resolveMode;
		CodeMirror.getMode = getMode;
		CodeMirror.modeExtensions = modeExtensions;
		CodeMirror.extendMode = extendMode;
		CodeMirror.copyState = copyState;
		CodeMirror.startState = startState;
		CodeMirror.innerMode = innerMode;
		CodeMirror.commands = commands;
		CodeMirror.keyMap = keyMap;
		CodeMirror.keyName = keyName;
		CodeMirror.isModifierKey = isModifierKey;
		CodeMirror.lookupKey = lookupKey;
		CodeMirror.normalizeKeyMap = normalizeKeyMap;
		CodeMirror.StringStream = StringStream;
		CodeMirror.SharedTextMarker = SharedTextMarker;
		CodeMirror.TextMarker = TextMarker;
		CodeMirror.LineWidget = LineWidget;
		CodeMirror.e_preventDefault = e_preventDefault;
		CodeMirror.e_stopPropagation = e_stopPropagation;
		CodeMirror.e_stop = e_stop;
		CodeMirror.addClass = addClass;
		CodeMirror.contains = contains;
		CodeMirror.rmClass = rmClass;
		CodeMirror.keyNames = keyNames;
	}

	// EDITOR CONSTRUCTOR

	defineOptions(CodeMirror);

	addEditorMethods(CodeMirror);

	// Set up methods on CodeMirror's prototype to redirect to the editor's document.
	var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
	for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
		{ CodeMirror.prototype[prop] = (function(method) {
			return function() {return method.apply(this.doc, arguments)}
		})(Doc.prototype[prop]); } }

	eventMixin(Doc);
	CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};

	// Extra arguments are stored as the mode's dependencies, which is
	// used by (legacy) mechanisms like loadmode.js to automatically
	// load a mode. (Preferred mechanism is the require/define calls.)
	CodeMirror.defineMode = function(name/*, mode, …*/) {
		if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name; }
		defineMode.apply(this, arguments);
	};

	CodeMirror.defineMIME = defineMIME;

	// Minimal default mode.
	CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
	CodeMirror.defineMIME("text/plain", "null");

	// EXTENSIONS

	CodeMirror.defineExtension = function (name, func) {
		CodeMirror.prototype[name] = func;
	};
	CodeMirror.defineDocExtension = function (name, func) {
		Doc.prototype[name] = func;
	};

	CodeMirror.fromTextArea = fromTextArea;

	addLegacyProps(CodeMirror);

	CodeMirror.version = "5.48.1";

	return CodeMirror;

})));

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
	if (typeof exports == "object" && typeof module == "object") // CommonJS
		mod(require("../../lib/codemirror"));
	else if (typeof define == "function" && define.amd) // AMD
		define(["../../lib/codemirror"], mod);
	else // Plain browser env
		mod(CodeMirror);
})(function(CodeMirror) {
	"use strict";

	CodeMirror.defineOption("selectionPointer", false, function(cm, val) {
		var data = cm.state.selectionPointer;
		if (data) {
			CodeMirror.off(cm.getWrapperElement(), "mousemove", data.mousemove);
			CodeMirror.off(cm.getWrapperElement(), "mouseout", data.mouseout);
			CodeMirror.off(window, "scroll", data.windowScroll);
			cm.off("cursorActivity", reset);
			cm.off("scroll", reset);
			cm.state.selectionPointer = null;
			cm.display.lineDiv.style.cursor = "";
		}
		if (val) {
			data = cm.state.selectionPointer = {
				value: typeof val == "string" ? val : "default",
				mousemove: function(event) { mousemove(cm, event); },
				mouseout: function(event) { mouseout(cm, event); },
				windowScroll: function() { reset(cm); },
				rects: null,
				mouseX: null, mouseY: null,
				willUpdate: false
			};
			CodeMirror.on(cm.getWrapperElement(), "mousemove", data.mousemove);
			CodeMirror.on(cm.getWrapperElement(), "mouseout", data.mouseout);
			CodeMirror.on(window, "scroll", data.windowScroll);
			cm.on("cursorActivity", reset);
			cm.on("scroll", reset);
		}
	});

	function mousemove(cm, event) {
		var data = cm.state.selectionPointer;
		if (event.buttons == null ? event.which : event.buttons) {
			data.mouseX = data.mouseY = null;
		} else {
			data.mouseX = event.clientX;
			data.mouseY = event.clientY;
		}
		scheduleUpdate(cm);
	}

	function mouseout(cm, event) {
		if (!cm.getWrapperElement().contains(event.relatedTarget)) {
			var data = cm.state.selectionPointer;
			data.mouseX = data.mouseY = null;
			scheduleUpdate(cm);
		}
	}

	function reset(cm) {
		cm.state.selectionPointer.rects = null;
		scheduleUpdate(cm);
	}

	function scheduleUpdate(cm) {
		if (!cm.state.selectionPointer.willUpdate) {
			cm.state.selectionPointer.willUpdate = true;
			setTimeout(function() {
				update(cm);
				cm.state.selectionPointer.willUpdate = false;
			}, 50);
		}
	}

	function update(cm) {
		var data = cm.state.selectionPointer;
		if (!data) return;
		if (data.rects == null && data.mouseX != null) {
			data.rects = [];
			if (cm.somethingSelected()) {
				for (var sel = cm.display.selectionDiv.firstChild; sel; sel = sel.nextSibling)
					data.rects.push(sel.getBoundingClientRect());
			}
		}
		var inside = false;
		if (data.mouseX != null) for (var i = 0; i < data.rects.length; i++) {
			var rect = data.rects[i];
			if (rect.left <= data.mouseX && rect.right >= data.mouseX &&
					rect.top <= data.mouseY && rect.bottom >= data.mouseY)
				inside = true;
		}
		var cursor = inside ? data.value : "";
		if (cm.display.lineDiv.style.cursor != cursor)
			cm.display.lineDiv.style.cursor = cursor;
	}
});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
	if (typeof exports == "object" && typeof module == "object") // CommonJS
		mod(require("../../lib/codemirror"));
	else if (typeof define == "function" && define.amd) // AMD
		define(["../../lib/codemirror"], mod);
	else // Plain browser env
		mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

var htmlConfig = {
	autoSelfClosers: {'area': true, 'base': true, 'br': true, 'col': true, 'command': true,
										'embed': true, 'frame': true, 'hr': true, 'img': true, 'input': true,
										'keygen': true, 'link': true, 'meta': true, 'param': true, 'source': true,
										'track': true, 'wbr': true, 'menuitem': true},
	implicitlyClosed: {'dd': true, 'li': true, 'optgroup': true, 'option': true, 'p': true,
										 'rp': true, 'rt': true, 'tbody': true, 'td': true, 'tfoot': true,
										 'th': true, 'tr': true},
	contextGrabbers: {
		'dd': {'dd': true, 'dt': true},
		'dt': {'dd': true, 'dt': true},
		'li': {'li': true},
		'option': {'option': true, 'optgroup': true},
		'optgroup': {'optgroup': true},
		'p': {'address': true, 'article': true, 'aside': true, 'blockquote': true, 'dir': true,
					'div': true, 'dl': true, 'fieldset': true, 'footer': true, 'form': true,
					'h1': true, 'h2': true, 'h3': true, 'h4': true, 'h5': true, 'h6': true,
					'header': true, 'hgroup': true, 'hr': true, 'menu': true, 'nav': true, 'ol': true,
					'p': true, 'pre': true, 'section': true, 'table': true, 'ul': true},
		'rp': {'rp': true, 'rt': true},
		'rt': {'rp': true, 'rt': true},
		'tbody': {'tbody': true, 'tfoot': true},
		'td': {'td': true, 'th': true},
		'tfoot': {'tbody': true},
		'th': {'td': true, 'th': true},
		'thead': {'tbody': true, 'tfoot': true},
		'tr': {'tr': true}
	},
	doNotIndent: {"pre": true},
	allowUnquoted: true,
	allowMissing: true,
	caseFold: true
}

var xmlConfig = {
	autoSelfClosers: {},
	implicitlyClosed: {},
	contextGrabbers: {},
	doNotIndent: {},
	allowUnquoted: false,
	allowMissing: false,
	allowMissingTagName: false,
	caseFold: false
}

CodeMirror.defineMode("xml", function(editorConf, config_) {
	var indentUnit = editorConf.indentUnit
	var config = {}
	var defaults = config_.htmlMode ? htmlConfig : xmlConfig
	for (var prop in defaults) config[prop] = defaults[prop]
	for (var prop in config_) config[prop] = config_[prop]

	// Return variables for tokenizers
	var type, setStyle;

	function inText(stream, state) {
		function chain(parser) {
			state.tokenize = parser;
			return parser(stream, state);
		}

		var ch = stream.next();
		if (ch == "<") {
			if (stream.eat("!")) {
				if (stream.eat("[")) {
					if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));
					else return null;
				} else if (stream.match("--")) {
					return chain(inBlock("comment", "-->"));
				} else if (stream.match("DOCTYPE", true, true)) {
					stream.eatWhile(/[\w\._\-]/);
					return chain(doctype(1));
				} else {
					return null;
				}
			} else if (stream.eat("?")) {
				stream.eatWhile(/[\w\._\-]/);
				state.tokenize = inBlock("meta", "?>");
				return "meta";
			} else {
				type = stream.eat("/") ? "closeTag" : "openTag";
				state.tokenize = inTag;
				return "tag bracket";
			}
		} else if (ch == "&") {
			var ok;
			if (stream.eat("#")) {
				if (stream.eat("x")) {
					ok = stream.eatWhile(/[a-fA-F\d]/) && stream.eat(";");
				} else {
					ok = stream.eatWhile(/[\d]/) && stream.eat(";");
				}
			} else {
				ok = stream.eatWhile(/[\w\.\-:]/) && stream.eat(";");
			}
			return ok ? "atom" : "error";
		} else {
			stream.eatWhile(/[^&<]/);
			return null;
		}
	}
	inText.isInText = true;

	function inTag(stream, state) {
		var ch = stream.next();
		if (ch == ">" || (ch == "/" && stream.eat(">"))) {
			state.tokenize = inText;
			type = ch == ">" ? "endTag" : "selfcloseTag";
			return "tag bracket";
		} else if (ch == "=") {
			type = "equals";
			return null;
		} else if (ch == "<") {
			state.tokenize = inText;
			state.state = baseState;
			state.tagName = state.tagStart = null;
			var next = state.tokenize(stream, state);
			return next ? next + " tag error" : "tag error";
		} else if (/[\'\"]/.test(ch)) {
			state.tokenize = inAttribute(ch);
			state.stringStartCol = stream.column();
			return state.tokenize(stream, state);
		} else {
			stream.match(/^[^\s\u00a0=<>\"\']*[^\s\u00a0=<>\"\'\/]/);
			return "word";
		}
	}

	function inAttribute(quote) {
		var closure = function(stream, state) {
			while (!stream.eol()) {
				if (stream.next() == quote) {
					state.tokenize = inTag;
					break;
				}
			}
			return "string";
		};
		closure.isInAttribute = true;
		return closure;
	}

	function inBlock(style, terminator) {
		return function(stream, state) {
			while (!stream.eol()) {
				if (stream.match(terminator)) {
					state.tokenize = inText;
					break;
				}
				stream.next();
			}
			return style;
		}
	}

	function doctype(depth) {
		return function(stream, state) {
			var ch;
			while ((ch = stream.next()) != null) {
				if (ch == "<") {
					state.tokenize = doctype(depth + 1);
					return state.tokenize(stream, state);
				} else if (ch == ">") {
					if (depth == 1) {
						state.tokenize = inText;
						break;
					} else {
						state.tokenize = doctype(depth - 1);
						return state.tokenize(stream, state);
					}
				}
			}
			return "meta";
		};
	}

	function Context(state, tagName, startOfLine) {
		this.prev = state.context;
		this.tagName = tagName;
		this.indent = state.indented;
		this.startOfLine = startOfLine;
		if (config.doNotIndent.hasOwnProperty(tagName) || (state.context && state.context.noIndent))
			this.noIndent = true;
	}
	function popContext(state) {
		if (state.context) state.context = state.context.prev;
	}
	function maybePopContext(state, nextTagName) {
		var parentTagName;
		while (true) {
			if (!state.context) {
				return;
			}
			parentTagName = state.context.tagName;
			if (!config.contextGrabbers.hasOwnProperty(parentTagName) ||
					!config.contextGrabbers[parentTagName].hasOwnProperty(nextTagName)) {
				return;
			}
			popContext(state);
		}
	}

	function baseState(type, stream, state) {
		if (type == "openTag") {
			state.tagStart = stream.column();
			return tagNameState;
		} else if (type == "closeTag") {
			return closeTagNameState;
		} else {
			return baseState;
		}
	}
	function tagNameState(type, stream, state) {
		if (type == "word") {
			state.tagName = stream.current();
			setStyle = "tag";
			return attrState;
		} else if (config.allowMissingTagName && type == "endTag") {
			setStyle = "tag bracket";
			return attrState(type, stream, state);
		} else {
			setStyle = "error";
			return tagNameState;
		}
	}
	function closeTagNameState(type, stream, state) {
		if (type == "word") {
			var tagName = stream.current();
			if (state.context && state.context.tagName != tagName &&
					config.implicitlyClosed.hasOwnProperty(state.context.tagName))
				popContext(state);
			if ((state.context && state.context.tagName == tagName) || config.matchClosing === false) {
				setStyle = "tag";
				return closeState;
			} else {
				setStyle = "tag error";
				return closeStateErr;
			}
		} else if (config.allowMissingTagName && type == "endTag") {
			setStyle = "tag bracket";
			return closeState(type, stream, state);
		} else {
			setStyle = "error";
			return closeStateErr;
		}
	}

	function closeState(type, _stream, state) {
		if (type != "endTag") {
			setStyle = "error";
			return closeState;
		}
		popContext(state);
		return baseState;
	}
	function closeStateErr(type, stream, state) {
		setStyle = "error";
		return closeState(type, stream, state);
	}

	function attrState(type, _stream, state) {
		if (type == "word") {
			setStyle = "attribute";
			return attrEqState;
		} else if (type == "endTag" || type == "selfcloseTag") {
			var tagName = state.tagName, tagStart = state.tagStart;
			state.tagName = state.tagStart = null;
			if (type == "selfcloseTag" ||
					config.autoSelfClosers.hasOwnProperty(tagName)) {
				maybePopContext(state, tagName);
			} else {
				maybePopContext(state, tagName);
				state.context = new Context(state, tagName, tagStart == state.indented);
			}
			return baseState;
		}
		setStyle = "error";
		return attrState;
	}
	function attrEqState(type, stream, state) {
		if (type == "equals") return attrValueState;
		if (!config.allowMissing) setStyle = "error";
		return attrState(type, stream, state);
	}
	function attrValueState(type, stream, state) {
		if (type == "string") return attrContinuedState;
		if (type == "word" && config.allowUnquoted) {setStyle = "string"; return attrState;}
		setStyle = "error";
		return attrState(type, stream, state);
	}
	function attrContinuedState(type, stream, state) {
		if (type == "string") return attrContinuedState;
		return attrState(type, stream, state);
	}

	return {
		startState: function(baseIndent) {
			var state = {tokenize: inText,
									 state: baseState,
									 indented: baseIndent || 0,
									 tagName: null, tagStart: null,
									 context: null}
			if (baseIndent != null) state.baseIndent = baseIndent
			return state
		},

		token: function(stream, state) {
			if (!state.tagName && stream.sol())
				state.indented = stream.indentation();

			if (stream.eatSpace()) return null;
			type = null;
			var style = state.tokenize(stream, state);
			if ((style || type) && style != "comment") {
				setStyle = null;
				state.state = state.state(type || style, stream, state);
				if (setStyle)
					style = setStyle == "error" ? style + " error" : setStyle;
			}
			return style;
		},

		indent: function(state, textAfter, fullLine) {
			var context = state.context;
			// Indent multi-line strings (e.g. css).
			if (state.tokenize.isInAttribute) {
				if (state.tagStart == state.indented)
					return state.stringStartCol + 1;
				else
					return state.indented + indentUnit;
			}
			if (context && context.noIndent) return CodeMirror.Pass;
			if (state.tokenize != inTag && state.tokenize != inText)
				return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;
			// Indent the starts of attribute names.
			if (state.tagName) {
				if (config.multilineTagIndentPastTag !== false)
					return state.tagStart + state.tagName.length + 2;
				else
					return state.tagStart + indentUnit * (config.multilineTagIndentFactor || 1);
			}
			if (config.alignCDATA && /<!\[CDATA\[/.test(textAfter)) return 0;
			var tagAfter = textAfter && /^<(\/)?([\w_:\.-]*)/.exec(textAfter);
			if (tagAfter && tagAfter[1]) { // Closing tag spotted
				while (context) {
					if (context.tagName == tagAfter[2]) {
						context = context.prev;
						break;
					} else if (config.implicitlyClosed.hasOwnProperty(context.tagName)) {
						context = context.prev;
					} else {
						break;
					}
				}
			} else if (tagAfter) { // Opening tag spotted
				while (context) {
					var grabbers = config.contextGrabbers[context.tagName];
					if (grabbers && grabbers.hasOwnProperty(tagAfter[2]))
						context = context.prev;
					else
						break;
				}
			}
			while (context && context.prev && !context.startOfLine)
				context = context.prev;
			if (context) return context.indent + indentUnit;
			else return state.baseIndent || 0;
		},

		electricInput: /<\/[\s\w:]+>$/,
		blockCommentStart: "<!--",
		blockCommentEnd: "-->",

		configuration: config.htmlMode ? "html" : "xml",
		helperType: config.htmlMode ? "html" : "xml",

		skipAttribute: function(state) {
			if (state.state == attrValueState)
				state.state = attrState
		}
	};
});

CodeMirror.defineMIME("text/xml", "xml");
CodeMirror.defineMIME("application/xml", "xml");
if (!CodeMirror.mimeModes.hasOwnProperty("text/html"))
	CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
	if (typeof exports == "object" && typeof module == "object") // CommonJS
		mod(require("../../lib/codemirror"));
	else if (typeof define == "function" && define.amd) // AMD
		define(["../../lib/codemirror"], mod);
	else // Plain browser env
		mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("javascript", function(config, parserConfig) {
	var indentUnit = config.indentUnit;
	var statementIndent = parserConfig.statementIndent;
	var jsonldMode = parserConfig.jsonld;
	var jsonMode = parserConfig.json || jsonldMode;
	var isTS = parserConfig.typescript;
	var wordRE = parserConfig.wordCharacters || /[\w$\xa1-\uffff]/;

	// Tokenizer

	var keywords = function(){
		function kw(type) {return {type: type, style: "keyword"};}
		var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c"), D = kw("keyword d");
		var operator = kw("operator"), atom = {type: "atom", style: "atom"};

		return {
			"if": kw("if"), "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,
			"return": D, "break": D, "continue": D, "new": kw("new"), "delete": C, "void": C, "throw": C,
			"debugger": kw("debugger"), "var": kw("var"), "const": kw("var"), "let": kw("var"),
			"function": kw("function"), "catch": kw("catch"),
			"for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),
			"in": operator, "typeof": operator, "instanceof": operator,
			"true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom,
			"this": kw("this"), "class": kw("class"), "super": kw("atom"),
			"yield": C, "export": kw("export"), "import": kw("import"), "extends": C,
			"await": C
		};
	}();

	var isOperatorChar = /[+\-*&%=<>!?|~^@]/;
	var isJsonldKeyword = /^@(context|id|value|language|type|container|list|set|reverse|index|base|vocab|graph)"/;

	function readRegexp(stream) {
		var escaped = false, next, inSet = false;
		while ((next = stream.next()) != null) {
			if (!escaped) {
				if (next == "/" && !inSet) return;
				if (next == "[") inSet = true;
				else if (inSet && next == "]") inSet = false;
			}
			escaped = !escaped && next == "\\";
		}
	}

	// Used as scratch variables to communicate multiple values without
	// consing up tons of objects.
	var type, content;
	function ret(tp, style, cont) {
		type = tp; content = cont;
		return style;
	}
	function tokenBase(stream, state) {
		var ch = stream.next();
		if (ch == '"' || ch == "'") {
			state.tokenize = tokenString(ch);
			return state.tokenize(stream, state);
		} else if (ch == "." && stream.match(/^\d+(?:[eE][+\-]?\d+)?/)) {
			return ret("number", "number");
		} else if (ch == "." && stream.match("..")) {
			return ret("spread", "meta");
		} else if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
			return ret(ch);
		} else if (ch == "=" && stream.eat(">")) {
			return ret("=>", "operator");
		} else if (ch == "0" && stream.match(/^(?:x[\da-f]+|o[0-7]+|b[01]+)n?/i)) {
			return ret("number", "number");
		} else if (/\d/.test(ch)) {
			stream.match(/^\d*(?:n|(?:\.\d*)?(?:[eE][+\-]?\d+)?)?/);
			return ret("number", "number");
		} else if (ch == "/") {
			if (stream.eat("*")) {
				state.tokenize = tokenComment;
				return tokenComment(stream, state);
			} else if (stream.eat("/")) {
				stream.skipToEnd();
				return ret("comment", "comment");
			} else if (expressionAllowed(stream, state, 1)) {
				readRegexp(stream);
				stream.match(/^\b(([gimyus])(?![gimyus]*\2))+\b/);
				return ret("regexp", "string-2");
			} else {
				stream.eat("=");
				return ret("operator", "operator", stream.current());
			}
		} else if (ch == "`") {
			state.tokenize = tokenQuasi;
			return tokenQuasi(stream, state);
		} else if (ch == "#") {
			stream.skipToEnd();
			return ret("error", "error");
		} else if (isOperatorChar.test(ch)) {
			if (ch != ">" || !state.lexical || state.lexical.type != ">") {
				if (stream.eat("=")) {
					if (ch == "!" || ch == "=") stream.eat("=")
				} else if (/[<>*+\-]/.test(ch)) {
					stream.eat(ch)
					if (ch == ">") stream.eat(ch)
				}
			}
			return ret("operator", "operator", stream.current());
		} else if (wordRE.test(ch)) {
			stream.eatWhile(wordRE);
			var word = stream.current()
			if (state.lastType != ".") {
				if (keywords.propertyIsEnumerable(word)) {
					var kw = keywords[word]
					return ret(kw.type, kw.style, word)
				}
				if (word == "async" && stream.match(/^(\s|\/\*.*?\*\/)*[\[\(\w]/, false))
					return ret("async", "keyword", word)
			}
			return ret("variable", "variable", word)
		}
	}

	function tokenString(quote) {
		return function(stream, state) {
			var escaped = false, next;
			if (jsonldMode && stream.peek() == "@" && stream.match(isJsonldKeyword)){
				state.tokenize = tokenBase;
				return ret("jsonld-keyword", "meta");
			}
			while ((next = stream.next()) != null) {
				if (next == quote && !escaped) break;
				escaped = !escaped && next == "\\";
			}
			if (!escaped) state.tokenize = tokenBase;
			return ret("string", "string");
		};
	}

	function tokenComment(stream, state) {
		var maybeEnd = false, ch;
		while (ch = stream.next()) {
			if (ch == "/" && maybeEnd) {
				state.tokenize = tokenBase;
				break;
			}
			maybeEnd = (ch == "*");
		}
		return ret("comment", "comment");
	}

	function tokenQuasi(stream, state) {
		var escaped = false, next;
		while ((next = stream.next()) != null) {
			if (!escaped && (next == "`" || next == "$" && stream.eat("{"))) {
				state.tokenize = tokenBase;
				break;
			}
			escaped = !escaped && next == "\\";
		}
		return ret("quasi", "string-2", stream.current());
	}

	var brackets = "([{}])";
	// This is a crude lookahead trick to try and notice that we're
	// parsing the argument patterns for a fat-arrow function before we
	// actually hit the arrow token. It only works if the arrow is on
	// the same line as the arguments and there's no strange noise
	// (comments) in between. Fallback is to only notice when we hit the
	// arrow, and not declare the arguments as locals for the arrow
	// body.
	function findFatArrow(stream, state) {
		if (state.fatArrowAt) state.fatArrowAt = null;
		var arrow = stream.string.indexOf("=>", stream.start);
		if (arrow < 0) return;

		if (isTS) { // Try to skip TypeScript return type declarations after the arguments
			var m = /:\s*(?:\w+(?:<[^>]*>|\[\])?|\{[^}]*\})\s*$/.exec(stream.string.slice(stream.start, arrow))
			if (m) arrow = m.index
		}

		var depth = 0, sawSomething = false;
		for (var pos = arrow - 1; pos >= 0; --pos) {
			var ch = stream.string.charAt(pos);
			var bracket = brackets.indexOf(ch);
			if (bracket >= 0 && bracket < 3) {
				if (!depth) { ++pos; break; }
				if (--depth == 0) { if (ch == "(") sawSomething = true; break; }
			} else if (bracket >= 3 && bracket < 6) {
				++depth;
			} else if (wordRE.test(ch)) {
				sawSomething = true;
			} else if (/["'\/]/.test(ch)) {
				return;
			} else if (sawSomething && !depth) {
				++pos;
				break;
			}
		}
		if (sawSomething && !depth) state.fatArrowAt = pos;
	}

	// Parser

	var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true, "this": true, "jsonld-keyword": true};

	function JSLexical(indented, column, type, align, prev, info) {
		this.indented = indented;
		this.column = column;
		this.type = type;
		this.prev = prev;
		this.info = info;
		if (align != null) this.align = align;
	}

	function inScope(state, varname) {
		for (var v = state.localVars; v; v = v.next)
			if (v.name == varname) return true;
		for (var cx = state.context; cx; cx = cx.prev) {
			for (var v = cx.vars; v; v = v.next)
				if (v.name == varname) return true;
		}
	}

	function parseJS(state, style, type, content, stream) {
		var cc = state.cc;
		// Communicate our context to the combinators.
		// (Less wasteful than consing up a hundred closures on every call.)
		cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc; cx.style = style;

		if (!state.lexical.hasOwnProperty("align"))
			state.lexical.align = true;

		while(true) {
			var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;
			if (combinator(type, content)) {
				while(cc.length && cc[cc.length - 1].lex)
					cc.pop()();
				if (cx.marked) return cx.marked;
				if (type == "variable" && inScope(state, content)) return "variable-2";
				return style;
			}
		}
	}

	// Combinator utils

	var cx = {state: null, column: null, marked: null, cc: null};
	function pass() {
		for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);
	}
	function cont() {
		pass.apply(null, arguments);
		return true;
	}
	function inList(name, list) {
		for (var v = list; v; v = v.next) if (v.name == name) return true
		return false;
	}
	function register(varname) {
		var state = cx.state;
		cx.marked = "def";
		if (state.context) {
			if (state.lexical.info == "var" && state.context && state.context.block) {
				// FIXME function decls are also not block scoped
				var newContext = registerVarScoped(varname, state.context)
				if (newContext != null) {
					state.context = newContext
					return
				}
			} else if (!inList(varname, state.localVars)) {
				state.localVars = new Var(varname, state.localVars)
				return
			}
		}
		// Fall through means this is global
		if (parserConfig.globalVars && !inList(varname, state.globalVars))
			state.globalVars = new Var(varname, state.globalVars)
	}
	function registerVarScoped(varname, context) {
		if (!context) {
			return null
		} else if (context.block) {
			var inner = registerVarScoped(varname, context.prev)
			if (!inner) return null
			if (inner == context.prev) return context
			return new Context(inner, context.vars, true)
		} else if (inList(varname, context.vars)) {
			return context
		} else {
			return new Context(context.prev, new Var(varname, context.vars), false)
		}
	}

	function isModifier(name) {
		return name == "public" || name == "private" || name == "protected" || name == "abstract" || name == "readonly"
	}

	// Combinators

	function Context(prev, vars, block) { this.prev = prev; this.vars = vars; this.block = block }
	function Var(name, next) { this.name = name; this.next = next }

	var defaultVars = new Var("this", new Var("arguments", null))
	function pushcontext() {
		cx.state.context = new Context(cx.state.context, cx.state.localVars, false)
		cx.state.localVars = defaultVars
	}
	function pushblockcontext() {
		cx.state.context = new Context(cx.state.context, cx.state.localVars, true)
		cx.state.localVars = null
	}
	function popcontext() {
		cx.state.localVars = cx.state.context.vars
		cx.state.context = cx.state.context.prev
	}
	popcontext.lex = true
	function pushlex(type, info) {
		var result = function() {
			var state = cx.state, indent = state.indented;
			if (state.lexical.type == "stat") indent = state.lexical.indented;
			else for (var outer = state.lexical; outer && outer.type == ")" && outer.align; outer = outer.prev)
				indent = outer.indented;
			state.lexical = new JSLexical(indent, cx.stream.column(), type, null, state.lexical, info);
		};
		result.lex = true;
		return result;
	}
	function poplex() {
		var state = cx.state;
		if (state.lexical.prev) {
			if (state.lexical.type == ")")
				state.indented = state.lexical.indented;
			state.lexical = state.lexical.prev;
		}
	}
	poplex.lex = true;

	function expect(wanted) {
		function exp(type) {
			if (type == wanted) return cont();
			else if (wanted == ";" || type == "}" || type == ")" || type == "]") return pass();
			else return cont(exp);
		};
		return exp;
	}

	function statement(type, value) {
		if (type == "var") return cont(pushlex("vardef", value), vardef, expect(";"), poplex);
		if (type == "keyword a") return cont(pushlex("form"), parenExpr, statement, poplex);
		if (type == "keyword b") return cont(pushlex("form"), statement, poplex);
		if (type == "keyword d") return cx.stream.match(/^\s*$/, false) ? cont() : cont(pushlex("stat"), maybeexpression, expect(";"), poplex);
		if (type == "debugger") return cont(expect(";"));
		if (type == "{") return cont(pushlex("}"), pushblockcontext, block, poplex, popcontext);
		if (type == ";") return cont();
		if (type == "if") {
			if (cx.state.lexical.info == "else" && cx.state.cc[cx.state.cc.length - 1] == poplex)
				cx.state.cc.pop()();
			return cont(pushlex("form"), parenExpr, statement, poplex, maybeelse);
		}
		if (type == "function") return cont(functiondef);
		if (type == "for") return cont(pushlex("form"), forspec, statement, poplex);
		if (type == "class" || (isTS && value == "interface")) {
			cx.marked = "keyword"
			return cont(pushlex("form", type == "class" ? type : value), className, poplex)
		}
		if (type == "variable") {
			if (isTS && value == "declare") {
				cx.marked = "keyword"
				return cont(statement)
			} else if (isTS && (value == "module" || value == "enum" || value == "type") && cx.stream.match(/^\s*\w/, false)) {
				cx.marked = "keyword"
				if (value == "enum") return cont(enumdef);
				else if (value == "type") return cont(typename, expect("operator"), typeexpr, expect(";"));
				else return cont(pushlex("form"), pattern, expect("{"), pushlex("}"), block, poplex, poplex)
			} else if (isTS && value == "namespace") {
				cx.marked = "keyword"
				return cont(pushlex("form"), expression, statement, poplex)
			} else if (isTS && value == "abstract") {
				cx.marked = "keyword"
				return cont(statement)
			} else {
				return cont(pushlex("stat"), maybelabel);
			}
		}
		if (type == "switch") return cont(pushlex("form"), parenExpr, expect("{"), pushlex("}", "switch"), pushblockcontext,
																			block, poplex, poplex, popcontext);
		if (type == "case") return cont(expression, expect(":"));
		if (type == "default") return cont(expect(":"));
		if (type == "catch") return cont(pushlex("form"), pushcontext, maybeCatchBinding, statement, poplex, popcontext);
		if (type == "export") return cont(pushlex("stat"), afterExport, poplex);
		if (type == "import") return cont(pushlex("stat"), afterImport, poplex);
		if (type == "async") return cont(statement)
		if (value == "@") return cont(expression, statement)
		return pass(pushlex("stat"), expression, expect(";"), poplex);
	}
	function maybeCatchBinding(type) {
		if (type == "(") return cont(funarg, expect(")"))
	}
	function expression(type, value) {
		return expressionInner(type, value, false);
	}
	function expressionNoComma(type, value) {
		return expressionInner(type, value, true);
	}
	function parenExpr(type) {
		if (type != "(") return pass()
		return cont(pushlex(")"), expression, expect(")"), poplex)
	}
	function expressionInner(type, value, noComma) {
		if (cx.state.fatArrowAt == cx.stream.start) {
			var body = noComma ? arrowBodyNoComma : arrowBody;
			if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, expect("=>"), body, popcontext);
			else if (type == "variable") return pass(pushcontext, pattern, expect("=>"), body, popcontext);
		}

		var maybeop = noComma ? maybeoperatorNoComma : maybeoperatorComma;
		if (atomicTypes.hasOwnProperty(type)) return cont(maybeop);
		if (type == "function") return cont(functiondef, maybeop);
		if (type == "class" || (isTS && value == "interface")) { cx.marked = "keyword"; return cont(pushlex("form"), classExpression, poplex); }
		if (type == "keyword c" || type == "async") return cont(noComma ? expressionNoComma : expression);
		if (type == "(") return cont(pushlex(")"), maybeexpression, expect(")"), poplex, maybeop);
		if (type == "operator" || type == "spread") return cont(noComma ? expressionNoComma : expression);
		if (type == "[") return cont(pushlex("]"), arrayLiteral, poplex, maybeop);
		if (type == "{") return contCommasep(objprop, "}", null, maybeop);
		if (type == "quasi") return pass(quasi, maybeop);
		if (type == "new") return cont(maybeTarget(noComma));
		if (type == "import") return cont(expression);
		return cont();
	}
	function maybeexpression(type) {
		if (type.match(/[;\}\)\],]/)) return pass();
		return pass(expression);
	}

	function maybeoperatorComma(type, value) {
		if (type == ",") return cont(expression);
		return maybeoperatorNoComma(type, value, false);
	}
	function maybeoperatorNoComma(type, value, noComma) {
		var me = noComma == false ? maybeoperatorComma : maybeoperatorNoComma;
		var expr = noComma == false ? expression : expressionNoComma;
		if (type == "=>") return cont(pushcontext, noComma ? arrowBodyNoComma : arrowBody, popcontext);
		if (type == "operator") {
			if (/\+\+|--/.test(value) || isTS && value == "!") return cont(me);
			if (isTS && value == "<" && cx.stream.match(/^([^>]|<.*?>)*>\s*\(/, false))
				return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, me);
			if (value == "?") return cont(expression, expect(":"), expr);
			return cont(expr);
		}
		if (type == "quasi") { return pass(quasi, me); }
		if (type == ";") return;
		if (type == "(") return contCommasep(expressionNoComma, ")", "call", me);
		if (type == ".") return cont(property, me);
		if (type == "[") return cont(pushlex("]"), maybeexpression, expect("]"), poplex, me);
		if (isTS && value == "as") { cx.marked = "keyword"; return cont(typeexpr, me) }
		if (type == "regexp") {
			cx.state.lastType = cx.marked = "operator"
			cx.stream.backUp(cx.stream.pos - cx.stream.start - 1)
			return cont(expr)
		}
	}
	function quasi(type, value) {
		if (type != "quasi") return pass();
		if (value.slice(value.length - 2) != "${") return cont(quasi);
		return cont(expression, continueQuasi);
	}
	function continueQuasi(type) {
		if (type == "}") {
			cx.marked = "string-2";
			cx.state.tokenize = tokenQuasi;
			return cont(quasi);
		}
	}
	function arrowBody(type) {
		findFatArrow(cx.stream, cx.state);
		return pass(type == "{" ? statement : expression);
	}
	function arrowBodyNoComma(type) {
		findFatArrow(cx.stream, cx.state);
		return pass(type == "{" ? statement : expressionNoComma);
	}
	function maybeTarget(noComma) {
		return function(type) {
			if (type == ".") return cont(noComma ? targetNoComma : target);
			else if (type == "variable" && isTS) return cont(maybeTypeArgs, noComma ? maybeoperatorNoComma : maybeoperatorComma)
			else return pass(noComma ? expressionNoComma : expression);
		};
	}
	function target(_, value) {
		if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorComma); }
	}
	function targetNoComma(_, value) {
		if (value == "target") { cx.marked = "keyword"; return cont(maybeoperatorNoComma); }
	}
	function maybelabel(type) {
		if (type == ":") return cont(poplex, statement);
		return pass(maybeoperatorComma, expect(";"), poplex);
	}
	function property(type) {
		if (type == "variable") {cx.marked = "property"; return cont();}
	}
	function objprop(type, value) {
		if (type == "async") {
			cx.marked = "property";
			return cont(objprop);
		} else if (type == "variable" || cx.style == "keyword") {
			cx.marked = "property";
			if (value == "get" || value == "set") return cont(getterSetter);
			var m // Work around fat-arrow-detection complication for detecting typescript typed arrow params
			if (isTS && cx.state.fatArrowAt == cx.stream.start && (m = cx.stream.match(/^\s*:\s*/, false)))
				cx.state.fatArrowAt = cx.stream.pos + m[0].length
			return cont(afterprop);
		} else if (type == "number" || type == "string") {
			cx.marked = jsonldMode ? "property" : (cx.style + " property");
			return cont(afterprop);
		} else if (type == "jsonld-keyword") {
			return cont(afterprop);
		} else if (isTS && isModifier(value)) {
			cx.marked = "keyword"
			return cont(objprop)
		} else if (type == "[") {
			return cont(expression, maybetypeOrIn, expect("]"), afterprop);
		} else if (type == "spread") {
			return cont(expressionNoComma, afterprop);
		} else if (value == "*") {
			cx.marked = "keyword";
			return cont(objprop);
		} else if (type == ":") {
			return pass(afterprop)
		}
	}
	function getterSetter(type) {
		if (type != "variable") return pass(afterprop);
		cx.marked = "property";
		return cont(functiondef);
	}
	function afterprop(type) {
		if (type == ":") return cont(expressionNoComma);
		if (type == "(") return pass(functiondef);
	}
	function commasep(what, end, sep) {
		function proceed(type, value) {
			if (sep ? sep.indexOf(type) > -1 : type == ",") {
				var lex = cx.state.lexical;
				if (lex.info == "call") lex.pos = (lex.pos || 0) + 1;
				return cont(function(type, value) {
					if (type == end || value == end) return pass()
					return pass(what)
				}, proceed);
			}
			if (type == end || value == end) return cont();
			if (sep && sep.indexOf(";") > -1) return pass(what)
			return cont(expect(end));
		}
		return function(type, value) {
			if (type == end || value == end) return cont();
			return pass(what, proceed);
		};
	}
	function contCommasep(what, end, info) {
		for (var i = 3; i < arguments.length; i++)
			cx.cc.push(arguments[i]);
		return cont(pushlex(end, info), commasep(what, end), poplex);
	}
	function block(type) {
		if (type == "}") return cont();
		return pass(statement, block);
	}
	function maybetype(type, value) {
		if (isTS) {
			if (type == ":") return cont(typeexpr);
			if (value == "?") return cont(maybetype);
		}
	}
	function maybetypeOrIn(type, value) {
		if (isTS && (type == ":" || value == "in")) return cont(typeexpr)
	}
	function mayberettype(type) {
		if (isTS && type == ":") {
			if (cx.stream.match(/^\s*\w+\s+is\b/, false)) return cont(expression, isKW, typeexpr)
			else return cont(typeexpr)
		}
	}
	function isKW(_, value) {
		if (value == "is") {
			cx.marked = "keyword"
			return cont()
		}
	}
	function typeexpr(type, value) {
		if (value == "keyof" || value == "typeof" || value == "infer") {
			cx.marked = "keyword"
			return cont(value == "typeof" ? expressionNoComma : typeexpr)
		}
		if (type == "variable" || value == "void") {
			cx.marked = "type"
			return cont(afterType)
		}
		if (value == "|" || value == "&") return cont(typeexpr)
		if (type == "string" || type == "number" || type == "atom") return cont(afterType);
		if (type == "[") return cont(pushlex("]"), commasep(typeexpr, "]", ","), poplex, afterType)
		if (type == "{") return cont(pushlex("}"), commasep(typeprop, "}", ",;"), poplex, afterType)
		if (type == "(") return cont(commasep(typearg, ")"), maybeReturnType, afterType)
		if (type == "<") return cont(commasep(typeexpr, ">"), typeexpr)
	}
	function maybeReturnType(type) {
		if (type == "=>") return cont(typeexpr)
	}
	function typeprop(type, value) {
		if (type == "variable" || cx.style == "keyword") {
			cx.marked = "property"
			return cont(typeprop)
		} else if (value == "?" || type == "number" || type == "string") {
			return cont(typeprop)
		} else if (type == ":") {
			return cont(typeexpr)
		} else if (type == "[") {
			return cont(expect("variable"), maybetype, expect("]"), typeprop)
		} else if (type == "(") {
			return pass(functiondecl, typeprop)
		}
	}
	function typearg(type, value) {
		if (type == "variable" && cx.stream.match(/^\s*[?:]/, false) || value == "?") return cont(typearg)
		if (type == ":") return cont(typeexpr)
		if (type == "spread") return cont(typearg)
		return pass(typeexpr)
	}
	function afterType(type, value) {
		if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
		if (value == "|" || type == "." || value == "&") return cont(typeexpr)
		if (type == "[") return cont(typeexpr, expect("]"), afterType)
		if (value == "extends" || value == "implements") { cx.marked = "keyword"; return cont(typeexpr) }
		if (value == "?") return cont(typeexpr, expect(":"), typeexpr)
	}
	function maybeTypeArgs(_, value) {
		if (value == "<") return cont(pushlex(">"), commasep(typeexpr, ">"), poplex, afterType)
	}
	function typeparam() {
		return pass(typeexpr, maybeTypeDefault)
	}
	function maybeTypeDefault(_, value) {
		if (value == "=") return cont(typeexpr)
	}
	function vardef(_, value) {
		if (value == "enum") {cx.marked = "keyword"; return cont(enumdef)}
		return pass(pattern, maybetype, maybeAssign, vardefCont);
	}
	function pattern(type, value) {
		if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(pattern) }
		if (type == "variable") { register(value); return cont(); }
		if (type == "spread") return cont(pattern);
		if (type == "[") return contCommasep(eltpattern, "]");
		if (type == "{") return contCommasep(proppattern, "}");
	}
	function proppattern(type, value) {
		if (type == "variable" && !cx.stream.match(/^\s*:/, false)) {
			register(value);
			return cont(maybeAssign);
		}
		if (type == "variable") cx.marked = "property";
		if (type == "spread") return cont(pattern);
		if (type == "}") return pass();
		if (type == "[") return cont(expression, expect(']'), expect(':'), proppattern);
		return cont(expect(":"), pattern, maybeAssign);
	}
	function eltpattern() {
		return pass(pattern, maybeAssign)
	}
	function maybeAssign(_type, value) {
		if (value == "=") return cont(expressionNoComma);
	}
	function vardefCont(type) {
		if (type == ",") return cont(vardef);
	}
	function maybeelse(type, value) {
		if (type == "keyword b" && value == "else") return cont(pushlex("form", "else"), statement, poplex);
	}
	function forspec(type, value) {
		if (value == "await") return cont(forspec);
		if (type == "(") return cont(pushlex(")"), forspec1, poplex);
	}
	function forspec1(type) {
		if (type == "var") return cont(vardef, forspec2);
		if (type == "variable") return cont(forspec2);
		return pass(forspec2)
	}
	function forspec2(type, value) {
		if (type == ")") return cont()
		if (type == ";") return cont(forspec2)
		if (value == "in" || value == "of") { cx.marked = "keyword"; return cont(expression, forspec2) }
		return pass(expression, forspec2)
	}
	function functiondef(type, value) {
		if (value == "*") {cx.marked = "keyword"; return cont(functiondef);}
		if (type == "variable") {register(value); return cont(functiondef);}
		if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, statement, popcontext);
		if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondef)
	}
	function functiondecl(type, value) {
		if (value == "*") {cx.marked = "keyword"; return cont(functiondecl);}
		if (type == "variable") {register(value); return cont(functiondecl);}
		if (type == "(") return cont(pushcontext, pushlex(")"), commasep(funarg, ")"), poplex, mayberettype, popcontext);
		if (isTS && value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, functiondecl)
	}
	function typename(type, value) {
		if (type == "keyword" || type == "variable") {
			cx.marked = "type"
			return cont(typename)
		} else if (value == "<") {
			return cont(pushlex(">"), commasep(typeparam, ">"), poplex)
		}
	}
	function funarg(type, value) {
		if (value == "@") cont(expression, funarg)
		if (type == "spread") return cont(funarg);
		if (isTS && isModifier(value)) { cx.marked = "keyword"; return cont(funarg); }
		if (isTS && type == "this") return cont(maybetype, maybeAssign)
		return pass(pattern, maybetype, maybeAssign);
	}
	function classExpression(type, value) {
		// Class expressions may have an optional name.
		if (type == "variable") return className(type, value);
		return classNameAfter(type, value);
	}
	function className(type, value) {
		if (type == "variable") {register(value); return cont(classNameAfter);}
	}
	function classNameAfter(type, value) {
		if (value == "<") return cont(pushlex(">"), commasep(typeparam, ">"), poplex, classNameAfter)
		if (value == "extends" || value == "implements" || (isTS && type == ",")) {
			if (value == "implements") cx.marked = "keyword";
			return cont(isTS ? typeexpr : expression, classNameAfter);
		}
		if (type == "{") return cont(pushlex("}"), classBody, poplex);
	}
	function classBody(type, value) {
		if (type == "async" ||
				(type == "variable" &&
				 (value == "static" || value == "get" || value == "set" || (isTS && isModifier(value))) &&
				 cx.stream.match(/^\s+[\w$\xa1-\uffff]/, false))) {
			cx.marked = "keyword";
			return cont(classBody);
		}
		if (type == "variable" || cx.style == "keyword") {
			cx.marked = "property";
			return cont(isTS ? classfield : functiondef, classBody);
		}
		if (type == "number" || type == "string") return cont(isTS ? classfield : functiondef, classBody);
		if (type == "[")
			return cont(expression, maybetype, expect("]"), isTS ? classfield : functiondef, classBody)
		if (value == "*") {
			cx.marked = "keyword";
			return cont(classBody);
		}
		if (isTS && type == "(") return pass(functiondecl, classBody)
		if (type == ";" || type == ",") return cont(classBody);
		if (type == "}") return cont();
		if (value == "@") return cont(expression, classBody)
	}
	function classfield(type, value) {
		if (value == "?") return cont(classfield)
		if (type == ":") return cont(typeexpr, maybeAssign)
		if (value == "=") return cont(expressionNoComma)
		var context = cx.state.lexical.prev, isInterface = context && context.info == "interface"
		return pass(isInterface ? functiondecl : functiondef)
	}
	function afterExport(type, value) {
		if (value == "*") { cx.marked = "keyword"; return cont(maybeFrom, expect(";")); }
		if (value == "default") { cx.marked = "keyword"; return cont(expression, expect(";")); }
		if (type == "{") return cont(commasep(exportField, "}"), maybeFrom, expect(";"));
		return pass(statement);
	}
	function exportField(type, value) {
		if (value == "as") { cx.marked = "keyword"; return cont(expect("variable")); }
		if (type == "variable") return pass(expressionNoComma, exportField);
	}
	function afterImport(type) {
		if (type == "string") return cont();
		if (type == "(") return pass(expression);
		return pass(importSpec, maybeMoreImports, maybeFrom);
	}
	function importSpec(type, value) {
		if (type == "{") return contCommasep(importSpec, "}");
		if (type == "variable") register(value);
		if (value == "*") cx.marked = "keyword";
		return cont(maybeAs);
	}
	function maybeMoreImports(type) {
		if (type == ",") return cont(importSpec, maybeMoreImports)
	}
	function maybeAs(_type, value) {
		if (value == "as") { cx.marked = "keyword"; return cont(importSpec); }
	}
	function maybeFrom(_type, value) {
		if (value == "from") { cx.marked = "keyword"; return cont(expression); }
	}
	function arrayLiteral(type) {
		if (type == "]") return cont();
		return pass(commasep(expressionNoComma, "]"));
	}
	function enumdef() {
		return pass(pushlex("form"), pattern, expect("{"), pushlex("}"), commasep(enummember, "}"), poplex, poplex)
	}
	function enummember() {
		return pass(pattern, maybeAssign);
	}

	function isContinuedStatement(state, textAfter) {
		return state.lastType == "operator" || state.lastType == "," ||
			isOperatorChar.test(textAfter.charAt(0)) ||
			/[,.]/.test(textAfter.charAt(0));
	}

	function expressionAllowed(stream, state, backUp) {
		return state.tokenize == tokenBase &&
			/^(?:operator|sof|keyword [bcd]|case|new|export|default|spread|[\[{}\(,;:]|=>)$/.test(state.lastType) ||
			(state.lastType == "quasi" && /\{\s*$/.test(stream.string.slice(0, stream.pos - (backUp || 0))))
	}

	// Interface

	return {
		startState: function(basecolumn) {
			var state = {
				tokenize: tokenBase,
				lastType: "sof",
				cc: [],
				lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),
				localVars: parserConfig.localVars,
				context: parserConfig.localVars && new Context(null, null, false),
				indented: basecolumn || 0
			};
			if (parserConfig.globalVars && typeof parserConfig.globalVars == "object")
				state.globalVars = parserConfig.globalVars;
			return state;
		},

		token: function(stream, state) {
			if (stream.sol()) {
				if (!state.lexical.hasOwnProperty("align"))
					state.lexical.align = false;
				state.indented = stream.indentation();
				findFatArrow(stream, state);
			}
			if (state.tokenize != tokenComment && stream.eatSpace()) return null;
			var style = state.tokenize(stream, state);
			if (type == "comment") return style;
			state.lastType = type == "operator" && (content == "++" || content == "--") ? "incdec" : type;
			return parseJS(state, style, type, content, stream);
		},

		indent: function(state, textAfter) {
			if (state.tokenize == tokenComment) return CodeMirror.Pass;
			if (state.tokenize != tokenBase) return 0;
			var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical, top
			// Kludge to prevent 'maybelse' from blocking lexical scope pops
			if (!/^\s*else\b/.test(textAfter)) for (var i = state.cc.length - 1; i >= 0; --i) {
				var c = state.cc[i];
				if (c == poplex) lexical = lexical.prev;
				else if (c != maybeelse) break;
			}
			while ((lexical.type == "stat" || lexical.type == "form") &&
						 (firstChar == "}" || ((top = state.cc[state.cc.length - 1]) &&
																	 (top == maybeoperatorComma || top == maybeoperatorNoComma) &&
																	 !/^[,\.=+\-*:?[\(]/.test(textAfter))))
				lexical = lexical.prev;
			if (statementIndent && lexical.type == ")" && lexical.prev.type == "stat")
				lexical = lexical.prev;
			var type = lexical.type, closing = firstChar == type;

			if (type == "vardef") return lexical.indented + (state.lastType == "operator" || state.lastType == "," ? lexical.info.length + 1 : 0);
			else if (type == "form" && firstChar == "{") return lexical.indented;
			else if (type == "form") return lexical.indented + indentUnit;
			else if (type == "stat")
				return lexical.indented + (isContinuedStatement(state, textAfter) ? statementIndent || indentUnit : 0);
			else if (lexical.info == "switch" && !closing && parserConfig.doubleIndentSwitch != false)
				return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);
			else if (lexical.align) return lexical.column + (closing ? 0 : 1);
			else return lexical.indented + (closing ? 0 : indentUnit);
		},

		electricInput: /^\s*(?:case .*?:|default:|\{|\})$/,
		blockCommentStart: jsonMode ? null : "/*",
		blockCommentEnd: jsonMode ? null : "*/",
		blockCommentContinue: jsonMode ? null : " * ",
		lineComment: jsonMode ? null : "//",
		fold: "brace",
		closeBrackets: "()[]{}''\"\"``",

		helperType: jsonMode ? "json" : "javascript",
		jsonldMode: jsonldMode,
		jsonMode: jsonMode,

		expressionAllowed: expressionAllowed,

		skipExpression: function(state) {
			var top = state.cc[state.cc.length - 1]
			if (top == expression || top == expressionNoComma) state.cc.pop()
		}
	};
});

CodeMirror.registerHelper("wordChars", "javascript", /[\w$]/);

CodeMirror.defineMIME("text/javascript", "javascript");
CodeMirror.defineMIME("text/ecmascript", "javascript");
CodeMirror.defineMIME("application/javascript", "javascript");
CodeMirror.defineMIME("application/x-javascript", "javascript");
CodeMirror.defineMIME("application/ecmascript", "javascript");
CodeMirror.defineMIME("application/json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/x-json", {name: "javascript", json: true});
CodeMirror.defineMIME("application/ld+json", {name: "javascript", jsonld: true});
CodeMirror.defineMIME("text/typescript", { name: "javascript", typescript: true });
CodeMirror.defineMIME("application/typescript", { name: "javascript", typescript: true });

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
	if (typeof exports == "object" && typeof module == "object") // CommonJS
		mod(require("../../lib/codemirror"));
	else if (typeof define == "function" && define.amd) // AMD
		define(["../../lib/codemirror"], mod);
	else // Plain browser env
		mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("css", function(config, parserConfig) {
	var inline = parserConfig.inline
	if (!parserConfig.propertyKeywords) parserConfig = CodeMirror.resolveMode("text/css");

	var indentUnit = config.indentUnit,
			tokenHooks = parserConfig.tokenHooks,
			documentTypes = parserConfig.documentTypes || {},
			mediaTypes = parserConfig.mediaTypes || {},
			mediaFeatures = parserConfig.mediaFeatures || {},
			mediaValueKeywords = parserConfig.mediaValueKeywords || {},
			propertyKeywords = parserConfig.propertyKeywords || {},
			nonStandardPropertyKeywords = parserConfig.nonStandardPropertyKeywords || {},
			fontProperties = parserConfig.fontProperties || {},
			counterDescriptors = parserConfig.counterDescriptors || {},
			colorKeywords = parserConfig.colorKeywords || {},
			valueKeywords = parserConfig.valueKeywords || {},
			allowNested = parserConfig.allowNested,
			lineComment = parserConfig.lineComment,
			supportsAtComponent = parserConfig.supportsAtComponent === true;

	var type, override;
	function ret(style, tp) { type = tp; return style; }

	// Tokenizers

	function tokenBase(stream, state) {
		var ch = stream.next();
		if (tokenHooks[ch]) {
			var result = tokenHooks[ch](stream, state);
			if (result !== false) return result;
		}
		if (ch == "@") {
			stream.eatWhile(/[\w\\\-]/);
			return ret("def", stream.current());
		} else if (ch == "=" || (ch == "~" || ch == "|") && stream.eat("=")) {
			return ret(null, "compare");
		} else if (ch == "\"" || ch == "'") {
			state.tokenize = tokenString(ch);
			return state.tokenize(stream, state);
		} else if (ch == "#") {
			stream.eatWhile(/[\w\\\-]/);
			return ret("atom", "hash");
		} else if (ch == "!") {
			stream.match(/^\s*\w*/);
			return ret("keyword", "important");
		} else if (/\d/.test(ch) || ch == "." && stream.eat(/\d/)) {
			stream.eatWhile(/[\w.%]/);
			return ret("number", "unit");
		} else if (ch === "-") {
			if (/[\d.]/.test(stream.peek())) {
				stream.eatWhile(/[\w.%]/);
				return ret("number", "unit");
			} else if (stream.match(/^-[\w\\\-]*/)) {
				stream.eatWhile(/[\w\\\-]/);
				if (stream.match(/^\s*:/, false))
					return ret("variable-2", "variable-definition");
				return ret("variable-2", "variable");
			} else if (stream.match(/^\w+-/)) {
				return ret("meta", "meta");
			}
		} else if (/[,+>*\/]/.test(ch)) {
			return ret(null, "select-op");
		} else if (ch == "." && stream.match(/^-?[_a-z][_a-z0-9-]*/i)) {
			return ret("qualifier", "qualifier");
		} else if (/[:;{}\[\]\(\)]/.test(ch)) {
			return ret(null, ch);
		} else if (stream.match(/[\w-.]+(?=\()/)) {
			if (/^(url(-prefix)?|domain|regexp)$/.test(stream.current().toLowerCase())) {
				state.tokenize = tokenParenthesized;
			}
			return ret("variable callee", "variable");
		} else if (/[\w\\\-]/.test(ch)) {
			stream.eatWhile(/[\w\\\-]/);
			return ret("property", "word");
		} else {
			return ret(null, null);
		}
	}

	function tokenString(quote) {
		return function(stream, state) {
			var escaped = false, ch;
			while ((ch = stream.next()) != null) {
				if (ch == quote && !escaped) {
					if (quote == ")") stream.backUp(1);
					break;
				}
				escaped = !escaped && ch == "\\";
			}
			if (ch == quote || !escaped && quote != ")") state.tokenize = null;
			return ret("string", "string");
		};
	}

	function tokenParenthesized(stream, state) {
		stream.next(); // Must be '('
		if (!stream.match(/\s*[\"\')]/, false))
			state.tokenize = tokenString(")");
		else
			state.tokenize = null;
		return ret(null, "(");
	}

	// Context management

	function Context(type, indent, prev) {
		this.type = type;
		this.indent = indent;
		this.prev = prev;
	}

	function pushContext(state, stream, type, indent) {
		state.context = new Context(type, stream.indentation() + (indent === false ? 0 : indentUnit), state.context);
		return type;
	}

	function popContext(state) {
		if (state.context.prev)
			state.context = state.context.prev;
		return state.context.type;
	}

	function pass(type, stream, state) {
		return states[state.context.type](type, stream, state);
	}
	function popAndPass(type, stream, state, n) {
		for (var i = n || 1; i > 0; i--)
			state.context = state.context.prev;
		return pass(type, stream, state);
	}

	// Parser

	function wordAsValue(stream) {
		var word = stream.current().toLowerCase();
		if (valueKeywords.hasOwnProperty(word))
			override = "atom";
		else if (colorKeywords.hasOwnProperty(word))
			override = "keyword";
		else
			override = "variable";
	}

	var states = {};

	states.top = function(type, stream, state) {
		if (type == "{") {
			return pushContext(state, stream, "block");
		} else if (type == "}" && state.context.prev) {
			return popContext(state);
		} else if (supportsAtComponent && /@component/i.test(type)) {
			return pushContext(state, stream, "atComponentBlock");
		} else if (/^@(-moz-)?document$/i.test(type)) {
			return pushContext(state, stream, "documentTypes");
		} else if (/^@(media|supports|(-moz-)?document|import)$/i.test(type)) {
			return pushContext(state, stream, "atBlock");
		} else if (/^@(font-face|counter-style)/i.test(type)) {
			state.stateArg = type;
			return "restricted_atBlock_before";
		} else if (/^@(-(moz|ms|o|webkit)-)?keyframes$/i.test(type)) {
			return "keyframes";
		} else if (type && type.charAt(0) == "@") {
			return pushContext(state, stream, "at");
		} else if (type == "hash") {
			override = "builtin";
		} else if (type == "word") {
			override = "tag";
		} else if (type == "variable-definition") {
			return "maybeprop";
		} else if (type == "interpolation") {
			return pushContext(state, stream, "interpolation");
		} else if (type == ":") {
			return "pseudo";
		} else if (allowNested && type == "(") {
			return pushContext(state, stream, "parens");
		}
		return state.context.type;
	};

	states.block = function(type, stream, state) {
		if (type == "word") {
			var word = stream.current().toLowerCase();
			if (propertyKeywords.hasOwnProperty(word)) {
				override = "property";
				return "maybeprop";
			} else if (nonStandardPropertyKeywords.hasOwnProperty(word)) {
				override = "string-2";
				return "maybeprop";
			} else if (allowNested) {
				override = stream.match(/^\s*:(?:\s|$)/, false) ? "property" : "tag";
				return "block";
			} else {
				override += " error";
				return "maybeprop";
			}
		} else if (type == "meta") {
			return "block";
		} else if (!allowNested && (type == "hash" || type == "qualifier")) {
			override = "error";
			return "block";
		} else {
			return states.top(type, stream, state);
		}
	};

	states.maybeprop = function(type, stream, state) {
		if (type == ":") return pushContext(state, stream, "prop");
		return pass(type, stream, state);
	};

	states.prop = function(type, stream, state) {
		if (type == ";") return popContext(state);
		if (type == "{" && allowNested) return pushContext(state, stream, "propBlock");
		if (type == "}" || type == "{") return popAndPass(type, stream, state);
		if (type == "(") return pushContext(state, stream, "parens");

		if (type == "hash" && !/^#([0-9a-fA-f]{3,4}|[0-9a-fA-f]{6}|[0-9a-fA-f]{8})$/.test(stream.current())) {
			override += " error";
		} else if (type == "word") {
			wordAsValue(stream);
		} else if (type == "interpolation") {
			return pushContext(state, stream, "interpolation");
		}
		return "prop";
	};

	states.propBlock = function(type, _stream, state) {
		if (type == "}") return popContext(state);
		if (type == "word") { override = "property"; return "maybeprop"; }
		return state.context.type;
	};

	states.parens = function(type, stream, state) {
		if (type == "{" || type == "}") return popAndPass(type, stream, state);
		if (type == ")") return popContext(state);
		if (type == "(") return pushContext(state, stream, "parens");
		if (type == "interpolation") return pushContext(state, stream, "interpolation");
		if (type == "word") wordAsValue(stream);
		return "parens";
	};

	states.pseudo = function(type, stream, state) {
		if (type == "meta") return "pseudo";

		if (type == "word") {
			override = "variable-3";
			return state.context.type;
		}
		return pass(type, stream, state);
	};

	states.documentTypes = function(type, stream, state) {
		if (type == "word" && documentTypes.hasOwnProperty(stream.current())) {
			override = "tag";
			return state.context.type;
		} else {
			return states.atBlock(type, stream, state);
		}
	};

	states.atBlock = function(type, stream, state) {
		if (type == "(") return pushContext(state, stream, "atBlock_parens");
		if (type == "}" || type == ";") return popAndPass(type, stream, state);
		if (type == "{") return popContext(state) && pushContext(state, stream, allowNested ? "block" : "top");

		if (type == "interpolation") return pushContext(state, stream, "interpolation");

		if (type == "word") {
			var word = stream.current().toLowerCase();
			if (word == "only" || word == "not" || word == "and" || word == "or")
				override = "keyword";
			else if (mediaTypes.hasOwnProperty(word))
				override = "attribute";
			else if (mediaFeatures.hasOwnProperty(word))
				override = "property";
			else if (mediaValueKeywords.hasOwnProperty(word))
				override = "keyword";
			else if (propertyKeywords.hasOwnProperty(word))
				override = "property";
			else if (nonStandardPropertyKeywords.hasOwnProperty(word))
				override = "string-2";
			else if (valueKeywords.hasOwnProperty(word))
				override = "atom";
			else if (colorKeywords.hasOwnProperty(word))
				override = "keyword";
			else
				override = "error";
		}
		return state.context.type;
	};

	states.atComponentBlock = function(type, stream, state) {
		if (type == "}")
			return popAndPass(type, stream, state);
		if (type == "{")
			return popContext(state) && pushContext(state, stream, allowNested ? "block" : "top", false);
		if (type == "word")
			override = "error";
		return state.context.type;
	};

	states.atBlock_parens = function(type, stream, state) {
		if (type == ")") return popContext(state);
		if (type == "{" || type == "}") return popAndPass(type, stream, state, 2);
		return states.atBlock(type, stream, state);
	};

	states.restricted_atBlock_before = function(type, stream, state) {
		if (type == "{")
			return pushContext(state, stream, "restricted_atBlock");
		if (type == "word" && state.stateArg == "@counter-style") {
			override = "variable";
			return "restricted_atBlock_before";
		}
		return pass(type, stream, state);
	};

	states.restricted_atBlock = function(type, stream, state) {
		if (type == "}") {
			state.stateArg = null;
			return popContext(state);
		}
		if (type == "word") {
			if ((state.stateArg == "@font-face" && !fontProperties.hasOwnProperty(stream.current().toLowerCase())) ||
					(state.stateArg == "@counter-style" && !counterDescriptors.hasOwnProperty(stream.current().toLowerCase())))
				override = "error";
			else
				override = "property";
			return "maybeprop";
		}
		return "restricted_atBlock";
	};

	states.keyframes = function(type, stream, state) {
		if (type == "word") { override = "variable"; return "keyframes"; }
		if (type == "{") return pushContext(state, stream, "top");
		return pass(type, stream, state);
	};

	states.at = function(type, stream, state) {
		if (type == ";") return popContext(state);
		if (type == "{" || type == "}") return popAndPass(type, stream, state);
		if (type == "word") override = "tag";
		else if (type == "hash") override = "builtin";
		return "at";
	};

	states.interpolation = function(type, stream, state) {
		if (type == "}") return popContext(state);
		if (type == "{" || type == ";") return popAndPass(type, stream, state);
		if (type == "word") override = "variable";
		else if (type != "variable" && type != "(" && type != ")") override = "error";
		return "interpolation";
	};

	return {
		startState: function(base) {
			return {tokenize: null,
							state: inline ? "block" : "top",
							stateArg: null,
							context: new Context(inline ? "block" : "top", base || 0, null)};
		},

		token: function(stream, state) {
			if (!state.tokenize && stream.eatSpace()) return null;
			var style = (state.tokenize || tokenBase)(stream, state);
			if (style && typeof style == "object") {
				type = style[1];
				style = style[0];
			}
			override = style;
			if (type != "comment")
				state.state = states[state.state](type, stream, state);
			return override;
		},

		indent: function(state, textAfter) {
			var cx = state.context, ch = textAfter && textAfter.charAt(0);
			var indent = cx.indent;
			if (cx.type == "prop" && (ch == "}" || ch == ")")) cx = cx.prev;
			if (cx.prev) {
				if (ch == "}" && (cx.type == "block" || cx.type == "top" ||
													cx.type == "interpolation" || cx.type == "restricted_atBlock")) {
					// Resume indentation from parent context.
					cx = cx.prev;
					indent = cx.indent;
				} else if (ch == ")" && (cx.type == "parens" || cx.type == "atBlock_parens") ||
						ch == "{" && (cx.type == "at" || cx.type == "atBlock")) {
					// Dedent relative to current context.
					indent = Math.max(0, cx.indent - indentUnit);
				}
			}
			return indent;
		},

		electricChars: "}",
		blockCommentStart: "/*",
		blockCommentEnd: "*/",
		blockCommentContinue: " * ",
		lineComment: lineComment,
		fold: "brace"
	};
});

	function keySet(array) {
		var keys = {};
		for (var i = 0; i < array.length; ++i) {
			keys[array[i].toLowerCase()] = true;
		}
		return keys;
	}

	var documentTypes_ = [
		"domain", "regexp", "url", "url-prefix"
	], documentTypes = keySet(documentTypes_);

	var mediaTypes_ = [
		"all", "aural", "braille", "handheld", "print", "projection", "screen",
		"tty", "tv", "embossed"
	], mediaTypes = keySet(mediaTypes_);

	var mediaFeatures_ = [
		"width", "min-width", "max-width", "height", "min-height", "max-height",
		"device-width", "min-device-width", "max-device-width", "device-height",
		"min-device-height", "max-device-height", "aspect-ratio",
		"min-aspect-ratio", "max-aspect-ratio", "device-aspect-ratio",
		"min-device-aspect-ratio", "max-device-aspect-ratio", "color", "min-color",
		"max-color", "color-index", "min-color-index", "max-color-index",
		"monochrome", "min-monochrome", "max-monochrome", "resolution",
		"min-resolution", "max-resolution", "scan", "grid", "orientation",
		"device-pixel-ratio", "min-device-pixel-ratio", "max-device-pixel-ratio",
		"pointer", "any-pointer", "hover", "any-hover"
	], mediaFeatures = keySet(mediaFeatures_);

	var mediaValueKeywords_ = [
		"landscape", "portrait", "none", "coarse", "fine", "on-demand", "hover",
		"interlace", "progressive"
	], mediaValueKeywords = keySet(mediaValueKeywords_);

	var propertyKeywords_ = [
		"align-content", "align-items", "align-self", "alignment-adjust",
		"alignment-baseline", "anchor-point", "animation", "animation-delay",
		"animation-direction", "animation-duration", "animation-fill-mode",
		"animation-iteration-count", "animation-name", "animation-play-state",
		"animation-timing-function", "appearance", "azimuth", "backface-visibility",
		"background", "background-attachment", "background-blend-mode", "background-clip",
		"background-color", "background-image", "background-origin", "background-position",
		"background-repeat", "background-size", "baseline-shift", "binding",
		"bleed", "bookmark-label", "bookmark-level", "bookmark-state",
		"bookmark-target", "border", "border-bottom", "border-bottom-color",
		"border-bottom-left-radius", "border-bottom-right-radius",
		"border-bottom-style", "border-bottom-width", "border-collapse",
		"border-color", "border-image", "border-image-outset",
		"border-image-repeat", "border-image-slice", "border-image-source",
		"border-image-width", "border-left", "border-left-color",
		"border-left-style", "border-left-width", "border-radius", "border-right",
		"border-right-color", "border-right-style", "border-right-width",
		"border-spacing", "border-style", "border-top", "border-top-color",
		"border-top-left-radius", "border-top-right-radius", "border-top-style",
		"border-top-width", "border-width", "bottom", "box-decoration-break",
		"box-shadow", "box-sizing", "break-after", "break-before", "break-inside",
		"caption-side", "caret-color", "clear", "clip", "color", "color-profile", "column-count",
		"column-fill", "column-gap", "column-rule", "column-rule-color",
		"column-rule-style", "column-rule-width", "column-span", "column-width",
		"columns", "content", "counter-increment", "counter-reset", "crop", "cue",
		"cue-after", "cue-before", "cursor", "direction", "display",
		"dominant-baseline", "drop-initial-after-adjust",
		"drop-initial-after-align", "drop-initial-before-adjust",
		"drop-initial-before-align", "drop-initial-size", "drop-initial-value",
		"elevation", "empty-cells", "fit", "fit-position", "flex", "flex-basis",
		"flex-direction", "flex-flow", "flex-grow", "flex-shrink", "flex-wrap",
		"float", "float-offset", "flow-from", "flow-into", "font", "font-feature-settings",
		"font-family", "font-kerning", "font-language-override", "font-size", "font-size-adjust",
		"font-stretch", "font-style", "font-synthesis", "font-variant",
		"font-variant-alternates", "font-variant-caps", "font-variant-east-asian",
		"font-variant-ligatures", "font-variant-numeric", "font-variant-position",
		"font-weight", "grid", "grid-area", "grid-auto-columns", "grid-auto-flow",
		"grid-auto-rows", "grid-column", "grid-column-end", "grid-column-gap",
		"grid-column-start", "grid-gap", "grid-row", "grid-row-end", "grid-row-gap",
		"grid-row-start", "grid-template", "grid-template-areas", "grid-template-columns",
		"grid-template-rows", "hanging-punctuation", "height", "hyphens",
		"icon", "image-orientation", "image-rendering", "image-resolution",
		"inline-box-align", "justify-content", "justify-items", "justify-self", "left", "letter-spacing",
		"line-break", "line-height", "line-stacking", "line-stacking-ruby",
		"line-stacking-shift", "line-stacking-strategy", "list-style",
		"list-style-image", "list-style-position", "list-style-type", "margin",
		"margin-bottom", "margin-left", "margin-right", "margin-top",
		"marks", "marquee-direction", "marquee-loop",
		"marquee-play-count", "marquee-speed", "marquee-style", "max-height",
		"max-width", "min-height", "min-width", "mix-blend-mode", "move-to", "nav-down", "nav-index",
		"nav-left", "nav-right", "nav-up", "object-fit", "object-position",
		"opacity", "order", "orphans", "outline",
		"outline-color", "outline-offset", "outline-style", "outline-width",
		"overflow", "overflow-style", "overflow-wrap", "overflow-x", "overflow-y",
		"padding", "padding-bottom", "padding-left", "padding-right", "padding-top",
		"page", "page-break-after", "page-break-before", "page-break-inside",
		"page-policy", "pause", "pause-after", "pause-before", "perspective",
		"perspective-origin", "pitch", "pitch-range", "place-content", "place-items", "place-self", "play-during", "position",
		"presentation-level", "punctuation-trim", "quotes", "region-break-after",
		"region-break-before", "region-break-inside", "region-fragment",
		"rendering-intent", "resize", "rest", "rest-after", "rest-before", "richness",
		"right", "rotation", "rotation-point", "ruby-align", "ruby-overhang",
		"ruby-position", "ruby-span", "shape-image-threshold", "shape-inside", "shape-margin",
		"shape-outside", "size", "speak", "speak-as", "speak-header",
		"speak-numeral", "speak-punctuation", "speech-rate", "stress", "string-set",
		"tab-size", "table-layout", "target", "target-name", "target-new",
		"target-position", "text-align", "text-align-last", "text-decoration",
		"text-decoration-color", "text-decoration-line", "text-decoration-skip",
		"text-decoration-style", "text-emphasis", "text-emphasis-color",
		"text-emphasis-position", "text-emphasis-style", "text-height",
		"text-indent", "text-justify", "text-outline", "text-overflow", "text-shadow",
		"text-size-adjust", "text-space-collapse", "text-transform", "text-underline-position",
		"text-wrap", "top", "transform", "transform-origin", "transform-style",
		"transition", "transition-delay", "transition-duration",
		"transition-property", "transition-timing-function", "unicode-bidi",
		"user-select", "vertical-align", "visibility", "voice-balance", "voice-duration",
		"voice-family", "voice-pitch", "voice-range", "voice-rate", "voice-stress",
		"voice-volume", "volume", "white-space", "widows", "width", "will-change", "word-break",
		"word-spacing", "word-wrap", "z-index",
		// SVG-specific
		"clip-path", "clip-rule", "mask", "enable-background", "filter", "flood-color",
		"flood-opacity", "lighting-color", "stop-color", "stop-opacity", "pointer-events",
		"color-interpolation", "color-interpolation-filters",
		"color-rendering", "fill", "fill-opacity", "fill-rule", "image-rendering",
		"marker", "marker-end", "marker-mid", "marker-start", "shape-rendering", "stroke",
		"stroke-dasharray", "stroke-dashoffset", "stroke-linecap", "stroke-linejoin",
		"stroke-miterlimit", "stroke-opacity", "stroke-width", "text-rendering",
		"baseline-shift", "dominant-baseline", "glyph-orientation-horizontal",
		"glyph-orientation-vertical", "text-anchor", "writing-mode"
	], propertyKeywords = keySet(propertyKeywords_);

	var nonStandardPropertyKeywords_ = [
		"scrollbar-arrow-color", "scrollbar-base-color", "scrollbar-dark-shadow-color",
		"scrollbar-face-color", "scrollbar-highlight-color", "scrollbar-shadow-color",
		"scrollbar-3d-light-color", "scrollbar-track-color", "shape-inside",
		"searchfield-cancel-button", "searchfield-decoration", "searchfield-results-button",
		"searchfield-results-decoration", "zoom"
	], nonStandardPropertyKeywords = keySet(nonStandardPropertyKeywords_);

	var fontProperties_ = [
		"font-family", "src", "unicode-range", "font-variant", "font-feature-settings",
		"font-stretch", "font-weight", "font-style"
	], fontProperties = keySet(fontProperties_);

	var counterDescriptors_ = [
		"additive-symbols", "fallback", "negative", "pad", "prefix", "range",
		"speak-as", "suffix", "symbols", "system"
	], counterDescriptors = keySet(counterDescriptors_);

	var colorKeywords_ = [
		"aliceblue", "antiquewhite", "aqua", "aquamarine", "azure", "beige",
		"bisque", "black", "blanchedalmond", "blue", "blueviolet", "brown",
		"burlywood", "cadetblue", "chartreuse", "chocolate", "coral", "cornflowerblue",
		"cornsilk", "crimson", "cyan", "darkblue", "darkcyan", "darkgoldenrod",
		"darkgray", "darkgreen", "darkkhaki", "darkmagenta", "darkolivegreen",
		"darkorange", "darkorchid", "darkred", "darksalmon", "darkseagreen",
		"darkslateblue", "darkslategray", "darkturquoise", "darkviolet",
		"deeppink", "deepskyblue", "dimgray", "dodgerblue", "firebrick",
		"floralwhite", "forestgreen", "fuchsia", "gainsboro", "ghostwhite",
		"gold", "goldenrod", "gray", "grey", "green", "greenyellow", "honeydew",
		"hotpink", "indianred", "indigo", "ivory", "khaki", "lavender",
		"lavenderblush", "lawngreen", "lemonchiffon", "lightblue", "lightcoral",
		"lightcyan", "lightgoldenrodyellow", "lightgray", "lightgreen", "lightpink",
		"lightsalmon", "lightseagreen", "lightskyblue", "lightslategray",
		"lightsteelblue", "lightyellow", "lime", "limegreen", "linen", "magenta",
		"maroon", "mediumaquamarine", "mediumblue", "mediumorchid", "mediumpurple",
		"mediumseagreen", "mediumslateblue", "mediumspringgreen", "mediumturquoise",
		"mediumvioletred", "midnightblue", "mintcream", "mistyrose", "moccasin",
		"navajowhite", "navy", "oldlace", "olive", "olivedrab", "orange", "orangered",
		"orchid", "palegoldenrod", "palegreen", "paleturquoise", "palevioletred",
		"papayawhip", "peachpuff", "peru", "pink", "plum", "powderblue",
		"purple", "rebeccapurple", "red", "rosybrown", "royalblue", "saddlebrown",
		"salmon", "sandybrown", "seagreen", "seashell", "sienna", "silver", "skyblue",
		"slateblue", "slategray", "snow", "springgreen", "steelblue", "tan",
		"teal", "thistle", "tomato", "turquoise", "violet", "wheat", "white",
		"whitesmoke", "yellow", "yellowgreen"
	], colorKeywords = keySet(colorKeywords_);

	var valueKeywords_ = [
		"above", "absolute", "activeborder", "additive", "activecaption", "afar",
		"after-white-space", "ahead", "alias", "all", "all-scroll", "alphabetic", "alternate",
		"always", "amharic", "amharic-abegede", "antialiased", "appworkspace",
		"arabic-indic", "armenian", "asterisks", "attr", "auto", "auto-flow", "avoid", "avoid-column", "avoid-page",
		"avoid-region", "background", "backwards", "baseline", "below", "bidi-override", "binary",
		"bengali", "blink", "block", "block-axis", "bold", "bolder", "border", "border-box",
		"both", "bottom", "break", "break-all", "break-word", "bullets", "button", "button-bevel",
		"buttonface", "buttonhighlight", "buttonshadow", "buttontext", "calc", "cambodian",
		"capitalize", "caps-lock-indicator", "caption", "captiontext", "caret",
		"cell", "center", "checkbox", "circle", "cjk-decimal", "cjk-earthly-branch",
		"cjk-heavenly-stem", "cjk-ideographic", "clear", "clip", "close-quote",
		"col-resize", "collapse", "color", "color-burn", "color-dodge", "column", "column-reverse",
		"compact", "condensed", "contain", "content", "contents",
		"content-box", "context-menu", "continuous", "copy", "counter", "counters", "cover", "crop",
		"cross", "crosshair", "currentcolor", "cursive", "cyclic", "darken", "dashed", "decimal",
		"decimal-leading-zero", "default", "default-button", "dense", "destination-atop",
		"destination-in", "destination-out", "destination-over", "devanagari", "difference",
		"disc", "discard", "disclosure-closed", "disclosure-open", "document",
		"dot-dash", "dot-dot-dash",
		"dotted", "double", "down", "e-resize", "ease", "ease-in", "ease-in-out", "ease-out",
		"element", "ellipse", "ellipsis", "embed", "end", "ethiopic", "ethiopic-abegede",
		"ethiopic-abegede-am-et", "ethiopic-abegede-gez", "ethiopic-abegede-ti-er",
		"ethiopic-abegede-ti-et", "ethiopic-halehame-aa-er",
		"ethiopic-halehame-aa-et", "ethiopic-halehame-am-et",
		"ethiopic-halehame-gez", "ethiopic-halehame-om-et",
		"ethiopic-halehame-sid-et", "ethiopic-halehame-so-et",
		"ethiopic-halehame-ti-er", "ethiopic-halehame-ti-et", "ethiopic-halehame-tig",
		"ethiopic-numeric", "ew-resize", "exclusion", "expanded", "extends", "extra-condensed",
		"extra-expanded", "fantasy", "fast", "fill", "fixed", "flat", "flex", "flex-end", "flex-start", "footnotes",
		"forwards", "from", "geometricPrecision", "georgian", "graytext", "grid", "groove",
		"gujarati", "gurmukhi", "hand", "hangul", "hangul-consonant", "hard-light", "hebrew",
		"help", "hidden", "hide", "higher", "highlight", "highlighttext",
		"hiragana", "hiragana-iroha", "horizontal", "hsl", "hsla", "hue", "icon", "ignore",
		"inactiveborder", "inactivecaption", "inactivecaptiontext", "infinite",
		"infobackground", "infotext", "inherit", "initial", "inline", "inline-axis",
		"inline-block", "inline-flex", "inline-grid", "inline-table", "inset", "inside", "intrinsic", "invert",
		"italic", "japanese-formal", "japanese-informal", "justify", "kannada",
		"katakana", "katakana-iroha", "keep-all", "khmer",
		"korean-hangul-formal", "korean-hanja-formal", "korean-hanja-informal",
		"landscape", "lao", "large", "larger", "left", "level", "lighter", "lighten",
		"line-through", "linear", "linear-gradient", "lines", "list-item", "listbox", "listitem",
		"local", "logical", "loud", "lower", "lower-alpha", "lower-armenian",
		"lower-greek", "lower-hexadecimal", "lower-latin", "lower-norwegian",
		"lower-roman", "lowercase", "ltr", "luminosity", "malayalam", "match", "matrix", "matrix3d",
		"media-controls-background", "media-current-time-display",
		"media-fullscreen-button", "media-mute-button", "media-play-button",
		"media-return-to-realtime-button", "media-rewind-button",
		"media-seek-back-button", "media-seek-forward-button", "media-slider",
		"media-sliderthumb", "media-time-remaining-display", "media-volume-slider",
		"media-volume-slider-container", "media-volume-sliderthumb", "medium",
		"menu", "menulist", "menulist-button", "menulist-text",
		"menulist-textfield", "menutext", "message-box", "middle", "min-intrinsic",
		"mix", "mongolian", "monospace", "move", "multiple", "multiply", "myanmar", "n-resize",
		"narrower", "ne-resize", "nesw-resize", "no-close-quote", "no-drop",
		"no-open-quote", "no-repeat", "none", "normal", "not-allowed", "nowrap",
		"ns-resize", "numbers", "numeric", "nw-resize", "nwse-resize", "oblique", "octal", "opacity", "open-quote",
		"optimizeLegibility", "optimizeSpeed", "oriya", "oromo", "outset",
		"outside", "outside-shape", "overlay", "overline", "padding", "padding-box",
		"painted", "page", "paused", "persian", "perspective", "plus-darker", "plus-lighter",
		"pointer", "polygon", "portrait", "pre", "pre-line", "pre-wrap", "preserve-3d",
		"progress", "push-button", "radial-gradient", "radio", "read-only",
		"read-write", "read-write-plaintext-only", "rectangle", "region",
		"relative", "repeat", "repeating-linear-gradient",
		"repeating-radial-gradient", "repeat-x", "repeat-y", "reset", "reverse",
		"rgb", "rgba", "ridge", "right", "rotate", "rotate3d", "rotateX", "rotateY",
		"rotateZ", "round", "row", "row-resize", "row-reverse", "rtl", "run-in", "running",
		"s-resize", "sans-serif", "saturation", "scale", "scale3d", "scaleX", "scaleY", "scaleZ", "screen",
		"scroll", "scrollbar", "scroll-position", "se-resize", "searchfield",
		"searchfield-cancel-button", "searchfield-decoration",
		"searchfield-results-button", "searchfield-results-decoration", "self-start", "self-end",
		"semi-condensed", "semi-expanded", "separate", "serif", "show", "sidama",
		"simp-chinese-formal", "simp-chinese-informal", "single",
		"skew", "skewX", "skewY", "skip-white-space", "slide", "slider-horizontal",
		"slider-vertical", "sliderthumb-horizontal", "sliderthumb-vertical", "slow",
		"small", "small-caps", "small-caption", "smaller", "soft-light", "solid", "somali",
		"source-atop", "source-in", "source-out", "source-over", "space", "space-around", "space-between", "space-evenly", "spell-out", "square",
		"square-button", "start", "static", "status-bar", "stretch", "stroke", "sub",
		"subpixel-antialiased", "super", "sw-resize", "symbolic", "symbols", "system-ui", "table",
		"table-caption", "table-cell", "table-column", "table-column-group",
		"table-footer-group", "table-header-group", "table-row", "table-row-group",
		"tamil",
		"telugu", "text", "text-bottom", "text-top", "textarea", "textfield", "thai",
		"thick", "thin", "threeddarkshadow", "threedface", "threedhighlight",
		"threedlightshadow", "threedshadow", "tibetan", "tigre", "tigrinya-er",
		"tigrinya-er-abegede", "tigrinya-et", "tigrinya-et-abegede", "to", "top",
		"trad-chinese-formal", "trad-chinese-informal", "transform",
		"translate", "translate3d", "translateX", "translateY", "translateZ",
		"transparent", "ultra-condensed", "ultra-expanded", "underline", "unset", "up",
		"upper-alpha", "upper-armenian", "upper-greek", "upper-hexadecimal",
		"upper-latin", "upper-norwegian", "upper-roman", "uppercase", "urdu", "url",
		"var", "vertical", "vertical-text", "visible", "visibleFill", "visiblePainted",
		"visibleStroke", "visual", "w-resize", "wait", "wave", "wider",
		"window", "windowframe", "windowtext", "words", "wrap", "wrap-reverse", "x-large", "x-small", "xor",
		"xx-large", "xx-small"
	], valueKeywords = keySet(valueKeywords_);

	var allWords = documentTypes_.concat(mediaTypes_).concat(mediaFeatures_).concat(mediaValueKeywords_)
		.concat(propertyKeywords_).concat(nonStandardPropertyKeywords_).concat(colorKeywords_)
		.concat(valueKeywords_);
	CodeMirror.registerHelper("hintWords", "css", allWords);

	function tokenCComment(stream, state) {
		var maybeEnd = false, ch;
		while ((ch = stream.next()) != null) {
			if (maybeEnd && ch == "/") {
				state.tokenize = null;
				break;
			}
			maybeEnd = (ch == "*");
		}
		return ["comment", "comment"];
	}

	CodeMirror.defineMIME("text/css", {
		documentTypes: documentTypes,
		mediaTypes: mediaTypes,
		mediaFeatures: mediaFeatures,
		mediaValueKeywords: mediaValueKeywords,
		propertyKeywords: propertyKeywords,
		nonStandardPropertyKeywords: nonStandardPropertyKeywords,
		fontProperties: fontProperties,
		counterDescriptors: counterDescriptors,
		colorKeywords: colorKeywords,
		valueKeywords: valueKeywords,
		tokenHooks: {
			"/": function(stream, state) {
				if (!stream.eat("*")) return false;
				state.tokenize = tokenCComment;
				return tokenCComment(stream, state);
			}
		},
		name: "css"
	});

	CodeMirror.defineMIME("text/x-scss", {
		mediaTypes: mediaTypes,
		mediaFeatures: mediaFeatures,
		mediaValueKeywords: mediaValueKeywords,
		propertyKeywords: propertyKeywords,
		nonStandardPropertyKeywords: nonStandardPropertyKeywords,
		colorKeywords: colorKeywords,
		valueKeywords: valueKeywords,
		fontProperties: fontProperties,
		allowNested: true,
		lineComment: "//",
		tokenHooks: {
			"/": function(stream, state) {
				if (stream.eat("/")) {
					stream.skipToEnd();
					return ["comment", "comment"];
				} else if (stream.eat("*")) {
					state.tokenize = tokenCComment;
					return tokenCComment(stream, state);
				} else {
					return ["operator", "operator"];
				}
			},
			":": function(stream) {
				if (stream.match(/\s*\{/, false))
					return [null, null]
				return false;
			},
			"$": function(stream) {
				stream.match(/^[\w-]+/);
				if (stream.match(/^\s*:/, false))
					return ["variable-2", "variable-definition"];
				return ["variable-2", "variable"];
			},
			"#": function(stream) {
				if (!stream.eat("{")) return false;
				return [null, "interpolation"];
			}
		},
		name: "css",
		helperType: "scss"
	});

	CodeMirror.defineMIME("text/x-less", {
		mediaTypes: mediaTypes,
		mediaFeatures: mediaFeatures,
		mediaValueKeywords: mediaValueKeywords,
		propertyKeywords: propertyKeywords,
		nonStandardPropertyKeywords: nonStandardPropertyKeywords,
		colorKeywords: colorKeywords,
		valueKeywords: valueKeywords,
		fontProperties: fontProperties,
		allowNested: true,
		lineComment: "//",
		tokenHooks: {
			"/": function(stream, state) {
				if (stream.eat("/")) {
					stream.skipToEnd();
					return ["comment", "comment"];
				} else if (stream.eat("*")) {
					state.tokenize = tokenCComment;
					return tokenCComment(stream, state);
				} else {
					return ["operator", "operator"];
				}
			},
			"@": function(stream) {
				if (stream.eat("{")) return [null, "interpolation"];
				if (stream.match(/^(charset|document|font-face|import|(-(moz|ms|o|webkit)-)?keyframes|media|namespace|page|supports)\b/i, false)) return false;
				stream.eatWhile(/[\w\\\-]/);
				if (stream.match(/^\s*:/, false))
					return ["variable-2", "variable-definition"];
				return ["variable-2", "variable"];
			},
			"&": function() {
				return ["atom", "atom"];
			}
		},
		name: "css",
		helperType: "less"
	});

	CodeMirror.defineMIME("text/x-gss", {
		documentTypes: documentTypes,
		mediaTypes: mediaTypes,
		mediaFeatures: mediaFeatures,
		propertyKeywords: propertyKeywords,
		nonStandardPropertyKeywords: nonStandardPropertyKeywords,
		fontProperties: fontProperties,
		counterDescriptors: counterDescriptors,
		colorKeywords: colorKeywords,
		valueKeywords: valueKeywords,
		supportsAtComponent: true,
		tokenHooks: {
			"/": function(stream, state) {
				if (!stream.eat("*")) return false;
				state.tokenize = tokenCComment;
				return tokenCComment(stream, state);
			}
		},
		name: "css",
		helperType: "gss"
	});

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

/*
For extra ASP classic objects, initialize CodeMirror instance with this option:
	isASP: true

E.G.:
	var editor = CodeMirror.fromTextArea(document.getElementById("code"), {
		lineNumbers: true,
		isASP: true
	  });
*/

(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
	mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
	define(["../../lib/codemirror"], mod);
  else // Plain browser env
	mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("vbscript", function(conf, parserConf) {
	var ERRORCLASS = 'error';

	function wordRegexp(words) {
		return new RegExp("^((" + words.join(")|(") + "))\\b", "i");
	}

	var singleOperators = new RegExp("^[\\+\\-\\*/&\\\\\\^<>=]");
	var doubleOperators = new RegExp("^((<>)|(<=)|(>=))");
	var singleDelimiters = new RegExp('^[\\.,]');
	var brakets = new RegExp('^[\\(\\)]');
	var identifiers = new RegExp("^[A-Za-z][_A-Za-z0-9]*");

	var openingKeywords = ['class','sub','select','while','if','function', 'property', 'with', 'for'];
	var middleKeywords = ['else','elseif','case'];
	var endKeywords = ['next','loop','wend'];

	var wordOperators = wordRegexp(['and', 'or', 'not', 'xor', 'is', 'mod', 'eqv', 'imp']);
	var commonkeywords = ['dim', 'redim', 'then',  'until', 'randomize',
						  'byval','byref','new','property', 'exit', 'in',
						  'const','private', 'public',
						  'get','set','let', 'stop', 'on error resume next', 'on error goto 0', 'option explicit', 'call', 'me'];

	//This list was from: http://msdn.microsoft.com/en-us/library/f8tbc79x(v=vs.84).aspx
	var atomWords = ['true', 'false', 'nothing', 'empty', 'null'];
	//This list was from: http://msdn.microsoft.com/en-us/library/3ca8tfek(v=vs.84).aspx
	var builtinFuncsWords = ['abs', 'array', 'asc', 'atn', 'cbool', 'cbyte', 'ccur', 'cdate', 'cdbl', 'chr', 'cint', 'clng', 'cos', 'csng', 'cstr', 'date', 'dateadd', 'datediff', 'datepart',
						'dateserial', 'datevalue', 'day', 'escape', 'eval', 'execute', 'exp', 'filter', 'formatcurrency', 'formatdatetime', 'formatnumber', 'formatpercent', 'getlocale', 'getobject',
						'getref', 'hex', 'hour', 'inputbox', 'instr', 'instrrev', 'int', 'fix', 'isarray', 'isdate', 'isempty', 'isnull', 'isnumeric', 'isobject', 'join', 'lbound', 'lcase', 'left',
						'len', 'loadpicture', 'log', 'ltrim', 'rtrim', 'trim', 'maths', 'mid', 'minute', 'month', 'monthname', 'msgbox', 'now', 'oct', 'replace', 'rgb', 'right', 'rnd', 'round',
						'scriptengine', 'scriptenginebuildversion', 'scriptenginemajorversion', 'scriptengineminorversion', 'second', 'setlocale', 'sgn', 'sin', 'space', 'split', 'sqr', 'strcomp',
						'string', 'strreverse', 'tan', 'time', 'timer', 'timeserial', 'timevalue', 'typename', 'ubound', 'ucase', 'unescape', 'vartype', 'weekday', 'weekdayname', 'year'];

	//This list was from: http://msdn.microsoft.com/en-us/library/ydz4cfk3(v=vs.84).aspx
	var builtinConsts = ['vbBlack', 'vbRed', 'vbGreen', 'vbYellow', 'vbBlue', 'vbMagenta', 'vbCyan', 'vbWhite', 'vbBinaryCompare', 'vbTextCompare',
						 'vbSunday', 'vbMonday', 'vbTuesday', 'vbWednesday', 'vbThursday', 'vbFriday', 'vbSaturday', 'vbUseSystemDayOfWeek', 'vbFirstJan1', 'vbFirstFourDays', 'vbFirstFullWeek',
						 'vbGeneralDate', 'vbLongDate', 'vbShortDate', 'vbLongTime', 'vbShortTime', 'vbObjectError',
						 'vbOKOnly', 'vbOKCancel', 'vbAbortRetryIgnore', 'vbYesNoCancel', 'vbYesNo', 'vbRetryCancel', 'vbCritical', 'vbQuestion', 'vbExclamation', 'vbInformation', 'vbDefaultButton1', 'vbDefaultButton2',
						 'vbDefaultButton3', 'vbDefaultButton4', 'vbApplicationModal', 'vbSystemModal', 'vbOK', 'vbCancel', 'vbAbort', 'vbRetry', 'vbIgnore', 'vbYes', 'vbNo',
						 'vbCr', 'VbCrLf', 'vbFormFeed', 'vbLf', 'vbNewLine', 'vbNullChar', 'vbNullString', 'vbTab', 'vbVerticalTab', 'vbUseDefault', 'vbTrue', 'vbFalse',
						 'vbEmpty', 'vbNull', 'vbInteger', 'vbLong', 'vbSingle', 'vbDouble', 'vbCurrency', 'vbDate', 'vbString', 'vbObject', 'vbError', 'vbBoolean', 'vbVariant', 'vbDataObject', 'vbDecimal', 'vbByte', 'vbArray'];
	//This list was from: http://msdn.microsoft.com/en-us/library/hkc375ea(v=vs.84).aspx
	var builtinObjsWords = ['WScript', 'err', 'debug', 'RegExp'];
	var knownProperties = ['description', 'firstindex', 'global', 'helpcontext', 'helpfile', 'ignorecase', 'length', 'number', 'pattern', 'source', 'value', 'count'];
	var knownMethods = ['clear', 'execute', 'raise', 'replace', 'test', 'write', 'writeline', 'close', 'open', 'state', 'eof', 'update', 'addnew', 'end', 'createobject', 'quit'];

	var aspBuiltinObjsWords = ['server', 'response', 'request', 'session', 'application'];
	var aspKnownProperties = ['buffer', 'cachecontrol', 'charset', 'contenttype', 'expires', 'expiresabsolute', 'isclientconnected', 'pics', 'status', //response
							  'clientcertificate', 'cookies', 'form', 'querystring', 'servervariables', 'totalbytes', //request
							  'contents', 'staticobjects', //application
							  'codepage', 'lcid', 'sessionid', 'timeout', //session
							  'scripttimeout']; //server
	var aspKnownMethods = ['addheader', 'appendtolog', 'binarywrite', 'end', 'flush', 'redirect', //response
						   'binaryread', //request
						   'remove', 'removeall', 'lock', 'unlock', //application
						   'abandon', //session
						   'getlasterror', 'htmlencode', 'mappath', 'transfer', 'urlencode']; //server

	var knownWords = knownMethods.concat(knownProperties);

	builtinObjsWords = builtinObjsWords.concat(builtinConsts);

	if (conf.isASP){
		builtinObjsWords = builtinObjsWords.concat(aspBuiltinObjsWords);
		knownWords = knownWords.concat(aspKnownMethods, aspKnownProperties);
	};

	var keywords = wordRegexp(commonkeywords);
	var atoms = wordRegexp(atomWords);
	var builtinFuncs = wordRegexp(builtinFuncsWords);
	var builtinObjs = wordRegexp(builtinObjsWords);
	var known = wordRegexp(knownWords);
	var stringPrefixes = '"';

	var opening = wordRegexp(openingKeywords);
	var middle = wordRegexp(middleKeywords);
	var closing = wordRegexp(endKeywords);
	var doubleClosing = wordRegexp(['end']);
	var doOpening = wordRegexp(['do']);
	var noIndentWords = wordRegexp(['on error resume next', 'exit']);
	var comment = wordRegexp(['rem']);


	function indent(_stream, state) {
	  state.currentIndent++;
	}

	function dedent(_stream, state) {
	  state.currentIndent--;
	}
	// tokenizers
	function tokenBase(stream, state) {
		if (stream.eatSpace()) {
			return 'space';
			//return null;
		}

		var ch = stream.peek();

		// Handle Comments
		if (ch === "'") {
			stream.skipToEnd();
			return 'comment';
		}
		if (stream.match(comment)){
			stream.skipToEnd();
			return 'comment';
		}


		// Handle Number Literals
		if (stream.match(/^((&H)|(&O))?[0-9\.]/i, false) && !stream.match(/^((&H)|(&O))?[0-9\.]+[a-z_]/i, false)) {
			var floatLiteral = false;
			// Floats
			if (stream.match(/^\d*\.\d+/i)) { floatLiteral = true; }
			else if (stream.match(/^\d+\.\d*/)) { floatLiteral = true; }
			else if (stream.match(/^\.\d+/)) { floatLiteral = true; }

			if (floatLiteral) {
				// Float literals may be "imaginary"
				stream.eat(/J/i);
				return 'number';
			}
			// Integers
			var intLiteral = false;
			// Hex
			if (stream.match(/^&H[0-9a-f]+/i)) { intLiteral = true; }
			// Octal
			else if (stream.match(/^&O[0-7]+/i)) { intLiteral = true; }
			// Decimal
			else if (stream.match(/^[1-9]\d*F?/)) {
				// Decimal literals may be "imaginary"
				stream.eat(/J/i);
				// TODO - Can you have imaginary longs?
				intLiteral = true;
			}
			// Zero by itself with no other piece of number.
			else if (stream.match(/^0(?![\dx])/i)) { intLiteral = true; }
			if (intLiteral) {
				// Integer literals may be "long"
				stream.eat(/L/i);
				return 'number';
			}
		}

		// Handle Strings
		if (stream.match(stringPrefixes)) {
			state.tokenize = tokenStringFactory(stream.current());
			return state.tokenize(stream, state);
		}

		// Handle operators and Delimiters
		if (stream.match(doubleOperators)
			|| stream.match(singleOperators)
			|| stream.match(wordOperators)) {
			return 'operator';
		}
		if (stream.match(singleDelimiters)) {
			return null;
		}

		if (stream.match(brakets)) {
			return "bracket";
		}

		if (stream.match(noIndentWords)) {
			state.doInCurrentLine = true;

			return 'keyword';
		}

		if (stream.match(doOpening)) {
			indent(stream,state);
			state.doInCurrentLine = true;

			return 'keyword';
		}
		if (stream.match(opening)) {
			if (! state.doInCurrentLine)
			  indent(stream,state);
			else
			  state.doInCurrentLine = false;

			return 'keyword';
		}
		if (stream.match(middle)) {
			return 'keyword';
		}


		if (stream.match(doubleClosing)) {
			dedent(stream,state);
			dedent(stream,state);

			return 'keyword';
		}
		if (stream.match(closing)) {
			if (! state.doInCurrentLine)
			  dedent(stream,state);
			else
			  state.doInCurrentLine = false;

			return 'keyword';
		}

		if (stream.match(keywords)) {
			return 'keyword';
		}

		if (stream.match(atoms)) {
			return 'atom';
		}

		if (stream.match(known)) {
			return 'variable-2';
		}

		if (stream.match(builtinFuncs)) {
			return 'builtin';
		}

		if (stream.match(builtinObjs)){
			return 'variable-2';
		}

		if (stream.match(identifiers)) {
			return 'variable';
		}

		// Handle non-detected items
		stream.next();
		return ERRORCLASS;
	}

	function tokenStringFactory(delimiter) {
		var singleline = delimiter.length == 1;
		var OUTCLASS = 'string';

		return function(stream, state) {
			while (!stream.eol()) {
				stream.eatWhile(/[^'"]/);
				if (stream.match(delimiter)) {
					state.tokenize = tokenBase;
					return OUTCLASS;
				} else {
					stream.eat(/['"]/);
				}
			}
			if (singleline) {
				if (parserConf.singleLineStringErrors) {
					return ERRORCLASS;
				} else {
					state.tokenize = tokenBase;
				}
			}
			return OUTCLASS;
		};
	}


	function tokenLexer(stream, state) {
		var style = state.tokenize(stream, state);
		var current = stream.current();

		// Handle '.' connected identifiers
		if (current === '.') {
			style = state.tokenize(stream, state);

			current = stream.current();
			if (style && (style.substr(0, 8) === 'variable' || style==='builtin' || style==='keyword')){//|| knownWords.indexOf(current.substring(1)) > -1) {
				if (style === 'builtin' || style === 'keyword') style='variable';
				if (knownWords.indexOf(current.substr(1)) > -1) style='variable-2';

				return style;
			} else {
				return ERRORCLASS;
			}
		}

		return style;
	}

	var external = {
		electricChars:"dDpPtTfFeE ",
		startState: function() {
			return {
			  tokenize: tokenBase,
			  lastToken: null,
			  currentIndent: 0,
			  nextLineIndent: 0,
			  doInCurrentLine: false,
			  ignoreKeyword: false


		  };
		},

		token: function(stream, state) {
			if (stream.sol()) {
			  state.currentIndent += state.nextLineIndent;
			  state.nextLineIndent = 0;
			  state.doInCurrentLine = 0;
			}
			var style = tokenLexer(stream, state);

			state.lastToken = {style:style, content: stream.current()};

			if (style==='space') style=null;

			return style;
		},

		indent: function(state, textAfter) {
			var trueText = textAfter.replace(/^\s+|\s+$/g, '') ;
			if (trueText.match(closing) || trueText.match(doubleClosing) || trueText.match(middle)) return conf.indentUnit*(state.currentIndent-1);
			if(state.currentIndent < 0) return 0;
			return state.currentIndent * conf.indentUnit;
		}

	};
	return external;
});

CodeMirror.defineMIME("text/vbscript", "vbscript");

});

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: https://codemirror.net/LICENSE

(function(mod) {
	if (typeof exports == "object" && typeof module == "object") // CommonJS
		mod(require("../../lib/codemirror"), require("../xml/xml"), require("../javascript/javascript"), require("../css/css"));
	else if (typeof define == "function" && define.amd) // AMD
		define(["../../lib/codemirror", "../xml/xml", "../javascript/javascript", "../css/css"], mod);
	else // Plain browser env
		mod(CodeMirror);
})(function(CodeMirror) {
	"use strict";

	var defaultTags = {
		script: [
			["lang", /(javascript|babel)/i, "javascript"],
			["type", /^(?:text|application)\/(?:x-)?(?:java|ecma)script$|^module$|^$/i, "javascript"],
			["type", /./, "text/plain"],
			[null, null, "javascript"]
		],
		style:  [
			["lang", /^css$/i, "css"],
			["type", /^(text\/)?(x-)?(stylesheet|css)$/i, "css"],
			["type", /./, "text/plain"],
			[null, null, "css"]
		]
	};

	function maybeBackup(stream, pat, style) {
		var cur = stream.current(), close = cur.search(pat);
		if (close > -1) {
			stream.backUp(cur.length - close);
		} else if (cur.match(/<\/?$/)) {
			stream.backUp(cur.length);
			if (!stream.match(pat, false)) stream.match(cur);
		}
		return style;
	}

	var attrRegexpCache = {};
	function getAttrRegexp(attr) {
		var regexp = attrRegexpCache[attr];
		if (regexp) return regexp;
		return attrRegexpCache[attr] = new RegExp("\\s+" + attr + "\\s*=\\s*('|\")?([^'\"]+)('|\")?\\s*");
	}

	function getAttrValue(text, attr) {
		var match = text.match(getAttrRegexp(attr))
		return match ? /^\s*(.*?)\s*$/.exec(match[2])[1] : ""
	}

	function getTagRegexp(tagName, anchored) {
		return new RegExp((anchored ? "^" : "") + "<\/\s*" + tagName + "\s*>", "i");
	}

	function addTags(from, to) {
		for (var tag in from) {
			var dest = to[tag] || (to[tag] = []);
			var source = from[tag];
			for (var i = source.length - 1; i >= 0; i--)
				dest.unshift(source[i])
		}
	}

	function findMatchingMode(tagInfo, tagText) {
		for (var i = 0; i < tagInfo.length; i++) {
			var spec = tagInfo[i];
			if (!spec[0] || spec[1].test(getAttrValue(tagText, spec[0]))) return spec[2];
		}
	}

	CodeMirror.defineMode("htmlmixed", function (config, parserConfig) {
		var htmlMode = CodeMirror.getMode(config, {
			name: "xml",
			htmlMode: true,
			multilineTagIndentFactor: parserConfig.multilineTagIndentFactor,
			multilineTagIndentPastTag: parserConfig.multilineTagIndentPastTag
		});

		var tags = {};
		var configTags = parserConfig && parserConfig.tags, configScript = parserConfig && parserConfig.scriptTypes;
		addTags(defaultTags, tags);
		if (configTags) addTags(configTags, tags);
		if (configScript) for (var i = configScript.length - 1; i >= 0; i--)
			tags.script.unshift(["type", configScript[i].matches, configScript[i].mode])

		function html(stream, state) {
			var style = htmlMode.token(stream, state.htmlState), tag = /\btag\b/.test(style), tagName
			if (tag && !/[<>\s\/]/.test(stream.current()) &&
					(tagName = state.htmlState.tagName && state.htmlState.tagName.toLowerCase()) &&
					tags.hasOwnProperty(tagName)) {
				state.inTag = tagName + " "
			} else if (state.inTag && tag && />$/.test(stream.current())) {
				var inTag = /^([\S]+) (.*)/.exec(state.inTag)
				state.inTag = null
				var modeSpec = stream.current() == ">" && findMatchingMode(tags[inTag[1]], inTag[2])
				var mode = CodeMirror.getMode(config, modeSpec)
				var endTagA = getTagRegexp(inTag[1], true), endTag = getTagRegexp(inTag[1], false);
				state.token = function (stream, state) {
					if (stream.match(endTagA, false)) {
						state.token = html;
						state.localState = state.localMode = null;
						return null;
					}
					return maybeBackup(stream, endTag, state.localMode.token(stream, state.localState));
				};
				state.localMode = mode;
				state.localState = CodeMirror.startState(mode, htmlMode.indent(state.htmlState, "", ""));
			} else if (state.inTag) {
				state.inTag += stream.current()
				if (stream.eol()) state.inTag += " "
			}
			return style;
		};

		return {
			startState: function () {
				var state = CodeMirror.startState(htmlMode);
				return {token: html, inTag: null, localMode: null, localState: null, htmlState: state};
			},

			copyState: function (state) {
				var local;
				if (state.localState) {
					local = CodeMirror.copyState(state.localMode, state.localState);
				}
				return {token: state.token, inTag: state.inTag,
								localMode: state.localMode, localState: local,
								htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};
			},

			token: function (stream, state) {
				return state.token(stream, state);
			},

			indent: function (state, textAfter, line) {
				if (!state.localMode || /^\s*<\//.test(textAfter))
					return htmlMode.indent(state.htmlState, textAfter, line);
				else if (state.localMode.indent)
					return state.localMode.indent(state.localState, textAfter, line);
				else
					return CodeMirror.Pass;
			},

			innerMode: function (state) {
				return {state: state.localState || state.htmlState, mode: state.localMode || htmlMode};
			}
		};
	}, "xml", "javascript", "css");

	CodeMirror.defineMIME("text/html", "htmlmixed");
});