scripts/codemirror.js (view raw)
1// CodeMirror, copyright (c) by Marijn Haverbeke and others
2// Distributed under an MIT license: https://codemirror.net/LICENSE
3
4// This is CodeMirror (https://codemirror.net), a code editor
5// implemented in JavaScript on top of the browser's DOM.
6//
7// You can find some technical background for some of the code below
8// at http://marijnhaverbeke.nl/blog/#cm-internals .
9
10(function (global, factory) {
11 typeof exports === 'object' && typeof module !== 'undefined' ? module.exports = factory() :
12 typeof define === 'function' && define.amd ? define(factory) :
13 (global = global || self, global.CodeMirror = factory());
14}(this, (function () { 'use strict';
15
16 // Kludges for bugs and behavior differences that can't be feature
17 // detected are enabled based on userAgent etc sniffing.
18 var userAgent = navigator.userAgent;
19 var platform = navigator.platform;
20
21 var gecko = /gecko\/\d/i.test(userAgent);
22 var ie_upto10 = /MSIE \d/.test(userAgent);
23 var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent);
24 var edge = /Edge\/(\d+)/.exec(userAgent);
25 var ie = ie_upto10 || ie_11up || edge;
26 var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : +(edge || ie_11up)[1]);
27 var webkit = !edge && /WebKit\//.test(userAgent);
28 var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent);
29 var chrome = !edge && /Chrome\//.test(userAgent);
30 var presto = /Opera\//.test(userAgent);
31 var safari = /Apple Computer/.test(navigator.vendor);
32 var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent);
33 var phantom = /PhantomJS/.test(userAgent);
34
35 var ios = !edge && /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent);
36 var android = /Android/.test(userAgent);
37 // This is woefully incomplete. Suggestions for alternative methods welcome.
38 var mobile = ios || android || /webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent);
39 var mac = ios || /Mac/.test(platform);
40 var chromeOS = /\bCrOS\b/.test(userAgent);
41 var windows = /win/i.test(platform);
42
43 var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/);
44 if (presto_version) { presto_version = Number(presto_version[1]); }
45 if (presto_version && presto_version >= 15) { presto = false; webkit = true; }
46 // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
47 var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11));
48 var captureRightClick = gecko || (ie && ie_version >= 9);
49
50 function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*") }
51
52 var rmClass = function(node, cls) {
53 var current = node.className;
54 var match = classTest(cls).exec(current);
55 if (match) {
56 var after = current.slice(match.index + match[0].length);
57 node.className = current.slice(0, match.index) + (after ? match[1] + after : "");
58 }
59 };
60
61 function removeChildren(e) {
62 for (var count = e.childNodes.length; count > 0; --count)
63 { e.removeChild(e.firstChild); }
64 return e
65 }
66
67 function removeChildrenAndAdd(parent, e) {
68 return removeChildren(parent).appendChild(e)
69 }
70
71 function elt(tag, content, className, style) {
72 var e = document.createElement(tag);
73 if (className) { e.className = className; }
74 if (style) { e.style.cssText = style; }
75 if (typeof content == "string") { e.appendChild(document.createTextNode(content)); }
76 else if (content) { for (var i = 0; i < content.length; ++i) { e.appendChild(content[i]); } }
77 return e
78 }
79 // wrapper for elt, which removes the elt from the accessibility tree
80 function eltP(tag, content, className, style) {
81 var e = elt(tag, content, className, style);
82 e.setAttribute("role", "presentation");
83 return e
84 }
85
86 var range;
87 if (document.createRange) { range = function(node, start, end, endNode) {
88 var r = document.createRange();
89 r.setEnd(endNode || node, end);
90 r.setStart(node, start);
91 return r
92 }; }
93 else { range = function(node, start, end) {
94 var r = document.body.createTextRange();
95 try { r.moveToElementText(node.parentNode); }
96 catch(e) { return r }
97 r.collapse(true);
98 r.moveEnd("character", end);
99 r.moveStart("character", start);
100 return r
101 }; }
102
103 function contains(parent, child) {
104 if (child.nodeType == 3) // Android browser always returns false when child is a textnode
105 { child = child.parentNode; }
106 if (parent.contains)
107 { return parent.contains(child) }
108 do {
109 if (child.nodeType == 11) { child = child.host; }
110 if (child == parent) { return true }
111 } while (child = child.parentNode)
112 }
113
114 function activeElt() {
115 // IE and Edge may throw an "Unspecified Error" when accessing document.activeElement.
116 // IE < 10 will throw when accessed while the page is loading or in an iframe.
117 // IE > 9 and Edge will throw when accessed in an iframe if document.body is unavailable.
118 var activeElement;
119 try {
120 activeElement = document.activeElement;
121 } catch(e) {
122 activeElement = document.body || null;
123 }
124 while (activeElement && activeElement.shadowRoot && activeElement.shadowRoot.activeElement)
125 { activeElement = activeElement.shadowRoot.activeElement; }
126 return activeElement
127 }
128
129 function addClass(node, cls) {
130 var current = node.className;
131 if (!classTest(cls).test(current)) { node.className += (current ? " " : "") + cls; }
132 }
133 function joinClasses(a, b) {
134 var as = a.split(" ");
135 for (var i = 0; i < as.length; i++)
136 { if (as[i] && !classTest(as[i]).test(b)) { b += " " + as[i]; } }
137 return b
138 }
139
140 var selectInput = function(node) { node.select(); };
141 if (ios) // Mobile Safari apparently has a bug where select() is broken.
142 { selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; }
143 else if (ie) // Suppress mysterious IE10 errors
144 { selectInput = function(node) { try { node.select(); } catch(_e) {} }; }
145
146 function bind(f) {
147 var args = Array.prototype.slice.call(arguments, 1);
148 return function(){return f.apply(null, args)}
149 }
150
151 function copyObj(obj, target, overwrite) {
152 if (!target) { target = {}; }
153 for (var prop in obj)
154 { if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop)))
155 { target[prop] = obj[prop]; } }
156 return target
157 }
158
159 // Counts the column offset in a string, taking tabs into account.
160 // Used mostly to find indentation.
161 function countColumn(string, end, tabSize, startIndex, startValue) {
162 if (end == null) {
163 end = string.search(/[^\s\u00a0]/);
164 if (end == -1) { end = string.length; }
165 }
166 for (var i = startIndex || 0, n = startValue || 0;;) {
167 var nextTab = string.indexOf("\t", i);
168 if (nextTab < 0 || nextTab >= end)
169 { return n + (end - i) }
170 n += nextTab - i;
171 n += tabSize - (n % tabSize);
172 i = nextTab + 1;
173 }
174 }
175
176 var Delayed = function() {
177 this.id = null;
178 this.f = null;
179 this.time = 0;
180 this.handler = bind(this.onTimeout, this);
181 };
182 Delayed.prototype.onTimeout = function (self) {
183 self.id = 0;
184 if (self.time <= +new Date) {
185 self.f();
186 } else {
187 setTimeout(self.handler, self.time - +new Date);
188 }
189 };
190 Delayed.prototype.set = function (ms, f) {
191 this.f = f;
192 var time = +new Date + ms;
193 if (!this.id || time < this.time) {
194 clearTimeout(this.id);
195 this.id = setTimeout(this.handler, ms);
196 this.time = time;
197 }
198 };
199
200 function indexOf(array, elt) {
201 for (var i = 0; i < array.length; ++i)
202 { if (array[i] == elt) { return i } }
203 return -1
204 }
205
206 // Number of pixels added to scroller and sizer to hide scrollbar
207 var scrollerGap = 50;
208
209 // Returned or thrown by various protocols to signal 'I'm not
210 // handling this'.
211 var Pass = {toString: function(){return "CodeMirror.Pass"}};
212
213 // Reused option objects for setSelection & friends
214 var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"};
215
216 // The inverse of countColumn -- find the offset that corresponds to
217 // a particular column.
218 function findColumn(string, goal, tabSize) {
219 for (var pos = 0, col = 0;;) {
220 var nextTab = string.indexOf("\t", pos);
221 if (nextTab == -1) { nextTab = string.length; }
222 var skipped = nextTab - pos;
223 if (nextTab == string.length || col + skipped >= goal)
224 { return pos + Math.min(skipped, goal - col) }
225 col += nextTab - pos;
226 col += tabSize - (col % tabSize);
227 pos = nextTab + 1;
228 if (col >= goal) { return pos }
229 }
230 }
231
232 var spaceStrs = [""];
233 function spaceStr(n) {
234 while (spaceStrs.length <= n)
235 { spaceStrs.push(lst(spaceStrs) + " "); }
236 return spaceStrs[n]
237 }
238
239 function lst(arr) { return arr[arr.length-1] }
240
241 function map(array, f) {
242 var out = [];
243 for (var i = 0; i < array.length; i++) { out[i] = f(array[i], i); }
244 return out
245 }
246
247 function insertSorted(array, value, score) {
248 var pos = 0, priority = score(value);
249 while (pos < array.length && score(array[pos]) <= priority) { pos++; }
250 array.splice(pos, 0, value);
251 }
252
253 function nothing() {}
254
255 function createObj(base, props) {
256 var inst;
257 if (Object.create) {
258 inst = Object.create(base);
259 } else {
260 nothing.prototype = base;
261 inst = new nothing();
262 }
263 if (props) { copyObj(props, inst); }
264 return inst
265 }
266
267 var nonASCIISingleCaseWordChar = /[\u00df\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
268 function isWordCharBasic(ch) {
269 return /\w/.test(ch) || ch > "\x80" &&
270 (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch))
271 }
272 function isWordChar(ch, helper) {
273 if (!helper) { return isWordCharBasic(ch) }
274 if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) { return true }
275 return helper.test(ch)
276 }
277
278 function isEmpty(obj) {
279 for (var n in obj) { if (obj.hasOwnProperty(n) && obj[n]) { return false } }
280 return true
281 }
282
283 // Extending unicode characters. A series of a non-extending char +
284 // any number of extending chars is treated as a single unit as far
285 // as editing and measuring is concerned. This is not fully correct,
286 // since some scripts/fonts/browsers also treat other configurations
287 // of code points as a group.
288 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]/;
289 function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch) }
290
291 // Returns a number from the range [`0`; `str.length`] unless `pos` is outside that range.
292 function skipExtendingChars(str, pos, dir) {
293 while ((dir < 0 ? pos > 0 : pos < str.length) && isExtendingChar(str.charAt(pos))) { pos += dir; }
294 return pos
295 }
296
297 // Returns the value from the range [`from`; `to`] that satisfies
298 // `pred` and is closest to `from`. Assumes that at least `to`
299 // satisfies `pred`. Supports `from` being greater than `to`.
300 function findFirst(pred, from, to) {
301 // At any point we are certain `to` satisfies `pred`, don't know
302 // whether `from` does.
303 var dir = from > to ? -1 : 1;
304 for (;;) {
305 if (from == to) { return from }
306 var midF = (from + to) / 2, mid = dir < 0 ? Math.ceil(midF) : Math.floor(midF);
307 if (mid == from) { return pred(mid) ? from : to }
308 if (pred(mid)) { to = mid; }
309 else { from = mid + dir; }
310 }
311 }
312
313 // BIDI HELPERS
314
315 function iterateBidiSections(order, from, to, f) {
316 if (!order) { return f(from, to, "ltr", 0) }
317 var found = false;
318 for (var i = 0; i < order.length; ++i) {
319 var part = order[i];
320 if (part.from < to && part.to > from || from == to && part.to == from) {
321 f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr", i);
322 found = true;
323 }
324 }
325 if (!found) { f(from, to, "ltr"); }
326 }
327
328 var bidiOther = null;
329 function getBidiPartAt(order, ch, sticky) {
330 var found;
331 bidiOther = null;
332 for (var i = 0; i < order.length; ++i) {
333 var cur = order[i];
334 if (cur.from < ch && cur.to > ch) { return i }
335 if (cur.to == ch) {
336 if (cur.from != cur.to && sticky == "before") { found = i; }
337 else { bidiOther = i; }
338 }
339 if (cur.from == ch) {
340 if (cur.from != cur.to && sticky != "before") { found = i; }
341 else { bidiOther = i; }
342 }
343 }
344 return found != null ? found : bidiOther
345 }
346
347 // Bidirectional ordering algorithm
348 // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
349 // that this (partially) implements.
350
351 // One-char codes used for character types:
352 // L (L): Left-to-Right
353 // R (R): Right-to-Left
354 // r (AL): Right-to-Left Arabic
355 // 1 (EN): European Number
356 // + (ES): European Number Separator
357 // % (ET): European Number Terminator
358 // n (AN): Arabic Number
359 // , (CS): Common Number Separator
360 // m (NSM): Non-Spacing Mark
361 // b (BN): Boundary Neutral
362 // s (B): Paragraph Separator
363 // t (S): Segment Separator
364 // w (WS): Whitespace
365 // N (ON): Other Neutrals
366
367 // Returns null if characters are ordered as they appear
368 // (left-to-right), or an array of sections ({from, to, level}
369 // objects) in the order in which they occur visually.
370 var bidiOrdering = (function() {
371 // Character types for codepoints 0 to 0xff
372 var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN";
373 // Character types for codepoints 0x600 to 0x6f9
374 var arabicTypes = "nnnnnnNNr%%r,rNNmmmmmmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmmmnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmnNmmmmmmrrmmNmmmmrr1111111111";
375 function charType(code) {
376 if (code <= 0xf7) { return lowTypes.charAt(code) }
377 else if (0x590 <= code && code <= 0x5f4) { return "R" }
378 else if (0x600 <= code && code <= 0x6f9) { return arabicTypes.charAt(code - 0x600) }
379 else if (0x6ee <= code && code <= 0x8ac) { return "r" }
380 else if (0x2000 <= code && code <= 0x200b) { return "w" }
381 else if (code == 0x200c) { return "b" }
382 else { return "L" }
383 }
384
385 var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
386 var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
387
388 function BidiSpan(level, from, to) {
389 this.level = level;
390 this.from = from; this.to = to;
391 }
392
393 return function(str, direction) {
394 var outerType = direction == "ltr" ? "L" : "R";
395
396 if (str.length == 0 || direction == "ltr" && !bidiRE.test(str)) { return false }
397 var len = str.length, types = [];
398 for (var i = 0; i < len; ++i)
399 { types.push(charType(str.charCodeAt(i))); }
400
401 // W1. Examine each non-spacing mark (NSM) in the level run, and
402 // change the type of the NSM to the type of the previous
403 // character. If the NSM is at the start of the level run, it will
404 // get the type of sor.
405 for (var i$1 = 0, prev = outerType; i$1 < len; ++i$1) {
406 var type = types[i$1];
407 if (type == "m") { types[i$1] = prev; }
408 else { prev = type; }
409 }
410
411 // W2. Search backwards from each instance of a European number
412 // until the first strong type (R, L, AL, or sor) is found. If an
413 // AL is found, change the type of the European number to Arabic
414 // number.
415 // W3. Change all ALs to R.
416 for (var i$2 = 0, cur = outerType; i$2 < len; ++i$2) {
417 var type$1 = types[i$2];
418 if (type$1 == "1" && cur == "r") { types[i$2] = "n"; }
419 else if (isStrong.test(type$1)) { cur = type$1; if (type$1 == "r") { types[i$2] = "R"; } }
420 }
421
422 // W4. A single European separator between two European numbers
423 // changes to a European number. A single common separator between
424 // two numbers of the same type changes to that type.
425 for (var i$3 = 1, prev$1 = types[0]; i$3 < len - 1; ++i$3) {
426 var type$2 = types[i$3];
427 if (type$2 == "+" && prev$1 == "1" && types[i$3+1] == "1") { types[i$3] = "1"; }
428 else if (type$2 == "," && prev$1 == types[i$3+1] &&
429 (prev$1 == "1" || prev$1 == "n")) { types[i$3] = prev$1; }
430 prev$1 = type$2;
431 }
432
433 // W5. A sequence of European terminators adjacent to European
434 // numbers changes to all European numbers.
435 // W6. Otherwise, separators and terminators change to Other
436 // Neutral.
437 for (var i$4 = 0; i$4 < len; ++i$4) {
438 var type$3 = types[i$4];
439 if (type$3 == ",") { types[i$4] = "N"; }
440 else if (type$3 == "%") {
441 var end = (void 0);
442 for (end = i$4 + 1; end < len && types[end] == "%"; ++end) {}
443 var replace = (i$4 && types[i$4-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
444 for (var j = i$4; j < end; ++j) { types[j] = replace; }
445 i$4 = end - 1;
446 }
447 }
448
449 // W7. Search backwards from each instance of a European number
450 // until the first strong type (R, L, or sor) is found. If an L is
451 // found, then change the type of the European number to L.
452 for (var i$5 = 0, cur$1 = outerType; i$5 < len; ++i$5) {
453 var type$4 = types[i$5];
454 if (cur$1 == "L" && type$4 == "1") { types[i$5] = "L"; }
455 else if (isStrong.test(type$4)) { cur$1 = type$4; }
456 }
457
458 // N1. A sequence of neutrals takes the direction of the
459 // surrounding strong text if the text on both sides has the same
460 // direction. European and Arabic numbers act as if they were R in
461 // terms of their influence on neutrals. Start-of-level-run (sor)
462 // and end-of-level-run (eor) are used at level run boundaries.
463 // N2. Any remaining neutrals take the embedding direction.
464 for (var i$6 = 0; i$6 < len; ++i$6) {
465 if (isNeutral.test(types[i$6])) {
466 var end$1 = (void 0);
467 for (end$1 = i$6 + 1; end$1 < len && isNeutral.test(types[end$1]); ++end$1) {}
468 var before = (i$6 ? types[i$6-1] : outerType) == "L";
469 var after = (end$1 < len ? types[end$1] : outerType) == "L";
470 var replace$1 = before == after ? (before ? "L" : "R") : outerType;
471 for (var j$1 = i$6; j$1 < end$1; ++j$1) { types[j$1] = replace$1; }
472 i$6 = end$1 - 1;
473 }
474 }
475
476 // Here we depart from the documented algorithm, in order to avoid
477 // building up an actual levels array. Since there are only three
478 // levels (0, 1, 2) in an implementation that doesn't take
479 // explicit embedding into account, we can build up the order on
480 // the fly, without following the level-based algorithm.
481 var order = [], m;
482 for (var i$7 = 0; i$7 < len;) {
483 if (countsAsLeft.test(types[i$7])) {
484 var start = i$7;
485 for (++i$7; i$7 < len && countsAsLeft.test(types[i$7]); ++i$7) {}
486 order.push(new BidiSpan(0, start, i$7));
487 } else {
488 var pos = i$7, at = order.length, isRTL = direction == "rtl" ? 1 : 0;
489 for (++i$7; i$7 < len && types[i$7] != "L"; ++i$7) {}
490 for (var j$2 = pos; j$2 < i$7;) {
491 if (countsAsNum.test(types[j$2])) {
492 if (pos < j$2) { order.splice(at, 0, new BidiSpan(1, pos, j$2)); at += isRTL; }
493 var nstart = j$2;
494 for (++j$2; j$2 < i$7 && countsAsNum.test(types[j$2]); ++j$2) {}
495 order.splice(at, 0, new BidiSpan(2, nstart, j$2));
496 at += isRTL;
497 pos = j$2;
498 } else { ++j$2; }
499 }
500 if (pos < i$7) { order.splice(at, 0, new BidiSpan(1, pos, i$7)); }
501 }
502 }
503 if (direction == "ltr") {
504 if (order[0].level == 1 && (m = str.match(/^\s+/))) {
505 order[0].from = m[0].length;
506 order.unshift(new BidiSpan(0, 0, m[0].length));
507 }
508 if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
509 lst(order).to -= m[0].length;
510 order.push(new BidiSpan(0, len - m[0].length, len));
511 }
512 }
513
514 return direction == "rtl" ? order.reverse() : order
515 }
516 })();
517
518 // Get the bidi ordering for the given line (and cache it). Returns
519 // false for lines that are fully left-to-right, and an array of
520 // BidiSpan objects otherwise.
521 function getOrder(line, direction) {
522 var order = line.order;
523 if (order == null) { order = line.order = bidiOrdering(line.text, direction); }
524 return order
525 }
526
527 // EVENT HANDLING
528
529 // Lightweight event framework. on/off also work on DOM nodes,
530 // registering native DOM handlers.
531
532 var noHandlers = [];
533
534 var on = function(emitter, type, f) {
535 if (emitter.addEventListener) {
536 emitter.addEventListener(type, f, false);
537 } else if (emitter.attachEvent) {
538 emitter.attachEvent("on" + type, f);
539 } else {
540 var map = emitter._handlers || (emitter._handlers = {});
541 map[type] = (map[type] || noHandlers).concat(f);
542 }
543 };
544
545 function getHandlers(emitter, type) {
546 return emitter._handlers && emitter._handlers[type] || noHandlers
547 }
548
549 function off(emitter, type, f) {
550 if (emitter.removeEventListener) {
551 emitter.removeEventListener(type, f, false);
552 } else if (emitter.detachEvent) {
553 emitter.detachEvent("on" + type, f);
554 } else {
555 var map = emitter._handlers, arr = map && map[type];
556 if (arr) {
557 var index = indexOf(arr, f);
558 if (index > -1)
559 { map[type] = arr.slice(0, index).concat(arr.slice(index + 1)); }
560 }
561 }
562 }
563
564 function signal(emitter, type /*, values...*/) {
565 var handlers = getHandlers(emitter, type);
566 if (!handlers.length) { return }
567 var args = Array.prototype.slice.call(arguments, 2);
568 for (var i = 0; i < handlers.length; ++i) { handlers[i].apply(null, args); }
569 }
570
571 // The DOM events that CodeMirror handles can be overridden by
572 // registering a (non-DOM) handler on the editor for the event name,
573 // and preventDefault-ing the event in that handler.
574 function signalDOMEvent(cm, e, override) {
575 if (typeof e == "string")
576 { e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; }
577 signal(cm, override || e.type, cm, e);
578 return e_defaultPrevented(e) || e.codemirrorIgnore
579 }
580
581 function signalCursorActivity(cm) {
582 var arr = cm._handlers && cm._handlers.cursorActivity;
583 if (!arr) { return }
584 var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []);
585 for (var i = 0; i < arr.length; ++i) { if (indexOf(set, arr[i]) == -1)
586 { set.push(arr[i]); } }
587 }
588
589 function hasHandler(emitter, type) {
590 return getHandlers(emitter, type).length > 0
591 }
592
593 // Add on and off methods to a constructor's prototype, to make
594 // registering events on such objects more convenient.
595 function eventMixin(ctor) {
596 ctor.prototype.on = function(type, f) {on(this, type, f);};
597 ctor.prototype.off = function(type, f) {off(this, type, f);};
598 }
599
600 // Due to the fact that we still support jurassic IE versions, some
601 // compatibility wrappers are needed.
602
603 function e_preventDefault(e) {
604 if (e.preventDefault) { e.preventDefault(); }
605 else { e.returnValue = false; }
606 }
607 function e_stopPropagation(e) {
608 if (e.stopPropagation) { e.stopPropagation(); }
609 else { e.cancelBubble = true; }
610 }
611 function e_defaultPrevented(e) {
612 return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false
613 }
614 function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
615
616 function e_target(e) {return e.target || e.srcElement}
617 function e_button(e) {
618 var b = e.which;
619 if (b == null) {
620 if (e.button & 1) { b = 1; }
621 else if (e.button & 2) { b = 3; }
622 else if (e.button & 4) { b = 2; }
623 }
624 if (mac && e.ctrlKey && b == 1) { b = 3; }
625 return b
626 }
627
628 // Detect drag-and-drop
629 var dragAndDrop = function() {
630 // There is *some* kind of drag-and-drop support in IE6-8, but I
631 // couldn't get it to work yet.
632 if (ie && ie_version < 9) { return false }
633 var div = elt('div');
634 return "draggable" in div || "dragDrop" in div
635 }();
636
637 var zwspSupported;
638 function zeroWidthElement(measure) {
639 if (zwspSupported == null) {
640 var test = elt("span", "\u200b");
641 removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
642 if (measure.firstChild.offsetHeight != 0)
643 { zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); }
644 }
645 var node = zwspSupported ? elt("span", "\u200b") :
646 elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
647 node.setAttribute("cm-text", "");
648 return node
649 }
650
651 // Feature-detect IE's crummy client rect reporting for bidi text
652 var badBidiRects;
653 function hasBadBidiRects(measure) {
654 if (badBidiRects != null) { return badBidiRects }
655 var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"));
656 var r0 = range(txt, 0, 1).getBoundingClientRect();
657 var r1 = range(txt, 1, 2).getBoundingClientRect();
658 removeChildren(measure);
659 if (!r0 || r0.left == r0.right) { return false } // Safari returns null in some cases (#2780)
660 return badBidiRects = (r1.right - r0.right < 3)
661 }
662
663 // See if "".split is the broken IE version, if so, provide an
664 // alternative way to split lines.
665 var splitLinesAuto = "\n\nb".split(/\n/).length != 3 ? function (string) {
666 var pos = 0, result = [], l = string.length;
667 while (pos <= l) {
668 var nl = string.indexOf("\n", pos);
669 if (nl == -1) { nl = string.length; }
670 var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
671 var rt = line.indexOf("\r");
672 if (rt != -1) {
673 result.push(line.slice(0, rt));
674 pos += rt + 1;
675 } else {
676 result.push(line);
677 pos = nl + 1;
678 }
679 }
680 return result
681 } : function (string) { return string.split(/\r\n?|\n/); };
682
683 var hasSelection = window.getSelection ? function (te) {
684 try { return te.selectionStart != te.selectionEnd }
685 catch(e) { return false }
686 } : function (te) {
687 var range;
688 try {range = te.ownerDocument.selection.createRange();}
689 catch(e) {}
690 if (!range || range.parentElement() != te) { return false }
691 return range.compareEndPoints("StartToEnd", range) != 0
692 };
693
694 var hasCopyEvent = (function () {
695 var e = elt("div");
696 if ("oncopy" in e) { return true }
697 e.setAttribute("oncopy", "return;");
698 return typeof e.oncopy == "function"
699 })();
700
701 var badZoomedRects = null;
702 function hasBadZoomedRects(measure) {
703 if (badZoomedRects != null) { return badZoomedRects }
704 var node = removeChildrenAndAdd(measure, elt("span", "x"));
705 var normal = node.getBoundingClientRect();
706 var fromRange = range(node, 0, 1).getBoundingClientRect();
707 return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1
708 }
709
710 // Known modes, by name and by MIME
711 var modes = {}, mimeModes = {};
712
713 // Extra arguments are stored as the mode's dependencies, which is
714 // used by (legacy) mechanisms like loadmode.js to automatically
715 // load a mode. (Preferred mechanism is the require/define calls.)
716 function defineMode(name, mode) {
717 if (arguments.length > 2)
718 { mode.dependencies = Array.prototype.slice.call(arguments, 2); }
719 modes[name] = mode;
720 }
721
722 function defineMIME(mime, spec) {
723 mimeModes[mime] = spec;
724 }
725
726 // Given a MIME type, a {name, ...options} config object, or a name
727 // string, return a mode config object.
728 function resolveMode(spec) {
729 if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
730 spec = mimeModes[spec];
731 } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
732 var found = mimeModes[spec.name];
733 if (typeof found == "string") { found = {name: found}; }
734 spec = createObj(found, spec);
735 spec.name = found.name;
736 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
737 return resolveMode("application/xml")
738 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) {
739 return resolveMode("application/json")
740 }
741 if (typeof spec == "string") { return {name: spec} }
742 else { return spec || {name: "null"} }
743 }
744
745 // Given a mode spec (anything that resolveMode accepts), find and
746 // initialize an actual mode object.
747 function getMode(options, spec) {
748 spec = resolveMode(spec);
749 var mfactory = modes[spec.name];
750 if (!mfactory) { return getMode(options, "text/plain") }
751 var modeObj = mfactory(options, spec);
752 if (modeExtensions.hasOwnProperty(spec.name)) {
753 var exts = modeExtensions[spec.name];
754 for (var prop in exts) {
755 if (!exts.hasOwnProperty(prop)) { continue }
756 if (modeObj.hasOwnProperty(prop)) { modeObj["_" + prop] = modeObj[prop]; }
757 modeObj[prop] = exts[prop];
758 }
759 }
760 modeObj.name = spec.name;
761 if (spec.helperType) { modeObj.helperType = spec.helperType; }
762 if (spec.modeProps) { for (var prop$1 in spec.modeProps)
763 { modeObj[prop$1] = spec.modeProps[prop$1]; } }
764
765 return modeObj
766 }
767
768 // This can be used to attach properties to mode objects from
769 // outside the actual mode definition.
770 var modeExtensions = {};
771 function extendMode(mode, properties) {
772 var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
773 copyObj(properties, exts);
774 }
775
776 function copyState(mode, state) {
777 if (state === true) { return state }
778 if (mode.copyState) { return mode.copyState(state) }
779 var nstate = {};
780 for (var n in state) {
781 var val = state[n];
782 if (val instanceof Array) { val = val.concat([]); }
783 nstate[n] = val;
784 }
785 return nstate
786 }
787
788 // Given a mode and a state (for that mode), find the inner mode and
789 // state at the position that the state refers to.
790 function innerMode(mode, state) {
791 var info;
792 while (mode.innerMode) {
793 info = mode.innerMode(state);
794 if (!info || info.mode == mode) { break }
795 state = info.state;
796 mode = info.mode;
797 }
798 return info || {mode: mode, state: state}
799 }
800
801 function startState(mode, a1, a2) {
802 return mode.startState ? mode.startState(a1, a2) : true
803 }
804
805 // STRING STREAM
806
807 // Fed to the mode parsers, provides helper functions to make
808 // parsers more succinct.
809
810 var StringStream = function(string, tabSize, lineOracle) {
811 this.pos = this.start = 0;
812 this.string = string;
813 this.tabSize = tabSize || 8;
814 this.lastColumnPos = this.lastColumnValue = 0;
815 this.lineStart = 0;
816 this.lineOracle = lineOracle;
817 };
818
819 StringStream.prototype.eol = function () {return this.pos >= this.string.length};
820 StringStream.prototype.sol = function () {return this.pos == this.lineStart};
821 StringStream.prototype.peek = function () {return this.string.charAt(this.pos) || undefined};
822 StringStream.prototype.next = function () {
823 if (this.pos < this.string.length)
824 { return this.string.charAt(this.pos++) }
825 };
826 StringStream.prototype.eat = function (match) {
827 var ch = this.string.charAt(this.pos);
828 var ok;
829 if (typeof match == "string") { ok = ch == match; }
830 else { ok = ch && (match.test ? match.test(ch) : match(ch)); }
831 if (ok) {++this.pos; return ch}
832 };
833 StringStream.prototype.eatWhile = function (match) {
834 var start = this.pos;
835 while (this.eat(match)){}
836 return this.pos > start
837 };
838 StringStream.prototype.eatSpace = function () {
839 var start = this.pos;
840 while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) { ++this.pos; }
841 return this.pos > start
842 };
843 StringStream.prototype.skipToEnd = function () {this.pos = this.string.length;};
844 StringStream.prototype.skipTo = function (ch) {
845 var found = this.string.indexOf(ch, this.pos);
846 if (found > -1) {this.pos = found; return true}
847 };
848 StringStream.prototype.backUp = function (n) {this.pos -= n;};
849 StringStream.prototype.column = function () {
850 if (this.lastColumnPos < this.start) {
851 this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
852 this.lastColumnPos = this.start;
853 }
854 return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
855 };
856 StringStream.prototype.indentation = function () {
857 return countColumn(this.string, null, this.tabSize) -
858 (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0)
859 };
860 StringStream.prototype.match = function (pattern, consume, caseInsensitive) {
861 if (typeof pattern == "string") {
862 var cased = function (str) { return caseInsensitive ? str.toLowerCase() : str; };
863 var substr = this.string.substr(this.pos, pattern.length);
864 if (cased(substr) == cased(pattern)) {
865 if (consume !== false) { this.pos += pattern.length; }
866 return true
867 }
868 } else {
869 var match = this.string.slice(this.pos).match(pattern);
870 if (match && match.index > 0) { return null }
871 if (match && consume !== false) { this.pos += match[0].length; }
872 return match
873 }
874 };
875 StringStream.prototype.current = function (){return this.string.slice(this.start, this.pos)};
876 StringStream.prototype.hideFirstChars = function (n, inner) {
877 this.lineStart += n;
878 try { return inner() }
879 finally { this.lineStart -= n; }
880 };
881 StringStream.prototype.lookAhead = function (n) {
882 var oracle = this.lineOracle;
883 return oracle && oracle.lookAhead(n)
884 };
885 StringStream.prototype.baseToken = function () {
886 var oracle = this.lineOracle;
887 return oracle && oracle.baseToken(this.pos)
888 };
889
890 // Find the line object corresponding to the given line number.
891 function getLine(doc, n) {
892 n -= doc.first;
893 if (n < 0 || n >= doc.size) { throw new Error("There is no line " + (n + doc.first) + " in the document.") }
894 var chunk = doc;
895 while (!chunk.lines) {
896 for (var i = 0;; ++i) {
897 var child = chunk.children[i], sz = child.chunkSize();
898 if (n < sz) { chunk = child; break }
899 n -= sz;
900 }
901 }
902 return chunk.lines[n]
903 }
904
905 // Get the part of a document between two positions, as an array of
906 // strings.
907 function getBetween(doc, start, end) {
908 var out = [], n = start.line;
909 doc.iter(start.line, end.line + 1, function (line) {
910 var text = line.text;
911 if (n == end.line) { text = text.slice(0, end.ch); }
912 if (n == start.line) { text = text.slice(start.ch); }
913 out.push(text);
914 ++n;
915 });
916 return out
917 }
918 // Get the lines between from and to, as array of strings.
919 function getLines(doc, from, to) {
920 var out = [];
921 doc.iter(from, to, function (line) { out.push(line.text); }); // iter aborts when callback returns truthy value
922 return out
923 }
924
925 // Update the height of a line, propagating the height change
926 // upwards to parent nodes.
927 function updateLineHeight(line, height) {
928 var diff = height - line.height;
929 if (diff) { for (var n = line; n; n = n.parent) { n.height += diff; } }
930 }
931
932 // Given a line object, find its line number by walking up through
933 // its parent links.
934 function lineNo(line) {
935 if (line.parent == null) { return null }
936 var cur = line.parent, no = indexOf(cur.lines, line);
937 for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
938 for (var i = 0;; ++i) {
939 if (chunk.children[i] == cur) { break }
940 no += chunk.children[i].chunkSize();
941 }
942 }
943 return no + cur.first
944 }
945
946 // Find the line at the given vertical position, using the height
947 // information in the document tree.
948 function lineAtHeight(chunk, h) {
949 var n = chunk.first;
950 outer: do {
951 for (var i$1 = 0; i$1 < chunk.children.length; ++i$1) {
952 var child = chunk.children[i$1], ch = child.height;
953 if (h < ch) { chunk = child; continue outer }
954 h -= ch;
955 n += child.chunkSize();
956 }
957 return n
958 } while (!chunk.lines)
959 var i = 0;
960 for (; i < chunk.lines.length; ++i) {
961 var line = chunk.lines[i], lh = line.height;
962 if (h < lh) { break }
963 h -= lh;
964 }
965 return n + i
966 }
967
968 function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size}
969
970 function lineNumberFor(options, i) {
971 return String(options.lineNumberFormatter(i + options.firstLineNumber))
972 }
973
974 // A Pos instance represents a position within the text.
975 function Pos(line, ch, sticky) {
976 if ( sticky === void 0 ) sticky = null;
977
978 if (!(this instanceof Pos)) { return new Pos(line, ch, sticky) }
979 this.line = line;
980 this.ch = ch;
981 this.sticky = sticky;
982 }
983
984 // Compare two positions, return 0 if they are the same, a negative
985 // number when a is less, and a positive number otherwise.
986 function cmp(a, b) { return a.line - b.line || a.ch - b.ch }
987
988 function equalCursorPos(a, b) { return a.sticky == b.sticky && cmp(a, b) == 0 }
989
990 function copyPos(x) {return Pos(x.line, x.ch)}
991 function maxPos(a, b) { return cmp(a, b) < 0 ? b : a }
992 function minPos(a, b) { return cmp(a, b) < 0 ? a : b }
993
994 // Most of the external API clips given positions to make sure they
995 // actually exist within the document.
996 function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1))}
997 function clipPos(doc, pos) {
998 if (pos.line < doc.first) { return Pos(doc.first, 0) }
999 var last = doc.first + doc.size - 1;
1000 if (pos.line > last) { return Pos(last, getLine(doc, last).text.length) }
1001 return clipToLen(pos, getLine(doc, pos.line).text.length)
1002 }
1003 function clipToLen(pos, linelen) {
1004 var ch = pos.ch;
1005 if (ch == null || ch > linelen) { return Pos(pos.line, linelen) }
1006 else if (ch < 0) { return Pos(pos.line, 0) }
1007 else { return pos }
1008 }
1009 function clipPosArray(doc, array) {
1010 var out = [];
1011 for (var i = 0; i < array.length; i++) { out[i] = clipPos(doc, array[i]); }
1012 return out
1013 }
1014
1015 var SavedContext = function(state, lookAhead) {
1016 this.state = state;
1017 this.lookAhead = lookAhead;
1018 };
1019
1020 var Context = function(doc, state, line, lookAhead) {
1021 this.state = state;
1022 this.doc = doc;
1023 this.line = line;
1024 this.maxLookAhead = lookAhead || 0;
1025 this.baseTokens = null;
1026 this.baseTokenPos = 1;
1027 };
1028
1029 Context.prototype.lookAhead = function (n) {
1030 var line = this.doc.getLine(this.line + n);
1031 if (line != null && n > this.maxLookAhead) { this.maxLookAhead = n; }
1032 return line
1033 };
1034
1035 Context.prototype.baseToken = function (n) {
1036 if (!this.baseTokens) { return null }
1037 while (this.baseTokens[this.baseTokenPos] <= n)
1038 { this.baseTokenPos += 2; }
1039 var type = this.baseTokens[this.baseTokenPos + 1];
1040 return {type: type && type.replace(/( |^)overlay .*/, ""),
1041 size: this.baseTokens[this.baseTokenPos] - n}
1042 };
1043
1044 Context.prototype.nextLine = function () {
1045 this.line++;
1046 if (this.maxLookAhead > 0) { this.maxLookAhead--; }
1047 };
1048
1049 Context.fromSaved = function (doc, saved, line) {
1050 if (saved instanceof SavedContext)
1051 { return new Context(doc, copyState(doc.mode, saved.state), line, saved.lookAhead) }
1052 else
1053 { return new Context(doc, copyState(doc.mode, saved), line) }
1054 };
1055
1056 Context.prototype.save = function (copy) {
1057 var state = copy !== false ? copyState(this.doc.mode, this.state) : this.state;
1058 return this.maxLookAhead > 0 ? new SavedContext(state, this.maxLookAhead) : state
1059 };
1060
1061
1062 // Compute a style array (an array starting with a mode generation
1063 // -- for invalidation -- followed by pairs of end positions and
1064 // style strings), which is used to highlight the tokens on the
1065 // line.
1066 function highlightLine(cm, line, context, forceToEnd) {
1067 // A styles array always starts with a number identifying the
1068 // mode/overlays that it is based on (for easy invalidation).
1069 var st = [cm.state.modeGen], lineClasses = {};
1070 // Compute the base array of styles
1071 runMode(cm, line.text, cm.doc.mode, context, function (end, style) { return st.push(end, style); },
1072 lineClasses, forceToEnd);
1073 var state = context.state;
1074
1075 // Run overlays, adjust style array.
1076 var loop = function ( o ) {
1077 context.baseTokens = st;
1078 var overlay = cm.state.overlays[o], i = 1, at = 0;
1079 context.state = true;
1080 runMode(cm, line.text, overlay.mode, context, function (end, style) {
1081 var start = i;
1082 // Ensure there's a token end at the current position, and that i points at it
1083 while (at < end) {
1084 var i_end = st[i];
1085 if (i_end > end)
1086 { st.splice(i, 1, end, st[i+1], i_end); }
1087 i += 2;
1088 at = Math.min(end, i_end);
1089 }
1090 if (!style) { return }
1091 if (overlay.opaque) {
1092 st.splice(start, i - start, end, "overlay " + style);
1093 i = start + 2;
1094 } else {
1095 for (; start < i; start += 2) {
1096 var cur = st[start+1];
1097 st[start+1] = (cur ? cur + " " : "") + "overlay " + style;
1098 }
1099 }
1100 }, lineClasses);
1101 context.state = state;
1102 context.baseTokens = null;
1103 context.baseTokenPos = 1;
1104 };
1105
1106 for (var o = 0; o < cm.state.overlays.length; ++o) loop( o );
1107
1108 return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}
1109 }
1110
1111 function getLineStyles(cm, line, updateFrontier) {
1112 if (!line.styles || line.styles[0] != cm.state.modeGen) {
1113 var context = getContextBefore(cm, lineNo(line));
1114 var resetState = line.text.length > cm.options.maxHighlightLength && copyState(cm.doc.mode, context.state);
1115 var result = highlightLine(cm, line, context);
1116 if (resetState) { context.state = resetState; }
1117 line.stateAfter = context.save(!resetState);
1118 line.styles = result.styles;
1119 if (result.classes) { line.styleClasses = result.classes; }
1120 else if (line.styleClasses) { line.styleClasses = null; }
1121 if (updateFrontier === cm.doc.highlightFrontier)
1122 { cm.doc.modeFrontier = Math.max(cm.doc.modeFrontier, ++cm.doc.highlightFrontier); }
1123 }
1124 return line.styles
1125 }
1126
1127 function getContextBefore(cm, n, precise) {
1128 var doc = cm.doc, display = cm.display;
1129 if (!doc.mode.startState) { return new Context(doc, true, n) }
1130 var start = findStartLine(cm, n, precise);
1131 var saved = start > doc.first && getLine(doc, start - 1).stateAfter;
1132 var context = saved ? Context.fromSaved(doc, saved, start) : new Context(doc, startState(doc.mode), start);
1133
1134 doc.iter(start, n, function (line) {
1135 processLine(cm, line.text, context);
1136 var pos = context.line;
1137 line.stateAfter = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo ? context.save() : null;
1138 context.nextLine();
1139 });
1140 if (precise) { doc.modeFrontier = context.line; }
1141 return context
1142 }
1143
1144 // Lightweight form of highlight -- proceed over this line and
1145 // update state, but don't save a style array. Used for lines that
1146 // aren't currently visible.
1147 function processLine(cm, text, context, startAt) {
1148 var mode = cm.doc.mode;
1149 var stream = new StringStream(text, cm.options.tabSize, context);
1150 stream.start = stream.pos = startAt || 0;
1151 if (text == "") { callBlankLine(mode, context.state); }
1152 while (!stream.eol()) {
1153 readToken(mode, stream, context.state);
1154 stream.start = stream.pos;
1155 }
1156 }
1157
1158 function callBlankLine(mode, state) {
1159 if (mode.blankLine) { return mode.blankLine(state) }
1160 if (!mode.innerMode) { return }
1161 var inner = innerMode(mode, state);
1162 if (inner.mode.blankLine) { return inner.mode.blankLine(inner.state) }
1163 }
1164
1165 function readToken(mode, stream, state, inner) {
1166 for (var i = 0; i < 10; i++) {
1167 if (inner) { inner[0] = innerMode(mode, state).mode; }
1168 var style = mode.token(stream, state);
1169 if (stream.pos > stream.start) { return style }
1170 }
1171 throw new Error("Mode " + mode.name + " failed to advance stream.")
1172 }
1173
1174 var Token = function(stream, type, state) {
1175 this.start = stream.start; this.end = stream.pos;
1176 this.string = stream.current();
1177 this.type = type || null;
1178 this.state = state;
1179 };
1180
1181 // Utility for getTokenAt and getLineTokens
1182 function takeToken(cm, pos, precise, asArray) {
1183 var doc = cm.doc, mode = doc.mode, style;
1184 pos = clipPos(doc, pos);
1185 var line = getLine(doc, pos.line), context = getContextBefore(cm, pos.line, precise);
1186 var stream = new StringStream(line.text, cm.options.tabSize, context), tokens;
1187 if (asArray) { tokens = []; }
1188 while ((asArray || stream.pos < pos.ch) && !stream.eol()) {
1189 stream.start = stream.pos;
1190 style = readToken(mode, stream, context.state);
1191 if (asArray) { tokens.push(new Token(stream, style, copyState(doc.mode, context.state))); }
1192 }
1193 return asArray ? tokens : new Token(stream, style, context.state)
1194 }
1195
1196 function extractLineClasses(type, output) {
1197 if (type) { for (;;) {
1198 var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/);
1199 if (!lineClass) { break }
1200 type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length);
1201 var prop = lineClass[1] ? "bgClass" : "textClass";
1202 if (output[prop] == null)
1203 { output[prop] = lineClass[2]; }
1204 else if (!(new RegExp("(?:^|\\s)" + lineClass[2] + "(?:$|\\s)")).test(output[prop]))
1205 { output[prop] += " " + lineClass[2]; }
1206 } }
1207 return type
1208 }
1209
1210 // Run the given mode's parser over a line, calling f for each token.
1211 function runMode(cm, text, mode, context, f, lineClasses, forceToEnd) {
1212 var flattenSpans = mode.flattenSpans;
1213 if (flattenSpans == null) { flattenSpans = cm.options.flattenSpans; }
1214 var curStart = 0, curStyle = null;
1215 var stream = new StringStream(text, cm.options.tabSize, context), style;
1216 var inner = cm.options.addModeClass && [null];
1217 if (text == "") { extractLineClasses(callBlankLine(mode, context.state), lineClasses); }
1218 while (!stream.eol()) {
1219 if (stream.pos > cm.options.maxHighlightLength) {
1220 flattenSpans = false;
1221 if (forceToEnd) { processLine(cm, text, context, stream.pos); }
1222 stream.pos = text.length;
1223 style = null;
1224 } else {
1225 style = extractLineClasses(readToken(mode, stream, context.state, inner), lineClasses);
1226 }
1227 if (inner) {
1228 var mName = inner[0].name;
1229 if (mName) { style = "m-" + (style ? mName + " " + style : mName); }
1230 }
1231 if (!flattenSpans || curStyle != style) {
1232 while (curStart < stream.start) {
1233 curStart = Math.min(stream.start, curStart + 5000);
1234 f(curStart, curStyle);
1235 }
1236 curStyle = style;
1237 }
1238 stream.start = stream.pos;
1239 }
1240 while (curStart < stream.pos) {
1241 // Webkit seems to refuse to render text nodes longer than 57444
1242 // characters, and returns inaccurate measurements in nodes
1243 // starting around 5000 chars.
1244 var pos = Math.min(stream.pos, curStart + 5000);
1245 f(pos, curStyle);
1246 curStart = pos;
1247 }
1248 }
1249
1250 // Finds the line to start with when starting a parse. Tries to
1251 // find a line with a stateAfter, so that it can start with a
1252 // valid state. If that fails, it returns the line with the
1253 // smallest indentation, which tends to need the least context to
1254 // parse correctly.
1255 function findStartLine(cm, n, precise) {
1256 var minindent, minline, doc = cm.doc;
1257 var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
1258 for (var search = n; search > lim; --search) {
1259 if (search <= doc.first) { return doc.first }
1260 var line = getLine(doc, search - 1), after = line.stateAfter;
1261 if (after && (!precise || search + (after instanceof SavedContext ? after.lookAhead : 0) <= doc.modeFrontier))
1262 { return search }
1263 var indented = countColumn(line.text, null, cm.options.tabSize);
1264 if (minline == null || minindent > indented) {
1265 minline = search - 1;
1266 minindent = indented;
1267 }
1268 }
1269 return minline
1270 }
1271
1272 function retreatFrontier(doc, n) {
1273 doc.modeFrontier = Math.min(doc.modeFrontier, n);
1274 if (doc.highlightFrontier < n - 10) { return }
1275 var start = doc.first;
1276 for (var line = n - 1; line > start; line--) {
1277 var saved = getLine(doc, line).stateAfter;
1278 // change is on 3
1279 // state on line 1 looked ahead 2 -- so saw 3
1280 // test 1 + 2 < 3 should cover this
1281 if (saved && (!(saved instanceof SavedContext) || line + saved.lookAhead < n)) {
1282 start = line + 1;
1283 break
1284 }
1285 }
1286 doc.highlightFrontier = Math.min(doc.highlightFrontier, start);
1287 }
1288
1289 // Optimize some code when these features are not used.
1290 var sawReadOnlySpans = false, sawCollapsedSpans = false;
1291
1292 function seeReadOnlySpans() {
1293 sawReadOnlySpans = true;
1294 }
1295
1296 function seeCollapsedSpans() {
1297 sawCollapsedSpans = true;
1298 }
1299
1300 // TEXTMARKER SPANS
1301
1302 function MarkedSpan(marker, from, to) {
1303 this.marker = marker;
1304 this.from = from; this.to = to;
1305 }
1306
1307 // Search an array of spans for a span matching the given marker.
1308 function getMarkedSpanFor(spans, marker) {
1309 if (spans) { for (var i = 0; i < spans.length; ++i) {
1310 var span = spans[i];
1311 if (span.marker == marker) { return span }
1312 } }
1313 }
1314 // Remove a span from an array, returning undefined if no spans are
1315 // left (we don't store arrays for lines without spans).
1316 function removeMarkedSpan(spans, span) {
1317 var r;
1318 for (var i = 0; i < spans.length; ++i)
1319 { if (spans[i] != span) { (r || (r = [])).push(spans[i]); } }
1320 return r
1321 }
1322 // Add a span to a line.
1323 function addMarkedSpan(line, span) {
1324 line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
1325 span.marker.attachLine(line);
1326 }
1327
1328 // Used for the algorithm that adjusts markers for a change in the
1329 // document. These functions cut an array of spans at a given
1330 // character position, returning an array of remaining chunks (or
1331 // undefined if nothing remains).
1332 function markedSpansBefore(old, startCh, isInsert) {
1333 var nw;
1334 if (old) { for (var i = 0; i < old.length; ++i) {
1335 var span = old[i], marker = span.marker;
1336 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
1337 if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
1338 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh)
1339 ;(nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to));
1340 }
1341 } }
1342 return nw
1343 }
1344 function markedSpansAfter(old, endCh, isInsert) {
1345 var nw;
1346 if (old) { for (var i = 0; i < old.length; ++i) {
1347 var span = old[i], marker = span.marker;
1348 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
1349 if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
1350 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh)
1351 ;(nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh,
1352 span.to == null ? null : span.to - endCh));
1353 }
1354 } }
1355 return nw
1356 }
1357
1358 // Given a change object, compute the new set of marker spans that
1359 // cover the line in which the change took place. Removes spans
1360 // entirely within the change, reconnects spans belonging to the
1361 // same marker that appear on both sides of the change, and cuts off
1362 // spans partially within the change. Returns an array of span
1363 // arrays with one element for each line in (after) the change.
1364 function stretchSpansOverChange(doc, change) {
1365 if (change.full) { return null }
1366 var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
1367 var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
1368 if (!oldFirst && !oldLast) { return null }
1369
1370 var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0;
1371 // Get the spans that 'stick out' on both sides
1372 var first = markedSpansBefore(oldFirst, startCh, isInsert);
1373 var last = markedSpansAfter(oldLast, endCh, isInsert);
1374
1375 // Next, merge those two ends
1376 var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
1377 if (first) {
1378 // Fix up .to properties of first
1379 for (var i = 0; i < first.length; ++i) {
1380 var span = first[i];
1381 if (span.to == null) {
1382 var found = getMarkedSpanFor(last, span.marker);
1383 if (!found) { span.to = startCh; }
1384 else if (sameLine) { span.to = found.to == null ? null : found.to + offset; }
1385 }
1386 }
1387 }
1388 if (last) {
1389 // Fix up .from in last (or move them into first in case of sameLine)
1390 for (var i$1 = 0; i$1 < last.length; ++i$1) {
1391 var span$1 = last[i$1];
1392 if (span$1.to != null) { span$1.to += offset; }
1393 if (span$1.from == null) {
1394 var found$1 = getMarkedSpanFor(first, span$1.marker);
1395 if (!found$1) {
1396 span$1.from = offset;
1397 if (sameLine) { (first || (first = [])).push(span$1); }
1398 }
1399 } else {
1400 span$1.from += offset;
1401 if (sameLine) { (first || (first = [])).push(span$1); }
1402 }
1403 }
1404 }
1405 // Make sure we didn't create any zero-length spans
1406 if (first) { first = clearEmptySpans(first); }
1407 if (last && last != first) { last = clearEmptySpans(last); }
1408
1409 var newMarkers = [first];
1410 if (!sameLine) {
1411 // Fill gap with whole-line-spans
1412 var gap = change.text.length - 2, gapMarkers;
1413 if (gap > 0 && first)
1414 { for (var i$2 = 0; i$2 < first.length; ++i$2)
1415 { if (first[i$2].to == null)
1416 { (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i$2].marker, null, null)); } } }
1417 for (var i$3 = 0; i$3 < gap; ++i$3)
1418 { newMarkers.push(gapMarkers); }
1419 newMarkers.push(last);
1420 }
1421 return newMarkers
1422 }
1423
1424 // Remove spans that are empty and don't have a clearWhenEmpty
1425 // option of false.
1426 function clearEmptySpans(spans) {
1427 for (var i = 0; i < spans.length; ++i) {
1428 var span = spans[i];
1429 if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
1430 { spans.splice(i--, 1); }
1431 }
1432 if (!spans.length) { return null }
1433 return spans
1434 }
1435
1436 // Used to 'clip' out readOnly ranges when making a change.
1437 function removeReadOnlyRanges(doc, from, to) {
1438 var markers = null;
1439 doc.iter(from.line, to.line + 1, function (line) {
1440 if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
1441 var mark = line.markedSpans[i].marker;
1442 if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
1443 { (markers || (markers = [])).push(mark); }
1444 } }
1445 });
1446 if (!markers) { return null }
1447 var parts = [{from: from, to: to}];
1448 for (var i = 0; i < markers.length; ++i) {
1449 var mk = markers[i], m = mk.find(0);
1450 for (var j = 0; j < parts.length; ++j) {
1451 var p = parts[j];
1452 if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) { continue }
1453 var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to);
1454 if (dfrom < 0 || !mk.inclusiveLeft && !dfrom)
1455 { newParts.push({from: p.from, to: m.from}); }
1456 if (dto > 0 || !mk.inclusiveRight && !dto)
1457 { newParts.push({from: m.to, to: p.to}); }
1458 parts.splice.apply(parts, newParts);
1459 j += newParts.length - 3;
1460 }
1461 }
1462 return parts
1463 }
1464
1465 // Connect or disconnect spans from a line.
1466 function detachMarkedSpans(line) {
1467 var spans = line.markedSpans;
1468 if (!spans) { return }
1469 for (var i = 0; i < spans.length; ++i)
1470 { spans[i].marker.detachLine(line); }
1471 line.markedSpans = null;
1472 }
1473 function attachMarkedSpans(line, spans) {
1474 if (!spans) { return }
1475 for (var i = 0; i < spans.length; ++i)
1476 { spans[i].marker.attachLine(line); }
1477 line.markedSpans = spans;
1478 }
1479
1480 // Helpers used when computing which overlapping collapsed span
1481 // counts as the larger one.
1482 function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0 }
1483 function extraRight(marker) { return marker.inclusiveRight ? 1 : 0 }
1484
1485 // Returns a number indicating which of two overlapping collapsed
1486 // spans is larger (and thus includes the other). Falls back to
1487 // comparing ids when the spans cover exactly the same range.
1488 function compareCollapsedMarkers(a, b) {
1489 var lenDiff = a.lines.length - b.lines.length;
1490 if (lenDiff != 0) { return lenDiff }
1491 var aPos = a.find(), bPos = b.find();
1492 var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
1493 if (fromCmp) { return -fromCmp }
1494 var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
1495 if (toCmp) { return toCmp }
1496 return b.id - a.id
1497 }
1498
1499 // Find out whether a line ends or starts in a collapsed span. If
1500 // so, return the marker for that span.
1501 function collapsedSpanAtSide(line, start) {
1502 var sps = sawCollapsedSpans && line.markedSpans, found;
1503 if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
1504 sp = sps[i];
1505 if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
1506 (!found || compareCollapsedMarkers(found, sp.marker) < 0))
1507 { found = sp.marker; }
1508 } }
1509 return found
1510 }
1511 function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true) }
1512 function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false) }
1513
1514 function collapsedSpanAround(line, ch) {
1515 var sps = sawCollapsedSpans && line.markedSpans, found;
1516 if (sps) { for (var i = 0; i < sps.length; ++i) {
1517 var sp = sps[i];
1518 if (sp.marker.collapsed && (sp.from == null || sp.from < ch) && (sp.to == null || sp.to > ch) &&
1519 (!found || compareCollapsedMarkers(found, sp.marker) < 0)) { found = sp.marker; }
1520 } }
1521 return found
1522 }
1523
1524 // Test whether there exists a collapsed span that partially
1525 // overlaps (covers the start or end, but not both) of a new span.
1526 // Such overlap is not allowed.
1527 function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
1528 var line = getLine(doc, lineNo);
1529 var sps = sawCollapsedSpans && line.markedSpans;
1530 if (sps) { for (var i = 0; i < sps.length; ++i) {
1531 var sp = sps[i];
1532 if (!sp.marker.collapsed) { continue }
1533 var found = sp.marker.find(0);
1534 var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
1535 var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
1536 if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) { continue }
1537 if (fromCmp <= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) ||
1538 fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0))
1539 { return true }
1540 } }
1541 }
1542
1543 // A visual line is a line as drawn on the screen. Folding, for
1544 // example, can cause multiple logical lines to appear on the same
1545 // visual line. This finds the start of the visual line that the
1546 // given line is part of (usually that is the line itself).
1547 function visualLine(line) {
1548 var merged;
1549 while (merged = collapsedSpanAtStart(line))
1550 { line = merged.find(-1, true).line; }
1551 return line
1552 }
1553
1554 function visualLineEnd(line) {
1555 var merged;
1556 while (merged = collapsedSpanAtEnd(line))
1557 { line = merged.find(1, true).line; }
1558 return line
1559 }
1560
1561 // Returns an array of logical lines that continue the visual line
1562 // started by the argument, or undefined if there are no such lines.
1563 function visualLineContinued(line) {
1564 var merged, lines;
1565 while (merged = collapsedSpanAtEnd(line)) {
1566 line = merged.find(1, true).line
1567 ;(lines || (lines = [])).push(line);
1568 }
1569 return lines
1570 }
1571
1572 // Get the line number of the start of the visual line that the
1573 // given line number is part of.
1574 function visualLineNo(doc, lineN) {
1575 var line = getLine(doc, lineN), vis = visualLine(line);
1576 if (line == vis) { return lineN }
1577 return lineNo(vis)
1578 }
1579
1580 // Get the line number of the start of the next visual line after
1581 // the given line.
1582 function visualLineEndNo(doc, lineN) {
1583 if (lineN > doc.lastLine()) { return lineN }
1584 var line = getLine(doc, lineN), merged;
1585 if (!lineIsHidden(doc, line)) { return lineN }
1586 while (merged = collapsedSpanAtEnd(line))
1587 { line = merged.find(1, true).line; }
1588 return lineNo(line) + 1
1589 }
1590
1591 // Compute whether a line is hidden. Lines count as hidden when they
1592 // are part of a visual line that starts with another line, or when
1593 // they are entirely covered by collapsed, non-widget span.
1594 function lineIsHidden(doc, line) {
1595 var sps = sawCollapsedSpans && line.markedSpans;
1596 if (sps) { for (var sp = (void 0), i = 0; i < sps.length; ++i) {
1597 sp = sps[i];
1598 if (!sp.marker.collapsed) { continue }
1599 if (sp.from == null) { return true }
1600 if (sp.marker.widgetNode) { continue }
1601 if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
1602 { return true }
1603 } }
1604 }
1605 function lineIsHiddenInner(doc, line, span) {
1606 if (span.to == null) {
1607 var end = span.marker.find(1, true);
1608 return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker))
1609 }
1610 if (span.marker.inclusiveRight && span.to == line.text.length)
1611 { return true }
1612 for (var sp = (void 0), i = 0; i < line.markedSpans.length; ++i) {
1613 sp = line.markedSpans[i];
1614 if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to &&
1615 (sp.to == null || sp.to != span.from) &&
1616 (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
1617 lineIsHiddenInner(doc, line, sp)) { return true }
1618 }
1619 }
1620
1621 // Find the height above the given line.
1622 function heightAtLine(lineObj) {
1623 lineObj = visualLine(lineObj);
1624
1625 var h = 0, chunk = lineObj.parent;
1626 for (var i = 0; i < chunk.lines.length; ++i) {
1627 var line = chunk.lines[i];
1628 if (line == lineObj) { break }
1629 else { h += line.height; }
1630 }
1631 for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
1632 for (var i$1 = 0; i$1 < p.children.length; ++i$1) {
1633 var cur = p.children[i$1];
1634 if (cur == chunk) { break }
1635 else { h += cur.height; }
1636 }
1637 }
1638 return h
1639 }
1640
1641 // Compute the character length of a line, taking into account
1642 // collapsed ranges (see markText) that might hide parts, and join
1643 // other lines onto it.
1644 function lineLength(line) {
1645 if (line.height == 0) { return 0 }
1646 var len = line.text.length, merged, cur = line;
1647 while (merged = collapsedSpanAtStart(cur)) {
1648 var found = merged.find(0, true);
1649 cur = found.from.line;
1650 len += found.from.ch - found.to.ch;
1651 }
1652 cur = line;
1653 while (merged = collapsedSpanAtEnd(cur)) {
1654 var found$1 = merged.find(0, true);
1655 len -= cur.text.length - found$1.from.ch;
1656 cur = found$1.to.line;
1657 len += cur.text.length - found$1.to.ch;
1658 }
1659 return len
1660 }
1661
1662 // Find the longest line in the document.
1663 function findMaxLine(cm) {
1664 var d = cm.display, doc = cm.doc;
1665 d.maxLine = getLine(doc, doc.first);
1666 d.maxLineLength = lineLength(d.maxLine);
1667 d.maxLineChanged = true;
1668 doc.iter(function (line) {
1669 var len = lineLength(line);
1670 if (len > d.maxLineLength) {
1671 d.maxLineLength = len;
1672 d.maxLine = line;
1673 }
1674 });
1675 }
1676
1677 // LINE DATA STRUCTURE
1678
1679 // Line objects. These hold state related to a line, including
1680 // highlighting info (the styles array).
1681 var Line = function(text, markedSpans, estimateHeight) {
1682 this.text = text;
1683 attachMarkedSpans(this, markedSpans);
1684 this.height = estimateHeight ? estimateHeight(this) : 1;
1685 };
1686
1687 Line.prototype.lineNo = function () { return lineNo(this) };
1688 eventMixin(Line);
1689
1690 // Change the content (text, markers) of a line. Automatically
1691 // invalidates cached information and tries to re-estimate the
1692 // line's height.
1693 function updateLine(line, text, markedSpans, estimateHeight) {
1694 line.text = text;
1695 if (line.stateAfter) { line.stateAfter = null; }
1696 if (line.styles) { line.styles = null; }
1697 if (line.order != null) { line.order = null; }
1698 detachMarkedSpans(line);
1699 attachMarkedSpans(line, markedSpans);
1700 var estHeight = estimateHeight ? estimateHeight(line) : 1;
1701 if (estHeight != line.height) { updateLineHeight(line, estHeight); }
1702 }
1703
1704 // Detach a line from the document tree and its markers.
1705 function cleanUpLine(line) {
1706 line.parent = null;
1707 detachMarkedSpans(line);
1708 }
1709
1710 // Convert a style as returned by a mode (either null, or a string
1711 // containing one or more styles) to a CSS style. This is cached,
1712 // and also looks for line-wide styles.
1713 var styleToClassCache = {}, styleToClassCacheWithMode = {};
1714 function interpretTokenStyle(style, options) {
1715 if (!style || /^\s*$/.test(style)) { return null }
1716 var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
1717 return cache[style] ||
1718 (cache[style] = style.replace(/\S+/g, "cm-$&"))
1719 }
1720
1721 // Render the DOM representation of the text of a line. Also builds
1722 // up a 'line map', which points at the DOM nodes that represent
1723 // specific stretches of text, and is used by the measuring code.
1724 // The returned object contains the DOM node, this map, and
1725 // information about line-wide styles that were set by the mode.
1726 function buildLineContent(cm, lineView) {
1727 // The padding-right forces the element to have a 'border', which
1728 // is needed on Webkit to be able to get line-level bounding
1729 // rectangles for it (in measureChar).
1730 var content = eltP("span", null, null, webkit ? "padding-right: .1px" : null);
1731 var builder = {pre: eltP("pre", [content], "CodeMirror-line"), content: content,
1732 col: 0, pos: 0, cm: cm,
1733 trailingSpace: false,
1734 splitSpaces: cm.getOption("lineWrapping")};
1735 lineView.measure = {};
1736
1737 // Iterate over the logical lines that make up this visual line.
1738 for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) {
1739 var line = i ? lineView.rest[i - 1] : lineView.line, order = (void 0);
1740 builder.pos = 0;
1741 builder.addToken = buildToken;
1742 // Optionally wire in some hacks into the token-rendering
1743 // algorithm, to deal with browser quirks.
1744 if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line, cm.doc.direction)))
1745 { builder.addToken = buildTokenBadBidi(builder.addToken, order); }
1746 builder.map = [];
1747 var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line);
1748 insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate));
1749 if (line.styleClasses) {
1750 if (line.styleClasses.bgClass)
1751 { builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); }
1752 if (line.styleClasses.textClass)
1753 { builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); }
1754 }
1755
1756 // Ensure at least a single node is present, for measuring.
1757 if (builder.map.length == 0)
1758 { builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); }
1759
1760 // Store the map and a cache object for the current logical line
1761 if (i == 0) {
1762 lineView.measure.map = builder.map;
1763 lineView.measure.cache = {};
1764 } else {
1765 (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map)
1766 ;(lineView.measure.caches || (lineView.measure.caches = [])).push({});
1767 }
1768 }
1769
1770 // See issue #2901
1771 if (webkit) {
1772 var last = builder.content.lastChild;
1773 if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab")))
1774 { builder.content.className = "cm-tab-wrap-hack"; }
1775 }
1776
1777 signal(cm, "renderLine", cm, lineView.line, builder.pre);
1778 if (builder.pre.className)
1779 { builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); }
1780
1781 return builder
1782 }
1783
1784 function defaultSpecialCharPlaceholder(ch) {
1785 var token = elt("span", "\u2022", "cm-invalidchar");
1786 token.title = "\\u" + ch.charCodeAt(0).toString(16);
1787 token.setAttribute("aria-label", token.title);
1788 return token
1789 }
1790
1791 // Build up the DOM representation for a single token, and add it to
1792 // the line map. Takes care to render special characters separately.
1793 function buildToken(builder, text, style, startStyle, endStyle, css, attributes) {
1794 if (!text) { return }
1795 var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text;
1796 var special = builder.cm.state.specialChars, mustWrap = false;
1797 var content;
1798 if (!special.test(text)) {
1799 builder.col += text.length;
1800 content = document.createTextNode(displayText);
1801 builder.map.push(builder.pos, builder.pos + text.length, content);
1802 if (ie && ie_version < 9) { mustWrap = true; }
1803 builder.pos += text.length;
1804 } else {
1805 content = document.createDocumentFragment();
1806 var pos = 0;
1807 while (true) {
1808 special.lastIndex = pos;
1809 var m = special.exec(text);
1810 var skipped = m ? m.index - pos : text.length - pos;
1811 if (skipped) {
1812 var txt = document.createTextNode(displayText.slice(pos, pos + skipped));
1813 if (ie && ie_version < 9) { content.appendChild(elt("span", [txt])); }
1814 else { content.appendChild(txt); }
1815 builder.map.push(builder.pos, builder.pos + skipped, txt);
1816 builder.col += skipped;
1817 builder.pos += skipped;
1818 }
1819 if (!m) { break }
1820 pos += skipped + 1;
1821 var txt$1 = (void 0);
1822 if (m[0] == "\t") {
1823 var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
1824 txt$1 = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
1825 txt$1.setAttribute("role", "presentation");
1826 txt$1.setAttribute("cm-text", "\t");
1827 builder.col += tabWidth;
1828 } else if (m[0] == "\r" || m[0] == "\n") {
1829 txt$1 = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar"));
1830 txt$1.setAttribute("cm-text", m[0]);
1831 builder.col += 1;
1832 } else {
1833 txt$1 = builder.cm.options.specialCharPlaceholder(m[0]);
1834 txt$1.setAttribute("cm-text", m[0]);
1835 if (ie && ie_version < 9) { content.appendChild(elt("span", [txt$1])); }
1836 else { content.appendChild(txt$1); }
1837 builder.col += 1;
1838 }
1839 builder.map.push(builder.pos, builder.pos + 1, txt$1);
1840 builder.pos++;
1841 }
1842 }
1843 builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32;
1844 if (style || startStyle || endStyle || mustWrap || css || attributes) {
1845 var fullStyle = style || "";
1846 if (startStyle) { fullStyle += startStyle; }
1847 if (endStyle) { fullStyle += endStyle; }
1848 var token = elt("span", [content], fullStyle, css);
1849 if (attributes) {
1850 for (var attr in attributes) { if (attributes.hasOwnProperty(attr) && attr != "style" && attr != "class")
1851 { token.setAttribute(attr, attributes[attr]); } }
1852 }
1853 return builder.content.appendChild(token)
1854 }
1855 builder.content.appendChild(content);
1856 }
1857
1858 // Change some spaces to NBSP to prevent the browser from collapsing
1859 // trailing spaces at the end of a line when rendering text (issue #1362).
1860 function splitSpaces(text, trailingBefore) {
1861 if (text.length > 1 && !/ /.test(text)) { return text }
1862 var spaceBefore = trailingBefore, result = "";
1863 for (var i = 0; i < text.length; i++) {
1864 var ch = text.charAt(i);
1865 if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32))
1866 { ch = "\u00a0"; }
1867 result += ch;
1868 spaceBefore = ch == " ";
1869 }
1870 return result
1871 }
1872
1873 // Work around nonsense dimensions being reported for stretches of
1874 // right-to-left text.
1875 function buildTokenBadBidi(inner, order) {
1876 return function (builder, text, style, startStyle, endStyle, css, attributes) {
1877 style = style ? style + " cm-force-border" : "cm-force-border";
1878 var start = builder.pos, end = start + text.length;
1879 for (;;) {
1880 // Find the part that overlaps with the start of this text
1881 var part = (void 0);
1882 for (var i = 0; i < order.length; i++) {
1883 part = order[i];
1884 if (part.to > start && part.from <= start) { break }
1885 }
1886 if (part.to >= end) { return inner(builder, text, style, startStyle, endStyle, css, attributes) }
1887 inner(builder, text.slice(0, part.to - start), style, startStyle, null, css, attributes);
1888 startStyle = null;
1889 text = text.slice(part.to - start);
1890 start = part.to;
1891 }
1892 }
1893 }
1894
1895 function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
1896 var widget = !ignoreWidget && marker.widgetNode;
1897 if (widget) { builder.map.push(builder.pos, builder.pos + size, widget); }
1898 if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) {
1899 if (!widget)
1900 { widget = builder.content.appendChild(document.createElement("span")); }
1901 widget.setAttribute("cm-marker", marker.id);
1902 }
1903 if (widget) {
1904 builder.cm.display.input.setUneditable(widget);
1905 builder.content.appendChild(widget);
1906 }
1907 builder.pos += size;
1908 builder.trailingSpace = false;
1909 }
1910
1911 // Outputs a number of spans to make up a line, taking highlighting
1912 // and marked text into account.
1913 function insertLineContent(line, builder, styles) {
1914 var spans = line.markedSpans, allText = line.text, at = 0;
1915 if (!spans) {
1916 for (var i$1 = 1; i$1 < styles.length; i$1+=2)
1917 { builder.addToken(builder, allText.slice(at, at = styles[i$1]), interpretTokenStyle(styles[i$1+1], builder.cm.options)); }
1918 return
1919 }
1920
1921 var len = allText.length, pos = 0, i = 1, text = "", style, css;
1922 var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed, attributes;
1923 for (;;) {
1924 if (nextChange == pos) { // Update current marker set
1925 spanStyle = spanEndStyle = spanStartStyle = css = "";
1926 attributes = null;
1927 collapsed = null; nextChange = Infinity;
1928 var foundBookmarks = [], endStyles = (void 0);
1929 for (var j = 0; j < spans.length; ++j) {
1930 var sp = spans[j], m = sp.marker;
1931 if (m.type == "bookmark" && sp.from == pos && m.widgetNode) {
1932 foundBookmarks.push(m);
1933 } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) {
1934 if (sp.to != null && sp.to != pos && nextChange > sp.to) {
1935 nextChange = sp.to;
1936 spanEndStyle = "";
1937 }
1938 if (m.className) { spanStyle += " " + m.className; }
1939 if (m.css) { css = (css ? css + ";" : "") + m.css; }
1940 if (m.startStyle && sp.from == pos) { spanStartStyle += " " + m.startStyle; }
1941 if (m.endStyle && sp.to == nextChange) { (endStyles || (endStyles = [])).push(m.endStyle, sp.to); }
1942 // support for the old title property
1943 // https://github.com/codemirror/CodeMirror/pull/5673
1944 if (m.title) { (attributes || (attributes = {})).title = m.title; }
1945 if (m.attributes) {
1946 for (var attr in m.attributes)
1947 { (attributes || (attributes = {}))[attr] = m.attributes[attr]; }
1948 }
1949 if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
1950 { collapsed = sp; }
1951 } else if (sp.from > pos && nextChange > sp.from) {
1952 nextChange = sp.from;
1953 }
1954 }
1955 if (endStyles) { for (var j$1 = 0; j$1 < endStyles.length; j$1 += 2)
1956 { if (endStyles[j$1 + 1] == nextChange) { spanEndStyle += " " + endStyles[j$1]; } } }
1957
1958 if (!collapsed || collapsed.from == pos) { for (var j$2 = 0; j$2 < foundBookmarks.length; ++j$2)
1959 { buildCollapsedSpan(builder, 0, foundBookmarks[j$2]); } }
1960 if (collapsed && (collapsed.from || 0) == pos) {
1961 buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos,
1962 collapsed.marker, collapsed.from == null);
1963 if (collapsed.to == null) { return }
1964 if (collapsed.to == pos) { collapsed = false; }
1965 }
1966 }
1967 if (pos >= len) { break }
1968
1969 var upto = Math.min(len, nextChange);
1970 while (true) {
1971 if (text) {
1972 var end = pos + text.length;
1973 if (!collapsed) {
1974 var tokenText = end > upto ? text.slice(0, upto - pos) : text;
1975 builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
1976 spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", css, attributes);
1977 }
1978 if (end >= upto) {text = text.slice(upto - pos); pos = upto; break}
1979 pos = end;
1980 spanStartStyle = "";
1981 }
1982 text = allText.slice(at, at = styles[i++]);
1983 style = interpretTokenStyle(styles[i++], builder.cm.options);
1984 }
1985 }
1986 }
1987
1988
1989 // These objects are used to represent the visible (currently drawn)
1990 // part of the document. A LineView may correspond to multiple
1991 // logical lines, if those are connected by collapsed ranges.
1992 function LineView(doc, line, lineN) {
1993 // The starting line
1994 this.line = line;
1995 // Continuing lines, if any
1996 this.rest = visualLineContinued(line);
1997 // Number of logical lines in this visual line
1998 this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1;
1999 this.node = this.text = null;
2000 this.hidden = lineIsHidden(doc, line);
2001 }
2002
2003 // Create a range of LineView objects for the given lines.
2004 function buildViewArray(cm, from, to) {
2005 var array = [], nextPos;
2006 for (var pos = from; pos < to; pos = nextPos) {
2007 var view = new LineView(cm.doc, getLine(cm.doc, pos), pos);
2008 nextPos = pos + view.size;
2009 array.push(view);
2010 }
2011 return array
2012 }
2013
2014 var operationGroup = null;
2015
2016 function pushOperation(op) {
2017 if (operationGroup) {
2018 operationGroup.ops.push(op);
2019 } else {
2020 op.ownsGroup = operationGroup = {
2021 ops: [op],
2022 delayedCallbacks: []
2023 };
2024 }
2025 }
2026
2027 function fireCallbacksForOps(group) {
2028 // Calls delayed callbacks and cursorActivity handlers until no
2029 // new ones appear
2030 var callbacks = group.delayedCallbacks, i = 0;
2031 do {
2032 for (; i < callbacks.length; i++)
2033 { callbacks[i].call(null); }
2034 for (var j = 0; j < group.ops.length; j++) {
2035 var op = group.ops[j];
2036 if (op.cursorActivityHandlers)
2037 { while (op.cursorActivityCalled < op.cursorActivityHandlers.length)
2038 { op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } }
2039 }
2040 } while (i < callbacks.length)
2041 }
2042
2043 function finishOperation(op, endCb) {
2044 var group = op.ownsGroup;
2045 if (!group) { return }
2046
2047 try { fireCallbacksForOps(group); }
2048 finally {
2049 operationGroup = null;
2050 endCb(group);
2051 }
2052 }
2053
2054 var orphanDelayedCallbacks = null;
2055
2056 // Often, we want to signal events at a point where we are in the
2057 // middle of some work, but don't want the handler to start calling
2058 // other methods on the editor, which might be in an inconsistent
2059 // state or simply not expect any other events to happen.
2060 // signalLater looks whether there are any handlers, and schedules
2061 // them to be executed when the last operation ends, or, if no
2062 // operation is active, when a timeout fires.
2063 function signalLater(emitter, type /*, values...*/) {
2064 var arr = getHandlers(emitter, type);
2065 if (!arr.length) { return }
2066 var args = Array.prototype.slice.call(arguments, 2), list;
2067 if (operationGroup) {
2068 list = operationGroup.delayedCallbacks;
2069 } else if (orphanDelayedCallbacks) {
2070 list = orphanDelayedCallbacks;
2071 } else {
2072 list = orphanDelayedCallbacks = [];
2073 setTimeout(fireOrphanDelayed, 0);
2074 }
2075 var loop = function ( i ) {
2076 list.push(function () { return arr[i].apply(null, args); });
2077 };
2078
2079 for (var i = 0; i < arr.length; ++i)
2080 loop( i );
2081 }
2082
2083 function fireOrphanDelayed() {
2084 var delayed = orphanDelayedCallbacks;
2085 orphanDelayedCallbacks = null;
2086 for (var i = 0; i < delayed.length; ++i) { delayed[i](); }
2087 }
2088
2089 // When an aspect of a line changes, a string is added to
2090 // lineView.changes. This updates the relevant part of the line's
2091 // DOM structure.
2092 function updateLineForChanges(cm, lineView, lineN, dims) {
2093 for (var j = 0; j < lineView.changes.length; j++) {
2094 var type = lineView.changes[j];
2095 if (type == "text") { updateLineText(cm, lineView); }
2096 else if (type == "gutter") { updateLineGutter(cm, lineView, lineN, dims); }
2097 else if (type == "class") { updateLineClasses(cm, lineView); }
2098 else if (type == "widget") { updateLineWidgets(cm, lineView, dims); }
2099 }
2100 lineView.changes = null;
2101 }
2102
2103 // Lines with gutter elements, widgets or a background class need to
2104 // be wrapped, and have the extra elements added to the wrapper div
2105 function ensureLineWrapped(lineView) {
2106 if (lineView.node == lineView.text) {
2107 lineView.node = elt("div", null, null, "position: relative");
2108 if (lineView.text.parentNode)
2109 { lineView.text.parentNode.replaceChild(lineView.node, lineView.text); }
2110 lineView.node.appendChild(lineView.text);
2111 if (ie && ie_version < 8) { lineView.node.style.zIndex = 2; }
2112 }
2113 return lineView.node
2114 }
2115
2116 function updateLineBackground(cm, lineView) {
2117 var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass;
2118 if (cls) { cls += " CodeMirror-linebackground"; }
2119 if (lineView.background) {
2120 if (cls) { lineView.background.className = cls; }
2121 else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; }
2122 } else if (cls) {
2123 var wrap = ensureLineWrapped(lineView);
2124 lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild);
2125 cm.display.input.setUneditable(lineView.background);
2126 }
2127 }
2128
2129 // Wrapper around buildLineContent which will reuse the structure
2130 // in display.externalMeasured when possible.
2131 function getLineContent(cm, lineView) {
2132 var ext = cm.display.externalMeasured;
2133 if (ext && ext.line == lineView.line) {
2134 cm.display.externalMeasured = null;
2135 lineView.measure = ext.measure;
2136 return ext.built
2137 }
2138 return buildLineContent(cm, lineView)
2139 }
2140
2141 // Redraw the line's text. Interacts with the background and text
2142 // classes because the mode may output tokens that influence these
2143 // classes.
2144 function updateLineText(cm, lineView) {
2145 var cls = lineView.text.className;
2146 var built = getLineContent(cm, lineView);
2147 if (lineView.text == lineView.node) { lineView.node = built.pre; }
2148 lineView.text.parentNode.replaceChild(built.pre, lineView.text);
2149 lineView.text = built.pre;
2150 if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) {
2151 lineView.bgClass = built.bgClass;
2152 lineView.textClass = built.textClass;
2153 updateLineClasses(cm, lineView);
2154 } else if (cls) {
2155 lineView.text.className = cls;
2156 }
2157 }
2158
2159 function updateLineClasses(cm, lineView) {
2160 updateLineBackground(cm, lineView);
2161 if (lineView.line.wrapClass)
2162 { ensureLineWrapped(lineView).className = lineView.line.wrapClass; }
2163 else if (lineView.node != lineView.text)
2164 { lineView.node.className = ""; }
2165 var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass;
2166 lineView.text.className = textClass || "";
2167 }
2168
2169 function updateLineGutter(cm, lineView, lineN, dims) {
2170 if (lineView.gutter) {
2171 lineView.node.removeChild(lineView.gutter);
2172 lineView.gutter = null;
2173 }
2174 if (lineView.gutterBackground) {
2175 lineView.node.removeChild(lineView.gutterBackground);
2176 lineView.gutterBackground = null;
2177 }
2178 if (lineView.line.gutterClass) {
2179 var wrap = ensureLineWrapped(lineView);
2180 lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass,
2181 ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + (dims.gutterTotalWidth) + "px"));
2182 cm.display.input.setUneditable(lineView.gutterBackground);
2183 wrap.insertBefore(lineView.gutterBackground, lineView.text);
2184 }
2185 var markers = lineView.line.gutterMarkers;
2186 if (cm.options.lineNumbers || markers) {
2187 var wrap$1 = ensureLineWrapped(lineView);
2188 var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", ("left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"));
2189 cm.display.input.setUneditable(gutterWrap);
2190 wrap$1.insertBefore(gutterWrap, lineView.text);
2191 if (lineView.line.gutterClass)
2192 { gutterWrap.className += " " + lineView.line.gutterClass; }
2193 if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
2194 { lineView.lineNumber = gutterWrap.appendChild(
2195 elt("div", lineNumberFor(cm.options, lineN),
2196 "CodeMirror-linenumber CodeMirror-gutter-elt",
2197 ("left: " + (dims.gutterLeft["CodeMirror-linenumbers"]) + "px; width: " + (cm.display.lineNumInnerWidth) + "px"))); }
2198 if (markers) { for (var k = 0; k < cm.display.gutterSpecs.length; ++k) {
2199 var id = cm.display.gutterSpecs[k].className, found = markers.hasOwnProperty(id) && markers[id];
2200 if (found)
2201 { gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt",
2202 ("left: " + (dims.gutterLeft[id]) + "px; width: " + (dims.gutterWidth[id]) + "px"))); }
2203 } }
2204 }
2205 }
2206
2207 function updateLineWidgets(cm, lineView, dims) {
2208 if (lineView.alignable) { lineView.alignable = null; }
2209 var isWidget = classTest("CodeMirror-linewidget");
2210 for (var node = lineView.node.firstChild, next = (void 0); node; node = next) {
2211 next = node.nextSibling;
2212 if (isWidget.test(node.className)) { lineView.node.removeChild(node); }
2213 }
2214 insertLineWidgets(cm, lineView, dims);
2215 }
2216
2217 // Build a line's DOM representation from scratch
2218 function buildLineElement(cm, lineView, lineN, dims) {
2219 var built = getLineContent(cm, lineView);
2220 lineView.text = lineView.node = built.pre;
2221 if (built.bgClass) { lineView.bgClass = built.bgClass; }
2222 if (built.textClass) { lineView.textClass = built.textClass; }
2223
2224 updateLineClasses(cm, lineView);
2225 updateLineGutter(cm, lineView, lineN, dims);
2226 insertLineWidgets(cm, lineView, dims);
2227 return lineView.node
2228 }
2229
2230 // A lineView may contain multiple logical lines (when merged by
2231 // collapsed spans). The widgets for all of them need to be drawn.
2232 function insertLineWidgets(cm, lineView, dims) {
2233 insertLineWidgetsFor(cm, lineView.line, lineView, dims, true);
2234 if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
2235 { insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } }
2236 }
2237
2238 function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) {
2239 if (!line.widgets) { return }
2240 var wrap = ensureLineWrapped(lineView);
2241 for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
2242 var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget" + (widget.className ? " " + widget.className : ""));
2243 if (!widget.handleMouseEvents) { node.setAttribute("cm-ignore-events", "true"); }
2244 positionLineWidget(widget, node, lineView, dims);
2245 cm.display.input.setUneditable(node);
2246 if (allowAbove && widget.above)
2247 { wrap.insertBefore(node, lineView.gutter || lineView.text); }
2248 else
2249 { wrap.appendChild(node); }
2250 signalLater(widget, "redraw");
2251 }
2252 }
2253
2254 function positionLineWidget(widget, node, lineView, dims) {
2255 if (widget.noHScroll) {
2256 (lineView.alignable || (lineView.alignable = [])).push(node);
2257 var width = dims.wrapperWidth;
2258 node.style.left = dims.fixedPos + "px";
2259 if (!widget.coverGutter) {
2260 width -= dims.gutterTotalWidth;
2261 node.style.paddingLeft = dims.gutterTotalWidth + "px";
2262 }
2263 node.style.width = width + "px";
2264 }
2265 if (widget.coverGutter) {
2266 node.style.zIndex = 5;
2267 node.style.position = "relative";
2268 if (!widget.noHScroll) { node.style.marginLeft = -dims.gutterTotalWidth + "px"; }
2269 }
2270 }
2271
2272 function widgetHeight(widget) {
2273 if (widget.height != null) { return widget.height }
2274 var cm = widget.doc.cm;
2275 if (!cm) { return 0 }
2276 if (!contains(document.body, widget.node)) {
2277 var parentStyle = "position: relative;";
2278 if (widget.coverGutter)
2279 { parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; }
2280 if (widget.noHScroll)
2281 { parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; }
2282 removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle));
2283 }
2284 return widget.height = widget.node.parentNode.offsetHeight
2285 }
2286
2287 // Return true when the given mouse event happened in a widget
2288 function eventInWidget(display, e) {
2289 for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
2290 if (!n || (n.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") ||
2291 (n.parentNode == display.sizer && n != display.mover))
2292 { return true }
2293 }
2294 }
2295
2296 // POSITION MEASUREMENT
2297
2298 function paddingTop(display) {return display.lineSpace.offsetTop}
2299 function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight}
2300 function paddingH(display) {
2301 if (display.cachedPaddingH) { return display.cachedPaddingH }
2302 var e = removeChildrenAndAdd(display.measure, elt("pre", "x", "CodeMirror-line-like"));
2303 var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle;
2304 var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)};
2305 if (!isNaN(data.left) && !isNaN(data.right)) { display.cachedPaddingH = data; }
2306 return data
2307 }
2308
2309 function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth }
2310 function displayWidth(cm) {
2311 return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth
2312 }
2313 function displayHeight(cm) {
2314 return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight
2315 }
2316
2317 // Ensure the lineView.wrapping.heights array is populated. This is
2318 // an array of bottom offsets for the lines that make up a drawn
2319 // line. When lineWrapping is on, there might be more than one
2320 // height.
2321 function ensureLineHeights(cm, lineView, rect) {
2322 var wrapping = cm.options.lineWrapping;
2323 var curWidth = wrapping && displayWidth(cm);
2324 if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) {
2325 var heights = lineView.measure.heights = [];
2326 if (wrapping) {
2327 lineView.measure.width = curWidth;
2328 var rects = lineView.text.firstChild.getClientRects();
2329 for (var i = 0; i < rects.length - 1; i++) {
2330 var cur = rects[i], next = rects[i + 1];
2331 if (Math.abs(cur.bottom - next.bottom) > 2)
2332 { heights.push((cur.bottom + next.top) / 2 - rect.top); }
2333 }
2334 }
2335 heights.push(rect.bottom - rect.top);
2336 }
2337 }
2338
2339 // Find a line map (mapping character offsets to text nodes) and a
2340 // measurement cache for the given line number. (A line view might
2341 // contain multiple lines when collapsed ranges are present.)
2342 function mapFromLineView(lineView, line, lineN) {
2343 if (lineView.line == line)
2344 { return {map: lineView.measure.map, cache: lineView.measure.cache} }
2345 for (var i = 0; i < lineView.rest.length; i++)
2346 { if (lineView.rest[i] == line)
2347 { return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]} } }
2348 for (var i$1 = 0; i$1 < lineView.rest.length; i$1++)
2349 { if (lineNo(lineView.rest[i$1]) > lineN)
2350 { return {map: lineView.measure.maps[i$1], cache: lineView.measure.caches[i$1], before: true} } }
2351 }
2352
2353 // Render a line into the hidden node display.externalMeasured. Used
2354 // when measurement is needed for a line that's not in the viewport.
2355 function updateExternalMeasurement(cm, line) {
2356 line = visualLine(line);
2357 var lineN = lineNo(line);
2358 var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN);
2359 view.lineN = lineN;
2360 var built = view.built = buildLineContent(cm, view);
2361 view.text = built.pre;
2362 removeChildrenAndAdd(cm.display.lineMeasure, built.pre);
2363 return view
2364 }
2365
2366 // Get a {top, bottom, left, right} box (in line-local coordinates)
2367 // for a given character.
2368 function measureChar(cm, line, ch, bias) {
2369 return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias)
2370 }
2371
2372 // Find a line view that corresponds to the given line number.
2373 function findViewForLine(cm, lineN) {
2374 if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo)
2375 { return cm.display.view[findViewIndex(cm, lineN)] }
2376 var ext = cm.display.externalMeasured;
2377 if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size)
2378 { return ext }
2379 }
2380
2381 // Measurement can be split in two steps, the set-up work that
2382 // applies to the whole line, and the measurement of the actual
2383 // character. Functions like coordsChar, that need to do a lot of
2384 // measurements in a row, can thus ensure that the set-up work is
2385 // only done once.
2386 function prepareMeasureForLine(cm, line) {
2387 var lineN = lineNo(line);
2388 var view = findViewForLine(cm, lineN);
2389 if (view && !view.text) {
2390 view = null;
2391 } else if (view && view.changes) {
2392 updateLineForChanges(cm, view, lineN, getDimensions(cm));
2393 cm.curOp.forceUpdate = true;
2394 }
2395 if (!view)
2396 { view = updateExternalMeasurement(cm, line); }
2397
2398 var info = mapFromLineView(view, line, lineN);
2399 return {
2400 line: line, view: view, rect: null,
2401 map: info.map, cache: info.cache, before: info.before,
2402 hasHeights: false
2403 }
2404 }
2405
2406 // Given a prepared measurement object, measures the position of an
2407 // actual character (or fetches it from the cache).
2408 function measureCharPrepared(cm, prepared, ch, bias, varHeight) {
2409 if (prepared.before) { ch = -1; }
2410 var key = ch + (bias || ""), found;
2411 if (prepared.cache.hasOwnProperty(key)) {
2412 found = prepared.cache[key];
2413 } else {
2414 if (!prepared.rect)
2415 { prepared.rect = prepared.view.text.getBoundingClientRect(); }
2416 if (!prepared.hasHeights) {
2417 ensureLineHeights(cm, prepared.view, prepared.rect);
2418 prepared.hasHeights = true;
2419 }
2420 found = measureCharInner(cm, prepared, ch, bias);
2421 if (!found.bogus) { prepared.cache[key] = found; }
2422 }
2423 return {left: found.left, right: found.right,
2424 top: varHeight ? found.rtop : found.top,
2425 bottom: varHeight ? found.rbottom : found.bottom}
2426 }
2427
2428 var nullRect = {left: 0, right: 0, top: 0, bottom: 0};
2429
2430 function nodeAndOffsetInLineMap(map, ch, bias) {
2431 var node, start, end, collapse, mStart, mEnd;
2432 // First, search the line map for the text node corresponding to,
2433 // or closest to, the target character.
2434 for (var i = 0; i < map.length; i += 3) {
2435 mStart = map[i];
2436 mEnd = map[i + 1];
2437 if (ch < mStart) {
2438 start = 0; end = 1;
2439 collapse = "left";
2440 } else if (ch < mEnd) {
2441 start = ch - mStart;
2442 end = start + 1;
2443 } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) {
2444 end = mEnd - mStart;
2445 start = end - 1;
2446 if (ch >= mEnd) { collapse = "right"; }
2447 }
2448 if (start != null) {
2449 node = map[i + 2];
2450 if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right"))
2451 { collapse = bias; }
2452 if (bias == "left" && start == 0)
2453 { while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) {
2454 node = map[(i -= 3) + 2];
2455 collapse = "left";
2456 } }
2457 if (bias == "right" && start == mEnd - mStart)
2458 { while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) {
2459 node = map[(i += 3) + 2];
2460 collapse = "right";
2461 } }
2462 break
2463 }
2464 }
2465 return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}
2466 }
2467
2468 function getUsefulRect(rects, bias) {
2469 var rect = nullRect;
2470 if (bias == "left") { for (var i = 0; i < rects.length; i++) {
2471 if ((rect = rects[i]).left != rect.right) { break }
2472 } } else { for (var i$1 = rects.length - 1; i$1 >= 0; i$1--) {
2473 if ((rect = rects[i$1]).left != rect.right) { break }
2474 } }
2475 return rect
2476 }
2477
2478 function measureCharInner(cm, prepared, ch, bias) {
2479 var place = nodeAndOffsetInLineMap(prepared.map, ch, bias);
2480 var node = place.node, start = place.start, end = place.end, collapse = place.collapse;
2481
2482 var rect;
2483 if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates.
2484 for (var i$1 = 0; i$1 < 4; i$1++) { // Retry a maximum of 4 times when nonsense rectangles are returned
2485 while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) { --start; }
2486 while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) { ++end; }
2487 if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart)
2488 { rect = node.parentNode.getBoundingClientRect(); }
2489 else
2490 { rect = getUsefulRect(range(node, start, end).getClientRects(), bias); }
2491 if (rect.left || rect.right || start == 0) { break }
2492 end = start;
2493 start = start - 1;
2494 collapse = "right";
2495 }
2496 if (ie && ie_version < 11) { rect = maybeUpdateRectForZooming(cm.display.measure, rect); }
2497 } else { // If it is a widget, simply get the box for the whole widget.
2498 if (start > 0) { collapse = bias = "right"; }
2499 var rects;
2500 if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1)
2501 { rect = rects[bias == "right" ? rects.length - 1 : 0]; }
2502 else
2503 { rect = node.getBoundingClientRect(); }
2504 }
2505 if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) {
2506 var rSpan = node.parentNode.getClientRects()[0];
2507 if (rSpan)
2508 { rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; }
2509 else
2510 { rect = nullRect; }
2511 }
2512
2513 var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top;
2514 var mid = (rtop + rbot) / 2;
2515 var heights = prepared.view.measure.heights;
2516 var i = 0;
2517 for (; i < heights.length - 1; i++)
2518 { if (mid < heights[i]) { break } }
2519 var top = i ? heights[i - 1] : 0, bot = heights[i];
2520 var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left,
2521 right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left,
2522 top: top, bottom: bot};
2523 if (!rect.left && !rect.right) { result.bogus = true; }
2524 if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; }
2525
2526 return result
2527 }
2528
2529 // Work around problem with bounding client rects on ranges being
2530 // returned incorrectly when zoomed on IE10 and below.
2531 function maybeUpdateRectForZooming(measure, rect) {
2532 if (!window.screen || screen.logicalXDPI == null ||
2533 screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure))
2534 { return rect }
2535 var scaleX = screen.logicalXDPI / screen.deviceXDPI;
2536 var scaleY = screen.logicalYDPI / screen.deviceYDPI;
2537 return {left: rect.left * scaleX, right: rect.right * scaleX,
2538 top: rect.top * scaleY, bottom: rect.bottom * scaleY}
2539 }
2540
2541 function clearLineMeasurementCacheFor(lineView) {
2542 if (lineView.measure) {
2543 lineView.measure.cache = {};
2544 lineView.measure.heights = null;
2545 if (lineView.rest) { for (var i = 0; i < lineView.rest.length; i++)
2546 { lineView.measure.caches[i] = {}; } }
2547 }
2548 }
2549
2550 function clearLineMeasurementCache(cm) {
2551 cm.display.externalMeasure = null;
2552 removeChildren(cm.display.lineMeasure);
2553 for (var i = 0; i < cm.display.view.length; i++)
2554 { clearLineMeasurementCacheFor(cm.display.view[i]); }
2555 }
2556
2557 function clearCaches(cm) {
2558 clearLineMeasurementCache(cm);
2559 cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null;
2560 if (!cm.options.lineWrapping) { cm.display.maxLineChanged = true; }
2561 cm.display.lineNumChars = null;
2562 }
2563
2564 function pageScrollX() {
2565 // Work around https://bugs.chromium.org/p/chromium/issues/detail?id=489206
2566 // which causes page_Offset and bounding client rects to use
2567 // different reference viewports and invalidate our calculations.
2568 if (chrome && android) { return -(document.body.getBoundingClientRect().left - parseInt(getComputedStyle(document.body).marginLeft)) }
2569 return window.pageXOffset || (document.documentElement || document.body).scrollLeft
2570 }
2571 function pageScrollY() {
2572 if (chrome && android) { return -(document.body.getBoundingClientRect().top - parseInt(getComputedStyle(document.body).marginTop)) }
2573 return window.pageYOffset || (document.documentElement || document.body).scrollTop
2574 }
2575
2576 function widgetTopHeight(lineObj) {
2577 var height = 0;
2578 if (lineObj.widgets) { for (var i = 0; i < lineObj.widgets.length; ++i) { if (lineObj.widgets[i].above)
2579 { height += widgetHeight(lineObj.widgets[i]); } } }
2580 return height
2581 }
2582
2583 // Converts a {top, bottom, left, right} box from line-local
2584 // coordinates into another coordinate system. Context may be one of
2585 // "line", "div" (display.lineDiv), "local"./null (editor), "window",
2586 // or "page".
2587 function intoCoordSystem(cm, lineObj, rect, context, includeWidgets) {
2588 if (!includeWidgets) {
2589 var height = widgetTopHeight(lineObj);
2590 rect.top += height; rect.bottom += height;
2591 }
2592 if (context == "line") { return rect }
2593 if (!context) { context = "local"; }
2594 var yOff = heightAtLine(lineObj);
2595 if (context == "local") { yOff += paddingTop(cm.display); }
2596 else { yOff -= cm.display.viewOffset; }
2597 if (context == "page" || context == "window") {
2598 var lOff = cm.display.lineSpace.getBoundingClientRect();
2599 yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
2600 var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
2601 rect.left += xOff; rect.right += xOff;
2602 }
2603 rect.top += yOff; rect.bottom += yOff;
2604 return rect
2605 }
2606
2607 // Coverts a box from "div" coords to another coordinate system.
2608 // Context may be "window", "page", "div", or "local"./null.
2609 function fromCoordSystem(cm, coords, context) {
2610 if (context == "div") { return coords }
2611 var left = coords.left, top = coords.top;
2612 // First move into "page" coordinate system
2613 if (context == "page") {
2614 left -= pageScrollX();
2615 top -= pageScrollY();
2616 } else if (context == "local" || !context) {
2617 var localBox = cm.display.sizer.getBoundingClientRect();
2618 left += localBox.left;
2619 top += localBox.top;
2620 }
2621
2622 var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect();
2623 return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}
2624 }
2625
2626 function charCoords(cm, pos, context, lineObj, bias) {
2627 if (!lineObj) { lineObj = getLine(cm.doc, pos.line); }
2628 return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context)
2629 }
2630
2631 // Returns a box for a given cursor position, which may have an
2632 // 'other' property containing the position of the secondary cursor
2633 // on a bidi boundary.
2634 // A cursor Pos(line, char, "before") is on the same visual line as `char - 1`
2635 // and after `char - 1` in writing order of `char - 1`
2636 // A cursor Pos(line, char, "after") is on the same visual line as `char`
2637 // and before `char` in writing order of `char`
2638 // Examples (upper-case letters are RTL, lower-case are LTR):
2639 // Pos(0, 1, ...)
2640 // before after
2641 // ab a|b a|b
2642 // aB a|B aB|
2643 // Ab |Ab A|b
2644 // AB B|A B|A
2645 // Every position after the last character on a line is considered to stick
2646 // to the last character on the line.
2647 function cursorCoords(cm, pos, context, lineObj, preparedMeasure, varHeight) {
2648 lineObj = lineObj || getLine(cm.doc, pos.line);
2649 if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
2650 function get(ch, right) {
2651 var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight);
2652 if (right) { m.left = m.right; } else { m.right = m.left; }
2653 return intoCoordSystem(cm, lineObj, m, context)
2654 }
2655 var order = getOrder(lineObj, cm.doc.direction), ch = pos.ch, sticky = pos.sticky;
2656 if (ch >= lineObj.text.length) {
2657 ch = lineObj.text.length;
2658 sticky = "before";
2659 } else if (ch <= 0) {
2660 ch = 0;
2661 sticky = "after";
2662 }
2663 if (!order) { return get(sticky == "before" ? ch - 1 : ch, sticky == "before") }
2664
2665 function getBidi(ch, partPos, invert) {
2666 var part = order[partPos], right = part.level == 1;
2667 return get(invert ? ch - 1 : ch, right != invert)
2668 }
2669 var partPos = getBidiPartAt(order, ch, sticky);
2670 var other = bidiOther;
2671 var val = getBidi(ch, partPos, sticky == "before");
2672 if (other != null) { val.other = getBidi(ch, other, sticky != "before"); }
2673 return val
2674 }
2675
2676 // Used to cheaply estimate the coordinates for a position. Used for
2677 // intermediate scroll updates.
2678 function estimateCoords(cm, pos) {
2679 var left = 0;
2680 pos = clipPos(cm.doc, pos);
2681 if (!cm.options.lineWrapping) { left = charWidth(cm.display) * pos.ch; }
2682 var lineObj = getLine(cm.doc, pos.line);
2683 var top = heightAtLine(lineObj) + paddingTop(cm.display);
2684 return {left: left, right: left, top: top, bottom: top + lineObj.height}
2685 }
2686
2687 // Positions returned by coordsChar contain some extra information.
2688 // xRel is the relative x position of the input coordinates compared
2689 // to the found position (so xRel > 0 means the coordinates are to
2690 // the right of the character position, for example). When outside
2691 // is true, that means the coordinates lie outside the line's
2692 // vertical range.
2693 function PosWithInfo(line, ch, sticky, outside, xRel) {
2694 var pos = Pos(line, ch, sticky);
2695 pos.xRel = xRel;
2696 if (outside) { pos.outside = outside; }
2697 return pos
2698 }
2699
2700 // Compute the character position closest to the given coordinates.
2701 // Input must be lineSpace-local ("div" coordinate system).
2702 function coordsChar(cm, x, y) {
2703 var doc = cm.doc;
2704 y += cm.display.viewOffset;
2705 if (y < 0) { return PosWithInfo(doc.first, 0, null, -1, -1) }
2706 var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
2707 if (lineN > last)
2708 { return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, null, 1, 1) }
2709 if (x < 0) { x = 0; }
2710
2711 var lineObj = getLine(doc, lineN);
2712 for (;;) {
2713 var found = coordsCharInner(cm, lineObj, lineN, x, y);
2714 var collapsed = collapsedSpanAround(lineObj, found.ch + (found.xRel > 0 || found.outside > 0 ? 1 : 0));
2715 if (!collapsed) { return found }
2716 var rangeEnd = collapsed.find(1);
2717 if (rangeEnd.line == lineN) { return rangeEnd }
2718 lineObj = getLine(doc, lineN = rangeEnd.line);
2719 }
2720 }
2721
2722 function wrappedLineExtent(cm, lineObj, preparedMeasure, y) {
2723 y -= widgetTopHeight(lineObj);
2724 var end = lineObj.text.length;
2725 var begin = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch - 1).bottom <= y; }, end, 0);
2726 end = findFirst(function (ch) { return measureCharPrepared(cm, preparedMeasure, ch).top > y; }, begin, end);
2727 return {begin: begin, end: end}
2728 }
2729
2730 function wrappedLineExtentChar(cm, lineObj, preparedMeasure, target) {
2731 if (!preparedMeasure) { preparedMeasure = prepareMeasureForLine(cm, lineObj); }
2732 var targetTop = intoCoordSystem(cm, lineObj, measureCharPrepared(cm, preparedMeasure, target), "line").top;
2733 return wrappedLineExtent(cm, lineObj, preparedMeasure, targetTop)
2734 }
2735
2736 // Returns true if the given side of a box is after the given
2737 // coordinates, in top-to-bottom, left-to-right order.
2738 function boxIsAfter(box, x, y, left) {
2739 return box.bottom <= y ? false : box.top > y ? true : (left ? box.left : box.right) > x
2740 }
2741
2742 function coordsCharInner(cm, lineObj, lineNo, x, y) {
2743 // Move y into line-local coordinate space
2744 y -= heightAtLine(lineObj);
2745 var preparedMeasure = prepareMeasureForLine(cm, lineObj);
2746 // When directly calling `measureCharPrepared`, we have to adjust
2747 // for the widgets at this line.
2748 var widgetHeight = widgetTopHeight(lineObj);
2749 var begin = 0, end = lineObj.text.length, ltr = true;
2750
2751 var order = getOrder(lineObj, cm.doc.direction);
2752 // If the line isn't plain left-to-right text, first figure out
2753 // which bidi section the coordinates fall into.
2754 if (order) {
2755 var part = (cm.options.lineWrapping ? coordsBidiPartWrapped : coordsBidiPart)
2756 (cm, lineObj, lineNo, preparedMeasure, order, x, y);
2757 ltr = part.level != 1;
2758 // The awkward -1 offsets are needed because findFirst (called
2759 // on these below) will treat its first bound as inclusive,
2760 // second as exclusive, but we want to actually address the
2761 // characters in the part's range
2762 begin = ltr ? part.from : part.to - 1;
2763 end = ltr ? part.to : part.from - 1;
2764 }
2765
2766 // A binary search to find the first character whose bounding box
2767 // starts after the coordinates. If we run across any whose box wrap
2768 // the coordinates, store that.
2769 var chAround = null, boxAround = null;
2770 var ch = findFirst(function (ch) {
2771 var box = measureCharPrepared(cm, preparedMeasure, ch);
2772 box.top += widgetHeight; box.bottom += widgetHeight;
2773 if (!boxIsAfter(box, x, y, false)) { return false }
2774 if (box.top <= y && box.left <= x) {
2775 chAround = ch;
2776 boxAround = box;
2777 }
2778 return true
2779 }, begin, end);
2780
2781 var baseX, sticky, outside = false;
2782 // If a box around the coordinates was found, use that
2783 if (boxAround) {
2784 // Distinguish coordinates nearer to the left or right side of the box
2785 var atLeft = x - boxAround.left < boxAround.right - x, atStart = atLeft == ltr;
2786 ch = chAround + (atStart ? 0 : 1);
2787 sticky = atStart ? "after" : "before";
2788 baseX = atLeft ? boxAround.left : boxAround.right;
2789 } else {
2790 // (Adjust for extended bound, if necessary.)
2791 if (!ltr && (ch == end || ch == begin)) { ch++; }
2792 // To determine which side to associate with, get the box to the
2793 // left of the character and compare it's vertical position to the
2794 // coordinates
2795 sticky = ch == 0 ? "after" : ch == lineObj.text.length ? "before" :
2796 (measureCharPrepared(cm, preparedMeasure, ch - (ltr ? 1 : 0)).bottom + widgetHeight <= y) == ltr ?
2797 "after" : "before";
2798 // Now get accurate coordinates for this place, in order to get a
2799 // base X position
2800 var coords = cursorCoords(cm, Pos(lineNo, ch, sticky), "line", lineObj, preparedMeasure);
2801 baseX = coords.left;
2802 outside = y < coords.top ? -1 : y >= coords.bottom ? 1 : 0;
2803 }
2804
2805 ch = skipExtendingChars(lineObj.text, ch, 1);
2806 return PosWithInfo(lineNo, ch, sticky, outside, x - baseX)
2807 }
2808
2809 function coordsBidiPart(cm, lineObj, lineNo, preparedMeasure, order, x, y) {
2810 // Bidi parts are sorted left-to-right, and in a non-line-wrapping
2811 // situation, we can take this ordering to correspond to the visual
2812 // ordering. This finds the first part whose end is after the given
2813 // coordinates.
2814 var index = findFirst(function (i) {
2815 var part = order[i], ltr = part.level != 1;
2816 return boxIsAfter(cursorCoords(cm, Pos(lineNo, ltr ? part.to : part.from, ltr ? "before" : "after"),
2817 "line", lineObj, preparedMeasure), x, y, true)
2818 }, 0, order.length - 1);
2819 var part = order[index];
2820 // If this isn't the first part, the part's start is also after
2821 // the coordinates, and the coordinates aren't on the same line as
2822 // that start, move one part back.
2823 if (index > 0) {
2824 var ltr = part.level != 1;
2825 var start = cursorCoords(cm, Pos(lineNo, ltr ? part.from : part.to, ltr ? "after" : "before"),
2826 "line", lineObj, preparedMeasure);
2827 if (boxIsAfter(start, x, y, true) && start.top > y)
2828 { part = order[index - 1]; }
2829 }
2830 return part
2831 }
2832
2833 function coordsBidiPartWrapped(cm, lineObj, _lineNo, preparedMeasure, order, x, y) {
2834 // In a wrapped line, rtl text on wrapping boundaries can do things
2835 // that don't correspond to the ordering in our `order` array at
2836 // all, so a binary search doesn't work, and we want to return a
2837 // part that only spans one line so that the binary search in
2838 // coordsCharInner is safe. As such, we first find the extent of the
2839 // wrapped line, and then do a flat search in which we discard any
2840 // spans that aren't on the line.
2841 var ref = wrappedLineExtent(cm, lineObj, preparedMeasure, y);
2842 var begin = ref.begin;
2843 var end = ref.end;
2844 if (/\s/.test(lineObj.text.charAt(end - 1))) { end--; }
2845 var part = null, closestDist = null;
2846 for (var i = 0; i < order.length; i++) {
2847 var p = order[i];
2848 if (p.from >= end || p.to <= begin) { continue }
2849 var ltr = p.level != 1;
2850 var endX = measureCharPrepared(cm, preparedMeasure, ltr ? Math.min(end, p.to) - 1 : Math.max(begin, p.from)).right;
2851 // Weigh against spans ending before this, so that they are only
2852 // picked if nothing ends after
2853 var dist = endX < x ? x - endX + 1e9 : endX - x;
2854 if (!part || closestDist > dist) {
2855 part = p;
2856 closestDist = dist;
2857 }
2858 }
2859 if (!part) { part = order[order.length - 1]; }
2860 // Clip the part to the wrapped line.
2861 if (part.from < begin) { part = {from: begin, to: part.to, level: part.level}; }
2862 if (part.to > end) { part = {from: part.from, to: end, level: part.level}; }
2863 return part
2864 }
2865
2866 var measureText;
2867 // Compute the default text height.
2868 function textHeight(display) {
2869 if (display.cachedTextHeight != null) { return display.cachedTextHeight }
2870 if (measureText == null) {
2871 measureText = elt("pre", null, "CodeMirror-line-like");
2872 // Measure a bunch of lines, for browsers that compute
2873 // fractional heights.
2874 for (var i = 0; i < 49; ++i) {
2875 measureText.appendChild(document.createTextNode("x"));
2876 measureText.appendChild(elt("br"));
2877 }
2878 measureText.appendChild(document.createTextNode("x"));
2879 }
2880 removeChildrenAndAdd(display.measure, measureText);
2881 var height = measureText.offsetHeight / 50;
2882 if (height > 3) { display.cachedTextHeight = height; }
2883 removeChildren(display.measure);
2884 return height || 1
2885 }
2886
2887 // Compute the default character width.
2888 function charWidth(display) {
2889 if (display.cachedCharWidth != null) { return display.cachedCharWidth }
2890 var anchor = elt("span", "xxxxxxxxxx");
2891 var pre = elt("pre", [anchor], "CodeMirror-line-like");
2892 removeChildrenAndAdd(display.measure, pre);
2893 var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10;
2894 if (width > 2) { display.cachedCharWidth = width; }
2895 return width || 10
2896 }
2897
2898 // Do a bulk-read of the DOM positions and sizes needed to draw the
2899 // view, so that we don't interleave reading and writing to the DOM.
2900 function getDimensions(cm) {
2901 var d = cm.display, left = {}, width = {};
2902 var gutterLeft = d.gutters.clientLeft;
2903 for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
2904 var id = cm.display.gutterSpecs[i].className;
2905 left[id] = n.offsetLeft + n.clientLeft + gutterLeft;
2906 width[id] = n.clientWidth;
2907 }
2908 return {fixedPos: compensateForHScroll(d),
2909 gutterTotalWidth: d.gutters.offsetWidth,
2910 gutterLeft: left,
2911 gutterWidth: width,
2912 wrapperWidth: d.wrapper.clientWidth}
2913 }
2914
2915 // Computes display.scroller.scrollLeft + display.gutters.offsetWidth,
2916 // but using getBoundingClientRect to get a sub-pixel-accurate
2917 // result.
2918 function compensateForHScroll(display) {
2919 return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left
2920 }
2921
2922 // Returns a function that estimates the height of a line, to use as
2923 // first approximation until the line becomes visible (and is thus
2924 // properly measurable).
2925 function estimateHeight(cm) {
2926 var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
2927 var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
2928 return function (line) {
2929 if (lineIsHidden(cm.doc, line)) { return 0 }
2930
2931 var widgetsHeight = 0;
2932 if (line.widgets) { for (var i = 0; i < line.widgets.length; i++) {
2933 if (line.widgets[i].height) { widgetsHeight += line.widgets[i].height; }
2934 } }
2935
2936 if (wrapping)
2937 { return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th }
2938 else
2939 { return widgetsHeight + th }
2940 }
2941 }
2942
2943 function estimateLineHeights(cm) {
2944 var doc = cm.doc, est = estimateHeight(cm);
2945 doc.iter(function (line) {
2946 var estHeight = est(line);
2947 if (estHeight != line.height) { updateLineHeight(line, estHeight); }
2948 });
2949 }
2950
2951 // Given a mouse event, find the corresponding position. If liberal
2952 // is false, it checks whether a gutter or scrollbar was clicked,
2953 // and returns null if it was. forRect is used by rectangular
2954 // selections, and tries to estimate a character position even for
2955 // coordinates beyond the right of the text.
2956 function posFromMouse(cm, e, liberal, forRect) {
2957 var display = cm.display;
2958 if (!liberal && e_target(e).getAttribute("cm-not-content") == "true") { return null }
2959
2960 var x, y, space = display.lineSpace.getBoundingClientRect();
2961 // Fails unpredictably on IE[67] when mouse is dragged around quickly.
2962 try { x = e.clientX - space.left; y = e.clientY - space.top; }
2963 catch (e$1) { return null }
2964 var coords = coordsChar(cm, x, y), line;
2965 if (forRect && coords.xRel > 0 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) {
2966 var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length;
2967 coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff));
2968 }
2969 return coords
2970 }
2971
2972 // Find the view element corresponding to a given line. Return null
2973 // when the line isn't visible.
2974 function findViewIndex(cm, n) {
2975 if (n >= cm.display.viewTo) { return null }
2976 n -= cm.display.viewFrom;
2977 if (n < 0) { return null }
2978 var view = cm.display.view;
2979 for (var i = 0; i < view.length; i++) {
2980 n -= view[i].size;
2981 if (n < 0) { return i }
2982 }
2983 }
2984
2985 // Updates the display.view data structure for a given change to the
2986 // document. From and to are in pre-change coordinates. Lendiff is
2987 // the amount of lines added or subtracted by the change. This is
2988 // used for changes that span multiple lines, or change the way
2989 // lines are divided into visual lines. regLineChange (below)
2990 // registers single-line changes.
2991 function regChange(cm, from, to, lendiff) {
2992 if (from == null) { from = cm.doc.first; }
2993 if (to == null) { to = cm.doc.first + cm.doc.size; }
2994 if (!lendiff) { lendiff = 0; }
2995
2996 var display = cm.display;
2997 if (lendiff && to < display.viewTo &&
2998 (display.updateLineNumbers == null || display.updateLineNumbers > from))
2999 { display.updateLineNumbers = from; }
3000
3001 cm.curOp.viewChanged = true;
3002
3003 if (from >= display.viewTo) { // Change after
3004 if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo)
3005 { resetView(cm); }
3006 } else if (to <= display.viewFrom) { // Change before
3007 if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) {
3008 resetView(cm);
3009 } else {
3010 display.viewFrom += lendiff;
3011 display.viewTo += lendiff;
3012 }
3013 } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap
3014 resetView(cm);
3015 } else if (from <= display.viewFrom) { // Top overlap
3016 var cut = viewCuttingPoint(cm, to, to + lendiff, 1);
3017 if (cut) {
3018 display.view = display.view.slice(cut.index);
3019 display.viewFrom = cut.lineN;
3020 display.viewTo += lendiff;
3021 } else {
3022 resetView(cm);
3023 }
3024 } else if (to >= display.viewTo) { // Bottom overlap
3025 var cut$1 = viewCuttingPoint(cm, from, from, -1);
3026 if (cut$1) {
3027 display.view = display.view.slice(0, cut$1.index);
3028 display.viewTo = cut$1.lineN;
3029 } else {
3030 resetView(cm);
3031 }
3032 } else { // Gap in the middle
3033 var cutTop = viewCuttingPoint(cm, from, from, -1);
3034 var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1);
3035 if (cutTop && cutBot) {
3036 display.view = display.view.slice(0, cutTop.index)
3037 .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN))
3038 .concat(display.view.slice(cutBot.index));
3039 display.viewTo += lendiff;
3040 } else {
3041 resetView(cm);
3042 }
3043 }
3044
3045 var ext = display.externalMeasured;
3046 if (ext) {
3047 if (to < ext.lineN)
3048 { ext.lineN += lendiff; }
3049 else if (from < ext.lineN + ext.size)
3050 { display.externalMeasured = null; }
3051 }
3052 }
3053
3054 // Register a change to a single line. Type must be one of "text",
3055 // "gutter", "class", "widget"
3056 function regLineChange(cm, line, type) {
3057 cm.curOp.viewChanged = true;
3058 var display = cm.display, ext = cm.display.externalMeasured;
3059 if (ext && line >= ext.lineN && line < ext.lineN + ext.size)
3060 { display.externalMeasured = null; }
3061
3062 if (line < display.viewFrom || line >= display.viewTo) { return }
3063 var lineView = display.view[findViewIndex(cm, line)];
3064 if (lineView.node == null) { return }
3065 var arr = lineView.changes || (lineView.changes = []);
3066 if (indexOf(arr, type) == -1) { arr.push(type); }
3067 }
3068
3069 // Clear the view.
3070 function resetView(cm) {
3071 cm.display.viewFrom = cm.display.viewTo = cm.doc.first;
3072 cm.display.view = [];
3073 cm.display.viewOffset = 0;
3074 }
3075
3076 function viewCuttingPoint(cm, oldN, newN, dir) {
3077 var index = findViewIndex(cm, oldN), diff, view = cm.display.view;
3078 if (!sawCollapsedSpans || newN == cm.doc.first + cm.doc.size)
3079 { return {index: index, lineN: newN} }
3080 var n = cm.display.viewFrom;
3081 for (var i = 0; i < index; i++)
3082 { n += view[i].size; }
3083 if (n != oldN) {
3084 if (dir > 0) {
3085 if (index == view.length - 1) { return null }
3086 diff = (n + view[index].size) - oldN;
3087 index++;
3088 } else {
3089 diff = n - oldN;
3090 }
3091 oldN += diff; newN += diff;
3092 }
3093 while (visualLineNo(cm.doc, newN) != newN) {
3094 if (index == (dir < 0 ? 0 : view.length - 1)) { return null }
3095 newN += dir * view[index - (dir < 0 ? 1 : 0)].size;
3096 index += dir;
3097 }
3098 return {index: index, lineN: newN}
3099 }
3100
3101 // Force the view to cover a given range, adding empty view element
3102 // or clipping off existing ones as needed.
3103 function adjustView(cm, from, to) {
3104 var display = cm.display, view = display.view;
3105 if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) {
3106 display.view = buildViewArray(cm, from, to);
3107 display.viewFrom = from;
3108 } else {
3109 if (display.viewFrom > from)
3110 { display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); }
3111 else if (display.viewFrom < from)
3112 { display.view = display.view.slice(findViewIndex(cm, from)); }
3113 display.viewFrom = from;
3114 if (display.viewTo < to)
3115 { display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); }
3116 else if (display.viewTo > to)
3117 { display.view = display.view.slice(0, findViewIndex(cm, to)); }
3118 }
3119 display.viewTo = to;
3120 }
3121
3122 // Count the number of lines in the view whose DOM representation is
3123 // out of date (or nonexistent).
3124 function countDirtyView(cm) {
3125 var view = cm.display.view, dirty = 0;
3126 for (var i = 0; i < view.length; i++) {
3127 var lineView = view[i];
3128 if (!lineView.hidden && (!lineView.node || lineView.changes)) { ++dirty; }
3129 }
3130 return dirty
3131 }
3132
3133 function updateSelection(cm) {
3134 cm.display.input.showSelection(cm.display.input.prepareSelection());
3135 }
3136
3137 function prepareSelection(cm, primary) {
3138 if ( primary === void 0 ) primary = true;
3139
3140 var doc = cm.doc, result = {};
3141 var curFragment = result.cursors = document.createDocumentFragment();
3142 var selFragment = result.selection = document.createDocumentFragment();
3143
3144 for (var i = 0; i < doc.sel.ranges.length; i++) {
3145 if (!primary && i == doc.sel.primIndex) { continue }
3146 var range = doc.sel.ranges[i];
3147 if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) { continue }
3148 var collapsed = range.empty();
3149 if (collapsed || cm.options.showCursorWhenSelecting)
3150 { drawSelectionCursor(cm, range.head, curFragment); }
3151 if (!collapsed)
3152 { drawSelectionRange(cm, range, selFragment); }
3153 }
3154 return result
3155 }
3156
3157 // Draws a cursor for the given range
3158 function drawSelectionCursor(cm, head, output) {
3159 var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine);
3160
3161 var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor"));
3162 cursor.style.left = pos.left + "px";
3163 cursor.style.top = pos.top + "px";
3164 cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
3165
3166 if (pos.other) {
3167 // Secondary cursor, shown when on a 'jump' in bi-directional text
3168 var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor"));
3169 otherCursor.style.display = "";
3170 otherCursor.style.left = pos.other.left + "px";
3171 otherCursor.style.top = pos.other.top + "px";
3172 otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
3173 }
3174 }
3175
3176 function cmpCoords(a, b) { return a.top - b.top || a.left - b.left }
3177
3178 // Draws the given range as a highlighted selection
3179 function drawSelectionRange(cm, range, output) {
3180 var display = cm.display, doc = cm.doc;
3181 var fragment = document.createDocumentFragment();
3182 var padding = paddingH(cm.display), leftSide = padding.left;
3183 var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - padding.right;
3184 var docLTR = doc.direction == "ltr";
3185
3186 function add(left, top, width, bottom) {
3187 if (top < 0) { top = 0; }
3188 top = Math.round(top);
3189 bottom = Math.round(bottom);
3190 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")));
3191 }
3192
3193 function drawForLine(line, fromArg, toArg) {
3194 var lineObj = getLine(doc, line);
3195 var lineLen = lineObj.text.length;
3196 var start, end;
3197 function coords(ch, bias) {
3198 return charCoords(cm, Pos(line, ch), "div", lineObj, bias)
3199 }
3200
3201 function wrapX(pos, dir, side) {
3202 var extent = wrappedLineExtentChar(cm, lineObj, null, pos);
3203 var prop = (dir == "ltr") == (side == "after") ? "left" : "right";
3204 var ch = side == "after" ? extent.begin : extent.end - (/\s/.test(lineObj.text.charAt(extent.end - 1)) ? 2 : 1);
3205 return coords(ch, prop)[prop]
3206 }
3207
3208 var order = getOrder(lineObj, doc.direction);
3209 iterateBidiSections(order, fromArg || 0, toArg == null ? lineLen : toArg, function (from, to, dir, i) {
3210 var ltr = dir == "ltr";
3211 var fromPos = coords(from, ltr ? "left" : "right");
3212 var toPos = coords(to - 1, ltr ? "right" : "left");
3213
3214 var openStart = fromArg == null && from == 0, openEnd = toArg == null && to == lineLen;
3215 var first = i == 0, last = !order || i == order.length - 1;
3216 if (toPos.top - fromPos.top <= 3) { // Single line
3217 var openLeft = (docLTR ? openStart : openEnd) && first;
3218 var openRight = (docLTR ? openEnd : openStart) && last;
3219 var left = openLeft ? leftSide : (ltr ? fromPos : toPos).left;
3220 var right = openRight ? rightSide : (ltr ? toPos : fromPos).right;
3221 add(left, fromPos.top, right - left, fromPos.bottom);
3222 } else { // Multiple lines
3223 var topLeft, topRight, botLeft, botRight;
3224 if (ltr) {
3225 topLeft = docLTR && openStart && first ? leftSide : fromPos.left;
3226 topRight = docLTR ? rightSide : wrapX(from, dir, "before");
3227 botLeft = docLTR ? leftSide : wrapX(to, dir, "after");
3228 botRight = docLTR && openEnd && last ? rightSide : toPos.right;
3229 } else {
3230 topLeft = !docLTR ? leftSide : wrapX(from, dir, "before");
3231 topRight = !docLTR && openStart && first ? rightSide : fromPos.right;
3232 botLeft = !docLTR && openEnd && last ? leftSide : toPos.left;
3233 botRight = !docLTR ? rightSide : wrapX(to, dir, "after");
3234 }
3235 add(topLeft, fromPos.top, topRight - topLeft, fromPos.bottom);
3236 if (fromPos.bottom < toPos.top) { add(leftSide, fromPos.bottom, null, toPos.top); }
3237 add(botLeft, toPos.top, botRight - botLeft, toPos.bottom);
3238 }
3239
3240 if (!start || cmpCoords(fromPos, start) < 0) { start = fromPos; }
3241 if (cmpCoords(toPos, start) < 0) { start = toPos; }
3242 if (!end || cmpCoords(fromPos, end) < 0) { end = fromPos; }
3243 if (cmpCoords(toPos, end) < 0) { end = toPos; }
3244 });
3245 return {start: start, end: end}
3246 }
3247
3248 var sFrom = range.from(), sTo = range.to();
3249 if (sFrom.line == sTo.line) {
3250 drawForLine(sFrom.line, sFrom.ch, sTo.ch);
3251 } else {
3252 var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line);
3253 var singleVLine = visualLine(fromLine) == visualLine(toLine);
3254 var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end;
3255 var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start;
3256 if (singleVLine) {
3257 if (leftEnd.top < rightStart.top - 2) {
3258 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
3259 add(leftSide, rightStart.top, rightStart.left, rightStart.bottom);
3260 } else {
3261 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
3262 }
3263 }
3264 if (leftEnd.bottom < rightStart.top)
3265 { add(leftSide, leftEnd.bottom, null, rightStart.top); }
3266 }
3267
3268 output.appendChild(fragment);
3269 }
3270
3271 // Cursor-blinking
3272 function restartBlink(cm) {
3273 if (!cm.state.focused) { return }
3274 var display = cm.display;
3275 clearInterval(display.blinker);
3276 var on = true;
3277 display.cursorDiv.style.visibility = "";
3278 if (cm.options.cursorBlinkRate > 0)
3279 { display.blinker = setInterval(function () {
3280 if (!cm.hasFocus()) { onBlur(cm); }
3281 display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden";
3282 }, cm.options.cursorBlinkRate); }
3283 else if (cm.options.cursorBlinkRate < 0)
3284 { display.cursorDiv.style.visibility = "hidden"; }
3285 }
3286
3287 function ensureFocus(cm) {
3288 if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); }
3289 }
3290
3291 function delayBlurEvent(cm) {
3292 cm.state.delayingBlurEvent = true;
3293 setTimeout(function () { if (cm.state.delayingBlurEvent) {
3294 cm.state.delayingBlurEvent = false;
3295 onBlur(cm);
3296 } }, 100);
3297 }
3298
3299 function onFocus(cm, e) {
3300 if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; }
3301
3302 if (cm.options.readOnly == "nocursor") { return }
3303 if (!cm.state.focused) {
3304 signal(cm, "focus", cm, e);
3305 cm.state.focused = true;
3306 addClass(cm.display.wrapper, "CodeMirror-focused");
3307 // This test prevents this from firing when a context
3308 // menu is closed (since the input reset would kill the
3309 // select-all detection hack)
3310 if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) {
3311 cm.display.input.reset();
3312 if (webkit) { setTimeout(function () { return cm.display.input.reset(true); }, 20); } // Issue #1730
3313 }
3314 cm.display.input.receivedFocus();
3315 }
3316 restartBlink(cm);
3317 }
3318 function onBlur(cm, e) {
3319 if (cm.state.delayingBlurEvent) { return }
3320
3321 if (cm.state.focused) {
3322 signal(cm, "blur", cm, e);
3323 cm.state.focused = false;
3324 rmClass(cm.display.wrapper, "CodeMirror-focused");
3325 }
3326 clearInterval(cm.display.blinker);
3327 setTimeout(function () { if (!cm.state.focused) { cm.display.shift = false; } }, 150);
3328 }
3329
3330 // Read the actual heights of the rendered lines, and update their
3331 // stored heights to match.
3332 function updateHeightsInViewport(cm) {
3333 var display = cm.display;
3334 var prevBottom = display.lineDiv.offsetTop;
3335 for (var i = 0; i < display.view.length; i++) {
3336 var cur = display.view[i], wrapping = cm.options.lineWrapping;
3337 var height = (void 0), width = 0;
3338 if (cur.hidden) { continue }
3339 if (ie && ie_version < 8) {
3340 var bot = cur.node.offsetTop + cur.node.offsetHeight;
3341 height = bot - prevBottom;
3342 prevBottom = bot;
3343 } else {
3344 var box = cur.node.getBoundingClientRect();
3345 height = box.bottom - box.top;
3346 // Check that lines don't extend past the right of the current
3347 // editor width
3348 if (!wrapping && cur.text.firstChild)
3349 { width = cur.text.firstChild.getBoundingClientRect().right - box.left - 1; }
3350 }
3351 var diff = cur.line.height - height;
3352 if (diff > .005 || diff < -.005) {
3353 updateLineHeight(cur.line, height);
3354 updateWidgetHeight(cur.line);
3355 if (cur.rest) { for (var j = 0; j < cur.rest.length; j++)
3356 { updateWidgetHeight(cur.rest[j]); } }
3357 }
3358 if (width > cm.display.sizerWidth) {
3359 var chWidth = Math.ceil(width / charWidth(cm.display));
3360 if (chWidth > cm.display.maxLineLength) {
3361 cm.display.maxLineLength = chWidth;
3362 cm.display.maxLine = cur.line;
3363 cm.display.maxLineChanged = true;
3364 }
3365 }
3366 }
3367 }
3368
3369 // Read and store the height of line widgets associated with the
3370 // given line.
3371 function updateWidgetHeight(line) {
3372 if (line.widgets) { for (var i = 0; i < line.widgets.length; ++i) {
3373 var w = line.widgets[i], parent = w.node.parentNode;
3374 if (parent) { w.height = parent.offsetHeight; }
3375 } }
3376 }
3377
3378 // Compute the lines that are visible in a given viewport (defaults
3379 // the the current scroll position). viewport may contain top,
3380 // height, and ensure (see op.scrollToPos) properties.
3381 function visibleLines(display, doc, viewport) {
3382 var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop;
3383 top = Math.floor(top - paddingTop(display));
3384 var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight;
3385
3386 var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom);
3387 // Ensure is a {from: {line, ch}, to: {line, ch}} object, and
3388 // forces those lines into the viewport (if possible).
3389 if (viewport && viewport.ensure) {
3390 var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line;
3391 if (ensureFrom < from) {
3392 from = ensureFrom;
3393 to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight);
3394 } else if (Math.min(ensureTo, doc.lastLine()) >= to) {
3395 from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight);
3396 to = ensureTo;
3397 }
3398 }
3399 return {from: from, to: Math.max(to, from + 1)}
3400 }
3401
3402 // SCROLLING THINGS INTO VIEW
3403
3404 // If an editor sits on the top or bottom of the window, partially
3405 // scrolled out of view, this ensures that the cursor is visible.
3406 function maybeScrollWindow(cm, rect) {
3407 if (signalDOMEvent(cm, "scrollCursorIntoView")) { return }
3408
3409 var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
3410 if (rect.top + box.top < 0) { doScroll = true; }
3411 else if (rect.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) { doScroll = false; }
3412 if (doScroll != null && !phantom) {
3413 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;"));
3414 cm.display.lineSpace.appendChild(scrollNode);
3415 scrollNode.scrollIntoView(doScroll);
3416 cm.display.lineSpace.removeChild(scrollNode);
3417 }
3418 }
3419
3420 // Scroll a given position into view (immediately), verifying that
3421 // it actually became visible (as line heights are accurately
3422 // measured, the position of something may 'drift' during drawing).
3423 function scrollPosIntoView(cm, pos, end, margin) {
3424 if (margin == null) { margin = 0; }
3425 var rect;
3426 if (!cm.options.lineWrapping && pos == end) {
3427 // Set pos and end to the cursor positions around the character pos sticks to
3428 // If pos.sticky == "before", that is around pos.ch - 1, otherwise around pos.ch
3429 // If pos == Pos(_, 0, "before"), pos and end are unchanged
3430 pos = pos.ch ? Pos(pos.line, pos.sticky == "before" ? pos.ch - 1 : pos.ch, "after") : pos;
3431 end = pos.sticky == "before" ? Pos(pos.line, pos.ch + 1, "before") : pos;
3432 }
3433 for (var limit = 0; limit < 5; limit++) {
3434 var changed = false;
3435 var coords = cursorCoords(cm, pos);
3436 var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
3437 rect = {left: Math.min(coords.left, endCoords.left),
3438 top: Math.min(coords.top, endCoords.top) - margin,
3439 right: Math.max(coords.left, endCoords.left),
3440 bottom: Math.max(coords.bottom, endCoords.bottom) + margin};
3441 var scrollPos = calculateScrollPos(cm, rect);
3442 var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
3443 if (scrollPos.scrollTop != null) {
3444 updateScrollTop(cm, scrollPos.scrollTop);
3445 if (Math.abs(cm.doc.scrollTop - startTop) > 1) { changed = true; }
3446 }
3447 if (scrollPos.scrollLeft != null) {
3448 setScrollLeft(cm, scrollPos.scrollLeft);
3449 if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) { changed = true; }
3450 }
3451 if (!changed) { break }
3452 }
3453 return rect
3454 }
3455
3456 // Scroll a given set of coordinates into view (immediately).
3457 function scrollIntoView(cm, rect) {
3458 var scrollPos = calculateScrollPos(cm, rect);
3459 if (scrollPos.scrollTop != null) { updateScrollTop(cm, scrollPos.scrollTop); }
3460 if (scrollPos.scrollLeft != null) { setScrollLeft(cm, scrollPos.scrollLeft); }
3461 }
3462
3463 // Calculate a new scroll position needed to scroll the given
3464 // rectangle into view. Returns an object with scrollTop and
3465 // scrollLeft properties. When these are undefined, the
3466 // vertical/horizontal position does not need to be adjusted.
3467 function calculateScrollPos(cm, rect) {
3468 var display = cm.display, snapMargin = textHeight(cm.display);
3469 if (rect.top < 0) { rect.top = 0; }
3470 var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop;
3471 var screen = displayHeight(cm), result = {};
3472 if (rect.bottom - rect.top > screen) { rect.bottom = rect.top + screen; }
3473 var docBottom = cm.doc.height + paddingVert(display);
3474 var atTop = rect.top < snapMargin, atBottom = rect.bottom > docBottom - snapMargin;
3475 if (rect.top < screentop) {
3476 result.scrollTop = atTop ? 0 : rect.top;
3477 } else if (rect.bottom > screentop + screen) {
3478 var newTop = Math.min(rect.top, (atBottom ? docBottom : rect.bottom) - screen);
3479 if (newTop != screentop) { result.scrollTop = newTop; }
3480 }
3481
3482 var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft;
3483 var screenw = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0);
3484 var tooWide = rect.right - rect.left > screenw;
3485 if (tooWide) { rect.right = rect.left + screenw; }
3486 if (rect.left < 10)
3487 { result.scrollLeft = 0; }
3488 else if (rect.left < screenleft)
3489 { result.scrollLeft = Math.max(0, rect.left - (tooWide ? 0 : 10)); }
3490 else if (rect.right > screenw + screenleft - 3)
3491 { result.scrollLeft = rect.right + (tooWide ? 0 : 10) - screenw; }
3492 return result
3493 }
3494
3495 // Store a relative adjustment to the scroll position in the current
3496 // operation (to be applied when the operation finishes).
3497 function addToScrollTop(cm, top) {
3498 if (top == null) { return }
3499 resolveScrollToPos(cm);
3500 cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top;
3501 }
3502
3503 // Make sure that at the end of the operation the current cursor is
3504 // shown.
3505 function ensureCursorVisible(cm) {
3506 resolveScrollToPos(cm);
3507 var cur = cm.getCursor();
3508 cm.curOp.scrollToPos = {from: cur, to: cur, margin: cm.options.cursorScrollMargin};
3509 }
3510
3511 function scrollToCoords(cm, x, y) {
3512 if (x != null || y != null) { resolveScrollToPos(cm); }
3513 if (x != null) { cm.curOp.scrollLeft = x; }
3514 if (y != null) { cm.curOp.scrollTop = y; }
3515 }
3516
3517 function scrollToRange(cm, range) {
3518 resolveScrollToPos(cm);
3519 cm.curOp.scrollToPos = range;
3520 }
3521
3522 // When an operation has its scrollToPos property set, and another
3523 // scroll action is applied before the end of the operation, this
3524 // 'simulates' scrolling that position into view in a cheap way, so
3525 // that the effect of intermediate scroll commands is not ignored.
3526 function resolveScrollToPos(cm) {
3527 var range = cm.curOp.scrollToPos;
3528 if (range) {
3529 cm.curOp.scrollToPos = null;
3530 var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to);
3531 scrollToCoordsRange(cm, from, to, range.margin);
3532 }
3533 }
3534
3535 function scrollToCoordsRange(cm, from, to, margin) {
3536 var sPos = calculateScrollPos(cm, {
3537 left: Math.min(from.left, to.left),
3538 top: Math.min(from.top, to.top) - margin,
3539 right: Math.max(from.right, to.right),
3540 bottom: Math.max(from.bottom, to.bottom) + margin
3541 });
3542 scrollToCoords(cm, sPos.scrollLeft, sPos.scrollTop);
3543 }
3544
3545 // Sync the scrollable area and scrollbars, ensure the viewport
3546 // covers the visible area.
3547 function updateScrollTop(cm, val) {
3548 if (Math.abs(cm.doc.scrollTop - val) < 2) { return }
3549 if (!gecko) { updateDisplaySimple(cm, {top: val}); }
3550 setScrollTop(cm, val, true);
3551 if (gecko) { updateDisplaySimple(cm); }
3552 startWorker(cm, 100);
3553 }
3554
3555 function setScrollTop(cm, val, forceScroll) {
3556 val = Math.max(0, Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight, val));
3557 if (cm.display.scroller.scrollTop == val && !forceScroll) { return }
3558 cm.doc.scrollTop = val;
3559 cm.display.scrollbars.setScrollTop(val);
3560 if (cm.display.scroller.scrollTop != val) { cm.display.scroller.scrollTop = val; }
3561 }
3562
3563 // Sync scroller and scrollbar, ensure the gutter elements are
3564 // aligned.
3565 function setScrollLeft(cm, val, isScroller, forceScroll) {
3566 val = Math.max(0, Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth));
3567 if ((isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) && !forceScroll) { return }
3568 cm.doc.scrollLeft = val;
3569 alignHorizontally(cm);
3570 if (cm.display.scroller.scrollLeft != val) { cm.display.scroller.scrollLeft = val; }
3571 cm.display.scrollbars.setScrollLeft(val);
3572 }
3573
3574 // SCROLLBARS
3575
3576 // Prepare DOM reads needed to update the scrollbars. Done in one
3577 // shot to minimize update/measure roundtrips.
3578 function measureForScrollbars(cm) {
3579 var d = cm.display, gutterW = d.gutters.offsetWidth;
3580 var docH = Math.round(cm.doc.height + paddingVert(cm.display));
3581 return {
3582 clientHeight: d.scroller.clientHeight,
3583 viewHeight: d.wrapper.clientHeight,
3584 scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth,
3585 viewWidth: d.wrapper.clientWidth,
3586 barLeft: cm.options.fixedGutter ? gutterW : 0,
3587 docHeight: docH,
3588 scrollHeight: docH + scrollGap(cm) + d.barHeight,
3589 nativeBarWidth: d.nativeBarWidth,
3590 gutterWidth: gutterW
3591 }
3592 }
3593
3594 var NativeScrollbars = function(place, scroll, cm) {
3595 this.cm = cm;
3596 var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar");
3597 var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar");
3598 vert.tabIndex = horiz.tabIndex = -1;
3599 place(vert); place(horiz);
3600
3601 on(vert, "scroll", function () {
3602 if (vert.clientHeight) { scroll(vert.scrollTop, "vertical"); }
3603 });
3604 on(horiz, "scroll", function () {
3605 if (horiz.clientWidth) { scroll(horiz.scrollLeft, "horizontal"); }
3606 });
3607
3608 this.checkedZeroWidth = false;
3609 // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
3610 if (ie && ie_version < 8) { this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; }
3611 };
3612
3613 NativeScrollbars.prototype.update = function (measure) {
3614 var needsH = measure.scrollWidth > measure.clientWidth + 1;
3615 var needsV = measure.scrollHeight > measure.clientHeight + 1;
3616 var sWidth = measure.nativeBarWidth;
3617
3618 if (needsV) {
3619 this.vert.style.display = "block";
3620 this.vert.style.bottom = needsH ? sWidth + "px" : "0";
3621 var totalHeight = measure.viewHeight - (needsH ? sWidth : 0);
3622 // A bug in IE8 can cause this value to be negative, so guard it.
3623 this.vert.firstChild.style.height =
3624 Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px";
3625 } else {
3626 this.vert.style.display = "";
3627 this.vert.firstChild.style.height = "0";
3628 }
3629
3630 if (needsH) {
3631 this.horiz.style.display = "block";
3632 this.horiz.style.right = needsV ? sWidth + "px" : "0";
3633 this.horiz.style.left = measure.barLeft + "px";
3634 var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0);
3635 this.horiz.firstChild.style.width =
3636 Math.max(0, measure.scrollWidth - measure.clientWidth + totalWidth) + "px";
3637 } else {
3638 this.horiz.style.display = "";
3639 this.horiz.firstChild.style.width = "0";
3640 }
3641
3642 if (!this.checkedZeroWidth && measure.clientHeight > 0) {
3643 if (sWidth == 0) { this.zeroWidthHack(); }
3644 this.checkedZeroWidth = true;
3645 }
3646
3647 return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}
3648 };
3649
3650 NativeScrollbars.prototype.setScrollLeft = function (pos) {
3651 if (this.horiz.scrollLeft != pos) { this.horiz.scrollLeft = pos; }
3652 if (this.disableHoriz) { this.enableZeroWidthBar(this.horiz, this.disableHoriz, "horiz"); }
3653 };
3654
3655 NativeScrollbars.prototype.setScrollTop = function (pos) {
3656 if (this.vert.scrollTop != pos) { this.vert.scrollTop = pos; }
3657 if (this.disableVert) { this.enableZeroWidthBar(this.vert, this.disableVert, "vert"); }
3658 };
3659
3660 NativeScrollbars.prototype.zeroWidthHack = function () {
3661 var w = mac && !mac_geMountainLion ? "12px" : "18px";
3662 this.horiz.style.height = this.vert.style.width = w;
3663 this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none";
3664 this.disableHoriz = new Delayed;
3665 this.disableVert = new Delayed;
3666 };
3667
3668 NativeScrollbars.prototype.enableZeroWidthBar = function (bar, delay, type) {
3669 bar.style.pointerEvents = "auto";
3670 function maybeDisable() {
3671 // To find out whether the scrollbar is still visible, we
3672 // check whether the element under the pixel in the bottom
3673 // right corner of the scrollbar box is the scrollbar box
3674 // itself (when the bar is still visible) or its filler child
3675 // (when the bar is hidden). If it is still visible, we keep
3676 // it enabled, if it's hidden, we disable pointer events.
3677 var box = bar.getBoundingClientRect();
3678 var elt = type == "vert" ? document.elementFromPoint(box.right - 1, (box.top + box.bottom) / 2)
3679 : document.elementFromPoint((box.right + box.left) / 2, box.bottom - 1);
3680 if (elt != bar) { bar.style.pointerEvents = "none"; }
3681 else { delay.set(1000, maybeDisable); }
3682 }
3683 delay.set(1000, maybeDisable);
3684 };
3685
3686 NativeScrollbars.prototype.clear = function () {
3687 var parent = this.horiz.parentNode;
3688 parent.removeChild(this.horiz);
3689 parent.removeChild(this.vert);
3690 };
3691
3692 var NullScrollbars = function () {};
3693
3694 NullScrollbars.prototype.update = function () { return {bottom: 0, right: 0} };
3695 NullScrollbars.prototype.setScrollLeft = function () {};
3696 NullScrollbars.prototype.setScrollTop = function () {};
3697 NullScrollbars.prototype.clear = function () {};
3698
3699 function updateScrollbars(cm, measure) {
3700 if (!measure) { measure = measureForScrollbars(cm); }
3701 var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight;
3702 updateScrollbarsInner(cm, measure);
3703 for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) {
3704 if (startWidth != cm.display.barWidth && cm.options.lineWrapping)
3705 { updateHeightsInViewport(cm); }
3706 updateScrollbarsInner(cm, measureForScrollbars(cm));
3707 startWidth = cm.display.barWidth; startHeight = cm.display.barHeight;
3708 }
3709 }
3710
3711 // Re-synchronize the fake scrollbars with the actual size of the
3712 // content.
3713 function updateScrollbarsInner(cm, measure) {
3714 var d = cm.display;
3715 var sizes = d.scrollbars.update(measure);
3716
3717 d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px";
3718 d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px";
3719 d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent";
3720
3721 if (sizes.right && sizes.bottom) {
3722 d.scrollbarFiller.style.display = "block";
3723 d.scrollbarFiller.style.height = sizes.bottom + "px";
3724 d.scrollbarFiller.style.width = sizes.right + "px";
3725 } else { d.scrollbarFiller.style.display = ""; }
3726 if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
3727 d.gutterFiller.style.display = "block";
3728 d.gutterFiller.style.height = sizes.bottom + "px";
3729 d.gutterFiller.style.width = measure.gutterWidth + "px";
3730 } else { d.gutterFiller.style.display = ""; }
3731 }
3732
3733 var scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars};
3734
3735 function initScrollbars(cm) {
3736 if (cm.display.scrollbars) {
3737 cm.display.scrollbars.clear();
3738 if (cm.display.scrollbars.addClass)
3739 { rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
3740 }
3741
3742 cm.display.scrollbars = new scrollbarModel[cm.options.scrollbarStyle](function (node) {
3743 cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller);
3744 // Prevent clicks in the scrollbars from killing focus
3745 on(node, "mousedown", function () {
3746 if (cm.state.focused) { setTimeout(function () { return cm.display.input.focus(); }, 0); }
3747 });
3748 node.setAttribute("cm-not-content", "true");
3749 }, function (pos, axis) {
3750 if (axis == "horizontal") { setScrollLeft(cm, pos); }
3751 else { updateScrollTop(cm, pos); }
3752 }, cm);
3753 if (cm.display.scrollbars.addClass)
3754 { addClass(cm.display.wrapper, cm.display.scrollbars.addClass); }
3755 }
3756
3757 // Operations are used to wrap a series of changes to the editor
3758 // state in such a way that each change won't have to update the
3759 // cursor and display (which would be awkward, slow, and
3760 // error-prone). Instead, display updates are batched and then all
3761 // combined and executed at once.
3762
3763 var nextOpId = 0;
3764 // Start a new operation.
3765 function startOperation(cm) {
3766 cm.curOp = {
3767 cm: cm,
3768 viewChanged: false, // Flag that indicates that lines might need to be redrawn
3769 startHeight: cm.doc.height, // Used to detect need to update scrollbar
3770 forceUpdate: false, // Used to force a redraw
3771 updateInput: 0, // Whether to reset the input textarea
3772 typing: false, // Whether this reset should be careful to leave existing text (for compositing)
3773 changeObjs: null, // Accumulated changes, for firing change events
3774 cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on
3775 cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already
3776 selectionChanged: false, // Whether the selection needs to be redrawn
3777 updateMaxLine: false, // Set when the widest line needs to be determined anew
3778 scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet
3779 scrollToPos: null, // Used to scroll to a specific position
3780 focus: false,
3781 id: ++nextOpId // Unique ID
3782 };
3783 pushOperation(cm.curOp);
3784 }
3785
3786 // Finish an operation, updating the display and signalling delayed events
3787 function endOperation(cm) {
3788 var op = cm.curOp;
3789 if (op) { finishOperation(op, function (group) {
3790 for (var i = 0; i < group.ops.length; i++)
3791 { group.ops[i].cm.curOp = null; }
3792 endOperations(group);
3793 }); }
3794 }
3795
3796 // The DOM updates done when an operation finishes are batched so
3797 // that the minimum number of relayouts are required.
3798 function endOperations(group) {
3799 var ops = group.ops;
3800 for (var i = 0; i < ops.length; i++) // Read DOM
3801 { endOperation_R1(ops[i]); }
3802 for (var i$1 = 0; i$1 < ops.length; i$1++) // Write DOM (maybe)
3803 { endOperation_W1(ops[i$1]); }
3804 for (var i$2 = 0; i$2 < ops.length; i$2++) // Read DOM
3805 { endOperation_R2(ops[i$2]); }
3806 for (var i$3 = 0; i$3 < ops.length; i$3++) // Write DOM (maybe)
3807 { endOperation_W2(ops[i$3]); }
3808 for (var i$4 = 0; i$4 < ops.length; i$4++) // Read DOM
3809 { endOperation_finish(ops[i$4]); }
3810 }
3811
3812 function endOperation_R1(op) {
3813 var cm = op.cm, display = cm.display;
3814 maybeClipScrollbars(cm);
3815 if (op.updateMaxLine) { findMaxLine(cm); }
3816
3817 op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null ||
3818 op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom ||
3819 op.scrollToPos.to.line >= display.viewTo) ||
3820 display.maxLineChanged && cm.options.lineWrapping;
3821 op.update = op.mustUpdate &&
3822 new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate);
3823 }
3824
3825 function endOperation_W1(op) {
3826 op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update);
3827 }
3828
3829 function endOperation_R2(op) {
3830 var cm = op.cm, display = cm.display;
3831 if (op.updatedDisplay) { updateHeightsInViewport(cm); }
3832
3833 op.barMeasure = measureForScrollbars(cm);
3834
3835 // If the max line changed since it was last measured, measure it,
3836 // and ensure the document's width matches it.
3837 // updateDisplay_W2 will use these properties to do the actual resizing
3838 if (display.maxLineChanged && !cm.options.lineWrapping) {
3839 op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3;
3840 cm.display.sizerWidth = op.adjustWidthTo;
3841 op.barMeasure.scrollWidth =
3842 Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth);
3843 op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm));
3844 }
3845
3846 if (op.updatedDisplay || op.selectionChanged)
3847 { op.preparedSelection = display.input.prepareSelection(); }
3848 }
3849
3850 function endOperation_W2(op) {
3851 var cm = op.cm;
3852
3853 if (op.adjustWidthTo != null) {
3854 cm.display.sizer.style.minWidth = op.adjustWidthTo + "px";
3855 if (op.maxScrollLeft < cm.doc.scrollLeft)
3856 { setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); }
3857 cm.display.maxLineChanged = false;
3858 }
3859
3860 var takeFocus = op.focus && op.focus == activeElt();
3861 if (op.preparedSelection)
3862 { cm.display.input.showSelection(op.preparedSelection, takeFocus); }
3863 if (op.updatedDisplay || op.startHeight != cm.doc.height)
3864 { updateScrollbars(cm, op.barMeasure); }
3865 if (op.updatedDisplay)
3866 { setDocumentHeight(cm, op.barMeasure); }
3867
3868 if (op.selectionChanged) { restartBlink(cm); }
3869
3870 if (cm.state.focused && op.updateInput)
3871 { cm.display.input.reset(op.typing); }
3872 if (takeFocus) { ensureFocus(op.cm); }
3873 }
3874
3875 function endOperation_finish(op) {
3876 var cm = op.cm, display = cm.display, doc = cm.doc;
3877
3878 if (op.updatedDisplay) { postUpdateDisplay(cm, op.update); }
3879
3880 // Abort mouse wheel delta measurement, when scrolling explicitly
3881 if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos))
3882 { display.wheelStartX = display.wheelStartY = null; }
3883
3884 // Propagate the scroll position to the actual DOM scroller
3885 if (op.scrollTop != null) { setScrollTop(cm, op.scrollTop, op.forceScroll); }
3886
3887 if (op.scrollLeft != null) { setScrollLeft(cm, op.scrollLeft, true, true); }
3888 // If we need to scroll a specific position into view, do so.
3889 if (op.scrollToPos) {
3890 var rect = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from),
3891 clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin);
3892 maybeScrollWindow(cm, rect);
3893 }
3894
3895 // Fire events for markers that are hidden/unidden by editing or
3896 // undoing
3897 var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
3898 if (hidden) { for (var i = 0; i < hidden.length; ++i)
3899 { if (!hidden[i].lines.length) { signal(hidden[i], "hide"); } } }
3900 if (unhidden) { for (var i$1 = 0; i$1 < unhidden.length; ++i$1)
3901 { if (unhidden[i$1].lines.length) { signal(unhidden[i$1], "unhide"); } } }
3902
3903 if (display.wrapper.offsetHeight)
3904 { doc.scrollTop = cm.display.scroller.scrollTop; }
3905
3906 // Fire change events, and delayed event handlers
3907 if (op.changeObjs)
3908 { signal(cm, "changes", cm, op.changeObjs); }
3909 if (op.update)
3910 { op.update.finish(); }
3911 }
3912
3913 // Run the given function in an operation
3914 function runInOp(cm, f) {
3915 if (cm.curOp) { return f() }
3916 startOperation(cm);
3917 try { return f() }
3918 finally { endOperation(cm); }
3919 }
3920 // Wraps a function in an operation. Returns the wrapped function.
3921 function operation(cm, f) {
3922 return function() {
3923 if (cm.curOp) { return f.apply(cm, arguments) }
3924 startOperation(cm);
3925 try { return f.apply(cm, arguments) }
3926 finally { endOperation(cm); }
3927 }
3928 }
3929 // Used to add methods to editor and doc instances, wrapping them in
3930 // operations.
3931 function methodOp(f) {
3932 return function() {
3933 if (this.curOp) { return f.apply(this, arguments) }
3934 startOperation(this);
3935 try { return f.apply(this, arguments) }
3936 finally { endOperation(this); }
3937 }
3938 }
3939 function docMethodOp(f) {
3940 return function() {
3941 var cm = this.cm;
3942 if (!cm || cm.curOp) { return f.apply(this, arguments) }
3943 startOperation(cm);
3944 try { return f.apply(this, arguments) }
3945 finally { endOperation(cm); }
3946 }
3947 }
3948
3949 // HIGHLIGHT WORKER
3950
3951 function startWorker(cm, time) {
3952 if (cm.doc.highlightFrontier < cm.display.viewTo)
3953 { cm.state.highlight.set(time, bind(highlightWorker, cm)); }
3954 }
3955
3956 function highlightWorker(cm) {
3957 var doc = cm.doc;
3958 if (doc.highlightFrontier >= cm.display.viewTo) { return }
3959 var end = +new Date + cm.options.workTime;
3960 var context = getContextBefore(cm, doc.highlightFrontier);
3961 var changedLines = [];
3962
3963 doc.iter(context.line, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function (line) {
3964 if (context.line >= cm.display.viewFrom) { // Visible
3965 var oldStyles = line.styles;
3966 var resetState = line.text.length > cm.options.maxHighlightLength ? copyState(doc.mode, context.state) : null;
3967 var highlighted = highlightLine(cm, line, context, true);
3968 if (resetState) { context.state = resetState; }
3969 line.styles = highlighted.styles;
3970 var oldCls = line.styleClasses, newCls = highlighted.classes;
3971 if (newCls) { line.styleClasses = newCls; }
3972 else if (oldCls) { line.styleClasses = null; }
3973 var ischange = !oldStyles || oldStyles.length != line.styles.length ||
3974 oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass);
3975 for (var i = 0; !ischange && i < oldStyles.length; ++i) { ischange = oldStyles[i] != line.styles[i]; }
3976 if (ischange) { changedLines.push(context.line); }
3977 line.stateAfter = context.save();
3978 context.nextLine();
3979 } else {
3980 if (line.text.length <= cm.options.maxHighlightLength)
3981 { processLine(cm, line.text, context); }
3982 line.stateAfter = context.line % 5 == 0 ? context.save() : null;
3983 context.nextLine();
3984 }
3985 if (+new Date > end) {
3986 startWorker(cm, cm.options.workDelay);
3987 return true
3988 }
3989 });
3990 doc.highlightFrontier = context.line;
3991 doc.modeFrontier = Math.max(doc.modeFrontier, context.line);
3992 if (changedLines.length) { runInOp(cm, function () {
3993 for (var i = 0; i < changedLines.length; i++)
3994 { regLineChange(cm, changedLines[i], "text"); }
3995 }); }
3996 }
3997
3998 // DISPLAY DRAWING
3999
4000 var DisplayUpdate = function(cm, viewport, force) {
4001 var display = cm.display;
4002
4003 this.viewport = viewport;
4004 // Store some values that we'll need later (but don't want to force a relayout for)
4005 this.visible = visibleLines(display, cm.doc, viewport);
4006 this.editorIsHidden = !display.wrapper.offsetWidth;
4007 this.wrapperHeight = display.wrapper.clientHeight;
4008 this.wrapperWidth = display.wrapper.clientWidth;
4009 this.oldDisplayWidth = displayWidth(cm);
4010 this.force = force;
4011 this.dims = getDimensions(cm);
4012 this.events = [];
4013 };
4014
4015 DisplayUpdate.prototype.signal = function (emitter, type) {
4016 if (hasHandler(emitter, type))
4017 { this.events.push(arguments); }
4018 };
4019 DisplayUpdate.prototype.finish = function () {
4020 for (var i = 0; i < this.events.length; i++)
4021 { signal.apply(null, this.events[i]); }
4022 };
4023
4024 function maybeClipScrollbars(cm) {
4025 var display = cm.display;
4026 if (!display.scrollbarsClipped && display.scroller.offsetWidth) {
4027 display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth;
4028 display.heightForcer.style.height = scrollGap(cm) + "px";
4029 display.sizer.style.marginBottom = -display.nativeBarWidth + "px";
4030 display.sizer.style.borderRightWidth = scrollGap(cm) + "px";
4031 display.scrollbarsClipped = true;
4032 }
4033 }
4034
4035 function selectionSnapshot(cm) {
4036 if (cm.hasFocus()) { return null }
4037 var active = activeElt();
4038 if (!active || !contains(cm.display.lineDiv, active)) { return null }
4039 var result = {activeElt: active};
4040 if (window.getSelection) {
4041 var sel = window.getSelection();
4042 if (sel.anchorNode && sel.extend && contains(cm.display.lineDiv, sel.anchorNode)) {
4043 result.anchorNode = sel.anchorNode;
4044 result.anchorOffset = sel.anchorOffset;
4045 result.focusNode = sel.focusNode;
4046 result.focusOffset = sel.focusOffset;
4047 }
4048 }
4049 return result
4050 }
4051
4052 function restoreSelection(snapshot) {
4053 if (!snapshot || !snapshot.activeElt || snapshot.activeElt == activeElt()) { return }
4054 snapshot.activeElt.focus();
4055 if (!/^(INPUT|TEXTAREA)$/.test(snapshot.activeElt.nodeName) &&
4056 snapshot.anchorNode && contains(document.body, snapshot.anchorNode) && contains(document.body, snapshot.focusNode)) {
4057 var sel = window.getSelection(), range = document.createRange();
4058 range.setEnd(snapshot.anchorNode, snapshot.anchorOffset);
4059 range.collapse(false);
4060 sel.removeAllRanges();
4061 sel.addRange(range);
4062 sel.extend(snapshot.focusNode, snapshot.focusOffset);
4063 }
4064 }
4065
4066 // Does the actual updating of the line display. Bails out
4067 // (returning false) when there is nothing to be done and forced is
4068 // false.
4069 function updateDisplayIfNeeded(cm, update) {
4070 var display = cm.display, doc = cm.doc;
4071
4072 if (update.editorIsHidden) {
4073 resetView(cm);
4074 return false
4075 }
4076
4077 // Bail out if the visible area is already rendered and nothing changed.
4078 if (!update.force &&
4079 update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo &&
4080 (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) &&
4081 display.renderedView == display.view && countDirtyView(cm) == 0)
4082 { return false }
4083
4084 if (maybeUpdateLineNumberWidth(cm)) {
4085 resetView(cm);
4086 update.dims = getDimensions(cm);
4087 }
4088
4089 // Compute a suitable new viewport (from & to)
4090 var end = doc.first + doc.size;
4091 var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first);
4092 var to = Math.min(end, update.visible.to + cm.options.viewportMargin);
4093 if (display.viewFrom < from && from - display.viewFrom < 20) { from = Math.max(doc.first, display.viewFrom); }
4094 if (display.viewTo > to && display.viewTo - to < 20) { to = Math.min(end, display.viewTo); }
4095 if (sawCollapsedSpans) {
4096 from = visualLineNo(cm.doc, from);
4097 to = visualLineEndNo(cm.doc, to);
4098 }
4099
4100 var different = from != display.viewFrom || to != display.viewTo ||
4101 display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth;
4102 adjustView(cm, from, to);
4103
4104 display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom));
4105 // Position the mover div to align with the current scroll position
4106 cm.display.mover.style.top = display.viewOffset + "px";
4107
4108 var toUpdate = countDirtyView(cm);
4109 if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view &&
4110 (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo))
4111 { return false }
4112
4113 // For big changes, we hide the enclosing element during the
4114 // update, since that speeds up the operations on most browsers.
4115 var selSnapshot = selectionSnapshot(cm);
4116 if (toUpdate > 4) { display.lineDiv.style.display = "none"; }
4117 patchDisplay(cm, display.updateLineNumbers, update.dims);
4118 if (toUpdate > 4) { display.lineDiv.style.display = ""; }
4119 display.renderedView = display.view;
4120 // There might have been a widget with a focused element that got
4121 // hidden or updated, if so re-focus it.
4122 restoreSelection(selSnapshot);
4123
4124 // Prevent selection and cursors from interfering with the scroll
4125 // width and height.
4126 removeChildren(display.cursorDiv);
4127 removeChildren(display.selectionDiv);
4128 display.gutters.style.height = display.sizer.style.minHeight = 0;
4129
4130 if (different) {
4131 display.lastWrapHeight = update.wrapperHeight;
4132 display.lastWrapWidth = update.wrapperWidth;
4133 startWorker(cm, 400);
4134 }
4135
4136 display.updateLineNumbers = null;
4137
4138 return true
4139 }
4140
4141 function postUpdateDisplay(cm, update) {
4142 var viewport = update.viewport;
4143
4144 for (var first = true;; first = false) {
4145 if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) {
4146 // Clip forced viewport to actual scrollable area.
4147 if (viewport && viewport.top != null)
4148 { viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; }
4149 // Updated line heights might result in the drawn area not
4150 // actually covering the viewport. Keep looping until it does.
4151 update.visible = visibleLines(cm.display, cm.doc, viewport);
4152 if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo)
4153 { break }
4154 } else if (first) {
4155 update.visible = visibleLines(cm.display, cm.doc, viewport);
4156 }
4157 if (!updateDisplayIfNeeded(cm, update)) { break }
4158 updateHeightsInViewport(cm);
4159 var barMeasure = measureForScrollbars(cm);
4160 updateSelection(cm);
4161 updateScrollbars(cm, barMeasure);
4162 setDocumentHeight(cm, barMeasure);
4163 update.force = false;
4164 }
4165
4166 update.signal(cm, "update", cm);
4167 if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) {
4168 update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo);
4169 cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo;
4170 }
4171 }
4172
4173 function updateDisplaySimple(cm, viewport) {
4174 var update = new DisplayUpdate(cm, viewport);
4175 if (updateDisplayIfNeeded(cm, update)) {
4176 updateHeightsInViewport(cm);
4177 postUpdateDisplay(cm, update);
4178 var barMeasure = measureForScrollbars(cm);
4179 updateSelection(cm);
4180 updateScrollbars(cm, barMeasure);
4181 setDocumentHeight(cm, barMeasure);
4182 update.finish();
4183 }
4184 }
4185
4186 // Sync the actual display DOM structure with display.view, removing
4187 // nodes for lines that are no longer in view, and creating the ones
4188 // that are not there yet, and updating the ones that are out of
4189 // date.
4190 function patchDisplay(cm, updateNumbersFrom, dims) {
4191 var display = cm.display, lineNumbers = cm.options.lineNumbers;
4192 var container = display.lineDiv, cur = container.firstChild;
4193
4194 function rm(node) {
4195 var next = node.nextSibling;
4196 // Works around a throw-scroll bug in OS X Webkit
4197 if (webkit && mac && cm.display.currentWheelTarget == node)
4198 { node.style.display = "none"; }
4199 else
4200 { node.parentNode.removeChild(node); }
4201 return next
4202 }
4203
4204 var view = display.view, lineN = display.viewFrom;
4205 // Loop over the elements in the view, syncing cur (the DOM nodes
4206 // in display.lineDiv) with the view as we go.
4207 for (var i = 0; i < view.length; i++) {
4208 var lineView = view[i];
4209 if (lineView.hidden) ; else if (!lineView.node || lineView.node.parentNode != container) { // Not drawn yet
4210 var node = buildLineElement(cm, lineView, lineN, dims);
4211 container.insertBefore(node, cur);
4212 } else { // Already drawn
4213 while (cur != lineView.node) { cur = rm(cur); }
4214 var updateNumber = lineNumbers && updateNumbersFrom != null &&
4215 updateNumbersFrom <= lineN && lineView.lineNumber;
4216 if (lineView.changes) {
4217 if (indexOf(lineView.changes, "gutter") > -1) { updateNumber = false; }
4218 updateLineForChanges(cm, lineView, lineN, dims);
4219 }
4220 if (updateNumber) {
4221 removeChildren(lineView.lineNumber);
4222 lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN)));
4223 }
4224 cur = lineView.node.nextSibling;
4225 }
4226 lineN += lineView.size;
4227 }
4228 while (cur) { cur = rm(cur); }
4229 }
4230
4231 function updateGutterSpace(display) {
4232 var width = display.gutters.offsetWidth;
4233 display.sizer.style.marginLeft = width + "px";
4234 }
4235
4236 function setDocumentHeight(cm, measure) {
4237 cm.display.sizer.style.minHeight = measure.docHeight + "px";
4238 cm.display.heightForcer.style.top = measure.docHeight + "px";
4239 cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px";
4240 }
4241
4242 // Re-align line numbers and gutter marks to compensate for
4243 // horizontal scrolling.
4244 function alignHorizontally(cm) {
4245 var display = cm.display, view = display.view;
4246 if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) { return }
4247 var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
4248 var gutterW = display.gutters.offsetWidth, left = comp + "px";
4249 for (var i = 0; i < view.length; i++) { if (!view[i].hidden) {
4250 if (cm.options.fixedGutter) {
4251 if (view[i].gutter)
4252 { view[i].gutter.style.left = left; }
4253 if (view[i].gutterBackground)
4254 { view[i].gutterBackground.style.left = left; }
4255 }
4256 var align = view[i].alignable;
4257 if (align) { for (var j = 0; j < align.length; j++)
4258 { align[j].style.left = left; } }
4259 } }
4260 if (cm.options.fixedGutter)
4261 { display.gutters.style.left = (comp + gutterW) + "px"; }
4262 }
4263
4264 // Used to ensure that the line number gutter is still the right
4265 // size for the current document size. Returns true when an update
4266 // is needed.
4267 function maybeUpdateLineNumberWidth(cm) {
4268 if (!cm.options.lineNumbers) { return false }
4269 var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
4270 if (last.length != display.lineNumChars) {
4271 var test = display.measure.appendChild(elt("div", [elt("div", last)],
4272 "CodeMirror-linenumber CodeMirror-gutter-elt"));
4273 var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
4274 display.lineGutter.style.width = "";
4275 display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1;
4276 display.lineNumWidth = display.lineNumInnerWidth + padding;
4277 display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
4278 display.lineGutter.style.width = display.lineNumWidth + "px";
4279 updateGutterSpace(cm.display);
4280 return true
4281 }
4282 return false
4283 }
4284
4285 function getGutters(gutters, lineNumbers) {
4286 var result = [], sawLineNumbers = false;
4287 for (var i = 0; i < gutters.length; i++) {
4288 var name = gutters[i], style = null;
4289 if (typeof name != "string") { style = name.style; name = name.className; }
4290 if (name == "CodeMirror-linenumbers") {
4291 if (!lineNumbers) { continue }
4292 else { sawLineNumbers = true; }
4293 }
4294 result.push({className: name, style: style});
4295 }
4296 if (lineNumbers && !sawLineNumbers) { result.push({className: "CodeMirror-linenumbers", style: null}); }
4297 return result
4298 }
4299
4300 // Rebuild the gutter elements, ensure the margin to the left of the
4301 // code matches their width.
4302 function renderGutters(display) {
4303 var gutters = display.gutters, specs = display.gutterSpecs;
4304 removeChildren(gutters);
4305 display.lineGutter = null;
4306 for (var i = 0; i < specs.length; ++i) {
4307 var ref = specs[i];
4308 var className = ref.className;
4309 var style = ref.style;
4310 var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + className));
4311 if (style) { gElt.style.cssText = style; }
4312 if (className == "CodeMirror-linenumbers") {
4313 display.lineGutter = gElt;
4314 gElt.style.width = (display.lineNumWidth || 1) + "px";
4315 }
4316 }
4317 gutters.style.display = specs.length ? "" : "none";
4318 updateGutterSpace(display);
4319 }
4320
4321 function updateGutters(cm) {
4322 renderGutters(cm.display);
4323 regChange(cm);
4324 alignHorizontally(cm);
4325 }
4326
4327 // The display handles the DOM integration, both for input reading
4328 // and content drawing. It holds references to DOM nodes and
4329 // display-related state.
4330
4331 function Display(place, doc, input, options) {
4332 var d = this;
4333 this.input = input;
4334
4335 // Covers bottom-right square when both scrollbars are present.
4336 d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
4337 d.scrollbarFiller.setAttribute("cm-not-content", "true");
4338 // Covers bottom of gutter when coverGutterNextToScrollbar is on
4339 // and h scrollbar is present.
4340 d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
4341 d.gutterFiller.setAttribute("cm-not-content", "true");
4342 // Will contain the actual code, positioned to cover the viewport.
4343 d.lineDiv = eltP("div", null, "CodeMirror-code");
4344 // Elements are added to these to represent selection and cursors.
4345 d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
4346 d.cursorDiv = elt("div", null, "CodeMirror-cursors");
4347 // A visibility: hidden element used to find the size of things.
4348 d.measure = elt("div", null, "CodeMirror-measure");
4349 // When lines outside of the viewport are measured, they are drawn in this.
4350 d.lineMeasure = elt("div", null, "CodeMirror-measure");
4351 // Wraps everything that needs to exist inside the vertically-padded coordinate system
4352 d.lineSpace = eltP("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv],
4353 null, "position: relative; outline: none");
4354 var lines = eltP("div", [d.lineSpace], "CodeMirror-lines");
4355 // Moved around its parent to cover visible view.
4356 d.mover = elt("div", [lines], null, "position: relative");
4357 // Set to the height of the document, allowing scrolling.
4358 d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
4359 d.sizerWidth = null;
4360 // Behavior of elts with overflow: auto and padding is
4361 // inconsistent across browsers. This is used to ensure the
4362 // scrollable area is big enough.
4363 d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;");
4364 // Will contain the gutters, if any.
4365 d.gutters = elt("div", null, "CodeMirror-gutters");
4366 d.lineGutter = null;
4367 // Actual scrollable element.
4368 d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
4369 d.scroller.setAttribute("tabIndex", "-1");
4370 // The element in which the editor lives.
4371 d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
4372
4373 // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported)
4374 if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
4375 if (!webkit && !(gecko && mobile)) { d.scroller.draggable = true; }
4376
4377 if (place) {
4378 if (place.appendChild) { place.appendChild(d.wrapper); }
4379 else { place(d.wrapper); }
4380 }
4381
4382 // Current rendered range (may be bigger than the view window).
4383 d.viewFrom = d.viewTo = doc.first;
4384 d.reportedViewFrom = d.reportedViewTo = doc.first;
4385 // Information about the rendered lines.
4386 d.view = [];
4387 d.renderedView = null;
4388 // Holds info about a single rendered line when it was rendered
4389 // for measurement, while not in view.
4390 d.externalMeasured = null;
4391 // Empty space (in pixels) above the view
4392 d.viewOffset = 0;
4393 d.lastWrapHeight = d.lastWrapWidth = 0;
4394 d.updateLineNumbers = null;
4395
4396 d.nativeBarWidth = d.barHeight = d.barWidth = 0;
4397 d.scrollbarsClipped = false;
4398
4399 // Used to only resize the line number gutter when necessary (when
4400 // the amount of lines crosses a boundary that makes its width change)
4401 d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
4402 // Set to true when a non-horizontal-scrolling line widget is
4403 // added. As an optimization, line widget aligning is skipped when
4404 // this is false.
4405 d.alignWidgets = false;
4406
4407 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
4408
4409 // Tracks the maximum line length so that the horizontal scrollbar
4410 // can be kept static when scrolling.
4411 d.maxLine = null;
4412 d.maxLineLength = 0;
4413 d.maxLineChanged = false;
4414
4415 // Used for measuring wheel scrolling granularity
4416 d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
4417
4418 // True when shift is held down.
4419 d.shift = false;
4420
4421 // Used to track whether anything happened since the context menu
4422 // was opened.
4423 d.selForContextMenu = null;
4424
4425 d.activeTouch = null;
4426
4427 d.gutterSpecs = getGutters(options.gutters, options.lineNumbers);
4428 renderGutters(d);
4429
4430 input.init(d);
4431 }
4432
4433 // Since the delta values reported on mouse wheel events are
4434 // unstandardized between browsers and even browser versions, and
4435 // generally horribly unpredictable, this code starts by measuring
4436 // the scroll effect that the first few mouse wheel events have,
4437 // and, from that, detects the way it can convert deltas to pixel
4438 // offsets afterwards.
4439 //
4440 // The reason we want to know the amount a wheel event will scroll
4441 // is that it gives us a chance to update the display before the
4442 // actual scrolling happens, reducing flickering.
4443
4444 var wheelSamples = 0, wheelPixelsPerUnit = null;
4445 // Fill in a browser-detected starting value on browsers where we
4446 // know one. These don't have to be accurate -- the result of them
4447 // being wrong would just be a slight flicker on the first wheel
4448 // scroll (if it is large enough).
4449 if (ie) { wheelPixelsPerUnit = -.53; }
4450 else if (gecko) { wheelPixelsPerUnit = 15; }
4451 else if (chrome) { wheelPixelsPerUnit = -.7; }
4452 else if (safari) { wheelPixelsPerUnit = -1/3; }
4453
4454 function wheelEventDelta(e) {
4455 var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
4456 if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) { dx = e.detail; }
4457 if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) { dy = e.detail; }
4458 else if (dy == null) { dy = e.wheelDelta; }
4459 return {x: dx, y: dy}
4460 }
4461 function wheelEventPixels(e) {
4462 var delta = wheelEventDelta(e);
4463 delta.x *= wheelPixelsPerUnit;
4464 delta.y *= wheelPixelsPerUnit;
4465 return delta
4466 }
4467
4468 function onScrollWheel(cm, e) {
4469 var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y;
4470
4471 var display = cm.display, scroll = display.scroller;
4472 // Quit if there's nothing to scroll here
4473 var canScrollX = scroll.scrollWidth > scroll.clientWidth;
4474 var canScrollY = scroll.scrollHeight > scroll.clientHeight;
4475 if (!(dx && canScrollX || dy && canScrollY)) { return }
4476
4477 // Webkit browsers on OS X abort momentum scrolls when the target
4478 // of the scroll event is removed from the scrollable element.
4479 // This hack (see related code in patchDisplay) makes sure the
4480 // element is kept around.
4481 if (dy && mac && webkit) {
4482 outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) {
4483 for (var i = 0; i < view.length; i++) {
4484 if (view[i].node == cur) {
4485 cm.display.currentWheelTarget = cur;
4486 break outer
4487 }
4488 }
4489 }
4490 }
4491
4492 // On some browsers, horizontal scrolling will cause redraws to
4493 // happen before the gutter has been realigned, causing it to
4494 // wriggle around in a most unseemly way. When we have an
4495 // estimated pixels/delta value, we just handle horizontal
4496 // scrolling entirely here. It'll be slightly off from native, but
4497 // better than glitching out.
4498 if (dx && !gecko && !presto && wheelPixelsPerUnit != null) {
4499 if (dy && canScrollY)
4500 { updateScrollTop(cm, Math.max(0, scroll.scrollTop + dy * wheelPixelsPerUnit)); }
4501 setScrollLeft(cm, Math.max(0, scroll.scrollLeft + dx * wheelPixelsPerUnit));
4502 // Only prevent default scrolling if vertical scrolling is
4503 // actually possible. Otherwise, it causes vertical scroll
4504 // jitter on OSX trackpads when deltaX is small and deltaY
4505 // is large (issue #3579)
4506 if (!dy || (dy && canScrollY))
4507 { e_preventDefault(e); }
4508 display.wheelStartX = null; // Abort measurement, if in progress
4509 return
4510 }
4511
4512 // 'Project' the visible viewport to cover the area that is being
4513 // scrolled into view (if we know enough to estimate it).
4514 if (dy && wheelPixelsPerUnit != null) {
4515 var pixels = dy * wheelPixelsPerUnit;
4516 var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
4517 if (pixels < 0) { top = Math.max(0, top + pixels - 50); }
4518 else { bot = Math.min(cm.doc.height, bot + pixels + 50); }
4519 updateDisplaySimple(cm, {top: top, bottom: bot});
4520 }
4521
4522 if (wheelSamples < 20) {
4523 if (display.wheelStartX == null) {
4524 display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
4525 display.wheelDX = dx; display.wheelDY = dy;
4526 setTimeout(function () {
4527 if (display.wheelStartX == null) { return }
4528 var movedX = scroll.scrollLeft - display.wheelStartX;
4529 var movedY = scroll.scrollTop - display.wheelStartY;
4530 var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
4531 (movedX && display.wheelDX && movedX / display.wheelDX);
4532 display.wheelStartX = display.wheelStartY = null;
4533 if (!sample) { return }
4534 wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
4535 ++wheelSamples;
4536 }, 200);
4537 } else {
4538 display.wheelDX += dx; display.wheelDY += dy;
4539 }
4540 }
4541 }
4542
4543 // Selection objects are immutable. A new one is created every time
4544 // the selection changes. A selection is one or more non-overlapping
4545 // (and non-touching) ranges, sorted, and an integer that indicates
4546 // which one is the primary selection (the one that's scrolled into
4547 // view, that getCursor returns, etc).
4548 var Selection = function(ranges, primIndex) {
4549 this.ranges = ranges;
4550 this.primIndex = primIndex;
4551 };
4552
4553 Selection.prototype.primary = function () { return this.ranges[this.primIndex] };
4554
4555 Selection.prototype.equals = function (other) {
4556 if (other == this) { return true }
4557 if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) { return false }
4558 for (var i = 0; i < this.ranges.length; i++) {
4559 var here = this.ranges[i], there = other.ranges[i];
4560 if (!equalCursorPos(here.anchor, there.anchor) || !equalCursorPos(here.head, there.head)) { return false }
4561 }
4562 return true
4563 };
4564
4565 Selection.prototype.deepCopy = function () {
4566 var out = [];
4567 for (var i = 0; i < this.ranges.length; i++)
4568 { out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head)); }
4569 return new Selection(out, this.primIndex)
4570 };
4571
4572 Selection.prototype.somethingSelected = function () {
4573 for (var i = 0; i < this.ranges.length; i++)
4574 { if (!this.ranges[i].empty()) { return true } }
4575 return false
4576 };
4577
4578 Selection.prototype.contains = function (pos, end) {
4579 if (!end) { end = pos; }
4580 for (var i = 0; i < this.ranges.length; i++) {
4581 var range = this.ranges[i];
4582 if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0)
4583 { return i }
4584 }
4585 return -1
4586 };
4587
4588 var Range = function(anchor, head) {
4589 this.anchor = anchor; this.head = head;
4590 };
4591
4592 Range.prototype.from = function () { return minPos(this.anchor, this.head) };
4593 Range.prototype.to = function () { return maxPos(this.anchor, this.head) };
4594 Range.prototype.empty = function () { return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch };
4595
4596 // Take an unsorted, potentially overlapping set of ranges, and
4597 // build a selection out of it. 'Consumes' ranges array (modifying
4598 // it).
4599 function normalizeSelection(cm, ranges, primIndex) {
4600 var mayTouch = cm && cm.options.selectionsMayTouch;
4601 var prim = ranges[primIndex];
4602 ranges.sort(function (a, b) { return cmp(a.from(), b.from()); });
4603 primIndex = indexOf(ranges, prim);
4604 for (var i = 1; i < ranges.length; i++) {
4605 var cur = ranges[i], prev = ranges[i - 1];
4606 var diff = cmp(prev.to(), cur.from());
4607 if (mayTouch && !cur.empty() ? diff > 0 : diff >= 0) {
4608 var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to());
4609 var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head;
4610 if (i <= primIndex) { --primIndex; }
4611 ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to));
4612 }
4613 }
4614 return new Selection(ranges, primIndex)
4615 }
4616
4617 function simpleSelection(anchor, head) {
4618 return new Selection([new Range(anchor, head || anchor)], 0)
4619 }
4620
4621 // Compute the position of the end of a change (its 'to' property
4622 // refers to the pre-change end).
4623 function changeEnd(change) {
4624 if (!change.text) { return change.to }
4625 return Pos(change.from.line + change.text.length - 1,
4626 lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0))
4627 }
4628
4629 // Adjust a position to refer to the post-change position of the
4630 // same text, or the end of the change if the change covers it.
4631 function adjustForChange(pos, change) {
4632 if (cmp(pos, change.from) < 0) { return pos }
4633 if (cmp(pos, change.to) <= 0) { return changeEnd(change) }
4634
4635 var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
4636 if (pos.line == change.to.line) { ch += changeEnd(change).ch - change.to.ch; }
4637 return Pos(line, ch)
4638 }
4639
4640 function computeSelAfterChange(doc, change) {
4641 var out = [];
4642 for (var i = 0; i < doc.sel.ranges.length; i++) {
4643 var range = doc.sel.ranges[i];
4644 out.push(new Range(adjustForChange(range.anchor, change),
4645 adjustForChange(range.head, change)));
4646 }
4647 return normalizeSelection(doc.cm, out, doc.sel.primIndex)
4648 }
4649
4650 function offsetPos(pos, old, nw) {
4651 if (pos.line == old.line)
4652 { return Pos(nw.line, pos.ch - old.ch + nw.ch) }
4653 else
4654 { return Pos(nw.line + (pos.line - old.line), pos.ch) }
4655 }
4656
4657 // Used by replaceSelections to allow moving the selection to the
4658 // start or around the replaced test. Hint may be "start" or "around".
4659 function computeReplacedSel(doc, changes, hint) {
4660 var out = [];
4661 var oldPrev = Pos(doc.first, 0), newPrev = oldPrev;
4662 for (var i = 0; i < changes.length; i++) {
4663 var change = changes[i];
4664 var from = offsetPos(change.from, oldPrev, newPrev);
4665 var to = offsetPos(changeEnd(change), oldPrev, newPrev);
4666 oldPrev = change.to;
4667 newPrev = to;
4668 if (hint == "around") {
4669 var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0;
4670 out[i] = new Range(inv ? to : from, inv ? from : to);
4671 } else {
4672 out[i] = new Range(from, from);
4673 }
4674 }
4675 return new Selection(out, doc.sel.primIndex)
4676 }
4677
4678 // Used to get the editor into a consistent state again when options change.
4679
4680 function loadMode(cm) {
4681 cm.doc.mode = getMode(cm.options, cm.doc.modeOption);
4682 resetModeState(cm);
4683 }
4684
4685 function resetModeState(cm) {
4686 cm.doc.iter(function (line) {
4687 if (line.stateAfter) { line.stateAfter = null; }
4688 if (line.styles) { line.styles = null; }
4689 });
4690 cm.doc.modeFrontier = cm.doc.highlightFrontier = cm.doc.first;
4691 startWorker(cm, 100);
4692 cm.state.modeGen++;
4693 if (cm.curOp) { regChange(cm); }
4694 }
4695
4696 // DOCUMENT DATA STRUCTURE
4697
4698 // By default, updates that start and end at the beginning of a line
4699 // are treated specially, in order to make the association of line
4700 // widgets and marker elements with the text behave more intuitive.
4701 function isWholeLineUpdate(doc, change) {
4702 return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" &&
4703 (!doc.cm || doc.cm.options.wholeLineUpdateBefore)
4704 }
4705
4706 // Perform a change on the document data structure.
4707 function updateDoc(doc, change, markedSpans, estimateHeight) {
4708 function spansFor(n) {return markedSpans ? markedSpans[n] : null}
4709 function update(line, text, spans) {
4710 updateLine(line, text, spans, estimateHeight);
4711 signalLater(line, "change", line, change);
4712 }
4713 function linesFor(start, end) {
4714 var result = [];
4715 for (var i = start; i < end; ++i)
4716 { result.push(new Line(text[i], spansFor(i), estimateHeight)); }
4717 return result
4718 }
4719
4720 var from = change.from, to = change.to, text = change.text;
4721 var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
4722 var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
4723
4724 // Adjust the line structure
4725 if (change.full) {
4726 doc.insert(0, linesFor(0, text.length));
4727 doc.remove(text.length, doc.size - text.length);
4728 } else if (isWholeLineUpdate(doc, change)) {
4729 // This is a whole-line replace. Treated specially to make
4730 // sure line objects move the way they are supposed to.
4731 var added = linesFor(0, text.length - 1);
4732 update(lastLine, lastLine.text, lastSpans);
4733 if (nlines) { doc.remove(from.line, nlines); }
4734 if (added.length) { doc.insert(from.line, added); }
4735 } else if (firstLine == lastLine) {
4736 if (text.length == 1) {
4737 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
4738 } else {
4739 var added$1 = linesFor(1, text.length - 1);
4740 added$1.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
4741 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4742 doc.insert(from.line + 1, added$1);
4743 }
4744 } else if (text.length == 1) {
4745 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
4746 doc.remove(from.line + 1, nlines);
4747 } else {
4748 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4749 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
4750 var added$2 = linesFor(1, text.length - 1);
4751 if (nlines > 1) { doc.remove(from.line + 1, nlines - 1); }
4752 doc.insert(from.line + 1, added$2);
4753 }
4754
4755 signalLater(doc, "change", doc, change);
4756 }
4757
4758 // Call f for all linked documents.
4759 function linkedDocs(doc, f, sharedHistOnly) {
4760 function propagate(doc, skip, sharedHist) {
4761 if (doc.linked) { for (var i = 0; i < doc.linked.length; ++i) {
4762 var rel = doc.linked[i];
4763 if (rel.doc == skip) { continue }
4764 var shared = sharedHist && rel.sharedHist;
4765 if (sharedHistOnly && !shared) { continue }
4766 f(rel.doc, shared);
4767 propagate(rel.doc, doc, shared);
4768 } }
4769 }
4770 propagate(doc, null, true);
4771 }
4772
4773 // Attach a document to an editor.
4774 function attachDoc(cm, doc) {
4775 if (doc.cm) { throw new Error("This document is already in use.") }
4776 cm.doc = doc;
4777 doc.cm = cm;
4778 estimateLineHeights(cm);
4779 loadMode(cm);
4780 setDirectionClass(cm);
4781 if (!cm.options.lineWrapping) { findMaxLine(cm); }
4782 cm.options.mode = doc.modeOption;
4783 regChange(cm);
4784 }
4785
4786 function setDirectionClass(cm) {
4787 (cm.doc.direction == "rtl" ? addClass : rmClass)(cm.display.lineDiv, "CodeMirror-rtl");
4788 }
4789
4790 function directionChanged(cm) {
4791 runInOp(cm, function () {
4792 setDirectionClass(cm);
4793 regChange(cm);
4794 });
4795 }
4796
4797 function History(startGen) {
4798 // Arrays of change events and selections. Doing something adds an
4799 // event to done and clears undo. Undoing moves events from done
4800 // to undone, redoing moves them in the other direction.
4801 this.done = []; this.undone = [];
4802 this.undoDepth = Infinity;
4803 // Used to track when changes can be merged into a single undo
4804 // event
4805 this.lastModTime = this.lastSelTime = 0;
4806 this.lastOp = this.lastSelOp = null;
4807 this.lastOrigin = this.lastSelOrigin = null;
4808 // Used by the isClean() method
4809 this.generation = this.maxGeneration = startGen || 1;
4810 }
4811
4812 // Create a history change event from an updateDoc-style change
4813 // object.
4814 function historyChangeFromChange(doc, change) {
4815 var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
4816 attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
4817 linkedDocs(doc, function (doc) { return attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); }, true);
4818 return histChange
4819 }
4820
4821 // Pop all selection events off the end of a history array. Stop at
4822 // a change event.
4823 function clearSelectionEvents(array) {
4824 while (array.length) {
4825 var last = lst(array);
4826 if (last.ranges) { array.pop(); }
4827 else { break }
4828 }
4829 }
4830
4831 // Find the top change event in the history. Pop off selection
4832 // events that are in the way.
4833 function lastChangeEvent(hist, force) {
4834 if (force) {
4835 clearSelectionEvents(hist.done);
4836 return lst(hist.done)
4837 } else if (hist.done.length && !lst(hist.done).ranges) {
4838 return lst(hist.done)
4839 } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) {
4840 hist.done.pop();
4841 return lst(hist.done)
4842 }
4843 }
4844
4845 // Register a change in the history. Merges changes that are within
4846 // a single operation, or are close together with an origin that
4847 // allows merging (starting with "+") into a single event.
4848 function addChangeToHistory(doc, change, selAfter, opId) {
4849 var hist = doc.history;
4850 hist.undone.length = 0;
4851 var time = +new Date, cur;
4852 var last;
4853
4854 if ((hist.lastOp == opId ||
4855 hist.lastOrigin == change.origin && change.origin &&
4856 ((change.origin.charAt(0) == "+" && hist.lastModTime > time - (doc.cm ? doc.cm.options.historyEventDelay : 500)) ||
4857 change.origin.charAt(0) == "*")) &&
4858 (cur = lastChangeEvent(hist, hist.lastOp == opId))) {
4859 // Merge this change into the last event
4860 last = lst(cur.changes);
4861 if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) {
4862 // Optimized case for simple insertion -- don't want to add
4863 // new changesets for every character typed
4864 last.to = changeEnd(change);
4865 } else {
4866 // Add new sub-event
4867 cur.changes.push(historyChangeFromChange(doc, change));
4868 }
4869 } else {
4870 // Can not be merged, start a new event.
4871 var before = lst(hist.done);
4872 if (!before || !before.ranges)
4873 { pushSelectionToHistory(doc.sel, hist.done); }
4874 cur = {changes: [historyChangeFromChange(doc, change)],
4875 generation: hist.generation};
4876 hist.done.push(cur);
4877 while (hist.done.length > hist.undoDepth) {
4878 hist.done.shift();
4879 if (!hist.done[0].ranges) { hist.done.shift(); }
4880 }
4881 }
4882 hist.done.push(selAfter);
4883 hist.generation = ++hist.maxGeneration;
4884 hist.lastModTime = hist.lastSelTime = time;
4885 hist.lastOp = hist.lastSelOp = opId;
4886 hist.lastOrigin = hist.lastSelOrigin = change.origin;
4887
4888 if (!last) { signal(doc, "historyAdded"); }
4889 }
4890
4891 function selectionEventCanBeMerged(doc, origin, prev, sel) {
4892 var ch = origin.charAt(0);
4893 return ch == "*" ||
4894 ch == "+" &&
4895 prev.ranges.length == sel.ranges.length &&
4896 prev.somethingSelected() == sel.somethingSelected() &&
4897 new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500)
4898 }
4899
4900 // Called whenever the selection changes, sets the new selection as
4901 // the pending selection in the history, and pushes the old pending
4902 // selection into the 'done' array when it was significantly
4903 // different (in number of selected ranges, emptiness, or time).
4904 function addSelectionToHistory(doc, sel, opId, options) {
4905 var hist = doc.history, origin = options && options.origin;
4906
4907 // A new event is started when the previous origin does not match
4908 // the current, or the origins don't allow matching. Origins
4909 // starting with * are always merged, those starting with + are
4910 // merged when similar and close together in time.
4911 if (opId == hist.lastSelOp ||
4912 (origin && hist.lastSelOrigin == origin &&
4913 (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin ||
4914 selectionEventCanBeMerged(doc, origin, lst(hist.done), sel))))
4915 { hist.done[hist.done.length - 1] = sel; }
4916 else
4917 { pushSelectionToHistory(sel, hist.done); }
4918
4919 hist.lastSelTime = +new Date;
4920 hist.lastSelOrigin = origin;
4921 hist.lastSelOp = opId;
4922 if (options && options.clearRedo !== false)
4923 { clearSelectionEvents(hist.undone); }
4924 }
4925
4926 function pushSelectionToHistory(sel, dest) {
4927 var top = lst(dest);
4928 if (!(top && top.ranges && top.equals(sel)))
4929 { dest.push(sel); }
4930 }
4931
4932 // Used to store marked span information in the history.
4933 function attachLocalSpans(doc, change, from, to) {
4934 var existing = change["spans_" + doc.id], n = 0;
4935 doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function (line) {
4936 if (line.markedSpans)
4937 { (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; }
4938 ++n;
4939 });
4940 }
4941
4942 // When un/re-doing restores text containing marked spans, those
4943 // that have been explicitly cleared should not be restored.
4944 function removeClearedSpans(spans) {
4945 if (!spans) { return null }
4946 var out;
4947 for (var i = 0; i < spans.length; ++i) {
4948 if (spans[i].marker.explicitlyCleared) { if (!out) { out = spans.slice(0, i); } }
4949 else if (out) { out.push(spans[i]); }
4950 }
4951 return !out ? spans : out.length ? out : null
4952 }
4953
4954 // Retrieve and filter the old marked spans stored in a change event.
4955 function getOldSpans(doc, change) {
4956 var found = change["spans_" + doc.id];
4957 if (!found) { return null }
4958 var nw = [];
4959 for (var i = 0; i < change.text.length; ++i)
4960 { nw.push(removeClearedSpans(found[i])); }
4961 return nw
4962 }
4963
4964 // Used for un/re-doing changes from the history. Combines the
4965 // result of computing the existing spans with the set of spans that
4966 // existed in the history (so that deleting around a span and then
4967 // undoing brings back the span).
4968 function mergeOldSpans(doc, change) {
4969 var old = getOldSpans(doc, change);
4970 var stretched = stretchSpansOverChange(doc, change);
4971 if (!old) { return stretched }
4972 if (!stretched) { return old }
4973
4974 for (var i = 0; i < old.length; ++i) {
4975 var oldCur = old[i], stretchCur = stretched[i];
4976 if (oldCur && stretchCur) {
4977 spans: for (var j = 0; j < stretchCur.length; ++j) {
4978 var span = stretchCur[j];
4979 for (var k = 0; k < oldCur.length; ++k)
4980 { if (oldCur[k].marker == span.marker) { continue spans } }
4981 oldCur.push(span);
4982 }
4983 } else if (stretchCur) {
4984 old[i] = stretchCur;
4985 }
4986 }
4987 return old
4988 }
4989
4990 // Used both to provide a JSON-safe object in .getHistory, and, when
4991 // detaching a document, to split the history in two
4992 function copyHistoryArray(events, newGroup, instantiateSel) {
4993 var copy = [];
4994 for (var i = 0; i < events.length; ++i) {
4995 var event = events[i];
4996 if (event.ranges) {
4997 copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event);
4998 continue
4999 }
5000 var changes = event.changes, newChanges = [];
5001 copy.push({changes: newChanges});
5002 for (var j = 0; j < changes.length; ++j) {
5003 var change = changes[j], m = (void 0);
5004 newChanges.push({from: change.from, to: change.to, text: change.text});
5005 if (newGroup) { for (var prop in change) { if (m = prop.match(/^spans_(\d+)$/)) {
5006 if (indexOf(newGroup, Number(m[1])) > -1) {
5007 lst(newChanges)[prop] = change[prop];
5008 delete change[prop];
5009 }
5010 } } }
5011 }
5012 }
5013 return copy
5014 }
5015
5016 // The 'scroll' parameter given to many of these indicated whether
5017 // the new cursor position should be scrolled into view after
5018 // modifying the selection.
5019
5020 // If shift is held or the extend flag is set, extends a range to
5021 // include a given position (and optionally a second position).
5022 // Otherwise, simply returns the range between the given positions.
5023 // Used for cursor motion and such.
5024 function extendRange(range, head, other, extend) {
5025 if (extend) {
5026 var anchor = range.anchor;
5027 if (other) {
5028 var posBefore = cmp(head, anchor) < 0;
5029 if (posBefore != (cmp(other, anchor) < 0)) {
5030 anchor = head;
5031 head = other;
5032 } else if (posBefore != (cmp(head, other) < 0)) {
5033 head = other;
5034 }
5035 }
5036 return new Range(anchor, head)
5037 } else {
5038 return new Range(other || head, head)
5039 }
5040 }
5041
5042 // Extend the primary selection range, discard the rest.
5043 function extendSelection(doc, head, other, options, extend) {
5044 if (extend == null) { extend = doc.cm && (doc.cm.display.shift || doc.extend); }
5045 setSelection(doc, new Selection([extendRange(doc.sel.primary(), head, other, extend)], 0), options);
5046 }
5047
5048 // Extend all selections (pos is an array of selections with length
5049 // equal the number of selections)
5050 function extendSelections(doc, heads, options) {
5051 var out = [];
5052 var extend = doc.cm && (doc.cm.display.shift || doc.extend);
5053 for (var i = 0; i < doc.sel.ranges.length; i++)
5054 { out[i] = extendRange(doc.sel.ranges[i], heads[i], null, extend); }
5055 var newSel = normalizeSelection(doc.cm, out, doc.sel.primIndex);
5056 setSelection(doc, newSel, options);
5057 }
5058
5059 // Updates a single range in the selection.
5060 function replaceOneSelection(doc, i, range, options) {
5061 var ranges = doc.sel.ranges.slice(0);
5062 ranges[i] = range;
5063 setSelection(doc, normalizeSelection(doc.cm, ranges, doc.sel.primIndex), options);
5064 }
5065
5066 // Reset the selection to a single range.
5067 function setSimpleSelection(doc, anchor, head, options) {
5068 setSelection(doc, simpleSelection(anchor, head), options);
5069 }
5070
5071 // Give beforeSelectionChange handlers a change to influence a
5072 // selection update.
5073 function filterSelectionChange(doc, sel, options) {
5074 var obj = {
5075 ranges: sel.ranges,
5076 update: function(ranges) {
5077 this.ranges = [];
5078 for (var i = 0; i < ranges.length; i++)
5079 { this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor),
5080 clipPos(doc, ranges[i].head)); }
5081 },
5082 origin: options && options.origin
5083 };
5084 signal(doc, "beforeSelectionChange", doc, obj);
5085 if (doc.cm) { signal(doc.cm, "beforeSelectionChange", doc.cm, obj); }
5086 if (obj.ranges != sel.ranges) { return normalizeSelection(doc.cm, obj.ranges, obj.ranges.length - 1) }
5087 else { return sel }
5088 }
5089
5090 function setSelectionReplaceHistory(doc, sel, options) {
5091 var done = doc.history.done, last = lst(done);
5092 if (last && last.ranges) {
5093 done[done.length - 1] = sel;
5094 setSelectionNoUndo(doc, sel, options);
5095 } else {
5096 setSelection(doc, sel, options);
5097 }
5098 }
5099
5100 // Set a new selection.
5101 function setSelection(doc, sel, options) {
5102 setSelectionNoUndo(doc, sel, options);
5103 addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options);
5104 }
5105
5106 function setSelectionNoUndo(doc, sel, options) {
5107 if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange"))
5108 { sel = filterSelectionChange(doc, sel, options); }
5109
5110 var bias = options && options.bias ||
5111 (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1);
5112 setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true));
5113
5114 if (!(options && options.scroll === false) && doc.cm)
5115 { ensureCursorVisible(doc.cm); }
5116 }
5117
5118 function setSelectionInner(doc, sel) {
5119 if (sel.equals(doc.sel)) { return }
5120
5121 doc.sel = sel;
5122
5123 if (doc.cm) {
5124 doc.cm.curOp.updateInput = 1;
5125 doc.cm.curOp.selectionChanged = true;
5126 signalCursorActivity(doc.cm);
5127 }
5128 signalLater(doc, "cursorActivity", doc);
5129 }
5130
5131 // Verify that the selection does not partially select any atomic
5132 // marked ranges.
5133 function reCheckSelection(doc) {
5134 setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false));
5135 }
5136
5137 // Return a selection that does not partially select any atomic
5138 // ranges.
5139 function skipAtomicInSelection(doc, sel, bias, mayClear) {
5140 var out;
5141 for (var i = 0; i < sel.ranges.length; i++) {
5142 var range = sel.ranges[i];
5143 var old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i];
5144 var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear);
5145 var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear);
5146 if (out || newAnchor != range.anchor || newHead != range.head) {
5147 if (!out) { out = sel.ranges.slice(0, i); }
5148 out[i] = new Range(newAnchor, newHead);
5149 }
5150 }
5151 return out ? normalizeSelection(doc.cm, out, sel.primIndex) : sel
5152 }
5153
5154 function skipAtomicInner(doc, pos, oldPos, dir, mayClear) {
5155 var line = getLine(doc, pos.line);
5156 if (line.markedSpans) { for (var i = 0; i < line.markedSpans.length; ++i) {
5157 var sp = line.markedSpans[i], m = sp.marker;
5158
5159 // Determine if we should prevent the cursor being placed to the left/right of an atomic marker
5160 // Historically this was determined using the inclusiveLeft/Right option, but the new way to control it
5161 // is with selectLeft/Right
5162 var preventCursorLeft = ("selectLeft" in m) ? !m.selectLeft : m.inclusiveLeft;
5163 var preventCursorRight = ("selectRight" in m) ? !m.selectRight : m.inclusiveRight;
5164
5165 if ((sp.from == null || (preventCursorLeft ? sp.from <= pos.ch : sp.from < pos.ch)) &&
5166 (sp.to == null || (preventCursorRight ? sp.to >= pos.ch : sp.to > pos.ch))) {
5167 if (mayClear) {
5168 signal(m, "beforeCursorEnter");
5169 if (m.explicitlyCleared) {
5170 if (!line.markedSpans) { break }
5171 else {--i; continue}
5172 }
5173 }
5174 if (!m.atomic) { continue }
5175
5176 if (oldPos) {
5177 var near = m.find(dir < 0 ? 1 : -1), diff = (void 0);
5178 if (dir < 0 ? preventCursorRight : preventCursorLeft)
5179 { near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); }
5180 if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0))
5181 { return skipAtomicInner(doc, near, pos, dir, mayClear) }
5182 }
5183
5184 var far = m.find(dir < 0 ? -1 : 1);
5185 if (dir < 0 ? preventCursorLeft : preventCursorRight)
5186 { far = movePos(doc, far, dir, far.line == pos.line ? line : null); }
5187 return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null
5188 }
5189 } }
5190 return pos
5191 }
5192
5193 // Ensure a given position is not inside an atomic range.
5194 function skipAtomic(doc, pos, oldPos, bias, mayClear) {
5195 var dir = bias || 1;
5196 var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) ||
5197 (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) ||
5198 skipAtomicInner(doc, pos, oldPos, -dir, mayClear) ||
5199 (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true));
5200 if (!found) {
5201 doc.cantEdit = true;
5202 return Pos(doc.first, 0)
5203 }
5204 return found
5205 }
5206
5207 function movePos(doc, pos, dir, line) {
5208 if (dir < 0 && pos.ch == 0) {
5209 if (pos.line > doc.first) { return clipPos(doc, Pos(pos.line - 1)) }
5210 else { return null }
5211 } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) {
5212 if (pos.line < doc.first + doc.size - 1) { return Pos(pos.line + 1, 0) }
5213 else { return null }
5214 } else {
5215 return new Pos(pos.line, pos.ch + dir)
5216 }
5217 }
5218
5219 function selectAll(cm) {
5220 cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);
5221 }
5222
5223 // UPDATING
5224
5225 // Allow "beforeChange" event handlers to influence a change
5226 function filterChange(doc, change, update) {
5227 var obj = {
5228 canceled: false,
5229 from: change.from,
5230 to: change.to,
5231 text: change.text,
5232 origin: change.origin,
5233 cancel: function () { return obj.canceled = true; }
5234 };
5235 if (update) { obj.update = function (from, to, text, origin) {
5236 if (from) { obj.from = clipPos(doc, from); }
5237 if (to) { obj.to = clipPos(doc, to); }
5238 if (text) { obj.text = text; }
5239 if (origin !== undefined) { obj.origin = origin; }
5240 }; }
5241 signal(doc, "beforeChange", doc, obj);
5242 if (doc.cm) { signal(doc.cm, "beforeChange", doc.cm, obj); }
5243
5244 if (obj.canceled) {
5245 if (doc.cm) { doc.cm.curOp.updateInput = 2; }
5246 return null
5247 }
5248 return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}
5249 }
5250
5251 // Apply a change to a document, and add it to the document's
5252 // history, and propagating it to all linked documents.
5253 function makeChange(doc, change, ignoreReadOnly) {
5254 if (doc.cm) {
5255 if (!doc.cm.curOp) { return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly) }
5256 if (doc.cm.state.suppressEdits) { return }
5257 }
5258
5259 if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
5260 change = filterChange(doc, change, true);
5261 if (!change) { return }
5262 }
5263
5264 // Possibly split or suppress the update based on the presence
5265 // of read-only spans in its range.
5266 var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
5267 if (split) {
5268 for (var i = split.length - 1; i >= 0; --i)
5269 { makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text, origin: change.origin}); }
5270 } else {
5271 makeChangeInner(doc, change);
5272 }
5273 }
5274
5275 function makeChangeInner(doc, change) {
5276 if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) { return }
5277 var selAfter = computeSelAfterChange(doc, change);
5278 addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
5279
5280 makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
5281 var rebased = [];
5282
5283 linkedDocs(doc, function (doc, sharedHist) {
5284 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
5285 rebaseHist(doc.history, change);
5286 rebased.push(doc.history);
5287 }
5288 makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
5289 });
5290 }
5291
5292 // Revert a change stored in a document's history.
5293 function makeChangeFromHistory(doc, type, allowSelectionOnly) {
5294 var suppress = doc.cm && doc.cm.state.suppressEdits;
5295 if (suppress && !allowSelectionOnly) { return }
5296
5297 var hist = doc.history, event, selAfter = doc.sel;
5298 var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done;
5299
5300 // Verify that there is a useable event (so that ctrl-z won't
5301 // needlessly clear selection events)
5302 var i = 0;
5303 for (; i < source.length; i++) {
5304 event = source[i];
5305 if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges)
5306 { break }
5307 }
5308 if (i == source.length) { return }
5309 hist.lastOrigin = hist.lastSelOrigin = null;
5310
5311 for (;;) {
5312 event = source.pop();
5313 if (event.ranges) {
5314 pushSelectionToHistory(event, dest);
5315 if (allowSelectionOnly && !event.equals(doc.sel)) {
5316 setSelection(doc, event, {clearRedo: false});
5317 return
5318 }
5319 selAfter = event;
5320 } else if (suppress) {
5321 source.push(event);
5322 return
5323 } else { break }
5324 }
5325
5326 // Build up a reverse change object to add to the opposite history
5327 // stack (redo when undoing, and vice versa).
5328 var antiChanges = [];
5329 pushSelectionToHistory(selAfter, dest);
5330 dest.push({changes: antiChanges, generation: hist.generation});
5331 hist.generation = event.generation || ++hist.maxGeneration;
5332
5333 var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
5334
5335 var loop = function ( i ) {
5336 var change = event.changes[i];
5337 change.origin = type;
5338 if (filter && !filterChange(doc, change, false)) {
5339 source.length = 0;
5340 return {}
5341 }
5342
5343 antiChanges.push(historyChangeFromChange(doc, change));
5344
5345 var after = i ? computeSelAfterChange(doc, change) : lst(source);
5346 makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
5347 if (!i && doc.cm) { doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); }
5348 var rebased = [];
5349
5350 // Propagate to the linked documents
5351 linkedDocs(doc, function (doc, sharedHist) {
5352 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
5353 rebaseHist(doc.history, change);
5354 rebased.push(doc.history);
5355 }
5356 makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
5357 });
5358 };
5359
5360 for (var i$1 = event.changes.length - 1; i$1 >= 0; --i$1) {
5361 var returned = loop( i$1 );
5362
5363 if ( returned ) return returned.v;
5364 }
5365 }
5366
5367 // Sub-views need their line numbers shifted when text is added
5368 // above or below them in the parent document.
5369 function shiftDoc(doc, distance) {
5370 if (distance == 0) { return }
5371 doc.first += distance;
5372 doc.sel = new Selection(map(doc.sel.ranges, function (range) { return new Range(
5373 Pos(range.anchor.line + distance, range.anchor.ch),
5374 Pos(range.head.line + distance, range.head.ch)
5375 ); }), doc.sel.primIndex);
5376 if (doc.cm) {
5377 regChange(doc.cm, doc.first, doc.first - distance, distance);
5378 for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++)
5379 { regLineChange(doc.cm, l, "gutter"); }
5380 }
5381 }
5382
5383 // More lower-level change function, handling only a single document
5384 // (not linked ones).
5385 function makeChangeSingleDoc(doc, change, selAfter, spans) {
5386 if (doc.cm && !doc.cm.curOp)
5387 { return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans) }
5388
5389 if (change.to.line < doc.first) {
5390 shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
5391 return
5392 }
5393 if (change.from.line > doc.lastLine()) { return }
5394
5395 // Clip the change to the size of this doc
5396 if (change.from.line < doc.first) {
5397 var shift = change.text.length - 1 - (doc.first - change.from.line);
5398 shiftDoc(doc, shift);
5399 change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
5400 text: [lst(change.text)], origin: change.origin};
5401 }
5402 var last = doc.lastLine();
5403 if (change.to.line > last) {
5404 change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
5405 text: [change.text[0]], origin: change.origin};
5406 }
5407
5408 change.removed = getBetween(doc, change.from, change.to);
5409
5410 if (!selAfter) { selAfter = computeSelAfterChange(doc, change); }
5411 if (doc.cm) { makeChangeSingleDocInEditor(doc.cm, change, spans); }
5412 else { updateDoc(doc, change, spans); }
5413 setSelectionNoUndo(doc, selAfter, sel_dontScroll);
5414
5415 if (doc.cantEdit && skipAtomic(doc, Pos(doc.firstLine(), 0)))
5416 { doc.cantEdit = false; }
5417 }
5418
5419 // Handle the interaction of a change to a document with the editor
5420 // that this document is part of.
5421 function makeChangeSingleDocInEditor(cm, change, spans) {
5422 var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
5423
5424 var recomputeMaxLength = false, checkWidthStart = from.line;
5425 if (!cm.options.lineWrapping) {
5426 checkWidthStart = lineNo(visualLine(getLine(doc, from.line)));
5427 doc.iter(checkWidthStart, to.line + 1, function (line) {
5428 if (line == display.maxLine) {
5429 recomputeMaxLength = true;
5430 return true
5431 }
5432 });
5433 }
5434
5435 if (doc.sel.contains(change.from, change.to) > -1)
5436 { signalCursorActivity(cm); }
5437
5438 updateDoc(doc, change, spans, estimateHeight(cm));
5439
5440 if (!cm.options.lineWrapping) {
5441 doc.iter(checkWidthStart, from.line + change.text.length, function (line) {
5442 var len = lineLength(line);
5443 if (len > display.maxLineLength) {
5444 display.maxLine = line;
5445 display.maxLineLength = len;
5446 display.maxLineChanged = true;
5447 recomputeMaxLength = false;
5448 }
5449 });
5450 if (recomputeMaxLength) { cm.curOp.updateMaxLine = true; }
5451 }
5452
5453 retreatFrontier(doc, from.line);
5454 startWorker(cm, 400);
5455
5456 var lendiff = change.text.length - (to.line - from.line) - 1;
5457 // Remember that these lines changed, for updating the display
5458 if (change.full)
5459 { regChange(cm); }
5460 else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change))
5461 { regLineChange(cm, from.line, "text"); }
5462 else
5463 { regChange(cm, from.line, to.line + 1, lendiff); }
5464
5465 var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change");
5466 if (changeHandler || changesHandler) {
5467 var obj = {
5468 from: from, to: to,
5469 text: change.text,
5470 removed: change.removed,
5471 origin: change.origin
5472 };
5473 if (changeHandler) { signalLater(cm, "change", cm, obj); }
5474 if (changesHandler) { (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); }
5475 }
5476 cm.display.selForContextMenu = null;
5477 }
5478
5479 function replaceRange(doc, code, from, to, origin) {
5480 var assign;
5481
5482 if (!to) { to = from; }
5483 if (cmp(to, from) < 0) { (assign = [to, from], from = assign[0], to = assign[1]); }
5484 if (typeof code == "string") { code = doc.splitLines(code); }
5485 makeChange(doc, {from: from, to: to, text: code, origin: origin});
5486 }
5487
5488 // Rebasing/resetting history to deal with externally-sourced changes
5489
5490 function rebaseHistSelSingle(pos, from, to, diff) {
5491 if (to < pos.line) {
5492 pos.line += diff;
5493 } else if (from < pos.line) {
5494 pos.line = from;
5495 pos.ch = 0;
5496 }
5497 }
5498
5499 // Tries to rebase an array of history events given a change in the
5500 // document. If the change touches the same lines as the event, the
5501 // event, and everything 'behind' it, is discarded. If the change is
5502 // before the event, the event's positions are updated. Uses a
5503 // copy-on-write scheme for the positions, to avoid having to
5504 // reallocate them all on every rebase, but also avoid problems with
5505 // shared position objects being unsafely updated.
5506 function rebaseHistArray(array, from, to, diff) {
5507 for (var i = 0; i < array.length; ++i) {
5508 var sub = array[i], ok = true;
5509 if (sub.ranges) {
5510 if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; }
5511 for (var j = 0; j < sub.ranges.length; j++) {
5512 rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff);
5513 rebaseHistSelSingle(sub.ranges[j].head, from, to, diff);
5514 }
5515 continue
5516 }
5517 for (var j$1 = 0; j$1 < sub.changes.length; ++j$1) {
5518 var cur = sub.changes[j$1];
5519 if (to < cur.from.line) {
5520 cur.from = Pos(cur.from.line + diff, cur.from.ch);
5521 cur.to = Pos(cur.to.line + diff, cur.to.ch);
5522 } else if (from <= cur.to.line) {
5523 ok = false;
5524 break
5525 }
5526 }
5527 if (!ok) {
5528 array.splice(0, i + 1);
5529 i = 0;
5530 }
5531 }
5532 }
5533
5534 function rebaseHist(hist, change) {
5535 var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
5536 rebaseHistArray(hist.done, from, to, diff);
5537 rebaseHistArray(hist.undone, from, to, diff);
5538 }
5539
5540 // Utility for applying a change to a line by handle or number,
5541 // returning the number and optionally registering the line as
5542 // changed.
5543 function changeLine(doc, handle, changeType, op) {
5544 var no = handle, line = handle;
5545 if (typeof handle == "number") { line = getLine(doc, clipLine(doc, handle)); }
5546 else { no = lineNo(handle); }
5547 if (no == null) { return null }
5548 if (op(line, no) && doc.cm) { regLineChange(doc.cm, no, changeType); }
5549 return line
5550 }
5551
5552 // The document is represented as a BTree consisting of leaves, with
5553 // chunk of lines in them, and branches, with up to ten leaves or
5554 // other branch nodes below them. The top node is always a branch
5555 // node, and is the document object itself (meaning it has
5556 // additional methods and properties).
5557 //
5558 // All nodes have parent links. The tree is used both to go from
5559 // line numbers to line objects, and to go from objects to numbers.
5560 // It also indexes by height, and is used to convert between height
5561 // and line object, and to find the total height of the document.
5562 //
5563 // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html
5564
5565 function LeafChunk(lines) {
5566 this.lines = lines;
5567 this.parent = null;
5568 var height = 0;
5569 for (var i = 0; i < lines.length; ++i) {
5570 lines[i].parent = this;
5571 height += lines[i].height;
5572 }
5573 this.height = height;
5574 }
5575
5576 LeafChunk.prototype = {
5577 chunkSize: function() { return this.lines.length },
5578
5579 // Remove the n lines at offset 'at'.
5580 removeInner: function(at, n) {
5581 for (var i = at, e = at + n; i < e; ++i) {
5582 var line = this.lines[i];
5583 this.height -= line.height;
5584 cleanUpLine(line);
5585 signalLater(line, "delete");
5586 }
5587 this.lines.splice(at, n);
5588 },
5589
5590 // Helper used to collapse a small branch into a single leaf.
5591 collapse: function(lines) {
5592 lines.push.apply(lines, this.lines);
5593 },
5594
5595 // Insert the given array of lines at offset 'at', count them as
5596 // having the given height.
5597 insertInner: function(at, lines, height) {
5598 this.height += height;
5599 this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
5600 for (var i = 0; i < lines.length; ++i) { lines[i].parent = this; }
5601 },
5602
5603 // Used to iterate over a part of the tree.
5604 iterN: function(at, n, op) {
5605 for (var e = at + n; at < e; ++at)
5606 { if (op(this.lines[at])) { return true } }
5607 }
5608 };
5609
5610 function BranchChunk(children) {
5611 this.children = children;
5612 var size = 0, height = 0;
5613 for (var i = 0; i < children.length; ++i) {
5614 var ch = children[i];
5615 size += ch.chunkSize(); height += ch.height;
5616 ch.parent = this;
5617 }
5618 this.size = size;
5619 this.height = height;
5620 this.parent = null;
5621 }
5622
5623 BranchChunk.prototype = {
5624 chunkSize: function() { return this.size },
5625
5626 removeInner: function(at, n) {
5627 this.size -= n;
5628 for (var i = 0; i < this.children.length; ++i) {
5629 var child = this.children[i], sz = child.chunkSize();
5630 if (at < sz) {
5631 var rm = Math.min(n, sz - at), oldHeight = child.height;
5632 child.removeInner(at, rm);
5633 this.height -= oldHeight - child.height;
5634 if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
5635 if ((n -= rm) == 0) { break }
5636 at = 0;
5637 } else { at -= sz; }
5638 }
5639 // If the result is smaller than 25 lines, ensure that it is a
5640 // single leaf node.
5641 if (this.size - n < 25 &&
5642 (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) {
5643 var lines = [];
5644 this.collapse(lines);
5645 this.children = [new LeafChunk(lines)];
5646 this.children[0].parent = this;
5647 }
5648 },
5649
5650 collapse: function(lines) {
5651 for (var i = 0; i < this.children.length; ++i) { this.children[i].collapse(lines); }
5652 },
5653
5654 insertInner: function(at, lines, height) {
5655 this.size += lines.length;
5656 this.height += height;
5657 for (var i = 0; i < this.children.length; ++i) {
5658 var child = this.children[i], sz = child.chunkSize();
5659 if (at <= sz) {
5660 child.insertInner(at, lines, height);
5661 if (child.lines && child.lines.length > 50) {
5662 // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced.
5663 // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest.
5664 var remaining = child.lines.length % 25 + 25;
5665 for (var pos = remaining; pos < child.lines.length;) {
5666 var leaf = new LeafChunk(child.lines.slice(pos, pos += 25));
5667 child.height -= leaf.height;
5668 this.children.splice(++i, 0, leaf);
5669 leaf.parent = this;
5670 }
5671 child.lines = child.lines.slice(0, remaining);
5672 this.maybeSpill();
5673 }
5674 break
5675 }
5676 at -= sz;
5677 }
5678 },
5679
5680 // When a node has grown, check whether it should be split.
5681 maybeSpill: function() {
5682 if (this.children.length <= 10) { return }
5683 var me = this;
5684 do {
5685 var spilled = me.children.splice(me.children.length - 5, 5);
5686 var sibling = new BranchChunk(spilled);
5687 if (!me.parent) { // Become the parent node
5688 var copy = new BranchChunk(me.children);
5689 copy.parent = me;
5690 me.children = [copy, sibling];
5691 me = copy;
5692 } else {
5693 me.size -= sibling.size;
5694 me.height -= sibling.height;
5695 var myIndex = indexOf(me.parent.children, me);
5696 me.parent.children.splice(myIndex + 1, 0, sibling);
5697 }
5698 sibling.parent = me.parent;
5699 } while (me.children.length > 10)
5700 me.parent.maybeSpill();
5701 },
5702
5703 iterN: function(at, n, op) {
5704 for (var i = 0; i < this.children.length; ++i) {
5705 var child = this.children[i], sz = child.chunkSize();
5706 if (at < sz) {
5707 var used = Math.min(n, sz - at);
5708 if (child.iterN(at, used, op)) { return true }
5709 if ((n -= used) == 0) { break }
5710 at = 0;
5711 } else { at -= sz; }
5712 }
5713 }
5714 };
5715
5716 // Line widgets are block elements displayed above or below a line.
5717
5718 var LineWidget = function(doc, node, options) {
5719 if (options) { for (var opt in options) { if (options.hasOwnProperty(opt))
5720 { this[opt] = options[opt]; } } }
5721 this.doc = doc;
5722 this.node = node;
5723 };
5724
5725 LineWidget.prototype.clear = function () {
5726 var cm = this.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line);
5727 if (no == null || !ws) { return }
5728 for (var i = 0; i < ws.length; ++i) { if (ws[i] == this) { ws.splice(i--, 1); } }
5729 if (!ws.length) { line.widgets = null; }
5730 var height = widgetHeight(this);
5731 updateLineHeight(line, Math.max(0, line.height - height));
5732 if (cm) {
5733 runInOp(cm, function () {
5734 adjustScrollWhenAboveVisible(cm, line, -height);
5735 regLineChange(cm, no, "widget");
5736 });
5737 signalLater(cm, "lineWidgetCleared", cm, this, no);
5738 }
5739 };
5740
5741 LineWidget.prototype.changed = function () {
5742 var this$1 = this;
5743
5744 var oldH = this.height, cm = this.doc.cm, line = this.line;
5745 this.height = null;
5746 var diff = widgetHeight(this) - oldH;
5747 if (!diff) { return }
5748 if (!lineIsHidden(this.doc, line)) { updateLineHeight(line, line.height + diff); }
5749 if (cm) {
5750 runInOp(cm, function () {
5751 cm.curOp.forceUpdate = true;
5752 adjustScrollWhenAboveVisible(cm, line, diff);
5753 signalLater(cm, "lineWidgetChanged", cm, this$1, lineNo(line));
5754 });
5755 }
5756 };
5757 eventMixin(LineWidget);
5758
5759 function adjustScrollWhenAboveVisible(cm, line, diff) {
5760 if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop))
5761 { addToScrollTop(cm, diff); }
5762 }
5763
5764 function addLineWidget(doc, handle, node, options) {
5765 var widget = new LineWidget(doc, node, options);
5766 var cm = doc.cm;
5767 if (cm && widget.noHScroll) { cm.display.alignWidgets = true; }
5768 changeLine(doc, handle, "widget", function (line) {
5769 var widgets = line.widgets || (line.widgets = []);
5770 if (widget.insertAt == null) { widgets.push(widget); }
5771 else { widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); }
5772 widget.line = line;
5773 if (cm && !lineIsHidden(doc, line)) {
5774 var aboveVisible = heightAtLine(line) < doc.scrollTop;
5775 updateLineHeight(line, line.height + widgetHeight(widget));
5776 if (aboveVisible) { addToScrollTop(cm, widget.height); }
5777 cm.curOp.forceUpdate = true;
5778 }
5779 return true
5780 });
5781 if (cm) { signalLater(cm, "lineWidgetAdded", cm, widget, typeof handle == "number" ? handle : lineNo(handle)); }
5782 return widget
5783 }
5784
5785 // TEXTMARKERS
5786
5787 // Created with markText and setBookmark methods. A TextMarker is a
5788 // handle that can be used to clear or find a marked position in the
5789 // document. Line objects hold arrays (markedSpans) containing
5790 // {from, to, marker} object pointing to such marker objects, and
5791 // indicating that such a marker is present on that line. Multiple
5792 // lines may point to the same marker when it spans across lines.
5793 // The spans will have null for their from/to properties when the
5794 // marker continues beyond the start/end of the line. Markers have
5795 // links back to the lines they currently touch.
5796
5797 // Collapsed markers have unique ids, in order to be able to order
5798 // them, which is needed for uniquely determining an outer marker
5799 // when they overlap (they may nest, but not partially overlap).
5800 var nextMarkerId = 0;
5801
5802 var TextMarker = function(doc, type) {
5803 this.lines = [];
5804 this.type = type;
5805 this.doc = doc;
5806 this.id = ++nextMarkerId;
5807 };
5808
5809 // Clear the marker.
5810 TextMarker.prototype.clear = function () {
5811 if (this.explicitlyCleared) { return }
5812 var cm = this.doc.cm, withOp = cm && !cm.curOp;
5813 if (withOp) { startOperation(cm); }
5814 if (hasHandler(this, "clear")) {
5815 var found = this.find();
5816 if (found) { signalLater(this, "clear", found.from, found.to); }
5817 }
5818 var min = null, max = null;
5819 for (var i = 0; i < this.lines.length; ++i) {
5820 var line = this.lines[i];
5821 var span = getMarkedSpanFor(line.markedSpans, this);
5822 if (cm && !this.collapsed) { regLineChange(cm, lineNo(line), "text"); }
5823 else if (cm) {
5824 if (span.to != null) { max = lineNo(line); }
5825 if (span.from != null) { min = lineNo(line); }
5826 }
5827 line.markedSpans = removeMarkedSpan(line.markedSpans, span);
5828 if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm)
5829 { updateLineHeight(line, textHeight(cm.display)); }
5830 }
5831 if (cm && this.collapsed && !cm.options.lineWrapping) { for (var i$1 = 0; i$1 < this.lines.length; ++i$1) {
5832 var visual = visualLine(this.lines[i$1]), len = lineLength(visual);
5833 if (len > cm.display.maxLineLength) {
5834 cm.display.maxLine = visual;
5835 cm.display.maxLineLength = len;
5836 cm.display.maxLineChanged = true;
5837 }
5838 } }
5839
5840 if (min != null && cm && this.collapsed) { regChange(cm, min, max + 1); }
5841 this.lines.length = 0;
5842 this.explicitlyCleared = true;
5843 if (this.atomic && this.doc.cantEdit) {
5844 this.doc.cantEdit = false;
5845 if (cm) { reCheckSelection(cm.doc); }
5846 }
5847 if (cm) { signalLater(cm, "markerCleared", cm, this, min, max); }
5848 if (withOp) { endOperation(cm); }
5849 if (this.parent) { this.parent.clear(); }
5850 };
5851
5852 // Find the position of the marker in the document. Returns a {from,
5853 // to} object by default. Side can be passed to get a specific side
5854 // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the
5855 // Pos objects returned contain a line object, rather than a line
5856 // number (used to prevent looking up the same line twice).
5857 TextMarker.prototype.find = function (side, lineObj) {
5858 if (side == null && this.type == "bookmark") { side = 1; }
5859 var from, to;
5860 for (var i = 0; i < this.lines.length; ++i) {
5861 var line = this.lines[i];
5862 var span = getMarkedSpanFor(line.markedSpans, this);
5863 if (span.from != null) {
5864 from = Pos(lineObj ? line : lineNo(line), span.from);
5865 if (side == -1) { return from }
5866 }
5867 if (span.to != null) {
5868 to = Pos(lineObj ? line : lineNo(line), span.to);
5869 if (side == 1) { return to }
5870 }
5871 }
5872 return from && {from: from, to: to}
5873 };
5874
5875 // Signals that the marker's widget changed, and surrounding layout
5876 // should be recomputed.
5877 TextMarker.prototype.changed = function () {
5878 var this$1 = this;
5879
5880 var pos = this.find(-1, true), widget = this, cm = this.doc.cm;
5881 if (!pos || !cm) { return }
5882 runInOp(cm, function () {
5883 var line = pos.line, lineN = lineNo(pos.line);
5884 var view = findViewForLine(cm, lineN);
5885 if (view) {
5886 clearLineMeasurementCacheFor(view);
5887 cm.curOp.selectionChanged = cm.curOp.forceUpdate = true;
5888 }
5889 cm.curOp.updateMaxLine = true;
5890 if (!lineIsHidden(widget.doc, line) && widget.height != null) {
5891 var oldHeight = widget.height;
5892 widget.height = null;
5893 var dHeight = widgetHeight(widget) - oldHeight;
5894 if (dHeight)
5895 { updateLineHeight(line, line.height + dHeight); }
5896 }
5897 signalLater(cm, "markerChanged", cm, this$1);
5898 });
5899 };
5900
5901 TextMarker.prototype.attachLine = function (line) {
5902 if (!this.lines.length && this.doc.cm) {
5903 var op = this.doc.cm.curOp;
5904 if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
5905 { (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); }
5906 }
5907 this.lines.push(line);
5908 };
5909
5910 TextMarker.prototype.detachLine = function (line) {
5911 this.lines.splice(indexOf(this.lines, line), 1);
5912 if (!this.lines.length && this.doc.cm) {
5913 var op = this.doc.cm.curOp
5914 ;(op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
5915 }
5916 };
5917 eventMixin(TextMarker);
5918
5919 // Create a marker, wire it up to the right lines, and
5920 function markText(doc, from, to, options, type) {
5921 // Shared markers (across linked documents) are handled separately
5922 // (markTextShared will call out to this again, once per
5923 // document).
5924 if (options && options.shared) { return markTextShared(doc, from, to, options, type) }
5925 // Ensure we are in an operation.
5926 if (doc.cm && !doc.cm.curOp) { return operation(doc.cm, markText)(doc, from, to, options, type) }
5927
5928 var marker = new TextMarker(doc, type), diff = cmp(from, to);
5929 if (options) { copyObj(options, marker, false); }
5930 // Don't connect empty markers unless clearWhenEmpty is false
5931 if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false)
5932 { return marker }
5933 if (marker.replacedWith) {
5934 // Showing up as a widget implies collapsed (widget replaces text)
5935 marker.collapsed = true;
5936 marker.widgetNode = eltP("span", [marker.replacedWith], "CodeMirror-widget");
5937 if (!options.handleMouseEvents) { marker.widgetNode.setAttribute("cm-ignore-events", "true"); }
5938 if (options.insertLeft) { marker.widgetNode.insertLeft = true; }
5939 }
5940 if (marker.collapsed) {
5941 if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
5942 from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
5943 { throw new Error("Inserting collapsed marker partially overlapping an existing one") }
5944 seeCollapsedSpans();
5945 }
5946
5947 if (marker.addToHistory)
5948 { addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); }
5949
5950 var curLine = from.line, cm = doc.cm, updateMaxLine;
5951 doc.iter(curLine, to.line + 1, function (line) {
5952 if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine)
5953 { updateMaxLine = true; }
5954 if (marker.collapsed && curLine != from.line) { updateLineHeight(line, 0); }
5955 addMarkedSpan(line, new MarkedSpan(marker,
5956 curLine == from.line ? from.ch : null,
5957 curLine == to.line ? to.ch : null));
5958 ++curLine;
5959 });
5960 // lineIsHidden depends on the presence of the spans, so needs a second pass
5961 if (marker.collapsed) { doc.iter(from.line, to.line + 1, function (line) {
5962 if (lineIsHidden(doc, line)) { updateLineHeight(line, 0); }
5963 }); }
5964
5965 if (marker.clearOnEnter) { on(marker, "beforeCursorEnter", function () { return marker.clear(); }); }
5966
5967 if (marker.readOnly) {
5968 seeReadOnlySpans();
5969 if (doc.history.done.length || doc.history.undone.length)
5970 { doc.clearHistory(); }
5971 }
5972 if (marker.collapsed) {
5973 marker.id = ++nextMarkerId;
5974 marker.atomic = true;
5975 }
5976 if (cm) {
5977 // Sync editor state
5978 if (updateMaxLine) { cm.curOp.updateMaxLine = true; }
5979 if (marker.collapsed)
5980 { regChange(cm, from.line, to.line + 1); }
5981 else if (marker.className || marker.startStyle || marker.endStyle || marker.css ||
5982 marker.attributes || marker.title)
5983 { for (var i = from.line; i <= to.line; i++) { regLineChange(cm, i, "text"); } }
5984 if (marker.atomic) { reCheckSelection(cm.doc); }
5985 signalLater(cm, "markerAdded", cm, marker);
5986 }
5987 return marker
5988 }
5989
5990 // SHARED TEXTMARKERS
5991
5992 // A shared marker spans multiple linked documents. It is
5993 // implemented as a meta-marker-object controlling multiple normal
5994 // markers.
5995 var SharedTextMarker = function(markers, primary) {
5996 this.markers = markers;
5997 this.primary = primary;
5998 for (var i = 0; i < markers.length; ++i)
5999 { markers[i].parent = this; }
6000 };
6001
6002 SharedTextMarker.prototype.clear = function () {
6003 if (this.explicitlyCleared) { return }
6004 this.explicitlyCleared = true;
6005 for (var i = 0; i < this.markers.length; ++i)
6006 { this.markers[i].clear(); }
6007 signalLater(this, "clear");
6008 };
6009
6010 SharedTextMarker.prototype.find = function (side, lineObj) {
6011 return this.primary.find(side, lineObj)
6012 };
6013 eventMixin(SharedTextMarker);
6014
6015 function markTextShared(doc, from, to, options, type) {
6016 options = copyObj(options);
6017 options.shared = false;
6018 var markers = [markText(doc, from, to, options, type)], primary = markers[0];
6019 var widget = options.widgetNode;
6020 linkedDocs(doc, function (doc) {
6021 if (widget) { options.widgetNode = widget.cloneNode(true); }
6022 markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
6023 for (var i = 0; i < doc.linked.length; ++i)
6024 { if (doc.linked[i].isParent) { return } }
6025 primary = lst(markers);
6026 });
6027 return new SharedTextMarker(markers, primary)
6028 }
6029
6030 function findSharedMarkers(doc) {
6031 return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), function (m) { return m.parent; })
6032 }
6033
6034 function copySharedMarkers(doc, markers) {
6035 for (var i = 0; i < markers.length; i++) {
6036 var marker = markers[i], pos = marker.find();
6037 var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to);
6038 if (cmp(mFrom, mTo)) {
6039 var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type);
6040 marker.markers.push(subMark);
6041 subMark.parent = marker;
6042 }
6043 }
6044 }
6045
6046 function detachSharedMarkers(markers) {
6047 var loop = function ( i ) {
6048 var marker = markers[i], linked = [marker.primary.doc];
6049 linkedDocs(marker.primary.doc, function (d) { return linked.push(d); });
6050 for (var j = 0; j < marker.markers.length; j++) {
6051 var subMarker = marker.markers[j];
6052 if (indexOf(linked, subMarker.doc) == -1) {
6053 subMarker.parent = null;
6054 marker.markers.splice(j--, 1);
6055 }
6056 }
6057 };
6058
6059 for (var i = 0; i < markers.length; i++) loop( i );
6060 }
6061
6062 var nextDocId = 0;
6063 var Doc = function(text, mode, firstLine, lineSep, direction) {
6064 if (!(this instanceof Doc)) { return new Doc(text, mode, firstLine, lineSep, direction) }
6065 if (firstLine == null) { firstLine = 0; }
6066
6067 BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
6068 this.first = firstLine;
6069 this.scrollTop = this.scrollLeft = 0;
6070 this.cantEdit = false;
6071 this.cleanGeneration = 1;
6072 this.modeFrontier = this.highlightFrontier = firstLine;
6073 var start = Pos(firstLine, 0);
6074 this.sel = simpleSelection(start);
6075 this.history = new History(null);
6076 this.id = ++nextDocId;
6077 this.modeOption = mode;
6078 this.lineSep = lineSep;
6079 this.direction = (direction == "rtl") ? "rtl" : "ltr";
6080 this.extend = false;
6081
6082 if (typeof text == "string") { text = this.splitLines(text); }
6083 updateDoc(this, {from: start, to: start, text: text});
6084 setSelection(this, simpleSelection(start), sel_dontScroll);
6085 };
6086
6087 Doc.prototype = createObj(BranchChunk.prototype, {
6088 constructor: Doc,
6089 // Iterate over the document. Supports two forms -- with only one
6090 // argument, it calls that for each line in the document. With
6091 // three, it iterates over the range given by the first two (with
6092 // the second being non-inclusive).
6093 iter: function(from, to, op) {
6094 if (op) { this.iterN(from - this.first, to - from, op); }
6095 else { this.iterN(this.first, this.first + this.size, from); }
6096 },
6097
6098 // Non-public interface for adding and removing lines.
6099 insert: function(at, lines) {
6100 var height = 0;
6101 for (var i = 0; i < lines.length; ++i) { height += lines[i].height; }
6102 this.insertInner(at - this.first, lines, height);
6103 },
6104 remove: function(at, n) { this.removeInner(at - this.first, n); },
6105
6106 // From here, the methods are part of the public interface. Most
6107 // are also available from CodeMirror (editor) instances.
6108
6109 getValue: function(lineSep) {
6110 var lines = getLines(this, this.first, this.first + this.size);
6111 if (lineSep === false) { return lines }
6112 return lines.join(lineSep || this.lineSeparator())
6113 },
6114 setValue: docMethodOp(function(code) {
6115 var top = Pos(this.first, 0), last = this.first + this.size - 1;
6116 makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
6117 text: this.splitLines(code), origin: "setValue", full: true}, true);
6118 if (this.cm) { scrollToCoords(this.cm, 0, 0); }
6119 setSelection(this, simpleSelection(top), sel_dontScroll);
6120 }),
6121 replaceRange: function(code, from, to, origin) {
6122 from = clipPos(this, from);
6123 to = to ? clipPos(this, to) : from;
6124 replaceRange(this, code, from, to, origin);
6125 },
6126 getRange: function(from, to, lineSep) {
6127 var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
6128 if (lineSep === false) { return lines }
6129 return lines.join(lineSep || this.lineSeparator())
6130 },
6131
6132 getLine: function(line) {var l = this.getLineHandle(line); return l && l.text},
6133
6134 getLineHandle: function(line) {if (isLine(this, line)) { return getLine(this, line) }},
6135 getLineNumber: function(line) {return lineNo(line)},
6136
6137 getLineHandleVisualStart: function(line) {
6138 if (typeof line == "number") { line = getLine(this, line); }
6139 return visualLine(line)
6140 },
6141
6142 lineCount: function() {return this.size},
6143 firstLine: function() {return this.first},
6144 lastLine: function() {return this.first + this.size - 1},
6145
6146 clipPos: function(pos) {return clipPos(this, pos)},
6147
6148 getCursor: function(start) {
6149 var range = this.sel.primary(), pos;
6150 if (start == null || start == "head") { pos = range.head; }
6151 else if (start == "anchor") { pos = range.anchor; }
6152 else if (start == "end" || start == "to" || start === false) { pos = range.to(); }
6153 else { pos = range.from(); }
6154 return pos
6155 },
6156 listSelections: function() { return this.sel.ranges },
6157 somethingSelected: function() {return this.sel.somethingSelected()},
6158
6159 setCursor: docMethodOp(function(line, ch, options) {
6160 setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options);
6161 }),
6162 setSelection: docMethodOp(function(anchor, head, options) {
6163 setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options);
6164 }),
6165 extendSelection: docMethodOp(function(head, other, options) {
6166 extendSelection(this, clipPos(this, head), other && clipPos(this, other), options);
6167 }),
6168 extendSelections: docMethodOp(function(heads, options) {
6169 extendSelections(this, clipPosArray(this, heads), options);
6170 }),
6171 extendSelectionsBy: docMethodOp(function(f, options) {
6172 var heads = map(this.sel.ranges, f);
6173 extendSelections(this, clipPosArray(this, heads), options);
6174 }),
6175 setSelections: docMethodOp(function(ranges, primary, options) {
6176 if (!ranges.length) { return }
6177 var out = [];
6178 for (var i = 0; i < ranges.length; i++)
6179 { out[i] = new Range(clipPos(this, ranges[i].anchor),
6180 clipPos(this, ranges[i].head)); }
6181 if (primary == null) { primary = Math.min(ranges.length - 1, this.sel.primIndex); }
6182 setSelection(this, normalizeSelection(this.cm, out, primary), options);
6183 }),
6184 addSelection: docMethodOp(function(anchor, head, options) {
6185 var ranges = this.sel.ranges.slice(0);
6186 ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)));
6187 setSelection(this, normalizeSelection(this.cm, ranges, ranges.length - 1), options);
6188 }),
6189
6190 getSelection: function(lineSep) {
6191 var ranges = this.sel.ranges, lines;
6192 for (var i = 0; i < ranges.length; i++) {
6193 var sel = getBetween(this, ranges[i].from(), ranges[i].to());
6194 lines = lines ? lines.concat(sel) : sel;
6195 }
6196 if (lineSep === false) { return lines }
6197 else { return lines.join(lineSep || this.lineSeparator()) }
6198 },
6199 getSelections: function(lineSep) {
6200 var parts = [], ranges = this.sel.ranges;
6201 for (var i = 0; i < ranges.length; i++) {
6202 var sel = getBetween(this, ranges[i].from(), ranges[i].to());
6203 if (lineSep !== false) { sel = sel.join(lineSep || this.lineSeparator()); }
6204 parts[i] = sel;
6205 }
6206 return parts
6207 },
6208 replaceSelection: function(code, collapse, origin) {
6209 var dup = [];
6210 for (var i = 0; i < this.sel.ranges.length; i++)
6211 { dup[i] = code; }
6212 this.replaceSelections(dup, collapse, origin || "+input");
6213 },
6214 replaceSelections: docMethodOp(function(code, collapse, origin) {
6215 var changes = [], sel = this.sel;
6216 for (var i = 0; i < sel.ranges.length; i++) {
6217 var range = sel.ranges[i];
6218 changes[i] = {from: range.from(), to: range.to(), text: this.splitLines(code[i]), origin: origin};
6219 }
6220 var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse);
6221 for (var i$1 = changes.length - 1; i$1 >= 0; i$1--)
6222 { makeChange(this, changes[i$1]); }
6223 if (newSel) { setSelectionReplaceHistory(this, newSel); }
6224 else if (this.cm) { ensureCursorVisible(this.cm); }
6225 }),
6226 undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}),
6227 redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}),
6228 undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}),
6229 redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}),
6230
6231 setExtending: function(val) {this.extend = val;},
6232 getExtending: function() {return this.extend},
6233
6234 historySize: function() {
6235 var hist = this.history, done = 0, undone = 0;
6236 for (var i = 0; i < hist.done.length; i++) { if (!hist.done[i].ranges) { ++done; } }
6237 for (var i$1 = 0; i$1 < hist.undone.length; i$1++) { if (!hist.undone[i$1].ranges) { ++undone; } }
6238 return {undo: done, redo: undone}
6239 },
6240 clearHistory: function() {
6241 var this$1 = this;
6242
6243 this.history = new History(this.history.maxGeneration);
6244 linkedDocs(this, function (doc) { return doc.history = this$1.history; }, true);
6245 },
6246
6247 markClean: function() {
6248 this.cleanGeneration = this.changeGeneration(true);
6249 },
6250 changeGeneration: function(forceSplit) {
6251 if (forceSplit)
6252 { this.history.lastOp = this.history.lastSelOp = this.history.lastOrigin = null; }
6253 return this.history.generation
6254 },
6255 isClean: function (gen) {
6256 return this.history.generation == (gen || this.cleanGeneration)
6257 },
6258
6259 getHistory: function() {
6260 return {done: copyHistoryArray(this.history.done),
6261 undone: copyHistoryArray(this.history.undone)}
6262 },
6263 setHistory: function(histData) {
6264 var hist = this.history = new History(this.history.maxGeneration);
6265 hist.done = copyHistoryArray(histData.done.slice(0), null, true);
6266 hist.undone = copyHistoryArray(histData.undone.slice(0), null, true);
6267 },
6268
6269 setGutterMarker: docMethodOp(function(line, gutterID, value) {
6270 return changeLine(this, line, "gutter", function (line) {
6271 var markers = line.gutterMarkers || (line.gutterMarkers = {});
6272 markers[gutterID] = value;
6273 if (!value && isEmpty(markers)) { line.gutterMarkers = null; }
6274 return true
6275 })
6276 }),
6277
6278 clearGutter: docMethodOp(function(gutterID) {
6279 var this$1 = this;
6280
6281 this.iter(function (line) {
6282 if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
6283 changeLine(this$1, line, "gutter", function () {
6284 line.gutterMarkers[gutterID] = null;
6285 if (isEmpty(line.gutterMarkers)) { line.gutterMarkers = null; }
6286 return true
6287 });
6288 }
6289 });
6290 }),
6291
6292 lineInfo: function(line) {
6293 var n;
6294 if (typeof line == "number") {
6295 if (!isLine(this, line)) { return null }
6296 n = line;
6297 line = getLine(this, line);
6298 if (!line) { return null }
6299 } else {
6300 n = lineNo(line);
6301 if (n == null) { return null }
6302 }
6303 return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
6304 textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
6305 widgets: line.widgets}
6306 },
6307
6308 addLineClass: docMethodOp(function(handle, where, cls) {
6309 return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
6310 var prop = where == "text" ? "textClass"
6311 : where == "background" ? "bgClass"
6312 : where == "gutter" ? "gutterClass" : "wrapClass";
6313 if (!line[prop]) { line[prop] = cls; }
6314 else if (classTest(cls).test(line[prop])) { return false }
6315 else { line[prop] += " " + cls; }
6316 return true
6317 })
6318 }),
6319 removeLineClass: docMethodOp(function(handle, where, cls) {
6320 return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function (line) {
6321 var prop = where == "text" ? "textClass"
6322 : where == "background" ? "bgClass"
6323 : where == "gutter" ? "gutterClass" : "wrapClass";
6324 var cur = line[prop];
6325 if (!cur) { return false }
6326 else if (cls == null) { line[prop] = null; }
6327 else {
6328 var found = cur.match(classTest(cls));
6329 if (!found) { return false }
6330 var end = found.index + found[0].length;
6331 line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
6332 }
6333 return true
6334 })
6335 }),
6336
6337 addLineWidget: docMethodOp(function(handle, node, options) {
6338 return addLineWidget(this, handle, node, options)
6339 }),
6340 removeLineWidget: function(widget) { widget.clear(); },
6341
6342 markText: function(from, to, options) {
6343 return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range")
6344 },
6345 setBookmark: function(pos, options) {
6346 var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
6347 insertLeft: options && options.insertLeft,
6348 clearWhenEmpty: false, shared: options && options.shared,
6349 handleMouseEvents: options && options.handleMouseEvents};
6350 pos = clipPos(this, pos);
6351 return markText(this, pos, pos, realOpts, "bookmark")
6352 },
6353 findMarksAt: function(pos) {
6354 pos = clipPos(this, pos);
6355 var markers = [], spans = getLine(this, pos.line).markedSpans;
6356 if (spans) { for (var i = 0; i < spans.length; ++i) {
6357 var span = spans[i];
6358 if ((span.from == null || span.from <= pos.ch) &&
6359 (span.to == null || span.to >= pos.ch))
6360 { markers.push(span.marker.parent || span.marker); }
6361 } }
6362 return markers
6363 },
6364 findMarks: function(from, to, filter) {
6365 from = clipPos(this, from); to = clipPos(this, to);
6366 var found = [], lineNo = from.line;
6367 this.iter(from.line, to.line + 1, function (line) {
6368 var spans = line.markedSpans;
6369 if (spans) { for (var i = 0; i < spans.length; i++) {
6370 var span = spans[i];
6371 if (!(span.to != null && lineNo == from.line && from.ch >= span.to ||
6372 span.from == null && lineNo != from.line ||
6373 span.from != null && lineNo == to.line && span.from >= to.ch) &&
6374 (!filter || filter(span.marker)))
6375 { found.push(span.marker.parent || span.marker); }
6376 } }
6377 ++lineNo;
6378 });
6379 return found
6380 },
6381 getAllMarks: function() {
6382 var markers = [];
6383 this.iter(function (line) {
6384 var sps = line.markedSpans;
6385 if (sps) { for (var i = 0; i < sps.length; ++i)
6386 { if (sps[i].from != null) { markers.push(sps[i].marker); } } }
6387 });
6388 return markers
6389 },
6390
6391 posFromIndex: function(off) {
6392 var ch, lineNo = this.first, sepSize = this.lineSeparator().length;
6393 this.iter(function (line) {
6394 var sz = line.text.length + sepSize;
6395 if (sz > off) { ch = off; return true }
6396 off -= sz;
6397 ++lineNo;
6398 });
6399 return clipPos(this, Pos(lineNo, ch))
6400 },
6401 indexFromPos: function (coords) {
6402 coords = clipPos(this, coords);
6403 var index = coords.ch;
6404 if (coords.line < this.first || coords.ch < 0) { return 0 }
6405 var sepSize = this.lineSeparator().length;
6406 this.iter(this.first, coords.line, function (line) { // iter aborts when callback returns a truthy value
6407 index += line.text.length + sepSize;
6408 });
6409 return index
6410 },
6411
6412 copy: function(copyHistory) {
6413 var doc = new Doc(getLines(this, this.first, this.first + this.size),
6414 this.modeOption, this.first, this.lineSep, this.direction);
6415 doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
6416 doc.sel = this.sel;
6417 doc.extend = false;
6418 if (copyHistory) {
6419 doc.history.undoDepth = this.history.undoDepth;
6420 doc.setHistory(this.getHistory());
6421 }
6422 return doc
6423 },
6424
6425 linkedDoc: function(options) {
6426 if (!options) { options = {}; }
6427 var from = this.first, to = this.first + this.size;
6428 if (options.from != null && options.from > from) { from = options.from; }
6429 if (options.to != null && options.to < to) { to = options.to; }
6430 var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep, this.direction);
6431 if (options.sharedHist) { copy.history = this.history
6432 ; }(this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
6433 copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
6434 copySharedMarkers(copy, findSharedMarkers(this));
6435 return copy
6436 },
6437 unlinkDoc: function(other) {
6438 if (other instanceof CodeMirror) { other = other.doc; }
6439 if (this.linked) { for (var i = 0; i < this.linked.length; ++i) {
6440 var link = this.linked[i];
6441 if (link.doc != other) { continue }
6442 this.linked.splice(i, 1);
6443 other.unlinkDoc(this);
6444 detachSharedMarkers(findSharedMarkers(this));
6445 break
6446 } }
6447 // If the histories were shared, split them again
6448 if (other.history == this.history) {
6449 var splitIds = [other.id];
6450 linkedDocs(other, function (doc) { return splitIds.push(doc.id); }, true);
6451 other.history = new History(null);
6452 other.history.done = copyHistoryArray(this.history.done, splitIds);
6453 other.history.undone = copyHistoryArray(this.history.undone, splitIds);
6454 }
6455 },
6456 iterLinkedDocs: function(f) {linkedDocs(this, f);},
6457
6458 getMode: function() {return this.mode},
6459 getEditor: function() {return this.cm},
6460
6461 splitLines: function(str) {
6462 if (this.lineSep) { return str.split(this.lineSep) }
6463 return splitLinesAuto(str)
6464 },
6465 lineSeparator: function() { return this.lineSep || "\n" },
6466
6467 setDirection: docMethodOp(function (dir) {
6468 if (dir != "rtl") { dir = "ltr"; }
6469 if (dir == this.direction) { return }
6470 this.direction = dir;
6471 this.iter(function (line) { return line.order = null; });
6472 if (this.cm) { directionChanged(this.cm); }
6473 })
6474 });
6475
6476 // Public alias.
6477 Doc.prototype.eachLine = Doc.prototype.iter;
6478
6479 // Kludge to work around strange IE behavior where it'll sometimes
6480 // re-fire a series of drag-related events right after the drop (#1551)
6481 var lastDrop = 0;
6482
6483 function onDrop(e) {
6484 var cm = this;
6485 clearDragCursor(cm);
6486 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e))
6487 { return }
6488 e_preventDefault(e);
6489 if (ie) { lastDrop = +new Date; }
6490 var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
6491 if (!pos || cm.isReadOnly()) { return }
6492 // Might be a file drop, in which case we simply extract the text
6493 // and insert it.
6494 if (files && files.length && window.FileReader && window.File) {
6495 var n = files.length, text = Array(n), read = 0;
6496 var markAsReadAndPasteIfAllFilesAreRead = function () {
6497 if (++read == n) {
6498 operation(cm, function () {
6499 pos = clipPos(cm.doc, pos);
6500 var change = {from: pos, to: pos,
6501 text: cm.doc.splitLines(
6502 text.filter(function (t) { return t != null; }).join(cm.doc.lineSeparator())),
6503 origin: "paste"};
6504 makeChange(cm.doc, change);
6505 setSelectionReplaceHistory(cm.doc, simpleSelection(clipPos(cm.doc, pos), clipPos(cm.doc, changeEnd(change))));
6506 })();
6507 }
6508 };
6509 var readTextFromFile = function (file, i) {
6510 if (cm.options.allowDropFileTypes &&
6511 indexOf(cm.options.allowDropFileTypes, file.type) == -1) {
6512 markAsReadAndPasteIfAllFilesAreRead();
6513 return
6514 }
6515 var reader = new FileReader;
6516 reader.onerror = function () { return markAsReadAndPasteIfAllFilesAreRead(); };
6517 reader.onload = function () {
6518 var content = reader.result;
6519 if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) {
6520 markAsReadAndPasteIfAllFilesAreRead();
6521 return
6522 }
6523 text[i] = content;
6524 markAsReadAndPasteIfAllFilesAreRead();
6525 };
6526 reader.readAsText(file);
6527 };
6528 for (var i = 0; i < files.length; i++) { readTextFromFile(files[i], i); }
6529 } else { // Normal drop
6530 // Don't do a replace if the drop happened inside of the selected text.
6531 if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) {
6532 cm.state.draggingText(e);
6533 // Ensure the editor is re-focused
6534 setTimeout(function () { return cm.display.input.focus(); }, 20);
6535 return
6536 }
6537 try {
6538 var text$1 = e.dataTransfer.getData("Text");
6539 if (text$1) {
6540 var selected;
6541 if (cm.state.draggingText && !cm.state.draggingText.copy)
6542 { selected = cm.listSelections(); }
6543 setSelectionNoUndo(cm.doc, simpleSelection(pos, pos));
6544 if (selected) { for (var i$1 = 0; i$1 < selected.length; ++i$1)
6545 { replaceRange(cm.doc, "", selected[i$1].anchor, selected[i$1].head, "drag"); } }
6546 cm.replaceSelection(text$1, "around", "paste");
6547 cm.display.input.focus();
6548 }
6549 }
6550 catch(e$1){}
6551 }
6552 }
6553
6554 function onDragStart(cm, e) {
6555 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return }
6556 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) { return }
6557
6558 e.dataTransfer.setData("Text", cm.getSelection());
6559 e.dataTransfer.effectAllowed = "copyMove";
6560
6561 // Use dummy image instead of default browsers image.
6562 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
6563 if (e.dataTransfer.setDragImage && !safari) {
6564 var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
6565 img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
6566 if (presto) {
6567 img.width = img.height = 1;
6568 cm.display.wrapper.appendChild(img);
6569 // Force a relayout, or Opera won't use our image for some obscure reason
6570 img._top = img.offsetTop;
6571 }
6572 e.dataTransfer.setDragImage(img, 0, 0);
6573 if (presto) { img.parentNode.removeChild(img); }
6574 }
6575 }
6576
6577 function onDragOver(cm, e) {
6578 var pos = posFromMouse(cm, e);
6579 if (!pos) { return }
6580 var frag = document.createDocumentFragment();
6581 drawSelectionCursor(cm, pos, frag);
6582 if (!cm.display.dragCursor) {
6583 cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors");
6584 cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv);
6585 }
6586 removeChildrenAndAdd(cm.display.dragCursor, frag);
6587 }
6588
6589 function clearDragCursor(cm) {
6590 if (cm.display.dragCursor) {
6591 cm.display.lineSpace.removeChild(cm.display.dragCursor);
6592 cm.display.dragCursor = null;
6593 }
6594 }
6595
6596 // These must be handled carefully, because naively registering a
6597 // handler for each editor will cause the editors to never be
6598 // garbage collected.
6599
6600 function forEachCodeMirror(f) {
6601 if (!document.getElementsByClassName) { return }
6602 var byClass = document.getElementsByClassName("CodeMirror"), editors = [];
6603 for (var i = 0; i < byClass.length; i++) {
6604 var cm = byClass[i].CodeMirror;
6605 if (cm) { editors.push(cm); }
6606 }
6607 if (editors.length) { editors[0].operation(function () {
6608 for (var i = 0; i < editors.length; i++) { f(editors[i]); }
6609 }); }
6610 }
6611
6612 var globalsRegistered = false;
6613 function ensureGlobalHandlers() {
6614 if (globalsRegistered) { return }
6615 registerGlobalHandlers();
6616 globalsRegistered = true;
6617 }
6618 function registerGlobalHandlers() {
6619 // When the window resizes, we need to refresh active editors.
6620 var resizeTimer;
6621 on(window, "resize", function () {
6622 if (resizeTimer == null) { resizeTimer = setTimeout(function () {
6623 resizeTimer = null;
6624 forEachCodeMirror(onResize);
6625 }, 100); }
6626 });
6627 // When the window loses focus, we want to show the editor as blurred
6628 on(window, "blur", function () { return forEachCodeMirror(onBlur); });
6629 }
6630 // Called when the window resizes
6631 function onResize(cm) {
6632 var d = cm.display;
6633 // Might be a text scaling operation, clear size caches.
6634 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null;
6635 d.scrollbarsClipped = false;
6636 cm.setSize();
6637 }
6638
6639 var keyNames = {
6640 3: "Pause", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
6641 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
6642 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
6643 46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod",
6644 106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 145: "ScrollLock",
6645 173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
6646 221: "]", 222: "'", 224: "Mod", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
6647 63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"
6648 };
6649
6650 // Number keys
6651 for (var i = 0; i < 10; i++) { keyNames[i + 48] = keyNames[i + 96] = String(i); }
6652 // Alphabetic keys
6653 for (var i$1 = 65; i$1 <= 90; i$1++) { keyNames[i$1] = String.fromCharCode(i$1); }
6654 // Function keys
6655 for (var i$2 = 1; i$2 <= 12; i$2++) { keyNames[i$2 + 111] = keyNames[i$2 + 63235] = "F" + i$2; }
6656
6657 var keyMap = {};
6658
6659 keyMap.basic = {
6660 "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
6661 "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
6662 "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
6663 "Tab": "defaultTab", "Shift-Tab": "indentAuto",
6664 "Enter": "newlineAndIndent", "Insert": "toggleOverwrite",
6665 "Esc": "singleSelection"
6666 };
6667 // Note that the save and find-related commands aren't defined by
6668 // default. User code or addons can define them. Unknown commands
6669 // are simply ignored.
6670 keyMap.pcDefault = {
6671 "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
6672 "Ctrl-Home": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown",
6673 "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
6674 "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
6675 "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
6676 "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
6677 "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection",
6678 "fallthrough": "basic"
6679 };
6680 // Very basic readline/emacs-style bindings, which are standard on Mac.
6681 keyMap.emacsy = {
6682 "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
6683 "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
6684 "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
6685 "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars",
6686 "Ctrl-O": "openLine"
6687 };
6688 keyMap.macDefault = {
6689 "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
6690 "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
6691 "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore",
6692 "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
6693 "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
6694 "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight",
6695 "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd",
6696 "fallthrough": ["basic", "emacsy"]
6697 };
6698 keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
6699
6700 // KEYMAP DISPATCH
6701
6702 function normalizeKeyName(name) {
6703 var parts = name.split(/-(?!$)/);
6704 name = parts[parts.length - 1];
6705 var alt, ctrl, shift, cmd;
6706 for (var i = 0; i < parts.length - 1; i++) {
6707 var mod = parts[i];
6708 if (/^(cmd|meta|m)$/i.test(mod)) { cmd = true; }
6709 else if (/^a(lt)?$/i.test(mod)) { alt = true; }
6710 else if (/^(c|ctrl|control)$/i.test(mod)) { ctrl = true; }
6711 else if (/^s(hift)?$/i.test(mod)) { shift = true; }
6712 else { throw new Error("Unrecognized modifier name: " + mod) }
6713 }
6714 if (alt) { name = "Alt-" + name; }
6715 if (ctrl) { name = "Ctrl-" + name; }
6716 if (cmd) { name = "Cmd-" + name; }
6717 if (shift) { name = "Shift-" + name; }
6718 return name
6719 }
6720
6721 // This is a kludge to keep keymaps mostly working as raw objects
6722 // (backwards compatibility) while at the same time support features
6723 // like normalization and multi-stroke key bindings. It compiles a
6724 // new normalized keymap, and then updates the old object to reflect
6725 // this.
6726 function normalizeKeyMap(keymap) {
6727 var copy = {};
6728 for (var keyname in keymap) { if (keymap.hasOwnProperty(keyname)) {
6729 var value = keymap[keyname];
6730 if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) { continue }
6731 if (value == "...") { delete keymap[keyname]; continue }
6732
6733 var keys = map(keyname.split(" "), normalizeKeyName);
6734 for (var i = 0; i < keys.length; i++) {
6735 var val = (void 0), name = (void 0);
6736 if (i == keys.length - 1) {
6737 name = keys.join(" ");
6738 val = value;
6739 } else {
6740 name = keys.slice(0, i + 1).join(" ");
6741 val = "...";
6742 }
6743 var prev = copy[name];
6744 if (!prev) { copy[name] = val; }
6745 else if (prev != val) { throw new Error("Inconsistent bindings for " + name) }
6746 }
6747 delete keymap[keyname];
6748 } }
6749 for (var prop in copy) { keymap[prop] = copy[prop]; }
6750 return keymap
6751 }
6752
6753 function lookupKey(key, map, handle, context) {
6754 map = getKeyMap(map);
6755 var found = map.call ? map.call(key, context) : map[key];
6756 if (found === false) { return "nothing" }
6757 if (found === "...") { return "multi" }
6758 if (found != null && handle(found)) { return "handled" }
6759
6760 if (map.fallthrough) {
6761 if (Object.prototype.toString.call(map.fallthrough) != "[object Array]")
6762 { return lookupKey(key, map.fallthrough, handle, context) }
6763 for (var i = 0; i < map.fallthrough.length; i++) {
6764 var result = lookupKey(key, map.fallthrough[i], handle, context);
6765 if (result) { return result }
6766 }
6767 }
6768 }
6769
6770 // Modifier key presses don't count as 'real' key presses for the
6771 // purpose of keymap fallthrough.
6772 function isModifierKey(value) {
6773 var name = typeof value == "string" ? value : keyNames[value.keyCode];
6774 return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"
6775 }
6776
6777 function addModifierNames(name, event, noShift) {
6778 var base = name;
6779 if (event.altKey && base != "Alt") { name = "Alt-" + name; }
6780 if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") { name = "Ctrl-" + name; }
6781 if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Mod") { name = "Cmd-" + name; }
6782 if (!noShift && event.shiftKey && base != "Shift") { name = "Shift-" + name; }
6783 return name
6784 }
6785
6786 // Look up the name of a key as indicated by an event object.
6787 function keyName(event, noShift) {
6788 if (presto && event.keyCode == 34 && event["char"]) { return false }
6789 var name = keyNames[event.keyCode];
6790 if (name == null || event.altGraphKey) { return false }
6791 // Ctrl-ScrollLock has keyCode 3, same as Ctrl-Pause,
6792 // so we'll use event.code when available (Chrome 48+, FF 38+, Safari 10.1+)
6793 if (event.keyCode == 3 && event.code) { name = event.code; }
6794 return addModifierNames(name, event, noShift)
6795 }
6796
6797 function getKeyMap(val) {
6798 return typeof val == "string" ? keyMap[val] : val
6799 }
6800
6801 // Helper for deleting text near the selection(s), used to implement
6802 // backspace, delete, and similar functionality.
6803 function deleteNearSelection(cm, compute) {
6804 var ranges = cm.doc.sel.ranges, kill = [];
6805 // Build up a set of ranges to kill first, merging overlapping
6806 // ranges.
6807 for (var i = 0; i < ranges.length; i++) {
6808 var toKill = compute(ranges[i]);
6809 while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) {
6810 var replaced = kill.pop();
6811 if (cmp(replaced.from, toKill.from) < 0) {
6812 toKill.from = replaced.from;
6813 break
6814 }
6815 }
6816 kill.push(toKill);
6817 }
6818 // Next, remove those actual ranges.
6819 runInOp(cm, function () {
6820 for (var i = kill.length - 1; i >= 0; i--)
6821 { replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); }
6822 ensureCursorVisible(cm);
6823 });
6824 }
6825
6826 function moveCharLogically(line, ch, dir) {
6827 var target = skipExtendingChars(line.text, ch + dir, dir);
6828 return target < 0 || target > line.text.length ? null : target
6829 }
6830
6831 function moveLogically(line, start, dir) {
6832 var ch = moveCharLogically(line, start.ch, dir);
6833 return ch == null ? null : new Pos(start.line, ch, dir < 0 ? "after" : "before")
6834 }
6835
6836 function endOfLine(visually, cm, lineObj, lineNo, dir) {
6837 if (visually) {
6838 if (cm.doc.direction == "rtl") { dir = -dir; }
6839 var order = getOrder(lineObj, cm.doc.direction);
6840 if (order) {
6841 var part = dir < 0 ? lst(order) : order[0];
6842 var moveInStorageOrder = (dir < 0) == (part.level == 1);
6843 var sticky = moveInStorageOrder ? "after" : "before";
6844 var ch;
6845 // With a wrapped rtl chunk (possibly spanning multiple bidi parts),
6846 // it could be that the last bidi part is not on the last visual line,
6847 // since visual lines contain content order-consecutive chunks.
6848 // Thus, in rtl, we are looking for the first (content-order) character
6849 // in the rtl chunk that is on the last line (that is, the same line
6850 // as the last (content-order) character).
6851 if (part.level > 0 || cm.doc.direction == "rtl") {
6852 var prep = prepareMeasureForLine(cm, lineObj);
6853 ch = dir < 0 ? lineObj.text.length - 1 : 0;
6854 var targetTop = measureCharPrepared(cm, prep, ch).top;
6855 ch = findFirst(function (ch) { return measureCharPrepared(cm, prep, ch).top == targetTop; }, (dir < 0) == (part.level == 1) ? part.from : part.to - 1, ch);
6856 if (sticky == "before") { ch = moveCharLogically(lineObj, ch, 1); }
6857 } else { ch = dir < 0 ? part.to : part.from; }
6858 return new Pos(lineNo, ch, sticky)
6859 }
6860 }
6861 return new Pos(lineNo, dir < 0 ? lineObj.text.length : 0, dir < 0 ? "before" : "after")
6862 }
6863
6864 function moveVisually(cm, line, start, dir) {
6865 var bidi = getOrder(line, cm.doc.direction);
6866 if (!bidi) { return moveLogically(line, start, dir) }
6867 if (start.ch >= line.text.length) {
6868 start.ch = line.text.length;
6869 start.sticky = "before";
6870 } else if (start.ch <= 0) {
6871 start.ch = 0;
6872 start.sticky = "after";
6873 }
6874 var partPos = getBidiPartAt(bidi, start.ch, start.sticky), part = bidi[partPos];
6875 if (cm.doc.direction == "ltr" && part.level % 2 == 0 && (dir > 0 ? part.to > start.ch : part.from < start.ch)) {
6876 // Case 1: We move within an ltr part in an ltr editor. Even with wrapped lines,
6877 // nothing interesting happens.
6878 return moveLogically(line, start, dir)
6879 }
6880
6881 var mv = function (pos, dir) { return moveCharLogically(line, pos instanceof Pos ? pos.ch : pos, dir); };
6882 var prep;
6883 var getWrappedLineExtent = function (ch) {
6884 if (!cm.options.lineWrapping) { return {begin: 0, end: line.text.length} }
6885 prep = prep || prepareMeasureForLine(cm, line);
6886 return wrappedLineExtentChar(cm, line, prep, ch)
6887 };
6888 var wrappedLineExtent = getWrappedLineExtent(start.sticky == "before" ? mv(start, -1) : start.ch);
6889
6890 if (cm.doc.direction == "rtl" || part.level == 1) {
6891 var moveInStorageOrder = (part.level == 1) == (dir < 0);
6892 var ch = mv(start, moveInStorageOrder ? 1 : -1);
6893 if (ch != null && (!moveInStorageOrder ? ch >= part.from && ch >= wrappedLineExtent.begin : ch <= part.to && ch <= wrappedLineExtent.end)) {
6894 // Case 2: We move within an rtl part or in an rtl editor on the same visual line
6895 var sticky = moveInStorageOrder ? "before" : "after";
6896 return new Pos(start.line, ch, sticky)
6897 }
6898 }
6899
6900 // Case 3: Could not move within this bidi part in this visual line, so leave
6901 // the current bidi part
6902
6903 var searchInVisualLine = function (partPos, dir, wrappedLineExtent) {
6904 var getRes = function (ch, moveInStorageOrder) { return moveInStorageOrder
6905 ? new Pos(start.line, mv(ch, 1), "before")
6906 : new Pos(start.line, ch, "after"); };
6907
6908 for (; partPos >= 0 && partPos < bidi.length; partPos += dir) {
6909 var part = bidi[partPos];
6910 var moveInStorageOrder = (dir > 0) == (part.level != 1);
6911 var ch = moveInStorageOrder ? wrappedLineExtent.begin : mv(wrappedLineExtent.end, -1);
6912 if (part.from <= ch && ch < part.to) { return getRes(ch, moveInStorageOrder) }
6913 ch = moveInStorageOrder ? part.from : mv(part.to, -1);
6914 if (wrappedLineExtent.begin <= ch && ch < wrappedLineExtent.end) { return getRes(ch, moveInStorageOrder) }
6915 }
6916 };
6917
6918 // Case 3a: Look for other bidi parts on the same visual line
6919 var res = searchInVisualLine(partPos + dir, dir, wrappedLineExtent);
6920 if (res) { return res }
6921
6922 // Case 3b: Look for other bidi parts on the next visual line
6923 var nextCh = dir > 0 ? wrappedLineExtent.end : mv(wrappedLineExtent.begin, -1);
6924 if (nextCh != null && !(dir > 0 && nextCh == line.text.length)) {
6925 res = searchInVisualLine(dir > 0 ? 0 : bidi.length - 1, dir, getWrappedLineExtent(nextCh));
6926 if (res) { return res }
6927 }
6928
6929 // Case 4: Nowhere to move
6930 return null
6931 }
6932
6933 // Commands are parameter-less actions that can be performed on an
6934 // editor, mostly used for keybindings.
6935 var commands = {
6936 selectAll: selectAll,
6937 singleSelection: function (cm) { return cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); },
6938 killLine: function (cm) { return deleteNearSelection(cm, function (range) {
6939 if (range.empty()) {
6940 var len = getLine(cm.doc, range.head.line).text.length;
6941 if (range.head.ch == len && range.head.line < cm.lastLine())
6942 { return {from: range.head, to: Pos(range.head.line + 1, 0)} }
6943 else
6944 { return {from: range.head, to: Pos(range.head.line, len)} }
6945 } else {
6946 return {from: range.from(), to: range.to()}
6947 }
6948 }); },
6949 deleteLine: function (cm) { return deleteNearSelection(cm, function (range) { return ({
6950 from: Pos(range.from().line, 0),
6951 to: clipPos(cm.doc, Pos(range.to().line + 1, 0))
6952 }); }); },
6953 delLineLeft: function (cm) { return deleteNearSelection(cm, function (range) { return ({
6954 from: Pos(range.from().line, 0), to: range.from()
6955 }); }); },
6956 delWrappedLineLeft: function (cm) { return deleteNearSelection(cm, function (range) {
6957 var top = cm.charCoords(range.head, "div").top + 5;
6958 var leftPos = cm.coordsChar({left: 0, top: top}, "div");
6959 return {from: leftPos, to: range.from()}
6960 }); },
6961 delWrappedLineRight: function (cm) { return deleteNearSelection(cm, function (range) {
6962 var top = cm.charCoords(range.head, "div").top + 5;
6963 var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div");
6964 return {from: range.from(), to: rightPos }
6965 }); },
6966 undo: function (cm) { return cm.undo(); },
6967 redo: function (cm) { return cm.redo(); },
6968 undoSelection: function (cm) { return cm.undoSelection(); },
6969 redoSelection: function (cm) { return cm.redoSelection(); },
6970 goDocStart: function (cm) { return cm.extendSelection(Pos(cm.firstLine(), 0)); },
6971 goDocEnd: function (cm) { return cm.extendSelection(Pos(cm.lastLine())); },
6972 goLineStart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStart(cm, range.head.line); },
6973 {origin: "+move", bias: 1}
6974 ); },
6975 goLineStartSmart: function (cm) { return cm.extendSelectionsBy(function (range) { return lineStartSmart(cm, range.head); },
6976 {origin: "+move", bias: 1}
6977 ); },
6978 goLineEnd: function (cm) { return cm.extendSelectionsBy(function (range) { return lineEnd(cm, range.head.line); },
6979 {origin: "+move", bias: -1}
6980 ); },
6981 goLineRight: function (cm) { return cm.extendSelectionsBy(function (range) {
6982 var top = cm.cursorCoords(range.head, "div").top + 5;
6983 return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div")
6984 }, sel_move); },
6985 goLineLeft: function (cm) { return cm.extendSelectionsBy(function (range) {
6986 var top = cm.cursorCoords(range.head, "div").top + 5;
6987 return cm.coordsChar({left: 0, top: top}, "div")
6988 }, sel_move); },
6989 goLineLeftSmart: function (cm) { return cm.extendSelectionsBy(function (range) {
6990 var top = cm.cursorCoords(range.head, "div").top + 5;
6991 var pos = cm.coordsChar({left: 0, top: top}, "div");
6992 if (pos.ch < cm.getLine(pos.line).search(/\S/)) { return lineStartSmart(cm, range.head) }
6993 return pos
6994 }, sel_move); },
6995 goLineUp: function (cm) { return cm.moveV(-1, "line"); },
6996 goLineDown: function (cm) { return cm.moveV(1, "line"); },
6997 goPageUp: function (cm) { return cm.moveV(-1, "page"); },
6998 goPageDown: function (cm) { return cm.moveV(1, "page"); },
6999 goCharLeft: function (cm) { return cm.moveH(-1, "char"); },
7000 goCharRight: function (cm) { return cm.moveH(1, "char"); },
7001 goColumnLeft: function (cm) { return cm.moveH(-1, "column"); },
7002 goColumnRight: function (cm) { return cm.moveH(1, "column"); },
7003 goWordLeft: function (cm) { return cm.moveH(-1, "word"); },
7004 goGroupRight: function (cm) { return cm.moveH(1, "group"); },
7005 goGroupLeft: function (cm) { return cm.moveH(-1, "group"); },
7006 goWordRight: function (cm) { return cm.moveH(1, "word"); },
7007 delCharBefore: function (cm) { return cm.deleteH(-1, "codepoint"); },
7008 delCharAfter: function (cm) { return cm.deleteH(1, "char"); },
7009 delWordBefore: function (cm) { return cm.deleteH(-1, "word"); },
7010 delWordAfter: function (cm) { return cm.deleteH(1, "word"); },
7011 delGroupBefore: function (cm) { return cm.deleteH(-1, "group"); },
7012 delGroupAfter: function (cm) { return cm.deleteH(1, "group"); },
7013 indentAuto: function (cm) { return cm.indentSelection("smart"); },
7014 indentMore: function (cm) { return cm.indentSelection("add"); },
7015 indentLess: function (cm) { return cm.indentSelection("subtract"); },
7016 insertTab: function (cm) { return cm.replaceSelection("\t"); },
7017 insertSoftTab: function (cm) {
7018 var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize;
7019 for (var i = 0; i < ranges.length; i++) {
7020 var pos = ranges[i].from();
7021 var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize);
7022 spaces.push(spaceStr(tabSize - col % tabSize));
7023 }
7024 cm.replaceSelections(spaces);
7025 },
7026 defaultTab: function (cm) {
7027 if (cm.somethingSelected()) { cm.indentSelection("add"); }
7028 else { cm.execCommand("insertTab"); }
7029 },
7030 // Swap the two chars left and right of each selection's head.
7031 // Move cursor behind the two swapped characters afterwards.
7032 //
7033 // Doesn't consider line feeds a character.
7034 // Doesn't scan more than one line above to find a character.
7035 // Doesn't do anything on an empty line.
7036 // Doesn't do anything with non-empty selections.
7037 transposeChars: function (cm) { return runInOp(cm, function () {
7038 var ranges = cm.listSelections(), newSel = [];
7039 for (var i = 0; i < ranges.length; i++) {
7040 if (!ranges[i].empty()) { continue }
7041 var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text;
7042 if (line) {
7043 if (cur.ch == line.length) { cur = new Pos(cur.line, cur.ch - 1); }
7044 if (cur.ch > 0) {
7045 cur = new Pos(cur.line, cur.ch + 1);
7046 cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2),
7047 Pos(cur.line, cur.ch - 2), cur, "+transpose");
7048 } else if (cur.line > cm.doc.first) {
7049 var prev = getLine(cm.doc, cur.line - 1).text;
7050 if (prev) {
7051 cur = new Pos(cur.line, 1);
7052 cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() +
7053 prev.charAt(prev.length - 1),
7054 Pos(cur.line - 1, prev.length - 1), cur, "+transpose");
7055 }
7056 }
7057 }
7058 newSel.push(new Range(cur, cur));
7059 }
7060 cm.setSelections(newSel);
7061 }); },
7062 newlineAndIndent: function (cm) { return runInOp(cm, function () {
7063 var sels = cm.listSelections();
7064 for (var i = sels.length - 1; i >= 0; i--)
7065 { cm.replaceRange(cm.doc.lineSeparator(), sels[i].anchor, sels[i].head, "+input"); }
7066 sels = cm.listSelections();
7067 for (var i$1 = 0; i$1 < sels.length; i$1++)
7068 { cm.indentLine(sels[i$1].from().line, null, true); }
7069 ensureCursorVisible(cm);
7070 }); },
7071 openLine: function (cm) { return cm.replaceSelection("\n", "start"); },
7072 toggleOverwrite: function (cm) { return cm.toggleOverwrite(); }
7073 };
7074
7075
7076 function lineStart(cm, lineN) {
7077 var line = getLine(cm.doc, lineN);
7078 var visual = visualLine(line);
7079 if (visual != line) { lineN = lineNo(visual); }
7080 return endOfLine(true, cm, visual, lineN, 1)
7081 }
7082 function lineEnd(cm, lineN) {
7083 var line = getLine(cm.doc, lineN);
7084 var visual = visualLineEnd(line);
7085 if (visual != line) { lineN = lineNo(visual); }
7086 return endOfLine(true, cm, line, lineN, -1)
7087 }
7088 function lineStartSmart(cm, pos) {
7089 var start = lineStart(cm, pos.line);
7090 var line = getLine(cm.doc, start.line);
7091 var order = getOrder(line, cm.doc.direction);
7092 if (!order || order[0].level == 0) {
7093 var firstNonWS = Math.max(start.ch, line.text.search(/\S/));
7094 var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch;
7095 return Pos(start.line, inWS ? 0 : firstNonWS, start.sticky)
7096 }
7097 return start
7098 }
7099
7100 // Run a handler that was bound to a key.
7101 function doHandleBinding(cm, bound, dropShift) {
7102 if (typeof bound == "string") {
7103 bound = commands[bound];
7104 if (!bound) { return false }
7105 }
7106 // Ensure previous input has been read, so that the handler sees a
7107 // consistent view of the document
7108 cm.display.input.ensurePolled();
7109 var prevShift = cm.display.shift, done = false;
7110 try {
7111 if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
7112 if (dropShift) { cm.display.shift = false; }
7113 done = bound(cm) != Pass;
7114 } finally {
7115 cm.display.shift = prevShift;
7116 cm.state.suppressEdits = false;
7117 }
7118 return done
7119 }
7120
7121 function lookupKeyForEditor(cm, name, handle) {
7122 for (var i = 0; i < cm.state.keyMaps.length; i++) {
7123 var result = lookupKey(name, cm.state.keyMaps[i], handle, cm);
7124 if (result) { return result }
7125 }
7126 return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm))
7127 || lookupKey(name, cm.options.keyMap, handle, cm)
7128 }
7129
7130 // Note that, despite the name, this function is also used to check
7131 // for bound mouse clicks.
7132
7133 var stopSeq = new Delayed;
7134
7135 function dispatchKey(cm, name, e, handle) {
7136 var seq = cm.state.keySeq;
7137 if (seq) {
7138 if (isModifierKey(name)) { return "handled" }
7139 if (/\'$/.test(name))
7140 { cm.state.keySeq = null; }
7141 else
7142 { stopSeq.set(50, function () {
7143 if (cm.state.keySeq == seq) {
7144 cm.state.keySeq = null;
7145 cm.display.input.reset();
7146 }
7147 }); }
7148 if (dispatchKeyInner(cm, seq + " " + name, e, handle)) { return true }
7149 }
7150 return dispatchKeyInner(cm, name, e, handle)
7151 }
7152
7153 function dispatchKeyInner(cm, name, e, handle) {
7154 var result = lookupKeyForEditor(cm, name, handle);
7155
7156 if (result == "multi")
7157 { cm.state.keySeq = name; }
7158 if (result == "handled")
7159 { signalLater(cm, "keyHandled", cm, name, e); }
7160
7161 if (result == "handled" || result == "multi") {
7162 e_preventDefault(e);
7163 restartBlink(cm);
7164 }
7165
7166 return !!result
7167 }
7168
7169 // Handle a key from the keydown event.
7170 function handleKeyBinding(cm, e) {
7171 var name = keyName(e, true);
7172 if (!name) { return false }
7173
7174 if (e.shiftKey && !cm.state.keySeq) {
7175 // First try to resolve full name (including 'Shift-'). Failing
7176 // that, see if there is a cursor-motion command (starting with
7177 // 'go') bound to the keyname without 'Shift-'.
7178 return dispatchKey(cm, "Shift-" + name, e, function (b) { return doHandleBinding(cm, b, true); })
7179 || dispatchKey(cm, name, e, function (b) {
7180 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
7181 { return doHandleBinding(cm, b) }
7182 })
7183 } else {
7184 return dispatchKey(cm, name, e, function (b) { return doHandleBinding(cm, b); })
7185 }
7186 }
7187
7188 // Handle a key from the keypress event
7189 function handleCharBinding(cm, e, ch) {
7190 return dispatchKey(cm, "'" + ch + "'", e, function (b) { return doHandleBinding(cm, b, true); })
7191 }
7192
7193 var lastStoppedKey = null;
7194 function onKeyDown(e) {
7195 var cm = this;
7196 if (e.target && e.target != cm.display.input.getField()) { return }
7197 cm.curOp.focus = activeElt();
7198 if (signalDOMEvent(cm, e)) { return }
7199 // IE does strange things with escape.
7200 if (ie && ie_version < 11 && e.keyCode == 27) { e.returnValue = false; }
7201 var code = e.keyCode;
7202 cm.display.shift = code == 16 || e.shiftKey;
7203 var handled = handleKeyBinding(cm, e);
7204 if (presto) {
7205 lastStoppedKey = handled ? code : null;
7206 // Opera has no cut event... we try to at least catch the key combo
7207 if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
7208 { cm.replaceSelection("", null, "cut"); }
7209 }
7210 if (gecko && !mac && !handled && code == 46 && e.shiftKey && !e.ctrlKey && document.execCommand)
7211 { document.execCommand("cut"); }
7212
7213 // Turn mouse into crosshair when Alt is held on Mac.
7214 if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className))
7215 { showCrossHair(cm); }
7216 }
7217
7218 function showCrossHair(cm) {
7219 var lineDiv = cm.display.lineDiv;
7220 addClass(lineDiv, "CodeMirror-crosshair");
7221
7222 function up(e) {
7223 if (e.keyCode == 18 || !e.altKey) {
7224 rmClass(lineDiv, "CodeMirror-crosshair");
7225 off(document, "keyup", up);
7226 off(document, "mouseover", up);
7227 }
7228 }
7229 on(document, "keyup", up);
7230 on(document, "mouseover", up);
7231 }
7232
7233 function onKeyUp(e) {
7234 if (e.keyCode == 16) { this.doc.sel.shift = false; }
7235 signalDOMEvent(this, e);
7236 }
7237
7238 function onKeyPress(e) {
7239 var cm = this;
7240 if (e.target && e.target != cm.display.input.getField()) { return }
7241 if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) { return }
7242 var keyCode = e.keyCode, charCode = e.charCode;
7243 if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return}
7244 if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) { return }
7245 var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
7246 // Some browsers fire keypress events for backspace
7247 if (ch == "\x08") { return }
7248 if (handleCharBinding(cm, e, ch)) { return }
7249 cm.display.input.onKeyPress(e);
7250 }
7251
7252 var DOUBLECLICK_DELAY = 400;
7253
7254 var PastClick = function(time, pos, button) {
7255 this.time = time;
7256 this.pos = pos;
7257 this.button = button;
7258 };
7259
7260 PastClick.prototype.compare = function (time, pos, button) {
7261 return this.time + DOUBLECLICK_DELAY > time &&
7262 cmp(pos, this.pos) == 0 && button == this.button
7263 };
7264
7265 var lastClick, lastDoubleClick;
7266 function clickRepeat(pos, button) {
7267 var now = +new Date;
7268 if (lastDoubleClick && lastDoubleClick.compare(now, pos, button)) {
7269 lastClick = lastDoubleClick = null;
7270 return "triple"
7271 } else if (lastClick && lastClick.compare(now, pos, button)) {
7272 lastDoubleClick = new PastClick(now, pos, button);
7273 lastClick = null;
7274 return "double"
7275 } else {
7276 lastClick = new PastClick(now, pos, button);
7277 lastDoubleClick = null;
7278 return "single"
7279 }
7280 }
7281
7282 // A mouse down can be a single click, double click, triple click,
7283 // start of selection drag, start of text drag, new cursor
7284 // (ctrl-click), rectangle drag (alt-drag), or xwin
7285 // middle-click-paste. Or it might be a click on something we should
7286 // not interfere with, such as a scrollbar or widget.
7287 function onMouseDown(e) {
7288 var cm = this, display = cm.display;
7289 if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) { return }
7290 display.input.ensurePolled();
7291 display.shift = e.shiftKey;
7292
7293 if (eventInWidget(display, e)) {
7294 if (!webkit) {
7295 // Briefly turn off draggability, to allow widgets to do
7296 // normal dragging things.
7297 display.scroller.draggable = false;
7298 setTimeout(function () { return display.scroller.draggable = true; }, 100);
7299 }
7300 return
7301 }
7302 if (clickInGutter(cm, e)) { return }
7303 var pos = posFromMouse(cm, e), button = e_button(e), repeat = pos ? clickRepeat(pos, button) : "single";
7304 window.focus();
7305
7306 // #3261: make sure, that we're not starting a second selection
7307 if (button == 1 && cm.state.selectingText)
7308 { cm.state.selectingText(e); }
7309
7310 if (pos && handleMappedButton(cm, button, pos, repeat, e)) { return }
7311
7312 if (button == 1) {
7313 if (pos) { leftButtonDown(cm, pos, repeat, e); }
7314 else if (e_target(e) == display.scroller) { e_preventDefault(e); }
7315 } else if (button == 2) {
7316 if (pos) { extendSelection(cm.doc, pos); }
7317 setTimeout(function () { return display.input.focus(); }, 20);
7318 } else if (button == 3) {
7319 if (captureRightClick) { cm.display.input.onContextMenu(e); }
7320 else { delayBlurEvent(cm); }
7321 }
7322 }
7323
7324 function handleMappedButton(cm, button, pos, repeat, event) {
7325 var name = "Click";
7326 if (repeat == "double") { name = "Double" + name; }
7327 else if (repeat == "triple") { name = "Triple" + name; }
7328 name = (button == 1 ? "Left" : button == 2 ? "Middle" : "Right") + name;
7329
7330 return dispatchKey(cm, addModifierNames(name, event), event, function (bound) {
7331 if (typeof bound == "string") { bound = commands[bound]; }
7332 if (!bound) { return false }
7333 var done = false;
7334 try {
7335 if (cm.isReadOnly()) { cm.state.suppressEdits = true; }
7336 done = bound(cm, pos) != Pass;
7337 } finally {
7338 cm.state.suppressEdits = false;
7339 }
7340 return done
7341 })
7342 }
7343
7344 function configureMouse(cm, repeat, event) {
7345 var option = cm.getOption("configureMouse");
7346 var value = option ? option(cm, repeat, event) : {};
7347 if (value.unit == null) {
7348 var rect = chromeOS ? event.shiftKey && event.metaKey : event.altKey;
7349 value.unit = rect ? "rectangle" : repeat == "single" ? "char" : repeat == "double" ? "word" : "line";
7350 }
7351 if (value.extend == null || cm.doc.extend) { value.extend = cm.doc.extend || event.shiftKey; }
7352 if (value.addNew == null) { value.addNew = mac ? event.metaKey : event.ctrlKey; }
7353 if (value.moveOnDrag == null) { value.moveOnDrag = !(mac ? event.altKey : event.ctrlKey); }
7354 return value
7355 }
7356
7357 function leftButtonDown(cm, pos, repeat, event) {
7358 if (ie) { setTimeout(bind(ensureFocus, cm), 0); }
7359 else { cm.curOp.focus = activeElt(); }
7360
7361 var behavior = configureMouse(cm, repeat, event);
7362
7363 var sel = cm.doc.sel, contained;
7364 if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() &&
7365 repeat == "single" && (contained = sel.contains(pos)) > -1 &&
7366 (cmp((contained = sel.ranges[contained]).from(), pos) < 0 || pos.xRel > 0) &&
7367 (cmp(contained.to(), pos) > 0 || pos.xRel < 0))
7368 { leftButtonStartDrag(cm, event, pos, behavior); }
7369 else
7370 { leftButtonSelect(cm, event, pos, behavior); }
7371 }
7372
7373 // Start a text drag. When it ends, see if any dragging actually
7374 // happen, and treat as a click if it didn't.
7375 function leftButtonStartDrag(cm, event, pos, behavior) {
7376 var display = cm.display, moved = false;
7377 var dragEnd = operation(cm, function (e) {
7378 if (webkit) { display.scroller.draggable = false; }
7379 cm.state.draggingText = false;
7380 off(display.wrapper.ownerDocument, "mouseup", dragEnd);
7381 off(display.wrapper.ownerDocument, "mousemove", mouseMove);
7382 off(display.scroller, "dragstart", dragStart);
7383 off(display.scroller, "drop", dragEnd);
7384 if (!moved) {
7385 e_preventDefault(e);
7386 if (!behavior.addNew)
7387 { extendSelection(cm.doc, pos, null, null, behavior.extend); }
7388 // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081)
7389 if ((webkit && !safari) || ie && ie_version == 9)
7390 { setTimeout(function () {display.wrapper.ownerDocument.body.focus({preventScroll: true}); display.input.focus();}, 20); }
7391 else
7392 { display.input.focus(); }
7393 }
7394 });
7395 var mouseMove = function(e2) {
7396 moved = moved || Math.abs(event.clientX - e2.clientX) + Math.abs(event.clientY - e2.clientY) >= 10;
7397 };
7398 var dragStart = function () { return moved = true; };
7399 // Let the drag handler handle this.
7400 if (webkit) { display.scroller.draggable = true; }
7401 cm.state.draggingText = dragEnd;
7402 dragEnd.copy = !behavior.moveOnDrag;
7403 // IE's approach to draggable
7404 if (display.scroller.dragDrop) { display.scroller.dragDrop(); }
7405 on(display.wrapper.ownerDocument, "mouseup", dragEnd);
7406 on(display.wrapper.ownerDocument, "mousemove", mouseMove);
7407 on(display.scroller, "dragstart", dragStart);
7408 on(display.scroller, "drop", dragEnd);
7409
7410 delayBlurEvent(cm);
7411 setTimeout(function () { return display.input.focus(); }, 20);
7412 }
7413
7414 function rangeForUnit(cm, pos, unit) {
7415 if (unit == "char") { return new Range(pos, pos) }
7416 if (unit == "word") { return cm.findWordAt(pos) }
7417 if (unit == "line") { return new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))) }
7418 var result = unit(cm, pos);
7419 return new Range(result.from, result.to)
7420 }
7421
7422 // Normal selection, as opposed to text dragging.
7423 function leftButtonSelect(cm, event, start, behavior) {
7424 var display = cm.display, doc = cm.doc;
7425 e_preventDefault(event);
7426
7427 var ourRange, ourIndex, startSel = doc.sel, ranges = startSel.ranges;
7428 if (behavior.addNew && !behavior.extend) {
7429 ourIndex = doc.sel.contains(start);
7430 if (ourIndex > -1)
7431 { ourRange = ranges[ourIndex]; }
7432 else
7433 { ourRange = new Range(start, start); }
7434 } else {
7435 ourRange = doc.sel.primary();
7436 ourIndex = doc.sel.primIndex;
7437 }
7438
7439 if (behavior.unit == "rectangle") {
7440 if (!behavior.addNew) { ourRange = new Range(start, start); }
7441 start = posFromMouse(cm, event, true, true);
7442 ourIndex = -1;
7443 } else {
7444 var range = rangeForUnit(cm, start, behavior.unit);
7445 if (behavior.extend)
7446 { ourRange = extendRange(ourRange, range.anchor, range.head, behavior.extend); }
7447 else
7448 { ourRange = range; }
7449 }
7450
7451 if (!behavior.addNew) {
7452 ourIndex = 0;
7453 setSelection(doc, new Selection([ourRange], 0), sel_mouse);
7454 startSel = doc.sel;
7455 } else if (ourIndex == -1) {
7456 ourIndex = ranges.length;
7457 setSelection(doc, normalizeSelection(cm, ranges.concat([ourRange]), ourIndex),
7458 {scroll: false, origin: "*mouse"});
7459 } else if (ranges.length > 1 && ranges[ourIndex].empty() && behavior.unit == "char" && !behavior.extend) {
7460 setSelection(doc, normalizeSelection(cm, ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0),
7461 {scroll: false, origin: "*mouse"});
7462 startSel = doc.sel;
7463 } else {
7464 replaceOneSelection(doc, ourIndex, ourRange, sel_mouse);
7465 }
7466
7467 var lastPos = start;
7468 function extendTo(pos) {
7469 if (cmp(lastPos, pos) == 0) { return }
7470 lastPos = pos;
7471
7472 if (behavior.unit == "rectangle") {
7473 var ranges = [], tabSize = cm.options.tabSize;
7474 var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize);
7475 var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize);
7476 var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol);
7477 for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line));
7478 line <= end; line++) {
7479 var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize);
7480 if (left == right)
7481 { ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); }
7482 else if (text.length > leftPos)
7483 { ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); }
7484 }
7485 if (!ranges.length) { ranges.push(new Range(start, start)); }
7486 setSelection(doc, normalizeSelection(cm, startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex),
7487 {origin: "*mouse", scroll: false});
7488 cm.scrollIntoView(pos);
7489 } else {
7490 var oldRange = ourRange;
7491 var range = rangeForUnit(cm, pos, behavior.unit);
7492 var anchor = oldRange.anchor, head;
7493 if (cmp(range.anchor, anchor) > 0) {
7494 head = range.head;
7495 anchor = minPos(oldRange.from(), range.anchor);
7496 } else {
7497 head = range.anchor;
7498 anchor = maxPos(oldRange.to(), range.head);
7499 }
7500 var ranges$1 = startSel.ranges.slice(0);
7501 ranges$1[ourIndex] = bidiSimplify(cm, new Range(clipPos(doc, anchor), head));
7502 setSelection(doc, normalizeSelection(cm, ranges$1, ourIndex), sel_mouse);
7503 }
7504 }
7505
7506 var editorSize = display.wrapper.getBoundingClientRect();
7507 // Used to ensure timeout re-tries don't fire when another extend
7508 // happened in the meantime (clearTimeout isn't reliable -- at
7509 // least on Chrome, the timeouts still happen even when cleared,
7510 // if the clear happens after their scheduled firing time).
7511 var counter = 0;
7512
7513 function extend(e) {
7514 var curCount = ++counter;
7515 var cur = posFromMouse(cm, e, true, behavior.unit == "rectangle");
7516 if (!cur) { return }
7517 if (cmp(cur, lastPos) != 0) {
7518 cm.curOp.focus = activeElt();
7519 extendTo(cur);
7520 var visible = visibleLines(display, doc);
7521 if (cur.line >= visible.to || cur.line < visible.from)
7522 { setTimeout(operation(cm, function () {if (counter == curCount) { extend(e); }}), 150); }
7523 } else {
7524 var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
7525 if (outside) { setTimeout(operation(cm, function () {
7526 if (counter != curCount) { return }
7527 display.scroller.scrollTop += outside;
7528 extend(e);
7529 }), 50); }
7530 }
7531 }
7532
7533 function done(e) {
7534 cm.state.selectingText = false;
7535 counter = Infinity;
7536 // If e is null or undefined we interpret this as someone trying
7537 // to explicitly cancel the selection rather than the user
7538 // letting go of the mouse button.
7539 if (e) {
7540 e_preventDefault(e);
7541 display.input.focus();
7542 }
7543 off(display.wrapper.ownerDocument, "mousemove", move);
7544 off(display.wrapper.ownerDocument, "mouseup", up);
7545 doc.history.lastSelOrigin = null;
7546 }
7547
7548 var move = operation(cm, function (e) {
7549 if (e.buttons === 0 || !e_button(e)) { done(e); }
7550 else { extend(e); }
7551 });
7552 var up = operation(cm, done);
7553 cm.state.selectingText = up;
7554 on(display.wrapper.ownerDocument, "mousemove", move);
7555 on(display.wrapper.ownerDocument, "mouseup", up);
7556 }
7557
7558 // Used when mouse-selecting to adjust the anchor to the proper side
7559 // of a bidi jump depending on the visual position of the head.
7560 function bidiSimplify(cm, range) {
7561 var anchor = range.anchor;
7562 var head = range.head;
7563 var anchorLine = getLine(cm.doc, anchor.line);
7564 if (cmp(anchor, head) == 0 && anchor.sticky == head.sticky) { return range }
7565 var order = getOrder(anchorLine);
7566 if (!order) { return range }
7567 var index = getBidiPartAt(order, anchor.ch, anchor.sticky), part = order[index];
7568 if (part.from != anchor.ch && part.to != anchor.ch) { return range }
7569 var boundary = index + ((part.from == anchor.ch) == (part.level != 1) ? 0 : 1);
7570 if (boundary == 0 || boundary == order.length) { return range }
7571
7572 // Compute the relative visual position of the head compared to the
7573 // anchor (<0 is to the left, >0 to the right)
7574 var leftSide;
7575 if (head.line != anchor.line) {
7576 leftSide = (head.line - anchor.line) * (cm.doc.direction == "ltr" ? 1 : -1) > 0;
7577 } else {
7578 var headIndex = getBidiPartAt(order, head.ch, head.sticky);
7579 var dir = headIndex - index || (head.ch - anchor.ch) * (part.level == 1 ? -1 : 1);
7580 if (headIndex == boundary - 1 || headIndex == boundary)
7581 { leftSide = dir < 0; }
7582 else
7583 { leftSide = dir > 0; }
7584 }
7585
7586 var usePart = order[boundary + (leftSide ? -1 : 0)];
7587 var from = leftSide == (usePart.level == 1);
7588 var ch = from ? usePart.from : usePart.to, sticky = from ? "after" : "before";
7589 return anchor.ch == ch && anchor.sticky == sticky ? range : new Range(new Pos(anchor.line, ch, sticky), head)
7590 }
7591
7592
7593 // Determines whether an event happened in the gutter, and fires the
7594 // handlers for the corresponding event.
7595 function gutterEvent(cm, e, type, prevent) {
7596 var mX, mY;
7597 if (e.touches) {
7598 mX = e.touches[0].clientX;
7599 mY = e.touches[0].clientY;
7600 } else {
7601 try { mX = e.clientX; mY = e.clientY; }
7602 catch(e$1) { return false }
7603 }
7604 if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) { return false }
7605 if (prevent) { e_preventDefault(e); }
7606
7607 var display = cm.display;
7608 var lineBox = display.lineDiv.getBoundingClientRect();
7609
7610 if (mY > lineBox.bottom || !hasHandler(cm, type)) { return e_defaultPrevented(e) }
7611 mY -= lineBox.top - display.viewOffset;
7612
7613 for (var i = 0; i < cm.display.gutterSpecs.length; ++i) {
7614 var g = display.gutters.childNodes[i];
7615 if (g && g.getBoundingClientRect().right >= mX) {
7616 var line = lineAtHeight(cm.doc, mY);
7617 var gutter = cm.display.gutterSpecs[i];
7618 signal(cm, type, cm, line, gutter.className, e);
7619 return e_defaultPrevented(e)
7620 }
7621 }
7622 }
7623
7624 function clickInGutter(cm, e) {
7625 return gutterEvent(cm, e, "gutterClick", true)
7626 }
7627
7628 // CONTEXT MENU HANDLING
7629
7630 // To make the context menu work, we need to briefly unhide the
7631 // textarea (making it as unobtrusive as possible) to let the
7632 // right-click take effect on it.
7633 function onContextMenu(cm, e) {
7634 if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) { return }
7635 if (signalDOMEvent(cm, e, "contextmenu")) { return }
7636 if (!captureRightClick) { cm.display.input.onContextMenu(e); }
7637 }
7638
7639 function contextMenuInGutter(cm, e) {
7640 if (!hasHandler(cm, "gutterContextMenu")) { return false }
7641 return gutterEvent(cm, e, "gutterContextMenu", false)
7642 }
7643
7644 function themeChanged(cm) {
7645 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
7646 cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
7647 clearCaches(cm);
7648 }
7649
7650 var Init = {toString: function(){return "CodeMirror.Init"}};
7651
7652 var defaults = {};
7653 var optionHandlers = {};
7654
7655 function defineOptions(CodeMirror) {
7656 var optionHandlers = CodeMirror.optionHandlers;
7657
7658 function option(name, deflt, handle, notOnInit) {
7659 CodeMirror.defaults[name] = deflt;
7660 if (handle) { optionHandlers[name] =
7661 notOnInit ? function (cm, val, old) {if (old != Init) { handle(cm, val, old); }} : handle; }
7662 }
7663
7664 CodeMirror.defineOption = option;
7665
7666 // Passed to option handlers when there is no old value.
7667 CodeMirror.Init = Init;
7668
7669 // These two are, on init, called from the constructor because they
7670 // have to be initialized before the editor can start at all.
7671 option("value", "", function (cm, val) { return cm.setValue(val); }, true);
7672 option("mode", null, function (cm, val) {
7673 cm.doc.modeOption = val;
7674 loadMode(cm);
7675 }, true);
7676
7677 option("indentUnit", 2, loadMode, true);
7678 option("indentWithTabs", false);
7679 option("smartIndent", true);
7680 option("tabSize", 4, function (cm) {
7681 resetModeState(cm);
7682 clearCaches(cm);
7683 regChange(cm);
7684 }, true);
7685
7686 option("lineSeparator", null, function (cm, val) {
7687 cm.doc.lineSep = val;
7688 if (!val) { return }
7689 var newBreaks = [], lineNo = cm.doc.first;
7690 cm.doc.iter(function (line) {
7691 for (var pos = 0;;) {
7692 var found = line.text.indexOf(val, pos);
7693 if (found == -1) { break }
7694 pos = found + val.length;
7695 newBreaks.push(Pos(lineNo, found));
7696 }
7697 lineNo++;
7698 });
7699 for (var i = newBreaks.length - 1; i >= 0; i--)
7700 { replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)); }
7701 });
7702 option("specialChars", /[\u0000-\u001f\u007f-\u009f\u00ad\u061c\u200b-\u200c\u200e\u200f\u2028\u2029\ufeff\ufff9-\ufffc]/g, function (cm, val, old) {
7703 cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
7704 if (old != Init) { cm.refresh(); }
7705 });
7706 option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function (cm) { return cm.refresh(); }, true);
7707 option("electricChars", true);
7708 option("inputStyle", mobile ? "contenteditable" : "textarea", function () {
7709 throw new Error("inputStyle can not (yet) be changed in a running editor") // FIXME
7710 }, true);
7711 option("spellcheck", false, function (cm, val) { return cm.getInputField().spellcheck = val; }, true);
7712 option("autocorrect", false, function (cm, val) { return cm.getInputField().autocorrect = val; }, true);
7713 option("autocapitalize", false, function (cm, val) { return cm.getInputField().autocapitalize = val; }, true);
7714 option("rtlMoveVisually", !windows);
7715 option("wholeLineUpdateBefore", true);
7716
7717 option("theme", "default", function (cm) {
7718 themeChanged(cm);
7719 updateGutters(cm);
7720 }, true);
7721 option("keyMap", "default", function (cm, val, old) {
7722 var next = getKeyMap(val);
7723 var prev = old != Init && getKeyMap(old);
7724 if (prev && prev.detach) { prev.detach(cm, next); }
7725 if (next.attach) { next.attach(cm, prev || null); }
7726 });
7727 option("extraKeys", null);
7728 option("configureMouse", null);
7729
7730 option("lineWrapping", false, wrappingChanged, true);
7731 option("gutters", [], function (cm, val) {
7732 cm.display.gutterSpecs = getGutters(val, cm.options.lineNumbers);
7733 updateGutters(cm);
7734 }, true);
7735 option("fixedGutter", true, function (cm, val) {
7736 cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
7737 cm.refresh();
7738 }, true);
7739 option("coverGutterNextToScrollbar", false, function (cm) { return updateScrollbars(cm); }, true);
7740 option("scrollbarStyle", "native", function (cm) {
7741 initScrollbars(cm);
7742 updateScrollbars(cm);
7743 cm.display.scrollbars.setScrollTop(cm.doc.scrollTop);
7744 cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft);
7745 }, true);
7746 option("lineNumbers", false, function (cm, val) {
7747 cm.display.gutterSpecs = getGutters(cm.options.gutters, val);
7748 updateGutters(cm);
7749 }, true);
7750 option("firstLineNumber", 1, updateGutters, true);
7751 option("lineNumberFormatter", function (integer) { return integer; }, updateGutters, true);
7752 option("showCursorWhenSelecting", false, updateSelection, true);
7753
7754 option("resetSelectionOnContextMenu", true);
7755 option("lineWiseCopyCut", true);
7756 option("pasteLinesPerSelection", true);
7757 option("selectionsMayTouch", false);
7758
7759 option("readOnly", false, function (cm, val) {
7760 if (val == "nocursor") {
7761 onBlur(cm);
7762 cm.display.input.blur();
7763 }
7764 cm.display.input.readOnlyChanged(val);
7765 });
7766
7767 option("screenReaderLabel", null, function (cm, val) {
7768 val = (val === '') ? null : val;
7769 cm.display.input.screenReaderLabelChanged(val);
7770 });
7771
7772 option("disableInput", false, function (cm, val) {if (!val) { cm.display.input.reset(); }}, true);
7773 option("dragDrop", true, dragDropChanged);
7774 option("allowDropFileTypes", null);
7775
7776 option("cursorBlinkRate", 530);
7777 option("cursorScrollMargin", 0);
7778 option("cursorHeight", 1, updateSelection, true);
7779 option("singleCursorHeightPerLine", true, updateSelection, true);
7780 option("workTime", 100);
7781 option("workDelay", 100);
7782 option("flattenSpans", true, resetModeState, true);
7783 option("addModeClass", false, resetModeState, true);
7784 option("pollInterval", 100);
7785 option("undoDepth", 200, function (cm, val) { return cm.doc.history.undoDepth = val; });
7786 option("historyEventDelay", 1250);
7787 option("viewportMargin", 10, function (cm) { return cm.refresh(); }, true);
7788 option("maxHighlightLength", 10000, resetModeState, true);
7789 option("moveInputWithCursor", true, function (cm, val) {
7790 if (!val) { cm.display.input.resetPosition(); }
7791 });
7792
7793 option("tabindex", null, function (cm, val) { return cm.display.input.getField().tabIndex = val || ""; });
7794 option("autofocus", null);
7795 option("direction", "ltr", function (cm, val) { return cm.doc.setDirection(val); }, true);
7796 option("phrases", null);
7797 }
7798
7799 function dragDropChanged(cm, value, old) {
7800 var wasOn = old && old != Init;
7801 if (!value != !wasOn) {
7802 var funcs = cm.display.dragFunctions;
7803 var toggle = value ? on : off;
7804 toggle(cm.display.scroller, "dragstart", funcs.start);
7805 toggle(cm.display.scroller, "dragenter", funcs.enter);
7806 toggle(cm.display.scroller, "dragover", funcs.over);
7807 toggle(cm.display.scroller, "dragleave", funcs.leave);
7808 toggle(cm.display.scroller, "drop", funcs.drop);
7809 }
7810 }
7811
7812 function wrappingChanged(cm) {
7813 if (cm.options.lineWrapping) {
7814 addClass(cm.display.wrapper, "CodeMirror-wrap");
7815 cm.display.sizer.style.minWidth = "";
7816 cm.display.sizerWidth = null;
7817 } else {
7818 rmClass(cm.display.wrapper, "CodeMirror-wrap");
7819 findMaxLine(cm);
7820 }
7821 estimateLineHeights(cm);
7822 regChange(cm);
7823 clearCaches(cm);
7824 setTimeout(function () { return updateScrollbars(cm); }, 100);
7825 }
7826
7827 // A CodeMirror instance represents an editor. This is the object
7828 // that user code is usually dealing with.
7829
7830 function CodeMirror(place, options) {
7831 var this$1 = this;
7832
7833 if (!(this instanceof CodeMirror)) { return new CodeMirror(place, options) }
7834
7835 this.options = options = options ? copyObj(options) : {};
7836 // Determine effective options based on given values and defaults.
7837 copyObj(defaults, options, false);
7838
7839 var doc = options.value;
7840 if (typeof doc == "string") { doc = new Doc(doc, options.mode, null, options.lineSeparator, options.direction); }
7841 else if (options.mode) { doc.modeOption = options.mode; }
7842 this.doc = doc;
7843
7844 var input = new CodeMirror.inputStyles[options.inputStyle](this);
7845 var display = this.display = new Display(place, doc, input, options);
7846 display.wrapper.CodeMirror = this;
7847 themeChanged(this);
7848 if (options.lineWrapping)
7849 { this.display.wrapper.className += " CodeMirror-wrap"; }
7850 initScrollbars(this);
7851
7852 this.state = {
7853 keyMaps: [], // stores maps added by addKeyMap
7854 overlays: [], // highlighting overlays, as added by addOverlay
7855 modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info
7856 overwrite: false,
7857 delayingBlurEvent: false,
7858 focused: false,
7859 suppressEdits: false, // used to disable editing during key handlers when in readOnly mode
7860 pasteIncoming: -1, cutIncoming: -1, // help recognize paste/cut edits in input.poll
7861 selectingText: false,
7862 draggingText: false,
7863 highlight: new Delayed(), // stores highlight worker timeout
7864 keySeq: null, // Unfinished key sequence
7865 specialChars: null
7866 };
7867
7868 if (options.autofocus && !mobile) { display.input.focus(); }
7869
7870 // Override magic textarea content restore that IE sometimes does
7871 // on our hidden textarea on reload
7872 if (ie && ie_version < 11) { setTimeout(function () { return this$1.display.input.reset(true); }, 20); }
7873
7874 registerEventHandlers(this);
7875 ensureGlobalHandlers();
7876
7877 startOperation(this);
7878 this.curOp.forceUpdate = true;
7879 attachDoc(this, doc);
7880
7881 if ((options.autofocus && !mobile) || this.hasFocus())
7882 { setTimeout(function () {
7883 if (this$1.hasFocus() && !this$1.state.focused) { onFocus(this$1); }
7884 }, 20); }
7885 else
7886 { onBlur(this); }
7887
7888 for (var opt in optionHandlers) { if (optionHandlers.hasOwnProperty(opt))
7889 { optionHandlers[opt](this, options[opt], Init); } }
7890 maybeUpdateLineNumberWidth(this);
7891 if (options.finishInit) { options.finishInit(this); }
7892 for (var i = 0; i < initHooks.length; ++i) { initHooks[i](this); }
7893 endOperation(this);
7894 // Suppress optimizelegibility in Webkit, since it breaks text
7895 // measuring on line wrapping boundaries.
7896 if (webkit && options.lineWrapping &&
7897 getComputedStyle(display.lineDiv).textRendering == "optimizelegibility")
7898 { display.lineDiv.style.textRendering = "auto"; }
7899 }
7900
7901 // The default configuration options.
7902 CodeMirror.defaults = defaults;
7903 // Functions to run when options are changed.
7904 CodeMirror.optionHandlers = optionHandlers;
7905
7906 // Attach the necessary event handlers when initializing the editor
7907 function registerEventHandlers(cm) {
7908 var d = cm.display;
7909 on(d.scroller, "mousedown", operation(cm, onMouseDown));
7910 // Older IE's will not fire a second mousedown for a double click
7911 if (ie && ie_version < 11)
7912 { on(d.scroller, "dblclick", operation(cm, function (e) {
7913 if (signalDOMEvent(cm, e)) { return }
7914 var pos = posFromMouse(cm, e);
7915 if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) { return }
7916 e_preventDefault(e);
7917 var word = cm.findWordAt(pos);
7918 extendSelection(cm.doc, word.anchor, word.head);
7919 })); }
7920 else
7921 { on(d.scroller, "dblclick", function (e) { return signalDOMEvent(cm, e) || e_preventDefault(e); }); }
7922 // Some browsers fire contextmenu *after* opening the menu, at
7923 // which point we can't mess with it anymore. Context menu is
7924 // handled in onMouseDown for these browsers.
7925 on(d.scroller, "contextmenu", function (e) { return onContextMenu(cm, e); });
7926 on(d.input.getField(), "contextmenu", function (e) {
7927 if (!d.scroller.contains(e.target)) { onContextMenu(cm, e); }
7928 });
7929
7930 // Used to suppress mouse event handling when a touch happens
7931 var touchFinished, prevTouch = {end: 0};
7932 function finishTouch() {
7933 if (d.activeTouch) {
7934 touchFinished = setTimeout(function () { return d.activeTouch = null; }, 1000);
7935 prevTouch = d.activeTouch;
7936 prevTouch.end = +new Date;
7937 }
7938 }
7939 function isMouseLikeTouchEvent(e) {
7940 if (e.touches.length != 1) { return false }
7941 var touch = e.touches[0];
7942 return touch.radiusX <= 1 && touch.radiusY <= 1
7943 }
7944 function farAway(touch, other) {
7945 if (other.left == null) { return true }
7946 var dx = other.left - touch.left, dy = other.top - touch.top;
7947 return dx * dx + dy * dy > 20 * 20
7948 }
7949 on(d.scroller, "touchstart", function (e) {
7950 if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e) && !clickInGutter(cm, e)) {
7951 d.input.ensurePolled();
7952 clearTimeout(touchFinished);
7953 var now = +new Date;
7954 d.activeTouch = {start: now, moved: false,
7955 prev: now - prevTouch.end <= 300 ? prevTouch : null};
7956 if (e.touches.length == 1) {
7957 d.activeTouch.left = e.touches[0].pageX;
7958 d.activeTouch.top = e.touches[0].pageY;
7959 }
7960 }
7961 });
7962 on(d.scroller, "touchmove", function () {
7963 if (d.activeTouch) { d.activeTouch.moved = true; }
7964 });
7965 on(d.scroller, "touchend", function (e) {
7966 var touch = d.activeTouch;
7967 if (touch && !eventInWidget(d, e) && touch.left != null &&
7968 !touch.moved && new Date - touch.start < 300) {
7969 var pos = cm.coordsChar(d.activeTouch, "page"), range;
7970 if (!touch.prev || farAway(touch, touch.prev)) // Single tap
7971 { range = new Range(pos, pos); }
7972 else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap
7973 { range = cm.findWordAt(pos); }
7974 else // Triple tap
7975 { range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); }
7976 cm.setSelection(range.anchor, range.head);
7977 cm.focus();
7978 e_preventDefault(e);
7979 }
7980 finishTouch();
7981 });
7982 on(d.scroller, "touchcancel", finishTouch);
7983
7984 // Sync scrolling between fake scrollbars and real scrollable
7985 // area, ensure viewport is updated when scrolling.
7986 on(d.scroller, "scroll", function () {
7987 if (d.scroller.clientHeight) {
7988 updateScrollTop(cm, d.scroller.scrollTop);
7989 setScrollLeft(cm, d.scroller.scrollLeft, true);
7990 signal(cm, "scroll", cm);
7991 }
7992 });
7993
7994 // Listen to wheel events in order to try and update the viewport on time.
7995 on(d.scroller, "mousewheel", function (e) { return onScrollWheel(cm, e); });
7996 on(d.scroller, "DOMMouseScroll", function (e) { return onScrollWheel(cm, e); });
7997
7998 // Prevent wrapper from ever scrolling
7999 on(d.wrapper, "scroll", function () { return d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
8000
8001 d.dragFunctions = {
8002 enter: function (e) {if (!signalDOMEvent(cm, e)) { e_stop(e); }},
8003 over: function (e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }},
8004 start: function (e) { return onDragStart(cm, e); },
8005 drop: operation(cm, onDrop),
8006 leave: function (e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }}
8007 };
8008
8009 var inp = d.input.getField();
8010 on(inp, "keyup", function (e) { return onKeyUp.call(cm, e); });
8011 on(inp, "keydown", operation(cm, onKeyDown));
8012 on(inp, "keypress", operation(cm, onKeyPress));
8013 on(inp, "focus", function (e) { return onFocus(cm, e); });
8014 on(inp, "blur", function (e) { return onBlur(cm, e); });
8015 }
8016
8017 var initHooks = [];
8018 CodeMirror.defineInitHook = function (f) { return initHooks.push(f); };
8019
8020 // Indent the given line. The how parameter can be "smart",
8021 // "add"/null, "subtract", or "prev". When aggressive is false
8022 // (typically set to true for forced single-line indents), empty
8023 // lines are not indented, and places where the mode returns Pass
8024 // are left alone.
8025 function indentLine(cm, n, how, aggressive) {
8026 var doc = cm.doc, state;
8027 if (how == null) { how = "add"; }
8028 if (how == "smart") {
8029 // Fall back to "prev" when the mode doesn't have an indentation
8030 // method.
8031 if (!doc.mode.indent) { how = "prev"; }
8032 else { state = getContextBefore(cm, n).state; }
8033 }
8034
8035 var tabSize = cm.options.tabSize;
8036 var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
8037 if (line.stateAfter) { line.stateAfter = null; }
8038 var curSpaceString = line.text.match(/^\s*/)[0], indentation;
8039 if (!aggressive && !/\S/.test(line.text)) {
8040 indentation = 0;
8041 how = "not";
8042 } else if (how == "smart") {
8043 indentation = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
8044 if (indentation == Pass || indentation > 150) {
8045 if (!aggressive) { return }
8046 how = "prev";
8047 }
8048 }
8049 if (how == "prev") {
8050 if (n > doc.first) { indentation = countColumn(getLine(doc, n-1).text, null, tabSize); }
8051 else { indentation = 0; }
8052 } else if (how == "add") {
8053 indentation = curSpace + cm.options.indentUnit;
8054 } else if (how == "subtract") {
8055 indentation = curSpace - cm.options.indentUnit;
8056 } else if (typeof how == "number") {
8057 indentation = curSpace + how;
8058 }
8059 indentation = Math.max(0, indentation);
8060
8061 var indentString = "", pos = 0;
8062 if (cm.options.indentWithTabs)
8063 { for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} }
8064 if (pos < indentation) { indentString += spaceStr(indentation - pos); }
8065
8066 if (indentString != curSpaceString) {
8067 replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
8068 line.stateAfter = null;
8069 return true
8070 } else {
8071 // Ensure that, if the cursor was in the whitespace at the start
8072 // of the line, it is moved to the end of that space.
8073 for (var i$1 = 0; i$1 < doc.sel.ranges.length; i$1++) {
8074 var range = doc.sel.ranges[i$1];
8075 if (range.head.line == n && range.head.ch < curSpaceString.length) {
8076 var pos$1 = Pos(n, curSpaceString.length);
8077 replaceOneSelection(doc, i$1, new Range(pos$1, pos$1));
8078 break
8079 }
8080 }
8081 }
8082 }
8083
8084 // This will be set to a {lineWise: bool, text: [string]} object, so
8085 // that, when pasting, we know what kind of selections the copied
8086 // text was made out of.
8087 var lastCopied = null;
8088
8089 function setLastCopied(newLastCopied) {
8090 lastCopied = newLastCopied;
8091 }
8092
8093 function applyTextInput(cm, inserted, deleted, sel, origin) {
8094 var doc = cm.doc;
8095 cm.display.shift = false;
8096 if (!sel) { sel = doc.sel; }
8097
8098 var recent = +new Date - 200;
8099 var paste = origin == "paste" || cm.state.pasteIncoming > recent;
8100 var textLines = splitLinesAuto(inserted), multiPaste = null;
8101 // When pasting N lines into N selections, insert one line per selection
8102 if (paste && sel.ranges.length > 1) {
8103 if (lastCopied && lastCopied.text.join("\n") == inserted) {
8104 if (sel.ranges.length % lastCopied.text.length == 0) {
8105 multiPaste = [];
8106 for (var i = 0; i < lastCopied.text.length; i++)
8107 { multiPaste.push(doc.splitLines(lastCopied.text[i])); }
8108 }
8109 } else if (textLines.length == sel.ranges.length && cm.options.pasteLinesPerSelection) {
8110 multiPaste = map(textLines, function (l) { return [l]; });
8111 }
8112 }
8113
8114 var updateInput = cm.curOp.updateInput;
8115 // Normal behavior is to insert the new text into every selection
8116 for (var i$1 = sel.ranges.length - 1; i$1 >= 0; i$1--) {
8117 var range = sel.ranges[i$1];
8118 var from = range.from(), to = range.to();
8119 if (range.empty()) {
8120 if (deleted && deleted > 0) // Handle deletion
8121 { from = Pos(from.line, from.ch - deleted); }
8122 else if (cm.state.overwrite && !paste) // Handle overwrite
8123 { to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); }
8124 else if (paste && lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == textLines.join("\n"))
8125 { from = to = Pos(from.line, 0); }
8126 }
8127 var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i$1 % multiPaste.length] : textLines,
8128 origin: origin || (paste ? "paste" : cm.state.cutIncoming > recent ? "cut" : "+input")};
8129 makeChange(cm.doc, changeEvent);
8130 signalLater(cm, "inputRead", cm, changeEvent);
8131 }
8132 if (inserted && !paste)
8133 { triggerElectric(cm, inserted); }
8134
8135 ensureCursorVisible(cm);
8136 if (cm.curOp.updateInput < 2) { cm.curOp.updateInput = updateInput; }
8137 cm.curOp.typing = true;
8138 cm.state.pasteIncoming = cm.state.cutIncoming = -1;
8139 }
8140
8141 function handlePaste(e, cm) {
8142 var pasted = e.clipboardData && e.clipboardData.getData("Text");
8143 if (pasted) {
8144 e.preventDefault();
8145 if (!cm.isReadOnly() && !cm.options.disableInput)
8146 { runInOp(cm, function () { return applyTextInput(cm, pasted, 0, null, "paste"); }); }
8147 return true
8148 }
8149 }
8150
8151 function triggerElectric(cm, inserted) {
8152 // When an 'electric' character is inserted, immediately trigger a reindent
8153 if (!cm.options.electricChars || !cm.options.smartIndent) { return }
8154 var sel = cm.doc.sel;
8155
8156 for (var i = sel.ranges.length - 1; i >= 0; i--) {
8157 var range = sel.ranges[i];
8158 if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) { continue }
8159 var mode = cm.getModeAt(range.head);
8160 var indented = false;
8161 if (mode.electricChars) {
8162 for (var j = 0; j < mode.electricChars.length; j++)
8163 { if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) {
8164 indented = indentLine(cm, range.head.line, "smart");
8165 break
8166 } }
8167 } else if (mode.electricInput) {
8168 if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch)))
8169 { indented = indentLine(cm, range.head.line, "smart"); }
8170 }
8171 if (indented) { signalLater(cm, "electricInput", cm, range.head.line); }
8172 }
8173 }
8174
8175 function copyableRanges(cm) {
8176 var text = [], ranges = [];
8177 for (var i = 0; i < cm.doc.sel.ranges.length; i++) {
8178 var line = cm.doc.sel.ranges[i].head.line;
8179 var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)};
8180 ranges.push(lineRange);
8181 text.push(cm.getRange(lineRange.anchor, lineRange.head));
8182 }
8183 return {text: text, ranges: ranges}
8184 }
8185
8186 function disableBrowserMagic(field, spellcheck, autocorrect, autocapitalize) {
8187 field.setAttribute("autocorrect", autocorrect ? "" : "off");
8188 field.setAttribute("autocapitalize", autocapitalize ? "" : "off");
8189 field.setAttribute("spellcheck", !!spellcheck);
8190 }
8191
8192 function hiddenTextarea() {
8193 var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none");
8194 var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
8195 // The textarea is kept positioned near the cursor to prevent the
8196 // fact that it'll be scrolled into view on input from scrolling
8197 // our fake cursor out of view. On webkit, when wrap=off, paste is
8198 // very slow. So make the area wide instead.
8199 if (webkit) { te.style.width = "1000px"; }
8200 else { te.setAttribute("wrap", "off"); }
8201 // If border: 0; -- iOS fails to open keyboard (issue #1287)
8202 if (ios) { te.style.border = "1px solid black"; }
8203 disableBrowserMagic(te);
8204 return div
8205 }
8206
8207 // The publicly visible API. Note that methodOp(f) means
8208 // 'wrap f in an operation, performed on its `this` parameter'.
8209
8210 // This is not the complete set of editor methods. Most of the
8211 // methods defined on the Doc type are also injected into
8212 // CodeMirror.prototype, for backwards compatibility and
8213 // convenience.
8214
8215 function addEditorMethods(CodeMirror) {
8216 var optionHandlers = CodeMirror.optionHandlers;
8217
8218 var helpers = CodeMirror.helpers = {};
8219
8220 CodeMirror.prototype = {
8221 constructor: CodeMirror,
8222 focus: function(){window.focus(); this.display.input.focus();},
8223
8224 setOption: function(option, value) {
8225 var options = this.options, old = options[option];
8226 if (options[option] == value && option != "mode") { return }
8227 options[option] = value;
8228 if (optionHandlers.hasOwnProperty(option))
8229 { operation(this, optionHandlers[option])(this, value, old); }
8230 signal(this, "optionChange", this, option);
8231 },
8232
8233 getOption: function(option) {return this.options[option]},
8234 getDoc: function() {return this.doc},
8235
8236 addKeyMap: function(map, bottom) {
8237 this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map));
8238 },
8239 removeKeyMap: function(map) {
8240 var maps = this.state.keyMaps;
8241 for (var i = 0; i < maps.length; ++i)
8242 { if (maps[i] == map || maps[i].name == map) {
8243 maps.splice(i, 1);
8244 return true
8245 } }
8246 },
8247
8248 addOverlay: methodOp(function(spec, options) {
8249 var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
8250 if (mode.startState) { throw new Error("Overlays may not be stateful.") }
8251 insertSorted(this.state.overlays,
8252 {mode: mode, modeSpec: spec, opaque: options && options.opaque,
8253 priority: (options && options.priority) || 0},
8254 function (overlay) { return overlay.priority; });
8255 this.state.modeGen++;
8256 regChange(this);
8257 }),
8258 removeOverlay: methodOp(function(spec) {
8259 var overlays = this.state.overlays;
8260 for (var i = 0; i < overlays.length; ++i) {
8261 var cur = overlays[i].modeSpec;
8262 if (cur == spec || typeof spec == "string" && cur.name == spec) {
8263 overlays.splice(i, 1);
8264 this.state.modeGen++;
8265 regChange(this);
8266 return
8267 }
8268 }
8269 }),
8270
8271 indentLine: methodOp(function(n, dir, aggressive) {
8272 if (typeof dir != "string" && typeof dir != "number") {
8273 if (dir == null) { dir = this.options.smartIndent ? "smart" : "prev"; }
8274 else { dir = dir ? "add" : "subtract"; }
8275 }
8276 if (isLine(this.doc, n)) { indentLine(this, n, dir, aggressive); }
8277 }),
8278 indentSelection: methodOp(function(how) {
8279 var ranges = this.doc.sel.ranges, end = -1;
8280 for (var i = 0; i < ranges.length; i++) {
8281 var range = ranges[i];
8282 if (!range.empty()) {
8283 var from = range.from(), to = range.to();
8284 var start = Math.max(end, from.line);
8285 end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1;
8286 for (var j = start; j < end; ++j)
8287 { indentLine(this, j, how); }
8288 var newRanges = this.doc.sel.ranges;
8289 if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0)
8290 { replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); }
8291 } else if (range.head.line > end) {
8292 indentLine(this, range.head.line, how, true);
8293 end = range.head.line;
8294 if (i == this.doc.sel.primIndex) { ensureCursorVisible(this); }
8295 }
8296 }
8297 }),
8298
8299 // Fetch the parser token for a given character. Useful for hacks
8300 // that want to inspect the mode state (say, for completion).
8301 getTokenAt: function(pos, precise) {
8302 return takeToken(this, pos, precise)
8303 },
8304
8305 getLineTokens: function(line, precise) {
8306 return takeToken(this, Pos(line), precise, true)
8307 },
8308
8309 getTokenTypeAt: function(pos) {
8310 pos = clipPos(this.doc, pos);
8311 var styles = getLineStyles(this, getLine(this.doc, pos.line));
8312 var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
8313 var type;
8314 if (ch == 0) { type = styles[2]; }
8315 else { for (;;) {
8316 var mid = (before + after) >> 1;
8317 if ((mid ? styles[mid * 2 - 1] : 0) >= ch) { after = mid; }
8318 else if (styles[mid * 2 + 1] < ch) { before = mid + 1; }
8319 else { type = styles[mid * 2 + 2]; break }
8320 } }
8321 var cut = type ? type.indexOf("overlay ") : -1;
8322 return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1)
8323 },
8324
8325 getModeAt: function(pos) {
8326 var mode = this.doc.mode;
8327 if (!mode.innerMode) { return mode }
8328 return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode
8329 },
8330
8331 getHelper: function(pos, type) {
8332 return this.getHelpers(pos, type)[0]
8333 },
8334
8335 getHelpers: function(pos, type) {
8336 var found = [];
8337 if (!helpers.hasOwnProperty(type)) { return found }
8338 var help = helpers[type], mode = this.getModeAt(pos);
8339 if (typeof mode[type] == "string") {
8340 if (help[mode[type]]) { found.push(help[mode[type]]); }
8341 } else if (mode[type]) {
8342 for (var i = 0; i < mode[type].length; i++) {
8343 var val = help[mode[type][i]];
8344 if (val) { found.push(val); }
8345 }
8346 } else if (mode.helperType && help[mode.helperType]) {
8347 found.push(help[mode.helperType]);
8348 } else if (help[mode.name]) {
8349 found.push(help[mode.name]);
8350 }
8351 for (var i$1 = 0; i$1 < help._global.length; i$1++) {
8352 var cur = help._global[i$1];
8353 if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
8354 { found.push(cur.val); }
8355 }
8356 return found
8357 },
8358
8359 getStateAfter: function(line, precise) {
8360 var doc = this.doc;
8361 line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
8362 return getContextBefore(this, line + 1, precise).state
8363 },
8364
8365 cursorCoords: function(start, mode) {
8366 var pos, range = this.doc.sel.primary();
8367 if (start == null) { pos = range.head; }
8368 else if (typeof start == "object") { pos = clipPos(this.doc, start); }
8369 else { pos = start ? range.from() : range.to(); }
8370 return cursorCoords(this, pos, mode || "page")
8371 },
8372
8373 charCoords: function(pos, mode) {
8374 return charCoords(this, clipPos(this.doc, pos), mode || "page")
8375 },
8376
8377 coordsChar: function(coords, mode) {
8378 coords = fromCoordSystem(this, coords, mode || "page");
8379 return coordsChar(this, coords.left, coords.top)
8380 },
8381
8382 lineAtHeight: function(height, mode) {
8383 height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
8384 return lineAtHeight(this.doc, height + this.display.viewOffset)
8385 },
8386 heightAtLine: function(line, mode, includeWidgets) {
8387 var end = false, lineObj;
8388 if (typeof line == "number") {
8389 var last = this.doc.first + this.doc.size - 1;
8390 if (line < this.doc.first) { line = this.doc.first; }
8391 else if (line > last) { line = last; end = true; }
8392 lineObj = getLine(this.doc, line);
8393 } else {
8394 lineObj = line;
8395 }
8396 return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page", includeWidgets || end).top +
8397 (end ? this.doc.height - heightAtLine(lineObj) : 0)
8398 },
8399
8400 defaultTextHeight: function() { return textHeight(this.display) },
8401 defaultCharWidth: function() { return charWidth(this.display) },
8402
8403 getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo}},
8404
8405 addWidget: function(pos, node, scroll, vert, horiz) {
8406 var display = this.display;
8407 pos = cursorCoords(this, clipPos(this.doc, pos));
8408 var top = pos.bottom, left = pos.left;
8409 node.style.position = "absolute";
8410 node.setAttribute("cm-ignore-events", "true");
8411 this.display.input.setUneditable(node);
8412 display.sizer.appendChild(node);
8413 if (vert == "over") {
8414 top = pos.top;
8415 } else if (vert == "above" || vert == "near") {
8416 var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
8417 hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
8418 // Default to positioning above (if specified and possible); otherwise default to positioning below
8419 if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
8420 { top = pos.top - node.offsetHeight; }
8421 else if (pos.bottom + node.offsetHeight <= vspace)
8422 { top = pos.bottom; }
8423 if (left + node.offsetWidth > hspace)
8424 { left = hspace - node.offsetWidth; }
8425 }
8426 node.style.top = top + "px";
8427 node.style.left = node.style.right = "";
8428 if (horiz == "right") {
8429 left = display.sizer.clientWidth - node.offsetWidth;
8430 node.style.right = "0px";
8431 } else {
8432 if (horiz == "left") { left = 0; }
8433 else if (horiz == "middle") { left = (display.sizer.clientWidth - node.offsetWidth) / 2; }
8434 node.style.left = left + "px";
8435 }
8436 if (scroll)
8437 { scrollIntoView(this, {left: left, top: top, right: left + node.offsetWidth, bottom: top + node.offsetHeight}); }
8438 },
8439
8440 triggerOnKeyDown: methodOp(onKeyDown),
8441 triggerOnKeyPress: methodOp(onKeyPress),
8442 triggerOnKeyUp: onKeyUp,
8443 triggerOnMouseDown: methodOp(onMouseDown),
8444
8445 execCommand: function(cmd) {
8446 if (commands.hasOwnProperty(cmd))
8447 { return commands[cmd].call(null, this) }
8448 },
8449
8450 triggerElectric: methodOp(function(text) { triggerElectric(this, text); }),
8451
8452 findPosH: function(from, amount, unit, visually) {
8453 var dir = 1;
8454 if (amount < 0) { dir = -1; amount = -amount; }
8455 var cur = clipPos(this.doc, from);
8456 for (var i = 0; i < amount; ++i) {
8457 cur = findPosH(this.doc, cur, dir, unit, visually);
8458 if (cur.hitSide) { break }
8459 }
8460 return cur
8461 },
8462
8463 moveH: methodOp(function(dir, unit) {
8464 var this$1 = this;
8465
8466 this.extendSelectionsBy(function (range) {
8467 if (this$1.display.shift || this$1.doc.extend || range.empty())
8468 { return findPosH(this$1.doc, range.head, dir, unit, this$1.options.rtlMoveVisually) }
8469 else
8470 { return dir < 0 ? range.from() : range.to() }
8471 }, sel_move);
8472 }),
8473
8474 deleteH: methodOp(function(dir, unit) {
8475 var sel = this.doc.sel, doc = this.doc;
8476 if (sel.somethingSelected())
8477 { doc.replaceSelection("", null, "+delete"); }
8478 else
8479 { deleteNearSelection(this, function (range) {
8480 var other = findPosH(doc, range.head, dir, unit, false);
8481 return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}
8482 }); }
8483 }),
8484
8485 findPosV: function(from, amount, unit, goalColumn) {
8486 var dir = 1, x = goalColumn;
8487 if (amount < 0) { dir = -1; amount = -amount; }
8488 var cur = clipPos(this.doc, from);
8489 for (var i = 0; i < amount; ++i) {
8490 var coords = cursorCoords(this, cur, "div");
8491 if (x == null) { x = coords.left; }
8492 else { coords.left = x; }
8493 cur = findPosV(this, coords, dir, unit);
8494 if (cur.hitSide) { break }
8495 }
8496 return cur
8497 },
8498
8499 moveV: methodOp(function(dir, unit) {
8500 var this$1 = this;
8501
8502 var doc = this.doc, goals = [];
8503 var collapse = !this.display.shift && !doc.extend && doc.sel.somethingSelected();
8504 doc.extendSelectionsBy(function (range) {
8505 if (collapse)
8506 { return dir < 0 ? range.from() : range.to() }
8507 var headPos = cursorCoords(this$1, range.head, "div");
8508 if (range.goalColumn != null) { headPos.left = range.goalColumn; }
8509 goals.push(headPos.left);
8510 var pos = findPosV(this$1, headPos, dir, unit);
8511 if (unit == "page" && range == doc.sel.primary())
8512 { addToScrollTop(this$1, charCoords(this$1, pos, "div").top - headPos.top); }
8513 return pos
8514 }, sel_move);
8515 if (goals.length) { for (var i = 0; i < doc.sel.ranges.length; i++)
8516 { doc.sel.ranges[i].goalColumn = goals[i]; } }
8517 }),
8518
8519 // Find the word at the given position (as returned by coordsChar).
8520 findWordAt: function(pos) {
8521 var doc = this.doc, line = getLine(doc, pos.line).text;
8522 var start = pos.ch, end = pos.ch;
8523 if (line) {
8524 var helper = this.getHelper(pos, "wordChars");
8525 if ((pos.sticky == "before" || end == line.length) && start) { --start; } else { ++end; }
8526 var startChar = line.charAt(start);
8527 var check = isWordChar(startChar, helper)
8528 ? function (ch) { return isWordChar(ch, helper); }
8529 : /\s/.test(startChar) ? function (ch) { return /\s/.test(ch); }
8530 : function (ch) { return (!/\s/.test(ch) && !isWordChar(ch)); };
8531 while (start > 0 && check(line.charAt(start - 1))) { --start; }
8532 while (end < line.length && check(line.charAt(end))) { ++end; }
8533 }
8534 return new Range(Pos(pos.line, start), Pos(pos.line, end))
8535 },
8536
8537 toggleOverwrite: function(value) {
8538 if (value != null && value == this.state.overwrite) { return }
8539 if (this.state.overwrite = !this.state.overwrite)
8540 { addClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
8541 else
8542 { rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); }
8543
8544 signal(this, "overwriteToggle", this, this.state.overwrite);
8545 },
8546 hasFocus: function() { return this.display.input.getField() == activeElt() },
8547 isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit) },
8548
8549 scrollTo: methodOp(function (x, y) { scrollToCoords(this, x, y); }),
8550 getScrollInfo: function() {
8551 var scroller = this.display.scroller;
8552 return {left: scroller.scrollLeft, top: scroller.scrollTop,
8553 height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight,
8554 width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth,
8555 clientHeight: displayHeight(this), clientWidth: displayWidth(this)}
8556 },
8557
8558 scrollIntoView: methodOp(function(range, margin) {
8559 if (range == null) {
8560 range = {from: this.doc.sel.primary().head, to: null};
8561 if (margin == null) { margin = this.options.cursorScrollMargin; }
8562 } else if (typeof range == "number") {
8563 range = {from: Pos(range, 0), to: null};
8564 } else if (range.from == null) {
8565 range = {from: range, to: null};
8566 }
8567 if (!range.to) { range.to = range.from; }
8568 range.margin = margin || 0;
8569
8570 if (range.from.line != null) {
8571 scrollToRange(this, range);
8572 } else {
8573 scrollToCoordsRange(this, range.from, range.to, range.margin);
8574 }
8575 }),
8576
8577 setSize: methodOp(function(width, height) {
8578 var this$1 = this;
8579
8580 var interpret = function (val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; };
8581 if (width != null) { this.display.wrapper.style.width = interpret(width); }
8582 if (height != null) { this.display.wrapper.style.height = interpret(height); }
8583 if (this.options.lineWrapping) { clearLineMeasurementCache(this); }
8584 var lineNo = this.display.viewFrom;
8585 this.doc.iter(lineNo, this.display.viewTo, function (line) {
8586 if (line.widgets) { for (var i = 0; i < line.widgets.length; i++)
8587 { if (line.widgets[i].noHScroll) { regLineChange(this$1, lineNo, "widget"); break } } }
8588 ++lineNo;
8589 });
8590 this.curOp.forceUpdate = true;
8591 signal(this, "refresh", this);
8592 }),
8593
8594 operation: function(f){return runInOp(this, f)},
8595 startOperation: function(){return startOperation(this)},
8596 endOperation: function(){return endOperation(this)},
8597
8598 refresh: methodOp(function() {
8599 var oldHeight = this.display.cachedTextHeight;
8600 regChange(this);
8601 this.curOp.forceUpdate = true;
8602 clearCaches(this);
8603 scrollToCoords(this, this.doc.scrollLeft, this.doc.scrollTop);
8604 updateGutterSpace(this.display);
8605 if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5 || this.options.lineWrapping)
8606 { estimateLineHeights(this); }
8607 signal(this, "refresh", this);
8608 }),
8609
8610 swapDoc: methodOp(function(doc) {
8611 var old = this.doc;
8612 old.cm = null;
8613 // Cancel the current text selection if any (#5821)
8614 if (this.state.selectingText) { this.state.selectingText(); }
8615 attachDoc(this, doc);
8616 clearCaches(this);
8617 this.display.input.reset();
8618 scrollToCoords(this, doc.scrollLeft, doc.scrollTop);
8619 this.curOp.forceScroll = true;
8620 signalLater(this, "swapDoc", this, old);
8621 return old
8622 }),
8623
8624 phrase: function(phraseText) {
8625 var phrases = this.options.phrases;
8626 return phrases && Object.prototype.hasOwnProperty.call(phrases, phraseText) ? phrases[phraseText] : phraseText
8627 },
8628
8629 getInputField: function(){return this.display.input.getField()},
8630 getWrapperElement: function(){return this.display.wrapper},
8631 getScrollerElement: function(){return this.display.scroller},
8632 getGutterElement: function(){return this.display.gutters}
8633 };
8634 eventMixin(CodeMirror);
8635
8636 CodeMirror.registerHelper = function(type, name, value) {
8637 if (!helpers.hasOwnProperty(type)) { helpers[type] = CodeMirror[type] = {_global: []}; }
8638 helpers[type][name] = value;
8639 };
8640 CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
8641 CodeMirror.registerHelper(type, name, value);
8642 helpers[type]._global.push({pred: predicate, val: value});
8643 };
8644 }
8645
8646 // Used for horizontal relative motion. Dir is -1 or 1 (left or
8647 // right), unit can be "codepoint", "char", "column" (like char, but
8648 // doesn't cross line boundaries), "word" (across next word), or
8649 // "group" (to the start of next group of word or
8650 // non-word-non-whitespace chars). The visually param controls
8651 // whether, in right-to-left text, direction 1 means to move towards
8652 // the next index in the string, or towards the character to the right
8653 // of the current position. The resulting position will have a
8654 // hitSide=true property if it reached the end of the document.
8655 function findPosH(doc, pos, dir, unit, visually) {
8656 var oldPos = pos;
8657 var origDir = dir;
8658 var lineObj = getLine(doc, pos.line);
8659 var lineDir = visually && doc.direction == "rtl" ? -dir : dir;
8660 function findNextLine() {
8661 var l = pos.line + lineDir;
8662 if (l < doc.first || l >= doc.first + doc.size) { return false }
8663 pos = new Pos(l, pos.ch, pos.sticky);
8664 return lineObj = getLine(doc, l)
8665 }
8666 function moveOnce(boundToLine) {
8667 var next;
8668 if (unit == "codepoint") {
8669 var ch = lineObj.text.charCodeAt(pos.ch + (unit > 0 ? 0 : -1));
8670 if (isNaN(ch)) { next = null; }
8671 else { next = new Pos(pos.line, Math.max(0, Math.min(lineObj.text.length, pos.ch + dir * (ch >= 0xD800 && ch < 0xDC00 ? 2 : 1))),
8672 -dir); }
8673 } else if (visually) {
8674 next = moveVisually(doc.cm, lineObj, pos, dir);
8675 } else {
8676 next = moveLogically(lineObj, pos, dir);
8677 }
8678 if (next == null) {
8679 if (!boundToLine && findNextLine())
8680 { pos = endOfLine(visually, doc.cm, lineObj, pos.line, lineDir); }
8681 else
8682 { return false }
8683 } else {
8684 pos = next;
8685 }
8686 return true
8687 }
8688
8689 if (unit == "char" || unit == "codepoint") {
8690 moveOnce();
8691 } else if (unit == "column") {
8692 moveOnce(true);
8693 } else if (unit == "word" || unit == "group") {
8694 var sawType = null, group = unit == "group";
8695 var helper = doc.cm && doc.cm.getHelper(pos, "wordChars");
8696 for (var first = true;; first = false) {
8697 if (dir < 0 && !moveOnce(!first)) { break }
8698 var cur = lineObj.text.charAt(pos.ch) || "\n";
8699 var type = isWordChar(cur, helper) ? "w"
8700 : group && cur == "\n" ? "n"
8701 : !group || /\s/.test(cur) ? null
8702 : "p";
8703 if (group && !first && !type) { type = "s"; }
8704 if (sawType && sawType != type) {
8705 if (dir < 0) {dir = 1; moveOnce(); pos.sticky = "after";}
8706 break
8707 }
8708
8709 if (type) { sawType = type; }
8710 if (dir > 0 && !moveOnce(!first)) { break }
8711 }
8712 }
8713 var result = skipAtomic(doc, pos, oldPos, origDir, true);
8714 if (equalCursorPos(oldPos, result)) { result.hitSide = true; }
8715 return result
8716 }
8717
8718 // For relative vertical movement. Dir may be -1 or 1. Unit can be
8719 // "page" or "line". The resulting position will have a hitSide=true
8720 // property if it reached the end of the document.
8721 function findPosV(cm, pos, dir, unit) {
8722 var doc = cm.doc, x = pos.left, y;
8723 if (unit == "page") {
8724 var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
8725 var moveAmount = Math.max(pageSize - .5 * textHeight(cm.display), 3);
8726 y = (dir > 0 ? pos.bottom : pos.top) + dir * moveAmount;
8727
8728 } else if (unit == "line") {
8729 y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
8730 }
8731 var target;
8732 for (;;) {
8733 target = coordsChar(cm, x, y);
8734 if (!target.outside) { break }
8735 if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break }
8736 y += dir * 5;
8737 }
8738 return target
8739 }
8740
8741 // CONTENTEDITABLE INPUT STYLE
8742
8743 var ContentEditableInput = function(cm) {
8744 this.cm = cm;
8745 this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null;
8746 this.polling = new Delayed();
8747 this.composing = null;
8748 this.gracePeriod = false;
8749 this.readDOMTimeout = null;
8750 };
8751
8752 ContentEditableInput.prototype.init = function (display) {
8753 var this$1 = this;
8754
8755 var input = this, cm = input.cm;
8756 var div = input.div = display.lineDiv;
8757 disableBrowserMagic(div, cm.options.spellcheck, cm.options.autocorrect, cm.options.autocapitalize);
8758
8759 function belongsToInput(e) {
8760 for (var t = e.target; t; t = t.parentNode) {
8761 if (t == div) { return true }
8762 if (/\bCodeMirror-(?:line)?widget\b/.test(t.className)) { break }
8763 }
8764 return false
8765 }
8766
8767 on(div, "paste", function (e) {
8768 if (!belongsToInput(e) || signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
8769 // IE doesn't fire input events, so we schedule a read for the pasted content in this way
8770 if (ie_version <= 11) { setTimeout(operation(cm, function () { return this$1.updateFromDOM(); }), 20); }
8771 });
8772
8773 on(div, "compositionstart", function (e) {
8774 this$1.composing = {data: e.data, done: false};
8775 });
8776 on(div, "compositionupdate", function (e) {
8777 if (!this$1.composing) { this$1.composing = {data: e.data, done: false}; }
8778 });
8779 on(div, "compositionend", function (e) {
8780 if (this$1.composing) {
8781 if (e.data != this$1.composing.data) { this$1.readFromDOMSoon(); }
8782 this$1.composing.done = true;
8783 }
8784 });
8785
8786 on(div, "touchstart", function () { return input.forceCompositionEnd(); });
8787
8788 on(div, "input", function () {
8789 if (!this$1.composing) { this$1.readFromDOMSoon(); }
8790 });
8791
8792 function onCopyCut(e) {
8793 if (!belongsToInput(e) || signalDOMEvent(cm, e)) { return }
8794 if (cm.somethingSelected()) {
8795 setLastCopied({lineWise: false, text: cm.getSelections()});
8796 if (e.type == "cut") { cm.replaceSelection("", null, "cut"); }
8797 } else if (!cm.options.lineWiseCopyCut) {
8798 return
8799 } else {
8800 var ranges = copyableRanges(cm);
8801 setLastCopied({lineWise: true, text: ranges.text});
8802 if (e.type == "cut") {
8803 cm.operation(function () {
8804 cm.setSelections(ranges.ranges, 0, sel_dontScroll);
8805 cm.replaceSelection("", null, "cut");
8806 });
8807 }
8808 }
8809 if (e.clipboardData) {
8810 e.clipboardData.clearData();
8811 var content = lastCopied.text.join("\n");
8812 // iOS exposes the clipboard API, but seems to discard content inserted into it
8813 e.clipboardData.setData("Text", content);
8814 if (e.clipboardData.getData("Text") == content) {
8815 e.preventDefault();
8816 return
8817 }
8818 }
8819 // Old-fashioned briefly-focus-a-textarea hack
8820 var kludge = hiddenTextarea(), te = kludge.firstChild;
8821 cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild);
8822 te.value = lastCopied.text.join("\n");
8823 var hadFocus = document.activeElement;
8824 selectInput(te);
8825 setTimeout(function () {
8826 cm.display.lineSpace.removeChild(kludge);
8827 hadFocus.focus();
8828 if (hadFocus == div) { input.showPrimarySelection(); }
8829 }, 50);
8830 }
8831 on(div, "copy", onCopyCut);
8832 on(div, "cut", onCopyCut);
8833 };
8834
8835 ContentEditableInput.prototype.screenReaderLabelChanged = function (label) {
8836 // Label for screenreaders, accessibility
8837 if(label) {
8838 this.div.setAttribute('aria-label', label);
8839 } else {
8840 this.div.removeAttribute('aria-label');
8841 }
8842 };
8843
8844 ContentEditableInput.prototype.prepareSelection = function () {
8845 var result = prepareSelection(this.cm, false);
8846 result.focus = document.activeElement == this.div;
8847 return result
8848 };
8849
8850 ContentEditableInput.prototype.showSelection = function (info, takeFocus) {
8851 if (!info || !this.cm.display.view.length) { return }
8852 if (info.focus || takeFocus) { this.showPrimarySelection(); }
8853 this.showMultipleSelections(info);
8854 };
8855
8856 ContentEditableInput.prototype.getSelection = function () {
8857 return this.cm.display.wrapper.ownerDocument.getSelection()
8858 };
8859
8860 ContentEditableInput.prototype.showPrimarySelection = function () {
8861 var sel = this.getSelection(), cm = this.cm, prim = cm.doc.sel.primary();
8862 var from = prim.from(), to = prim.to();
8863
8864 if (cm.display.viewTo == cm.display.viewFrom || from.line >= cm.display.viewTo || to.line < cm.display.viewFrom) {
8865 sel.removeAllRanges();
8866 return
8867 }
8868
8869 var curAnchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
8870 var curFocus = domToPos(cm, sel.focusNode, sel.focusOffset);
8871 if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad &&
8872 cmp(minPos(curAnchor, curFocus), from) == 0 &&
8873 cmp(maxPos(curAnchor, curFocus), to) == 0)
8874 { return }
8875
8876 var view = cm.display.view;
8877 var start = (from.line >= cm.display.viewFrom && posToDOM(cm, from)) ||
8878 {node: view[0].measure.map[2], offset: 0};
8879 var end = to.line < cm.display.viewTo && posToDOM(cm, to);
8880 if (!end) {
8881 var measure = view[view.length - 1].measure;
8882 var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map;
8883 end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]};
8884 }
8885
8886 if (!start || !end) {
8887 sel.removeAllRanges();
8888 return
8889 }
8890
8891 var old = sel.rangeCount && sel.getRangeAt(0), rng;
8892 try { rng = range(start.node, start.offset, end.offset, end.node); }
8893 catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible
8894 if (rng) {
8895 if (!gecko && cm.state.focused) {
8896 sel.collapse(start.node, start.offset);
8897 if (!rng.collapsed) {
8898 sel.removeAllRanges();
8899 sel.addRange(rng);
8900 }
8901 } else {
8902 sel.removeAllRanges();
8903 sel.addRange(rng);
8904 }
8905 if (old && sel.anchorNode == null) { sel.addRange(old); }
8906 else if (gecko) { this.startGracePeriod(); }
8907 }
8908 this.rememberSelection();
8909 };
8910
8911 ContentEditableInput.prototype.startGracePeriod = function () {
8912 var this$1 = this;
8913
8914 clearTimeout(this.gracePeriod);
8915 this.gracePeriod = setTimeout(function () {
8916 this$1.gracePeriod = false;
8917 if (this$1.selectionChanged())
8918 { this$1.cm.operation(function () { return this$1.cm.curOp.selectionChanged = true; }); }
8919 }, 20);
8920 };
8921
8922 ContentEditableInput.prototype.showMultipleSelections = function (info) {
8923 removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors);
8924 removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection);
8925 };
8926
8927 ContentEditableInput.prototype.rememberSelection = function () {
8928 var sel = this.getSelection();
8929 this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset;
8930 this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset;
8931 };
8932
8933 ContentEditableInput.prototype.selectionInEditor = function () {
8934 var sel = this.getSelection();
8935 if (!sel.rangeCount) { return false }
8936 var node = sel.getRangeAt(0).commonAncestorContainer;
8937 return contains(this.div, node)
8938 };
8939
8940 ContentEditableInput.prototype.focus = function () {
8941 if (this.cm.options.readOnly != "nocursor") {
8942 if (!this.selectionInEditor() || document.activeElement != this.div)
8943 { this.showSelection(this.prepareSelection(), true); }
8944 this.div.focus();
8945 }
8946 };
8947 ContentEditableInput.prototype.blur = function () { this.div.blur(); };
8948 ContentEditableInput.prototype.getField = function () { return this.div };
8949
8950 ContentEditableInput.prototype.supportsTouch = function () { return true };
8951
8952 ContentEditableInput.prototype.receivedFocus = function () {
8953 var input = this;
8954 if (this.selectionInEditor())
8955 { this.pollSelection(); }
8956 else
8957 { runInOp(this.cm, function () { return input.cm.curOp.selectionChanged = true; }); }
8958
8959 function poll() {
8960 if (input.cm.state.focused) {
8961 input.pollSelection();
8962 input.polling.set(input.cm.options.pollInterval, poll);
8963 }
8964 }
8965 this.polling.set(this.cm.options.pollInterval, poll);
8966 };
8967
8968 ContentEditableInput.prototype.selectionChanged = function () {
8969 var sel = this.getSelection();
8970 return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset ||
8971 sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset
8972 };
8973
8974 ContentEditableInput.prototype.pollSelection = function () {
8975 if (this.readDOMTimeout != null || this.gracePeriod || !this.selectionChanged()) { return }
8976 var sel = this.getSelection(), cm = this.cm;
8977 // On Android Chrome (version 56, at least), backspacing into an
8978 // uneditable block element will put the cursor in that element,
8979 // and then, because it's not editable, hide the virtual keyboard.
8980 // Because Android doesn't allow us to actually detect backspace
8981 // presses in a sane way, this code checks for when that happens
8982 // and simulates a backspace press in this case.
8983 if (android && chrome && this.cm.display.gutterSpecs.length && isInGutter(sel.anchorNode)) {
8984 this.cm.triggerOnKeyDown({type: "keydown", keyCode: 8, preventDefault: Math.abs});
8985 this.blur();
8986 this.focus();
8987 return
8988 }
8989 if (this.composing) { return }
8990 this.rememberSelection();
8991 var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset);
8992 var head = domToPos(cm, sel.focusNode, sel.focusOffset);
8993 if (anchor && head) { runInOp(cm, function () {
8994 setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll);
8995 if (anchor.bad || head.bad) { cm.curOp.selectionChanged = true; }
8996 }); }
8997 };
8998
8999 ContentEditableInput.prototype.pollContent = function () {
9000 if (this.readDOMTimeout != null) {
9001 clearTimeout(this.readDOMTimeout);
9002 this.readDOMTimeout = null;
9003 }
9004
9005 var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary();
9006 var from = sel.from(), to = sel.to();
9007 if (from.ch == 0 && from.line > cm.firstLine())
9008 { from = Pos(from.line - 1, getLine(cm.doc, from.line - 1).length); }
9009 if (to.ch == getLine(cm.doc, to.line).text.length && to.line < cm.lastLine())
9010 { to = Pos(to.line + 1, 0); }
9011 if (from.line < display.viewFrom || to.line > display.viewTo - 1) { return false }
9012
9013 var fromIndex, fromLine, fromNode;
9014 if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) {
9015 fromLine = lineNo(display.view[0].line);
9016 fromNode = display.view[0].node;
9017 } else {
9018 fromLine = lineNo(display.view[fromIndex].line);
9019 fromNode = display.view[fromIndex - 1].node.nextSibling;
9020 }
9021 var toIndex = findViewIndex(cm, to.line);
9022 var toLine, toNode;
9023 if (toIndex == display.view.length - 1) {
9024 toLine = display.viewTo - 1;
9025 toNode = display.lineDiv.lastChild;
9026 } else {
9027 toLine = lineNo(display.view[toIndex + 1].line) - 1;
9028 toNode = display.view[toIndex + 1].node.previousSibling;
9029 }
9030
9031 if (!fromNode) { return false }
9032 var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine));
9033 var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length));
9034 while (newText.length > 1 && oldText.length > 1) {
9035 if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; }
9036 else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; }
9037 else { break }
9038 }
9039
9040 var cutFront = 0, cutEnd = 0;
9041 var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length);
9042 while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront))
9043 { ++cutFront; }
9044 var newBot = lst(newText), oldBot = lst(oldText);
9045 var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0),
9046 oldBot.length - (oldText.length == 1 ? cutFront : 0));
9047 while (cutEnd < maxCutEnd &&
9048 newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1))
9049 { ++cutEnd; }
9050 // Try to move start of change to start of selection if ambiguous
9051 if (newText.length == 1 && oldText.length == 1 && fromLine == from.line) {
9052 while (cutFront && cutFront > from.ch &&
9053 newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) {
9054 cutFront--;
9055 cutEnd++;
9056 }
9057 }
9058
9059 newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd).replace(/^\u200b+/, "");
9060 newText[0] = newText[0].slice(cutFront).replace(/\u200b+$/, "");
9061
9062 var chFrom = Pos(fromLine, cutFront);
9063 var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0);
9064 if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) {
9065 replaceRange(cm.doc, newText, chFrom, chTo, "+input");
9066 return true
9067 }
9068 };
9069
9070 ContentEditableInput.prototype.ensurePolled = function () {
9071 this.forceCompositionEnd();
9072 };
9073 ContentEditableInput.prototype.reset = function () {
9074 this.forceCompositionEnd();
9075 };
9076 ContentEditableInput.prototype.forceCompositionEnd = function () {
9077 if (!this.composing) { return }
9078 clearTimeout(this.readDOMTimeout);
9079 this.composing = null;
9080 this.updateFromDOM();
9081 this.div.blur();
9082 this.div.focus();
9083 };
9084 ContentEditableInput.prototype.readFromDOMSoon = function () {
9085 var this$1 = this;
9086
9087 if (this.readDOMTimeout != null) { return }
9088 this.readDOMTimeout = setTimeout(function () {
9089 this$1.readDOMTimeout = null;
9090 if (this$1.composing) {
9091 if (this$1.composing.done) { this$1.composing = null; }
9092 else { return }
9093 }
9094 this$1.updateFromDOM();
9095 }, 80);
9096 };
9097
9098 ContentEditableInput.prototype.updateFromDOM = function () {
9099 var this$1 = this;
9100
9101 if (this.cm.isReadOnly() || !this.pollContent())
9102 { runInOp(this.cm, function () { return regChange(this$1.cm); }); }
9103 };
9104
9105 ContentEditableInput.prototype.setUneditable = function (node) {
9106 node.contentEditable = "false";
9107 };
9108
9109 ContentEditableInput.prototype.onKeyPress = function (e) {
9110 if (e.charCode == 0 || this.composing) { return }
9111 e.preventDefault();
9112 if (!this.cm.isReadOnly())
9113 { operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }
9114 };
9115
9116 ContentEditableInput.prototype.readOnlyChanged = function (val) {
9117 this.div.contentEditable = String(val != "nocursor");
9118 };
9119
9120 ContentEditableInput.prototype.onContextMenu = function () {};
9121 ContentEditableInput.prototype.resetPosition = function () {};
9122
9123 ContentEditableInput.prototype.needsContentAttribute = true;
9124
9125 function posToDOM(cm, pos) {
9126 var view = findViewForLine(cm, pos.line);
9127 if (!view || view.hidden) { return null }
9128 var line = getLine(cm.doc, pos.line);
9129 var info = mapFromLineView(view, line, pos.line);
9130
9131 var order = getOrder(line, cm.doc.direction), side = "left";
9132 if (order) {
9133 var partPos = getBidiPartAt(order, pos.ch);
9134 side = partPos % 2 ? "right" : "left";
9135 }
9136 var result = nodeAndOffsetInLineMap(info.map, pos.ch, side);
9137 result.offset = result.collapse == "right" ? result.end : result.start;
9138 return result
9139 }
9140
9141 function isInGutter(node) {
9142 for (var scan = node; scan; scan = scan.parentNode)
9143 { if (/CodeMirror-gutter-wrapper/.test(scan.className)) { return true } }
9144 return false
9145 }
9146
9147 function badPos(pos, bad) { if (bad) { pos.bad = true; } return pos }
9148
9149 function domTextBetween(cm, from, to, fromLine, toLine) {
9150 var text = "", closing = false, lineSep = cm.doc.lineSeparator(), extraLinebreak = false;
9151 function recognizeMarker(id) { return function (marker) { return marker.id == id; } }
9152 function close() {
9153 if (closing) {
9154 text += lineSep;
9155 if (extraLinebreak) { text += lineSep; }
9156 closing = extraLinebreak = false;
9157 }
9158 }
9159 function addText(str) {
9160 if (str) {
9161 close();
9162 text += str;
9163 }
9164 }
9165 function walk(node) {
9166 if (node.nodeType == 1) {
9167 var cmText = node.getAttribute("cm-text");
9168 if (cmText) {
9169 addText(cmText);
9170 return
9171 }
9172 var markerID = node.getAttribute("cm-marker"), range;
9173 if (markerID) {
9174 var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID));
9175 if (found.length && (range = found[0].find(0)))
9176 { addText(getBetween(cm.doc, range.from, range.to).join(lineSep)); }
9177 return
9178 }
9179 if (node.getAttribute("contenteditable") == "false") { return }
9180 var isBlock = /^(pre|div|p|li|table|br)$/i.test(node.nodeName);
9181 if (!/^br$/i.test(node.nodeName) && node.textContent.length == 0) { return }
9182
9183 if (isBlock) { close(); }
9184 for (var i = 0; i < node.childNodes.length; i++)
9185 { walk(node.childNodes[i]); }
9186
9187 if (/^(pre|p)$/i.test(node.nodeName)) { extraLinebreak = true; }
9188 if (isBlock) { closing = true; }
9189 } else if (node.nodeType == 3) {
9190 addText(node.nodeValue.replace(/\u200b/g, "").replace(/\u00a0/g, " "));
9191 }
9192 }
9193 for (;;) {
9194 walk(from);
9195 if (from == to) { break }
9196 from = from.nextSibling;
9197 extraLinebreak = false;
9198 }
9199 return text
9200 }
9201
9202 function domToPos(cm, node, offset) {
9203 var lineNode;
9204 if (node == cm.display.lineDiv) {
9205 lineNode = cm.display.lineDiv.childNodes[offset];
9206 if (!lineNode) { return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true) }
9207 node = null; offset = 0;
9208 } else {
9209 for (lineNode = node;; lineNode = lineNode.parentNode) {
9210 if (!lineNode || lineNode == cm.display.lineDiv) { return null }
9211 if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) { break }
9212 }
9213 }
9214 for (var i = 0; i < cm.display.view.length; i++) {
9215 var lineView = cm.display.view[i];
9216 if (lineView.node == lineNode)
9217 { return locateNodeInLineView(lineView, node, offset) }
9218 }
9219 }
9220
9221 function locateNodeInLineView(lineView, node, offset) {
9222 var wrapper = lineView.text.firstChild, bad = false;
9223 if (!node || !contains(wrapper, node)) { return badPos(Pos(lineNo(lineView.line), 0), true) }
9224 if (node == wrapper) {
9225 bad = true;
9226 node = wrapper.childNodes[offset];
9227 offset = 0;
9228 if (!node) {
9229 var line = lineView.rest ? lst(lineView.rest) : lineView.line;
9230 return badPos(Pos(lineNo(line), line.text.length), bad)
9231 }
9232 }
9233
9234 var textNode = node.nodeType == 3 ? node : null, topNode = node;
9235 if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) {
9236 textNode = node.firstChild;
9237 if (offset) { offset = textNode.nodeValue.length; }
9238 }
9239 while (topNode.parentNode != wrapper) { topNode = topNode.parentNode; }
9240 var measure = lineView.measure, maps = measure.maps;
9241
9242 function find(textNode, topNode, offset) {
9243 for (var i = -1; i < (maps ? maps.length : 0); i++) {
9244 var map = i < 0 ? measure.map : maps[i];
9245 for (var j = 0; j < map.length; j += 3) {
9246 var curNode = map[j + 2];
9247 if (curNode == textNode || curNode == topNode) {
9248 var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]);
9249 var ch = map[j] + offset;
9250 if (offset < 0 || curNode != textNode) { ch = map[j + (offset ? 1 : 0)]; }
9251 return Pos(line, ch)
9252 }
9253 }
9254 }
9255 }
9256 var found = find(textNode, topNode, offset);
9257 if (found) { return badPos(found, bad) }
9258
9259 // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems
9260 for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) {
9261 found = find(after, after.firstChild, 0);
9262 if (found)
9263 { return badPos(Pos(found.line, found.ch - dist), bad) }
9264 else
9265 { dist += after.textContent.length; }
9266 }
9267 for (var before = topNode.previousSibling, dist$1 = offset; before; before = before.previousSibling) {
9268 found = find(before, before.firstChild, -1);
9269 if (found)
9270 { return badPos(Pos(found.line, found.ch + dist$1), bad) }
9271 else
9272 { dist$1 += before.textContent.length; }
9273 }
9274 }
9275
9276 // TEXTAREA INPUT STYLE
9277
9278 var TextareaInput = function(cm) {
9279 this.cm = cm;
9280 // See input.poll and input.reset
9281 this.prevInput = "";
9282
9283 // Flag that indicates whether we expect input to appear real soon
9284 // now (after some event like 'keypress' or 'input') and are
9285 // polling intensively.
9286 this.pollingFast = false;
9287 // Self-resetting timeout for the poller
9288 this.polling = new Delayed();
9289 // Used to work around IE issue with selection being forgotten when focus moves away from textarea
9290 this.hasSelection = false;
9291 this.composing = null;
9292 };
9293
9294 TextareaInput.prototype.init = function (display) {
9295 var this$1 = this;
9296
9297 var input = this, cm = this.cm;
9298 this.createField(display);
9299 var te = this.textarea;
9300
9301 display.wrapper.insertBefore(this.wrapper, display.wrapper.firstChild);
9302
9303 // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore)
9304 if (ios) { te.style.width = "0px"; }
9305
9306 on(te, "input", function () {
9307 if (ie && ie_version >= 9 && this$1.hasSelection) { this$1.hasSelection = null; }
9308 input.poll();
9309 });
9310
9311 on(te, "paste", function (e) {
9312 if (signalDOMEvent(cm, e) || handlePaste(e, cm)) { return }
9313
9314 cm.state.pasteIncoming = +new Date;
9315 input.fastPoll();
9316 });
9317
9318 function prepareCopyCut(e) {
9319 if (signalDOMEvent(cm, e)) { return }
9320 if (cm.somethingSelected()) {
9321 setLastCopied({lineWise: false, text: cm.getSelections()});
9322 } else if (!cm.options.lineWiseCopyCut) {
9323 return
9324 } else {
9325 var ranges = copyableRanges(cm);
9326 setLastCopied({lineWise: true, text: ranges.text});
9327 if (e.type == "cut") {
9328 cm.setSelections(ranges.ranges, null, sel_dontScroll);
9329 } else {
9330 input.prevInput = "";
9331 te.value = ranges.text.join("\n");
9332 selectInput(te);
9333 }
9334 }
9335 if (e.type == "cut") { cm.state.cutIncoming = +new Date; }
9336 }
9337 on(te, "cut", prepareCopyCut);
9338 on(te, "copy", prepareCopyCut);
9339
9340 on(display.scroller, "paste", function (e) {
9341 if (eventInWidget(display, e) || signalDOMEvent(cm, e)) { return }
9342 if (!te.dispatchEvent) {
9343 cm.state.pasteIncoming = +new Date;
9344 input.focus();
9345 return
9346 }
9347
9348 // Pass the `paste` event to the textarea so it's handled by its event listener.
9349 var event = new Event("paste");
9350 event.clipboardData = e.clipboardData;
9351 te.dispatchEvent(event);
9352 });
9353
9354 // Prevent normal selection in the editor (we handle our own)
9355 on(display.lineSpace, "selectstart", function (e) {
9356 if (!eventInWidget(display, e)) { e_preventDefault(e); }
9357 });
9358
9359 on(te, "compositionstart", function () {
9360 var start = cm.getCursor("from");
9361 if (input.composing) { input.composing.range.clear(); }
9362 input.composing = {
9363 start: start,
9364 range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"})
9365 };
9366 });
9367 on(te, "compositionend", function () {
9368 if (input.composing) {
9369 input.poll();
9370 input.composing.range.clear();
9371 input.composing = null;
9372 }
9373 });
9374 };
9375
9376 TextareaInput.prototype.createField = function (_display) {
9377 // Wraps and hides input textarea
9378 this.wrapper = hiddenTextarea();
9379 // The semihidden textarea that is focused when the editor is
9380 // focused, and receives input.
9381 this.textarea = this.wrapper.firstChild;
9382 };
9383
9384 TextareaInput.prototype.screenReaderLabelChanged = function (label) {
9385 // Label for screenreaders, accessibility
9386 if(label) {
9387 this.textarea.setAttribute('aria-label', label);
9388 } else {
9389 this.textarea.removeAttribute('aria-label');
9390 }
9391 };
9392
9393 TextareaInput.prototype.prepareSelection = function () {
9394 // Redraw the selection and/or cursor
9395 var cm = this.cm, display = cm.display, doc = cm.doc;
9396 var result = prepareSelection(cm);
9397
9398 // Move the hidden textarea near the cursor to prevent scrolling artifacts
9399 if (cm.options.moveInputWithCursor) {
9400 var headPos = cursorCoords(cm, doc.sel.primary().head, "div");
9401 var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
9402 result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
9403 headPos.top + lineOff.top - wrapOff.top));
9404 result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
9405 headPos.left + lineOff.left - wrapOff.left));
9406 }
9407
9408 return result
9409 };
9410
9411 TextareaInput.prototype.showSelection = function (drawn) {
9412 var cm = this.cm, display = cm.display;
9413 removeChildrenAndAdd(display.cursorDiv, drawn.cursors);
9414 removeChildrenAndAdd(display.selectionDiv, drawn.selection);
9415 if (drawn.teTop != null) {
9416 this.wrapper.style.top = drawn.teTop + "px";
9417 this.wrapper.style.left = drawn.teLeft + "px";
9418 }
9419 };
9420
9421 // Reset the input to correspond to the selection (or to be empty,
9422 // when not typing and nothing is selected)
9423 TextareaInput.prototype.reset = function (typing) {
9424 if (this.contextMenuPending || this.composing) { return }
9425 var cm = this.cm;
9426 if (cm.somethingSelected()) {
9427 this.prevInput = "";
9428 var content = cm.getSelection();
9429 this.textarea.value = content;
9430 if (cm.state.focused) { selectInput(this.textarea); }
9431 if (ie && ie_version >= 9) { this.hasSelection = content; }
9432 } else if (!typing) {
9433 this.prevInput = this.textarea.value = "";
9434 if (ie && ie_version >= 9) { this.hasSelection = null; }
9435 }
9436 };
9437
9438 TextareaInput.prototype.getField = function () { return this.textarea };
9439
9440 TextareaInput.prototype.supportsTouch = function () { return false };
9441
9442 TextareaInput.prototype.focus = function () {
9443 if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) {
9444 try { this.textarea.focus(); }
9445 catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM
9446 }
9447 };
9448
9449 TextareaInput.prototype.blur = function () { this.textarea.blur(); };
9450
9451 TextareaInput.prototype.resetPosition = function () {
9452 this.wrapper.style.top = this.wrapper.style.left = 0;
9453 };
9454
9455 TextareaInput.prototype.receivedFocus = function () { this.slowPoll(); };
9456
9457 // Poll for input changes, using the normal rate of polling. This
9458 // runs as long as the editor is focused.
9459 TextareaInput.prototype.slowPoll = function () {
9460 var this$1 = this;
9461
9462 if (this.pollingFast) { return }
9463 this.polling.set(this.cm.options.pollInterval, function () {
9464 this$1.poll();
9465 if (this$1.cm.state.focused) { this$1.slowPoll(); }
9466 });
9467 };
9468
9469 // When an event has just come in that is likely to add or change
9470 // something in the input textarea, we poll faster, to ensure that
9471 // the change appears on the screen quickly.
9472 TextareaInput.prototype.fastPoll = function () {
9473 var missed = false, input = this;
9474 input.pollingFast = true;
9475 function p() {
9476 var changed = input.poll();
9477 if (!changed && !missed) {missed = true; input.polling.set(60, p);}
9478 else {input.pollingFast = false; input.slowPoll();}
9479 }
9480 input.polling.set(20, p);
9481 };
9482
9483 // Read input from the textarea, and update the document to match.
9484 // When something is selected, it is present in the textarea, and
9485 // selected (unless it is huge, in which case a placeholder is
9486 // used). When nothing is selected, the cursor sits after previously
9487 // seen text (can be empty), which is stored in prevInput (we must
9488 // not reset the textarea when typing, because that breaks IME).
9489 TextareaInput.prototype.poll = function () {
9490 var this$1 = this;
9491
9492 var cm = this.cm, input = this.textarea, prevInput = this.prevInput;
9493 // Since this is called a *lot*, try to bail out as cheaply as
9494 // possible when it is clear that nothing happened. hasSelection
9495 // will be the case when there is a lot of text in the textarea,
9496 // in which case reading its value would be expensive.
9497 if (this.contextMenuPending || !cm.state.focused ||
9498 (hasSelection(input) && !prevInput && !this.composing) ||
9499 cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq)
9500 { return false }
9501
9502 var text = input.value;
9503 // If nothing changed, bail.
9504 if (text == prevInput && !cm.somethingSelected()) { return false }
9505 // Work around nonsensical selection resetting in IE9/10, and
9506 // inexplicable appearance of private area unicode characters on
9507 // some key combos in Mac (#2689).
9508 if (ie && ie_version >= 9 && this.hasSelection === text ||
9509 mac && /[\uf700-\uf7ff]/.test(text)) {
9510 cm.display.input.reset();
9511 return false
9512 }
9513
9514 if (cm.doc.sel == cm.display.selForContextMenu) {
9515 var first = text.charCodeAt(0);
9516 if (first == 0x200b && !prevInput) { prevInput = "\u200b"; }
9517 if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo") }
9518 }
9519 // Find the part of the input that is actually new
9520 var same = 0, l = Math.min(prevInput.length, text.length);
9521 while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) { ++same; }
9522
9523 runInOp(cm, function () {
9524 applyTextInput(cm, text.slice(same), prevInput.length - same,
9525 null, this$1.composing ? "*compose" : null);
9526
9527 // Don't leave long text in the textarea, since it makes further polling slow
9528 if (text.length > 1000 || text.indexOf("\n") > -1) { input.value = this$1.prevInput = ""; }
9529 else { this$1.prevInput = text; }
9530
9531 if (this$1.composing) {
9532 this$1.composing.range.clear();
9533 this$1.composing.range = cm.markText(this$1.composing.start, cm.getCursor("to"),
9534 {className: "CodeMirror-composing"});
9535 }
9536 });
9537 return true
9538 };
9539
9540 TextareaInput.prototype.ensurePolled = function () {
9541 if (this.pollingFast && this.poll()) { this.pollingFast = false; }
9542 };
9543
9544 TextareaInput.prototype.onKeyPress = function () {
9545 if (ie && ie_version >= 9) { this.hasSelection = null; }
9546 this.fastPoll();
9547 };
9548
9549 TextareaInput.prototype.onContextMenu = function (e) {
9550 var input = this, cm = input.cm, display = cm.display, te = input.textarea;
9551 if (input.contextMenuPending) { input.contextMenuPending(); }
9552 var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
9553 if (!pos || presto) { return } // Opera is difficult.
9554
9555 // Reset the current text selection only if the click is done outside of the selection
9556 // and 'resetSelectionOnContextMenu' option is true.
9557 var reset = cm.options.resetSelectionOnContextMenu;
9558 if (reset && cm.doc.sel.contains(pos) == -1)
9559 { operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); }
9560
9561 var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText;
9562 var wrapperBox = input.wrapper.offsetParent.getBoundingClientRect();
9563 input.wrapper.style.cssText = "position: static";
9564 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);";
9565 var oldScrollY;
9566 if (webkit) { oldScrollY = window.scrollY; } // Work around Chrome issue (#2712)
9567 display.input.focus();
9568 if (webkit) { window.scrollTo(null, oldScrollY); }
9569 display.input.reset();
9570 // Adds "Select all" to context menu in FF
9571 if (!cm.somethingSelected()) { te.value = input.prevInput = " "; }
9572 input.contextMenuPending = rehide;
9573 display.selForContextMenu = cm.doc.sel;
9574 clearTimeout(display.detectingSelectAll);
9575
9576 // Select-all will be greyed out if there's nothing to select, so
9577 // this adds a zero-width space so that we can later check whether
9578 // it got selected.
9579 function prepareSelectAllHack() {
9580 if (te.selectionStart != null) {
9581 var selected = cm.somethingSelected();
9582 var extval = "\u200b" + (selected ? te.value : "");
9583 te.value = "\u21da"; // Used to catch context-menu undo
9584 te.value = extval;
9585 input.prevInput = selected ? "" : "\u200b";
9586 te.selectionStart = 1; te.selectionEnd = extval.length;
9587 // Re-set this, in case some other handler touched the
9588 // selection in the meantime.
9589 display.selForContextMenu = cm.doc.sel;
9590 }
9591 }
9592 function rehide() {
9593 if (input.contextMenuPending != rehide) { return }
9594 input.contextMenuPending = false;
9595 input.wrapper.style.cssText = oldWrapperCSS;
9596 te.style.cssText = oldCSS;
9597 if (ie && ie_version < 9) { display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); }
9598
9599 // Try to detect the user choosing select-all
9600 if (te.selectionStart != null) {
9601 if (!ie || (ie && ie_version < 9)) { prepareSelectAllHack(); }
9602 var i = 0, poll = function () {
9603 if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 &&
9604 te.selectionEnd > 0 && input.prevInput == "\u200b") {
9605 operation(cm, selectAll)(cm);
9606 } else if (i++ < 10) {
9607 display.detectingSelectAll = setTimeout(poll, 500);
9608 } else {
9609 display.selForContextMenu = null;
9610 display.input.reset();
9611 }
9612 };
9613 display.detectingSelectAll = setTimeout(poll, 200);
9614 }
9615 }
9616
9617 if (ie && ie_version >= 9) { prepareSelectAllHack(); }
9618 if (captureRightClick) {
9619 e_stop(e);
9620 var mouseup = function () {
9621 off(window, "mouseup", mouseup);
9622 setTimeout(rehide, 20);
9623 };
9624 on(window, "mouseup", mouseup);
9625 } else {
9626 setTimeout(rehide, 50);
9627 }
9628 };
9629
9630 TextareaInput.prototype.readOnlyChanged = function (val) {
9631 if (!val) { this.reset(); }
9632 this.textarea.disabled = val == "nocursor";
9633 this.textarea.readOnly = !!val;
9634 };
9635
9636 TextareaInput.prototype.setUneditable = function () {};
9637
9638 TextareaInput.prototype.needsContentAttribute = false;
9639
9640 function fromTextArea(textarea, options) {
9641 options = options ? copyObj(options) : {};
9642 options.value = textarea.value;
9643 if (!options.tabindex && textarea.tabIndex)
9644 { options.tabindex = textarea.tabIndex; }
9645 if (!options.placeholder && textarea.placeholder)
9646 { options.placeholder = textarea.placeholder; }
9647 // Set autofocus to true if this textarea is focused, or if it has
9648 // autofocus and no other element is focused.
9649 if (options.autofocus == null) {
9650 var hasFocus = activeElt();
9651 options.autofocus = hasFocus == textarea ||
9652 textarea.getAttribute("autofocus") != null && hasFocus == document.body;
9653 }
9654
9655 function save() {textarea.value = cm.getValue();}
9656
9657 var realSubmit;
9658 if (textarea.form) {
9659 on(textarea.form, "submit", save);
9660 // Deplorable hack to make the submit method do the right thing.
9661 if (!options.leaveSubmitMethodAlone) {
9662 var form = textarea.form;
9663 realSubmit = form.submit;
9664 try {
9665 var wrappedSubmit = form.submit = function () {
9666 save();
9667 form.submit = realSubmit;
9668 form.submit();
9669 form.submit = wrappedSubmit;
9670 };
9671 } catch(e) {}
9672 }
9673 }
9674
9675 options.finishInit = function (cm) {
9676 cm.save = save;
9677 cm.getTextArea = function () { return textarea; };
9678 cm.toTextArea = function () {
9679 cm.toTextArea = isNaN; // Prevent this from being ran twice
9680 save();
9681 textarea.parentNode.removeChild(cm.getWrapperElement());
9682 textarea.style.display = "";
9683 if (textarea.form) {
9684 off(textarea.form, "submit", save);
9685 if (!options.leaveSubmitMethodAlone && typeof textarea.form.submit == "function")
9686 { textarea.form.submit = realSubmit; }
9687 }
9688 };
9689 };
9690
9691 textarea.style.display = "none";
9692 var cm = CodeMirror(function (node) { return textarea.parentNode.insertBefore(node, textarea.nextSibling); },
9693 options);
9694 return cm
9695 }
9696
9697 function addLegacyProps(CodeMirror) {
9698 CodeMirror.off = off;
9699 CodeMirror.on = on;
9700 CodeMirror.wheelEventPixels = wheelEventPixels;
9701 CodeMirror.Doc = Doc;
9702 CodeMirror.splitLines = splitLinesAuto;
9703 CodeMirror.countColumn = countColumn;
9704 CodeMirror.findColumn = findColumn;
9705 CodeMirror.isWordChar = isWordCharBasic;
9706 CodeMirror.Pass = Pass;
9707 CodeMirror.signal = signal;
9708 CodeMirror.Line = Line;
9709 CodeMirror.changeEnd = changeEnd;
9710 CodeMirror.scrollbarModel = scrollbarModel;
9711 CodeMirror.Pos = Pos;
9712 CodeMirror.cmpPos = cmp;
9713 CodeMirror.modes = modes;
9714 CodeMirror.mimeModes = mimeModes;
9715 CodeMirror.resolveMode = resolveMode;
9716 CodeMirror.getMode = getMode;
9717 CodeMirror.modeExtensions = modeExtensions;
9718 CodeMirror.extendMode = extendMode;
9719 CodeMirror.copyState = copyState;
9720 CodeMirror.startState = startState;
9721 CodeMirror.innerMode = innerMode;
9722 CodeMirror.commands = commands;
9723 CodeMirror.keyMap = keyMap;
9724 CodeMirror.keyName = keyName;
9725 CodeMirror.isModifierKey = isModifierKey;
9726 CodeMirror.lookupKey = lookupKey;
9727 CodeMirror.normalizeKeyMap = normalizeKeyMap;
9728 CodeMirror.StringStream = StringStream;
9729 CodeMirror.SharedTextMarker = SharedTextMarker;
9730 CodeMirror.TextMarker = TextMarker;
9731 CodeMirror.LineWidget = LineWidget;
9732 CodeMirror.e_preventDefault = e_preventDefault;
9733 CodeMirror.e_stopPropagation = e_stopPropagation;
9734 CodeMirror.e_stop = e_stop;
9735 CodeMirror.addClass = addClass;
9736 CodeMirror.contains = contains;
9737 CodeMirror.rmClass = rmClass;
9738 CodeMirror.keyNames = keyNames;
9739 }
9740
9741 // EDITOR CONSTRUCTOR
9742
9743 defineOptions(CodeMirror);
9744
9745 addEditorMethods(CodeMirror);
9746
9747 // Set up methods on CodeMirror's prototype to redirect to the editor's document.
9748 var dontDelegate = "iter insert remove copy getEditor constructor".split(" ");
9749 for (var prop in Doc.prototype) { if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
9750 { CodeMirror.prototype[prop] = (function(method) {
9751 return function() {return method.apply(this.doc, arguments)}
9752 })(Doc.prototype[prop]); } }
9753
9754 eventMixin(Doc);
9755 CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput};
9756
9757 // Extra arguments are stored as the mode's dependencies, which is
9758 // used by (legacy) mechanisms like loadmode.js to automatically
9759 // load a mode. (Preferred mechanism is the require/define calls.)
9760 CodeMirror.defineMode = function(name/*, mode, …*/) {
9761 if (!CodeMirror.defaults.mode && name != "null") { CodeMirror.defaults.mode = name; }
9762 defineMode.apply(this, arguments);
9763 };
9764
9765 CodeMirror.defineMIME = defineMIME;
9766
9767 // Minimal default mode.
9768 CodeMirror.defineMode("null", function () { return ({token: function (stream) { return stream.skipToEnd(); }}); });
9769 CodeMirror.defineMIME("text/plain", "null");
9770
9771 // EXTENSIONS
9772
9773 CodeMirror.defineExtension = function (name, func) {
9774 CodeMirror.prototype[name] = func;
9775 };
9776 CodeMirror.defineDocExtension = function (name, func) {
9777 Doc.prototype[name] = func;
9778 };
9779
9780 CodeMirror.fromTextArea = fromTextArea;
9781
9782 addLegacyProps(CodeMirror);
9783
9784 CodeMirror.version = "5.58.1";
9785
9786 return CodeMirror;
9787
9788})));