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1 // CodeMirror is the only global var we claim
2 window.CodeMirror = (function() {
3 "use strict";
4
5 // BROWSER SNIFFING
6
7 // Crude, but necessary to handle a number of hard-to-feature-detect
8 // bugs and behavior differences.
9 var gecko = /gecko\/\d/i.test(navigator.userAgent);
10 // IE11 currently doesn't count as 'ie', since it has almost none of
11 // the same bugs as earlier versions. Use ie_gt10 to handle
12 // incompatibilities in that version.
13 var old_ie = /MSIE \d/.test(navigator.userAgent);
14 var ie_lt8 = old_ie && (document.documentMode == null || document.documentMode < 8);
15 var ie_lt9 = old_ie && (document.documentMode == null || document.documentMode < 9);
16 var ie_gt10 = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent);
17 var ie = old_ie || ie_gt10;
18 var webkit = /WebKit\//.test(navigator.userAgent);
19 var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
20 var chrome = /Chrome\//.test(navigator.userAgent);
21 var opera = /Opera\//.test(navigator.userAgent);
22 var safari = /Apple Computer/.test(navigator.vendor);
23 var khtml = /KHTML\//.test(navigator.userAgent);
24 var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent);
25 var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
26 var phantom = /PhantomJS/.test(navigator.userAgent);
27
28 var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
29 // This is woefully incomplete. Suggestions for alternative methods welcome.
30 var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent);
31 var mac = ios || /Mac/.test(navigator.platform);
32 var windows = /win/i.test(navigator.platform);
33
34 var opera_version = opera && navigator.userAgent.match(/Version\/(\d*\.\d*)/);
35 if (opera_version) opera_version = Number(opera_version[1]);
36 if (opera_version && opera_version >= 15) { opera = false; webkit = true; }
37 // Some browsers use the wrong event properties to signal cmd/ctrl on OS X
38 var flipCtrlCmd = mac && (qtwebkit || opera && (opera_version == null || opera_version < 12.11));
39 var captureMiddleClick = gecko || (ie && !ie_lt9);
40
41 // Optimize some code when these features are not used
42 var sawReadOnlySpans = false, sawCollapsedSpans = false;
43
44 // CONSTRUCTOR
45
46 function CodeMirror(place, options) {
47 if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
48
49 this.options = options = options || {};
50 // Determine effective options based on given values and defaults.
51 for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt))
52 options[opt] = defaults[opt];
53 setGuttersForLineNumbers(options);
54
55 var docStart = typeof options.value == "string" ? 0 : options.value.first;
56 var display = this.display = makeDisplay(place, docStart);
57 display.wrapper.CodeMirror = this;
58 updateGutters(this);
59 if (options.autofocus && !mobile) focusInput(this);
60
61 this.state = {keyMaps: [],
62 overlays: [],
63 modeGen: 0,
64 overwrite: false, focused: false,
65 suppressEdits: false,
66 pasteIncoming: false, cutIncoming: false,
67 draggingText: false,
68 highlight: new Delayed()};
69
70 themeChanged(this);
71 if (options.lineWrapping)
72 this.display.wrapper.className += " CodeMirror-wrap";
73
74 var doc = options.value;
75 if (typeof doc == "string") doc = new Doc(options.value, options.mode);
76 operation(this, attachDoc)(this, doc);
77
78 // Override magic textarea content restore that IE sometimes does
79 // on our hidden textarea on reload
80 if (old_ie) setTimeout(bind(resetInput, this, true), 20);
81
82 registerEventHandlers(this);
83 // IE throws unspecified error in certain cases, when
84 // trying to access activeElement before onload
85 var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { }
86 if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20);
87 else onBlur(this);
88
89 operation(this, function() {
90 for (var opt in optionHandlers)
91 if (optionHandlers.propertyIsEnumerable(opt))
92 optionHandlers[opt](this, options[opt], Init);
93 for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
94 })();
95 }
96
97 // DISPLAY CONSTRUCTOR
98
99 function makeDisplay(place, docStart) {
100 var d = {};
101
102 var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none");
103 if (webkit) input.style.width = "1000px";
104 else input.setAttribute("wrap", "off");
105 // if border: 0; -- iOS fails to open keyboard (issue #1287)
106 if (ios) input.style.border = "1px solid black";
107 input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false");
108
109 // Wraps and hides input textarea
110 d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
111 // The actual fake scrollbars.
112 d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar");
113 d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar");
114 d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
115 d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler");
116 // DIVs containing the selection and the actual code
117 d.lineDiv = elt("div", null, "CodeMirror-code");
118 d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
119 // Blinky cursor, and element used to ensure cursor fits at the end of a line
120 d.cursor = elt("div", "\u00a0", "CodeMirror-cursor");
121 // Secondary cursor, shown when on a 'jump' in bi-directional text
122 d.otherCursor = elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor");
123 // Used to measure text size
124 d.measure = elt("div", null, "CodeMirror-measure");
125 // Wraps everything that needs to exist inside the vertically-padded coordinate system
126 d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor],
127 null, "position: relative; outline: none");
128 // Moved around its parent to cover visible view
129 d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
130 // Set to the height of the text, causes scrolling
131 d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
132 // D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers
133 d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerCutOff + "px; width: 1px;");
134 // Will contain the gutters, if any
135 d.gutters = elt("div", null, "CodeMirror-gutters");
136 d.lineGutter = null;
137 // Provides scrolling
138 d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll");
139 d.scroller.setAttribute("tabIndex", "-1");
140 // The element in which the editor lives.
141 d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV,
142 d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror");
143 // Work around IE7 z-index bug
144 if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
145 if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper);
146
147 // Needed to hide big blue blinking cursor on Mobile Safari
148 if (ios) input.style.width = "0px";
149 if (!webkit) d.scroller.draggable = true;
150 // Needed to handle Tab key in KHTML
151 if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; }
152 // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
153 else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px";
154
155 // Current visible range (may be bigger than the view window).
156 d.viewOffset = d.lastSizeC = 0;
157 d.showingFrom = d.showingTo = docStart;
158
159 // Used to only resize the line number gutter when necessary (when
160 // the amount of lines crosses a boundary that makes its width change)
161 d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
162 // See readInput and resetInput
163 d.prevInput = "";
164 // Set to true when a non-horizontal-scrolling widget is added. As
165 // an optimization, widget aligning is skipped when d is false.
166 d.alignWidgets = false;
167 // Flag that indicates whether we currently expect input to appear
168 // (after some event like 'keypress' or 'input') and are polling
169 // intensively.
170 d.pollingFast = false;
171 // Self-resetting timeout for the poller
172 d.poll = new Delayed();
173
174 d.cachedCharWidth = d.cachedTextHeight = null;
175 d.measureLineCache = [];
176 d.measureLineCachePos = 0;
177
178 // Tracks when resetInput has punted to just putting a short
179 // string instead of the (large) selection.
180 d.inaccurateSelection = false;
181
182 // Tracks the maximum line length so that the horizontal scrollbar
183 // can be kept static when scrolling.
184 d.maxLine = null;
185 d.maxLineLength = 0;
186 d.maxLineChanged = false;
187
188 // Used for measuring wheel scrolling granularity
189 d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null;
190
191 return d;
192 }
193
194 // STATE UPDATES
195
196 // Used to get the editor into a consistent state again when options change.
197
198 function loadMode(cm) {
199 cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption);
200 resetModeState(cm);
201 }
202
203 function resetModeState(cm) {
204 cm.doc.iter(function(line) {
205 if (line.stateAfter) line.stateAfter = null;
206 if (line.styles) line.styles = null;
207 });
208 cm.doc.frontier = cm.doc.first;
209 startWorker(cm, 100);
210 cm.state.modeGen++;
211 if (cm.curOp) regChange(cm);
212 }
213
214 function wrappingChanged(cm) {
215 if (cm.options.lineWrapping) {
216 cm.display.wrapper.className += " CodeMirror-wrap";
217 cm.display.sizer.style.minWidth = "";
218 } else {
219 cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", "");
220 computeMaxLength(cm);
221 }
222 estimateLineHeights(cm);
223 regChange(cm);
224 clearCaches(cm);
225 setTimeout(function(){updateScrollbars(cm);}, 100);
226 }
227
228 function estimateHeight(cm) {
229 var th = textHeight(cm.display), wrapping = cm.options.lineWrapping;
230 var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3);
231 return function(line) {
232 if (lineIsHidden(cm.doc, line))
233 return 0;
234 else if (wrapping)
235 return (Math.ceil(line.text.length / perLine) || 1) * th;
236 else
237 return th;
238 };
239 }
240
241 function estimateLineHeights(cm) {
242 var doc = cm.doc, est = estimateHeight(cm);
243 doc.iter(function(line) {
244 var estHeight = est(line);
245 if (estHeight != line.height) updateLineHeight(line, estHeight);
246 });
247 }
248
249 function keyMapChanged(cm) {
250 var map = keyMap[cm.options.keyMap], style = map.style;
251 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") +
252 (style ? " cm-keymap-" + style : "");
253 }
254
255 function themeChanged(cm) {
256 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
257 cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
258 clearCaches(cm);
259 }
260
261 function guttersChanged(cm) {
262 updateGutters(cm);
263 regChange(cm);
264 setTimeout(function(){alignHorizontally(cm);}, 20);
265 }
266
267 function updateGutters(cm) {
268 var gutters = cm.display.gutters, specs = cm.options.gutters;
269 removeChildren(gutters);
270 for (var i = 0; i < specs.length; ++i) {
271 var gutterClass = specs[i];
272 var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
273 if (gutterClass == "CodeMirror-linenumbers") {
274 cm.display.lineGutter = gElt;
275 gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
276 }
277 }
278 gutters.style.display = i ? "" : "none";
279 }
280
281 function lineLength(doc, line) {
282 if (line.height == 0) return 0;
283 var len = line.text.length, merged, cur = line;
284 while (merged = collapsedSpanAtStart(cur)) {
285 var found = merged.find();
286 cur = getLine(doc, found.from.line);
287 len += found.from.ch - found.to.ch;
288 }
289 cur = line;
290 while (merged = collapsedSpanAtEnd(cur)) {
291 var found = merged.find();
292 len -= cur.text.length - found.from.ch;
293 cur = getLine(doc, found.to.line);
294 len += cur.text.length - found.to.ch;
295 }
296 return len;
297 }
298
299 function computeMaxLength(cm) {
300 var d = cm.display, doc = cm.doc;
301 d.maxLine = getLine(doc, doc.first);
302 d.maxLineLength = lineLength(doc, d.maxLine);
303 d.maxLineChanged = true;
304 doc.iter(function(line) {
305 var len = lineLength(doc, line);
306 if (len > d.maxLineLength) {
307 d.maxLineLength = len;
308 d.maxLine = line;
309 }
310 });
311 }
312
313 // Make sure the gutters options contains the element
314 // "CodeMirror-linenumbers" when the lineNumbers option is true.
315 function setGuttersForLineNumbers(options) {
316 var found = indexOf(options.gutters, "CodeMirror-linenumbers");
317 if (found == -1 && options.lineNumbers) {
318 options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]);
319 } else if (found > -1 && !options.lineNumbers) {
320 options.gutters = options.gutters.slice(0);
321 options.gutters.splice(found, 1);
322 }
323 }
324
325 // SCROLLBARS
326
327 // Re-synchronize the fake scrollbars with the actual size of the
328 // content. Optionally force a scrollTop.
329 function updateScrollbars(cm) {
330 var d = cm.display, docHeight = cm.doc.height;
331 var totalHeight = docHeight + paddingVert(d);
332 d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px";
333 d.gutters.style.height = Math.max(totalHeight, d.scroller.clientHeight - scrollerCutOff) + "px";
334 var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight);
335 var needsH = d.scroller.scrollWidth > (d.scroller.clientWidth + 1);
336 var needsV = scrollHeight > (d.scroller.clientHeight + 1);
337 if (needsV) {
338 d.scrollbarV.style.display = "block";
339 d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0";
340 // A bug in IE8 can cause this value to be negative, so guard it.
341 d.scrollbarV.firstChild.style.height =
342 Math.max(0, scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px";
343 } else {
344 d.scrollbarV.style.display = "";
345 d.scrollbarV.firstChild.style.height = "0";
346 }
347 if (needsH) {
348 d.scrollbarH.style.display = "block";
349 d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0";
350 d.scrollbarH.firstChild.style.width =
351 (d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px";
352 } else {
353 d.scrollbarH.style.display = "";
354 d.scrollbarH.firstChild.style.width = "0";
355 }
356 if (needsH && needsV) {
357 d.scrollbarFiller.style.display = "block";
358 d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px";
359 } else d.scrollbarFiller.style.display = "";
360 if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) {
361 d.gutterFiller.style.display = "block";
362 d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px";
363 d.gutterFiller.style.width = d.gutters.offsetWidth + "px";
364 } else d.gutterFiller.style.display = "";
365
366 if (mac_geLion && scrollbarWidth(d.measure) === 0) {
367 d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px";
368 d.scrollbarV.style.pointerEvents = d.scrollbarH.style.pointerEvents = "none";
369 }
370 }
371
372 function visibleLines(display, doc, viewPort) {
373 var top = display.scroller.scrollTop, height = display.wrapper.clientHeight;
374 if (typeof viewPort == "number") top = viewPort;
375 else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;}
376 top = Math.floor(top - paddingTop(display));
377 var bottom = Math.ceil(top + height);
378 return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)};
379 }
380
381 // LINE NUMBERS
382
383 function alignHorizontally(cm) {
384 var display = cm.display;
385 if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return;
386 var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft;
387 var gutterW = display.gutters.offsetWidth, l = comp + "px";
388 for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) {
389 for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l;
390 }
391 if (cm.options.fixedGutter)
392 display.gutters.style.left = (comp + gutterW) + "px";
393 }
394
395 function maybeUpdateLineNumberWidth(cm) {
396 if (!cm.options.lineNumbers) return false;
397 var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display;
398 if (last.length != display.lineNumChars) {
399 var test = display.measure.appendChild(elt("div", [elt("div", last)],
400 "CodeMirror-linenumber CodeMirror-gutter-elt"));
401 var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
402 display.lineGutter.style.width = "";
403 display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding);
404 display.lineNumWidth = display.lineNumInnerWidth + padding;
405 display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
406 display.lineGutter.style.width = display.lineNumWidth + "px";
407 return true;
408 }
409 return false;
410 }
411
412 function lineNumberFor(options, i) {
413 return String(options.lineNumberFormatter(i + options.firstLineNumber));
414 }
415 function compensateForHScroll(display) {
416 return getRect(display.scroller).left - getRect(display.sizer).left;
417 }
418
419 // DISPLAY DRAWING
420
421 function updateDisplay(cm, changes, viewPort, forced) {
422 var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo, updated;
423 var visible = visibleLines(cm.display, cm.doc, viewPort);
424 for (var first = true;; first = false) {
425 var oldWidth = cm.display.scroller.clientWidth;
426 if (!updateDisplayInner(cm, changes, visible, forced)) break;
427 updated = true;
428 changes = [];
429 updateSelection(cm);
430 updateScrollbars(cm);
431 if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.clientWidth) {
432 forced = true;
433 continue;
434 }
435 forced = false;
436
437 // Clip forced viewport to actual scrollable area
438 if (viewPort)
439 viewPort = Math.min(cm.display.scroller.scrollHeight - cm.display.scroller.clientHeight,
440 typeof viewPort == "number" ? viewPort : viewPort.top);
441 visible = visibleLines(cm.display, cm.doc, viewPort);
442 if (visible.from >= cm.display.showingFrom && visible.to <= cm.display.showingTo)
443 break;
444 }
445
446 if (updated) {
447 signalLater(cm, "update", cm);
448 if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo)
449 signalLater(cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo);
450 }
451 return updated;
452 }
453
454 // Uses a set of changes plus the current scroll position to
455 // determine which DOM updates have to be made, and makes the
456 // updates.
457 function updateDisplayInner(cm, changes, visible, forced) {
458 var display = cm.display, doc = cm.doc;
459 if (!display.wrapper.offsetWidth) {
460 display.showingFrom = display.showingTo = doc.first;
461 display.viewOffset = 0;
462 return;
463 }
464
465 // Bail out if the visible area is already rendered and nothing changed.
466 if (!forced && changes.length == 0 &&
467 visible.from > display.showingFrom && visible.to < display.showingTo)
468 return;
469
470 if (maybeUpdateLineNumberWidth(cm))
471 changes = [{from: doc.first, to: doc.first + doc.size}];
472 var gutterW = display.sizer.style.marginLeft = display.gutters.offsetWidth + "px";
473 display.scrollbarH.style.left = cm.options.fixedGutter ? gutterW : "0";
474
475 // Used to determine which lines need their line numbers updated
476 var positionsChangedFrom = Infinity;
477 if (cm.options.lineNumbers)
478 for (var i = 0; i < changes.length; ++i)
479 if (changes[i].diff && changes[i].from < positionsChangedFrom) { positionsChangedFrom = changes[i].from; }
480
481 var end = doc.first + doc.size;
482 var from = Math.max(visible.from - cm.options.viewportMargin, doc.first);
483 var to = Math.min(end, visible.to + cm.options.viewportMargin);
484 if (display.showingFrom < from && from - display.showingFrom < 20) from = Math.max(doc.first, display.showingFrom);
485 if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(end, display.showingTo);
486 if (sawCollapsedSpans) {
487 from = lineNo(visualLine(doc, getLine(doc, from)));
488 while (to < end && lineIsHidden(doc, getLine(doc, to))) ++to;
489 }
490
491 // Create a range of theoretically intact lines, and punch holes
492 // in that using the change info.
493 var intact = [{from: Math.max(display.showingFrom, doc.first),
494 to: Math.min(display.showingTo, end)}];
495 if (intact[0].from >= intact[0].to) intact = [];
496 else intact = computeIntact(intact, changes);
497 // When merged lines are present, we might have to reduce the
498 // intact ranges because changes in continued fragments of the
499 // intact lines do require the lines to be redrawn.
500 if (sawCollapsedSpans)
501 for (var i = 0; i < intact.length; ++i) {
502 var range = intact[i], merged;
503 while (merged = collapsedSpanAtEnd(getLine(doc, range.to - 1))) {
504 var newTo = merged.find().from.line;
505 if (newTo > range.from) range.to = newTo;
506 else { intact.splice(i--, 1); break; }
507 }
508 }
509
510 // Clip off the parts that won't be visible
511 var intactLines = 0;
512 for (var i = 0; i < intact.length; ++i) {
513 var range = intact[i];
514 if (range.from < from) range.from = from;
515 if (range.to > to) range.to = to;
516 if (range.from >= range.to) intact.splice(i--, 1);
517 else intactLines += range.to - range.from;
518 }
519 if (!forced && intactLines == to - from && from == display.showingFrom && to == display.showingTo) {
520 updateViewOffset(cm);
521 return;
522 }
523 intact.sort(function(a, b) {return a.from - b.from;});
524
525 // Avoid crashing on IE's "unspecified error" when in iframes
526 try {
527 var focused = document.activeElement;
528 } catch(e) {}
529 if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none";
530 patchDisplay(cm, from, to, intact, positionsChangedFrom);
531 display.lineDiv.style.display = "";
532 if (focused && document.activeElement != focused && focused.offsetHeight) focused.focus();
533
534 var different = from != display.showingFrom || to != display.showingTo ||
535 display.lastSizeC != display.wrapper.clientHeight;
536 // This is just a bogus formula that detects when the editor is
537 // resized or the font size changes.
538 if (different) {
539 display.lastSizeC = display.wrapper.clientHeight;
540 startWorker(cm, 400);
541 }
542 display.showingFrom = from; display.showingTo = to;
543
544 display.gutters.style.height = "";
545 updateHeightsInViewport(cm);
546 updateViewOffset(cm);
547
548 return true;
549 }
550
551 function updateHeightsInViewport(cm) {
552 var display = cm.display;
553 var prevBottom = display.lineDiv.offsetTop;
554 for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) {
555 if (ie_lt8) {
556 var bot = node.offsetTop + node.offsetHeight;
557 height = bot - prevBottom;
558 prevBottom = bot;
559 } else {
560 var box = getRect(node);
561 height = box.bottom - box.top;
562 }
563 var diff = node.lineObj.height - height;
564 if (height < 2) height = textHeight(display);
565 if (diff > .001 || diff < -.001) {
566 updateLineHeight(node.lineObj, height);
567 var widgets = node.lineObj.widgets;
568 if (widgets) for (var i = 0; i < widgets.length; ++i)
569 widgets[i].height = widgets[i].node.offsetHeight;
570 }
571 }
572 }
573
574 function updateViewOffset(cm) {
575 var off = cm.display.viewOffset = heightAtLine(cm, getLine(cm.doc, cm.display.showingFrom));
576 // Position the mover div to align with the current virtual scroll position
577 cm.display.mover.style.top = off + "px";
578 }
579
580 function computeIntact(intact, changes) {
581 for (var i = 0, l = changes.length || 0; i < l; ++i) {
582 var change = changes[i], intact2 = [], diff = change.diff || 0;
583 for (var j = 0, l2 = intact.length; j < l2; ++j) {
584 var range = intact[j];
585 if (change.to <= range.from && change.diff) {
586 intact2.push({from: range.from + diff, to: range.to + diff});
587 } else if (change.to <= range.from || change.from >= range.to) {
588 intact2.push(range);
589 } else {
590 if (change.from > range.from)
591 intact2.push({from: range.from, to: change.from});
592 if (change.to < range.to)
593 intact2.push({from: change.to + diff, to: range.to + diff});
594 }
595 }
596 intact = intact2;
597 }
598 return intact;
599 }
600
601 function getDimensions(cm) {
602 var d = cm.display, left = {}, width = {};
603 for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
604 left[cm.options.gutters[i]] = n.offsetLeft;
605 width[cm.options.gutters[i]] = n.offsetWidth;
606 }
607 return {fixedPos: compensateForHScroll(d),
608 gutterTotalWidth: d.gutters.offsetWidth,
609 gutterLeft: left,
610 gutterWidth: width,
611 wrapperWidth: d.wrapper.clientWidth};
612 }
613
614 function patchDisplay(cm, from, to, intact, updateNumbersFrom) {
615 var dims = getDimensions(cm);
616 var display = cm.display, lineNumbers = cm.options.lineNumbers;
617 if (!intact.length && (!webkit || !cm.display.currentWheelTarget))
618 removeChildren(display.lineDiv);
619 var container = display.lineDiv, cur = container.firstChild;
620
621 function rm(node) {
622 var next = node.nextSibling;
623 if (webkit && mac && cm.display.currentWheelTarget == node) {
624 node.style.display = "none";
625 node.lineObj = null;
626 } else {
627 node.parentNode.removeChild(node);
628 }
629 return next;
630 }
631
632 var nextIntact = intact.shift(), lineN = from;
633 cm.doc.iter(from, to, function(line) {
634 if (nextIntact && nextIntact.to == lineN) nextIntact = intact.shift();
635 if (lineIsHidden(cm.doc, line)) {
636 if (line.height != 0) updateLineHeight(line, 0);
637 if (line.widgets && cur && cur.previousSibling) for (var i = 0; i < line.widgets.length; ++i) {
638 var w = line.widgets[i];
639 if (w.showIfHidden) {
640 var prev = cur.previousSibling;
641 if (/pre/i.test(prev.nodeName)) {
642 var wrap = elt("div", null, null, "position: relative");
643 prev.parentNode.replaceChild(wrap, prev);
644 wrap.appendChild(prev);
645 prev = wrap;
646 }
647 var wnode = prev.appendChild(elt("div", [w.node], "CodeMirror-linewidget"));
648 if (!w.handleMouseEvents) wnode.ignoreEvents = true;
649 positionLineWidget(w, wnode, prev, dims);
650 }
651 }
652 } else if (nextIntact && nextIntact.from <= lineN && nextIntact.to > lineN) {
653 // This line is intact. Skip to the actual node. Update its
654 // line number if needed.
655 while (cur.lineObj != line) cur = rm(cur);
656 if (lineNumbers && updateNumbersFrom <= lineN && cur.lineNumber)
657 setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineN));
658 cur = cur.nextSibling;
659 } else {
660 // For lines with widgets, make an attempt to find and reuse
661 // the existing element, so that widgets aren't needlessly
662 // removed and re-inserted into the dom
663 if (line.widgets) for (var j = 0, search = cur, reuse; search && j < 20; ++j, search = search.nextSibling)
664 if (search.lineObj == line && /div/i.test(search.nodeName)) { reuse = search; break; }
665 // This line needs to be generated.
666 var lineNode = buildLineElement(cm, line, lineN, dims, reuse);
667 if (lineNode != reuse) {
668 container.insertBefore(lineNode, cur);
669 } else {
670 while (cur != reuse) cur = rm(cur);
671 cur = cur.nextSibling;
672 }
673
674 lineNode.lineObj = line;
675 }
676 ++lineN;
677 });
678 while (cur) cur = rm(cur);
679 }
680
681 function buildLineElement(cm, line, lineNo, dims, reuse) {
682 var built = buildLineContent(cm, line), lineElement = built.pre;
683 var markers = line.gutterMarkers, display = cm.display, wrap;
684
685 var bgClass = built.bgClass ? built.bgClass + " " + (line.bgClass || "") : line.bgClass;
686 if (!cm.options.lineNumbers && !markers && !bgClass && !line.wrapClass && !line.widgets)
687 return lineElement;
688
689 // Lines with gutter elements, widgets or a background class need
690 // to be wrapped again, and have the extra elements added to the
691 // wrapper div
692
693 if (reuse) {
694 reuse.alignable = null;
695 var isOk = true, widgetsSeen = 0, insertBefore = null;
696 for (var n = reuse.firstChild, next; n; n = next) {
697 next = n.nextSibling;
698 if (!/\bCodeMirror-linewidget\b/.test(n.className)) {
699 reuse.removeChild(n);
700 } else {
701 for (var i = 0; i < line.widgets.length; ++i) {
702 var widget = line.widgets[i];
703 if (widget.node == n.firstChild) {
704 if (!widget.above && !insertBefore) insertBefore = n;
705 positionLineWidget(widget, n, reuse, dims);
706 ++widgetsSeen;
707 break;
708 }
709 }
710 if (i == line.widgets.length) { isOk = false; break; }
711 }
712 }
713 reuse.insertBefore(lineElement, insertBefore);
714 if (isOk && widgetsSeen == line.widgets.length) {
715 wrap = reuse;
716 reuse.className = line.wrapClass || "";
717 }
718 }
719 if (!wrap) {
720 wrap = elt("div", null, line.wrapClass, "position: relative");
721 wrap.appendChild(lineElement);
722 }
723 // Kludge to make sure the styled element lies behind the selection (by z-index)
724 if (bgClass)
725 wrap.insertBefore(elt("div", null, bgClass + " CodeMirror-linebackground"), wrap.firstChild);
726 if (cm.options.lineNumbers || markers) {
727 var gutterWrap = wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "position: absolute; left: " +
728 (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"),
729 lineElement);
730 if (cm.options.fixedGutter) (wrap.alignable || (wrap.alignable = [])).push(gutterWrap);
731 if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
732 wrap.lineNumber = gutterWrap.appendChild(
733 elt("div", lineNumberFor(cm.options, lineNo),
734 "CodeMirror-linenumber CodeMirror-gutter-elt",
735 "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
736 + display.lineNumInnerWidth + "px"));
737 if (markers)
738 for (var k = 0; k < cm.options.gutters.length; ++k) {
739 var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
740 if (found)
741 gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
742 dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
743 }
744 }
745 if (ie_lt8) wrap.style.zIndex = 2;
746 if (line.widgets && wrap != reuse) for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
747 var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
748 if (!widget.handleMouseEvents) node.ignoreEvents = true;
749 positionLineWidget(widget, node, wrap, dims);
750 if (widget.above)
751 wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement);
752 else
753 wrap.appendChild(node);
754 signalLater(widget, "redraw");
755 }
756 return wrap;
757 }
758
759 function positionLineWidget(widget, node, wrap, dims) {
760 if (widget.noHScroll) {
761 (wrap.alignable || (wrap.alignable = [])).push(node);
762 var width = dims.wrapperWidth;
763 node.style.left = dims.fixedPos + "px";
764 if (!widget.coverGutter) {
765 width -= dims.gutterTotalWidth;
766 node.style.paddingLeft = dims.gutterTotalWidth + "px";
767 }
768 node.style.width = width + "px";
769 }
770 if (widget.coverGutter) {
771 node.style.zIndex = 5;
772 node.style.position = "relative";
773 if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
774 }
775 }
776
777 // SELECTION / CURSOR
778
779 function updateSelection(cm) {
780 var display = cm.display;
781 var collapsed = posEq(cm.doc.sel.from, cm.doc.sel.to);
782 if (collapsed || cm.options.showCursorWhenSelecting)
783 updateSelectionCursor(cm);
784 else
785 display.cursor.style.display = display.otherCursor.style.display = "none";
786 if (!collapsed)
787 updateSelectionRange(cm);
788 else
789 display.selectionDiv.style.display = "none";
790
791 // Move the hidden textarea near the cursor to prevent scrolling artifacts
792 if (cm.options.moveInputWithCursor) {
793 var headPos = cursorCoords(cm, cm.doc.sel.head, "div");
794 var wrapOff = getRect(display.wrapper), lineOff = getRect(display.lineDiv);
795 display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
796 headPos.top + lineOff.top - wrapOff.top)) + "px";
797 display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
798 headPos.left + lineOff.left - wrapOff.left)) + "px";
799 }
800 }
801
802 // No selection, plain cursor
803 function updateSelectionCursor(cm) {
804 var display = cm.display, pos = cursorCoords(cm, cm.doc.sel.head, "div");
805 display.cursor.style.left = pos.left + "px";
806 display.cursor.style.top = pos.top + "px";
807 display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
808 display.cursor.style.display = "";
809
810 if (pos.other) {
811 display.otherCursor.style.display = "";
812 display.otherCursor.style.left = pos.other.left + "px";
813 display.otherCursor.style.top = pos.other.top + "px";
814 display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
815 } else { display.otherCursor.style.display = "none"; }
816 }
817
818 // Highlight selection
819 function updateSelectionRange(cm) {
820 var display = cm.display, doc = cm.doc, sel = cm.doc.sel;
821 var fragment = document.createDocumentFragment();
822 var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display);
823
824 function add(left, top, width, bottom) {
825 if (top < 0) top = 0;
826 fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
827 "px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) +
828 "px; height: " + (bottom - top) + "px"));
829 }
830
831 function drawForLine(line, fromArg, toArg) {
832 var lineObj = getLine(doc, line);
833 var lineLen = lineObj.text.length;
834 var start, end;
835 function coords(ch, bias) {
836 return charCoords(cm, Pos(line, ch), "div", lineObj, bias);
837 }
838
839 iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
840 var leftPos = coords(from, "left"), rightPos, left, right;
841 if (from == to) {
842 rightPos = leftPos;
843 left = right = leftPos.left;
844 } else {
845 rightPos = coords(to - 1, "right");
846 if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; }
847 left = leftPos.left;
848 right = rightPos.right;
849 }
850 if (fromArg == null && from == 0) left = pl;
851 if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
852 add(left, leftPos.top, null, leftPos.bottom);
853 left = pl;
854 if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
855 }
856 if (toArg == null && to == lineLen) right = clientWidth;
857 if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left)
858 start = leftPos;
859 if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right)
860 end = rightPos;
861 if (left < pl + 1) left = pl;
862 add(left, rightPos.top, right - left, rightPos.bottom);
863 });
864 return {start: start, end: end};
865 }
866
867 if (sel.from.line == sel.to.line) {
868 drawForLine(sel.from.line, sel.from.ch, sel.to.ch);
869 } else {
870 var fromLine = getLine(doc, sel.from.line), toLine = getLine(doc, sel.to.line);
871 var singleVLine = visualLine(doc, fromLine) == visualLine(doc, toLine);
872 var leftEnd = drawForLine(sel.from.line, sel.from.ch, singleVLine ? fromLine.text.length : null).end;
873 var rightStart = drawForLine(sel.to.line, singleVLine ? 0 : null, sel.to.ch).start;
874 if (singleVLine) {
875 if (leftEnd.top < rightStart.top - 2) {
876 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom);
877 add(pl, rightStart.top, rightStart.left, rightStart.bottom);
878 } else {
879 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom);
880 }
881 }
882 if (leftEnd.bottom < rightStart.top)
883 add(pl, leftEnd.bottom, null, rightStart.top);
884 }
885
886 removeChildrenAndAdd(display.selectionDiv, fragment);
887 display.selectionDiv.style.display = "";
888 }
889
890 // Cursor-blinking
891 function restartBlink(cm) {
892 if (!cm.state.focused) return;
893 var display = cm.display;
894 clearInterval(display.blinker);
895 var on = true;
896 display.cursor.style.visibility = display.otherCursor.style.visibility = "";
897 if (cm.options.cursorBlinkRate > 0)
898 display.blinker = setInterval(function() {
899 display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden";
900 }, cm.options.cursorBlinkRate);
901 }
902
903 // HIGHLIGHT WORKER
904
905 function startWorker(cm, time) {
906 if (cm.doc.mode.startState && cm.doc.frontier < cm.display.showingTo)
907 cm.state.highlight.set(time, bind(highlightWorker, cm));
908 }
909
910 function highlightWorker(cm) {
911 var doc = cm.doc;
912 if (doc.frontier < doc.first) doc.frontier = doc.first;
913 if (doc.frontier >= cm.display.showingTo) return;
914 var end = +new Date + cm.options.workTime;
915 var state = copyState(doc.mode, getStateBefore(cm, doc.frontier));
916 var changed = [], prevChange;
917 doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.showingTo + 500), function(line) {
918 if (doc.frontier >= cm.display.showingFrom) { // Visible
919 var oldStyles = line.styles;
920 line.styles = highlightLine(cm, line, state, true);
921 var ischange = !oldStyles || oldStyles.length != line.styles.length;
922 for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i];
923 if (ischange) {
924 if (prevChange && prevChange.end == doc.frontier) prevChange.end++;
925 else changed.push(prevChange = {start: doc.frontier, end: doc.frontier + 1});
926 }
927 line.stateAfter = copyState(doc.mode, state);
928 } else {
929 processLine(cm, line.text, state);
930 line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null;
931 }
932 ++doc.frontier;
933 if (+new Date > end) {
934 startWorker(cm, cm.options.workDelay);
935 return true;
936 }
937 });
938 if (changed.length)
939 operation(cm, function() {
940 for (var i = 0; i < changed.length; ++i)
941 regChange(this, changed[i].start, changed[i].end);
942 })();
943 }
944
945 // Finds the line to start with when starting a parse. Tries to
946 // find a line with a stateAfter, so that it can start with a
947 // valid state. If that fails, it returns the line with the
948 // smallest indentation, which tends to need the least context to
949 // parse correctly.
950 function findStartLine(cm, n, precise) {
951 var minindent, minline, doc = cm.doc;
952 var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100);
953 for (var search = n; search > lim; --search) {
954 if (search <= doc.first) return doc.first;
955 var line = getLine(doc, search - 1);
956 if (line.stateAfter && (!precise || search <= doc.frontier)) return search;
957 var indented = countColumn(line.text, null, cm.options.tabSize);
958 if (minline == null || minindent > indented) {
959 minline = search - 1;
960 minindent = indented;
961 }
962 }
963 return minline;
964 }
965
966 function getStateBefore(cm, n, precise) {
967 var doc = cm.doc, display = cm.display;
968 if (!doc.mode.startState) return true;
969 var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter;
970 if (!state) state = startState(doc.mode);
971 else state = copyState(doc.mode, state);
972 doc.iter(pos, n, function(line) {
973 processLine(cm, line.text, state);
974 var save = pos == n - 1 || pos % 5 == 0 || pos >= display.showingFrom && pos < display.showingTo;
975 line.stateAfter = save ? copyState(doc.mode, state) : null;
976 ++pos;
977 });
978 if (precise) doc.frontier = pos;
979 return state;
980 }
981
982 // POSITION MEASUREMENT
983
984 function paddingTop(display) {return display.lineSpace.offsetTop;}
985 function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;}
986 function paddingLeft(display) {
987 var e = removeChildrenAndAdd(display.measure, elt("pre", null, null, "text-align: left")).appendChild(elt("span", "x"));
988 return e.offsetLeft;
989 }
990
991 function measureChar(cm, line, ch, data, bias) {
992 var dir = -1;
993 data = data || measureLine(cm, line);
994 if (data.crude) {
995 var left = data.left + ch * data.width;
996 return {left: left, right: left + data.width, top: data.top, bottom: data.bottom};
997 }
998
999 for (var pos = ch;; pos += dir) {
1000 var r = data[pos];
1001 if (r) break;
1002 if (dir < 0 && pos == 0) dir = 1;
1003 }
1004 bias = pos > ch ? "left" : pos < ch ? "right" : bias;
1005 if (bias == "left" && r.leftSide) r = r.leftSide;
1006 else if (bias == "right" && r.rightSide) r = r.rightSide;
1007 return {left: pos < ch ? r.right : r.left,
1008 right: pos > ch ? r.left : r.right,
1009 top: r.top,
1010 bottom: r.bottom};
1011 }
1012
1013 function findCachedMeasurement(cm, line) {
1014 var cache = cm.display.measureLineCache;
1015 for (var i = 0; i < cache.length; ++i) {
1016 var memo = cache[i];
1017 if (memo.text == line.text && memo.markedSpans == line.markedSpans &&
1018 cm.display.scroller.clientWidth == memo.width &&
1019 memo.classes == line.textClass + "|" + line.wrapClass)
1020 return memo;
1021 }
1022 }
1023
1024 function clearCachedMeasurement(cm, line) {
1025 var exists = findCachedMeasurement(cm, line);
1026 if (exists) exists.text = exists.measure = exists.markedSpans = null;
1027 }
1028
1029 function measureLine(cm, line) {
1030 // First look in the cache
1031 var cached = findCachedMeasurement(cm, line);
1032 if (cached) return cached.measure;
1033
1034 // Failing that, recompute and store result in cache
1035 var measure = measureLineInner(cm, line);
1036 var cache = cm.display.measureLineCache;
1037 var memo = {text: line.text, width: cm.display.scroller.clientWidth,
1038 markedSpans: line.markedSpans, measure: measure,
1039 classes: line.textClass + "|" + line.wrapClass};
1040 if (cache.length == 16) cache[++cm.display.measureLineCachePos % 16] = memo;
1041 else cache.push(memo);
1042 return measure;
1043 }
1044
1045 function measureLineInner(cm, line) {
1046 if (!cm.options.lineWrapping && line.text.length >= cm.options.crudeMeasuringFrom)
1047 return crudelyMeasureLine(cm, line);
1048
1049 var display = cm.display, measure = emptyArray(line.text.length);
1050 var pre = buildLineContent(cm, line, measure, true).pre;
1051
1052 // IE does not cache element positions of inline elements between
1053 // calls to getBoundingClientRect. This makes the loop below,
1054 // which gathers the positions of all the characters on the line,
1055 // do an amount of layout work quadratic to the number of
1056 // characters. When line wrapping is off, we try to improve things
1057 // by first subdividing the line into a bunch of inline blocks, so
1058 // that IE can reuse most of the layout information from caches
1059 // for those blocks. This does interfere with line wrapping, so it
1060 // doesn't work when wrapping is on, but in that case the
1061 // situation is slightly better, since IE does cache line-wrapping
1062 // information and only recomputes per-line.
1063 if (old_ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) {
1064 var fragment = document.createDocumentFragment();
1065 var chunk = 10, n = pre.childNodes.length;
1066 for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) {
1067 var wrap = elt("div", null, null, "display: inline-block");
1068 for (var j = 0; j < chunk && n; ++j) {
1069 wrap.appendChild(pre.firstChild);
1070 --n;
1071 }
1072 fragment.appendChild(wrap);
1073 }
1074 pre.appendChild(fragment);
1075 }
1076
1077 removeChildrenAndAdd(display.measure, pre);
1078
1079 var outer = getRect(display.lineDiv);
1080 var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight;
1081 // Work around an IE7/8 bug where it will sometimes have randomly
1082 // replaced our pre with a clone at this point.
1083 if (ie_lt9 && display.measure.first != pre)
1084 removeChildrenAndAdd(display.measure, pre);
1085
1086 function measureRect(rect) {
1087 var top = rect.top - outer.top, bot = rect.bottom - outer.top;
1088 if (bot > maxBot) bot = maxBot;
1089 if (top < 0) top = 0;
1090 for (var i = vranges.length - 2; i >= 0; i -= 2) {
1091 var rtop = vranges[i], rbot = vranges[i+1];
1092 if (rtop > bot || rbot < top) continue;
1093 if (rtop <= top && rbot >= bot ||
1094 top <= rtop && bot >= rbot ||
1095 Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) {
1096 vranges[i] = Math.min(top, rtop);
1097 vranges[i+1] = Math.max(bot, rbot);
1098 break;
1099 }
1100 }
1101 if (i < 0) { i = vranges.length; vranges.push(top, bot); }
1102 return {left: rect.left - outer.left,
1103 right: rect.right - outer.left,
1104 top: i, bottom: null};
1105 }
1106 function finishRect(rect) {
1107 rect.bottom = vranges[rect.top+1];
1108 rect.top = vranges[rect.top];
1109 }
1110
1111 for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) {
1112 var node = cur, rect = null;
1113 // A widget might wrap, needs special care
1114 if (/\bCodeMirror-widget\b/.test(cur.className) && cur.getClientRects) {
1115 if (cur.firstChild.nodeType == 1) node = cur.firstChild;
1116 var rects = node.getClientRects();
1117 if (rects.length > 1) {
1118 rect = data[i] = measureRect(rects[0]);
1119 rect.rightSide = measureRect(rects[rects.length - 1]);
1120 }
1121 }
1122 if (!rect) rect = data[i] = measureRect(getRect(node));
1123 if (cur.measureRight) rect.right = getRect(cur.measureRight).left - outer.left;
1124 if (cur.leftSide) rect.leftSide = measureRect(getRect(cur.leftSide));
1125 }
1126 removeChildren(cm.display.measure);
1127 for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) {
1128 finishRect(cur);
1129 if (cur.leftSide) finishRect(cur.leftSide);
1130 if (cur.rightSide) finishRect(cur.rightSide);
1131 }
1132 return data;
1133 }
1134
1135 function crudelyMeasureLine(cm, line) {
1136 var copy = new Line(line.text.slice(0, 100), null);
1137 if (line.textClass) copy.textClass = line.textClass;
1138 var measure = measureLineInner(cm, copy);
1139 var left = measureChar(cm, copy, 0, measure, "left");
1140 var right = measureChar(cm, copy, 99, measure, "right");
1141 return {crude: true, top: left.top, left: left.left, bottom: left.bottom, width: (right.right - left.left) / 100};
1142 }
1143
1144 function measureLineWidth(cm, line) {
1145 var hasBadSpan = false;
1146 if (line.markedSpans) for (var i = 0; i < line.markedSpans; ++i) {
1147 var sp = line.markedSpans[i];
1148 if (sp.collapsed && (sp.to == null || sp.to == line.text.length)) hasBadSpan = true;
1149 }
1150 var cached = !hasBadSpan && findCachedMeasurement(cm, line);
1151 if (cached || line.text.length >= cm.options.crudeMeasuringFrom)
1152 return measureChar(cm, line, line.text.length, cached && cached.measure, "right").right;
1153
1154 var pre = buildLineContent(cm, line, null, true).pre;
1155 var end = pre.appendChild(zeroWidthElement(cm.display.measure));
1156 removeChildrenAndAdd(cm.display.measure, pre);
1157 return getRect(end).right - getRect(cm.display.lineDiv).left;
1158 }
1159
1160 function clearCaches(cm) {
1161 cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0;
1162 cm.display.cachedCharWidth = cm.display.cachedTextHeight = null;
1163 if (!cm.options.lineWrapping) cm.display.maxLineChanged = true;
1164 cm.display.lineNumChars = null;
1165 }
1166
1167 function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; }
1168 function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; }
1169
1170 // Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page"
1171 function intoCoordSystem(cm, lineObj, rect, context) {
1172 if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
1173 var size = widgetHeight(lineObj.widgets[i]);
1174 rect.top += size; rect.bottom += size;
1175 }
1176 if (context == "line") return rect;
1177 if (!context) context = "local";
1178 var yOff = heightAtLine(cm, lineObj);
1179 if (context == "local") yOff += paddingTop(cm.display);
1180 else yOff -= cm.display.viewOffset;
1181 if (context == "page" || context == "window") {
1182 var lOff = getRect(cm.display.lineSpace);
1183 yOff += lOff.top + (context == "window" ? 0 : pageScrollY());
1184 var xOff = lOff.left + (context == "window" ? 0 : pageScrollX());
1185 rect.left += xOff; rect.right += xOff;
1186 }
1187 rect.top += yOff; rect.bottom += yOff;
1188 return rect;
1189 }
1190
1191 // Context may be "window", "page", "div", or "local"/null
1192 // Result is in "div" coords
1193 function fromCoordSystem(cm, coords, context) {
1194 if (context == "div") return coords;
1195 var left = coords.left, top = coords.top;
1196 // First move into "page" coordinate system
1197 if (context == "page") {
1198 left -= pageScrollX();
1199 top -= pageScrollY();
1200 } else if (context == "local" || !context) {
1201 var localBox = getRect(cm.display.sizer);
1202 left += localBox.left;
1203 top += localBox.top;
1204 }
1205
1206 var lineSpaceBox = getRect(cm.display.lineSpace);
1207 return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top};
1208 }
1209
1210 function charCoords(cm, pos, context, lineObj, bias) {
1211 if (!lineObj) lineObj = getLine(cm.doc, pos.line);
1212 return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, null, bias), context);
1213 }
1214
1215 function cursorCoords(cm, pos, context, lineObj, measurement) {
1216 lineObj = lineObj || getLine(cm.doc, pos.line);
1217 if (!measurement) measurement = measureLine(cm, lineObj);
1218 function get(ch, right) {
1219 var m = measureChar(cm, lineObj, ch, measurement, right ? "right" : "left");
1220 if (right) m.left = m.right; else m.right = m.left;
1221 return intoCoordSystem(cm, lineObj, m, context);
1222 }
1223 function getBidi(ch, partPos) {
1224 var part = order[partPos], right = part.level % 2;
1225 if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) {
1226 part = order[--partPos];
1227 ch = bidiRight(part) - (part.level % 2 ? 0 : 1);
1228 right = true;
1229 } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) {
1230 part = order[++partPos];
1231 ch = bidiLeft(part) - part.level % 2;
1232 right = false;
1233 }
1234 if (right && ch == part.to && ch > part.from) return get(ch - 1);
1235 return get(ch, right);
1236 }
1237 var order = getOrder(lineObj), ch = pos.ch;
1238 if (!order) return get(ch);
1239 var partPos = getBidiPartAt(order, ch);
1240 var val = getBidi(ch, partPos);
1241 if (bidiOther != null) val.other = getBidi(ch, bidiOther);
1242 return val;
1243 }
1244
1245 function PosWithInfo(line, ch, outside, xRel) {
1246 var pos = new Pos(line, ch);
1247 pos.xRel = xRel;
1248 if (outside) pos.outside = true;
1249 return pos;
1250 }
1251
1252 // Coords must be lineSpace-local
1253 function coordsChar(cm, x, y) {
1254 var doc = cm.doc;
1255 y += cm.display.viewOffset;
1256 if (y < 0) return PosWithInfo(doc.first, 0, true, -1);
1257 var lineNo = lineAtHeight(doc, y), last = doc.first + doc.size - 1;
1258 if (lineNo > last)
1259 return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1);
1260 if (x < 0) x = 0;
1261
1262 for (;;) {
1263 var lineObj = getLine(doc, lineNo);
1264 var found = coordsCharInner(cm, lineObj, lineNo, x, y);
1265 var merged = collapsedSpanAtEnd(lineObj);
1266 var mergedPos = merged && merged.find();
1267 if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0))
1268 lineNo = mergedPos.to.line;
1269 else
1270 return found;
1271 }
1272 }
1273
1274 function coordsCharInner(cm, lineObj, lineNo, x, y) {
1275 var innerOff = y - heightAtLine(cm, lineObj);
1276 var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth;
1277 var measurement = measureLine(cm, lineObj);
1278
1279 function getX(ch) {
1280 var sp = cursorCoords(cm, Pos(lineNo, ch), "line",
1281 lineObj, measurement);
1282 wrongLine = true;
1283 if (innerOff > sp.bottom) return sp.left - adjust;
1284 else if (innerOff < sp.top) return sp.left + adjust;
1285 else wrongLine = false;
1286 return sp.left;
1287 }
1288
1289 var bidi = getOrder(lineObj), dist = lineObj.text.length;
1290 var from = lineLeft(lineObj), to = lineRight(lineObj);
1291 var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine;
1292
1293 if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1);
1294 // Do a binary search between these bounds.
1295 for (;;) {
1296 if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
1297 var ch = x < fromX || x - fromX <= toX - x ? from : to;
1298 var xDiff = x - (ch == from ? fromX : toX);
1299 while (isExtendingChar(lineObj.text.charAt(ch))) ++ch;
1300 var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside,
1301 xDiff < 0 ? -1 : xDiff ? 1 : 0);
1302 return pos;
1303 }
1304 var step = Math.ceil(dist / 2), middle = from + step;
1305 if (bidi) {
1306 middle = from;
1307 for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
1308 }
1309 var middleX = getX(middle);
1310 if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;}
1311 else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;}
1312 }
1313 }
1314
1315 var measureText;
1316 function textHeight(display) {
1317 if (display.cachedTextHeight != null) return display.cachedTextHeight;
1318 if (measureText == null) {
1319 measureText = elt("pre");
1320 // Measure a bunch of lines, for browsers that compute
1321 // fractional heights.
1322 for (var i = 0; i < 49; ++i) {
1323 measureText.appendChild(document.createTextNode("x"));
1324 measureText.appendChild(elt("br"));
1325 }
1326 measureText.appendChild(document.createTextNode("x"));
1327 }
1328 removeChildrenAndAdd(display.measure, measureText);
1329 var height = measureText.offsetHeight / 50;
1330 if (height > 3) display.cachedTextHeight = height;
1331 removeChildren(display.measure);
1332 return height || 1;
1333 }
1334
1335 function charWidth(display) {
1336 if (display.cachedCharWidth != null) return display.cachedCharWidth;
1337 var anchor = elt("span", "x");
1338 var pre = elt("pre", [anchor]);
1339 removeChildrenAndAdd(display.measure, pre);
1340 var width = anchor.offsetWidth;
1341 if (width > 2) display.cachedCharWidth = width;
1342 return width || 10;
1343 }
1344
1345 // OPERATIONS
1346
1347 // Operations are used to wrap changes in such a way that each
1348 // change won't have to update the cursor and display (which would
1349 // be awkward, slow, and error-prone), but instead updates are
1350 // batched and then all combined and executed at once.
1351
1352 var nextOpId = 0;
1353 function startOperation(cm) {
1354 cm.curOp = {
1355 // An array of ranges of lines that have to be updated. See
1356 // updateDisplay.
1357 changes: [],
1358 forceUpdate: false,
1359 updateInput: null,
1360 userSelChange: null,
1361 textChanged: null,
1362 selectionChanged: false,
1363 cursorActivity: false,
1364 updateMaxLine: false,
1365 updateScrollPos: false,
1366 id: ++nextOpId
1367 };
1368 if (!delayedCallbackDepth++) delayedCallbacks = [];
1369 }
1370
1371 function endOperation(cm) {
1372 var op = cm.curOp, doc = cm.doc, display = cm.display;
1373 cm.curOp = null;
1374
1375 if (op.updateMaxLine) computeMaxLength(cm);
1376 if (display.maxLineChanged && !cm.options.lineWrapping && display.maxLine) {
1377 var width = measureLineWidth(cm, display.maxLine);
1378 display.sizer.style.minWidth = Math.max(0, width + 3 + scrollerCutOff) + "px";
1379 display.maxLineChanged = false;
1380 var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + display.sizer.offsetWidth - display.scroller.clientWidth);
1381 if (maxScrollLeft < doc.scrollLeft && !op.updateScrollPos)
1382 setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true);
1383 }
1384 var newScrollPos, updated;
1385 if (op.updateScrollPos) {
1386 newScrollPos = op.updateScrollPos;
1387 } else if (op.selectionChanged && display.scroller.clientHeight) { // don't rescroll if not visible
1388 var coords = cursorCoords(cm, doc.sel.head);
1389 newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
1390 }
1391 if (op.changes.length || op.forceUpdate || newScrollPos && newScrollPos.scrollTop != null) {
1392 updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop, op.forceUpdate);
1393 if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop;
1394 }
1395 if (!updated && op.selectionChanged) updateSelection(cm);
1396 if (op.updateScrollPos) {
1397 var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, newScrollPos.scrollTop));
1398 var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, newScrollPos.scrollLeft));
1399 display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = top;
1400 display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = left;
1401 alignHorizontally(cm);
1402 if (op.scrollToPos)
1403 scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from),
1404 clipPos(cm.doc, op.scrollToPos.to), op.scrollToPos.margin);
1405 } else if (newScrollPos) {
1406 scrollCursorIntoView(cm);
1407 }
1408 if (op.selectionChanged) restartBlink(cm);
1409
1410 if (cm.state.focused && op.updateInput)
1411 resetInput(cm, op.userSelChange);
1412
1413 var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers;
1414 if (hidden) for (var i = 0; i < hidden.length; ++i)
1415 if (!hidden[i].lines.length) signal(hidden[i], "hide");
1416 if (unhidden) for (var i = 0; i < unhidden.length; ++i)
1417 if (unhidden[i].lines.length) signal(unhidden[i], "unhide");
1418
1419 var delayed;
1420 if (!--delayedCallbackDepth) {
1421 delayed = delayedCallbacks;
1422 delayedCallbacks = null;
1423 }
1424 if (op.textChanged)
1425 signal(cm, "change", cm, op.textChanged);
1426 if (op.cursorActivity) signal(cm, "cursorActivity", cm);
1427 if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i]();
1428 }
1429
1430 // Wraps a function in an operation. Returns the wrapped function.
1431 function operation(cm1, f) {
1432 return function() {
1433 var cm = cm1 || this, withOp = !cm.curOp;
1434 if (withOp) startOperation(cm);
1435 try { var result = f.apply(cm, arguments); }
1436 finally { if (withOp) endOperation(cm); }
1437 return result;
1438 };
1439 }
1440 function docOperation(f) {
1441 return function() {
1442 var withOp = this.cm && !this.cm.curOp, result;
1443 if (withOp) startOperation(this.cm);
1444 try { result = f.apply(this, arguments); }
1445 finally { if (withOp) endOperation(this.cm); }
1446 return result;
1447 };
1448 }
1449 function runInOp(cm, f) {
1450 var withOp = !cm.curOp, result;
1451 if (withOp) startOperation(cm);
1452 try { result = f(); }
1453 finally { if (withOp) endOperation(cm); }
1454 return result;
1455 }
1456
1457 function regChange(cm, from, to, lendiff) {
1458 if (from == null) from = cm.doc.first;
1459 if (to == null) to = cm.doc.first + cm.doc.size;
1460 cm.curOp.changes.push({from: from, to: to, diff: lendiff});
1461 }
1462
1463 // INPUT HANDLING
1464
1465 function slowPoll(cm) {
1466 if (cm.display.pollingFast) return;
1467 cm.display.poll.set(cm.options.pollInterval, function() {
1468 readInput(cm);
1469 if (cm.state.focused) slowPoll(cm);
1470 });
1471 }
1472
1473 function fastPoll(cm) {
1474 var missed = false;
1475 cm.display.pollingFast = true;
1476 function p() {
1477 var changed = readInput(cm);
1478 if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
1479 else {cm.display.pollingFast = false; slowPoll(cm);}
1480 }
1481 cm.display.poll.set(20, p);
1482 }
1483
1484 // prevInput is a hack to work with IME. If we reset the textarea
1485 // on every change, that breaks IME. So we look for changes
1486 // compared to the previous content instead. (Modern browsers have
1487 // events that indicate IME taking place, but these are not widely
1488 // supported or compatible enough yet to rely on.)
1489 function readInput(cm) {
1490 var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc, sel = doc.sel;
1491 if (!cm.state.focused || hasSelection(input) || isReadOnly(cm) || cm.options.disableInput) return false;
1492 if (cm.state.pasteIncoming && cm.state.fakedLastChar) {
1493 input.value = input.value.substring(0, input.value.length - 1);
1494 cm.state.fakedLastChar = false;
1495 }
1496 var text = input.value;
1497 if (text == prevInput && posEq(sel.from, sel.to)) return false;
1498 if (ie && !ie_lt9 && cm.display.inputHasSelection === text) {
1499 resetInput(cm, true);
1500 return false;
1501 }
1502
1503 var withOp = !cm.curOp;
1504 if (withOp) startOperation(cm);
1505 sel.shift = false;
1506 var same = 0, l = Math.min(prevInput.length, text.length);
1507 while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same;
1508 var from = sel.from, to = sel.to;
1509 var inserted = text.slice(same);
1510 if (same < prevInput.length)
1511 from = Pos(from.line, from.ch - (prevInput.length - same));
1512 else if (cm.state.overwrite && posEq(from, to) && !cm.state.pasteIncoming)
1513 to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + inserted.length));
1514
1515 var updateInput = cm.curOp.updateInput;
1516 var changeEvent = {from: from, to: to, text: splitLines(inserted),
1517 origin: cm.state.pasteIncoming ? "paste" : cm.state.cutIncoming ? "cut" : "+input"};
1518 makeChange(cm.doc, changeEvent, "end");
1519 cm.curOp.updateInput = updateInput;
1520 signalLater(cm, "inputRead", cm, changeEvent);
1521 if (inserted && !cm.state.pasteIncoming && cm.options.electricChars &&
1522 cm.options.smartIndent && sel.head.ch < 100) {
1523 var electric = cm.getModeAt(sel.head).electricChars;
1524 if (electric) for (var i = 0; i < electric.length; i++)
1525 if (inserted.indexOf(electric.charAt(i)) > -1) {
1526 indentLine(cm, sel.head.line, "smart");
1527 break;
1528 }
1529 }
1530
1531 if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = "";
1532 else cm.display.prevInput = text;
1533 if (withOp) endOperation(cm);
1534 cm.state.pasteIncoming = cm.state.cutIncoming = false;
1535 return true;
1536 }
1537
1538 function resetInput(cm, user) {
1539 var minimal, selected, doc = cm.doc;
1540 if (!posEq(doc.sel.from, doc.sel.to)) {
1541 cm.display.prevInput = "";
1542 minimal = hasCopyEvent &&
1543 (doc.sel.to.line - doc.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000);
1544 var content = minimal ? "-" : selected || cm.getSelection();
1545 cm.display.input.value = content;
1546 if (cm.state.focused) selectInput(cm.display.input);
1547 if (ie && !ie_lt9) cm.display.inputHasSelection = content;
1548 } else if (user) {
1549 cm.display.prevInput = cm.display.input.value = "";
1550 if (ie && !ie_lt9) cm.display.inputHasSelection = null;
1551 }
1552 cm.display.inaccurateSelection = minimal;
1553 }
1554
1555 function focusInput(cm) {
1556 if (cm.options.readOnly != "nocursor" && (!mobile || document.activeElement != cm.display.input))
1557 cm.display.input.focus();
1558 }
1559
1560 function isReadOnly(cm) {
1561 return cm.options.readOnly || cm.doc.cantEdit;
1562 }
1563
1564 // EVENT HANDLERS
1565
1566 function registerEventHandlers(cm) {
1567 var d = cm.display;
1568 on(d.scroller, "mousedown", operation(cm, onMouseDown));
1569 if (old_ie)
1570 on(d.scroller, "dblclick", operation(cm, function(e) {
1571 if (signalDOMEvent(cm, e)) return;
1572 var pos = posFromMouse(cm, e);
1573 if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return;
1574 e_preventDefault(e);
1575 var word = findWordAt(getLine(cm.doc, pos.line).text, pos);
1576 extendSelection(cm.doc, word.from, word.to);
1577 }));
1578 else
1579 on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); });
1580 on(d.lineSpace, "selectstart", function(e) {
1581 if (!eventInWidget(d, e)) e_preventDefault(e);
1582 });
1583 // Gecko browsers fire contextmenu *after* opening the menu, at
1584 // which point we can't mess with it anymore. Context menu is
1585 // handled in onMouseDown for Gecko.
1586 if (!captureMiddleClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
1587
1588 on(d.scroller, "scroll", function() {
1589 if (d.scroller.clientHeight) {
1590 setScrollTop(cm, d.scroller.scrollTop);
1591 setScrollLeft(cm, d.scroller.scrollLeft, true);
1592 signal(cm, "scroll", cm);
1593 }
1594 });
1595 on(d.scrollbarV, "scroll", function() {
1596 if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop);
1597 });
1598 on(d.scrollbarH, "scroll", function() {
1599 if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft);
1600 });
1601
1602 on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
1603 on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
1604
1605 function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); }
1606 on(d.scrollbarH, "mousedown", reFocus);
1607 on(d.scrollbarV, "mousedown", reFocus);
1608 // Prevent wrapper from ever scrolling
1609 on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
1610
1611 var resizeTimer;
1612 function onResize() {
1613 if (resizeTimer == null) resizeTimer = setTimeout(function() {
1614 resizeTimer = null;
1615 // Might be a text scaling operation, clear size caches.
1616 d.cachedCharWidth = d.cachedTextHeight = knownScrollbarWidth = null;
1617 clearCaches(cm);
1618 runInOp(cm, bind(regChange, cm));
1619 }, 100);
1620 }
1621 on(window, "resize", onResize);
1622 // Above handler holds on to the editor and its data structures.
1623 // Here we poll to unregister it when the editor is no longer in
1624 // the document, so that it can be garbage-collected.
1625 function unregister() {
1626 for (var p = d.wrapper.parentNode; p && p != document.body; p = p.parentNode) {}
1627 if (p) setTimeout(unregister, 5000);
1628 else off(window, "resize", onResize);
1629 }
1630 setTimeout(unregister, 5000);
1631
1632 on(d.input, "keyup", operation(cm, onKeyUp));
1633 on(d.input, "input", function() {
1634 if (ie && !ie_lt9 && cm.display.inputHasSelection) cm.display.inputHasSelection = null;
1635 fastPoll(cm);
1636 });
1637 on(d.input, "keydown", operation(cm, onKeyDown));
1638 on(d.input, "keypress", operation(cm, onKeyPress));
1639 on(d.input, "focus", bind(onFocus, cm));
1640 on(d.input, "blur", bind(onBlur, cm));
1641
1642 function drag_(e) {
1643 if (signalDOMEvent(cm, e) || cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return;
1644 e_stop(e);
1645 }
1646 if (cm.options.dragDrop) {
1647 on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
1648 on(d.scroller, "dragenter", drag_);
1649 on(d.scroller, "dragover", drag_);
1650 on(d.scroller, "drop", operation(cm, onDrop));
1651 }
1652 on(d.scroller, "paste", function(e) {
1653 if (eventInWidget(d, e)) return;
1654 focusInput(cm);
1655 fastPoll(cm);
1656 });
1657 on(d.input, "paste", function() {
1658 // Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206
1659 // Add a char to the end of textarea before paste occur so that
1660 // selection doesn't span to the end of textarea.
1661 if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleDown < 200)) {
1662 var start = d.input.selectionStart, end = d.input.selectionEnd;
1663 d.input.value += "$";
1664 d.input.selectionStart = start;
1665 d.input.selectionEnd = end;
1666 cm.state.fakedLastChar = true;
1667 }
1668 cm.state.pasteIncoming = true;
1669 fastPoll(cm);
1670 });
1671
1672 function prepareCopy(e) {
1673 if (d.inaccurateSelection) {
1674 d.prevInput = "";
1675 d.inaccurateSelection = false;
1676 d.input.value = cm.getSelection();
1677 selectInput(d.input);
1678 }
1679 if (e.type == "cut") cm.state.cutIncoming = true;
1680 }
1681 on(d.input, "cut", prepareCopy);
1682 on(d.input, "copy", prepareCopy);
1683
1684 // Needed to handle Tab key in KHTML
1685 if (khtml) on(d.sizer, "mouseup", function() {
1686 if (document.activeElement == d.input) d.input.blur();
1687 focusInput(cm);
1688 });
1689 }
1690
1691 function eventInWidget(display, e) {
1692 for (var n = e_target(e); n != display.wrapper; n = n.parentNode) {
1693 if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true;
1694 }
1695 }
1696
1697 function posFromMouse(cm, e, liberal) {
1698 var display = cm.display;
1699 if (!liberal) {
1700 var target = e_target(e);
1701 if (target == display.scrollbarH || target == display.scrollbarH.firstChild ||
1702 target == display.scrollbarV || target == display.scrollbarV.firstChild ||
1703 target == display.scrollbarFiller || target == display.gutterFiller) return null;
1704 }
1705 var x, y, space = getRect(display.lineSpace);
1706 // Fails unpredictably on IE[67] when mouse is dragged around quickly.
1707 try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
1708 return coordsChar(cm, x - space.left, y - space.top);
1709 }
1710
1711 var lastClick, lastDoubleClick;
1712 function onMouseDown(e) {
1713 if (signalDOMEvent(this, e)) return;
1714 var cm = this, display = cm.display, doc = cm.doc, sel = doc.sel;
1715 sel.shift = e.shiftKey;
1716
1717 if (eventInWidget(display, e)) {
1718 if (!webkit) {
1719 display.scroller.draggable = false;
1720 setTimeout(function(){display.scroller.draggable = true;}, 100);
1721 }
1722 return;
1723 }
1724 if (clickInGutter(cm, e)) return;
1725 var start = posFromMouse(cm, e);
1726 window.focus();
1727
1728 switch (e_button(e)) {
1729 case 3:
1730 if (captureMiddleClick) onContextMenu.call(cm, cm, e);
1731 return;
1732 case 2:
1733 if (webkit) cm.state.lastMiddleDown = +new Date;
1734 if (start) extendSelection(cm.doc, start);
1735 setTimeout(bind(focusInput, cm), 20);
1736 e_preventDefault(e);
1737 return;
1738 }
1739 // For button 1, if it was clicked inside the editor
1740 // (posFromMouse returning non-null), we have to adjust the
1741 // selection.
1742 if (!start) {if (e_target(e) == display.scroller) e_preventDefault(e); return;}
1743
1744 if (!cm.state.focused) onFocus(cm);
1745
1746 var now = +new Date, type = "single";
1747 if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
1748 type = "triple";
1749 e_preventDefault(e);
1750 setTimeout(bind(focusInput, cm), 20);
1751 selectLine(cm, start.line);
1752 } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
1753 type = "double";
1754 lastDoubleClick = {time: now, pos: start};
1755 e_preventDefault(e);
1756 var word = findWordAt(getLine(doc, start.line).text, start);
1757 extendSelection(cm.doc, word.from, word.to);
1758 } else { lastClick = {time: now, pos: start}; }
1759
1760 var last = start;
1761 if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) &&
1762 !posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") {
1763 var dragEnd = operation(cm, function(e2) {
1764 if (webkit) display.scroller.draggable = false;
1765 cm.state.draggingText = false;
1766 off(document, "mouseup", dragEnd);
1767 off(display.scroller, "drop", dragEnd);
1768 if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
1769 e_preventDefault(e2);
1770 extendSelection(cm.doc, start);
1771 focusInput(cm);
1772 // Work around unexplainable focus problem in IE9 (#2127)
1773 if (old_ie && !ie_lt9)
1774 setTimeout(function() {document.body.focus(); focusInput(cm);}, 20);
1775 }
1776 });
1777 // Let the drag handler handle this.
1778 if (webkit) display.scroller.draggable = true;
1779 cm.state.draggingText = dragEnd;
1780 // IE's approach to draggable
1781 if (display.scroller.dragDrop) display.scroller.dragDrop();
1782 on(document, "mouseup", dragEnd);
1783 on(display.scroller, "drop", dragEnd);
1784 return;
1785 }
1786 e_preventDefault(e);
1787 if (type == "single") extendSelection(cm.doc, clipPos(doc, start));
1788
1789 var startstart = sel.from, startend = sel.to, lastPos = start;
1790
1791 function doSelect(cur) {
1792 if (posEq(lastPos, cur)) return;
1793 lastPos = cur;
1794
1795 if (type == "single") {
1796 extendSelection(cm.doc, clipPos(doc, start), cur);
1797 return;
1798 }
1799
1800 startstart = clipPos(doc, startstart);
1801 startend = clipPos(doc, startend);
1802 if (type == "double") {
1803 var word = findWordAt(getLine(doc, cur.line).text, cur);
1804 if (posLess(cur, startstart)) extendSelection(cm.doc, word.from, startend);
1805 else extendSelection(cm.doc, startstart, word.to);
1806 } else if (type == "triple") {
1807 if (posLess(cur, startstart)) extendSelection(cm.doc, startend, clipPos(doc, Pos(cur.line, 0)));
1808 else extendSelection(cm.doc, startstart, clipPos(doc, Pos(cur.line + 1, 0)));
1809 }
1810 }
1811
1812 var editorSize = getRect(display.wrapper);
1813 // Used to ensure timeout re-tries don't fire when another extend
1814 // happened in the meantime (clearTimeout isn't reliable -- at
1815 // least on Chrome, the timeouts still happen even when cleared,
1816 // if the clear happens after their scheduled firing time).
1817 var counter = 0;
1818
1819 function extend(e) {
1820 var curCount = ++counter;
1821 var cur = posFromMouse(cm, e, true);
1822 if (!cur) return;
1823 if (!posEq(cur, last)) {
1824 if (!cm.state.focused) onFocus(cm);
1825 last = cur;
1826 doSelect(cur);
1827 var visible = visibleLines(display, doc);
1828 if (cur.line >= visible.to || cur.line < visible.from)
1829 setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
1830 } else {
1831 var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
1832 if (outside) setTimeout(operation(cm, function() {
1833 if (counter != curCount) return;
1834 display.scroller.scrollTop += outside;
1835 extend(e);
1836 }), 50);
1837 }
1838 }
1839
1840 function done(e) {
1841 counter = Infinity;
1842 e_preventDefault(e);
1843 focusInput(cm);
1844 off(document, "mousemove", move);
1845 off(document, "mouseup", up);
1846 }
1847
1848 var move = operation(cm, function(e) {
1849 if (!ie_lt9 && (ie ? !e.buttons : !e_button(e))) done(e);
1850 else extend(e);
1851 });
1852 var up = operation(cm, done);
1853 on(document, "mousemove", move);
1854 on(document, "mouseup", up);
1855 }
1856
1857 function gutterEvent(cm, e, type, prevent, signalfn) {
1858 try { var mX = e.clientX, mY = e.clientY; }
1859 catch(e) { return false; }
1860 if (mX >= Math.floor(getRect(cm.display.gutters).right)) return false;
1861 if (prevent) e_preventDefault(e);
1862
1863 var display = cm.display;
1864 var lineBox = getRect(display.lineDiv);
1865
1866 if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e);
1867 mY -= lineBox.top - display.viewOffset;
1868
1869 for (var i = 0; i < cm.options.gutters.length; ++i) {
1870 var g = display.gutters.childNodes[i];
1871 if (g && getRect(g).right >= mX) {
1872 var line = lineAtHeight(cm.doc, mY);
1873 var gutter = cm.options.gutters[i];
1874 signalfn(cm, type, cm, line, gutter, e);
1875 return e_defaultPrevented(e);
1876 }
1877 }
1878 }
1879
1880 function contextMenuInGutter(cm, e) {
1881 if (!hasHandler(cm, "gutterContextMenu")) return false;
1882 return gutterEvent(cm, e, "gutterContextMenu", false, signal);
1883 }
1884
1885 function clickInGutter(cm, e) {
1886 return gutterEvent(cm, e, "gutterClick", true, signalLater);
1887 }
1888
1889 // Kludge to work around strange IE behavior where it'll sometimes
1890 // re-fire a series of drag-related events right after the drop (#1551)
1891 var lastDrop = 0;
1892
1893 function onDrop(e) {
1894 var cm = this;
1895 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e) || (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))))
1896 return;
1897 e_preventDefault(e);
1898 if (ie) lastDrop = +new Date;
1899 var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
1900 if (!pos || isReadOnly(cm)) return;
1901 if (files && files.length && window.FileReader && window.File) {
1902 var n = files.length, text = Array(n), read = 0;
1903 var loadFile = function(file, i) {
1904 var reader = new FileReader;
1905 reader.onload = function() {
1906 text[i] = reader.result;
1907 if (++read == n) {
1908 pos = clipPos(cm.doc, pos);
1909 makeChange(cm.doc, {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"}, "around");
1910 }
1911 };
1912 reader.readAsText(file);
1913 };
1914 for (var i = 0; i < n; ++i) loadFile(files[i], i);
1915 } else {
1916 // Don't do a replace if the drop happened inside of the selected text.
1917 if (cm.state.draggingText && !(posLess(pos, cm.doc.sel.from) || posLess(cm.doc.sel.to, pos))) {
1918 cm.state.draggingText(e);
1919 // Ensure the editor is re-focused
1920 setTimeout(bind(focusInput, cm), 20);
1921 return;
1922 }
1923 try {
1924 var text = e.dataTransfer.getData("Text");
1925 if (text) {
1926 var curFrom = cm.doc.sel.from, curTo = cm.doc.sel.to;
1927 setSelection(cm.doc, pos, pos);
1928 if (cm.state.draggingText) replaceRange(cm.doc, "", curFrom, curTo, "paste");
1929 cm.replaceSelection(text, null, "paste");
1930 focusInput(cm);
1931 }
1932 }
1933 catch(e){}
1934 }
1935 }
1936
1937 function onDragStart(cm, e) {
1938 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; }
1939 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return;
1940
1941 var txt = cm.getSelection();
1942 e.dataTransfer.setData("Text", txt);
1943
1944 // Use dummy image instead of default browsers image.
1945 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
1946 if (e.dataTransfer.setDragImage && !safari) {
1947 var img = elt("img", null, null, "position: fixed; left: 0; top: 0;");
1948 img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==";
1949 if (opera) {
1950 img.width = img.height = 1;
1951 cm.display.wrapper.appendChild(img);
1952 // Force a relayout, or Opera won't use our image for some obscure reason
1953 img._top = img.offsetTop;
1954 }
1955 e.dataTransfer.setDragImage(img, 0, 0);
1956 if (opera) img.parentNode.removeChild(img);
1957 }
1958 }
1959
1960 function setScrollTop(cm, val) {
1961 if (Math.abs(cm.doc.scrollTop - val) < 2) return;
1962 cm.doc.scrollTop = val;
1963 if (!gecko) updateDisplay(cm, [], val);
1964 if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
1965 if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
1966 if (gecko) updateDisplay(cm, []);
1967 startWorker(cm, 100);
1968 }
1969 function setScrollLeft(cm, val, isScroller) {
1970 if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return;
1971 val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth);
1972 cm.doc.scrollLeft = val;
1973 alignHorizontally(cm);
1974 if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
1975 if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val;
1976 }
1977
1978 // Since the delta values reported on mouse wheel events are
1979 // unstandardized between browsers and even browser versions, and
1980 // generally horribly unpredictable, this code starts by measuring
1981 // the scroll effect that the first few mouse wheel events have,
1982 // and, from that, detects the way it can convert deltas to pixel
1983 // offsets afterwards.
1984 //
1985 // The reason we want to know the amount a wheel event will scroll
1986 // is that it gives us a chance to update the display before the
1987 // actual scrolling happens, reducing flickering.
1988
1989 var wheelSamples = 0, wheelPixelsPerUnit = null;
1990 // Fill in a browser-detected starting value on browsers where we
1991 // know one. These don't have to be accurate -- the result of them
1992 // being wrong would just be a slight flicker on the first wheel
1993 // scroll (if it is large enough).
1994 if (ie) wheelPixelsPerUnit = -.53;
1995 else if (gecko) wheelPixelsPerUnit = 15;
1996 else if (chrome) wheelPixelsPerUnit = -.7;
1997 else if (safari) wheelPixelsPerUnit = -1/3;
1998
1999 function onScrollWheel(cm, e) {
2000 var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
2001 if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
2002 if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
2003 else if (dy == null) dy = e.wheelDelta;
2004
2005 var display = cm.display, scroll = display.scroller;
2006 // Quit if there's nothing to scroll here
2007 if (!(dx && scroll.scrollWidth > scroll.clientWidth ||
2008 dy && scroll.scrollHeight > scroll.clientHeight)) return;
2009
2010 // Webkit browsers on OS X abort momentum scrolls when the target
2011 // of the scroll event is removed from the scrollable element.
2012 // This hack (see related code in patchDisplay) makes sure the
2013 // element is kept around.
2014 if (dy && mac && webkit) {
2015 for (var cur = e.target; cur != scroll; cur = cur.parentNode) {
2016 if (cur.lineObj) {
2017 cm.display.currentWheelTarget = cur;
2018 break;
2019 }
2020 }
2021 }
2022
2023 // On some browsers, horizontal scrolling will cause redraws to
2024 // happen before the gutter has been realigned, causing it to
2025 // wriggle around in a most unseemly way. When we have an
2026 // estimated pixels/delta value, we just handle horizontal
2027 // scrolling entirely here. It'll be slightly off from native, but
2028 // better than glitching out.
2029 if (dx && !gecko && !opera && wheelPixelsPerUnit != null) {
2030 if (dy)
2031 setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
2032 setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
2033 e_preventDefault(e);
2034 display.wheelStartX = null; // Abort measurement, if in progress
2035 return;
2036 }
2037
2038 if (dy && wheelPixelsPerUnit != null) {
2039 var pixels = dy * wheelPixelsPerUnit;
2040 var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight;
2041 if (pixels < 0) top = Math.max(0, top + pixels - 50);
2042 else bot = Math.min(cm.doc.height, bot + pixels + 50);
2043 updateDisplay(cm, [], {top: top, bottom: bot});
2044 }
2045
2046 if (wheelSamples < 20) {
2047 if (display.wheelStartX == null) {
2048 display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop;
2049 display.wheelDX = dx; display.wheelDY = dy;
2050 setTimeout(function() {
2051 if (display.wheelStartX == null) return;
2052 var movedX = scroll.scrollLeft - display.wheelStartX;
2053 var movedY = scroll.scrollTop - display.wheelStartY;
2054 var sample = (movedY && display.wheelDY && movedY / display.wheelDY) ||
2055 (movedX && display.wheelDX && movedX / display.wheelDX);
2056 display.wheelStartX = display.wheelStartY = null;
2057 if (!sample) return;
2058 wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
2059 ++wheelSamples;
2060 }, 200);
2061 } else {
2062 display.wheelDX += dx; display.wheelDY += dy;
2063 }
2064 }
2065 }
2066
2067 function doHandleBinding(cm, bound, dropShift) {
2068 if (typeof bound == "string") {
2069 bound = commands[bound];
2070 if (!bound) return false;
2071 }
2072 // Ensure previous input has been read, so that the handler sees a
2073 // consistent view of the document
2074 if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
2075 var doc = cm.doc, prevShift = doc.sel.shift, done = false;
2076 try {
2077 if (isReadOnly(cm)) cm.state.suppressEdits = true;
2078 if (dropShift) doc.sel.shift = false;
2079 done = bound(cm) != Pass;
2080 } finally {
2081 doc.sel.shift = prevShift;
2082 cm.state.suppressEdits = false;
2083 }
2084 return done;
2085 }
2086
2087 function allKeyMaps(cm) {
2088 var maps = cm.state.keyMaps.slice(0);
2089 if (cm.options.extraKeys) maps.push(cm.options.extraKeys);
2090 maps.push(cm.options.keyMap);
2091 return maps;
2092 }
2093
2094 var maybeTransition;
2095 function handleKeyBinding(cm, e) {
2096 // Handle auto keymap transitions
2097 var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
2098 clearTimeout(maybeTransition);
2099 if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
2100 if (getKeyMap(cm.options.keyMap) == startMap) {
2101 cm.options.keyMap = (next.call ? next.call(null, cm) : next);
2102 keyMapChanged(cm);
2103 }
2104 }, 50);
2105
2106 var name = keyName(e, true), handled = false;
2107 if (!name) return false;
2108 var keymaps = allKeyMaps(cm);
2109
2110 if (e.shiftKey) {
2111 // First try to resolve full name (including 'Shift-'). Failing
2112 // that, see if there is a cursor-motion command (starting with
2113 // 'go') bound to the keyname without 'Shift-'.
2114 handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);})
2115 || lookupKey(name, keymaps, function(b) {
2116 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion)
2117 return doHandleBinding(cm, b);
2118 });
2119 } else {
2120 handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); });
2121 }
2122
2123 if (handled) {
2124 e_preventDefault(e);
2125 restartBlink(cm);
2126 if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; }
2127 signalLater(cm, "keyHandled", cm, name, e);
2128 }
2129 return handled;
2130 }
2131
2132 function handleCharBinding(cm, e, ch) {
2133 var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
2134 function(b) { return doHandleBinding(cm, b, true); });
2135 if (handled) {
2136 e_preventDefault(e);
2137 restartBlink(cm);
2138 signalLater(cm, "keyHandled", cm, "'" + ch + "'", e);
2139 }
2140 return handled;
2141 }
2142
2143 function onKeyUp(e) {
2144 var cm = this;
2145 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
2146 if (e.keyCode == 16) cm.doc.sel.shift = false;
2147 }
2148
2149 var lastStoppedKey = null;
2150 function onKeyDown(e) {
2151 var cm = this;
2152 if (!cm.state.focused) onFocus(cm);
2153 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
2154 if (old_ie && e.keyCode == 27) e.returnValue = false;
2155 var code = e.keyCode;
2156 // IE does strange things with escape.
2157 cm.doc.sel.shift = code == 16 || e.shiftKey;
2158 // First give onKeyEvent option a chance to handle this.
2159 var handled = handleKeyBinding(cm, e);
2160 if (opera) {
2161 lastStoppedKey = handled ? code : null;
2162 // Opera has no cut event... we try to at least catch the key combo
2163 if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey))
2164 cm.replaceSelection("");
2165 }
2166 }
2167
2168 function onKeyPress(e) {
2169 var cm = this;
2170 if (signalDOMEvent(cm, e) || cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
2171 var keyCode = e.keyCode, charCode = e.charCode;
2172 if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
2173 if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return;
2174 var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
2175 if (handleCharBinding(cm, e, ch)) return;
2176 if (ie && !ie_lt9) cm.display.inputHasSelection = null;
2177 fastPoll(cm);
2178 }
2179
2180 function onFocus(cm) {
2181 if (cm.options.readOnly == "nocursor") return;
2182 if (!cm.state.focused) {
2183 signal(cm, "focus", cm);
2184 cm.state.focused = true;
2185 if (cm.display.wrapper.className.search(/\bCodeMirror-focused\b/) == -1)
2186 cm.display.wrapper.className += " CodeMirror-focused";
2187 if (!cm.curOp) {
2188 resetInput(cm, true);
2189 if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730
2190 }
2191 }
2192 slowPoll(cm);
2193 restartBlink(cm);
2194 }
2195 function onBlur(cm) {
2196 if (cm.state.focused) {
2197 signal(cm, "blur", cm);
2198 cm.state.focused = false;
2199 cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-focused", "");
2200 }
2201 clearInterval(cm.display.blinker);
2202 setTimeout(function() {if (!cm.state.focused) cm.doc.sel.shift = false;}, 150);
2203 }
2204
2205 var detectingSelectAll;
2206 function onContextMenu(cm, e) {
2207 if (signalDOMEvent(cm, e, "contextmenu")) return;
2208 var display = cm.display, sel = cm.doc.sel;
2209 if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return;
2210
2211 var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
2212 if (!pos || opera) return; // Opera is difficult.
2213
2214 // Reset the current text selection only if the click is done outside of the selection
2215 // and 'resetSelectionOnContextMenu' option is true.
2216 var reset = cm.options.resetSelectionOnContextMenu;
2217 if (reset && (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to)))
2218 operation(cm, setSelection)(cm.doc, pos, pos);
2219
2220 var oldCSS = display.input.style.cssText;
2221 display.inputDiv.style.position = "absolute";
2222 display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
2223 "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: transparent; outline: none;" +
2224 "border-width: 0; outline: none; overflow: hidden; opacity: .05; -ms-opacity: .05; filter: alpha(opacity=5);";
2225 focusInput(cm);
2226 resetInput(cm, true);
2227 // Adds "Select all" to context menu in FF
2228 if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " ";
2229
2230 function prepareSelectAllHack() {
2231 if (display.input.selectionStart != null) {
2232 var extval = display.input.value = "\u200b" + (posEq(sel.from, sel.to) ? "" : display.input.value);
2233 display.prevInput = "\u200b";
2234 display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
2235 }
2236 }
2237 function rehide() {
2238 display.inputDiv.style.position = "relative";
2239 display.input.style.cssText = oldCSS;
2240 if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
2241 slowPoll(cm);
2242
2243 // Try to detect the user choosing select-all
2244 if (display.input.selectionStart != null) {
2245 if (!ie || ie_lt9) prepareSelectAllHack();
2246 clearTimeout(detectingSelectAll);
2247 var i = 0, poll = function(){
2248 if (display.prevInput == "\u200b" && display.input.selectionStart == 0)
2249 operation(cm, commands.selectAll)(cm);
2250 else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
2251 else resetInput(cm);
2252 };
2253 detectingSelectAll = setTimeout(poll, 200);
2254 }
2255 }
2256
2257 if (ie && !ie_lt9) prepareSelectAllHack();
2258 if (captureMiddleClick) {
2259 e_stop(e);
2260 var mouseup = function() {
2261 off(window, "mouseup", mouseup);
2262 setTimeout(rehide, 20);
2263 };
2264 on(window, "mouseup", mouseup);
2265 } else {
2266 setTimeout(rehide, 50);
2267 }
2268 }
2269
2270 // UPDATING
2271
2272 var changeEnd = CodeMirror.changeEnd = function(change) {
2273 if (!change.text) return change.to;
2274 return Pos(change.from.line + change.text.length - 1,
2275 lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0));
2276 };
2277
2278 // Make sure a position will be valid after the given change.
2279 function clipPostChange(doc, change, pos) {
2280 if (!posLess(change.from, pos)) return clipPos(doc, pos);
2281 var diff = (change.text.length - 1) - (change.to.line - change.from.line);
2282 if (pos.line > change.to.line + diff) {
2283 var preLine = pos.line - diff, lastLine = doc.first + doc.size - 1;
2284 if (preLine > lastLine) return Pos(lastLine, getLine(doc, lastLine).text.length);
2285 return clipToLen(pos, getLine(doc, preLine).text.length);
2286 }
2287 if (pos.line == change.to.line + diff)
2288 return clipToLen(pos, lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0) +
2289 getLine(doc, change.to.line).text.length - change.to.ch);
2290 var inside = pos.line - change.from.line;
2291 return clipToLen(pos, change.text[inside].length + (inside ? 0 : change.from.ch));
2292 }
2293
2294 // Hint can be null|"end"|"start"|"around"|{anchor,head}
2295 function computeSelAfterChange(doc, change, hint) {
2296 if (hint && typeof hint == "object") // Assumed to be {anchor, head} object
2297 return {anchor: clipPostChange(doc, change, hint.anchor),
2298 head: clipPostChange(doc, change, hint.head)};
2299
2300 if (hint == "start") return {anchor: change.from, head: change.from};
2301
2302 var end = changeEnd(change);
2303 if (hint == "around") return {anchor: change.from, head: end};
2304 if (hint == "end") return {anchor: end, head: end};
2305
2306 // hint is null, leave the selection alone as much as possible
2307 var adjustPos = function(pos) {
2308 if (posLess(pos, change.from)) return pos;
2309 if (!posLess(change.to, pos)) return end;
2310
2311 var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch;
2312 if (pos.line == change.to.line) ch += end.ch - change.to.ch;
2313 return Pos(line, ch);
2314 };
2315 return {anchor: adjustPos(doc.sel.anchor), head: adjustPos(doc.sel.head)};
2316 }
2317
2318 function filterChange(doc, change, update) {
2319 var obj = {
2320 canceled: false,
2321 from: change.from,
2322 to: change.to,
2323 text: change.text,
2324 origin: change.origin,
2325 cancel: function() { this.canceled = true; }
2326 };
2327 if (update) obj.update = function(from, to, text, origin) {
2328 if (from) this.from = clipPos(doc, from);
2329 if (to) this.to = clipPos(doc, to);
2330 if (text) this.text = text;
2331 if (origin !== undefined) this.origin = origin;
2332 };
2333 signal(doc, "beforeChange", doc, obj);
2334 if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj);
2335
2336 if (obj.canceled) return null;
2337 return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin};
2338 }
2339
2340 // Replace the range from from to to by the strings in replacement.
2341 // change is a {from, to, text [, origin]} object
2342 function makeChange(doc, change, selUpdate, ignoreReadOnly) {
2343 if (doc.cm) {
2344 if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, selUpdate, ignoreReadOnly);
2345 if (doc.cm.state.suppressEdits) return;
2346 }
2347
2348 if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) {
2349 change = filterChange(doc, change, true);
2350 if (!change) return;
2351 }
2352
2353 // Possibly split or suppress the update based on the presence
2354 // of read-only spans in its range.
2355 var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to);
2356 if (split) {
2357 for (var i = split.length - 1; i >= 1; --i)
2358 makeChangeNoReadonly(doc, {from: split[i].from, to: split[i].to, text: [""]});
2359 if (split.length)
2360 makeChangeNoReadonly(doc, {from: split[0].from, to: split[0].to, text: change.text}, selUpdate);
2361 } else {
2362 makeChangeNoReadonly(doc, change, selUpdate);
2363 }
2364 }
2365
2366 function makeChangeNoReadonly(doc, change, selUpdate) {
2367 if (change.text.length == 1 && change.text[0] == "" && posEq(change.from, change.to)) return;
2368 var selAfter = computeSelAfterChange(doc, change, selUpdate);
2369 addToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN);
2370
2371 makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change));
2372 var rebased = [];
2373
2374 linkedDocs(doc, function(doc, sharedHist) {
2375 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
2376 rebaseHist(doc.history, change);
2377 rebased.push(doc.history);
2378 }
2379 makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change));
2380 });
2381 }
2382
2383 function makeChangeFromHistory(doc, type) {
2384 if (doc.cm && doc.cm.state.suppressEdits) return;
2385
2386 var hist = doc.history;
2387 var event = (type == "undo" ? hist.done : hist.undone).pop();
2388 if (!event) return;
2389
2390 var anti = {changes: [], anchorBefore: event.anchorAfter, headBefore: event.headAfter,
2391 anchorAfter: event.anchorBefore, headAfter: event.headBefore,
2392 generation: hist.generation};
2393 (type == "undo" ? hist.undone : hist.done).push(anti);
2394 hist.generation = event.generation || ++hist.maxGeneration;
2395
2396 var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange");
2397
2398 for (var i = event.changes.length - 1; i >= 0; --i) {
2399 var change = event.changes[i];
2400 change.origin = type;
2401 if (filter && !filterChange(doc, change, false)) {
2402 (type == "undo" ? hist.done : hist.undone).length = 0;
2403 return;
2404 }
2405
2406 anti.changes.push(historyChangeFromChange(doc, change));
2407
2408 var after = i ? computeSelAfterChange(doc, change, null)
2409 : {anchor: event.anchorBefore, head: event.headBefore};
2410 makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change));
2411 var rebased = [];
2412
2413 linkedDocs(doc, function(doc, sharedHist) {
2414 if (!sharedHist && indexOf(rebased, doc.history) == -1) {
2415 rebaseHist(doc.history, change);
2416 rebased.push(doc.history);
2417 }
2418 makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change));
2419 });
2420 }
2421 }
2422
2423 function shiftDoc(doc, distance) {
2424 function shiftPos(pos) {return Pos(pos.line + distance, pos.ch);}
2425 doc.first += distance;
2426 if (doc.cm) regChange(doc.cm, doc.first, doc.first, distance);
2427 doc.sel.head = shiftPos(doc.sel.head); doc.sel.anchor = shiftPos(doc.sel.anchor);
2428 doc.sel.from = shiftPos(doc.sel.from); doc.sel.to = shiftPos(doc.sel.to);
2429 }
2430
2431 function makeChangeSingleDoc(doc, change, selAfter, spans) {
2432 if (doc.cm && !doc.cm.curOp)
2433 return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans);
2434
2435 if (change.to.line < doc.first) {
2436 shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line));
2437 return;
2438 }
2439 if (change.from.line > doc.lastLine()) return;
2440
2441 // Clip the change to the size of this doc
2442 if (change.from.line < doc.first) {
2443 var shift = change.text.length - 1 - (doc.first - change.from.line);
2444 shiftDoc(doc, shift);
2445 change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch),
2446 text: [lst(change.text)], origin: change.origin};
2447 }
2448 var last = doc.lastLine();
2449 if (change.to.line > last) {
2450 change = {from: change.from, to: Pos(last, getLine(doc, last).text.length),
2451 text: [change.text[0]], origin: change.origin};
2452 }
2453
2454 change.removed = getBetween(doc, change.from, change.to);
2455
2456 if (!selAfter) selAfter = computeSelAfterChange(doc, change, null);
2457 if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans, selAfter);
2458 else updateDoc(doc, change, spans, selAfter);
2459 }
2460
2461 function makeChangeSingleDocInEditor(cm, change, spans, selAfter) {
2462 var doc = cm.doc, display = cm.display, from = change.from, to = change.to;
2463
2464 var recomputeMaxLength = false, checkWidthStart = from.line;
2465 if (!cm.options.lineWrapping) {
2466 checkWidthStart = lineNo(visualLine(doc, getLine(doc, from.line)));
2467 doc.iter(checkWidthStart, to.line + 1, function(line) {
2468 if (line == display.maxLine) {
2469 recomputeMaxLength = true;
2470 return true;
2471 }
2472 });
2473 }
2474
2475 if (!posLess(doc.sel.head, change.from) && !posLess(change.to, doc.sel.head))
2476 cm.curOp.cursorActivity = true;
2477
2478 updateDoc(doc, change, spans, selAfter, estimateHeight(cm));
2479
2480 if (!cm.options.lineWrapping) {
2481 doc.iter(checkWidthStart, from.line + change.text.length, function(line) {
2482 var len = lineLength(doc, line);
2483 if (len > display.maxLineLength) {
2484 display.maxLine = line;
2485 display.maxLineLength = len;
2486 display.maxLineChanged = true;
2487 recomputeMaxLength = false;
2488 }
2489 });
2490 if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
2491 }
2492
2493 // Adjust frontier, schedule worker
2494 doc.frontier = Math.min(doc.frontier, from.line);
2495 startWorker(cm, 400);
2496
2497 var lendiff = change.text.length - (to.line - from.line) - 1;
2498 // Remember that these lines changed, for updating the display
2499 regChange(cm, from.line, to.line + 1, lendiff);
2500
2501 if (hasHandler(cm, "change")) {
2502 var changeObj = {from: from, to: to,
2503 text: change.text,
2504 removed: change.removed,
2505 origin: change.origin};
2506 if (cm.curOp.textChanged) {
2507 for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {}
2508 cur.next = changeObj;
2509 } else cm.curOp.textChanged = changeObj;
2510 }
2511 }
2512
2513 function replaceRange(doc, code, from, to, origin) {
2514 if (!to) to = from;
2515 if (posLess(to, from)) { var tmp = to; to = from; from = tmp; }
2516 if (typeof code == "string") code = splitLines(code);
2517 makeChange(doc, {from: from, to: to, text: code, origin: origin}, null);
2518 }
2519
2520 // POSITION OBJECT
2521
2522 function Pos(line, ch) {
2523 if (!(this instanceof Pos)) return new Pos(line, ch);
2524 this.line = line; this.ch = ch;
2525 }
2526 CodeMirror.Pos = Pos;
2527
2528 function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}
2529 function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}
2530 function cmp(a, b) {return a.line - b.line || a.ch - b.ch;}
2531 function copyPos(x) {return Pos(x.line, x.ch);}
2532
2533 // SELECTION
2534
2535 function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));}
2536 function clipPos(doc, pos) {
2537 if (pos.line < doc.first) return Pos(doc.first, 0);
2538 var last = doc.first + doc.size - 1;
2539 if (pos.line > last) return Pos(last, getLine(doc, last).text.length);
2540 return clipToLen(pos, getLine(doc, pos.line).text.length);
2541 }
2542 function clipToLen(pos, linelen) {
2543 var ch = pos.ch;
2544 if (ch == null || ch > linelen) return Pos(pos.line, linelen);
2545 else if (ch < 0) return Pos(pos.line, 0);
2546 else return pos;
2547 }
2548 function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;}
2549
2550 // If shift is held, this will move the selection anchor. Otherwise,
2551 // it'll set the whole selection.
2552 function extendSelection(doc, pos, other, bias) {
2553 if (doc.sel.shift || doc.sel.extend) {
2554 var anchor = doc.sel.anchor;
2555 if (other) {
2556 var posBefore = posLess(pos, anchor);
2557 if (posBefore != posLess(other, anchor)) {
2558 anchor = pos;
2559 pos = other;
2560 } else if (posBefore != posLess(pos, other)) {
2561 pos = other;
2562 }
2563 }
2564 setSelection(doc, anchor, pos, bias);
2565 } else {
2566 setSelection(doc, pos, other || pos, bias);
2567 }
2568 if (doc.cm) doc.cm.curOp.userSelChange = true;
2569 }
2570
2571 function filterSelectionChange(doc, anchor, head) {
2572 var obj = {anchor: anchor, head: head};
2573 signal(doc, "beforeSelectionChange", doc, obj);
2574 if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj);
2575 obj.anchor = clipPos(doc, obj.anchor); obj.head = clipPos(doc, obj.head);
2576 return obj;
2577 }
2578
2579 // Update the selection. Last two args are only used by
2580 // updateDoc, since they have to be expressed in the line
2581 // numbers before the update.
2582 function setSelection(doc, anchor, head, bias, checkAtomic) {
2583 if (!checkAtomic && hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) {
2584 var filtered = filterSelectionChange(doc, anchor, head);
2585 head = filtered.head;
2586 anchor = filtered.anchor;
2587 }
2588
2589 var sel = doc.sel;
2590 sel.goalColumn = null;
2591 if (bias == null) bias = posLess(head, sel.head) ? -1 : 1;
2592 // Skip over atomic spans.
2593 if (checkAtomic || !posEq(anchor, sel.anchor))
2594 anchor = skipAtomic(doc, anchor, bias, checkAtomic != "push");
2595 if (checkAtomic || !posEq(head, sel.head))
2596 head = skipAtomic(doc, head, bias, checkAtomic != "push");
2597
2598 if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return;
2599
2600 sel.anchor = anchor; sel.head = head;
2601 var inv = posLess(head, anchor);
2602 sel.from = inv ? head : anchor;
2603 sel.to = inv ? anchor : head;
2604
2605 if (doc.cm)
2606 doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged =
2607 doc.cm.curOp.cursorActivity = true;
2608
2609 signalLater(doc, "cursorActivity", doc);
2610 }
2611
2612 function reCheckSelection(cm) {
2613 setSelection(cm.doc, cm.doc.sel.from, cm.doc.sel.to, null, "push");
2614 }
2615
2616 function skipAtomic(doc, pos, bias, mayClear) {
2617 var flipped = false, curPos = pos;
2618 var dir = bias || 1;
2619 doc.cantEdit = false;
2620 search: for (;;) {
2621 var line = getLine(doc, curPos.line);
2622 if (line.markedSpans) {
2623 for (var i = 0; i < line.markedSpans.length; ++i) {
2624 var sp = line.markedSpans[i], m = sp.marker;
2625 if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
2626 (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
2627 if (mayClear) {
2628 signal(m, "beforeCursorEnter");
2629 if (m.explicitlyCleared) {
2630 if (!line.markedSpans) break;
2631 else {--i; continue;}
2632 }
2633 }
2634 if (!m.atomic) continue;
2635 var newPos = m.find()[dir < 0 ? "from" : "to"];
2636 if (posEq(newPos, curPos)) {
2637 newPos.ch += dir;
2638 if (newPos.ch < 0) {
2639 if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1));
2640 else newPos = null;
2641 } else if (newPos.ch > line.text.length) {
2642 if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0);
2643 else newPos = null;
2644 }
2645 if (!newPos) {
2646 if (flipped) {
2647 // Driven in a corner -- no valid cursor position found at all
2648 // -- try again *with* clearing, if we didn't already
2649 if (!mayClear) return skipAtomic(doc, pos, bias, true);
2650 // Otherwise, turn off editing until further notice, and return the start of the doc
2651 doc.cantEdit = true;
2652 return Pos(doc.first, 0);
2653 }
2654 flipped = true; newPos = pos; dir = -dir;
2655 }
2656 }
2657 curPos = newPos;
2658 continue search;
2659 }
2660 }
2661 }
2662 return curPos;
2663 }
2664 }
2665
2666 // SCROLLING
2667
2668 function scrollCursorIntoView(cm) {
2669 var coords = scrollPosIntoView(cm, cm.doc.sel.head, null, cm.options.cursorScrollMargin);
2670 if (!cm.state.focused) return;
2671 var display = cm.display, box = getRect(display.sizer), doScroll = null;
2672 if (coords.top + box.top < 0) doScroll = true;
2673 else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
2674 if (doScroll != null && !phantom) {
2675 var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " +
2676 (coords.top - display.viewOffset) + "px; height: " +
2677 (coords.bottom - coords.top + scrollerCutOff) + "px; left: " +
2678 coords.left + "px; width: 2px;");
2679 cm.display.lineSpace.appendChild(scrollNode);
2680 scrollNode.scrollIntoView(doScroll);
2681 cm.display.lineSpace.removeChild(scrollNode);
2682 }
2683 }
2684
2685 function scrollPosIntoView(cm, pos, end, margin) {
2686 if (margin == null) margin = 0;
2687 for (;;) {
2688 var changed = false, coords = cursorCoords(cm, pos);
2689 var endCoords = !end || end == pos ? coords : cursorCoords(cm, end);
2690 var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left),
2691 Math.min(coords.top, endCoords.top) - margin,
2692 Math.max(coords.left, endCoords.left),
2693 Math.max(coords.bottom, endCoords.bottom) + margin);
2694 var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft;
2695 if (scrollPos.scrollTop != null) {
2696 setScrollTop(cm, scrollPos.scrollTop);
2697 if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true;
2698 }
2699 if (scrollPos.scrollLeft != null) {
2700 setScrollLeft(cm, scrollPos.scrollLeft);
2701 if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true;
2702 }
2703 if (!changed) return coords;
2704 }
2705 }
2706
2707 function scrollIntoView(cm, x1, y1, x2, y2) {
2708 var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
2709 if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
2710 if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
2711 }
2712
2713 function calculateScrollPos(cm, x1, y1, x2, y2) {
2714 var display = cm.display, snapMargin = textHeight(cm.display);
2715 if (y1 < 0) y1 = 0;
2716 var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {};
2717 var docBottom = cm.doc.height + paddingVert(display);
2718 var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin;
2719 if (y1 < screentop) {
2720 result.scrollTop = atTop ? 0 : y1;
2721 } else if (y2 > screentop + screen) {
2722 var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen);
2723 if (newTop != screentop) result.scrollTop = newTop;
2724 }
2725
2726 var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft;
2727 x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
2728 var gutterw = display.gutters.offsetWidth;
2729 var atLeft = x1 < gutterw + 10;
2730 if (x1 < screenleft + gutterw || atLeft) {
2731 if (atLeft) x1 = 0;
2732 result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
2733 } else if (x2 > screenw + screenleft - 3) {
2734 result.scrollLeft = x2 + 10 - screenw;
2735 }
2736 return result;
2737 }
2738
2739 function updateScrollPos(cm, left, top) {
2740 cm.curOp.updateScrollPos = {scrollLeft: left == null ? cm.doc.scrollLeft : left,
2741 scrollTop: top == null ? cm.doc.scrollTop : top};
2742 }
2743
2744 function addToScrollPos(cm, left, top) {
2745 var pos = cm.curOp.updateScrollPos || (cm.curOp.updateScrollPos = {scrollLeft: cm.doc.scrollLeft, scrollTop: cm.doc.scrollTop});
2746 var scroll = cm.display.scroller;
2747 pos.scrollTop = Math.max(0, Math.min(scroll.scrollHeight - scroll.clientHeight, pos.scrollTop + top));
2748 pos.scrollLeft = Math.max(0, Math.min(scroll.scrollWidth - scroll.clientWidth, pos.scrollLeft + left));
2749 }
2750
2751 // API UTILITIES
2752
2753 function indentLine(cm, n, how, aggressive) {
2754 var doc = cm.doc, state;
2755 if (how == null) how = "add";
2756 if (how == "smart") {
2757 if (!cm.doc.mode.indent) how = "prev";
2758 else state = getStateBefore(cm, n);
2759 }
2760
2761 var tabSize = cm.options.tabSize;
2762 var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
2763 if (line.stateAfter) line.stateAfter = null;
2764 var curSpaceString = line.text.match(/^\s*/)[0], indentation;
2765 if (!aggressive && !/\S/.test(line.text)) {
2766 indentation = 0;
2767 how = "not";
2768 } else if (how == "smart") {
2769 indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
2770 if (indentation == Pass) {
2771 if (!aggressive) return;
2772 how = "prev";
2773 }
2774 }
2775 if (how == "prev") {
2776 if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
2777 else indentation = 0;
2778 } else if (how == "add") {
2779 indentation = curSpace + cm.options.indentUnit;
2780 } else if (how == "subtract") {
2781 indentation = curSpace - cm.options.indentUnit;
2782 } else if (typeof how == "number") {
2783 indentation = curSpace + how;
2784 }
2785 indentation = Math.max(0, indentation);
2786
2787 var indentString = "", pos = 0;
2788 if (cm.options.indentWithTabs)
2789 for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
2790 if (pos < indentation) indentString += spaceStr(indentation - pos);
2791
2792 if (indentString != curSpaceString)
2793 replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input");
2794 else if (doc.sel.head.line == n && doc.sel.head.ch < curSpaceString.length)
2795 setSelection(doc, Pos(n, curSpaceString.length), Pos(n, curSpaceString.length), 1);
2796 line.stateAfter = null;
2797 }
2798
2799 function changeLine(cm, handle, op) {
2800 var no = handle, line = handle, doc = cm.doc;
2801 if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
2802 else no = lineNo(handle);
2803 if (no == null) return null;
2804 if (op(line, no)) regChange(cm, no, no + 1);
2805 else return null;
2806 return line;
2807 }
2808
2809 function findPosH(doc, pos, dir, unit, visually) {
2810 var line = pos.line, ch = pos.ch, origDir = dir;
2811 var lineObj = getLine(doc, line);
2812 var possible = true;
2813 function findNextLine() {
2814 var l = line + dir;
2815 if (l < doc.first || l >= doc.first + doc.size) return (possible = false);
2816 line = l;
2817 return lineObj = getLine(doc, l);
2818 }
2819 function moveOnce(boundToLine) {
2820 var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
2821 if (next == null) {
2822 if (!boundToLine && findNextLine()) {
2823 if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
2824 else ch = dir < 0 ? lineObj.text.length : 0;
2825 } else return (possible = false);
2826 } else ch = next;
2827 return true;
2828 }
2829
2830 if (unit == "char") moveOnce();
2831 else if (unit == "column") moveOnce(true);
2832 else if (unit == "word" || unit == "group") {
2833 var sawType = null, group = unit == "group";
2834 for (var first = true;; first = false) {
2835 if (dir < 0 && !moveOnce(!first)) break;
2836 var cur = lineObj.text.charAt(ch) || "\n";
2837 var type = isWordChar(cur) ? "w"
2838 : !group ? null
2839 : /\s/.test(cur) ? null
2840 : "p";
2841 if (sawType && sawType != type) {
2842 if (dir < 0) {dir = 1; moveOnce();}
2843 break;
2844 }
2845 if (type) sawType = type;
2846 if (dir > 0 && !moveOnce(!first)) break;
2847 }
2848 }
2849 var result = skipAtomic(doc, Pos(line, ch), origDir, true);
2850 if (!possible) result.hitSide = true;
2851 return result;
2852 }
2853
2854 function findPosV(cm, pos, dir, unit) {
2855 var doc = cm.doc, x = pos.left, y;
2856 if (unit == "page") {
2857 var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
2858 y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display));
2859 } else if (unit == "line") {
2860 y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
2861 }
2862 for (;;) {
2863 var target = coordsChar(cm, x, y);
2864 if (!target.outside) break;
2865 if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; }
2866 y += dir * 5;
2867 }
2868 return target;
2869 }
2870
2871 function findWordAt(line, pos) {
2872 var start = pos.ch, end = pos.ch;
2873 if (line) {
2874 if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end;
2875 var startChar = line.charAt(start);
2876 var check = isWordChar(startChar) ? isWordChar
2877 : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);}
2878 : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
2879 while (start > 0 && check(line.charAt(start - 1))) --start;
2880 while (end < line.length && check(line.charAt(end))) ++end;
2881 }
2882 return {from: Pos(pos.line, start), to: Pos(pos.line, end)};
2883 }
2884
2885 function selectLine(cm, line) {
2886 extendSelection(cm.doc, Pos(line, 0), clipPos(cm.doc, Pos(line + 1, 0)));
2887 }
2888
2889 // PROTOTYPE
2890
2891 // The publicly visible API. Note that operation(null, f) means
2892 // 'wrap f in an operation, performed on its `this` parameter'
2893
2894 CodeMirror.prototype = {
2895 constructor: CodeMirror,
2896 focus: function(){window.focus(); focusInput(this); fastPoll(this);},
2897
2898 setOption: function(option, value) {
2899 var options = this.options, old = options[option];
2900 if (options[option] == value && option != "mode") return;
2901 options[option] = value;
2902 if (optionHandlers.hasOwnProperty(option))
2903 operation(this, optionHandlers[option])(this, value, old);
2904 },
2905
2906 getOption: function(option) {return this.options[option];},
2907 getDoc: function() {return this.doc;},
2908
2909 addKeyMap: function(map, bottom) {
2910 this.state.keyMaps[bottom ? "push" : "unshift"](map);
2911 },
2912 removeKeyMap: function(map) {
2913 var maps = this.state.keyMaps;
2914 for (var i = 0; i < maps.length; ++i)
2915 if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map)) {
2916 maps.splice(i, 1);
2917 return true;
2918 }
2919 },
2920
2921 addOverlay: operation(null, function(spec, options) {
2922 var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec);
2923 if (mode.startState) throw new Error("Overlays may not be stateful.");
2924 this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque});
2925 this.state.modeGen++;
2926 regChange(this);
2927 }),
2928 removeOverlay: operation(null, function(spec) {
2929 var overlays = this.state.overlays;
2930 for (var i = 0; i < overlays.length; ++i) {
2931 var cur = overlays[i].modeSpec;
2932 if (cur == spec || typeof spec == "string" && cur.name == spec) {
2933 overlays.splice(i, 1);
2934 this.state.modeGen++;
2935 regChange(this);
2936 return;
2937 }
2938 }
2939 }),
2940
2941 indentLine: operation(null, function(n, dir, aggressive) {
2942 if (typeof dir != "string" && typeof dir != "number") {
2943 if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
2944 else dir = dir ? "add" : "subtract";
2945 }
2946 if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive);
2947 }),
2948 indentSelection: operation(null, function(how) {
2949 var sel = this.doc.sel;
2950 if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how, true);
2951 var e = sel.to.line - (sel.to.ch ? 0 : 1);
2952 for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how);
2953 }),
2954
2955 // Fetch the parser token for a given character. Useful for hacks
2956 // that want to inspect the mode state (say, for completion).
2957 getTokenAt: function(pos, precise) {
2958 var doc = this.doc;
2959 pos = clipPos(doc, pos);
2960 var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode;
2961 var line = getLine(doc, pos.line);
2962 var stream = new StringStream(line.text, this.options.tabSize);
2963 while (stream.pos < pos.ch && !stream.eol()) {
2964 stream.start = stream.pos;
2965 var style = mode.token(stream, state);
2966 }
2967 return {start: stream.start,
2968 end: stream.pos,
2969 string: stream.current(),
2970 className: style || null, // Deprecated, use 'type' instead
2971 type: style || null,
2972 state: state};
2973 },
2974
2975 getTokenTypeAt: function(pos) {
2976 pos = clipPos(this.doc, pos);
2977 var styles = getLineStyles(this, getLine(this.doc, pos.line));
2978 var before = 0, after = (styles.length - 1) / 2, ch = pos.ch;
2979 if (ch == 0) return styles[2];
2980 for (;;) {
2981 var mid = (before + after) >> 1;
2982 if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid;
2983 else if (styles[mid * 2 + 1] < ch) before = mid + 1;
2984 else return styles[mid * 2 + 2];
2985 }
2986 },
2987
2988 getModeAt: function(pos) {
2989 var mode = this.doc.mode;
2990 if (!mode.innerMode) return mode;
2991 return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode;
2992 },
2993
2994 getHelper: function(pos, type) {
2995 return this.getHelpers(pos, type)[0];
2996 },
2997
2998 getHelpers: function(pos, type) {
2999 var found = [];
3000 if (!helpers.hasOwnProperty(type)) return helpers;
3001 var help = helpers[type], mode = this.getModeAt(pos);
3002 if (typeof mode[type] == "string") {
3003 if (help[mode[type]]) found.push(help[mode[type]]);
3004 } else if (mode[type]) {
3005 for (var i = 0; i < mode[type].length; i++) {
3006 var val = help[mode[type][i]];
3007 if (val) found.push(val);
3008 }
3009 } else if (mode.helperType && help[mode.helperType]) {
3010 found.push(help[mode.helperType]);
3011 } else if (help[mode.name]) {
3012 found.push(help[mode.name]);
3013 }
3014 for (var i = 0; i < help._global.length; i++) {
3015 var cur = help._global[i];
3016 if (cur.pred(mode, this) && indexOf(found, cur.val) == -1)
3017 found.push(cur.val);
3018 }
3019 return found;
3020 },
3021
3022 getStateAfter: function(line, precise) {
3023 var doc = this.doc;
3024 line = clipLine(doc, line == null ? doc.first + doc.size - 1: line);
3025 return getStateBefore(this, line + 1, precise);
3026 },
3027
3028 cursorCoords: function(start, mode) {
3029 var pos, sel = this.doc.sel;
3030 if (start == null) pos = sel.head;
3031 else if (typeof start == "object") pos = clipPos(this.doc, start);
3032 else pos = start ? sel.from : sel.to;
3033 return cursorCoords(this, pos, mode || "page");
3034 },
3035
3036 charCoords: function(pos, mode) {
3037 return charCoords(this, clipPos(this.doc, pos), mode || "page");
3038 },
3039
3040 coordsChar: function(coords, mode) {
3041 coords = fromCoordSystem(this, coords, mode || "page");
3042 return coordsChar(this, coords.left, coords.top);
3043 },
3044
3045 lineAtHeight: function(height, mode) {
3046 height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top;
3047 return lineAtHeight(this.doc, height + this.display.viewOffset);
3048 },
3049 heightAtLine: function(line, mode) {
3050 var end = false, last = this.doc.first + this.doc.size - 1;
3051 if (line < this.doc.first) line = this.doc.first;
3052 else if (line > last) { line = last; end = true; }
3053 var lineObj = getLine(this.doc, line);
3054 return intoCoordSystem(this, getLine(this.doc, line), {top: 0, left: 0}, mode || "page").top +
3055 (end ? lineObj.height : 0);
3056 },
3057
3058 defaultTextHeight: function() { return textHeight(this.display); },
3059 defaultCharWidth: function() { return charWidth(this.display); },
3060
3061 setGutterMarker: operation(null, function(line, gutterID, value) {
3062 return changeLine(this, line, function(line) {
3063 var markers = line.gutterMarkers || (line.gutterMarkers = {});
3064 markers[gutterID] = value;
3065 if (!value && isEmpty(markers)) line.gutterMarkers = null;
3066 return true;
3067 });
3068 }),
3069
3070 clearGutter: operation(null, function(gutterID) {
3071 var cm = this, doc = cm.doc, i = doc.first;
3072 doc.iter(function(line) {
3073 if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
3074 line.gutterMarkers[gutterID] = null;
3075 regChange(cm, i, i + 1);
3076 if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
3077 }
3078 ++i;
3079 });
3080 }),
3081
3082 addLineClass: operation(null, function(handle, where, cls) {
3083 return changeLine(this, handle, function(line) {
3084 var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
3085 if (!line[prop]) line[prop] = cls;
3086 else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false;
3087 else line[prop] += " " + cls;
3088 return true;
3089 });
3090 }),
3091
3092 removeLineClass: operation(null, function(handle, where, cls) {
3093 return changeLine(this, handle, function(line) {
3094 var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
3095 var cur = line[prop];
3096 if (!cur) return false;
3097 else if (cls == null) line[prop] = null;
3098 else {
3099 var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)"));
3100 if (!found) return false;
3101 var end = found.index + found[0].length;
3102 line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null;
3103 }
3104 return true;
3105 });
3106 }),
3107
3108 addLineWidget: operation(null, function(handle, node, options) {
3109 return addLineWidget(this, handle, node, options);
3110 }),
3111
3112 removeLineWidget: function(widget) { widget.clear(); },
3113
3114 lineInfo: function(line) {
3115 if (typeof line == "number") {
3116 if (!isLine(this.doc, line)) return null;
3117 var n = line;
3118 line = getLine(this.doc, line);
3119 if (!line) return null;
3120 } else {
3121 var n = lineNo(line);
3122 if (n == null) return null;
3123 }
3124 return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
3125 textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
3126 widgets: line.widgets};
3127 },
3128
3129 getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};},
3130
3131 addWidget: function(pos, node, scroll, vert, horiz) {
3132 var display = this.display;
3133 pos = cursorCoords(this, clipPos(this.doc, pos));
3134 var top = pos.bottom, left = pos.left;
3135 node.style.position = "absolute";
3136 display.sizer.appendChild(node);
3137 if (vert == "over") {
3138 top = pos.top;
3139 } else if (vert == "above" || vert == "near") {
3140 var vspace = Math.max(display.wrapper.clientHeight, this.doc.height),
3141 hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
3142 // Default to positioning above (if specified and possible); otherwise default to positioning below
3143 if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight)
3144 top = pos.top - node.offsetHeight;
3145 else if (pos.bottom + node.offsetHeight <= vspace)
3146 top = pos.bottom;
3147 if (left + node.offsetWidth > hspace)
3148 left = hspace - node.offsetWidth;
3149 }
3150 node.style.top = top + "px";
3151 node.style.left = node.style.right = "";
3152 if (horiz == "right") {
3153 left = display.sizer.clientWidth - node.offsetWidth;
3154 node.style.right = "0px";
3155 } else {
3156 if (horiz == "left") left = 0;
3157 else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
3158 node.style.left = left + "px";
3159 }
3160 if (scroll)
3161 scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
3162 },
3163
3164 triggerOnKeyDown: operation(null, onKeyDown),
3165 triggerOnKeyPress: operation(null, onKeyPress),
3166 triggerOnKeyUp: operation(null, onKeyUp),
3167
3168 execCommand: function(cmd) {
3169 if (commands.hasOwnProperty(cmd))
3170 return commands[cmd](this);
3171 },
3172
3173 findPosH: function(from, amount, unit, visually) {
3174 var dir = 1;
3175 if (amount < 0) { dir = -1; amount = -amount; }
3176 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
3177 cur = findPosH(this.doc, cur, dir, unit, visually);
3178 if (cur.hitSide) break;
3179 }
3180 return cur;
3181 },
3182
3183 moveH: operation(null, function(dir, unit) {
3184 var sel = this.doc.sel, pos;
3185 if (sel.shift || sel.extend || posEq(sel.from, sel.to))
3186 pos = findPosH(this.doc, sel.head, dir, unit, this.options.rtlMoveVisually);
3187 else
3188 pos = dir < 0 ? sel.from : sel.to;
3189 extendSelection(this.doc, pos, pos, dir);
3190 }),
3191
3192 deleteH: operation(null, function(dir, unit) {
3193 var sel = this.doc.sel;
3194 if (!posEq(sel.from, sel.to)) replaceRange(this.doc, "", sel.from, sel.to, "+delete");
3195 else replaceRange(this.doc, "", sel.from, findPosH(this.doc, sel.head, dir, unit, false), "+delete");
3196 this.curOp.userSelChange = true;
3197 }),
3198
3199 findPosV: function(from, amount, unit, goalColumn) {
3200 var dir = 1, x = goalColumn;
3201 if (amount < 0) { dir = -1; amount = -amount; }
3202 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) {
3203 var coords = cursorCoords(this, cur, "div");
3204 if (x == null) x = coords.left;
3205 else coords.left = x;
3206 cur = findPosV(this, coords, dir, unit);
3207 if (cur.hitSide) break;
3208 }
3209 return cur;
3210 },
3211
3212 moveV: operation(null, function(dir, unit) {
3213 var sel = this.doc.sel, target, goal;
3214 if (sel.shift || sel.extend || posEq(sel.from, sel.to)) {
3215 var pos = cursorCoords(this, sel.head, "div");
3216 if (sel.goalColumn != null) pos.left = sel.goalColumn;
3217 target = findPosV(this, pos, dir, unit);
3218 if (unit == "page") addToScrollPos(this, 0, charCoords(this, target, "div").top - pos.top);
3219 goal = pos.left;
3220 } else {
3221 target = dir < 0 ? sel.from : sel.to;
3222 }
3223 extendSelection(this.doc, target, target, dir);
3224 if (goal != null) sel.goalColumn = goal;
3225 }),
3226
3227 toggleOverwrite: function(value) {
3228 if (value != null && value == this.state.overwrite) return;
3229 if (this.state.overwrite = !this.state.overwrite)
3230 this.display.cursor.className += " CodeMirror-overwrite";
3231 else
3232 this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", "");
3233
3234 signal(this, "overwriteToggle", this, this.state.overwrite);
3235 },
3236 hasFocus: function() { return document.activeElement == this.display.input; },
3237
3238 scrollTo: operation(null, function(x, y) {
3239 updateScrollPos(this, x, y);
3240 }),
3241 getScrollInfo: function() {
3242 var scroller = this.display.scroller, co = scrollerCutOff;
3243 return {left: scroller.scrollLeft, top: scroller.scrollTop,
3244 height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
3245 clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
3246 },
3247
3248 scrollIntoView: operation(null, function(range, margin) {
3249 if (range == null) range = {from: this.doc.sel.head, to: null};
3250 else if (typeof range == "number") range = {from: Pos(range, 0), to: null};
3251 else if (range.from == null) range = {from: range, to: null};
3252 if (!range.to) range.to = range.from;
3253 if (!margin) margin = 0;
3254
3255 var coords = range;
3256 if (range.from.line != null) {
3257 this.curOp.scrollToPos = {from: range.from, to: range.to, margin: margin};
3258 coords = {from: cursorCoords(this, range.from),
3259 to: cursorCoords(this, range.to)};
3260 }
3261 var sPos = calculateScrollPos(this, Math.min(coords.from.left, coords.to.left),
3262 Math.min(coords.from.top, coords.to.top) - margin,
3263 Math.max(coords.from.right, coords.to.right),
3264 Math.max(coords.from.bottom, coords.to.bottom) + margin);
3265 updateScrollPos(this, sPos.scrollLeft, sPos.scrollTop);
3266 }),
3267
3268 setSize: operation(null, function(width, height) {
3269 function interpret(val) {
3270 return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
3271 }
3272 if (width != null) this.display.wrapper.style.width = interpret(width);
3273 if (height != null) this.display.wrapper.style.height = interpret(height);
3274 if (this.options.lineWrapping)
3275 this.display.measureLineCache.length = this.display.measureLineCachePos = 0;
3276 this.curOp.forceUpdate = true;
3277 signal(this, "refresh", this);
3278 }),
3279
3280 operation: function(f){return runInOp(this, f);},
3281
3282 refresh: operation(null, function() {
3283 var oldHeight = this.display.cachedTextHeight;
3284 clearCaches(this);
3285 updateScrollPos(this, this.doc.scrollLeft, this.doc.scrollTop);
3286 regChange(this);
3287 if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5)
3288 estimateLineHeights(this);
3289 signal(this, "refresh", this);
3290 }),
3291
3292 swapDoc: operation(null, function(doc) {
3293 var old = this.doc;
3294 old.cm = null;
3295 attachDoc(this, doc);
3296 clearCaches(this);
3297 resetInput(this, true);
3298 updateScrollPos(this, doc.scrollLeft, doc.scrollTop);
3299 signalLater(this, "swapDoc", this, old);
3300 return old;
3301 }),
3302
3303 getInputField: function(){return this.display.input;},
3304 getWrapperElement: function(){return this.display.wrapper;},
3305 getScrollerElement: function(){return this.display.scroller;},
3306 getGutterElement: function(){return this.display.gutters;}
3307 };
3308 eventMixin(CodeMirror);
3309
3310 // OPTION DEFAULTS
3311
3312 var optionHandlers = CodeMirror.optionHandlers = {};
3313
3314 // The default configuration options.
3315 var defaults = CodeMirror.defaults = {};
3316
3317 function option(name, deflt, handle, notOnInit) {
3318 CodeMirror.defaults[name] = deflt;
3319 if (handle) optionHandlers[name] =
3320 notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
3321 }
3322
3323 var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
3324
3325 // These two are, on init, called from the constructor because they
3326 // have to be initialized before the editor can start at all.
3327 option("value", "", function(cm, val) {
3328 cm.setValue(val);
3329 }, true);
3330 option("mode", null, function(cm, val) {
3331 cm.doc.modeOption = val;
3332 loadMode(cm);
3333 }, true);
3334
3335 option("indentUnit", 2, loadMode, true);
3336 option("indentWithTabs", false);
3337 option("smartIndent", true);
3338 option("tabSize", 4, function(cm) {
3339 resetModeState(cm);
3340 clearCaches(cm);
3341 regChange(cm);
3342 }, true);
3343 option("specialChars", /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/g, function(cm, val) {
3344 cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g");
3345 cm.refresh();
3346 }, true);
3347 option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true);
3348 option("electricChars", true);
3349 option("rtlMoveVisually", !windows);
3350 option("wholeLineUpdateBefore", true);
3351
3352 option("theme", "default", function(cm) {
3353 themeChanged(cm);
3354 guttersChanged(cm);
3355 }, true);
3356 option("keyMap", "default", keyMapChanged);
3357 option("extraKeys", null);
3358
3359 option("onKeyEvent", null);
3360 option("onDragEvent", null);
3361
3362 option("lineWrapping", false, wrappingChanged, true);
3363 option("gutters", [], function(cm) {
3364 setGuttersForLineNumbers(cm.options);
3365 guttersChanged(cm);
3366 }, true);
3367 option("fixedGutter", true, function(cm, val) {
3368 cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0";
3369 cm.refresh();
3370 }, true);
3371 option("coverGutterNextToScrollbar", false, updateScrollbars, true);
3372 option("lineNumbers", false, function(cm) {
3373 setGuttersForLineNumbers(cm.options);
3374 guttersChanged(cm);
3375 }, true);
3376 option("firstLineNumber", 1, guttersChanged, true);
3377 option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
3378 option("showCursorWhenSelecting", false, updateSelection, true);
3379
3380 option("resetSelectionOnContextMenu", true);
3381
3382 option("readOnly", false, function(cm, val) {
3383 if (val == "nocursor") {
3384 onBlur(cm);
3385 cm.display.input.blur();
3386 cm.display.disabled = true;
3387 } else {
3388 cm.display.disabled = false;
3389 if (!val) resetInput(cm, true);
3390 }
3391 });
3392 option("disableInput", false, function(cm, val) {if (!val) resetInput(cm, true);}, true);
3393 option("dragDrop", true);
3394
3395 option("cursorBlinkRate", 530);
3396 option("cursorScrollMargin", 0);
3397 option("cursorHeight", 1);
3398 option("workTime", 100);
3399 option("workDelay", 100);
3400 option("flattenSpans", true, resetModeState, true);
3401 option("addModeClass", false, resetModeState, true);
3402 option("pollInterval", 100);
3403 option("undoDepth", 40, function(cm, val){cm.doc.history.undoDepth = val;});
3404 option("historyEventDelay", 500);
3405 option("viewportMargin", 10, function(cm){cm.refresh();}, true);
3406 option("maxHighlightLength", 10000, resetModeState, true);
3407 option("crudeMeasuringFrom", 10000);
3408 option("moveInputWithCursor", true, function(cm, val) {
3409 if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0;
3410 });
3411
3412 option("tabindex", null, function(cm, val) {
3413 cm.display.input.tabIndex = val || "";
3414 });
3415 option("autofocus", null);
3416
3417 // MODE DEFINITION AND QUERYING
3418
3419 // Known modes, by name and by MIME
3420 var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
3421
3422 CodeMirror.defineMode = function(name, mode) {
3423 if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
3424 if (arguments.length > 2) {
3425 mode.dependencies = [];
3426 for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
3427 }
3428 modes[name] = mode;
3429 };
3430
3431 CodeMirror.defineMIME = function(mime, spec) {
3432 mimeModes[mime] = spec;
3433 };
3434
3435 CodeMirror.resolveMode = function(spec) {
3436 if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) {
3437 spec = mimeModes[spec];
3438 } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) {
3439 var found = mimeModes[spec.name];
3440 spec = createObj(found, spec);
3441 spec.name = found.name;
3442 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) {
3443 return CodeMirror.resolveMode("application/xml");
3444 }
3445 if (typeof spec == "string") return {name: spec};
3446 else return spec || {name: "null"};
3447 };
3448
3449 CodeMirror.getMode = function(options, spec) {
3450 var spec = CodeMirror.resolveMode(spec);
3451 var mfactory = modes[spec.name];
3452 if (!mfactory) return CodeMirror.getMode(options, "text/plain");
3453 var modeObj = mfactory(options, spec);
3454 if (modeExtensions.hasOwnProperty(spec.name)) {
3455 var exts = modeExtensions[spec.name];
3456 for (var prop in exts) {
3457 if (!exts.hasOwnProperty(prop)) continue;
3458 if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
3459 modeObj[prop] = exts[prop];
3460 }
3461 }
3462 modeObj.name = spec.name;
3463 if (spec.helperType) modeObj.helperType = spec.helperType;
3464 if (spec.modeProps) for (var prop in spec.modeProps)
3465 modeObj[prop] = spec.modeProps[prop];
3466
3467 return modeObj;
3468 };
3469
3470 CodeMirror.defineMode("null", function() {
3471 return {token: function(stream) {stream.skipToEnd();}};
3472 });
3473 CodeMirror.defineMIME("text/plain", "null");
3474
3475 var modeExtensions = CodeMirror.modeExtensions = {};
3476 CodeMirror.extendMode = function(mode, properties) {
3477 var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
3478 copyObj(properties, exts);
3479 };
3480
3481 // EXTENSIONS
3482
3483 CodeMirror.defineExtension = function(name, func) {
3484 CodeMirror.prototype[name] = func;
3485 };
3486 CodeMirror.defineDocExtension = function(name, func) {
3487 Doc.prototype[name] = func;
3488 };
3489 CodeMirror.defineOption = option;
3490
3491 var initHooks = [];
3492 CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
3493
3494 var helpers = CodeMirror.helpers = {};
3495 CodeMirror.registerHelper = function(type, name, value) {
3496 if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []};
3497 helpers[type][name] = value;
3498 };
3499 CodeMirror.registerGlobalHelper = function(type, name, predicate, value) {
3500 CodeMirror.registerHelper(type, name, value);
3501 helpers[type]._global.push({pred: predicate, val: value});
3502 };
3503
3504 // UTILITIES
3505
3506 CodeMirror.isWordChar = isWordChar;
3507
3508 // MODE STATE HANDLING
3509
3510 // Utility functions for working with state. Exported because modes
3511 // sometimes need to do this.
3512 function copyState(mode, state) {
3513 if (state === true) return state;
3514 if (mode.copyState) return mode.copyState(state);
3515 var nstate = {};
3516 for (var n in state) {
3517 var val = state[n];
3518 if (val instanceof Array) val = val.concat([]);
3519 nstate[n] = val;
3520 }
3521 return nstate;
3522 }
3523 CodeMirror.copyState = copyState;
3524
3525 function startState(mode, a1, a2) {
3526 return mode.startState ? mode.startState(a1, a2) : true;
3527 }
3528 CodeMirror.startState = startState;
3529
3530 CodeMirror.innerMode = function(mode, state) {
3531 while (mode.innerMode) {
3532 var info = mode.innerMode(state);
3533 if (!info || info.mode == mode) break;
3534 state = info.state;
3535 mode = info.mode;
3536 }
3537 return info || {mode: mode, state: state};
3538 };
3539
3540 // STANDARD COMMANDS
3541
3542 var commands = CodeMirror.commands = {
3543 selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()));},
3544 killLine: function(cm) {
3545 var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
3546 if (!sel && cm.getLine(from.line).length == from.ch)
3547 cm.replaceRange("", from, Pos(from.line + 1, 0), "+delete");
3548 else cm.replaceRange("", from, sel ? to : Pos(from.line), "+delete");
3549 },
3550 deleteLine: function(cm) {
3551 var l = cm.getCursor().line;
3552 cm.replaceRange("", Pos(l, 0), Pos(l), "+delete");
3553 },
3554 delLineLeft: function(cm) {
3555 var cur = cm.getCursor();
3556 cm.replaceRange("", Pos(cur.line, 0), cur, "+delete");
3557 },
3558 undo: function(cm) {cm.undo();},
3559 redo: function(cm) {cm.redo();},
3560 goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));},
3561 goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));},
3562 goLineStart: function(cm) {
3563 cm.extendSelection(lineStart(cm, cm.getCursor().line));
3564 },
3565 goLineStartSmart: function(cm) {
3566 var cur = cm.getCursor(), start = lineStart(cm, cur.line);
3567 var line = cm.getLineHandle(start.line);
3568 var order = getOrder(line);
3569 if (!order || order[0].level == 0) {
3570 var firstNonWS = Math.max(0, line.text.search(/\S/));
3571 var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch;
3572 cm.extendSelection(Pos(start.line, inWS ? 0 : firstNonWS));
3573 } else cm.extendSelection(start);
3574 },
3575 goLineEnd: function(cm) {
3576 cm.extendSelection(lineEnd(cm, cm.getCursor().line));
3577 },
3578 goLineRight: function(cm) {
3579 var top = cm.charCoords(cm.getCursor(), "div").top + 5;
3580 cm.extendSelection(cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div"));
3581 },
3582 goLineLeft: function(cm) {
3583 var top = cm.charCoords(cm.getCursor(), "div").top + 5;
3584 cm.extendSelection(cm.coordsChar({left: 0, top: top}, "div"));
3585 },
3586 goLineUp: function(cm) {cm.moveV(-1, "line");},
3587 goLineDown: function(cm) {cm.moveV(1, "line");},
3588 goPageUp: function(cm) {cm.moveV(-1, "page");},
3589 goPageDown: function(cm) {cm.moveV(1, "page");},
3590 goCharLeft: function(cm) {cm.moveH(-1, "char");},
3591 goCharRight: function(cm) {cm.moveH(1, "char");},
3592 goColumnLeft: function(cm) {cm.moveH(-1, "column");},
3593 goColumnRight: function(cm) {cm.moveH(1, "column");},
3594 goWordLeft: function(cm) {cm.moveH(-1, "word");},
3595 goGroupRight: function(cm) {cm.moveH(1, "group");},
3596 goGroupLeft: function(cm) {cm.moveH(-1, "group");},
3597 goWordRight: function(cm) {cm.moveH(1, "word");},
3598 delCharBefore: function(cm) {cm.deleteH(-1, "char");},
3599 delCharAfter: function(cm) {cm.deleteH(1, "char");},
3600 delWordBefore: function(cm) {cm.deleteH(-1, "word");},
3601 delWordAfter: function(cm) {cm.deleteH(1, "word");},
3602 delGroupBefore: function(cm) {cm.deleteH(-1, "group");},
3603 delGroupAfter: function(cm) {cm.deleteH(1, "group");},
3604 indentAuto: function(cm) {cm.indentSelection("smart");},
3605 indentMore: function(cm) {cm.indentSelection("add");},
3606 indentLess: function(cm) {cm.indentSelection("subtract");},
3607 insertTab: function(cm) {
3608 cm.replaceSelection("\t", "end", "+input");
3609 },
3610 defaultTab: function(cm) {
3611 if (cm.somethingSelected()) cm.indentSelection("add");
3612 else cm.replaceSelection("\t", "end", "+input");
3613 },
3614 transposeChars: function(cm) {
3615 var cur = cm.getCursor(), line = cm.getLine(cur.line);
3616 if (cur.ch > 0 && cur.ch < line.length - 1)
3617 cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
3618 Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1));
3619 },
3620 newlineAndIndent: function(cm) {
3621 operation(cm, function() {
3622 cm.replaceSelection("\n", "end", "+input");
3623 cm.indentLine(cm.getCursor().line, null, true);
3624 })();
3625 },
3626 toggleOverwrite: function(cm) {cm.toggleOverwrite();}
3627 };
3628
3629 // STANDARD KEYMAPS
3630
3631 var keyMap = CodeMirror.keyMap = {};
3632 keyMap.basic = {
3633 "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
3634 "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
3635 "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore",
3636 "Tab": "defaultTab", "Shift-Tab": "indentAuto",
3637 "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
3638 };
3639 // Note that the save and find-related commands aren't defined by
3640 // default. Unknown commands are simply ignored.
3641 keyMap.pcDefault = {
3642 "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
3643 "Ctrl-Home": "goDocStart", "Ctrl-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
3644 "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
3645 "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find",
3646 "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
3647 "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
3648 fallthrough: "basic"
3649 };
3650 keyMap.macDefault = {
3651 "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
3652 "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft",
3653 "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delGroupBefore",
3654 "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find",
3655 "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
3656 "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft",
3657 fallthrough: ["basic", "emacsy"]
3658 };
3659 keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
3660 keyMap.emacsy = {
3661 "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
3662 "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
3663 "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
3664 "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
3665 };
3666
3667 // KEYMAP DISPATCH
3668
3669 function getKeyMap(val) {
3670 if (typeof val == "string") return keyMap[val];
3671 else return val;
3672 }
3673
3674 function lookupKey(name, maps, handle) {
3675 function lookup(map) {
3676 map = getKeyMap(map);
3677 var found = map[name];
3678 if (found === false) return "stop";
3679 if (found != null && handle(found)) return true;
3680 if (map.nofallthrough) return "stop";
3681
3682 var fallthrough = map.fallthrough;
3683 if (fallthrough == null) return false;
3684 if (Object.prototype.toString.call(fallthrough) != "[object Array]")
3685 return lookup(fallthrough);
3686 for (var i = 0, e = fallthrough.length; i < e; ++i) {
3687 var done = lookup(fallthrough[i]);
3688 if (done) return done;
3689 }
3690 return false;
3691 }
3692
3693 for (var i = 0; i < maps.length; ++i) {
3694 var done = lookup(maps[i]);
3695 if (done) return done != "stop";
3696 }
3697 }
3698 function isModifierKey(event) {
3699 var name = keyNames[event.keyCode];
3700 return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
3701 }
3702 function keyName(event, noShift) {
3703 if (opera && event.keyCode == 34 && event["char"]) return false;
3704 var name = keyNames[event.keyCode];
3705 if (name == null || event.altGraphKey) return false;
3706 if (event.altKey) name = "Alt-" + name;
3707 if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name;
3708 if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name;
3709 if (!noShift && event.shiftKey) name = "Shift-" + name;
3710 return name;
3711 }
3712 CodeMirror.lookupKey = lookupKey;
3713 CodeMirror.isModifierKey = isModifierKey;
3714 CodeMirror.keyName = keyName;
3715
3716 // FROMTEXTAREA
3717
3718 CodeMirror.fromTextArea = function(textarea, options) {
3719 if (!options) options = {};
3720 options.value = textarea.value;
3721 if (!options.tabindex && textarea.tabindex)
3722 options.tabindex = textarea.tabindex;
3723 if (!options.placeholder && textarea.placeholder)
3724 options.placeholder = textarea.placeholder;
3725 // Set autofocus to true if this textarea is focused, or if it has
3726 // autofocus and no other element is focused.
3727 if (options.autofocus == null) {
3728 var hasFocus = document.body;
3729 // doc.activeElement occasionally throws on IE
3730 try { hasFocus = document.activeElement; } catch(e) {}
3731 options.autofocus = hasFocus == textarea ||
3732 textarea.getAttribute("autofocus") != null && hasFocus == document.body;
3733 }
3734
3735 function save() {textarea.value = cm.getValue();}
3736 if (textarea.form) {
3737 on(textarea.form, "submit", save);
3738 // Deplorable hack to make the submit method do the right thing.
3739 if (!options.leaveSubmitMethodAlone) {
3740 var form = textarea.form, realSubmit = form.submit;
3741 try {
3742 var wrappedSubmit = form.submit = function() {
3743 save();
3744 form.submit = realSubmit;
3745 form.submit();
3746 form.submit = wrappedSubmit;
3747 };
3748 } catch(e) {}
3749 }
3750 }
3751
3752 textarea.style.display = "none";
3753 var cm = CodeMirror(function(node) {
3754 textarea.parentNode.insertBefore(node, textarea.nextSibling);
3755 }, options);
3756 cm.save = save;
3757 cm.getTextArea = function() { return textarea; };
3758 cm.toTextArea = function() {
3759 save();
3760 textarea.parentNode.removeChild(cm.getWrapperElement());
3761 textarea.style.display = "";
3762 if (textarea.form) {
3763 off(textarea.form, "submit", save);
3764 if (typeof textarea.form.submit == "function")
3765 textarea.form.submit = realSubmit;
3766 }
3767 };
3768 return cm;
3769 };
3770
3771 // STRING STREAM
3772
3773 // Fed to the mode parsers, provides helper functions to make
3774 // parsers more succinct.
3775
3776 // The character stream used by a mode's parser.
3777 function StringStream(string, tabSize) {
3778 this.pos = this.start = 0;
3779 this.string = string;
3780 this.tabSize = tabSize || 8;
3781 this.lastColumnPos = this.lastColumnValue = 0;
3782 this.lineStart = 0;
3783 }
3784
3785 StringStream.prototype = {
3786 eol: function() {return this.pos >= this.string.length;},
3787 sol: function() {return this.pos == this.lineStart;},
3788 peek: function() {return this.string.charAt(this.pos) || undefined;},
3789 next: function() {
3790 if (this.pos < this.string.length)
3791 return this.string.charAt(this.pos++);
3792 },
3793 eat: function(match) {
3794 var ch = this.string.charAt(this.pos);
3795 if (typeof match == "string") var ok = ch == match;
3796 else var ok = ch && (match.test ? match.test(ch) : match(ch));
3797 if (ok) {++this.pos; return ch;}
3798 },
3799 eatWhile: function(match) {
3800 var start = this.pos;
3801 while (this.eat(match)){}
3802 return this.pos > start;
3803 },
3804 eatSpace: function() {
3805 var start = this.pos;
3806 while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
3807 return this.pos > start;
3808 },
3809 skipToEnd: function() {this.pos = this.string.length;},
3810 skipTo: function(ch) {
3811 var found = this.string.indexOf(ch, this.pos);
3812 if (found > -1) {this.pos = found; return true;}
3813 },
3814 backUp: function(n) {this.pos -= n;},
3815 column: function() {
3816 if (this.lastColumnPos < this.start) {
3817 this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue);
3818 this.lastColumnPos = this.start;
3819 }
3820 return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
3821 },
3822 indentation: function() {
3823 return countColumn(this.string, null, this.tabSize) -
3824 (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0);
3825 },
3826 match: function(pattern, consume, caseInsensitive) {
3827 if (typeof pattern == "string") {
3828 var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
3829 var substr = this.string.substr(this.pos, pattern.length);
3830 if (cased(substr) == cased(pattern)) {
3831 if (consume !== false) this.pos += pattern.length;
3832 return true;
3833 }
3834 } else {
3835 var match = this.string.slice(this.pos).match(pattern);
3836 if (match && match.index > 0) return null;
3837 if (match && consume !== false) this.pos += match[0].length;
3838 return match;
3839 }
3840 },
3841 current: function(){return this.string.slice(this.start, this.pos);},
3842 hideFirstChars: function(n, inner) {
3843 this.lineStart += n;
3844 try { return inner(); }
3845 finally { this.lineStart -= n; }
3846 }
3847 };
3848 CodeMirror.StringStream = StringStream;
3849
3850 // TEXTMARKERS
3851
3852 function TextMarker(doc, type) {
3853 this.lines = [];
3854 this.type = type;
3855 this.doc = doc;
3856 }
3857 CodeMirror.TextMarker = TextMarker;
3858 eventMixin(TextMarker);
3859
3860 TextMarker.prototype.clear = function() {
3861 if (this.explicitlyCleared) return;
3862 var cm = this.doc.cm, withOp = cm && !cm.curOp;
3863 if (withOp) startOperation(cm);
3864 if (hasHandler(this, "clear")) {
3865 var found = this.find();
3866 if (found) signalLater(this, "clear", found.from, found.to);
3867 }
3868 var min = null, max = null;
3869 for (var i = 0; i < this.lines.length; ++i) {
3870 var line = this.lines[i];
3871 var span = getMarkedSpanFor(line.markedSpans, this);
3872 if (span.to != null) max = lineNo(line);
3873 line.markedSpans = removeMarkedSpan(line.markedSpans, span);
3874 if (span.from != null)
3875 min = lineNo(line);
3876 else if (this.collapsed && !lineIsHidden(this.doc, line) && cm)
3877 updateLineHeight(line, textHeight(cm.display));
3878 }
3879 if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) {
3880 var visual = visualLine(cm.doc, this.lines[i]), len = lineLength(cm.doc, visual);
3881 if (len > cm.display.maxLineLength) {
3882 cm.display.maxLine = visual;
3883 cm.display.maxLineLength = len;
3884 cm.display.maxLineChanged = true;
3885 }
3886 }
3887
3888 if (min != null && cm) regChange(cm, min, max + 1);
3889 this.lines.length = 0;
3890 this.explicitlyCleared = true;
3891 if (this.atomic && this.doc.cantEdit) {
3892 this.doc.cantEdit = false;
3893 if (cm) reCheckSelection(cm);
3894 }
3895 if (withOp) endOperation(cm);
3896 };
3897
3898 TextMarker.prototype.find = function(bothSides) {
3899 var from, to;
3900 for (var i = 0; i < this.lines.length; ++i) {
3901 var line = this.lines[i];
3902 var span = getMarkedSpanFor(line.markedSpans, this);
3903 if (span.from != null || span.to != null) {
3904 var found = lineNo(line);
3905 if (span.from != null) from = Pos(found, span.from);
3906 if (span.to != null) to = Pos(found, span.to);
3907 }
3908 }
3909 if (this.type == "bookmark" && !bothSides) return from;
3910 return from && {from: from, to: to};
3911 };
3912
3913 TextMarker.prototype.changed = function() {
3914 var pos = this.find(), cm = this.doc.cm;
3915 if (!pos || !cm) return;
3916 if (this.type != "bookmark") pos = pos.from;
3917 var line = getLine(this.doc, pos.line);
3918 clearCachedMeasurement(cm, line);
3919 if (pos.line >= cm.display.showingFrom && pos.line < cm.display.showingTo) {
3920 for (var node = cm.display.lineDiv.firstChild; node; node = node.nextSibling) if (node.lineObj == line) {
3921 if (node.offsetHeight != line.height) updateLineHeight(line, node.offsetHeight);
3922 break;
3923 }
3924 runInOp(cm, function() {
3925 cm.curOp.selectionChanged = cm.curOp.forceUpdate = cm.curOp.updateMaxLine = true;
3926 });
3927 }
3928 };
3929
3930 TextMarker.prototype.attachLine = function(line) {
3931 if (!this.lines.length && this.doc.cm) {
3932 var op = this.doc.cm.curOp;
3933 if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1)
3934 (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this);
3935 }
3936 this.lines.push(line);
3937 };
3938 TextMarker.prototype.detachLine = function(line) {
3939 this.lines.splice(indexOf(this.lines, line), 1);
3940 if (!this.lines.length && this.doc.cm) {
3941 var op = this.doc.cm.curOp;
3942 (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this);
3943 }
3944 };
3945
3946 var nextMarkerId = 0;
3947
3948 function markText(doc, from, to, options, type) {
3949 if (options && options.shared) return markTextShared(doc, from, to, options, type);
3950 if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type);
3951
3952 var marker = new TextMarker(doc, type);
3953 if (options) copyObj(options, marker);
3954 if (posLess(to, from) || posEq(from, to) && marker.clearWhenEmpty !== false)
3955 return marker;
3956 if (marker.replacedWith) {
3957 marker.collapsed = true;
3958 marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget");
3959 if (!options.handleMouseEvents) marker.replacedWith.ignoreEvents = true;
3960 }
3961 if (marker.collapsed) {
3962 if (conflictingCollapsedRange(doc, from.line, from, to, marker) ||
3963 from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker))
3964 throw new Error("Inserting collapsed marker partially overlapping an existing one");
3965 sawCollapsedSpans = true;
3966 }
3967
3968 if (marker.addToHistory)
3969 addToHistory(doc, {from: from, to: to, origin: "markText"},
3970 {head: doc.sel.head, anchor: doc.sel.anchor}, NaN);
3971
3972 var curLine = from.line, cm = doc.cm, updateMaxLine;
3973 doc.iter(curLine, to.line + 1, function(line) {
3974 if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(doc, line) == cm.display.maxLine)
3975 updateMaxLine = true;
3976 var span = {from: null, to: null, marker: marker};
3977 if (curLine == from.line) span.from = from.ch;
3978 if (curLine == to.line) span.to = to.ch;
3979 if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0);
3980 addMarkedSpan(line, span);
3981 ++curLine;
3982 });
3983 if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) {
3984 if (lineIsHidden(doc, line)) updateLineHeight(line, 0);
3985 });
3986
3987 if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); });
3988
3989 if (marker.readOnly) {
3990 sawReadOnlySpans = true;
3991 if (doc.history.done.length || doc.history.undone.length)
3992 doc.clearHistory();
3993 }
3994 if (marker.collapsed) {
3995 marker.id = ++nextMarkerId;
3996 marker.atomic = true;
3997 }
3998 if (cm) {
3999 if (updateMaxLine) cm.curOp.updateMaxLine = true;
4000 if (marker.className || marker.title || marker.startStyle || marker.endStyle || marker.collapsed)
4001 regChange(cm, from.line, to.line + 1);
4002 if (marker.atomic) reCheckSelection(cm);
4003 }
4004 return marker;
4005 }
4006
4007 // SHARED TEXTMARKERS
4008
4009 function SharedTextMarker(markers, primary) {
4010 this.markers = markers;
4011 this.primary = primary;
4012 for (var i = 0, me = this; i < markers.length; ++i) {
4013 markers[i].parent = this;
4014 on(markers[i], "clear", function(){me.clear();});
4015 }
4016 }
4017 CodeMirror.SharedTextMarker = SharedTextMarker;
4018 eventMixin(SharedTextMarker);
4019
4020 SharedTextMarker.prototype.clear = function() {
4021 if (this.explicitlyCleared) return;
4022 this.explicitlyCleared = true;
4023 for (var i = 0; i < this.markers.length; ++i)
4024 this.markers[i].clear();
4025 signalLater(this, "clear");
4026 };
4027 SharedTextMarker.prototype.find = function() {
4028 return this.primary.find();
4029 };
4030
4031 function markTextShared(doc, from, to, options, type) {
4032 options = copyObj(options);
4033 options.shared = false;
4034 var markers = [markText(doc, from, to, options, type)], primary = markers[0];
4035 var widget = options.replacedWith;
4036 linkedDocs(doc, function(doc) {
4037 if (widget) options.replacedWith = widget.cloneNode(true);
4038 markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type));
4039 for (var i = 0; i < doc.linked.length; ++i)
4040 if (doc.linked[i].isParent) return;
4041 primary = lst(markers);
4042 });
4043 return new SharedTextMarker(markers, primary);
4044 }
4045
4046 // TEXTMARKER SPANS
4047
4048 function getMarkedSpanFor(spans, marker) {
4049 if (spans) for (var i = 0; i < spans.length; ++i) {
4050 var span = spans[i];
4051 if (span.marker == marker) return span;
4052 }
4053 }
4054 function removeMarkedSpan(spans, span) {
4055 for (var r, i = 0; i < spans.length; ++i)
4056 if (spans[i] != span) (r || (r = [])).push(spans[i]);
4057 return r;
4058 }
4059 function addMarkedSpan(line, span) {
4060 line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
4061 span.marker.attachLine(line);
4062 }
4063
4064 function markedSpansBefore(old, startCh, isInsert) {
4065 if (old) for (var i = 0, nw; i < old.length; ++i) {
4066 var span = old[i], marker = span.marker;
4067 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
4068 if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) {
4069 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
4070 (nw || (nw = [])).push({from: span.from,
4071 to: endsAfter ? null : span.to,
4072 marker: marker});
4073 }
4074 }
4075 return nw;
4076 }
4077
4078 function markedSpansAfter(old, endCh, isInsert) {
4079 if (old) for (var i = 0, nw; i < old.length; ++i) {
4080 var span = old[i], marker = span.marker;
4081 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
4082 if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) {
4083 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
4084 (nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh,
4085 to: span.to == null ? null : span.to - endCh,
4086 marker: marker});
4087 }
4088 }
4089 return nw;
4090 }
4091
4092 function stretchSpansOverChange(doc, change) {
4093 var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans;
4094 var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans;
4095 if (!oldFirst && !oldLast) return null;
4096
4097 var startCh = change.from.ch, endCh = change.to.ch, isInsert = posEq(change.from, change.to);
4098 // Get the spans that 'stick out' on both sides
4099 var first = markedSpansBefore(oldFirst, startCh, isInsert);
4100 var last = markedSpansAfter(oldLast, endCh, isInsert);
4101
4102 // Next, merge those two ends
4103 var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0);
4104 if (first) {
4105 // Fix up .to properties of first
4106 for (var i = 0; i < first.length; ++i) {
4107 var span = first[i];
4108 if (span.to == null) {
4109 var found = getMarkedSpanFor(last, span.marker);
4110 if (!found) span.to = startCh;
4111 else if (sameLine) span.to = found.to == null ? null : found.to + offset;
4112 }
4113 }
4114 }
4115 if (last) {
4116 // Fix up .from in last (or move them into first in case of sameLine)
4117 for (var i = 0; i < last.length; ++i) {
4118 var span = last[i];
4119 if (span.to != null) span.to += offset;
4120 if (span.from == null) {
4121 var found = getMarkedSpanFor(first, span.marker);
4122 if (!found) {
4123 span.from = offset;
4124 if (sameLine) (first || (first = [])).push(span);
4125 }
4126 } else {
4127 span.from += offset;
4128 if (sameLine) (first || (first = [])).push(span);
4129 }
4130 }
4131 }
4132 // Make sure we didn't create any zero-length spans
4133 if (first) first = clearEmptySpans(first);
4134 if (last && last != first) last = clearEmptySpans(last);
4135
4136 var newMarkers = [first];
4137 if (!sameLine) {
4138 // Fill gap with whole-line-spans
4139 var gap = change.text.length - 2, gapMarkers;
4140 if (gap > 0 && first)
4141 for (var i = 0; i < first.length; ++i)
4142 if (first[i].to == null)
4143 (gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker});
4144 for (var i = 0; i < gap; ++i)
4145 newMarkers.push(gapMarkers);
4146 newMarkers.push(last);
4147 }
4148 return newMarkers;
4149 }
4150
4151 function clearEmptySpans(spans) {
4152 for (var i = 0; i < spans.length; ++i) {
4153 var span = spans[i];
4154 if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false)
4155 spans.splice(i--, 1);
4156 }
4157 if (!spans.length) return null;
4158 return spans;
4159 }
4160
4161 function mergeOldSpans(doc, change) {
4162 var old = getOldSpans(doc, change);
4163 var stretched = stretchSpansOverChange(doc, change);
4164 if (!old) return stretched;
4165 if (!stretched) return old;
4166
4167 for (var i = 0; i < old.length; ++i) {
4168 var oldCur = old[i], stretchCur = stretched[i];
4169 if (oldCur && stretchCur) {
4170 spans: for (var j = 0; j < stretchCur.length; ++j) {
4171 var span = stretchCur[j];
4172 for (var k = 0; k < oldCur.length; ++k)
4173 if (oldCur[k].marker == span.marker) continue spans;
4174 oldCur.push(span);
4175 }
4176 } else if (stretchCur) {
4177 old[i] = stretchCur;
4178 }
4179 }
4180 return old;
4181 }
4182
4183 function removeReadOnlyRanges(doc, from, to) {
4184 var markers = null;
4185 doc.iter(from.line, to.line + 1, function(line) {
4186 if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
4187 var mark = line.markedSpans[i].marker;
4188 if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
4189 (markers || (markers = [])).push(mark);
4190 }
4191 });
4192 if (!markers) return null;
4193 var parts = [{from: from, to: to}];
4194 for (var i = 0; i < markers.length; ++i) {
4195 var mk = markers[i], m = mk.find();
4196 for (var j = 0; j < parts.length; ++j) {
4197 var p = parts[j];
4198 if (posLess(p.to, m.from) || posLess(m.to, p.from)) continue;
4199 var newParts = [j, 1];
4200 if (posLess(p.from, m.from) || !mk.inclusiveLeft && posEq(p.from, m.from))
4201 newParts.push({from: p.from, to: m.from});
4202 if (posLess(m.to, p.to) || !mk.inclusiveRight && posEq(p.to, m.to))
4203 newParts.push({from: m.to, to: p.to});
4204 parts.splice.apply(parts, newParts);
4205 j += newParts.length - 1;
4206 }
4207 }
4208 return parts;
4209 }
4210
4211 function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; }
4212 function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; }
4213
4214 function compareCollapsedMarkers(a, b) {
4215 var lenDiff = a.lines.length - b.lines.length;
4216 if (lenDiff != 0) return lenDiff;
4217 var aPos = a.find(), bPos = b.find();
4218 var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b);
4219 if (fromCmp) return -fromCmp;
4220 var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b);
4221 if (toCmp) return toCmp;
4222 return b.id - a.id;
4223 }
4224
4225 function collapsedSpanAtSide(line, start) {
4226 var sps = sawCollapsedSpans && line.markedSpans, found;
4227 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
4228 sp = sps[i];
4229 if (sp.marker.collapsed && (start ? sp.from : sp.to) == null &&
4230 (!found || compareCollapsedMarkers(found, sp.marker) < 0))
4231 found = sp.marker;
4232 }
4233 return found;
4234 }
4235 function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); }
4236 function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); }
4237
4238 function conflictingCollapsedRange(doc, lineNo, from, to, marker) {
4239 var line = getLine(doc, lineNo);
4240 var sps = sawCollapsedSpans && line.markedSpans;
4241 if (sps) for (var i = 0; i < sps.length; ++i) {
4242 var sp = sps[i];
4243 if (!sp.marker.collapsed) continue;
4244 var found = sp.marker.find(true);
4245 var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker);
4246 var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker);
4247 if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue;
4248 if (fromCmp <= 0 && (cmp(found.to, from) || extraRight(sp.marker) - extraLeft(marker)) > 0 ||
4249 fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRight(marker)) < 0)
4250 return true;
4251 }
4252 }
4253
4254 function visualLine(doc, line) {
4255 var merged;
4256 while (merged = collapsedSpanAtStart(line))
4257 line = getLine(doc, merged.find().from.line);
4258 return line;
4259 }
4260
4261 function lineIsHidden(doc, line) {
4262 var sps = sawCollapsedSpans && line.markedSpans;
4263 if (sps) for (var sp, i = 0; i < sps.length; ++i) {
4264 sp = sps[i];
4265 if (!sp.marker.collapsed) continue;
4266 if (sp.from == null) return true;
4267 if (sp.marker.replacedWith) continue;
4268 if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp))
4269 return true;
4270 }
4271 }
4272 function lineIsHiddenInner(doc, line, span) {
4273 if (span.to == null) {
4274 var end = span.marker.find().to, endLine = getLine(doc, end.line);
4275 return lineIsHiddenInner(doc, endLine, getMarkedSpanFor(endLine.markedSpans, span.marker));
4276 }
4277 if (span.marker.inclusiveRight && span.to == line.text.length)
4278 return true;
4279 for (var sp, i = 0; i < line.markedSpans.length; ++i) {
4280 sp = line.markedSpans[i];
4281 if (sp.marker.collapsed && !sp.marker.replacedWith && sp.from == span.to &&
4282 (sp.to == null || sp.to != span.from) &&
4283 (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
4284 lineIsHiddenInner(doc, line, sp)) return true;
4285 }
4286 }
4287
4288 function detachMarkedSpans(line) {
4289 var spans = line.markedSpans;
4290 if (!spans) return;
4291 for (var i = 0; i < spans.length; ++i)
4292 spans[i].marker.detachLine(line);
4293 line.markedSpans = null;
4294 }
4295
4296 function attachMarkedSpans(line, spans) {
4297 if (!spans) return;
4298 for (var i = 0; i < spans.length; ++i)
4299 spans[i].marker.attachLine(line);
4300 line.markedSpans = spans;
4301 }
4302
4303 // LINE WIDGETS
4304
4305 var LineWidget = CodeMirror.LineWidget = function(cm, node, options) {
4306 if (options) for (var opt in options) if (options.hasOwnProperty(opt))
4307 this[opt] = options[opt];
4308 this.cm = cm;
4309 this.node = node;
4310 };
4311 eventMixin(LineWidget);
4312 function widgetOperation(f) {
4313 return function() {
4314 var withOp = !this.cm.curOp;
4315 if (withOp) startOperation(this.cm);
4316 try {var result = f.apply(this, arguments);}
4317 finally {if (withOp) endOperation(this.cm);}
4318 return result;
4319 };
4320 }
4321 LineWidget.prototype.clear = widgetOperation(function() {
4322 var ws = this.line.widgets, no = lineNo(this.line);
4323 if (no == null || !ws) return;
4324 for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1);
4325 if (!ws.length) this.line.widgets = null;
4326 var aboveVisible = heightAtLine(this.cm, this.line) < this.cm.doc.scrollTop;
4327 updateLineHeight(this.line, Math.max(0, this.line.height - widgetHeight(this)));
4328 if (aboveVisible) addToScrollPos(this.cm, 0, -this.height);
4329 regChange(this.cm, no, no + 1);
4330 });
4331 LineWidget.prototype.changed = widgetOperation(function() {
4332 var oldH = this.height;
4333 this.height = null;
4334 var diff = widgetHeight(this) - oldH;
4335 if (!diff) return;
4336 updateLineHeight(this.line, this.line.height + diff);
4337 var no = lineNo(this.line);
4338 regChange(this.cm, no, no + 1);
4339 });
4340
4341 function widgetHeight(widget) {
4342 if (widget.height != null) return widget.height;
4343 if (!widget.node.parentNode || widget.node.parentNode.nodeType != 1)
4344 removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative"));
4345 return widget.height = widget.node.offsetHeight;
4346 }
4347
4348 function addLineWidget(cm, handle, node, options) {
4349 var widget = new LineWidget(cm, node, options);
4350 if (widget.noHScroll) cm.display.alignWidgets = true;
4351 changeLine(cm, handle, function(line) {
4352 var widgets = line.widgets || (line.widgets = []);
4353 if (widget.insertAt == null) widgets.push(widget);
4354 else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget);
4355 widget.line = line;
4356 if (!lineIsHidden(cm.doc, line) || widget.showIfHidden) {
4357 var aboveVisible = heightAtLine(cm, line) < cm.doc.scrollTop;
4358 updateLineHeight(line, line.height + widgetHeight(widget));
4359 if (aboveVisible) addToScrollPos(cm, 0, widget.height);
4360 }
4361 return true;
4362 });
4363 return widget;
4364 }
4365
4366 // LINE DATA STRUCTURE
4367
4368 // Line objects. These hold state related to a line, including
4369 // highlighting info (the styles array).
4370 var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) {
4371 this.text = text;
4372 attachMarkedSpans(this, markedSpans);
4373 this.height = estimateHeight ? estimateHeight(this) : 1;
4374 };
4375 eventMixin(Line);
4376 Line.prototype.lineNo = function() { return lineNo(this); };
4377
4378 function updateLine(line, text, markedSpans, estimateHeight) {
4379 line.text = text;
4380 if (line.stateAfter) line.stateAfter = null;
4381 if (line.styles) line.styles = null;
4382 if (line.order != null) line.order = null;
4383 detachMarkedSpans(line);
4384 attachMarkedSpans(line, markedSpans);
4385 var estHeight = estimateHeight ? estimateHeight(line) : 1;
4386 if (estHeight != line.height) updateLineHeight(line, estHeight);
4387 }
4388
4389 function cleanUpLine(line) {
4390 line.parent = null;
4391 detachMarkedSpans(line);
4392 }
4393
4394 // Run the given mode's parser over a line, update the styles
4395 // array, which contains alternating fragments of text and CSS
4396 // classes.
4397 function runMode(cm, text, mode, state, f, forceToEnd) {
4398 var flattenSpans = mode.flattenSpans;
4399 if (flattenSpans == null) flattenSpans = cm.options.flattenSpans;
4400 var curStart = 0, curStyle = null;
4401 var stream = new StringStream(text, cm.options.tabSize), style;
4402 if (text == "" && mode.blankLine) mode.blankLine(state);
4403 while (!stream.eol()) {
4404 if (stream.pos > cm.options.maxHighlightLength) {
4405 flattenSpans = false;
4406 if (forceToEnd) processLine(cm, text, state, stream.pos);
4407 stream.pos = text.length;
4408 style = null;
4409 } else {
4410 style = mode.token(stream, state);
4411 }
4412 if (cm.options.addModeClass) {
4413 var mName = CodeMirror.innerMode(mode, state).mode.name;
4414 if (mName) style = "m-" + (style ? mName + " " + style : mName);
4415 }
4416 if (!flattenSpans || curStyle != style) {
4417 if (curStart < stream.start) f(stream.start, curStyle);
4418 curStart = stream.start; curStyle = style;
4419 }
4420 stream.start = stream.pos;
4421 }
4422 while (curStart < stream.pos) {
4423 // Webkit seems to refuse to render text nodes longer than 57444 characters
4424 var pos = Math.min(stream.pos, curStart + 50000);
4425 f(pos, curStyle);
4426 curStart = pos;
4427 }
4428 }
4429
4430 function highlightLine(cm, line, state, forceToEnd) {
4431 // A styles array always starts with a number identifying the
4432 // mode/overlays that it is based on (for easy invalidation).
4433 var st = [cm.state.modeGen];
4434 // Compute the base array of styles
4435 runMode(cm, line.text, cm.doc.mode, state, function(end, style) {
4436 st.push(end, style);
4437 }, forceToEnd);
4438
4439 // Run overlays, adjust style array.
4440 for (var o = 0; o < cm.state.overlays.length; ++o) {
4441 var overlay = cm.state.overlays[o], i = 1, at = 0;
4442 runMode(cm, line.text, overlay.mode, true, function(end, style) {
4443 var start = i;
4444 // Ensure there's a token end at the current position, and that i points at it
4445 while (at < end) {
4446 var i_end = st[i];
4447 if (i_end > end)
4448 st.splice(i, 1, end, st[i+1], i_end);
4449 i += 2;
4450 at = Math.min(end, i_end);
4451 }
4452 if (!style) return;
4453 if (overlay.opaque) {
4454 st.splice(start, i - start, end, style);
4455 i = start + 2;
4456 } else {
4457 for (; start < i; start += 2) {
4458 var cur = st[start+1];
4459 st[start+1] = cur ? cur + " " + style : style;
4460 }
4461 }
4462 });
4463 }
4464
4465 return st;
4466 }
4467
4468 function getLineStyles(cm, line) {
4469 if (!line.styles || line.styles[0] != cm.state.modeGen)
4470 line.styles = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
4471 return line.styles;
4472 }
4473
4474 // Lightweight form of highlight -- proceed over this line and
4475 // update state, but don't save a style array.
4476 function processLine(cm, text, state, startAt) {
4477 var mode = cm.doc.mode;
4478 var stream = new StringStream(text, cm.options.tabSize);
4479 stream.start = stream.pos = startAt || 0;
4480 if (text == "" && mode.blankLine) mode.blankLine(state);
4481 while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) {
4482 mode.token(stream, state);
4483 stream.start = stream.pos;
4484 }
4485 }
4486
4487 var styleToClassCache = {}, styleToClassCacheWithMode = {};
4488 function interpretTokenStyle(style, builder) {
4489 if (!style) return null;
4490 for (;;) {
4491 var lineClass = style.match(/(?:^|\s+)line-(background-)?(\S+)/);
4492 if (!lineClass) break;
4493 style = style.slice(0, lineClass.index) + style.slice(lineClass.index + lineClass[0].length);
4494 var prop = lineClass[1] ? "bgClass" : "textClass";
4495 if (builder[prop] == null)
4496 builder[prop] = lineClass[2];
4497 else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(builder[prop]))
4498 builder[prop] += " " + lineClass[2];
4499 }
4500 if (/^\s*$/.test(style)) return null;
4501 var cache = builder.cm.options.addModeClass ? styleToClassCacheWithMode : styleToClassCache;
4502 return cache[style] ||
4503 (cache[style] = style.replace(/\S+/g, "cm-$&"));
4504 }
4505
4506 function buildLineContent(cm, realLine, measure, copyWidgets) {
4507 var merged, line = realLine, empty = true;
4508 while (merged = collapsedSpanAtStart(line))
4509 line = getLine(cm.doc, merged.find().from.line);
4510
4511 var builder = {pre: elt("pre"), col: 0, pos: 0,
4512 measure: null, measuredSomething: false, cm: cm,
4513 copyWidgets: copyWidgets};
4514
4515 do {
4516 if (line.text) empty = false;
4517 builder.measure = line == realLine && measure;
4518 builder.pos = 0;
4519 builder.addToken = builder.measure ? buildTokenMeasure : buildToken;
4520 if ((ie || webkit) && cm.getOption("lineWrapping"))
4521 builder.addToken = buildTokenSplitSpaces(builder.addToken);
4522 var next = insertLineContent(line, builder, getLineStyles(cm, line));
4523 if (measure && line == realLine && !builder.measuredSomething) {
4524 measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure));
4525 builder.measuredSomething = true;
4526 }
4527 if (next) line = getLine(cm.doc, next.to.line);
4528 } while (next);
4529
4530 if (measure && !builder.measuredSomething && !measure[0])
4531 measure[0] = builder.pre.appendChild(empty ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure));
4532 if (!builder.pre.firstChild && !lineIsHidden(cm.doc, realLine))
4533 builder.pre.appendChild(document.createTextNode("\u00a0"));
4534
4535 var order;
4536 // Work around problem with the reported dimensions of single-char
4537 // direction spans on IE (issue #1129). See also the comment in
4538 // cursorCoords.
4539 if (measure && ie && (order = getOrder(line))) {
4540 var l = order.length - 1;
4541 if (order[l].from == order[l].to) --l;
4542 var last = order[l], prev = order[l - 1];
4543 if (last.from + 1 == last.to && prev && last.level < prev.level) {
4544 var span = measure[builder.pos - 1];
4545 if (span) span.parentNode.insertBefore(span.measureRight = zeroWidthElement(cm.display.measure),
4546 span.nextSibling);
4547 }
4548 }
4549
4550 var textClass = builder.textClass ? builder.textClass + " " + (realLine.textClass || "") : realLine.textClass;
4551 if (textClass) builder.pre.className = textClass;
4552
4553 signal(cm, "renderLine", cm, realLine, builder.pre);
4554 return builder;
4555 }
4556
4557 function defaultSpecialCharPlaceholder(ch) {
4558 var token = elt("span", "\u2022", "cm-invalidchar");
4559 token.title = "\\u" + ch.charCodeAt(0).toString(16);
4560 return token;
4561 }
4562
4563 function buildToken(builder, text, style, startStyle, endStyle, title) {
4564 if (!text) return;
4565 var special = builder.cm.options.specialChars;
4566 if (!special.test(text)) {
4567 builder.col += text.length;
4568 var content = document.createTextNode(text);
4569 } else {
4570 var content = document.createDocumentFragment(), pos = 0;
4571 while (true) {
4572 special.lastIndex = pos;
4573 var m = special.exec(text);
4574 var skipped = m ? m.index - pos : text.length - pos;
4575 if (skipped) {
4576 content.appendChild(document.createTextNode(text.slice(pos, pos + skipped)));
4577 builder.col += skipped;
4578 }
4579 if (!m) break;
4580 pos += skipped + 1;
4581 if (m[0] == "\t") {
4582 var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
4583 content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
4584 builder.col += tabWidth;
4585 } else {
4586 var token = builder.cm.options.specialCharPlaceholder(m[0]);
4587 content.appendChild(token);
4588 builder.col += 1;
4589 }
4590 }
4591 }
4592 if (style || startStyle || endStyle || builder.measure) {
4593 var fullStyle = style || "";
4594 if (startStyle) fullStyle += startStyle;
4595 if (endStyle) fullStyle += endStyle;
4596 var token = elt("span", [content], fullStyle);
4597 if (title) token.title = title;
4598 return builder.pre.appendChild(token);
4599 }
4600 builder.pre.appendChild(content);
4601 }
4602
4603 function buildTokenMeasure(builder, text, style, startStyle, endStyle) {
4604 var wrapping = builder.cm.options.lineWrapping;
4605 for (var i = 0; i < text.length; ++i) {
4606 var start = i == 0, to = i + 1;
4607 while (to < text.length && isExtendingChar(text.charAt(to))) ++to;
4608 var ch = text.slice(i, to);
4609 i = to - 1;
4610 if (i && wrapping && spanAffectsWrapping(text, i))
4611 builder.pre.appendChild(elt("wbr"));
4612 var old = builder.measure[builder.pos];
4613 var span = builder.measure[builder.pos] =
4614 buildToken(builder, ch, style,
4615 start && startStyle, i == text.length - 1 && endStyle);
4616 if (old) span.leftSide = old.leftSide || old;
4617 // In IE single-space nodes wrap differently than spaces
4618 // embedded in larger text nodes, except when set to
4619 // white-space: normal (issue #1268).
4620 if (old_ie && wrapping && ch == " " && i && !/\s/.test(text.charAt(i - 1)) &&
4621 i < text.length - 1 && !/\s/.test(text.charAt(i + 1)))
4622 span.style.whiteSpace = "normal";
4623 builder.pos += ch.length;
4624 }
4625 if (text.length) builder.measuredSomething = true;
4626 }
4627
4628 function buildTokenSplitSpaces(inner) {
4629 function split(old) {
4630 var out = " ";
4631 for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0";
4632 out += " ";
4633 return out;
4634 }
4635 return function(builder, text, style, startStyle, endStyle, title) {
4636 return inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title);
4637 };
4638 }
4639
4640 function buildCollapsedSpan(builder, size, marker, ignoreWidget) {
4641 var widget = !ignoreWidget && marker.replacedWith;
4642 if (widget) {
4643 if (builder.copyWidgets) widget = widget.cloneNode(true);
4644 builder.pre.appendChild(widget);
4645 if (builder.measure) {
4646 if (size) {
4647 builder.measure[builder.pos] = widget;
4648 } else {
4649 var elt = zeroWidthElement(builder.cm.display.measure);
4650 if (marker.type == "bookmark" && !marker.insertLeft)
4651 builder.measure[builder.pos] = builder.pre.appendChild(elt);
4652 else if (builder.measure[builder.pos])
4653 return;
4654 else
4655 builder.measure[builder.pos] = builder.pre.insertBefore(elt, widget);
4656 }
4657 builder.measuredSomething = true;
4658 }
4659 }
4660 builder.pos += size;
4661 }
4662
4663 // Outputs a number of spans to make up a line, taking highlighting
4664 // and marked text into account.
4665 function insertLineContent(line, builder, styles) {
4666 var spans = line.markedSpans, allText = line.text, at = 0;
4667 if (!spans) {
4668 for (var i = 1; i < styles.length; i+=2)
4669 builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder));
4670 return;
4671 }
4672
4673 var len = allText.length, pos = 0, i = 1, text = "", style;
4674 var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed;
4675 for (;;) {
4676 if (nextChange == pos) { // Update current marker set
4677 spanStyle = spanEndStyle = spanStartStyle = title = "";
4678 collapsed = null; nextChange = Infinity;
4679 var foundBookmarks = [];
4680 for (var j = 0; j < spans.length; ++j) {
4681 var sp = spans[j], m = sp.marker;
4682 if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
4683 if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
4684 if (m.className) spanStyle += " " + m.className;
4685 if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
4686 if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
4687 if (m.title && !title) title = m.title;
4688 if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0))
4689 collapsed = sp;
4690 } else if (sp.from > pos && nextChange > sp.from) {
4691 nextChange = sp.from;
4692 }
4693 if (m.type == "bookmark" && sp.from == pos && m.replacedWith) foundBookmarks.push(m);
4694 }
4695 if (collapsed && (collapsed.from || 0) == pos) {
4696 buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos,
4697 collapsed.marker, collapsed.from == null);
4698 if (collapsed.to == null) return collapsed.marker.find();
4699 }
4700 if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookmarks.length; ++j)
4701 buildCollapsedSpan(builder, 0, foundBookmarks[j]);
4702 }
4703 if (pos >= len) break;
4704
4705 var upto = Math.min(len, nextChange);
4706 while (true) {
4707 if (text) {
4708 var end = pos + text.length;
4709 if (!collapsed) {
4710 var tokenText = end > upto ? text.slice(0, upto - pos) : text;
4711 builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle,
4712 spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title);
4713 }
4714 if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
4715 pos = end;
4716 spanStartStyle = "";
4717 }
4718 text = allText.slice(at, at = styles[i++]);
4719 style = interpretTokenStyle(styles[i++], builder);
4720 }
4721 }
4722 }
4723
4724 // DOCUMENT DATA STRUCTURE
4725
4726 function updateDoc(doc, change, markedSpans, selAfter, estimateHeight) {
4727 function spansFor(n) {return markedSpans ? markedSpans[n] : null;}
4728 function update(line, text, spans) {
4729 updateLine(line, text, spans, estimateHeight);
4730 signalLater(line, "change", line, change);
4731 }
4732
4733 var from = change.from, to = change.to, text = change.text;
4734 var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
4735 var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line;
4736
4737 // First adjust the line structure
4738 if (from.ch == 0 && to.ch == 0 && lastText == "" &&
4739 (!doc.cm || doc.cm.options.wholeLineUpdateBefore)) {
4740 // This is a whole-line replace. Treated specially to make
4741 // sure line objects move the way they are supposed to.
4742 for (var i = 0, e = text.length - 1, added = []; i < e; ++i)
4743 added.push(new Line(text[i], spansFor(i), estimateHeight));
4744 update(lastLine, lastLine.text, lastSpans);
4745 if (nlines) doc.remove(from.line, nlines);
4746 if (added.length) doc.insert(from.line, added);
4747 } else if (firstLine == lastLine) {
4748 if (text.length == 1) {
4749 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans);
4750 } else {
4751 for (var added = [], i = 1, e = text.length - 1; i < e; ++i)
4752 added.push(new Line(text[i], spansFor(i), estimateHeight));
4753 added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight));
4754 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4755 doc.insert(from.line + 1, added);
4756 }
4757 } else if (text.length == 1) {
4758 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0));
4759 doc.remove(from.line + 1, nlines);
4760 } else {
4761 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0));
4762 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans);
4763 for (var i = 1, e = text.length - 1, added = []; i < e; ++i)
4764 added.push(new Line(text[i], spansFor(i), estimateHeight));
4765 if (nlines > 1) doc.remove(from.line + 1, nlines - 1);
4766 doc.insert(from.line + 1, added);
4767 }
4768
4769 signalLater(doc, "change", doc, change);
4770 setSelection(doc, selAfter.anchor, selAfter.head, null, true);
4771 }
4772
4773 function LeafChunk(lines) {
4774 this.lines = lines;
4775 this.parent = null;
4776 for (var i = 0, e = lines.length, height = 0; i < e; ++i) {
4777 lines[i].parent = this;
4778 height += lines[i].height;
4779 }
4780 this.height = height;
4781 }
4782
4783 LeafChunk.prototype = {
4784 chunkSize: function() { return this.lines.length; },
4785 removeInner: function(at, n) {
4786 for (var i = at, e = at + n; i < e; ++i) {
4787 var line = this.lines[i];
4788 this.height -= line.height;
4789 cleanUpLine(line);
4790 signalLater(line, "delete");
4791 }
4792 this.lines.splice(at, n);
4793 },
4794 collapse: function(lines) {
4795 lines.splice.apply(lines, [lines.length, 0].concat(this.lines));
4796 },
4797 insertInner: function(at, lines, height) {
4798 this.height += height;
4799 this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
4800 for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;
4801 },
4802 iterN: function(at, n, op) {
4803 for (var e = at + n; at < e; ++at)
4804 if (op(this.lines[at])) return true;
4805 }
4806 };
4807
4808 function BranchChunk(children) {
4809 this.children = children;
4810 var size = 0, height = 0;
4811 for (var i = 0, e = children.length; i < e; ++i) {
4812 var ch = children[i];
4813 size += ch.chunkSize(); height += ch.height;
4814 ch.parent = this;
4815 }
4816 this.size = size;
4817 this.height = height;
4818 this.parent = null;
4819 }
4820
4821 BranchChunk.prototype = {
4822 chunkSize: function() { return this.size; },
4823 removeInner: function(at, n) {
4824 this.size -= n;
4825 for (var i = 0; i < this.children.length; ++i) {
4826 var child = this.children[i], sz = child.chunkSize();
4827 if (at < sz) {
4828 var rm = Math.min(n, sz - at), oldHeight = child.height;
4829 child.removeInner(at, rm);
4830 this.height -= oldHeight - child.height;
4831 if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
4832 if ((n -= rm) == 0) break;
4833 at = 0;
4834 } else at -= sz;
4835 }
4836 if (this.size - n < 25) {
4837 var lines = [];
4838 this.collapse(lines);
4839 this.children = [new LeafChunk(lines)];
4840 this.children[0].parent = this;
4841 }
4842 },
4843 collapse: function(lines) {
4844 for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);
4845 },
4846 insertInner: function(at, lines, height) {
4847 this.size += lines.length;
4848 this.height += height;
4849 for (var i = 0, e = this.children.length; i < e; ++i) {
4850 var child = this.children[i], sz = child.chunkSize();
4851 if (at <= sz) {
4852 child.insertInner(at, lines, height);
4853 if (child.lines && child.lines.length > 50) {
4854 while (child.lines.length > 50) {
4855 var spilled = child.lines.splice(child.lines.length - 25, 25);
4856 var newleaf = new LeafChunk(spilled);
4857 child.height -= newleaf.height;
4858 this.children.splice(i + 1, 0, newleaf);
4859 newleaf.parent = this;
4860 }
4861 this.maybeSpill();
4862 }
4863 break;
4864 }
4865 at -= sz;
4866 }
4867 },
4868 maybeSpill: function() {
4869 if (this.children.length <= 10) return;
4870 var me = this;
4871 do {
4872 var spilled = me.children.splice(me.children.length - 5, 5);
4873 var sibling = new BranchChunk(spilled);
4874 if (!me.parent) { // Become the parent node
4875 var copy = new BranchChunk(me.children);
4876 copy.parent = me;
4877 me.children = [copy, sibling];
4878 me = copy;
4879 } else {
4880 me.size -= sibling.size;
4881 me.height -= sibling.height;
4882 var myIndex = indexOf(me.parent.children, me);
4883 me.parent.children.splice(myIndex + 1, 0, sibling);
4884 }
4885 sibling.parent = me.parent;
4886 } while (me.children.length > 10);
4887 me.parent.maybeSpill();
4888 },
4889 iterN: function(at, n, op) {
4890 for (var i = 0, e = this.children.length; i < e; ++i) {
4891 var child = this.children[i], sz = child.chunkSize();
4892 if (at < sz) {
4893 var used = Math.min(n, sz - at);
4894 if (child.iterN(at, used, op)) return true;
4895 if ((n -= used) == 0) break;
4896 at = 0;
4897 } else at -= sz;
4898 }
4899 }
4900 };
4901
4902 var nextDocId = 0;
4903 var Doc = CodeMirror.Doc = function(text, mode, firstLine) {
4904 if (!(this instanceof Doc)) return new Doc(text, mode, firstLine);
4905 if (firstLine == null) firstLine = 0;
4906
4907 BranchChunk.call(this, [new LeafChunk([new Line("", null)])]);
4908 this.first = firstLine;
4909 this.scrollTop = this.scrollLeft = 0;
4910 this.cantEdit = false;
4911 this.history = makeHistory();
4912 this.cleanGeneration = 1;
4913 this.frontier = firstLine;
4914 var start = Pos(firstLine, 0);
4915 this.sel = {from: start, to: start, head: start, anchor: start, shift: false, extend: false, goalColumn: null};
4916 this.id = ++nextDocId;
4917 this.modeOption = mode;
4918
4919 if (typeof text == "string") text = splitLines(text);
4920 updateDoc(this, {from: start, to: start, text: text}, null, {head: start, anchor: start});
4921 };
4922
4923 Doc.prototype = createObj(BranchChunk.prototype, {
4924 constructor: Doc,
4925 iter: function(from, to, op) {
4926 if (op) this.iterN(from - this.first, to - from, op);
4927 else this.iterN(this.first, this.first + this.size, from);
4928 },
4929
4930 insert: function(at, lines) {
4931 var height = 0;
4932 for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
4933 this.insertInner(at - this.first, lines, height);
4934 },
4935 remove: function(at, n) { this.removeInner(at - this.first, n); },
4936
4937 getValue: function(lineSep) {
4938 var lines = getLines(this, this.first, this.first + this.size);
4939 if (lineSep === false) return lines;
4940 return lines.join(lineSep || "\n");
4941 },
4942 setValue: function(code) {
4943 var top = Pos(this.first, 0), last = this.first + this.size - 1;
4944 makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length),
4945 text: splitLines(code), origin: "setValue"},
4946 {head: top, anchor: top}, true);
4947 },
4948 replaceRange: function(code, from, to, origin) {
4949 from = clipPos(this, from);
4950 to = to ? clipPos(this, to) : from;
4951 replaceRange(this, code, from, to, origin);
4952 },
4953 getRange: function(from, to, lineSep) {
4954 var lines = getBetween(this, clipPos(this, from), clipPos(this, to));
4955 if (lineSep === false) return lines;
4956 return lines.join(lineSep || "\n");
4957 },
4958
4959 getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
4960 setLine: function(line, text) {
4961 if (isLine(this, line))
4962 replaceRange(this, text, Pos(line, 0), clipPos(this, Pos(line)));
4963 },
4964 removeLine: function(line) {
4965 if (line) replaceRange(this, "", clipPos(this, Pos(line - 1)), clipPos(this, Pos(line)));
4966 else replaceRange(this, "", Pos(0, 0), clipPos(this, Pos(1, 0)));
4967 },
4968
4969 getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);},
4970 getLineNumber: function(line) {return lineNo(line);},
4971
4972 getLineHandleVisualStart: function(line) {
4973 if (typeof line == "number") line = getLine(this, line);
4974 return visualLine(this, line);
4975 },
4976
4977 lineCount: function() {return this.size;},
4978 firstLine: function() {return this.first;},
4979 lastLine: function() {return this.first + this.size - 1;},
4980
4981 clipPos: function(pos) {return clipPos(this, pos);},
4982
4983 getCursor: function(start) {
4984 var sel = this.sel, pos;
4985 if (start == null || start == "head") pos = sel.head;
4986 else if (start == "anchor") pos = sel.anchor;
4987 else if (start == "end" || start === false) pos = sel.to;
4988 else pos = sel.from;
4989 return copyPos(pos);
4990 },
4991 somethingSelected: function() {return !posEq(this.sel.head, this.sel.anchor);},
4992
4993 setCursor: docOperation(function(line, ch, extend) {
4994 var pos = clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line);
4995 if (extend) extendSelection(this, pos);
4996 else setSelection(this, pos, pos);
4997 }),
4998 setSelection: docOperation(function(anchor, head, bias) {
4999 setSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), bias);
5000 }),
5001 extendSelection: docOperation(function(from, to, bias) {
5002 extendSelection(this, clipPos(this, from), to && clipPos(this, to), bias);
5003 }),
5004
5005 getSelection: function(lineSep) {return this.getRange(this.sel.from, this.sel.to, lineSep);},
5006 replaceSelection: function(code, collapse, origin) {
5007 makeChange(this, {from: this.sel.from, to: this.sel.to, text: splitLines(code), origin: origin}, collapse || "around");
5008 },
5009 undo: docOperation(function() {makeChangeFromHistory(this, "undo");}),
5010 redo: docOperation(function() {makeChangeFromHistory(this, "redo");}),
5011
5012 setExtending: function(val) {this.sel.extend = val;},
5013
5014 historySize: function() {
5015 var hist = this.history;
5016 return {undo: hist.done.length, redo: hist.undone.length};
5017 },
5018 clearHistory: function() {this.history = makeHistory(this.history.maxGeneration);},
5019
5020 markClean: function() {
5021 this.cleanGeneration = this.changeGeneration(true);
5022 },
5023 changeGeneration: function(forceSplit) {
5024 if (forceSplit)
5025 this.history.lastOp = this.history.lastOrigin = null;
5026 return this.history.generation;
5027 },
5028 isClean: function (gen) {
5029 return this.history.generation == (gen || this.cleanGeneration);
5030 },
5031
5032 getHistory: function() {
5033 return {done: copyHistoryArray(this.history.done),
5034 undone: copyHistoryArray(this.history.undone)};
5035 },
5036 setHistory: function(histData) {
5037 var hist = this.history = makeHistory(this.history.maxGeneration);
5038 hist.done = histData.done.slice(0);
5039 hist.undone = histData.undone.slice(0);
5040 },
5041
5042 markText: function(from, to, options) {
5043 return markText(this, clipPos(this, from), clipPos(this, to), options, "range");
5044 },
5045 setBookmark: function(pos, options) {
5046 var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options),
5047 insertLeft: options && options.insertLeft,
5048 clearWhenEmpty: false};
5049 pos = clipPos(this, pos);
5050 return markText(this, pos, pos, realOpts, "bookmark");
5051 },
5052 findMarksAt: function(pos) {
5053 pos = clipPos(this, pos);
5054 var markers = [], spans = getLine(this, pos.line).markedSpans;
5055 if (spans) for (var i = 0; i < spans.length; ++i) {
5056 var span = spans[i];
5057 if ((span.from == null || span.from <= pos.ch) &&
5058 (span.to == null || span.to >= pos.ch))
5059 markers.push(span.marker.parent || span.marker);
5060 }
5061 return markers;
5062 },
5063 getAllMarks: function() {
5064 var markers = [];
5065 this.iter(function(line) {
5066 var sps = line.markedSpans;
5067 if (sps) for (var i = 0; i < sps.length; ++i)
5068 if (sps[i].from != null) markers.push(sps[i].marker);
5069 });
5070 return markers;
5071 },
5072
5073 posFromIndex: function(off) {
5074 var ch, lineNo = this.first;
5075 this.iter(function(line) {
5076 var sz = line.text.length + 1;
5077 if (sz > off) { ch = off; return true; }
5078 off -= sz;
5079 ++lineNo;
5080 });
5081 return clipPos(this, Pos(lineNo, ch));
5082 },
5083 indexFromPos: function (coords) {
5084 coords = clipPos(this, coords);
5085 var index = coords.ch;
5086 if (coords.line < this.first || coords.ch < 0) return 0;
5087 this.iter(this.first, coords.line, function (line) {
5088 index += line.text.length + 1;
5089 });
5090 return index;
5091 },
5092
5093 copy: function(copyHistory) {
5094 var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first);
5095 doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft;
5096 doc.sel = {from: this.sel.from, to: this.sel.to, head: this.sel.head, anchor: this.sel.anchor,
5097 shift: this.sel.shift, extend: false, goalColumn: this.sel.goalColumn};
5098 if (copyHistory) {
5099 doc.history.undoDepth = this.history.undoDepth;
5100 doc.setHistory(this.getHistory());
5101 }
5102 return doc;
5103 },
5104
5105 linkedDoc: function(options) {
5106 if (!options) options = {};
5107 var from = this.first, to = this.first + this.size;
5108 if (options.from != null && options.from > from) from = options.from;
5109 if (options.to != null && options.to < to) to = options.to;
5110 var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from);
5111 if (options.sharedHist) copy.history = this.history;
5112 (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist});
5113 copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}];
5114 return copy;
5115 },
5116 unlinkDoc: function(other) {
5117 if (other instanceof CodeMirror) other = other.doc;
5118 if (this.linked) for (var i = 0; i < this.linked.length; ++i) {
5119 var link = this.linked[i];
5120 if (link.doc != other) continue;
5121 this.linked.splice(i, 1);
5122 other.unlinkDoc(this);
5123 break;
5124 }
5125 // If the histories were shared, split them again
5126 if (other.history == this.history) {
5127 var splitIds = [other.id];
5128 linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true);
5129 other.history = makeHistory();
5130 other.history.done = copyHistoryArray(this.history.done, splitIds);
5131 other.history.undone = copyHistoryArray(this.history.undone, splitIds);
5132 }
5133 },
5134 iterLinkedDocs: function(f) {linkedDocs(this, f);},
5135
5136 getMode: function() {return this.mode;},
5137 getEditor: function() {return this.cm;}
5138 });
5139
5140 Doc.prototype.eachLine = Doc.prototype.iter;
5141
5142 // The Doc methods that should be available on CodeMirror instances
5143 var dontDelegate = "iter insert remove copy getEditor".split(" ");
5144 for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0)
5145 CodeMirror.prototype[prop] = (function(method) {
5146 return function() {return method.apply(this.doc, arguments);};
5147 })(Doc.prototype[prop]);
5148
5149 eventMixin(Doc);
5150
5151 function linkedDocs(doc, f, sharedHistOnly) {
5152 function propagate(doc, skip, sharedHist) {
5153 if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) {
5154 var rel = doc.linked[i];
5155 if (rel.doc == skip) continue;
5156 var shared = sharedHist && rel.sharedHist;
5157 if (sharedHistOnly && !shared) continue;
5158 f(rel.doc, shared);
5159 propagate(rel.doc, doc, shared);
5160 }
5161 }
5162 propagate(doc, null, true);
5163 }
5164
5165 function attachDoc(cm, doc) {
5166 if (doc.cm) throw new Error("This document is already in use.");
5167 cm.doc = doc;
5168 doc.cm = cm;
5169 estimateLineHeights(cm);
5170 loadMode(cm);
5171 if (!cm.options.lineWrapping) computeMaxLength(cm);
5172 cm.options.mode = doc.modeOption;
5173 regChange(cm);
5174 }
5175
5176 // LINE UTILITIES
5177
5178 function getLine(chunk, n) {
5179 n -= chunk.first;
5180 while (!chunk.lines) {
5181 for (var i = 0;; ++i) {
5182 var child = chunk.children[i], sz = child.chunkSize();
5183 if (n < sz) { chunk = child; break; }
5184 n -= sz;
5185 }
5186 }
5187 return chunk.lines[n];
5188 }
5189
5190 function getBetween(doc, start, end) {
5191 var out = [], n = start.line;
5192 doc.iter(start.line, end.line + 1, function(line) {
5193 var text = line.text;
5194 if (n == end.line) text = text.slice(0, end.ch);
5195 if (n == start.line) text = text.slice(start.ch);
5196 out.push(text);
5197 ++n;
5198 });
5199 return out;
5200 }
5201 function getLines(doc, from, to) {
5202 var out = [];
5203 doc.iter(from, to, function(line) { out.push(line.text); });
5204 return out;
5205 }
5206
5207 function updateLineHeight(line, height) {
5208 var diff = height - line.height;
5209 for (var n = line; n; n = n.parent) n.height += diff;
5210 }
5211
5212 function lineNo(line) {
5213 if (line.parent == null) return null;
5214 var cur = line.parent, no = indexOf(cur.lines, line);
5215 for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
5216 for (var i = 0;; ++i) {
5217 if (chunk.children[i] == cur) break;
5218 no += chunk.children[i].chunkSize();
5219 }
5220 }
5221 return no + cur.first;
5222 }
5223
5224 function lineAtHeight(chunk, h) {
5225 var n = chunk.first;
5226 outer: do {
5227 for (var i = 0, e = chunk.children.length; i < e; ++i) {
5228 var child = chunk.children[i], ch = child.height;
5229 if (h < ch) { chunk = child; continue outer; }
5230 h -= ch;
5231 n += child.chunkSize();
5232 }
5233 return n;
5234 } while (!chunk.lines);
5235 for (var i = 0, e = chunk.lines.length; i < e; ++i) {
5236 var line = chunk.lines[i], lh = line.height;
5237 if (h < lh) break;
5238 h -= lh;
5239 }
5240 return n + i;
5241 }
5242
5243 function heightAtLine(cm, lineObj) {
5244 lineObj = visualLine(cm.doc, lineObj);
5245
5246 var h = 0, chunk = lineObj.parent;
5247 for (var i = 0; i < chunk.lines.length; ++i) {
5248 var line = chunk.lines[i];
5249 if (line == lineObj) break;
5250 else h += line.height;
5251 }
5252 for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
5253 for (var i = 0; i < p.children.length; ++i) {
5254 var cur = p.children[i];
5255 if (cur == chunk) break;
5256 else h += cur.height;
5257 }
5258 }
5259 return h;
5260 }
5261
5262 function getOrder(line) {
5263 var order = line.order;
5264 if (order == null) order = line.order = bidiOrdering(line.text);
5265 return order;
5266 }
5267
5268 // HISTORY
5269
5270 function makeHistory(startGen) {
5271 return {
5272 // Arrays of history events. Doing something adds an event to
5273 // done and clears undo. Undoing moves events from done to
5274 // undone, redoing moves them in the other direction.
5275 done: [], undone: [], undoDepth: Infinity,
5276 // Used to track when changes can be merged into a single undo
5277 // event
5278 lastTime: 0, lastOp: null, lastOrigin: null,
5279 // Used by the isClean() method
5280 generation: startGen || 1, maxGeneration: startGen || 1
5281 };
5282 }
5283
5284 function attachLocalSpans(doc, change, from, to) {
5285 var existing = change["spans_" + doc.id], n = 0;
5286 doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) {
5287 if (line.markedSpans)
5288 (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans;
5289 ++n;
5290 });
5291 }
5292
5293 function historyChangeFromChange(doc, change) {
5294 var from = { line: change.from.line, ch: change.from.ch };
5295 var histChange = {from: from, to: changeEnd(change), text: getBetween(doc, change.from, change.to)};
5296 attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);
5297 linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true);
5298 return histChange;
5299 }
5300
5301 function addToHistory(doc, change, selAfter, opId) {
5302 var hist = doc.history;
5303 hist.undone.length = 0;
5304 var time = +new Date, cur = lst(hist.done);
5305
5306 if (cur &&
5307 (hist.lastOp == opId ||
5308 hist.lastOrigin == change.origin && change.origin &&
5309 ((change.origin.charAt(0) == "+" && doc.cm && hist.lastTime > time - doc.cm.options.historyEventDelay) ||
5310 change.origin.charAt(0) == "*"))) {
5311 // Merge this change into the last event
5312 var last = lst(cur.changes);
5313 if (posEq(change.from, change.to) && posEq(change.from, last.to)) {
5314 // Optimized case for simple insertion -- don't want to add
5315 // new changesets for every character typed
5316 last.to = changeEnd(change);
5317 } else {
5318 // Add new sub-event
5319 cur.changes.push(historyChangeFromChange(doc, change));
5320 }
5321 cur.anchorAfter = selAfter.anchor; cur.headAfter = selAfter.head;
5322 } else {
5323 // Can not be merged, start a new event.
5324 cur = {changes: [historyChangeFromChange(doc, change)],
5325 generation: hist.generation,
5326 anchorBefore: doc.sel.anchor, headBefore: doc.sel.head,
5327 anchorAfter: selAfter.anchor, headAfter: selAfter.head};
5328 hist.done.push(cur);
5329 while (hist.done.length > hist.undoDepth)
5330 hist.done.shift();
5331 }
5332 hist.generation = ++hist.maxGeneration;
5333 hist.lastTime = time;
5334 hist.lastOp = opId;
5335 hist.lastOrigin = change.origin;
5336
5337 if (!last) signal(doc, "historyAdded");
5338 }
5339
5340 function removeClearedSpans(spans) {
5341 if (!spans) return null;
5342 for (var i = 0, out; i < spans.length; ++i) {
5343 if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
5344 else if (out) out.push(spans[i]);
5345 }
5346 return !out ? spans : out.length ? out : null;
5347 }
5348
5349 function getOldSpans(doc, change) {
5350 var found = change["spans_" + doc.id];
5351 if (!found) return null;
5352 for (var i = 0, nw = []; i < change.text.length; ++i)
5353 nw.push(removeClearedSpans(found[i]));
5354 return nw;
5355 }
5356
5357 // Used both to provide a JSON-safe object in .getHistory, and, when
5358 // detaching a document, to split the history in two
5359 function copyHistoryArray(events, newGroup) {
5360 for (var i = 0, copy = []; i < events.length; ++i) {
5361 var event = events[i], changes = event.changes, newChanges = [];
5362 copy.push({changes: newChanges, anchorBefore: event.anchorBefore, headBefore: event.headBefore,
5363 anchorAfter: event.anchorAfter, headAfter: event.headAfter});
5364 for (var j = 0; j < changes.length; ++j) {
5365 var change = changes[j], m;
5366 newChanges.push({from: change.from, to: change.to, text: change.text});
5367 if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) {
5368 if (indexOf(newGroup, Number(m[1])) > -1) {
5369 lst(newChanges)[prop] = change[prop];
5370 delete change[prop];
5371 }
5372 }
5373 }
5374 }
5375 return copy;
5376 }
5377
5378 // Rebasing/resetting history to deal with externally-sourced changes
5379
5380 function rebaseHistSel(pos, from, to, diff) {
5381 if (to < pos.line) {
5382 pos.line += diff;
5383 } else if (from < pos.line) {
5384 pos.line = from;
5385 pos.ch = 0;
5386 }
5387 }
5388
5389 // Tries to rebase an array of history events given a change in the
5390 // document. If the change touches the same lines as the event, the
5391 // event, and everything 'behind' it, is discarded. If the change is
5392 // before the event, the event's positions are updated. Uses a
5393 // copy-on-write scheme for the positions, to avoid having to
5394 // reallocate them all on every rebase, but also avoid problems with
5395 // shared position objects being unsafely updated.
5396 function rebaseHistArray(array, from, to, diff) {
5397 for (var i = 0; i < array.length; ++i) {
5398 var sub = array[i], ok = true;
5399 for (var j = 0; j < sub.changes.length; ++j) {
5400 var cur = sub.changes[j];
5401 if (!sub.copied) { cur.from = copyPos(cur.from); cur.to = copyPos(cur.to); }
5402 if (to < cur.from.line) {
5403 cur.from.line += diff;
5404 cur.to.line += diff;
5405 } else if (from <= cur.to.line) {
5406 ok = false;
5407 break;
5408 }
5409 }
5410 if (!sub.copied) {
5411 sub.anchorBefore = copyPos(sub.anchorBefore); sub.headBefore = copyPos(sub.headBefore);
5412 sub.anchorAfter = copyPos(sub.anchorAfter); sub.readAfter = copyPos(sub.headAfter);
5413 sub.copied = true;
5414 }
5415 if (!ok) {
5416 array.splice(0, i + 1);
5417 i = 0;
5418 } else {
5419 rebaseHistSel(sub.anchorBefore); rebaseHistSel(sub.headBefore);
5420 rebaseHistSel(sub.anchorAfter); rebaseHistSel(sub.headAfter);
5421 }
5422 }
5423 }
5424
5425 function rebaseHist(hist, change) {
5426 var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1;
5427 rebaseHistArray(hist.done, from, to, diff);
5428 rebaseHistArray(hist.undone, from, to, diff);
5429 }
5430
5431 // EVENT OPERATORS
5432
5433 function stopMethod() {e_stop(this);}
5434 // Ensure an event has a stop method.
5435 function addStop(event) {
5436 if (!event.stop) event.stop = stopMethod;
5437 return event;
5438 }
5439
5440 function e_preventDefault(e) {
5441 if (e.preventDefault) e.preventDefault();
5442 else e.returnValue = false;
5443 }
5444 function e_stopPropagation(e) {
5445 if (e.stopPropagation) e.stopPropagation();
5446 else e.cancelBubble = true;
5447 }
5448 function e_defaultPrevented(e) {
5449 return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false;
5450 }
5451 function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
5452 CodeMirror.e_stop = e_stop;
5453 CodeMirror.e_preventDefault = e_preventDefault;
5454 CodeMirror.e_stopPropagation = e_stopPropagation;
5455
5456 function e_target(e) {return e.target || e.srcElement;}
5457 function e_button(e) {
5458 var b = e.which;
5459 if (b == null) {
5460 if (e.button & 1) b = 1;
5461 else if (e.button & 2) b = 3;
5462 else if (e.button & 4) b = 2;
5463 }
5464 if (mac && e.ctrlKey && b == 1) b = 3;
5465 return b;
5466 }
5467
5468 // EVENT HANDLING
5469
5470 function on(emitter, type, f) {
5471 if (emitter.addEventListener)
5472 emitter.addEventListener(type, f, false);
5473 else if (emitter.attachEvent)
5474 emitter.attachEvent("on" + type, f);
5475 else {
5476 var map = emitter._handlers || (emitter._handlers = {});
5477 var arr = map[type] || (map[type] = []);
5478 arr.push(f);
5479 }
5480 }
5481
5482 function off(emitter, type, f) {
5483 if (emitter.removeEventListener)
5484 emitter.removeEventListener(type, f, false);
5485 else if (emitter.detachEvent)
5486 emitter.detachEvent("on" + type, f);
5487 else {
5488 var arr = emitter._handlers && emitter._handlers[type];
5489 if (!arr) return;
5490 for (var i = 0; i < arr.length; ++i)
5491 if (arr[i] == f) { arr.splice(i, 1); break; }
5492 }
5493 }
5494
5495 function signal(emitter, type /*, values...*/) {
5496 var arr = emitter._handlers && emitter._handlers[type];
5497 if (!arr) return;
5498 var args = Array.prototype.slice.call(arguments, 2);
5499 for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
5500 }
5501
5502 var delayedCallbacks, delayedCallbackDepth = 0;
5503 function signalLater(emitter, type /*, values...*/) {
5504 var arr = emitter._handlers && emitter._handlers[type];
5505 if (!arr) return;
5506 var args = Array.prototype.slice.call(arguments, 2);
5507 if (!delayedCallbacks) {
5508 ++delayedCallbackDepth;
5509 delayedCallbacks = [];
5510 setTimeout(fireDelayed, 0);
5511 }
5512 function bnd(f) {return function(){f.apply(null, args);};};
5513 for (var i = 0; i < arr.length; ++i)
5514 delayedCallbacks.push(bnd(arr[i]));
5515 }
5516
5517 function signalDOMEvent(cm, e, override) {
5518 signal(cm, override || e.type, cm, e);
5519 return e_defaultPrevented(e) || e.codemirrorIgnore;
5520 }
5521
5522 function fireDelayed() {
5523 --delayedCallbackDepth;
5524 var delayed = delayedCallbacks;
5525 delayedCallbacks = null;
5526 for (var i = 0; i < delayed.length; ++i) delayed[i]();
5527 }
5528
5529 function hasHandler(emitter, type) {
5530 var arr = emitter._handlers && emitter._handlers[type];
5531 return arr && arr.length > 0;
5532 }
5533
5534 CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;
5535
5536 function eventMixin(ctor) {
5537 ctor.prototype.on = function(type, f) {on(this, type, f);};
5538 ctor.prototype.off = function(type, f) {off(this, type, f);};
5539 }
5540
5541 // MISC UTILITIES
5542
5543 // Number of pixels added to scroller and sizer to hide scrollbar
5544 var scrollerCutOff = 30;
5545
5546 // Returned or thrown by various protocols to signal 'I'm not
5547 // handling this'.
5548 var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
5549
5550 function Delayed() {this.id = null;}
5551 Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};
5552
5553 // Counts the column offset in a string, taking tabs into account.
5554 // Used mostly to find indentation.
5555 function countColumn(string, end, tabSize, startIndex, startValue) {
5556 if (end == null) {
5557 end = string.search(/[^\s\u00a0]/);
5558 if (end == -1) end = string.length;
5559 }
5560 for (var i = startIndex || 0, n = startValue || 0; i < end; ++i) {
5561 if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
5562 else ++n;
5563 }
5564 return n;
5565 }
5566 CodeMirror.countColumn = countColumn;
5567
5568 var spaceStrs = [""];
5569 function spaceStr(n) {
5570 while (spaceStrs.length <= n)
5571 spaceStrs.push(lst(spaceStrs) + " ");
5572 return spaceStrs[n];
5573 }
5574
5575 function lst(arr) { return arr[arr.length-1]; }
5576
5577 function selectInput(node) {
5578 if (ios) { // Mobile Safari apparently has a bug where select() is broken.
5579 node.selectionStart = 0;
5580 node.selectionEnd = node.value.length;
5581 } else {
5582 // Suppress mysterious IE10 errors
5583 try { node.select(); }
5584 catch(_e) {}
5585 }
5586 }
5587
5588 function indexOf(collection, elt) {
5589 if (collection.indexOf) return collection.indexOf(elt);
5590 for (var i = 0, e = collection.length; i < e; ++i)
5591 if (collection[i] == elt) return i;
5592 return -1;
5593 }
5594
5595 function createObj(base, props) {
5596 function Obj() {}
5597 Obj.prototype = base;
5598 var inst = new Obj();
5599 if (props) copyObj(props, inst);
5600 return inst;
5601 }
5602
5603 function copyObj(obj, target) {
5604 if (!target) target = {};
5605 for (var prop in obj) if (obj.hasOwnProperty(prop)) target[prop] = obj[prop];
5606 return target;
5607 }
5608
5609 function emptyArray(size) {
5610 for (var a = [], i = 0; i < size; ++i) a.push(undefined);
5611 return a;
5612 }
5613
5614 function bind(f) {
5615 var args = Array.prototype.slice.call(arguments, 1);
5616 return function(){return f.apply(null, args);};
5617 }
5618
5619 var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/;
5620 function isWordChar(ch) {
5621 return /\w/.test(ch) || ch > "\x80" &&
5622 (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
5623 }
5624
5625 function isEmpty(obj) {
5626 for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false;
5627 return true;
5628 }
5629
5630 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]/;
5631 function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); }
5632
5633 // DOM UTILITIES
5634
5635 function elt(tag, content, className, style) {
5636 var e = document.createElement(tag);
5637 if (className) e.className = className;
5638 if (style) e.style.cssText = style;
5639 if (typeof content == "string") setTextContent(e, content);
5640 else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
5641 return e;
5642 }
5643
5644 function removeChildren(e) {
5645 for (var count = e.childNodes.length; count > 0; --count)
5646 e.removeChild(e.firstChild);
5647 return e;
5648 }
5649
5650 function removeChildrenAndAdd(parent, e) {
5651 return removeChildren(parent).appendChild(e);
5652 }
5653
5654 function setTextContent(e, str) {
5655 if (ie_lt9) {
5656 e.innerHTML = "";
5657 e.appendChild(document.createTextNode(str));
5658 } else e.textContent = str;
5659 }
5660
5661 function getRect(node) {
5662 return node.getBoundingClientRect();
5663 }
5664 CodeMirror.replaceGetRect = function(f) { getRect = f; };
5665
5666 // FEATURE DETECTION
5667
5668 // Detect drag-and-drop
5669 var dragAndDrop = function() {
5670 // There is *some* kind of drag-and-drop support in IE6-8, but I
5671 // couldn't get it to work yet.
5672 if (ie_lt9) return false;
5673 var div = elt('div');
5674 return "draggable" in div || "dragDrop" in div;
5675 }();
5676
5677 // For a reason I have yet to figure out, some browsers disallow
5678 // word wrapping between certain characters *only* if a new inline
5679 // element is started between them. This makes it hard to reliably
5680 // measure the position of things, since that requires inserting an
5681 // extra span. This terribly fragile set of tests matches the
5682 // character combinations that suffer from this phenomenon on the
5683 // various browsers.
5684 function spanAffectsWrapping() { return false; }
5685 if (gecko) // Only for "$'"
5686 spanAffectsWrapping = function(str, i) {
5687 return str.charCodeAt(i - 1) == 36 && str.charCodeAt(i) == 39;
5688 };
5689 else if (safari && !/Version\/([6-9]|\d\d)\b/.test(navigator.userAgent))
5690 spanAffectsWrapping = function(str, i) {
5691 return /\-[^ \-?]|\?[^ !\'\"\),.\-\/:;\?\]\}]/.test(str.slice(i - 1, i + 1));
5692 };
5693 else if (webkit && /Chrome\/(?:29|[3-9]\d|\d\d\d)\./.test(navigator.userAgent))
5694 spanAffectsWrapping = function(str, i) {
5695 var code = str.charCodeAt(i - 1);
5696 return code >= 8208 && code <= 8212;
5697 };
5698 else if (webkit)
5699 spanAffectsWrapping = function(str, i) {
5700 if (i > 1 && str.charCodeAt(i - 1) == 45) {
5701 if (/\w/.test(str.charAt(i - 2)) && /[^\-?\.]/.test(str.charAt(i))) return true;
5702 if (i > 2 && /[\d\.,]/.test(str.charAt(i - 2)) && /[\d\.,]/.test(str.charAt(i))) return false;
5703 }
5704 return /[~!#%&*)=+}\]\\|\"\.>,:;][({[<]|-[^\-?\.\u2010-\u201f\u2026]|\?[\w~`@#$%\^&*(_=+{[|><]|\u2026[\w~`@#$%\^&*(_=+{[><]/.test(str.slice(i - 1, i + 1));
5705 };
5706
5707 var knownScrollbarWidth;
5708 function scrollbarWidth(measure) {
5709 if (knownScrollbarWidth != null) return knownScrollbarWidth;
5710 var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
5711 removeChildrenAndAdd(measure, test);
5712 if (test.offsetWidth)
5713 knownScrollbarWidth = test.offsetHeight - test.clientHeight;
5714 return knownScrollbarWidth || 0;
5715 }
5716
5717 var zwspSupported;
5718 function zeroWidthElement(measure) {
5719 if (zwspSupported == null) {
5720 var test = elt("span", "\u200b");
5721 removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
5722 if (measure.firstChild.offsetHeight != 0)
5723 zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8;
5724 }
5725 if (zwspSupported) return elt("span", "\u200b");
5726 else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
5727 }
5728
5729 // See if "".split is the broken IE version, if so, provide an
5730 // alternative way to split lines.
5731 var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
5732 var pos = 0, result = [], l = string.length;
5733 while (pos <= l) {
5734 var nl = string.indexOf("\n", pos);
5735 if (nl == -1) nl = string.length;
5736 var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
5737 var rt = line.indexOf("\r");
5738 if (rt != -1) {
5739 result.push(line.slice(0, rt));
5740 pos += rt + 1;
5741 } else {
5742 result.push(line);
5743 pos = nl + 1;
5744 }
5745 }
5746 return result;
5747 } : function(string){return string.split(/\r\n?|\n/);};
5748 CodeMirror.splitLines = splitLines;
5749
5750 var hasSelection = window.getSelection ? function(te) {
5751 try { return te.selectionStart != te.selectionEnd; }
5752 catch(e) { return false; }
5753 } : function(te) {
5754 try {var range = te.ownerDocument.selection.createRange();}
5755 catch(e) {}
5756 if (!range || range.parentElement() != te) return false;
5757 return range.compareEndPoints("StartToEnd", range) != 0;
5758 };
5759
5760 var hasCopyEvent = (function() {
5761 var e = elt("div");
5762 if ("oncopy" in e) return true;
5763 e.setAttribute("oncopy", "return;");
5764 return typeof e.oncopy == 'function';
5765 })();
5766
5767 // KEY NAMING
5768
5769 var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
5770 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
5771 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
5772 46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod", 107: "=", 109: "-", 127: "Delete",
5773 173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
5774 221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete",
5775 63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"};
5776 CodeMirror.keyNames = keyNames;
5777 (function() {
5778 // Number keys
5779 for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i);
5780 // Alphabetic keys
5781 for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
5782 // Function keys
5783 for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
5784 })();
5785
5786 // BIDI HELPERS
5787
5788 function iterateBidiSections(order, from, to, f) {
5789 if (!order) return f(from, to, "ltr");
5790 var found = false;
5791 for (var i = 0; i < order.length; ++i) {
5792 var part = order[i];
5793 if (part.from < to && part.to > from || from == to && part.to == from) {
5794 f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
5795 found = true;
5796 }
5797 }
5798 if (!found) f(from, to, "ltr");
5799 }
5800
5801 function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
5802 function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
5803
5804 function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
5805 function lineRight(line) {
5806 var order = getOrder(line);
5807 if (!order) return line.text.length;
5808 return bidiRight(lst(order));
5809 }
5810
5811 function lineStart(cm, lineN) {
5812 var line = getLine(cm.doc, lineN);
5813 var visual = visualLine(cm.doc, line);
5814 if (visual != line) lineN = lineNo(visual);
5815 var order = getOrder(visual);
5816 var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
5817 return Pos(lineN, ch);
5818 }
5819 function lineEnd(cm, lineN) {
5820 var merged, line;
5821 while (merged = collapsedSpanAtEnd(line = getLine(cm.doc, lineN)))
5822 lineN = merged.find().to.line;
5823 var order = getOrder(line);
5824 var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
5825 return Pos(lineN, ch);
5826 }
5827
5828 function compareBidiLevel(order, a, b) {
5829 var linedir = order[0].level;
5830 if (a == linedir) return true;
5831 if (b == linedir) return false;
5832 return a < b;
5833 }
5834 var bidiOther;
5835 function getBidiPartAt(order, pos) {
5836 bidiOther = null;
5837 for (var i = 0, found; i < order.length; ++i) {
5838 var cur = order[i];
5839 if (cur.from < pos && cur.to > pos) return i;
5840 if ((cur.from == pos || cur.to == pos)) {
5841 if (found == null) {
5842 found = i;
5843 } else if (compareBidiLevel(order, cur.level, order[found].level)) {
5844 if (cur.from != cur.to) bidiOther = found;
5845 return i;
5846 } else {
5847 if (cur.from != cur.to) bidiOther = i;
5848 return found;
5849 }
5850 }
5851 }
5852 return found;
5853 }
5854
5855 function moveInLine(line, pos, dir, byUnit) {
5856 if (!byUnit) return pos + dir;
5857 do pos += dir;
5858 while (pos > 0 && isExtendingChar(line.text.charAt(pos)));
5859 return pos;
5860 }
5861
5862 // This is somewhat involved. It is needed in order to move
5863 // 'visually' through bi-directional text -- i.e., pressing left
5864 // should make the cursor go left, even when in RTL text. The
5865 // tricky part is the 'jumps', where RTL and LTR text touch each
5866 // other. This often requires the cursor offset to move more than
5867 // one unit, in order to visually move one unit.
5868 function moveVisually(line, start, dir, byUnit) {
5869 var bidi = getOrder(line);
5870 if (!bidi) return moveLogically(line, start, dir, byUnit);
5871 var pos = getBidiPartAt(bidi, start), part = bidi[pos];
5872 var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit);
5873
5874 for (;;) {
5875 if (target > part.from && target < part.to) return target;
5876 if (target == part.from || target == part.to) {
5877 if (getBidiPartAt(bidi, target) == pos) return target;
5878 part = bidi[pos += dir];
5879 return (dir > 0) == part.level % 2 ? part.to : part.from;
5880 } else {
5881 part = bidi[pos += dir];
5882 if (!part) return null;
5883 if ((dir > 0) == part.level % 2)
5884 target = moveInLine(line, part.to, -1, byUnit);
5885 else
5886 target = moveInLine(line, part.from, 1, byUnit);
5887 }
5888 }
5889 }
5890
5891 function moveLogically(line, start, dir, byUnit) {
5892 var target = start + dir;
5893 if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir;
5894 return target < 0 || target > line.text.length ? null : target;
5895 }
5896
5897 // Bidirectional ordering algorithm
5898 // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
5899 // that this (partially) implements.
5900
5901 // One-char codes used for character types:
5902 // L (L): Left-to-Right
5903 // R (R): Right-to-Left
5904 // r (AL): Right-to-Left Arabic
5905 // 1 (EN): European Number
5906 // + (ES): European Number Separator
5907 // % (ET): European Number Terminator
5908 // n (AN): Arabic Number
5909 // , (CS): Common Number Separator
5910 // m (NSM): Non-Spacing Mark
5911 // b (BN): Boundary Neutral
5912 // s (B): Paragraph Separator
5913 // t (S): Segment Separator
5914 // w (WS): Whitespace
5915 // N (ON): Other Neutrals
5916
5917 // Returns null if characters are ordered as they appear
5918 // (left-to-right), or an array of sections ({from, to, level}
5919 // objects) in the order in which they occur visually.
5920 var bidiOrdering = (function() {
5921 // Character types for codepoints 0 to 0xff
5922 var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL";
5923 // Character types for codepoints 0x600 to 0x6ff
5924 var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr";
5925 function charType(code) {
5926 if (code <= 0xff) return lowTypes.charAt(code);
5927 else if (0x590 <= code && code <= 0x5f4) return "R";
5928 else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600);
5929 else if (0x700 <= code && code <= 0x8ac) return "r";
5930 else return "L";
5931 }
5932
5933 var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
5934 var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
5935 // Browsers seem to always treat the boundaries of block elements as being L.
5936 var outerType = "L";
5937
5938 return function(str) {
5939 if (!bidiRE.test(str)) return false;
5940 var len = str.length, types = [];
5941 for (var i = 0, type; i < len; ++i)
5942 types.push(type = charType(str.charCodeAt(i)));
5943
5944 // W1. Examine each non-spacing mark (NSM) in the level run, and
5945 // change the type of the NSM to the type of the previous
5946 // character. If the NSM is at the start of the level run, it will
5947 // get the type of sor.
5948 for (var i = 0, prev = outerType; i < len; ++i) {
5949 var type = types[i];
5950 if (type == "m") types[i] = prev;
5951 else prev = type;
5952 }
5953
5954 // W2. Search backwards from each instance of a European number
5955 // until the first strong type (R, L, AL, or sor) is found. If an
5956 // AL is found, change the type of the European number to Arabic
5957 // number.
5958 // W3. Change all ALs to R.
5959 for (var i = 0, cur = outerType; i < len; ++i) {
5960 var type = types[i];
5961 if (type == "1" && cur == "r") types[i] = "n";
5962 else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
5963 }
5964
5965 // W4. A single European separator between two European numbers
5966 // changes to a European number. A single common separator between
5967 // two numbers of the same type changes to that type.
5968 for (var i = 1, prev = types[0]; i < len - 1; ++i) {
5969 var type = types[i];
5970 if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
5971 else if (type == "," && prev == types[i+1] &&
5972 (prev == "1" || prev == "n")) types[i] = prev;
5973 prev = type;
5974 }
5975
5976 // W5. A sequence of European terminators adjacent to European
5977 // numbers changes to all European numbers.
5978 // W6. Otherwise, separators and terminators change to Other
5979 // Neutral.
5980 for (var i = 0; i < len; ++i) {
5981 var type = types[i];
5982 if (type == ",") types[i] = "N";
5983 else if (type == "%") {
5984 for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
5985 var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N";
5986 for (var j = i; j < end; ++j) types[j] = replace;
5987 i = end - 1;
5988 }
5989 }
5990
5991 // W7. Search backwards from each instance of a European number
5992 // until the first strong type (R, L, or sor) is found. If an L is
5993 // found, then change the type of the European number to L.
5994 for (var i = 0, cur = outerType; i < len; ++i) {
5995 var type = types[i];
5996 if (cur == "L" && type == "1") types[i] = "L";
5997 else if (isStrong.test(type)) cur = type;
5998 }
5999
6000 // N1. A sequence of neutrals takes the direction of the
6001 // surrounding strong text if the text on both sides has the same
6002 // direction. European and Arabic numbers act as if they were R in
6003 // terms of their influence on neutrals. Start-of-level-run (sor)
6004 // and end-of-level-run (eor) are used at level run boundaries.
6005 // N2. Any remaining neutrals take the embedding direction.
6006 for (var i = 0; i < len; ++i) {
6007 if (isNeutral.test(types[i])) {
6008 for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
6009 var before = (i ? types[i-1] : outerType) == "L";
6010 var after = (end < len ? types[end] : outerType) == "L";
6011 var replace = before || after ? "L" : "R";
6012 for (var j = i; j < end; ++j) types[j] = replace;
6013 i = end - 1;
6014 }
6015 }
6016
6017 // Here we depart from the documented algorithm, in order to avoid
6018 // building up an actual levels array. Since there are only three
6019 // levels (0, 1, 2) in an implementation that doesn't take
6020 // explicit embedding into account, we can build up the order on
6021 // the fly, without following the level-based algorithm.
6022 var order = [], m;
6023 for (var i = 0; i < len;) {
6024 if (countsAsLeft.test(types[i])) {
6025 var start = i;
6026 for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
6027 order.push({from: start, to: i, level: 0});
6028 } else {
6029 var pos = i, at = order.length;
6030 for (++i; i < len && types[i] != "L"; ++i) {}
6031 for (var j = pos; j < i;) {
6032 if (countsAsNum.test(types[j])) {
6033 if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1});
6034 var nstart = j;
6035 for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
6036 order.splice(at, 0, {from: nstart, to: j, level: 2});
6037 pos = j;
6038 } else ++j;
6039 }
6040 if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1});
6041 }
6042 }
6043 if (order[0].level == 1 && (m = str.match(/^\s+/))) {
6044 order[0].from = m[0].length;
6045 order.unshift({from: 0, to: m[0].length, level: 0});
6046 }
6047 if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
6048 lst(order).to -= m[0].length;
6049 order.push({from: len - m[0].length, to: len, level: 0});
6050 }
6051 if (order[0].level != lst(order).level)
6052 order.push({from: len, to: len, level: order[0].level});
6053
6054 return order;
6055 };
6056 })();
6057
6058 // THE END
6059
6060 CodeMirror.version = "3.21.1";
6061
6062 return CodeMirror;
6063 })();
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