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| 1 // This is CodeMirror (http://codemirror.net), a code editor |
| 2 // implemented in JavaScript on top of the browser's DOM. |
| 3 // |
| 4 // You can find some technical background for some of the code below |
| 5 // at http://marijnhaverbeke.nl/blog/#cm-internals . |
| 6 |
| 7 (function(mod) { |
| 8 if (typeof exports == "object" && typeof module == "object") // CommonJS |
| 9 module.exports = mod(); |
| 10 else if (typeof define == "function" && define.amd) // AMD |
| 11 return define([], mod); |
| 12 else // Plain browser env |
| 13 this.CodeMirror = mod(); |
| 14 })(function() { |
| 15 "use strict"; |
| 16 |
| 17 // BROWSER SNIFFING |
| 18 |
| 19 // Kludges for bugs and behavior differences that can't be feature |
| 20 // detected are enabled based on userAgent etc sniffing. |
| 21 |
| 22 var gecko = /gecko\/\d/i.test(navigator.userAgent); |
| 23 // ie_uptoN means Internet Explorer version N or lower |
| 24 var ie_upto10 = /MSIE \d/.test(navigator.userAgent); |
| 25 var ie_upto7 = ie_upto10 && (document.documentMode == null || document.documen
tMode < 8); |
| 26 var ie_upto8 = ie_upto10 && (document.documentMode == null || document.documen
tMode < 9); |
| 27 var ie_upto9 = ie_upto10 && (document.documentMode == null || document.documen
tMode < 10); |
| 28 var ie_11up = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent); |
| 29 var ie = ie_upto10 || ie_11up; |
| 30 var webkit = /WebKit\//.test(navigator.userAgent); |
| 31 var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent); |
| 32 var chrome = /Chrome\//.test(navigator.userAgent); |
| 33 var presto = /Opera\//.test(navigator.userAgent); |
| 34 var safari = /Apple Computer/.test(navigator.vendor); |
| 35 var khtml = /KHTML\//.test(navigator.userAgent); |
| 36 var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAge
nt); |
| 37 var phantom = /PhantomJS/.test(navigator.userAgent); |
| 38 |
| 39 var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(naviga
tor.userAgent); |
| 40 // This is woefully incomplete. Suggestions for alternative methods welcome. |
| 41 var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i
.test(navigator.userAgent); |
| 42 var mac = ios || /Mac/.test(navigator.platform); |
| 43 var windows = /win/i.test(navigator.platform); |
| 44 |
| 45 var presto_version = presto && navigator.userAgent.match(/Version\/(\d*\.\d*)/
); |
| 46 if (presto_version) presto_version = Number(presto_version[1]); |
| 47 if (presto_version && presto_version >= 15) { presto = false; webkit = true; } |
| 48 // Some browsers use the wrong event properties to signal cmd/ctrl on OS X |
| 49 var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || pre
sto_version < 12.11)); |
| 50 var captureRightClick = gecko || (ie && !ie_upto8); |
| 51 |
| 52 // Optimize some code when these features are not used. |
| 53 var sawReadOnlySpans = false, sawCollapsedSpans = false; |
| 54 |
| 55 // EDITOR CONSTRUCTOR |
| 56 |
| 57 // A CodeMirror instance represents an editor. This is the object |
| 58 // that user code is usually dealing with. |
| 59 |
| 60 function CodeMirror(place, options) { |
| 61 if (!(this instanceof CodeMirror)) return new CodeMirror(place, options); |
| 62 |
| 63 this.options = options = options || {}; |
| 64 // Determine effective options based on given values and defaults. |
| 65 copyObj(defaults, options, false); |
| 66 setGuttersForLineNumbers(options); |
| 67 |
| 68 var doc = options.value; |
| 69 if (typeof doc == "string") doc = new Doc(doc, options.mode); |
| 70 this.doc = doc; |
| 71 |
| 72 var display = this.display = new Display(place, doc); |
| 73 display.wrapper.CodeMirror = this; |
| 74 updateGutters(this); |
| 75 themeChanged(this); |
| 76 if (options.lineWrapping) |
| 77 this.display.wrapper.className += " CodeMirror-wrap"; |
| 78 if (options.autofocus && !mobile) focusInput(this); |
| 79 |
| 80 this.state = { |
| 81 keyMaps: [], // stores maps added by addKeyMap |
| 82 overlays: [], // highlighting overlays, as added by addOverlay |
| 83 modeGen: 0, // bumped when mode/overlay changes, used to invalidate high
lighting info |
| 84 overwrite: false, focused: false, |
| 85 suppressEdits: false, // used to disable editing during key handlers when
in readOnly mode |
| 86 pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edit
s in readInput |
| 87 draggingText: false, |
| 88 highlight: new Delayed() // stores highlight worker timeout |
| 89 }; |
| 90 |
| 91 // Override magic textarea content restore that IE sometimes does |
| 92 // on our hidden textarea on reload |
| 93 if (ie_upto10) setTimeout(bind(resetInput, this, true), 20); |
| 94 |
| 95 registerEventHandlers(this); |
| 96 |
| 97 var cm = this; |
| 98 runInOp(this, function() { |
| 99 cm.curOp.forceUpdate = true; |
| 100 attachDoc(cm, doc); |
| 101 |
| 102 if ((options.autofocus && !mobile) || activeElt() == display.input) |
| 103 setTimeout(bind(onFocus, cm), 20); |
| 104 else |
| 105 onBlur(cm); |
| 106 |
| 107 for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt)) |
| 108 optionHandlers[opt](cm, options[opt], Init); |
| 109 for (var i = 0; i < initHooks.length; ++i) initHooks[i](cm); |
| 110 }); |
| 111 } |
| 112 |
| 113 // DISPLAY CONSTRUCTOR |
| 114 |
| 115 // The display handles the DOM integration, both for input reading |
| 116 // and content drawing. It holds references to DOM nodes and |
| 117 // display-related state. |
| 118 |
| 119 function Display(place, doc) { |
| 120 var d = this; |
| 121 |
| 122 // The semihidden textarea that is focused when the editor is |
| 123 // focused, and receives input. |
| 124 var input = d.input = elt("textarea", null, null, "position: absolute; paddi
ng: 0; width: 1px; height: 1em; outline: none"); |
| 125 // The textarea is kept positioned near the cursor to prevent the |
| 126 // fact that it'll be scrolled into view on input from scrolling |
| 127 // our fake cursor out of view. On webkit, when wrap=off, paste is |
| 128 // very slow. So make the area wide instead. |
| 129 if (webkit) input.style.width = "1000px"; |
| 130 else input.setAttribute("wrap", "off"); |
| 131 // If border: 0; -- iOS fails to open keyboard (issue #1287) |
| 132 if (ios) input.style.border = "1px solid black"; |
| 133 input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize
", "off"); input.setAttribute("spellcheck", "false"); |
| 134 |
| 135 // Wraps and hides input textarea |
| 136 d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative
; width: 3px; height: 0px;"); |
| 137 // The fake scrollbar elements. |
| 138 d.scrollbarH = elt("div", [elt("div", null, null, "height: 100%; min-height:
1px")], "CodeMirror-hscrollbar"); |
| 139 d.scrollbarV = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeM
irror-vscrollbar"); |
| 140 // Covers bottom-right square when both scrollbars are present. |
| 141 d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler"); |
| 142 // Covers bottom of gutter when coverGutterNextToScrollbar is on |
| 143 // and h scrollbar is present. |
| 144 d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler"); |
| 145 // Will contain the actual code, positioned to cover the viewport. |
| 146 d.lineDiv = elt("div", null, "CodeMirror-code"); |
| 147 // Elements are added to these to represent selection and cursors. |
| 148 d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1"); |
| 149 d.cursorDiv = elt("div", null, "CodeMirror-cursors"); |
| 150 // A visibility: hidden element used to find the size of things. |
| 151 d.measure = elt("div", null, "CodeMirror-measure"); |
| 152 // When lines outside of the viewport are measured, they are drawn in this. |
| 153 d.lineMeasure = elt("div", null, "CodeMirror-measure"); |
| 154 // Wraps everything that needs to exist inside the vertically-padded coordin
ate system |
| 155 d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursor
Div, d.lineDiv], |
| 156 null, "position: relative; outline: none"); |
| 157 // Moved around its parent to cover visible view. |
| 158 d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null,
"position: relative"); |
| 159 // Set to the height of the document, allowing scrolling. |
| 160 d.sizer = elt("div", [d.mover], "CodeMirror-sizer"); |
| 161 // Behavior of elts with overflow: auto and padding is |
| 162 // inconsistent across browsers. This is used to ensure the |
| 163 // scrollable area is big enough. |
| 164 d.heightForcer = elt("div", null, null, "position: absolute; height: " + scr
ollerCutOff + "px; width: 1px;"); |
| 165 // Will contain the gutters, if any. |
| 166 d.gutters = elt("div", null, "CodeMirror-gutters"); |
| 167 d.lineGutter = null; |
| 168 // Actual scrollable element. |
| 169 d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-sc
roll"); |
| 170 d.scroller.setAttribute("tabIndex", "-1"); |
| 171 // The element in which the editor lives. |
| 172 d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV, |
| 173 d.scrollbarFiller, d.gutterFiller, d.scroller], "Cod
eMirror"); |
| 174 |
| 175 // Work around IE7 z-index bug (not perfect, hence IE7 not really being supp
orted) |
| 176 if (ie_upto7) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight =
0; } |
| 177 // Needed to hide big blue blinking cursor on Mobile Safari |
| 178 if (ios) input.style.width = "0px"; |
| 179 if (!webkit) d.scroller.draggable = true; |
| 180 // Needed to handle Tab key in KHTML |
| 181 if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "a
bsolute"; } |
| 182 // Need to set a minimum width to see the scrollbar on IE7 (but must not set
it on IE8). |
| 183 if (ie_upto7) d.scrollbarH.style.minHeight = d.scrollbarV.style.minWidth = "
18px"; |
| 184 |
| 185 if (place.appendChild) place.appendChild(d.wrapper); |
| 186 else place(d.wrapper); |
| 187 |
| 188 // Current rendered range (may be bigger than the view window). |
| 189 d.viewFrom = d.viewTo = doc.first; |
| 190 // Information about the rendered lines. |
| 191 d.view = []; |
| 192 // Holds info about a single rendered line when it was rendered |
| 193 // for measurement, while not in view. |
| 194 d.externalMeasured = null; |
| 195 // Empty space (in pixels) above the view |
| 196 d.viewOffset = 0; |
| 197 d.lastSizeC = 0; |
| 198 d.updateLineNumbers = null; |
| 199 |
| 200 // Used to only resize the line number gutter when necessary (when |
| 201 // the amount of lines crosses a boundary that makes its width change) |
| 202 d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null; |
| 203 // See readInput and resetInput |
| 204 d.prevInput = ""; |
| 205 // Set to true when a non-horizontal-scrolling line widget is |
| 206 // added. As an optimization, line widget aligning is skipped when |
| 207 // this is false. |
| 208 d.alignWidgets = false; |
| 209 // Flag that indicates whether we expect input to appear real soon |
| 210 // now (after some event like 'keypress' or 'input') and are |
| 211 // polling intensively. |
| 212 d.pollingFast = false; |
| 213 // Self-resetting timeout for the poller |
| 214 d.poll = new Delayed(); |
| 215 |
| 216 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null; |
| 217 |
| 218 // Tracks when resetInput has punted to just putting a short |
| 219 // string into the textarea instead of the full selection. |
| 220 d.inaccurateSelection = false; |
| 221 |
| 222 // Tracks the maximum line length so that the horizontal scrollbar |
| 223 // can be kept static when scrolling. |
| 224 d.maxLine = null; |
| 225 d.maxLineLength = 0; |
| 226 d.maxLineChanged = false; |
| 227 |
| 228 // Used for measuring wheel scrolling granularity |
| 229 d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null; |
| 230 |
| 231 // True when shift is held down. |
| 232 d.shift = false; |
| 233 } |
| 234 |
| 235 // STATE UPDATES |
| 236 |
| 237 // Used to get the editor into a consistent state again when options change. |
| 238 |
| 239 function loadMode(cm) { |
| 240 cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption); |
| 241 resetModeState(cm); |
| 242 } |
| 243 |
| 244 function resetModeState(cm) { |
| 245 cm.doc.iter(function(line) { |
| 246 if (line.stateAfter) line.stateAfter = null; |
| 247 if (line.styles) line.styles = null; |
| 248 }); |
| 249 cm.doc.frontier = cm.doc.first; |
| 250 startWorker(cm, 100); |
| 251 cm.state.modeGen++; |
| 252 if (cm.curOp) regChange(cm); |
| 253 } |
| 254 |
| 255 function wrappingChanged(cm) { |
| 256 if (cm.options.lineWrapping) { |
| 257 addClass(cm.display.wrapper, "CodeMirror-wrap"); |
| 258 cm.display.sizer.style.minWidth = ""; |
| 259 } else { |
| 260 rmClass(cm.display.wrapper, "CodeMirror-wrap"); |
| 261 findMaxLine(cm); |
| 262 } |
| 263 estimateLineHeights(cm); |
| 264 regChange(cm); |
| 265 clearCaches(cm); |
| 266 setTimeout(function(){updateScrollbars(cm);}, 100); |
| 267 } |
| 268 |
| 269 // Returns a function that estimates the height of a line, to use as |
| 270 // first approximation until the line becomes visible (and is thus |
| 271 // properly measurable). |
| 272 function estimateHeight(cm) { |
| 273 var th = textHeight(cm.display), wrapping = cm.options.lineWrapping; |
| 274 var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / char
Width(cm.display) - 3); |
| 275 return function(line) { |
| 276 if (lineIsHidden(cm.doc, line)) return 0; |
| 277 |
| 278 var widgetsHeight = 0; |
| 279 if (line.widgets) for (var i = 0; i < line.widgets.length; i++) { |
| 280 if (line.widgets[i].height) widgetsHeight += line.widgets[i].height; |
| 281 } |
| 282 |
| 283 if (wrapping) |
| 284 return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th
; |
| 285 else |
| 286 return widgetsHeight + th; |
| 287 }; |
| 288 } |
| 289 |
| 290 function estimateLineHeights(cm) { |
| 291 var doc = cm.doc, est = estimateHeight(cm); |
| 292 doc.iter(function(line) { |
| 293 var estHeight = est(line); |
| 294 if (estHeight != line.height) updateLineHeight(line, estHeight); |
| 295 }); |
| 296 } |
| 297 |
| 298 function keyMapChanged(cm) { |
| 299 var map = keyMap[cm.options.keyMap], style = map.style; |
| 300 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-k
eymap-\S+/g, "") + |
| 301 (style ? " cm-keymap-" + style : ""); |
| 302 } |
| 303 |
| 304 function themeChanged(cm) { |
| 305 cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s
-\S+/g, "") + |
| 306 cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-"); |
| 307 clearCaches(cm); |
| 308 } |
| 309 |
| 310 function guttersChanged(cm) { |
| 311 updateGutters(cm); |
| 312 regChange(cm); |
| 313 setTimeout(function(){alignHorizontally(cm);}, 20); |
| 314 } |
| 315 |
| 316 // Rebuild the gutter elements, ensure the margin to the left of the |
| 317 // code matches their width. |
| 318 function updateGutters(cm) { |
| 319 var gutters = cm.display.gutters, specs = cm.options.gutters; |
| 320 removeChildren(gutters); |
| 321 for (var i = 0; i < specs.length; ++i) { |
| 322 var gutterClass = specs[i]; |
| 323 var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gut
terClass)); |
| 324 if (gutterClass == "CodeMirror-linenumbers") { |
| 325 cm.display.lineGutter = gElt; |
| 326 gElt.style.width = (cm.display.lineNumWidth || 1) + "px"; |
| 327 } |
| 328 } |
| 329 gutters.style.display = i ? "" : "none"; |
| 330 updateGutterSpace(cm); |
| 331 } |
| 332 |
| 333 function updateGutterSpace(cm) { |
| 334 var width = cm.display.gutters.offsetWidth; |
| 335 cm.display.sizer.style.marginLeft = width + "px"; |
| 336 cm.display.scrollbarH.style.left = cm.options.fixedGutter ? width + "px" : 0
; |
| 337 } |
| 338 |
| 339 // Compute the character length of a line, taking into account |
| 340 // collapsed ranges (see markText) that might hide parts, and join |
| 341 // other lines onto it. |
| 342 function lineLength(line) { |
| 343 if (line.height == 0) return 0; |
| 344 var len = line.text.length, merged, cur = line; |
| 345 while (merged = collapsedSpanAtStart(cur)) { |
| 346 var found = merged.find(0, true); |
| 347 cur = found.from.line; |
| 348 len += found.from.ch - found.to.ch; |
| 349 } |
| 350 cur = line; |
| 351 while (merged = collapsedSpanAtEnd(cur)) { |
| 352 var found = merged.find(0, true); |
| 353 len -= cur.text.length - found.from.ch; |
| 354 cur = found.to.line; |
| 355 len += cur.text.length - found.to.ch; |
| 356 } |
| 357 return len; |
| 358 } |
| 359 |
| 360 // Find the longest line in the document. |
| 361 function findMaxLine(cm) { |
| 362 var d = cm.display, doc = cm.doc; |
| 363 d.maxLine = getLine(doc, doc.first); |
| 364 d.maxLineLength = lineLength(d.maxLine); |
| 365 d.maxLineChanged = true; |
| 366 doc.iter(function(line) { |
| 367 var len = lineLength(line); |
| 368 if (len > d.maxLineLength) { |
| 369 d.maxLineLength = len; |
| 370 d.maxLine = line; |
| 371 } |
| 372 }); |
| 373 } |
| 374 |
| 375 // Make sure the gutters options contains the element |
| 376 // "CodeMirror-linenumbers" when the lineNumbers option is true. |
| 377 function setGuttersForLineNumbers(options) { |
| 378 var found = indexOf(options.gutters, "CodeMirror-linenumbers"); |
| 379 if (found == -1 && options.lineNumbers) { |
| 380 options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]); |
| 381 } else if (found > -1 && !options.lineNumbers) { |
| 382 options.gutters = options.gutters.slice(0); |
| 383 options.gutters.splice(found, 1); |
| 384 } |
| 385 } |
| 386 |
| 387 // SCROLLBARS |
| 388 |
| 389 // Prepare DOM reads needed to update the scrollbars. Done in one |
| 390 // shot to minimize update/measure roundtrips. |
| 391 function measureForScrollbars(cm) { |
| 392 var scroll = cm.display.scroller; |
| 393 return { |
| 394 clientHeight: scroll.clientHeight, |
| 395 barHeight: cm.display.scrollbarV.clientHeight, |
| 396 scrollWidth: scroll.scrollWidth, clientWidth: scroll.clientWidth, |
| 397 barWidth: cm.display.scrollbarH.clientWidth, |
| 398 docHeight: Math.round(cm.doc.height + paddingVert(cm.display)) |
| 399 }; |
| 400 } |
| 401 |
| 402 // Re-synchronize the fake scrollbars with the actual size of the |
| 403 // content. |
| 404 function updateScrollbars(cm, measure) { |
| 405 if (!measure) measure = measureForScrollbars(cm); |
| 406 var d = cm.display; |
| 407 var scrollHeight = measure.docHeight + scrollerCutOff; |
| 408 var needsH = measure.scrollWidth > measure.clientWidth; |
| 409 var needsV = scrollHeight > measure.clientHeight; |
| 410 if (needsV) { |
| 411 d.scrollbarV.style.display = "block"; |
| 412 d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0
"; |
| 413 // A bug in IE8 can cause this value to be negative, so guard it. |
| 414 d.scrollbarV.firstChild.style.height = |
| 415 Math.max(0, scrollHeight - measure.clientHeight + (measure.barHeight ||
d.scrollbarV.clientHeight)) + "px"; |
| 416 } else { |
| 417 d.scrollbarV.style.display = ""; |
| 418 d.scrollbarV.firstChild.style.height = "0"; |
| 419 } |
| 420 if (needsH) { |
| 421 d.scrollbarH.style.display = "block"; |
| 422 d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0"
; |
| 423 d.scrollbarH.firstChild.style.width = |
| 424 (measure.scrollWidth - measure.clientWidth + (measure.barWidth || d.scro
llbarH.clientWidth)) + "px"; |
| 425 } else { |
| 426 d.scrollbarH.style.display = ""; |
| 427 d.scrollbarH.firstChild.style.width = "0"; |
| 428 } |
| 429 if (needsH && needsV) { |
| 430 d.scrollbarFiller.style.display = "block"; |
| 431 d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbar
Width(d.measure) + "px"; |
| 432 } else d.scrollbarFiller.style.display = ""; |
| 433 if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutte
r) { |
| 434 d.gutterFiller.style.display = "block"; |
| 435 d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px"; |
| 436 d.gutterFiller.style.width = d.gutters.offsetWidth + "px"; |
| 437 } else d.gutterFiller.style.display = ""; |
| 438 |
| 439 if (!cm.state.checkedOverlayScrollbar && measure.clientHeight > 0) { |
| 440 if (scrollbarWidth(d.measure) === 0) { |
| 441 var w = mac && !mac_geMountainLion ? "12px" : "18px"; |
| 442 d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = w; |
| 443 var barMouseDown = function(e) { |
| 444 if (e_target(e) != d.scrollbarV && e_target(e) != d.scrollbarH) |
| 445 operation(cm, onMouseDown)(e); |
| 446 }; |
| 447 on(d.scrollbarV, "mousedown", barMouseDown); |
| 448 on(d.scrollbarH, "mousedown", barMouseDown); |
| 449 } |
| 450 cm.state.checkedOverlayScrollbar = true; |
| 451 } |
| 452 } |
| 453 |
| 454 // Compute the lines that are visible in a given viewport (defaults |
| 455 // the the current scroll position). viewPort may contain top, |
| 456 // height, and ensure (see op.scrollToPos) properties. |
| 457 function visibleLines(display, doc, viewPort) { |
| 458 var top = viewPort && viewPort.top != null ? viewPort.top : display.scroller
.scrollTop; |
| 459 top = Math.floor(top - paddingTop(display)); |
| 460 var bottom = viewPort && viewPort.bottom != null ? viewPort.bottom : top + d
isplay.wrapper.clientHeight; |
| 461 |
| 462 var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom); |
| 463 // Ensure is a {from: {line, ch}, to: {line, ch}} object, and |
| 464 // forces those lines into the viewport (if possible). |
| 465 if (viewPort && viewPort.ensure) { |
| 466 var ensureFrom = viewPort.ensure.from.line, ensureTo = viewPort.ensure.to.
line; |
| 467 if (ensureFrom < from) |
| 468 return {from: ensureFrom, |
| 469 to: lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + d
isplay.wrapper.clientHeight)}; |
| 470 if (Math.min(ensureTo, doc.lastLine()) >= to) |
| 471 return {from: lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - d
isplay.wrapper.clientHeight), |
| 472 to: ensureTo}; |
| 473 } |
| 474 return {from: from, to: to}; |
| 475 } |
| 476 |
| 477 // LINE NUMBERS |
| 478 |
| 479 // Re-align line numbers and gutter marks to compensate for |
| 480 // horizontal scrolling. |
| 481 function alignHorizontally(cm) { |
| 482 var display = cm.display, view = display.view; |
| 483 if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fix
edGutter)) return; |
| 484 var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.
doc.scrollLeft; |
| 485 var gutterW = display.gutters.offsetWidth, left = comp + "px"; |
| 486 for (var i = 0; i < view.length; i++) if (!view[i].hidden) { |
| 487 if (cm.options.fixedGutter && view[i].gutter) |
| 488 view[i].gutter.style.left = left; |
| 489 var align = view[i].alignable; |
| 490 if (align) for (var j = 0; j < align.length; j++) |
| 491 align[j].style.left = left; |
| 492 } |
| 493 if (cm.options.fixedGutter) |
| 494 display.gutters.style.left = (comp + gutterW) + "px"; |
| 495 } |
| 496 |
| 497 // Used to ensure that the line number gutter is still the right |
| 498 // size for the current document size. Returns true when an update |
| 499 // is needed. |
| 500 function maybeUpdateLineNumberWidth(cm) { |
| 501 if (!cm.options.lineNumbers) return false; |
| 502 var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1)
, display = cm.display; |
| 503 if (last.length != display.lineNumChars) { |
| 504 var test = display.measure.appendChild(elt("div", [elt("div", last)], |
| 505 "CodeMirror-linenumber CodeMirr
or-gutter-elt")); |
| 506 var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - inn
erW; |
| 507 display.lineGutter.style.width = ""; |
| 508 display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidt
h - padding); |
| 509 display.lineNumWidth = display.lineNumInnerWidth + padding; |
| 510 display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; |
| 511 display.lineGutter.style.width = display.lineNumWidth + "px"; |
| 512 updateGutterSpace(cm); |
| 513 return true; |
| 514 } |
| 515 return false; |
| 516 } |
| 517 |
| 518 function lineNumberFor(options, i) { |
| 519 return String(options.lineNumberFormatter(i + options.firstLineNumber)); |
| 520 } |
| 521 |
| 522 // Computes display.scroller.scrollLeft + display.gutters.offsetWidth, |
| 523 // but using getBoundingClientRect to get a sub-pixel-accurate |
| 524 // result. |
| 525 function compensateForHScroll(display) { |
| 526 return display.scroller.getBoundingClientRect().left - display.sizer.getBoun
dingClientRect().left; |
| 527 } |
| 528 |
| 529 // DISPLAY DRAWING |
| 530 |
| 531 // Updates the display, selection, and scrollbars, using the |
| 532 // information in display.view to find out which nodes are no longer |
| 533 // up-to-date. Tries to bail out early when no changes are needed, |
| 534 // unless forced is true. |
| 535 // Returns true if an actual update happened, false otherwise. |
| 536 function updateDisplay(cm, viewPort, forced) { |
| 537 var oldFrom = cm.display.viewFrom, oldTo = cm.display.viewTo, updated; |
| 538 var visible = visibleLines(cm.display, cm.doc, viewPort); |
| 539 for (var first = true;; first = false) { |
| 540 var oldWidth = cm.display.scroller.clientWidth; |
| 541 if (!updateDisplayInner(cm, visible, forced)) break; |
| 542 updated = true; |
| 543 |
| 544 // If the max line changed since it was last measured, measure it, |
| 545 // and ensure the document's width matches it. |
| 546 if (cm.display.maxLineChanged && !cm.options.lineWrapping) |
| 547 adjustContentWidth(cm); |
| 548 |
| 549 var barMeasure = measureForScrollbars(cm); |
| 550 updateSelection(cm); |
| 551 setDocumentHeight(cm, barMeasure); |
| 552 updateScrollbars(cm, barMeasure); |
| 553 if (webkit && cm.options.lineWrapping) |
| 554 checkForWebkitWidthBug(cm, barMeasure); // (Issue #2420) |
| 555 if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.cl
ientWidth) { |
| 556 forced = true; |
| 557 continue; |
| 558 } |
| 559 forced = false; |
| 560 |
| 561 // Clip forced viewport to actual scrollable area. |
| 562 if (viewPort && viewPort.top != null) |
| 563 viewPort = {top: Math.min(barMeasure.docHeight - scrollerCutOff - barMea
sure.clientHeight, viewPort.top)}; |
| 564 // Updated line heights might result in the drawn area not |
| 565 // actually covering the viewport. Keep looping until it does. |
| 566 visible = visibleLines(cm.display, cm.doc, viewPort); |
| 567 if (visible.from >= cm.display.viewFrom && visible.to <= cm.display.viewTo
) |
| 568 break; |
| 569 } |
| 570 |
| 571 cm.display.updateLineNumbers = null; |
| 572 if (updated) { |
| 573 signalLater(cm, "update", cm); |
| 574 if (cm.display.viewFrom != oldFrom || cm.display.viewTo != oldTo) |
| 575 signalLater(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.vi
ewTo); |
| 576 } |
| 577 return updated; |
| 578 } |
| 579 |
| 580 // Does the actual updating of the line display. Bails out |
| 581 // (returning false) when there is nothing to be done and forced is |
| 582 // false. |
| 583 function updateDisplayInner(cm, visible, forced) { |
| 584 var display = cm.display, doc = cm.doc; |
| 585 if (!display.wrapper.offsetWidth) { |
| 586 resetView(cm); |
| 587 return; |
| 588 } |
| 589 |
| 590 // Bail out if the visible area is already rendered and nothing changed. |
| 591 if (!forced && visible.from >= display.viewFrom && visible.to <= display.vie
wTo && |
| 592 countDirtyView(cm) == 0) |
| 593 return; |
| 594 |
| 595 if (maybeUpdateLineNumberWidth(cm)) |
| 596 resetView(cm); |
| 597 var dims = getDimensions(cm); |
| 598 |
| 599 // Compute a suitable new viewport (from & to) |
| 600 var end = doc.first + doc.size; |
| 601 var from = Math.max(visible.from - cm.options.viewportMargin, doc.first); |
| 602 var to = Math.min(end, visible.to + cm.options.viewportMargin); |
| 603 if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max
(doc.first, display.viewFrom); |
| 604 if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, disp
lay.viewTo); |
| 605 if (sawCollapsedSpans) { |
| 606 from = visualLineNo(cm.doc, from); |
| 607 to = visualLineEndNo(cm.doc, to); |
| 608 } |
| 609 |
| 610 var different = from != display.viewFrom || to != display.viewTo || |
| 611 display.lastSizeC != display.wrapper.clientHeight; |
| 612 adjustView(cm, from, to); |
| 613 |
| 614 display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom)); |
| 615 // Position the mover div to align with the current scroll position |
| 616 cm.display.mover.style.top = display.viewOffset + "px"; |
| 617 |
| 618 var toUpdate = countDirtyView(cm); |
| 619 if (!different && toUpdate == 0 && !forced) return; |
| 620 |
| 621 // For big changes, we hide the enclosing element during the |
| 622 // update, since that speeds up the operations on most browsers. |
| 623 var focused = activeElt(); |
| 624 if (toUpdate > 4) display.lineDiv.style.display = "none"; |
| 625 patchDisplay(cm, display.updateLineNumbers, dims); |
| 626 if (toUpdate > 4) display.lineDiv.style.display = ""; |
| 627 // There might have been a widget with a focused element that got |
| 628 // hidden or updated, if so re-focus it. |
| 629 if (focused && activeElt() != focused && focused.offsetHeight) focused.focus
(); |
| 630 |
| 631 // Prevent selection and cursors from interfering with the scroll |
| 632 // width. |
| 633 removeChildren(display.cursorDiv); |
| 634 removeChildren(display.selectionDiv); |
| 635 |
| 636 if (different) { |
| 637 display.lastSizeC = display.wrapper.clientHeight; |
| 638 startWorker(cm, 400); |
| 639 } |
| 640 |
| 641 updateHeightsInViewport(cm); |
| 642 |
| 643 return true; |
| 644 } |
| 645 |
| 646 function adjustContentWidth(cm) { |
| 647 var display = cm.display; |
| 648 var width = measureChar(cm, display.maxLine, display.maxLine.text.length).le
ft; |
| 649 display.maxLineChanged = false; |
| 650 var minWidth = Math.max(0, width + 3); |
| 651 var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + minWidth + scroll
erCutOff - display.scroller.clientWidth); |
| 652 display.sizer.style.minWidth = minWidth + "px"; |
| 653 if (maxScrollLeft < cm.doc.scrollLeft) |
| 654 setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), tr
ue); |
| 655 } |
| 656 |
| 657 function setDocumentHeight(cm, measure) { |
| 658 cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = measu
re.docHeight + "px"; |
| 659 cm.display.gutters.style.height = Math.max(measure.docHeight, measure.client
Height - scrollerCutOff) + "px"; |
| 660 } |
| 661 |
| 662 |
| 663 function checkForWebkitWidthBug(cm, measure) { |
| 664 // Work around Webkit bug where it sometimes reserves space for a |
| 665 // non-existing phantom scrollbar in the scroller (Issue #2420) |
| 666 if (cm.display.sizer.offsetWidth + cm.display.gutters.offsetWidth < cm.displ
ay.scroller.clientWidth - 1) { |
| 667 cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = "0p
x"; |
| 668 cm.display.gutters.style.height = measure.docHeight + "px"; |
| 669 } |
| 670 } |
| 671 |
| 672 // Read the actual heights of the rendered lines, and update their |
| 673 // stored heights to match. |
| 674 function updateHeightsInViewport(cm) { |
| 675 var display = cm.display; |
| 676 var prevBottom = display.lineDiv.offsetTop; |
| 677 for (var i = 0; i < display.view.length; i++) { |
| 678 var cur = display.view[i], height; |
| 679 if (cur.hidden) continue; |
| 680 if (ie_upto7) { |
| 681 var bot = cur.node.offsetTop + cur.node.offsetHeight; |
| 682 height = bot - prevBottom; |
| 683 prevBottom = bot; |
| 684 } else { |
| 685 var box = cur.node.getBoundingClientRect(); |
| 686 height = box.bottom - box.top; |
| 687 } |
| 688 var diff = cur.line.height - height; |
| 689 if (height < 2) height = textHeight(display); |
| 690 if (diff > .001 || diff < -.001) { |
| 691 updateLineHeight(cur.line, height); |
| 692 updateWidgetHeight(cur.line); |
| 693 if (cur.rest) for (var j = 0; j < cur.rest.length; j++) |
| 694 updateWidgetHeight(cur.rest[j]); |
| 695 } |
| 696 } |
| 697 } |
| 698 |
| 699 // Read and store the height of line widgets associated with the |
| 700 // given line. |
| 701 function updateWidgetHeight(line) { |
| 702 if (line.widgets) for (var i = 0; i < line.widgets.length; ++i) |
| 703 line.widgets[i].height = line.widgets[i].node.offsetHeight; |
| 704 } |
| 705 |
| 706 // Do a bulk-read of the DOM positions and sizes needed to draw the |
| 707 // view, so that we don't interleave reading and writing to the DOM. |
| 708 function getDimensions(cm) { |
| 709 var d = cm.display, left = {}, width = {}; |
| 710 for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) { |
| 711 left[cm.options.gutters[i]] = n.offsetLeft; |
| 712 width[cm.options.gutters[i]] = n.offsetWidth; |
| 713 } |
| 714 return {fixedPos: compensateForHScroll(d), |
| 715 gutterTotalWidth: d.gutters.offsetWidth, |
| 716 gutterLeft: left, |
| 717 gutterWidth: width, |
| 718 wrapperWidth: d.wrapper.clientWidth}; |
| 719 } |
| 720 |
| 721 // Sync the actual display DOM structure with display.view, removing |
| 722 // nodes for lines that are no longer in view, and creating the ones |
| 723 // that are not there yet, and updating the ones that are out of |
| 724 // date. |
| 725 function patchDisplay(cm, updateNumbersFrom, dims) { |
| 726 var display = cm.display, lineNumbers = cm.options.lineNumbers; |
| 727 var container = display.lineDiv, cur = container.firstChild; |
| 728 |
| 729 function rm(node) { |
| 730 var next = node.nextSibling; |
| 731 // Works around a throw-scroll bug in OS X Webkit |
| 732 if (webkit && mac && cm.display.currentWheelTarget == node) |
| 733 node.style.display = "none"; |
| 734 else |
| 735 node.parentNode.removeChild(node); |
| 736 return next; |
| 737 } |
| 738 |
| 739 var view = display.view, lineN = display.viewFrom; |
| 740 // Loop over the elements in the view, syncing cur (the DOM nodes |
| 741 // in display.lineDiv) with the view as we go. |
| 742 for (var i = 0; i < view.length; i++) { |
| 743 var lineView = view[i]; |
| 744 if (lineView.hidden) { |
| 745 } else if (!lineView.node) { // Not drawn yet |
| 746 var node = buildLineElement(cm, lineView, lineN, dims); |
| 747 container.insertBefore(node, cur); |
| 748 } else { // Already drawn |
| 749 while (cur != lineView.node) cur = rm(cur); |
| 750 var updateNumber = lineNumbers && updateNumbersFrom != null && |
| 751 updateNumbersFrom <= lineN && lineView.lineNumber; |
| 752 if (lineView.changes) { |
| 753 if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false; |
| 754 updateLineForChanges(cm, lineView, lineN, dims); |
| 755 } |
| 756 if (updateNumber) { |
| 757 removeChildren(lineView.lineNumber); |
| 758 lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(
cm.options, lineN))); |
| 759 } |
| 760 cur = lineView.node.nextSibling; |
| 761 } |
| 762 lineN += lineView.size; |
| 763 } |
| 764 while (cur) cur = rm(cur); |
| 765 } |
| 766 |
| 767 // When an aspect of a line changes, a string is added to |
| 768 // lineView.changes. This updates the relevant part of the line's |
| 769 // DOM structure. |
| 770 function updateLineForChanges(cm, lineView, lineN, dims) { |
| 771 for (var j = 0; j < lineView.changes.length; j++) { |
| 772 var type = lineView.changes[j]; |
| 773 if (type == "text") updateLineText(cm, lineView); |
| 774 else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims); |
| 775 else if (type == "class") updateLineClasses(lineView); |
| 776 else if (type == "widget") updateLineWidgets(lineView, dims); |
| 777 } |
| 778 lineView.changes = null; |
| 779 } |
| 780 |
| 781 // Lines with gutter elements, widgets or a background class need to |
| 782 // be wrapped, and have the extra elements added to the wrapper div |
| 783 function ensureLineWrapped(lineView) { |
| 784 if (lineView.node == lineView.text) { |
| 785 lineView.node = elt("div", null, null, "position: relative"); |
| 786 if (lineView.text.parentNode) |
| 787 lineView.text.parentNode.replaceChild(lineView.node, lineView.text); |
| 788 lineView.node.appendChild(lineView.text); |
| 789 if (ie_upto7) lineView.node.style.zIndex = 2; |
| 790 } |
| 791 return lineView.node; |
| 792 } |
| 793 |
| 794 function updateLineBackground(lineView) { |
| 795 var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass
|| "") : lineView.line.bgClass; |
| 796 if (cls) cls += " CodeMirror-linebackground"; |
| 797 if (lineView.background) { |
| 798 if (cls) lineView.background.className = cls; |
| 799 else { lineView.background.parentNode.removeChild(lineView.background); li
neView.background = null; } |
| 800 } else if (cls) { |
| 801 var wrap = ensureLineWrapped(lineView); |
| 802 lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstC
hild); |
| 803 } |
| 804 } |
| 805 |
| 806 // Wrapper around buildLineContent which will reuse the structure |
| 807 // in display.externalMeasured when possible. |
| 808 function getLineContent(cm, lineView) { |
| 809 var ext = cm.display.externalMeasured; |
| 810 if (ext && ext.line == lineView.line) { |
| 811 cm.display.externalMeasured = null; |
| 812 lineView.measure = ext.measure; |
| 813 return ext.built; |
| 814 } |
| 815 return buildLineContent(cm, lineView); |
| 816 } |
| 817 |
| 818 // Redraw the line's text. Interacts with the background and text |
| 819 // classes because the mode may output tokens that influence these |
| 820 // classes. |
| 821 function updateLineText(cm, lineView) { |
| 822 var cls = lineView.text.className; |
| 823 var built = getLineContent(cm, lineView); |
| 824 if (lineView.text == lineView.node) lineView.node = built.pre; |
| 825 lineView.text.parentNode.replaceChild(built.pre, lineView.text); |
| 826 lineView.text = built.pre; |
| 827 if (built.bgClass != lineView.bgClass || built.textClass != lineView.textCla
ss) { |
| 828 lineView.bgClass = built.bgClass; |
| 829 lineView.textClass = built.textClass; |
| 830 updateLineClasses(lineView); |
| 831 } else if (cls) { |
| 832 lineView.text.className = cls; |
| 833 } |
| 834 } |
| 835 |
| 836 function updateLineClasses(lineView) { |
| 837 updateLineBackground(lineView); |
| 838 if (lineView.line.wrapClass) |
| 839 ensureLineWrapped(lineView).className = lineView.line.wrapClass; |
| 840 else if (lineView.node != lineView.text) |
| 841 lineView.node.className = ""; |
| 842 var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.li
ne.textClass || "") : lineView.line.textClass; |
| 843 lineView.text.className = textClass || ""; |
| 844 } |
| 845 |
| 846 function updateLineGutter(cm, lineView, lineN, dims) { |
| 847 if (lineView.gutter) { |
| 848 lineView.node.removeChild(lineView.gutter); |
| 849 lineView.gutter = null; |
| 850 } |
| 851 var markers = lineView.line.gutterMarkers; |
| 852 if (cm.options.lineNumbers || markers) { |
| 853 var wrap = ensureLineWrapped(lineView); |
| 854 var gutterWrap = lineView.gutter = |
| 855 wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "positio
n: absolute; left: " + |
| 856 (cm.options.fixedGutter ? dims.fixedPos : -dims.gu
tterTotalWidth) + "px"), |
| 857 lineView.text); |
| 858 if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumber
s"])) |
| 859 lineView.lineNumber = gutterWrap.appendChild( |
| 860 elt("div", lineNumberFor(cm.options, lineN), |
| 861 "CodeMirror-linenumber CodeMirror-gutter-elt", |
| 862 "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width:
" |
| 863 + cm.display.lineNumInnerWidth + "px")); |
| 864 if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) { |
| 865 var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && ma
rkers[id]; |
| 866 if (found) |
| 867 gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "l
eft: " + |
| 868 dims.gutterLeft[id] + "px; width: " + dims.
gutterWidth[id] + "px")); |
| 869 } |
| 870 } |
| 871 } |
| 872 |
| 873 function updateLineWidgets(lineView, dims) { |
| 874 if (lineView.alignable) lineView.alignable = null; |
| 875 for (var node = lineView.node.firstChild, next; node; node = next) { |
| 876 var next = node.nextSibling; |
| 877 if (node.className == "CodeMirror-linewidget") |
| 878 lineView.node.removeChild(node); |
| 879 } |
| 880 insertLineWidgets(lineView, dims); |
| 881 } |
| 882 |
| 883 // Build a line's DOM representation from scratch |
| 884 function buildLineElement(cm, lineView, lineN, dims) { |
| 885 var built = getLineContent(cm, lineView); |
| 886 lineView.text = lineView.node = built.pre; |
| 887 if (built.bgClass) lineView.bgClass = built.bgClass; |
| 888 if (built.textClass) lineView.textClass = built.textClass; |
| 889 |
| 890 updateLineClasses(lineView); |
| 891 updateLineGutter(cm, lineView, lineN, dims); |
| 892 insertLineWidgets(lineView, dims); |
| 893 return lineView.node; |
| 894 } |
| 895 |
| 896 // A lineView may contain multiple logical lines (when merged by |
| 897 // collapsed spans). The widgets for all of them need to be drawn. |
| 898 function insertLineWidgets(lineView, dims) { |
| 899 insertLineWidgetsFor(lineView.line, lineView, dims, true); |
| 900 if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) |
| 901 insertLineWidgetsFor(lineView.rest[i], lineView, dims, false); |
| 902 } |
| 903 |
| 904 function insertLineWidgetsFor(line, lineView, dims, allowAbove) { |
| 905 if (!line.widgets) return; |
| 906 var wrap = ensureLineWrapped(lineView); |
| 907 for (var i = 0, ws = line.widgets; i < ws.length; ++i) { |
| 908 var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidge
t"); |
| 909 if (!widget.handleMouseEvents) node.ignoreEvents = true; |
| 910 positionLineWidget(widget, node, lineView, dims); |
| 911 if (allowAbove && widget.above) |
| 912 wrap.insertBefore(node, lineView.gutter || lineView.text); |
| 913 else |
| 914 wrap.appendChild(node); |
| 915 signalLater(widget, "redraw"); |
| 916 } |
| 917 } |
| 918 |
| 919 function positionLineWidget(widget, node, lineView, dims) { |
| 920 if (widget.noHScroll) { |
| 921 (lineView.alignable || (lineView.alignable = [])).push(node); |
| 922 var width = dims.wrapperWidth; |
| 923 node.style.left = dims.fixedPos + "px"; |
| 924 if (!widget.coverGutter) { |
| 925 width -= dims.gutterTotalWidth; |
| 926 node.style.paddingLeft = dims.gutterTotalWidth + "px"; |
| 927 } |
| 928 node.style.width = width + "px"; |
| 929 } |
| 930 if (widget.coverGutter) { |
| 931 node.style.zIndex = 5; |
| 932 node.style.position = "relative"; |
| 933 if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "p
x"; |
| 934 } |
| 935 } |
| 936 |
| 937 // POSITION OBJECT |
| 938 |
| 939 // A Pos instance represents a position within the text. |
| 940 var Pos = CodeMirror.Pos = function(line, ch) { |
| 941 if (!(this instanceof Pos)) return new Pos(line, ch); |
| 942 this.line = line; this.ch = ch; |
| 943 }; |
| 944 |
| 945 // Compare two positions, return 0 if they are the same, a negative |
| 946 // number when a is less, and a positive number otherwise. |
| 947 var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch
- b.ch; }; |
| 948 |
| 949 function copyPos(x) {return Pos(x.line, x.ch);} |
| 950 function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; } |
| 951 function minPos(a, b) { return cmp(a, b) < 0 ? a : b; } |
| 952 |
| 953 // SELECTION / CURSOR |
| 954 |
| 955 // Selection objects are immutable. A new one is created every time |
| 956 // the selection changes. A selection is one or more non-overlapping |
| 957 // (and non-touching) ranges, sorted, and an integer that indicates |
| 958 // which one is the primary selection (the one that's scrolled into |
| 959 // view, that getCursor returns, etc). |
| 960 function Selection(ranges, primIndex) { |
| 961 this.ranges = ranges; |
| 962 this.primIndex = primIndex; |
| 963 } |
| 964 |
| 965 Selection.prototype = { |
| 966 primary: function() { return this.ranges[this.primIndex]; }, |
| 967 equals: function(other) { |
| 968 if (other == this) return true; |
| 969 if (other.primIndex != this.primIndex || other.ranges.length != this.range
s.length) return false; |
| 970 for (var i = 0; i < this.ranges.length; i++) { |
| 971 var here = this.ranges[i], there = other.ranges[i]; |
| 972 if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) !=
0) return false; |
| 973 } |
| 974 return true; |
| 975 }, |
| 976 deepCopy: function() { |
| 977 for (var out = [], i = 0; i < this.ranges.length; i++) |
| 978 out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i
].head)); |
| 979 return new Selection(out, this.primIndex); |
| 980 }, |
| 981 somethingSelected: function() { |
| 982 for (var i = 0; i < this.ranges.length; i++) |
| 983 if (!this.ranges[i].empty()) return true; |
| 984 return false; |
| 985 }, |
| 986 contains: function(pos, end) { |
| 987 if (!end) end = pos; |
| 988 for (var i = 0; i < this.ranges.length; i++) { |
| 989 var range = this.ranges[i]; |
| 990 if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0) |
| 991 return i; |
| 992 } |
| 993 return -1; |
| 994 } |
| 995 }; |
| 996 |
| 997 function Range(anchor, head) { |
| 998 this.anchor = anchor; this.head = head; |
| 999 } |
| 1000 |
| 1001 Range.prototype = { |
| 1002 from: function() { return minPos(this.anchor, this.head); }, |
| 1003 to: function() { return maxPos(this.anchor, this.head); }, |
| 1004 empty: function() { |
| 1005 return this.head.line == this.anchor.line && this.head.ch == this.anchor.c
h; |
| 1006 } |
| 1007 }; |
| 1008 |
| 1009 // Take an unsorted, potentially overlapping set of ranges, and |
| 1010 // build a selection out of it. 'Consumes' ranges array (modifying |
| 1011 // it). |
| 1012 function normalizeSelection(ranges, primIndex) { |
| 1013 var prim = ranges[primIndex]; |
| 1014 ranges.sort(function(a, b) { return cmp(a.from(), b.from()); }); |
| 1015 primIndex = indexOf(ranges, prim); |
| 1016 for (var i = 1; i < ranges.length; i++) { |
| 1017 var cur = ranges[i], prev = ranges[i - 1]; |
| 1018 if (cmp(prev.to(), cur.from()) >= 0) { |
| 1019 var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.t
o()); |
| 1020 var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.he
ad; |
| 1021 if (i <= primIndex) --primIndex; |
| 1022 ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to)); |
| 1023 } |
| 1024 } |
| 1025 return new Selection(ranges, primIndex); |
| 1026 } |
| 1027 |
| 1028 function simpleSelection(anchor, head) { |
| 1029 return new Selection([new Range(anchor, head || anchor)], 0); |
| 1030 } |
| 1031 |
| 1032 // Most of the external API clips given positions to make sure they |
| 1033 // actually exist within the document. |
| 1034 function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first +
doc.size - 1));} |
| 1035 function clipPos(doc, pos) { |
| 1036 if (pos.line < doc.first) return Pos(doc.first, 0); |
| 1037 var last = doc.first + doc.size - 1; |
| 1038 if (pos.line > last) return Pos(last, getLine(doc, last).text.length); |
| 1039 return clipToLen(pos, getLine(doc, pos.line).text.length); |
| 1040 } |
| 1041 function clipToLen(pos, linelen) { |
| 1042 var ch = pos.ch; |
| 1043 if (ch == null || ch > linelen) return Pos(pos.line, linelen); |
| 1044 else if (ch < 0) return Pos(pos.line, 0); |
| 1045 else return pos; |
| 1046 } |
| 1047 function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;} |
| 1048 function clipPosArray(doc, array) { |
| 1049 for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array
[i]); |
| 1050 return out; |
| 1051 } |
| 1052 |
| 1053 // SELECTION UPDATES |
| 1054 |
| 1055 // The 'scroll' parameter given to many of these indicated whether |
| 1056 // the new cursor position should be scrolled into view after |
| 1057 // modifying the selection. |
| 1058 |
| 1059 // If shift is held or the extend flag is set, extends a range to |
| 1060 // include a given position (and optionally a second position). |
| 1061 // Otherwise, simply returns the range between the given positions. |
| 1062 // Used for cursor motion and such. |
| 1063 function extendRange(doc, range, head, other) { |
| 1064 if (doc.cm && doc.cm.display.shift || doc.extend) { |
| 1065 var anchor = range.anchor; |
| 1066 if (other) { |
| 1067 var posBefore = cmp(head, anchor) < 0; |
| 1068 if (posBefore != (cmp(other, anchor) < 0)) { |
| 1069 anchor = head; |
| 1070 head = other; |
| 1071 } else if (posBefore != (cmp(head, other) < 0)) { |
| 1072 head = other; |
| 1073 } |
| 1074 } |
| 1075 return new Range(anchor, head); |
| 1076 } else { |
| 1077 return new Range(other || head, head); |
| 1078 } |
| 1079 } |
| 1080 |
| 1081 // Extend the primary selection range, discard the rest. |
| 1082 function extendSelection(doc, head, other, options) { |
| 1083 setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, o
ther)], 0), options); |
| 1084 } |
| 1085 |
| 1086 // Extend all selections (pos is an array of selections with length |
| 1087 // equal the number of selections) |
| 1088 function extendSelections(doc, heads, options) { |
| 1089 for (var out = [], i = 0; i < doc.sel.ranges.length; i++) |
| 1090 out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null); |
| 1091 var newSel = normalizeSelection(out, doc.sel.primIndex); |
| 1092 setSelection(doc, newSel, options); |
| 1093 } |
| 1094 |
| 1095 // Updates a single range in the selection. |
| 1096 function replaceOneSelection(doc, i, range, options) { |
| 1097 var ranges = doc.sel.ranges.slice(0); |
| 1098 ranges[i] = range; |
| 1099 setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options); |
| 1100 } |
| 1101 |
| 1102 // Reset the selection to a single range. |
| 1103 function setSimpleSelection(doc, anchor, head, options) { |
| 1104 setSelection(doc, simpleSelection(anchor, head), options); |
| 1105 } |
| 1106 |
| 1107 // Give beforeSelectionChange handlers a change to influence a |
| 1108 // selection update. |
| 1109 function filterSelectionChange(doc, sel) { |
| 1110 var obj = { |
| 1111 ranges: sel.ranges, |
| 1112 update: function(ranges) { |
| 1113 this.ranges = []; |
| 1114 for (var i = 0; i < ranges.length; i++) |
| 1115 this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor), |
| 1116 clipPos(doc, ranges[i].head)); |
| 1117 } |
| 1118 }; |
| 1119 signal(doc, "beforeSelectionChange", doc, obj); |
| 1120 if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj); |
| 1121 if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.rang
es.length - 1); |
| 1122 else return sel; |
| 1123 } |
| 1124 |
| 1125 function setSelectionReplaceHistory(doc, sel, options) { |
| 1126 var done = doc.history.done, last = lst(done); |
| 1127 if (last && last.ranges) { |
| 1128 done[done.length - 1] = sel; |
| 1129 setSelectionNoUndo(doc, sel, options); |
| 1130 } else { |
| 1131 setSelection(doc, sel, options); |
| 1132 } |
| 1133 } |
| 1134 |
| 1135 // Set a new selection. |
| 1136 function setSelection(doc, sel, options) { |
| 1137 setSelectionNoUndo(doc, sel, options); |
| 1138 addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options)
; |
| 1139 } |
| 1140 |
| 1141 function setSelectionNoUndo(doc, sel, options) { |
| 1142 if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm,
"beforeSelectionChange")) |
| 1143 sel = filterSelectionChange(doc, sel); |
| 1144 |
| 1145 var bias = cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1; |
| 1146 setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true)); |
| 1147 |
| 1148 if (!(options && options.scroll === false) && doc.cm) |
| 1149 ensureCursorVisible(doc.cm); |
| 1150 } |
| 1151 |
| 1152 function setSelectionInner(doc, sel) { |
| 1153 if (sel.equals(doc.sel)) return; |
| 1154 |
| 1155 doc.sel = sel; |
| 1156 |
| 1157 if (doc.cm) { |
| 1158 doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true; |
| 1159 signalCursorActivity(doc.cm); |
| 1160 } |
| 1161 signalLater(doc, "cursorActivity", doc); |
| 1162 } |
| 1163 |
| 1164 // Verify that the selection does not partially select any atomic |
| 1165 // marked ranges. |
| 1166 function reCheckSelection(doc) { |
| 1167 setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel
_dontScroll); |
| 1168 } |
| 1169 |
| 1170 // Return a selection that does not partially select any atomic |
| 1171 // ranges. |
| 1172 function skipAtomicInSelection(doc, sel, bias, mayClear) { |
| 1173 var out; |
| 1174 for (var i = 0; i < sel.ranges.length; i++) { |
| 1175 var range = sel.ranges[i]; |
| 1176 var newAnchor = skipAtomic(doc, range.anchor, bias, mayClear); |
| 1177 var newHead = skipAtomic(doc, range.head, bias, mayClear); |
| 1178 if (out || newAnchor != range.anchor || newHead != range.head) { |
| 1179 if (!out) out = sel.ranges.slice(0, i); |
| 1180 out[i] = new Range(newAnchor, newHead); |
| 1181 } |
| 1182 } |
| 1183 return out ? normalizeSelection(out, sel.primIndex) : sel; |
| 1184 } |
| 1185 |
| 1186 // Ensure a given position is not inside an atomic range. |
| 1187 function skipAtomic(doc, pos, bias, mayClear) { |
| 1188 var flipped = false, curPos = pos; |
| 1189 var dir = bias || 1; |
| 1190 doc.cantEdit = false; |
| 1191 search: for (;;) { |
| 1192 var line = getLine(doc, curPos.line); |
| 1193 if (line.markedSpans) { |
| 1194 for (var i = 0; i < line.markedSpans.length; ++i) { |
| 1195 var sp = line.markedSpans[i], m = sp.marker; |
| 1196 if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.f
rom < curPos.ch)) && |
| 1197 (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to >
curPos.ch))) { |
| 1198 if (mayClear) { |
| 1199 signal(m, "beforeCursorEnter"); |
| 1200 if (m.explicitlyCleared) { |
| 1201 if (!line.markedSpans) break; |
| 1202 else {--i; continue;} |
| 1203 } |
| 1204 } |
| 1205 if (!m.atomic) continue; |
| 1206 var newPos = m.find(dir < 0 ? -1 : 1); |
| 1207 if (cmp(newPos, curPos) == 0) { |
| 1208 newPos.ch += dir; |
| 1209 if (newPos.ch < 0) { |
| 1210 if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.li
ne - 1)); |
| 1211 else newPos = null; |
| 1212 } else if (newPos.ch > line.text.length) { |
| 1213 if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.
line + 1, 0); |
| 1214 else newPos = null; |
| 1215 } |
| 1216 if (!newPos) { |
| 1217 if (flipped) { |
| 1218 // Driven in a corner -- no valid cursor position found at all |
| 1219 // -- try again *with* clearing, if we didn't already |
| 1220 if (!mayClear) return skipAtomic(doc, pos, bias, true); |
| 1221 // Otherwise, turn off editing until further notice, and retur
n the start of the doc |
| 1222 doc.cantEdit = true; |
| 1223 return Pos(doc.first, 0); |
| 1224 } |
| 1225 flipped = true; newPos = pos; dir = -dir; |
| 1226 } |
| 1227 } |
| 1228 curPos = newPos; |
| 1229 continue search; |
| 1230 } |
| 1231 } |
| 1232 } |
| 1233 return curPos; |
| 1234 } |
| 1235 } |
| 1236 |
| 1237 // SELECTION DRAWING |
| 1238 |
| 1239 // Redraw the selection and/or cursor |
| 1240 function updateSelection(cm) { |
| 1241 var display = cm.display, doc = cm.doc; |
| 1242 var curFragment = document.createDocumentFragment(); |
| 1243 var selFragment = document.createDocumentFragment(); |
| 1244 |
| 1245 for (var i = 0; i < doc.sel.ranges.length; i++) { |
| 1246 var range = doc.sel.ranges[i]; |
| 1247 var collapsed = range.empty(); |
| 1248 if (collapsed || cm.options.showCursorWhenSelecting) |
| 1249 drawSelectionCursor(cm, range, curFragment); |
| 1250 if (!collapsed) |
| 1251 drawSelectionRange(cm, range, selFragment); |
| 1252 } |
| 1253 |
| 1254 // Move the hidden textarea near the cursor to prevent scrolling artifacts |
| 1255 if (cm.options.moveInputWithCursor) { |
| 1256 var headPos = cursorCoords(cm, doc.sel.primary().head, "div"); |
| 1257 var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.l
ineDiv.getBoundingClientRect(); |
| 1258 var top = Math.max(0, Math.min(display.wrapper.clientHeight - 10, |
| 1259 headPos.top + lineOff.top - wrapOff.top)); |
| 1260 var left = Math.max(0, Math.min(display.wrapper.clientWidth - 10, |
| 1261 headPos.left + lineOff.left - wrapOff.left
)); |
| 1262 display.inputDiv.style.top = top + "px"; |
| 1263 display.inputDiv.style.left = left + "px"; |
| 1264 } |
| 1265 |
| 1266 removeChildrenAndAdd(display.cursorDiv, curFragment); |
| 1267 removeChildrenAndAdd(display.selectionDiv, selFragment); |
| 1268 } |
| 1269 |
| 1270 // Draws a cursor for the given range |
| 1271 function drawSelectionCursor(cm, range, output) { |
| 1272 var pos = cursorCoords(cm, range.head, "div"); |
| 1273 |
| 1274 var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor")); |
| 1275 cursor.style.left = pos.left + "px"; |
| 1276 cursor.style.top = pos.top + "px"; |
| 1277 cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorH
eight + "px"; |
| 1278 |
| 1279 if (pos.other) { |
| 1280 // Secondary cursor, shown when on a 'jump' in bi-directional text |
| 1281 var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-curs
or CodeMirror-secondarycursor")); |
| 1282 otherCursor.style.display = ""; |
| 1283 otherCursor.style.left = pos.other.left + "px"; |
| 1284 otherCursor.style.top = pos.other.top + "px"; |
| 1285 otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"
; |
| 1286 } |
| 1287 } |
| 1288 |
| 1289 // Draws the given range as a highlighted selection |
| 1290 function drawSelectionRange(cm, range, output) { |
| 1291 var display = cm.display, doc = cm.doc; |
| 1292 var fragment = document.createDocumentFragment(); |
| 1293 var padding = paddingH(cm.display), leftSide = padding.left, rightSide = dis
play.lineSpace.offsetWidth - padding.right; |
| 1294 |
| 1295 function add(left, top, width, bottom) { |
| 1296 if (top < 0) top = 0; |
| 1297 top = Math.round(top); |
| 1298 bottom = Math.round(bottom); |
| 1299 fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: ab
solute; left: " + left + |
| 1300 "px; top: " + top + "px; width: " + (width == nul
l ? rightSide - left : width) + |
| 1301 "px; height: " + (bottom - top) + "px")); |
| 1302 } |
| 1303 |
| 1304 function drawForLine(line, fromArg, toArg) { |
| 1305 var lineObj = getLine(doc, line); |
| 1306 var lineLen = lineObj.text.length; |
| 1307 var start, end; |
| 1308 function coords(ch, bias) { |
| 1309 return charCoords(cm, Pos(line, ch), "div", lineObj, bias); |
| 1310 } |
| 1311 |
| 1312 iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineL
en : toArg, function(from, to, dir) { |
| 1313 var leftPos = coords(from, "left"), rightPos, left, right; |
| 1314 if (from == to) { |
| 1315 rightPos = leftPos; |
| 1316 left = right = leftPos.left; |
| 1317 } else { |
| 1318 rightPos = coords(to - 1, "right"); |
| 1319 if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos =
tmp; } |
| 1320 left = leftPos.left; |
| 1321 right = rightPos.right; |
| 1322 } |
| 1323 if (fromArg == null && from == 0) left = leftSide; |
| 1324 if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part |
| 1325 add(left, leftPos.top, null, leftPos.bottom); |
| 1326 left = leftSide; |
| 1327 if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rig
htPos.top); |
| 1328 } |
| 1329 if (toArg == null && to == lineLen) right = rightSide; |
| 1330 if (!start || leftPos.top < start.top || leftPos.top == start.top && lef
tPos.left < start.left) |
| 1331 start = leftPos; |
| 1332 if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.botto
m && rightPos.right > end.right) |
| 1333 end = rightPos; |
| 1334 if (left < leftSide + 1) left = leftSide; |
| 1335 add(left, rightPos.top, right - left, rightPos.bottom); |
| 1336 }); |
| 1337 return {start: start, end: end}; |
| 1338 } |
| 1339 |
| 1340 var sFrom = range.from(), sTo = range.to(); |
| 1341 if (sFrom.line == sTo.line) { |
| 1342 drawForLine(sFrom.line, sFrom.ch, sTo.ch); |
| 1343 } else { |
| 1344 var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line); |
| 1345 var singleVLine = visualLine(fromLine) == visualLine(toLine); |
| 1346 var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.tex
t.length + 1 : null).end; |
| 1347 var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).sta
rt; |
| 1348 if (singleVLine) { |
| 1349 if (leftEnd.top < rightStart.top - 2) { |
| 1350 add(leftEnd.right, leftEnd.top, null, leftEnd.bottom); |
| 1351 add(leftSide, rightStart.top, rightStart.left, rightStart.bottom); |
| 1352 } else { |
| 1353 add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftE
nd.bottom); |
| 1354 } |
| 1355 } |
| 1356 if (leftEnd.bottom < rightStart.top) |
| 1357 add(leftSide, leftEnd.bottom, null, rightStart.top); |
| 1358 } |
| 1359 |
| 1360 output.appendChild(fragment); |
| 1361 } |
| 1362 |
| 1363 // Cursor-blinking |
| 1364 function restartBlink(cm) { |
| 1365 if (!cm.state.focused) return; |
| 1366 var display = cm.display; |
| 1367 clearInterval(display.blinker); |
| 1368 var on = true; |
| 1369 display.cursorDiv.style.visibility = ""; |
| 1370 if (cm.options.cursorBlinkRate > 0) |
| 1371 display.blinker = setInterval(function() { |
| 1372 display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; |
| 1373 }, cm.options.cursorBlinkRate); |
| 1374 } |
| 1375 |
| 1376 // HIGHLIGHT WORKER |
| 1377 |
| 1378 function startWorker(cm, time) { |
| 1379 if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo) |
| 1380 cm.state.highlight.set(time, bind(highlightWorker, cm)); |
| 1381 } |
| 1382 |
| 1383 function highlightWorker(cm) { |
| 1384 var doc = cm.doc; |
| 1385 if (doc.frontier < doc.first) doc.frontier = doc.first; |
| 1386 if (doc.frontier >= cm.display.viewTo) return; |
| 1387 var end = +new Date + cm.options.workTime; |
| 1388 var state = copyState(doc.mode, getStateBefore(cm, doc.frontier)); |
| 1389 |
| 1390 runInOp(cm, function() { |
| 1391 doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 50
0), function(line) { |
| 1392 if (doc.frontier >= cm.display.viewFrom) { // Visible |
| 1393 var oldStyles = line.styles; |
| 1394 var highlighted = highlightLine(cm, line, state, true); |
| 1395 line.styles = highlighted.styles; |
| 1396 if (highlighted.classes) line.styleClasses = highlighted.classes; |
| 1397 else if (line.styleClasses) line.styleClasses = null; |
| 1398 var ischange = !oldStyles || oldStyles.length != line.styles.length; |
| 1399 for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldSt
yles[i] != line.styles[i]; |
| 1400 if (ischange) regLineChange(cm, doc.frontier, "text"); |
| 1401 line.stateAfter = copyState(doc.mode, state); |
| 1402 } else { |
| 1403 processLine(cm, line.text, state); |
| 1404 line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : n
ull; |
| 1405 } |
| 1406 ++doc.frontier; |
| 1407 if (+new Date > end) { |
| 1408 startWorker(cm, cm.options.workDelay); |
| 1409 return true; |
| 1410 } |
| 1411 }); |
| 1412 }); |
| 1413 } |
| 1414 |
| 1415 // Finds the line to start with when starting a parse. Tries to |
| 1416 // find a line with a stateAfter, so that it can start with a |
| 1417 // valid state. If that fails, it returns the line with the |
| 1418 // smallest indentation, which tends to need the least context to |
| 1419 // parse correctly. |
| 1420 function findStartLine(cm, n, precise) { |
| 1421 var minindent, minline, doc = cm.doc; |
| 1422 var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100); |
| 1423 for (var search = n; search > lim; --search) { |
| 1424 if (search <= doc.first) return doc.first; |
| 1425 var line = getLine(doc, search - 1); |
| 1426 if (line.stateAfter && (!precise || search <= doc.frontier)) return search
; |
| 1427 var indented = countColumn(line.text, null, cm.options.tabSize); |
| 1428 if (minline == null || minindent > indented) { |
| 1429 minline = search - 1; |
| 1430 minindent = indented; |
| 1431 } |
| 1432 } |
| 1433 return minline; |
| 1434 } |
| 1435 |
| 1436 function getStateBefore(cm, n, precise) { |
| 1437 var doc = cm.doc, display = cm.display; |
| 1438 if (!doc.mode.startState) return true; |
| 1439 var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(
doc, pos-1).stateAfter; |
| 1440 if (!state) state = startState(doc.mode); |
| 1441 else state = copyState(doc.mode, state); |
| 1442 doc.iter(pos, n, function(line) { |
| 1443 processLine(cm, line.text, state); |
| 1444 var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos
< display.viewTo; |
| 1445 line.stateAfter = save ? copyState(doc.mode, state) : null; |
| 1446 ++pos; |
| 1447 }); |
| 1448 if (precise) doc.frontier = pos; |
| 1449 return state; |
| 1450 } |
| 1451 |
| 1452 // POSITION MEASUREMENT |
| 1453 |
| 1454 function paddingTop(display) {return display.lineSpace.offsetTop;} |
| 1455 function paddingVert(display) {return display.mover.offsetHeight - display.lin
eSpace.offsetHeight;} |
| 1456 function paddingH(display) { |
| 1457 if (display.cachedPaddingH) return display.cachedPaddingH; |
| 1458 var e = removeChildrenAndAdd(display.measure, elt("pre", "x")); |
| 1459 var style = window.getComputedStyle ? window.getComputedStyle(e) : e.current
Style; |
| 1460 var data = {left: parseInt(style.paddingLeft), right: parseInt(style.padding
Right)}; |
| 1461 if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data; |
| 1462 return data; |
| 1463 } |
| 1464 |
| 1465 // Ensure the lineView.wrapping.heights array is populated. This is |
| 1466 // an array of bottom offsets for the lines that make up a drawn |
| 1467 // line. When lineWrapping is on, there might be more than one |
| 1468 // height. |
| 1469 function ensureLineHeights(cm, lineView, rect) { |
| 1470 var wrapping = cm.options.lineWrapping; |
| 1471 var curWidth = wrapping && cm.display.scroller.clientWidth; |
| 1472 if (!lineView.measure.heights || wrapping && lineView.measure.width != curWi
dth) { |
| 1473 var heights = lineView.measure.heights = []; |
| 1474 if (wrapping) { |
| 1475 lineView.measure.width = curWidth; |
| 1476 var rects = lineView.text.firstChild.getClientRects(); |
| 1477 for (var i = 0; i < rects.length - 1; i++) { |
| 1478 var cur = rects[i], next = rects[i + 1]; |
| 1479 if (Math.abs(cur.bottom - next.bottom) > 2) |
| 1480 heights.push((cur.bottom + next.top) / 2 - rect.top); |
| 1481 } |
| 1482 } |
| 1483 heights.push(rect.bottom - rect.top); |
| 1484 } |
| 1485 } |
| 1486 |
| 1487 // Find a line map (mapping character offsets to text nodes) and a |
| 1488 // measurement cache for the given line number. (A line view might |
| 1489 // contain multiple lines when collapsed ranges are present.) |
| 1490 function mapFromLineView(lineView, line, lineN) { |
| 1491 if (lineView.line == line) |
| 1492 return {map: lineView.measure.map, cache: lineView.measure.cache}; |
| 1493 for (var i = 0; i < lineView.rest.length; i++) |
| 1494 if (lineView.rest[i] == line) |
| 1495 return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]
}; |
| 1496 for (var i = 0; i < lineView.rest.length; i++) |
| 1497 if (lineNo(lineView.rest[i]) > lineN) |
| 1498 return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]
, before: true}; |
| 1499 } |
| 1500 |
| 1501 // Render a line into the hidden node display.externalMeasured. Used |
| 1502 // when measurement is needed for a line that's not in the viewport. |
| 1503 function updateExternalMeasurement(cm, line) { |
| 1504 line = visualLine(line); |
| 1505 var lineN = lineNo(line); |
| 1506 var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN); |
| 1507 view.lineN = lineN; |
| 1508 var built = view.built = buildLineContent(cm, view); |
| 1509 view.text = built.pre; |
| 1510 removeChildrenAndAdd(cm.display.lineMeasure, built.pre); |
| 1511 return view; |
| 1512 } |
| 1513 |
| 1514 // Get a {top, bottom, left, right} box (in line-local coordinates) |
| 1515 // for a given character. |
| 1516 function measureChar(cm, line, ch, bias) { |
| 1517 return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias); |
| 1518 } |
| 1519 |
| 1520 // Find a line view that corresponds to the given line number. |
| 1521 function findViewForLine(cm, lineN) { |
| 1522 if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo) |
| 1523 return cm.display.view[findViewIndex(cm, lineN)]; |
| 1524 var ext = cm.display.externalMeasured; |
| 1525 if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size) |
| 1526 return ext; |
| 1527 } |
| 1528 |
| 1529 // Measurement can be split in two steps, the set-up work that |
| 1530 // applies to the whole line, and the measurement of the actual |
| 1531 // character. Functions like coordsChar, that need to do a lot of |
| 1532 // measurements in a row, can thus ensure that the set-up work is |
| 1533 // only done once. |
| 1534 function prepareMeasureForLine(cm, line) { |
| 1535 var lineN = lineNo(line); |
| 1536 var view = findViewForLine(cm, lineN); |
| 1537 if (view && !view.text) |
| 1538 view = null; |
| 1539 else if (view && view.changes) |
| 1540 updateLineForChanges(cm, view, lineN, getDimensions(cm)); |
| 1541 if (!view) |
| 1542 view = updateExternalMeasurement(cm, line); |
| 1543 |
| 1544 var info = mapFromLineView(view, line, lineN); |
| 1545 return { |
| 1546 line: line, view: view, rect: null, |
| 1547 map: info.map, cache: info.cache, before: info.before, |
| 1548 hasHeights: false |
| 1549 }; |
| 1550 } |
| 1551 |
| 1552 // Given a prepared measurement object, measures the position of an |
| 1553 // actual character (or fetches it from the cache). |
| 1554 function measureCharPrepared(cm, prepared, ch, bias) { |
| 1555 if (prepared.before) ch = -1; |
| 1556 var key = ch + (bias || ""), found; |
| 1557 if (prepared.cache.hasOwnProperty(key)) { |
| 1558 found = prepared.cache[key]; |
| 1559 } else { |
| 1560 if (!prepared.rect) |
| 1561 prepared.rect = prepared.view.text.getBoundingClientRect(); |
| 1562 if (!prepared.hasHeights) { |
| 1563 ensureLineHeights(cm, prepared.view, prepared.rect); |
| 1564 prepared.hasHeights = true; |
| 1565 } |
| 1566 found = measureCharInner(cm, prepared, ch, bias); |
| 1567 if (!found.bogus) prepared.cache[key] = found; |
| 1568 } |
| 1569 return {left: found.left, right: found.right, top: found.top, bottom: found.
bottom}; |
| 1570 } |
| 1571 |
| 1572 var nullRect = {left: 0, right: 0, top: 0, bottom: 0}; |
| 1573 |
| 1574 function measureCharInner(cm, prepared, ch, bias) { |
| 1575 var map = prepared.map; |
| 1576 |
| 1577 var node, start, end, collapse; |
| 1578 // First, search the line map for the text node corresponding to, |
| 1579 // or closest to, the target character. |
| 1580 for (var i = 0; i < map.length; i += 3) { |
| 1581 var mStart = map[i], mEnd = map[i + 1]; |
| 1582 if (ch < mStart) { |
| 1583 start = 0; end = 1; |
| 1584 collapse = "left"; |
| 1585 } else if (ch < mEnd) { |
| 1586 start = ch - mStart; |
| 1587 end = start + 1; |
| 1588 } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) { |
| 1589 end = mEnd - mStart; |
| 1590 start = end - 1; |
| 1591 if (ch >= mEnd) collapse = "right"; |
| 1592 } |
| 1593 if (start != null) { |
| 1594 node = map[i + 2]; |
| 1595 if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right")) |
| 1596 collapse = bias; |
| 1597 if (bias == "left" && start == 0) |
| 1598 while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) { |
| 1599 node = map[(i -= 3) + 2]; |
| 1600 collapse = "left"; |
| 1601 } |
| 1602 if (bias == "right" && start == mEnd - mStart) |
| 1603 while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].i
nsertLeft) { |
| 1604 node = map[(i += 3) + 2]; |
| 1605 collapse = "right"; |
| 1606 } |
| 1607 break; |
| 1608 } |
| 1609 } |
| 1610 |
| 1611 var rect; |
| 1612 if (node.nodeType == 3) { // If it is a text node, use a range to retrieve t
he coordinates. |
| 1613 while (start && isExtendingChar(prepared.line.text.charAt(mStart + start))
) --start; |
| 1614 while (mStart + end < mEnd && isExtendingChar(prepared.line.text.charAt(mS
tart + end))) ++end; |
| 1615 if (ie_upto8 && start == 0 && end == mEnd - mStart) { |
| 1616 rect = node.parentNode.getBoundingClientRect(); |
| 1617 } else if (ie && cm.options.lineWrapping) { |
| 1618 var rects = range(node, start, end).getClientRects(); |
| 1619 if (rects.length) |
| 1620 rect = rects[bias == "right" ? rects.length - 1 : 0]; |
| 1621 else |
| 1622 rect = nullRect; |
| 1623 } else { |
| 1624 rect = range(node, start, end).getBoundingClientRect(); |
| 1625 } |
| 1626 } else { // If it is a widget, simply get the box for the whole widget. |
| 1627 if (start > 0) collapse = bias = "right"; |
| 1628 var rects; |
| 1629 if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1) |
| 1630 rect = rects[bias == "right" ? rects.length - 1 : 0]; |
| 1631 else |
| 1632 rect = node.getBoundingClientRect(); |
| 1633 } |
| 1634 if (ie_upto8 && !start && (!rect || !rect.left && !rect.right)) { |
| 1635 var rSpan = node.parentNode.getClientRects()[0]; |
| 1636 if (rSpan) |
| 1637 rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top
: rSpan.top, bottom: rSpan.bottom}; |
| 1638 else |
| 1639 rect = nullRect; |
| 1640 } |
| 1641 |
| 1642 var top, bot = (rect.bottom + rect.top) / 2 - prepared.rect.top; |
| 1643 var heights = prepared.view.measure.heights; |
| 1644 for (var i = 0; i < heights.length - 1; i++) |
| 1645 if (bot < heights[i]) break; |
| 1646 top = i ? heights[i - 1] : 0; bot = heights[i]; |
| 1647 var result = {left: (collapse == "right" ? rect.right : rect.left) - prepare
d.rect.left, |
| 1648 right: (collapse == "left" ? rect.left : rect.right) - prepare
d.rect.left, |
| 1649 top: top, bottom: bot}; |
| 1650 if (!rect.left && !rect.right) result.bogus = true; |
| 1651 return result; |
| 1652 } |
| 1653 |
| 1654 function clearLineMeasurementCacheFor(lineView) { |
| 1655 if (lineView.measure) { |
| 1656 lineView.measure.cache = {}; |
| 1657 lineView.measure.heights = null; |
| 1658 if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) |
| 1659 lineView.measure.caches[i] = {}; |
| 1660 } |
| 1661 } |
| 1662 |
| 1663 function clearLineMeasurementCache(cm) { |
| 1664 cm.display.externalMeasure = null; |
| 1665 removeChildren(cm.display.lineMeasure); |
| 1666 for (var i = 0; i < cm.display.view.length; i++) |
| 1667 clearLineMeasurementCacheFor(cm.display.view[i]); |
| 1668 } |
| 1669 |
| 1670 function clearCaches(cm) { |
| 1671 clearLineMeasurementCache(cm); |
| 1672 cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cached
PaddingH = null; |
| 1673 if (!cm.options.lineWrapping) cm.display.maxLineChanged = true; |
| 1674 cm.display.lineNumChars = null; |
| 1675 } |
| 1676 |
| 1677 function pageScrollX() { return window.pageXOffset || (document.documentElemen
t || document.body).scrollLeft; } |
| 1678 function pageScrollY() { return window.pageYOffset || (document.documentElemen
t || document.body).scrollTop; } |
| 1679 |
| 1680 // Converts a {top, bottom, left, right} box from line-local |
| 1681 // coordinates into another coordinate system. Context may be one of |
| 1682 // "line", "div" (display.lineDiv), "local"/null (editor), or "page". |
| 1683 function intoCoordSystem(cm, lineObj, rect, context) { |
| 1684 if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (li
neObj.widgets[i].above) { |
| 1685 var size = widgetHeight(lineObj.widgets[i]); |
| 1686 rect.top += size; rect.bottom += size; |
| 1687 } |
| 1688 if (context == "line") return rect; |
| 1689 if (!context) context = "local"; |
| 1690 var yOff = heightAtLine(lineObj); |
| 1691 if (context == "local") yOff += paddingTop(cm.display); |
| 1692 else yOff -= cm.display.viewOffset; |
| 1693 if (context == "page" || context == "window") { |
| 1694 var lOff = cm.display.lineSpace.getBoundingClientRect(); |
| 1695 yOff += lOff.top + (context == "window" ? 0 : pageScrollY()); |
| 1696 var xOff = lOff.left + (context == "window" ? 0 : pageScrollX()); |
| 1697 rect.left += xOff; rect.right += xOff; |
| 1698 } |
| 1699 rect.top += yOff; rect.bottom += yOff; |
| 1700 return rect; |
| 1701 } |
| 1702 |
| 1703 // Coverts a box from "div" coords to another coordinate system. |
| 1704 // Context may be "window", "page", "div", or "local"/null. |
| 1705 function fromCoordSystem(cm, coords, context) { |
| 1706 if (context == "div") return coords; |
| 1707 var left = coords.left, top = coords.top; |
| 1708 // First move into "page" coordinate system |
| 1709 if (context == "page") { |
| 1710 left -= pageScrollX(); |
| 1711 top -= pageScrollY(); |
| 1712 } else if (context == "local" || !context) { |
| 1713 var localBox = cm.display.sizer.getBoundingClientRect(); |
| 1714 left += localBox.left; |
| 1715 top += localBox.top; |
| 1716 } |
| 1717 |
| 1718 var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect(); |
| 1719 return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}; |
| 1720 } |
| 1721 |
| 1722 function charCoords(cm, pos, context, lineObj, bias) { |
| 1723 if (!lineObj) lineObj = getLine(cm.doc, pos.line); |
| 1724 return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias),
context); |
| 1725 } |
| 1726 |
| 1727 // Returns a box for a given cursor position, which may have an |
| 1728 // 'other' property containing the position of the secondary cursor |
| 1729 // on a bidi boundary. |
| 1730 function cursorCoords(cm, pos, context, lineObj, preparedMeasure) { |
| 1731 lineObj = lineObj || getLine(cm.doc, pos.line); |
| 1732 if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj); |
| 1733 function get(ch, right) { |
| 1734 var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "le
ft"); |
| 1735 if (right) m.left = m.right; else m.right = m.left; |
| 1736 return intoCoordSystem(cm, lineObj, m, context); |
| 1737 } |
| 1738 function getBidi(ch, partPos) { |
| 1739 var part = order[partPos], right = part.level % 2; |
| 1740 if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].lev
el) { |
| 1741 part = order[--partPos]; |
| 1742 ch = bidiRight(part) - (part.level % 2 ? 0 : 1); |
| 1743 right = true; |
| 1744 } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.lev
el < order[partPos + 1].level) { |
| 1745 part = order[++partPos]; |
| 1746 ch = bidiLeft(part) - part.level % 2; |
| 1747 right = false; |
| 1748 } |
| 1749 if (right && ch == part.to && ch > part.from) return get(ch - 1); |
| 1750 return get(ch, right); |
| 1751 } |
| 1752 var order = getOrder(lineObj), ch = pos.ch; |
| 1753 if (!order) return get(ch); |
| 1754 var partPos = getBidiPartAt(order, ch); |
| 1755 var val = getBidi(ch, partPos); |
| 1756 if (bidiOther != null) val.other = getBidi(ch, bidiOther); |
| 1757 return val; |
| 1758 } |
| 1759 |
| 1760 // Used to cheaply estimate the coordinates for a position. Used for |
| 1761 // intermediate scroll updates. |
| 1762 function estimateCoords(cm, pos) { |
| 1763 var left = 0, pos = clipPos(cm.doc, pos); |
| 1764 if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch; |
| 1765 var lineObj = getLine(cm.doc, pos.line); |
| 1766 var top = heightAtLine(lineObj) + paddingTop(cm.display); |
| 1767 return {left: left, right: left, top: top, bottom: top + lineObj.height}; |
| 1768 } |
| 1769 |
| 1770 // Positions returned by coordsChar contain some extra information. |
| 1771 // xRel is the relative x position of the input coordinates compared |
| 1772 // to the found position (so xRel > 0 means the coordinates are to |
| 1773 // the right of the character position, for example). When outside |
| 1774 // is true, that means the coordinates lie outside the line's |
| 1775 // vertical range. |
| 1776 function PosWithInfo(line, ch, outside, xRel) { |
| 1777 var pos = Pos(line, ch); |
| 1778 pos.xRel = xRel; |
| 1779 if (outside) pos.outside = true; |
| 1780 return pos; |
| 1781 } |
| 1782 |
| 1783 // Compute the character position closest to the given coordinates. |
| 1784 // Input must be lineSpace-local ("div" coordinate system). |
| 1785 function coordsChar(cm, x, y) { |
| 1786 var doc = cm.doc; |
| 1787 y += cm.display.viewOffset; |
| 1788 if (y < 0) return PosWithInfo(doc.first, 0, true, -1); |
| 1789 var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1; |
| 1790 if (lineN > last) |
| 1791 return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.lengt
h, true, 1); |
| 1792 if (x < 0) x = 0; |
| 1793 |
| 1794 var lineObj = getLine(doc, lineN); |
| 1795 for (;;) { |
| 1796 var found = coordsCharInner(cm, lineObj, lineN, x, y); |
| 1797 var merged = collapsedSpanAtEnd(lineObj); |
| 1798 var mergedPos = merged && merged.find(0, true); |
| 1799 if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.
ch && found.xRel > 0)) |
| 1800 lineN = lineNo(lineObj = mergedPos.to.line); |
| 1801 else |
| 1802 return found; |
| 1803 } |
| 1804 } |
| 1805 |
| 1806 function coordsCharInner(cm, lineObj, lineNo, x, y) { |
| 1807 var innerOff = y - heightAtLine(lineObj); |
| 1808 var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth; |
| 1809 var preparedMeasure = prepareMeasureForLine(cm, lineObj); |
| 1810 |
| 1811 function getX(ch) { |
| 1812 var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasur
e); |
| 1813 wrongLine = true; |
| 1814 if (innerOff > sp.bottom) return sp.left - adjust; |
| 1815 else if (innerOff < sp.top) return sp.left + adjust; |
| 1816 else wrongLine = false; |
| 1817 return sp.left; |
| 1818 } |
| 1819 |
| 1820 var bidi = getOrder(lineObj), dist = lineObj.text.length; |
| 1821 var from = lineLeft(lineObj), to = lineRight(lineObj); |
| 1822 var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside =
wrongLine; |
| 1823 |
| 1824 if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1); |
| 1825 // Do a binary search between these bounds. |
| 1826 for (;;) { |
| 1827 if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from
<= 1) { |
| 1828 var ch = x < fromX || x - fromX <= toX - x ? from : to; |
| 1829 var xDiff = x - (ch == from ? fromX : toX); |
| 1830 while (isExtendingChar(lineObj.text.charAt(ch))) ++ch; |
| 1831 var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside, |
| 1832 xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0); |
| 1833 return pos; |
| 1834 } |
| 1835 var step = Math.ceil(dist / 2), middle = from + step; |
| 1836 if (bidi) { |
| 1837 middle = from; |
| 1838 for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1)
; |
| 1839 } |
| 1840 var middleX = getX(middle); |
| 1841 if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) t
oX += 1000; dist = step;} |
| 1842 else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= ste
p;} |
| 1843 } |
| 1844 } |
| 1845 |
| 1846 var measureText; |
| 1847 // Compute the default text height. |
| 1848 function textHeight(display) { |
| 1849 if (display.cachedTextHeight != null) return display.cachedTextHeight; |
| 1850 if (measureText == null) { |
| 1851 measureText = elt("pre"); |
| 1852 // Measure a bunch of lines, for browsers that compute |
| 1853 // fractional heights. |
| 1854 for (var i = 0; i < 49; ++i) { |
| 1855 measureText.appendChild(document.createTextNode("x")); |
| 1856 measureText.appendChild(elt("br")); |
| 1857 } |
| 1858 measureText.appendChild(document.createTextNode("x")); |
| 1859 } |
| 1860 removeChildrenAndAdd(display.measure, measureText); |
| 1861 var height = measureText.offsetHeight / 50; |
| 1862 if (height > 3) display.cachedTextHeight = height; |
| 1863 removeChildren(display.measure); |
| 1864 return height || 1; |
| 1865 } |
| 1866 |
| 1867 // Compute the default character width. |
| 1868 function charWidth(display) { |
| 1869 if (display.cachedCharWidth != null) return display.cachedCharWidth; |
| 1870 var anchor = elt("span", "xxxxxxxxxx"); |
| 1871 var pre = elt("pre", [anchor]); |
| 1872 removeChildrenAndAdd(display.measure, pre); |
| 1873 var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left)
/ 10; |
| 1874 if (width > 2) display.cachedCharWidth = width; |
| 1875 return width || 10; |
| 1876 } |
| 1877 |
| 1878 // OPERATIONS |
| 1879 |
| 1880 // Operations are used to wrap a series of changes to the editor |
| 1881 // state in such a way that each change won't have to update the |
| 1882 // cursor and display (which would be awkward, slow, and |
| 1883 // error-prone). Instead, display updates are batched and then all |
| 1884 // combined and executed at once. |
| 1885 |
| 1886 var nextOpId = 0; |
| 1887 // Start a new operation. |
| 1888 function startOperation(cm) { |
| 1889 cm.curOp = { |
| 1890 viewChanged: false, // Flag that indicates that lines might need to b
e redrawn |
| 1891 startHeight: cm.doc.height, // Used to detect need to update scrollbar |
| 1892 forceUpdate: false, // Used to force a redraw |
| 1893 updateInput: null, // Whether to reset the input textarea |
| 1894 typing: false, // Whether this reset should be careful to leave
existing text (for compositing) |
| 1895 changeObjs: null, // Accumulated changes, for firing change events |
| 1896 cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on |
| 1897 selectionChanged: false, // Whether the selection needs to be redrawn |
| 1898 updateMaxLine: false, // Set when the widest line needs to be determine
d anew |
| 1899 scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pu
shed to DOM yet |
| 1900 scrollToPos: null, // Used to scroll to a specific position |
| 1901 id: ++nextOpId // Unique ID |
| 1902 }; |
| 1903 if (!delayedCallbackDepth++) delayedCallbacks = []; |
| 1904 } |
| 1905 |
| 1906 // Finish an operation, updating the display and signalling delayed events |
| 1907 function endOperation(cm) { |
| 1908 var op = cm.curOp, doc = cm.doc, display = cm.display; |
| 1909 cm.curOp = null; |
| 1910 |
| 1911 if (op.updateMaxLine) findMaxLine(cm); |
| 1912 |
| 1913 // If it looks like an update might be needed, call updateDisplay |
| 1914 if (op.viewChanged || op.forceUpdate || op.scrollTop != null || |
| 1915 op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom || |
| 1916 op.scrollToPos.to.line >= display.viewTo) || |
| 1917 display.maxLineChanged && cm.options.lineWrapping) { |
| 1918 var updated = updateDisplay(cm, {top: op.scrollTop, ensure: op.scrollToPos
}, op.forceUpdate); |
| 1919 if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroll
er.scrollTop; |
| 1920 } |
| 1921 // If no update was run, but the selection changed, redraw that. |
| 1922 if (!updated && op.selectionChanged) updateSelection(cm); |
| 1923 if (!updated && op.startHeight != cm.doc.height) updateScrollbars(cm); |
| 1924 |
| 1925 // Propagate the scroll position to the actual DOM scroller |
| 1926 if (op.scrollTop != null && display.scroller.scrollTop != op.scrollTop) { |
| 1927 var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scr
oller.clientHeight, op.scrollTop)); |
| 1928 display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop
= top; |
| 1929 } |
| 1930 if (op.scrollLeft != null && display.scroller.scrollLeft != op.scrollLeft) { |
| 1931 var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scr
oller.clientWidth, op.scrollLeft)); |
| 1932 display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLe
ft = left; |
| 1933 alignHorizontally(cm); |
| 1934 } |
| 1935 // If we need to scroll a specific position into view, do so. |
| 1936 if (op.scrollToPos) { |
| 1937 var coords = scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from), |
| 1938 clipPos(cm.doc, op.scrollToPos.to), op.scro
llToPos.margin); |
| 1939 if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coo
rds); |
| 1940 } |
| 1941 |
| 1942 if (op.selectionChanged) restartBlink(cm); |
| 1943 |
| 1944 if (cm.state.focused && op.updateInput) |
| 1945 resetInput(cm, op.typing); |
| 1946 |
| 1947 // Fire events for markers that are hidden/unidden by editing or |
| 1948 // undoing |
| 1949 var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers; |
| 1950 if (hidden) for (var i = 0; i < hidden.length; ++i) |
| 1951 if (!hidden[i].lines.length) signal(hidden[i], "hide"); |
| 1952 if (unhidden) for (var i = 0; i < unhidden.length; ++i) |
| 1953 if (unhidden[i].lines.length) signal(unhidden[i], "unhide"); |
| 1954 |
| 1955 var delayed; |
| 1956 if (!--delayedCallbackDepth) { |
| 1957 delayed = delayedCallbacks; |
| 1958 delayedCallbacks = null; |
| 1959 } |
| 1960 // Fire change events, and delayed event handlers |
| 1961 if (op.changeObjs) |
| 1962 signal(cm, "changes", cm, op.changeObjs); |
| 1963 if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i](); |
| 1964 if (op.cursorActivityHandlers) |
| 1965 for (var i = 0; i < op.cursorActivityHandlers.length; i++) |
| 1966 op.cursorActivityHandlers[i](cm); |
| 1967 } |
| 1968 |
| 1969 // Run the given function in an operation |
| 1970 function runInOp(cm, f) { |
| 1971 if (cm.curOp) return f(); |
| 1972 startOperation(cm); |
| 1973 try { return f(); } |
| 1974 finally { endOperation(cm); } |
| 1975 } |
| 1976 // Wraps a function in an operation. Returns the wrapped function. |
| 1977 function operation(cm, f) { |
| 1978 return function() { |
| 1979 if (cm.curOp) return f.apply(cm, arguments); |
| 1980 startOperation(cm); |
| 1981 try { return f.apply(cm, arguments); } |
| 1982 finally { endOperation(cm); } |
| 1983 }; |
| 1984 } |
| 1985 // Used to add methods to editor and doc instances, wrapping them in |
| 1986 // operations. |
| 1987 function methodOp(f) { |
| 1988 return function() { |
| 1989 if (this.curOp) return f.apply(this, arguments); |
| 1990 startOperation(this); |
| 1991 try { return f.apply(this, arguments); } |
| 1992 finally { endOperation(this); } |
| 1993 }; |
| 1994 } |
| 1995 function docMethodOp(f) { |
| 1996 return function() { |
| 1997 var cm = this.cm; |
| 1998 if (!cm || cm.curOp) return f.apply(this, arguments); |
| 1999 startOperation(cm); |
| 2000 try { return f.apply(this, arguments); } |
| 2001 finally { endOperation(cm); } |
| 2002 }; |
| 2003 } |
| 2004 |
| 2005 // VIEW TRACKING |
| 2006 |
| 2007 // These objects are used to represent the visible (currently drawn) |
| 2008 // part of the document. A LineView may correspond to multiple |
| 2009 // logical lines, if those are connected by collapsed ranges. |
| 2010 function LineView(doc, line, lineN) { |
| 2011 // The starting line |
| 2012 this.line = line; |
| 2013 // Continuing lines, if any |
| 2014 this.rest = visualLineContinued(line); |
| 2015 // Number of logical lines in this visual line |
| 2016 this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1; |
| 2017 this.node = this.text = null; |
| 2018 this.hidden = lineIsHidden(doc, line); |
| 2019 } |
| 2020 |
| 2021 // Create a range of LineView objects for the given lines. |
| 2022 function buildViewArray(cm, from, to) { |
| 2023 var array = [], nextPos; |
| 2024 for (var pos = from; pos < to; pos = nextPos) { |
| 2025 var view = new LineView(cm.doc, getLine(cm.doc, pos), pos); |
| 2026 nextPos = pos + view.size; |
| 2027 array.push(view); |
| 2028 } |
| 2029 return array; |
| 2030 } |
| 2031 |
| 2032 // Updates the display.view data structure for a given change to the |
| 2033 // document. From and to are in pre-change coordinates. Lendiff is |
| 2034 // the amount of lines added or subtracted by the change. This is |
| 2035 // used for changes that span multiple lines, or change the way |
| 2036 // lines are divided into visual lines. regLineChange (below) |
| 2037 // registers single-line changes. |
| 2038 function regChange(cm, from, to, lendiff) { |
| 2039 if (from == null) from = cm.doc.first; |
| 2040 if (to == null) to = cm.doc.first + cm.doc.size; |
| 2041 if (!lendiff) lendiff = 0; |
| 2042 |
| 2043 var display = cm.display; |
| 2044 if (lendiff && to < display.viewTo && |
| 2045 (display.updateLineNumbers == null || display.updateLineNumbers > from)) |
| 2046 display.updateLineNumbers = from; |
| 2047 |
| 2048 cm.curOp.viewChanged = true; |
| 2049 |
| 2050 if (from >= display.viewTo) { // Change after |
| 2051 if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo) |
| 2052 resetView(cm); |
| 2053 } else if (to <= display.viewFrom) { // Change before |
| 2054 if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.v
iewFrom) { |
| 2055 resetView(cm); |
| 2056 } else { |
| 2057 display.viewFrom += lendiff; |
| 2058 display.viewTo += lendiff; |
| 2059 } |
| 2060 } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overl
ap |
| 2061 resetView(cm); |
| 2062 } else if (from <= display.viewFrom) { // Top overlap |
| 2063 var cut = viewCuttingPoint(cm, to, to + lendiff, 1); |
| 2064 if (cut) { |
| 2065 display.view = display.view.slice(cut.index); |
| 2066 display.viewFrom = cut.lineN; |
| 2067 display.viewTo += lendiff; |
| 2068 } else { |
| 2069 resetView(cm); |
| 2070 } |
| 2071 } else if (to >= display.viewTo) { // Bottom overlap |
| 2072 var cut = viewCuttingPoint(cm, from, from, -1); |
| 2073 if (cut) { |
| 2074 display.view = display.view.slice(0, cut.index); |
| 2075 display.viewTo = cut.lineN; |
| 2076 } else { |
| 2077 resetView(cm); |
| 2078 } |
| 2079 } else { // Gap in the middle |
| 2080 var cutTop = viewCuttingPoint(cm, from, from, -1); |
| 2081 var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1); |
| 2082 if (cutTop && cutBot) { |
| 2083 display.view = display.view.slice(0, cutTop.index) |
| 2084 .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN)) |
| 2085 .concat(display.view.slice(cutBot.index)); |
| 2086 display.viewTo += lendiff; |
| 2087 } else { |
| 2088 resetView(cm); |
| 2089 } |
| 2090 } |
| 2091 |
| 2092 var ext = display.externalMeasured; |
| 2093 if (ext) { |
| 2094 if (to < ext.lineN) |
| 2095 ext.lineN += lendiff; |
| 2096 else if (from < ext.lineN + ext.size) |
| 2097 display.externalMeasured = null; |
| 2098 } |
| 2099 } |
| 2100 |
| 2101 // Register a change to a single line. Type must be one of "text", |
| 2102 // "gutter", "class", "widget" |
| 2103 function regLineChange(cm, line, type) { |
| 2104 cm.curOp.viewChanged = true; |
| 2105 var display = cm.display, ext = cm.display.externalMeasured; |
| 2106 if (ext && line >= ext.lineN && line < ext.lineN + ext.size) |
| 2107 display.externalMeasured = null; |
| 2108 |
| 2109 if (line < display.viewFrom || line >= display.viewTo) return; |
| 2110 var lineView = display.view[findViewIndex(cm, line)]; |
| 2111 if (lineView.node == null) return; |
| 2112 var arr = lineView.changes || (lineView.changes = []); |
| 2113 if (indexOf(arr, type) == -1) arr.push(type); |
| 2114 } |
| 2115 |
| 2116 // Clear the view. |
| 2117 function resetView(cm) { |
| 2118 cm.display.viewFrom = cm.display.viewTo = cm.doc.first; |
| 2119 cm.display.view = []; |
| 2120 cm.display.viewOffset = 0; |
| 2121 } |
| 2122 |
| 2123 // Find the view element corresponding to a given line. Return null |
| 2124 // when the line isn't visible. |
| 2125 function findViewIndex(cm, n) { |
| 2126 if (n >= cm.display.viewTo) return null; |
| 2127 n -= cm.display.viewFrom; |
| 2128 if (n < 0) return null; |
| 2129 var view = cm.display.view; |
| 2130 for (var i = 0; i < view.length; i++) { |
| 2131 n -= view[i].size; |
| 2132 if (n < 0) return i; |
| 2133 } |
| 2134 } |
| 2135 |
| 2136 function viewCuttingPoint(cm, oldN, newN, dir) { |
| 2137 var index = findViewIndex(cm, oldN), diff, view = cm.display.view; |
| 2138 if (!sawCollapsedSpans) return {index: index, lineN: newN}; |
| 2139 for (var i = 0, n = cm.display.viewFrom; i < index; i++) |
| 2140 n += view[i].size; |
| 2141 if (n != oldN) { |
| 2142 if (dir > 0) { |
| 2143 if (index == view.length - 1) return null; |
| 2144 diff = (n + view[index].size) - oldN; |
| 2145 index++; |
| 2146 } else { |
| 2147 diff = n - oldN; |
| 2148 } |
| 2149 oldN += diff; newN += diff; |
| 2150 } |
| 2151 while (visualLineNo(cm.doc, newN) != newN) { |
| 2152 if (index == (dir < 0 ? 0 : view.length - 1)) return null; |
| 2153 newN += dir * view[index - (dir < 0 ? 1 : 0)].size; |
| 2154 index += dir; |
| 2155 } |
| 2156 return {index: index, lineN: newN}; |
| 2157 } |
| 2158 |
| 2159 // Force the view to cover a given range, adding empty view element |
| 2160 // or clipping off existing ones as needed. |
| 2161 function adjustView(cm, from, to) { |
| 2162 var display = cm.display, view = display.view; |
| 2163 if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) { |
| 2164 display.view = buildViewArray(cm, from, to); |
| 2165 display.viewFrom = from; |
| 2166 } else { |
| 2167 if (display.viewFrom > from) |
| 2168 display.view = buildViewArray(cm, from, display.viewFrom).concat(display
.view); |
| 2169 else if (display.viewFrom < from) |
| 2170 display.view = display.view.slice(findViewIndex(cm, from)); |
| 2171 display.viewFrom = from; |
| 2172 if (display.viewTo < to) |
| 2173 display.view = display.view.concat(buildViewArray(cm, display.viewTo, to
)); |
| 2174 else if (display.viewTo > to) |
| 2175 display.view = display.view.slice(0, findViewIndex(cm, to)); |
| 2176 } |
| 2177 display.viewTo = to; |
| 2178 } |
| 2179 |
| 2180 // Count the number of lines in the view whose DOM representation is |
| 2181 // out of date (or nonexistent). |
| 2182 function countDirtyView(cm) { |
| 2183 var view = cm.display.view, dirty = 0; |
| 2184 for (var i = 0; i < view.length; i++) { |
| 2185 var lineView = view[i]; |
| 2186 if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty; |
| 2187 } |
| 2188 return dirty; |
| 2189 } |
| 2190 |
| 2191 // INPUT HANDLING |
| 2192 |
| 2193 // Poll for input changes, using the normal rate of polling. This |
| 2194 // runs as long as the editor is focused. |
| 2195 function slowPoll(cm) { |
| 2196 if (cm.display.pollingFast) return; |
| 2197 cm.display.poll.set(cm.options.pollInterval, function() { |
| 2198 readInput(cm); |
| 2199 if (cm.state.focused) slowPoll(cm); |
| 2200 }); |
| 2201 } |
| 2202 |
| 2203 // When an event has just come in that is likely to add or change |
| 2204 // something in the input textarea, we poll faster, to ensure that |
| 2205 // the change appears on the screen quickly. |
| 2206 function fastPoll(cm) { |
| 2207 var missed = false; |
| 2208 cm.display.pollingFast = true; |
| 2209 function p() { |
| 2210 var changed = readInput(cm); |
| 2211 if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);} |
| 2212 else {cm.display.pollingFast = false; slowPoll(cm);} |
| 2213 } |
| 2214 cm.display.poll.set(20, p); |
| 2215 } |
| 2216 |
| 2217 // Read input from the textarea, and update the document to match. |
| 2218 // When something is selected, it is present in the textarea, and |
| 2219 // selected (unless it is huge, in which case a placeholder is |
| 2220 // used). When nothing is selected, the cursor sits after previously |
| 2221 // seen text (can be empty), which is stored in prevInput (we must |
| 2222 // not reset the textarea when typing, because that breaks IME). |
| 2223 function readInput(cm) { |
| 2224 var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc
; |
| 2225 // Since this is called a *lot*, try to bail out as cheaply as |
| 2226 // possible when it is clear that nothing happened. hasSelection |
| 2227 // will be the case when there is a lot of text in the textarea, |
| 2228 // in which case reading its value would be expensive. |
| 2229 if (!cm.state.focused || (hasSelection(input) && !prevInput) || isReadOnly(c
m) || cm.options.disableInput) |
| 2230 return false; |
| 2231 // See paste handler for more on the fakedLastChar kludge |
| 2232 if (cm.state.pasteIncoming && cm.state.fakedLastChar) { |
| 2233 input.value = input.value.substring(0, input.value.length - 1); |
| 2234 cm.state.fakedLastChar = false; |
| 2235 } |
| 2236 var text = input.value; |
| 2237 // If nothing changed, bail. |
| 2238 if (text == prevInput && !cm.somethingSelected()) return false; |
| 2239 // Work around nonsensical selection resetting in IE9/10 |
| 2240 if (ie && !ie_upto8 && cm.display.inputHasSelection === text) { |
| 2241 resetInput(cm); |
| 2242 return false; |
| 2243 } |
| 2244 |
| 2245 var withOp = !cm.curOp; |
| 2246 if (withOp) startOperation(cm); |
| 2247 cm.display.shift = false; |
| 2248 |
| 2249 // Find the part of the input that is actually new |
| 2250 var same = 0, l = Math.min(prevInput.length, text.length); |
| 2251 while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++sa
me; |
| 2252 var inserted = text.slice(same), textLines = splitLines(inserted); |
| 2253 |
| 2254 // When pasing N lines into N selections, insert one line per selection |
| 2255 var multiPaste = cm.state.pasteIncoming && textLines.length > 1 && doc.sel.r
anges.length == textLines.length; |
| 2256 |
| 2257 // Normal behavior is to insert the new text into every selection |
| 2258 for (var i = doc.sel.ranges.length - 1; i >= 0; i--) { |
| 2259 var range = doc.sel.ranges[i]; |
| 2260 var from = range.from(), to = range.to(); |
| 2261 // Handle deletion |
| 2262 if (same < prevInput.length) |
| 2263 from = Pos(from.line, from.ch - (prevInput.length - same)); |
| 2264 // Handle overwrite |
| 2265 else if (cm.state.overwrite && range.empty() && !cm.state.pasteIncoming) |
| 2266 to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + ls
t(textLines).length)); |
| 2267 var updateInput = cm.curOp.updateInput; |
| 2268 var changeEvent = {from: from, to: to, text: multiPaste ? [textLines[i]] :
textLines, |
| 2269 origin: cm.state.pasteIncoming ? "paste" : cm.state.cut
Incoming ? "cut" : "+input"}; |
| 2270 makeChange(cm.doc, changeEvent); |
| 2271 signalLater(cm, "inputRead", cm, changeEvent); |
| 2272 // When an 'electric' character is inserted, immediately trigger a reinden
t |
| 2273 if (inserted && !cm.state.pasteIncoming && cm.options.electricChars && |
| 2274 cm.options.smartIndent && range.head.ch < 100 && |
| 2275 (!i || doc.sel.ranges[i - 1].head.line != range.head.line)) { |
| 2276 var mode = cm.getModeAt(range.head); |
| 2277 if (mode.electricChars) { |
| 2278 for (var j = 0; j < mode.electricChars.length; j++) |
| 2279 if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) { |
| 2280 indentLine(cm, range.head.line, "smart"); |
| 2281 break; |
| 2282 } |
| 2283 } else if (mode.electricInput) { |
| 2284 var end = changeEnd(changeEvent); |
| 2285 if (mode.electricInput.test(getLine(doc, end.line).text.slice(0, end.c
h))) |
| 2286 indentLine(cm, range.head.line, "smart"); |
| 2287 } |
| 2288 } |
| 2289 } |
| 2290 ensureCursorVisible(cm); |
| 2291 cm.curOp.updateInput = updateInput; |
| 2292 cm.curOp.typing = true; |
| 2293 |
| 2294 // Don't leave long text in the textarea, since it makes further polling slo
w |
| 2295 if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.
prevInput = ""; |
| 2296 else cm.display.prevInput = text; |
| 2297 if (withOp) endOperation(cm); |
| 2298 cm.state.pasteIncoming = cm.state.cutIncoming = false; |
| 2299 return true; |
| 2300 } |
| 2301 |
| 2302 // Reset the input to correspond to the selection (or to be empty, |
| 2303 // when not typing and nothing is selected) |
| 2304 function resetInput(cm, typing) { |
| 2305 var minimal, selected, doc = cm.doc; |
| 2306 if (cm.somethingSelected()) { |
| 2307 cm.display.prevInput = ""; |
| 2308 var range = doc.sel.primary(); |
| 2309 minimal = hasCopyEvent && |
| 2310 (range.to().line - range.from().line > 100 || (selected = cm.getSelectio
n()).length > 1000); |
| 2311 var content = minimal ? "-" : selected || cm.getSelection(); |
| 2312 cm.display.input.value = content; |
| 2313 if (cm.state.focused) selectInput(cm.display.input); |
| 2314 if (ie && !ie_upto8) cm.display.inputHasSelection = content; |
| 2315 } else if (!typing) { |
| 2316 cm.display.prevInput = cm.display.input.value = ""; |
| 2317 if (ie && !ie_upto8) cm.display.inputHasSelection = null; |
| 2318 } |
| 2319 cm.display.inaccurateSelection = minimal; |
| 2320 } |
| 2321 |
| 2322 function focusInput(cm) { |
| 2323 if (cm.options.readOnly != "nocursor" && (!mobile || activeElt() != cm.displ
ay.input)) |
| 2324 cm.display.input.focus(); |
| 2325 } |
| 2326 |
| 2327 function ensureFocus(cm) { |
| 2328 if (!cm.state.focused) { focusInput(cm); onFocus(cm); } |
| 2329 } |
| 2330 |
| 2331 function isReadOnly(cm) { |
| 2332 return cm.options.readOnly || cm.doc.cantEdit; |
| 2333 } |
| 2334 |
| 2335 // EVENT HANDLERS |
| 2336 |
| 2337 // Attach the necessary event handlers when initializing the editor |
| 2338 function registerEventHandlers(cm) { |
| 2339 var d = cm.display; |
| 2340 on(d.scroller, "mousedown", operation(cm, onMouseDown)); |
| 2341 // Older IE's will not fire a second mousedown for a double click |
| 2342 if (ie_upto10) |
| 2343 on(d.scroller, "dblclick", operation(cm, function(e) { |
| 2344 if (signalDOMEvent(cm, e)) return; |
| 2345 var pos = posFromMouse(cm, e); |
| 2346 if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return
; |
| 2347 e_preventDefault(e); |
| 2348 var word = findWordAt(cm.doc, pos); |
| 2349 extendSelection(cm.doc, word.anchor, word.head); |
| 2350 })); |
| 2351 else |
| 2352 on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preven
tDefault(e); }); |
| 2353 // Prevent normal selection in the editor (we handle our own) |
| 2354 on(d.lineSpace, "selectstart", function(e) { |
| 2355 if (!eventInWidget(d, e)) e_preventDefault(e); |
| 2356 }); |
| 2357 // Some browsers fire contextmenu *after* opening the menu, at |
| 2358 // which point we can't mess with it anymore. Context menu is |
| 2359 // handled in onMouseDown for these browsers. |
| 2360 if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContext
Menu(cm, e);}); |
| 2361 |
| 2362 // Sync scrolling between fake scrollbars and real scrollable |
| 2363 // area, ensure viewport is updated when scrolling. |
| 2364 on(d.scroller, "scroll", function() { |
| 2365 if (d.scroller.clientHeight) { |
| 2366 setScrollTop(cm, d.scroller.scrollTop); |
| 2367 setScrollLeft(cm, d.scroller.scrollLeft, true); |
| 2368 signal(cm, "scroll", cm); |
| 2369 } |
| 2370 }); |
| 2371 on(d.scrollbarV, "scroll", function() { |
| 2372 if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop); |
| 2373 }); |
| 2374 on(d.scrollbarH, "scroll", function() { |
| 2375 if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft); |
| 2376 }); |
| 2377 |
| 2378 // Listen to wheel events in order to try and update the viewport on time. |
| 2379 on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);}); |
| 2380 on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);}); |
| 2381 |
| 2382 // Prevent clicks in the scrollbars from killing focus |
| 2383 function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm),
0); } |
| 2384 on(d.scrollbarH, "mousedown", reFocus); |
| 2385 on(d.scrollbarV, "mousedown", reFocus); |
| 2386 // Prevent wrapper from ever scrolling |
| 2387 on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollL
eft = 0; }); |
| 2388 |
| 2389 // When the window resizes, we need to refresh active editors. |
| 2390 var resizeTimer; |
| 2391 function onResize() { |
| 2392 if (resizeTimer == null) resizeTimer = setTimeout(function() { |
| 2393 resizeTimer = null; |
| 2394 // Might be a text scaling operation, clear size caches. |
| 2395 d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = knownScrollb
arWidth = null; |
| 2396 cm.setSize(); |
| 2397 }, 100); |
| 2398 } |
| 2399 on(window, "resize", onResize); |
| 2400 // The above handler holds on to the editor and its data |
| 2401 // structures. Here we poll to unregister it when the editor is no |
| 2402 // longer in the document, so that it can be garbage-collected. |
| 2403 function unregister() { |
| 2404 if (contains(document.body, d.wrapper)) setTimeout(unregister, 5000); |
| 2405 else off(window, "resize", onResize); |
| 2406 } |
| 2407 setTimeout(unregister, 5000); |
| 2408 |
| 2409 on(d.input, "keyup", operation(cm, onKeyUp)); |
| 2410 on(d.input, "input", function() { |
| 2411 if (ie && !ie_upto8 && cm.display.inputHasSelection) cm.display.inputHasSe
lection = null; |
| 2412 fastPoll(cm); |
| 2413 }); |
| 2414 on(d.input, "keydown", operation(cm, onKeyDown)); |
| 2415 on(d.input, "keypress", operation(cm, onKeyPress)); |
| 2416 on(d.input, "focus", bind(onFocus, cm)); |
| 2417 on(d.input, "blur", bind(onBlur, cm)); |
| 2418 |
| 2419 function drag_(e) { |
| 2420 if (!signalDOMEvent(cm, e)) e_stop(e); |
| 2421 } |
| 2422 if (cm.options.dragDrop) { |
| 2423 on(d.scroller, "dragstart", function(e){onDragStart(cm, e);}); |
| 2424 on(d.scroller, "dragenter", drag_); |
| 2425 on(d.scroller, "dragover", drag_); |
| 2426 on(d.scroller, "drop", operation(cm, onDrop)); |
| 2427 } |
| 2428 on(d.scroller, "paste", function(e) { |
| 2429 if (eventInWidget(d, e)) return; |
| 2430 cm.state.pasteIncoming = true; |
| 2431 focusInput(cm); |
| 2432 fastPoll(cm); |
| 2433 }); |
| 2434 on(d.input, "paste", function() { |
| 2435 // Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206 |
| 2436 // Add a char to the end of textarea before paste occur so that |
| 2437 // selection doesn't span to the end of textarea. |
| 2438 if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleD
own < 200)) { |
| 2439 var start = d.input.selectionStart, end = d.input.selectionEnd; |
| 2440 d.input.value += "$"; |
| 2441 d.input.selectionStart = start; |
| 2442 d.input.selectionEnd = end; |
| 2443 cm.state.fakedLastChar = true; |
| 2444 } |
| 2445 cm.state.pasteIncoming = true; |
| 2446 fastPoll(cm); |
| 2447 }); |
| 2448 |
| 2449 function prepareCopyCut(e) { |
| 2450 if (cm.somethingSelected()) { |
| 2451 if (d.inaccurateSelection) { |
| 2452 d.prevInput = ""; |
| 2453 d.inaccurateSelection = false; |
| 2454 d.input.value = cm.getSelection(); |
| 2455 selectInput(d.input); |
| 2456 } |
| 2457 } else { |
| 2458 var text = "", ranges = []; |
| 2459 for (var i = 0; i < cm.doc.sel.ranges.length; i++) { |
| 2460 var line = cm.doc.sel.ranges[i].head.line; |
| 2461 var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}; |
| 2462 ranges.push(lineRange); |
| 2463 text += cm.getRange(lineRange.anchor, lineRange.head); |
| 2464 } |
| 2465 if (e.type == "cut") { |
| 2466 cm.setSelections(ranges, null, sel_dontScroll); |
| 2467 } else { |
| 2468 d.prevInput = ""; |
| 2469 d.input.value = text; |
| 2470 selectInput(d.input); |
| 2471 } |
| 2472 } |
| 2473 if (e.type == "cut") cm.state.cutIncoming = true; |
| 2474 } |
| 2475 on(d.input, "cut", prepareCopyCut); |
| 2476 on(d.input, "copy", prepareCopyCut); |
| 2477 |
| 2478 // Needed to handle Tab key in KHTML |
| 2479 if (khtml) on(d.sizer, "mouseup", function() { |
| 2480 if (activeElt() == d.input) d.input.blur(); |
| 2481 focusInput(cm); |
| 2482 }); |
| 2483 } |
| 2484 |
| 2485 // MOUSE EVENTS |
| 2486 |
| 2487 // Return true when the given mouse event happened in a widget |
| 2488 function eventInWidget(display, e) { |
| 2489 for (var n = e_target(e); n != display.wrapper; n = n.parentNode) { |
| 2490 if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.
mover) return true; |
| 2491 } |
| 2492 } |
| 2493 |
| 2494 // Given a mouse event, find the corresponding position. If liberal |
| 2495 // is false, it checks whether a gutter or scrollbar was clicked, |
| 2496 // and returns null if it was. forRect is used by rectangular |
| 2497 // selections, and tries to estimate a character position even for |
| 2498 // coordinates beyond the right of the text. |
| 2499 function posFromMouse(cm, e, liberal, forRect) { |
| 2500 var display = cm.display; |
| 2501 if (!liberal) { |
| 2502 var target = e_target(e); |
| 2503 if (target == display.scrollbarH || target == display.scrollbarV || |
| 2504 target == display.scrollbarFiller || target == display.gutterFiller) r
eturn null; |
| 2505 } |
| 2506 var x, y, space = display.lineSpace.getBoundingClientRect(); |
| 2507 // Fails unpredictably on IE[67] when mouse is dragged around quickly. |
| 2508 try { x = e.clientX - space.left; y = e.clientY - space.top; } |
| 2509 catch (e) { return null; } |
| 2510 var coords = coordsChar(cm, x, y), line; |
| 2511 if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text
).length == coords.ch) { |
| 2512 var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.le
ngth; |
| 2513 coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display)
.left) / charWidth(cm.display)) - colDiff)); |
| 2514 } |
| 2515 return coords; |
| 2516 } |
| 2517 |
| 2518 // A mouse down can be a single click, double click, triple click, |
| 2519 // start of selection drag, start of text drag, new cursor |
| 2520 // (ctrl-click), rectangle drag (alt-drag), or xwin |
| 2521 // middle-click-paste. Or it might be a click on something we should |
| 2522 // not interfere with, such as a scrollbar or widget. |
| 2523 function onMouseDown(e) { |
| 2524 if (signalDOMEvent(this, e)) return; |
| 2525 var cm = this, display = cm.display; |
| 2526 display.shift = e.shiftKey; |
| 2527 |
| 2528 if (eventInWidget(display, e)) { |
| 2529 if (!webkit) { |
| 2530 // Briefly turn off draggability, to allow widgets to do |
| 2531 // normal dragging things. |
| 2532 display.scroller.draggable = false; |
| 2533 setTimeout(function(){display.scroller.draggable = true;}, 100); |
| 2534 } |
| 2535 return; |
| 2536 } |
| 2537 if (clickInGutter(cm, e)) return; |
| 2538 var start = posFromMouse(cm, e); |
| 2539 window.focus(); |
| 2540 |
| 2541 switch (e_button(e)) { |
| 2542 case 1: |
| 2543 if (start) |
| 2544 leftButtonDown(cm, e, start); |
| 2545 else if (e_target(e) == display.scroller) |
| 2546 e_preventDefault(e); |
| 2547 break; |
| 2548 case 2: |
| 2549 if (webkit) cm.state.lastMiddleDown = +new Date; |
| 2550 if (start) extendSelection(cm.doc, start); |
| 2551 setTimeout(bind(focusInput, cm), 20); |
| 2552 e_preventDefault(e); |
| 2553 break; |
| 2554 case 3: |
| 2555 if (captureRightClick) onContextMenu(cm, e); |
| 2556 break; |
| 2557 } |
| 2558 } |
| 2559 |
| 2560 var lastClick, lastDoubleClick; |
| 2561 function leftButtonDown(cm, e, start) { |
| 2562 setTimeout(bind(ensureFocus, cm), 0); |
| 2563 |
| 2564 var now = +new Date, type; |
| 2565 if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleCli
ck.pos, start) == 0) { |
| 2566 type = "triple"; |
| 2567 } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, sta
rt) == 0) { |
| 2568 type = "double"; |
| 2569 lastDoubleClick = {time: now, pos: start}; |
| 2570 } else { |
| 2571 type = "single"; |
| 2572 lastClick = {time: now, pos: start}; |
| 2573 } |
| 2574 |
| 2575 var sel = cm.doc.sel, addNew = mac ? e.metaKey : e.ctrlKey; |
| 2576 if (cm.options.dragDrop && dragAndDrop && !addNew && !isReadOnly(cm) && |
| 2577 type == "single" && sel.contains(start) > -1 && sel.somethingSelected()) |
| 2578 leftButtonStartDrag(cm, e, start); |
| 2579 else |
| 2580 leftButtonSelect(cm, e, start, type, addNew); |
| 2581 } |
| 2582 |
| 2583 // Start a text drag. When it ends, see if any dragging actually |
| 2584 // happen, and treat as a click if it didn't. |
| 2585 function leftButtonStartDrag(cm, e, start) { |
| 2586 var display = cm.display; |
| 2587 var dragEnd = operation(cm, function(e2) { |
| 2588 if (webkit) display.scroller.draggable = false; |
| 2589 cm.state.draggingText = false; |
| 2590 off(document, "mouseup", dragEnd); |
| 2591 off(display.scroller, "drop", dragEnd); |
| 2592 if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) <
10) { |
| 2593 e_preventDefault(e2); |
| 2594 extendSelection(cm.doc, start); |
| 2595 focusInput(cm); |
| 2596 // Work around unexplainable focus problem in IE9 (#2127) |
| 2597 if (ie_upto10 && !ie_upto8) |
| 2598 setTimeout(function() {document.body.focus(); focusInput(cm);}, 20); |
| 2599 } |
| 2600 }); |
| 2601 // Let the drag handler handle this. |
| 2602 if (webkit) display.scroller.draggable = true; |
| 2603 cm.state.draggingText = dragEnd; |
| 2604 // IE's approach to draggable |
| 2605 if (display.scroller.dragDrop) display.scroller.dragDrop(); |
| 2606 on(document, "mouseup", dragEnd); |
| 2607 on(display.scroller, "drop", dragEnd); |
| 2608 } |
| 2609 |
| 2610 // Normal selection, as opposed to text dragging. |
| 2611 function leftButtonSelect(cm, e, start, type, addNew) { |
| 2612 var display = cm.display, doc = cm.doc; |
| 2613 e_preventDefault(e); |
| 2614 |
| 2615 var ourRange, ourIndex, startSel = doc.sel; |
| 2616 if (addNew && !e.shiftKey) { |
| 2617 ourIndex = doc.sel.contains(start); |
| 2618 if (ourIndex > -1) |
| 2619 ourRange = doc.sel.ranges[ourIndex]; |
| 2620 else |
| 2621 ourRange = new Range(start, start); |
| 2622 } else { |
| 2623 ourRange = doc.sel.primary(); |
| 2624 } |
| 2625 |
| 2626 if (e.altKey) { |
| 2627 type = "rect"; |
| 2628 if (!addNew) ourRange = new Range(start, start); |
| 2629 start = posFromMouse(cm, e, true, true); |
| 2630 ourIndex = -1; |
| 2631 } else if (type == "double") { |
| 2632 var word = findWordAt(doc, start); |
| 2633 if (cm.display.shift || doc.extend) |
| 2634 ourRange = extendRange(doc, ourRange, word.anchor, word.head); |
| 2635 else |
| 2636 ourRange = word; |
| 2637 } else if (type == "triple") { |
| 2638 var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1,
0))); |
| 2639 if (cm.display.shift || doc.extend) |
| 2640 ourRange = extendRange(doc, ourRange, line.anchor, line.head); |
| 2641 else |
| 2642 ourRange = line; |
| 2643 } else { |
| 2644 ourRange = extendRange(doc, ourRange, start); |
| 2645 } |
| 2646 |
| 2647 if (!addNew) { |
| 2648 ourIndex = 0; |
| 2649 setSelection(doc, new Selection([ourRange], 0), sel_mouse); |
| 2650 startSel = doc.sel; |
| 2651 } else if (ourIndex > -1) { |
| 2652 replaceOneSelection(doc, ourIndex, ourRange, sel_mouse); |
| 2653 } else { |
| 2654 ourIndex = doc.sel.ranges.length; |
| 2655 setSelection(doc, normalizeSelection(doc.sel.ranges.concat([ourRange]), ou
rIndex), |
| 2656 {scroll: false, origin: "*mouse"}); |
| 2657 } |
| 2658 |
| 2659 var lastPos = start; |
| 2660 function extendTo(pos) { |
| 2661 if (cmp(lastPos, pos) == 0) return; |
| 2662 lastPos = pos; |
| 2663 |
| 2664 if (type == "rect") { |
| 2665 var ranges = [], tabSize = cm.options.tabSize; |
| 2666 var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabS
ize); |
| 2667 var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize); |
| 2668 var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol
); |
| 2669 for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLi
ne(), Math.max(start.line, pos.line)); |
| 2670 line <= end; line++) { |
| 2671 var text = getLine(doc, line).text, leftPos = findColumn(text, left, t
abSize); |
| 2672 if (left == right) |
| 2673 ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); |
| 2674 else if (text.length > leftPos) |
| 2675 ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text,
right, tabSize)))); |
| 2676 } |
| 2677 if (!ranges.length) ranges.push(new Range(start, start)); |
| 2678 setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).
concat(ranges), ourIndex), sel_mouse); |
| 2679 } else { |
| 2680 var oldRange = ourRange; |
| 2681 var anchor = oldRange.anchor, head = pos; |
| 2682 if (type != "single") { |
| 2683 if (type == "double") |
| 2684 var range = findWordAt(doc, pos); |
| 2685 else |
| 2686 var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line +
1, 0))); |
| 2687 if (cmp(range.anchor, anchor) > 0) { |
| 2688 head = range.head; |
| 2689 anchor = minPos(oldRange.from(), range.anchor); |
| 2690 } else { |
| 2691 head = range.anchor; |
| 2692 anchor = maxPos(oldRange.to(), range.head); |
| 2693 } |
| 2694 } |
| 2695 var ranges = startSel.ranges.slice(0); |
| 2696 ranges[ourIndex] = new Range(clipPos(doc, anchor), head); |
| 2697 setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse); |
| 2698 } |
| 2699 } |
| 2700 |
| 2701 var editorSize = display.wrapper.getBoundingClientRect(); |
| 2702 // Used to ensure timeout re-tries don't fire when another extend |
| 2703 // happened in the meantime (clearTimeout isn't reliable -- at |
| 2704 // least on Chrome, the timeouts still happen even when cleared, |
| 2705 // if the clear happens after their scheduled firing time). |
| 2706 var counter = 0; |
| 2707 |
| 2708 function extend(e) { |
| 2709 var curCount = ++counter; |
| 2710 var cur = posFromMouse(cm, e, true, type == "rect"); |
| 2711 if (!cur) return; |
| 2712 if (cmp(cur, lastPos) != 0) { |
| 2713 ensureFocus(cm); |
| 2714 extendTo(cur); |
| 2715 var visible = visibleLines(display, doc); |
| 2716 if (cur.line >= visible.to || cur.line < visible.from) |
| 2717 setTimeout(operation(cm, function(){if (counter == curCount) extend(e)
;}), 150); |
| 2718 } else { |
| 2719 var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.
bottom ? 20 : 0; |
| 2720 if (outside) setTimeout(operation(cm, function() { |
| 2721 if (counter != curCount) return; |
| 2722 display.scroller.scrollTop += outside; |
| 2723 extend(e); |
| 2724 }), 50); |
| 2725 } |
| 2726 } |
| 2727 |
| 2728 function done(e) { |
| 2729 counter = Infinity; |
| 2730 e_preventDefault(e); |
| 2731 focusInput(cm); |
| 2732 off(document, "mousemove", move); |
| 2733 off(document, "mouseup", up); |
| 2734 doc.history.lastSelOrigin = null; |
| 2735 } |
| 2736 |
| 2737 var move = operation(cm, function(e) { |
| 2738 if ((ie && !ie_upto9) ? !e.buttons : !e_button(e)) done(e); |
| 2739 else extend(e); |
| 2740 }); |
| 2741 var up = operation(cm, done); |
| 2742 on(document, "mousemove", move); |
| 2743 on(document, "mouseup", up); |
| 2744 } |
| 2745 |
| 2746 // Determines whether an event happened in the gutter, and fires the |
| 2747 // handlers for the corresponding event. |
| 2748 function gutterEvent(cm, e, type, prevent, signalfn) { |
| 2749 try { var mX = e.clientX, mY = e.clientY; } |
| 2750 catch(e) { return false; } |
| 2751 if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) retu
rn false; |
| 2752 if (prevent) e_preventDefault(e); |
| 2753 |
| 2754 var display = cm.display; |
| 2755 var lineBox = display.lineDiv.getBoundingClientRect(); |
| 2756 |
| 2757 if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(
e); |
| 2758 mY -= lineBox.top - display.viewOffset; |
| 2759 |
| 2760 for (var i = 0; i < cm.options.gutters.length; ++i) { |
| 2761 var g = display.gutters.childNodes[i]; |
| 2762 if (g && g.getBoundingClientRect().right >= mX) { |
| 2763 var line = lineAtHeight(cm.doc, mY); |
| 2764 var gutter = cm.options.gutters[i]; |
| 2765 signalfn(cm, type, cm, line, gutter, e); |
| 2766 return e_defaultPrevented(e); |
| 2767 } |
| 2768 } |
| 2769 } |
| 2770 |
| 2771 function clickInGutter(cm, e) { |
| 2772 return gutterEvent(cm, e, "gutterClick", true, signalLater); |
| 2773 } |
| 2774 |
| 2775 // Kludge to work around strange IE behavior where it'll sometimes |
| 2776 // re-fire a series of drag-related events right after the drop (#1551) |
| 2777 var lastDrop = 0; |
| 2778 |
| 2779 function onDrop(e) { |
| 2780 var cm = this; |
| 2781 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) |
| 2782 return; |
| 2783 e_preventDefault(e); |
| 2784 if (ie) lastDrop = +new Date; |
| 2785 var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files; |
| 2786 if (!pos || isReadOnly(cm)) return; |
| 2787 // Might be a file drop, in which case we simply extract the text |
| 2788 // and insert it. |
| 2789 if (files && files.length && window.FileReader && window.File) { |
| 2790 var n = files.length, text = Array(n), read = 0; |
| 2791 var loadFile = function(file, i) { |
| 2792 var reader = new FileReader; |
| 2793 reader.onload = operation(cm, function() { |
| 2794 text[i] = reader.result; |
| 2795 if (++read == n) { |
| 2796 pos = clipPos(cm.doc, pos); |
| 2797 var change = {from: pos, to: pos, text: splitLines(text.join("\n")),
origin: "paste"}; |
| 2798 makeChange(cm.doc, change); |
| 2799 setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(ch
ange))); |
| 2800 } |
| 2801 }); |
| 2802 reader.readAsText(file); |
| 2803 }; |
| 2804 for (var i = 0; i < n; ++i) loadFile(files[i], i); |
| 2805 } else { // Normal drop |
| 2806 // Don't do a replace if the drop happened inside of the selected text. |
| 2807 if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) { |
| 2808 cm.state.draggingText(e); |
| 2809 // Ensure the editor is re-focused |
| 2810 setTimeout(bind(focusInput, cm), 20); |
| 2811 return; |
| 2812 } |
| 2813 try { |
| 2814 var text = e.dataTransfer.getData("Text"); |
| 2815 if (text) { |
| 2816 var selected = cm.state.draggingText && cm.listSelections(); |
| 2817 setSelectionNoUndo(cm.doc, simpleSelection(pos, pos)); |
| 2818 if (selected) for (var i = 0; i < selected.length; ++i) |
| 2819 replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag
"); |
| 2820 cm.replaceSelection(text, "around", "paste"); |
| 2821 focusInput(cm); |
| 2822 } |
| 2823 } |
| 2824 catch(e){} |
| 2825 } |
| 2826 } |
| 2827 |
| 2828 function onDragStart(cm, e) { |
| 2829 if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e
); return; } |
| 2830 if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; |
| 2831 |
| 2832 e.dataTransfer.setData("Text", cm.getSelection()); |
| 2833 |
| 2834 // Use dummy image instead of default browsers image. |
| 2835 // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so
we don't do it there. |
| 2836 if (e.dataTransfer.setDragImage && !safari) { |
| 2837 var img = elt("img", null, null, "position: fixed; left: 0; top: 0;"); |
| 2838 img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAA
AICTAEAOw=="; |
| 2839 if (presto) { |
| 2840 img.width = img.height = 1; |
| 2841 cm.display.wrapper.appendChild(img); |
| 2842 // Force a relayout, or Opera won't use our image for some obscure reaso
n |
| 2843 img._top = img.offsetTop; |
| 2844 } |
| 2845 e.dataTransfer.setDragImage(img, 0, 0); |
| 2846 if (presto) img.parentNode.removeChild(img); |
| 2847 } |
| 2848 } |
| 2849 |
| 2850 // SCROLL EVENTS |
| 2851 |
| 2852 // Sync the scrollable area and scrollbars, ensure the viewport |
| 2853 // covers the visible area. |
| 2854 function setScrollTop(cm, val) { |
| 2855 if (Math.abs(cm.doc.scrollTop - val) < 2) return; |
| 2856 cm.doc.scrollTop = val; |
| 2857 if (!gecko) updateDisplay(cm, {top: val}); |
| 2858 if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = va
l; |
| 2859 if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop
= val; |
| 2860 if (gecko) updateDisplay(cm); |
| 2861 startWorker(cm, 100); |
| 2862 } |
| 2863 // Sync scroller and scrollbar, ensure the gutter elements are |
| 2864 // aligned. |
| 2865 function setScrollLeft(cm, val, isScroller) { |
| 2866 if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val
) < 2) return; |
| 2867 val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.cl
ientWidth); |
| 2868 cm.doc.scrollLeft = val; |
| 2869 alignHorizontally(cm); |
| 2870 if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft =
val; |
| 2871 if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLef
t = val; |
| 2872 } |
| 2873 |
| 2874 // Since the delta values reported on mouse wheel events are |
| 2875 // unstandardized between browsers and even browser versions, and |
| 2876 // generally horribly unpredictable, this code starts by measuring |
| 2877 // the scroll effect that the first few mouse wheel events have, |
| 2878 // and, from that, detects the way it can convert deltas to pixel |
| 2879 // offsets afterwards. |
| 2880 // |
| 2881 // The reason we want to know the amount a wheel event will scroll |
| 2882 // is that it gives us a chance to update the display before the |
| 2883 // actual scrolling happens, reducing flickering. |
| 2884 |
| 2885 var wheelSamples = 0, wheelPixelsPerUnit = null; |
| 2886 // Fill in a browser-detected starting value on browsers where we |
| 2887 // know one. These don't have to be accurate -- the result of them |
| 2888 // being wrong would just be a slight flicker on the first wheel |
| 2889 // scroll (if it is large enough). |
| 2890 if (ie) wheelPixelsPerUnit = -.53; |
| 2891 else if (gecko) wheelPixelsPerUnit = 15; |
| 2892 else if (chrome) wheelPixelsPerUnit = -.7; |
| 2893 else if (safari) wheelPixelsPerUnit = -1/3; |
| 2894 |
| 2895 function onScrollWheel(cm, e) { |
| 2896 var dx = e.wheelDeltaX, dy = e.wheelDeltaY; |
| 2897 if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail; |
| 2898 if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail; |
| 2899 else if (dy == null) dy = e.wheelDelta; |
| 2900 |
| 2901 var display = cm.display, scroll = display.scroller; |
| 2902 // Quit if there's nothing to scroll here |
| 2903 if (!(dx && scroll.scrollWidth > scroll.clientWidth || |
| 2904 dy && scroll.scrollHeight > scroll.clientHeight)) return; |
| 2905 |
| 2906 // Webkit browsers on OS X abort momentum scrolls when the target |
| 2907 // of the scroll event is removed from the scrollable element. |
| 2908 // This hack (see related code in patchDisplay) makes sure the |
| 2909 // element is kept around. |
| 2910 if (dy && mac && webkit) { |
| 2911 outer: for (var cur = e.target, view = display.view; cur != scroll; cur =
cur.parentNode) { |
| 2912 for (var i = 0; i < view.length; i++) { |
| 2913 if (view[i].node == cur) { |
| 2914 cm.display.currentWheelTarget = cur; |
| 2915 break outer; |
| 2916 } |
| 2917 } |
| 2918 } |
| 2919 } |
| 2920 |
| 2921 // On some browsers, horizontal scrolling will cause redraws to |
| 2922 // happen before the gutter has been realigned, causing it to |
| 2923 // wriggle around in a most unseemly way. When we have an |
| 2924 // estimated pixels/delta value, we just handle horizontal |
| 2925 // scrolling entirely here. It'll be slightly off from native, but |
| 2926 // better than glitching out. |
| 2927 if (dx && !gecko && !presto && wheelPixelsPerUnit != null) { |
| 2928 if (dy) |
| 2929 setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixel
sPerUnit, scroll.scrollHeight - scroll.clientHeight))); |
| 2930 setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixel
sPerUnit, scroll.scrollWidth - scroll.clientWidth))); |
| 2931 e_preventDefault(e); |
| 2932 display.wheelStartX = null; // Abort measurement, if in progress |
| 2933 return; |
| 2934 } |
| 2935 |
| 2936 // 'Project' the visible viewport to cover the area that is being |
| 2937 // scrolled into view (if we know enough to estimate it). |
| 2938 if (dy && wheelPixelsPerUnit != null) { |
| 2939 var pixels = dy * wheelPixelsPerUnit; |
| 2940 var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight; |
| 2941 if (pixels < 0) top = Math.max(0, top + pixels - 50); |
| 2942 else bot = Math.min(cm.doc.height, bot + pixels + 50); |
| 2943 updateDisplay(cm, {top: top, bottom: bot}); |
| 2944 } |
| 2945 |
| 2946 if (wheelSamples < 20) { |
| 2947 if (display.wheelStartX == null) { |
| 2948 display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.sc
rollTop; |
| 2949 display.wheelDX = dx; display.wheelDY = dy; |
| 2950 setTimeout(function() { |
| 2951 if (display.wheelStartX == null) return; |
| 2952 var movedX = scroll.scrollLeft - display.wheelStartX; |
| 2953 var movedY = scroll.scrollTop - display.wheelStartY; |
| 2954 var sample = (movedY && display.wheelDY && movedY / display.wheelDY) |
| |
| 2955 (movedX && display.wheelDX && movedX / display.wheelDX); |
| 2956 display.wheelStartX = display.wheelStartY = null; |
| 2957 if (!sample) return; |
| 2958 wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (w
heelSamples + 1); |
| 2959 ++wheelSamples; |
| 2960 }, 200); |
| 2961 } else { |
| 2962 display.wheelDX += dx; display.wheelDY += dy; |
| 2963 } |
| 2964 } |
| 2965 } |
| 2966 |
| 2967 // KEY EVENTS |
| 2968 |
| 2969 // Run a handler that was bound to a key. |
| 2970 function doHandleBinding(cm, bound, dropShift) { |
| 2971 if (typeof bound == "string") { |
| 2972 bound = commands[bound]; |
| 2973 if (!bound) return false; |
| 2974 } |
| 2975 // Ensure previous input has been read, so that the handler sees a |
| 2976 // consistent view of the document |
| 2977 if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false; |
| 2978 var prevShift = cm.display.shift, done = false; |
| 2979 try { |
| 2980 if (isReadOnly(cm)) cm.state.suppressEdits = true; |
| 2981 if (dropShift) cm.display.shift = false; |
| 2982 done = bound(cm) != Pass; |
| 2983 } finally { |
| 2984 cm.display.shift = prevShift; |
| 2985 cm.state.suppressEdits = false; |
| 2986 } |
| 2987 return done; |
| 2988 } |
| 2989 |
| 2990 // Collect the currently active keymaps. |
| 2991 function allKeyMaps(cm) { |
| 2992 var maps = cm.state.keyMaps.slice(0); |
| 2993 if (cm.options.extraKeys) maps.push(cm.options.extraKeys); |
| 2994 maps.push(cm.options.keyMap); |
| 2995 return maps; |
| 2996 } |
| 2997 |
| 2998 var maybeTransition; |
| 2999 // Handle a key from the keydown event. |
| 3000 function handleKeyBinding(cm, e) { |
| 3001 // Handle automatic keymap transitions |
| 3002 var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto; |
| 3003 clearTimeout(maybeTransition); |
| 3004 if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() { |
| 3005 if (getKeyMap(cm.options.keyMap) == startMap) { |
| 3006 cm.options.keyMap = (next.call ? next.call(null, cm) : next); |
| 3007 keyMapChanged(cm); |
| 3008 } |
| 3009 }, 50); |
| 3010 |
| 3011 var name = keyName(e, true), handled = false; |
| 3012 if (!name) return false; |
| 3013 var keymaps = allKeyMaps(cm); |
| 3014 |
| 3015 if (e.shiftKey) { |
| 3016 // First try to resolve full name (including 'Shift-'). Failing |
| 3017 // that, see if there is a cursor-motion command (starting with |
| 3018 // 'go') bound to the keyname without 'Shift-'. |
| 3019 handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandle
Binding(cm, b, true);}) |
| 3020 || lookupKey(name, keymaps, function(b) { |
| 3021 if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion) |
| 3022 return doHandleBinding(cm, b); |
| 3023 }); |
| 3024 } else { |
| 3025 handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm
, b); }); |
| 3026 } |
| 3027 |
| 3028 if (handled) { |
| 3029 e_preventDefault(e); |
| 3030 restartBlink(cm); |
| 3031 signalLater(cm, "keyHandled", cm, name, e); |
| 3032 } |
| 3033 return handled; |
| 3034 } |
| 3035 |
| 3036 // Handle a key from the keypress event |
| 3037 function handleCharBinding(cm, e, ch) { |
| 3038 var handled = lookupKey("'" + ch + "'", allKeyMaps(cm), |
| 3039 function(b) { return doHandleBinding(cm, b, true); }
); |
| 3040 if (handled) { |
| 3041 e_preventDefault(e); |
| 3042 restartBlink(cm); |
| 3043 signalLater(cm, "keyHandled", cm, "'" + ch + "'", e); |
| 3044 } |
| 3045 return handled; |
| 3046 } |
| 3047 |
| 3048 var lastStoppedKey = null; |
| 3049 function onKeyDown(e) { |
| 3050 var cm = this; |
| 3051 ensureFocus(cm); |
| 3052 if (signalDOMEvent(cm, e)) return; |
| 3053 // IE does strange things with escape. |
| 3054 if (ie_upto10 && e.keyCode == 27) e.returnValue = false; |
| 3055 var code = e.keyCode; |
| 3056 cm.display.shift = code == 16 || e.shiftKey; |
| 3057 var handled = handleKeyBinding(cm, e); |
| 3058 if (presto) { |
| 3059 lastStoppedKey = handled ? code : null; |
| 3060 // Opera has no cut event... we try to at least catch the key combo |
| 3061 if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKe
y)) |
| 3062 cm.replaceSelection("", null, "cut"); |
| 3063 } |
| 3064 |
| 3065 // Turn mouse into crosshair when Alt is held on Mac. |
| 3066 if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.classN
ame)) |
| 3067 showCrossHair(cm); |
| 3068 } |
| 3069 |
| 3070 function showCrossHair(cm) { |
| 3071 var lineDiv = cm.display.lineDiv; |
| 3072 addClass(lineDiv, "CodeMirror-crosshair"); |
| 3073 |
| 3074 function up(e) { |
| 3075 if (e.keyCode == 18 || !e.altKey) { |
| 3076 rmClass(lineDiv, "CodeMirror-crosshair"); |
| 3077 off(document, "keyup", up); |
| 3078 off(document, "mouseover", up); |
| 3079 } |
| 3080 } |
| 3081 on(document, "keyup", up); |
| 3082 on(document, "mouseover", up); |
| 3083 } |
| 3084 |
| 3085 function onKeyUp(e) { |
| 3086 if (signalDOMEvent(this, e)) return; |
| 3087 if (e.keyCode == 16) this.doc.sel.shift = false; |
| 3088 } |
| 3089 |
| 3090 function onKeyPress(e) { |
| 3091 var cm = this; |
| 3092 if (signalDOMEvent(cm, e)) return; |
| 3093 var keyCode = e.keyCode, charCode = e.charCode; |
| 3094 if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDe
fault(e); return;} |
| 3095 if (((presto && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm
, e)) return; |
| 3096 var ch = String.fromCharCode(charCode == null ? keyCode : charCode); |
| 3097 if (handleCharBinding(cm, e, ch)) return; |
| 3098 if (ie && !ie_upto8) cm.display.inputHasSelection = null; |
| 3099 fastPoll(cm); |
| 3100 } |
| 3101 |
| 3102 // FOCUS/BLUR EVENTS |
| 3103 |
| 3104 function onFocus(cm) { |
| 3105 if (cm.options.readOnly == "nocursor") return; |
| 3106 if (!cm.state.focused) { |
| 3107 signal(cm, "focus", cm); |
| 3108 cm.state.focused = true; |
| 3109 addClass(cm.display.wrapper, "CodeMirror-focused"); |
| 3110 // The prevInput test prevents this from firing when a context |
| 3111 // menu is closed (since the resetInput would kill the |
| 3112 // select-all detection hack) |
| 3113 if (!cm.curOp && cm.display.selForContextMenu == cm.doc.sel) { |
| 3114 resetInput(cm); |
| 3115 if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730 |
| 3116 } |
| 3117 } |
| 3118 slowPoll(cm); |
| 3119 restartBlink(cm); |
| 3120 } |
| 3121 function onBlur(cm) { |
| 3122 if (cm.state.focused) { |
| 3123 signal(cm, "blur", cm); |
| 3124 cm.state.focused = false; |
| 3125 rmClass(cm.display.wrapper, "CodeMirror-focused"); |
| 3126 } |
| 3127 clearInterval(cm.display.blinker); |
| 3128 setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 15
0); |
| 3129 } |
| 3130 |
| 3131 // CONTEXT MENU HANDLING |
| 3132 |
| 3133 var detectingSelectAll; |
| 3134 // To make the context menu work, we need to briefly unhide the |
| 3135 // textarea (making it as unobtrusive as possible) to let the |
| 3136 // right-click take effect on it. |
| 3137 function onContextMenu(cm, e) { |
| 3138 if (signalDOMEvent(cm, e, "contextmenu")) return; |
| 3139 var display = cm.display; |
| 3140 if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return; |
| 3141 |
| 3142 var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop; |
| 3143 if (!pos || presto) return; // Opera is difficult. |
| 3144 |
| 3145 // Reset the current text selection only if the click is done outside of the
selection |
| 3146 // and 'resetSelectionOnContextMenu' option is true. |
| 3147 var reset = cm.options.resetSelectionOnContextMenu; |
| 3148 if (reset && cm.doc.sel.contains(pos) == -1) |
| 3149 operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); |
| 3150 |
| 3151 var oldCSS = display.input.style.cssText; |
| 3152 display.inputDiv.style.position = "absolute"; |
| 3153 display.input.style.cssText = "position: fixed; width: 30px; height: 30px; t
op: " + (e.clientY - 5) + |
| 3154 "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: " + |
| 3155 (ie ? "rgba(255, 255, 255, .05)" : "transparent") + |
| 3156 "; outline: none; border-width: 0; outline: none; overflow: hidden; opacit
y: .05; filter: alpha(opacity=5);"; |
| 3157 focusInput(cm); |
| 3158 resetInput(cm); |
| 3159 // Adds "Select all" to context menu in FF |
| 3160 if (!cm.somethingSelected()) display.input.value = display.prevInput = " "; |
| 3161 display.selForContextMenu = cm.doc.sel; |
| 3162 |
| 3163 // Select-all will be greyed out if there's nothing to select, so |
| 3164 // this adds a zero-width space so that we can later check whether |
| 3165 // it got selected. |
| 3166 function prepareSelectAllHack() { |
| 3167 if (display.input.selectionStart != null) { |
| 3168 var selected = cm.somethingSelected(); |
| 3169 var extval = display.input.value = "\u200b" + (selected ? display.input.
value : ""); |
| 3170 display.prevInput = selected ? "" : "\u200b"; |
| 3171 display.input.selectionStart = 1; display.input.selectionEnd = extval.le
ngth; |
| 3172 } |
| 3173 } |
| 3174 function rehide() { |
| 3175 display.inputDiv.style.position = "relative"; |
| 3176 display.input.style.cssText = oldCSS; |
| 3177 if (ie_upto8) display.scrollbarV.scrollTop = display.scroller.scrollTop =
scrollPos; |
| 3178 slowPoll(cm); |
| 3179 |
| 3180 // Try to detect the user choosing select-all |
| 3181 if (display.input.selectionStart != null) { |
| 3182 if (!ie || ie_upto8) prepareSelectAllHack(); |
| 3183 clearTimeout(detectingSelectAll); |
| 3184 var i = 0, poll = function() { |
| 3185 if (display.selForContextMenu == cm.doc.sel && display.input.selection
Start == 0) |
| 3186 operation(cm, commands.selectAll)(cm); |
| 3187 else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500); |
| 3188 else resetInput(cm); |
| 3189 }; |
| 3190 detectingSelectAll = setTimeout(poll, 200); |
| 3191 } |
| 3192 } |
| 3193 |
| 3194 if (ie && !ie_upto8) prepareSelectAllHack(); |
| 3195 if (captureRightClick) { |
| 3196 e_stop(e); |
| 3197 var mouseup = function() { |
| 3198 off(window, "mouseup", mouseup); |
| 3199 setTimeout(rehide, 20); |
| 3200 }; |
| 3201 on(window, "mouseup", mouseup); |
| 3202 } else { |
| 3203 setTimeout(rehide, 50); |
| 3204 } |
| 3205 } |
| 3206 |
| 3207 function contextMenuInGutter(cm, e) { |
| 3208 if (!hasHandler(cm, "gutterContextMenu")) return false; |
| 3209 return gutterEvent(cm, e, "gutterContextMenu", false, signal); |
| 3210 } |
| 3211 |
| 3212 // UPDATING |
| 3213 |
| 3214 // Compute the position of the end of a change (its 'to' property |
| 3215 // refers to the pre-change end). |
| 3216 var changeEnd = CodeMirror.changeEnd = function(change) { |
| 3217 if (!change.text) return change.to; |
| 3218 return Pos(change.from.line + change.text.length - 1, |
| 3219 lst(change.text).length + (change.text.length == 1 ? change.from.
ch : 0)); |
| 3220 }; |
| 3221 |
| 3222 // Adjust a position to refer to the post-change position of the |
| 3223 // same text, or the end of the change if the change covers it. |
| 3224 function adjustForChange(pos, change) { |
| 3225 if (cmp(pos, change.from) < 0) return pos; |
| 3226 if (cmp(pos, change.to) <= 0) return changeEnd(change); |
| 3227 |
| 3228 var line = pos.line + change.text.length - (change.to.line - change.from.lin
e) - 1, ch = pos.ch; |
| 3229 if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch; |
| 3230 return Pos(line, ch); |
| 3231 } |
| 3232 |
| 3233 function computeSelAfterChange(doc, change) { |
| 3234 var out = []; |
| 3235 for (var i = 0; i < doc.sel.ranges.length; i++) { |
| 3236 var range = doc.sel.ranges[i]; |
| 3237 out.push(new Range(adjustForChange(range.anchor, change), |
| 3238 adjustForChange(range.head, change))); |
| 3239 } |
| 3240 return normalizeSelection(out, doc.sel.primIndex); |
| 3241 } |
| 3242 |
| 3243 function offsetPos(pos, old, nw) { |
| 3244 if (pos.line == old.line) |
| 3245 return Pos(nw.line, pos.ch - old.ch + nw.ch); |
| 3246 else |
| 3247 return Pos(nw.line + (pos.line - old.line), pos.ch); |
| 3248 } |
| 3249 |
| 3250 // Used by replaceSelections to allow moving the selection to the |
| 3251 // start or around the replaced test. Hint may be "start" or "around". |
| 3252 function computeReplacedSel(doc, changes, hint) { |
| 3253 var out = []; |
| 3254 var oldPrev = Pos(doc.first, 0), newPrev = oldPrev; |
| 3255 for (var i = 0; i < changes.length; i++) { |
| 3256 var change = changes[i]; |
| 3257 var from = offsetPos(change.from, oldPrev, newPrev); |
| 3258 var to = offsetPos(changeEnd(change), oldPrev, newPrev); |
| 3259 oldPrev = change.to; |
| 3260 newPrev = to; |
| 3261 if (hint == "around") { |
| 3262 var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0; |
| 3263 out[i] = new Range(inv ? to : from, inv ? from : to); |
| 3264 } else { |
| 3265 out[i] = new Range(from, from); |
| 3266 } |
| 3267 } |
| 3268 return new Selection(out, doc.sel.primIndex); |
| 3269 } |
| 3270 |
| 3271 // Allow "beforeChange" event handlers to influence a change |
| 3272 function filterChange(doc, change, update) { |
| 3273 var obj = { |
| 3274 canceled: false, |
| 3275 from: change.from, |
| 3276 to: change.to, |
| 3277 text: change.text, |
| 3278 origin: change.origin, |
| 3279 cancel: function() { this.canceled = true; } |
| 3280 }; |
| 3281 if (update) obj.update = function(from, to, text, origin) { |
| 3282 if (from) this.from = clipPos(doc, from); |
| 3283 if (to) this.to = clipPos(doc, to); |
| 3284 if (text) this.text = text; |
| 3285 if (origin !== undefined) this.origin = origin; |
| 3286 }; |
| 3287 signal(doc, "beforeChange", doc, obj); |
| 3288 if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj); |
| 3289 |
| 3290 if (obj.canceled) return null; |
| 3291 return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}; |
| 3292 } |
| 3293 |
| 3294 // Apply a change to a document, and add it to the document's |
| 3295 // history, and propagating it to all linked documents. |
| 3296 function makeChange(doc, change, ignoreReadOnly) { |
| 3297 if (doc.cm) { |
| 3298 if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignor
eReadOnly); |
| 3299 if (doc.cm.state.suppressEdits) return; |
| 3300 } |
| 3301 |
| 3302 if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeC
hange")) { |
| 3303 change = filterChange(doc, change, true); |
| 3304 if (!change) return; |
| 3305 } |
| 3306 |
| 3307 // Possibly split or suppress the update based on the presence |
| 3308 // of read-only spans in its range. |
| 3309 var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc,
change.from, change.to); |
| 3310 if (split) { |
| 3311 for (var i = split.length - 1; i >= 0; --i) |
| 3312 makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? ["
"] : change.text}); |
| 3313 } else { |
| 3314 makeChangeInner(doc, change); |
| 3315 } |
| 3316 } |
| 3317 |
| 3318 function makeChangeInner(doc, change) { |
| 3319 if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, chan
ge.to) == 0) return; |
| 3320 var selAfter = computeSelAfterChange(doc, change); |
| 3321 addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN); |
| 3322 |
| 3323 makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, chang
e)); |
| 3324 var rebased = []; |
| 3325 |
| 3326 linkedDocs(doc, function(doc, sharedHist) { |
| 3327 if (!sharedHist && indexOf(rebased, doc.history) == -1) { |
| 3328 rebaseHist(doc.history, change); |
| 3329 rebased.push(doc.history); |
| 3330 } |
| 3331 makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change)
); |
| 3332 }); |
| 3333 } |
| 3334 |
| 3335 // Revert a change stored in a document's history. |
| 3336 function makeChangeFromHistory(doc, type, allowSelectionOnly) { |
| 3337 if (doc.cm && doc.cm.state.suppressEdits) return; |
| 3338 |
| 3339 var hist = doc.history, event, selAfter = doc.sel; |
| 3340 var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo"
? hist.undone : hist.done; |
| 3341 |
| 3342 // Verify that there is a useable event (so that ctrl-z won't |
| 3343 // needlessly clear selection events) |
| 3344 for (var i = 0; i < source.length; i++) { |
| 3345 event = source[i]; |
| 3346 if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.r
anges) |
| 3347 break; |
| 3348 } |
| 3349 if (i == source.length) return; |
| 3350 hist.lastOrigin = hist.lastSelOrigin = null; |
| 3351 |
| 3352 for (;;) { |
| 3353 event = source.pop(); |
| 3354 if (event.ranges) { |
| 3355 pushSelectionToHistory(event, dest); |
| 3356 if (allowSelectionOnly && !event.equals(doc.sel)) { |
| 3357 setSelection(doc, event, {clearRedo: false}); |
| 3358 return; |
| 3359 } |
| 3360 selAfter = event; |
| 3361 } |
| 3362 else break; |
| 3363 } |
| 3364 |
| 3365 // Build up a reverse change object to add to the opposite history |
| 3366 // stack (redo when undoing, and vice versa). |
| 3367 var antiChanges = []; |
| 3368 pushSelectionToHistory(selAfter, dest); |
| 3369 dest.push({changes: antiChanges, generation: hist.generation}); |
| 3370 hist.generation = event.generation || ++hist.maxGeneration; |
| 3371 |
| 3372 var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm,
"beforeChange"); |
| 3373 |
| 3374 for (var i = event.changes.length - 1; i >= 0; --i) { |
| 3375 var change = event.changes[i]; |
| 3376 change.origin = type; |
| 3377 if (filter && !filterChange(doc, change, false)) { |
| 3378 source.length = 0; |
| 3379 return; |
| 3380 } |
| 3381 |
| 3382 antiChanges.push(historyChangeFromChange(doc, change)); |
| 3383 |
| 3384 var after = i ? computeSelAfterChange(doc, change, null) : lst(source); |
| 3385 makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change)); |
| 3386 if (doc.cm) ensureCursorVisible(doc.cm); |
| 3387 var rebased = []; |
| 3388 |
| 3389 // Propagate to the linked documents |
| 3390 linkedDocs(doc, function(doc, sharedHist) { |
| 3391 if (!sharedHist && indexOf(rebased, doc.history) == -1) { |
| 3392 rebaseHist(doc.history, change); |
| 3393 rebased.push(doc.history); |
| 3394 } |
| 3395 makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change)); |
| 3396 }); |
| 3397 } |
| 3398 } |
| 3399 |
| 3400 // Sub-views need their line numbers shifted when text is added |
| 3401 // above or below them in the parent document. |
| 3402 function shiftDoc(doc, distance) { |
| 3403 doc.first += distance; |
| 3404 doc.sel = new Selection(map(doc.sel.ranges, function(range) { |
| 3405 return new Range(Pos(range.anchor.line + distance, range.anchor.ch), |
| 3406 Pos(range.head.line + distance, range.head.ch)); |
| 3407 }), doc.sel.primIndex); |
| 3408 if (doc.cm) regChange(doc.cm, doc.first, doc.first - distance, distance); |
| 3409 } |
| 3410 |
| 3411 // More lower-level change function, handling only a single document |
| 3412 // (not linked ones). |
| 3413 function makeChangeSingleDoc(doc, change, selAfter, spans) { |
| 3414 if (doc.cm && !doc.cm.curOp) |
| 3415 return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans
); |
| 3416 |
| 3417 if (change.to.line < doc.first) { |
| 3418 shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line)
); |
| 3419 return; |
| 3420 } |
| 3421 if (change.from.line > doc.lastLine()) return; |
| 3422 |
| 3423 // Clip the change to the size of this doc |
| 3424 if (change.from.line < doc.first) { |
| 3425 var shift = change.text.length - 1 - (doc.first - change.from.line); |
| 3426 shiftDoc(doc, shift); |
| 3427 change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.
to.ch), |
| 3428 text: [lst(change.text)], origin: change.origin}; |
| 3429 } |
| 3430 var last = doc.lastLine(); |
| 3431 if (change.to.line > last) { |
| 3432 change = {from: change.from, to: Pos(last, getLine(doc, last).text.length)
, |
| 3433 text: [change.text[0]], origin: change.origin}; |
| 3434 } |
| 3435 |
| 3436 change.removed = getBetween(doc, change.from, change.to); |
| 3437 |
| 3438 if (!selAfter) selAfter = computeSelAfterChange(doc, change, null); |
| 3439 if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans); |
| 3440 else updateDoc(doc, change, spans); |
| 3441 setSelectionNoUndo(doc, selAfter, sel_dontScroll); |
| 3442 } |
| 3443 |
| 3444 // Handle the interaction of a change to a document with the editor |
| 3445 // that this document is part of. |
| 3446 function makeChangeSingleDocInEditor(cm, change, spans) { |
| 3447 var doc = cm.doc, display = cm.display, from = change.from, to = change.to; |
| 3448 |
| 3449 var recomputeMaxLength = false, checkWidthStart = from.line; |
| 3450 if (!cm.options.lineWrapping) { |
| 3451 checkWidthStart = lineNo(visualLine(getLine(doc, from.line))); |
| 3452 doc.iter(checkWidthStart, to.line + 1, function(line) { |
| 3453 if (line == display.maxLine) { |
| 3454 recomputeMaxLength = true; |
| 3455 return true; |
| 3456 } |
| 3457 }); |
| 3458 } |
| 3459 |
| 3460 if (doc.sel.contains(change.from, change.to) > -1) |
| 3461 signalCursorActivity(cm); |
| 3462 |
| 3463 updateDoc(doc, change, spans, estimateHeight(cm)); |
| 3464 |
| 3465 if (!cm.options.lineWrapping) { |
| 3466 doc.iter(checkWidthStart, from.line + change.text.length, function(line) { |
| 3467 var len = lineLength(line); |
| 3468 if (len > display.maxLineLength) { |
| 3469 display.maxLine = line; |
| 3470 display.maxLineLength = len; |
| 3471 display.maxLineChanged = true; |
| 3472 recomputeMaxLength = false; |
| 3473 } |
| 3474 }); |
| 3475 if (recomputeMaxLength) cm.curOp.updateMaxLine = true; |
| 3476 } |
| 3477 |
| 3478 // Adjust frontier, schedule worker |
| 3479 doc.frontier = Math.min(doc.frontier, from.line); |
| 3480 startWorker(cm, 400); |
| 3481 |
| 3482 var lendiff = change.text.length - (to.line - from.line) - 1; |
| 3483 // Remember that these lines changed, for updating the display |
| 3484 if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm
.doc, change)) |
| 3485 regLineChange(cm, from.line, "text"); |
| 3486 else |
| 3487 regChange(cm, from.line, to.line + 1, lendiff); |
| 3488 |
| 3489 var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(c
m, "change"); |
| 3490 if (changeHandler || changesHandler) { |
| 3491 var obj = { |
| 3492 from: from, to: to, |
| 3493 text: change.text, |
| 3494 removed: change.removed, |
| 3495 origin: change.origin |
| 3496 }; |
| 3497 if (changeHandler) signalLater(cm, "change", cm, obj); |
| 3498 if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).pu
sh(obj); |
| 3499 } |
| 3500 } |
| 3501 |
| 3502 function replaceRange(doc, code, from, to, origin) { |
| 3503 if (!to) to = from; |
| 3504 if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; } |
| 3505 if (typeof code == "string") code = splitLines(code); |
| 3506 makeChange(doc, {from: from, to: to, text: code, origin: origin}); |
| 3507 } |
| 3508 |
| 3509 // SCROLLING THINGS INTO VIEW |
| 3510 |
| 3511 // If an editor sits on the top or bottom of the window, partially |
| 3512 // scrolled out of view, this ensures that the cursor is visible. |
| 3513 function maybeScrollWindow(cm, coords) { |
| 3514 var display = cm.display, box = display.sizer.getBoundingClientRect(), doScr
oll = null; |
| 3515 if (coords.top + box.top < 0) doScroll = true; |
| 3516 else if (coords.bottom + box.top > (window.innerHeight || document.documentE
lement.clientHeight)) doScroll = false; |
| 3517 if (doScroll != null && !phantom) { |
| 3518 var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " + |
| 3519 (coords.top - display.viewOffset - paddingTop(cm.disp
lay)) + "px; height: " + |
| 3520 (coords.bottom - coords.top + scrollerCutOff) + "px;
left: " + |
| 3521 coords.left + "px; width: 2px;"); |
| 3522 cm.display.lineSpace.appendChild(scrollNode); |
| 3523 scrollNode.scrollIntoView(doScroll); |
| 3524 cm.display.lineSpace.removeChild(scrollNode); |
| 3525 } |
| 3526 } |
| 3527 |
| 3528 // Scroll a given position into view (immediately), verifying that |
| 3529 // it actually became visible (as line heights are accurately |
| 3530 // measured, the position of something may 'drift' during drawing). |
| 3531 function scrollPosIntoView(cm, pos, end, margin) { |
| 3532 if (margin == null) margin = 0; |
| 3533 for (;;) { |
| 3534 var changed = false, coords = cursorCoords(cm, pos); |
| 3535 var endCoords = !end || end == pos ? coords : cursorCoords(cm, end); |
| 3536 var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.lef
t), |
| 3537 Math.min(coords.top, endCoords.top) - m
argin, |
| 3538 Math.max(coords.left, endCoords.left), |
| 3539 Math.max(coords.bottom, endCoords.botto
m) + margin); |
| 3540 var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft; |
| 3541 if (scrollPos.scrollTop != null) { |
| 3542 setScrollTop(cm, scrollPos.scrollTop); |
| 3543 if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true; |
| 3544 } |
| 3545 if (scrollPos.scrollLeft != null) { |
| 3546 setScrollLeft(cm, scrollPos.scrollLeft); |
| 3547 if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true; |
| 3548 } |
| 3549 if (!changed) return coords; |
| 3550 } |
| 3551 } |
| 3552 |
| 3553 // Scroll a given set of coordinates into view (immediately). |
| 3554 function scrollIntoView(cm, x1, y1, x2, y2) { |
| 3555 var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2); |
| 3556 if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop); |
| 3557 if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft); |
| 3558 } |
| 3559 |
| 3560 // Calculate a new scroll position needed to scroll the given |
| 3561 // rectangle into view. Returns an object with scrollTop and |
| 3562 // scrollLeft properties. When these are undefined, the |
| 3563 // vertical/horizontal position does not need to be adjusted. |
| 3564 function calculateScrollPos(cm, x1, y1, x2, y2) { |
| 3565 var display = cm.display, snapMargin = textHeight(cm.display); |
| 3566 if (y1 < 0) y1 = 0; |
| 3567 var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop
: display.scroller.scrollTop; |
| 3568 var screen = display.scroller.clientHeight - scrollerCutOff, result = {}; |
| 3569 var docBottom = cm.doc.height + paddingVert(display); |
| 3570 var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin; |
| 3571 if (y1 < screentop) { |
| 3572 result.scrollTop = atTop ? 0 : y1; |
| 3573 } else if (y2 > screentop + screen) { |
| 3574 var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen); |
| 3575 if (newTop != screentop) result.scrollTop = newTop; |
| 3576 } |
| 3577 |
| 3578 var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLe
ft : display.scroller.scrollLeft; |
| 3579 var screenw = display.scroller.clientWidth - scrollerCutOff; |
| 3580 x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth; |
| 3581 var gutterw = display.gutters.offsetWidth; |
| 3582 var atLeft = x1 < gutterw + 10; |
| 3583 if (x1 < screenleft + gutterw || atLeft) { |
| 3584 if (atLeft) x1 = 0; |
| 3585 result.scrollLeft = Math.max(0, x1 - 10 - gutterw); |
| 3586 } else if (x2 > screenw + screenleft - 3) { |
| 3587 result.scrollLeft = x2 + 10 - screenw; |
| 3588 } |
| 3589 return result; |
| 3590 } |
| 3591 |
| 3592 // Store a relative adjustment to the scroll position in the current |
| 3593 // operation (to be applied when the operation finishes). |
| 3594 function addToScrollPos(cm, left, top) { |
| 3595 if (left != null || top != null) resolveScrollToPos(cm); |
| 3596 if (left != null) |
| 3597 cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : c
m.curOp.scrollLeft) + left; |
| 3598 if (top != null) |
| 3599 cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.c
urOp.scrollTop) + top; |
| 3600 } |
| 3601 |
| 3602 // Make sure that at the end of the operation the current cursor is |
| 3603 // shown. |
| 3604 function ensureCursorVisible(cm) { |
| 3605 resolveScrollToPos(cm); |
| 3606 var cur = cm.getCursor(), from = cur, to = cur; |
| 3607 if (!cm.options.lineWrapping) { |
| 3608 from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur; |
| 3609 to = Pos(cur.line, cur.ch + 1); |
| 3610 } |
| 3611 cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollM
argin, isCursor: true}; |
| 3612 } |
| 3613 |
| 3614 // When an operation has its scrollToPos property set, and another |
| 3615 // scroll action is applied before the end of the operation, this |
| 3616 // 'simulates' scrolling that position into view in a cheap way, so |
| 3617 // that the effect of intermediate scroll commands is not ignored. |
| 3618 function resolveScrollToPos(cm) { |
| 3619 var range = cm.curOp.scrollToPos; |
| 3620 if (range) { |
| 3621 cm.curOp.scrollToPos = null; |
| 3622 var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.t
o); |
| 3623 var sPos = calculateScrollPos(cm, Math.min(from.left, to.left), |
| 3624 Math.min(from.top, to.top) - range.margin, |
| 3625 Math.max(from.right, to.right), |
| 3626 Math.max(from.bottom, to.bottom) + range.mar
gin); |
| 3627 cm.scrollTo(sPos.scrollLeft, sPos.scrollTop); |
| 3628 } |
| 3629 } |
| 3630 |
| 3631 // API UTILITIES |
| 3632 |
| 3633 // Indent the given line. The how parameter can be "smart", |
| 3634 // "add"/null, "subtract", or "prev". When aggressive is false |
| 3635 // (typically set to true for forced single-line indents), empty |
| 3636 // lines are not indented, and places where the mode returns Pass |
| 3637 // are left alone. |
| 3638 function indentLine(cm, n, how, aggressive) { |
| 3639 var doc = cm.doc, state; |
| 3640 if (how == null) how = "add"; |
| 3641 if (how == "smart") { |
| 3642 // Fall back to "prev" when the mode doesn't have an indentation |
| 3643 // method. |
| 3644 if (!cm.doc.mode.indent) how = "prev"; |
| 3645 else state = getStateBefore(cm, n); |
| 3646 } |
| 3647 |
| 3648 var tabSize = cm.options.tabSize; |
| 3649 var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize)
; |
| 3650 if (line.stateAfter) line.stateAfter = null; |
| 3651 var curSpaceString = line.text.match(/^\s*/)[0], indentation; |
| 3652 if (!aggressive && !/\S/.test(line.text)) { |
| 3653 indentation = 0; |
| 3654 how = "not"; |
| 3655 } else if (how == "smart") { |
| 3656 indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.len
gth), line.text); |
| 3657 if (indentation == Pass) { |
| 3658 if (!aggressive) return; |
| 3659 how = "prev"; |
| 3660 } |
| 3661 } |
| 3662 if (how == "prev") { |
| 3663 if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null,
tabSize); |
| 3664 else indentation = 0; |
| 3665 } else if (how == "add") { |
| 3666 indentation = curSpace + cm.options.indentUnit; |
| 3667 } else if (how == "subtract") { |
| 3668 indentation = curSpace - cm.options.indentUnit; |
| 3669 } else if (typeof how == "number") { |
| 3670 indentation = curSpace + how; |
| 3671 } |
| 3672 indentation = Math.max(0, indentation); |
| 3673 |
| 3674 var indentString = "", pos = 0; |
| 3675 if (cm.options.indentWithTabs) |
| 3676 for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; i
ndentString += "\t";} |
| 3677 if (pos < indentation) indentString += spaceStr(indentation - pos); |
| 3678 |
| 3679 if (indentString != curSpaceString) { |
| 3680 replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length
), "+input"); |
| 3681 } else { |
| 3682 // Ensure that, if the cursor was in the whitespace at the start |
| 3683 // of the line, it is moved to the end of that space. |
| 3684 for (var i = 0; i < doc.sel.ranges.length; i++) { |
| 3685 var range = doc.sel.ranges[i]; |
| 3686 if (range.head.line == n && range.head.ch < curSpaceString.length) { |
| 3687 var pos = Pos(n, curSpaceString.length); |
| 3688 replaceOneSelection(doc, i, new Range(pos, pos)); |
| 3689 break; |
| 3690 } |
| 3691 } |
| 3692 } |
| 3693 line.stateAfter = null; |
| 3694 } |
| 3695 |
| 3696 // Utility for applying a change to a line by handle or number, |
| 3697 // returning the number and optionally registering the line as |
| 3698 // changed. |
| 3699 function changeLine(cm, handle, changeType, op) { |
| 3700 var no = handle, line = handle, doc = cm.doc; |
| 3701 if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle)); |
| 3702 else no = lineNo(handle); |
| 3703 if (no == null) return null; |
| 3704 if (op(line, no)) regLineChange(cm, no, changeType); |
| 3705 return line; |
| 3706 } |
| 3707 |
| 3708 // Helper for deleting text near the selection(s), used to implement |
| 3709 // backspace, delete, and similar functionality. |
| 3710 function deleteNearSelection(cm, compute) { |
| 3711 var ranges = cm.doc.sel.ranges, kill = []; |
| 3712 // Build up a set of ranges to kill first, merging overlapping |
| 3713 // ranges. |
| 3714 for (var i = 0; i < ranges.length; i++) { |
| 3715 var toKill = compute(ranges[i]); |
| 3716 while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) { |
| 3717 var replaced = kill.pop(); |
| 3718 if (cmp(replaced.from, toKill.from) < 0) { |
| 3719 toKill.from = replaced.from; |
| 3720 break; |
| 3721 } |
| 3722 } |
| 3723 kill.push(toKill); |
| 3724 } |
| 3725 // Next, remove those actual ranges. |
| 3726 runInOp(cm, function() { |
| 3727 for (var i = kill.length - 1; i >= 0; i--) |
| 3728 replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); |
| 3729 ensureCursorVisible(cm); |
| 3730 }); |
| 3731 } |
| 3732 |
| 3733 // Used for horizontal relative motion. Dir is -1 or 1 (left or |
| 3734 // right), unit can be "char", "column" (like char, but doesn't |
| 3735 // cross line boundaries), "word" (across next word), or "group" (to |
| 3736 // the start of next group of word or non-word-non-whitespace |
| 3737 // chars). The visually param controls whether, in right-to-left |
| 3738 // text, direction 1 means to move towards the next index in the |
| 3739 // string, or towards the character to the right of the current |
| 3740 // position. The resulting position will have a hitSide=true |
| 3741 // property if it reached the end of the document. |
| 3742 function findPosH(doc, pos, dir, unit, visually) { |
| 3743 var line = pos.line, ch = pos.ch, origDir = dir; |
| 3744 var lineObj = getLine(doc, line); |
| 3745 var possible = true; |
| 3746 function findNextLine() { |
| 3747 var l = line + dir; |
| 3748 if (l < doc.first || l >= doc.first + doc.size) return (possible = false); |
| 3749 line = l; |
| 3750 return lineObj = getLine(doc, l); |
| 3751 } |
| 3752 function moveOnce(boundToLine) { |
| 3753 var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, tru
e); |
| 3754 if (next == null) { |
| 3755 if (!boundToLine && findNextLine()) { |
| 3756 if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj); |
| 3757 else ch = dir < 0 ? lineObj.text.length : 0; |
| 3758 } else return (possible = false); |
| 3759 } else ch = next; |
| 3760 return true; |
| 3761 } |
| 3762 |
| 3763 if (unit == "char") moveOnce(); |
| 3764 else if (unit == "column") moveOnce(true); |
| 3765 else if (unit == "word" || unit == "group") { |
| 3766 var sawType = null, group = unit == "group"; |
| 3767 for (var first = true;; first = false) { |
| 3768 if (dir < 0 && !moveOnce(!first)) break; |
| 3769 var cur = lineObj.text.charAt(ch) || "\n"; |
| 3770 var type = isWordChar(cur) ? "w" |
| 3771 : group && cur == "\n" ? "n" |
| 3772 : !group || /\s/.test(cur) ? null |
| 3773 : "p"; |
| 3774 if (group && !first && !type) type = "s"; |
| 3775 if (sawType && sawType != type) { |
| 3776 if (dir < 0) {dir = 1; moveOnce();} |
| 3777 break; |
| 3778 } |
| 3779 |
| 3780 if (type) sawType = type; |
| 3781 if (dir > 0 && !moveOnce(!first)) break; |
| 3782 } |
| 3783 } |
| 3784 var result = skipAtomic(doc, Pos(line, ch), origDir, true); |
| 3785 if (!possible) result.hitSide = true; |
| 3786 return result; |
| 3787 } |
| 3788 |
| 3789 // For relative vertical movement. Dir may be -1 or 1. Unit can be |
| 3790 // "page" or "line". The resulting position will have a hitSide=true |
| 3791 // property if it reached the end of the document. |
| 3792 function findPosV(cm, pos, dir, unit) { |
| 3793 var doc = cm.doc, x = pos.left, y; |
| 3794 if (unit == "page") { |
| 3795 var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeigh
t || document.documentElement.clientHeight); |
| 3796 y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.displ
ay)); |
| 3797 } else if (unit == "line") { |
| 3798 y = dir > 0 ? pos.bottom + 3 : pos.top - 3; |
| 3799 } |
| 3800 for (;;) { |
| 3801 var target = coordsChar(cm, x, y); |
| 3802 if (!target.outside) break; |
| 3803 if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; } |
| 3804 y += dir * 5; |
| 3805 } |
| 3806 return target; |
| 3807 } |
| 3808 |
| 3809 // Find the word at the given position (as returned by coordsChar). |
| 3810 function findWordAt(doc, pos) { |
| 3811 var line = getLine(doc, pos.line).text; |
| 3812 var start = pos.ch, end = pos.ch; |
| 3813 if (line) { |
| 3814 if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end; |
| 3815 var startChar = line.charAt(start); |
| 3816 var check = isWordChar(startChar) ? isWordChar |
| 3817 : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} |
| 3818 : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);}; |
| 3819 while (start > 0 && check(line.charAt(start - 1))) --start; |
| 3820 while (end < line.length && check(line.charAt(end))) ++end; |
| 3821 } |
| 3822 return new Range(Pos(pos.line, start), Pos(pos.line, end)); |
| 3823 } |
| 3824 |
| 3825 // EDITOR METHODS |
| 3826 |
| 3827 // The publicly visible API. Note that methodOp(f) means |
| 3828 // 'wrap f in an operation, performed on its `this` parameter'. |
| 3829 |
| 3830 // This is not the complete set of editor methods. Most of the |
| 3831 // methods defined on the Doc type are also injected into |
| 3832 // CodeMirror.prototype, for backwards compatibility and |
| 3833 // convenience. |
| 3834 |
| 3835 CodeMirror.prototype = { |
| 3836 constructor: CodeMirror, |
| 3837 focus: function(){window.focus(); focusInput(this); fastPoll(this);}, |
| 3838 |
| 3839 setOption: function(option, value) { |
| 3840 var options = this.options, old = options[option]; |
| 3841 if (options[option] == value && option != "mode") return; |
| 3842 options[option] = value; |
| 3843 if (optionHandlers.hasOwnProperty(option)) |
| 3844 operation(this, optionHandlers[option])(this, value, old); |
| 3845 }, |
| 3846 |
| 3847 getOption: function(option) {return this.options[option];}, |
| 3848 getDoc: function() {return this.doc;}, |
| 3849 |
| 3850 addKeyMap: function(map, bottom) { |
| 3851 this.state.keyMaps[bottom ? "push" : "unshift"](map); |
| 3852 }, |
| 3853 removeKeyMap: function(map) { |
| 3854 var maps = this.state.keyMaps; |
| 3855 for (var i = 0; i < maps.length; ++i) |
| 3856 if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map
)) { |
| 3857 maps.splice(i, 1); |
| 3858 return true; |
| 3859 } |
| 3860 }, |
| 3861 |
| 3862 addOverlay: methodOp(function(spec, options) { |
| 3863 var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec); |
| 3864 if (mode.startState) throw new Error("Overlays may not be stateful."); |
| 3865 this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && o
ptions.opaque}); |
| 3866 this.state.modeGen++; |
| 3867 regChange(this); |
| 3868 }), |
| 3869 removeOverlay: methodOp(function(spec) { |
| 3870 var overlays = this.state.overlays; |
| 3871 for (var i = 0; i < overlays.length; ++i) { |
| 3872 var cur = overlays[i].modeSpec; |
| 3873 if (cur == spec || typeof spec == "string" && cur.name == spec) { |
| 3874 overlays.splice(i, 1); |
| 3875 this.state.modeGen++; |
| 3876 regChange(this); |
| 3877 return; |
| 3878 } |
| 3879 } |
| 3880 }), |
| 3881 |
| 3882 indentLine: methodOp(function(n, dir, aggressive) { |
| 3883 if (typeof dir != "string" && typeof dir != "number") { |
| 3884 if (dir == null) dir = this.options.smartIndent ? "smart" : "prev"; |
| 3885 else dir = dir ? "add" : "subtract"; |
| 3886 } |
| 3887 if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive); |
| 3888 }), |
| 3889 indentSelection: methodOp(function(how) { |
| 3890 var ranges = this.doc.sel.ranges, end = -1; |
| 3891 for (var i = 0; i < ranges.length; i++) { |
| 3892 var range = ranges[i]; |
| 3893 if (!range.empty()) { |
| 3894 var start = Math.max(end, range.from().line); |
| 3895 var to = range.to(); |
| 3896 end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1; |
| 3897 for (var j = start; j < end; ++j) |
| 3898 indentLine(this, j, how); |
| 3899 } else if (range.head.line > end) { |
| 3900 indentLine(this, range.head.line, how, true); |
| 3901 end = range.head.line; |
| 3902 if (i == this.doc.sel.primIndex) ensureCursorVisible(this); |
| 3903 } |
| 3904 } |
| 3905 }), |
| 3906 |
| 3907 // Fetch the parser token for a given character. Useful for hacks |
| 3908 // that want to inspect the mode state (say, for completion). |
| 3909 getTokenAt: function(pos, precise) { |
| 3910 var doc = this.doc; |
| 3911 pos = clipPos(doc, pos); |
| 3912 var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode; |
| 3913 var line = getLine(doc, pos.line); |
| 3914 var stream = new StringStream(line.text, this.options.tabSize); |
| 3915 while (stream.pos < pos.ch && !stream.eol()) { |
| 3916 stream.start = stream.pos; |
| 3917 var style = readToken(mode, stream, state); |
| 3918 } |
| 3919 return {start: stream.start, |
| 3920 end: stream.pos, |
| 3921 string: stream.current(), |
| 3922 type: style || null, |
| 3923 state: state}; |
| 3924 }, |
| 3925 |
| 3926 getTokenTypeAt: function(pos) { |
| 3927 pos = clipPos(this.doc, pos); |
| 3928 var styles = getLineStyles(this, getLine(this.doc, pos.line)); |
| 3929 var before = 0, after = (styles.length - 1) / 2, ch = pos.ch; |
| 3930 var type; |
| 3931 if (ch == 0) type = styles[2]; |
| 3932 else for (;;) { |
| 3933 var mid = (before + after) >> 1; |
| 3934 if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid; |
| 3935 else if (styles[mid * 2 + 1] < ch) before = mid + 1; |
| 3936 else { type = styles[mid * 2 + 2]; break; } |
| 3937 } |
| 3938 var cut = type ? type.indexOf("cm-overlay ") : -1; |
| 3939 return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1); |
| 3940 }, |
| 3941 |
| 3942 getModeAt: function(pos) { |
| 3943 var mode = this.doc.mode; |
| 3944 if (!mode.innerMode) return mode; |
| 3945 return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode; |
| 3946 }, |
| 3947 |
| 3948 getHelper: function(pos, type) { |
| 3949 return this.getHelpers(pos, type)[0]; |
| 3950 }, |
| 3951 |
| 3952 getHelpers: function(pos, type) { |
| 3953 var found = []; |
| 3954 if (!helpers.hasOwnProperty(type)) return helpers; |
| 3955 var help = helpers[type], mode = this.getModeAt(pos); |
| 3956 if (typeof mode[type] == "string") { |
| 3957 if (help[mode[type]]) found.push(help[mode[type]]); |
| 3958 } else if (mode[type]) { |
| 3959 for (var i = 0; i < mode[type].length; i++) { |
| 3960 var val = help[mode[type][i]]; |
| 3961 if (val) found.push(val); |
| 3962 } |
| 3963 } else if (mode.helperType && help[mode.helperType]) { |
| 3964 found.push(help[mode.helperType]); |
| 3965 } else if (help[mode.name]) { |
| 3966 found.push(help[mode.name]); |
| 3967 } |
| 3968 for (var i = 0; i < help._global.length; i++) { |
| 3969 var cur = help._global[i]; |
| 3970 if (cur.pred(mode, this) && indexOf(found, cur.val) == -1) |
| 3971 found.push(cur.val); |
| 3972 } |
| 3973 return found; |
| 3974 }, |
| 3975 |
| 3976 getStateAfter: function(line, precise) { |
| 3977 var doc = this.doc; |
| 3978 line = clipLine(doc, line == null ? doc.first + doc.size - 1: line); |
| 3979 return getStateBefore(this, line + 1, precise); |
| 3980 }, |
| 3981 |
| 3982 cursorCoords: function(start, mode) { |
| 3983 var pos, range = this.doc.sel.primary(); |
| 3984 if (start == null) pos = range.head; |
| 3985 else if (typeof start == "object") pos = clipPos(this.doc, start); |
| 3986 else pos = start ? range.from() : range.to(); |
| 3987 return cursorCoords(this, pos, mode || "page"); |
| 3988 }, |
| 3989 |
| 3990 charCoords: function(pos, mode) { |
| 3991 return charCoords(this, clipPos(this.doc, pos), mode || "page"); |
| 3992 }, |
| 3993 |
| 3994 coordsChar: function(coords, mode) { |
| 3995 coords = fromCoordSystem(this, coords, mode || "page"); |
| 3996 return coordsChar(this, coords.left, coords.top); |
| 3997 }, |
| 3998 |
| 3999 lineAtHeight: function(height, mode) { |
| 4000 height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top
; |
| 4001 return lineAtHeight(this.doc, height + this.display.viewOffset); |
| 4002 }, |
| 4003 heightAtLine: function(line, mode) { |
| 4004 var end = false, last = this.doc.first + this.doc.size - 1; |
| 4005 if (line < this.doc.first) line = this.doc.first; |
| 4006 else if (line > last) { line = last; end = true; } |
| 4007 var lineObj = getLine(this.doc, line); |
| 4008 return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").t
op + |
| 4009 (end ? this.doc.height - heightAtLine(lineObj) : 0); |
| 4010 }, |
| 4011 |
| 4012 defaultTextHeight: function() { return textHeight(this.display); }, |
| 4013 defaultCharWidth: function() { return charWidth(this.display); }, |
| 4014 |
| 4015 setGutterMarker: methodOp(function(line, gutterID, value) { |
| 4016 return changeLine(this, line, "gutter", function(line) { |
| 4017 var markers = line.gutterMarkers || (line.gutterMarkers = {}); |
| 4018 markers[gutterID] = value; |
| 4019 if (!value && isEmpty(markers)) line.gutterMarkers = null; |
| 4020 return true; |
| 4021 }); |
| 4022 }), |
| 4023 |
| 4024 clearGutter: methodOp(function(gutterID) { |
| 4025 var cm = this, doc = cm.doc, i = doc.first; |
| 4026 doc.iter(function(line) { |
| 4027 if (line.gutterMarkers && line.gutterMarkers[gutterID]) { |
| 4028 line.gutterMarkers[gutterID] = null; |
| 4029 regLineChange(cm, i, "gutter"); |
| 4030 if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null; |
| 4031 } |
| 4032 ++i; |
| 4033 }); |
| 4034 }), |
| 4035 |
| 4036 addLineClass: methodOp(function(handle, where, cls) { |
| 4037 return changeLine(this, handle, "class", function(line) { |
| 4038 var prop = where == "text" ? "textClass" : where == "background" ? "bgCl
ass" : "wrapClass"; |
| 4039 if (!line[prop]) line[prop] = cls; |
| 4040 else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) r
eturn false; |
| 4041 else line[prop] += " " + cls; |
| 4042 return true; |
| 4043 }); |
| 4044 }), |
| 4045 |
| 4046 removeLineClass: methodOp(function(handle, where, cls) { |
| 4047 return changeLine(this, handle, "class", function(line) { |
| 4048 var prop = where == "text" ? "textClass" : where == "background" ? "bgCl
ass" : "wrapClass"; |
| 4049 var cur = line[prop]; |
| 4050 if (!cur) return false; |
| 4051 else if (cls == null) line[prop] = null; |
| 4052 else { |
| 4053 var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)")); |
| 4054 if (!found) return false; |
| 4055 var end = found.index + found[0].length; |
| 4056 line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.l
ength ? "" : " ") + cur.slice(end) || null; |
| 4057 } |
| 4058 return true; |
| 4059 }); |
| 4060 }), |
| 4061 |
| 4062 addLineWidget: methodOp(function(handle, node, options) { |
| 4063 return addLineWidget(this, handle, node, options); |
| 4064 }), |
| 4065 |
| 4066 removeLineWidget: function(widget) { widget.clear(); }, |
| 4067 |
| 4068 lineInfo: function(line) { |
| 4069 if (typeof line == "number") { |
| 4070 if (!isLine(this.doc, line)) return null; |
| 4071 var n = line; |
| 4072 line = getLine(this.doc, line); |
| 4073 if (!line) return null; |
| 4074 } else { |
| 4075 var n = lineNo(line); |
| 4076 if (n == null) return null; |
| 4077 } |
| 4078 return {line: n, handle: line, text: line.text, gutterMarkers: line.gutter
Markers, |
| 4079 textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.
wrapClass, |
| 4080 widgets: line.widgets}; |
| 4081 }, |
| 4082 |
| 4083 getViewport: function() { return {from: this.display.viewFrom, to: this.disp
lay.viewTo};}, |
| 4084 |
| 4085 addWidget: function(pos, node, scroll, vert, horiz) { |
| 4086 var display = this.display; |
| 4087 pos = cursorCoords(this, clipPos(this.doc, pos)); |
| 4088 var top = pos.bottom, left = pos.left; |
| 4089 node.style.position = "absolute"; |
| 4090 display.sizer.appendChild(node); |
| 4091 if (vert == "over") { |
| 4092 top = pos.top; |
| 4093 } else if (vert == "above" || vert == "near") { |
| 4094 var vspace = Math.max(display.wrapper.clientHeight, this.doc.height), |
| 4095 hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWid
th); |
| 4096 // Default to positioning above (if specified and possible); otherwise d
efault to positioning below |
| 4097 if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.
top > node.offsetHeight) |
| 4098 top = pos.top - node.offsetHeight; |
| 4099 else if (pos.bottom + node.offsetHeight <= vspace) |
| 4100 top = pos.bottom; |
| 4101 if (left + node.offsetWidth > hspace) |
| 4102 left = hspace - node.offsetWidth; |
| 4103 } |
| 4104 node.style.top = top + "px"; |
| 4105 node.style.left = node.style.right = ""; |
| 4106 if (horiz == "right") { |
| 4107 left = display.sizer.clientWidth - node.offsetWidth; |
| 4108 node.style.right = "0px"; |
| 4109 } else { |
| 4110 if (horiz == "left") left = 0; |
| 4111 else if (horiz == "middle") left = (display.sizer.clientWidth - node.off
setWidth) / 2; |
| 4112 node.style.left = left + "px"; |
| 4113 } |
| 4114 if (scroll) |
| 4115 scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offs
etHeight); |
| 4116 }, |
| 4117 |
| 4118 triggerOnKeyDown: methodOp(onKeyDown), |
| 4119 triggerOnKeyPress: methodOp(onKeyPress), |
| 4120 triggerOnKeyUp: methodOp(onKeyUp), |
| 4121 |
| 4122 execCommand: function(cmd) { |
| 4123 if (commands.hasOwnProperty(cmd)) |
| 4124 return commands[cmd](this); |
| 4125 }, |
| 4126 |
| 4127 findPosH: function(from, amount, unit, visually) { |
| 4128 var dir = 1; |
| 4129 if (amount < 0) { dir = -1; amount = -amount; } |
| 4130 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { |
| 4131 cur = findPosH(this.doc, cur, dir, unit, visually); |
| 4132 if (cur.hitSide) break; |
| 4133 } |
| 4134 return cur; |
| 4135 }, |
| 4136 |
| 4137 moveH: methodOp(function(dir, unit) { |
| 4138 var cm = this; |
| 4139 cm.extendSelectionsBy(function(range) { |
| 4140 if (cm.display.shift || cm.doc.extend || range.empty()) |
| 4141 return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisua
lly); |
| 4142 else |
| 4143 return dir < 0 ? range.from() : range.to(); |
| 4144 }, sel_move); |
| 4145 }), |
| 4146 |
| 4147 deleteH: methodOp(function(dir, unit) { |
| 4148 var sel = this.doc.sel, doc = this.doc; |
| 4149 if (sel.somethingSelected()) |
| 4150 doc.replaceSelection("", null, "+delete"); |
| 4151 else |
| 4152 deleteNearSelection(this, function(range) { |
| 4153 var other = findPosH(doc, range.head, dir, unit, false); |
| 4154 return dir < 0 ? {from: other, to: range.head} : {from: range.head, to
: other}; |
| 4155 }); |
| 4156 }), |
| 4157 |
| 4158 findPosV: function(from, amount, unit, goalColumn) { |
| 4159 var dir = 1, x = goalColumn; |
| 4160 if (amount < 0) { dir = -1; amount = -amount; } |
| 4161 for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { |
| 4162 var coords = cursorCoords(this, cur, "div"); |
| 4163 if (x == null) x = coords.left; |
| 4164 else coords.left = x; |
| 4165 cur = findPosV(this, coords, dir, unit); |
| 4166 if (cur.hitSide) break; |
| 4167 } |
| 4168 return cur; |
| 4169 }, |
| 4170 |
| 4171 moveV: methodOp(function(dir, unit) { |
| 4172 var cm = this, doc = this.doc, goals = []; |
| 4173 var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelect
ed(); |
| 4174 doc.extendSelectionsBy(function(range) { |
| 4175 if (collapse) |
| 4176 return dir < 0 ? range.from() : range.to(); |
| 4177 var headPos = cursorCoords(cm, range.head, "div"); |
| 4178 if (range.goalColumn != null) headPos.left = range.goalColumn; |
| 4179 goals.push(headPos.left); |
| 4180 var pos = findPosV(cm, headPos, dir, unit); |
| 4181 if (unit == "page" && range == doc.sel.primary()) |
| 4182 addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top)
; |
| 4183 return pos; |
| 4184 }, sel_move); |
| 4185 if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++) |
| 4186 doc.sel.ranges[i].goalColumn = goals[i]; |
| 4187 }), |
| 4188 |
| 4189 toggleOverwrite: function(value) { |
| 4190 if (value != null && value == this.state.overwrite) return; |
| 4191 if (this.state.overwrite = !this.state.overwrite) |
| 4192 addClass(this.display.cursorDiv, "CodeMirror-overwrite"); |
| 4193 else |
| 4194 rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); |
| 4195 |
| 4196 signal(this, "overwriteToggle", this, this.state.overwrite); |
| 4197 }, |
| 4198 hasFocus: function() { return activeElt() == this.display.input; }, |
| 4199 |
| 4200 scrollTo: methodOp(function(x, y) { |
| 4201 if (x != null || y != null) resolveScrollToPos(this); |
| 4202 if (x != null) this.curOp.scrollLeft = x; |
| 4203 if (y != null) this.curOp.scrollTop = y; |
| 4204 }), |
| 4205 getScrollInfo: function() { |
| 4206 var scroller = this.display.scroller, co = scrollerCutOff; |
| 4207 return {left: scroller.scrollLeft, top: scroller.scrollTop, |
| 4208 height: scroller.scrollHeight - co, width: scroller.scrollWidth -
co, |
| 4209 clientHeight: scroller.clientHeight - co, clientWidth: scroller.cl
ientWidth - co}; |
| 4210 }, |
| 4211 |
| 4212 scrollIntoView: methodOp(function(range, margin) { |
| 4213 if (range == null) { |
| 4214 range = {from: this.doc.sel.primary().head, to: null}; |
| 4215 if (margin == null) margin = this.options.cursorScrollMargin; |
| 4216 } else if (typeof range == "number") { |
| 4217 range = {from: Pos(range, 0), to: null}; |
| 4218 } else if (range.from == null) { |
| 4219 range = {from: range, to: null}; |
| 4220 } |
| 4221 if (!range.to) range.to = range.from; |
| 4222 range.margin = margin || 0; |
| 4223 |
| 4224 if (range.from.line != null) { |
| 4225 resolveScrollToPos(this); |
| 4226 this.curOp.scrollToPos = range; |
| 4227 } else { |
| 4228 var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.l
eft), |
| 4229 Math.min(range.from.top, range.to.top) - r
ange.margin, |
| 4230 Math.max(range.from.right, range.to.right)
, |
| 4231 Math.max(range.from.bottom, range.to.botto
m) + range.margin); |
| 4232 this.scrollTo(sPos.scrollLeft, sPos.scrollTop); |
| 4233 } |
| 4234 }), |
| 4235 |
| 4236 setSize: methodOp(function(width, height) { |
| 4237 function interpret(val) { |
| 4238 return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px"
: val; |
| 4239 } |
| 4240 if (width != null) this.display.wrapper.style.width = interpret(width); |
| 4241 if (height != null) this.display.wrapper.style.height = interpret(height); |
| 4242 if (this.options.lineWrapping) clearLineMeasurementCache(this); |
| 4243 this.curOp.forceUpdate = true; |
| 4244 signal(this, "refresh", this); |
| 4245 }), |
| 4246 |
| 4247 operation: function(f){return runInOp(this, f);}, |
| 4248 |
| 4249 refresh: methodOp(function() { |
| 4250 var oldHeight = this.display.cachedTextHeight; |
| 4251 regChange(this); |
| 4252 this.curOp.forceUpdate = true; |
| 4253 clearCaches(this); |
| 4254 this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop); |
| 4255 updateGutterSpace(this); |
| 4256 if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) >
.5) |
| 4257 estimateLineHeights(this); |
| 4258 signal(this, "refresh", this); |
| 4259 }), |
| 4260 |
| 4261 swapDoc: methodOp(function(doc) { |
| 4262 var old = this.doc; |
| 4263 old.cm = null; |
| 4264 attachDoc(this, doc); |
| 4265 clearCaches(this); |
| 4266 resetInput(this); |
| 4267 this.scrollTo(doc.scrollLeft, doc.scrollTop); |
| 4268 signalLater(this, "swapDoc", this, old); |
| 4269 return old; |
| 4270 }), |
| 4271 |
| 4272 getInputField: function(){return this.display.input;}, |
| 4273 getWrapperElement: function(){return this.display.wrapper;}, |
| 4274 getScrollerElement: function(){return this.display.scroller;}, |
| 4275 getGutterElement: function(){return this.display.gutters;} |
| 4276 }; |
| 4277 eventMixin(CodeMirror); |
| 4278 |
| 4279 // OPTION DEFAULTS |
| 4280 |
| 4281 // The default configuration options. |
| 4282 var defaults = CodeMirror.defaults = {}; |
| 4283 // Functions to run when options are changed. |
| 4284 var optionHandlers = CodeMirror.optionHandlers = {}; |
| 4285 |
| 4286 function option(name, deflt, handle, notOnInit) { |
| 4287 CodeMirror.defaults[name] = deflt; |
| 4288 if (handle) optionHandlers[name] = |
| 4289 notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);
} : handle; |
| 4290 } |
| 4291 |
| 4292 // Passed to option handlers when there is no old value. |
| 4293 var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}}
; |
| 4294 |
| 4295 // These two are, on init, called from the constructor because they |
| 4296 // have to be initialized before the editor can start at all. |
| 4297 option("value", "", function(cm, val) { |
| 4298 cm.setValue(val); |
| 4299 }, true); |
| 4300 option("mode", null, function(cm, val) { |
| 4301 cm.doc.modeOption = val; |
| 4302 loadMode(cm); |
| 4303 }, true); |
| 4304 |
| 4305 option("indentUnit", 2, loadMode, true); |
| 4306 option("indentWithTabs", false); |
| 4307 option("smartIndent", true); |
| 4308 option("tabSize", 4, function(cm) { |
| 4309 resetModeState(cm); |
| 4310 clearCaches(cm); |
| 4311 regChange(cm); |
| 4312 }, true); |
| 4313 option("specialChars", /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/g, fun
ction(cm, val) { |
| 4314 cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\
t"), "g"); |
| 4315 cm.refresh(); |
| 4316 }, true); |
| 4317 option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {
cm.refresh();}, true); |
| 4318 option("electricChars", true); |
| 4319 option("rtlMoveVisually", !windows); |
| 4320 option("wholeLineUpdateBefore", true); |
| 4321 |
| 4322 option("theme", "default", function(cm) { |
| 4323 themeChanged(cm); |
| 4324 guttersChanged(cm); |
| 4325 }, true); |
| 4326 option("keyMap", "default", keyMapChanged); |
| 4327 option("extraKeys", null); |
| 4328 |
| 4329 option("lineWrapping", false, wrappingChanged, true); |
| 4330 option("gutters", [], function(cm) { |
| 4331 setGuttersForLineNumbers(cm.options); |
| 4332 guttersChanged(cm); |
| 4333 }, true); |
| 4334 option("fixedGutter", true, function(cm, val) { |
| 4335 cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px
" : "0"; |
| 4336 cm.refresh(); |
| 4337 }, true); |
| 4338 option("coverGutterNextToScrollbar", false, updateScrollbars, true); |
| 4339 option("lineNumbers", false, function(cm) { |
| 4340 setGuttersForLineNumbers(cm.options); |
| 4341 guttersChanged(cm); |
| 4342 }, true); |
| 4343 option("firstLineNumber", 1, guttersChanged, true); |
| 4344 option("lineNumberFormatter", function(integer) {return integer;}, guttersChan
ged, true); |
| 4345 option("showCursorWhenSelecting", false, updateSelection, true); |
| 4346 |
| 4347 option("resetSelectionOnContextMenu", true); |
| 4348 |
| 4349 option("readOnly", false, function(cm, val) { |
| 4350 if (val == "nocursor") { |
| 4351 onBlur(cm); |
| 4352 cm.display.input.blur(); |
| 4353 cm.display.disabled = true; |
| 4354 } else { |
| 4355 cm.display.disabled = false; |
| 4356 if (!val) resetInput(cm); |
| 4357 } |
| 4358 }); |
| 4359 option("disableInput", false, function(cm, val) {if (!val) resetInput(cm);}, t
rue); |
| 4360 option("dragDrop", true); |
| 4361 |
| 4362 option("cursorBlinkRate", 530); |
| 4363 option("cursorScrollMargin", 0); |
| 4364 option("cursorHeight", 1); |
| 4365 option("workTime", 100); |
| 4366 option("workDelay", 100); |
| 4367 option("flattenSpans", true, resetModeState, true); |
| 4368 option("addModeClass", false, resetModeState, true); |
| 4369 option("pollInterval", 100); |
| 4370 option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;}); |
| 4371 option("historyEventDelay", 1250); |
| 4372 option("viewportMargin", 10, function(cm){cm.refresh();}, true); |
| 4373 option("maxHighlightLength", 10000, resetModeState, true); |
| 4374 option("moveInputWithCursor", true, function(cm, val) { |
| 4375 if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0
; |
| 4376 }); |
| 4377 |
| 4378 option("tabindex", null, function(cm, val) { |
| 4379 cm.display.input.tabIndex = val || ""; |
| 4380 }); |
| 4381 option("autofocus", null); |
| 4382 |
| 4383 // MODE DEFINITION AND QUERYING |
| 4384 |
| 4385 // Known modes, by name and by MIME |
| 4386 var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {}; |
| 4387 |
| 4388 // Extra arguments are stored as the mode's dependencies, which is |
| 4389 // used by (legacy) mechanisms like loadmode.js to automatically |
| 4390 // load a mode. (Preferred mechanism is the require/define calls.) |
| 4391 CodeMirror.defineMode = function(name, mode) { |
| 4392 if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode =
name; |
| 4393 if (arguments.length > 2) { |
| 4394 mode.dependencies = []; |
| 4395 for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(argument
s[i]); |
| 4396 } |
| 4397 modes[name] = mode; |
| 4398 }; |
| 4399 |
| 4400 CodeMirror.defineMIME = function(mime, spec) { |
| 4401 mimeModes[mime] = spec; |
| 4402 }; |
| 4403 |
| 4404 // Given a MIME type, a {name, ...options} config object, or a name |
| 4405 // string, return a mode config object. |
| 4406 CodeMirror.resolveMode = function(spec) { |
| 4407 if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) { |
| 4408 spec = mimeModes[spec]; |
| 4409 } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(
spec.name)) { |
| 4410 var found = mimeModes[spec.name]; |
| 4411 if (typeof found == "string") found = {name: found}; |
| 4412 spec = createObj(found, spec); |
| 4413 spec.name = found.name; |
| 4414 } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec))
{ |
| 4415 return CodeMirror.resolveMode("application/xml"); |
| 4416 } |
| 4417 if (typeof spec == "string") return {name: spec}; |
| 4418 else return spec || {name: "null"}; |
| 4419 }; |
| 4420 |
| 4421 // Given a mode spec (anything that resolveMode accepts), find and |
| 4422 // initialize an actual mode object. |
| 4423 CodeMirror.getMode = function(options, spec) { |
| 4424 var spec = CodeMirror.resolveMode(spec); |
| 4425 var mfactory = modes[spec.name]; |
| 4426 if (!mfactory) return CodeMirror.getMode(options, "text/plain"); |
| 4427 var modeObj = mfactory(options, spec); |
| 4428 if (modeExtensions.hasOwnProperty(spec.name)) { |
| 4429 var exts = modeExtensions[spec.name]; |
| 4430 for (var prop in exts) { |
| 4431 if (!exts.hasOwnProperty(prop)) continue; |
| 4432 if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop]; |
| 4433 modeObj[prop] = exts[prop]; |
| 4434 } |
| 4435 } |
| 4436 modeObj.name = spec.name; |
| 4437 if (spec.helperType) modeObj.helperType = spec.helperType; |
| 4438 if (spec.modeProps) for (var prop in spec.modeProps) |
| 4439 modeObj[prop] = spec.modeProps[prop]; |
| 4440 |
| 4441 return modeObj; |
| 4442 }; |
| 4443 |
| 4444 // Minimal default mode. |
| 4445 CodeMirror.defineMode("null", function() { |
| 4446 return {token: function(stream) {stream.skipToEnd();}}; |
| 4447 }); |
| 4448 CodeMirror.defineMIME("text/plain", "null"); |
| 4449 |
| 4450 // This can be used to attach properties to mode objects from |
| 4451 // outside the actual mode definition. |
| 4452 var modeExtensions = CodeMirror.modeExtensions = {}; |
| 4453 CodeMirror.extendMode = function(mode, properties) { |
| 4454 var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (mod
eExtensions[mode] = {}); |
| 4455 copyObj(properties, exts); |
| 4456 }; |
| 4457 |
| 4458 // EXTENSIONS |
| 4459 |
| 4460 CodeMirror.defineExtension = function(name, func) { |
| 4461 CodeMirror.prototype[name] = func; |
| 4462 }; |
| 4463 CodeMirror.defineDocExtension = function(name, func) { |
| 4464 Doc.prototype[name] = func; |
| 4465 }; |
| 4466 CodeMirror.defineOption = option; |
| 4467 |
| 4468 var initHooks = []; |
| 4469 CodeMirror.defineInitHook = function(f) {initHooks.push(f);}; |
| 4470 |
| 4471 var helpers = CodeMirror.helpers = {}; |
| 4472 CodeMirror.registerHelper = function(type, name, value) { |
| 4473 if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_glob
al: []}; |
| 4474 helpers[type][name] = value; |
| 4475 }; |
| 4476 CodeMirror.registerGlobalHelper = function(type, name, predicate, value) { |
| 4477 CodeMirror.registerHelper(type, name, value); |
| 4478 helpers[type]._global.push({pred: predicate, val: value}); |
| 4479 }; |
| 4480 |
| 4481 // MODE STATE HANDLING |
| 4482 |
| 4483 // Utility functions for working with state. Exported because nested |
| 4484 // modes need to do this for their inner modes. |
| 4485 |
| 4486 var copyState = CodeMirror.copyState = function(mode, state) { |
| 4487 if (state === true) return state; |
| 4488 if (mode.copyState) return mode.copyState(state); |
| 4489 var nstate = {}; |
| 4490 for (var n in state) { |
| 4491 var val = state[n]; |
| 4492 if (val instanceof Array) val = val.concat([]); |
| 4493 nstate[n] = val; |
| 4494 } |
| 4495 return nstate; |
| 4496 }; |
| 4497 |
| 4498 var startState = CodeMirror.startState = function(mode, a1, a2) { |
| 4499 return mode.startState ? mode.startState(a1, a2) : true; |
| 4500 }; |
| 4501 |
| 4502 // Given a mode and a state (for that mode), find the inner mode and |
| 4503 // state at the position that the state refers to. |
| 4504 CodeMirror.innerMode = function(mode, state) { |
| 4505 while (mode.innerMode) { |
| 4506 var info = mode.innerMode(state); |
| 4507 if (!info || info.mode == mode) break; |
| 4508 state = info.state; |
| 4509 mode = info.mode; |
| 4510 } |
| 4511 return info || {mode: mode, state: state}; |
| 4512 }; |
| 4513 |
| 4514 // STANDARD COMMANDS |
| 4515 |
| 4516 // Commands are parameter-less actions that can be performed on an |
| 4517 // editor, mostly used for keybindings. |
| 4518 var commands = CodeMirror.commands = { |
| 4519 selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.last
Line()), sel_dontScroll);}, |
| 4520 singleSelection: function(cm) { |
| 4521 cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScro
ll); |
| 4522 }, |
| 4523 killLine: function(cm) { |
| 4524 deleteNearSelection(cm, function(range) { |
| 4525 if (range.empty()) { |
| 4526 var len = getLine(cm.doc, range.head.line).text.length; |
| 4527 if (range.head.ch == len && range.head.line < cm.lastLine()) |
| 4528 return {from: range.head, to: Pos(range.head.line + 1, 0)}; |
| 4529 else |
| 4530 return {from: range.head, to: Pos(range.head.line, len)}; |
| 4531 } else { |
| 4532 return {from: range.from(), to: range.to()}; |
| 4533 } |
| 4534 }); |
| 4535 }, |
| 4536 deleteLine: function(cm) { |
| 4537 deleteNearSelection(cm, function(range) { |
| 4538 return {from: Pos(range.from().line, 0), |
| 4539 to: clipPos(cm.doc, Pos(range.to().line + 1, 0))}; |
| 4540 }); |
| 4541 }, |
| 4542 delLineLeft: function(cm) { |
| 4543 deleteNearSelection(cm, function(range) { |
| 4544 return {from: Pos(range.from().line, 0), to: range.from()}; |
| 4545 }); |
| 4546 }, |
| 4547 undo: function(cm) {cm.undo();}, |
| 4548 redo: function(cm) {cm.redo();}, |
| 4549 undoSelection: function(cm) {cm.undoSelection();}, |
| 4550 redoSelection: function(cm) {cm.redoSelection();}, |
| 4551 goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));}, |
| 4552 goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));}, |
| 4553 goLineStart: function(cm) { |
| 4554 cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.li
ne); }, sel_move); |
| 4555 }, |
| 4556 goLineStartSmart: function(cm) { |
| 4557 cm.extendSelectionsBy(function(range) { |
| 4558 var start = lineStart(cm, range.head.line); |
| 4559 var line = cm.getLineHandle(start.line); |
| 4560 var order = getOrder(line); |
| 4561 if (!order || order[0].level == 0) { |
| 4562 var firstNonWS = Math.max(0, line.text.search(/\S/)); |
| 4563 var inWS = range.head.line == start.line && range.head.ch <= firstNonW
S && range.head.ch; |
| 4564 return Pos(start.line, inWS ? 0 : firstNonWS); |
| 4565 } |
| 4566 return start; |
| 4567 }, sel_move); |
| 4568 }, |
| 4569 goLineEnd: function(cm) { |
| 4570 cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line
); }, sel_move); |
| 4571 }, |
| 4572 goLineRight: function(cm) { |
| 4573 cm.extendSelectionsBy(function(range) { |
| 4574 var top = cm.charCoords(range.head, "div").top + 5; |
| 4575 return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: t
op}, "div"); |
| 4576 }, sel_move); |
| 4577 }, |
| 4578 goLineLeft: function(cm) { |
| 4579 cm.extendSelectionsBy(function(range) { |
| 4580 var top = cm.charCoords(range.head, "div").top + 5; |
| 4581 return cm.coordsChar({left: 0, top: top}, "div"); |
| 4582 }, sel_move); |
| 4583 }, |
| 4584 goLineUp: function(cm) {cm.moveV(-1, "line");}, |
| 4585 goLineDown: function(cm) {cm.moveV(1, "line");}, |
| 4586 goPageUp: function(cm) {cm.moveV(-1, "page");}, |
| 4587 goPageDown: function(cm) {cm.moveV(1, "page");}, |
| 4588 goCharLeft: function(cm) {cm.moveH(-1, "char");}, |
| 4589 goCharRight: function(cm) {cm.moveH(1, "char");}, |
| 4590 goColumnLeft: function(cm) {cm.moveH(-1, "column");}, |
| 4591 goColumnRight: function(cm) {cm.moveH(1, "column");}, |
| 4592 goWordLeft: function(cm) {cm.moveH(-1, "word");}, |
| 4593 goGroupRight: function(cm) {cm.moveH(1, "group");}, |
| 4594 goGroupLeft: function(cm) {cm.moveH(-1, "group");}, |
| 4595 goWordRight: function(cm) {cm.moveH(1, "word");}, |
| 4596 delCharBefore: function(cm) {cm.deleteH(-1, "char");}, |
| 4597 delCharAfter: function(cm) {cm.deleteH(1, "char");}, |
| 4598 delWordBefore: function(cm) {cm.deleteH(-1, "word");}, |
| 4599 delWordAfter: function(cm) {cm.deleteH(1, "word");}, |
| 4600 delGroupBefore: function(cm) {cm.deleteH(-1, "group");}, |
| 4601 delGroupAfter: function(cm) {cm.deleteH(1, "group");}, |
| 4602 indentAuto: function(cm) {cm.indentSelection("smart");}, |
| 4603 indentMore: function(cm) {cm.indentSelection("add");}, |
| 4604 indentLess: function(cm) {cm.indentSelection("subtract");}, |
| 4605 insertTab: function(cm) {cm.replaceSelection("\t");}, |
| 4606 insertSoftTab: function(cm) { |
| 4607 var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSiz
e; |
| 4608 for (var i = 0; i < ranges.length; i++) { |
| 4609 var pos = ranges[i].from(); |
| 4610 var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize); |
| 4611 spaces.push(new Array(tabSize - col % tabSize + 1).join(" ")); |
| 4612 } |
| 4613 cm.replaceSelections(spaces); |
| 4614 }, |
| 4615 defaultTab: function(cm) { |
| 4616 if (cm.somethingSelected()) cm.indentSelection("add"); |
| 4617 else cm.execCommand("insertTab"); |
| 4618 }, |
| 4619 transposeChars: function(cm) { |
| 4620 runInOp(cm, function() { |
| 4621 var ranges = cm.listSelections(); |
| 4622 for (var i = 0; i < ranges.length; i++) { |
| 4623 var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text; |
| 4624 if (cur.ch > 0 && cur.ch < line.length - 1) |
| 4625 cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1), |
| 4626 Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1)
); |
| 4627 } |
| 4628 }); |
| 4629 }, |
| 4630 newlineAndIndent: function(cm) { |
| 4631 runInOp(cm, function() { |
| 4632 var len = cm.listSelections().length; |
| 4633 for (var i = 0; i < len; i++) { |
| 4634 var range = cm.listSelections()[i]; |
| 4635 cm.replaceRange("\n", range.anchor, range.head, "+input"); |
| 4636 cm.indentLine(range.from().line + 1, null, true); |
| 4637 ensureCursorVisible(cm); |
| 4638 } |
| 4639 }); |
| 4640 }, |
| 4641 toggleOverwrite: function(cm) {cm.toggleOverwrite();} |
| 4642 }; |
| 4643 |
| 4644 // STANDARD KEYMAPS |
| 4645 |
| 4646 var keyMap = CodeMirror.keyMap = {}; |
| 4647 keyMap.basic = { |
| 4648 "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goL
ineDown", |
| 4649 "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageD
own": "goPageDown", |
| 4650 "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "
delCharBefore", |
| 4651 "Tab": "defaultTab", "Shift-Tab": "indentAuto", |
| 4652 "Enter": "newlineAndIndent", "Insert": "toggleOverwrite", |
| 4653 "Esc": "singleSelection" |
| 4654 }; |
| 4655 // Note that the save and find-related commands aren't defined by |
| 4656 // default. User code or addons can define them. Unknown commands |
| 4657 // are simply ignored. |
| 4658 keyMap.pcDefault = { |
| 4659 "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl
-Z": "redo", "Ctrl-Y": "redo", |
| 4660 "Ctrl-Home": "goDocStart", "Ctrl-Up": "goDocStart", "Ctrl-End": "goDocEnd",
"Ctrl-Down": "goDocEnd", |
| 4661 "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLin
eStart", "Alt-Right": "goLineEnd", |
| 4662 "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S"
: "save", "Ctrl-F": "find", |
| 4663 "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace",
"Shift-Ctrl-R": "replaceAll", |
| 4664 "Ctrl-[": "indentLess", "Ctrl-]": "indentMore", |
| 4665 "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSe
lection", |
| 4666 fallthrough: "basic" |
| 4667 }; |
| 4668 keyMap.macDefault = { |
| 4669 "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z":
"redo", "Cmd-Y": "redo", |
| 4670 "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-
Left": "goGroupLeft", |
| 4671 "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLine
End", "Alt-Backspace": "delGroupBefore", |
| 4672 "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S
": "save", "Cmd-F": "find", |
| 4673 "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shi
ft-Cmd-Alt-F": "replaceAll", |
| 4674 "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft"
, |
| 4675 "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", |
| 4676 fallthrough: ["basic", "emacsy"] |
| 4677 }; |
| 4678 // Very basic readline/emacs-style bindings, which are standard on Mac. |
| 4679 keyMap.emacsy = { |
| 4680 "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl
-N": "goLineDown", |
| 4681 "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctr
l-E": "goLineEnd", |
| 4682 "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter"
, "Ctrl-H": "delCharBefore", |
| 4683 "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLi
ne", "Ctrl-T": "transposeChars" |
| 4684 }; |
| 4685 keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault; |
| 4686 |
| 4687 // KEYMAP DISPATCH |
| 4688 |
| 4689 function getKeyMap(val) { |
| 4690 if (typeof val == "string") return keyMap[val]; |
| 4691 else return val; |
| 4692 } |
| 4693 |
| 4694 // Given an array of keymaps and a key name, call handle on any |
| 4695 // bindings found, until that returns a truthy value, at which point |
| 4696 // we consider the key handled. Implements things like binding a key |
| 4697 // to false stopping further handling and keymap fallthrough. |
| 4698 var lookupKey = CodeMirror.lookupKey = function(name, maps, handle) { |
| 4699 function lookup(map) { |
| 4700 map = getKeyMap(map); |
| 4701 var found = map[name]; |
| 4702 if (found === false) return "stop"; |
| 4703 if (found != null && handle(found)) return true; |
| 4704 if (map.nofallthrough) return "stop"; |
| 4705 |
| 4706 var fallthrough = map.fallthrough; |
| 4707 if (fallthrough == null) return false; |
| 4708 if (Object.prototype.toString.call(fallthrough) != "[object Array]") |
| 4709 return lookup(fallthrough); |
| 4710 for (var i = 0; i < fallthrough.length; ++i) { |
| 4711 var done = lookup(fallthrough[i]); |
| 4712 if (done) return done; |
| 4713 } |
| 4714 return false; |
| 4715 } |
| 4716 |
| 4717 for (var i = 0; i < maps.length; ++i) { |
| 4718 var done = lookup(maps[i]); |
| 4719 if (done) return done != "stop"; |
| 4720 } |
| 4721 }; |
| 4722 |
| 4723 // Modifier key presses don't count as 'real' key presses for the |
| 4724 // purpose of keymap fallthrough. |
| 4725 var isModifierKey = CodeMirror.isModifierKey = function(event) { |
| 4726 var name = keyNames[event.keyCode]; |
| 4727 return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"; |
| 4728 }; |
| 4729 |
| 4730 // Look up the name of a key as indicated by an event object. |
| 4731 var keyName = CodeMirror.keyName = function(event, noShift) { |
| 4732 if (presto && event.keyCode == 34 && event["char"]) return false; |
| 4733 var name = keyNames[event.keyCode]; |
| 4734 if (name == null || event.altGraphKey) return false; |
| 4735 if (event.altKey) name = "Alt-" + name; |
| 4736 if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name; |
| 4737 if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name; |
| 4738 if (!noShift && event.shiftKey) name = "Shift-" + name; |
| 4739 return name; |
| 4740 }; |
| 4741 |
| 4742 // FROMTEXTAREA |
| 4743 |
| 4744 CodeMirror.fromTextArea = function(textarea, options) { |
| 4745 if (!options) options = {}; |
| 4746 options.value = textarea.value; |
| 4747 if (!options.tabindex && textarea.tabindex) |
| 4748 options.tabindex = textarea.tabindex; |
| 4749 if (!options.placeholder && textarea.placeholder) |
| 4750 options.placeholder = textarea.placeholder; |
| 4751 // Set autofocus to true if this textarea is focused, or if it has |
| 4752 // autofocus and no other element is focused. |
| 4753 if (options.autofocus == null) { |
| 4754 var hasFocus = activeElt(); |
| 4755 options.autofocus = hasFocus == textarea || |
| 4756 textarea.getAttribute("autofocus") != null && hasFocus == document.body; |
| 4757 } |
| 4758 |
| 4759 function save() {textarea.value = cm.getValue();} |
| 4760 if (textarea.form) { |
| 4761 on(textarea.form, "submit", save); |
| 4762 // Deplorable hack to make the submit method do the right thing. |
| 4763 if (!options.leaveSubmitMethodAlone) { |
| 4764 var form = textarea.form, realSubmit = form.submit; |
| 4765 try { |
| 4766 var wrappedSubmit = form.submit = function() { |
| 4767 save(); |
| 4768 form.submit = realSubmit; |
| 4769 form.submit(); |
| 4770 form.submit = wrappedSubmit; |
| 4771 }; |
| 4772 } catch(e) {} |
| 4773 } |
| 4774 } |
| 4775 |
| 4776 textarea.style.display = "none"; |
| 4777 var cm = CodeMirror(function(node) { |
| 4778 textarea.parentNode.insertBefore(node, textarea.nextSibling); |
| 4779 }, options); |
| 4780 cm.save = save; |
| 4781 cm.getTextArea = function() { return textarea; }; |
| 4782 cm.toTextArea = function() { |
| 4783 save(); |
| 4784 textarea.parentNode.removeChild(cm.getWrapperElement()); |
| 4785 textarea.style.display = ""; |
| 4786 if (textarea.form) { |
| 4787 off(textarea.form, "submit", save); |
| 4788 if (typeof textarea.form.submit == "function") |
| 4789 textarea.form.submit = realSubmit; |
| 4790 } |
| 4791 }; |
| 4792 return cm; |
| 4793 }; |
| 4794 |
| 4795 // STRING STREAM |
| 4796 |
| 4797 // Fed to the mode parsers, provides helper functions to make |
| 4798 // parsers more succinct. |
| 4799 |
| 4800 var StringStream = CodeMirror.StringStream = function(string, tabSize) { |
| 4801 this.pos = this.start = 0; |
| 4802 this.string = string; |
| 4803 this.tabSize = tabSize || 8; |
| 4804 this.lastColumnPos = this.lastColumnValue = 0; |
| 4805 this.lineStart = 0; |
| 4806 }; |
| 4807 |
| 4808 StringStream.prototype = { |
| 4809 eol: function() {return this.pos >= this.string.length;}, |
| 4810 sol: function() {return this.pos == this.lineStart;}, |
| 4811 peek: function() {return this.string.charAt(this.pos) || undefined;}, |
| 4812 next: function() { |
| 4813 if (this.pos < this.string.length) |
| 4814 return this.string.charAt(this.pos++); |
| 4815 }, |
| 4816 eat: function(match) { |
| 4817 var ch = this.string.charAt(this.pos); |
| 4818 if (typeof match == "string") var ok = ch == match; |
| 4819 else var ok = ch && (match.test ? match.test(ch) : match(ch)); |
| 4820 if (ok) {++this.pos; return ch;} |
| 4821 }, |
| 4822 eatWhile: function(match) { |
| 4823 var start = this.pos; |
| 4824 while (this.eat(match)){} |
| 4825 return this.pos > start; |
| 4826 }, |
| 4827 eatSpace: function() { |
| 4828 var start = this.pos; |
| 4829 while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos; |
| 4830 return this.pos > start; |
| 4831 }, |
| 4832 skipToEnd: function() {this.pos = this.string.length;}, |
| 4833 skipTo: function(ch) { |
| 4834 var found = this.string.indexOf(ch, this.pos); |
| 4835 if (found > -1) {this.pos = found; return true;} |
| 4836 }, |
| 4837 backUp: function(n) {this.pos -= n;}, |
| 4838 column: function() { |
| 4839 if (this.lastColumnPos < this.start) { |
| 4840 this.lastColumnValue = countColumn(this.string, this.start, this.tabSize
, this.lastColumnPos, this.lastColumnValue); |
| 4841 this.lastColumnPos = this.start; |
| 4842 } |
| 4843 return this.lastColumnValue - (this.lineStart ? countColumn(this.string, t
his.lineStart, this.tabSize) : 0); |
| 4844 }, |
| 4845 indentation: function() { |
| 4846 return countColumn(this.string, null, this.tabSize) - |
| 4847 (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize)
: 0); |
| 4848 }, |
| 4849 match: function(pattern, consume, caseInsensitive) { |
| 4850 if (typeof pattern == "string") { |
| 4851 var cased = function(str) {return caseInsensitive ? str.toLowerCase() :
str;}; |
| 4852 var substr = this.string.substr(this.pos, pattern.length); |
| 4853 if (cased(substr) == cased(pattern)) { |
| 4854 if (consume !== false) this.pos += pattern.length; |
| 4855 return true; |
| 4856 } |
| 4857 } else { |
| 4858 var match = this.string.slice(this.pos).match(pattern); |
| 4859 if (match && match.index > 0) return null; |
| 4860 if (match && consume !== false) this.pos += match[0].length; |
| 4861 return match; |
| 4862 } |
| 4863 }, |
| 4864 current: function(){return this.string.slice(this.start, this.pos);}, |
| 4865 hideFirstChars: function(n, inner) { |
| 4866 this.lineStart += n; |
| 4867 try { return inner(); } |
| 4868 finally { this.lineStart -= n; } |
| 4869 } |
| 4870 }; |
| 4871 |
| 4872 // TEXTMARKERS |
| 4873 |
| 4874 // Created with markText and setBookmark methods. A TextMarker is a |
| 4875 // handle that can be used to clear or find a marked position in the |
| 4876 // document. Line objects hold arrays (markedSpans) containing |
| 4877 // {from, to, marker} object pointing to such marker objects, and |
| 4878 // indicating that such a marker is present on that line. Multiple |
| 4879 // lines may point to the same marker when it spans across lines. |
| 4880 // The spans will have null for their from/to properties when the |
| 4881 // marker continues beyond the start/end of the line. Markers have |
| 4882 // links back to the lines they currently touch. |
| 4883 |
| 4884 var TextMarker = CodeMirror.TextMarker = function(doc, type) { |
| 4885 this.lines = []; |
| 4886 this.type = type; |
| 4887 this.doc = doc; |
| 4888 }; |
| 4889 eventMixin(TextMarker); |
| 4890 |
| 4891 // Clear the marker. |
| 4892 TextMarker.prototype.clear = function() { |
| 4893 if (this.explicitlyCleared) return; |
| 4894 var cm = this.doc.cm, withOp = cm && !cm.curOp; |
| 4895 if (withOp) startOperation(cm); |
| 4896 if (hasHandler(this, "clear")) { |
| 4897 var found = this.find(); |
| 4898 if (found) signalLater(this, "clear", found.from, found.to); |
| 4899 } |
| 4900 var min = null, max = null; |
| 4901 for (var i = 0; i < this.lines.length; ++i) { |
| 4902 var line = this.lines[i]; |
| 4903 var span = getMarkedSpanFor(line.markedSpans, this); |
| 4904 if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text"); |
| 4905 else if (cm) { |
| 4906 if (span.to != null) max = lineNo(line); |
| 4907 if (span.from != null) min = lineNo(line); |
| 4908 } |
| 4909 line.markedSpans = removeMarkedSpan(line.markedSpans, span); |
| 4910 if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) &
& cm) |
| 4911 updateLineHeight(line, textHeight(cm.display)); |
| 4912 } |
| 4913 if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < th
is.lines.length; ++i) { |
| 4914 var visual = visualLine(this.lines[i]), len = lineLength(visual); |
| 4915 if (len > cm.display.maxLineLength) { |
| 4916 cm.display.maxLine = visual; |
| 4917 cm.display.maxLineLength = len; |
| 4918 cm.display.maxLineChanged = true; |
| 4919 } |
| 4920 } |
| 4921 |
| 4922 if (min != null && cm && this.collapsed) regChange(cm, min, max + 1); |
| 4923 this.lines.length = 0; |
| 4924 this.explicitlyCleared = true; |
| 4925 if (this.atomic && this.doc.cantEdit) { |
| 4926 this.doc.cantEdit = false; |
| 4927 if (cm) reCheckSelection(cm.doc); |
| 4928 } |
| 4929 if (cm) signalLater(cm, "markerCleared", cm, this); |
| 4930 if (withOp) endOperation(cm); |
| 4931 if (this.parent) this.parent.clear(); |
| 4932 }; |
| 4933 |
| 4934 // Find the position of the marker in the document. Returns a {from, |
| 4935 // to} object by default. Side can be passed to get a specific side |
| 4936 // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the |
| 4937 // Pos objects returned contain a line object, rather than a line |
| 4938 // number (used to prevent looking up the same line twice). |
| 4939 TextMarker.prototype.find = function(side, lineObj) { |
| 4940 if (side == null && this.type == "bookmark") side = 1; |
| 4941 var from, to; |
| 4942 for (var i = 0; i < this.lines.length; ++i) { |
| 4943 var line = this.lines[i]; |
| 4944 var span = getMarkedSpanFor(line.markedSpans, this); |
| 4945 if (span.from != null) { |
| 4946 from = Pos(lineObj ? line : lineNo(line), span.from); |
| 4947 if (side == -1) return from; |
| 4948 } |
| 4949 if (span.to != null) { |
| 4950 to = Pos(lineObj ? line : lineNo(line), span.to); |
| 4951 if (side == 1) return to; |
| 4952 } |
| 4953 } |
| 4954 return from && {from: from, to: to}; |
| 4955 }; |
| 4956 |
| 4957 // Signals that the marker's widget changed, and surrounding layout |
| 4958 // should be recomputed. |
| 4959 TextMarker.prototype.changed = function() { |
| 4960 var pos = this.find(-1, true), widget = this, cm = this.doc.cm; |
| 4961 if (!pos || !cm) return; |
| 4962 runInOp(cm, function() { |
| 4963 var line = pos.line, lineN = lineNo(pos.line); |
| 4964 var view = findViewForLine(cm, lineN); |
| 4965 if (view) { |
| 4966 clearLineMeasurementCacheFor(view); |
| 4967 cm.curOp.selectionChanged = cm.curOp.forceUpdate = true; |
| 4968 } |
| 4969 cm.curOp.updateMaxLine = true; |
| 4970 if (!lineIsHidden(widget.doc, line) && widget.height != null) { |
| 4971 var oldHeight = widget.height; |
| 4972 widget.height = null; |
| 4973 var dHeight = widgetHeight(widget) - oldHeight; |
| 4974 if (dHeight) |
| 4975 updateLineHeight(line, line.height + dHeight); |
| 4976 } |
| 4977 }); |
| 4978 }; |
| 4979 |
| 4980 TextMarker.prototype.attachLine = function(line) { |
| 4981 if (!this.lines.length && this.doc.cm) { |
| 4982 var op = this.doc.cm.curOp; |
| 4983 if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1) |
| 4984 (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); |
| 4985 } |
| 4986 this.lines.push(line); |
| 4987 }; |
| 4988 TextMarker.prototype.detachLine = function(line) { |
| 4989 this.lines.splice(indexOf(this.lines, line), 1); |
| 4990 if (!this.lines.length && this.doc.cm) { |
| 4991 var op = this.doc.cm.curOp; |
| 4992 (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this); |
| 4993 } |
| 4994 }; |
| 4995 |
| 4996 // Collapsed markers have unique ids, in order to be able to order |
| 4997 // them, which is needed for uniquely determining an outer marker |
| 4998 // when they overlap (they may nest, but not partially overlap). |
| 4999 var nextMarkerId = 0; |
| 5000 |
| 5001 // Create a marker, wire it up to the right lines, and |
| 5002 function markText(doc, from, to, options, type) { |
| 5003 // Shared markers (across linked documents) are handled separately |
| 5004 // (markTextShared will call out to this again, once per |
| 5005 // document). |
| 5006 if (options && options.shared) return markTextShared(doc, from, to, options,
type); |
| 5007 // Ensure we are in an operation. |
| 5008 if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, t
o, options, type); |
| 5009 |
| 5010 var marker = new TextMarker(doc, type), diff = cmp(from, to); |
| 5011 if (options) copyObj(options, marker, false); |
| 5012 // Don't connect empty markers unless clearWhenEmpty is false |
| 5013 if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false) |
| 5014 return marker; |
| 5015 if (marker.replacedWith) { |
| 5016 // Showing up as a widget implies collapsed (widget replaces text) |
| 5017 marker.collapsed = true; |
| 5018 marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget"
); |
| 5019 if (!options.handleMouseEvents) marker.widgetNode.ignoreEvents = true; |
| 5020 if (options.insertLeft) marker.widgetNode.insertLeft = true; |
| 5021 } |
| 5022 if (marker.collapsed) { |
| 5023 if (conflictingCollapsedRange(doc, from.line, from, to, marker) || |
| 5024 from.line != to.line && conflictingCollapsedRange(doc, to.line, from,
to, marker)) |
| 5025 throw new Error("Inserting collapsed marker partially overlapping an exi
sting one"); |
| 5026 sawCollapsedSpans = true; |
| 5027 } |
| 5028 |
| 5029 if (marker.addToHistory) |
| 5030 addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel,
NaN); |
| 5031 |
| 5032 var curLine = from.line, cm = doc.cm, updateMaxLine; |
| 5033 doc.iter(curLine, to.line + 1, function(line) { |
| 5034 if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line)
== cm.display.maxLine) |
| 5035 updateMaxLine = true; |
| 5036 if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0); |
| 5037 addMarkedSpan(line, new MarkedSpan(marker, |
| 5038 curLine == from.line ? from.ch : null, |
| 5039 curLine == to.line ? to.ch : null)); |
| 5040 ++curLine; |
| 5041 }); |
| 5042 // lineIsHidden depends on the presence of the spans, so needs a second pass |
| 5043 if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) { |
| 5044 if (lineIsHidden(doc, line)) updateLineHeight(line, 0); |
| 5045 }); |
| 5046 |
| 5047 if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker
.clear(); }); |
| 5048 |
| 5049 if (marker.readOnly) { |
| 5050 sawReadOnlySpans = true; |
| 5051 if (doc.history.done.length || doc.history.undone.length) |
| 5052 doc.clearHistory(); |
| 5053 } |
| 5054 if (marker.collapsed) { |
| 5055 marker.id = ++nextMarkerId; |
| 5056 marker.atomic = true; |
| 5057 } |
| 5058 if (cm) { |
| 5059 // Sync editor state |
| 5060 if (updateMaxLine) cm.curOp.updateMaxLine = true; |
| 5061 if (marker.collapsed) |
| 5062 regChange(cm, from.line, to.line + 1); |
| 5063 else if (marker.className || marker.title || marker.startStyle || marker.e
ndStyle) |
| 5064 for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text"); |
| 5065 if (marker.atomic) reCheckSelection(cm.doc); |
| 5066 signalLater(cm, "markerAdded", cm, marker); |
| 5067 } |
| 5068 return marker; |
| 5069 } |
| 5070 |
| 5071 // SHARED TEXTMARKERS |
| 5072 |
| 5073 // A shared marker spans multiple linked documents. It is |
| 5074 // implemented as a meta-marker-object controlling multiple normal |
| 5075 // markers. |
| 5076 var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary
) { |
| 5077 this.markers = markers; |
| 5078 this.primary = primary; |
| 5079 for (var i = 0; i < markers.length; ++i) |
| 5080 markers[i].parent = this; |
| 5081 }; |
| 5082 eventMixin(SharedTextMarker); |
| 5083 |
| 5084 SharedTextMarker.prototype.clear = function() { |
| 5085 if (this.explicitlyCleared) return; |
| 5086 this.explicitlyCleared = true; |
| 5087 for (var i = 0; i < this.markers.length; ++i) |
| 5088 this.markers[i].clear(); |
| 5089 signalLater(this, "clear"); |
| 5090 }; |
| 5091 SharedTextMarker.prototype.find = function(side, lineObj) { |
| 5092 return this.primary.find(side, lineObj); |
| 5093 }; |
| 5094 |
| 5095 function markTextShared(doc, from, to, options, type) { |
| 5096 options = copyObj(options); |
| 5097 options.shared = false; |
| 5098 var markers = [markText(doc, from, to, options, type)], primary = markers[0]
; |
| 5099 var widget = options.widgetNode; |
| 5100 linkedDocs(doc, function(doc) { |
| 5101 if (widget) options.widgetNode = widget.cloneNode(true); |
| 5102 markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options,
type)); |
| 5103 for (var i = 0; i < doc.linked.length; ++i) |
| 5104 if (doc.linked[i].isParent) return; |
| 5105 primary = lst(markers); |
| 5106 }); |
| 5107 return new SharedTextMarker(markers, primary); |
| 5108 } |
| 5109 |
| 5110 function findSharedMarkers(doc) { |
| 5111 return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), |
| 5112 function(m) { return m.parent; }); |
| 5113 } |
| 5114 |
| 5115 function copySharedMarkers(doc, markers) { |
| 5116 for (var i = 0; i < markers.length; i++) { |
| 5117 var marker = markers[i], pos = marker.find(); |
| 5118 var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to); |
| 5119 if (cmp(mFrom, mTo)) { |
| 5120 var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.t
ype); |
| 5121 marker.markers.push(subMark); |
| 5122 subMark.parent = marker; |
| 5123 } |
| 5124 } |
| 5125 } |
| 5126 |
| 5127 function detachSharedMarkers(markers) { |
| 5128 for (var i = 0; i < markers.length; i++) { |
| 5129 var marker = markers[i], linked = [marker.primary.doc];; |
| 5130 linkedDocs(marker.primary.doc, function(d) { linked.push(d); }); |
| 5131 for (var j = 0; j < marker.markers.length; j++) { |
| 5132 var subMarker = marker.markers[j]; |
| 5133 if (indexOf(linked, subMarker.doc) == -1) { |
| 5134 subMarker.parent = null; |
| 5135 marker.markers.splice(j--, 1); |
| 5136 } |
| 5137 } |
| 5138 } |
| 5139 } |
| 5140 |
| 5141 // TEXTMARKER SPANS |
| 5142 |
| 5143 function MarkedSpan(marker, from, to) { |
| 5144 this.marker = marker; |
| 5145 this.from = from; this.to = to; |
| 5146 } |
| 5147 |
| 5148 // Search an array of spans for a span matching the given marker. |
| 5149 function getMarkedSpanFor(spans, marker) { |
| 5150 if (spans) for (var i = 0; i < spans.length; ++i) { |
| 5151 var span = spans[i]; |
| 5152 if (span.marker == marker) return span; |
| 5153 } |
| 5154 } |
| 5155 // Remove a span from an array, returning undefined if no spans are |
| 5156 // left (we don't store arrays for lines without spans). |
| 5157 function removeMarkedSpan(spans, span) { |
| 5158 for (var r, i = 0; i < spans.length; ++i) |
| 5159 if (spans[i] != span) (r || (r = [])).push(spans[i]); |
| 5160 return r; |
| 5161 } |
| 5162 // Add a span to a line. |
| 5163 function addMarkedSpan(line, span) { |
| 5164 line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [spa
n]; |
| 5165 span.marker.attachLine(line); |
| 5166 } |
| 5167 |
| 5168 // Used for the algorithm that adjusts markers for a change in the |
| 5169 // document. These functions cut an array of spans at a given |
| 5170 // character position, returning an array of remaining chunks (or |
| 5171 // undefined if nothing remains). |
| 5172 function markedSpansBefore(old, startCh, isInsert) { |
| 5173 if (old) for (var i = 0, nw; i < old.length; ++i) { |
| 5174 var span = old[i], marker = span.marker; |
| 5175 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from
<= startCh : span.from < startCh); |
| 5176 if (startsBefore || span.from == startCh && marker.type == "bookmark" && (
!isInsert || !span.marker.insertLeft)) { |
| 5177 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= s
tartCh : span.to > startCh); |
| 5178 (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? nul
l : span.to)); |
| 5179 } |
| 5180 } |
| 5181 return nw; |
| 5182 } |
| 5183 function markedSpansAfter(old, endCh, isInsert) { |
| 5184 if (old) for (var i = 0, nw; i < old.length; ++i) { |
| 5185 var span = old[i], marker = span.marker; |
| 5186 var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= end
Ch : span.to > endCh); |
| 5187 if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isIn
sert || span.marker.insertLeft)) { |
| 5188 var startsBefore = span.from == null || (marker.inclusiveLeft ? span.fro
m <= endCh : span.from < endCh); |
| 5189 (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span
.from - endCh, |
| 5190 span.to == null ? null : span.to -
endCh)); |
| 5191 } |
| 5192 } |
| 5193 return nw; |
| 5194 } |
| 5195 |
| 5196 // Given a change object, compute the new set of marker spans that |
| 5197 // cover the line in which the change took place. Removes spans |
| 5198 // entirely within the change, reconnects spans belonging to the |
| 5199 // same marker that appear on both sides of the change, and cuts off |
| 5200 // spans partially within the change. Returns an array of span |
| 5201 // arrays with one element for each line in (after) the change. |
| 5202 function stretchSpansOverChange(doc, change) { |
| 5203 var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.lin
e).markedSpans; |
| 5204 var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).ma
rkedSpans; |
| 5205 if (!oldFirst && !oldLast) return null; |
| 5206 |
| 5207 var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.fr
om, change.to) == 0; |
| 5208 // Get the spans that 'stick out' on both sides |
| 5209 var first = markedSpansBefore(oldFirst, startCh, isInsert); |
| 5210 var last = markedSpansAfter(oldLast, endCh, isInsert); |
| 5211 |
| 5212 // Next, merge those two ends |
| 5213 var sameLine = change.text.length == 1, offset = lst(change.text).length + (
sameLine ? startCh : 0); |
| 5214 if (first) { |
| 5215 // Fix up .to properties of first |
| 5216 for (var i = 0; i < first.length; ++i) { |
| 5217 var span = first[i]; |
| 5218 if (span.to == null) { |
| 5219 var found = getMarkedSpanFor(last, span.marker); |
| 5220 if (!found) span.to = startCh; |
| 5221 else if (sameLine) span.to = found.to == null ? null : found.to + offs
et; |
| 5222 } |
| 5223 } |
| 5224 } |
| 5225 if (last) { |
| 5226 // Fix up .from in last (or move them into first in case of sameLine) |
| 5227 for (var i = 0; i < last.length; ++i) { |
| 5228 var span = last[i]; |
| 5229 if (span.to != null) span.to += offset; |
| 5230 if (span.from == null) { |
| 5231 var found = getMarkedSpanFor(first, span.marker); |
| 5232 if (!found) { |
| 5233 span.from = offset; |
| 5234 if (sameLine) (first || (first = [])).push(span); |
| 5235 } |
| 5236 } else { |
| 5237 span.from += offset; |
| 5238 if (sameLine) (first || (first = [])).push(span); |
| 5239 } |
| 5240 } |
| 5241 } |
| 5242 // Make sure we didn't create any zero-length spans |
| 5243 if (first) first = clearEmptySpans(first); |
| 5244 if (last && last != first) last = clearEmptySpans(last); |
| 5245 |
| 5246 var newMarkers = [first]; |
| 5247 if (!sameLine) { |
| 5248 // Fill gap with whole-line-spans |
| 5249 var gap = change.text.length - 2, gapMarkers; |
| 5250 if (gap > 0 && first) |
| 5251 for (var i = 0; i < first.length; ++i) |
| 5252 if (first[i].to == null) |
| 5253 (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marke
r, null, null)); |
| 5254 for (var i = 0; i < gap; ++i) |
| 5255 newMarkers.push(gapMarkers); |
| 5256 newMarkers.push(last); |
| 5257 } |
| 5258 return newMarkers; |
| 5259 } |
| 5260 |
| 5261 // Remove spans that are empty and don't have a clearWhenEmpty |
| 5262 // option of false. |
| 5263 function clearEmptySpans(spans) { |
| 5264 for (var i = 0; i < spans.length; ++i) { |
| 5265 var span = spans[i]; |
| 5266 if (span.from != null && span.from == span.to && span.marker.clearWhenEmpt
y !== false) |
| 5267 spans.splice(i--, 1); |
| 5268 } |
| 5269 if (!spans.length) return null; |
| 5270 return spans; |
| 5271 } |
| 5272 |
| 5273 // Used for un/re-doing changes from the history. Combines the |
| 5274 // result of computing the existing spans with the set of spans that |
| 5275 // existed in the history (so that deleting around a span and then |
| 5276 // undoing brings back the span). |
| 5277 function mergeOldSpans(doc, change) { |
| 5278 var old = getOldSpans(doc, change); |
| 5279 var stretched = stretchSpansOverChange(doc, change); |
| 5280 if (!old) return stretched; |
| 5281 if (!stretched) return old; |
| 5282 |
| 5283 for (var i = 0; i < old.length; ++i) { |
| 5284 var oldCur = old[i], stretchCur = stretched[i]; |
| 5285 if (oldCur && stretchCur) { |
| 5286 spans: for (var j = 0; j < stretchCur.length; ++j) { |
| 5287 var span = stretchCur[j]; |
| 5288 for (var k = 0; k < oldCur.length; ++k) |
| 5289 if (oldCur[k].marker == span.marker) continue spans; |
| 5290 oldCur.push(span); |
| 5291 } |
| 5292 } else if (stretchCur) { |
| 5293 old[i] = stretchCur; |
| 5294 } |
| 5295 } |
| 5296 return old; |
| 5297 } |
| 5298 |
| 5299 // Used to 'clip' out readOnly ranges when making a change. |
| 5300 function removeReadOnlyRanges(doc, from, to) { |
| 5301 var markers = null; |
| 5302 doc.iter(from.line, to.line + 1, function(line) { |
| 5303 if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) { |
| 5304 var mark = line.markedSpans[i].marker; |
| 5305 if (mark.readOnly && (!markers || indexOf(markers, mark) == -1)) |
| 5306 (markers || (markers = [])).push(mark); |
| 5307 } |
| 5308 }); |
| 5309 if (!markers) return null; |
| 5310 var parts = [{from: from, to: to}]; |
| 5311 for (var i = 0; i < markers.length; ++i) { |
| 5312 var mk = markers[i], m = mk.find(0); |
| 5313 for (var j = 0; j < parts.length; ++j) { |
| 5314 var p = parts[j]; |
| 5315 if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue; |
| 5316 var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to
); |
| 5317 if (dfrom < 0 || !mk.inclusiveLeft && !dfrom) |
| 5318 newParts.push({from: p.from, to: m.from}); |
| 5319 if (dto > 0 || !mk.inclusiveRight && !dto) |
| 5320 newParts.push({from: m.to, to: p.to}); |
| 5321 parts.splice.apply(parts, newParts); |
| 5322 j += newParts.length - 1; |
| 5323 } |
| 5324 } |
| 5325 return parts; |
| 5326 } |
| 5327 |
| 5328 // Connect or disconnect spans from a line. |
| 5329 function detachMarkedSpans(line) { |
| 5330 var spans = line.markedSpans; |
| 5331 if (!spans) return; |
| 5332 for (var i = 0; i < spans.length; ++i) |
| 5333 spans[i].marker.detachLine(line); |
| 5334 line.markedSpans = null; |
| 5335 } |
| 5336 function attachMarkedSpans(line, spans) { |
| 5337 if (!spans) return; |
| 5338 for (var i = 0; i < spans.length; ++i) |
| 5339 spans[i].marker.attachLine(line); |
| 5340 line.markedSpans = spans; |
| 5341 } |
| 5342 |
| 5343 // Helpers used when computing which overlapping collapsed span |
| 5344 // counts as the larger one. |
| 5345 function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; } |
| 5346 function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; } |
| 5347 |
| 5348 // Returns a number indicating which of two overlapping collapsed |
| 5349 // spans is larger (and thus includes the other). Falls back to |
| 5350 // comparing ids when the spans cover exactly the same range. |
| 5351 function compareCollapsedMarkers(a, b) { |
| 5352 var lenDiff = a.lines.length - b.lines.length; |
| 5353 if (lenDiff != 0) return lenDiff; |
| 5354 var aPos = a.find(), bPos = b.find(); |
| 5355 var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b); |
| 5356 if (fromCmp) return -fromCmp; |
| 5357 var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b); |
| 5358 if (toCmp) return toCmp; |
| 5359 return b.id - a.id; |
| 5360 } |
| 5361 |
| 5362 // Find out whether a line ends or starts in a collapsed span. If |
| 5363 // so, return the marker for that span. |
| 5364 function collapsedSpanAtSide(line, start) { |
| 5365 var sps = sawCollapsedSpans && line.markedSpans, found; |
| 5366 if (sps) for (var sp, i = 0; i < sps.length; ++i) { |
| 5367 sp = sps[i]; |
| 5368 if (sp.marker.collapsed && (start ? sp.from : sp.to) == null && |
| 5369 (!found || compareCollapsedMarkers(found, sp.marker) < 0)) |
| 5370 found = sp.marker; |
| 5371 } |
| 5372 return found; |
| 5373 } |
| 5374 function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true);
} |
| 5375 function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); } |
| 5376 |
| 5377 // Test whether there exists a collapsed span that partially |
| 5378 // overlaps (covers the start or end, but not both) of a new span. |
| 5379 // Such overlap is not allowed. |
| 5380 function conflictingCollapsedRange(doc, lineNo, from, to, marker) { |
| 5381 var line = getLine(doc, lineNo); |
| 5382 var sps = sawCollapsedSpans && line.markedSpans; |
| 5383 if (sps) for (var i = 0; i < sps.length; ++i) { |
| 5384 var sp = sps[i]; |
| 5385 if (!sp.marker.collapsed) continue; |
| 5386 var found = sp.marker.find(0); |
| 5387 var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(ma
rker); |
| 5388 var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker
); |
| 5389 if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue; |
| 5390 if (fromCmp <= 0 && (cmp(found.to, from) || extraRight(sp.marker) - extraL
eft(marker)) > 0 || |
| 5391 fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRi
ght(marker)) < 0) |
| 5392 return true; |
| 5393 } |
| 5394 } |
| 5395 |
| 5396 // A visual line is a line as drawn on the screen. Folding, for |
| 5397 // example, can cause multiple logical lines to appear on the same |
| 5398 // visual line. This finds the start of the visual line that the |
| 5399 // given line is part of (usually that is the line itself). |
| 5400 function visualLine(line) { |
| 5401 var merged; |
| 5402 while (merged = collapsedSpanAtStart(line)) |
| 5403 line = merged.find(-1, true).line; |
| 5404 return line; |
| 5405 } |
| 5406 |
| 5407 // Returns an array of logical lines that continue the visual line |
| 5408 // started by the argument, or undefined if there are no such lines. |
| 5409 function visualLineContinued(line) { |
| 5410 var merged, lines; |
| 5411 while (merged = collapsedSpanAtEnd(line)) { |
| 5412 line = merged.find(1, true).line; |
| 5413 (lines || (lines = [])).push(line); |
| 5414 } |
| 5415 return lines; |
| 5416 } |
| 5417 |
| 5418 // Get the line number of the start of the visual line that the |
| 5419 // given line number is part of. |
| 5420 function visualLineNo(doc, lineN) { |
| 5421 var line = getLine(doc, lineN), vis = visualLine(line); |
| 5422 if (line == vis) return lineN; |
| 5423 return lineNo(vis); |
| 5424 } |
| 5425 // Get the line number of the start of the next visual line after |
| 5426 // the given line. |
| 5427 function visualLineEndNo(doc, lineN) { |
| 5428 if (lineN > doc.lastLine()) return lineN; |
| 5429 var line = getLine(doc, lineN), merged; |
| 5430 if (!lineIsHidden(doc, line)) return lineN; |
| 5431 while (merged = collapsedSpanAtEnd(line)) |
| 5432 line = merged.find(1, true).line; |
| 5433 return lineNo(line) + 1; |
| 5434 } |
| 5435 |
| 5436 // Compute whether a line is hidden. Lines count as hidden when they |
| 5437 // are part of a visual line that starts with another line, or when |
| 5438 // they are entirely covered by collapsed, non-widget span. |
| 5439 function lineIsHidden(doc, line) { |
| 5440 var sps = sawCollapsedSpans && line.markedSpans; |
| 5441 if (sps) for (var sp, i = 0; i < sps.length; ++i) { |
| 5442 sp = sps[i]; |
| 5443 if (!sp.marker.collapsed) continue; |
| 5444 if (sp.from == null) return true; |
| 5445 if (sp.marker.widgetNode) continue; |
| 5446 if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line
, sp)) |
| 5447 return true; |
| 5448 } |
| 5449 } |
| 5450 function lineIsHiddenInner(doc, line, span) { |
| 5451 if (span.to == null) { |
| 5452 var end = span.marker.find(1, true); |
| 5453 return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSp
ans, span.marker)); |
| 5454 } |
| 5455 if (span.marker.inclusiveRight && span.to == line.text.length) |
| 5456 return true; |
| 5457 for (var sp, i = 0; i < line.markedSpans.length; ++i) { |
| 5458 sp = line.markedSpans[i]; |
| 5459 if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to && |
| 5460 (sp.to == null || sp.to != span.from) && |
| 5461 (sp.marker.inclusiveLeft || span.marker.inclusiveRight) && |
| 5462 lineIsHiddenInner(doc, line, sp)) return true; |
| 5463 } |
| 5464 } |
| 5465 |
| 5466 // LINE WIDGETS |
| 5467 |
| 5468 // Line widgets are block elements displayed above or below a line. |
| 5469 |
| 5470 var LineWidget = CodeMirror.LineWidget = function(cm, node, options) { |
| 5471 if (options) for (var opt in options) if (options.hasOwnProperty(opt)) |
| 5472 this[opt] = options[opt]; |
| 5473 this.cm = cm; |
| 5474 this.node = node; |
| 5475 }; |
| 5476 eventMixin(LineWidget); |
| 5477 |
| 5478 function adjustScrollWhenAboveVisible(cm, line, diff) { |
| 5479 if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollT
op)) |
| 5480 addToScrollPos(cm, null, diff); |
| 5481 } |
| 5482 |
| 5483 LineWidget.prototype.clear = function() { |
| 5484 var cm = this.cm, ws = this.line.widgets, line = this.line, no = lineNo(line
); |
| 5485 if (no == null || !ws) return; |
| 5486 for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1); |
| 5487 if (!ws.length) line.widgets = null; |
| 5488 var height = widgetHeight(this); |
| 5489 runInOp(cm, function() { |
| 5490 adjustScrollWhenAboveVisible(cm, line, -height); |
| 5491 regLineChange(cm, no, "widget"); |
| 5492 updateLineHeight(line, Math.max(0, line.height - height)); |
| 5493 }); |
| 5494 }; |
| 5495 LineWidget.prototype.changed = function() { |
| 5496 var oldH = this.height, cm = this.cm, line = this.line; |
| 5497 this.height = null; |
| 5498 var diff = widgetHeight(this) - oldH; |
| 5499 if (!diff) return; |
| 5500 runInOp(cm, function() { |
| 5501 cm.curOp.forceUpdate = true; |
| 5502 adjustScrollWhenAboveVisible(cm, line, diff); |
| 5503 updateLineHeight(line, line.height + diff); |
| 5504 }); |
| 5505 }; |
| 5506 |
| 5507 function widgetHeight(widget) { |
| 5508 if (widget.height != null) return widget.height; |
| 5509 if (!contains(document.body, widget.node)) |
| 5510 removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node],
null, "position: relative")); |
| 5511 return widget.height = widget.node.offsetHeight; |
| 5512 } |
| 5513 |
| 5514 function addLineWidget(cm, handle, node, options) { |
| 5515 var widget = new LineWidget(cm, node, options); |
| 5516 if (widget.noHScroll) cm.display.alignWidgets = true; |
| 5517 changeLine(cm, handle, "widget", function(line) { |
| 5518 var widgets = line.widgets || (line.widgets = []); |
| 5519 if (widget.insertAt == null) widgets.push(widget); |
| 5520 else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insert
At)), 0, widget); |
| 5521 widget.line = line; |
| 5522 if (!lineIsHidden(cm.doc, line)) { |
| 5523 var aboveVisible = heightAtLine(line) < cm.doc.scrollTop; |
| 5524 updateLineHeight(line, line.height + widgetHeight(widget)); |
| 5525 if (aboveVisible) addToScrollPos(cm, null, widget.height); |
| 5526 cm.curOp.forceUpdate = true; |
| 5527 } |
| 5528 return true; |
| 5529 }); |
| 5530 return widget; |
| 5531 } |
| 5532 |
| 5533 // LINE DATA STRUCTURE |
| 5534 |
| 5535 // Line objects. These hold state related to a line, including |
| 5536 // highlighting info (the styles array). |
| 5537 var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) { |
| 5538 this.text = text; |
| 5539 attachMarkedSpans(this, markedSpans); |
| 5540 this.height = estimateHeight ? estimateHeight(this) : 1; |
| 5541 }; |
| 5542 eventMixin(Line); |
| 5543 Line.prototype.lineNo = function() { return lineNo(this); }; |
| 5544 |
| 5545 // Change the content (text, markers) of a line. Automatically |
| 5546 // invalidates cached information and tries to re-estimate the |
| 5547 // line's height. |
| 5548 function updateLine(line, text, markedSpans, estimateHeight) { |
| 5549 line.text = text; |
| 5550 if (line.stateAfter) line.stateAfter = null; |
| 5551 if (line.styles) line.styles = null; |
| 5552 if (line.order != null) line.order = null; |
| 5553 detachMarkedSpans(line); |
| 5554 attachMarkedSpans(line, markedSpans); |
| 5555 var estHeight = estimateHeight ? estimateHeight(line) : 1; |
| 5556 if (estHeight != line.height) updateLineHeight(line, estHeight); |
| 5557 } |
| 5558 |
| 5559 // Detach a line from the document tree and its markers. |
| 5560 function cleanUpLine(line) { |
| 5561 line.parent = null; |
| 5562 detachMarkedSpans(line); |
| 5563 } |
| 5564 |
| 5565 function extractLineClasses(type, output) { |
| 5566 if (type) for (;;) { |
| 5567 var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/); |
| 5568 if (!lineClass) break; |
| 5569 type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineC
lass[0].length); |
| 5570 var prop = lineClass[1] ? "bgClass" : "textClass"; |
| 5571 if (output[prop] == null) |
| 5572 output[prop] = lineClass[2]; |
| 5573 else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output
[prop])) |
| 5574 output[prop] += " " + lineClass[2]; |
| 5575 } |
| 5576 return type; |
| 5577 } |
| 5578 |
| 5579 function callBlankLine(mode, state) { |
| 5580 if (mode.blankLine) return mode.blankLine(state); |
| 5581 if (!mode.innerMode) return; |
| 5582 var inner = CodeMirror.innerMode(mode, state); |
| 5583 if (inner.mode.blankLine) return inner.mode.blankLine(inner.state); |
| 5584 } |
| 5585 |
| 5586 function readToken(mode, stream, state) { |
| 5587 var style = mode.token(stream, state); |
| 5588 if (stream.pos <= stream.start) |
| 5589 throw new Error("Mode " + mode.name + " failed to advance stream."); |
| 5590 return style; |
| 5591 } |
| 5592 |
| 5593 // Run the given mode's parser over a line, calling f for each token. |
| 5594 function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) { |
| 5595 var flattenSpans = mode.flattenSpans; |
| 5596 if (flattenSpans == null) flattenSpans = cm.options.flattenSpans; |
| 5597 var curStart = 0, curStyle = null; |
| 5598 var stream = new StringStream(text, cm.options.tabSize), style; |
| 5599 if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses); |
| 5600 while (!stream.eol()) { |
| 5601 if (stream.pos > cm.options.maxHighlightLength) { |
| 5602 flattenSpans = false; |
| 5603 if (forceToEnd) processLine(cm, text, state, stream.pos); |
| 5604 stream.pos = text.length; |
| 5605 style = null; |
| 5606 } else { |
| 5607 style = extractLineClasses(readToken(mode, stream, state), lineClasses); |
| 5608 } |
| 5609 if (cm.options.addModeClass) { |
| 5610 var mName = CodeMirror.innerMode(mode, state).mode.name; |
| 5611 if (mName) style = "m-" + (style ? mName + " " + style : mName); |
| 5612 } |
| 5613 if (!flattenSpans || curStyle != style) { |
| 5614 if (curStart < stream.start) f(stream.start, curStyle); |
| 5615 curStart = stream.start; curStyle = style; |
| 5616 } |
| 5617 stream.start = stream.pos; |
| 5618 } |
| 5619 while (curStart < stream.pos) { |
| 5620 // Webkit seems to refuse to render text nodes longer than 57444 character
s |
| 5621 var pos = Math.min(stream.pos, curStart + 50000); |
| 5622 f(pos, curStyle); |
| 5623 curStart = pos; |
| 5624 } |
| 5625 } |
| 5626 |
| 5627 // Compute a style array (an array starting with a mode generation |
| 5628 // -- for invalidation -- followed by pairs of end positions and |
| 5629 // style strings), which is used to highlight the tokens on the |
| 5630 // line. |
| 5631 function highlightLine(cm, line, state, forceToEnd) { |
| 5632 // A styles array always starts with a number identifying the |
| 5633 // mode/overlays that it is based on (for easy invalidation). |
| 5634 var st = [cm.state.modeGen], lineClasses = {}; |
| 5635 // Compute the base array of styles |
| 5636 runMode(cm, line.text, cm.doc.mode, state, function(end, style) { |
| 5637 st.push(end, style); |
| 5638 }, lineClasses, forceToEnd); |
| 5639 |
| 5640 // Run overlays, adjust style array. |
| 5641 for (var o = 0; o < cm.state.overlays.length; ++o) { |
| 5642 var overlay = cm.state.overlays[o], i = 1, at = 0; |
| 5643 runMode(cm, line.text, overlay.mode, true, function(end, style) { |
| 5644 var start = i; |
| 5645 // Ensure there's a token end at the current position, and that i points
at it |
| 5646 while (at < end) { |
| 5647 var i_end = st[i]; |
| 5648 if (i_end > end) |
| 5649 st.splice(i, 1, end, st[i+1], i_end); |
| 5650 i += 2; |
| 5651 at = Math.min(end, i_end); |
| 5652 } |
| 5653 if (!style) return; |
| 5654 if (overlay.opaque) { |
| 5655 st.splice(start, i - start, end, "cm-overlay " + style); |
| 5656 i = start + 2; |
| 5657 } else { |
| 5658 for (; start < i; start += 2) { |
| 5659 var cur = st[start+1]; |
| 5660 st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style; |
| 5661 } |
| 5662 } |
| 5663 }, lineClasses); |
| 5664 } |
| 5665 |
| 5666 return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ?
lineClasses : null}; |
| 5667 } |
| 5668 |
| 5669 function getLineStyles(cm, line) { |
| 5670 if (!line.styles || line.styles[0] != cm.state.modeGen) { |
| 5671 var result = highlightLine(cm, line, line.stateAfter = getStateBefore(cm,
lineNo(line))); |
| 5672 line.styles = result.styles; |
| 5673 if (result.classes) line.styleClasses = result.classes; |
| 5674 else if (line.styleClasses) line.styleClasses = null; |
| 5675 } |
| 5676 return line.styles; |
| 5677 } |
| 5678 |
| 5679 // Lightweight form of highlight -- proceed over this line and |
| 5680 // update state, but don't save a style array. Used for lines that |
| 5681 // aren't currently visible. |
| 5682 function processLine(cm, text, state, startAt) { |
| 5683 var mode = cm.doc.mode; |
| 5684 var stream = new StringStream(text, cm.options.tabSize); |
| 5685 stream.start = stream.pos = startAt || 0; |
| 5686 if (text == "") callBlankLine(mode, state); |
| 5687 while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) { |
| 5688 readToken(mode, stream, state); |
| 5689 stream.start = stream.pos; |
| 5690 } |
| 5691 } |
| 5692 |
| 5693 // Convert a style as returned by a mode (either null, or a string |
| 5694 // containing one or more styles) to a CSS style. This is cached, |
| 5695 // and also looks for line-wide styles. |
| 5696 var styleToClassCache = {}, styleToClassCacheWithMode = {}; |
| 5697 function interpretTokenStyle(style, options) { |
| 5698 if (!style || /^\s*$/.test(style)) return null; |
| 5699 var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassC
ache; |
| 5700 return cache[style] || |
| 5701 (cache[style] = style.replace(/\S+/g, "cm-$&")); |
| 5702 } |
| 5703 |
| 5704 // Render the DOM representation of the text of a line. Also builds |
| 5705 // up a 'line map', which points at the DOM nodes that represent |
| 5706 // specific stretches of text, and is used by the measuring code. |
| 5707 // The returned object contains the DOM node, this map, and |
| 5708 // information about line-wide styles that were set by the mode. |
| 5709 function buildLineContent(cm, lineView) { |
| 5710 // The padding-right forces the element to have a 'border', which |
| 5711 // is needed on Webkit to be able to get line-level bounding |
| 5712 // rectangles for it (in measureChar). |
| 5713 var content = elt("span", null, null, webkit ? "padding-right: .1px" : null)
; |
| 5714 var builder = {pre: elt("pre", [content]), content: content, col: 0, pos: 0,
cm: cm}; |
| 5715 lineView.measure = {}; |
| 5716 |
| 5717 // Iterate over the logical lines that make up this visual line. |
| 5718 for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) { |
| 5719 var line = i ? lineView.rest[i - 1] : lineView.line, order; |
| 5720 builder.pos = 0; |
| 5721 builder.addToken = buildToken; |
| 5722 // Optionally wire in some hacks into the token-rendering |
| 5723 // algorithm, to deal with browser quirks. |
| 5724 if ((ie || webkit) && cm.getOption("lineWrapping")) |
| 5725 builder.addToken = buildTokenSplitSpaces(builder.addToken); |
| 5726 if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line))) |
| 5727 builder.addToken = buildTokenBadBidi(builder.addToken, order); |
| 5728 builder.map = []; |
| 5729 insertLineContent(line, builder, getLineStyles(cm, line)); |
| 5730 if (line.styleClasses) { |
| 5731 if (line.styleClasses.bgClass) |
| 5732 builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgCla
ss || ""); |
| 5733 if (line.styleClasses.textClass) |
| 5734 builder.textClass = joinClasses(line.styleClasses.textClass, builder.t
extClass || ""); |
| 5735 } |
| 5736 |
| 5737 // Ensure at least a single node is present, for measuring. |
| 5738 if (builder.map.length == 0) |
| 5739 builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.d
isplay.measure))); |
| 5740 |
| 5741 // Store the map and a cache object for the current logical line |
| 5742 if (i == 0) { |
| 5743 lineView.measure.map = builder.map; |
| 5744 lineView.measure.cache = {}; |
| 5745 } else { |
| 5746 (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map
); |
| 5747 (lineView.measure.caches || (lineView.measure.caches = [])).push({}); |
| 5748 } |
| 5749 } |
| 5750 |
| 5751 signal(cm, "renderLine", cm, lineView.line, builder.pre); |
| 5752 return builder; |
| 5753 } |
| 5754 |
| 5755 function defaultSpecialCharPlaceholder(ch) { |
| 5756 var token = elt("span", "\u2022", "cm-invalidchar"); |
| 5757 token.title = "\\u" + ch.charCodeAt(0).toString(16); |
| 5758 return token; |
| 5759 } |
| 5760 |
| 5761 // Build up the DOM representation for a single token, and add it to |
| 5762 // the line map. Takes care to render special characters separately. |
| 5763 function buildToken(builder, text, style, startStyle, endStyle, title) { |
| 5764 if (!text) return; |
| 5765 var special = builder.cm.options.specialChars, mustWrap = false; |
| 5766 if (!special.test(text)) { |
| 5767 builder.col += text.length; |
| 5768 var content = document.createTextNode(text); |
| 5769 builder.map.push(builder.pos, builder.pos + text.length, content); |
| 5770 if (ie_upto8) mustWrap = true; |
| 5771 builder.pos += text.length; |
| 5772 } else { |
| 5773 var content = document.createDocumentFragment(), pos = 0; |
| 5774 while (true) { |
| 5775 special.lastIndex = pos; |
| 5776 var m = special.exec(text); |
| 5777 var skipped = m ? m.index - pos : text.length - pos; |
| 5778 if (skipped) { |
| 5779 var txt = document.createTextNode(text.slice(pos, pos + skipped)); |
| 5780 if (ie_upto8) content.appendChild(elt("span", [txt])); |
| 5781 else content.appendChild(txt); |
| 5782 builder.map.push(builder.pos, builder.pos + skipped, txt); |
| 5783 builder.col += skipped; |
| 5784 builder.pos += skipped; |
| 5785 } |
| 5786 if (!m) break; |
| 5787 pos += skipped + 1; |
| 5788 if (m[0] == "\t") { |
| 5789 var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder
.col % tabSize; |
| 5790 var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"
)); |
| 5791 builder.col += tabWidth; |
| 5792 } else { |
| 5793 var txt = builder.cm.options.specialCharPlaceholder(m[0]); |
| 5794 if (ie_upto8) content.appendChild(elt("span", [txt])); |
| 5795 else content.appendChild(txt); |
| 5796 builder.col += 1; |
| 5797 } |
| 5798 builder.map.push(builder.pos, builder.pos + 1, txt); |
| 5799 builder.pos++; |
| 5800 } |
| 5801 } |
| 5802 if (style || startStyle || endStyle || mustWrap) { |
| 5803 var fullStyle = style || ""; |
| 5804 if (startStyle) fullStyle += startStyle; |
| 5805 if (endStyle) fullStyle += endStyle; |
| 5806 var token = elt("span", [content], fullStyle); |
| 5807 if (title) token.title = title; |
| 5808 return builder.content.appendChild(token); |
| 5809 } |
| 5810 builder.content.appendChild(content); |
| 5811 } |
| 5812 |
| 5813 function buildTokenSplitSpaces(inner) { |
| 5814 function split(old) { |
| 5815 var out = " "; |
| 5816 for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0"; |
| 5817 out += " "; |
| 5818 return out; |
| 5819 } |
| 5820 return function(builder, text, style, startStyle, endStyle, title) { |
| 5821 inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle,
title); |
| 5822 }; |
| 5823 } |
| 5824 |
| 5825 // Work around nonsense dimensions being reported for stretches of |
| 5826 // right-to-left text. |
| 5827 function buildTokenBadBidi(inner, order) { |
| 5828 return function(builder, text, style, startStyle, endStyle, title) { |
| 5829 style = style ? style + " cm-force-border" : "cm-force-border"; |
| 5830 var start = builder.pos, end = start + text.length; |
| 5831 for (;;) { |
| 5832 // Find the part that overlaps with the start of this text |
| 5833 for (var i = 0; i < order.length; i++) { |
| 5834 var part = order[i]; |
| 5835 if (part.to > start && part.from <= start) break; |
| 5836 } |
| 5837 if (part.to >= end) return inner(builder, text, style, startStyle, endSt
yle, title); |
| 5838 inner(builder, text.slice(0, part.to - start), style, startStyle, null,
title); |
| 5839 startStyle = null; |
| 5840 text = text.slice(part.to - start); |
| 5841 start = part.to; |
| 5842 } |
| 5843 }; |
| 5844 } |
| 5845 |
| 5846 function buildCollapsedSpan(builder, size, marker, ignoreWidget) { |
| 5847 var widget = !ignoreWidget && marker.widgetNode; |
| 5848 if (widget) { |
| 5849 builder.map.push(builder.pos, builder.pos + size, widget); |
| 5850 builder.content.appendChild(widget); |
| 5851 } |
| 5852 builder.pos += size; |
| 5853 } |
| 5854 |
| 5855 // Outputs a number of spans to make up a line, taking highlighting |
| 5856 // and marked text into account. |
| 5857 function insertLineContent(line, builder, styles) { |
| 5858 var spans = line.markedSpans, allText = line.text, at = 0; |
| 5859 if (!spans) { |
| 5860 for (var i = 1; i < styles.length; i+=2) |
| 5861 builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTo
kenStyle(styles[i+1], builder.cm.options)); |
| 5862 return; |
| 5863 } |
| 5864 |
| 5865 var len = allText.length, pos = 0, i = 1, text = "", style; |
| 5866 var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapse
d; |
| 5867 for (;;) { |
| 5868 if (nextChange == pos) { // Update current marker set |
| 5869 spanStyle = spanEndStyle = spanStartStyle = title = ""; |
| 5870 collapsed = null; nextChange = Infinity; |
| 5871 var foundBookmarks = []; |
| 5872 for (var j = 0; j < spans.length; ++j) { |
| 5873 var sp = spans[j], m = sp.marker; |
| 5874 if (sp.from <= pos && (sp.to == null || sp.to > pos)) { |
| 5875 if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanE
ndStyle = ""; } |
| 5876 if (m.className) spanStyle += " " + m.className; |
| 5877 if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startS
tyle; |
| 5878 if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endSt
yle; |
| 5879 if (m.title && !title) title = m.title; |
| 5880 if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.
marker, m) < 0)) |
| 5881 collapsed = sp; |
| 5882 } else if (sp.from > pos && nextChange > sp.from) { |
| 5883 nextChange = sp.from; |
| 5884 } |
| 5885 if (m.type == "bookmark" && sp.from == pos && m.widgetNode) foundBookm
arks.push(m); |
| 5886 } |
| 5887 if (collapsed && (collapsed.from || 0) == pos) { |
| 5888 buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapse
d.to) - pos, |
| 5889 collapsed.marker, collapsed.from == null); |
| 5890 if (collapsed.to == null) return; |
| 5891 } |
| 5892 if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookma
rks.length; ++j) |
| 5893 buildCollapsedSpan(builder, 0, foundBookmarks[j]); |
| 5894 } |
| 5895 if (pos >= len) break; |
| 5896 |
| 5897 var upto = Math.min(len, nextChange); |
| 5898 while (true) { |
| 5899 if (text) { |
| 5900 var end = pos + text.length; |
| 5901 if (!collapsed) { |
| 5902 var tokenText = end > upto ? text.slice(0, upto - pos) : text; |
| 5903 builder.addToken(builder, tokenText, style ? style + spanStyle : spa
nStyle, |
| 5904 spanStartStyle, pos + tokenText.length == nextChang
e ? spanEndStyle : "", title); |
| 5905 } |
| 5906 if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;} |
| 5907 pos = end; |
| 5908 spanStartStyle = ""; |
| 5909 } |
| 5910 text = allText.slice(at, at = styles[i++]); |
| 5911 style = interpretTokenStyle(styles[i++], builder.cm.options); |
| 5912 } |
| 5913 } |
| 5914 } |
| 5915 |
| 5916 // DOCUMENT DATA STRUCTURE |
| 5917 |
| 5918 // By default, updates that start and end at the beginning of a line |
| 5919 // are treated specially, in order to make the association of line |
| 5920 // widgets and marker elements with the text behave more intuitive. |
| 5921 function isWholeLineUpdate(doc, change) { |
| 5922 return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" && |
| 5923 (!doc.cm || doc.cm.options.wholeLineUpdateBefore); |
| 5924 } |
| 5925 |
| 5926 // Perform a change on the document data structure. |
| 5927 function updateDoc(doc, change, markedSpans, estimateHeight) { |
| 5928 function spansFor(n) {return markedSpans ? markedSpans[n] : null;} |
| 5929 function update(line, text, spans) { |
| 5930 updateLine(line, text, spans, estimateHeight); |
| 5931 signalLater(line, "change", line, change); |
| 5932 } |
| 5933 |
| 5934 var from = change.from, to = change.to, text = change.text; |
| 5935 var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line); |
| 5936 var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to
.line - from.line; |
| 5937 |
| 5938 // Adjust the line structure |
| 5939 if (isWholeLineUpdate(doc, change)) { |
| 5940 // This is a whole-line replace. Treated specially to make |
| 5941 // sure line objects move the way they are supposed to. |
| 5942 for (var i = 0, added = []; i < text.length - 1; ++i) |
| 5943 added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| 5944 update(lastLine, lastLine.text, lastSpans); |
| 5945 if (nlines) doc.remove(from.line, nlines); |
| 5946 if (added.length) doc.insert(from.line, added); |
| 5947 } else if (firstLine == lastLine) { |
| 5948 if (text.length == 1) { |
| 5949 update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLin
e.text.slice(to.ch), lastSpans); |
| 5950 } else { |
| 5951 for (var added = [], i = 1; i < text.length - 1; ++i) |
| 5952 added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| 5953 added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, e
stimateHeight)); |
| 5954 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0
)); |
| 5955 doc.insert(from.line + 1, added); |
| 5956 } |
| 5957 } else if (text.length == 1) { |
| 5958 update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.te
xt.slice(to.ch), spansFor(0)); |
| 5959 doc.remove(from.line + 1, nlines); |
| 5960 } else { |
| 5961 update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0))
; |
| 5962 update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans); |
| 5963 for (var i = 1, added = []; i < text.length - 1; ++i) |
| 5964 added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| 5965 if (nlines > 1) doc.remove(from.line + 1, nlines - 1); |
| 5966 doc.insert(from.line + 1, added); |
| 5967 } |
| 5968 |
| 5969 signalLater(doc, "change", doc, change); |
| 5970 } |
| 5971 |
| 5972 // The document is represented as a BTree consisting of leaves, with |
| 5973 // chunk of lines in them, and branches, with up to ten leaves or |
| 5974 // other branch nodes below them. The top node is always a branch |
| 5975 // node, and is the document object itself (meaning it has |
| 5976 // additional methods and properties). |
| 5977 // |
| 5978 // All nodes have parent links. The tree is used both to go from |
| 5979 // line numbers to line objects, and to go from objects to numbers. |
| 5980 // It also indexes by height, and is used to convert between height |
| 5981 // and line object, and to find the total height of the document. |
| 5982 // |
| 5983 // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html |
| 5984 |
| 5985 function LeafChunk(lines) { |
| 5986 this.lines = lines; |
| 5987 this.parent = null; |
| 5988 for (var i = 0, height = 0; i < lines.length; ++i) { |
| 5989 lines[i].parent = this; |
| 5990 height += lines[i].height; |
| 5991 } |
| 5992 this.height = height; |
| 5993 } |
| 5994 |
| 5995 LeafChunk.prototype = { |
| 5996 chunkSize: function() { return this.lines.length; }, |
| 5997 // Remove the n lines at offset 'at'. |
| 5998 removeInner: function(at, n) { |
| 5999 for (var i = at, e = at + n; i < e; ++i) { |
| 6000 var line = this.lines[i]; |
| 6001 this.height -= line.height; |
| 6002 cleanUpLine(line); |
| 6003 signalLater(line, "delete"); |
| 6004 } |
| 6005 this.lines.splice(at, n); |
| 6006 }, |
| 6007 // Helper used to collapse a small branch into a single leaf. |
| 6008 collapse: function(lines) { |
| 6009 lines.push.apply(lines, this.lines); |
| 6010 }, |
| 6011 // Insert the given array of lines at offset 'at', count them as |
| 6012 // having the given height. |
| 6013 insertInner: function(at, lines, height) { |
| 6014 this.height += height; |
| 6015 this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice
(at)); |
| 6016 for (var i = 0; i < lines.length; ++i) lines[i].parent = this; |
| 6017 }, |
| 6018 // Used to iterate over a part of the tree. |
| 6019 iterN: function(at, n, op) { |
| 6020 for (var e = at + n; at < e; ++at) |
| 6021 if (op(this.lines[at])) return true; |
| 6022 } |
| 6023 }; |
| 6024 |
| 6025 function BranchChunk(children) { |
| 6026 this.children = children; |
| 6027 var size = 0, height = 0; |
| 6028 for (var i = 0; i < children.length; ++i) { |
| 6029 var ch = children[i]; |
| 6030 size += ch.chunkSize(); height += ch.height; |
| 6031 ch.parent = this; |
| 6032 } |
| 6033 this.size = size; |
| 6034 this.height = height; |
| 6035 this.parent = null; |
| 6036 } |
| 6037 |
| 6038 BranchChunk.prototype = { |
| 6039 chunkSize: function() { return this.size; }, |
| 6040 removeInner: function(at, n) { |
| 6041 this.size -= n; |
| 6042 for (var i = 0; i < this.children.length; ++i) { |
| 6043 var child = this.children[i], sz = child.chunkSize(); |
| 6044 if (at < sz) { |
| 6045 var rm = Math.min(n, sz - at), oldHeight = child.height; |
| 6046 child.removeInner(at, rm); |
| 6047 this.height -= oldHeight - child.height; |
| 6048 if (sz == rm) { this.children.splice(i--, 1); child.parent = null; } |
| 6049 if ((n -= rm) == 0) break; |
| 6050 at = 0; |
| 6051 } else at -= sz; |
| 6052 } |
| 6053 // If the result is smaller than 25 lines, ensure that it is a |
| 6054 // single leaf node. |
| 6055 if (this.size - n < 25 && |
| 6056 (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))
) { |
| 6057 var lines = []; |
| 6058 this.collapse(lines); |
| 6059 this.children = [new LeafChunk(lines)]; |
| 6060 this.children[0].parent = this; |
| 6061 } |
| 6062 }, |
| 6063 collapse: function(lines) { |
| 6064 for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(l
ines); |
| 6065 }, |
| 6066 insertInner: function(at, lines, height) { |
| 6067 this.size += lines.length; |
| 6068 this.height += height; |
| 6069 for (var i = 0; i < this.children.length; ++i) { |
| 6070 var child = this.children[i], sz = child.chunkSize(); |
| 6071 if (at <= sz) { |
| 6072 child.insertInner(at, lines, height); |
| 6073 if (child.lines && child.lines.length > 50) { |
| 6074 while (child.lines.length > 50) { |
| 6075 var spilled = child.lines.splice(child.lines.length - 25, 25); |
| 6076 var newleaf = new LeafChunk(spilled); |
| 6077 child.height -= newleaf.height; |
| 6078 this.children.splice(i + 1, 0, newleaf); |
| 6079 newleaf.parent = this; |
| 6080 } |
| 6081 this.maybeSpill(); |
| 6082 } |
| 6083 break; |
| 6084 } |
| 6085 at -= sz; |
| 6086 } |
| 6087 }, |
| 6088 // When a node has grown, check whether it should be split. |
| 6089 maybeSpill: function() { |
| 6090 if (this.children.length <= 10) return; |
| 6091 var me = this; |
| 6092 do { |
| 6093 var spilled = me.children.splice(me.children.length - 5, 5); |
| 6094 var sibling = new BranchChunk(spilled); |
| 6095 if (!me.parent) { // Become the parent node |
| 6096 var copy = new BranchChunk(me.children); |
| 6097 copy.parent = me; |
| 6098 me.children = [copy, sibling]; |
| 6099 me = copy; |
| 6100 } else { |
| 6101 me.size -= sibling.size; |
| 6102 me.height -= sibling.height; |
| 6103 var myIndex = indexOf(me.parent.children, me); |
| 6104 me.parent.children.splice(myIndex + 1, 0, sibling); |
| 6105 } |
| 6106 sibling.parent = me.parent; |
| 6107 } while (me.children.length > 10); |
| 6108 me.parent.maybeSpill(); |
| 6109 }, |
| 6110 iterN: function(at, n, op) { |
| 6111 for (var i = 0; i < this.children.length; ++i) { |
| 6112 var child = this.children[i], sz = child.chunkSize(); |
| 6113 if (at < sz) { |
| 6114 var used = Math.min(n, sz - at); |
| 6115 if (child.iterN(at, used, op)) return true; |
| 6116 if ((n -= used) == 0) break; |
| 6117 at = 0; |
| 6118 } else at -= sz; |
| 6119 } |
| 6120 } |
| 6121 }; |
| 6122 |
| 6123 var nextDocId = 0; |
| 6124 var Doc = CodeMirror.Doc = function(text, mode, firstLine) { |
| 6125 if (!(this instanceof Doc)) return new Doc(text, mode, firstLine); |
| 6126 if (firstLine == null) firstLine = 0; |
| 6127 |
| 6128 BranchChunk.call(this, [new LeafChunk([new Line("", null)])]); |
| 6129 this.first = firstLine; |
| 6130 this.scrollTop = this.scrollLeft = 0; |
| 6131 this.cantEdit = false; |
| 6132 this.cleanGeneration = 1; |
| 6133 this.frontier = firstLine; |
| 6134 var start = Pos(firstLine, 0); |
| 6135 this.sel = simpleSelection(start); |
| 6136 this.history = new History(null); |
| 6137 this.id = ++nextDocId; |
| 6138 this.modeOption = mode; |
| 6139 |
| 6140 if (typeof text == "string") text = splitLines(text); |
| 6141 updateDoc(this, {from: start, to: start, text: text}); |
| 6142 setSelection(this, simpleSelection(start), sel_dontScroll); |
| 6143 }; |
| 6144 |
| 6145 Doc.prototype = createObj(BranchChunk.prototype, { |
| 6146 constructor: Doc, |
| 6147 // Iterate over the document. Supports two forms -- with only one |
| 6148 // argument, it calls that for each line in the document. With |
| 6149 // three, it iterates over the range given by the first two (with |
| 6150 // the second being non-inclusive). |
| 6151 iter: function(from, to, op) { |
| 6152 if (op) this.iterN(from - this.first, to - from, op); |
| 6153 else this.iterN(this.first, this.first + this.size, from); |
| 6154 }, |
| 6155 |
| 6156 // Non-public interface for adding and removing lines. |
| 6157 insert: function(at, lines) { |
| 6158 var height = 0; |
| 6159 for (var i = 0; i < lines.length; ++i) height += lines[i].height; |
| 6160 this.insertInner(at - this.first, lines, height); |
| 6161 }, |
| 6162 remove: function(at, n) { this.removeInner(at - this.first, n); }, |
| 6163 |
| 6164 // From here, the methods are part of the public interface. Most |
| 6165 // are also available from CodeMirror (editor) instances. |
| 6166 |
| 6167 getValue: function(lineSep) { |
| 6168 var lines = getLines(this, this.first, this.first + this.size); |
| 6169 if (lineSep === false) return lines; |
| 6170 return lines.join(lineSep || "\n"); |
| 6171 }, |
| 6172 setValue: docMethodOp(function(code) { |
| 6173 var top = Pos(this.first, 0), last = this.first + this.size - 1; |
| 6174 makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length
), |
| 6175 text: splitLines(code), origin: "setValue"}, true); |
| 6176 setSelection(this, simpleSelection(top)); |
| 6177 }), |
| 6178 replaceRange: function(code, from, to, origin) { |
| 6179 from = clipPos(this, from); |
| 6180 to = to ? clipPos(this, to) : from; |
| 6181 replaceRange(this, code, from, to, origin); |
| 6182 }, |
| 6183 getRange: function(from, to, lineSep) { |
| 6184 var lines = getBetween(this, clipPos(this, from), clipPos(this, to)); |
| 6185 if (lineSep === false) return lines; |
| 6186 return lines.join(lineSep || "\n"); |
| 6187 }, |
| 6188 |
| 6189 getLine: function(line) {var l = this.getLineHandle(line); return l && l.tex
t;}, |
| 6190 |
| 6191 getLineHandle: function(line) {if (isLine(this, line)) return getLine(this,
line);}, |
| 6192 getLineNumber: function(line) {return lineNo(line);}, |
| 6193 |
| 6194 getLineHandleVisualStart: function(line) { |
| 6195 if (typeof line == "number") line = getLine(this, line); |
| 6196 return visualLine(line); |
| 6197 }, |
| 6198 |
| 6199 lineCount: function() {return this.size;}, |
| 6200 firstLine: function() {return this.first;}, |
| 6201 lastLine: function() {return this.first + this.size - 1;}, |
| 6202 |
| 6203 clipPos: function(pos) {return clipPos(this, pos);}, |
| 6204 |
| 6205 getCursor: function(start) { |
| 6206 var range = this.sel.primary(), pos; |
| 6207 if (start == null || start == "head") pos = range.head; |
| 6208 else if (start == "anchor") pos = range.anchor; |
| 6209 else if (start == "end" || start == "to" || start === false) pos = range.t
o(); |
| 6210 else pos = range.from(); |
| 6211 return pos; |
| 6212 }, |
| 6213 listSelections: function() { return this.sel.ranges; }, |
| 6214 somethingSelected: function() {return this.sel.somethingSelected();}, |
| 6215 |
| 6216 setCursor: docMethodOp(function(line, ch, options) { |
| 6217 setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line,
ch || 0) : line), null, options); |
| 6218 }), |
| 6219 setSelection: docMethodOp(function(anchor, head, options) { |
| 6220 setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anch
or), options); |
| 6221 }), |
| 6222 extendSelection: docMethodOp(function(head, other, options) { |
| 6223 extendSelection(this, clipPos(this, head), other && clipPos(this, other),
options); |
| 6224 }), |
| 6225 extendSelections: docMethodOp(function(heads, options) { |
| 6226 extendSelections(this, clipPosArray(this, heads, options)); |
| 6227 }), |
| 6228 extendSelectionsBy: docMethodOp(function(f, options) { |
| 6229 extendSelections(this, map(this.sel.ranges, f), options); |
| 6230 }), |
| 6231 setSelections: docMethodOp(function(ranges, primary, options) { |
| 6232 if (!ranges.length) return; |
| 6233 for (var i = 0, out = []; i < ranges.length; i++) |
| 6234 out[i] = new Range(clipPos(this, ranges[i].anchor), |
| 6235 clipPos(this, ranges[i].head)); |
| 6236 if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIn
dex); |
| 6237 setSelection(this, normalizeSelection(out, primary), options); |
| 6238 }), |
| 6239 addSelection: docMethodOp(function(anchor, head, options) { |
| 6240 var ranges = this.sel.ranges.slice(0); |
| 6241 ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor)
)); |
| 6242 setSelection(this, normalizeSelection(ranges, ranges.length - 1), options)
; |
| 6243 }), |
| 6244 |
| 6245 getSelection: function(lineSep) { |
| 6246 var ranges = this.sel.ranges, lines; |
| 6247 for (var i = 0; i < ranges.length; i++) { |
| 6248 var sel = getBetween(this, ranges[i].from(), ranges[i].to()); |
| 6249 lines = lines ? lines.concat(sel) : sel; |
| 6250 } |
| 6251 if (lineSep === false) return lines; |
| 6252 else return lines.join(lineSep || "\n"); |
| 6253 }, |
| 6254 getSelections: function(lineSep) { |
| 6255 var parts = [], ranges = this.sel.ranges; |
| 6256 for (var i = 0; i < ranges.length; i++) { |
| 6257 var sel = getBetween(this, ranges[i].from(), ranges[i].to()); |
| 6258 if (lineSep !== false) sel = sel.join(lineSep || "\n"); |
| 6259 parts[i] = sel; |
| 6260 } |
| 6261 return parts; |
| 6262 }, |
| 6263 replaceSelection: function(code, collapse, origin) { |
| 6264 var dup = []; |
| 6265 for (var i = 0; i < this.sel.ranges.length; i++) |
| 6266 dup[i] = code; |
| 6267 this.replaceSelections(dup, collapse, origin || "+input"); |
| 6268 }, |
| 6269 replaceSelections: docMethodOp(function(code, collapse, origin) { |
| 6270 var changes = [], sel = this.sel; |
| 6271 for (var i = 0; i < sel.ranges.length; i++) { |
| 6272 var range = sel.ranges[i]; |
| 6273 changes[i] = {from: range.from(), to: range.to(), text: splitLines(code[
i]), origin: origin}; |
| 6274 } |
| 6275 var newSel = collapse && collapse != "end" && computeReplacedSel(this, cha
nges, collapse); |
| 6276 for (var i = changes.length - 1; i >= 0; i--) |
| 6277 makeChange(this, changes[i]); |
| 6278 if (newSel) setSelectionReplaceHistory(this, newSel); |
| 6279 else if (this.cm) ensureCursorVisible(this.cm); |
| 6280 }), |
| 6281 undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}), |
| 6282 redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}), |
| 6283 undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", t
rue);}), |
| 6284 redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", t
rue);}), |
| 6285 |
| 6286 setExtending: function(val) {this.extend = val;}, |
| 6287 getExtending: function() {return this.extend;}, |
| 6288 |
| 6289 historySize: function() { |
| 6290 var hist = this.history, done = 0, undone = 0; |
| 6291 for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++don
e; |
| 6292 for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) +
+undone; |
| 6293 return {undo: done, redo: undone}; |
| 6294 }, |
| 6295 clearHistory: function() {this.history = new History(this.history.maxGenerat
ion);}, |
| 6296 |
| 6297 markClean: function() { |
| 6298 this.cleanGeneration = this.changeGeneration(true); |
| 6299 }, |
| 6300 changeGeneration: function(forceSplit) { |
| 6301 if (forceSplit) |
| 6302 this.history.lastOp = this.history.lastOrigin = null; |
| 6303 return this.history.generation; |
| 6304 }, |
| 6305 isClean: function (gen) { |
| 6306 return this.history.generation == (gen || this.cleanGeneration); |
| 6307 }, |
| 6308 |
| 6309 getHistory: function() { |
| 6310 return {done: copyHistoryArray(this.history.done), |
| 6311 undone: copyHistoryArray(this.history.undone)}; |
| 6312 }, |
| 6313 setHistory: function(histData) { |
| 6314 var hist = this.history = new History(this.history.maxGeneration); |
| 6315 hist.done = copyHistoryArray(histData.done.slice(0), null, true); |
| 6316 hist.undone = copyHistoryArray(histData.undone.slice(0), null, true); |
| 6317 }, |
| 6318 |
| 6319 markText: function(from, to, options) { |
| 6320 return markText(this, clipPos(this, from), clipPos(this, to), options, "ra
nge"); |
| 6321 }, |
| 6322 setBookmark: function(pos, options) { |
| 6323 var realOpts = {replacedWith: options && (options.nodeType == null ? optio
ns.widget : options), |
| 6324 insertLeft: options && options.insertLeft, |
| 6325 clearWhenEmpty: false, shared: options && options.shared}; |
| 6326 pos = clipPos(this, pos); |
| 6327 return markText(this, pos, pos, realOpts, "bookmark"); |
| 6328 }, |
| 6329 findMarksAt: function(pos) { |
| 6330 pos = clipPos(this, pos); |
| 6331 var markers = [], spans = getLine(this, pos.line).markedSpans; |
| 6332 if (spans) for (var i = 0; i < spans.length; ++i) { |
| 6333 var span = spans[i]; |
| 6334 if ((span.from == null || span.from <= pos.ch) && |
| 6335 (span.to == null || span.to >= pos.ch)) |
| 6336 markers.push(span.marker.parent || span.marker); |
| 6337 } |
| 6338 return markers; |
| 6339 }, |
| 6340 findMarks: function(from, to, filter) { |
| 6341 from = clipPos(this, from); to = clipPos(this, to); |
| 6342 var found = [], lineNo = from.line; |
| 6343 this.iter(from.line, to.line + 1, function(line) { |
| 6344 var spans = line.markedSpans; |
| 6345 if (spans) for (var i = 0; i < spans.length; i++) { |
| 6346 var span = spans[i]; |
| 6347 if (!(lineNo == from.line && from.ch > span.to || |
| 6348 span.from == null && lineNo != from.line|| |
| 6349 lineNo == to.line && span.from > to.ch) && |
| 6350 (!filter || filter(span.marker))) |
| 6351 found.push(span.marker.parent || span.marker); |
| 6352 } |
| 6353 ++lineNo; |
| 6354 }); |
| 6355 return found; |
| 6356 }, |
| 6357 getAllMarks: function() { |
| 6358 var markers = []; |
| 6359 this.iter(function(line) { |
| 6360 var sps = line.markedSpans; |
| 6361 if (sps) for (var i = 0; i < sps.length; ++i) |
| 6362 if (sps[i].from != null) markers.push(sps[i].marker); |
| 6363 }); |
| 6364 return markers; |
| 6365 }, |
| 6366 |
| 6367 posFromIndex: function(off) { |
| 6368 var ch, lineNo = this.first; |
| 6369 this.iter(function(line) { |
| 6370 var sz = line.text.length + 1; |
| 6371 if (sz > off) { ch = off; return true; } |
| 6372 off -= sz; |
| 6373 ++lineNo; |
| 6374 }); |
| 6375 return clipPos(this, Pos(lineNo, ch)); |
| 6376 }, |
| 6377 indexFromPos: function (coords) { |
| 6378 coords = clipPos(this, coords); |
| 6379 var index = coords.ch; |
| 6380 if (coords.line < this.first || coords.ch < 0) return 0; |
| 6381 this.iter(this.first, coords.line, function (line) { |
| 6382 index += line.text.length + 1; |
| 6383 }); |
| 6384 return index; |
| 6385 }, |
| 6386 |
| 6387 copy: function(copyHistory) { |
| 6388 var doc = new Doc(getLines(this, this.first, this.first + this.size), this
.modeOption, this.first); |
| 6389 doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft; |
| 6390 doc.sel = this.sel; |
| 6391 doc.extend = false; |
| 6392 if (copyHistory) { |
| 6393 doc.history.undoDepth = this.history.undoDepth; |
| 6394 doc.setHistory(this.getHistory()); |
| 6395 } |
| 6396 return doc; |
| 6397 }, |
| 6398 |
| 6399 linkedDoc: function(options) { |
| 6400 if (!options) options = {}; |
| 6401 var from = this.first, to = this.first + this.size; |
| 6402 if (options.from != null && options.from > from) from = options.from; |
| 6403 if (options.to != null && options.to < to) to = options.to; |
| 6404 var copy = new Doc(getLines(this, from, to), options.mode || this.modeOpti
on, from); |
| 6405 if (options.sharedHist) copy.history = this.history; |
| 6406 (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.s
haredHist}); |
| 6407 copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}
]; |
| 6408 copySharedMarkers(copy, findSharedMarkers(this)); |
| 6409 return copy; |
| 6410 }, |
| 6411 unlinkDoc: function(other) { |
| 6412 if (other instanceof CodeMirror) other = other.doc; |
| 6413 if (this.linked) for (var i = 0; i < this.linked.length; ++i) { |
| 6414 var link = this.linked[i]; |
| 6415 if (link.doc != other) continue; |
| 6416 this.linked.splice(i, 1); |
| 6417 other.unlinkDoc(this); |
| 6418 detachSharedMarkers(findSharedMarkers(this)); |
| 6419 break; |
| 6420 } |
| 6421 // If the histories were shared, split them again |
| 6422 if (other.history == this.history) { |
| 6423 var splitIds = [other.id]; |
| 6424 linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true); |
| 6425 other.history = new History(null); |
| 6426 other.history.done = copyHistoryArray(this.history.done, splitIds); |
| 6427 other.history.undone = copyHistoryArray(this.history.undone, splitIds); |
| 6428 } |
| 6429 }, |
| 6430 iterLinkedDocs: function(f) {linkedDocs(this, f);}, |
| 6431 |
| 6432 getMode: function() {return this.mode;}, |
| 6433 getEditor: function() {return this.cm;} |
| 6434 }); |
| 6435 |
| 6436 // Public alias. |
| 6437 Doc.prototype.eachLine = Doc.prototype.iter; |
| 6438 |
| 6439 // Set up methods on CodeMirror's prototype to redirect to the editor's docume
nt. |
| 6440 var dontDelegate = "iter insert remove copy getEditor".split(" "); |
| 6441 for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && inde
xOf(dontDelegate, prop) < 0) |
| 6442 CodeMirror.prototype[prop] = (function(method) { |
| 6443 return function() {return method.apply(this.doc, arguments);}; |
| 6444 })(Doc.prototype[prop]); |
| 6445 |
| 6446 eventMixin(Doc); |
| 6447 |
| 6448 // Call f for all linked documents. |
| 6449 function linkedDocs(doc, f, sharedHistOnly) { |
| 6450 function propagate(doc, skip, sharedHist) { |
| 6451 if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) { |
| 6452 var rel = doc.linked[i]; |
| 6453 if (rel.doc == skip) continue; |
| 6454 var shared = sharedHist && rel.sharedHist; |
| 6455 if (sharedHistOnly && !shared) continue; |
| 6456 f(rel.doc, shared); |
| 6457 propagate(rel.doc, doc, shared); |
| 6458 } |
| 6459 } |
| 6460 propagate(doc, null, true); |
| 6461 } |
| 6462 |
| 6463 // Attach a document to an editor. |
| 6464 function attachDoc(cm, doc) { |
| 6465 if (doc.cm) throw new Error("This document is already in use."); |
| 6466 cm.doc = doc; |
| 6467 doc.cm = cm; |
| 6468 estimateLineHeights(cm); |
| 6469 loadMode(cm); |
| 6470 if (!cm.options.lineWrapping) findMaxLine(cm); |
| 6471 cm.options.mode = doc.modeOption; |
| 6472 regChange(cm); |
| 6473 } |
| 6474 |
| 6475 // LINE UTILITIES |
| 6476 |
| 6477 // Find the line object corresponding to the given line number. |
| 6478 function getLine(doc, n) { |
| 6479 n -= doc.first; |
| 6480 if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.f
irst) + " in the document."); |
| 6481 for (var chunk = doc; !chunk.lines;) { |
| 6482 for (var i = 0;; ++i) { |
| 6483 var child = chunk.children[i], sz = child.chunkSize(); |
| 6484 if (n < sz) { chunk = child; break; } |
| 6485 n -= sz; |
| 6486 } |
| 6487 } |
| 6488 return chunk.lines[n]; |
| 6489 } |
| 6490 |
| 6491 // Get the part of a document between two positions, as an array of |
| 6492 // strings. |
| 6493 function getBetween(doc, start, end) { |
| 6494 var out = [], n = start.line; |
| 6495 doc.iter(start.line, end.line + 1, function(line) { |
| 6496 var text = line.text; |
| 6497 if (n == end.line) text = text.slice(0, end.ch); |
| 6498 if (n == start.line) text = text.slice(start.ch); |
| 6499 out.push(text); |
| 6500 ++n; |
| 6501 }); |
| 6502 return out; |
| 6503 } |
| 6504 // Get the lines between from and to, as array of strings. |
| 6505 function getLines(doc, from, to) { |
| 6506 var out = []; |
| 6507 doc.iter(from, to, function(line) { out.push(line.text); }); |
| 6508 return out; |
| 6509 } |
| 6510 |
| 6511 // Update the height of a line, propagating the height change |
| 6512 // upwards to parent nodes. |
| 6513 function updateLineHeight(line, height) { |
| 6514 var diff = height - line.height; |
| 6515 if (diff) for (var n = line; n; n = n.parent) n.height += diff; |
| 6516 } |
| 6517 |
| 6518 // Given a line object, find its line number by walking up through |
| 6519 // its parent links. |
| 6520 function lineNo(line) { |
| 6521 if (line.parent == null) return null; |
| 6522 var cur = line.parent, no = indexOf(cur.lines, line); |
| 6523 for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) { |
| 6524 for (var i = 0;; ++i) { |
| 6525 if (chunk.children[i] == cur) break; |
| 6526 no += chunk.children[i].chunkSize(); |
| 6527 } |
| 6528 } |
| 6529 return no + cur.first; |
| 6530 } |
| 6531 |
| 6532 // Find the line at the given vertical position, using the height |
| 6533 // information in the document tree. |
| 6534 function lineAtHeight(chunk, h) { |
| 6535 var n = chunk.first; |
| 6536 outer: do { |
| 6537 for (var i = 0; i < chunk.children.length; ++i) { |
| 6538 var child = chunk.children[i], ch = child.height; |
| 6539 if (h < ch) { chunk = child; continue outer; } |
| 6540 h -= ch; |
| 6541 n += child.chunkSize(); |
| 6542 } |
| 6543 return n; |
| 6544 } while (!chunk.lines); |
| 6545 for (var i = 0; i < chunk.lines.length; ++i) { |
| 6546 var line = chunk.lines[i], lh = line.height; |
| 6547 if (h < lh) break; |
| 6548 h -= lh; |
| 6549 } |
| 6550 return n + i; |
| 6551 } |
| 6552 |
| 6553 |
| 6554 // Find the height above the given line. |
| 6555 function heightAtLine(lineObj) { |
| 6556 lineObj = visualLine(lineObj); |
| 6557 |
| 6558 var h = 0, chunk = lineObj.parent; |
| 6559 for (var i = 0; i < chunk.lines.length; ++i) { |
| 6560 var line = chunk.lines[i]; |
| 6561 if (line == lineObj) break; |
| 6562 else h += line.height; |
| 6563 } |
| 6564 for (var p = chunk.parent; p; chunk = p, p = chunk.parent) { |
| 6565 for (var i = 0; i < p.children.length; ++i) { |
| 6566 var cur = p.children[i]; |
| 6567 if (cur == chunk) break; |
| 6568 else h += cur.height; |
| 6569 } |
| 6570 } |
| 6571 return h; |
| 6572 } |
| 6573 |
| 6574 // Get the bidi ordering for the given line (and cache it). Returns |
| 6575 // false for lines that are fully left-to-right, and an array of |
| 6576 // BidiSpan objects otherwise. |
| 6577 function getOrder(line) { |
| 6578 var order = line.order; |
| 6579 if (order == null) order = line.order = bidiOrdering(line.text); |
| 6580 return order; |
| 6581 } |
| 6582 |
| 6583 // HISTORY |
| 6584 |
| 6585 function History(startGen) { |
| 6586 // Arrays of change events and selections. Doing something adds an |
| 6587 // event to done and clears undo. Undoing moves events from done |
| 6588 // to undone, redoing moves them in the other direction. |
| 6589 this.done = []; this.undone = []; |
| 6590 this.undoDepth = Infinity; |
| 6591 // Used to track when changes can be merged into a single undo |
| 6592 // event |
| 6593 this.lastModTime = this.lastSelTime = 0; |
| 6594 this.lastOp = null; |
| 6595 this.lastOrigin = this.lastSelOrigin = null; |
| 6596 // Used by the isClean() method |
| 6597 this.generation = this.maxGeneration = startGen || 1; |
| 6598 } |
| 6599 |
| 6600 // Create a history change event from an updateDoc-style change |
| 6601 // object. |
| 6602 function historyChangeFromChange(doc, change) { |
| 6603 var histChange = {from: copyPos(change.from), to: changeEnd(change), text: g
etBetween(doc, change.from, change.to)}; |
| 6604 attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); |
| 6605 linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from
.line, change.to.line + 1);}, true); |
| 6606 return histChange; |
| 6607 } |
| 6608 |
| 6609 // Pop all selection events off the end of a history array. Stop at |
| 6610 // a change event. |
| 6611 function clearSelectionEvents(array) { |
| 6612 while (array.length) { |
| 6613 var last = lst(array); |
| 6614 if (last.ranges) array.pop(); |
| 6615 else break; |
| 6616 } |
| 6617 } |
| 6618 |
| 6619 // Find the top change event in the history. Pop off selection |
| 6620 // events that are in the way. |
| 6621 function lastChangeEvent(hist, force) { |
| 6622 if (force) { |
| 6623 clearSelectionEvents(hist.done); |
| 6624 return lst(hist.done); |
| 6625 } else if (hist.done.length && !lst(hist.done).ranges) { |
| 6626 return lst(hist.done); |
| 6627 } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges)
{ |
| 6628 hist.done.pop(); |
| 6629 return lst(hist.done); |
| 6630 } |
| 6631 } |
| 6632 |
| 6633 // Register a change in the history. Merges changes that are within |
| 6634 // a single operation, ore are close together with an origin that |
| 6635 // allows merging (starting with "+") into a single event. |
| 6636 function addChangeToHistory(doc, change, selAfter, opId) { |
| 6637 var hist = doc.history; |
| 6638 hist.undone.length = 0; |
| 6639 var time = +new Date, cur; |
| 6640 |
| 6641 if ((hist.lastOp == opId || |
| 6642 hist.lastOrigin == change.origin && change.origin && |
| 6643 ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time -
doc.cm.options.historyEventDelay) || |
| 6644 change.origin.charAt(0) == "*")) && |
| 6645 (cur = lastChangeEvent(hist, hist.lastOp == opId))) { |
| 6646 // Merge this change into the last event |
| 6647 var last = lst(cur.changes); |
| 6648 if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) { |
| 6649 // Optimized case for simple insertion -- don't want to add |
| 6650 // new changesets for every character typed |
| 6651 last.to = changeEnd(change); |
| 6652 } else { |
| 6653 // Add new sub-event |
| 6654 cur.changes.push(historyChangeFromChange(doc, change)); |
| 6655 } |
| 6656 } else { |
| 6657 // Can not be merged, start a new event. |
| 6658 var before = lst(hist.done); |
| 6659 if (!before || !before.ranges) |
| 6660 pushSelectionToHistory(doc.sel, hist.done); |
| 6661 cur = {changes: [historyChangeFromChange(doc, change)], |
| 6662 generation: hist.generation}; |
| 6663 hist.done.push(cur); |
| 6664 while (hist.done.length > hist.undoDepth) { |
| 6665 hist.done.shift(); |
| 6666 if (!hist.done[0].ranges) hist.done.shift(); |
| 6667 } |
| 6668 } |
| 6669 hist.done.push(selAfter); |
| 6670 hist.generation = ++hist.maxGeneration; |
| 6671 hist.lastModTime = hist.lastSelTime = time; |
| 6672 hist.lastOp = opId; |
| 6673 hist.lastOrigin = hist.lastSelOrigin = change.origin; |
| 6674 |
| 6675 if (!last) signal(doc, "historyAdded"); |
| 6676 } |
| 6677 |
| 6678 function selectionEventCanBeMerged(doc, origin, prev, sel) { |
| 6679 var ch = origin.charAt(0); |
| 6680 return ch == "*" || |
| 6681 ch == "+" && |
| 6682 prev.ranges.length == sel.ranges.length && |
| 6683 prev.somethingSelected() == sel.somethingSelected() && |
| 6684 new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEven
tDelay : 500); |
| 6685 } |
| 6686 |
| 6687 // Called whenever the selection changes, sets the new selection as |
| 6688 // the pending selection in the history, and pushes the old pending |
| 6689 // selection into the 'done' array when it was significantly |
| 6690 // different (in number of selected ranges, emptiness, or time). |
| 6691 function addSelectionToHistory(doc, sel, opId, options) { |
| 6692 var hist = doc.history, origin = options && options.origin; |
| 6693 |
| 6694 // A new event is started when the previous origin does not match |
| 6695 // the current, or the origins don't allow matching. Origins |
| 6696 // starting with * are always merged, those starting with + are |
| 6697 // merged when similar and close together in time. |
| 6698 if (opId == hist.lastOp || |
| 6699 (origin && hist.lastSelOrigin == origin && |
| 6700 (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin || |
| 6701 selectionEventCanBeMerged(doc, origin, lst(hist.done), sel)))) |
| 6702 hist.done[hist.done.length - 1] = sel; |
| 6703 else |
| 6704 pushSelectionToHistory(sel, hist.done); |
| 6705 |
| 6706 hist.lastSelTime = +new Date; |
| 6707 hist.lastSelOrigin = origin; |
| 6708 hist.lastOp = opId; |
| 6709 if (options && options.clearRedo !== false) |
| 6710 clearSelectionEvents(hist.undone); |
| 6711 } |
| 6712 |
| 6713 function pushSelectionToHistory(sel, dest) { |
| 6714 var top = lst(dest); |
| 6715 if (!(top && top.ranges && top.equals(sel))) |
| 6716 dest.push(sel); |
| 6717 } |
| 6718 |
| 6719 // Used to store marked span information in the history. |
| 6720 function attachLocalSpans(doc, change, from, to) { |
| 6721 var existing = change["spans_" + doc.id], n = 0; |
| 6722 doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), func
tion(line) { |
| 6723 if (line.markedSpans) |
| 6724 (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.mark
edSpans; |
| 6725 ++n; |
| 6726 }); |
| 6727 } |
| 6728 |
| 6729 // When un/re-doing restores text containing marked spans, those |
| 6730 // that have been explicitly cleared should not be restored. |
| 6731 function removeClearedSpans(spans) { |
| 6732 if (!spans) return null; |
| 6733 for (var i = 0, out; i < spans.length; ++i) { |
| 6734 if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i)
; } |
| 6735 else if (out) out.push(spans[i]); |
| 6736 } |
| 6737 return !out ? spans : out.length ? out : null; |
| 6738 } |
| 6739 |
| 6740 // Retrieve and filter the old marked spans stored in a change event. |
| 6741 function getOldSpans(doc, change) { |
| 6742 var found = change["spans_" + doc.id]; |
| 6743 if (!found) return null; |
| 6744 for (var i = 0, nw = []; i < change.text.length; ++i) |
| 6745 nw.push(removeClearedSpans(found[i])); |
| 6746 return nw; |
| 6747 } |
| 6748 |
| 6749 // Used both to provide a JSON-safe object in .getHistory, and, when |
| 6750 // detaching a document, to split the history in two |
| 6751 function copyHistoryArray(events, newGroup, instantiateSel) { |
| 6752 for (var i = 0, copy = []; i < events.length; ++i) { |
| 6753 var event = events[i]; |
| 6754 if (event.ranges) { |
| 6755 copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : ev
ent); |
| 6756 continue; |
| 6757 } |
| 6758 var changes = event.changes, newChanges = []; |
| 6759 copy.push({changes: newChanges}); |
| 6760 for (var j = 0; j < changes.length; ++j) { |
| 6761 var change = changes[j], m; |
| 6762 newChanges.push({from: change.from, to: change.to, text: change.text}); |
| 6763 if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$
/)) { |
| 6764 if (indexOf(newGroup, Number(m[1])) > -1) { |
| 6765 lst(newChanges)[prop] = change[prop]; |
| 6766 delete change[prop]; |
| 6767 } |
| 6768 } |
| 6769 } |
| 6770 } |
| 6771 return copy; |
| 6772 } |
| 6773 |
| 6774 // Rebasing/resetting history to deal with externally-sourced changes |
| 6775 |
| 6776 function rebaseHistSelSingle(pos, from, to, diff) { |
| 6777 if (to < pos.line) { |
| 6778 pos.line += diff; |
| 6779 } else if (from < pos.line) { |
| 6780 pos.line = from; |
| 6781 pos.ch = 0; |
| 6782 } |
| 6783 } |
| 6784 |
| 6785 // Tries to rebase an array of history events given a change in the |
| 6786 // document. If the change touches the same lines as the event, the |
| 6787 // event, and everything 'behind' it, is discarded. If the change is |
| 6788 // before the event, the event's positions are updated. Uses a |
| 6789 // copy-on-write scheme for the positions, to avoid having to |
| 6790 // reallocate them all on every rebase, but also avoid problems with |
| 6791 // shared position objects being unsafely updated. |
| 6792 function rebaseHistArray(array, from, to, diff) { |
| 6793 for (var i = 0; i < array.length; ++i) { |
| 6794 var sub = array[i], ok = true; |
| 6795 if (sub.ranges) { |
| 6796 if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; } |
| 6797 for (var j = 0; j < sub.ranges.length; j++) { |
| 6798 rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff); |
| 6799 rebaseHistSelSingle(sub.ranges[j].head, from, to, diff); |
| 6800 } |
| 6801 continue; |
| 6802 } |
| 6803 for (var j = 0; j < sub.changes.length; ++j) { |
| 6804 var cur = sub.changes[j]; |
| 6805 if (to < cur.from.line) { |
| 6806 cur.from = Pos(cur.from.line + diff, cur.from.ch); |
| 6807 cur.to = Pos(cur.to.line + diff, cur.to.ch); |
| 6808 } else if (from <= cur.to.line) { |
| 6809 ok = false; |
| 6810 break; |
| 6811 } |
| 6812 } |
| 6813 if (!ok) { |
| 6814 array.splice(0, i + 1); |
| 6815 i = 0; |
| 6816 } |
| 6817 } |
| 6818 } |
| 6819 |
| 6820 function rebaseHist(hist, change) { |
| 6821 var from = change.from.line, to = change.to.line, diff = change.text.length
- (to - from) - 1; |
| 6822 rebaseHistArray(hist.done, from, to, diff); |
| 6823 rebaseHistArray(hist.undone, from, to, diff); |
| 6824 } |
| 6825 |
| 6826 // EVENT UTILITIES |
| 6827 |
| 6828 // Due to the fact that we still support jurassic IE versions, some |
| 6829 // compatibility wrappers are needed. |
| 6830 |
| 6831 var e_preventDefault = CodeMirror.e_preventDefault = function(e) { |
| 6832 if (e.preventDefault) e.preventDefault(); |
| 6833 else e.returnValue = false; |
| 6834 }; |
| 6835 var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) { |
| 6836 if (e.stopPropagation) e.stopPropagation(); |
| 6837 else e.cancelBubble = true; |
| 6838 }; |
| 6839 function e_defaultPrevented(e) { |
| 6840 return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == fa
lse; |
| 6841 } |
| 6842 var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropa
gation(e);}; |
| 6843 |
| 6844 function e_target(e) {return e.target || e.srcElement;} |
| 6845 function e_button(e) { |
| 6846 var b = e.which; |
| 6847 if (b == null) { |
| 6848 if (e.button & 1) b = 1; |
| 6849 else if (e.button & 2) b = 3; |
| 6850 else if (e.button & 4) b = 2; |
| 6851 } |
| 6852 if (mac && e.ctrlKey && b == 1) b = 3; |
| 6853 return b; |
| 6854 } |
| 6855 |
| 6856 // EVENT HANDLING |
| 6857 |
| 6858 // Lightweight event framework. on/off also work on DOM nodes, |
| 6859 // registering native DOM handlers. |
| 6860 |
| 6861 var on = CodeMirror.on = function(emitter, type, f) { |
| 6862 if (emitter.addEventListener) |
| 6863 emitter.addEventListener(type, f, false); |
| 6864 else if (emitter.attachEvent) |
| 6865 emitter.attachEvent("on" + type, f); |
| 6866 else { |
| 6867 var map = emitter._handlers || (emitter._handlers = {}); |
| 6868 var arr = map[type] || (map[type] = []); |
| 6869 arr.push(f); |
| 6870 } |
| 6871 }; |
| 6872 |
| 6873 var off = CodeMirror.off = function(emitter, type, f) { |
| 6874 if (emitter.removeEventListener) |
| 6875 emitter.removeEventListener(type, f, false); |
| 6876 else if (emitter.detachEvent) |
| 6877 emitter.detachEvent("on" + type, f); |
| 6878 else { |
| 6879 var arr = emitter._handlers && emitter._handlers[type]; |
| 6880 if (!arr) return; |
| 6881 for (var i = 0; i < arr.length; ++i) |
| 6882 if (arr[i] == f) { arr.splice(i, 1); break; } |
| 6883 } |
| 6884 }; |
| 6885 |
| 6886 var signal = CodeMirror.signal = function(emitter, type /*, values...*/) { |
| 6887 var arr = emitter._handlers && emitter._handlers[type]; |
| 6888 if (!arr) return; |
| 6889 var args = Array.prototype.slice.call(arguments, 2); |
| 6890 for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args); |
| 6891 }; |
| 6892 |
| 6893 // Often, we want to signal events at a point where we are in the |
| 6894 // middle of some work, but don't want the handler to start calling |
| 6895 // other methods on the editor, which might be in an inconsistent |
| 6896 // state or simply not expect any other events to happen. |
| 6897 // signalLater looks whether there are any handlers, and schedules |
| 6898 // them to be executed when the last operation ends, or, if no |
| 6899 // operation is active, when a timeout fires. |
| 6900 var delayedCallbacks, delayedCallbackDepth = 0; |
| 6901 function signalLater(emitter, type /*, values...*/) { |
| 6902 var arr = emitter._handlers && emitter._handlers[type]; |
| 6903 if (!arr) return; |
| 6904 var args = Array.prototype.slice.call(arguments, 2); |
| 6905 if (!delayedCallbacks) { |
| 6906 ++delayedCallbackDepth; |
| 6907 delayedCallbacks = []; |
| 6908 setTimeout(fireDelayed, 0); |
| 6909 } |
| 6910 function bnd(f) {return function(){f.apply(null, args);};}; |
| 6911 for (var i = 0; i < arr.length; ++i) |
| 6912 delayedCallbacks.push(bnd(arr[i])); |
| 6913 } |
| 6914 |
| 6915 function fireDelayed() { |
| 6916 --delayedCallbackDepth; |
| 6917 var delayed = delayedCallbacks; |
| 6918 delayedCallbacks = null; |
| 6919 for (var i = 0; i < delayed.length; ++i) delayed[i](); |
| 6920 } |
| 6921 |
| 6922 // The DOM events that CodeMirror handles can be overridden by |
| 6923 // registering a (non-DOM) handler on the editor for the event name, |
| 6924 // and preventDefault-ing the event in that handler. |
| 6925 function signalDOMEvent(cm, e, override) { |
| 6926 signal(cm, override || e.type, cm, e); |
| 6927 return e_defaultPrevented(e) || e.codemirrorIgnore; |
| 6928 } |
| 6929 |
| 6930 function signalCursorActivity(cm) { |
| 6931 var arr = cm._handlers && cm._handlers.cursorActivity; |
| 6932 if (!arr) return; |
| 6933 var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandler
s = []); |
| 6934 for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1) |
| 6935 set.push(arr[i]); |
| 6936 } |
| 6937 |
| 6938 function hasHandler(emitter, type) { |
| 6939 var arr = emitter._handlers && emitter._handlers[type]; |
| 6940 return arr && arr.length > 0; |
| 6941 } |
| 6942 |
| 6943 // Add on and off methods to a constructor's prototype, to make |
| 6944 // registering events on such objects more convenient. |
| 6945 function eventMixin(ctor) { |
| 6946 ctor.prototype.on = function(type, f) {on(this, type, f);}; |
| 6947 ctor.prototype.off = function(type, f) {off(this, type, f);}; |
| 6948 } |
| 6949 |
| 6950 // MISC UTILITIES |
| 6951 |
| 6952 // Number of pixels added to scroller and sizer to hide scrollbar |
| 6953 var scrollerCutOff = 30; |
| 6954 |
| 6955 // Returned or thrown by various protocols to signal 'I'm not |
| 6956 // handling this'. |
| 6957 var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}}
; |
| 6958 |
| 6959 // Reused option objects for setSelection & friends |
| 6960 var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move
= {origin: "+move"}; |
| 6961 |
| 6962 function Delayed() {this.id = null;} |
| 6963 Delayed.prototype.set = function(ms, f) { |
| 6964 clearTimeout(this.id); |
| 6965 this.id = setTimeout(f, ms); |
| 6966 }; |
| 6967 |
| 6968 // Counts the column offset in a string, taking tabs into account. |
| 6969 // Used mostly to find indentation. |
| 6970 var countColumn = CodeMirror.countColumn = function(string, end, tabSize, star
tIndex, startValue) { |
| 6971 if (end == null) { |
| 6972 end = string.search(/[^\s\u00a0]/); |
| 6973 if (end == -1) end = string.length; |
| 6974 } |
| 6975 for (var i = startIndex || 0, n = startValue || 0;;) { |
| 6976 var nextTab = string.indexOf("\t", i); |
| 6977 if (nextTab < 0 || nextTab >= end) |
| 6978 return n + (end - i); |
| 6979 n += nextTab - i; |
| 6980 n += tabSize - (n % tabSize); |
| 6981 i = nextTab + 1; |
| 6982 } |
| 6983 }; |
| 6984 |
| 6985 // The inverse of countColumn -- find the offset that corresponds to |
| 6986 // a particular column. |
| 6987 function findColumn(string, goal, tabSize) { |
| 6988 for (var pos = 0, col = 0;;) { |
| 6989 var nextTab = string.indexOf("\t", pos); |
| 6990 if (nextTab == -1) nextTab = string.length; |
| 6991 var skipped = nextTab - pos; |
| 6992 if (nextTab == string.length || col + skipped >= goal) |
| 6993 return pos + Math.min(skipped, goal - col); |
| 6994 col += nextTab - pos; |
| 6995 col += tabSize - (col % tabSize); |
| 6996 pos = nextTab + 1; |
| 6997 if (col >= goal) return pos; |
| 6998 } |
| 6999 } |
| 7000 |
| 7001 var spaceStrs = [""]; |
| 7002 function spaceStr(n) { |
| 7003 while (spaceStrs.length <= n) |
| 7004 spaceStrs.push(lst(spaceStrs) + " "); |
| 7005 return spaceStrs[n]; |
| 7006 } |
| 7007 |
| 7008 function lst(arr) { return arr[arr.length-1]; } |
| 7009 |
| 7010 var selectInput = function(node) { node.select(); }; |
| 7011 if (ios) // Mobile Safari apparently has a bug where select() is broken. |
| 7012 selectInput = function(node) { node.selectionStart = 0; node.selectionEnd =
node.value.length; }; |
| 7013 else if (ie) // Suppress mysterious IE10 errors |
| 7014 selectInput = function(node) { try { node.select(); } catch(_e) {} }; |
| 7015 |
| 7016 function indexOf(array, elt) { |
| 7017 for (var i = 0; i < array.length; ++i) |
| 7018 if (array[i] == elt) return i; |
| 7019 return -1; |
| 7020 } |
| 7021 if ([].indexOf) indexOf = function(array, elt) { return array.indexOf(elt); }; |
| 7022 function map(array, f) { |
| 7023 var out = []; |
| 7024 for (var i = 0; i < array.length; i++) out[i] = f(array[i], i); |
| 7025 return out; |
| 7026 } |
| 7027 if ([].map) map = function(array, f) { return array.map(f); }; |
| 7028 |
| 7029 function createObj(base, props) { |
| 7030 var inst; |
| 7031 if (Object.create) { |
| 7032 inst = Object.create(base); |
| 7033 } else { |
| 7034 var ctor = function() {}; |
| 7035 ctor.prototype = base; |
| 7036 inst = new ctor(); |
| 7037 } |
| 7038 if (props) copyObj(props, inst); |
| 7039 return inst; |
| 7040 }; |
| 7041 |
| 7042 function copyObj(obj, target, overwrite) { |
| 7043 if (!target) target = {}; |
| 7044 for (var prop in obj) |
| 7045 if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProp
erty(prop))) |
| 7046 target[prop] = obj[prop]; |
| 7047 return target; |
| 7048 } |
| 7049 |
| 7050 function bind(f) { |
| 7051 var args = Array.prototype.slice.call(arguments, 1); |
| 7052 return function(){return f.apply(null, args);}; |
| 7053 } |
| 7054 |
| 7055 var nonASCIISingleCaseWordChar = /[\u00df\u3040-\u309f\u30a0-\u30ff\u3400-\u4d
b5\u4e00-\u9fcc\uac00-\ud7af]/; |
| 7056 var isWordChar = CodeMirror.isWordChar = function(ch) { |
| 7057 return /\w/.test(ch) || ch > "\x80" && |
| 7058 (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(c
h)); |
| 7059 }; |
| 7060 |
| 7061 function isEmpty(obj) { |
| 7062 for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false; |
| 7063 return true; |
| 7064 } |
| 7065 |
| 7066 // Extending unicode characters. A series of a non-extending char + |
| 7067 // any number of extending chars is treated as a single unit as far |
| 7068 // as editing and measuring is concerned. This is not fully correct, |
| 7069 // since some scripts/fonts/browsers also treat other configurations |
| 7070 // of code points as a group. |
| 7071 var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05
c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u
06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u081
9\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u
0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u
0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0
a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b
3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3
e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0c
c6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d6
3\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0e
b4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0
f80-\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-\u17b
d\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u19
39-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u
1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-
\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1c
e8\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\ua9b
3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab
2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe0
0-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/; |
| 7072 function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChar
s.test(ch); } |
| 7073 |
| 7074 // DOM UTILITIES |
| 7075 |
| 7076 function elt(tag, content, className, style) { |
| 7077 var e = document.createElement(tag); |
| 7078 if (className) e.className = className; |
| 7079 if (style) e.style.cssText = style; |
| 7080 if (typeof content == "string") e.appendChild(document.createTextNode(conten
t)); |
| 7081 else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(con
tent[i]); |
| 7082 return e; |
| 7083 } |
| 7084 |
| 7085 var range; |
| 7086 if (document.createRange) range = function(node, start, end) { |
| 7087 var r = document.createRange(); |
| 7088 r.setEnd(node, end); |
| 7089 r.setStart(node, start); |
| 7090 return r; |
| 7091 }; |
| 7092 else range = function(node, start, end) { |
| 7093 var r = document.body.createTextRange(); |
| 7094 r.moveToElementText(node.parentNode); |
| 7095 r.collapse(true); |
| 7096 r.moveEnd("character", end); |
| 7097 r.moveStart("character", start); |
| 7098 return r; |
| 7099 }; |
| 7100 |
| 7101 function removeChildren(e) { |
| 7102 for (var count = e.childNodes.length; count > 0; --count) |
| 7103 e.removeChild(e.firstChild); |
| 7104 return e; |
| 7105 } |
| 7106 |
| 7107 function removeChildrenAndAdd(parent, e) { |
| 7108 return removeChildren(parent).appendChild(e); |
| 7109 } |
| 7110 |
| 7111 function contains(parent, child) { |
| 7112 if (parent.contains) |
| 7113 return parent.contains(child); |
| 7114 while (child = child.parentNode) |
| 7115 if (child == parent) return true; |
| 7116 } |
| 7117 |
| 7118 function activeElt() { return document.activeElement; } |
| 7119 // Older versions of IE throws unspecified error when touching |
| 7120 // document.activeElement in some cases (during loading, in iframe) |
| 7121 if (ie_upto10) activeElt = function() { |
| 7122 try { return document.activeElement; } |
| 7123 catch(e) { return document.body; } |
| 7124 }; |
| 7125 |
| 7126 function classTest(cls) { return new RegExp("\\b" + cls + "\\b\\s*"); } |
| 7127 function rmClass(node, cls) { |
| 7128 var test = classTest(cls); |
| 7129 if (test.test(node.className)) node.className = node.className.replace(test,
""); |
| 7130 } |
| 7131 function addClass(node, cls) { |
| 7132 if (!classTest(cls).test(node.className)) node.className += " " + cls; |
| 7133 } |
| 7134 function joinClasses(a, b) { |
| 7135 var as = a.split(" "); |
| 7136 for (var i = 0; i < as.length; i++) |
| 7137 if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i]; |
| 7138 return b; |
| 7139 } |
| 7140 |
| 7141 // FEATURE DETECTION |
| 7142 |
| 7143 // Detect drag-and-drop |
| 7144 var dragAndDrop = function() { |
| 7145 // There is *some* kind of drag-and-drop support in IE6-8, but I |
| 7146 // couldn't get it to work yet. |
| 7147 if (ie_upto8) return false; |
| 7148 var div = elt('div'); |
| 7149 return "draggable" in div || "dragDrop" in div; |
| 7150 }(); |
| 7151 |
| 7152 var knownScrollbarWidth; |
| 7153 function scrollbarWidth(measure) { |
| 7154 if (knownScrollbarWidth != null) return knownScrollbarWidth; |
| 7155 var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: sc
roll"); |
| 7156 removeChildrenAndAdd(measure, test); |
| 7157 if (test.offsetWidth) |
| 7158 knownScrollbarWidth = test.offsetHeight - test.clientHeight; |
| 7159 return knownScrollbarWidth || 0; |
| 7160 } |
| 7161 |
| 7162 var zwspSupported; |
| 7163 function zeroWidthElement(measure) { |
| 7164 if (zwspSupported == null) { |
| 7165 var test = elt("span", "\u200b"); |
| 7166 removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("
x")])); |
| 7167 if (measure.firstChild.offsetHeight != 0) |
| 7168 zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_up
to7; |
| 7169 } |
| 7170 if (zwspSupported) return elt("span", "\u200b"); |
| 7171 else return elt("span", "\u00a0", null, "display: inline-block; width: 1px;
margin-right: -1px"); |
| 7172 } |
| 7173 |
| 7174 // Feature-detect IE's crummy client rect reporting for bidi text |
| 7175 var badBidiRects; |
| 7176 function hasBadBidiRects(measure) { |
| 7177 if (badBidiRects != null) return badBidiRects; |
| 7178 var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA"))
; |
| 7179 var r0 = range(txt, 0, 1).getBoundingClientRect(); |
| 7180 if (r0.left == r0.right) return false; |
| 7181 var r1 = range(txt, 1, 2).getBoundingClientRect(); |
| 7182 return badBidiRects = (r1.right - r0.right < 3); |
| 7183 } |
| 7184 |
| 7185 // See if "".split is the broken IE version, if so, provide an |
| 7186 // alternative way to split lines. |
| 7187 var splitLines = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? fun
ction(string) { |
| 7188 var pos = 0, result = [], l = string.length; |
| 7189 while (pos <= l) { |
| 7190 var nl = string.indexOf("\n", pos); |
| 7191 if (nl == -1) nl = string.length; |
| 7192 var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl); |
| 7193 var rt = line.indexOf("\r"); |
| 7194 if (rt != -1) { |
| 7195 result.push(line.slice(0, rt)); |
| 7196 pos += rt + 1; |
| 7197 } else { |
| 7198 result.push(line); |
| 7199 pos = nl + 1; |
| 7200 } |
| 7201 } |
| 7202 return result; |
| 7203 } : function(string){return string.split(/\r\n?|\n/);}; |
| 7204 |
| 7205 var hasSelection = window.getSelection ? function(te) { |
| 7206 try { return te.selectionStart != te.selectionEnd; } |
| 7207 catch(e) { return false; } |
| 7208 } : function(te) { |
| 7209 try {var range = te.ownerDocument.selection.createRange();} |
| 7210 catch(e) {} |
| 7211 if (!range || range.parentElement() != te) return false; |
| 7212 return range.compareEndPoints("StartToEnd", range) != 0; |
| 7213 }; |
| 7214 |
| 7215 var hasCopyEvent = (function() { |
| 7216 var e = elt("div"); |
| 7217 if ("oncopy" in e) return true; |
| 7218 e.setAttribute("oncopy", "return;"); |
| 7219 return typeof e.oncopy == "function"; |
| 7220 })(); |
| 7221 |
| 7222 // KEY NAMES |
| 7223 |
| 7224 var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift"
, 17: "Ctrl", 18: "Alt", |
| 7225 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "Page
Up", 34: "PageDown", 35: "End", |
| 7226 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44:
"PrintScrn", 45: "Insert", |
| 7227 46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod
", 107: "=", 109: "-", 127: "Delete", |
| 7228 173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 19
1: "/", 192: "`", 219: "[", 220: "\\", |
| 7229 221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left",
63235: "Right", 63272: "Delete", |
| 7230 63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown
", 63302: "Insert"}; |
| 7231 CodeMirror.keyNames = keyNames; |
| 7232 (function() { |
| 7233 // Number keys |
| 7234 for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i)
; |
| 7235 // Alphabetic keys |
| 7236 for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i); |
| 7237 // Function keys |
| 7238 for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F"
+ i; |
| 7239 })(); |
| 7240 |
| 7241 // BIDI HELPERS |
| 7242 |
| 7243 function iterateBidiSections(order, from, to, f) { |
| 7244 if (!order) return f(from, to, "ltr"); |
| 7245 var found = false; |
| 7246 for (var i = 0; i < order.length; ++i) { |
| 7247 var part = order[i]; |
| 7248 if (part.from < to && part.to > from || from == to && part.to == from) { |
| 7249 f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "r
tl" : "ltr"); |
| 7250 found = true; |
| 7251 } |
| 7252 } |
| 7253 if (!found) f(from, to, "ltr"); |
| 7254 } |
| 7255 |
| 7256 function bidiLeft(part) { return part.level % 2 ? part.to : part.from; } |
| 7257 function bidiRight(part) { return part.level % 2 ? part.from : part.to; } |
| 7258 |
| 7259 function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(
order[0]) : 0; } |
| 7260 function lineRight(line) { |
| 7261 var order = getOrder(line); |
| 7262 if (!order) return line.text.length; |
| 7263 return bidiRight(lst(order)); |
| 7264 } |
| 7265 |
| 7266 function lineStart(cm, lineN) { |
| 7267 var line = getLine(cm.doc, lineN); |
| 7268 var visual = visualLine(line); |
| 7269 if (visual != line) lineN = lineNo(visual); |
| 7270 var order = getOrder(visual); |
| 7271 var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visu
al); |
| 7272 return Pos(lineN, ch); |
| 7273 } |
| 7274 function lineEnd(cm, lineN) { |
| 7275 var merged, line = getLine(cm.doc, lineN); |
| 7276 while (merged = collapsedSpanAtEnd(line)) { |
| 7277 line = merged.find(1, true).line; |
| 7278 lineN = null; |
| 7279 } |
| 7280 var order = getOrder(line); |
| 7281 var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : l
ineRight(line); |
| 7282 return Pos(lineN == null ? lineNo(line) : lineN, ch); |
| 7283 } |
| 7284 |
| 7285 function compareBidiLevel(order, a, b) { |
| 7286 var linedir = order[0].level; |
| 7287 if (a == linedir) return true; |
| 7288 if (b == linedir) return false; |
| 7289 return a < b; |
| 7290 } |
| 7291 var bidiOther; |
| 7292 function getBidiPartAt(order, pos) { |
| 7293 bidiOther = null; |
| 7294 for (var i = 0, found; i < order.length; ++i) { |
| 7295 var cur = order[i]; |
| 7296 if (cur.from < pos && cur.to > pos) return i; |
| 7297 if ((cur.from == pos || cur.to == pos)) { |
| 7298 if (found == null) { |
| 7299 found = i; |
| 7300 } else if (compareBidiLevel(order, cur.level, order[found].level)) { |
| 7301 if (cur.from != cur.to) bidiOther = found; |
| 7302 return i; |
| 7303 } else { |
| 7304 if (cur.from != cur.to) bidiOther = i; |
| 7305 return found; |
| 7306 } |
| 7307 } |
| 7308 } |
| 7309 return found; |
| 7310 } |
| 7311 |
| 7312 function moveInLine(line, pos, dir, byUnit) { |
| 7313 if (!byUnit) return pos + dir; |
| 7314 do pos += dir; |
| 7315 while (pos > 0 && isExtendingChar(line.text.charAt(pos))); |
| 7316 return pos; |
| 7317 } |
| 7318 |
| 7319 // This is needed in order to move 'visually' through bi-directional |
| 7320 // text -- i.e., pressing left should make the cursor go left, even |
| 7321 // when in RTL text. The tricky part is the 'jumps', where RTL and |
| 7322 // LTR text touch each other. This often requires the cursor offset |
| 7323 // to move more than one unit, in order to visually move one unit. |
| 7324 function moveVisually(line, start, dir, byUnit) { |
| 7325 var bidi = getOrder(line); |
| 7326 if (!bidi) return moveLogically(line, start, dir, byUnit); |
| 7327 var pos = getBidiPartAt(bidi, start), part = bidi[pos]; |
| 7328 var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit); |
| 7329 |
| 7330 for (;;) { |
| 7331 if (target > part.from && target < part.to) return target; |
| 7332 if (target == part.from || target == part.to) { |
| 7333 if (getBidiPartAt(bidi, target) == pos) return target; |
| 7334 part = bidi[pos += dir]; |
| 7335 return (dir > 0) == part.level % 2 ? part.to : part.from; |
| 7336 } else { |
| 7337 part = bidi[pos += dir]; |
| 7338 if (!part) return null; |
| 7339 if ((dir > 0) == part.level % 2) |
| 7340 target = moveInLine(line, part.to, -1, byUnit); |
| 7341 else |
| 7342 target = moveInLine(line, part.from, 1, byUnit); |
| 7343 } |
| 7344 } |
| 7345 } |
| 7346 |
| 7347 function moveLogically(line, start, dir, byUnit) { |
| 7348 var target = start + dir; |
| 7349 if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target)))
target += dir; |
| 7350 return target < 0 || target > line.text.length ? null : target; |
| 7351 } |
| 7352 |
| 7353 // Bidirectional ordering algorithm |
| 7354 // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm |
| 7355 // that this (partially) implements. |
| 7356 |
| 7357 // One-char codes used for character types: |
| 7358 // L (L): Left-to-Right |
| 7359 // R (R): Right-to-Left |
| 7360 // r (AL): Right-to-Left Arabic |
| 7361 // 1 (EN): European Number |
| 7362 // + (ES): European Number Separator |
| 7363 // % (ET): European Number Terminator |
| 7364 // n (AN): Arabic Number |
| 7365 // , (CS): Common Number Separator |
| 7366 // m (NSM): Non-Spacing Mark |
| 7367 // b (BN): Boundary Neutral |
| 7368 // s (B): Paragraph Separator |
| 7369 // t (S): Segment Separator |
| 7370 // w (WS): Whitespace |
| 7371 // N (ON): Other Neutrals |
| 7372 |
| 7373 // Returns null if characters are ordered as they appear |
| 7374 // (left-to-right), or an array of sections ({from, to, level} |
| 7375 // objects) in the order in which they occur visually. |
| 7376 var bidiOrdering = (function() { |
| 7377 // Character types for codepoints 0 to 0xff |
| 7378 var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NN
NNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbb
bbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLL
LLLLLLLLLLLLLLLLLLLLLLLLLLLN"; |
| 7379 // Character types for codepoints 0x600 to 0x6ff |
| 7380 var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
rrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrr
rrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmm
mmmmmmmmmmmmmmmmNmmmm"; |
| 7381 function charType(code) { |
| 7382 if (code <= 0xf7) return lowTypes.charAt(code); |
| 7383 else if (0x590 <= code && code <= 0x5f4) return "R"; |
| 7384 else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code -
0x600); |
| 7385 else if (0x6ee <= code && code <= 0x8ac) return "r"; |
| 7386 else if (0x2000 <= code && code <= 0x200b) return "w"; |
| 7387 else if (code == 0x200c) return "b"; |
| 7388 else return "L"; |
| 7389 } |
| 7390 |
| 7391 var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/; |
| 7392 var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, count
sAsNum = /[1n]/; |
| 7393 // Browsers seem to always treat the boundaries of block elements as being L
. |
| 7394 var outerType = "L"; |
| 7395 |
| 7396 function BidiSpan(level, from, to) { |
| 7397 this.level = level; |
| 7398 this.from = from; this.to = to; |
| 7399 } |
| 7400 |
| 7401 return function(str) { |
| 7402 if (!bidiRE.test(str)) return false; |
| 7403 var len = str.length, types = []; |
| 7404 for (var i = 0, type; i < len; ++i) |
| 7405 types.push(type = charType(str.charCodeAt(i))); |
| 7406 |
| 7407 // W1. Examine each non-spacing mark (NSM) in the level run, and |
| 7408 // change the type of the NSM to the type of the previous |
| 7409 // character. If the NSM is at the start of the level run, it will |
| 7410 // get the type of sor. |
| 7411 for (var i = 0, prev = outerType; i < len; ++i) { |
| 7412 var type = types[i]; |
| 7413 if (type == "m") types[i] = prev; |
| 7414 else prev = type; |
| 7415 } |
| 7416 |
| 7417 // W2. Search backwards from each instance of a European number |
| 7418 // until the first strong type (R, L, AL, or sor) is found. If an |
| 7419 // AL is found, change the type of the European number to Arabic |
| 7420 // number. |
| 7421 // W3. Change all ALs to R. |
| 7422 for (var i = 0, cur = outerType; i < len; ++i) { |
| 7423 var type = types[i]; |
| 7424 if (type == "1" && cur == "r") types[i] = "n"; |
| 7425 else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] =
"R"; } |
| 7426 } |
| 7427 |
| 7428 // W4. A single European separator between two European numbers |
| 7429 // changes to a European number. A single common separator between |
| 7430 // two numbers of the same type changes to that type. |
| 7431 for (var i = 1, prev = types[0]; i < len - 1; ++i) { |
| 7432 var type = types[i]; |
| 7433 if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1"; |
| 7434 else if (type == "," && prev == types[i+1] && |
| 7435 (prev == "1" || prev == "n")) types[i] = prev; |
| 7436 prev = type; |
| 7437 } |
| 7438 |
| 7439 // W5. A sequence of European terminators adjacent to European |
| 7440 // numbers changes to all European numbers. |
| 7441 // W6. Otherwise, separators and terminators change to Other |
| 7442 // Neutral. |
| 7443 for (var i = 0; i < len; ++i) { |
| 7444 var type = types[i]; |
| 7445 if (type == ",") types[i] = "N"; |
| 7446 else if (type == "%") { |
| 7447 for (var end = i + 1; end < len && types[end] == "%"; ++end) {} |
| 7448 var replace = (i && types[i-1] == "!") || (end < len && types[end] ==
"1") ? "1" : "N"; |
| 7449 for (var j = i; j < end; ++j) types[j] = replace; |
| 7450 i = end - 1; |
| 7451 } |
| 7452 } |
| 7453 |
| 7454 // W7. Search backwards from each instance of a European number |
| 7455 // until the first strong type (R, L, or sor) is found. If an L is |
| 7456 // found, then change the type of the European number to L. |
| 7457 for (var i = 0, cur = outerType; i < len; ++i) { |
| 7458 var type = types[i]; |
| 7459 if (cur == "L" && type == "1") types[i] = "L"; |
| 7460 else if (isStrong.test(type)) cur = type; |
| 7461 } |
| 7462 |
| 7463 // N1. A sequence of neutrals takes the direction of the |
| 7464 // surrounding strong text if the text on both sides has the same |
| 7465 // direction. European and Arabic numbers act as if they were R in |
| 7466 // terms of their influence on neutrals. Start-of-level-run (sor) |
| 7467 // and end-of-level-run (eor) are used at level run boundaries. |
| 7468 // N2. Any remaining neutrals take the embedding direction. |
| 7469 for (var i = 0; i < len; ++i) { |
| 7470 if (isNeutral.test(types[i])) { |
| 7471 for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end)
{} |
| 7472 var before = (i ? types[i-1] : outerType) == "L"; |
| 7473 var after = (end < len ? types[end] : outerType) == "L"; |
| 7474 var replace = before || after ? "L" : "R"; |
| 7475 for (var j = i; j < end; ++j) types[j] = replace; |
| 7476 i = end - 1; |
| 7477 } |
| 7478 } |
| 7479 |
| 7480 // Here we depart from the documented algorithm, in order to avoid |
| 7481 // building up an actual levels array. Since there are only three |
| 7482 // levels (0, 1, 2) in an implementation that doesn't take |
| 7483 // explicit embedding into account, we can build up the order on |
| 7484 // the fly, without following the level-based algorithm. |
| 7485 var order = [], m; |
| 7486 for (var i = 0; i < len;) { |
| 7487 if (countsAsLeft.test(types[i])) { |
| 7488 var start = i; |
| 7489 for (++i; i < len && countsAsLeft.test(types[i]); ++i) {} |
| 7490 order.push(new BidiSpan(0, start, i)); |
| 7491 } else { |
| 7492 var pos = i, at = order.length; |
| 7493 for (++i; i < len && types[i] != "L"; ++i) {} |
| 7494 for (var j = pos; j < i;) { |
| 7495 if (countsAsNum.test(types[j])) { |
| 7496 if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j)); |
| 7497 var nstart = j; |
| 7498 for (++j; j < i && countsAsNum.test(types[j]); ++j) {} |
| 7499 order.splice(at, 0, new BidiSpan(2, nstart, j)); |
| 7500 pos = j; |
| 7501 } else ++j; |
| 7502 } |
| 7503 if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i)); |
| 7504 } |
| 7505 } |
| 7506 if (order[0].level == 1 && (m = str.match(/^\s+/))) { |
| 7507 order[0].from = m[0].length; |
| 7508 order.unshift(new BidiSpan(0, 0, m[0].length)); |
| 7509 } |
| 7510 if (lst(order).level == 1 && (m = str.match(/\s+$/))) { |
| 7511 lst(order).to -= m[0].length; |
| 7512 order.push(new BidiSpan(0, len - m[0].length, len)); |
| 7513 } |
| 7514 if (order[0].level != lst(order).level) |
| 7515 order.push(new BidiSpan(order[0].level, len, len)); |
| 7516 |
| 7517 return order; |
| 7518 }; |
| 7519 })(); |
| 7520 |
| 7521 // THE END |
| 7522 |
| 7523 CodeMirror.version = "4.1.0"; |
| 7524 |
| 7525 return CodeMirror; |
| 7526 }); |
OLD | NEW |