| // This is CodeMirror (http://codemirror.net), a code editor |
| // implemented in JavaScript on top of the browser's DOM. |
| // |
| // You can find some technical background for some of the code below |
| // at http://marijnhaverbeke.nl/blog/#cm-internals . |
| |
| (function(mod) { |
| if (typeof exports == "object" && typeof module == "object") // CommonJS |
| module.exports = mod(); |
| else if (typeof define == "function" && define.amd) // AMD |
| return define([], mod); |
| else // Plain browser env |
| this.CodeMirror = mod(); |
| })(function() { |
| "use strict"; |
| |
| // BROWSER SNIFFING |
| |
| // Kludges for bugs and behavior differences that can't be feature |
| // detected are enabled based on userAgent etc sniffing. |
| |
| var gecko = /gecko\/\d/i.test(navigator.userAgent); |
| // ie_uptoN means Internet Explorer version N or lower |
| var ie_upto10 = /MSIE \d/.test(navigator.userAgent); |
| var ie_upto7 = ie_upto10 && (document.documentMode == null || document.documentMode < 8); |
| var ie_upto8 = ie_upto10 && (document.documentMode == null || document.documentMode < 9); |
| var ie_upto9 = ie_upto10 && (document.documentMode == null || document.documentMode < 10); |
| var ie_11up = /Trident\/([7-9]|\d{2,})\./.test(navigator.userAgent); |
| var ie = ie_upto10 || ie_11up; |
| var webkit = /WebKit\//.test(navigator.userAgent); |
| var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent); |
| var chrome = /Chrome\//.test(navigator.userAgent); |
| var presto = /Opera\//.test(navigator.userAgent); |
| var safari = /Apple Computer/.test(navigator.vendor); |
| var khtml = /KHTML\//.test(navigator.userAgent); |
| var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent); |
| var phantom = /PhantomJS/.test(navigator.userAgent); |
| |
| var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent); |
| // This is woefully incomplete. Suggestions for alternative methods welcome. |
| var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(navigator.userAgent); |
| var mac = ios || /Mac/.test(navigator.platform); |
| var windows = /win/i.test(navigator.platform); |
| |
| var presto_version = presto && navigator.userAgent.match(/Version\/(\d*\.\d*)/); |
| if (presto_version) presto_version = Number(presto_version[1]); |
| if (presto_version && presto_version >= 15) { presto = false; webkit = true; } |
| // Some browsers use the wrong event properties to signal cmd/ctrl on OS X |
| var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11)); |
| var captureRightClick = gecko || (ie && !ie_upto8); |
| |
| // Optimize some code when these features are not used. |
| var sawReadOnlySpans = false, sawCollapsedSpans = false; |
| |
| // EDITOR CONSTRUCTOR |
| |
| // A CodeMirror instance represents an editor. This is the object |
| // that user code is usually dealing with. |
| |
| function CodeMirror(place, options) { |
| if (!(this instanceof CodeMirror)) return new CodeMirror(place, options); |
| |
| this.options = options = options || {}; |
| // Determine effective options based on given values and defaults. |
| copyObj(defaults, options, false); |
| setGuttersForLineNumbers(options); |
| |
| var doc = options.value; |
| if (typeof doc == "string") doc = new Doc(doc, options.mode); |
| this.doc = doc; |
| |
| var display = this.display = new Display(place, doc); |
| display.wrapper.CodeMirror = this; |
| updateGutters(this); |
| themeChanged(this); |
| if (options.lineWrapping) |
| this.display.wrapper.className += " CodeMirror-wrap"; |
| if (options.autofocus && !mobile) focusInput(this); |
| |
| this.state = { |
| keyMaps: [], // stores maps added by addKeyMap |
| overlays: [], // highlighting overlays, as added by addOverlay |
| modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info |
| overwrite: false, focused: false, |
| suppressEdits: false, // used to disable editing during key handlers when in readOnly mode |
| pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in readInput |
| draggingText: false, |
| highlight: new Delayed() // stores highlight worker timeout |
| }; |
| |
| // Override magic textarea content restore that IE sometimes does |
| // on our hidden textarea on reload |
| if (ie_upto10) setTimeout(bind(resetInput, this, true), 20); |
| |
| registerEventHandlers(this); |
| |
| var cm = this; |
| runInOp(this, function() { |
| cm.curOp.forceUpdate = true; |
| attachDoc(cm, doc); |
| |
| if ((options.autofocus && !mobile) || activeElt() == display.input) |
| setTimeout(bind(onFocus, cm), 20); |
| else |
| onBlur(cm); |
| |
| for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt)) |
| optionHandlers[opt](cm, options[opt], Init); |
| for (var i = 0; i < initHooks.length; ++i) initHooks[i](cm); |
| }); |
| } |
| |
| // DISPLAY CONSTRUCTOR |
| |
| // The display handles the DOM integration, both for input reading |
| // and content drawing. It holds references to DOM nodes and |
| // display-related state. |
| |
| function Display(place, doc) { |
| var d = this; |
| |
| // The semihidden textarea that is focused when the editor is |
| // focused, and receives input. |
| var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none"); |
| // The textarea is kept positioned near the cursor to prevent the |
| // fact that it'll be scrolled into view on input from scrolling |
| // our fake cursor out of view. On webkit, when wrap=off, paste is |
| // very slow. So make the area wide instead. |
| if (webkit) input.style.width = "1000px"; |
| else input.setAttribute("wrap", "off"); |
| // If border: 0; -- iOS fails to open keyboard (issue #1287) |
| if (ios) input.style.border = "1px solid black"; |
| input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off"); input.setAttribute("spellcheck", "false"); |
| |
| // Wraps and hides input textarea |
| d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;"); |
| // The fake scrollbar elements. |
| d.scrollbarH = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar"); |
| d.scrollbarV = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar"); |
| // Covers bottom-right square when both scrollbars are present. |
| d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler"); |
| // Covers bottom of gutter when coverGutterNextToScrollbar is on |
| // and h scrollbar is present. |
| d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler"); |
| // Will contain the actual code, positioned to cover the viewport. |
| d.lineDiv = elt("div", null, "CodeMirror-code"); |
| // Elements are added to these to represent selection and cursors. |
| d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1"); |
| d.cursorDiv = elt("div", null, "CodeMirror-cursors"); |
| // A visibility: hidden element used to find the size of things. |
| d.measure = elt("div", null, "CodeMirror-measure"); |
| // When lines outside of the viewport are measured, they are drawn in this. |
| d.lineMeasure = elt("div", null, "CodeMirror-measure"); |
| // Wraps everything that needs to exist inside the vertically-padded coordinate system |
| d.lineSpace = elt("div", [d.measure, d.lineMeasure, d.selectionDiv, d.cursorDiv, d.lineDiv], |
| null, "position: relative; outline: none"); |
| // Moved around its parent to cover visible view. |
| d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative"); |
| // Set to the height of the document, allowing scrolling. |
| d.sizer = elt("div", [d.mover], "CodeMirror-sizer"); |
| // Behavior of elts with overflow: auto and padding is |
| // inconsistent across browsers. This is used to ensure the |
| // scrollable area is big enough. |
| d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerCutOff + "px; width: 1px;"); |
| // Will contain the gutters, if any. |
| d.gutters = elt("div", null, "CodeMirror-gutters"); |
| d.lineGutter = null; |
| // Actual scrollable element. |
| d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll"); |
| d.scroller.setAttribute("tabIndex", "-1"); |
| // The element in which the editor lives. |
| d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV, |
| d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror"); |
| |
| // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported) |
| if (ie_upto7) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; } |
| // Needed to hide big blue blinking cursor on Mobile Safari |
| if (ios) input.style.width = "0px"; |
| if (!webkit) d.scroller.draggable = true; |
| // Needed to handle Tab key in KHTML |
| if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; } |
| // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8). |
| if (ie_upto7) d.scrollbarH.style.minHeight = d.scrollbarV.style.minWidth = "18px"; |
| |
| if (place.appendChild) place.appendChild(d.wrapper); |
| else place(d.wrapper); |
| |
| // Current rendered range (may be bigger than the view window). |
| d.viewFrom = d.viewTo = doc.first; |
| // Information about the rendered lines. |
| d.view = []; |
| // Holds info about a single rendered line when it was rendered |
| // for measurement, while not in view. |
| d.externalMeasured = null; |
| // Empty space (in pixels) above the view |
| d.viewOffset = 0; |
| d.lastSizeC = 0; |
| d.updateLineNumbers = null; |
| |
| // Used to only resize the line number gutter when necessary (when |
| // the amount of lines crosses a boundary that makes its width change) |
| d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null; |
| // See readInput and resetInput |
| d.prevInput = ""; |
| // Set to true when a non-horizontal-scrolling line widget is |
| // added. As an optimization, line widget aligning is skipped when |
| // this is false. |
| d.alignWidgets = false; |
| // Flag that indicates whether we expect input to appear real soon |
| // now (after some event like 'keypress' or 'input') and are |
| // polling intensively. |
| d.pollingFast = false; |
| // Self-resetting timeout for the poller |
| d.poll = new Delayed(); |
| |
| d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null; |
| |
| // Tracks when resetInput has punted to just putting a short |
| // string into the textarea instead of the full selection. |
| d.inaccurateSelection = false; |
| |
| // Tracks the maximum line length so that the horizontal scrollbar |
| // can be kept static when scrolling. |
| d.maxLine = null; |
| d.maxLineLength = 0; |
| d.maxLineChanged = false; |
| |
| // Used for measuring wheel scrolling granularity |
| d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null; |
| |
| // True when shift is held down. |
| d.shift = false; |
| } |
| |
| // STATE UPDATES |
| |
| // Used to get the editor into a consistent state again when options change. |
| |
| function loadMode(cm) { |
| cm.doc.mode = CodeMirror.getMode(cm.options, cm.doc.modeOption); |
| resetModeState(cm); |
| } |
| |
| function resetModeState(cm) { |
| cm.doc.iter(function(line) { |
| if (line.stateAfter) line.stateAfter = null; |
| if (line.styles) line.styles = null; |
| }); |
| cm.doc.frontier = cm.doc.first; |
| startWorker(cm, 100); |
| cm.state.modeGen++; |
| if (cm.curOp) regChange(cm); |
| } |
| |
| function wrappingChanged(cm) { |
| if (cm.options.lineWrapping) { |
| addClass(cm.display.wrapper, "CodeMirror-wrap"); |
| cm.display.sizer.style.minWidth = ""; |
| } else { |
| rmClass(cm.display.wrapper, "CodeMirror-wrap"); |
| findMaxLine(cm); |
| } |
| estimateLineHeights(cm); |
| regChange(cm); |
| clearCaches(cm); |
| setTimeout(function(){updateScrollbars(cm);}, 100); |
| } |
| |
| // Returns a function that estimates the height of a line, to use as |
| // first approximation until the line becomes visible (and is thus |
| // properly measurable). |
| function estimateHeight(cm) { |
| var th = textHeight(cm.display), wrapping = cm.options.lineWrapping; |
| var perLine = wrapping && Math.max(5, cm.display.scroller.clientWidth / charWidth(cm.display) - 3); |
| return function(line) { |
| if (lineIsHidden(cm.doc, line)) return 0; |
| |
| var widgetsHeight = 0; |
| if (line.widgets) for (var i = 0; i < line.widgets.length; i++) { |
| if (line.widgets[i].height) widgetsHeight += line.widgets[i].height; |
| } |
| |
| if (wrapping) |
| return widgetsHeight + (Math.ceil(line.text.length / perLine) || 1) * th; |
| else |
| return widgetsHeight + th; |
| }; |
| } |
| |
| function estimateLineHeights(cm) { |
| var doc = cm.doc, est = estimateHeight(cm); |
| doc.iter(function(line) { |
| var estHeight = est(line); |
| if (estHeight != line.height) updateLineHeight(line, estHeight); |
| }); |
| } |
| |
| function keyMapChanged(cm) { |
| var map = keyMap[cm.options.keyMap], style = map.style; |
| cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") + |
| (style ? " cm-keymap-" + style : ""); |
| } |
| |
| function themeChanged(cm) { |
| cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") + |
| cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-"); |
| clearCaches(cm); |
| } |
| |
| function guttersChanged(cm) { |
| updateGutters(cm); |
| regChange(cm); |
| setTimeout(function(){alignHorizontally(cm);}, 20); |
| } |
| |
| // Rebuild the gutter elements, ensure the margin to the left of the |
| // code matches their width. |
| function updateGutters(cm) { |
| var gutters = cm.display.gutters, specs = cm.options.gutters; |
| removeChildren(gutters); |
| for (var i = 0; i < specs.length; ++i) { |
| var gutterClass = specs[i]; |
| var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass)); |
| if (gutterClass == "CodeMirror-linenumbers") { |
| cm.display.lineGutter = gElt; |
| gElt.style.width = (cm.display.lineNumWidth || 1) + "px"; |
| } |
| } |
| gutters.style.display = i ? "" : "none"; |
| updateGutterSpace(cm); |
| } |
| |
| function updateGutterSpace(cm) { |
| var width = cm.display.gutters.offsetWidth; |
| cm.display.sizer.style.marginLeft = width + "px"; |
| cm.display.scrollbarH.style.left = cm.options.fixedGutter ? width + "px" : 0; |
| } |
| |
| // Compute the character length of a line, taking into account |
| // collapsed ranges (see markText) that might hide parts, and join |
| // other lines onto it. |
| function lineLength(line) { |
| if (line.height == 0) return 0; |
| var len = line.text.length, merged, cur = line; |
| while (merged = collapsedSpanAtStart(cur)) { |
| var found = merged.find(0, true); |
| cur = found.from.line; |
| len += found.from.ch - found.to.ch; |
| } |
| cur = line; |
| while (merged = collapsedSpanAtEnd(cur)) { |
| var found = merged.find(0, true); |
| len -= cur.text.length - found.from.ch; |
| cur = found.to.line; |
| len += cur.text.length - found.to.ch; |
| } |
| return len; |
| } |
| |
| // Find the longest line in the document. |
| function findMaxLine(cm) { |
| var d = cm.display, doc = cm.doc; |
| d.maxLine = getLine(doc, doc.first); |
| d.maxLineLength = lineLength(d.maxLine); |
| d.maxLineChanged = true; |
| doc.iter(function(line) { |
| var len = lineLength(line); |
| if (len > d.maxLineLength) { |
| d.maxLineLength = len; |
| d.maxLine = line; |
| } |
| }); |
| } |
| |
| // Make sure the gutters options contains the element |
| // "CodeMirror-linenumbers" when the lineNumbers option is true. |
| function setGuttersForLineNumbers(options) { |
| var found = indexOf(options.gutters, "CodeMirror-linenumbers"); |
| if (found == -1 && options.lineNumbers) { |
| options.gutters = options.gutters.concat(["CodeMirror-linenumbers"]); |
| } else if (found > -1 && !options.lineNumbers) { |
| options.gutters = options.gutters.slice(0); |
| options.gutters.splice(found, 1); |
| } |
| } |
| |
| // SCROLLBARS |
| |
| // Prepare DOM reads needed to update the scrollbars. Done in one |
| // shot to minimize update/measure roundtrips. |
| function measureForScrollbars(cm) { |
| var scroll = cm.display.scroller; |
| return { |
| clientHeight: scroll.clientHeight, |
| barHeight: cm.display.scrollbarV.clientHeight, |
| scrollWidth: scroll.scrollWidth, clientWidth: scroll.clientWidth, |
| barWidth: cm.display.scrollbarH.clientWidth, |
| docHeight: Math.round(cm.doc.height + paddingVert(cm.display)) |
| }; |
| } |
| |
| // Re-synchronize the fake scrollbars with the actual size of the |
| // content. |
| function updateScrollbars(cm, measure) { |
| if (!measure) measure = measureForScrollbars(cm); |
| var d = cm.display; |
| var scrollHeight = measure.docHeight + scrollerCutOff; |
| var needsH = measure.scrollWidth > measure.clientWidth; |
| var needsV = scrollHeight > measure.clientHeight; |
| if (needsV) { |
| d.scrollbarV.style.display = "block"; |
| d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0"; |
| // A bug in IE8 can cause this value to be negative, so guard it. |
| d.scrollbarV.firstChild.style.height = |
| Math.max(0, scrollHeight - measure.clientHeight + (measure.barHeight || d.scrollbarV.clientHeight)) + "px"; |
| } else { |
| d.scrollbarV.style.display = ""; |
| d.scrollbarV.firstChild.style.height = "0"; |
| } |
| if (needsH) { |
| d.scrollbarH.style.display = "block"; |
| d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0"; |
| d.scrollbarH.firstChild.style.width = |
| (measure.scrollWidth - measure.clientWidth + (measure.barWidth || d.scrollbarH.clientWidth)) + "px"; |
| } else { |
| d.scrollbarH.style.display = ""; |
| d.scrollbarH.firstChild.style.width = "0"; |
| } |
| if (needsH && needsV) { |
| d.scrollbarFiller.style.display = "block"; |
| d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px"; |
| } else d.scrollbarFiller.style.display = ""; |
| if (needsH && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) { |
| d.gutterFiller.style.display = "block"; |
| d.gutterFiller.style.height = scrollbarWidth(d.measure) + "px"; |
| d.gutterFiller.style.width = d.gutters.offsetWidth + "px"; |
| } else d.gutterFiller.style.display = ""; |
| |
| if (!cm.state.checkedOverlayScrollbar && measure.clientHeight > 0) { |
| if (scrollbarWidth(d.measure) === 0) { |
| var w = mac && !mac_geMountainLion ? "12px" : "18px"; |
| d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = w; |
| var barMouseDown = function(e) { |
| if (e_target(e) != d.scrollbarV && e_target(e) != d.scrollbarH) |
| operation(cm, onMouseDown)(e); |
| }; |
| on(d.scrollbarV, "mousedown", barMouseDown); |
| on(d.scrollbarH, "mousedown", barMouseDown); |
| } |
| cm.state.checkedOverlayScrollbar = true; |
| } |
| } |
| |
| // Compute the lines that are visible in a given viewport (defaults |
| // the the current scroll position). viewPort may contain top, |
| // height, and ensure (see op.scrollToPos) properties. |
| function visibleLines(display, doc, viewPort) { |
| var top = viewPort && viewPort.top != null ? viewPort.top : display.scroller.scrollTop; |
| top = Math.floor(top - paddingTop(display)); |
| var bottom = viewPort && viewPort.bottom != null ? viewPort.bottom : top + display.wrapper.clientHeight; |
| |
| var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom); |
| // Ensure is a {from: {line, ch}, to: {line, ch}} object, and |
| // forces those lines into the viewport (if possible). |
| if (viewPort && viewPort.ensure) { |
| var ensureFrom = viewPort.ensure.from.line, ensureTo = viewPort.ensure.to.line; |
| if (ensureFrom < from) |
| return {from: ensureFrom, |
| to: lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight)}; |
| if (Math.min(ensureTo, doc.lastLine()) >= to) |
| return {from: lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight), |
| to: ensureTo}; |
| } |
| return {from: from, to: to}; |
| } |
| |
| // LINE NUMBERS |
| |
| // Re-align line numbers and gutter marks to compensate for |
| // horizontal scrolling. |
| function alignHorizontally(cm) { |
| var display = cm.display, view = display.view; |
| if (!display.alignWidgets && (!display.gutters.firstChild || !cm.options.fixedGutter)) return; |
| var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.doc.scrollLeft; |
| var gutterW = display.gutters.offsetWidth, left = comp + "px"; |
| for (var i = 0; i < view.length; i++) if (!view[i].hidden) { |
| if (cm.options.fixedGutter && view[i].gutter) |
| view[i].gutter.style.left = left; |
| var align = view[i].alignable; |
| if (align) for (var j = 0; j < align.length; j++) |
| align[j].style.left = left; |
| } |
| if (cm.options.fixedGutter) |
| display.gutters.style.left = (comp + gutterW) + "px"; |
| } |
| |
| // Used to ensure that the line number gutter is still the right |
| // size for the current document size. Returns true when an update |
| // is needed. |
| function maybeUpdateLineNumberWidth(cm) { |
| if (!cm.options.lineNumbers) return false; |
| var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display; |
| if (last.length != display.lineNumChars) { |
| var test = display.measure.appendChild(elt("div", [elt("div", last)], |
| "CodeMirror-linenumber CodeMirror-gutter-elt")); |
| var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW; |
| display.lineGutter.style.width = ""; |
| display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding); |
| display.lineNumWidth = display.lineNumInnerWidth + padding; |
| display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; |
| display.lineGutter.style.width = display.lineNumWidth + "px"; |
| updateGutterSpace(cm); |
| return true; |
| } |
| return false; |
| } |
| |
| function lineNumberFor(options, i) { |
| return String(options.lineNumberFormatter(i + options.firstLineNumber)); |
| } |
| |
| // Computes display.scroller.scrollLeft + display.gutters.offsetWidth, |
| // but using getBoundingClientRect to get a sub-pixel-accurate |
| // result. |
| function compensateForHScroll(display) { |
| return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left; |
| } |
| |
| // DISPLAY DRAWING |
| |
| // Updates the display, selection, and scrollbars, using the |
| // information in display.view to find out which nodes are no longer |
| // up-to-date. Tries to bail out early when no changes are needed, |
| // unless forced is true. |
| // Returns true if an actual update happened, false otherwise. |
| function updateDisplay(cm, viewPort, forced) { |
| var oldFrom = cm.display.viewFrom, oldTo = cm.display.viewTo, updated; |
| var visible = visibleLines(cm.display, cm.doc, viewPort); |
| for (var first = true;; first = false) { |
| var oldWidth = cm.display.scroller.clientWidth; |
| if (!updateDisplayInner(cm, visible, forced)) break; |
| updated = true; |
| |
| // If the max line changed since it was last measured, measure it, |
| // and ensure the document's width matches it. |
| if (cm.display.maxLineChanged && !cm.options.lineWrapping) |
| adjustContentWidth(cm); |
| |
| var barMeasure = measureForScrollbars(cm); |
| updateSelection(cm); |
| setDocumentHeight(cm, barMeasure); |
| updateScrollbars(cm, barMeasure); |
| if (webkit && cm.options.lineWrapping) |
| checkForWebkitWidthBug(cm, barMeasure); // (Issue #2420) |
| if (first && cm.options.lineWrapping && oldWidth != cm.display.scroller.clientWidth) { |
| forced = true; |
| continue; |
| } |
| forced = false; |
| |
| // Clip forced viewport to actual scrollable area. |
| if (viewPort && viewPort.top != null) |
| viewPort = {top: Math.min(barMeasure.docHeight - scrollerCutOff - barMeasure.clientHeight, viewPort.top)}; |
| // Updated line heights might result in the drawn area not |
| // actually covering the viewport. Keep looping until it does. |
| visible = visibleLines(cm.display, cm.doc, viewPort); |
| if (visible.from >= cm.display.viewFrom && visible.to <= cm.display.viewTo) |
| break; |
| } |
| |
| cm.display.updateLineNumbers = null; |
| if (updated) { |
| signalLater(cm, "update", cm); |
| if (cm.display.viewFrom != oldFrom || cm.display.viewTo != oldTo) |
| signalLater(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo); |
| } |
| return updated; |
| } |
| |
| // Does the actual updating of the line display. Bails out |
| // (returning false) when there is nothing to be done and forced is |
| // false. |
| function updateDisplayInner(cm, visible, forced) { |
| var display = cm.display, doc = cm.doc; |
| if (!display.wrapper.offsetWidth) { |
| resetView(cm); |
| return; |
| } |
| |
| // Bail out if the visible area is already rendered and nothing changed. |
| if (!forced && visible.from >= display.viewFrom && visible.to <= display.viewTo && |
| countDirtyView(cm) == 0) |
| return; |
| |
| if (maybeUpdateLineNumberWidth(cm)) |
| resetView(cm); |
| var dims = getDimensions(cm); |
| |
| // Compute a suitable new viewport (from & to) |
| var end = doc.first + doc.size; |
| var from = Math.max(visible.from - cm.options.viewportMargin, doc.first); |
| var to = Math.min(end, visible.to + cm.options.viewportMargin); |
| if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom); |
| if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo); |
| if (sawCollapsedSpans) { |
| from = visualLineNo(cm.doc, from); |
| to = visualLineEndNo(cm.doc, to); |
| } |
| |
| var different = from != display.viewFrom || to != display.viewTo || |
| display.lastSizeC != display.wrapper.clientHeight; |
| adjustView(cm, from, to); |
| |
| display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom)); |
| // Position the mover div to align with the current scroll position |
| cm.display.mover.style.top = display.viewOffset + "px"; |
| |
| var toUpdate = countDirtyView(cm); |
| if (!different && toUpdate == 0 && !forced) return; |
| |
| // For big changes, we hide the enclosing element during the |
| // update, since that speeds up the operations on most browsers. |
| var focused = activeElt(); |
| if (toUpdate > 4) display.lineDiv.style.display = "none"; |
| patchDisplay(cm, display.updateLineNumbers, dims); |
| if (toUpdate > 4) display.lineDiv.style.display = ""; |
| // There might have been a widget with a focused element that got |
| // hidden or updated, if so re-focus it. |
| if (focused && activeElt() != focused && focused.offsetHeight) focused.focus(); |
| |
| // Prevent selection and cursors from interfering with the scroll |
| // width. |
| removeChildren(display.cursorDiv); |
| removeChildren(display.selectionDiv); |
| |
| if (different) { |
| display.lastSizeC = display.wrapper.clientHeight; |
| startWorker(cm, 400); |
| } |
| |
| updateHeightsInViewport(cm); |
| |
| return true; |
| } |
| |
| function adjustContentWidth(cm) { |
| var display = cm.display; |
| var width = measureChar(cm, display.maxLine, display.maxLine.text.length).left; |
| display.maxLineChanged = false; |
| var minWidth = Math.max(0, width + 3); |
| var maxScrollLeft = Math.max(0, display.sizer.offsetLeft + minWidth + scrollerCutOff - display.scroller.clientWidth); |
| display.sizer.style.minWidth = minWidth + "px"; |
| if (maxScrollLeft < cm.doc.scrollLeft) |
| setScrollLeft(cm, Math.min(display.scroller.scrollLeft, maxScrollLeft), true); |
| } |
| |
| function setDocumentHeight(cm, measure) { |
| cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = measure.docHeight + "px"; |
| cm.display.gutters.style.height = Math.max(measure.docHeight, measure.clientHeight - scrollerCutOff) + "px"; |
| } |
| |
| |
| function checkForWebkitWidthBug(cm, measure) { |
| // Work around Webkit bug where it sometimes reserves space for a |
| // non-existing phantom scrollbar in the scroller (Issue #2420) |
| if (cm.display.sizer.offsetWidth + cm.display.gutters.offsetWidth < cm.display.scroller.clientWidth - 1) { |
| cm.display.sizer.style.minHeight = cm.display.heightForcer.style.top = "0px"; |
| cm.display.gutters.style.height = measure.docHeight + "px"; |
| } |
| } |
| |
| // Read the actual heights of the rendered lines, and update their |
| // stored heights to match. |
| function updateHeightsInViewport(cm) { |
| var display = cm.display; |
| var prevBottom = display.lineDiv.offsetTop; |
| for (var i = 0; i < display.view.length; i++) { |
| var cur = display.view[i], height; |
| if (cur.hidden) continue; |
| if (ie_upto7) { |
| var bot = cur.node.offsetTop + cur.node.offsetHeight; |
| height = bot - prevBottom; |
| prevBottom = bot; |
| } else { |
| var box = cur.node.getBoundingClientRect(); |
| height = box.bottom - box.top; |
| } |
| var diff = cur.line.height - height; |
| if (height < 2) height = textHeight(display); |
| if (diff > .001 || diff < -.001) { |
| updateLineHeight(cur.line, height); |
| updateWidgetHeight(cur.line); |
| if (cur.rest) for (var j = 0; j < cur.rest.length; j++) |
| updateWidgetHeight(cur.rest[j]); |
| } |
| } |
| } |
| |
| // Read and store the height of line widgets associated with the |
| // given line. |
| function updateWidgetHeight(line) { |
| if (line.widgets) for (var i = 0; i < line.widgets.length; ++i) |
| line.widgets[i].height = line.widgets[i].node.offsetHeight; |
| } |
| |
| // Do a bulk-read of the DOM positions and sizes needed to draw the |
| // view, so that we don't interleave reading and writing to the DOM. |
| function getDimensions(cm) { |
| var d = cm.display, left = {}, width = {}; |
| for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) { |
| left[cm.options.gutters[i]] = n.offsetLeft; |
| width[cm.options.gutters[i]] = n.offsetWidth; |
| } |
| return {fixedPos: compensateForHScroll(d), |
| gutterTotalWidth: d.gutters.offsetWidth, |
| gutterLeft: left, |
| gutterWidth: width, |
| wrapperWidth: d.wrapper.clientWidth}; |
| } |
| |
| // Sync the actual display DOM structure with display.view, removing |
| // nodes for lines that are no longer in view, and creating the ones |
| // that are not there yet, and updating the ones that are out of |
| // date. |
| function patchDisplay(cm, updateNumbersFrom, dims) { |
| var display = cm.display, lineNumbers = cm.options.lineNumbers; |
| var container = display.lineDiv, cur = container.firstChild; |
| |
| function rm(node) { |
| var next = node.nextSibling; |
| // Works around a throw-scroll bug in OS X Webkit |
| if (webkit && mac && cm.display.currentWheelTarget == node) |
| node.style.display = "none"; |
| else |
| node.parentNode.removeChild(node); |
| return next; |
| } |
| |
| var view = display.view, lineN = display.viewFrom; |
| // Loop over the elements in the view, syncing cur (the DOM nodes |
| // in display.lineDiv) with the view as we go. |
| for (var i = 0; i < view.length; i++) { |
| var lineView = view[i]; |
| if (lineView.hidden) { |
| } else if (!lineView.node) { // Not drawn yet |
| var node = buildLineElement(cm, lineView, lineN, dims); |
| container.insertBefore(node, cur); |
| } else { // Already drawn |
| while (cur != lineView.node) cur = rm(cur); |
| var updateNumber = lineNumbers && updateNumbersFrom != null && |
| updateNumbersFrom <= lineN && lineView.lineNumber; |
| if (lineView.changes) { |
| if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false; |
| updateLineForChanges(cm, lineView, lineN, dims); |
| } |
| if (updateNumber) { |
| removeChildren(lineView.lineNumber); |
| lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN))); |
| } |
| cur = lineView.node.nextSibling; |
| } |
| lineN += lineView.size; |
| } |
| while (cur) cur = rm(cur); |
| } |
| |
| // When an aspect of a line changes, a string is added to |
| // lineView.changes. This updates the relevant part of the line's |
| // DOM structure. |
| function updateLineForChanges(cm, lineView, lineN, dims) { |
| for (var j = 0; j < lineView.changes.length; j++) { |
| var type = lineView.changes[j]; |
| if (type == "text") updateLineText(cm, lineView); |
| else if (type == "gutter") updateLineGutter(cm, lineView, lineN, dims); |
| else if (type == "class") updateLineClasses(lineView); |
| else if (type == "widget") updateLineWidgets(lineView, dims); |
| } |
| lineView.changes = null; |
| } |
| |
| // Lines with gutter elements, widgets or a background class need to |
| // be wrapped, and have the extra elements added to the wrapper div |
| function ensureLineWrapped(lineView) { |
| if (lineView.node == lineView.text) { |
| lineView.node = elt("div", null, null, "position: relative"); |
| if (lineView.text.parentNode) |
| lineView.text.parentNode.replaceChild(lineView.node, lineView.text); |
| lineView.node.appendChild(lineView.text); |
| if (ie_upto7) lineView.node.style.zIndex = 2; |
| } |
| return lineView.node; |
| } |
| |
| function updateLineBackground(lineView) { |
| var cls = lineView.bgClass ? lineView.bgClass + " " + (lineView.line.bgClass || "") : lineView.line.bgClass; |
| if (cls) cls += " CodeMirror-linebackground"; |
| if (lineView.background) { |
| if (cls) lineView.background.className = cls; |
| else { lineView.background.parentNode.removeChild(lineView.background); lineView.background = null; } |
| } else if (cls) { |
| var wrap = ensureLineWrapped(lineView); |
| lineView.background = wrap.insertBefore(elt("div", null, cls), wrap.firstChild); |
| } |
| } |
| |
| // Wrapper around buildLineContent which will reuse the structure |
| // in display.externalMeasured when possible. |
| function getLineContent(cm, lineView) { |
| var ext = cm.display.externalMeasured; |
| if (ext && ext.line == lineView.line) { |
| cm.display.externalMeasured = null; |
| lineView.measure = ext.measure; |
| return ext.built; |
| } |
| return buildLineContent(cm, lineView); |
| } |
| |
| // Redraw the line's text. Interacts with the background and text |
| // classes because the mode may output tokens that influence these |
| // classes. |
| function updateLineText(cm, lineView) { |
| var cls = lineView.text.className; |
| var built = getLineContent(cm, lineView); |
| if (lineView.text == lineView.node) lineView.node = built.pre; |
| lineView.text.parentNode.replaceChild(built.pre, lineView.text); |
| lineView.text = built.pre; |
| if (built.bgClass != lineView.bgClass || built.textClass != lineView.textClass) { |
| lineView.bgClass = built.bgClass; |
| lineView.textClass = built.textClass; |
| updateLineClasses(lineView); |
| } else if (cls) { |
| lineView.text.className = cls; |
| } |
| } |
| |
| function updateLineClasses(lineView) { |
| updateLineBackground(lineView); |
| if (lineView.line.wrapClass) |
| ensureLineWrapped(lineView).className = lineView.line.wrapClass; |
| else if (lineView.node != lineView.text) |
| lineView.node.className = ""; |
| var textClass = lineView.textClass ? lineView.textClass + " " + (lineView.line.textClass || "") : lineView.line.textClass; |
| lineView.text.className = textClass || ""; |
| } |
| |
| function updateLineGutter(cm, lineView, lineN, dims) { |
| if (lineView.gutter) { |
| lineView.node.removeChild(lineView.gutter); |
| lineView.gutter = null; |
| } |
| var markers = lineView.line.gutterMarkers; |
| if (cm.options.lineNumbers || markers) { |
| var wrap = ensureLineWrapped(lineView); |
| var gutterWrap = lineView.gutter = |
| wrap.insertBefore(elt("div", null, "CodeMirror-gutter-wrapper", "position: absolute; left: " + |
| (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"), |
| lineView.text); |
| if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"])) |
| lineView.lineNumber = gutterWrap.appendChild( |
| elt("div", lineNumberFor(cm.options, lineN), |
| "CodeMirror-linenumber CodeMirror-gutter-elt", |
| "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: " |
| + cm.display.lineNumInnerWidth + "px")); |
| if (markers) for (var k = 0; k < cm.options.gutters.length; ++k) { |
| var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id]; |
| if (found) |
| gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " + |
| dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px")); |
| } |
| } |
| } |
| |
| function updateLineWidgets(lineView, dims) { |
| if (lineView.alignable) lineView.alignable = null; |
| for (var node = lineView.node.firstChild, next; node; node = next) { |
| var next = node.nextSibling; |
| if (node.className == "CodeMirror-linewidget") |
| lineView.node.removeChild(node); |
| } |
| insertLineWidgets(lineView, dims); |
| } |
| |
| // Build a line's DOM representation from scratch |
| function buildLineElement(cm, lineView, lineN, dims) { |
| var built = getLineContent(cm, lineView); |
| lineView.text = lineView.node = built.pre; |
| if (built.bgClass) lineView.bgClass = built.bgClass; |
| if (built.textClass) lineView.textClass = built.textClass; |
| |
| updateLineClasses(lineView); |
| updateLineGutter(cm, lineView, lineN, dims); |
| insertLineWidgets(lineView, dims); |
| return lineView.node; |
| } |
| |
| // A lineView may contain multiple logical lines (when merged by |
| // collapsed spans). The widgets for all of them need to be drawn. |
| function insertLineWidgets(lineView, dims) { |
| insertLineWidgetsFor(lineView.line, lineView, dims, true); |
| if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) |
| insertLineWidgetsFor(lineView.rest[i], lineView, dims, false); |
| } |
| |
| function insertLineWidgetsFor(line, lineView, dims, allowAbove) { |
| if (!line.widgets) return; |
| var wrap = ensureLineWrapped(lineView); |
| for (var i = 0, ws = line.widgets; i < ws.length; ++i) { |
| var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget"); |
| if (!widget.handleMouseEvents) node.ignoreEvents = true; |
| positionLineWidget(widget, node, lineView, dims); |
| if (allowAbove && widget.above) |
| wrap.insertBefore(node, lineView.gutter || lineView.text); |
| else |
| wrap.appendChild(node); |
| signalLater(widget, "redraw"); |
| } |
| } |
| |
| function positionLineWidget(widget, node, lineView, dims) { |
| if (widget.noHScroll) { |
| (lineView.alignable || (lineView.alignable = [])).push(node); |
| var width = dims.wrapperWidth; |
| node.style.left = dims.fixedPos + "px"; |
| if (!widget.coverGutter) { |
| width -= dims.gutterTotalWidth; |
| node.style.paddingLeft = dims.gutterTotalWidth + "px"; |
| } |
| node.style.width = width + "px"; |
| } |
| if (widget.coverGutter) { |
| node.style.zIndex = 5; |
| node.style.position = "relative"; |
| if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px"; |
| } |
| } |
| |
| // POSITION OBJECT |
| |
| // A Pos instance represents a position within the text. |
| var Pos = CodeMirror.Pos = function(line, ch) { |
| if (!(this instanceof Pos)) return new Pos(line, ch); |
| this.line = line; this.ch = ch; |
| }; |
| |
| // Compare two positions, return 0 if they are the same, a negative |
| // number when a is less, and a positive number otherwise. |
| var cmp = CodeMirror.cmpPos = function(a, b) { return a.line - b.line || a.ch - b.ch; }; |
| |
| function copyPos(x) {return Pos(x.line, x.ch);} |
| function maxPos(a, b) { return cmp(a, b) < 0 ? b : a; } |
| function minPos(a, b) { return cmp(a, b) < 0 ? a : b; } |
| |
| // SELECTION / CURSOR |
| |
| // Selection objects are immutable. A new one is created every time |
| // the selection changes. A selection is one or more non-overlapping |
| // (and non-touching) ranges, sorted, and an integer that indicates |
| // which one is the primary selection (the one that's scrolled into |
| // view, that getCursor returns, etc). |
| function Selection(ranges, primIndex) { |
| this.ranges = ranges; |
| this.primIndex = primIndex; |
| } |
| |
| Selection.prototype = { |
| primary: function() { return this.ranges[this.primIndex]; }, |
| equals: function(other) { |
| if (other == this) return true; |
| if (other.primIndex != this.primIndex || other.ranges.length != this.ranges.length) return false; |
| for (var i = 0; i < this.ranges.length; i++) { |
| var here = this.ranges[i], there = other.ranges[i]; |
| if (cmp(here.anchor, there.anchor) != 0 || cmp(here.head, there.head) != 0) return false; |
| } |
| return true; |
| }, |
| deepCopy: function() { |
| for (var out = [], i = 0; i < this.ranges.length; i++) |
| out[i] = new Range(copyPos(this.ranges[i].anchor), copyPos(this.ranges[i].head)); |
| return new Selection(out, this.primIndex); |
| }, |
| somethingSelected: function() { |
| for (var i = 0; i < this.ranges.length; i++) |
| if (!this.ranges[i].empty()) return true; |
| return false; |
| }, |
| contains: function(pos, end) { |
| if (!end) end = pos; |
| for (var i = 0; i < this.ranges.length; i++) { |
| var range = this.ranges[i]; |
| if (cmp(end, range.from()) >= 0 && cmp(pos, range.to()) <= 0) |
| return i; |
| } |
| return -1; |
| } |
| }; |
| |
| function Range(anchor, head) { |
| this.anchor = anchor; this.head = head; |
| } |
| |
| Range.prototype = { |
| from: function() { return minPos(this.anchor, this.head); }, |
| to: function() { return maxPos(this.anchor, this.head); }, |
| empty: function() { |
| return this.head.line == this.anchor.line && this.head.ch == this.anchor.ch; |
| } |
| }; |
| |
| // Take an unsorted, potentially overlapping set of ranges, and |
| // build a selection out of it. 'Consumes' ranges array (modifying |
| // it). |
| function normalizeSelection(ranges, primIndex) { |
| var prim = ranges[primIndex]; |
| ranges.sort(function(a, b) { return cmp(a.from(), b.from()); }); |
| primIndex = indexOf(ranges, prim); |
| for (var i = 1; i < ranges.length; i++) { |
| var cur = ranges[i], prev = ranges[i - 1]; |
| if (cmp(prev.to(), cur.from()) >= 0) { |
| var from = minPos(prev.from(), cur.from()), to = maxPos(prev.to(), cur.to()); |
| var inv = prev.empty() ? cur.from() == cur.head : prev.from() == prev.head; |
| if (i <= primIndex) --primIndex; |
| ranges.splice(--i, 2, new Range(inv ? to : from, inv ? from : to)); |
| } |
| } |
| return new Selection(ranges, primIndex); |
| } |
| |
| function simpleSelection(anchor, head) { |
| return new Selection([new Range(anchor, head || anchor)], 0); |
| } |
| |
| // Most of the external API clips given positions to make sure they |
| // actually exist within the document. |
| function clipLine(doc, n) {return Math.max(doc.first, Math.min(n, doc.first + doc.size - 1));} |
| function clipPos(doc, pos) { |
| if (pos.line < doc.first) return Pos(doc.first, 0); |
| var last = doc.first + doc.size - 1; |
| if (pos.line > last) return Pos(last, getLine(doc, last).text.length); |
| return clipToLen(pos, getLine(doc, pos.line).text.length); |
| } |
| function clipToLen(pos, linelen) { |
| var ch = pos.ch; |
| if (ch == null || ch > linelen) return Pos(pos.line, linelen); |
| else if (ch < 0) return Pos(pos.line, 0); |
| else return pos; |
| } |
| function isLine(doc, l) {return l >= doc.first && l < doc.first + doc.size;} |
| function clipPosArray(doc, array) { |
| for (var out = [], i = 0; i < array.length; i++) out[i] = clipPos(doc, array[i]); |
| return out; |
| } |
| |
| // SELECTION UPDATES |
| |
| // The 'scroll' parameter given to many of these indicated whether |
| // the new cursor position should be scrolled into view after |
| // modifying the selection. |
| |
| // If shift is held or the extend flag is set, extends a range to |
| // include a given position (and optionally a second position). |
| // Otherwise, simply returns the range between the given positions. |
| // Used for cursor motion and such. |
| function extendRange(doc, range, head, other) { |
| if (doc.cm && doc.cm.display.shift || doc.extend) { |
| var anchor = range.anchor; |
| if (other) { |
| var posBefore = cmp(head, anchor) < 0; |
| if (posBefore != (cmp(other, anchor) < 0)) { |
| anchor = head; |
| head = other; |
| } else if (posBefore != (cmp(head, other) < 0)) { |
| head = other; |
| } |
| } |
| return new Range(anchor, head); |
| } else { |
| return new Range(other || head, head); |
| } |
| } |
| |
| // Extend the primary selection range, discard the rest. |
| function extendSelection(doc, head, other, options) { |
| setSelection(doc, new Selection([extendRange(doc, doc.sel.primary(), head, other)], 0), options); |
| } |
| |
| // Extend all selections (pos is an array of selections with length |
| // equal the number of selections) |
| function extendSelections(doc, heads, options) { |
| for (var out = [], i = 0; i < doc.sel.ranges.length; i++) |
| out[i] = extendRange(doc, doc.sel.ranges[i], heads[i], null); |
| var newSel = normalizeSelection(out, doc.sel.primIndex); |
| setSelection(doc, newSel, options); |
| } |
| |
| // Updates a single range in the selection. |
| function replaceOneSelection(doc, i, range, options) { |
| var ranges = doc.sel.ranges.slice(0); |
| ranges[i] = range; |
| setSelection(doc, normalizeSelection(ranges, doc.sel.primIndex), options); |
| } |
| |
| // Reset the selection to a single range. |
| function setSimpleSelection(doc, anchor, head, options) { |
| setSelection(doc, simpleSelection(anchor, head), options); |
| } |
| |
| // Give beforeSelectionChange handlers a change to influence a |
| // selection update. |
| function filterSelectionChange(doc, sel) { |
| var obj = { |
| ranges: sel.ranges, |
| update: function(ranges) { |
| this.ranges = []; |
| for (var i = 0; i < ranges.length; i++) |
| this.ranges[i] = new Range(clipPos(doc, ranges[i].anchor), |
| clipPos(doc, ranges[i].head)); |
| } |
| }; |
| signal(doc, "beforeSelectionChange", doc, obj); |
| if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj); |
| if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1); |
| else return sel; |
| } |
| |
| function setSelectionReplaceHistory(doc, sel, options) { |
| var done = doc.history.done, last = lst(done); |
| if (last && last.ranges) { |
| done[done.length - 1] = sel; |
| setSelectionNoUndo(doc, sel, options); |
| } else { |
| setSelection(doc, sel, options); |
| } |
| } |
| |
| // Set a new selection. |
| function setSelection(doc, sel, options) { |
| setSelectionNoUndo(doc, sel, options); |
| addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options); |
| } |
| |
| function setSelectionNoUndo(doc, sel, options) { |
| if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) |
| sel = filterSelectionChange(doc, sel); |
| |
| var bias = cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1; |
| setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true)); |
| |
| if (!(options && options.scroll === false) && doc.cm) |
| ensureCursorVisible(doc.cm); |
| } |
| |
| function setSelectionInner(doc, sel) { |
| if (sel.equals(doc.sel)) return; |
| |
| doc.sel = sel; |
| |
| if (doc.cm) { |
| doc.cm.curOp.updateInput = doc.cm.curOp.selectionChanged = true; |
| signalCursorActivity(doc.cm); |
| } |
| signalLater(doc, "cursorActivity", doc); |
| } |
| |
| // Verify that the selection does not partially select any atomic |
| // marked ranges. |
| function reCheckSelection(doc) { |
| setSelectionInner(doc, skipAtomicInSelection(doc, doc.sel, null, false), sel_dontScroll); |
| } |
| |
| // Return a selection that does not partially select any atomic |
| // ranges. |
| function skipAtomicInSelection(doc, sel, bias, mayClear) { |
| var out; |
| for (var i = 0; i < sel.ranges.length; i++) { |
| var range = sel.ranges[i]; |
| var newAnchor = skipAtomic(doc, range.anchor, bias, mayClear); |
| var newHead = skipAtomic(doc, range.head, bias, mayClear); |
| if (out || newAnchor != range.anchor || newHead != range.head) { |
| if (!out) out = sel.ranges.slice(0, i); |
| out[i] = new Range(newAnchor, newHead); |
| } |
| } |
| return out ? normalizeSelection(out, sel.primIndex) : sel; |
| } |
| |
| // Ensure a given position is not inside an atomic range. |
| function skipAtomic(doc, pos, bias, mayClear) { |
| var flipped = false, curPos = pos; |
| var dir = bias || 1; |
| doc.cantEdit = false; |
| search: for (;;) { |
| var line = getLine(doc, curPos.line); |
| if (line.markedSpans) { |
| for (var i = 0; i < line.markedSpans.length; ++i) { |
| var sp = line.markedSpans[i], m = sp.marker; |
| if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) && |
| (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) { |
| if (mayClear) { |
| signal(m, "beforeCursorEnter"); |
| if (m.explicitlyCleared) { |
| if (!line.markedSpans) break; |
| else {--i; continue;} |
| } |
| } |
| if (!m.atomic) continue; |
| var newPos = m.find(dir < 0 ? -1 : 1); |
| if (cmp(newPos, curPos) == 0) { |
| newPos.ch += dir; |
| if (newPos.ch < 0) { |
| if (newPos.line > doc.first) newPos = clipPos(doc, Pos(newPos.line - 1)); |
| else newPos = null; |
| } else if (newPos.ch > line.text.length) { |
| if (newPos.line < doc.first + doc.size - 1) newPos = Pos(newPos.line + 1, 0); |
| else newPos = null; |
| } |
| if (!newPos) { |
| if (flipped) { |
| // Driven in a corner -- no valid cursor position found at all |
| // -- try again *with* clearing, if we didn't already |
| if (!mayClear) return skipAtomic(doc, pos, bias, true); |
| // Otherwise, turn off editing until further notice, and return the start of the doc |
| doc.cantEdit = true; |
| return Pos(doc.first, 0); |
| } |
| flipped = true; newPos = pos; dir = -dir; |
| } |
| } |
| curPos = newPos; |
| continue search; |
| } |
| } |
| } |
| return curPos; |
| } |
| } |
| |
| // SELECTION DRAWING |
| |
| // Redraw the selection and/or cursor |
| function updateSelection(cm) { |
| var display = cm.display, doc = cm.doc; |
| var curFragment = document.createDocumentFragment(); |
| var selFragment = document.createDocumentFragment(); |
| |
| for (var i = 0; i < doc.sel.ranges.length; i++) { |
| var range = doc.sel.ranges[i]; |
| var collapsed = range.empty(); |
| if (collapsed || cm.options.showCursorWhenSelecting) |
| drawSelectionCursor(cm, range, curFragment); |
| if (!collapsed) |
| drawSelectionRange(cm, range, selFragment); |
| } |
| |
| // Move the hidden textarea near the cursor to prevent scrolling artifacts |
| if (cm.options.moveInputWithCursor) { |
| var headPos = cursorCoords(cm, doc.sel.primary().head, "div"); |
| var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect(); |
| var top = Math.max(0, Math.min(display.wrapper.clientHeight - 10, |
| headPos.top + lineOff.top - wrapOff.top)); |
| var left = Math.max(0, Math.min(display.wrapper.clientWidth - 10, |
| headPos.left + lineOff.left - wrapOff.left)); |
| display.inputDiv.style.top = top + "px"; |
| display.inputDiv.style.left = left + "px"; |
| } |
| |
| removeChildrenAndAdd(display.cursorDiv, curFragment); |
| removeChildrenAndAdd(display.selectionDiv, selFragment); |
| } |
| |
| // Draws a cursor for the given range |
| function drawSelectionCursor(cm, range, output) { |
| var pos = cursorCoords(cm, range.head, "div"); |
| |
| var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor")); |
| cursor.style.left = pos.left + "px"; |
| cursor.style.top = pos.top + "px"; |
| cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"; |
| |
| if (pos.other) { |
| // Secondary cursor, shown when on a 'jump' in bi-directional text |
| var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor")); |
| otherCursor.style.display = ""; |
| otherCursor.style.left = pos.other.left + "px"; |
| otherCursor.style.top = pos.other.top + "px"; |
| otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"; |
| } |
| } |
| |
| // Draws the given range as a highlighted selection |
| function drawSelectionRange(cm, range, output) { |
| var display = cm.display, doc = cm.doc; |
| var fragment = document.createDocumentFragment(); |
| var padding = paddingH(cm.display), leftSide = padding.left, rightSide = display.lineSpace.offsetWidth - padding.right; |
| |
| function add(left, top, width, bottom) { |
| if (top < 0) top = 0; |
| top = Math.round(top); |
| bottom = Math.round(bottom); |
| fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left + |
| "px; top: " + top + "px; width: " + (width == null ? rightSide - left : width) + |
| "px; height: " + (bottom - top) + "px")); |
| } |
| |
| function drawForLine(line, fromArg, toArg) { |
| var lineObj = getLine(doc, line); |
| var lineLen = lineObj.text.length; |
| var start, end; |
| function coords(ch, bias) { |
| return charCoords(cm, Pos(line, ch), "div", lineObj, bias); |
| } |
| |
| iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) { |
| var leftPos = coords(from, "left"), rightPos, left, right; |
| if (from == to) { |
| rightPos = leftPos; |
| left = right = leftPos.left; |
| } else { |
| rightPos = coords(to - 1, "right"); |
| if (dir == "rtl") { var tmp = leftPos; leftPos = rightPos; rightPos = tmp; } |
| left = leftPos.left; |
| right = rightPos.right; |
| } |
| if (fromArg == null && from == 0) left = leftSide; |
| if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part |
| add(left, leftPos.top, null, leftPos.bottom); |
| left = leftSide; |
| if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top); |
| } |
| if (toArg == null && to == lineLen) right = rightSide; |
| if (!start || leftPos.top < start.top || leftPos.top == start.top && leftPos.left < start.left) |
| start = leftPos; |
| if (!end || rightPos.bottom > end.bottom || rightPos.bottom == end.bottom && rightPos.right > end.right) |
| end = rightPos; |
| if (left < leftSide + 1) left = leftSide; |
| add(left, rightPos.top, right - left, rightPos.bottom); |
| }); |
| return {start: start, end: end}; |
| } |
| |
| var sFrom = range.from(), sTo = range.to(); |
| if (sFrom.line == sTo.line) { |
| drawForLine(sFrom.line, sFrom.ch, sTo.ch); |
| } else { |
| var fromLine = getLine(doc, sFrom.line), toLine = getLine(doc, sTo.line); |
| var singleVLine = visualLine(fromLine) == visualLine(toLine); |
| var leftEnd = drawForLine(sFrom.line, sFrom.ch, singleVLine ? fromLine.text.length + 1 : null).end; |
| var rightStart = drawForLine(sTo.line, singleVLine ? 0 : null, sTo.ch).start; |
| if (singleVLine) { |
| if (leftEnd.top < rightStart.top - 2) { |
| add(leftEnd.right, leftEnd.top, null, leftEnd.bottom); |
| add(leftSide, rightStart.top, rightStart.left, rightStart.bottom); |
| } else { |
| add(leftEnd.right, leftEnd.top, rightStart.left - leftEnd.right, leftEnd.bottom); |
| } |
| } |
| if (leftEnd.bottom < rightStart.top) |
| add(leftSide, leftEnd.bottom, null, rightStart.top); |
| } |
| |
| output.appendChild(fragment); |
| } |
| |
| // Cursor-blinking |
| function restartBlink(cm) { |
| if (!cm.state.focused) return; |
| var display = cm.display; |
| clearInterval(display.blinker); |
| var on = true; |
| display.cursorDiv.style.visibility = ""; |
| if (cm.options.cursorBlinkRate > 0) |
| display.blinker = setInterval(function() { |
| display.cursorDiv.style.visibility = (on = !on) ? "" : "hidden"; |
| }, cm.options.cursorBlinkRate); |
| } |
| |
| // HIGHLIGHT WORKER |
| |
| function startWorker(cm, time) { |
| if (cm.doc.mode.startState && cm.doc.frontier < cm.display.viewTo) |
| cm.state.highlight.set(time, bind(highlightWorker, cm)); |
| } |
| |
| function highlightWorker(cm) { |
| var doc = cm.doc; |
| if (doc.frontier < doc.first) doc.frontier = doc.first; |
| if (doc.frontier >= cm.display.viewTo) return; |
| var end = +new Date + cm.options.workTime; |
| var state = copyState(doc.mode, getStateBefore(cm, doc.frontier)); |
| |
| runInOp(cm, function() { |
| doc.iter(doc.frontier, Math.min(doc.first + doc.size, cm.display.viewTo + 500), function(line) { |
| if (doc.frontier >= cm.display.viewFrom) { // Visible |
| var oldStyles = line.styles; |
| var highlighted = highlightLine(cm, line, state, true); |
| line.styles = highlighted.styles; |
| if (highlighted.classes) line.styleClasses = highlighted.classes; |
| else if (line.styleClasses) line.styleClasses = null; |
| var ischange = !oldStyles || oldStyles.length != line.styles.length; |
| for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i]; |
| if (ischange) regLineChange(cm, doc.frontier, "text"); |
| line.stateAfter = copyState(doc.mode, state); |
| } else { |
| processLine(cm, line.text, state); |
| line.stateAfter = doc.frontier % 5 == 0 ? copyState(doc.mode, state) : null; |
| } |
| ++doc.frontier; |
| if (+new Date > end) { |
| startWorker(cm, cm.options.workDelay); |
| return true; |
| } |
| }); |
| }); |
| } |
| |
| // Finds the line to start with when starting a parse. Tries to |
| // find a line with a stateAfter, so that it can start with a |
| // valid state. If that fails, it returns the line with the |
| // smallest indentation, which tends to need the least context to |
| // parse correctly. |
| function findStartLine(cm, n, precise) { |
| var minindent, minline, doc = cm.doc; |
| var lim = precise ? -1 : n - (cm.doc.mode.innerMode ? 1000 : 100); |
| for (var search = n; search > lim; --search) { |
| if (search <= doc.first) return doc.first; |
| var line = getLine(doc, search - 1); |
| if (line.stateAfter && (!precise || search <= doc.frontier)) return search; |
| var indented = countColumn(line.text, null, cm.options.tabSize); |
| if (minline == null || minindent > indented) { |
| minline = search - 1; |
| minindent = indented; |
| } |
| } |
| return minline; |
| } |
| |
| function getStateBefore(cm, n, precise) { |
| var doc = cm.doc, display = cm.display; |
| if (!doc.mode.startState) return true; |
| var pos = findStartLine(cm, n, precise), state = pos > doc.first && getLine(doc, pos-1).stateAfter; |
| if (!state) state = startState(doc.mode); |
| else state = copyState(doc.mode, state); |
| doc.iter(pos, n, function(line) { |
| processLine(cm, line.text, state); |
| var save = pos == n - 1 || pos % 5 == 0 || pos >= display.viewFrom && pos < display.viewTo; |
| line.stateAfter = save ? copyState(doc.mode, state) : null; |
| ++pos; |
| }); |
| if (precise) doc.frontier = pos; |
| return state; |
| } |
| |
| // POSITION MEASUREMENT |
| |
| function paddingTop(display) {return display.lineSpace.offsetTop;} |
| function paddingVert(display) {return display.mover.offsetHeight - display.lineSpace.offsetHeight;} |
| function paddingH(display) { |
| if (display.cachedPaddingH) return display.cachedPaddingH; |
| var e = removeChildrenAndAdd(display.measure, elt("pre", "x")); |
| var style = window.getComputedStyle ? window.getComputedStyle(e) : e.currentStyle; |
| var data = {left: parseInt(style.paddingLeft), right: parseInt(style.paddingRight)}; |
| if (!isNaN(data.left) && !isNaN(data.right)) display.cachedPaddingH = data; |
| return data; |
| } |
| |
| // Ensure the lineView.wrapping.heights array is populated. This is |
| // an array of bottom offsets for the lines that make up a drawn |
| // line. When lineWrapping is on, there might be more than one |
| // height. |
| function ensureLineHeights(cm, lineView, rect) { |
| var wrapping = cm.options.lineWrapping; |
| var curWidth = wrapping && cm.display.scroller.clientWidth; |
| if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) { |
| var heights = lineView.measure.heights = []; |
| if (wrapping) { |
| lineView.measure.width = curWidth; |
| var rects = lineView.text.firstChild.getClientRects(); |
| for (var i = 0; i < rects.length - 1; i++) { |
| var cur = rects[i], next = rects[i + 1]; |
| if (Math.abs(cur.bottom - next.bottom) > 2) |
| heights.push((cur.bottom + next.top) / 2 - rect.top); |
| } |
| } |
| heights.push(rect.bottom - rect.top); |
| } |
| } |
| |
| // Find a line map (mapping character offsets to text nodes) and a |
| // measurement cache for the given line number. (A line view might |
| // contain multiple lines when collapsed ranges are present.) |
| function mapFromLineView(lineView, line, lineN) { |
| if (lineView.line == line) |
| return {map: lineView.measure.map, cache: lineView.measure.cache}; |
| for (var i = 0; i < lineView.rest.length; i++) |
| if (lineView.rest[i] == line) |
| return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]}; |
| for (var i = 0; i < lineView.rest.length; i++) |
| if (lineNo(lineView.rest[i]) > lineN) |
| return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i], before: true}; |
| } |
| |
| // Render a line into the hidden node display.externalMeasured. Used |
| // when measurement is needed for a line that's not in the viewport. |
| function updateExternalMeasurement(cm, line) { |
| line = visualLine(line); |
| var lineN = lineNo(line); |
| var view = cm.display.externalMeasured = new LineView(cm.doc, line, lineN); |
| view.lineN = lineN; |
| var built = view.built = buildLineContent(cm, view); |
| view.text = built.pre; |
| removeChildrenAndAdd(cm.display.lineMeasure, built.pre); |
| return view; |
| } |
| |
| // Get a {top, bottom, left, right} box (in line-local coordinates) |
| // for a given character. |
| function measureChar(cm, line, ch, bias) { |
| return measureCharPrepared(cm, prepareMeasureForLine(cm, line), ch, bias); |
| } |
| |
| // Find a line view that corresponds to the given line number. |
| function findViewForLine(cm, lineN) { |
| if (lineN >= cm.display.viewFrom && lineN < cm.display.viewTo) |
| return cm.display.view[findViewIndex(cm, lineN)]; |
| var ext = cm.display.externalMeasured; |
| if (ext && lineN >= ext.lineN && lineN < ext.lineN + ext.size) |
| return ext; |
| } |
| |
| // Measurement can be split in two steps, the set-up work that |
| // applies to the whole line, and the measurement of the actual |
| // character. Functions like coordsChar, that need to do a lot of |
| // measurements in a row, can thus ensure that the set-up work is |
| // only done once. |
| function prepareMeasureForLine(cm, line) { |
| var lineN = lineNo(line); |
| var view = findViewForLine(cm, lineN); |
| if (view && !view.text) |
| view = null; |
| else if (view && view.changes) |
| updateLineForChanges(cm, view, lineN, getDimensions(cm)); |
| if (!view) |
| view = updateExternalMeasurement(cm, line); |
| |
| var info = mapFromLineView(view, line, lineN); |
| return { |
| line: line, view: view, rect: null, |
| map: info.map, cache: info.cache, before: info.before, |
| hasHeights: false |
| }; |
| } |
| |
| // Given a prepared measurement object, measures the position of an |
| // actual character (or fetches it from the cache). |
| function measureCharPrepared(cm, prepared, ch, bias) { |
| if (prepared.before) ch = -1; |
| var key = ch + (bias || ""), found; |
| if (prepared.cache.hasOwnProperty(key)) { |
| found = prepared.cache[key]; |
| } else { |
| if (!prepared.rect) |
| prepared.rect = prepared.view.text.getBoundingClientRect(); |
| if (!prepared.hasHeights) { |
| ensureLineHeights(cm, prepared.view, prepared.rect); |
| prepared.hasHeights = true; |
| } |
| found = measureCharInner(cm, prepared, ch, bias); |
| if (!found.bogus) prepared.cache[key] = found; |
| } |
| return {left: found.left, right: found.right, top: found.top, bottom: found.bottom}; |
| } |
| |
| var nullRect = {left: 0, right: 0, top: 0, bottom: 0}; |
| |
| function measureCharInner(cm, prepared, ch, bias) { |
| var map = prepared.map; |
| |
| var node, start, end, collapse; |
| // First, search the line map for the text node corresponding to, |
| // or closest to, the target character. |
| for (var i = 0; i < map.length; i += 3) { |
| var mStart = map[i], mEnd = map[i + 1]; |
| if (ch < mStart) { |
| start = 0; end = 1; |
| collapse = "left"; |
| } else if (ch < mEnd) { |
| start = ch - mStart; |
| end = start + 1; |
| } else if (i == map.length - 3 || ch == mEnd && map[i + 3] > ch) { |
| end = mEnd - mStart; |
| start = end - 1; |
| if (ch >= mEnd) collapse = "right"; |
| } |
| if (start != null) { |
| node = map[i + 2]; |
| if (mStart == mEnd && bias == (node.insertLeft ? "left" : "right")) |
| collapse = bias; |
| if (bias == "left" && start == 0) |
| while (i && map[i - 2] == map[i - 3] && map[i - 1].insertLeft) { |
| node = map[(i -= 3) + 2]; |
| collapse = "left"; |
| } |
| if (bias == "right" && start == mEnd - mStart) |
| while (i < map.length - 3 && map[i + 3] == map[i + 4] && !map[i + 5].insertLeft) { |
| node = map[(i += 3) + 2]; |
| collapse = "right"; |
| } |
| break; |
| } |
| } |
| |
| var rect; |
| if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates. |
| while (start && isExtendingChar(prepared.line.text.charAt(mStart + start))) --start; |
| while (mStart + end < mEnd && isExtendingChar(prepared.line.text.charAt(mStart + end))) ++end; |
| if (ie_upto8 && start == 0 && end == mEnd - mStart) { |
| rect = node.parentNode.getBoundingClientRect(); |
| } else if (ie && cm.options.lineWrapping) { |
| var rects = range(node, start, end).getClientRects(); |
| if (rects.length) |
| rect = rects[bias == "right" ? rects.length - 1 : 0]; |
| else |
| rect = nullRect; |
| } else { |
| rect = range(node, start, end).getBoundingClientRect(); |
| } |
| } else { // If it is a widget, simply get the box for the whole widget. |
| if (start > 0) collapse = bias = "right"; |
| var rects; |
| if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1) |
| rect = rects[bias == "right" ? rects.length - 1 : 0]; |
| else |
| rect = node.getBoundingClientRect(); |
| } |
| if (ie_upto8 && !start && (!rect || !rect.left && !rect.right)) { |
| var rSpan = node.parentNode.getClientRects()[0]; |
| if (rSpan) |
| rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; |
| else |
| rect = nullRect; |
| } |
| |
| var top, bot = (rect.bottom + rect.top) / 2 - prepared.rect.top; |
| var heights = prepared.view.measure.heights; |
| for (var i = 0; i < heights.length - 1; i++) |
| if (bot < heights[i]) break; |
| top = i ? heights[i - 1] : 0; bot = heights[i]; |
| var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left, |
| right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left, |
| top: top, bottom: bot}; |
| if (!rect.left && !rect.right) result.bogus = true; |
| return result; |
| } |
| |
| function clearLineMeasurementCacheFor(lineView) { |
| if (lineView.measure) { |
| lineView.measure.cache = {}; |
| lineView.measure.heights = null; |
| if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) |
| lineView.measure.caches[i] = {}; |
| } |
| } |
| |
| function clearLineMeasurementCache(cm) { |
| cm.display.externalMeasure = null; |
| removeChildren(cm.display.lineMeasure); |
| for (var i = 0; i < cm.display.view.length; i++) |
| clearLineMeasurementCacheFor(cm.display.view[i]); |
| } |
| |
| function clearCaches(cm) { |
| clearLineMeasurementCache(cm); |
| cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null; |
| if (!cm.options.lineWrapping) cm.display.maxLineChanged = true; |
| cm.display.lineNumChars = null; |
| } |
| |
| function pageScrollX() { return window.pageXOffset || (document.documentElement || document.body).scrollLeft; } |
| function pageScrollY() { return window.pageYOffset || (document.documentElement || document.body).scrollTop; } |
| |
| // Converts a {top, bottom, left, right} box from line-local |
| // coordinates into another coordinate system. Context may be one of |
| // "line", "div" (display.lineDiv), "local"/null (editor), or "page". |
| function intoCoordSystem(cm, lineObj, rect, context) { |
| if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) { |
| var size = widgetHeight(lineObj.widgets[i]); |
| rect.top += size; rect.bottom += size; |
| } |
| if (context == "line") return rect; |
| if (!context) context = "local"; |
| var yOff = heightAtLine(lineObj); |
| if (context == "local") yOff += paddingTop(cm.display); |
| else yOff -= cm.display.viewOffset; |
| if (context == "page" || context == "window") { |
| var lOff = cm.display.lineSpace.getBoundingClientRect(); |
| yOff += lOff.top + (context == "window" ? 0 : pageScrollY()); |
| var xOff = lOff.left + (context == "window" ? 0 : pageScrollX()); |
| rect.left += xOff; rect.right += xOff; |
| } |
| rect.top += yOff; rect.bottom += yOff; |
| return rect; |
| } |
| |
| // Coverts a box from "div" coords to another coordinate system. |
| // Context may be "window", "page", "div", or "local"/null. |
| function fromCoordSystem(cm, coords, context) { |
| if (context == "div") return coords; |
| var left = coords.left, top = coords.top; |
| // First move into "page" coordinate system |
| if (context == "page") { |
| left -= pageScrollX(); |
| top -= pageScrollY(); |
| } else if (context == "local" || !context) { |
| var localBox = cm.display.sizer.getBoundingClientRect(); |
| left += localBox.left; |
| top += localBox.top; |
| } |
| |
| var lineSpaceBox = cm.display.lineSpace.getBoundingClientRect(); |
| return {left: left - lineSpaceBox.left, top: top - lineSpaceBox.top}; |
| } |
| |
| function charCoords(cm, pos, context, lineObj, bias) { |
| if (!lineObj) lineObj = getLine(cm.doc, pos.line); |
| return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch, bias), context); |
| } |
| |
| // Returns a box for a given cursor position, which may have an |
| // 'other' property containing the position of the secondary cursor |
| // on a bidi boundary. |
| function cursorCoords(cm, pos, context, lineObj, preparedMeasure) { |
| lineObj = lineObj || getLine(cm.doc, pos.line); |
| if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj); |
| function get(ch, right) { |
| var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left"); |
| if (right) m.left = m.right; else m.right = m.left; |
| return intoCoordSystem(cm, lineObj, m, context); |
| } |
| function getBidi(ch, partPos) { |
| var part = order[partPos], right = part.level % 2; |
| if (ch == bidiLeft(part) && partPos && part.level < order[partPos - 1].level) { |
| part = order[--partPos]; |
| ch = bidiRight(part) - (part.level % 2 ? 0 : 1); |
| right = true; |
| } else if (ch == bidiRight(part) && partPos < order.length - 1 && part.level < order[partPos + 1].level) { |
| part = order[++partPos]; |
| ch = bidiLeft(part) - part.level % 2; |
| right = false; |
| } |
| if (right && ch == part.to && ch > part.from) return get(ch - 1); |
| return get(ch, right); |
| } |
| var order = getOrder(lineObj), ch = pos.ch; |
| if (!order) return get(ch); |
| var partPos = getBidiPartAt(order, ch); |
| var val = getBidi(ch, partPos); |
| if (bidiOther != null) val.other = getBidi(ch, bidiOther); |
| return val; |
| } |
| |
| // Used to cheaply estimate the coordinates for a position. Used for |
| // intermediate scroll updates. |
| function estimateCoords(cm, pos) { |
| var left = 0, pos = clipPos(cm.doc, pos); |
| if (!cm.options.lineWrapping) left = charWidth(cm.display) * pos.ch; |
| var lineObj = getLine(cm.doc, pos.line); |
| var top = heightAtLine(lineObj) + paddingTop(cm.display); |
| return {left: left, right: left, top: top, bottom: top + lineObj.height}; |
| } |
| |
| // Positions returned by coordsChar contain some extra information. |
| // xRel is the relative x position of the input coordinates compared |
| // to the found position (so xRel > 0 means the coordinates are to |
| // the right of the character position, for example). When outside |
| // is true, that means the coordinates lie outside the line's |
| // vertical range. |
| function PosWithInfo(line, ch, outside, xRel) { |
| var pos = Pos(line, ch); |
| pos.xRel = xRel; |
| if (outside) pos.outside = true; |
| return pos; |
| } |
| |
| // Compute the character position closest to the given coordinates. |
| // Input must be lineSpace-local ("div" coordinate system). |
| function coordsChar(cm, x, y) { |
| var doc = cm.doc; |
| y += cm.display.viewOffset; |
| if (y < 0) return PosWithInfo(doc.first, 0, true, -1); |
| var lineN = lineAtHeight(doc, y), last = doc.first + doc.size - 1; |
| if (lineN > last) |
| return PosWithInfo(doc.first + doc.size - 1, getLine(doc, last).text.length, true, 1); |
| if (x < 0) x = 0; |
| |
| var lineObj = getLine(doc, lineN); |
| for (;;) { |
| var found = coordsCharInner(cm, lineObj, lineN, x, y); |
| var merged = collapsedSpanAtEnd(lineObj); |
| var mergedPos = merged && merged.find(0, true); |
| if (merged && (found.ch > mergedPos.from.ch || found.ch == mergedPos.from.ch && found.xRel > 0)) |
| lineN = lineNo(lineObj = mergedPos.to.line); |
| else |
| return found; |
| } |
| } |
| |
| function coordsCharInner(cm, lineObj, lineNo, x, y) { |
| var innerOff = y - heightAtLine(lineObj); |
| var wrongLine = false, adjust = 2 * cm.display.wrapper.clientWidth; |
| var preparedMeasure = prepareMeasureForLine(cm, lineObj); |
| |
| function getX(ch) { |
| var sp = cursorCoords(cm, Pos(lineNo, ch), "line", lineObj, preparedMeasure); |
| wrongLine = true; |
| if (innerOff > sp.bottom) return sp.left - adjust; |
| else if (innerOff < sp.top) return sp.left + adjust; |
| else wrongLine = false; |
| return sp.left; |
| } |
| |
| var bidi = getOrder(lineObj), dist = lineObj.text.length; |
| var from = lineLeft(lineObj), to = lineRight(lineObj); |
| var fromX = getX(from), fromOutside = wrongLine, toX = getX(to), toOutside = wrongLine; |
| |
| if (x > toX) return PosWithInfo(lineNo, to, toOutside, 1); |
| // Do a binary search between these bounds. |
| for (;;) { |
| if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) { |
| var ch = x < fromX || x - fromX <= toX - x ? from : to; |
| var xDiff = x - (ch == from ? fromX : toX); |
| while (isExtendingChar(lineObj.text.charAt(ch))) ++ch; |
| var pos = PosWithInfo(lineNo, ch, ch == from ? fromOutside : toOutside, |
| xDiff < -1 ? -1 : xDiff > 1 ? 1 : 0); |
| return pos; |
| } |
| var step = Math.ceil(dist / 2), middle = from + step; |
| if (bidi) { |
| middle = from; |
| for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1); |
| } |
| var middleX = getX(middle); |
| if (middleX > x) {to = middle; toX = middleX; if (toOutside = wrongLine) toX += 1000; dist = step;} |
| else {from = middle; fromX = middleX; fromOutside = wrongLine; dist -= step;} |
| } |
| } |
| |
| var measureText; |
| // Compute the default text height. |
| function textHeight(display) { |
| if (display.cachedTextHeight != null) return display.cachedTextHeight; |
| if (measureText == null) { |
| measureText = elt("pre"); |
| // Measure a bunch of lines, for browsers that compute |
| // fractional heights. |
| for (var i = 0; i < 49; ++i) { |
| measureText.appendChild(document.createTextNode("x")); |
| measureText.appendChild(elt("br")); |
| } |
| measureText.appendChild(document.createTextNode("x")); |
| } |
| removeChildrenAndAdd(display.measure, measureText); |
| var height = measureText.offsetHeight / 50; |
| if (height > 3) display.cachedTextHeight = height; |
| removeChildren(display.measure); |
| return height || 1; |
| } |
| |
| // Compute the default character width. |
| function charWidth(display) { |
| if (display.cachedCharWidth != null) return display.cachedCharWidth; |
| var anchor = elt("span", "xxxxxxxxxx"); |
| var pre = elt("pre", [anchor]); |
| removeChildrenAndAdd(display.measure, pre); |
| var rect = anchor.getBoundingClientRect(), width = (rect.right - rect.left) / 10; |
| if (width > 2) display.cachedCharWidth = width; |
| return width || 10; |
| } |
| |
| // OPERATIONS |
| |
| // Operations are used to wrap a series of changes to the editor |
| // state in such a way that each change won't have to update the |
| // cursor and display (which would be awkward, slow, and |
| // error-prone). Instead, display updates are batched and then all |
| // combined and executed at once. |
| |
| var nextOpId = 0; |
| // Start a new operation. |
| function startOperation(cm) { |
| cm.curOp = { |
| viewChanged: false, // Flag that indicates that lines might need to be redrawn |
| startHeight: cm.doc.height, // Used to detect need to update scrollbar |
| forceUpdate: false, // Used to force a redraw |
| updateInput: null, // Whether to reset the input textarea |
| typing: false, // Whether this reset should be careful to leave existing text (for compositing) |
| changeObjs: null, // Accumulated changes, for firing change events |
| cursorActivityHandlers: null, // Set of handlers to fire cursorActivity on |
| selectionChanged: false, // Whether the selection needs to be redrawn |
| updateMaxLine: false, // Set when the widest line needs to be determined anew |
| scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet |
| scrollToPos: null, // Used to scroll to a specific position |
| id: ++nextOpId // Unique ID |
| }; |
| if (!delayedCallbackDepth++) delayedCallbacks = []; |
| } |
| |
| // Finish an operation, updating the display and signalling delayed events |
| function endOperation(cm) { |
| var op = cm.curOp, doc = cm.doc, display = cm.display; |
| cm.curOp = null; |
| |
| if (op.updateMaxLine) findMaxLine(cm); |
| |
| // If it looks like an update might be needed, call updateDisplay |
| if (op.viewChanged || op.forceUpdate || op.scrollTop != null || |
| op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom || |
| op.scrollToPos.to.line >= display.viewTo) || |
| display.maxLineChanged && cm.options.lineWrapping) { |
| var updated = updateDisplay(cm, {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate); |
| if (cm.display.scroller.offsetHeight) cm.doc.scrollTop = cm.display.scroller.scrollTop; |
| } |
| // If no update was run, but the selection changed, redraw that. |
| if (!updated && op.selectionChanged) updateSelection(cm); |
| if (!updated && op.startHeight != cm.doc.height) updateScrollbars(cm); |
| |
| // Propagate the scroll position to the actual DOM scroller |
| if (op.scrollTop != null && display.scroller.scrollTop != op.scrollTop) { |
| var top = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop)); |
| display.scroller.scrollTop = display.scrollbarV.scrollTop = doc.scrollTop = top; |
| } |
| if (op.scrollLeft != null && display.scroller.scrollLeft != op.scrollLeft) { |
| var left = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft)); |
| display.scroller.scrollLeft = display.scrollbarH.scrollLeft = doc.scrollLeft = left; |
| alignHorizontally(cm); |
| } |
| // If we need to scroll a specific position into view, do so. |
| if (op.scrollToPos) { |
| var coords = scrollPosIntoView(cm, clipPos(cm.doc, op.scrollToPos.from), |
| clipPos(cm.doc, op.scrollToPos.to), op.scrollToPos.margin); |
| if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords); |
| } |
| |
| if (op.selectionChanged) restartBlink(cm); |
| |
| if (cm.state.focused && op.updateInput) |
| resetInput(cm, op.typing); |
| |
| // Fire events for markers that are hidden/unidden by editing or |
| // undoing |
| var hidden = op.maybeHiddenMarkers, unhidden = op.maybeUnhiddenMarkers; |
| if (hidden) for (var i = 0; i < hidden.length; ++i) |
| if (!hidden[i].lines.length) signal(hidden[i], "hide"); |
| if (unhidden) for (var i = 0; i < unhidden.length; ++i) |
| if (unhidden[i].lines.length) signal(unhidden[i], "unhide"); |
| |
| var delayed; |
| if (!--delayedCallbackDepth) { |
| delayed = delayedCallbacks; |
| delayedCallbacks = null; |
| } |
| // Fire change events, and delayed event handlers |
| if (op.changeObjs) |
| signal(cm, "changes", cm, op.changeObjs); |
| if (delayed) for (var i = 0; i < delayed.length; ++i) delayed[i](); |
| if (op.cursorActivityHandlers) |
| for (var i = 0; i < op.cursorActivityHandlers.length; i++) |
| op.cursorActivityHandlers[i](cm); |
| } |
| |
| // Run the given function in an operation |
| function runInOp(cm, f) { |
| if (cm.curOp) return f(); |
| startOperation(cm); |
| try { return f(); } |
| finally { endOperation(cm); } |
| } |
| // Wraps a function in an operation. Returns the wrapped function. |
| function operation(cm, f) { |
| return function() { |
| if (cm.curOp) return f.apply(cm, arguments); |
| startOperation(cm); |
| try { return f.apply(cm, arguments); } |
| finally { endOperation(cm); } |
| }; |
| } |
| // Used to add methods to editor and doc instances, wrapping them in |
| // operations. |
| function methodOp(f) { |
| return function() { |
| if (this.curOp) return f.apply(this, arguments); |
| startOperation(this); |
| try { return f.apply(this, arguments); } |
| finally { endOperation(this); } |
| }; |
| } |
| function docMethodOp(f) { |
| return function() { |
| var cm = this.cm; |
| if (!cm || cm.curOp) return f.apply(this, arguments); |
| startOperation(cm); |
| try { return f.apply(this, arguments); } |
| finally { endOperation(cm); } |
| }; |
| } |
| |
| // VIEW TRACKING |
| |
| // These objects are used to represent the visible (currently drawn) |
| // part of the document. A LineView may correspond to multiple |
| // logical lines, if those are connected by collapsed ranges. |
| function LineView(doc, line, lineN) { |
| // The starting line |
| this.line = line; |
| // Continuing lines, if any |
| this.rest = visualLineContinued(line); |
| // Number of logical lines in this visual line |
| this.size = this.rest ? lineNo(lst(this.rest)) - lineN + 1 : 1; |
| this.node = this.text = null; |
| this.hidden = lineIsHidden(doc, line); |
| } |
| |
| // Create a range of LineView objects for the given lines. |
| function buildViewArray(cm, from, to) { |
| var array = [], nextPos; |
| for (var pos = from; pos < to; pos = nextPos) { |
| var view = new LineView(cm.doc, getLine(cm.doc, pos), pos); |
| nextPos = pos + view.size; |
| array.push(view); |
| } |
| return array; |
| } |
| |
| // Updates the display.view data structure for a given change to the |
| // document. From and to are in pre-change coordinates. Lendiff is |
| // the amount of lines added or subtracted by the change. This is |
| // used for changes that span multiple lines, or change the way |
| // lines are divided into visual lines. regLineChange (below) |
| // registers single-line changes. |
| function regChange(cm, from, to, lendiff) { |
| if (from == null) from = cm.doc.first; |
| if (to == null) to = cm.doc.first + cm.doc.size; |
| if (!lendiff) lendiff = 0; |
| |
| var display = cm.display; |
| if (lendiff && to < display.viewTo && |
| (display.updateLineNumbers == null || display.updateLineNumbers > from)) |
| display.updateLineNumbers = from; |
| |
| cm.curOp.viewChanged = true; |
| |
| if (from >= display.viewTo) { // Change after |
| if (sawCollapsedSpans && visualLineNo(cm.doc, from) < display.viewTo) |
| resetView(cm); |
| } else if (to <= display.viewFrom) { // Change before |
| if (sawCollapsedSpans && visualLineEndNo(cm.doc, to + lendiff) > display.viewFrom) { |
| resetView(cm); |
| } else { |
| display.viewFrom += lendiff; |
| display.viewTo += lendiff; |
| } |
| } else if (from <= display.viewFrom && to >= display.viewTo) { // Full overlap |
| resetView(cm); |
| } else if (from <= display.viewFrom) { // Top overlap |
| var cut = viewCuttingPoint(cm, to, to + lendiff, 1); |
| if (cut) { |
| display.view = display.view.slice(cut.index); |
| display.viewFrom = cut.lineN; |
| display.viewTo += lendiff; |
| } else { |
| resetView(cm); |
| } |
| } else if (to >= display.viewTo) { // Bottom overlap |
| var cut = viewCuttingPoint(cm, from, from, -1); |
| if (cut) { |
| display.view = display.view.slice(0, cut.index); |
| display.viewTo = cut.lineN; |
| } else { |
| resetView(cm); |
| } |
| } else { // Gap in the middle |
| var cutTop = viewCuttingPoint(cm, from, from, -1); |
| var cutBot = viewCuttingPoint(cm, to, to + lendiff, 1); |
| if (cutTop && cutBot) { |
| display.view = display.view.slice(0, cutTop.index) |
| .concat(buildViewArray(cm, cutTop.lineN, cutBot.lineN)) |
| .concat(display.view.slice(cutBot.index)); |
| display.viewTo += lendiff; |
| } else { |
| resetView(cm); |
| } |
| } |
| |
| var ext = display.externalMeasured; |
| if (ext) { |
| if (to < ext.lineN) |
| ext.lineN += lendiff; |
| else if (from < ext.lineN + ext.size) |
| display.externalMeasured = null; |
| } |
| } |
| |
| // Register a change to a single line. Type must be one of "text", |
| // "gutter", "class", "widget" |
| function regLineChange(cm, line, type) { |
| cm.curOp.viewChanged = true; |
| var display = cm.display, ext = cm.display.externalMeasured; |
| if (ext && line >= ext.lineN && line < ext.lineN + ext.size) |
| display.externalMeasured = null; |
| |
| if (line < display.viewFrom || line >= display.viewTo) return; |
| var lineView = display.view[findViewIndex(cm, line)]; |
| if (lineView.node == null) return; |
| var arr = lineView.changes || (lineView.changes = []); |
| if (indexOf(arr, type) == -1) arr.push(type); |
| } |
| |
| // Clear the view. |
| function resetView(cm) { |
| cm.display.viewFrom = cm.display.viewTo = cm.doc.first; |
| cm.display.view = []; |
| cm.display.viewOffset = 0; |
| } |
| |
| // Find the view element corresponding to a given line. Return null |
| // when the line isn't visible. |
| function findViewIndex(cm, n) { |
| if (n >= cm.display.viewTo) return null; |
| n -= cm.display.viewFrom; |
| if (n < 0) return null; |
| var view = cm.display.view; |
| for (var i = 0; i < view.length; i++) { |
| n -= view[i].size; |
| if (n < 0) return i; |
| } |
| } |
| |
| function viewCuttingPoint(cm, oldN, newN, dir) { |
| var index = findViewIndex(cm, oldN), diff, view = cm.display.view; |
| if (!sawCollapsedSpans) return {index: index, lineN: newN}; |
| for (var i = 0, n = cm.display.viewFrom; i < index; i++) |
| n += view[i].size; |
| if (n != oldN) { |
| if (dir > 0) { |
| if (index == view.length - 1) return null; |
| diff = (n + view[index].size) - oldN; |
| index++; |
| } else { |
| diff = n - oldN; |
| } |
| oldN += diff; newN += diff; |
| } |
| while (visualLineNo(cm.doc, newN) != newN) { |
| if (index == (dir < 0 ? 0 : view.length - 1)) return null; |
| newN += dir * view[index - (dir < 0 ? 1 : 0)].size; |
| index += dir; |
| } |
| return {index: index, lineN: newN}; |
| } |
| |
| // Force the view to cover a given range, adding empty view element |
| // or clipping off existing ones as needed. |
| function adjustView(cm, from, to) { |
| var display = cm.display, view = display.view; |
| if (view.length == 0 || from >= display.viewTo || to <= display.viewFrom) { |
| display.view = buildViewArray(cm, from, to); |
| display.viewFrom = from; |
| } else { |
| if (display.viewFrom > from) |
| display.view = buildViewArray(cm, from, display.viewFrom).concat(display.view); |
| else if (display.viewFrom < from) |
| display.view = display.view.slice(findViewIndex(cm, from)); |
| display.viewFrom = from; |
| if (display.viewTo < to) |
| display.view = display.view.concat(buildViewArray(cm, display.viewTo, to)); |
| else if (display.viewTo > to) |
| display.view = display.view.slice(0, findViewIndex(cm, to)); |
| } |
| display.viewTo = to; |
| } |
| |
| // Count the number of lines in the view whose DOM representation is |
| // out of date (or nonexistent). |
| function countDirtyView(cm) { |
| var view = cm.display.view, dirty = 0; |
| for (var i = 0; i < view.length; i++) { |
| var lineView = view[i]; |
| if (!lineView.hidden && (!lineView.node || lineView.changes)) ++dirty; |
| } |
| return dirty; |
| } |
| |
| // INPUT HANDLING |
| |
| // Poll for input changes, using the normal rate of polling. This |
| // runs as long as the editor is focused. |
| function slowPoll(cm) { |
| if (cm.display.pollingFast) return; |
| cm.display.poll.set(cm.options.pollInterval, function() { |
| readInput(cm); |
| if (cm.state.focused) slowPoll(cm); |
| }); |
| } |
| |
| // When an event has just come in that is likely to add or change |
| // something in the input textarea, we poll faster, to ensure that |
| // the change appears on the screen quickly. |
| function fastPoll(cm) { |
| var missed = false; |
| cm.display.pollingFast = true; |
| function p() { |
| var changed = readInput(cm); |
| if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);} |
| else {cm.display.pollingFast = false; slowPoll(cm);} |
| } |
| cm.display.poll.set(20, p); |
| } |
| |
| // Read input from the textarea, and update the document to match. |
| // When something is selected, it is present in the textarea, and |
| // selected (unless it is huge, in which case a placeholder is |
| // used). When nothing is selected, the cursor sits after previously |
| // seen text (can be empty), which is stored in prevInput (we must |
| // not reset the textarea when typing, because that breaks IME). |
| function readInput(cm) { |
| var input = cm.display.input, prevInput = cm.display.prevInput, doc = cm.doc; |
| // Since this is called a *lot*, try to bail out as cheaply as |
| // possible when it is clear that nothing happened. hasSelection |
| // will be the case when there is a lot of text in the textarea, |
| // in which case reading its value would be expensive. |
| if (!cm.state.focused || (hasSelection(input) && !prevInput) || isReadOnly(cm) || cm.options.disableInput) |
| return false; |
| // See paste handler for more on the fakedLastChar kludge |
| if (cm.state.pasteIncoming && cm.state.fakedLastChar) { |
| input.value = input.value.substring(0, input.value.length - 1); |
| cm.state.fakedLastChar = false; |
| } |
| var text = input.value; |
| // If nothing changed, bail. |
| if (text == prevInput && !cm.somethingSelected()) return false; |
| // Work around nonsensical selection resetting in IE9/10 |
| if (ie && !ie_upto8 && cm.display.inputHasSelection === text) { |
| resetInput(cm); |
| return false; |
| } |
| |
| var withOp = !cm.curOp; |
| if (withOp) startOperation(cm); |
| cm.display.shift = false; |
| |
| // Find the part of the input that is actually new |
| var same = 0, l = Math.min(prevInput.length, text.length); |
| while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same; |
| var inserted = text.slice(same), textLines = splitLines(inserted); |
| |
| // When pasing N lines into N selections, insert one line per selection |
| var multiPaste = cm.state.pasteIncoming && textLines.length > 1 && doc.sel.ranges.length == textLines.length; |
| |
| // Normal behavior is to insert the new text into every selection |
| for (var i = doc.sel.ranges.length - 1; i >= 0; i--) { |
| var range = doc.sel.ranges[i]; |
| var from = range.from(), to = range.to(); |
| // Handle deletion |
| if (same < prevInput.length) |
| from = Pos(from.line, from.ch - (prevInput.length - same)); |
| // Handle overwrite |
| else if (cm.state.overwrite && range.empty() && !cm.state.pasteIncoming) |
| to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); |
| var updateInput = cm.curOp.updateInput; |
| var changeEvent = {from: from, to: to, text: multiPaste ? [textLines[i]] : textLines, |
| origin: cm.state.pasteIncoming ? "paste" : cm.state.cutIncoming ? "cut" : "+input"}; |
| makeChange(cm.doc, changeEvent); |
| signalLater(cm, "inputRead", cm, changeEvent); |
| // When an 'electric' character is inserted, immediately trigger a reindent |
| if (inserted && !cm.state.pasteIncoming && cm.options.electricChars && |
| cm.options.smartIndent && range.head.ch < 100 && |
| (!i || doc.sel.ranges[i - 1].head.line != range.head.line)) { |
| var mode = cm.getModeAt(range.head); |
| if (mode.electricChars) { |
| for (var j = 0; j < mode.electricChars.length; j++) |
| if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) { |
| indentLine(cm, range.head.line, "smart"); |
| break; |
| } |
| } else if (mode.electricInput) { |
| var end = changeEnd(changeEvent); |
| if (mode.electricInput.test(getLine(doc, end.line).text.slice(0, end.ch))) |
| indentLine(cm, range.head.line, "smart"); |
| } |
| } |
| } |
| ensureCursorVisible(cm); |
| cm.curOp.updateInput = updateInput; |
| cm.curOp.typing = true; |
| |
| // Don't leave long text in the textarea, since it makes further polling slow |
| if (text.length > 1000 || text.indexOf("\n") > -1) input.value = cm.display.prevInput = ""; |
| else cm.display.prevInput = text; |
| if (withOp) endOperation(cm); |
| cm.state.pasteIncoming = cm.state.cutIncoming = false; |
| return true; |
| } |
| |
| // Reset the input to correspond to the selection (or to be empty, |
| // when not typing and nothing is selected) |
| function resetInput(cm, typing) { |
| var minimal, selected, doc = cm.doc; |
| if (cm.somethingSelected()) { |
| cm.display.prevInput = ""; |
| var range = doc.sel.primary(); |
| minimal = hasCopyEvent && |
| (range.to().line - range.from().line > 100 || (selected = cm.getSelection()).length > 1000); |
| var content = minimal ? "-" : selected || cm.getSelection(); |
| cm.display.input.value = content; |
| if (cm.state.focused) selectInput(cm.display.input); |
| if (ie && !ie_upto8) cm.display.inputHasSelection = content; |
| } else if (!typing) { |
| cm.display.prevInput = cm.display.input.value = ""; |
| if (ie && !ie_upto8) cm.display.inputHasSelection = null; |
| } |
| cm.display.inaccurateSelection = minimal; |
| } |
| |
| function focusInput(cm) { |
| if (cm.options.readOnly != "nocursor" && (!mobile || activeElt() != cm.display.input)) |
| cm.display.input.focus(); |
| } |
| |
| function ensureFocus(cm) { |
| if (!cm.state.focused) { focusInput(cm); onFocus(cm); } |
| } |
| |
| function isReadOnly(cm) { |
| return cm.options.readOnly || cm.doc.cantEdit; |
| } |
| |
| // EVENT HANDLERS |
| |
| // Attach the necessary event handlers when initializing the editor |
| function registerEventHandlers(cm) { |
| var d = cm.display; |
| on(d.scroller, "mousedown", operation(cm, onMouseDown)); |
| // Older IE's will not fire a second mousedown for a double click |
| if (ie_upto10) |
| on(d.scroller, "dblclick", operation(cm, function(e) { |
| if (signalDOMEvent(cm, e)) return; |
| var pos = posFromMouse(cm, e); |
| if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return; |
| e_preventDefault(e); |
| var word = findWordAt(cm.doc, pos); |
| extendSelection(cm.doc, word.anchor, word.head); |
| })); |
| else |
| on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); }); |
| // Prevent normal selection in the editor (we handle our own) |
| on(d.lineSpace, "selectstart", function(e) { |
| if (!eventInWidget(d, e)) e_preventDefault(e); |
| }); |
| // Some browsers fire contextmenu *after* opening the menu, at |
| // which point we can't mess with it anymore. Context menu is |
| // handled in onMouseDown for these browsers. |
| if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);}); |
| |
| // Sync scrolling between fake scrollbars and real scrollable |
| // area, ensure viewport is updated when scrolling. |
| on(d.scroller, "scroll", function() { |
| if (d.scroller.clientHeight) { |
| setScrollTop(cm, d.scroller.scrollTop); |
| setScrollLeft(cm, d.scroller.scrollLeft, true); |
| signal(cm, "scroll", cm); |
| } |
| }); |
| on(d.scrollbarV, "scroll", function() { |
| if (d.scroller.clientHeight) setScrollTop(cm, d.scrollbarV.scrollTop); |
| }); |
| on(d.scrollbarH, "scroll", function() { |
| if (d.scroller.clientHeight) setScrollLeft(cm, d.scrollbarH.scrollLeft); |
| }); |
| |
| // Listen to wheel events in order to try and update the viewport on time. |
| on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);}); |
| on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);}); |
| |
| // Prevent clicks in the scrollbars from killing focus |
| function reFocus() { if (cm.state.focused) setTimeout(bind(focusInput, cm), 0); } |
| on(d.scrollbarH, "mousedown", reFocus); |
| on(d.scrollbarV, "mousedown", reFocus); |
| // Prevent wrapper from ever scrolling |
| on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; }); |
| |
| // When the window resizes, we need to refresh active editors. |
| var resizeTimer; |
| function onResize() { |
| if (resizeTimer == null) resizeTimer = setTimeout(function() { |
| resizeTimer = null; |
| // Might be a text scaling operation, clear size caches. |
| d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = knownScrollbarWidth = null; |
| cm.setSize(); |
| }, 100); |
| } |
| on(window, "resize", onResize); |
| // The above handler holds on to the editor and its data |
| // structures. Here we poll to unregister it when the editor is no |
| // longer in the document, so that it can be garbage-collected. |
| function unregister() { |
| if (contains(document.body, d.wrapper)) setTimeout(unregister, 5000); |
| else off(window, "resize", onResize); |
| } |
| setTimeout(unregister, 5000); |
| |
| on(d.input, "keyup", operation(cm, onKeyUp)); |
| on(d.input, "input", function() { |
| if (ie && !ie_upto8 && cm.display.inputHasSelection) cm.display.inputHasSelection = null; |
| fastPoll(cm); |
| }); |
| on(d.input, "keydown", operation(cm, onKeyDown)); |
| on(d.input, "keypress", operation(cm, onKeyPress)); |
| on(d.input, "focus", bind(onFocus, cm)); |
| on(d.input, "blur", bind(onBlur, cm)); |
| |
| function drag_(e) { |
| if (!signalDOMEvent(cm, e)) e_stop(e); |
| } |
| if (cm.options.dragDrop) { |
| on(d.scroller, "dragstart", function(e){onDragStart(cm, e);}); |
| on(d.scroller, "dragenter", drag_); |
| on(d.scroller, "dragover", drag_); |
| on(d.scroller, "drop", operation(cm, onDrop)); |
| } |
| on(d.scroller, "paste", function(e) { |
| if (eventInWidget(d, e)) return; |
| cm.state.pasteIncoming = true; |
| focusInput(cm); |
| fastPoll(cm); |
| }); |
| on(d.input, "paste", function() { |
| // Workaround for webkit bug https://bugs.webkit.org/show_bug.cgi?id=90206 |
| // Add a char to the end of textarea before paste occur so that |
| // selection doesn't span to the end of textarea. |
| if (webkit && !cm.state.fakedLastChar && !(new Date - cm.state.lastMiddleDown < 200)) { |
| var start = d.input.selectionStart, end = d.input.selectionEnd; |
| d.input.value += "$"; |
| d.input.selectionStart = start; |
| d.input.selectionEnd = end; |
| cm.state.fakedLastChar = true; |
| } |
| cm.state.pasteIncoming = true; |
| fastPoll(cm); |
| }); |
| |
| function prepareCopyCut(e) { |
| if (cm.somethingSelected()) { |
| if (d.inaccurateSelection) { |
| d.prevInput = ""; |
| d.inaccurateSelection = false; |
| d.input.value = cm.getSelection(); |
| selectInput(d.input); |
| } |
| } else { |
| var text = "", ranges = []; |
| for (var i = 0; i < cm.doc.sel.ranges.length; i++) { |
| var line = cm.doc.sel.ranges[i].head.line; |
| var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}; |
| ranges.push(lineRange); |
| text += cm.getRange(lineRange.anchor, lineRange.head); |
| } |
| if (e.type == "cut") { |
| cm.setSelections(ranges, null, sel_dontScroll); |
| } else { |
| d.prevInput = ""; |
| d.input.value = text; |
| selectInput(d.input); |
| } |
| } |
| if (e.type == "cut") cm.state.cutIncoming = true; |
| } |
| on(d.input, "cut", prepareCopyCut); |
| on(d.input, "copy", prepareCopyCut); |
| |
| // Needed to handle Tab key in KHTML |
| if (khtml) on(d.sizer, "mouseup", function() { |
| if (activeElt() == d.input) d.input.blur(); |
| focusInput(cm); |
| }); |
| } |
| |
| // MOUSE EVENTS |
| |
| // Return true when the given mouse event happened in a widget |
| function eventInWidget(display, e) { |
| for (var n = e_target(e); n != display.wrapper; n = n.parentNode) { |
| if (!n || n.ignoreEvents || n.parentNode == display.sizer && n != display.mover) return true; |
| } |
| } |
| |
| // Given a mouse event, find the corresponding position. If liberal |
| // is false, it checks whether a gutter or scrollbar was clicked, |
| // and returns null if it was. forRect is used by rectangular |
| // selections, and tries to estimate a character position even for |
| // coordinates beyond the right of the text. |
| function posFromMouse(cm, e, liberal, forRect) { |
| var display = cm.display; |
| if (!liberal) { |
| var target = e_target(e); |
| if (target == display.scrollbarH || target == display.scrollbarV || |
| target == display.scrollbarFiller || target == display.gutterFiller) return null; |
| } |
| var x, y, space = display.lineSpace.getBoundingClientRect(); |
| // Fails unpredictably on IE[67] when mouse is dragged around quickly. |
| try { x = e.clientX - space.left; y = e.clientY - space.top; } |
| catch (e) { return null; } |
| var coords = coordsChar(cm, x, y), line; |
| if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) { |
| var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length; |
| coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff)); |
| } |
| return coords; |
| } |
| |
| // A mouse down can be a single click, double click, triple click, |
| // start of selection drag, start of text drag, new cursor |
| // (ctrl-click), rectangle drag (alt-drag), or xwin |
| // middle-click-paste. Or it might be a click on something we should |
| // not interfere with, such as a scrollbar or widget. |
| function onMouseDown(e) { |
| if (signalDOMEvent(this, e)) return; |
| var cm = this, display = cm.display; |
| display.shift = e.shiftKey; |
| |
| if (eventInWidget(display, e)) { |
| if (!webkit) { |
| // Briefly turn off draggability, to allow widgets to do |
| // normal dragging things. |
| display.scroller.draggable = false; |
| setTimeout(function(){display.scroller.draggable = true;}, 100); |
| } |
| return; |
| } |
| if (clickInGutter(cm, e)) return; |
| var start = posFromMouse(cm, e); |
| window.focus(); |
| |
| switch (e_button(e)) { |
| case 1: |
| if (start) |
| leftButtonDown(cm, e, start); |
| else if (e_target(e) == display.scroller) |
| e_preventDefault(e); |
| break; |
| case 2: |
| if (webkit) cm.state.lastMiddleDown = +new Date; |
| if (start) extendSelection(cm.doc, start); |
| setTimeout(bind(focusInput, cm), 20); |
| e_preventDefault(e); |
| break; |
| case 3: |
| if (captureRightClick) onContextMenu(cm, e); |
| break; |
| } |
| } |
| |
| var lastClick, lastDoubleClick; |
| function leftButtonDown(cm, e, start) { |
| setTimeout(bind(ensureFocus, cm), 0); |
| |
| var now = +new Date, type; |
| if (lastDoubleClick && lastDoubleClick.time > now - 400 && cmp(lastDoubleClick.pos, start) == 0) { |
| type = "triple"; |
| } else if (lastClick && lastClick.time > now - 400 && cmp(lastClick.pos, start) == 0) { |
| type = "double"; |
| lastDoubleClick = {time: now, pos: start}; |
| } else { |
| type = "single"; |
| lastClick = {time: now, pos: start}; |
| } |
| |
| var sel = cm.doc.sel, addNew = mac ? e.metaKey : e.ctrlKey; |
| if (cm.options.dragDrop && dragAndDrop && !addNew && !isReadOnly(cm) && |
| type == "single" && sel.contains(start) > -1 && sel.somethingSelected()) |
| leftButtonStartDrag(cm, e, start); |
| else |
| leftButtonSelect(cm, e, start, type, addNew); |
| } |
| |
| // Start a text drag. When it ends, see if any dragging actually |
| // happen, and treat as a click if it didn't. |
| function leftButtonStartDrag(cm, e, start) { |
| var display = cm.display; |
| var dragEnd = operation(cm, function(e2) { |
| if (webkit) display.scroller.draggable = false; |
| cm.state.draggingText = false; |
| off(document, "mouseup", dragEnd); |
| off(display.scroller, "drop", dragEnd); |
| if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) { |
| e_preventDefault(e2); |
| extendSelection(cm.doc, start); |
| focusInput(cm); |
| // Work around unexplainable focus problem in IE9 (#2127) |
| if (ie_upto10 && !ie_upto8) |
| setTimeout(function() {document.body.focus(); focusInput(cm);}, 20); |
| } |
| }); |
| // Let the drag handler handle this. |
| if (webkit) display.scroller.draggable = true; |
| cm.state.draggingText = dragEnd; |
| // IE's approach to draggable |
| if (display.scroller.dragDrop) display.scroller.dragDrop(); |
| on(document, "mouseup", dragEnd); |
| on(display.scroller, "drop", dragEnd); |
| } |
| |
| // Normal selection, as opposed to text dragging. |
| function leftButtonSelect(cm, e, start, type, addNew) { |
| var display = cm.display, doc = cm.doc; |
| e_preventDefault(e); |
| |
| var ourRange, ourIndex, startSel = doc.sel; |
| if (addNew && !e.shiftKey) { |
| ourIndex = doc.sel.contains(start); |
| if (ourIndex > -1) |
| ourRange = doc.sel.ranges[ourIndex]; |
| else |
| ourRange = new Range(start, start); |
| } else { |
| ourRange = doc.sel.primary(); |
| } |
| |
| if (e.altKey) { |
| type = "rect"; |
| if (!addNew) ourRange = new Range(start, start); |
| start = posFromMouse(cm, e, true, true); |
| ourIndex = -1; |
| } else if (type == "double") { |
| var word = findWordAt(doc, start); |
| if (cm.display.shift || doc.extend) |
| ourRange = extendRange(doc, ourRange, word.anchor, word.head); |
| else |
| ourRange = word; |
| } else if (type == "triple") { |
| var line = new Range(Pos(start.line, 0), clipPos(doc, Pos(start.line + 1, 0))); |
| if (cm.display.shift || doc.extend) |
| ourRange = extendRange(doc, ourRange, line.anchor, line.head); |
| else |
| ourRange = line; |
| } else { |
| ourRange = extendRange(doc, ourRange, start); |
| } |
| |
| if (!addNew) { |
| ourIndex = 0; |
| setSelection(doc, new Selection([ourRange], 0), sel_mouse); |
| startSel = doc.sel; |
| } else if (ourIndex > -1) { |
| replaceOneSelection(doc, ourIndex, ourRange, sel_mouse); |
| } else { |
| ourIndex = doc.sel.ranges.length; |
| setSelection(doc, normalizeSelection(doc.sel.ranges.concat([ourRange]), ourIndex), |
| {scroll: false, origin: "*mouse"}); |
| } |
| |
| var lastPos = start; |
| function extendTo(pos) { |
| if (cmp(lastPos, pos) == 0) return; |
| lastPos = pos; |
| |
| if (type == "rect") { |
| var ranges = [], tabSize = cm.options.tabSize; |
| var startCol = countColumn(getLine(doc, start.line).text, start.ch, tabSize); |
| var posCol = countColumn(getLine(doc, pos.line).text, pos.ch, tabSize); |
| var left = Math.min(startCol, posCol), right = Math.max(startCol, posCol); |
| for (var line = Math.min(start.line, pos.line), end = Math.min(cm.lastLine(), Math.max(start.line, pos.line)); |
| line <= end; line++) { |
| var text = getLine(doc, line).text, leftPos = findColumn(text, left, tabSize); |
| if (left == right) |
| ranges.push(new Range(Pos(line, leftPos), Pos(line, leftPos))); |
| else if (text.length > leftPos) |
| ranges.push(new Range(Pos(line, leftPos), Pos(line, findColumn(text, right, tabSize)))); |
| } |
| if (!ranges.length) ranges.push(new Range(start, start)); |
| setSelection(doc, normalizeSelection(startSel.ranges.slice(0, ourIndex).concat(ranges), ourIndex), sel_mouse); |
| } else { |
| var oldRange = ourRange; |
| var anchor = oldRange.anchor, head = pos; |
| if (type != "single") { |
| if (type == "double") |
| var range = findWordAt(doc, pos); |
| else |
| var range = new Range(Pos(pos.line, 0), clipPos(doc, Pos(pos.line + 1, 0))); |
| if (cmp(range.anchor, anchor) > 0) { |
| head = range.head; |
| anchor = minPos(oldRange.from(), range.anchor); |
| } else { |
| head = range.anchor; |
| anchor = maxPos(oldRange.to(), range.head); |
| } |
| } |
| var ranges = startSel.ranges.slice(0); |
| ranges[ourIndex] = new Range(clipPos(doc, anchor), head); |
| setSelection(doc, normalizeSelection(ranges, ourIndex), sel_mouse); |
| } |
| } |
| |
| var editorSize = display.wrapper.getBoundingClientRect(); |
| // Used to ensure timeout re-tries don't fire when another extend |
| // happened in the meantime (clearTimeout isn't reliable -- at |
| // least on Chrome, the timeouts still happen even when cleared, |
| // if the clear happens after their scheduled firing time). |
| var counter = 0; |
| |
| function extend(e) { |
| var curCount = ++counter; |
| var cur = posFromMouse(cm, e, true, type == "rect"); |
| if (!cur) return; |
| if (cmp(cur, lastPos) != 0) { |
| ensureFocus(cm); |
| extendTo(cur); |
| var visible = visibleLines(display, doc); |
| if (cur.line >= visible.to || cur.line < visible.from) |
| setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150); |
| } else { |
| var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0; |
| if (outside) setTimeout(operation(cm, function() { |
| if (counter != curCount) return; |
| display.scroller.scrollTop += outside; |
| extend(e); |
| }), 50); |
| } |
| } |
| |
| function done(e) { |
| counter = Infinity; |
| e_preventDefault(e); |
| focusInput(cm); |
| off(document, "mousemove", move); |
| off(document, "mouseup", up); |
| doc.history.lastSelOrigin = null; |
| } |
| |
| var move = operation(cm, function(e) { |
| if ((ie && !ie_upto9) ? !e.buttons : !e_button(e)) done(e); |
| else extend(e); |
| }); |
| var up = operation(cm, done); |
| on(document, "mousemove", move); |
| on(document, "mouseup", up); |
| } |
| |
| // Determines whether an event happened in the gutter, and fires the |
| // handlers for the corresponding event. |
| function gutterEvent(cm, e, type, prevent, signalfn) { |
| try { var mX = e.clientX, mY = e.clientY; } |
| catch(e) { return false; } |
| if (mX >= Math.floor(cm.display.gutters.getBoundingClientRect().right)) return false; |
| if (prevent) e_preventDefault(e); |
| |
| var display = cm.display; |
| var lineBox = display.lineDiv.getBoundingClientRect(); |
| |
| if (mY > lineBox.bottom || !hasHandler(cm, type)) return e_defaultPrevented(e); |
| mY -= lineBox.top - display.viewOffset; |
| |
| for (var i = 0; i < cm.options.gutters.length; ++i) { |
| var g = display.gutters.childNodes[i]; |
| if (g && g.getBoundingClientRect().right >= mX) { |
| var line = lineAtHeight(cm.doc, mY); |
| var gutter = cm.options.gutters[i]; |
| signalfn(cm, type, cm, line, gutter, e); |
| return e_defaultPrevented(e); |
| } |
| } |
| } |
| |
| function clickInGutter(cm, e) { |
| return gutterEvent(cm, e, "gutterClick", true, signalLater); |
| } |
| |
| // Kludge to work around strange IE behavior where it'll sometimes |
| // re-fire a series of drag-related events right after the drop (#1551) |
| var lastDrop = 0; |
| |
| function onDrop(e) { |
| var cm = this; |
| if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) |
| return; |
| e_preventDefault(e); |
| if (ie) lastDrop = +new Date; |
| var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files; |
| if (!pos || isReadOnly(cm)) return; |
| // Might be a file drop, in which case we simply extract the text |
| // and insert it. |
| if (files && files.length && window.FileReader && window.File) { |
| var n = files.length, text = Array(n), read = 0; |
| var loadFile = function(file, i) { |
| var reader = new FileReader; |
| reader.onload = operation(cm, function() { |
| text[i] = reader.result; |
| if (++read == n) { |
| pos = clipPos(cm.doc, pos); |
| var change = {from: pos, to: pos, text: splitLines(text.join("\n")), origin: "paste"}; |
| makeChange(cm.doc, change); |
| setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change))); |
| } |
| }); |
| reader.readAsText(file); |
| }; |
| for (var i = 0; i < n; ++i) loadFile(files[i], i); |
| } else { // Normal drop |
| // Don't do a replace if the drop happened inside of the selected text. |
| if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) { |
| cm.state.draggingText(e); |
| // Ensure the editor is re-focused |
| setTimeout(bind(focusInput, cm), 20); |
| return; |
| } |
| try { |
| var text = e.dataTransfer.getData("Text"); |
| if (text) { |
| var selected = cm.state.draggingText && cm.listSelections(); |
| setSelectionNoUndo(cm.doc, simpleSelection(pos, pos)); |
| if (selected) for (var i = 0; i < selected.length; ++i) |
| replaceRange(cm.doc, "", selected[i].anchor, selected[i].head, "drag"); |
| cm.replaceSelection(text, "around", "paste"); |
| focusInput(cm); |
| } |
| } |
| catch(e){} |
| } |
| } |
| |
| function onDragStart(cm, e) { |
| if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; } |
| if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; |
| |
| e.dataTransfer.setData("Text", cm.getSelection()); |
| |
| // Use dummy image instead of default browsers image. |
| // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there. |
| if (e.dataTransfer.setDragImage && !safari) { |
| var img = elt("img", null, null, "position: fixed; left: 0; top: 0;"); |
| img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="; |
| if (presto) { |
| img.width = img.height = 1; |
| cm.display.wrapper.appendChild(img); |
| // Force a relayout, or Opera won't use our image for some obscure reason |
| img._top = img.offsetTop; |
| } |
| e.dataTransfer.setDragImage(img, 0, 0); |
| if (presto) img.parentNode.removeChild(img); |
| } |
| } |
| |
| // SCROLL EVENTS |
| |
| // Sync the scrollable area and scrollbars, ensure the viewport |
| // covers the visible area. |
| function setScrollTop(cm, val) { |
| if (Math.abs(cm.doc.scrollTop - val) < 2) return; |
| cm.doc.scrollTop = val; |
| if (!gecko) updateDisplay(cm, {top: val}); |
| if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val; |
| if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val; |
| if (gecko) updateDisplay(cm); |
| startWorker(cm, 100); |
| } |
| // Sync scroller and scrollbar, ensure the gutter elements are |
| // aligned. |
| function setScrollLeft(cm, val, isScroller) { |
| if (isScroller ? val == cm.doc.scrollLeft : Math.abs(cm.doc.scrollLeft - val) < 2) return; |
| val = Math.min(val, cm.display.scroller.scrollWidth - cm.display.scroller.clientWidth); |
| cm.doc.scrollLeft = val; |
| alignHorizontally(cm); |
| if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val; |
| if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val; |
| } |
| |
| // Since the delta values reported on mouse wheel events are |
| // unstandardized between browsers and even browser versions, and |
| // generally horribly unpredictable, this code starts by measuring |
| // the scroll effect that the first few mouse wheel events have, |
| // and, from that, detects the way it can convert deltas to pixel |
| // offsets afterwards. |
| // |
| // The reason we want to know the amount a wheel event will scroll |
| // is that it gives us a chance to update the display before the |
| // actual scrolling happens, reducing flickering. |
| |
| var wheelSamples = 0, wheelPixelsPerUnit = null; |
| // Fill in a browser-detected starting value on browsers where we |
| // know one. These don't have to be accurate -- the result of them |
| // being wrong would just be a slight flicker on the first wheel |
| // scroll (if it is large enough). |
| if (ie) wheelPixelsPerUnit = -.53; |
| else if (gecko) wheelPixelsPerUnit = 15; |
| else if (chrome) wheelPixelsPerUnit = -.7; |
| else if (safari) wheelPixelsPerUnit = -1/3; |
| |
| function onScrollWheel(cm, e) { |
| var dx = e.wheelDeltaX, dy = e.wheelDeltaY; |
| if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail; |
| if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail; |
| else if (dy == null) dy = e.wheelDelta; |
| |
| var display = cm.display, scroll = display.scroller; |
| // Quit if there's nothing to scroll here |
| if (!(dx && scroll.scrollWidth > scroll.clientWidth || |
| dy && scroll.scrollHeight > scroll.clientHeight)) return; |
| |
| // Webkit browsers on OS X abort momentum scrolls when the target |
| // of the scroll event is removed from the scrollable element. |
| // This hack (see related code in patchDisplay) makes sure the |
| // element is kept around. |
| if (dy && mac && webkit) { |
| outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) { |
| for (var i = 0; i < view.length; i++) { |
| if (view[i].node == cur) { |
| cm.display.currentWheelTarget = cur; |
| break outer; |
| } |
| } |
| } |
| } |
| |
| // On some browsers, horizontal scrolling will cause redraws to |
| // happen before the gutter has been realigned, causing it to |
| // wriggle around in a most unseemly way. When we have an |
| // estimated pixels/delta value, we just handle horizontal |
| // scrolling entirely here. It'll be slightly off from native, but |
| // better than glitching out. |
| if (dx && !gecko && !presto && wheelPixelsPerUnit != null) { |
| if (dy) |
| setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight))); |
| setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth))); |
| e_preventDefault(e); |
| display.wheelStartX = null; // Abort measurement, if in progress |
| return; |
| } |
| |
| // 'Project' the visible viewport to cover the area that is being |
| // scrolled into view (if we know enough to estimate it). |
| if (dy && wheelPixelsPerUnit != null) { |
| var pixels = dy * wheelPixelsPerUnit; |
| var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight; |
| if (pixels < 0) top = Math.max(0, top + pixels - 50); |
| else bot = Math.min(cm.doc.height, bot + pixels + 50); |
| updateDisplay(cm, {top: top, bottom: bot}); |
| } |
| |
| if (wheelSamples < 20) { |
| if (display.wheelStartX == null) { |
| display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop; |
| display.wheelDX = dx; display.wheelDY = dy; |
| setTimeout(function() { |
| if (display.wheelStartX == null) return; |
| var movedX = scroll.scrollLeft - display.wheelStartX; |
| var movedY = scroll.scrollTop - display.wheelStartY; |
| var sample = (movedY && display.wheelDY && movedY / display.wheelDY) || |
| (movedX && display.wheelDX && movedX / display.wheelDX); |
| display.wheelStartX = display.wheelStartY = null; |
| if (!sample) return; |
| wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1); |
| ++wheelSamples; |
| }, 200); |
| } else { |
| display.wheelDX += dx; display.wheelDY += dy; |
| } |
| } |
| } |
| |
| // KEY EVENTS |
| |
| // Run a handler that was bound to a key. |
| function doHandleBinding(cm, bound, dropShift) { |
| if (typeof bound == "string") { |
| bound = commands[bound]; |
| if (!bound) return false; |
| } |
| // Ensure previous input has been read, so that the handler sees a |
| // consistent view of the document |
| if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false; |
| var prevShift = cm.display.shift, done = false; |
| try { |
| if (isReadOnly(cm)) cm.state.suppressEdits = true; |
| if (dropShift) cm.display.shift = false; |
| done = bound(cm) != Pass; |
| } finally { |
| cm.display.shift = prevShift; |
| cm.state.suppressEdits = false; |
| } |
| return done; |
| } |
| |
| // Collect the currently active keymaps. |
| function allKeyMaps(cm) { |
| var maps = cm.state.keyMaps.slice(0); |
| if (cm.options.extraKeys) maps.push(cm.options.extraKeys); |
| maps.push(cm.options.keyMap); |
| return maps; |
| } |
| |
| var maybeTransition; |
| // Handle a key from the keydown event. |
| function handleKeyBinding(cm, e) { |
| // Handle automatic keymap transitions |
| var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto; |
| clearTimeout(maybeTransition); |
| if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() { |
| if (getKeyMap(cm.options.keyMap) == startMap) { |
| cm.options.keyMap = (next.call ? next.call(null, cm) : next); |
| keyMapChanged(cm); |
| } |
| }, 50); |
| |
| var name = keyName(e, true), handled = false; |
| if (!name) return false; |
| var keymaps = allKeyMaps(cm); |
| |
| if (e.shiftKey) { |
| // First try to resolve full name (including 'Shift-'). Failing |
| // that, see if there is a cursor-motion command (starting with |
| // 'go') bound to the keyname without 'Shift-'. |
| handled = lookupKey("Shift-" + name, keymaps, function(b) {return doHandleBinding(cm, b, true);}) |
| || lookupKey(name, keymaps, function(b) { |
| if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion) |
| return doHandleBinding(cm, b); |
| }); |
| } else { |
| handled = lookupKey(name, keymaps, function(b) { return doHandleBinding(cm, b); }); |
| } |
| |
| if (handled) { |
| e_preventDefault(e); |
| restartBlink(cm); |
| signalLater(cm, "keyHandled", cm, name, e); |
| } |
| return handled; |
| } |
| |
| // Handle a key from the keypress event |
| function handleCharBinding(cm, e, ch) { |
| var handled = lookupKey("'" + ch + "'", allKeyMaps(cm), |
| function(b) { return doHandleBinding(cm, b, true); }); |
| if (handled) { |
| e_preventDefault(e); |
| restartBlink(cm); |
| signalLater(cm, "keyHandled", cm, "'" + ch + "'", e); |
| } |
| return handled; |
| } |
| |
| var lastStoppedKey = null; |
| function onKeyDown(e) { |
| var cm = this; |
| ensureFocus(cm); |
| if (signalDOMEvent(cm, e)) return; |
| // IE does strange things with escape. |
| if (ie_upto10 && e.keyCode == 27) e.returnValue = false; |
| var code = e.keyCode; |
| cm.display.shift = code == 16 || e.shiftKey; |
| var handled = handleKeyBinding(cm, e); |
| if (presto) { |
| lastStoppedKey = handled ? code : null; |
| // Opera has no cut event... we try to at least catch the key combo |
| if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey)) |
| cm.replaceSelection("", null, "cut"); |
| } |
| |
| // Turn mouse into crosshair when Alt is held on Mac. |
| if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className)) |
| showCrossHair(cm); |
| } |
| |
| function showCrossHair(cm) { |
| var lineDiv = cm.display.lineDiv; |
| addClass(lineDiv, "CodeMirror-crosshair"); |
| |
| function up(e) { |
| if (e.keyCode == 18 || !e.altKey) { |
| rmClass(lineDiv, "CodeMirror-crosshair"); |
| off(document, "keyup", up); |
| off(document, "mouseover", up); |
| } |
| } |
| on(document, "keyup", up); |
| on(document, "mouseover", up); |
| } |
| |
| function onKeyUp(e) { |
| if (signalDOMEvent(this, e)) return; |
| if (e.keyCode == 16) this.doc.sel.shift = false; |
| } |
| |
| function onKeyPress(e) { |
| var cm = this; |
| if (signalDOMEvent(cm, e)) return; |
| var keyCode = e.keyCode, charCode = e.charCode; |
| if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;} |
| if (((presto && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return; |
| var ch = String.fromCharCode(charCode == null ? keyCode : charCode); |
| if (handleCharBinding(cm, e, ch)) return; |
| if (ie && !ie_upto8) cm.display.inputHasSelection = null; |
| fastPoll(cm); |
| } |
| |
| // FOCUS/BLUR EVENTS |
| |
| function onFocus(cm) { |
| if (cm.options.readOnly == "nocursor") return; |
| if (!cm.state.focused) { |
| signal(cm, "focus", cm); |
| cm.state.focused = true; |
| addClass(cm.display.wrapper, "CodeMirror-focused"); |
| // The prevInput test prevents this from firing when a context |
| // menu is closed (since the resetInput would kill the |
| // select-all detection hack) |
| if (!cm.curOp && cm.display.selForContextMenu == cm.doc.sel) { |
| resetInput(cm); |
| if (webkit) setTimeout(bind(resetInput, cm, true), 0); // Issue #1730 |
| } |
| } |
| slowPoll(cm); |
| restartBlink(cm); |
| } |
| function onBlur(cm) { |
| if (cm.state.focused) { |
| signal(cm, "blur", cm); |
| cm.state.focused = false; |
| rmClass(cm.display.wrapper, "CodeMirror-focused"); |
| } |
| clearInterval(cm.display.blinker); |
| setTimeout(function() {if (!cm.state.focused) cm.display.shift = false;}, 150); |
| } |
| |
| // CONTEXT MENU HANDLING |
| |
| var detectingSelectAll; |
| // To make the context menu work, we need to briefly unhide the |
| // textarea (making it as unobtrusive as possible) to let the |
| // right-click take effect on it. |
| function onContextMenu(cm, e) { |
| if (signalDOMEvent(cm, e, "contextmenu")) return; |
| var display = cm.display; |
| if (eventInWidget(display, e) || contextMenuInGutter(cm, e)) return; |
| |
| var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop; |
| if (!pos || presto) return; // Opera is difficult. |
| |
| // Reset the current text selection only if the click is done outside of the selection |
| // and 'resetSelectionOnContextMenu' option is true. |
| var reset = cm.options.resetSelectionOnContextMenu; |
| if (reset && cm.doc.sel.contains(pos) == -1) |
| operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); |
| |
| var oldCSS = display.input.style.cssText; |
| display.inputDiv.style.position = "absolute"; |
| display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) + |
| "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: " + |
| (ie ? "rgba(255, 255, 255, .05)" : "transparent") + |
| "; outline: none; border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);"; |
| focusInput(cm); |
| resetInput(cm); |
| // Adds "Select all" to context menu in FF |
| if (!cm.somethingSelected()) display.input.value = display.prevInput = " "; |
| display.selForContextMenu = cm.doc.sel; |
| |
| // Select-all will be greyed out if there's nothing to select, so |
| // this adds a zero-width space so that we can later check whether |
| // it got selected. |
| function prepareSelectAllHack() { |
| if (display.input.selectionStart != null) { |
| var selected = cm.somethingSelected(); |
| var extval = display.input.value = "\u200b" + (selected ? display.input.value : ""); |
| display.prevInput = selected ? "" : "\u200b"; |
| display.input.selectionStart = 1; display.input.selectionEnd = extval.length; |
| } |
| } |
| function rehide() { |
| display.inputDiv.style.position = "relative"; |
| display.input.style.cssText = oldCSS; |
| if (ie_upto8) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos; |
| slowPoll(cm); |
| |
| // Try to detect the user choosing select-all |
| if (display.input.selectionStart != null) { |
| if (!ie || ie_upto8) prepareSelectAllHack(); |
| clearTimeout(detectingSelectAll); |
| var i = 0, poll = function() { |
| if (display.selForContextMenu == cm.doc.sel && display.input.selectionStart == 0) |
| operation(cm, commands.selectAll)(cm); |
| else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500); |
| else resetInput(cm); |
| }; |
| detectingSelectAll = setTimeout(poll, 200); |
| } |
| } |
| |
| if (ie && !ie_upto8) prepareSelectAllHack(); |
| if (captureRightClick) { |
| e_stop(e); |
| var mouseup = function() { |
| off(window, "mouseup", mouseup); |
| setTimeout(rehide, 20); |
| }; |
| on(window, "mouseup", mouseup); |
| } else { |
| setTimeout(rehide, 50); |
| } |
| } |
| |
| function contextMenuInGutter(cm, e) { |
| if (!hasHandler(cm, "gutterContextMenu")) return false; |
| return gutterEvent(cm, e, "gutterContextMenu", false, signal); |
| } |
| |
| // UPDATING |
| |
| // Compute the position of the end of a change (its 'to' property |
| // refers to the pre-change end). |
| var changeEnd = CodeMirror.changeEnd = function(change) { |
| if (!change.text) return change.to; |
| return Pos(change.from.line + change.text.length - 1, |
| lst(change.text).length + (change.text.length == 1 ? change.from.ch : 0)); |
| }; |
| |
| // Adjust a position to refer to the post-change position of the |
| // same text, or the end of the change if the change covers it. |
| function adjustForChange(pos, change) { |
| if (cmp(pos, change.from) < 0) return pos; |
| if (cmp(pos, change.to) <= 0) return changeEnd(change); |
| |
| var line = pos.line + change.text.length - (change.to.line - change.from.line) - 1, ch = pos.ch; |
| if (pos.line == change.to.line) ch += changeEnd(change).ch - change.to.ch; |
| return Pos(line, ch); |
| } |
| |
| function computeSelAfterChange(doc, change) { |
| var out = []; |
| for (var i = 0; i < doc.sel.ranges.length; i++) { |
| var range = doc.sel.ranges[i]; |
| out.push(new Range(adjustForChange(range.anchor, change), |
| adjustForChange(range.head, change))); |
| } |
| return normalizeSelection(out, doc.sel.primIndex); |
| } |
| |
| function offsetPos(pos, old, nw) { |
| if (pos.line == old.line) |
| return Pos(nw.line, pos.ch - old.ch + nw.ch); |
| else |
| return Pos(nw.line + (pos.line - old.line), pos.ch); |
| } |
| |
| // Used by replaceSelections to allow moving the selection to the |
| // start or around the replaced test. Hint may be "start" or "around". |
| function computeReplacedSel(doc, changes, hint) { |
| var out = []; |
| var oldPrev = Pos(doc.first, 0), newPrev = oldPrev; |
| for (var i = 0; i < changes.length; i++) { |
| var change = changes[i]; |
| var from = offsetPos(change.from, oldPrev, newPrev); |
| var to = offsetPos(changeEnd(change), oldPrev, newPrev); |
| oldPrev = change.to; |
| newPrev = to; |
| if (hint == "around") { |
| var range = doc.sel.ranges[i], inv = cmp(range.head, range.anchor) < 0; |
| out[i] = new Range(inv ? to : from, inv ? from : to); |
| } else { |
| out[i] = new Range(from, from); |
| } |
| } |
| return new Selection(out, doc.sel.primIndex); |
| } |
| |
| // Allow "beforeChange" event handlers to influence a change |
| function filterChange(doc, change, update) { |
| var obj = { |
| canceled: false, |
| from: change.from, |
| to: change.to, |
| text: change.text, |
| origin: change.origin, |
| cancel: function() { this.canceled = true; } |
| }; |
| if (update) obj.update = function(from, to, text, origin) { |
| if (from) this.from = clipPos(doc, from); |
| if (to) this.to = clipPos(doc, to); |
| if (text) this.text = text; |
| if (origin !== undefined) this.origin = origin; |
| }; |
| signal(doc, "beforeChange", doc, obj); |
| if (doc.cm) signal(doc.cm, "beforeChange", doc.cm, obj); |
| |
| if (obj.canceled) return null; |
| return {from: obj.from, to: obj.to, text: obj.text, origin: obj.origin}; |
| } |
| |
| // Apply a change to a document, and add it to the document's |
| // history, and propagating it to all linked documents. |
| function makeChange(doc, change, ignoreReadOnly) { |
| if (doc.cm) { |
| if (!doc.cm.curOp) return operation(doc.cm, makeChange)(doc, change, ignoreReadOnly); |
| if (doc.cm.state.suppressEdits) return; |
| } |
| |
| if (hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange")) { |
| change = filterChange(doc, change, true); |
| if (!change) return; |
| } |
| |
| // Possibly split or suppress the update based on the presence |
| // of read-only spans in its range. |
| var split = sawReadOnlySpans && !ignoreReadOnly && removeReadOnlyRanges(doc, change.from, change.to); |
| if (split) { |
| for (var i = split.length - 1; i >= 0; --i) |
| makeChangeInner(doc, {from: split[i].from, to: split[i].to, text: i ? [""] : change.text}); |
| } else { |
| makeChangeInner(doc, change); |
| } |
| } |
| |
| function makeChangeInner(doc, change) { |
| if (change.text.length == 1 && change.text[0] == "" && cmp(change.from, change.to) == 0) return; |
| var selAfter = computeSelAfterChange(doc, change); |
| addChangeToHistory(doc, change, selAfter, doc.cm ? doc.cm.curOp.id : NaN); |
| |
| makeChangeSingleDoc(doc, change, selAfter, stretchSpansOverChange(doc, change)); |
| var rebased = []; |
| |
| linkedDocs(doc, function(doc, sharedHist) { |
| if (!sharedHist && indexOf(rebased, doc.history) == -1) { |
| rebaseHist(doc.history, change); |
| rebased.push(doc.history); |
| } |
| makeChangeSingleDoc(doc, change, null, stretchSpansOverChange(doc, change)); |
| }); |
| } |
| |
| // Revert a change stored in a document's history. |
| function makeChangeFromHistory(doc, type, allowSelectionOnly) { |
| if (doc.cm && doc.cm.state.suppressEdits) return; |
| |
| var hist = doc.history, event, selAfter = doc.sel; |
| var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done; |
| |
| // Verify that there is a useable event (so that ctrl-z won't |
| // needlessly clear selection events) |
| for (var i = 0; i < source.length; i++) { |
| event = source[i]; |
| if (allowSelectionOnly ? event.ranges && !event.equals(doc.sel) : !event.ranges) |
| break; |
| } |
| if (i == source.length) return; |
| hist.lastOrigin = hist.lastSelOrigin = null; |
| |
| for (;;) { |
| event = source.pop(); |
| if (event.ranges) { |
| pushSelectionToHistory(event, dest); |
| if (allowSelectionOnly && !event.equals(doc.sel)) { |
| setSelection(doc, event, {clearRedo: false}); |
| return; |
| } |
| selAfter = event; |
| } |
| else break; |
| } |
| |
| // Build up a reverse change object to add to the opposite history |
| // stack (redo when undoing, and vice versa). |
| var antiChanges = []; |
| pushSelectionToHistory(selAfter, dest); |
| dest.push({changes: antiChanges, generation: hist.generation}); |
| hist.generation = event.generation || ++hist.maxGeneration; |
| |
| var filter = hasHandler(doc, "beforeChange") || doc.cm && hasHandler(doc.cm, "beforeChange"); |
| |
| for (var i = event.changes.length - 1; i >= 0; --i) { |
| var change = event.changes[i]; |
| change.origin = type; |
| if (filter && !filterChange(doc, change, false)) { |
| source.length = 0; |
| return; |
| } |
| |
| antiChanges.push(historyChangeFromChange(doc, change)); |
| |
| var after = i ? computeSelAfterChange(doc, change, null) : lst(source); |
| makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change)); |
| if (doc.cm) ensureCursorVisible(doc.cm); |
| var rebased = []; |
| |
| // Propagate to the linked documents |
| linkedDocs(doc, function(doc, sharedHist) { |
| if (!sharedHist && indexOf(rebased, doc.history) == -1) { |
| rebaseHist(doc.history, change); |
| rebased.push(doc.history); |
| } |
| makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change)); |
| }); |
| } |
| } |
| |
| // Sub-views need their line numbers shifted when text is added |
| // above or below them in the parent document. |
| function shiftDoc(doc, distance) { |
| doc.first += distance; |
| doc.sel = new Selection(map(doc.sel.ranges, function(range) { |
| return new Range(Pos(range.anchor.line + distance, range.anchor.ch), |
| Pos(range.head.line + distance, range.head.ch)); |
| }), doc.sel.primIndex); |
| if (doc.cm) regChange(doc.cm, doc.first, doc.first - distance, distance); |
| } |
| |
| // More lower-level change function, handling only a single document |
| // (not linked ones). |
| function makeChangeSingleDoc(doc, change, selAfter, spans) { |
| if (doc.cm && !doc.cm.curOp) |
| return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans); |
| |
| if (change.to.line < doc.first) { |
| shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line)); |
| return; |
| } |
| if (change.from.line > doc.lastLine()) return; |
| |
| // Clip the change to the size of this doc |
| if (change.from.line < doc.first) { |
| var shift = change.text.length - 1 - (doc.first - change.from.line); |
| shiftDoc(doc, shift); |
| change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch), |
| text: [lst(change.text)], origin: change.origin}; |
| } |
| var last = doc.lastLine(); |
| if (change.to.line > last) { |
| change = {from: change.from, to: Pos(last, getLine(doc, last).text.length), |
| text: [change.text[0]], origin: change.origin}; |
| } |
| |
| change.removed = getBetween(doc, change.from, change.to); |
| |
| if (!selAfter) selAfter = computeSelAfterChange(doc, change, null); |
| if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans); |
| else updateDoc(doc, change, spans); |
| setSelectionNoUndo(doc, selAfter, sel_dontScroll); |
| } |
| |
| // Handle the interaction of a change to a document with the editor |
| // that this document is part of. |
| function makeChangeSingleDocInEditor(cm, change, spans) { |
| var doc = cm.doc, display = cm.display, from = change.from, to = change.to; |
| |
| var recomputeMaxLength = false, checkWidthStart = from.line; |
| if (!cm.options.lineWrapping) { |
| checkWidthStart = lineNo(visualLine(getLine(doc, from.line))); |
| doc.iter(checkWidthStart, to.line + 1, function(line) { |
| if (line == display.maxLine) { |
| recomputeMaxLength = true; |
| return true; |
| } |
| }); |
| } |
| |
| if (doc.sel.contains(change.from, change.to) > -1) |
| signalCursorActivity(cm); |
| |
| updateDoc(doc, change, spans, estimateHeight(cm)); |
| |
| if (!cm.options.lineWrapping) { |
| doc.iter(checkWidthStart, from.line + change.text.length, function(line) { |
| var len = lineLength(line); |
| if (len > display.maxLineLength) { |
| display.maxLine = line; |
| display.maxLineLength = len; |
| display.maxLineChanged = true; |
| recomputeMaxLength = false; |
| } |
| }); |
| if (recomputeMaxLength) cm.curOp.updateMaxLine = true; |
| } |
| |
| // Adjust frontier, schedule worker |
| doc.frontier = Math.min(doc.frontier, from.line); |
| startWorker(cm, 400); |
| |
| var lendiff = change.text.length - (to.line - from.line) - 1; |
| // Remember that these lines changed, for updating the display |
| if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change)) |
| regLineChange(cm, from.line, "text"); |
| else |
| regChange(cm, from.line, to.line + 1, lendiff); |
| |
| var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change"); |
| if (changeHandler || changesHandler) { |
| var obj = { |
| from: from, to: to, |
| text: change.text, |
| removed: change.removed, |
| origin: change.origin |
| }; |
| if (changeHandler) signalLater(cm, "change", cm, obj); |
| if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); |
| } |
| } |
| |
| function replaceRange(doc, code, from, to, origin) { |
| if (!to) to = from; |
| if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; } |
| if (typeof code == "string") code = splitLines(code); |
| makeChange(doc, {from: from, to: to, text: code, origin: origin}); |
| } |
| |
| // SCROLLING THINGS INTO VIEW |
| |
| // If an editor sits on the top or bottom of the window, partially |
| // scrolled out of view, this ensures that the cursor is visible. |
| function maybeScrollWindow(cm, coords) { |
| var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null; |
| if (coords.top + box.top < 0) doScroll = true; |
| else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false; |
| if (doScroll != null && !phantom) { |
| var scrollNode = elt("div", "\u200b", null, "position: absolute; top: " + |
| (coords.top - display.viewOffset - paddingTop(cm.display)) + "px; height: " + |
| (coords.bottom - coords.top + scrollerCutOff) + "px; left: " + |
| coords.left + "px; width: 2px;"); |
| cm.display.lineSpace.appendChild(scrollNode); |
| scrollNode.scrollIntoView(doScroll); |
| cm.display.lineSpace.removeChild(scrollNode); |
| } |
| } |
| |
| // Scroll a given position into view (immediately), verifying that |
| // it actually became visible (as line heights are accurately |
| // measured, the position of something may 'drift' during drawing). |
| function scrollPosIntoView(cm, pos, end, margin) { |
| if (margin == null) margin = 0; |
| for (;;) { |
| var changed = false, coords = cursorCoords(cm, pos); |
| var endCoords = !end || end == pos ? coords : cursorCoords(cm, end); |
| var scrollPos = calculateScrollPos(cm, Math.min(coords.left, endCoords.left), |
| Math.min(coords.top, endCoords.top) - margin, |
| Math.max(coords.left, endCoords.left), |
| Math.max(coords.bottom, endCoords.bottom) + margin); |
| var startTop = cm.doc.scrollTop, startLeft = cm.doc.scrollLeft; |
| if (scrollPos.scrollTop != null) { |
| setScrollTop(cm, scrollPos.scrollTop); |
| if (Math.abs(cm.doc.scrollTop - startTop) > 1) changed = true; |
| } |
| if (scrollPos.scrollLeft != null) { |
| setScrollLeft(cm, scrollPos.scrollLeft); |
| if (Math.abs(cm.doc.scrollLeft - startLeft) > 1) changed = true; |
| } |
| if (!changed) return coords; |
| } |
| } |
| |
| // Scroll a given set of coordinates into view (immediately). |
| function scrollIntoView(cm, x1, y1, x2, y2) { |
| var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2); |
| if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop); |
| if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft); |
| } |
| |
| // Calculate a new scroll position needed to scroll the given |
| // rectangle into view. Returns an object with scrollTop and |
| // scrollLeft properties. When these are undefined, the |
| // vertical/horizontal position does not need to be adjusted. |
| function calculateScrollPos(cm, x1, y1, x2, y2) { |
| var display = cm.display, snapMargin = textHeight(cm.display); |
| if (y1 < 0) y1 = 0; |
| var screentop = cm.curOp && cm.curOp.scrollTop != null ? cm.curOp.scrollTop : display.scroller.scrollTop; |
| var screen = display.scroller.clientHeight - scrollerCutOff, result = {}; |
| var docBottom = cm.doc.height + paddingVert(display); |
| var atTop = y1 < snapMargin, atBottom = y2 > docBottom - snapMargin; |
| if (y1 < screentop) { |
| result.scrollTop = atTop ? 0 : y1; |
| } else if (y2 > screentop + screen) { |
| var newTop = Math.min(y1, (atBottom ? docBottom : y2) - screen); |
| if (newTop != screentop) result.scrollTop = newTop; |
| } |
| |
| var screenleft = cm.curOp && cm.curOp.scrollLeft != null ? cm.curOp.scrollLeft : display.scroller.scrollLeft; |
| var screenw = display.scroller.clientWidth - scrollerCutOff; |
| x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth; |
| var gutterw = display.gutters.offsetWidth; |
| var atLeft = x1 < gutterw + 10; |
| if (x1 < screenleft + gutterw || atLeft) { |
| if (atLeft) x1 = 0; |
| result.scrollLeft = Math.max(0, x1 - 10 - gutterw); |
| } else if (x2 > screenw + screenleft - 3) { |
| result.scrollLeft = x2 + 10 - screenw; |
| } |
| return result; |
| } |
| |
| // Store a relative adjustment to the scroll position in the current |
| // operation (to be applied when the operation finishes). |
| function addToScrollPos(cm, left, top) { |
| if (left != null || top != null) resolveScrollToPos(cm); |
| if (left != null) |
| cm.curOp.scrollLeft = (cm.curOp.scrollLeft == null ? cm.doc.scrollLeft : cm.curOp.scrollLeft) + left; |
| if (top != null) |
| cm.curOp.scrollTop = (cm.curOp.scrollTop == null ? cm.doc.scrollTop : cm.curOp.scrollTop) + top; |
| } |
| |
| // Make sure that at the end of the operation the current cursor is |
| // shown. |
| function ensureCursorVisible(cm) { |
| resolveScrollToPos(cm); |
| var cur = cm.getCursor(), from = cur, to = cur; |
| if (!cm.options.lineWrapping) { |
| from = cur.ch ? Pos(cur.line, cur.ch - 1) : cur; |
| to = Pos(cur.line, cur.ch + 1); |
| } |
| cm.curOp.scrollToPos = {from: from, to: to, margin: cm.options.cursorScrollMargin, isCursor: true}; |
| } |
| |
| // When an operation has its scrollToPos property set, and another |
| // scroll action is applied before the end of the operation, this |
| // 'simulates' scrolling that position into view in a cheap way, so |
| // that the effect of intermediate scroll commands is not ignored. |
| function resolveScrollToPos(cm) { |
| var range = cm.curOp.scrollToPos; |
| if (range) { |
| cm.curOp.scrollToPos = null; |
| var from = estimateCoords(cm, range.from), to = estimateCoords(cm, range.to); |
| var sPos = calculateScrollPos(cm, Math.min(from.left, to.left), |
| Math.min(from.top, to.top) - range.margin, |
| Math.max(from.right, to.right), |
| Math.max(from.bottom, to.bottom) + range.margin); |
| cm.scrollTo(sPos.scrollLeft, sPos.scrollTop); |
| } |
| } |
| |
| // API UTILITIES |
| |
| // Indent the given line. The how parameter can be "smart", |
| // "add"/null, "subtract", or "prev". When aggressive is false |
| // (typically set to true for forced single-line indents), empty |
| // lines are not indented, and places where the mode returns Pass |
| // are left alone. |
| function indentLine(cm, n, how, aggressive) { |
| var doc = cm.doc, state; |
| if (how == null) how = "add"; |
| if (how == "smart") { |
| // Fall back to "prev" when the mode doesn't have an indentation |
| // method. |
| if (!cm.doc.mode.indent) how = "prev"; |
| else state = getStateBefore(cm, n); |
| } |
| |
| var tabSize = cm.options.tabSize; |
| var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize); |
| if (line.stateAfter) line.stateAfter = null; |
| var curSpaceString = line.text.match(/^\s*/)[0], indentation; |
| if (!aggressive && !/\S/.test(line.text)) { |
| indentation = 0; |
| how = "not"; |
| } else if (how == "smart") { |
| indentation = cm.doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text); |
| if (indentation == Pass) { |
| if (!aggressive) return; |
| how = "prev"; |
| } |
| } |
| if (how == "prev") { |
| if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize); |
| else indentation = 0; |
| } else if (how == "add") { |
| indentation = curSpace + cm.options.indentUnit; |
| } else if (how == "subtract") { |
| indentation = curSpace - cm.options.indentUnit; |
| } else if (typeof how == "number") { |
| indentation = curSpace + how; |
| } |
| indentation = Math.max(0, indentation); |
| |
| var indentString = "", pos = 0; |
| if (cm.options.indentWithTabs) |
| for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} |
| if (pos < indentation) indentString += spaceStr(indentation - pos); |
| |
| if (indentString != curSpaceString) { |
| replaceRange(cm.doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input"); |
| } else { |
| // Ensure that, if the cursor was in the whitespace at the start |
| // of the line, it is moved to the end of that space. |
| for (var i = 0; i < doc.sel.ranges.length; i++) { |
| var range = doc.sel.ranges[i]; |
| if (range.head.line == n && range.head.ch < curSpaceString.length) { |
| var pos = Pos(n, curSpaceString.length); |
| replaceOneSelection(doc, i, new Range(pos, pos)); |
| break; |
| } |
| } |
| } |
| line.stateAfter = null; |
| } |
| |
| // Utility for applying a change to a line by handle or number, |
| // returning the number and optionally registering the line as |
| // changed. |
| function changeLine(cm, handle, changeType, op) { |
| var no = handle, line = handle, doc = cm.doc; |
| if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle)); |
| else no = lineNo(handle); |
| if (no == null) return null; |
| if (op(line, no)) regLineChange(cm, no, changeType); |
| return line; |
| } |
| |
| // Helper for deleting text near the selection(s), used to implement |
| // backspace, delete, and similar functionality. |
| function deleteNearSelection(cm, compute) { |
| var ranges = cm.doc.sel.ranges, kill = []; |
| // Build up a set of ranges to kill first, merging overlapping |
| // ranges. |
| for (var i = 0; i < ranges.length; i++) { |
| var toKill = compute(ranges[i]); |
| while (kill.length && cmp(toKill.from, lst(kill).to) <= 0) { |
| var replaced = kill.pop(); |
| if (cmp(replaced.from, toKill.from) < 0) { |
| toKill.from = replaced.from; |
| break; |
| } |
| } |
| kill.push(toKill); |
| } |
| // Next, remove those actual ranges. |
| runInOp(cm, function() { |
| for (var i = kill.length - 1; i >= 0; i--) |
| replaceRange(cm.doc, "", kill[i].from, kill[i].to, "+delete"); |
| ensureCursorVisible(cm); |
| }); |
| } |
| |
| // Used for horizontal relative motion. Dir is -1 or 1 (left or |
| // right), unit can be "char", "column" (like char, but doesn't |
| // cross line boundaries), "word" (across next word), or "group" (to |
| // the start of next group of word or non-word-non-whitespace |
| // chars). The visually param controls whether, in right-to-left |
| // text, direction 1 means to move towards the next index in the |
| // string, or towards the character to the right of the current |
| // position. The resulting position will have a hitSide=true |
| // property if it reached the end of the document. |
| function findPosH(doc, pos, dir, unit, visually) { |
| var line = pos.line, ch = pos.ch, origDir = dir; |
| var lineObj = getLine(doc, line); |
| var possible = true; |
| function findNextLine() { |
| var l = line + dir; |
| if (l < doc.first || l >= doc.first + doc.size) return (possible = false); |
| line = l; |
| return lineObj = getLine(doc, l); |
| } |
| function moveOnce(boundToLine) { |
| var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true); |
| if (next == null) { |
| if (!boundToLine && findNextLine()) { |
| if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj); |
| else ch = dir < 0 ? lineObj.text.length : 0; |
| } else return (possible = false); |
| } else ch = next; |
| return true; |
| } |
| |
| if (unit == "char") moveOnce(); |
| else if (unit == "column") moveOnce(true); |
| else if (unit == "word" || unit == "group") { |
| var sawType = null, group = unit == "group"; |
| for (var first = true;; first = false) { |
| if (dir < 0 && !moveOnce(!first)) break; |
| var cur = lineObj.text.charAt(ch) || "\n"; |
| var type = isWordChar(cur) ? "w" |
| : group && cur == "\n" ? "n" |
| : !group || /\s/.test(cur) ? null |
| : "p"; |
| if (group && !first && !type) type = "s"; |
| if (sawType && sawType != type) { |
| if (dir < 0) {dir = 1; moveOnce();} |
| break; |
| } |
| |
| if (type) sawType = type; |
| if (dir > 0 && !moveOnce(!first)) break; |
| } |
| } |
| var result = skipAtomic(doc, Pos(line, ch), origDir, true); |
| if (!possible) result.hitSide = true; |
| return result; |
| } |
| |
| // For relative vertical movement. Dir may be -1 or 1. Unit can be |
| // "page" or "line". The resulting position will have a hitSide=true |
| // property if it reached the end of the document. |
| function findPosV(cm, pos, dir, unit) { |
| var doc = cm.doc, x = pos.left, y; |
| if (unit == "page") { |
| var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight); |
| y = pos.top + dir * (pageSize - (dir < 0 ? 1.5 : .5) * textHeight(cm.display)); |
| } else if (unit == "line") { |
| y = dir > 0 ? pos.bottom + 3 : pos.top - 3; |
| } |
| for (;;) { |
| var target = coordsChar(cm, x, y); |
| if (!target.outside) break; |
| if (dir < 0 ? y <= 0 : y >= doc.height) { target.hitSide = true; break; } |
| y += dir * 5; |
| } |
| return target; |
| } |
| |
| // Find the word at the given position (as returned by coordsChar). |
| function findWordAt(doc, pos) { |
| var line = getLine(doc, pos.line).text; |
| var start = pos.ch, end = pos.ch; |
| if (line) { |
| if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end; |
| var startChar = line.charAt(start); |
| var check = isWordChar(startChar) ? isWordChar |
| : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} |
| : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);}; |
| while (start > 0 && check(line.charAt(start - 1))) --start; |
| while (end < line.length && check(line.charAt(end))) ++end; |
| } |
| return new Range(Pos(pos.line, start), Pos(pos.line, end)); |
| } |
| |
| // EDITOR METHODS |
| |
| // The publicly visible API. Note that methodOp(f) means |
| // 'wrap f in an operation, performed on its `this` parameter'. |
| |
| // This is not the complete set of editor methods. Most of the |
| // methods defined on the Doc type are also injected into |
| // CodeMirror.prototype, for backwards compatibility and |
| // convenience. |
| |
| CodeMirror.prototype = { |
| constructor: CodeMirror, |
| focus: function(){window.focus(); focusInput(this); fastPoll(this);}, |
| |
| setOption: function(option, value) { |
| var options = this.options, old = options[option]; |
| if (options[option] == value && option != "mode") return; |
| options[option] = value; |
| if (optionHandlers.hasOwnProperty(option)) |
| operation(this, optionHandlers[option])(this, value, old); |
| }, |
| |
| getOption: function(option) {return this.options[option];}, |
| getDoc: function() {return this.doc;}, |
| |
| addKeyMap: function(map, bottom) { |
| this.state.keyMaps[bottom ? "push" : "unshift"](map); |
| }, |
| removeKeyMap: function(map) { |
| var maps = this.state.keyMaps; |
| for (var i = 0; i < maps.length; ++i) |
| if (maps[i] == map || (typeof maps[i] != "string" && maps[i].name == map)) { |
| maps.splice(i, 1); |
| return true; |
| } |
| }, |
| |
| addOverlay: methodOp(function(spec, options) { |
| var mode = spec.token ? spec : CodeMirror.getMode(this.options, spec); |
| if (mode.startState) throw new Error("Overlays may not be stateful."); |
| this.state.overlays.push({mode: mode, modeSpec: spec, opaque: options && options.opaque}); |
| this.state.modeGen++; |
| regChange(this); |
| }), |
| removeOverlay: methodOp(function(spec) { |
| var overlays = this.state.overlays; |
| for (var i = 0; i < overlays.length; ++i) { |
| var cur = overlays[i].modeSpec; |
| if (cur == spec || typeof spec == "string" && cur.name == spec) { |
| overlays.splice(i, 1); |
| this.state.modeGen++; |
| regChange(this); |
| return; |
| } |
| } |
| }), |
| |
| indentLine: methodOp(function(n, dir, aggressive) { |
| if (typeof dir != "string" && typeof dir != "number") { |
| if (dir == null) dir = this.options.smartIndent ? "smart" : "prev"; |
| else dir = dir ? "add" : "subtract"; |
| } |
| if (isLine(this.doc, n)) indentLine(this, n, dir, aggressive); |
| }), |
| indentSelection: methodOp(function(how) { |
| var ranges = this.doc.sel.ranges, end = -1; |
| for (var i = 0; i < ranges.length; i++) { |
| var range = ranges[i]; |
| if (!range.empty()) { |
| var start = Math.max(end, range.from().line); |
| var to = range.to(); |
| end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1; |
| for (var j = start; j < end; ++j) |
| indentLine(this, j, how); |
| } else if (range.head.line > end) { |
| indentLine(this, range.head.line, how, true); |
| end = range.head.line; |
| if (i == this.doc.sel.primIndex) ensureCursorVisible(this); |
| } |
| } |
| }), |
| |
| // Fetch the parser token for a given character. Useful for hacks |
| // that want to inspect the mode state (say, for completion). |
| getTokenAt: function(pos, precise) { |
| var doc = this.doc; |
| pos = clipPos(doc, pos); |
| var state = getStateBefore(this, pos.line, precise), mode = this.doc.mode; |
| var line = getLine(doc, pos.line); |
| var stream = new StringStream(line.text, this.options.tabSize); |
| while (stream.pos < pos.ch && !stream.eol()) { |
| stream.start = stream.pos; |
| var style = readToken(mode, stream, state); |
| } |
| return {start: stream.start, |
| end: stream.pos, |
| string: stream.current(), |
| type: style || null, |
| state: state}; |
| }, |
| |
| getTokenTypeAt: function(pos) { |
| pos = clipPos(this.doc, pos); |
| var styles = getLineStyles(this, getLine(this.doc, pos.line)); |
| var before = 0, after = (styles.length - 1) / 2, ch = pos.ch; |
| var type; |
| if (ch == 0) type = styles[2]; |
| else for (;;) { |
| var mid = (before + after) >> 1; |
| if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid; |
| else if (styles[mid * 2 + 1] < ch) before = mid + 1; |
| else { type = styles[mid * 2 + 2]; break; } |
| } |
| var cut = type ? type.indexOf("cm-overlay ") : -1; |
| return cut < 0 ? type : cut == 0 ? null : type.slice(0, cut - 1); |
| }, |
| |
| getModeAt: function(pos) { |
| var mode = this.doc.mode; |
| if (!mode.innerMode) return mode; |
| return CodeMirror.innerMode(mode, this.getTokenAt(pos).state).mode; |
| }, |
| |
| getHelper: function(pos, type) { |
| return this.getHelpers(pos, type)[0]; |
| }, |
| |
| getHelpers: function(pos, type) { |
| var found = []; |
| if (!helpers.hasOwnProperty(type)) return helpers; |
| var help = helpers[type], mode = this.getModeAt(pos); |
| if (typeof mode[type] == "string") { |
| if (help[mode[type]]) found.push(help[mode[type]]); |
| } else if (mode[type]) { |
| for (var i = 0; i < mode[type].length; i++) { |
| var val = help[mode[type][i]]; |
| if (val) found.push(val); |
| } |
| } else if (mode.helperType && help[mode.helperType]) { |
| found.push(help[mode.helperType]); |
| } else if (help[mode.name]) { |
| found.push(help[mode.name]); |
| } |
| for (var i = 0; i < help._global.length; i++) { |
| var cur = help._global[i]; |
| if (cur.pred(mode, this) && indexOf(found, cur.val) == -1) |
| found.push(cur.val); |
| } |
| return found; |
| }, |
| |
| getStateAfter: function(line, precise) { |
| var doc = this.doc; |
| line = clipLine(doc, line == null ? doc.first + doc.size - 1: line); |
| return getStateBefore(this, line + 1, precise); |
| }, |
| |
| cursorCoords: function(start, mode) { |
| var pos, range = this.doc.sel.primary(); |
| if (start == null) pos = range.head; |
| else if (typeof start == "object") pos = clipPos(this.doc, start); |
| else pos = start ? range.from() : range.to(); |
| return cursorCoords(this, pos, mode || "page"); |
| }, |
| |
| charCoords: function(pos, mode) { |
| return charCoords(this, clipPos(this.doc, pos), mode || "page"); |
| }, |
| |
| coordsChar: function(coords, mode) { |
| coords = fromCoordSystem(this, coords, mode || "page"); |
| return coordsChar(this, coords.left, coords.top); |
| }, |
| |
| lineAtHeight: function(height, mode) { |
| height = fromCoordSystem(this, {top: height, left: 0}, mode || "page").top; |
| return lineAtHeight(this.doc, height + this.display.viewOffset); |
| }, |
| heightAtLine: function(line, mode) { |
| var end = false, last = this.doc.first + this.doc.size - 1; |
| if (line < this.doc.first) line = this.doc.first; |
| else if (line > last) { line = last; end = true; } |
| var lineObj = getLine(this.doc, line); |
| return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").top + |
| (end ? this.doc.height - heightAtLine(lineObj) : 0); |
| }, |
| |
| defaultTextHeight: function() { return textHeight(this.display); }, |
| defaultCharWidth: function() { return charWidth(this.display); }, |
| |
| setGutterMarker: methodOp(function(line, gutterID, value) { |
| return changeLine(this, line, "gutter", function(line) { |
| var markers = line.gutterMarkers || (line.gutterMarkers = {}); |
| markers[gutterID] = value; |
| if (!value && isEmpty(markers)) line.gutterMarkers = null; |
| return true; |
| }); |
| }), |
| |
| clearGutter: methodOp(function(gutterID) { |
| var cm = this, doc = cm.doc, i = doc.first; |
| doc.iter(function(line) { |
| if (line.gutterMarkers && line.gutterMarkers[gutterID]) { |
| line.gutterMarkers[gutterID] = null; |
| regLineChange(cm, i, "gutter"); |
| if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null; |
| } |
| ++i; |
| }); |
| }), |
| |
| addLineClass: methodOp(function(handle, where, cls) { |
| return changeLine(this, handle, "class", function(line) { |
| var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass"; |
| if (!line[prop]) line[prop] = cls; |
| else if (new RegExp("(?:^|\\s)" + cls + "(?:$|\\s)").test(line[prop])) return false; |
| else line[prop] += " " + cls; |
| return true; |
| }); |
| }), |
| |
| removeLineClass: methodOp(function(handle, where, cls) { |
| return changeLine(this, handle, "class", function(line) { |
| var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass"; |
| var cur = line[prop]; |
| if (!cur) return false; |
| else if (cls == null) line[prop] = null; |
| else { |
| var found = cur.match(new RegExp("(?:^|\\s+)" + cls + "(?:$|\\s+)")); |
| if (!found) return false; |
| var end = found.index + found[0].length; |
| line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null; |
| } |
| return true; |
| }); |
| }), |
| |
| addLineWidget: methodOp(function(handle, node, options) { |
| return addLineWidget(this, handle, node, options); |
| }), |
| |
| removeLineWidget: function(widget) { widget.clear(); }, |
| |
| lineInfo: function(line) { |
| if (typeof line == "number") { |
| if (!isLine(this.doc, line)) return null; |
| var n = line; |
| line = getLine(this.doc, line); |
| if (!line) return null; |
| } else { |
| var n = lineNo(line); |
| if (n == null) return null; |
| } |
| return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers, |
| textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass, |
| widgets: line.widgets}; |
| }, |
| |
| getViewport: function() { return {from: this.display.viewFrom, to: this.display.viewTo};}, |
| |
| addWidget: function(pos, node, scroll, vert, horiz) { |
| var display = this.display; |
| pos = cursorCoords(this, clipPos(this.doc, pos)); |
| var top = pos.bottom, left = pos.left; |
| node.style.position = "absolute"; |
| display.sizer.appendChild(node); |
| if (vert == "over") { |
| top = pos.top; |
| } else if (vert == "above" || vert == "near") { |
| var vspace = Math.max(display.wrapper.clientHeight, this.doc.height), |
| hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth); |
| // Default to positioning above (if specified and possible); otherwise default to positioning below |
| if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight) |
| top = pos.top - node.offsetHeight; |
| else if (pos.bottom + node.offsetHeight <= vspace) |
| top = pos.bottom; |
| if (left + node.offsetWidth > hspace) |
| left = hspace - node.offsetWidth; |
| } |
| node.style.top = top + "px"; |
| node.style.left = node.style.right = ""; |
| if (horiz == "right") { |
| left = display.sizer.clientWidth - node.offsetWidth; |
| node.style.right = "0px"; |
| } else { |
| if (horiz == "left") left = 0; |
| else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2; |
| node.style.left = left + "px"; |
| } |
| if (scroll) |
| scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight); |
| }, |
| |
| triggerOnKeyDown: methodOp(onKeyDown), |
| triggerOnKeyPress: methodOp(onKeyPress), |
| triggerOnKeyUp: methodOp(onKeyUp), |
| |
| execCommand: function(cmd) { |
| if (commands.hasOwnProperty(cmd)) |
| return commands[cmd](this); |
| }, |
| |
| findPosH: function(from, amount, unit, visually) { |
| var dir = 1; |
| if (amount < 0) { dir = -1; amount = -amount; } |
| for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { |
| cur = findPosH(this.doc, cur, dir, unit, visually); |
| if (cur.hitSide) break; |
| } |
| return cur; |
| }, |
| |
| moveH: methodOp(function(dir, unit) { |
| var cm = this; |
| cm.extendSelectionsBy(function(range) { |
| if (cm.display.shift || cm.doc.extend || range.empty()) |
| return findPosH(cm.doc, range.head, dir, unit, cm.options.rtlMoveVisually); |
| else |
| return dir < 0 ? range.from() : range.to(); |
| }, sel_move); |
| }), |
| |
| deleteH: methodOp(function(dir, unit) { |
| var sel = this.doc.sel, doc = this.doc; |
| if (sel.somethingSelected()) |
| doc.replaceSelection("", null, "+delete"); |
| else |
| deleteNearSelection(this, function(range) { |
| var other = findPosH(doc, range.head, dir, unit, false); |
| return dir < 0 ? {from: other, to: range.head} : {from: range.head, to: other}; |
| }); |
| }), |
| |
| findPosV: function(from, amount, unit, goalColumn) { |
| var dir = 1, x = goalColumn; |
| if (amount < 0) { dir = -1; amount = -amount; } |
| for (var i = 0, cur = clipPos(this.doc, from); i < amount; ++i) { |
| var coords = cursorCoords(this, cur, "div"); |
| if (x == null) x = coords.left; |
| else coords.left = x; |
| cur = findPosV(this, coords, dir, unit); |
| if (cur.hitSide) break; |
| } |
| return cur; |
| }, |
| |
| moveV: methodOp(function(dir, unit) { |
| var cm = this, doc = this.doc, goals = []; |
| var collapse = !cm.display.shift && !doc.extend && doc.sel.somethingSelected(); |
| doc.extendSelectionsBy(function(range) { |
| if (collapse) |
| return dir < 0 ? range.from() : range.to(); |
| var headPos = cursorCoords(cm, range.head, "div"); |
| if (range.goalColumn != null) headPos.left = range.goalColumn; |
| goals.push(headPos.left); |
| var pos = findPosV(cm, headPos, dir, unit); |
| if (unit == "page" && range == doc.sel.primary()) |
| addToScrollPos(cm, null, charCoords(cm, pos, "div").top - headPos.top); |
| return pos; |
| }, sel_move); |
| if (goals.length) for (var i = 0; i < doc.sel.ranges.length; i++) |
| doc.sel.ranges[i].goalColumn = goals[i]; |
| }), |
| |
| toggleOverwrite: function(value) { |
| if (value != null && value == this.state.overwrite) return; |
| if (this.state.overwrite = !this.state.overwrite) |
| addClass(this.display.cursorDiv, "CodeMirror-overwrite"); |
| else |
| rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); |
| |
| signal(this, "overwriteToggle", this, this.state.overwrite); |
| }, |
| hasFocus: function() { return activeElt() == this.display.input; }, |
| |
| scrollTo: methodOp(function(x, y) { |
| if (x != null || y != null) resolveScrollToPos(this); |
| if (x != null) this.curOp.scrollLeft = x; |
| if (y != null) this.curOp.scrollTop = y; |
| }), |
| getScrollInfo: function() { |
| var scroller = this.display.scroller, co = scrollerCutOff; |
| return {left: scroller.scrollLeft, top: scroller.scrollTop, |
| height: scroller.scrollHeight - co, width: scroller.scrollWidth - co, |
| clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co}; |
| }, |
| |
| scrollIntoView: methodOp(function(range, margin) { |
| if (range == null) { |
| range = {from: this.doc.sel.primary().head, to: null}; |
| if (margin == null) margin = this.options.cursorScrollMargin; |
| } else if (typeof range == "number") { |
| range = {from: Pos(range, 0), to: null}; |
| } else if (range.from == null) { |
| range = {from: range, to: null}; |
| } |
| if (!range.to) range.to = range.from; |
| range.margin = margin || 0; |
| |
| if (range.from.line != null) { |
| resolveScrollToPos(this); |
| this.curOp.scrollToPos = range; |
| } else { |
| var sPos = calculateScrollPos(this, Math.min(range.from.left, range.to.left), |
| Math.min(range.from.top, range.to.top) - range.margin, |
| Math.max(range.from.right, range.to.right), |
| Math.max(range.from.bottom, range.to.bottom) + range.margin); |
| this.scrollTo(sPos.scrollLeft, sPos.scrollTop); |
| } |
| }), |
| |
| setSize: methodOp(function(width, height) { |
| function interpret(val) { |
| return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; |
| } |
| if (width != null) this.display.wrapper.style.width = interpret(width); |
| if (height != null) this.display.wrapper.style.height = interpret(height); |
| if (this.options.lineWrapping) clearLineMeasurementCache(this); |
| this.curOp.forceUpdate = true; |
| signal(this, "refresh", this); |
| }), |
| |
| operation: function(f){return runInOp(this, f);}, |
| |
| refresh: methodOp(function() { |
| var oldHeight = this.display.cachedTextHeight; |
| regChange(this); |
| this.curOp.forceUpdate = true; |
| clearCaches(this); |
| this.scrollTo(this.doc.scrollLeft, this.doc.scrollTop); |
| updateGutterSpace(this); |
| if (oldHeight == null || Math.abs(oldHeight - textHeight(this.display)) > .5) |
| estimateLineHeights(this); |
| signal(this, "refresh", this); |
| }), |
| |
| swapDoc: methodOp(function(doc) { |
| var old = this.doc; |
| old.cm = null; |
| attachDoc(this, doc); |
| clearCaches(this); |
| resetInput(this); |
| this.scrollTo(doc.scrollLeft, doc.scrollTop); |
| signalLater(this, "swapDoc", this, old); |
| return old; |
| }), |
| |
| getInputField: function(){return this.display.input;}, |
| getWrapperElement: function(){return this.display.wrapper;}, |
| getScrollerElement: function(){return this.display.scroller;}, |
| getGutterElement: function(){return this.display.gutters;} |
| }; |
| eventMixin(CodeMirror); |
| |
| // OPTION DEFAULTS |
| |
| // The default configuration options. |
| var defaults = CodeMirror.defaults = {}; |
| // Functions to run when options are changed. |
| var optionHandlers = CodeMirror.optionHandlers = {}; |
| |
| function option(name, deflt, handle, notOnInit) { |
| CodeMirror.defaults[name] = deflt; |
| if (handle) optionHandlers[name] = |
| notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle; |
| } |
| |
| // Passed to option handlers when there is no old value. |
| var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}}; |
| |
| // These two are, on init, called from the constructor because they |
| // have to be initialized before the editor can start at all. |
| option("value", "", function(cm, val) { |
| cm.setValue(val); |
| }, true); |
| option("mode", null, function(cm, val) { |
| cm.doc.modeOption = val; |
| loadMode(cm); |
| }, true); |
| |
| option("indentUnit", 2, loadMode, true); |
| option("indentWithTabs", false); |
| option("smartIndent", true); |
| option("tabSize", 4, function(cm) { |
| resetModeState(cm); |
| clearCaches(cm); |
| regChange(cm); |
| }, true); |
| option("specialChars", /[\t\u0000-\u0019\u00ad\u200b\u2028\u2029\ufeff]/g, function(cm, val) { |
| cm.options.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g"); |
| cm.refresh(); |
| }, true); |
| option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true); |
| option("electricChars", true); |
| option("rtlMoveVisually", !windows); |
| option("wholeLineUpdateBefore", true); |
| |
| option("theme", "default", function(cm) { |
| themeChanged(cm); |
| guttersChanged(cm); |
| }, true); |
| option("keyMap", "default", keyMapChanged); |
| option("extraKeys", null); |
| |
| option("lineWrapping", false, wrappingChanged, true); |
| option("gutters", [], function(cm) { |
| setGuttersForLineNumbers(cm.options); |
| guttersChanged(cm); |
| }, true); |
| option("fixedGutter", true, function(cm, val) { |
| cm.display.gutters.style.left = val ? compensateForHScroll(cm.display) + "px" : "0"; |
| cm.refresh(); |
| }, true); |
| option("coverGutterNextToScrollbar", false, updateScrollbars, true); |
| option("lineNumbers", false, function(cm) { |
| setGuttersForLineNumbers(cm.options); |
| guttersChanged(cm); |
| }, true); |
| option("firstLineNumber", 1, guttersChanged, true); |
| option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true); |
| option("showCursorWhenSelecting", false, updateSelection, true); |
| |
| option("resetSelectionOnContextMenu", true); |
| |
| option("readOnly", false, function(cm, val) { |
| if (val == "nocursor") { |
| onBlur(cm); |
| cm.display.input.blur(); |
| cm.display.disabled = true; |
| } else { |
| cm.display.disabled = false; |
| if (!val) resetInput(cm); |
| } |
| }); |
| option("disableInput", false, function(cm, val) {if (!val) resetInput(cm);}, true); |
| option("dragDrop", true); |
| |
| option("cursorBlinkRate", 530); |
| option("cursorScrollMargin", 0); |
| option("cursorHeight", 1); |
| option("workTime", 100); |
| option("workDelay", 100); |
| option("flattenSpans", true, resetModeState, true); |
| option("addModeClass", false, resetModeState, true); |
| option("pollInterval", 100); |
| option("undoDepth", 200, function(cm, val){cm.doc.history.undoDepth = val;}); |
| option("historyEventDelay", 1250); |
| option("viewportMargin", 10, function(cm){cm.refresh();}, true); |
| option("maxHighlightLength", 10000, resetModeState, true); |
| option("moveInputWithCursor", true, function(cm, val) { |
| if (!val) cm.display.inputDiv.style.top = cm.display.inputDiv.style.left = 0; |
| }); |
| |
| option("tabindex", null, function(cm, val) { |
| cm.display.input.tabIndex = val || ""; |
| }); |
| option("autofocus", null); |
| |
| // MODE DEFINITION AND QUERYING |
| |
| // Known modes, by name and by MIME |
| var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {}; |
| |
| // Extra arguments are stored as the mode's dependencies, which is |
| // used by (legacy) mechanisms like loadmode.js to automatically |
| // load a mode. (Preferred mechanism is the require/define calls.) |
| CodeMirror.defineMode = function(name, mode) { |
| if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name; |
| if (arguments.length > 2) { |
| mode.dependencies = []; |
| for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]); |
| } |
| modes[name] = mode; |
| }; |
| |
| CodeMirror.defineMIME = function(mime, spec) { |
| mimeModes[mime] = spec; |
| }; |
| |
| // Given a MIME type, a {name, ...options} config object, or a name |
| // string, return a mode config object. |
| CodeMirror.resolveMode = function(spec) { |
| if (typeof spec == "string" && mimeModes.hasOwnProperty(spec)) { |
| spec = mimeModes[spec]; |
| } else if (spec && typeof spec.name == "string" && mimeModes.hasOwnProperty(spec.name)) { |
| var found = mimeModes[spec.name]; |
| if (typeof found == "string") found = {name: found}; |
| spec = createObj(found, spec); |
| spec.name = found.name; |
| } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec)) { |
| return CodeMirror.resolveMode("application/xml"); |
| } |
| if (typeof spec == "string") return {name: spec}; |
| else return spec || {name: "null"}; |
| }; |
| |
| // Given a mode spec (anything that resolveMode accepts), find and |
| // initialize an actual mode object. |
| CodeMirror.getMode = function(options, spec) { |
| var spec = CodeMirror.resolveMode(spec); |
| var mfactory = modes[spec.name]; |
| if (!mfactory) return CodeMirror.getMode(options, "text/plain"); |
| var modeObj = mfactory(options, spec); |
| if (modeExtensions.hasOwnProperty(spec.name)) { |
| var exts = modeExtensions[spec.name]; |
| for (var prop in exts) { |
| if (!exts.hasOwnProperty(prop)) continue; |
| if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop]; |
| modeObj[prop] = exts[prop]; |
| } |
| } |
| modeObj.name = spec.name; |
| if (spec.helperType) modeObj.helperType = spec.helperType; |
| if (spec.modeProps) for (var prop in spec.modeProps) |
| modeObj[prop] = spec.modeProps[prop]; |
| |
| return modeObj; |
| }; |
| |
| // Minimal default mode. |
| CodeMirror.defineMode("null", function() { |
| return {token: function(stream) {stream.skipToEnd();}}; |
| }); |
| CodeMirror.defineMIME("text/plain", "null"); |
| |
| // This can be used to attach properties to mode objects from |
| // outside the actual mode definition. |
| var modeExtensions = CodeMirror.modeExtensions = {}; |
| CodeMirror.extendMode = function(mode, properties) { |
| var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {}); |
| copyObj(properties, exts); |
| }; |
| |
| // EXTENSIONS |
| |
| CodeMirror.defineExtension = function(name, func) { |
| CodeMirror.prototype[name] = func; |
| }; |
| CodeMirror.defineDocExtension = function(name, func) { |
| Doc.prototype[name] = func; |
| }; |
| CodeMirror.defineOption = option; |
| |
| var initHooks = []; |
| CodeMirror.defineInitHook = function(f) {initHooks.push(f);}; |
| |
| var helpers = CodeMirror.helpers = {}; |
| CodeMirror.registerHelper = function(type, name, value) { |
| if (!helpers.hasOwnProperty(type)) helpers[type] = CodeMirror[type] = {_global: []}; |
| helpers[type][name] = value; |
| }; |
| CodeMirror.registerGlobalHelper = function(type, name, predicate, value) { |
| CodeMirror.registerHelper(type, name, value); |
| helpers[type]._global.push({pred: predicate, val: value}); |
| }; |
| |
| // MODE STATE HANDLING |
| |
| // Utility functions for working with state. Exported because nested |
| // modes need to do this for their inner modes. |
| |
| var copyState = CodeMirror.copyState = function(mode, state) { |
| if (state === true) return state; |
| if (mode.copyState) return mode.copyState(state); |
| var nstate = {}; |
| for (var n in state) { |
| var val = state[n]; |
| if (val instanceof Array) val = val.concat([]); |
| nstate[n] = val; |
| } |
| return nstate; |
| }; |
| |
| var startState = CodeMirror.startState = function(mode, a1, a2) { |
| return mode.startState ? mode.startState(a1, a2) : true; |
| }; |
| |
| // Given a mode and a state (for that mode), find the inner mode and |
| // state at the position that the state refers to. |
| CodeMirror.innerMode = function(mode, state) { |
| while (mode.innerMode) { |
| var info = mode.innerMode(state); |
| if (!info || info.mode == mode) break; |
| state = info.state; |
| mode = info.mode; |
| } |
| return info || {mode: mode, state: state}; |
| }; |
| |
| // STANDARD COMMANDS |
| |
| // Commands are parameter-less actions that can be performed on an |
| // editor, mostly used for keybindings. |
| var commands = CodeMirror.commands = { |
| selectAll: function(cm) {cm.setSelection(Pos(cm.firstLine(), 0), Pos(cm.lastLine()), sel_dontScroll);}, |
| singleSelection: function(cm) { |
| cm.setSelection(cm.getCursor("anchor"), cm.getCursor("head"), sel_dontScroll); |
| }, |
| killLine: function(cm) { |
| deleteNearSelection(cm, function(range) { |
| if (range.empty()) { |
| var len = getLine(cm.doc, range.head.line).text.length; |
| if (range.head.ch == len && range.head.line < cm.lastLine()) |
| return {from: range.head, to: Pos(range.head.line + 1, 0)}; |
| else |
| return {from: range.head, to: Pos(range.head.line, len)}; |
| } else { |
| return {from: range.from(), to: range.to()}; |
| } |
| }); |
| }, |
| deleteLine: function(cm) { |
| deleteNearSelection(cm, function(range) { |
| return {from: Pos(range.from().line, 0), |
| to: clipPos(cm.doc, Pos(range.to().line + 1, 0))}; |
| }); |
| }, |
| delLineLeft: function(cm) { |
| deleteNearSelection(cm, function(range) { |
| return {from: Pos(range.from().line, 0), to: range.from()}; |
| }); |
| }, |
| undo: function(cm) {cm.undo();}, |
| redo: function(cm) {cm.redo();}, |
| undoSelection: function(cm) {cm.undoSelection();}, |
| redoSelection: function(cm) {cm.redoSelection();}, |
| goDocStart: function(cm) {cm.extendSelection(Pos(cm.firstLine(), 0));}, |
| goDocEnd: function(cm) {cm.extendSelection(Pos(cm.lastLine()));}, |
| goLineStart: function(cm) { |
| cm.extendSelectionsBy(function(range) { return lineStart(cm, range.head.line); }, sel_move); |
| }, |
| goLineStartSmart: function(cm) { |
| cm.extendSelectionsBy(function(range) { |
| var start = lineStart(cm, range.head.line); |
| var line = cm.getLineHandle(start.line); |
| var order = getOrder(line); |
| if (!order || order[0].level == 0) { |
| var firstNonWS = Math.max(0, line.text.search(/\S/)); |
| var inWS = range.head.line == start.line && range.head.ch <= firstNonWS && range.head.ch; |
| return Pos(start.line, inWS ? 0 : firstNonWS); |
| } |
| return start; |
| }, sel_move); |
| }, |
| goLineEnd: function(cm) { |
| cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); }, sel_move); |
| }, |
| goLineRight: function(cm) { |
| cm.extendSelectionsBy(function(range) { |
| var top = cm.charCoords(range.head, "div").top + 5; |
| return cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div"); |
| }, sel_move); |
| }, |
| goLineLeft: function(cm) { |
| cm.extendSelectionsBy(function(range) { |
| var top = cm.charCoords(range.head, "div").top + 5; |
| return cm.coordsChar({left: 0, top: top}, "div"); |
| }, sel_move); |
| }, |
| goLineUp: function(cm) {cm.moveV(-1, "line");}, |
| goLineDown: function(cm) {cm.moveV(1, "line");}, |
| goPageUp: function(cm) {cm.moveV(-1, "page");}, |
| goPageDown: function(cm) {cm.moveV(1, "page");}, |
| goCharLeft: function(cm) {cm.moveH(-1, "char");}, |
| goCharRight: function(cm) {cm.moveH(1, "char");}, |
| goColumnLeft: function(cm) {cm.moveH(-1, "column");}, |
| goColumnRight: function(cm) {cm.moveH(1, "column");}, |
| goWordLeft: function(cm) {cm.moveH(-1, "word");}, |
| goGroupRight: function(cm) {cm.moveH(1, "group");}, |
| goGroupLeft: function(cm) {cm.moveH(-1, "group");}, |
| goWordRight: function(cm) {cm.moveH(1, "word");}, |
| delCharBefore: function(cm) {cm.deleteH(-1, "char");}, |
| delCharAfter: function(cm) {cm.deleteH(1, "char");}, |
| delWordBefore: function(cm) {cm.deleteH(-1, "word");}, |
| delWordAfter: function(cm) {cm.deleteH(1, "word");}, |
| delGroupBefore: function(cm) {cm.deleteH(-1, "group");}, |
| delGroupAfter: function(cm) {cm.deleteH(1, "group");}, |
| indentAuto: function(cm) {cm.indentSelection("smart");}, |
| indentMore: function(cm) {cm.indentSelection("add");}, |
| indentLess: function(cm) {cm.indentSelection("subtract");}, |
| insertTab: function(cm) {cm.replaceSelection("\t");}, |
| insertSoftTab: function(cm) { |
| var spaces = [], ranges = cm.listSelections(), tabSize = cm.options.tabSize; |
| for (var i = 0; i < ranges.length; i++) { |
| var pos = ranges[i].from(); |
| var col = countColumn(cm.getLine(pos.line), pos.ch, tabSize); |
| spaces.push(new Array(tabSize - col % tabSize + 1).join(" ")); |
| } |
| cm.replaceSelections(spaces); |
| }, |
| defaultTab: function(cm) { |
| if (cm.somethingSelected()) cm.indentSelection("add"); |
| else cm.execCommand("insertTab"); |
| }, |
| transposeChars: function(cm) { |
| runInOp(cm, function() { |
| var ranges = cm.listSelections(); |
| for (var i = 0; i < ranges.length; i++) { |
| var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text; |
| if (cur.ch > 0 && cur.ch < line.length - 1) |
| cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1), |
| Pos(cur.line, cur.ch - 1), Pos(cur.line, cur.ch + 1)); |
| } |
| }); |
| }, |
| newlineAndIndent: function(cm) { |
| runInOp(cm, function() { |
| var len = cm.listSelections().length; |
| for (var i = 0; i < len; i++) { |
| var range = cm.listSelections()[i]; |
| cm.replaceRange("\n", range.anchor, range.head, "+input"); |
| cm.indentLine(range.from().line + 1, null, true); |
| ensureCursorVisible(cm); |
| } |
| }); |
| }, |
| toggleOverwrite: function(cm) {cm.toggleOverwrite();} |
| }; |
| |
| // STANDARD KEYMAPS |
| |
| var keyMap = CodeMirror.keyMap = {}; |
| keyMap.basic = { |
| "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown", |
| "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown", |
| "Delete": "delCharAfter", "Backspace": "delCharBefore", "Shift-Backspace": "delCharBefore", |
| "Tab": "defaultTab", "Shift-Tab": "indentAuto", |
| "Enter": "newlineAndIndent", "Insert": "toggleOverwrite", |
| "Esc": "singleSelection" |
| }; |
| // Note that the save and find-related commands aren't defined by |
| // default. User code or addons can define them. Unknown commands |
| // are simply ignored. |
| keyMap.pcDefault = { |
| "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo", |
| "Ctrl-Home": "goDocStart", "Ctrl-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd", |
| "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd", |
| "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find", |
| "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll", |
| "Ctrl-[": "indentLess", "Ctrl-]": "indentMore", |
| "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection", |
| fallthrough: "basic" |
| }; |
| keyMap.macDefault = { |
| "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo", |
| "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft", |
| "Alt-Right": "goGroupRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delGroupBefore", |
| "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find", |
| "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll", |
| "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delLineLeft", |
| "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", |
| fallthrough: ["basic", "emacsy"] |
| }; |
| // Very basic readline/emacs-style bindings, which are standard on Mac. |
| keyMap.emacsy = { |
| "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown", |
| "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", |
| "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", |
| "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars" |
| }; |
| keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault; |
| |
| // KEYMAP DISPATCH |
| |
| function getKeyMap(val) { |
| if (typeof val == "string") return keyMap[val]; |
| else return val; |
| } |
| |
| // Given an array of keymaps and a key name, call handle on any |
| // bindings found, until that returns a truthy value, at which point |
| // we consider the key handled. Implements things like binding a key |
| // to false stopping further handling and keymap fallthrough. |
| var lookupKey = CodeMirror.lookupKey = function(name, maps, handle) { |
| function lookup(map) { |
| map = getKeyMap(map); |
| var found = map[name]; |
| if (found === false) return "stop"; |
| if (found != null && handle(found)) return true; |
| if (map.nofallthrough) return "stop"; |
| |
| var fallthrough = map.fallthrough; |
| if (fallthrough == null) return false; |
| if (Object.prototype.toString.call(fallthrough) != "[object Array]") |
| return lookup(fallthrough); |
| for (var i = 0; i < fallthrough.length; ++i) { |
| var done = lookup(fallthrough[i]); |
| if (done) return done; |
| } |
| return false; |
| } |
| |
| for (var i = 0; i < maps.length; ++i) { |
| var done = lookup(maps[i]); |
| if (done) return done != "stop"; |
| } |
| }; |
| |
| // Modifier key presses don't count as 'real' key presses for the |
| // purpose of keymap fallthrough. |
| var isModifierKey = CodeMirror.isModifierKey = function(event) { |
| var name = keyNames[event.keyCode]; |
| return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod"; |
| }; |
| |
| // Look up the name of a key as indicated by an event object. |
| var keyName = CodeMirror.keyName = function(event, noShift) { |
| if (presto && event.keyCode == 34 && event["char"]) return false; |
| var name = keyNames[event.keyCode]; |
| if (name == null || event.altGraphKey) return false; |
| if (event.altKey) name = "Alt-" + name; |
| if (flipCtrlCmd ? event.metaKey : event.ctrlKey) name = "Ctrl-" + name; |
| if (flipCtrlCmd ? event.ctrlKey : event.metaKey) name = "Cmd-" + name; |
| if (!noShift && event.shiftKey) name = "Shift-" + name; |
| return name; |
| }; |
| |
| // FROMTEXTAREA |
| |
| CodeMirror.fromTextArea = function(textarea, options) { |
| if (!options) options = {}; |
| options.value = textarea.value; |
| if (!options.tabindex && textarea.tabindex) |
| options.tabindex = textarea.tabindex; |
| if (!options.placeholder && textarea.placeholder) |
| options.placeholder = textarea.placeholder; |
| // Set autofocus to true if this textarea is focused, or if it has |
| // autofocus and no other element is focused. |
| if (options.autofocus == null) { |
| var hasFocus = activeElt(); |
| options.autofocus = hasFocus == textarea || |
| textarea.getAttribute("autofocus") != null && hasFocus == document.body; |
| } |
| |
| function save() {textarea.value = cm.getValue();} |
| if (textarea.form) { |
| on(textarea.form, "submit", save); |
| // Deplorable hack to make the submit method do the right thing. |
| if (!options.leaveSubmitMethodAlone) { |
| var form = textarea.form, realSubmit = form.submit; |
| try { |
| var wrappedSubmit = form.submit = function() { |
| save(); |
| form.submit = realSubmit; |
| form.submit(); |
| form.submit = wrappedSubmit; |
| }; |
| } catch(e) {} |
| } |
| } |
| |
| textarea.style.display = "none"; |
| var cm = CodeMirror(function(node) { |
| textarea.parentNode.insertBefore(node, textarea.nextSibling); |
| }, options); |
| cm.save = save; |
| cm.getTextArea = function() { return textarea; }; |
| cm.toTextArea = function() { |
| save(); |
| textarea.parentNode.removeChild(cm.getWrapperElement()); |
| textarea.style.display = ""; |
| if (textarea.form) { |
| off(textarea.form, "submit", save); |
| if (typeof textarea.form.submit == "function") |
| textarea.form.submit = realSubmit; |
| } |
| }; |
| return cm; |
| }; |
| |
| // STRING STREAM |
| |
| // Fed to the mode parsers, provides helper functions to make |
| // parsers more succinct. |
| |
| var StringStream = CodeMirror.StringStream = function(string, tabSize) { |
| this.pos = this.start = 0; |
| this.string = string; |
| this.tabSize = tabSize || 8; |
| this.lastColumnPos = this.lastColumnValue = 0; |
| this.lineStart = 0; |
| }; |
| |
| StringStream.prototype = { |
| eol: function() {return this.pos >= this.string.length;}, |
| sol: function() {return this.pos == this.lineStart;}, |
| peek: function() {return this.string.charAt(this.pos) || undefined;}, |
| next: function() { |
| if (this.pos < this.string.length) |
| return this.string.charAt(this.pos++); |
| }, |
| eat: function(match) { |
| var ch = this.string.charAt(this.pos); |
| if (typeof match == "string") var ok = ch == match; |
| else var ok = ch && (match.test ? match.test(ch) : match(ch)); |
| if (ok) {++this.pos; return ch;} |
| }, |
| eatWhile: function(match) { |
| var start = this.pos; |
| while (this.eat(match)){} |
| return this.pos > start; |
| }, |
| eatSpace: function() { |
| var start = this.pos; |
| while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos; |
| return this.pos > start; |
| }, |
| skipToEnd: function() {this.pos = this.string.length;}, |
| skipTo: function(ch) { |
| var found = this.string.indexOf(ch, this.pos); |
| if (found > -1) {this.pos = found; return true;} |
| }, |
| backUp: function(n) {this.pos -= n;}, |
| column: function() { |
| if (this.lastColumnPos < this.start) { |
| this.lastColumnValue = countColumn(this.string, this.start, this.tabSize, this.lastColumnPos, this.lastColumnValue); |
| this.lastColumnPos = this.start; |
| } |
| return this.lastColumnValue - (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0); |
| }, |
| indentation: function() { |
| return countColumn(this.string, null, this.tabSize) - |
| (this.lineStart ? countColumn(this.string, this.lineStart, this.tabSize) : 0); |
| }, |
| match: function(pattern, consume, caseInsensitive) { |
| if (typeof pattern == "string") { |
| var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;}; |
| var substr = this.string.substr(this.pos, pattern.length); |
| if (cased(substr) == cased(pattern)) { |
| if (consume !== false) this.pos += pattern.length; |
| return true; |
| } |
| } else { |
| var match = this.string.slice(this.pos).match(pattern); |
| if (match && match.index > 0) return null; |
| if (match && consume !== false) this.pos += match[0].length; |
| return match; |
| } |
| }, |
| current: function(){return this.string.slice(this.start, this.pos);}, |
| hideFirstChars: function(n, inner) { |
| this.lineStart += n; |
| try { return inner(); } |
| finally { this.lineStart -= n; } |
| } |
| }; |
| |
| // TEXTMARKERS |
| |
| // Created with markText and setBookmark methods. A TextMarker is a |
| // handle that can be used to clear or find a marked position in the |
| // document. Line objects hold arrays (markedSpans) containing |
| // {from, to, marker} object pointing to such marker objects, and |
| // indicating that such a marker is present on that line. Multiple |
| // lines may point to the same marker when it spans across lines. |
| // The spans will have null for their from/to properties when the |
| // marker continues beyond the start/end of the line. Markers have |
| // links back to the lines they currently touch. |
| |
| var TextMarker = CodeMirror.TextMarker = function(doc, type) { |
| this.lines = []; |
| this.type = type; |
| this.doc = doc; |
| }; |
| eventMixin(TextMarker); |
| |
| // Clear the marker. |
| TextMarker.prototype.clear = function() { |
| if (this.explicitlyCleared) return; |
| var cm = this.doc.cm, withOp = cm && !cm.curOp; |
| if (withOp) startOperation(cm); |
| if (hasHandler(this, "clear")) { |
| var found = this.find(); |
| if (found) signalLater(this, "clear", found.from, found.to); |
| } |
| var min = null, max = null; |
| for (var i = 0; i < this.lines.length; ++i) { |
| var line = this.lines[i]; |
| var span = getMarkedSpanFor(line.markedSpans, this); |
| if (cm && !this.collapsed) regLineChange(cm, lineNo(line), "text"); |
| else if (cm) { |
| if (span.to != null) max = lineNo(line); |
| if (span.from != null) min = lineNo(line); |
| } |
| line.markedSpans = removeMarkedSpan(line.markedSpans, span); |
| if (span.from == null && this.collapsed && !lineIsHidden(this.doc, line) && cm) |
| updateLineHeight(line, textHeight(cm.display)); |
| } |
| if (cm && this.collapsed && !cm.options.lineWrapping) for (var i = 0; i < this.lines.length; ++i) { |
| var visual = visualLine(this.lines[i]), len = lineLength(visual); |
| if (len > cm.display.maxLineLength) { |
| cm.display.maxLine = visual; |
| cm.display.maxLineLength = len; |
| cm.display.maxLineChanged = true; |
| } |
| } |
| |
| if (min != null && cm && this.collapsed) regChange(cm, min, max + 1); |
| this.lines.length = 0; |
| this.explicitlyCleared = true; |
| if (this.atomic && this.doc.cantEdit) { |
| this.doc.cantEdit = false; |
| if (cm) reCheckSelection(cm.doc); |
| } |
| if (cm) signalLater(cm, "markerCleared", cm, this); |
| if (withOp) endOperation(cm); |
| if (this.parent) this.parent.clear(); |
| }; |
| |
| // Find the position of the marker in the document. Returns a {from, |
| // to} object by default. Side can be passed to get a specific side |
| // -- 0 (both), -1 (left), or 1 (right). When lineObj is true, the |
| // Pos objects returned contain a line object, rather than a line |
| // number (used to prevent looking up the same line twice). |
| TextMarker.prototype.find = function(side, lineObj) { |
| if (side == null && this.type == "bookmark") side = 1; |
| var from, to; |
| for (var i = 0; i < this.lines.length; ++i) { |
| var line = this.lines[i]; |
| var span = getMarkedSpanFor(line.markedSpans, this); |
| if (span.from != null) { |
| from = Pos(lineObj ? line : lineNo(line), span.from); |
| if (side == -1) return from; |
| } |
| if (span.to != null) { |
| to = Pos(lineObj ? line : lineNo(line), span.to); |
| if (side == 1) return to; |
| } |
| } |
| return from && {from: from, to: to}; |
| }; |
| |
| // Signals that the marker's widget changed, and surrounding layout |
| // should be recomputed. |
| TextMarker.prototype.changed = function() { |
| var pos = this.find(-1, true), widget = this, cm = this.doc.cm; |
| if (!pos || !cm) return; |
| runInOp(cm, function() { |
| var line = pos.line, lineN = lineNo(pos.line); |
| var view = findViewForLine(cm, lineN); |
| if (view) { |
| clearLineMeasurementCacheFor(view); |
| cm.curOp.selectionChanged = cm.curOp.forceUpdate = true; |
| } |
| cm.curOp.updateMaxLine = true; |
| if (!lineIsHidden(widget.doc, line) && widget.height != null) { |
| var oldHeight = widget.height; |
| widget.height = null; |
| var dHeight = widgetHeight(widget) - oldHeight; |
| if (dHeight) |
| updateLineHeight(line, line.height + dHeight); |
| } |
| }); |
| }; |
| |
| TextMarker.prototype.attachLine = function(line) { |
| if (!this.lines.length && this.doc.cm) { |
| var op = this.doc.cm.curOp; |
| if (!op.maybeHiddenMarkers || indexOf(op.maybeHiddenMarkers, this) == -1) |
| (op.maybeUnhiddenMarkers || (op.maybeUnhiddenMarkers = [])).push(this); |
| } |
| this.lines.push(line); |
| }; |
| TextMarker.prototype.detachLine = function(line) { |
| this.lines.splice(indexOf(this.lines, line), 1); |
| if (!this.lines.length && this.doc.cm) { |
| var op = this.doc.cm.curOp; |
| (op.maybeHiddenMarkers || (op.maybeHiddenMarkers = [])).push(this); |
| } |
| }; |
| |
| // Collapsed markers have unique ids, in order to be able to order |
| // them, which is needed for uniquely determining an outer marker |
| // when they overlap (they may nest, but not partially overlap). |
| var nextMarkerId = 0; |
| |
| // Create a marker, wire it up to the right lines, and |
| function markText(doc, from, to, options, type) { |
| // Shared markers (across linked documents) are handled separately |
| // (markTextShared will call out to this again, once per |
| // document). |
| if (options && options.shared) return markTextShared(doc, from, to, options, type); |
| // Ensure we are in an operation. |
| if (doc.cm && !doc.cm.curOp) return operation(doc.cm, markText)(doc, from, to, options, type); |
| |
| var marker = new TextMarker(doc, type), diff = cmp(from, to); |
| if (options) copyObj(options, marker, false); |
| // Don't connect empty markers unless clearWhenEmpty is false |
| if (diff > 0 || diff == 0 && marker.clearWhenEmpty !== false) |
| return marker; |
| if (marker.replacedWith) { |
| // Showing up as a widget implies collapsed (widget replaces text) |
| marker.collapsed = true; |
| marker.widgetNode = elt("span", [marker.replacedWith], "CodeMirror-widget"); |
| if (!options.handleMouseEvents) marker.widgetNode.ignoreEvents = true; |
| if (options.insertLeft) marker.widgetNode.insertLeft = true; |
| } |
| if (marker.collapsed) { |
| if (conflictingCollapsedRange(doc, from.line, from, to, marker) || |
| from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker)) |
| throw new Error("Inserting collapsed marker partially overlapping an existing one"); |
| sawCollapsedSpans = true; |
| } |
| |
| if (marker.addToHistory) |
| addChangeToHistory(doc, {from: from, to: to, origin: "markText"}, doc.sel, NaN); |
| |
| var curLine = from.line, cm = doc.cm, updateMaxLine; |
| doc.iter(curLine, to.line + 1, function(line) { |
| if (cm && marker.collapsed && !cm.options.lineWrapping && visualLine(line) == cm.display.maxLine) |
| updateMaxLine = true; |
| if (marker.collapsed && curLine != from.line) updateLineHeight(line, 0); |
| addMarkedSpan(line, new MarkedSpan(marker, |
| curLine == from.line ? from.ch : null, |
| curLine == to.line ? to.ch : null)); |
| ++curLine; |
| }); |
| // lineIsHidden depends on the presence of the spans, so needs a second pass |
| if (marker.collapsed) doc.iter(from.line, to.line + 1, function(line) { |
| if (lineIsHidden(doc, line)) updateLineHeight(line, 0); |
| }); |
| |
| if (marker.clearOnEnter) on(marker, "beforeCursorEnter", function() { marker.clear(); }); |
| |
| if (marker.readOnly) { |
| sawReadOnlySpans = true; |
| if (doc.history.done.length || doc.history.undone.length) |
| doc.clearHistory(); |
| } |
| if (marker.collapsed) { |
| marker.id = ++nextMarkerId; |
| marker.atomic = true; |
| } |
| if (cm) { |
| // Sync editor state |
| if (updateMaxLine) cm.curOp.updateMaxLine = true; |
| if (marker.collapsed) |
| regChange(cm, from.line, to.line + 1); |
| else if (marker.className || marker.title || marker.startStyle || marker.endStyle) |
| for (var i = from.line; i <= to.line; i++) regLineChange(cm, i, "text"); |
| if (marker.atomic) reCheckSelection(cm.doc); |
| signalLater(cm, "markerAdded", cm, marker); |
| } |
| return marker; |
| } |
| |
| // SHARED TEXTMARKERS |
| |
| // A shared marker spans multiple linked documents. It is |
| // implemented as a meta-marker-object controlling multiple normal |
| // markers. |
| var SharedTextMarker = CodeMirror.SharedTextMarker = function(markers, primary) { |
| this.markers = markers; |
| this.primary = primary; |
| for (var i = 0; i < markers.length; ++i) |
| markers[i].parent = this; |
| }; |
| eventMixin(SharedTextMarker); |
| |
| SharedTextMarker.prototype.clear = function() { |
| if (this.explicitlyCleared) return; |
| this.explicitlyCleared = true; |
| for (var i = 0; i < this.markers.length; ++i) |
| this.markers[i].clear(); |
| signalLater(this, "clear"); |
| }; |
| SharedTextMarker.prototype.find = function(side, lineObj) { |
| return this.primary.find(side, lineObj); |
| }; |
| |
| function markTextShared(doc, from, to, options, type) { |
| options = copyObj(options); |
| options.shared = false; |
| var markers = [markText(doc, from, to, options, type)], primary = markers[0]; |
| var widget = options.widgetNode; |
| linkedDocs(doc, function(doc) { |
| if (widget) options.widgetNode = widget.cloneNode(true); |
| markers.push(markText(doc, clipPos(doc, from), clipPos(doc, to), options, type)); |
| for (var i = 0; i < doc.linked.length; ++i) |
| if (doc.linked[i].isParent) return; |
| primary = lst(markers); |
| }); |
| return new SharedTextMarker(markers, primary); |
| } |
| |
| function findSharedMarkers(doc) { |
| return doc.findMarks(Pos(doc.first, 0), doc.clipPos(Pos(doc.lastLine())), |
| function(m) { return m.parent; }); |
| } |
| |
| function copySharedMarkers(doc, markers) { |
| for (var i = 0; i < markers.length; i++) { |
| var marker = markers[i], pos = marker.find(); |
| var mFrom = doc.clipPos(pos.from), mTo = doc.clipPos(pos.to); |
| if (cmp(mFrom, mTo)) { |
| var subMark = markText(doc, mFrom, mTo, marker.primary, marker.primary.type); |
| marker.markers.push(subMark); |
| subMark.parent = marker; |
| } |
| } |
| } |
| |
| function detachSharedMarkers(markers) { |
| for (var i = 0; i < markers.length; i++) { |
| var marker = markers[i], linked = [marker.primary.doc];; |
| linkedDocs(marker.primary.doc, function(d) { linked.push(d); }); |
| for (var j = 0; j < marker.markers.length; j++) { |
| var subMarker = marker.markers[j]; |
| if (indexOf(linked, subMarker.doc) == -1) { |
| subMarker.parent = null; |
| marker.markers.splice(j--, 1); |
| } |
| } |
| } |
| } |
| |
| // TEXTMARKER SPANS |
| |
| function MarkedSpan(marker, from, to) { |
| this.marker = marker; |
| this.from = from; this.to = to; |
| } |
| |
| // Search an array of spans for a span matching the given marker. |
| function getMarkedSpanFor(spans, marker) { |
| if (spans) for (var i = 0; i < spans.length; ++i) { |
| var span = spans[i]; |
| if (span.marker == marker) return span; |
| } |
| } |
| // Remove a span from an array, returning undefined if no spans are |
| // left (we don't store arrays for lines without spans). |
| function removeMarkedSpan(spans, span) { |
| for (var r, i = 0; i < spans.length; ++i) |
| if (spans[i] != span) (r || (r = [])).push(spans[i]); |
| return r; |
| } |
| // Add a span to a line. |
| function addMarkedSpan(line, span) { |
| line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span]; |
| span.marker.attachLine(line); |
| } |
| |
| // Used for the algorithm that adjusts markers for a change in the |
| // document. These functions cut an array of spans at a given |
| // character position, returning an array of remaining chunks (or |
| // undefined if nothing remains). |
| function markedSpansBefore(old, startCh, isInsert) { |
| if (old) for (var i = 0, nw; i < old.length; ++i) { |
| var span = old[i], marker = span.marker; |
| var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh); |
| if (startsBefore || span.from == startCh && marker.type == "bookmark" && (!isInsert || !span.marker.insertLeft)) { |
| var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh); |
| (nw || (nw = [])).push(new MarkedSpan(marker, span.from, endsAfter ? null : span.to)); |
| } |
| } |
| return nw; |
| } |
| function markedSpansAfter(old, endCh, isInsert) { |
| if (old) for (var i = 0, nw; i < old.length; ++i) { |
| var span = old[i], marker = span.marker; |
| var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh); |
| if (endsAfter || span.from == endCh && marker.type == "bookmark" && (!isInsert || span.marker.insertLeft)) { |
| var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh); |
| (nw || (nw = [])).push(new MarkedSpan(marker, startsBefore ? null : span.from - endCh, |
| span.to == null ? null : span.to - endCh)); |
| } |
| } |
| return nw; |
| } |
| |
| // Given a change object, compute the new set of marker spans that |
| // cover the line in which the change took place. Removes spans |
| // entirely within the change, reconnects spans belonging to the |
| // same marker that appear on both sides of the change, and cuts off |
| // spans partially within the change. Returns an array of span |
| // arrays with one element for each line in (after) the change. |
| function stretchSpansOverChange(doc, change) { |
| var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans; |
| var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans; |
| if (!oldFirst && !oldLast) return null; |
| |
| var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0; |
| // Get the spans that 'stick out' on both sides |
| var first = markedSpansBefore(oldFirst, startCh, isInsert); |
| var last = markedSpansAfter(oldLast, endCh, isInsert); |
| |
| // Next, merge those two ends |
| var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0); |
| if (first) { |
| // Fix up .to properties of first |
| for (var i = 0; i < first.length; ++i) { |
| var span = first[i]; |
| if (span.to == null) { |
| var found = getMarkedSpanFor(last, span.marker); |
| if (!found) span.to = startCh; |
| else if (sameLine) span.to = found.to == null ? null : found.to + offset; |
| } |
| } |
| } |
| if (last) { |
| // Fix up .from in last (or move them into first in case of sameLine) |
| for (var i = 0; i < last.length; ++i) { |
| var span = last[i]; |
| if (span.to != null) span.to += offset; |
| if (span.from == null) { |
| var found = getMarkedSpanFor(first, span.marker); |
| if (!found) { |
| span.from = offset; |
| if (sameLine) (first || (first = [])).push(span); |
| } |
| } else { |
| span.from += offset; |
| if (sameLine) (first || (first = [])).push(span); |
| } |
| } |
| } |
| // Make sure we didn't create any zero-length spans |
| if (first) first = clearEmptySpans(first); |
| if (last && last != first) last = clearEmptySpans(last); |
| |
| var newMarkers = [first]; |
| if (!sameLine) { |
| // Fill gap with whole-line-spans |
| var gap = change.text.length - 2, gapMarkers; |
| if (gap > 0 && first) |
| for (var i = 0; i < first.length; ++i) |
| if (first[i].to == null) |
| (gapMarkers || (gapMarkers = [])).push(new MarkedSpan(first[i].marker, null, null)); |
| for (var i = 0; i < gap; ++i) |
| newMarkers.push(gapMarkers); |
| newMarkers.push(last); |
| } |
| return newMarkers; |
| } |
| |
| // Remove spans that are empty and don't have a clearWhenEmpty |
| // option of false. |
| function clearEmptySpans(spans) { |
| for (var i = 0; i < spans.length; ++i) { |
| var span = spans[i]; |
| if (span.from != null && span.from == span.to && span.marker.clearWhenEmpty !== false) |
| spans.splice(i--, 1); |
| } |
| if (!spans.length) return null; |
| return spans; |
| } |
| |
| // Used for un/re-doing changes from the history. Combines the |
| // result of computing the existing spans with the set of spans that |
| // existed in the history (so that deleting around a span and then |
| // undoing brings back the span). |
| function mergeOldSpans(doc, change) { |
| var old = getOldSpans(doc, change); |
| var stretched = stretchSpansOverChange(doc, change); |
| if (!old) return stretched; |
| if (!stretched) return old; |
| |
| for (var i = 0; i < old.length; ++i) { |
| var oldCur = old[i], stretchCur = stretched[i]; |
| if (oldCur && stretchCur) { |
| spans: for (var j = 0; j < stretchCur.length; ++j) { |
| var span = stretchCur[j]; |
| for (var k = 0; k < oldCur.length; ++k) |
| if (oldCur[k].marker == span.marker) continue spans; |
| oldCur.push(span); |
| } |
| } else if (stretchCur) { |
| old[i] = stretchCur; |
| } |
| } |
| return old; |
| } |
| |
| // Used to 'clip' out readOnly ranges when making a change. |
| function removeReadOnlyRanges(doc, from, to) { |
| var markers = null; |
| doc.iter(from.line, to.line + 1, function(line) { |
| if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) { |
| var mark = line.markedSpans[i].marker; |
| if (mark.readOnly && (!markers || indexOf(markers, mark) == -1)) |
| (markers || (markers = [])).push(mark); |
| } |
| }); |
| if (!markers) return null; |
| var parts = [{from: from, to: to}]; |
| for (var i = 0; i < markers.length; ++i) { |
| var mk = markers[i], m = mk.find(0); |
| for (var j = 0; j < parts.length; ++j) { |
| var p = parts[j]; |
| if (cmp(p.to, m.from) < 0 || cmp(p.from, m.to) > 0) continue; |
| var newParts = [j, 1], dfrom = cmp(p.from, m.from), dto = cmp(p.to, m.to); |
| if (dfrom < 0 || !mk.inclusiveLeft && !dfrom) |
| newParts.push({from: p.from, to: m.from}); |
| if (dto > 0 || !mk.inclusiveRight && !dto) |
| newParts.push({from: m.to, to: p.to}); |
| parts.splice.apply(parts, newParts); |
| j += newParts.length - 1; |
| } |
| } |
| return parts; |
| } |
| |
| // Connect or disconnect spans from a line. |
| function detachMarkedSpans(line) { |
| var spans = line.markedSpans; |
| if (!spans) return; |
| for (var i = 0; i < spans.length; ++i) |
| spans[i].marker.detachLine(line); |
| line.markedSpans = null; |
| } |
| function attachMarkedSpans(line, spans) { |
| if (!spans) return; |
| for (var i = 0; i < spans.length; ++i) |
| spans[i].marker.attachLine(line); |
| line.markedSpans = spans; |
| } |
| |
| // Helpers used when computing which overlapping collapsed span |
| // counts as the larger one. |
| function extraLeft(marker) { return marker.inclusiveLeft ? -1 : 0; } |
| function extraRight(marker) { return marker.inclusiveRight ? 1 : 0; } |
| |
| // Returns a number indicating which of two overlapping collapsed |
| // spans is larger (and thus includes the other). Falls back to |
| // comparing ids when the spans cover exactly the same range. |
| function compareCollapsedMarkers(a, b) { |
| var lenDiff = a.lines.length - b.lines.length; |
| if (lenDiff != 0) return lenDiff; |
| var aPos = a.find(), bPos = b.find(); |
| var fromCmp = cmp(aPos.from, bPos.from) || extraLeft(a) - extraLeft(b); |
| if (fromCmp) return -fromCmp; |
| var toCmp = cmp(aPos.to, bPos.to) || extraRight(a) - extraRight(b); |
| if (toCmp) return toCmp; |
| return b.id - a.id; |
| } |
| |
| // Find out whether a line ends or starts in a collapsed span. If |
| // so, return the marker for that span. |
| function collapsedSpanAtSide(line, start) { |
| var sps = sawCollapsedSpans && line.markedSpans, found; |
| if (sps) for (var sp, i = 0; i < sps.length; ++i) { |
| sp = sps[i]; |
| if (sp.marker.collapsed && (start ? sp.from : sp.to) == null && |
| (!found || compareCollapsedMarkers(found, sp.marker) < 0)) |
| found = sp.marker; |
| } |
| return found; |
| } |
| function collapsedSpanAtStart(line) { return collapsedSpanAtSide(line, true); } |
| function collapsedSpanAtEnd(line) { return collapsedSpanAtSide(line, false); } |
| |
| // Test whether there exists a collapsed span that partially |
| // overlaps (covers the start or end, but not both) of a new span. |
| // Such overlap is not allowed. |
| function conflictingCollapsedRange(doc, lineNo, from, to, marker) { |
| var line = getLine(doc, lineNo); |
| var sps = sawCollapsedSpans && line.markedSpans; |
| if (sps) for (var i = 0; i < sps.length; ++i) { |
| var sp = sps[i]; |
| if (!sp.marker.collapsed) continue; |
| var found = sp.marker.find(0); |
| var fromCmp = cmp(found.from, from) || extraLeft(sp.marker) - extraLeft(marker); |
| var toCmp = cmp(found.to, to) || extraRight(sp.marker) - extraRight(marker); |
| if (fromCmp >= 0 && toCmp <= 0 || fromCmp <= 0 && toCmp >= 0) continue; |
| if (fromCmp <= 0 && (cmp(found.to, from) || extraRight(sp.marker) - extraLeft(marker)) > 0 || |
| fromCmp >= 0 && (cmp(found.from, to) || extraLeft(sp.marker) - extraRight(marker)) < 0) |
| return true; |
| } |
| } |
| |
| // A visual line is a line as drawn on the screen. Folding, for |
| // example, can cause multiple logical lines to appear on the same |
| // visual line. This finds the start of the visual line that the |
| // given line is part of (usually that is the line itself). |
| function visualLine(line) { |
| var merged; |
| while (merged = collapsedSpanAtStart(line)) |
| line = merged.find(-1, true).line; |
| return line; |
| } |
| |
| // Returns an array of logical lines that continue the visual line |
| // started by the argument, or undefined if there are no such lines. |
| function visualLineContinued(line) { |
| var merged, lines; |
| while (merged = collapsedSpanAtEnd(line)) { |
| line = merged.find(1, true).line; |
| (lines || (lines = [])).push(line); |
| } |
| return lines; |
| } |
| |
| // Get the line number of the start of the visual line that the |
| // given line number is part of. |
| function visualLineNo(doc, lineN) { |
| var line = getLine(doc, lineN), vis = visualLine(line); |
| if (line == vis) return lineN; |
| return lineNo(vis); |
| } |
| // Get the line number of the start of the next visual line after |
| // the given line. |
| function visualLineEndNo(doc, lineN) { |
| if (lineN > doc.lastLine()) return lineN; |
| var line = getLine(doc, lineN), merged; |
| if (!lineIsHidden(doc, line)) return lineN; |
| while (merged = collapsedSpanAtEnd(line)) |
| line = merged.find(1, true).line; |
| return lineNo(line) + 1; |
| } |
| |
| // Compute whether a line is hidden. Lines count as hidden when they |
| // are part of a visual line that starts with another line, or when |
| // they are entirely covered by collapsed, non-widget span. |
| function lineIsHidden(doc, line) { |
| var sps = sawCollapsedSpans && line.markedSpans; |
| if (sps) for (var sp, i = 0; i < sps.length; ++i) { |
| sp = sps[i]; |
| if (!sp.marker.collapsed) continue; |
| if (sp.from == null) return true; |
| if (sp.marker.widgetNode) continue; |
| if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(doc, line, sp)) |
| return true; |
| } |
| } |
| function lineIsHiddenInner(doc, line, span) { |
| if (span.to == null) { |
| var end = span.marker.find(1, true); |
| return lineIsHiddenInner(doc, end.line, getMarkedSpanFor(end.line.markedSpans, span.marker)); |
| } |
| if (span.marker.inclusiveRight && span.to == line.text.length) |
| return true; |
| for (var sp, i = 0; i < line.markedSpans.length; ++i) { |
| sp = line.markedSpans[i]; |
| if (sp.marker.collapsed && !sp.marker.widgetNode && sp.from == span.to && |
| (sp.to == null || sp.to != span.from) && |
| (sp.marker.inclusiveLeft || span.marker.inclusiveRight) && |
| lineIsHiddenInner(doc, line, sp)) return true; |
| } |
| } |
| |
| // LINE WIDGETS |
| |
| // Line widgets are block elements displayed above or below a line. |
| |
| var LineWidget = CodeMirror.LineWidget = function(cm, node, options) { |
| if (options) for (var opt in options) if (options.hasOwnProperty(opt)) |
| this[opt] = options[opt]; |
| this.cm = cm; |
| this.node = node; |
| }; |
| eventMixin(LineWidget); |
| |
| function adjustScrollWhenAboveVisible(cm, line, diff) { |
| if (heightAtLine(line) < ((cm.curOp && cm.curOp.scrollTop) || cm.doc.scrollTop)) |
| addToScrollPos(cm, null, diff); |
| } |
| |
| LineWidget.prototype.clear = function() { |
| var cm = this.cm, ws = this.line.widgets, line = this.line, no = lineNo(line); |
| if (no == null || !ws) return; |
| for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1); |
| if (!ws.length) line.widgets = null; |
| var height = widgetHeight(this); |
| runInOp(cm, function() { |
| adjustScrollWhenAboveVisible(cm, line, -height); |
| regLineChange(cm, no, "widget"); |
| updateLineHeight(line, Math.max(0, line.height - height)); |
| }); |
| }; |
| LineWidget.prototype.changed = function() { |
| var oldH = this.height, cm = this.cm, line = this.line; |
| this.height = null; |
| var diff = widgetHeight(this) - oldH; |
| if (!diff) return; |
| runInOp(cm, function() { |
| cm.curOp.forceUpdate = true; |
| adjustScrollWhenAboveVisible(cm, line, diff); |
| updateLineHeight(line, line.height + diff); |
| }); |
| }; |
| |
| function widgetHeight(widget) { |
| if (widget.height != null) return widget.height; |
| if (!contains(document.body, widget.node)) |
| removeChildrenAndAdd(widget.cm.display.measure, elt("div", [widget.node], null, "position: relative")); |
| return widget.height = widget.node.offsetHeight; |
| } |
| |
| function addLineWidget(cm, handle, node, options) { |
| var widget = new LineWidget(cm, node, options); |
| if (widget.noHScroll) cm.display.alignWidgets = true; |
| changeLine(cm, handle, "widget", function(line) { |
| var widgets = line.widgets || (line.widgets = []); |
| if (widget.insertAt == null) widgets.push(widget); |
| else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); |
| widget.line = line; |
| if (!lineIsHidden(cm.doc, line)) { |
| var aboveVisible = heightAtLine(line) < cm.doc.scrollTop; |
| updateLineHeight(line, line.height + widgetHeight(widget)); |
| if (aboveVisible) addToScrollPos(cm, null, widget.height); |
| cm.curOp.forceUpdate = true; |
| } |
| return true; |
| }); |
| return widget; |
| } |
| |
| // LINE DATA STRUCTURE |
| |
| // Line objects. These hold state related to a line, including |
| // highlighting info (the styles array). |
| var Line = CodeMirror.Line = function(text, markedSpans, estimateHeight) { |
| this.text = text; |
| attachMarkedSpans(this, markedSpans); |
| this.height = estimateHeight ? estimateHeight(this) : 1; |
| }; |
| eventMixin(Line); |
| Line.prototype.lineNo = function() { return lineNo(this); }; |
| |
| // Change the content (text, markers) of a line. Automatically |
| // invalidates cached information and tries to re-estimate the |
| // line's height. |
| function updateLine(line, text, markedSpans, estimateHeight) { |
| line.text = text; |
| if (line.stateAfter) line.stateAfter = null; |
| if (line.styles) line.styles = null; |
| if (line.order != null) line.order = null; |
| detachMarkedSpans(line); |
| attachMarkedSpans(line, markedSpans); |
| var estHeight = estimateHeight ? estimateHeight(line) : 1; |
| if (estHeight != line.height) updateLineHeight(line, estHeight); |
| } |
| |
| // Detach a line from the document tree and its markers. |
| function cleanUpLine(line) { |
| line.parent = null; |
| detachMarkedSpans(line); |
| } |
| |
| function extractLineClasses(type, output) { |
| if (type) for (;;) { |
| var lineClass = type.match(/(?:^|\s+)line-(background-)?(\S+)/); |
| if (!lineClass) break; |
| type = type.slice(0, lineClass.index) + type.slice(lineClass.index + lineClass[0].length); |
| var prop = lineClass[1] ? "bgClass" : "textClass"; |
| if (output[prop] == null) |
| output[prop] = lineClass[2]; |
| else if (!(new RegExp("(?:^|\s)" + lineClass[2] + "(?:$|\s)")).test(output[prop])) |
| output[prop] += " " + lineClass[2]; |
| } |
| return type; |
| } |
| |
| function callBlankLine(mode, state) { |
| if (mode.blankLine) return mode.blankLine(state); |
| if (!mode.innerMode) return; |
| var inner = CodeMirror.innerMode(mode, state); |
| if (inner.mode.blankLine) return inner.mode.blankLine(inner.state); |
| } |
| |
| function readToken(mode, stream, state) { |
| var style = mode.token(stream, state); |
| if (stream.pos <= stream.start) |
| throw new Error("Mode " + mode.name + " failed to advance stream."); |
| return style; |
| } |
| |
| // Run the given mode's parser over a line, calling f for each token. |
| function runMode(cm, text, mode, state, f, lineClasses, forceToEnd) { |
| var flattenSpans = mode.flattenSpans; |
| if (flattenSpans == null) flattenSpans = cm.options.flattenSpans; |
| var curStart = 0, curStyle = null; |
| var stream = new StringStream(text, cm.options.tabSize), style; |
| if (text == "") extractLineClasses(callBlankLine(mode, state), lineClasses); |
| while (!stream.eol()) { |
| if (stream.pos > cm.options.maxHighlightLength) { |
| flattenSpans = false; |
| if (forceToEnd) processLine(cm, text, state, stream.pos); |
| stream.pos = text.length; |
| style = null; |
| } else { |
| style = extractLineClasses(readToken(mode, stream, state), lineClasses); |
| } |
| if (cm.options.addModeClass) { |
| var mName = CodeMirror.innerMode(mode, state).mode.name; |
| if (mName) style = "m-" + (style ? mName + " " + style : mName); |
| } |
| if (!flattenSpans || curStyle != style) { |
| if (curStart < stream.start) f(stream.start, curStyle); |
| curStart = stream.start; curStyle = style; |
| } |
| stream.start = stream.pos; |
| } |
| while (curStart < stream.pos) { |
| // Webkit seems to refuse to render text nodes longer than 57444 characters |
| var pos = Math.min(stream.pos, curStart + 50000); |
| f(pos, curStyle); |
| curStart = pos; |
| } |
| } |
| |
| // Compute a style array (an array starting with a mode generation |
| // -- for invalidation -- followed by pairs of end positions and |
| // style strings), which is used to highlight the tokens on the |
| // line. |
| function highlightLine(cm, line, state, forceToEnd) { |
| // A styles array always starts with a number identifying the |
| // mode/overlays that it is based on (for easy invalidation). |
| var st = [cm.state.modeGen], lineClasses = {}; |
| // Compute the base array of styles |
| runMode(cm, line.text, cm.doc.mode, state, function(end, style) { |
| st.push(end, style); |
| }, lineClasses, forceToEnd); |
| |
| // Run overlays, adjust style array. |
| for (var o = 0; o < cm.state.overlays.length; ++o) { |
| var overlay = cm.state.overlays[o], i = 1, at = 0; |
| runMode(cm, line.text, overlay.mode, true, function(end, style) { |
| var start = i; |
| // Ensure there's a token end at the current position, and that i points at it |
| while (at < end) { |
| var i_end = st[i]; |
| if (i_end > end) |
| st.splice(i, 1, end, st[i+1], i_end); |
| i += 2; |
| at = Math.min(end, i_end); |
| } |
| if (!style) return; |
| if (overlay.opaque) { |
| st.splice(start, i - start, end, "cm-overlay " + style); |
| i = start + 2; |
| } else { |
| for (; start < i; start += 2) { |
| var cur = st[start+1]; |
| st[start+1] = (cur ? cur + " " : "") + "cm-overlay " + style; |
| } |
| } |
| }, lineClasses); |
| } |
| |
| return {styles: st, classes: lineClasses.bgClass || lineClasses.textClass ? lineClasses : null}; |
| } |
| |
| function getLineStyles(cm, line) { |
| if (!line.styles || line.styles[0] != cm.state.modeGen) { |
| var result = highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line))); |
| line.styles = result.styles; |
| if (result.classes) line.styleClasses = result.classes; |
| else if (line.styleClasses) line.styleClasses = null; |
| } |
| return line.styles; |
| } |
| |
| // Lightweight form of highlight -- proceed over this line and |
| // update state, but don't save a style array. Used for lines that |
| // aren't currently visible. |
| function processLine(cm, text, state, startAt) { |
| var mode = cm.doc.mode; |
| var stream = new StringStream(text, cm.options.tabSize); |
| stream.start = stream.pos = startAt || 0; |
| if (text == "") callBlankLine(mode, state); |
| while (!stream.eol() && stream.pos <= cm.options.maxHighlightLength) { |
| readToken(mode, stream, state); |
| stream.start = stream.pos; |
| } |
| } |
| |
| // Convert a style as returned by a mode (either null, or a string |
| // containing one or more styles) to a CSS style. This is cached, |
| // and also looks for line-wide styles. |
| var styleToClassCache = {}, styleToClassCacheWithMode = {}; |
| function interpretTokenStyle(style, options) { |
| if (!style || /^\s*$/.test(style)) return null; |
| var cache = options.addModeClass ? styleToClassCacheWithMode : styleToClassCache; |
| return cache[style] || |
| (cache[style] = style.replace(/\S+/g, "cm-$&")); |
| } |
| |
| // Render the DOM representation of the text of a line. Also builds |
| // up a 'line map', which points at the DOM nodes that represent |
| // specific stretches of text, and is used by the measuring code. |
| // The returned object contains the DOM node, this map, and |
| // information about line-wide styles that were set by the mode. |
| function buildLineContent(cm, lineView) { |
| // The padding-right forces the element to have a 'border', which |
| // is needed on Webkit to be able to get line-level bounding |
| // rectangles for it (in measureChar). |
| var content = elt("span", null, null, webkit ? "padding-right: .1px" : null); |
| var builder = {pre: elt("pre", [content]), content: content, col: 0, pos: 0, cm: cm}; |
| lineView.measure = {}; |
| |
| // Iterate over the logical lines that make up this visual line. |
| for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) { |
| var line = i ? lineView.rest[i - 1] : lineView.line, order; |
| builder.pos = 0; |
| builder.addToken = buildToken; |
| // Optionally wire in some hacks into the token-rendering |
| // algorithm, to deal with browser quirks. |
| if ((ie || webkit) && cm.getOption("lineWrapping")) |
| builder.addToken = buildTokenSplitSpaces(builder.addToken); |
| if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line))) |
| builder.addToken = buildTokenBadBidi(builder.addToken, order); |
| builder.map = []; |
| insertLineContent(line, builder, getLineStyles(cm, line)); |
| if (line.styleClasses) { |
| if (line.styleClasses.bgClass) |
| builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); |
| if (line.styleClasses.textClass) |
| builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); |
| } |
| |
| // Ensure at least a single node is present, for measuring. |
| if (builder.map.length == 0) |
| builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); |
| |
| // Store the map and a cache object for the current logical line |
| if (i == 0) { |
| lineView.measure.map = builder.map; |
| lineView.measure.cache = {}; |
| } else { |
| (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map); |
| (lineView.measure.caches || (lineView.measure.caches = [])).push({}); |
| } |
| } |
| |
| signal(cm, "renderLine", cm, lineView.line, builder.pre); |
| return builder; |
| } |
| |
| function defaultSpecialCharPlaceholder(ch) { |
| var token = elt("span", "\u2022", "cm-invalidchar"); |
| token.title = "\\u" + ch.charCodeAt(0).toString(16); |
| return token; |
| } |
| |
| // Build up the DOM representation for a single token, and add it to |
| // the line map. Takes care to render special characters separately. |
| function buildToken(builder, text, style, startStyle, endStyle, title) { |
| if (!text) return; |
| var special = builder.cm.options.specialChars, mustWrap = false; |
| if (!special.test(text)) { |
| builder.col += text.length; |
| var content = document.createTextNode(text); |
| builder.map.push(builder.pos, builder.pos + text.length, content); |
| if (ie_upto8) mustWrap = true; |
| builder.pos += text.length; |
| } else { |
| var content = document.createDocumentFragment(), pos = 0; |
| while (true) { |
| special.lastIndex = pos; |
| var m = special.exec(text); |
| var skipped = m ? m.index - pos : text.length - pos; |
| if (skipped) { |
| var txt = document.createTextNode(text.slice(pos, pos + skipped)); |
| if (ie_upto8) content.appendChild(elt("span", [txt])); |
| else content.appendChild(txt); |
| builder.map.push(builder.pos, builder.pos + skipped, txt); |
| builder.col += skipped; |
| builder.pos += skipped; |
| } |
| if (!m) break; |
| pos += skipped + 1; |
| if (m[0] == "\t") { |
| var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize; |
| var txt = content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab")); |
| builder.col += tabWidth; |
| } else { |
| var txt = builder.cm.options.specialCharPlaceholder(m[0]); |
| if (ie_upto8) content.appendChild(elt("span", [txt])); |
| else content.appendChild(txt); |
| builder.col += 1; |
| } |
| builder.map.push(builder.pos, builder.pos + 1, txt); |
| builder.pos++; |
| } |
| } |
| if (style || startStyle || endStyle || mustWrap) { |
| var fullStyle = style || ""; |
| if (startStyle) fullStyle += startStyle; |
| if (endStyle) fullStyle += endStyle; |
| var token = elt("span", [content], fullStyle); |
| if (title) token.title = title; |
| return builder.content.appendChild(token); |
| } |
| builder.content.appendChild(content); |
| } |
| |
| function buildTokenSplitSpaces(inner) { |
| function split(old) { |
| var out = " "; |
| for (var i = 0; i < old.length - 2; ++i) out += i % 2 ? " " : "\u00a0"; |
| out += " "; |
| return out; |
| } |
| return function(builder, text, style, startStyle, endStyle, title) { |
| inner(builder, text.replace(/ {3,}/g, split), style, startStyle, endStyle, title); |
| }; |
| } |
| |
| // Work around nonsense dimensions being reported for stretches of |
| // right-to-left text. |
| function buildTokenBadBidi(inner, order) { |
| return function(builder, text, style, startStyle, endStyle, title) { |
| style = style ? style + " cm-force-border" : "cm-force-border"; |
| var start = builder.pos, end = start + text.length; |
| for (;;) { |
| // Find the part that overlaps with the start of this text |
| for (var i = 0; i < order.length; i++) { |
| var part = order[i]; |
| if (part.to > start && part.from <= start) break; |
| } |
| if (part.to >= end) return inner(builder, text, style, startStyle, endStyle, title); |
| inner(builder, text.slice(0, part.to - start), style, startStyle, null, title); |
| startStyle = null; |
| text = text.slice(part.to - start); |
| start = part.to; |
| } |
| }; |
| } |
| |
| function buildCollapsedSpan(builder, size, marker, ignoreWidget) { |
| var widget = !ignoreWidget && marker.widgetNode; |
| if (widget) { |
| builder.map.push(builder.pos, builder.pos + size, widget); |
| builder.content.appendChild(widget); |
| } |
| builder.pos += size; |
| } |
| |
| // Outputs a number of spans to make up a line, taking highlighting |
| // and marked text into account. |
| function insertLineContent(line, builder, styles) { |
| var spans = line.markedSpans, allText = line.text, at = 0; |
| if (!spans) { |
| for (var i = 1; i < styles.length; i+=2) |
| builder.addToken(builder, allText.slice(at, at = styles[i]), interpretTokenStyle(styles[i+1], builder.cm.options)); |
| return; |
| } |
| |
| var len = allText.length, pos = 0, i = 1, text = "", style; |
| var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed; |
| for (;;) { |
| if (nextChange == pos) { // Update current marker set |
| spanStyle = spanEndStyle = spanStartStyle = title = ""; |
| collapsed = null; nextChange = Infinity; |
| var foundBookmarks = []; |
| for (var j = 0; j < spans.length; ++j) { |
| var sp = spans[j], m = sp.marker; |
| if (sp.from <= pos && (sp.to == null || sp.to > pos)) { |
| if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; } |
| if (m.className) spanStyle += " " + m.className; |
| if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle; |
| if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle; |
| if (m.title && !title) title = m.title; |
| if (m.collapsed && (!collapsed || compareCollapsedMarkers(collapsed.marker, m) < 0)) |
| collapsed = sp; |
| } else if (sp.from > pos && nextChange > sp.from) { |
| nextChange = sp.from; |
| } |
| if (m.type == "bookmark" && sp.from == pos && m.widgetNode) foundBookmarks.push(m); |
| } |
| if (collapsed && (collapsed.from || 0) == pos) { |
| buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos, |
| collapsed.marker, collapsed.from == null); |
| if (collapsed.to == null) return; |
| } |
| if (!collapsed && foundBookmarks.length) for (var j = 0; j < foundBookmarks.length; ++j) |
| buildCollapsedSpan(builder, 0, foundBookmarks[j]); |
| } |
| if (pos >= len) break; |
| |
| var upto = Math.min(len, nextChange); |
| while (true) { |
| if (text) { |
| var end = pos + text.length; |
| if (!collapsed) { |
| var tokenText = end > upto ? text.slice(0, upto - pos) : text; |
| builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle, |
| spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title); |
| } |
| if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;} |
| pos = end; |
| spanStartStyle = ""; |
| } |
| text = allText.slice(at, at = styles[i++]); |
| style = interpretTokenStyle(styles[i++], builder.cm.options); |
| } |
| } |
| } |
| |
| // DOCUMENT DATA STRUCTURE |
| |
| // By default, updates that start and end at the beginning of a line |
| // are treated specially, in order to make the association of line |
| // widgets and marker elements with the text behave more intuitive. |
| function isWholeLineUpdate(doc, change) { |
| return change.from.ch == 0 && change.to.ch == 0 && lst(change.text) == "" && |
| (!doc.cm || doc.cm.options.wholeLineUpdateBefore); |
| } |
| |
| // Perform a change on the document data structure. |
| function updateDoc(doc, change, markedSpans, estimateHeight) { |
| function spansFor(n) {return markedSpans ? markedSpans[n] : null;} |
| function update(line, text, spans) { |
| updateLine(line, text, spans, estimateHeight); |
| signalLater(line, "change", line, change); |
| } |
| |
| var from = change.from, to = change.to, text = change.text; |
| var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line); |
| var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line; |
| |
| // Adjust the line structure |
| if (isWholeLineUpdate(doc, change)) { |
| // This is a whole-line replace. Treated specially to make |
| // sure line objects move the way they are supposed to. |
| for (var i = 0, added = []; i < text.length - 1; ++i) |
| added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| update(lastLine, lastLine.text, lastSpans); |
| if (nlines) doc.remove(from.line, nlines); |
| if (added.length) doc.insert(from.line, added); |
| } else if (firstLine == lastLine) { |
| if (text.length == 1) { |
| update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans); |
| } else { |
| for (var added = [], i = 1; i < text.length - 1; ++i) |
| added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| added.push(new Line(lastText + firstLine.text.slice(to.ch), lastSpans, estimateHeight)); |
| update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0)); |
| doc.insert(from.line + 1, added); |
| } |
| } else if (text.length == 1) { |
| update(firstLine, firstLine.text.slice(0, from.ch) + text[0] + lastLine.text.slice(to.ch), spansFor(0)); |
| doc.remove(from.line + 1, nlines); |
| } else { |
| update(firstLine, firstLine.text.slice(0, from.ch) + text[0], spansFor(0)); |
| update(lastLine, lastText + lastLine.text.slice(to.ch), lastSpans); |
| for (var i = 1, added = []; i < text.length - 1; ++i) |
| added.push(new Line(text[i], spansFor(i), estimateHeight)); |
| if (nlines > 1) doc.remove(from.line + 1, nlines - 1); |
| doc.insert(from.line + 1, added); |
| } |
| |
| signalLater(doc, "change", doc, change); |
| } |
| |
| // The document is represented as a BTree consisting of leaves, with |
| // chunk of lines in them, and branches, with up to ten leaves or |
| // other branch nodes below them. The top node is always a branch |
| // node, and is the document object itself (meaning it has |
| // additional methods and properties). |
| // |
| // All nodes have parent links. The tree is used both to go from |
| // line numbers to line objects, and to go from objects to numbers. |
| // It also indexes by height, and is used to convert between height |
| // and line object, and to find the total height of the document. |
| // |
| // See also http://marijnhaverbeke.nl/blog/codemirror-line-tree.html |
| |
| function LeafChunk(lines) { |
| this.lines = lines; |
| this.parent = null; |
| for (var i = 0, height = 0; i < lines.length; ++i) { |
| lines[i].parent = this; |
| height += lines[i].height; |
| } |
| this.height = height; |
| } |
| |
| LeafChunk.prototype = { |
| chunkSize: function() { return this.lines.length; }, |
| // Remove the n lines at offset 'at'. |
| removeInner: function(at, n) { |
| for (var i = at, e = at + n; i < e; ++i) { |
| var line = this.lines[i]; |
| this.height -= line.height; |
| cleanUpLine(line); |
| signalLater(line, "delete"); |
| } |
| this.lines.splice(at, n); |
| }, |
| // Helper used to collapse a small branch into a single leaf. |
| collapse: function(lines) { |
| lines.push.apply(lines, this.lines); |
| }, |
| // Insert the given array of lines at offset 'at', count them as |
| // having the given height. |
| insertInner: function(at, lines, height) { |
| this.height += height; |
| this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at)); |
| for (var i = 0; i < lines.length; ++i) lines[i].parent = this; |
| }, |
| // Used to iterate over a part of the tree. |
| iterN: function(at, n, op) { |
| for (var e = at + n; at < e; ++at) |
| if (op(this.lines[at])) return true; |
| } |
| }; |
| |
| function BranchChunk(children) { |
| this.children = children; |
| var size = 0, height = 0; |
| for (var i = 0; i < children.length; ++i) { |
| var ch = children[i]; |
| size += ch.chunkSize(); height += ch.height; |
| ch.parent = this; |
| } |
| this.size = size; |
| this.height = height; |
| this.parent = null; |
| } |
| |
| BranchChunk.prototype = { |
| chunkSize: function() { return this.size; }, |
| removeInner: function(at, n) { |
| this.size -= n; |
| for (var i = 0; i < this.children.length; ++i) { |
| var child = this.children[i], sz = child.chunkSize(); |
| if (at < sz) { |
| var rm = Math.min(n, sz - at), oldHeight = child.height; |
| child.removeInner(at, rm); |
| this.height -= oldHeight - child.height; |
| if (sz == rm) { this.children.splice(i--, 1); child.parent = null; } |
| if ((n -= rm) == 0) break; |
| at = 0; |
| } else at -= sz; |
| } |
| // If the result is smaller than 25 lines, ensure that it is a |
| // single leaf node. |
| if (this.size - n < 25 && |
| (this.children.length > 1 || !(this.children[0] instanceof LeafChunk))) { |
| var lines = []; |
| this.collapse(lines); |
| this.children = [new LeafChunk(lines)]; |
| this.children[0].parent = this; |
| } |
| }, |
| collapse: function(lines) { |
| for (var i = 0; i < this.children.length; ++i) this.children[i].collapse(lines); |
| }, |
| insertInner: function(at, lines, height) { |
| this.size += lines.length; |
| this.height += height; |
| for (var i = 0; i < this.children.length; ++i) { |
| var child = this.children[i], sz = child.chunkSize(); |
| if (at <= sz) { |
| child.insertInner(at, lines, height); |
| if (child.lines && child.lines.length > 50) { |
| while (child.lines.length > 50) { |
| var spilled = child.lines.splice(child.lines.length - 25, 25); |
| var newleaf = new LeafChunk(spilled); |
| child.height -= newleaf.height; |
| this.children.splice(i + 1, 0, newleaf); |
| newleaf.parent = this; |
| } |
| this.maybeSpill(); |
| } |
| break; |
| } |
| at -= sz; |
| } |
| }, |
| // When a node has grown, check whether it should be split. |
| maybeSpill: function() { |
| if (this.children.length <= 10) return; |
| var me = this; |
| do { |
| var spilled = me.children.splice(me.children.length - 5, 5); |
| var sibling = new BranchChunk(spilled); |
| if (!me.parent) { // Become the parent node |
| var copy = new BranchChunk(me.children); |
| copy.parent = me; |
| me.children = [copy, sibling]; |
| me = copy; |
| } else { |
| me.size -= sibling.size; |
| me.height -= sibling.height; |
| var myIndex = indexOf(me.parent.children, me); |
| me.parent.children.splice(myIndex + 1, 0, sibling); |
| } |
| sibling.parent = me.parent; |
| } while (me.children.length > 10); |
| me.parent.maybeSpill(); |
| }, |
| iterN: function(at, n, op) { |
| for (var i = 0; i < this.children.length; ++i) { |
| var child = this.children[i], sz = child.chunkSize(); |
| if (at < sz) { |
| var used = Math.min(n, sz - at); |
| if (child.iterN(at, used, op)) return true; |
| if ((n -= used) == 0) break; |
| at = 0; |
| } else at -= sz; |
| } |
| } |
| }; |
| |
| var nextDocId = 0; |
| var Doc = CodeMirror.Doc = function(text, mode, firstLine) { |
| if (!(this instanceof Doc)) return new Doc(text, mode, firstLine); |
| if (firstLine == null) firstLine = 0; |
| |
| BranchChunk.call(this, [new LeafChunk([new Line("", null)])]); |
| this.first = firstLine; |
| this.scrollTop = this.scrollLeft = 0; |
| this.cantEdit = false; |
| this.cleanGeneration = 1; |
| this.frontier = firstLine; |
| var start = Pos(firstLine, 0); |
| this.sel = simpleSelection(start); |
| this.history = new History(null); |
| this.id = ++nextDocId; |
| this.modeOption = mode; |
| |
| if (typeof text == "string") text = splitLines(text); |
| updateDoc(this, {from: start, to: start, text: text}); |
| setSelection(this, simpleSelection(start), sel_dontScroll); |
| }; |
| |
| Doc.prototype = createObj(BranchChunk.prototype, { |
| constructor: Doc, |
| // Iterate over the document. Supports two forms -- with only one |
| // argument, it calls that for each line in the document. With |
| // three, it iterates over the range given by the first two (with |
| // the second being non-inclusive). |
| iter: function(from, to, op) { |
| if (op) this.iterN(from - this.first, to - from, op); |
| else this.iterN(this.first, this.first + this.size, from); |
| }, |
| |
| // Non-public interface for adding and removing lines. |
| insert: function(at, lines) { |
| var height = 0; |
| for (var i = 0; i < lines.length; ++i) height += lines[i].height; |
| this.insertInner(at - this.first, lines, height); |
| }, |
| remove: function(at, n) { this.removeInner(at - this.first, n); }, |
| |
| // From here, the methods are part of the public interface. Most |
| // are also available from CodeMirror (editor) instances. |
| |
| getValue: function(lineSep) { |
| var lines = getLines(this, this.first, this.first + this.size); |
| if (lineSep === false) return lines; |
| return lines.join(lineSep || "\n"); |
| }, |
| setValue: docMethodOp(function(code) { |
| var top = Pos(this.first, 0), last = this.first + this.size - 1; |
| makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length), |
| text: splitLines(code), origin: "setValue"}, true); |
| setSelection(this, simpleSelection(top)); |
| }), |
| replaceRange: function(code, from, to, origin) { |
| from = clipPos(this, from); |
| to = to ? clipPos(this, to) : from; |
| replaceRange(this, code, from, to, origin); |
| }, |
| getRange: function(from, to, lineSep) { |
| var lines = getBetween(this, clipPos(this, from), clipPos(this, to)); |
| if (lineSep === false) return lines; |
| return lines.join(lineSep || "\n"); |
| }, |
| |
| getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;}, |
| |
| getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);}, |
| getLineNumber: function(line) {return lineNo(line);}, |
| |
| getLineHandleVisualStart: function(line) { |
| if (typeof line == "number") line = getLine(this, line); |
| return visualLine(line); |
| }, |
| |
| lineCount: function() {return this.size;}, |
| firstLine: function() {return this.first;}, |
| lastLine: function() {return this.first + this.size - 1;}, |
| |
| clipPos: function(pos) {return clipPos(this, pos);}, |
| |
| getCursor: function(start) { |
| var range = this.sel.primary(), pos; |
| if (start == null || start == "head") pos = range.head; |
| else if (start == "anchor") pos = range.anchor; |
| else if (start == "end" || start == "to" || start === false) pos = range.to(); |
| else pos = range.from(); |
| return pos; |
| }, |
| listSelections: function() { return this.sel.ranges; }, |
| somethingSelected: function() {return this.sel.somethingSelected();}, |
| |
| setCursor: docMethodOp(function(line, ch, options) { |
| setSimpleSelection(this, clipPos(this, typeof line == "number" ? Pos(line, ch || 0) : line), null, options); |
| }), |
| setSelection: docMethodOp(function(anchor, head, options) { |
| setSimpleSelection(this, clipPos(this, anchor), clipPos(this, head || anchor), options); |
| }), |
| extendSelection: docMethodOp(function(head, other, options) { |
| extendSelection(this, clipPos(this, head), other && clipPos(this, other), options); |
| }), |
| extendSelections: docMethodOp(function(heads, options) { |
| extendSelections(this, clipPosArray(this, heads, options)); |
| }), |
| extendSelectionsBy: docMethodOp(function(f, options) { |
| extendSelections(this, map(this.sel.ranges, f), options); |
| }), |
| setSelections: docMethodOp(function(ranges, primary, options) { |
| if (!ranges.length) return; |
| for (var i = 0, out = []; i < ranges.length; i++) |
| out[i] = new Range(clipPos(this, ranges[i].anchor), |
| clipPos(this, ranges[i].head)); |
| if (primary == null) primary = Math.min(ranges.length - 1, this.sel.primIndex); |
| setSelection(this, normalizeSelection(out, primary), options); |
| }), |
| addSelection: docMethodOp(function(anchor, head, options) { |
| var ranges = this.sel.ranges.slice(0); |
| ranges.push(new Range(clipPos(this, anchor), clipPos(this, head || anchor))); |
| setSelection(this, normalizeSelection(ranges, ranges.length - 1), options); |
| }), |
| |
| getSelection: function(lineSep) { |
| var ranges = this.sel.ranges, lines; |
| for (var i = 0; i < ranges.length; i++) { |
| var sel = getBetween(this, ranges[i].from(), ranges[i].to()); |
| lines = lines ? lines.concat(sel) : sel; |
| } |
| if (lineSep === false) return lines; |
| else return lines.join(lineSep || "\n"); |
| }, |
| getSelections: function(lineSep) { |
| var parts = [], ranges = this.sel.ranges; |
| for (var i = 0; i < ranges.length; i++) { |
| var sel = getBetween(this, ranges[i].from(), ranges[i].to()); |
| if (lineSep !== false) sel = sel.join(lineSep || "\n"); |
| parts[i] = sel; |
| } |
| return parts; |
| }, |
| replaceSelection: function(code, collapse, origin) { |
| var dup = []; |
| for (var i = 0; i < this.sel.ranges.length; i++) |
| dup[i] = code; |
| this.replaceSelections(dup, collapse, origin || "+input"); |
| }, |
| replaceSelections: docMethodOp(function(code, collapse, origin) { |
| var changes = [], sel = this.sel; |
| for (var i = 0; i < sel.ranges.length; i++) { |
| var range = sel.ranges[i]; |
| changes[i] = {from: range.from(), to: range.to(), text: splitLines(code[i]), origin: origin}; |
| } |
| var newSel = collapse && collapse != "end" && computeReplacedSel(this, changes, collapse); |
| for (var i = changes.length - 1; i >= 0; i--) |
| makeChange(this, changes[i]); |
| if (newSel) setSelectionReplaceHistory(this, newSel); |
| else if (this.cm) ensureCursorVisible(this.cm); |
| }), |
| undo: docMethodOp(function() {makeChangeFromHistory(this, "undo");}), |
| redo: docMethodOp(function() {makeChangeFromHistory(this, "redo");}), |
| undoSelection: docMethodOp(function() {makeChangeFromHistory(this, "undo", true);}), |
| redoSelection: docMethodOp(function() {makeChangeFromHistory(this, "redo", true);}), |
| |
| setExtending: function(val) {this.extend = val;}, |
| getExtending: function() {return this.extend;}, |
| |
| historySize: function() { |
| var hist = this.history, done = 0, undone = 0; |
| for (var i = 0; i < hist.done.length; i++) if (!hist.done[i].ranges) ++done; |
| for (var i = 0; i < hist.undone.length; i++) if (!hist.undone[i].ranges) ++undone; |
| return {undo: done, redo: undone}; |
| }, |
| clearHistory: function() {this.history = new History(this.history.maxGeneration);}, |
| |
| markClean: function() { |
| this.cleanGeneration = this.changeGeneration(true); |
| }, |
| changeGeneration: function(forceSplit) { |
| if (forceSplit) |
| this.history.lastOp = this.history.lastOrigin = null; |
| return this.history.generation; |
| }, |
| isClean: function (gen) { |
| return this.history.generation == (gen || this.cleanGeneration); |
| }, |
| |
| getHistory: function() { |
| return {done: copyHistoryArray(this.history.done), |
| undone: copyHistoryArray(this.history.undone)}; |
| }, |
| setHistory: function(histData) { |
| var hist = this.history = new History(this.history.maxGeneration); |
| hist.done = copyHistoryArray(histData.done.slice(0), null, true); |
| hist.undone = copyHistoryArray(histData.undone.slice(0), null, true); |
| }, |
| |
| markText: function(from, to, options) { |
| return markText(this, clipPos(this, from), clipPos(this, to), options, "range"); |
| }, |
| setBookmark: function(pos, options) { |
| var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options), |
| insertLeft: options && options.insertLeft, |
| clearWhenEmpty: false, shared: options && options.shared}; |
| pos = clipPos(this, pos); |
| return markText(this, pos, pos, realOpts, "bookmark"); |
| }, |
| findMarksAt: function(pos) { |
| pos = clipPos(this, pos); |
| var markers = [], spans = getLine(this, pos.line).markedSpans; |
| if (spans) for (var i = 0; i < spans.length; ++i) { |
| var span = spans[i]; |
| if ((span.from == null || span.from <= pos.ch) && |
| (span.to == null || span.to >= pos.ch)) |
| markers.push(span.marker.parent || span.marker); |
| } |
| return markers; |
| }, |
| findMarks: function(from, to, filter) { |
| from = clipPos(this, from); to = clipPos(this, to); |
| var found = [], lineNo = from.line; |
| this.iter(from.line, to.line + 1, function(line) { |
| var spans = line.markedSpans; |
| if (spans) for (var i = 0; i < spans.length; i++) { |
| var span = spans[i]; |
| if (!(lineNo == from.line && from.ch > span.to || |
| span.from == null && lineNo != from.line|| |
| lineNo == to.line && span.from > to.ch) && |
| (!filter || filter(span.marker))) |
| found.push(span.marker.parent || span.marker); |
| } |
| ++lineNo; |
| }); |
| return found; |
| }, |
| getAllMarks: function() { |
| var markers = []; |
| this.iter(function(line) { |
| var sps = line.markedSpans; |
| if (sps) for (var i = 0; i < sps.length; ++i) |
| if (sps[i].from != null) markers.push(sps[i].marker); |
| }); |
| return markers; |
| }, |
| |
| posFromIndex: function(off) { |
| var ch, lineNo = this.first; |
| this.iter(function(line) { |
| var sz = line.text.length + 1; |
| if (sz > off) { ch = off; return true; } |
| off -= sz; |
| ++lineNo; |
| }); |
| return clipPos(this, Pos(lineNo, ch)); |
| }, |
| indexFromPos: function (coords) { |
| coords = clipPos(this, coords); |
| var index = coords.ch; |
| if (coords.line < this.first || coords.ch < 0) return 0; |
| this.iter(this.first, coords.line, function (line) { |
| index += line.text.length + 1; |
| }); |
| return index; |
| }, |
| |
| copy: function(copyHistory) { |
| var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first); |
| doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft; |
| doc.sel = this.sel; |
| doc.extend = false; |
| if (copyHistory) { |
| doc.history.undoDepth = this.history.undoDepth; |
| doc.setHistory(this.getHistory()); |
| } |
| return doc; |
| }, |
| |
| linkedDoc: function(options) { |
| if (!options) options = {}; |
| var from = this.first, to = this.first + this.size; |
| if (options.from != null && options.from > from) from = options.from; |
| if (options.to != null && options.to < to) to = options.to; |
| var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from); |
| if (options.sharedHist) copy.history = this.history; |
| (this.linked || (this.linked = [])).push({doc: copy, sharedHist: options.sharedHist}); |
| copy.linked = [{doc: this, isParent: true, sharedHist: options.sharedHist}]; |
| copySharedMarkers(copy, findSharedMarkers(this)); |
| return copy; |
| }, |
| unlinkDoc: function(other) { |
| if (other instanceof CodeMirror) other = other.doc; |
| if (this.linked) for (var i = 0; i < this.linked.length; ++i) { |
| var link = this.linked[i]; |
| if (link.doc != other) continue; |
| this.linked.splice(i, 1); |
| other.unlinkDoc(this); |
| detachSharedMarkers(findSharedMarkers(this)); |
| break; |
| } |
| // If the histories were shared, split them again |
| if (other.history == this.history) { |
| var splitIds = [other.id]; |
| linkedDocs(other, function(doc) {splitIds.push(doc.id);}, true); |
| other.history = new History(null); |
| other.history.done = copyHistoryArray(this.history.done, splitIds); |
| other.history.undone = copyHistoryArray(this.history.undone, splitIds); |
| } |
| }, |
| iterLinkedDocs: function(f) {linkedDocs(this, f);}, |
| |
| getMode: function() {return this.mode;}, |
| getEditor: function() {return this.cm;} |
| }); |
| |
| // Public alias. |
| Doc.prototype.eachLine = Doc.prototype.iter; |
| |
| // Set up methods on CodeMirror's prototype to redirect to the editor's document. |
| var dontDelegate = "iter insert remove copy getEditor".split(" "); |
| for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0) |
| CodeMirror.prototype[prop] = (function(method) { |
| return function() {return method.apply(this.doc, arguments);}; |
| })(Doc.prototype[prop]); |
| |
| eventMixin(Doc); |
| |
| // Call f for all linked documents. |
| function linkedDocs(doc, f, sharedHistOnly) { |
| function propagate(doc, skip, sharedHist) { |
| if (doc.linked) for (var i = 0; i < doc.linked.length; ++i) { |
| var rel = doc.linked[i]; |
| if (rel.doc == skip) continue; |
| var shared = sharedHist && rel.sharedHist; |
| if (sharedHistOnly && !shared) continue; |
| f(rel.doc, shared); |
| propagate(rel.doc, doc, shared); |
| } |
| } |
| propagate(doc, null, true); |
| } |
| |
| // Attach a document to an editor. |
| function attachDoc(cm, doc) { |
| if (doc.cm) throw new Error("This document is already in use."); |
| cm.doc = doc; |
| doc.cm = cm; |
| estimateLineHeights(cm); |
| loadMode(cm); |
| if (!cm.options.lineWrapping) findMaxLine(cm); |
| cm.options.mode = doc.modeOption; |
| regChange(cm); |
| } |
| |
| // LINE UTILITIES |
| |
| // Find the line object corresponding to the given line number. |
| function getLine(doc, n) { |
| n -= doc.first; |
| if (n < 0 || n >= doc.size) throw new Error("There is no line " + (n + doc.first) + " in the document."); |
| for (var chunk = doc; !chunk.lines;) { |
| for (var i = 0;; ++i) { |
| var child = chunk.children[i], sz = child.chunkSize(); |
| if (n < sz) { chunk = child; break; } |
| n -= sz; |
| } |
| } |
| return chunk.lines[n]; |
| } |
| |
| // Get the part of a document between two positions, as an array of |
| // strings. |
| function getBetween(doc, start, end) { |
| var out = [], n = start.line; |
| doc.iter(start.line, end.line + 1, function(line) { |
| var text = line.text; |
| if (n == end.line) text = text.slice(0, end.ch); |
| if (n == start.line) text = text.slice(start.ch); |
| out.push(text); |
| ++n; |
| }); |
| return out; |
| } |
| // Get the lines between from and to, as array of strings. |
| function getLines(doc, from, to) { |
| var out = []; |
| doc.iter(from, to, function(line) { out.push(line.text); }); |
| return out; |
| } |
| |
| // Update the height of a line, propagating the height change |
| // upwards to parent nodes. |
| function updateLineHeight(line, height) { |
| var diff = height - line.height; |
| if (diff) for (var n = line; n; n = n.parent) n.height += diff; |
| } |
| |
| // Given a line object, find its line number by walking up through |
| // its parent links. |
| function lineNo(line) { |
| if (line.parent == null) return null; |
| var cur = line.parent, no = indexOf(cur.lines, line); |
| for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) { |
| for (var i = 0;; ++i) { |
| if (chunk.children[i] == cur) break; |
| no += chunk.children[i].chunkSize(); |
| } |
| } |
| return no + cur.first; |
| } |
| |
| // Find the line at the given vertical position, using the height |
| // information in the document tree. |
| function lineAtHeight(chunk, h) { |
| var n = chunk.first; |
| outer: do { |
| for (var i = 0; i < chunk.children.length; ++i) { |
| var child = chunk.children[i], ch = child.height; |
| if (h < ch) { chunk = child; continue outer; } |
| h -= ch; |
| n += child.chunkSize(); |
| } |
| return n; |
| } while (!chunk.lines); |
| for (var i = 0; i < chunk.lines.length; ++i) { |
| var line = chunk.lines[i], lh = line.height; |
| if (h < lh) break; |
| h -= lh; |
| } |
| return n + i; |
| } |
| |
| |
| // Find the height above the given line. |
| function heightAtLine(lineObj) { |
| lineObj = visualLine(lineObj); |
| |
| var h = 0, chunk = lineObj.parent; |
| for (var i = 0; i < chunk.lines.length; ++i) { |
| var line = chunk.lines[i]; |
| if (line == lineObj) break; |
| else h += line.height; |
| } |
| for (var p = chunk.parent; p; chunk = p, p = chunk.parent) { |
| for (var i = 0; i < p.children.length; ++i) { |
| var cur = p.children[i]; |
| if (cur == chunk) break; |
| else h += cur.height; |
| } |
| } |
| return h; |
| } |
| |
| // Get the bidi ordering for the given line (and cache it). Returns |
| // false for lines that are fully left-to-right, and an array of |
| // BidiSpan objects otherwise. |
| function getOrder(line) { |
| var order = line.order; |
| if (order == null) order = line.order = bidiOrdering(line.text); |
| return order; |
| } |
| |
| // HISTORY |
| |
| function History(startGen) { |
| // Arrays of change events and selections. Doing something adds an |
| // event to done and clears undo. Undoing moves events from done |
| // to undone, redoing moves them in the other direction. |
| this.done = []; this.undone = []; |
| this.undoDepth = Infinity; |
| // Used to track when changes can be merged into a single undo |
| // event |
| this.lastModTime = this.lastSelTime = 0; |
| this.lastOp = null; |
| this.lastOrigin = this.lastSelOrigin = null; |
| // Used by the isClean() method |
| this.generation = this.maxGeneration = startGen || 1; |
| } |
| |
| // Create a history change event from an updateDoc-style change |
| // object. |
| function historyChangeFromChange(doc, change) { |
| var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}; |
| attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); |
| linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true); |
| return histChange; |
| } |
| |
| // Pop all selection events off the end of a history array. Stop at |
| // a change event. |
| function clearSelectionEvents(array) { |
| while (array.length) { |
| var last = lst(array); |
| if (last.ranges) array.pop(); |
| else break; |
| } |
| } |
| |
| // Find the top change event in the history. Pop off selection |
| // events that are in the way. |
| function lastChangeEvent(hist, force) { |
| if (force) { |
| clearSelectionEvents(hist.done); |
| return lst(hist.done); |
| } else if (hist.done.length && !lst(hist.done).ranges) { |
| return lst(hist.done); |
| } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) { |
| hist.done.pop(); |
| return lst(hist.done); |
| } |
| } |
| |
| // Register a change in the history. Merges changes that are within |
| // a single operation, ore are close together with an origin that |
| // allows merging (starting with "+") into a single event. |
| function addChangeToHistory(doc, change, selAfter, opId) { |
| var hist = doc.history; |
| hist.undone.length = 0; |
| var time = +new Date, cur; |
| |
| if ((hist.lastOp == opId || |
| hist.lastOrigin == change.origin && change.origin && |
| ((change.origin.charAt(0) == "+" && doc.cm && hist.lastModTime > time - doc.cm.options.historyEventDelay) || |
| change.origin.charAt(0) == "*")) && |
| (cur = lastChangeEvent(hist, hist.lastOp == opId))) { |
| // Merge this change into the last event |
| var last = lst(cur.changes); |
| if (cmp(change.from, change.to) == 0 && cmp(change.from, last.to) == 0) { |
| // Optimized case for simple insertion -- don't want to add |
| // new changesets for every character typed |
| last.to = changeEnd(change); |
| } else { |
| // Add new sub-event |
| cur.changes.push(historyChangeFromChange(doc, change)); |
| } |
| } else { |
| // Can not be merged, start a new event. |
| var before = lst(hist.done); |
| if (!before || !before.ranges) |
| pushSelectionToHistory(doc.sel, hist.done); |
| cur = {changes: [historyChangeFromChange(doc, change)], |
| generation: hist.generation}; |
| hist.done.push(cur); |
| while (hist.done.length > hist.undoDepth) { |
| hist.done.shift(); |
| if (!hist.done[0].ranges) hist.done.shift(); |
| } |
| } |
| hist.done.push(selAfter); |
| hist.generation = ++hist.maxGeneration; |
| hist.lastModTime = hist.lastSelTime = time; |
| hist.lastOp = opId; |
| hist.lastOrigin = hist.lastSelOrigin = change.origin; |
| |
| if (!last) signal(doc, "historyAdded"); |
| } |
| |
| function selectionEventCanBeMerged(doc, origin, prev, sel) { |
| var ch = origin.charAt(0); |
| return ch == "*" || |
| ch == "+" && |
| prev.ranges.length == sel.ranges.length && |
| prev.somethingSelected() == sel.somethingSelected() && |
| new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500); |
| } |
| |
| // Called whenever the selection changes, sets the new selection as |
| // the pending selection in the history, and pushes the old pending |
| // selection into the 'done' array when it was significantly |
| // different (in number of selected ranges, emptiness, or time). |
| function addSelectionToHistory(doc, sel, opId, options) { |
| var hist = doc.history, origin = options && options.origin; |
| |
| // A new event is started when the previous origin does not match |
| // the current, or the origins don't allow matching. Origins |
| // starting with * are always merged, those starting with + are |
| // merged when similar and close together in time. |
| if (opId == hist.lastOp || |
| (origin && hist.lastSelOrigin == origin && |
| (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin || |
| selectionEventCanBeMerged(doc, origin, lst(hist.done), sel)))) |
| hist.done[hist.done.length - 1] = sel; |
| else |
| pushSelectionToHistory(sel, hist.done); |
| |
| hist.lastSelTime = +new Date; |
| hist.lastSelOrigin = origin; |
| hist.lastOp = opId; |
| if (options && options.clearRedo !== false) |
| clearSelectionEvents(hist.undone); |
| } |
| |
| function pushSelectionToHistory(sel, dest) { |
| var top = lst(dest); |
| if (!(top && top.ranges && top.equals(sel))) |
| dest.push(sel); |
| } |
| |
| // Used to store marked span information in the history. |
| function attachLocalSpans(doc, change, from, to) { |
| var existing = change["spans_" + doc.id], n = 0; |
| doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) { |
| if (line.markedSpans) |
| (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; |
| ++n; |
| }); |
| } |
| |
| // When un/re-doing restores text containing marked spans, those |
| // that have been explicitly cleared should not be restored. |
| function removeClearedSpans(spans) { |
| if (!spans) return null; |
| for (var i = 0, out; i < spans.length; ++i) { |
| if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); } |
| else if (out) out.push(spans[i]); |
| } |
| return !out ? spans : out.length ? out : null; |
| } |
| |
| // Retrieve and filter the old marked spans stored in a change event. |
| function getOldSpans(doc, change) { |
| var found = change["spans_" + doc.id]; |
| if (!found) return null; |
| for (var i = 0, nw = []; i < change.text.length; ++i) |
| nw.push(removeClearedSpans(found[i])); |
| return nw; |
| } |
| |
| // Used both to provide a JSON-safe object in .getHistory, and, when |
| // detaching a document, to split the history in two |
| function copyHistoryArray(events, newGroup, instantiateSel) { |
| for (var i = 0, copy = []; i < events.length; ++i) { |
| var event = events[i]; |
| if (event.ranges) { |
| copy.push(instantiateSel ? Selection.prototype.deepCopy.call(event) : event); |
| continue; |
| } |
| var changes = event.changes, newChanges = []; |
| copy.push({changes: newChanges}); |
| for (var j = 0; j < changes.length; ++j) { |
| var change = changes[j], m; |
| newChanges.push({from: change.from, to: change.to, text: change.text}); |
| if (newGroup) for (var prop in change) if (m = prop.match(/^spans_(\d+)$/)) { |
| if (indexOf(newGroup, Number(m[1])) > -1) { |
| lst(newChanges)[prop] = change[prop]; |
| delete change[prop]; |
| } |
| } |
| } |
| } |
| return copy; |
| } |
| |
| // Rebasing/resetting history to deal with externally-sourced changes |
| |
| function rebaseHistSelSingle(pos, from, to, diff) { |
| if (to < pos.line) { |
| pos.line += diff; |
| } else if (from < pos.line) { |
| pos.line = from; |
| pos.ch = 0; |
| } |
| } |
| |
| // Tries to rebase an array of history events given a change in the |
| // document. If the change touches the same lines as the event, the |
| // event, and everything 'behind' it, is discarded. If the change is |
| // before the event, the event's positions are updated. Uses a |
| // copy-on-write scheme for the positions, to avoid having to |
| // reallocate them all on every rebase, but also avoid problems with |
| // shared position objects being unsafely updated. |
| function rebaseHistArray(array, from, to, diff) { |
| for (var i = 0; i < array.length; ++i) { |
| var sub = array[i], ok = true; |
| if (sub.ranges) { |
| if (!sub.copied) { sub = array[i] = sub.deepCopy(); sub.copied = true; } |
| for (var j = 0; j < sub.ranges.length; j++) { |
| rebaseHistSelSingle(sub.ranges[j].anchor, from, to, diff); |
| rebaseHistSelSingle(sub.ranges[j].head, from, to, diff); |
| } |
| continue; |
| } |
| for (var j = 0; j < sub.changes.length; ++j) { |
| var cur = sub.changes[j]; |
| if (to < cur.from.line) { |
| cur.from = Pos(cur.from.line + diff, cur.from.ch); |
| cur.to = Pos(cur.to.line + diff, cur.to.ch); |
| } else if (from <= cur.to.line) { |
| ok = false; |
| break; |
| } |
| } |
| if (!ok) { |
| array.splice(0, i + 1); |
| i = 0; |
| } |
| } |
| } |
| |
| function rebaseHist(hist, change) { |
| var from = change.from.line, to = change.to.line, diff = change.text.length - (to - from) - 1; |
| rebaseHistArray(hist.done, from, to, diff); |
| rebaseHistArray(hist.undone, from, to, diff); |
| } |
| |
| // EVENT UTILITIES |
| |
| // Due to the fact that we still support jurassic IE versions, some |
| // compatibility wrappers are needed. |
| |
| var e_preventDefault = CodeMirror.e_preventDefault = function(e) { |
| if (e.preventDefault) e.preventDefault(); |
| else e.returnValue = false; |
| }; |
| var e_stopPropagation = CodeMirror.e_stopPropagation = function(e) { |
| if (e.stopPropagation) e.stopPropagation(); |
| else e.cancelBubble = true; |
| }; |
| function e_defaultPrevented(e) { |
| return e.defaultPrevented != null ? e.defaultPrevented : e.returnValue == false; |
| } |
| var e_stop = CodeMirror.e_stop = function(e) {e_preventDefault(e); e_stopPropagation(e);}; |
| |
| function e_target(e) {return e.target || e.srcElement;} |
| function e_button(e) { |
| var b = e.which; |
| if (b == null) { |
| if (e.button & 1) b = 1; |
| else if (e.button & 2) b = 3; |
| else if (e.button & 4) b = 2; |
| } |
| if (mac && e.ctrlKey && b == 1) b = 3; |
| return b; |
| } |
| |
| // EVENT HANDLING |
| |
| // Lightweight event framework. on/off also work on DOM nodes, |
| // registering native DOM handlers. |
| |
| var on = CodeMirror.on = function(emitter, type, f) { |
| if (emitter.addEventListener) |
| emitter.addEventListener(type, f, false); |
| else if (emitter.attachEvent) |
| emitter.attachEvent("on" + type, f); |
| else { |
| var map = emitter._handlers || (emitter._handlers = {}); |
| var arr = map[type] || (map[type] = []); |
| arr.push(f); |
| } |
| }; |
| |
| var off = CodeMirror.off = function(emitter, type, f) { |
| if (emitter.removeEventListener) |
| emitter.removeEventListener(type, f, false); |
| else if (emitter.detachEvent) |
| emitter.detachEvent("on" + type, f); |
| else { |
| var arr = emitter._handlers && emitter._handlers[type]; |
| if (!arr) return; |
| for (var i = 0; i < arr.length; ++i) |
| if (arr[i] == f) { arr.splice(i, 1); break; } |
| } |
| }; |
| |
| var signal = CodeMirror.signal = function(emitter, type /*, values...*/) { |
| var arr = emitter._handlers && emitter._handlers[type]; |
| if (!arr) return; |
| var args = Array.prototype.slice.call(arguments, 2); |
| for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args); |
| }; |
| |
| // Often, we want to signal events at a point where we are in the |
| // middle of some work, but don't want the handler to start calling |
| // other methods on the editor, which might be in an inconsistent |
| // state or simply not expect any other events to happen. |
| // signalLater looks whether there are any handlers, and schedules |
| // them to be executed when the last operation ends, or, if no |
| // operation is active, when a timeout fires. |
| var delayedCallbacks, delayedCallbackDepth = 0; |
| function signalLater(emitter, type /*, values...*/) { |
| var arr = emitter._handlers && emitter._handlers[type]; |
| if (!arr) return; |
| var args = Array.prototype.slice.call(arguments, 2); |
| if (!delayedCallbacks) { |
| ++delayedCallbackDepth; |
| delayedCallbacks = []; |
| setTimeout(fireDelayed, 0); |
| } |
| function bnd(f) {return function(){f.apply(null, args);};}; |
| for (var i = 0; i < arr.length; ++i) |
| delayedCallbacks.push(bnd(arr[i])); |
| } |
| |
| function fireDelayed() { |
| --delayedCallbackDepth; |
| var delayed = delayedCallbacks; |
| delayedCallbacks = null; |
| for (var i = 0; i < delayed.length; ++i) delayed[i](); |
| } |
| |
| // The DOM events that CodeMirror handles can be overridden by |
| // registering a (non-DOM) handler on the editor for the event name, |
| // and preventDefault-ing the event in that handler. |
| function signalDOMEvent(cm, e, override) { |
| signal(cm, override || e.type, cm, e); |
| return e_defaultPrevented(e) || e.codemirrorIgnore; |
| } |
| |
| function signalCursorActivity(cm) { |
| var arr = cm._handlers && cm._handlers.cursorActivity; |
| if (!arr) return; |
| var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []); |
| for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1) |
| set.push(arr[i]); |
| } |
| |
| function hasHandler(emitter, type) { |
| var arr = emitter._handlers && emitter._handlers[type]; |
| return arr && arr.length > 0; |
| } |
| |
| // Add on and off methods to a constructor's prototype, to make |
| // registering events on such objects more convenient. |
| function eventMixin(ctor) { |
| ctor.prototype.on = function(type, f) {on(this, type, f);}; |
| ctor.prototype.off = function(type, f) {off(this, type, f);}; |
| } |
| |
| // MISC UTILITIES |
| |
| // Number of pixels added to scroller and sizer to hide scrollbar |
| var scrollerCutOff = 30; |
| |
| // Returned or thrown by various protocols to signal 'I'm not |
| // handling this'. |
| var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}}; |
| |
| // Reused option objects for setSelection & friends |
| var sel_dontScroll = {scroll: false}, sel_mouse = {origin: "*mouse"}, sel_move = {origin: "+move"}; |
| |
| function Delayed() {this.id = null;} |
| Delayed.prototype.set = function(ms, f) { |
| clearTimeout(this.id); |
| this.id = setTimeout(f, ms); |
| }; |
| |
| // Counts the column offset in a string, taking tabs into account. |
| // Used mostly to find indentation. |
| var countColumn = CodeMirror.countColumn = function(string, end, tabSize, startIndex, startValue) { |
| if (end == null) { |
| end = string.search(/[^\s\u00a0]/); |
| if (end == -1) end = string.length; |
| } |
| for (var i = startIndex || 0, n = startValue || 0;;) { |
| var nextTab = string.indexOf("\t", i); |
| if (nextTab < 0 || nextTab >= end) |
| return n + (end - i); |
| n += nextTab - i; |
| n += tabSize - (n % tabSize); |
| i = nextTab + 1; |
| } |
| }; |
| |
| // The inverse of countColumn -- find the offset that corresponds to |
| // a particular column. |
| function findColumn(string, goal, tabSize) { |
| for (var pos = 0, col = 0;;) { |
| var nextTab = string.indexOf("\t", pos); |
| if (nextTab == -1) nextTab = string.length; |
| var skipped = nextTab - pos; |
| if (nextTab == string.length || col + skipped >= goal) |
| return pos + Math.min(skipped, goal - col); |
| col += nextTab - pos; |
| col += tabSize - (col % tabSize); |
| pos = nextTab + 1; |
| if (col >= goal) return pos; |
| } |
| } |
| |
| var spaceStrs = [""]; |
| function spaceStr(n) { |
| while (spaceStrs.length <= n) |
| spaceStrs.push(lst(spaceStrs) + " "); |
| return spaceStrs[n]; |
| } |
| |
| function lst(arr) { return arr[arr.length-1]; } |
| |
| var selectInput = function(node) { node.select(); }; |
| if (ios) // Mobile Safari apparently has a bug where select() is broken. |
| selectInput = function(node) { node.selectionStart = 0; node.selectionEnd = node.value.length; }; |
| else if (ie) // Suppress mysterious IE10 errors |
| selectInput = function(node) { try { node.select(); } catch(_e) {} }; |
| |
| function indexOf(array, elt) { |
| for (var i = 0; i < array.length; ++i) |
| if (array[i] == elt) return i; |
| return -1; |
| } |
| if ([].indexOf) indexOf = function(array, elt) { return array.indexOf(elt); }; |
| function map(array, f) { |
| var out = []; |
| for (var i = 0; i < array.length; i++) out[i] = f(array[i], i); |
| return out; |
| } |
| if ([].map) map = function(array, f) { return array.map(f); }; |
| |
| function createObj(base, props) { |
| var inst; |
| if (Object.create) { |
| inst = Object.create(base); |
| } else { |
| var ctor = function() {}; |
| ctor.prototype = base; |
| inst = new ctor(); |
| } |
| if (props) copyObj(props, inst); |
| return inst; |
| }; |
| |
| function copyObj(obj, target, overwrite) { |
| if (!target) target = {}; |
| for (var prop in obj) |
| if (obj.hasOwnProperty(prop) && (overwrite !== false || !target.hasOwnProperty(prop))) |
| target[prop] = obj[prop]; |
| return target; |
| } |
| |
| function bind(f) { |
| var args = Array.prototype.slice.call(arguments, 1); |
| return function(){return f.apply(null, args);}; |
| } |
| |
| var nonASCIISingleCaseWordChar = /[\u00df\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/; |
| var isWordChar = CodeMirror.isWordChar = function(ch) { |
| return /\w/.test(ch) || ch > "\x80" && |
| (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch)); |
| }; |
| |
| function isEmpty(obj) { |
| for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false; |
| return true; |
| } |
| |
| // Extending unicode characters. A series of a non-extending char + |
| // any number of extending chars is treated as a single unit as far |
| // as editing and measuring is concerned. This is not fully correct, |
| // since some scripts/fonts/browsers also treat other configurations |
| // of code points as a group. |
| var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/; |
| function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); } |
| |
| // DOM UTILITIES |
| |
| function elt(tag, content, className, style) { |
| var e = document.createElement(tag); |
| if (className) e.className = className; |
| if (style) e.style.cssText = style; |
| if (typeof content == "string") e.appendChild(document.createTextNode(content)); |
| else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]); |
| return e; |
| } |
| |
| var range; |
| if (document.createRange) range = function(node, start, end) { |
| var r = document.createRange(); |
| r.setEnd(node, end); |
| r.setStart(node, start); |
| return r; |
| }; |
| else range = function(node, start, end) { |
| var r = document.body.createTextRange(); |
| r.moveToElementText(node.parentNode); |
| r.collapse(true); |
| r.moveEnd("character", end); |
| r.moveStart("character", start); |
| return r; |
| }; |
| |
| function removeChildren(e) { |
| for (var count = e.childNodes.length; count > 0; --count) |
| e.removeChild(e.firstChild); |
| return e; |
| } |
| |
| function removeChildrenAndAdd(parent, e) { |
| return removeChildren(parent).appendChild(e); |
| } |
| |
| function contains(parent, child) { |
| if (parent.contains) |
| return parent.contains(child); |
| while (child = child.parentNode) |
| if (child == parent) return true; |
| } |
| |
| function activeElt() { return document.activeElement; } |
| // Older versions of IE throws unspecified error when touching |
| // document.activeElement in some cases (during loading, in iframe) |
| if (ie_upto10) activeElt = function() { |
| try { return document.activeElement; } |
| catch(e) { return document.body; } |
| }; |
| |
| function classTest(cls) { return new RegExp("\\b" + cls + "\\b\\s*"); } |
| function rmClass(node, cls) { |
| var test = classTest(cls); |
| if (test.test(node.className)) node.className = node.className.replace(test, ""); |
| } |
| function addClass(node, cls) { |
| if (!classTest(cls).test(node.className)) node.className += " " + cls; |
| } |
| function joinClasses(a, b) { |
| var as = a.split(" "); |
| for (var i = 0; i < as.length; i++) |
| if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i]; |
| return b; |
| } |
| |
| // FEATURE DETECTION |
| |
| // Detect drag-and-drop |
| var dragAndDrop = function() { |
| // There is *some* kind of drag-and-drop support in IE6-8, but I |
| // couldn't get it to work yet. |
| if (ie_upto8) return false; |
| var div = elt('div'); |
| return "draggable" in div || "dragDrop" in div; |
| }(); |
| |
| var knownScrollbarWidth; |
| function scrollbarWidth(measure) { |
| if (knownScrollbarWidth != null) return knownScrollbarWidth; |
| var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll"); |
| removeChildrenAndAdd(measure, test); |
| if (test.offsetWidth) |
| knownScrollbarWidth = test.offsetHeight - test.clientHeight; |
| return knownScrollbarWidth || 0; |
| } |
| |
| var zwspSupported; |
| function zeroWidthElement(measure) { |
| if (zwspSupported == null) { |
| var test = elt("span", "\u200b"); |
| removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")])); |
| if (measure.firstChild.offsetHeight != 0) |
| zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_upto7; |
| } |
| if (zwspSupported) return elt("span", "\u200b"); |
| else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px"); |
| } |
| |
| // Feature-detect IE's crummy client rect reporting for bidi text |
| var badBidiRects; |
| function hasBadBidiRects(measure) { |
| if (badBidiRects != null) return badBidiRects; |
| var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA")); |
| var r0 = range(txt, 0, 1).getBoundingClientRect(); |
| if (r0.left == r0.right) return false; |
| var r1 = range(txt, 1, 2).getBoundingClientRect(); |
| return badBidiRects = (r1.right - r0.right < 3); |
| } |
| |
| // See if "".split is the broken IE version, if so, provide an |
| // alternative way to split lines. |
| var splitLines = CodeMirror.splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) { |
| var pos = 0, result = [], l = string.length; |
| while (pos <= l) { |
| var nl = string.indexOf("\n", pos); |
| if (nl == -1) nl = string.length; |
| var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl); |
| var rt = line.indexOf("\r"); |
| if (rt != -1) { |
| result.push(line.slice(0, rt)); |
| pos += rt + 1; |
| } else { |
| result.push(line); |
| pos = nl + 1; |
| } |
| } |
| return result; |
| } : function(string){return string.split(/\r\n?|\n/);}; |
| |
| var hasSelection = window.getSelection ? function(te) { |
| try { return te.selectionStart != te.selectionEnd; } |
| catch(e) { return false; } |
| } : function(te) { |
| try {var range = te.ownerDocument.selection.createRange();} |
| catch(e) {} |
| if (!range || range.parentElement() != te) return false; |
| return range.compareEndPoints("StartToEnd", range) != 0; |
| }; |
| |
| var hasCopyEvent = (function() { |
| var e = elt("div"); |
| if ("oncopy" in e) return true; |
| e.setAttribute("oncopy", "return;"); |
| return typeof e.oncopy == "function"; |
| })(); |
| |
| // KEY NAMES |
| |
| var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt", |
| 19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End", |
| 36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert", |
| 46: "Delete", 59: ";", 61: "=", 91: "Mod", 92: "Mod", 93: "Mod", 107: "=", 109: "-", 127: "Delete", |
| 173: "-", 186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\", |
| 221: "]", 222: "'", 63232: "Up", 63233: "Down", 63234: "Left", 63235: "Right", 63272: "Delete", |
| 63273: "Home", 63275: "End", 63276: "PageUp", 63277: "PageDown", 63302: "Insert"}; |
| CodeMirror.keyNames = keyNames; |
| (function() { |
| // Number keys |
| for (var i = 0; i < 10; i++) keyNames[i + 48] = keyNames[i + 96] = String(i); |
| // Alphabetic keys |
| for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i); |
| // Function keys |
| for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i; |
| })(); |
| |
| // BIDI HELPERS |
| |
| function iterateBidiSections(order, from, to, f) { |
| if (!order) return f(from, to, "ltr"); |
| var found = false; |
| for (var i = 0; i < order.length; ++i) { |
| var part = order[i]; |
| if (part.from < to && part.to > from || from == to && part.to == from) { |
| f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr"); |
| found = true; |
| } |
| } |
| if (!found) f(from, to, "ltr"); |
| } |
| |
| function bidiLeft(part) { return part.level % 2 ? part.to : part.from; } |
| function bidiRight(part) { return part.level % 2 ? part.from : part.to; } |
| |
| function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; } |
| function lineRight(line) { |
| var order = getOrder(line); |
| if (!order) return line.text.length; |
| return bidiRight(lst(order)); |
| } |
| |
| function lineStart(cm, lineN) { |
| var line = getLine(cm.doc, lineN); |
| var visual = visualLine(line); |
| if (visual != line) lineN = lineNo(visual); |
| var order = getOrder(visual); |
| var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual); |
| return Pos(lineN, ch); |
| } |
| function lineEnd(cm, lineN) { |
| var merged, line = getLine(cm.doc, lineN); |
| while (merged = collapsedSpanAtEnd(line)) { |
| line = merged.find(1, true).line; |
| lineN = null; |
| } |
| var order = getOrder(line); |
| var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line); |
| return Pos(lineN == null ? lineNo(line) : lineN, ch); |
| } |
| |
| function compareBidiLevel(order, a, b) { |
| var linedir = order[0].level; |
| if (a == linedir) return true; |
| if (b == linedir) return false; |
| return a < b; |
| } |
| var bidiOther; |
| function getBidiPartAt(order, pos) { |
| bidiOther = null; |
| for (var i = 0, found; i < order.length; ++i) { |
| var cur = order[i]; |
| if (cur.from < pos && cur.to > pos) return i; |
| if ((cur.from == pos || cur.to == pos)) { |
| if (found == null) { |
| found = i; |
| } else if (compareBidiLevel(order, cur.level, order[found].level)) { |
| if (cur.from != cur.to) bidiOther = found; |
| return i; |
| } else { |
| if (cur.from != cur.to) bidiOther = i; |
| return found; |
| } |
| } |
| } |
| return found; |
| } |
| |
| function moveInLine(line, pos, dir, byUnit) { |
| if (!byUnit) return pos + dir; |
| do pos += dir; |
| while (pos > 0 && isExtendingChar(line.text.charAt(pos))); |
| return pos; |
| } |
| |
| // This is needed in order to move 'visually' through bi-directional |
| // text -- i.e., pressing left should make the cursor go left, even |
| // when in RTL text. The tricky part is the 'jumps', where RTL and |
| // LTR text touch each other. This often requires the cursor offset |
| // to move more than one unit, in order to visually move one unit. |
| function moveVisually(line, start, dir, byUnit) { |
| var bidi = getOrder(line); |
| if (!bidi) return moveLogically(line, start, dir, byUnit); |
| var pos = getBidiPartAt(bidi, start), part = bidi[pos]; |
| var target = moveInLine(line, start, part.level % 2 ? -dir : dir, byUnit); |
| |
| for (;;) { |
| if (target > part.from && target < part.to) return target; |
| if (target == part.from || target == part.to) { |
| if (getBidiPartAt(bidi, target) == pos) return target; |
| part = bidi[pos += dir]; |
| return (dir > 0) == part.level % 2 ? part.to : part.from; |
| } else { |
| part = bidi[pos += dir]; |
| if (!part) return null; |
| if ((dir > 0) == part.level % 2) |
| target = moveInLine(line, part.to, -1, byUnit); |
| else |
| target = moveInLine(line, part.from, 1, byUnit); |
| } |
| } |
| } |
| |
| function moveLogically(line, start, dir, byUnit) { |
| var target = start + dir; |
| if (byUnit) while (target > 0 && isExtendingChar(line.text.charAt(target))) target += dir; |
| return target < 0 || target > line.text.length ? null : target; |
| } |
| |
| // Bidirectional ordering algorithm |
| // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm |
| // that this (partially) implements. |
| |
| // One-char codes used for character types: |
| // L (L): Left-to-Right |
| // R (R): Right-to-Left |
| // r (AL): Right-to-Left Arabic |
| // 1 (EN): European Number |
| // + (ES): European Number Separator |
| // % (ET): European Number Terminator |
| // n (AN): Arabic Number |
| // , (CS): Common Number Separator |
| // m (NSM): Non-Spacing Mark |
| // b (BN): Boundary Neutral |
| // s (B): Paragraph Separator |
| // t (S): Segment Separator |
| // w (WS): Whitespace |
| // N (ON): Other Neutrals |
| |
| // Returns null if characters are ordered as they appear |
| // (left-to-right), or an array of sections ({from, to, level} |
| // objects) in the order in which they occur visually. |
| var bidiOrdering = (function() { |
| // Character types for codepoints 0 to 0xff |
| var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLN"; |
| // Character types for codepoints 0x600 to 0x6ff |
| var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmm"; |
| function charType(code) { |
| if (code <= 0xf7) return lowTypes.charAt(code); |
| else if (0x590 <= code && code <= 0x5f4) return "R"; |
| else if (0x600 <= code && code <= 0x6ed) return arabicTypes.charAt(code - 0x600); |
| else if (0x6ee <= code && code <= 0x8ac) return "r"; |
| else if (0x2000 <= code && code <= 0x200b) return "w"; |
| else if (code == 0x200c) return "b"; |
| else return "L"; |
| } |
| |
| var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/; |
| var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/; |
| // Browsers seem to always treat the boundaries of block elements as being L. |
| var outerType = "L"; |
| |
| function BidiSpan(level, from, to) { |
| this.level = level; |
| this.from = from; this.to = to; |
| } |
| |
| return function(str) { |
| if (!bidiRE.test(str)) return false; |
| var len = str.length, types = []; |
| for (var i = 0, type; i < len; ++i) |
| types.push(type = charType(str.charCodeAt(i))); |
| |
| // W1. Examine each non-spacing mark (NSM) in the level run, and |
| // change the type of the NSM to the type of the previous |
| // character. If the NSM is at the start of the level run, it will |
| // get the type of sor. |
| for (var i = 0, prev = outerType; i < len; ++i) { |
| var type = types[i]; |
| if (type == "m") types[i] = prev; |
| else prev = type; |
| } |
| |
| // W2. Search backwards from each instance of a European number |
| // until the first strong type (R, L, AL, or sor) is found. If an |
| // AL is found, change the type of the European number to Arabic |
| // number. |
| // W3. Change all ALs to R. |
| for (var i = 0, cur = outerType; i < len; ++i) { |
| var type = types[i]; |
| if (type == "1" && cur == "r") types[i] = "n"; |
| else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; } |
| } |
| |
| // W4. A single European separator between two European numbers |
| // changes to a European number. A single common separator between |
| // two numbers of the same type changes to that type. |
| for (var i = 1, prev = types[0]; i < len - 1; ++i) { |
| var type = types[i]; |
| if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1"; |
| else if (type == "," && prev == types[i+1] && |
| (prev == "1" || prev == "n")) types[i] = prev; |
| prev = type; |
| } |
| |
| // W5. A sequence of European terminators adjacent to European |
| // numbers changes to all European numbers. |
| // W6. Otherwise, separators and terminators change to Other |
| // Neutral. |
| for (var i = 0; i < len; ++i) { |
| var type = types[i]; |
| if (type == ",") types[i] = "N"; |
| else if (type == "%") { |
| for (var end = i + 1; end < len && types[end] == "%"; ++end) {} |
| var replace = (i && types[i-1] == "!") || (end < len && types[end] == "1") ? "1" : "N"; |
| for (var j = i; j < end; ++j) types[j] = replace; |
| i = end - 1; |
| } |
| } |
| |
| // W7. Search backwards from each instance of a European number |
| // until the first strong type (R, L, or sor) is found. If an L is |
| // found, then change the type of the European number to L. |
| for (var i = 0, cur = outerType; i < len; ++i) { |
| var type = types[i]; |
| if (cur == "L" && type == "1") types[i] = "L"; |
| else if (isStrong.test(type)) cur = type; |
| } |
| |
| // N1. A sequence of neutrals takes the direction of the |
| // surrounding strong text if the text on both sides has the same |
| // direction. European and Arabic numbers act as if they were R in |
| // terms of their influence on neutrals. Start-of-level-run (sor) |
| // and end-of-level-run (eor) are used at level run boundaries. |
| // N2. Any remaining neutrals take the embedding direction. |
| for (var i = 0; i < len; ++i) { |
| if (isNeutral.test(types[i])) { |
| for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {} |
| var before = (i ? types[i-1] : outerType) == "L"; |
| var after = (end < len ? types[end] : outerType) == "L"; |
| var replace = before || after ? "L" : "R"; |
| for (var j = i; j < end; ++j) types[j] = replace; |
| i = end - 1; |
| } |
| } |
| |
| // Here we depart from the documented algorithm, in order to avoid |
| // building up an actual levels array. Since there are only three |
| // levels (0, 1, 2) in an implementation that doesn't take |
| // explicit embedding into account, we can build up the order on |
| // the fly, without following the level-based algorithm. |
| var order = [], m; |
| for (var i = 0; i < len;) { |
| if (countsAsLeft.test(types[i])) { |
| var start = i; |
| for (++i; i < len && countsAsLeft.test(types[i]); ++i) {} |
| order.push(new BidiSpan(0, start, i)); |
| } else { |
| var pos = i, at = order.length; |
| for (++i; i < len && types[i] != "L"; ++i) {} |
| for (var j = pos; j < i;) { |
| if (countsAsNum.test(types[j])) { |
| if (pos < j) order.splice(at, 0, new BidiSpan(1, pos, j)); |
| var nstart = j; |
| for (++j; j < i && countsAsNum.test(types[j]); ++j) {} |
| order.splice(at, 0, new BidiSpan(2, nstart, j)); |
| pos = j; |
| } else ++j; |
| } |
| if (pos < i) order.splice(at, 0, new BidiSpan(1, pos, i)); |
| } |
| } |
| if (order[0].level == 1 && (m = str.match(/^\s+/))) { |
| order[0].from = m[0].length; |
| order.unshift(new BidiSpan(0, 0, m[0].length)); |
| } |
| if (lst(order).level == 1 && (m = str.match(/\s+$/))) { |
| lst(order).to -= m[0].length; |
| order.push(new BidiSpan(0, len - m[0].length, len)); |
| } |
| if (order[0].level != lst(order).level) |
| order.push(new BidiSpan(order[0].level, len, len)); |
| |
| return order; |
| }; |
| })(); |
| |
| // THE END |
| |
| CodeMirror.version = "4.1.0"; |
| |
| return CodeMirror; |
| }); |