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// CodeMirror, copyright (c) by Marijn Haverbeke and others // Distributed under an MIT license: http://codemirror.net/LICENSE // 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 || window).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 userAgent = navigator.userAgent; var platform = navigator.platform; var gecko = /gecko\/\d/i.test(userAgent); var ie_upto10 = /MSIE \d/.test(userAgent); var ie_11up = /Trident\/(?:[7-9]|\d{2,})\..*rv:(\d+)/.exec(userAgent); var ie = ie_upto10 || ie_11up; var ie_version = ie && (ie_upto10 ? document.documentMode || 6 : ie_11up[1]); var webkit = /WebKit\//.test(userAgent); var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(userAgent); var chrome = /Chrome\//.test(userAgent); var presto = /Opera\//.test(userAgent); var safari = /Apple Computer/.test(navigator.vendor); var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(userAgent); var phantom = /PhantomJS/.test(userAgent); var ios = /AppleWebKit/.test(userAgent) && /Mobile\/\w+/.test(userAgent); // This is woefully incomplete. Suggestions for alternative methods welcome. var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|Opera Mobi|IEMobile/i.test(userAgent); var mac = ios || /Mac/.test(platform); var chromeOS = /\bCrOS\b/.test(userAgent); var windows = /win/i.test(platform); var presto_version = presto && userAgent.match(/Version\/(\d*\.\d*)/); if (presto_version) presto_version = Number(presto_version[1]); if (presto_version && presto_version >= 15) { presto = false; webkit = true; } // Some browsers use the wrong event properties to signal cmd/ctrl on OS X var flipCtrlCmd = mac && (qtwebkit || presto && (presto_version == null || presto_version < 12.11)); var captureRightClick = gecko || (ie && ie_version >= 9); // 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 ? copyObj(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, null, options.lineSeparator); this.doc = doc; var input = new CodeMirror.inputStyles[options.inputStyle](this); var display = this.display = new Display(place, doc, input); display.wrapper.CodeMirror = this; updateGutters(this); themeChanged(this); if (options.lineWrapping) this.display.wrapper.className += " CodeMirror-wrap"; if (options.autofocus && !mobile) display.input.focus(); initScrollbars(this); this.state = { keyMaps: [], // stores maps added by addKeyMap overlays: [], // highlighting overlays, as added by addOverlay modeGen: 0, // bumped when mode/overlay changes, used to invalidate highlighting info overwrite: false, delayingBlurEvent: false, focused: false, suppressEdits: false, // used to disable editing during key handlers when in readOnly mode pasteIncoming: false, cutIncoming: false, // help recognize paste/cut edits in input.poll selectingText: false, draggingText: false, highlight: new Delayed(), // stores highlight worker timeout keySeq: null, // Unfinished key sequence specialChars: null }; var cm = this; // Override magic textarea content restore that IE sometimes does // on our hidden textarea on reload if (ie && ie_version < 11) setTimeout(function() { cm.display.input.reset(true); }, 20); registerEventHandlers(this); ensureGlobalHandlers(); startOperation(this); this.curOp.forceUpdate = true; attachDoc(this, doc); if ((options.autofocus && !mobile) || cm.hasFocus()) setTimeout(bind(onFocus, this), 20); else onBlur(this); for (var opt in optionHandlers) if (optionHandlers.hasOwnProperty(opt)) optionHandlers[opt](this, options[opt], Init); maybeUpdateLineNumberWidth(this); if (options.finishInit) options.finishInit(this); for (var i = 0; i < initHooks.length; ++i) initHooks[i](this); endOperation(this); // Suppress optimizelegibility in Webkit, since it breaks text // measuring on line wrapping boundaries. if (webkit && options.lineWrapping && getComputedStyle(display.lineDiv).textRendering == "optimizelegibility") display.lineDiv.style.textRendering = "auto"; } // 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, input) { var d = this; this.input = input; // Covers bottom-right square when both scrollbars are present. d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler"); d.scrollbarFiller.setAttribute("cm-not-content", "true"); // Covers bottom of gutter when coverGutterNextToScrollbar is on // and h scrollbar is present. d.gutterFiller = elt("div", null, "CodeMirror-gutter-filler"); d.gutterFiller.setAttribute("cm-not-content", "true"); // Will contain the actual code, positioned to cover the viewport. d.lineDiv = 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"); d.sizerWidth = null; // Behavior of elts with overflow: auto and padding is // inconsistent across browsers. This is used to ensure the // scrollable area is big enough. d.heightForcer = elt("div", null, null, "position: absolute; height: " + scrollerGap + "px; width: 1px;"); // Will contain the gutters, if any. d.gutters = elt("div", null, "CodeMirror-gutters"); d.lineGutter = null; // Actual scrollable element. d.scroller = elt("div", [d.sizer, d.heightForcer, d.gutters], "CodeMirror-scroll"); d.scroller.setAttribute("tabIndex", "-1"); // The element in which the editor lives. d.wrapper = elt("div", [d.scrollbarFiller, d.gutterFiller, d.scroller], "CodeMirror"); // Work around IE7 z-index bug (not perfect, hence IE7 not really being supported) if (ie && ie_version < 8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; } if (!webkit && !(gecko && mobile)) d.scroller.draggable = true; if (place) { if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper); } // Current rendered range (may be bigger than the view window). d.viewFrom = d.viewTo = doc.first; d.reportedViewFrom = d.reportedViewTo = doc.first; // Information about the rendered lines. d.view = []; d.renderedView = null; // Holds info about a single rendered line when it was rendered // for measurement, while not in view. d.externalMeasured = null; // Empty space (in pixels) above the view d.viewOffset = 0; d.lastWrapHeight = d.lastWrapWidth = 0; d.updateLineNumbers = null; d.nativeBarWidth = d.barHeight = d.barWidth = 0; d.scrollbarsClipped = false; // Used to only resize the line number gutter when necessary (when // the amount of lines crosses a boundary that makes its width change) d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null; // Set to true when a non-horizontal-scrolling line widget is // added. As an optimization, line widget aligning is skipped when // this is false. d.alignWidgets = false; d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null; // Tracks the maximum line length so that the horizontal scrollbar // can be kept static when scrolling. d.maxLine = null; d.maxLineLength = 0; d.maxLineChanged = false; // Used for measuring wheel scrolling granularity d.wheelDX = d.wheelDY = d.wheelStartX = d.wheelStartY = null; // True when shift is held down. d.shift = false; // Used to track whether anything happened since the context menu // was opened. d.selForContextMenu = null; d.activeTouch = null; input.init(d); } // 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 = ""; cm.display.sizerWidth = null; } 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 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"; } // 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 d = cm.display, gutterW = d.gutters.offsetWidth; var docH = Math.round(cm.doc.height + paddingVert(cm.display)); return { clientHeight: d.scroller.clientHeight, viewHeight: d.wrapper.clientHeight, scrollWidth: d.scroller.scrollWidth, clientWidth: d.scroller.clientWidth, viewWidth: d.wrapper.clientWidth, barLeft: cm.options.fixedGutter ? gutterW : 0, docHeight: docH, scrollHeight: docH + scrollGap(cm) + d.barHeight, nativeBarWidth: d.nativeBarWidth, gutterWidth: gutterW }; } function NativeScrollbars(place, scroll, cm) { this.cm = cm; var vert = this.vert = elt("div", [elt("div", null, null, "min-width: 1px")], "CodeMirror-vscrollbar"); var horiz = this.horiz = elt("div", [elt("div", null, null, "height: 100%; min-height: 1px")], "CodeMirror-hscrollbar"); place(vert); place(horiz); on(vert, "scroll", function() { if (vert.clientHeight) scroll(vert.scrollTop, "vertical"); }); on(horiz, "scroll", function() { if (horiz.clientWidth) scroll(horiz.scrollLeft, "horizontal"); }); this.checkedZeroWidth = false; // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8). if (ie && ie_version < 8) this.horiz.style.minHeight = this.vert.style.minWidth = "18px"; } NativeScrollbars.prototype = copyObj({ update: function(measure) { var needsH = measure.scrollWidth > measure.clientWidth + 1; var needsV = measure.scrollHeight > measure.clientHeight + 1; var sWidth = measure.nativeBarWidth; if (needsV) { this.vert.style.display = "block"; this.vert.style.bottom = needsH ? sWidth + "px" : "0"; var totalHeight = measure.viewHeight - (needsH ? sWidth : 0); // A bug in IE8 can cause this value to be negative, so guard it. this.vert.firstChild.style.height = Math.max(0, measure.scrollHeight - measure.clientHeight + totalHeight) + "px"; } else { this.vert.style.display = ""; this.vert.firstChild.style.height = "0"; } if (needsH) { this.horiz.style.display = "block"; this.horiz.style.right = needsV ? sWidth + "px" : "0"; this.horiz.style.left = measure.barLeft + "px"; var totalWidth = measure.viewWidth - measure.barLeft - (needsV ? sWidth : 0); this.horiz.firstChild.style.width = (measure.scrollWidth - measure.clientWidth + totalWidth) + "px"; } else { this.horiz.style.display = ""; this.horiz.firstChild.style.width = "0"; } if (!this.checkedZeroWidth && measure.clientHeight > 0) { if (sWidth == 0) this.zeroWidthHack(); this.checkedZeroWidth = true; } return {right: needsV ? sWidth : 0, bottom: needsH ? sWidth : 0}; }, setScrollLeft: function(pos) { if (this.horiz.scrollLeft != pos) this.horiz.scrollLeft = pos; if (this.disableHoriz) this.enableZeroWidthBar(this.horiz, this.disableHoriz); }, setScrollTop: function(pos) { if (this.vert.scrollTop != pos) this.vert.scrollTop = pos; if (this.disableVert) this.enableZeroWidthBar(this.vert, this.disableVert); }, zeroWidthHack: function() { var w = mac && !mac_geMountainLion ? "12px" : "18px"; this.horiz.style.height = this.vert.style.width = w; this.horiz.style.pointerEvents = this.vert.style.pointerEvents = "none"; this.disableHoriz = new Delayed; this.disableVert = new Delayed; }, enableZeroWidthBar: function(bar, delay) { bar.style.pointerEvents = "auto"; function maybeDisable() { // To find out whether the scrollbar is still visible, we // check whether the element under the pixel in the bottom // left corner of the scrollbar box is the scrollbar box // itself (when the bar is still visible) or its filler child // (when the bar is hidden). If it is still visible, we keep // it enabled, if it's hidden, we disable pointer events. var box = bar.getBoundingClientRect(); var elt = document.elementFromPoint(box.left + 1, box.bottom - 1); if (elt != bar) bar.style.pointerEvents = "none"; else delay.set(1000, maybeDisable); } delay.set(1000, maybeDisable); }, clear: function() { var parent = this.horiz.parentNode; parent.removeChild(this.horiz); parent.removeChild(this.vert); } }, NativeScrollbars.prototype); function NullScrollbars() {} NullScrollbars.prototype = copyObj({ update: function() { return {bottom: 0, right: 0}; }, setScrollLeft: function() {}, setScrollTop: function() {}, clear: function() {} }, NullScrollbars.prototype); CodeMirror.scrollbarModel = {"native": NativeScrollbars, "null": NullScrollbars}; function initScrollbars(cm) { if (cm.display.scrollbars) { cm.display.scrollbars.clear(); if (cm.display.scrollbars.addClass) rmClass(cm.display.wrapper, cm.display.scrollbars.addClass); } cm.display.scrollbars = new CodeMirror.scrollbarModel[cm.options.scrollbarStyle](function(node) { cm.display.wrapper.insertBefore(node, cm.display.scrollbarFiller); // Prevent clicks in the scrollbars from killing focus on(node, "mousedown", function() { if (cm.state.focused) setTimeout(function() { cm.display.input.focus(); }, 0); }); node.setAttribute("cm-not-content", "true"); }, function(pos, axis) { if (axis == "horizontal") setScrollLeft(cm, pos); else setScrollTop(cm, pos); }, cm); if (cm.display.scrollbars.addClass) addClass(cm.display.wrapper, cm.display.scrollbars.addClass); } function updateScrollbars(cm, measure) { if (!measure) measure = measureForScrollbars(cm); var startWidth = cm.display.barWidth, startHeight = cm.display.barHeight; updateScrollbarsInner(cm, measure); for (var i = 0; i < 4 && startWidth != cm.display.barWidth || startHeight != cm.display.barHeight; i++) { if (startWidth != cm.display.barWidth && cm.options.lineWrapping) updateHeightsInViewport(cm); updateScrollbarsInner(cm, measureForScrollbars(cm)); startWidth = cm.display.barWidth; startHeight = cm.display.barHeight; } } // Re-synchronize the fake scrollbars with the actual size of the // content. function updateScrollbarsInner(cm, measure) { var d = cm.display; var sizes = d.scrollbars.update(measure); d.sizer.style.paddingRight = (d.barWidth = sizes.right) + "px"; d.sizer.style.paddingBottom = (d.barHeight = sizes.bottom) + "px"; d.heightForcer.style.borderBottom = sizes.bottom + "px solid transparent" if (sizes.right && sizes.bottom) { d.scrollbarFiller.style.display = "block"; d.scrollbarFiller.style.height = sizes.bottom + "px"; d.scrollbarFiller.style.width = sizes.right + "px"; } else d.scrollbarFiller.style.display = ""; if (sizes.bottom && cm.options.coverGutterNextToScrollbar && cm.options.fixedGutter) { d.gutterFiller.style.display = "block"; d.gutterFiller.style.height = sizes.bottom + "px"; d.gutterFiller.style.width = measure.gutterWidth + "px"; } else d.gutterFiller.style.display = ""; } // Compute the lines that are visible in a given viewport (defaults // the the current scroll position). viewport may contain top, // height, and ensure (see op.scrollToPos) properties. function visibleLines(display, doc, viewport) { var top = viewport && viewport.top != null ? Math.max(0, viewport.top) : display.scroller.scrollTop; top = Math.floor(top - paddingTop(display)); var bottom = viewport && viewport.bottom != null ? viewport.bottom : top + display.wrapper.clientHeight; var from = lineAtHeight(doc, top), to = lineAtHeight(doc, bottom); // Ensure is a {from: {line, ch}, to: {line, ch}} object, and // forces those lines into the viewport (if possible). if (viewport && viewport.ensure) { var ensureFrom = viewport.ensure.from.line, ensureTo = viewport.ensure.to.line; if (ensureFrom < from) { from = ensureFrom; to = lineAtHeight(doc, heightAtLine(getLine(doc, ensureFrom)) + display.wrapper.clientHeight); } else if (Math.min(ensureTo, doc.lastLine()) >= to) { from = lineAtHeight(doc, heightAtLine(getLine(doc, ensureTo)) - display.wrapper.clientHeight); to = ensureTo; } } return {from: from, to: Math.max(to, from + 1)}; } // 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) { if (view[i].gutter) view[i].gutter.style.left = left; if (view[i].gutterBackground) view[i].gutterBackground.style.left = left; } var align = view[i].alignable; if (align) for (var j = 0; j < align.length; j++) align[j].style.left = left; } if (cm.options.fixedGutter) display.gutters.style.left = (comp + gutterW) + "px"; } // Used to ensure that the line number gutter is still the right // size for the current document size. Returns true when an update // is needed. function maybeUpdateLineNumberWidth(cm) { if (!cm.options.lineNumbers) return false; var doc = cm.doc, last = lineNumberFor(cm.options, doc.first + doc.size - 1), display = cm.display; if (last.length != display.lineNumChars) { var test = display.measure.appendChild(elt("div", [elt("div", last)], "CodeMirror-linenumber CodeMirror-gutter-elt")); var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW; display.lineGutter.style.width = ""; display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding) + 1; display.lineNumWidth = display.lineNumInnerWidth + padding; display.lineNumChars = display.lineNumInnerWidth ? last.length : -1; display.lineGutter.style.width = display.lineNumWidth + "px"; updateGutterSpace(cm); 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 function DisplayUpdate(cm, viewport, force) { var display = cm.display; this.viewport = viewport; // Store some values that we'll need later (but don't want to force a relayout for) this.visible = visibleLines(display, cm.doc, viewport); this.editorIsHidden = !display.wrapper.offsetWidth; this.wrapperHeight = display.wrapper.clientHeight; this.wrapperWidth = display.wrapper.clientWidth; this.oldDisplayWidth = displayWidth(cm); this.force = force; this.dims = getDimensions(cm); this.events = []; } DisplayUpdate.prototype.signal = function(emitter, type) { if (hasHandler(emitter, type)) this.events.push(arguments); }; DisplayUpdate.prototype.finish = function() { for (var i = 0; i < this.events.length; i++) signal.apply(null, this.events[i]); }; function maybeClipScrollbars(cm) { var display = cm.display; if (!display.scrollbarsClipped && display.scroller.offsetWidth) { display.nativeBarWidth = display.scroller.offsetWidth - display.scroller.clientWidth; display.heightForcer.style.height = scrollGap(cm) + "px"; display.sizer.style.marginBottom = -display.nativeBarWidth + "px"; display.sizer.style.borderRightWidth = scrollGap(cm) + "px"; display.scrollbarsClipped = true; } } // Does the actual updating of the line display. Bails out // (returning false) when there is nothing to be done and forced is // false. function updateDisplayIfNeeded(cm, update) { var display = cm.display, doc = cm.doc; if (update.editorIsHidden) { resetView(cm); return false; } // Bail out if the visible area is already rendered and nothing changed. if (!update.force && update.visible.from >= display.viewFrom && update.visible.to <= display.viewTo && (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo) && display.renderedView == display.view && countDirtyView(cm) == 0) return false; if (maybeUpdateLineNumberWidth(cm)) { resetView(cm); update.dims = getDimensions(cm); } // Compute a suitable new viewport (from & to) var end = doc.first + doc.size; var from = Math.max(update.visible.from - cm.options.viewportMargin, doc.first); var to = Math.min(end, update.visible.to + cm.options.viewportMargin); if (display.viewFrom < from && from - display.viewFrom < 20) from = Math.max(doc.first, display.viewFrom); if (display.viewTo > to && display.viewTo - to < 20) to = Math.min(end, display.viewTo); if (sawCollapsedSpans) { from = visualLineNo(cm.doc, from); to = visualLineEndNo(cm.doc, to); } var different = from != display.viewFrom || to != display.viewTo || display.lastWrapHeight != update.wrapperHeight || display.lastWrapWidth != update.wrapperWidth; adjustView(cm, from, to); display.viewOffset = heightAtLine(getLine(cm.doc, display.viewFrom)); // Position the mover div to align with the current scroll position cm.display.mover.style.top = display.viewOffset + "px"; var toUpdate = countDirtyView(cm); if (!different && toUpdate == 0 && !update.force && display.renderedView == display.view && (display.updateLineNumbers == null || display.updateLineNumbers >= display.viewTo)) return false; // For big changes, we hide the enclosing element during the // update, since that speeds up the operations on most browsers. var focused = activeElt(); if (toUpdate > 4) display.lineDiv.style.display = "none"; patchDisplay(cm, display.updateLineNumbers, update.dims); if (toUpdate > 4) display.lineDiv.style.display = ""; display.renderedView = display.view; // There might have been a widget with a focused element that got // hidden or updated, if so re-focus it. if (focused && activeElt() != focused && focused.offsetHeight) focused.focus(); // Prevent selection and cursors from interfering with the scroll // width and height. removeChildren(display.cursorDiv); removeChildren(display.selectionDiv); display.gutters.style.height = display.sizer.style.minHeight = 0; if (different) { display.lastWrapHeight = update.wrapperHeight; display.lastWrapWidth = update.wrapperWidth; startWorker(cm, 400); } display.updateLineNumbers = null; return true; } function postUpdateDisplay(cm, update) { var viewport = update.viewport; for (var first = true;; first = false) { if (!first || !cm.options.lineWrapping || update.oldDisplayWidth == displayWidth(cm)) { // Clip forced viewport to actual scrollable area. if (viewport && viewport.top != null) viewport = {top: Math.min(cm.doc.height + paddingVert(cm.display) - displayHeight(cm), viewport.top)}; // Updated line heights might result in the drawn area not // actually covering the viewport. Keep looping until it does. update.visible = visibleLines(cm.display, cm.doc, viewport); if (update.visible.from >= cm.display.viewFrom && update.visible.to <= cm.display.viewTo) break; } if (!updateDisplayIfNeeded(cm, update)) break; updateHeightsInViewport(cm); var barMeasure = measureForScrollbars(cm); updateSelection(cm); updateScrollbars(cm, barMeasure); setDocumentHeight(cm, barMeasure); } update.signal(cm, "update", cm); if (cm.display.viewFrom != cm.display.reportedViewFrom || cm.display.viewTo != cm.display.reportedViewTo) { update.signal(cm, "viewportChange", cm, cm.display.viewFrom, cm.display.viewTo); cm.display.reportedViewFrom = cm.display.viewFrom; cm.display.reportedViewTo = cm.display.viewTo; } } function updateDisplaySimple(cm, viewport) { var update = new DisplayUpdate(cm, viewport); if (updateDisplayIfNeeded(cm, update)) { updateHeightsInViewport(cm); postUpdateDisplay(cm, update); var barMeasure = measureForScrollbars(cm); updateSelection(cm); updateScrollbars(cm, barMeasure); setDocumentHeight(cm, barMeasure); update.finish(); } } function setDocumentHeight(cm, measure) { cm.display.sizer.style.minHeight = measure.docHeight + "px"; cm.display.heightForcer.style.top = measure.docHeight + "px"; cm.display.gutters.style.height = (measure.docHeight + cm.display.barHeight + scrollGap(cm)) + "px"; } // 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 && ie_version < 8) { var bot = cur.node.offsetTop + cur.node.offsetHeight; height = bot - prevBottom; prevBottom = bot; } else { var box = cur.node.getBoundingClientRect(); height = box.bottom - box.top; } 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.parentNode.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 = {}; var gutterLeft = d.gutters.clientLeft; for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) { left[cm.options.gutters[i]] = n.offsetLeft + n.clientLeft + gutterLeft; width[cm.options.gutters[i]] = n.clientWidth; } 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 || lineView.node.parentNode != container) { // Not drawn yet var node = buildLineElement(cm, lineView, lineN, dims); container.insertBefore(node, cur); } else { // Already drawn while (cur != lineView.node) cur = rm(cur); var updateNumber = lineNumbers && updateNumbersFrom != null && updateNumbersFrom <= lineN && lineView.lineNumber; if (lineView.changes) { if (indexOf(lineView.changes, "gutter") > -1) updateNumber = false; updateLineForChanges(cm, lineView, lineN, dims); } if (updateNumber) { removeChildren(lineView.lineNumber); lineView.lineNumber.appendChild(document.createTextNode(lineNumberFor(cm.options, lineN))); } cur = lineView.node.nextSibling; } lineN += lineView.size; } while (cur) cur = rm(cur); } // 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(cm, lineView, dims); } lineView.changes = null; } // Lines with gutter elements, widgets or a background class need to // be wrapped, and have the extra elements added to the wrapper div function ensureLineWrapped(lineView) { if (lineView.node == lineView.text) { lineView.node = elt("div", null, null, "position: relative"); if (lineView.text.parentNode) lineView.text.parentNode.replaceChild(lineView.node, lineView.text); lineView.node.appendChild(lineView.text); if (ie && ie_version < 8) lineView.node.style.zIndex = 2; } return lineView.node; } function updateLineBackground(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; } if (lineView.gutterBackground) { lineView.node.removeChild(lineView.gutterBackground); lineView.gutterBackground = null; } if (lineView.line.gutterClass) { var wrap = ensureLineWrapped(lineView); lineView.gutterBackground = elt("div", null, "CodeMirror-gutter-background " + lineView.line.gutterClass, "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px; width: " + dims.gutterTotalWidth + "px"); wrap.insertBefore(lineView.gutterBackground, lineView.text); } var markers = lineView.line.gutterMarkers; if (cm.options.lineNumbers || markers) { var wrap = ensureLineWrapped(lineView); var gutterWrap = lineView.gutter = elt("div", null, "CodeMirror-gutter-wrapper", "left: " + (cm.options.fixedGutter ? dims.fixedPos : -dims.gutterTotalWidth) + "px"); cm.display.input.setUneditable(gutterWrap); wrap.insertBefore(gutterWrap, lineView.text); if (lineView.line.gutterClass) gutterWrap.className += " " + lineView.line.gutterClass; if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"])) lineView.lineNumber = gutterWrap.appendChild( elt("div", lineNumberFor(cm.options, lineN), "CodeMirror-linenumber CodeMirror-gutter-elt", "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: " + cm.display.lineNumInnerWidth + "px")); if (markers) for (var k = 0; k < cm.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(cm, 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(cm, lineView, dims); } // Build a line's DOM representation from scratch function buildLineElement(cm, lineView, lineN, dims) { var built = getLineContent(cm, lineView); lineView.text = lineView.node = built.pre; if (built.bgClass) lineView.bgClass = built.bgClass; if (built.textClass) lineView.textClass = built.textClass; updateLineClasses(lineView); updateLineGutter(cm, lineView, lineN, dims); insertLineWidgets(cm, lineView, dims); return lineView.node; } // A lineView may contain multiple logical lines (when merged by // collapsed spans). The widgets for all of them need to be drawn. function insertLineWidgets(cm, lineView, dims) { insertLineWidgetsFor(cm, lineView.line, lineView, dims, true); if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) insertLineWidgetsFor(cm, lineView.rest[i], lineView, dims, false); } function insertLineWidgetsFor(cm, line, lineView, dims, allowAbove) { if (!line.widgets) return; var wrap = ensureLineWrapped(lineView); for (var i = 0, ws = line.widgets; i < ws.length; ++i) { var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget"); if (!widget.handleMouseEvents) node.setAttribute("cm-ignore-events", "true"); positionLineWidget(widget, node, lineView, dims); cm.display.input.setUneditable(node); if (allowAbove && widget.above) wrap.insertBefore(node, lineView.gutter || lineView.text); else wrap.appendChild(node); signalLater(widget, "redraw"); } } function positionLineWidget(widget, node, lineView, dims) { if (widget.noHScroll) { (lineView.alignable || (lineView.alignable = [])).push(node); var width = dims.wrapperWidth; node.style.left = dims.fixedPos + "px"; if (!widget.coverGutter) { width -= dims.gutterTotalWidth; node.style.paddingLeft = dims.gutterTotalWidth + "px"; } node.style.width = width + "px"; } if (widget.coverGutter) { node.style.zIndex = 5; node.style.position = "relative"; if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px"; } } // 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; } // INPUT HANDLING function ensureFocus(cm) { if (!cm.state.focused) { cm.display.input.focus(); onFocus(cm); } } // This will be set to a {lineWise: bool, text: [string]} object, so // that, when pasting, we know what kind of selections the copied // text was made out of. var lastCopied = null; function applyTextInput(cm, inserted, deleted, sel, origin) { var doc = cm.doc; cm.display.shift = false; if (!sel) sel = doc.sel; var paste = cm.state.pasteIncoming || origin == "paste"; var textLines = doc.splitLines(inserted), multiPaste = null // When pasing N lines into N selections, insert one line per selection if (paste && sel.ranges.length > 1) { if (lastCopied && lastCopied.text.join("\n") == inserted) { if (sel.ranges.length % lastCopied.text.length == 0) { multiPaste = []; for (var i = 0; i < lastCopied.text.length; i++) multiPaste.push(doc.splitLines(lastCopied.text[i])); } } else if (textLines.length == sel.ranges.length) { multiPaste = map(textLines, function(l) { return [l]; }); } } // Normal behavior is to insert the new text into every selection for (var i = sel.ranges.length - 1; i >= 0; i--) { var range = sel.ranges[i]; var from = range.from(), to = range.to(); if (range.empty()) { if (deleted && deleted > 0) // Handle deletion from = Pos(from.line, from.ch - deleted); else if (cm.state.overwrite && !paste) // Handle overwrite to = Pos(to.line, Math.min(getLine(doc, to.line).text.length, to.ch + lst(textLines).length)); else if (lastCopied && lastCopied.lineWise && lastCopied.text.join("\n") == inserted) from = to = Pos(from.line, 0) } var updateInput = cm.curOp.updateInput; var changeEvent = {from: from, to: to, text: multiPaste ? multiPaste[i % multiPaste.length] : textLines, origin: origin || (paste ? "paste" : cm.state.cutIncoming ? "cut" : "+input")}; makeChange(cm.doc, changeEvent); signalLater(cm, "inputRead", cm, changeEvent); } if (inserted && !paste) triggerElectric(cm, inserted); ensureCursorVisible(cm); cm.curOp.updateInput = updateInput; cm.curOp.typing = true; cm.state.pasteIncoming = cm.state.cutIncoming = false; } function handlePaste(e, cm) { var pasted = e.clipboardData && e.clipboardData.getData("Text"); if (pasted) { e.preventDefault(); if (!cm.isReadOnly() && !cm.options.disableInput) runInOp(cm, function() { applyTextInput(cm, pasted, 0, null, "paste"); }); return true; } } function triggerElectric(cm, inserted) { // When an 'electric' character is inserted, immediately trigger a reindent if (!cm.options.electricChars || !cm.options.smartIndent) return; var sel = cm.doc.sel; for (var i = sel.ranges.length - 1; i >= 0; i--) { var range = sel.ranges[i]; if (range.head.ch > 100 || (i && sel.ranges[i - 1].head.line == range.head.line)) continue; var mode = cm.getModeAt(range.head); var indented = false; if (mode.electricChars) { for (var j = 0; j < mode.electricChars.length; j++) if (inserted.indexOf(mode.electricChars.charAt(j)) > -1) { indented = indentLine(cm, range.head.line, "smart"); break; } } else if (mode.electricInput) { if (mode.electricInput.test(getLine(cm.doc, range.head.line).text.slice(0, range.head.ch))) indented = indentLine(cm, range.head.line, "smart"); } if (indented) signalLater(cm, "electricInput", cm, range.head.line); } } function copyableRanges(cm) { var text = [], ranges = []; for (var i = 0; i < cm.doc.sel.ranges.length; i++) { var line = cm.doc.sel.ranges[i].head.line; var lineRange = {anchor: Pos(line, 0), head: Pos(line + 1, 0)}; ranges.push(lineRange); text.push(cm.getRange(lineRange.anchor, lineRange.head)); } return {text: text, ranges: ranges}; } function disableBrowserMagic(field, spellcheck) { field.setAttribute("autocorrect", "off"); field.setAttribute("autocapitalize", "off"); field.setAttribute("spellcheck", !!spellcheck); } // TEXTAREA INPUT STYLE function TextareaInput(cm) { this.cm = cm; // See input.poll and input.reset this.prevInput = ""; // Flag that indicates whether we expect input to appear real soon // now (after some event like 'keypress' or 'input') and are // polling intensively. this.pollingFast = false; // Self-resetting timeout for the poller this.polling = new Delayed(); // Tracks when input.reset has punted to just putting a short // string into the textarea instead of the full selection. this.inaccurateSelection = false; // Used to work around IE issue with selection being forgotten when focus moves away from textarea this.hasSelection = false; this.composing = null; }; function hiddenTextarea() { var te = elt("textarea", null, null, "position: absolute; bottom: -1em; padding: 0; width: 1px; height: 1em; outline: none"); var div = elt("div", [te], null, "overflow: hidden; position: relative; width: 3px; height: 0px;"); // The textarea is kept positioned near the cursor to prevent the // fact that it'll be scrolled into view on input from scrolling // our fake cursor out of view. On webkit, when wrap=off, paste is // very slow. So make the area wide instead. if (webkit) te.style.width = "1000px"; else te.setAttribute("wrap", "off"); // If border: 0; -- iOS fails to open keyboard (issue #1287) if (ios) te.style.border = "1px solid black"; disableBrowserMagic(te); return div; } TextareaInput.prototype = copyObj({ init: function(display) { var input = this, cm = this.cm; // Wraps and hides input textarea var div = this.wrapper = hiddenTextarea(); // The semihidden textarea that is focused when the editor is // focused, and receives input. var te = this.textarea = div.firstChild; display.wrapper.insertBefore(div, display.wrapper.firstChild); // Needed to hide big blue blinking cursor on Mobile Safari (doesn't seem to work in iOS 8 anymore) if (ios) te.style.width = "0px"; on(te, "input", function() { if (ie && ie_version >= 9 && input.hasSelection) input.hasSelection = null; input.poll(); }); on(te, "paste", function(e) { if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return cm.state.pasteIncoming = true; input.fastPoll(); }); function prepareCopyCut(e) { if (signalDOMEvent(cm, e)) return if (cm.somethingSelected()) { lastCopied = {lineWise: false, text: cm.getSelections()}; if (input.inaccurateSelection) { input.prevInput = ""; input.inaccurateSelection = false; te.value = lastCopied.text.join("\n"); selectInput(te); } } else if (!cm.options.lineWiseCopyCut) { return; } else { var ranges = copyableRanges(cm); lastCopied = {lineWise: true, text: ranges.text}; if (e.type == "cut") { cm.setSelections(ranges.ranges, null, sel_dontScroll); } else { input.prevInput = ""; te.value = ranges.text.join("\n"); selectInput(te); } } if (e.type == "cut") cm.state.cutIncoming = true; } on(te, "cut", prepareCopyCut); on(te, "copy", prepareCopyCut); on(display.scroller, "paste", function(e) { if (eventInWidget(display, e) || signalDOMEvent(cm, e)) return; cm.state.pasteIncoming = true; input.focus(); }); // Prevent normal selection in the editor (we handle our own) on(display.lineSpace, "selectstart", function(e) { if (!eventInWidget(display, e)) e_preventDefault(e); }); on(te, "compositionstart", function() { var start = cm.getCursor("from"); if (input.composing) input.composing.range.clear() input.composing = { start: start, range: cm.markText(start, cm.getCursor("to"), {className: "CodeMirror-composing"}) }; }); on(te, "compositionend", function() { if (input.composing) { input.poll(); input.composing.range.clear(); input.composing = null; } }); }, prepareSelection: function() { // Redraw the selection and/or cursor var cm = this.cm, display = cm.display, doc = cm.doc; var result = prepareSelection(cm); // Move the hidden textarea near the cursor to prevent scrolling artifacts if (cm.options.moveInputWithCursor) { var headPos = cursorCoords(cm, doc.sel.primary().head, "div"); var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect(); result.teTop = Math.max(0, Math.min(display.wrapper.clientHeight - 10, headPos.top + lineOff.top - wrapOff.top)); result.teLeft = Math.max(0, Math.min(display.wrapper.clientWidth - 10, headPos.left + lineOff.left - wrapOff.left)); } return result; }, showSelection: function(drawn) { var cm = this.cm, display = cm.display; removeChildrenAndAdd(display.cursorDiv, drawn.cursors); removeChildrenAndAdd(display.selectionDiv, drawn.selection); if (drawn.teTop != null) { this.wrapper.style.top = drawn.teTop + "px"; this.wrapper.style.left = drawn.teLeft + "px"; } }, // Reset the input to correspond to the selection (or to be empty, // when not typing and nothing is selected) reset: function(typing) { if (this.contextMenuPending) return; var minimal, selected, cm = this.cm, doc = cm.doc; if (cm.somethingSelected()) { this.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(); this.textarea.value = content; if (cm.state.focused) selectInput(this.textarea); if (ie && ie_version >= 9) this.hasSelection = content; } else if (!typing) { this.prevInput = this.textarea.value = ""; if (ie && ie_version >= 9) this.hasSelection = null; } this.inaccurateSelection = minimal; }, getField: function() { return this.textarea; }, supportsTouch: function() { return false; }, focus: function() { if (this.cm.options.readOnly != "nocursor" && (!mobile || activeElt() != this.textarea)) { try { this.textarea.focus(); } catch (e) {} // IE8 will throw if the textarea is display: none or not in DOM } }, blur: function() { this.textarea.blur(); }, resetPosition: function() { this.wrapper.style.top = this.wrapper.style.left = 0; }, receivedFocus: function() { this.slowPoll(); }, // Poll for input changes, using the normal rate of polling. This // runs as long as the editor is focused. slowPoll: function() { var input = this; if (input.pollingFast) return; input.polling.set(this.cm.options.pollInterval, function() { input.poll(); if (input.cm.state.focused) input.slowPoll(); }); }, // When an event has just come in that is likely to add or change // something in the input textarea, we poll faster, to ensure that // the change appears on the screen quickly. fastPoll: function() { var missed = false, input = this; input.pollingFast = true; function p() { var changed = input.poll(); if (!changed && !missed) {missed = true; input.polling.set(60, p);} else {input.pollingFast = false; input.slowPoll();} } input.polling.set(20, p); }, // Read input from the textarea, and update the document to match. // When something is selected, it is present in the textarea, and // selected (unless it is huge, in which case a placeholder is // used). When nothing is selected, the cursor sits after previously // seen text (can be empty), which is stored in prevInput (we must // not reset the textarea when typing, because that breaks IME). poll: function() { var cm = this.cm, input = this.textarea, prevInput = this.prevInput; // Since this is called a *lot*, try to bail out as cheaply as // possible when it is clear that nothing happened. hasSelection // will be the case when there is a lot of text in the textarea, // in which case reading its value would be expensive. if (this.contextMenuPending || !cm.state.focused || (hasSelection(input) && !prevInput && !this.composing) || cm.isReadOnly() || cm.options.disableInput || cm.state.keySeq) return false; var text = input.value; // If nothing changed, bail. if (text == prevInput && !cm.somethingSelected()) return false; // Work around nonsensical selection resetting in IE9/10, and // inexplicable appearance of private area unicode characters on // some key combos in Mac (#2689). if (ie && ie_version >= 9 && this.hasSelection === text || mac && /[\uf700-\uf7ff]/.test(text)) { cm.display.input.reset(); return false; } if (cm.doc.sel == cm.display.selForContextMenu) { var first = text.charCodeAt(0); if (first == 0x200b && !prevInput) prevInput = "\u200b"; if (first == 0x21da) { this.reset(); return this.cm.execCommand("undo"); } } // Find the part of the input that is actually new var same = 0, l = Math.min(prevInput.length, text.length); while (same < l && prevInput.charCodeAt(same) == text.charCodeAt(same)) ++same; var self = this; runInOp(cm, function() { applyTextInput(cm, text.slice(same), prevInput.length - same, null, self.composing ? "*compose" : null); // Don't leave long text in the textarea, since it makes further polling slow if (text.length > 1000 || text.indexOf("\n") > -1) input.value = self.prevInput = ""; else self.prevInput = text; if (self.composing) { self.composing.range.clear(); self.composing.range = cm.markText(self.composing.start, cm.getCursor("to"), {className: "CodeMirror-composing"}); } }); return true; }, ensurePolled: function() { if (this.pollingFast && this.poll()) this.pollingFast = false; }, onKeyPress: function() { if (ie && ie_version >= 9) this.hasSelection = null; this.fastPoll(); }, onContextMenu: function(e) { var input = this, cm = input.cm, display = cm.display, te = input.textarea; var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop; if (!pos || presto) return; // Opera is difficult. // Reset the current text selection only if the click is done outside of the selection // and 'resetSelectionOnContextMenu' option is true. var reset = cm.options.resetSelectionOnContextMenu; if (reset && cm.doc.sel.contains(pos) == -1) operation(cm, setSelection)(cm.doc, simpleSelection(pos), sel_dontScroll); var oldCSS = te.style.cssText, oldWrapperCSS = input.wrapper.style.cssText; input.wrapper.style.cssText = "position: absolute" var wrapperBox = input.wrapper.getBoundingClientRect() te.style.cssText = "position: absolute; width: 30px; height: 30px; top: " + (e.clientY - wrapperBox.top - 5) + "px; left: " + (e.clientX - wrapperBox.left - 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);"; if (webkit) var oldScrollY = window.scrollY; // Work around Chrome issue (#2712) display.input.focus(); if (webkit) window.scrollTo(null, oldScrollY); display.input.reset(); // Adds "Select all" to context menu in FF if (!cm.somethingSelected()) te.value = input.prevInput = " "; input.contextMenuPending = true; display.selForContextMenu = cm.doc.sel; clearTimeout(display.detectingSelectAll); // Select-all will be greyed out if there's nothing to select, so // this adds a zero-width space so that we can later check whether // it got selected. function prepareSelectAllHack() { if (te.selectionStart != null) { var selected = cm.somethingSelected(); var extval = "\u200b" + (selected ? te.value : ""); te.value = "\u21da"; // Used to catch context-menu undo te.value = extval; input.prevInput = selected ? "" : "\u200b"; te.selectionStart = 1; te.selectionEnd = extval.length; // Re-set this, in case some other handler touched the // selection in the meantime. display.selForContextMenu = cm.doc.sel; } } function rehide() { input.contextMenuPending = false; input.wrapper.style.cssText = oldWrapperCSS te.style.cssText = oldCSS; if (ie && ie_version < 9) display.scrollbars.setScrollTop(display.scroller.scrollTop = scrollPos); // Try to detect the user choosing select-all if (te.selectionStart != null) { if (!ie || (ie && ie_version < 9)) prepareSelectAllHack(); var i = 0, poll = function() { if (display.selForContextMenu == cm.doc.sel && te.selectionStart == 0 && te.selectionEnd > 0 && input.prevInput == "\u200b") operation(cm, commands.selectAll)(cm); else if (i++ < 10) display.detectingSelectAll = setTimeout(poll, 500); else display.input.reset(); }; display.detectingSelectAll = setTimeout(poll, 200); } } if (ie && ie_version >= 9) prepareSelectAllHack(); if (captureRightClick) { e_stop(e); var mouseup = function() { off(window, "mouseup", mouseup); setTimeout(rehide, 20); }; on(window, "mouseup", mouseup); } else { setTimeout(rehide, 50); } }, readOnlyChanged: function(val) { if (!val) this.reset(); }, setUneditable: nothing, needsContentAttribute: false }, TextareaInput.prototype); // CONTENTEDITABLE INPUT STYLE function ContentEditableInput(cm) { this.cm = cm; this.lastAnchorNode = this.lastAnchorOffset = this.lastFocusNode = this.lastFocusOffset = null; this.polling = new Delayed(); this.gracePeriod = false; } ContentEditableInput.prototype = copyObj({ init: function(display) { var input = this, cm = input.cm; var div = input.div = display.lineDiv; disableBrowserMagic(div, cm.options.spellcheck); on(div, "paste", function(e) { if (signalDOMEvent(cm, e) || handlePaste(e, cm)) return // IE doesn't fire input events, so we schedule a read for the pasted content in this way if (ie_version <= 11) setTimeout(operation(cm, function() { if (!input.pollContent()) regChange(cm); }), 20) }) on(div, "compositionstart", function(e) { var data = e.data; input.composing = {sel: cm.doc.sel, data: data, startData: data}; if (!data) return; var prim = cm.doc.sel.primary(); var line = cm.getLine(prim.head.line); var found = line.indexOf(data, Math.max(0, prim.head.ch - data.length)); if (found > -1 && found <= prim.head.ch) input.composing.sel = simpleSelection(Pos(prim.head.line, found), Pos(prim.head.line, found + data.length)); }); on(div, "compositionupdate", function(e) { input.composing.data = e.data; }); on(div, "compositionend", function(e) { var ours = input.composing; if (!ours) return; if (e.data != ours.startData && !/\u200b/.test(e.data)) ours.data = e.data; // Need a small delay to prevent other code (input event, // selection polling) from doing damage when fired right after // compositionend. setTimeout(function() { if (!ours.handled) input.applyComposition(ours); if (input.composing == ours) input.composing = null; }, 50); }); on(div, "touchstart", function() { input.forceCompositionEnd(); }); on(div, "input", function() { if (input.composing) return; if (cm.isReadOnly() || !input.pollContent()) runInOp(input.cm, function() {regChange(cm);}); }); function onCopyCut(e) { if (signalDOMEvent(cm, e)) return if (cm.somethingSelected()) { lastCopied = {lineWise: false, text: cm.getSelections()}; if (e.type == "cut") cm.replaceSelection("", null, "cut"); } else if (!cm.options.lineWiseCopyCut) { return; } else { var ranges = copyableRanges(cm); lastCopied = {lineWise: true, text: ranges.text}; if (e.type == "cut") { cm.operation(function() { cm.setSelections(ranges.ranges, 0, sel_dontScroll); cm.replaceSelection("", null, "cut"); }); } } if (e.clipboardData) { e.clipboardData.clearData(); var content = lastCopied.text.join("\n") // iOS exposes the clipboard API, but seems to discard content inserted into it e.clipboardData.setData("Text", content); if (e.clipboardData.getData("Text") == content) { e.preventDefault(); return } } // Old-fashioned briefly-focus-a-textarea hack var kludge = hiddenTextarea(), te = kludge.firstChild; cm.display.lineSpace.insertBefore(kludge, cm.display.lineSpace.firstChild); te.value = lastCopied.text.join("\n"); var hadFocus = document.activeElement; selectInput(te); setTimeout(function() { cm.display.lineSpace.removeChild(kludge); hadFocus.focus(); if (hadFocus == div) input.showPrimarySelection() }, 50); } on(div, "copy", onCopyCut); on(div, "cut", onCopyCut); }, prepareSelection: function() { var result = prepareSelection(this.cm, false); result.focus = this.cm.state.focused; return result; }, showSelection: function(info, takeFocus) { if (!info || !this.cm.display.view.length) return; if (info.focus || takeFocus) this.showPrimarySelection(); this.showMultipleSelections(info); }, showPrimarySelection: function() { var sel = window.getSelection(), prim = this.cm.doc.sel.primary(); var curAnchor = domToPos(this.cm, sel.anchorNode, sel.anchorOffset); var curFocus = domToPos(this.cm, sel.focusNode, sel.focusOffset); if (curAnchor && !curAnchor.bad && curFocus && !curFocus.bad && cmp(minPos(curAnchor, curFocus), prim.from()) == 0 && cmp(maxPos(curAnchor, curFocus), prim.to()) == 0) return; var start = posToDOM(this.cm, prim.from()); var end = posToDOM(this.cm, prim.to()); if (!start && !end) return; var view = this.cm.display.view; var old = sel.rangeCount && sel.getRangeAt(0); if (!start) { start = {node: view[0].measure.map[2], offset: 0}; } else if (!end) { // FIXME dangerously hacky var measure = view[view.length - 1].measure; var map = measure.maps ? measure.maps[measure.maps.length - 1] : measure.map; end = {node: map[map.length - 1], offset: map[map.length - 2] - map[map.length - 3]}; } try { var rng = range(start.node, start.offset, end.offset, end.node); } catch(e) {} // Our model of the DOM might be outdated, in which case the range we try to set can be impossible if (rng) { if (!gecko && this.cm.state.focused) { sel.collapse(start.node, start.offset); if (!rng.collapsed) sel.addRange(rng); } else { sel.removeAllRanges(); sel.addRange(rng); } if (old && sel.anchorNode == null) sel.addRange(old); else if (gecko) this.startGracePeriod(); } this.rememberSelection(); }, startGracePeriod: function() { var input = this; clearTimeout(this.gracePeriod); this.gracePeriod = setTimeout(function() { input.gracePeriod = false; if (input.selectionChanged()) input.cm.operation(function() { input.cm.curOp.selectionChanged = true; }); }, 20); }, showMultipleSelections: function(info) { removeChildrenAndAdd(this.cm.display.cursorDiv, info.cursors); removeChildrenAndAdd(this.cm.display.selectionDiv, info.selection); }, rememberSelection: function() { var sel = window.getSelection(); this.lastAnchorNode = sel.anchorNode; this.lastAnchorOffset = sel.anchorOffset; this.lastFocusNode = sel.focusNode; this.lastFocusOffset = sel.focusOffset; }, selectionInEditor: function() { var sel = window.getSelection(); if (!sel.rangeCount) return false; var node = sel.getRangeAt(0).commonAncestorContainer; return contains(this.div, node); }, focus: function() { if (this.cm.options.readOnly != "nocursor") this.div.focus(); }, blur: function() { this.div.blur(); }, getField: function() { return this.div; }, supportsTouch: function() { return true; }, receivedFocus: function() { var input = this; if (this.selectionInEditor()) this.pollSelection(); else runInOp(this.cm, function() { input.cm.curOp.selectionChanged = true; }); function poll() { if (input.cm.state.focused) { input.pollSelection(); input.polling.set(input.cm.options.pollInterval, poll); } } this.polling.set(this.cm.options.pollInterval, poll); }, selectionChanged: function() { var sel = window.getSelection(); return sel.anchorNode != this.lastAnchorNode || sel.anchorOffset != this.lastAnchorOffset || sel.focusNode != this.lastFocusNode || sel.focusOffset != this.lastFocusOffset; }, pollSelection: function() { if (!this.composing && !this.gracePeriod && this.selectionChanged()) { var sel = window.getSelection(), cm = this.cm; this.rememberSelection(); var anchor = domToPos(cm, sel.anchorNode, sel.anchorOffset); var head = domToPos(cm, sel.focusNode, sel.focusOffset); if (anchor && head) runInOp(cm, function() { setSelection(cm.doc, simpleSelection(anchor, head), sel_dontScroll); if (anchor.bad || head.bad) cm.curOp.selectionChanged = true; }); } }, pollContent: function() { var cm = this.cm, display = cm.display, sel = cm.doc.sel.primary(); var from = sel.from(), to = sel.to(); if (from.line < display.viewFrom || to.line > display.viewTo - 1) return false; var fromIndex; if (from.line == display.viewFrom || (fromIndex = findViewIndex(cm, from.line)) == 0) { var fromLine = lineNo(display.view[0].line); var fromNode = display.view[0].node; } else { var fromLine = lineNo(display.view[fromIndex].line); var fromNode = display.view[fromIndex - 1].node.nextSibling; } var toIndex = findViewIndex(cm, to.line); if (toIndex == display.view.length - 1) { var toLine = display.viewTo - 1; var toNode = display.lineDiv.lastChild; } else { var toLine = lineNo(display.view[toIndex + 1].line) - 1; var toNode = display.view[toIndex + 1].node.previousSibling; } var newText = cm.doc.splitLines(domTextBetween(cm, fromNode, toNode, fromLine, toLine)); var oldText = getBetween(cm.doc, Pos(fromLine, 0), Pos(toLine, getLine(cm.doc, toLine).text.length)); while (newText.length > 1 && oldText.length > 1) { if (lst(newText) == lst(oldText)) { newText.pop(); oldText.pop(); toLine--; } else if (newText[0] == oldText[0]) { newText.shift(); oldText.shift(); fromLine++; } else break; } var cutFront = 0, cutEnd = 0; var newTop = newText[0], oldTop = oldText[0], maxCutFront = Math.min(newTop.length, oldTop.length); while (cutFront < maxCutFront && newTop.charCodeAt(cutFront) == oldTop.charCodeAt(cutFront)) ++cutFront; var newBot = lst(newText), oldBot = lst(oldText); var maxCutEnd = Math.min(newBot.length - (newText.length == 1 ? cutFront : 0), oldBot.length - (oldText.length == 1 ? cutFront : 0)); while (cutEnd < maxCutEnd && newBot.charCodeAt(newBot.length - cutEnd - 1) == oldBot.charCodeAt(oldBot.length - cutEnd - 1)) ++cutEnd; newText[newText.length - 1] = newBot.slice(0, newBot.length - cutEnd); newText[0] = newText[0].slice(cutFront); var chFrom = Pos(fromLine, cutFront); var chTo = Pos(toLine, oldText.length ? lst(oldText).length - cutEnd : 0); if (newText.length > 1 || newText[0] || cmp(chFrom, chTo)) { replaceRange(cm.doc, newText, chFrom, chTo, "+input"); return true; } }, ensurePolled: function() { this.forceCompositionEnd(); }, reset: function() { this.forceCompositionEnd(); }, forceCompositionEnd: function() { if (!this.composing || this.composing.handled) return; this.applyComposition(this.composing); this.composing.handled = true; this.div.blur(); this.div.focus(); }, applyComposition: function(composing) { if (this.cm.isReadOnly()) operation(this.cm, regChange)(this.cm) else if (composing.data && composing.data != composing.startData) operation(this.cm, applyTextInput)(this.cm, composing.data, 0, composing.sel); }, setUneditable: function(node) { node.contentEditable = "false" }, onKeyPress: function(e) { e.preventDefault(); if (!this.cm.isReadOnly()) operation(this.cm, applyTextInput)(this.cm, String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode), 0); }, readOnlyChanged: function(val) { this.div.contentEditable = String(val != "nocursor") }, onContextMenu: nothing, resetPosition: nothing, needsContentAttribute: true }, ContentEditableInput.prototype); function posToDOM(cm, pos) { var view = findViewForLine(cm, pos.line); if (!view || view.hidden) return null; var line = getLine(cm.doc, pos.line); var info = mapFromLineView(view, line, pos.line); var order = getOrder(line), side = "left"; if (order) { var partPos = getBidiPartAt(order, pos.ch); side = partPos % 2 ? "right" : "left"; } var result = nodeAndOffsetInLineMap(info.map, pos.ch, side); result.offset = result.collapse == "right" ? result.end : result.start; return result; } function badPos(pos, bad) { if (bad) pos.bad = true; return pos; } function domToPos(cm, node, offset) { var lineNode; if (node == cm.display.lineDiv) { lineNode = cm.display.lineDiv.childNodes[offset]; if (!lineNode) return badPos(cm.clipPos(Pos(cm.display.viewTo - 1)), true); node = null; offset = 0; } else { for (lineNode = node;; lineNode = lineNode.parentNode) { if (!lineNode || lineNode == cm.display.lineDiv) return null; if (lineNode.parentNode && lineNode.parentNode == cm.display.lineDiv) break; } } for (var i = 0; i < cm.display.view.length; i++) { var lineView = cm.display.view[i]; if (lineView.node == lineNode) return locateNodeInLineView(lineView, node, offset); } } function locateNodeInLineView(lineView, node, offset) { var wrapper = lineView.text.firstChild, bad = false; if (!node || !contains(wrapper, node)) return badPos(Pos(lineNo(lineView.line), 0), true); if (node == wrapper) { bad = true; node = wrapper.childNodes[offset]; offset = 0; if (!node) { var line = lineView.rest ? lst(lineView.rest) : lineView.line; return badPos(Pos(lineNo(line), line.text.length), bad); } } var textNode = node.nodeType == 3 ? node : null, topNode = node; if (!textNode && node.childNodes.length == 1 && node.firstChild.nodeType == 3) { textNode = node.firstChild; if (offset) offset = textNode.nodeValue.length; } while (topNode.parentNode != wrapper) topNode = topNode.parentNode; var measure = lineView.measure, maps = measure.maps; function find(textNode, topNode, offset) { for (var i = -1; i < (maps ? maps.length : 0); i++) { var map = i < 0 ? measure.map : maps[i]; for (var j = 0; j < map.length; j += 3) { var curNode = map[j + 2]; if (curNode == textNode || curNode == topNode) { var line = lineNo(i < 0 ? lineView.line : lineView.rest[i]); var ch = map[j] + offset; if (offset < 0 || curNode != textNode) ch = map[j + (offset ? 1 : 0)]; return Pos(line, ch); } } } } var found = find(textNode, topNode, offset); if (found) return badPos(found, bad); // FIXME this is all really shaky. might handle the few cases it needs to handle, but likely to cause problems for (var after = topNode.nextSibling, dist = textNode ? textNode.nodeValue.length - offset : 0; after; after = after.nextSibling) { found = find(after, after.firstChild, 0); if (found) return badPos(Pos(found.line, found.ch - dist), bad); else dist += after.textContent.length; } for (var before = topNode.previousSibling, dist = offset; before; before = before.previousSibling) { found = find(before, before.firstChild, -1); if (found) return badPos(Pos(found.line, found.ch + dist), bad); else dist += before.textContent.length; } } function domTextBetween(cm, from, to, fromLine, toLine) { var text = "", closing = false, lineSep = cm.doc.lineSeparator(); function recognizeMarker(id) { return function(marker) { return marker.id == id; }; } function walk(node) { if (node.nodeType == 1) { var cmText = node.getAttribute("cm-text"); if (cmText != null) { if (cmText == "") cmText = node.textContent.replace(/\u200b/g, ""); text += cmText; return; } var markerID = node.getAttribute("cm-marker"), range; if (markerID) { var found = cm.findMarks(Pos(fromLine, 0), Pos(toLine + 1, 0), recognizeMarker(+markerID)); if (found.length && (range = found[0].find())) text += getBetween(cm.doc, range.from, range.to).join(lineSep); return; } if (node.getAttribute("contenteditable") == "false") return; for (var i = 0; i < node.childNodes.length; i++) walk(node.childNodes[i]); if (/^(pre|div|p)$/i.test(node.nodeName)) closing = true; } else if (node.nodeType == 3) { var val = node.nodeValue; if (!val) return; if (closing) { text += lineSep; closing = false; } text += val; } } for (;;) { walk(from); if (from == to) break; from = from.nextSibling; } return text; } CodeMirror.inputStyles = {"textarea": TextareaInput, "contenteditable": ContentEditableInput}; // 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, options) { 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)); }, origin: options && options.origin }; signal(doc, "beforeSelectionChange", doc, obj); if (doc.cm) signal(doc.cm, "beforeSelectionChange", doc.cm, obj); if (obj.ranges != sel.ranges) return normalizeSelection(obj.ranges, obj.ranges.length - 1); else return sel; } function setSelectionReplaceHistory(doc, sel, options) { var done = doc.history.done, last = lst(done); if (last && last.ranges) { done[done.length - 1] = sel; setSelectionNoUndo(doc, sel, options); } else { setSelection(doc, sel, options); } } // Set a new selection. function setSelection(doc, sel, options) { setSelectionNoUndo(doc, sel, options); addSelectionToHistory(doc, doc.sel, doc.cm ? doc.cm.curOp.id : NaN, options); } function setSelectionNoUndo(doc, sel, options) { if (hasHandler(doc, "beforeSelectionChange") || doc.cm && hasHandler(doc.cm, "beforeSelectionChange")) sel = filterSelectionChange(doc, sel, options); var bias = options && options.bias || (cmp(sel.primary().head, doc.sel.primary().head) < 0 ? -1 : 1); setSelectionInner(doc, skipAtomicInSelection(doc, sel, bias, true)); if (!(options && options.scroll === false) && doc.cm) ensureCursorVisible(doc.cm); } function setSelectionInner(doc, sel) { if (sel.equals(doc.sel)) return; doc.sel = sel; if (doc.cm) { doc.cm.curOp.updateInput = 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 old = sel.ranges.length == doc.sel.ranges.length && doc.sel.ranges[i]; var newAnchor = skipAtomic(doc, range.anchor, old && old.anchor, bias, mayClear); var newHead = skipAtomic(doc, range.head, old && old.head, bias, mayClear); if (out || newAnchor != range.anchor || newHead != range.head) { if (!out) out = sel.ranges.slice(0, i); out[i] = new Range(newAnchor, newHead); } } return out ? normalizeSelection(out, sel.primIndex) : sel; } function skipAtomicInner(doc, pos, oldPos, dir, mayClear) { var line = getLine(doc, pos.line); if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) { var sp = line.markedSpans[i], m = sp.marker; if ((sp.from == null || (m.inclusiveLeft ? sp.from <= pos.ch : sp.from < pos.ch)) && (sp.to == null || (m.inclusiveRight ? sp.to >= pos.ch : sp.to > pos.ch))) { if (mayClear) { signal(m, "beforeCursorEnter"); if (m.explicitlyCleared) { if (!line.markedSpans) break; else {--i; continue;} } } if (!m.atomic) continue; if (oldPos) { var near = m.find(dir < 0 ? 1 : -1), diff; if (dir < 0 ? m.inclusiveRight : m.inclusiveLeft) near = movePos(doc, near, -dir, near && near.line == pos.line ? line : null); if (near && near.line == pos.line && (diff = cmp(near, oldPos)) && (dir < 0 ? diff < 0 : diff > 0)) return skipAtomicInner(doc, near, pos, dir, mayClear); } var far = m.find(dir < 0 ? -1 : 1); if (dir < 0 ? m.inclusiveLeft : m.inclusiveRight) far = movePos(doc, far, dir, far.line == pos.line ? line : null); return far ? skipAtomicInner(doc, far, pos, dir, mayClear) : null; } } return pos; } // Ensure a given position is not inside an atomic range. function skipAtomic(doc, pos, oldPos, bias, mayClear) { var dir = bias || 1; var found = skipAtomicInner(doc, pos, oldPos, dir, mayClear) || (!mayClear && skipAtomicInner(doc, pos, oldPos, dir, true)) || skipAtomicInner(doc, pos, oldPos, -dir, mayClear) || (!mayClear && skipAtomicInner(doc, pos, oldPos, -dir, true)); if (!found) { doc.cantEdit = true; return Pos(doc.first, 0); } return found; } function movePos(doc, pos, dir, line) { if (dir < 0 && pos.ch == 0) { if (pos.line > doc.first) return clipPos(doc, Pos(pos.line - 1)); else return null; } else if (dir > 0 && pos.ch == (line || getLine(doc, pos.line)).text.length) { if (pos.line < doc.first + doc.size - 1) return Pos(pos.line + 1, 0); else return null; } else { return new Pos(pos.line, pos.ch + dir); } } // SELECTION DRAWING function updateSelection(cm) { cm.display.input.showSelection(cm.display.input.prepareSelection()); } function prepareSelection(cm, primary) { var doc = cm.doc, result = {}; var curFragment = result.cursors = document.createDocumentFragment(); var selFragment = result.selection = document.createDocumentFragment(); for (var i = 0; i < doc.sel.ranges.length; i++) { if (primary === false && i == doc.sel.primIndex) continue; var range = doc.sel.ranges[i]; if (range.from().line >= cm.display.viewTo || range.to().line < cm.display.viewFrom) continue; var collapsed = range.empty(); if (collapsed || cm.options.showCursorWhenSelecting) drawSelectionCursor(cm, range.head, curFragment); if (!collapsed) drawSelectionRange(cm, range, selFragment); } return result; } // Draws a cursor for the given range function drawSelectionCursor(cm, head, output) { var pos = cursorCoords(cm, head, "div", null, null, !cm.options.singleCursorHeightPerLine); var cursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor")); cursor.style.left = pos.left + "px"; cursor.style.top = pos.top + "px"; cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px"; if (pos.other) { // Secondary cursor, shown when on a 'jump' in bi-directional text var otherCursor = output.appendChild(elt("div", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor")); otherCursor.style.display = ""; otherCursor.style.left = pos.other.left + "px"; otherCursor.style.top = pos.other.top + "px"; otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px"; } } // 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; var rightSide = Math.max(display.sizerWidth, displayWidth(cm) - display.sizer.offsetLeft) - 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); else if (cm.options.cursorBlinkRate < 0) display.cursorDiv.style.visibility = "hidden"; } // 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)); var changedLines = []; 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, tooLong = line.text.length > cm.options.maxHighlightLength; var highlighted = highlightLine(cm, line, tooLong ? copyState(doc.mode, state) : state, true); line.styles = highlighted.styles; var oldCls = line.styleClasses, newCls = highlighted.classes; if (newCls) line.styleClasses = newCls; else if (oldCls) line.styleClasses = null; var ischange = !oldStyles || oldStyles.length != line.styles.length || oldCls != newCls && (!oldCls || !newCls || oldCls.bgClass != newCls.bgClass || oldCls.textClass != newCls.textClass); for (var i = 0; !ischange && i < oldStyles.length; ++i) ischange = oldStyles[i] != line.styles[i]; if (ischange) changedLines.push(doc.frontier); line.stateAfter = tooLong ? state : copyState(doc.mode, state); } else { if (line.text.length <= cm.options.maxHighlightLength) 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; } }); if (changedLines.length) runInOp(cm, function() { for (var i = 0; i < changedLines.length; i++) regLineChange(cm, changedLines[i], "text"); }); } // 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; } function scrollGap(cm) { return scrollerGap - cm.display.nativeBarWidth; } function displayWidth(cm) { return cm.display.scroller.clientWidth - scrollGap(cm) - cm.display.barWidth; } function displayHeight(cm) { return cm.display.scroller.clientHeight - scrollGap(cm) - cm.display.barHeight; } // Ensure the lineView.wrapping.heights array is populated. This is // an array of bottom offsets for the lines that make up a drawn // line. When lineWrapping is on, there might be more than one // height. function ensureLineHeights(cm, lineView, rect) { var wrapping = cm.options.lineWrapping; var curWidth = wrapping && displayWidth(cm); if (!lineView.measure.heights || wrapping && lineView.measure.width != curWidth) { var heights = lineView.measure.heights = []; if (wrapping) { lineView.measure.width = curWidth; var rects = lineView.text.firstChild.getClientRects(); for (var i = 0; i < rects.length - 1; i++) { var cur = rects[i], next = rects[i + 1]; if (Math.abs(cur.bottom - next.bottom) > 2) heights.push((cur.bottom + next.top) / 2 - rect.top); } } heights.push(rect.bottom - rect.top); } } // Find a line map (mapping character offsets to text nodes) and a // measurement cache for the given line number. (A line view might // contain multiple lines when collapsed ranges are present.) function mapFromLineView(lineView, line, lineN) { if (lineView.line == line) return {map: lineView.measure.map, cache: lineView.measure.cache}; for (var i = 0; i < lineView.rest.length; i++) if (lineView.rest[i] == line) return {map: lineView.measure.maps[i], cache: lineView.measure.caches[i]}; for (var i = 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)); cm.curOp.forceUpdate = true; } if (!view) view = updateExternalMeasurement(cm, line); var info = mapFromLineView(view, line, lineN); return { line: line, view: view, rect: null, map: info.map, cache: info.cache, before: info.before, hasHeights: false }; } // Given a prepared measurement object, measures the position of an // actual character (or fetches it from the cache). function measureCharPrepared(cm, prepared, ch, bias, varHeight) { if (prepared.before) ch = -1; var key = ch + (bias || ""), found; if (prepared.cache.hasOwnProperty(key)) { found = prepared.cache[key]; } else { if (!prepared.rect) prepared.rect = prepared.view.text.getBoundingClientRect(); if (!prepared.hasHeights) { ensureLineHeights(cm, prepared.view, prepared.rect); prepared.hasHeights = true; } found = measureCharInner(cm, prepared, ch, bias); if (!found.bogus) prepared.cache[key] = found; } return {left: found.left, right: found.right, top: varHeight ? found.rtop : found.top, bottom: varHeight ? found.rbottom : found.bottom}; } var nullRect = {left: 0, right: 0, top: 0, bottom: 0}; function nodeAndOffsetInLineMap(map, ch, bias) { 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; } } return {node: node, start: start, end: end, collapse: collapse, coverStart: mStart, coverEnd: mEnd}; } function getUsefulRect(rects, bias) { var rect = nullRect if (bias == "left") for (var i = 0; i < rects.length; i++) { if ((rect = rects[i]).left != rect.right) break } else for (var i = rects.length - 1; i >= 0; i--) { if ((rect = rects[i]).left != rect.right) break } return rect } function measureCharInner(cm, prepared, ch, bias) { var place = nodeAndOffsetInLineMap(prepared.map, ch, bias); var node = place.node, start = place.start, end = place.end, collapse = place.collapse; var rect; if (node.nodeType == 3) { // If it is a text node, use a range to retrieve the coordinates. for (var i = 0; i < 4; i++) { // Retry a maximum of 4 times when nonsense rectangles are returned while (start && isExtendingChar(prepared.line.text.charAt(place.coverStart + start))) --start; while (place.coverStart + end < place.coverEnd && isExtendingChar(prepared.line.text.charAt(place.coverStart + end))) ++end; if (ie && ie_version < 9 && start == 0 && end == place.coverEnd - place.coverStart) rect = node.parentNode.getBoundingClientRect(); else rect = getUsefulRect(range(node, start, end).getClientRects(), bias) if (rect.left || rect.right || start == 0) break; end = start; start = start - 1; collapse = "right"; } if (ie && ie_version < 11) rect = maybeUpdateRectForZooming(cm.display.measure, rect); } else { // If it is a widget, simply get the box for the whole widget. if (start > 0) collapse = bias = "right"; var rects; if (cm.options.lineWrapping && (rects = node.getClientRects()).length > 1) rect = rects[bias == "right" ? rects.length - 1 : 0]; else rect = node.getBoundingClientRect(); } if (ie && ie_version < 9 && !start && (!rect || !rect.left && !rect.right)) { var rSpan = node.parentNode.getClientRects()[0]; if (rSpan) rect = {left: rSpan.left, right: rSpan.left + charWidth(cm.display), top: rSpan.top, bottom: rSpan.bottom}; else rect = nullRect; } var rtop = rect.top - prepared.rect.top, rbot = rect.bottom - prepared.rect.top; var mid = (rtop + rbot) / 2; var heights = prepared.view.measure.heights; for (var i = 0; i < heights.length - 1; i++) if (mid < heights[i]) break; var top = i ? heights[i - 1] : 0, bot = heights[i]; var result = {left: (collapse == "right" ? rect.right : rect.left) - prepared.rect.left, right: (collapse == "left" ? rect.left : rect.right) - prepared.rect.left, top: top, bottom: bot}; if (!rect.left && !rect.right) result.bogus = true; if (!cm.options.singleCursorHeightPerLine) { result.rtop = rtop; result.rbottom = rbot; } return result; } // Work around problem with bounding client rects on ranges being // returned incorrectly when zoomed on IE10 and below. function maybeUpdateRectForZooming(measure, rect) { if (!window.screen || screen.logicalXDPI == null || screen.logicalXDPI == screen.deviceXDPI || !hasBadZoomedRects(measure)) return rect; var scaleX = screen.logicalXDPI / screen.deviceXDPI; var scaleY = screen.logicalYDPI / screen.deviceYDPI; return {left: rect.left * scaleX, right: rect.right * scaleX, top: rect.top * scaleY, bottom: rect.bottom * scaleY}; } function clearLineMeasurementCacheFor(lineView) { if (lineView.measure) { lineView.measure.cache = {}; lineView.measure.heights = null; if (lineView.rest) for (var i = 0; i < lineView.rest.length; i++) lineView.measure.caches[i] = {}; } } function clearLineMeasurementCache(cm) { cm.display.externalMeasure = null; removeChildren(cm.display.lineMeasure); for (var i = 0; i < cm.display.view.length; i++) clearLineMeasurementCacheFor(cm.display.view[i]); } function clearCaches(cm) { clearLineMeasurementCache(cm); cm.display.cachedCharWidth = cm.display.cachedTextHeight = cm.display.cachedPaddingH = null; if (!cm.options.lineWrapping) cm.display.maxLineChanged = true; cm.display.lineNumChars = null; } function pageScrollX() { 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), "window", // 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, varHeight) { lineObj = lineObj || getLine(cm.doc, pos.line); if (!preparedMeasure) preparedMeasure = prepareMeasureForLine(cm, lineObj); function get(ch, right) { var m = measureCharPrepared(cm, preparedMeasure, ch, right ? "right" : "left", varHeight); if (right) m.left = m.right; else m.right = m.left; return intoCoordSystem(cm, lineObj, m, context); } 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 outside = ch == from ? fromOutside : toOutside var xDiff = x - (ch == from ? fromX : toX); // This is a kludge to handle the case where the coordinates // are after a line-wrapped line. We should replace it with a // more general handling of cursor positions around line // breaks. (Issue #4078) if (toOutside && !bidi && !/\s/.test(lineObj.text.charAt(ch)) && xDiff > 0 && ch < lineObj.text.length && preparedMeasure.view.measure.heights.length > 1) { var charSize = measureCharPrepared(cm, preparedMeasure, ch, "right"); if (innerOff <= charSize.bottom && innerOff >= charSize.top && Math.abs(x - charSize.right) < xDiff) { outside = false ch++ xDiff = x - charSize.right } } while (isExtendingChar(lineObj.text.charAt(ch))) ++ch; var pos = PosWithInfo(lineNo, ch, outside, 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 operationGroup = null; var nextOpId = 0; // Start a new operation. function startOperation(cm) { cm.curOp = { cm: cm, viewChanged: false, // Flag that indicates that lines might need to be redrawn startHeight: cm.doc.height, // Used to detect need to update scrollbar forceUpdate: false, // Used to force a redraw updateInput: 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 cursorActivityCalled: 0, // Tracks which cursorActivity handlers have been called already selectionChanged: false, // Whether the selection needs to be redrawn updateMaxLine: false, // Set when the widest line needs to be determined anew scrollLeft: null, scrollTop: null, // Intermediate scroll position, not pushed to DOM yet scrollToPos: null, // Used to scroll to a specific position focus: false, id: ++nextOpId // Unique ID }; if (operationGroup) { operationGroup.ops.push(cm.curOp); } else { cm.curOp.ownsGroup = operationGroup = { ops: [cm.curOp], delayedCallbacks: [] }; } } function fireCallbacksForOps(group) { // Calls delayed callbacks and cursorActivity handlers until no // new ones appear var callbacks = group.delayedCallbacks, i = 0; do { for (; i < callbacks.length; i++) callbacks[i].call(null); for (var j = 0; j < group.ops.length; j++) { var op = group.ops[j]; if (op.cursorActivityHandlers) while (op.cursorActivityCalled < op.cursorActivityHandlers.length) op.cursorActivityHandlers[op.cursorActivityCalled++].call(null, op.cm); } } while (i < callbacks.length); } // Finish an operation, updating the display and signalling delayed events function endOperation(cm) { var op = cm.curOp, group = op.ownsGroup; if (!group) return; try { fireCallbacksForOps(group); } finally { operationGroup = null; for (var i = 0; i < group.ops.length; i++) group.ops[i].cm.curOp = null; endOperations(group); } } // The DOM updates done when an operation finishes are batched so // that the minimum number of relayouts are required. function endOperations(group) { var ops = group.ops; for (var i = 0; i < ops.length; i++) // Read DOM endOperation_R1(ops[i]); for (var i = 0; i < ops.length; i++) // Write DOM (maybe) endOperation_W1(ops[i]); for (var i = 0; i < ops.length; i++) // Read DOM endOperation_R2(ops[i]); for (var i = 0; i < ops.length; i++) // Write DOM (maybe) endOperation_W2(ops[i]); for (var i = 0; i < ops.length; i++) // Read DOM endOperation_finish(ops[i]); } function endOperation_R1(op) { var cm = op.cm, display = cm.display; maybeClipScrollbars(cm); if (op.updateMaxLine) findMaxLine(cm); op.mustUpdate = op.viewChanged || op.forceUpdate || op.scrollTop != null || op.scrollToPos && (op.scrollToPos.from.line < display.viewFrom || op.scrollToPos.to.line >= display.viewTo) || display.maxLineChanged && cm.options.lineWrapping; op.update = op.mustUpdate && new DisplayUpdate(cm, op.mustUpdate && {top: op.scrollTop, ensure: op.scrollToPos}, op.forceUpdate); } function endOperation_W1(op) { op.updatedDisplay = op.mustUpdate && updateDisplayIfNeeded(op.cm, op.update); } function endOperation_R2(op) { var cm = op.cm, display = cm.display; if (op.updatedDisplay) updateHeightsInViewport(cm); op.barMeasure = measureForScrollbars(cm); // If the max line changed since it was last measured, measure it, // and ensure the document's width matches it. // updateDisplay_W2 will use these properties to do the actual resizing if (display.maxLineChanged && !cm.options.lineWrapping) { op.adjustWidthTo = measureChar(cm, display.maxLine, display.maxLine.text.length).left + 3; cm.display.sizerWidth = op.adjustWidthTo; op.barMeasure.scrollWidth = Math.max(display.scroller.clientWidth, display.sizer.offsetLeft + op.adjustWidthTo + scrollGap(cm) + cm.display.barWidth); op.maxScrollLeft = Math.max(0, display.sizer.offsetLeft + op.adjustWidthTo - displayWidth(cm)); } if (op.updatedDisplay || op.selectionChanged) op.preparedSelection = display.input.prepareSelection(op.focus); } function endOperation_W2(op) { var cm = op.cm; if (op.adjustWidthTo != null) { cm.display.sizer.style.minWidth = op.adjustWidthTo + "px"; if (op.maxScrollLeft < cm.doc.scrollLeft) setScrollLeft(cm, Math.min(cm.display.scroller.scrollLeft, op.maxScrollLeft), true); cm.display.maxLineChanged = false; } var takeFocus = op.focus && op.focus == activeElt() && (!document.hasFocus || document.hasFocus()) if (op.preparedSelection) cm.display.input.showSelection(op.preparedSelection, takeFocus); if (op.updatedDisplay || op.startHeight != cm.doc.height) updateScrollbars(cm, op.barMeasure); if (op.updatedDisplay) setDocumentHeight(cm, op.barMeasure); if (op.selectionChanged) restartBlink(cm); if (cm.state.focused && op.updateInput) cm.display.input.reset(op.typing); if (takeFocus) ensureFocus(op.cm); } function endOperation_finish(op) { var cm = op.cm, display = cm.display, doc = cm.doc; if (op.updatedDisplay) postUpdateDisplay(cm, op.update); // Abort mouse wheel delta measurement, when scrolling explicitly if (display.wheelStartX != null && (op.scrollTop != null || op.scrollLeft != null || op.scrollToPos)) display.wheelStartX = display.wheelStartY = null; // Propagate the scroll position to the actual DOM scroller if (op.scrollTop != null && (display.scroller.scrollTop != op.scrollTop || op.forceScroll)) { doc.scrollTop = Math.max(0, Math.min(display.scroller.scrollHeight - display.scroller.clientHeight, op.scrollTop)); display.scrollbars.setScrollTop(doc.scrollTop); display.scroller.scrollTop = doc.scrollTop; } if (op.scrollLeft != null && (display.scroller.scrollLeft != op.scrollLeft || op.forceScroll)) { doc.scrollLeft = Math.max(0, Math.min(display.scroller.scrollWidth - display.scroller.clientWidth, op.scrollLeft)); display.scrollbars.setScrollLeft(doc.scrollLeft); display.scroller.scrollLeft = doc.scrollLeft; alignHorizontally(cm); } // If we need to scroll a specific position into view, do so. if (op.scrollToPos) { var coords = scrollPosIntoView(cm, clipPos(doc, op.scrollToPos.from), clipPos(doc, op.scrollToPos.to), op.scrollToPos.margin); if (op.scrollToPos.isCursor && cm.state.focused) maybeScrollWindow(cm, coords); } // 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"); if (display.wrapper.offsetHeight) doc.scrollTop = cm.display.scroller.scrollTop; // Fire change events, and delayed event handlers if (op.changeObjs) signal(cm, "changes", cm, op.changeObjs); if (op.update) op.update.finish(); } // Run the given function in an operation function runInOp(cm, f) { if (cm.curOp) return f(); startOperation(cm); try { return f(); } finally { endOperation(cm); } } // Wraps a function in an operation. Returns the wrapped function. function operation(cm, f) { return function() { if (cm.curOp) return f.apply(cm, arguments); startOperation(cm); try { return f.apply(cm, arguments); } finally { endOperation(cm); } }; } // Used to add methods to editor and doc instances, wrapping them in // operations. function methodOp(f) { return function() { if (this.curOp) return f.apply(this, arguments); startOperation(this); try { return f.apply(this, arguments); } finally { endOperation(this); } }; } function docMethodOp(f) { return function() { var cm = this.cm; if (!cm || cm.curOp) return f.apply(this, arguments); startOperation(cm); try { return f.apply(this, arguments); } finally { endOperation(cm); } }; } // 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 || newN == cm.doc.first + cm.doc.size) 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; } // 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 && ie_version < 11) on(d.scroller, "dblclick", operation(cm, function(e) { if (signalDOMEvent(cm, e)) return; var pos = posFromMouse(cm, e); if (!pos || clickInGutter(cm, e) || eventInWidget(cm.display, e)) return; e_preventDefault(e); var word = cm.findWordAt(pos); extendSelection(cm.doc, word.anchor, word.head); })); else on(d.scroller, "dblclick", function(e) { signalDOMEvent(cm, e) || e_preventDefault(e); }); // Some browsers fire contextmenu *after* opening the menu, at // which point we can't mess with it anymore. Context menu is // handled in onMouseDown for these browsers. if (!captureRightClick) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);}); // Used to suppress mouse event handling when a touch happens var touchFinished, prevTouch = {end: 0}; function finishTouch() { if (d.activeTouch) { touchFinished = setTimeout(function() {d.activeTouch = null;}, 1000); prevTouch = d.activeTouch; prevTouch.end = +new Date; } }; function isMouseLikeTouchEvent(e) { if (e.touches.length != 1) return false; var touch = e.touches[0]; return touch.radiusX <= 1 && touch.radiusY <= 1; } function farAway(touch, other) { if (other.left == null) return true; var dx = other.left - touch.left, dy = other.top - touch.top; return dx * dx + dy * dy > 20 * 20; } on(d.scroller, "touchstart", function(e) { if (!signalDOMEvent(cm, e) && !isMouseLikeTouchEvent(e)) { clearTimeout(touchFinished); var now = +new Date; d.activeTouch = {start: now, moved: false, prev: now - prevTouch.end <= 300 ? prevTouch : null}; if (e.touches.length == 1) { d.activeTouch.left = e.touches[0].pageX; d.activeTouch.top = e.touches[0].pageY; } } }); on(d.scroller, "touchmove", function() { if (d.activeTouch) d.activeTouch.moved = true; }); on(d.scroller, "touchend", function(e) { var touch = d.activeTouch; if (touch && !eventInWidget(d, e) && touch.left != null && !touch.moved && new Date - touch.start < 300) { var pos = cm.coordsChar(d.activeTouch, "page"), range; if (!touch.prev || farAway(touch, touch.prev)) // Single tap range = new Range(pos, pos); else if (!touch.prev.prev || farAway(touch, touch.prev.prev)) // Double tap range = cm.findWordAt(pos); else // Triple tap range = new Range(Pos(pos.line, 0), clipPos(cm.doc, Pos(pos.line + 1, 0))); cm.setSelection(range.anchor, range.head); cm.focus(); e_preventDefault(e); } finishTouch(); }); on(d.scroller, "touchcancel", finishTouch); // Sync scrolling between fake scrollbars and real scrollable // area, ensure viewport is updated when scrolling. on(d.scroller, "scroll", function() { if (d.scroller.clientHeight) { setScrollTop(cm, d.scroller.scrollTop); setScrollLeft(cm, d.scroller.scrollLeft, true); signal(cm, "scroll", cm); } }); // Listen to wheel events in order to try and update the viewport on time. on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);}); on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);}); // Prevent wrapper from ever scrolling on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; }); d.dragFunctions = { enter: function(e) {if (!signalDOMEvent(cm, e)) e_stop(e);}, over: function(e) {if (!signalDOMEvent(cm, e)) { onDragOver(cm, e); e_stop(e); }}, start: function(e){onDragStart(cm, e);}, drop: operation(cm, onDrop), leave: function(e) {if (!signalDOMEvent(cm, e)) { clearDragCursor(cm); }} }; var inp = d.input.getField(); on(inp, "keyup", function(e) { onKeyUp.call(cm, e); }); on(inp, "keydown", operation(cm, onKeyDown)); on(inp, "keypress", operation(cm, onKeyPress)); on(inp, "focus", bind(onFocus, cm)); on(inp, "blur", bind(onBlur, cm)); } function dragDropChanged(cm, value, old) { var wasOn = old && old != CodeMirror.Init; if (!value != !wasOn) { var funcs = cm.display.dragFunctions; var toggle = value ? on : off; toggle(cm.display.scroller, "dragstart", funcs.start); toggle(cm.display.scroller, "dragenter", funcs.enter); toggle(cm.display.scroller, "dragover", funcs.over); toggle(cm.display.scroller, "dragleave", funcs.leave); toggle(cm.display.scroller, "drop", funcs.drop); } } // Called when the window resizes function onResize(cm) { var d = cm.display; if (d.lastWrapHeight == d.wrapper.clientHeight && d.lastWrapWidth == d.wrapper.clientWidth) return; // Might be a text scaling operation, clear size caches. d.cachedCharWidth = d.cachedTextHeight = d.cachedPaddingH = null; d.scrollbarsClipped = false; cm.setSize(); } // 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.nodeType == 1 && n.getAttribute("cm-ignore-events") == "true") || (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 && e_target(e).getAttribute("cm-not-content") == "true") return null; var x, y, space = display.lineSpace.getBoundingClientRect(); // Fails unpredictably on IE[67] when mouse is dragged around quickly. try { x = e.clientX - space.left; y = e.clientY - space.top; } catch (e) { return null; } var coords = coordsChar(cm, x, y), line; if (forRect && coords.xRel == 1 && (line = getLine(cm.doc, coords.line).text).length == coords.ch) { var colDiff = countColumn(line, line.length, cm.options.tabSize) - line.length; coords = Pos(coords.line, Math.max(0, Math.round((x - paddingH(cm.display).left) / charWidth(cm.display)) - colDiff)); } return coords; } // A mouse down can be a single click, double click, triple click, // start of selection drag, start of text drag, new cursor // (ctrl-click), rectangle drag (alt-drag), or xwin // middle-click-paste. Or it might be a click on something we should // not interfere with, such as a scrollbar or widget. function onMouseDown(e) { var cm = this, display = cm.display; if (signalDOMEvent(cm, e) || display.activeTouch && display.input.supportsTouch()) return; display.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: // #3261: make sure, that we're not starting a second selection if (cm.state.selectingText) cm.state.selectingText(e); else 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(function() {display.input.focus();}, 20); e_preventDefault(e); break; case 3: if (captureRightClick) onContextMenu(cm, e); else delayBlurEvent(cm); break; } } var lastClick, lastDoubleClick; function leftButtonDown(cm, e, start) { if (ie) setTimeout(bind(ensureFocus, cm), 0); else cm.curOp.focus = activeElt(); 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, modifier = mac ? e.metaKey : e.ctrlKey, contained; if (cm.options.dragDrop && dragAndDrop && !cm.isReadOnly() && type == "single" && (contained = sel.contains(start)) > -1 && (cmp((contained = sel.ranges[contained]).from(), start) < 0 || start.xRel > 0) && (cmp(contained.to(), start) > 0 || start.xRel < 0)) leftButtonStartDrag(cm, e, start, modifier); else leftButtonSelect(cm, e, start, type, modifier); } // 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, modifier) { var display = cm.display, startTime = +new Date; 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); if (!modifier && +new Date - 200 < startTime) extendSelection(cm.doc, start); // Work around unexplainable focus problem in IE9 (#2127) and Chrome (#3081) if (webkit || ie && ie_version == 9) setTimeout(function() {document.body.focus(); display.input.focus();}, 20); else display.input.focus(); } }); // Let the drag handler handle this. if (webkit) display.scroller.draggable = true; cm.state.draggingText = dragEnd; dragEnd.copy = mac ? e.altKey : e.ctrlKey // 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, ranges = startSel.ranges; if (addNew && !e.shiftKey) { ourIndex = doc.sel.contains(start); if (ourIndex > -1) ourRange = ranges[ourIndex]; else ourRange = new Range(start, start); } else { ourRange = doc.sel.primary(); ourIndex = doc.sel.primIndex; } if (chromeOS ? e.shiftKey && e.metaKey : 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 = cm.findWordAt(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) { ourIndex = ranges.length; setSelection(doc, normalizeSelection(ranges.concat([ourRange]), ourIndex), {scroll: false, origin: "*mouse"}); } else if (ranges.length > 1 && ranges[ourIndex].empty() && type == "single" && !e.shiftKey) { setSelection(doc, normalizeSelection(ranges.slice(0, ourIndex).concat(ranges.slice(ourIndex + 1)), 0), {scroll: false, origin: "*mouse"}); startSel = doc.sel; } else { replaceOneSelection(doc, ourIndex, ourRange, sel_mouse); } var lastPos = start; function extendTo(pos) { if (cmp(lastPos, pos) == 0) return; lastPos = pos; if (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), {origin: "*mouse", scroll: false}); cm.scrollIntoView(pos); } else { var oldRange = ourRange; var anchor = oldRange.anchor, head = pos; if (type != "single") { if (type == "double") var range = cm.findWordAt(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) { cm.curOp.focus = activeElt(); extendTo(cur); var visible = visibleLines(display, doc); if (cur.line >= visible.to || cur.line < visible.from) setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150); } else { var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0; if (outside) setTimeout(operation(cm, function() { if (counter != curCount) return; display.scroller.scrollTop += outside; extend(e); }), 50); } } function done(e) { cm.state.selectingText = false; counter = Infinity; e_preventDefault(e); display.input.focus(); off(document, "mousemove", move); off(document, "mouseup", up); doc.history.lastSelOrigin = null; } var move = operation(cm, function(e) { if (!e_button(e)) done(e); else extend(e); }); var up = operation(cm, done); cm.state.selectingText = up; 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) { 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]; signal(cm, type, cm, line, gutter, e); return e_defaultPrevented(e); } } } function clickInGutter(cm, e) { return gutterEvent(cm, e, "gutterClick", true); } // Kludge to work around strange IE behavior where it'll sometimes // re-fire a series of drag-related events right after the drop (#1551) var lastDrop = 0; function onDrop(e) { var cm = this; clearDragCursor(cm); if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; e_preventDefault(e); if (ie) lastDrop = +new Date; var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files; if (!pos || cm.isReadOnly()) return; // Might be a file drop, in which case we simply extract the text // and insert it. if (files && files.length && window.FileReader && window.File) { var n = files.length, text = Array(n), read = 0; var loadFile = function(file, i) { if (cm.options.allowDropFileTypes && indexOf(cm.options.allowDropFileTypes, file.type) == -1) return; var reader = new FileReader; reader.onload = operation(cm, function() { var content = reader.result; if (/[\x00-\x08\x0e-\x1f]{2}/.test(content)) content = ""; text[i] = content; if (++read == n) { pos = clipPos(cm.doc, pos); var change = {from: pos, to: pos, text: cm.doc.splitLines(text.join(cm.doc.lineSeparator())), origin: "paste"}; makeChange(cm.doc, change); setSelectionReplaceHistory(cm.doc, simpleSelection(pos, changeEnd(change))); } }); reader.readAsText(file); }; for (var i = 0; i < n; ++i) loadFile(files[i], i); } else { // Normal drop // Don't do a replace if the drop happened inside of the selected text. if (cm.state.draggingText && cm.doc.sel.contains(pos) > -1) { cm.state.draggingText(e); // Ensure the editor is re-focused setTimeout(function() {cm.display.input.focus();}, 20); return; } try { var text = e.dataTransfer.getData("Text"); if (text) { if (cm.state.draggingText && !cm.state.draggingText.copy) var selected = 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"); cm.display.input.focus(); } } catch(e){} } } function onDragStart(cm, e) { if (ie && (!cm.state.draggingText || +new Date - lastDrop < 100)) { e_stop(e); return; } if (signalDOMEvent(cm, e) || eventInWidget(cm.display, e)) return; e.dataTransfer.setData("Text", cm.getSelection()); e.dataTransfer.effectAllowed = "copyMove" // Use dummy image instead of default browsers image. // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there. if (e.dataTransfer.setDragImage && !safari) { var img = elt("img", null, null, "position: fixed; left: 0; top: 0;"); img.src = "data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw=="; if (presto) { img.width = img.height = 1; cm.display.wrapper.appendChild(img); // Force a relayout, or Opera won't use our image for some obscure reason img._top = img.offsetTop; } e.dataTransfer.setDragImage(img, 0, 0); if (presto) img.parentNode.removeChild(img); } } function onDragOver(cm, e) { var pos = posFromMouse(cm, e); if (!pos) return; var frag = document.createDocumentFragment(); drawSelectionCursor(cm, pos, frag); if (!cm.display.dragCursor) { cm.display.dragCursor = elt("div", null, "CodeMirror-cursors CodeMirror-dragcursors"); cm.display.lineSpace.insertBefore(cm.display.dragCursor, cm.display.cursorDiv); } removeChildrenAndAdd(cm.display.dragCursor, frag); } function clearDragCursor(cm) { if (cm.display.dragCursor) { cm.display.lineSpace.removeChild(cm.display.dragCursor); cm.display.dragCursor = null; } } // 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) updateDisplaySimple(cm, {top: val}); if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val; cm.display.scrollbars.setScrollTop(val); if (gecko) updateDisplaySimple(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; cm.display.scrollbars.setScrollLeft(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; var wheelEventDelta = function(e) { var dx = e.wheelDeltaX, dy = e.wheelDeltaY; if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail; if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail; else if (dy == null) dy = e.wheelDelta; return {x: dx, y: dy}; }; CodeMirror.wheelEventPixels = function(e) { var delta = wheelEventDelta(e); delta.x *= wheelPixelsPerUnit; delta.y *= wheelPixelsPerUnit; return delta; }; function onScrollWheel(cm, e) { var delta = wheelEventDelta(e), dx = delta.x, dy = delta.y; var display = cm.display, scroll = display.scroller; // Quit if there's nothing to scroll here var canScrollX = scroll.scrollWidth > scroll.clientWidth; var canScrollY = scroll.scrollHeight > scroll.clientHeight; if (!(dx && canScrollX || dy && canScrollY)) return; // Webkit browsers on OS X abort momentum scrolls when the target // of the scroll event is removed from the scrollable element. // This hack (see related code in patchDisplay) makes sure the // element is kept around. if (dy && mac && webkit) { outer: for (var cur = e.target, view = display.view; cur != scroll; cur = cur.parentNode) { for (var i = 0; i < view.length; i++) { if (view[i].node == cur) { cm.display.currentWheelTarget = cur; break outer; } } } } // On some browsers, horizontal scrolling will cause redraws to // happen before the gutter has been realigned, causing it to // wriggle around in a most unseemly way. When we have an // estimated pixels/delta value, we just handle horizontal // scrolling entirely here. It'll be slightly off from native, but // better than glitching out. if (dx && !gecko && !presto && wheelPixelsPerUnit != null) { if (dy && canScrollY) 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))); // Only prevent default scrolling if vertical scrolling is // actually possible. Otherwise, it causes vertical scroll // jitter on OSX trackpads when deltaX is small and deltaY // is large (issue #3579) if (!dy || (dy && canScrollY)) e_preventDefault(e); display.wheelStartX = null; // Abort measurement, if in progress return; } // 'Project' the visible viewport to cover the area that is being // scrolled into view (if we know enough to estimate it). if (dy && wheelPixelsPerUnit != null) { var pixels = dy * wheelPixelsPerUnit; var top = cm.doc.scrollTop, bot = top + display.wrapper.clientHeight; if (pixels < 0) top = Math.max(0, top + pixels - 50); else bot = Math.min(cm.doc.height, bot + pixels + 50); updateDisplaySimple(cm, {top: top, bottom: bot}); } if (wheelSamples < 20) { if (display.wheelStartX == null) { display.wheelStartX = scroll.scrollLeft; display.wheelStartY = scroll.scrollTop; display.wheelDX = dx; display.wheelDY = dy; setTimeout(function() { if (display.wheelStartX == null) return; var movedX = scroll.scrollLeft - display.wheelStartX; var movedY = scroll.scrollTop - display.wheelStartY; var sample = (movedY && display.wheelDY && movedY / display.wheelDY) || (movedX && display.wheelDX && movedX / display.wheelDX); display.wheelStartX = display.wheelStartY = null; if (!sample) return; wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1); ++wheelSamples; }, 200); } else { display.wheelDX += dx; display.wheelDY += dy; } } } // 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 cm.display.input.ensurePolled(); var prevShift = cm.display.shift, done = false; try { if (cm.isReadOnly()) cm.state.suppressEdits = true; if (dropShift) cm.display.shift = false; done = bound(cm) != Pass; } finally { cm.display.shift = prevShift; cm.state.suppressEdits = false; } return done; } function lookupKeyForEditor(cm, name, handle) { for (var i = 0; i < cm.state.keyMaps.length; i++) { var result = lookupKey(name, cm.state.keyMaps[i], handle, cm); if (result) return result; } return (cm.options.extraKeys && lookupKey(name, cm.options.extraKeys, handle, cm)) || lookupKey(name, cm.options.keyMap, handle, cm); } var stopSeq = new Delayed; function dispatchKey(cm, name, e, handle) { var seq = cm.state.keySeq; if (seq) { if (isModifierKey(name)) return "handled"; stopSeq.set(50, function() { if (cm.state.keySeq == seq) { cm.state.keySeq = null; cm.display.input.reset(); } }); name = seq + " " + name; } var result = lookupKeyForEditor(cm, name, handle); if (result == "multi") cm.state.keySeq = name; if (result == "handled") signalLater(cm, "keyHandled", cm, name, e); if (result == "handled" || result == "multi") { e_preventDefault(e); restartBlink(cm); } if (seq && !result && /\'$/.test(name)) { e_preventDefault(e); return true; } return !!result; } // Handle a key from the keydown event. function handleKeyBinding(cm, e) { var name = keyName(e, true); if (!name) return false; if (e.shiftKey && !cm.state.keySeq) { // First try to resolve full name (including 'Shift-'). Failing // that, see if there is a cursor-motion command (starting with // 'go') bound to the keyname without 'Shift-'. return dispatchKey(cm, "Shift-" + name, e, function(b) {return doHandleBinding(cm, b, true);}) || dispatchKey(cm, name, e, function(b) { if (typeof b == "string" ? /^go[A-Z]/.test(b) : b.motion) return doHandleBinding(cm, b); }); } else { return dispatchKey(cm, name, e, function(b) { return doHandleBinding(cm, b); }); } } // Handle a key from the keypress event function handleCharBinding(cm, e, ch) { return dispatchKey(cm, "'" + ch + "'", e, function(b) { return doHandleBinding(cm, b, true); }); } var lastStoppedKey = null; function onKeyDown(e) { var cm = this; cm.curOp.focus = activeElt(); if (signalDOMEvent(cm, e)) return; // IE does strange things with escape. if (ie && ie_version < 11 && e.keyCode == 27) e.returnValue = false; var code = e.keyCode; cm.display.shift = code == 16 || e.shiftKey; var handled = handleKeyBinding(cm, e); if (presto) { lastStoppedKey = handled ? code : null; // Opera has no cut event... we try to at least catch the key combo if (!handled && code == 88 && !hasCopyEvent && (mac ? e.metaKey : e.ctrlKey)) cm.replaceSelection("", null, "cut"); } // Turn mouse into crosshair when Alt is held on Mac. if (code == 18 && !/\bCodeMirror-crosshair\b/.test(cm.display.lineDiv.className)) showCrossHair(cm); } function showCrossHair(cm) { var lineDiv = cm.display.lineDiv; addClass(lineDiv, "CodeMirror-crosshair"); function up(e) { if (e.keyCode == 18 || !e.altKey) { rmClass(lineDiv, "CodeMirror-crosshair"); off(document, "keyup", up); off(document, "mouseover", up); } } on(document, "keyup", up); on(document, "mouseover", up); } function onKeyUp(e) { if (e.keyCode == 16) this.doc.sel.shift = false; signalDOMEvent(this, e); } function onKeyPress(e) { var cm = this; if (eventInWidget(cm.display, e) || signalDOMEvent(cm, e) || e.ctrlKey && !e.altKey || mac && e.metaKey) return; var keyCode = e.keyCode, charCode = e.charCode; if (presto && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;} if ((presto && (!e.which || e.which < 10)) && handleKeyBinding(cm, e)) return; var ch = String.fromCharCode(charCode == null ? keyCode : charCode); if (handleCharBinding(cm, e, ch)) return; cm.display.input.onKeyPress(e); } // FOCUS/BLUR EVENTS function delayBlurEvent(cm) { cm.state.delayingBlurEvent = true; setTimeout(function() { if (cm.state.delayingBlurEvent) { cm.state.delayingBlurEvent = false; onBlur(cm); } }, 100); } function onFocus(cm) { if (cm.state.delayingBlurEvent) cm.state.delayingBlurEvent = false; if (cm.options.readOnly == "nocursor") return; if (!cm.state.focused) { signal(cm, "focus", cm); cm.state.focused = true; addClass(cm.display.wrapper, "CodeMirror-focused"); // This test prevents this from firing when a context // menu is closed (since the input reset would kill the // select-all detection hack) if (!cm.curOp && cm.display.selForContextMenu != cm.doc.sel) { cm.display.input.reset(); if (webkit) setTimeout(function() { cm.display.input.reset(true); }, 20); // Issue #1730 } cm.display.input.receivedFocus(); } restartBlink(cm); } function onBlur(cm) { if (cm.state.delayingBlurEvent) return; 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 // To make the context menu work, we need to briefly unhide the // textarea (making it as unobtrusive as possible) to let the // right-click take effect on it. function onContextMenu(cm, e) { if (eventInWidget(cm.display, e) || contextMenuInGutter(cm, e)) return; if (signalDOMEvent(cm, e, "contextmenu")) return; cm.display.input.onContextMenu(e); } function contextMenuInGutter(cm, e) { if (!hasHandler(cm, "gutterContextMenu")) return false; return gutterEvent(cm, e, "gutterContextMenu", false); } // 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 && !allowSelectionOnly) return; var hist = doc.history, event, selAfter = doc.sel; var source = type == "undo" ? hist.done : hist.undone, dest = type == "undo" ? hist.undone : hist.done; // Verify that there is a useable event (so that ctrl-z won't // needlessly clear selection events) 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) : lst(source); makeChangeSingleDoc(doc, change, after, mergeOldSpans(doc, change)); if (!i && doc.cm) doc.cm.scrollIntoView({from: change.from, to: changeEnd(change)}); var rebased = []; // Propagate to the linked documents linkedDocs(doc, function(doc, sharedHist) { if (!sharedHist && indexOf(rebased, doc.history) == -1) { rebaseHist(doc.history, change); rebased.push(doc.history); } makeChangeSingleDoc(doc, change, null, mergeOldSpans(doc, change)); }); } } // Sub-views need their line numbers shifted when text is added // above or below them in the parent document. function shiftDoc(doc, distance) { if (distance == 0) return; doc.first += distance; doc.sel = new Selection(map(doc.sel.ranges, function(range) { return new Range(Pos(range.anchor.line + distance, range.anchor.ch), Pos(range.head.line + distance, range.head.ch)); }), doc.sel.primIndex); if (doc.cm) { regChange(doc.cm, doc.first, doc.first - distance, distance); for (var d = doc.cm.display, l = d.viewFrom; l < d.viewTo; l++) regLineChange(doc.cm, l, "gutter"); } } // More lower-level change function, handling only a single document // (not linked ones). function makeChangeSingleDoc(doc, change, selAfter, spans) { if (doc.cm && !doc.cm.curOp) return operation(doc.cm, makeChangeSingleDoc)(doc, change, selAfter, spans); if (change.to.line < doc.first) { shiftDoc(doc, change.text.length - 1 - (change.to.line - change.from.line)); return; } if (change.from.line > doc.lastLine()) return; // Clip the change to the size of this doc if (change.from.line < doc.first) { var shift = change.text.length - 1 - (doc.first - change.from.line); shiftDoc(doc, shift); change = {from: Pos(doc.first, 0), to: Pos(change.to.line + shift, change.to.ch), text: [lst(change.text)], origin: change.origin}; } var last = doc.lastLine(); if (change.to.line > last) { change = {from: change.from, to: Pos(last, getLine(doc, last).text.length), text: [change.text[0]], origin: change.origin}; } change.removed = getBetween(doc, change.from, change.to); if (!selAfter) selAfter = computeSelAfterChange(doc, change); if (doc.cm) makeChangeSingleDocInEditor(doc.cm, change, spans); else updateDoc(doc, change, spans); setSelectionNoUndo(doc, selAfter, sel_dontScroll); } // Handle the interaction of a change to a document with the editor // that this document is part of. function makeChangeSingleDocInEditor(cm, change, spans) { var doc = cm.doc, display = cm.display, from = change.from, to = change.to; var recomputeMaxLength = false, checkWidthStart = from.line; if (!cm.options.lineWrapping) { checkWidthStart = lineNo(visualLine(getLine(doc, from.line))); doc.iter(checkWidthStart, to.line + 1, function(line) { if (line == display.maxLine) { recomputeMaxLength = true; return true; } }); } if (doc.sel.contains(change.from, change.to) > -1) signalCursorActivity(cm); updateDoc(doc, change, spans, estimateHeight(cm)); if (!cm.options.lineWrapping) { doc.iter(checkWidthStart, from.line + change.text.length, function(line) { var len = lineLength(line); if (len > display.maxLineLength) { display.maxLine = line; display.maxLineLength = len; display.maxLineChanged = true; recomputeMaxLength = false; } }); if (recomputeMaxLength) cm.curOp.updateMaxLine = true; } // 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 (change.full) regChange(cm); else if (from.line == to.line && change.text.length == 1 && !isWholeLineUpdate(cm.doc, change)) regLineChange(cm, from.line, "text"); else regChange(cm, from.line, to.line + 1, lendiff); var changesHandler = hasHandler(cm, "changes"), changeHandler = hasHandler(cm, "change"); if (changeHandler || changesHandler) { var obj = { from: from, to: to, text: change.text, removed: change.removed, origin: change.origin }; if (changeHandler) signalLater(cm, "change", cm, obj); if (changesHandler) (cm.curOp.changeObjs || (cm.curOp.changeObjs = [])).push(obj); } cm.display.selForContextMenu = null; } function replaceRange(doc, code, from, to, origin) { if (!to) to = from; if (cmp(to, from) < 0) { var tmp = to; to = from; from = tmp; } if (typeof code == "string") code = doc.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) { if (signalDOMEvent(cm, "scrollCursorIntoView")) return; 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 + scrollGap(cm) + display.barHeight) + "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 limit = 0; limit < 5; limit++) { 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) break; } 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 = displayHeight(cm), result = {}; if (y2 - y1 > screen) y2 = y1 + screen; 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 = displayWidth(cm) - (cm.options.fixedGutter ? display.gutters.offsetWidth : 0); var tooWide = x2 - x1 > screenw; if (tooWide) x2 = x1 + screenw; if (x1 < 10) result.scrollLeft = 0; else if (x1 < screenleft) result.scrollLeft = Math.max(0, x1 - (tooWide ? 0 : 10)); else if (x2 > screenw + screenleft - 3) result.scrollLeft = x2 + (tooWide ? 0 : 10) - screenw; return result; } // Store a relative adjustment to the scroll position in the current // operation (to be applied when the operation finishes). function 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 (!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 = doc.mode.indent(state, line.text.slice(curSpaceString.length), line.text); if (indentation == Pass || indentation > 150) { if (!aggressive) return; how = "prev"; } } if (how == "prev") { if (n > doc.first) indentation = countColumn(getLine(doc, n-1).text, null, tabSize); else indentation = 0; } else if (how == "add") { indentation = curSpace + cm.options.indentUnit; } else if (how == "subtract") { indentation = curSpace - cm.options.indentUnit; } else if (typeof how == "number") { indentation = curSpace + how; } indentation = Math.max(0, indentation); var indentString = "", pos = 0; if (cm.options.indentWithTabs) for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";} if (pos < indentation) indentString += spaceStr(indentation - pos); if (indentString != curSpaceString) { replaceRange(doc, indentString, Pos(n, 0), Pos(n, curSpaceString.length), "+input"); line.stateAfter = null; return true; } else { // Ensure that, if the cursor was in the whitespace at the start // of the line, it is moved to the end of that space. for (var i = 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; } } } } // Utility for applying a change to a line by handle or number, // returning the number and optionally registering the line as // changed. function changeLine(doc, handle, changeType, op) { var no = handle, line = handle; if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle)); else no = lineNo(handle); if (no == null) return null; if (op(line, no) && doc.cm) regLineChange(doc.cm, no, changeType); return line; } // 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); function findNextLine() { var l = line + dir; if (l < doc.first || l >= doc.first + doc.size) return 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 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"; var helper = doc.cm && doc.cm.getHelper(pos, "wordChars"); for (var first = true;; first = false) { if (dir < 0 && !moveOnce(!first)) break; var cur = lineObj.text.charAt(ch) || "\n"; var type = isWordChar(cur, helper) ? "w" : group && cur == "\n" ? "n" : !group || /\s/.test(cur) ? null : "p"; if (group && !first && !type) type = "s"; if (sawType && sawType != type) { if (dir < 0) {dir = 1; moveOnce();} break; } if (type) sawType = type; if (dir > 0 && !moveOnce(!first)) break; } } var result = skipAtomic(doc, Pos(line, ch), pos, origDir, true); if (!cmp(pos, result)) result.hitSide = true; return result; } // For relative vertical movement. Dir may be -1 or 1. Unit can be // "page" or "line". The resulting position will have a hitSide=true // property if it reached the end of the document. function findPosV(cm, pos, dir, unit) { var doc = cm.doc, x = pos.left, y; if (unit == "page") { var pageSize = Math.min(cm.display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight); 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; } // 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(); this.display.input.focus();}, setOption: function(option, value) { var options = this.options, old = options[option]; if (options[option] == value && option != "mode") return; options[option] = value; if (optionHandlers.hasOwnProperty(option)) operation(this, optionHandlers[option])(this, value, old); }, getOption: function(option) {return this.options[option];}, getDoc: function() {return this.doc;}, addKeyMap: function(map, bottom) { this.state.keyMaps[bottom ? "push" : "unshift"](getKeyMap(map)); }, removeKeyMap: function(map) { var maps = this.state.keyMaps; for (var i = 0; i < maps.length; ++i) if (maps[i] == map || 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."); insertSorted(this.state.overlays, {mode: mode, modeSpec: spec, opaque: options && options.opaque, priority: (options && options.priority) || 0}, function(overlay) { return overlay.priority }) this.state.modeGen++; regChange(this); }), removeOverlay: methodOp(function(spec) { var 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 from = range.from(), to = range.to(); var start = Math.max(end, from.line); end = Math.min(this.lastLine(), to.line - (to.ch ? 0 : 1)) + 1; for (var j = start; j < end; ++j) indentLine(this, j, how); var newRanges = this.doc.sel.ranges; if (from.ch == 0 && ranges.length == newRanges.length && newRanges[i].from().ch > 0) replaceOneSelection(this.doc, i, new Range(from, newRanges[i].to()), sel_dontScroll); } 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) { return takeToken(this, pos, precise); }, getLineTokens: function(line, precise) { return takeToken(this, Pos(line), precise, true); }, getTokenTypeAt: function(pos) { pos = clipPos(this.doc, pos); var styles = getLineStyles(this, getLine(this.doc, pos.line)); var before = 0, after = (styles.length - 1) / 2, ch = pos.ch; var type; if (ch == 0) type = styles[2]; else for (;;) { var mid = (before + after) >> 1; if ((mid ? styles[mid * 2 - 1] : 0) >= ch) after = mid; else if (styles[mid * 2 + 1] < ch) before = mid + 1; else { type = styles[mid * 2 + 2]; break; } } var cut = type ? type.indexOf("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 found; var help = helpers[type], mode = this.getModeAt(pos); if (typeof mode[type] == "string") { if (help[mode[type]]) found.push(help[mode[type]]); } else if (mode[type]) { for (var i = 0; i < mode[type].length; i++) { var val = help[mode[type][i]]; if (val) found.push(val); } } else if (mode.helperType && help[mode.helperType]) { found.push(help[mode.helperType]); } else if (help[mode.name]) { found.push(help[mode.name]); } for (var i = 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, lineObj; if (typeof line == "number") { var last = this.doc.first + this.doc.size - 1; if (line < this.doc.first) line = this.doc.first; else if (line > last) { line = last; end = true; } lineObj = getLine(this.doc, line); } else { lineObj = line; } return intoCoordSystem(this, lineObj, {top: 0, left: 0}, mode || "page").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.doc, 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; }); }), 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"; node.setAttribute("cm-ignore-events", "true"); this.display.input.setUneditable(node); display.sizer.appendChild(node); if (vert == "over") { top = pos.top; } else if (vert == "above" || vert == "near") { var vspace = Math.max(display.wrapper.clientHeight, this.doc.height), hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth); // Default to positioning above (if specified and possible); otherwise default to positioning below if ((vert == 'above' || pos.bottom + node.offsetHeight > vspace) && pos.top > node.offsetHeight) top = pos.top - node.offsetHeight; else if (pos.bottom + node.offsetHeight <= vspace) top = pos.bottom; if (left + node.offsetWidth > hspace) left = hspace - node.offsetWidth; } node.style.top = top + "px"; node.style.left = node.style.right = ""; if (horiz == "right") { left = display.sizer.clientWidth - node.offsetWidth; node.style.right = "0px"; } else { if (horiz == "left") left = 0; else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2; node.style.left = left + "px"; } if (scroll) scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight); }, triggerOnKeyDown: methodOp(onKeyDown), triggerOnKeyPress: methodOp(onKeyPress), triggerOnKeyUp: onKeyUp, execCommand: function(cmd) { if (commands.hasOwnProperty(cmd)) return commands[cmd].call(null, this); }, triggerElectric: methodOp(function(text) { triggerElectric(this, text); }), findPosH: function(from, amount, unit, visually) { var 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]; }), // Find the word at the given position (as returned by coordsChar). findWordAt: function(pos) { var doc = this.doc, line = getLine(doc, pos.line).text; var start = pos.ch, end = pos.ch; if (line) { var helper = this.getHelper(pos, "wordChars"); if ((pos.xRel < 0 || end == line.length) && start) --start; else ++end; var startChar = line.charAt(start); var check = isWordChar(startChar, helper) ? function(ch) { return isWordChar(ch, helper); } : /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} : function(ch) {return !/\s/.test(ch) && !isWordChar(ch);}; while (start > 0 && check(line.charAt(start - 1))) --start; while (end < line.length && check(line.charAt(end))) ++end; } return new Range(Pos(pos.line, start), Pos(pos.line, end)); }, toggleOverwrite: function(value) { if (value != null && value == this.state.overwrite) return; if (this.state.overwrite = !this.state.overwrite) addClass(this.display.cursorDiv, "CodeMirror-overwrite"); else rmClass(this.display.cursorDiv, "CodeMirror-overwrite"); signal(this, "overwriteToggle", this, this.state.overwrite); }, hasFocus: function() { return this.display.input.getField() == activeElt(); }, isReadOnly: function() { return !!(this.options.readOnly || this.doc.cantEdit); }, scrollTo: methodOp(function(x, y) { 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; return {left: scroller.scrollLeft, top: scroller.scrollTop, height: scroller.scrollHeight - scrollGap(this) - this.display.barHeight, width: scroller.scrollWidth - scrollGap(this) - this.display.barWidth, clientHeight: displayHeight(this), clientWidth: displayWidth(this)}; }, scrollIntoView: methodOp(function(range, 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) { var cm = this; function interpret(val) { return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val; } if (width != null) cm.display.wrapper.style.width = interpret(width); if (height != null) cm.display.wrapper.style.height = interpret(height); if (cm.options.lineWrapping) clearLineMeasurementCache(this); var lineNo = cm.display.viewFrom; cm.doc.iter(lineNo, cm.display.viewTo, function(line) { if (line.widgets) for (var i = 0; i < line.widgets.length; i++) if (line.widgets[i].noHScroll) { regLineChange(cm, lineNo, "widget"); break; } ++lineNo; }); cm.curOp.forceUpdate = true; signal(cm, "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); this.display.input.reset(); this.scrollTo(doc.scrollLeft, doc.scrollTop); this.curOp.forceScroll = true; signalLater(this, "swapDoc", this, old); return old; }), getInputField: function(){return this.display.input.getField();}, getWrapperElement: function(){return this.display.wrapper;}, getScrollerElement: function(){return this.display.scroller;}, getGutterElement: function(){return this.display.gutters;} }; eventMixin(CodeMirror); // 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("lineSeparator", null, function(cm, val) { cm.doc.lineSep = val; if (!val) return; var newBreaks = [], lineNo = cm.doc.first; cm.doc.iter(function(line) { for (var pos = 0;;) { var found = line.text.indexOf(val, pos); if (found == -1) break; pos = found + val.length; newBreaks.push(Pos(lineNo, found)); } lineNo++; }); for (var i = newBreaks.length - 1; i >= 0; i--) replaceRange(cm.doc, val, newBreaks[i], Pos(newBreaks[i].line, newBreaks[i].ch + val.length)) }); option("specialChars", /[\u0000-\u001f\u007f\u00ad\u200b-\u200f\u2028\u2029\ufeff]/g, function(cm, val, old) { cm.state.specialChars = new RegExp(val.source + (val.test("\t") ? "" : "|\t"), "g"); if (old != CodeMirror.Init) cm.refresh(); }); option("specialCharPlaceholder", defaultSpecialCharPlaceholder, function(cm) {cm.refresh();}, true); option("electricChars", true); option("inputStyle", mobile ? "contenteditable" : "textarea", function() { throw new Error("inputStyle can not (yet) be changed in a running editor"); // FIXME }, true); option("spellcheck", false, function(cm, val) { cm.getInputField().spellcheck = val }, true); option("rtlMoveVisually", !windows); option("wholeLineUpdateBefore", true); option("theme", "default", function(cm) { themeChanged(cm); guttersChanged(cm); }, true); option("keyMap", "default", function(cm, val, old) { var next = getKeyMap(val); var prev = old != CodeMirror.Init && getKeyMap(old); if (prev && prev.detach) prev.detach(cm, next); if (next.attach) next.attach(cm, prev || null); }); 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, function(cm) {updateScrollbars(cm);}, true); option("scrollbarStyle", "native", function(cm) { initScrollbars(cm); updateScrollbars(cm); cm.display.scrollbars.setScrollTop(cm.doc.scrollTop); cm.display.scrollbars.setScrollLeft(cm.doc.scrollLeft); }, true); option("lineNumbers", false, function(cm) { 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("lineWiseCopyCut", 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; } cm.display.input.readOnlyChanged(val) }); option("disableInput", false, function(cm, val) {if (!val) cm.display.input.reset();}, true); option("dragDrop", true, dragDropChanged); option("allowDropFileTypes", null); option("cursorBlinkRate", 530); option("cursorScrollMargin", 0); option("cursorHeight", 1, updateSelection, true); option("singleCursorHeightPerLine", true, updateSelection, true); option("workTime", 100); option("workDelay", 100); option("flattenSpans", true, resetModeState, true); option("addModeClass", false, resetModeState, true); option("pollInterval", 100); option("undoDepth", 200, function(cm, val){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.input.resetPosition(); }); option("tabindex", null, function(cm, val) { cm.display.input.getField().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 = Array.prototype.slice.call(arguments, 2); 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"); } else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+json$/.test(spec)) { return CodeMirror.resolveMode("application/json"); } if (typeof spec == "string") return {name: spec}; else return spec || {name: "null"}; }; // Given a mode spec (anything that resolveMode accepts), find and // initialize an actual mode object. 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()}; }); }, delWrappedLineLeft: function(cm) { deleteNearSelection(cm, function(range) { var top = cm.charCoords(range.head, "div").top + 5; var leftPos = cm.coordsChar({left: 0, top: top}, "div"); return {from: leftPos, to: range.from()}; }); }, delWrappedLineRight: function(cm) { deleteNearSelection(cm, function(range) { var top = cm.charCoords(range.head, "div").top + 5; var rightPos = cm.coordsChar({left: cm.display.lineDiv.offsetWidth + 100, top: top}, "div"); return {from: range.from(), to: rightPos }; }); }, undo: function(cm) {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); }, {origin: "+move", bias: 1}); }, goLineStartSmart: function(cm) { cm.extendSelectionsBy(function(range) { return lineStartSmart(cm, range.head); }, {origin: "+move", bias: 1}); }, goLineEnd: function(cm) { cm.extendSelectionsBy(function(range) { return lineEnd(cm, range.head.line); }, {origin: "+move", bias: -1}); }, 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); }, goLineLeftSmart: function(cm) { cm.extendSelectionsBy(function(range) { var top = cm.charCoords(range.head, "div").top + 5; var pos = cm.coordsChar({left: 0, top: top}, "div"); if (pos.ch < cm.getLine(pos.line).search(/\S/)) return lineStartSmart(cm, range.head); return pos; }, sel_move); }, goLineUp: function(cm) {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(spaceStr(tabSize - col % tabSize)); } 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(), newSel = []; for (var i = 0; i < ranges.length; i++) { var cur = ranges[i].head, line = getLine(cm.doc, cur.line).text; if (line) { if (cur.ch == line.length) cur = new Pos(cur.line, cur.ch - 1); if (cur.ch > 0) { cur = new Pos(cur.line, cur.ch + 1); cm.replaceRange(line.charAt(cur.ch - 1) + line.charAt(cur.ch - 2), Pos(cur.line, cur.ch - 2), cur, "+transpose"); } else if (cur.line > cm.doc.first) { var prev = getLine(cm.doc, cur.line - 1).text; if (prev) cm.replaceRange(line.charAt(0) + cm.doc.lineSeparator() + prev.charAt(prev.length - 1), Pos(cur.line - 1, prev.length - 1), Pos(cur.line, 1), "+transpose"); } } newSel.push(new Range(cur, cur)); } cm.setSelections(newSel); }); }, 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(cm.doc.lineSeparator(), range.anchor, range.head, "+input"); cm.indentLine(range.from().line + 1, null, true); } ensureCursorVisible(cm); }); }, openLine: function(cm) {cm.replaceSelection("\n", "start")}, 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-End": "goDocEnd", "Ctrl-Up": "goLineUp", "Ctrl-Down": "goLineDown", "Ctrl-Left": "goGroupLeft", "Ctrl-Right": "goGroupRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd", "Ctrl-Backspace": "delGroupBefore", "Ctrl-Delete": "delGroupAfter", "Ctrl-S": "save", "Ctrl-F": "find", "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll", "Ctrl-[": "indentLess", "Ctrl-]": "indentMore", "Ctrl-U": "undoSelection", "Shift-Ctrl-U": "redoSelection", "Alt-U": "redoSelection", fallthrough: "basic" }; // Very basic readline/emacs-style bindings, which are standard on Mac. keyMap.emacsy = { "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown", "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd", "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore", "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars", "Ctrl-O": "openLine" }; keyMap.macDefault = { "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo", "Cmd-Home": "goDocStart", "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goGroupLeft", "Alt-Right": "goGroupRight", "Cmd-Left": "goLineLeft", "Cmd-Right": "goLineRight", "Alt-Backspace": "delGroupBefore", "Ctrl-Alt-Backspace": "delGroupAfter", "Alt-Delete": "delGroupAfter", "Cmd-S": "save", "Cmd-F": "find", "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll", "Cmd-[": "indentLess", "Cmd-]": "indentMore", "Cmd-Backspace": "delWrappedLineLeft", "Cmd-Delete": "delWrappedLineRight", "Cmd-U": "undoSelection", "Shift-Cmd-U": "redoSelection", "Ctrl-Up": "goDocStart", "Ctrl-Down": "goDocEnd", fallthrough: ["basic", "emacsy"] }; keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault; // KEYMAP DISPATCH function normalizeKeyName(name) { var parts = name.split(/-(?!$)/), name = parts[parts.length - 1]; var alt, ctrl, shift, cmd; for (var i = 0; i < parts.length - 1; i++) { var mod = parts[i]; if (/^(cmd|meta|m)$/i.test(mod)) cmd = true; else if (/^a(lt)?$/i.test(mod)) alt = true; else if (/^(c|ctrl|control)$/i.test(mod)) ctrl = true; else if (/^s(hift)$/i.test(mod)) shift = true; else throw new Error("Unrecognized modifier name: " + mod); } if (alt) name = "Alt-" + name; if (ctrl) name = "Ctrl-" + name; if (cmd) name = "Cmd-" + name; if (shift) name = "Shift-" + name; return name; } // This is a kludge to keep keymaps mostly working as raw objects // (backwards compatibility) while at the same time support features // like normalization and multi-stroke key bindings. It compiles a // new normalized keymap, and then updates the old object to reflect // this. CodeMirror.normalizeKeyMap = function(keymap) { var copy = {}; for (var keyname in keymap) if (keymap.hasOwnProperty(keyname)) { var value = keymap[keyname]; if (/^(name|fallthrough|(de|at)tach)$/.test(keyname)) continue; if (value == "...") { delete keymap[keyname]; continue; } var keys = map(keyname.split(" "), normalizeKeyName); for (var i = 0; i < keys.length; i++) { var val, name; if (i == keys.length - 1) { name = keys.join(" "); val = value; } else { name = keys.slice(0, i + 1).join(" "); val = "..."; } var prev = copy[name]; if (!prev) copy[name] = val; else if (prev != val) throw new Error("Inconsistent bindings for " + name); } delete keymap[keyname]; } for (var prop in copy) keymap[prop] = copy[prop]; return keymap; }; var lookupKey = CodeMirror.lookupKey = function(key, map, handle, context) { map = getKeyMap(map); var found = map.call ? map.call(key, context) : map[key]; if (found === false) return "nothing"; if (found === "...") return "multi"; if (found != null && handle(found)) return "handled"; if (map.fallthrough) { if (Object.prototype.toString.call(map.fallthrough) != "[object Array]") return lookupKey(key, map.fallthrough, handle, context); for (var i = 0; i < map.fallthrough.length; i++) { var result = lookupKey(key, map.fallthrough[i], handle, context); if (result) return result; } } }; // Modifier key presses don't count as 'real' key presses for the // purpose of keymap fallthrough. var isModifierKey = CodeMirror.isModifierKey = function(value) { var name = typeof value == "string" ? value : keyNames[value.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 base = keyNames[event.keyCode], name = base; if (name == null || event.altGraphKey) return false; if (event.altKey && base != "Alt") name = "Alt-" + name; if ((flipCtrlCmd ? event.metaKey : event.ctrlKey) && base != "Ctrl") name = "Ctrl-" + name; if ((flipCtrlCmd ? event.ctrlKey : event.metaKey) && base != "Cmd") name = "Cmd-" + name; if (!noShift && event.shiftKey && base != "Shift") name = "Shift-" + name; return name; }; function getKeyMap(val) { return typeof val == "string" ? keyMap[val] : val; } // FROMTEXTAREA CodeMirror.fromTextArea = function(textarea, options) { options = options ? copyObj(options) : {}; options.value = textarea.value; if (!options.tabindex && textarea.tabIndex) options.tabindex = textarea.tabIndex; if (!options.placeholder && textarea.placeholder) options.placeholder = textarea.placeholder; // Set autofocus to true if this textarea is focused, or if it has // autofocus and no other element is focused. if (options.autofocus == null) { var hasFocus = activeElt(); options.autofocus = hasFocus == textarea || textarea.getAttribute("autofocus") != null && hasFocus == document.body; } function save() {textarea.value = cm.getValue();} if (textarea.form) { on(textarea.form, "submit", save); // Deplorable hack to make the submit method do the right thing. if (!options.leaveSubmitMethodAlone) { var form = textarea.form, realSubmit = form.submit; try { var wrappedSubmit = form.submit = function() { save(); form.submit = realSubmit; form.submit(); form.submit = wrappedSubmit; }; } catch(e) {} } } options.finishInit = function(cm) { cm.save = save; cm.getTextArea = function() { return textarea; }; cm.toTextArea = function() { cm.toTextArea = isNaN; // Prevent this from being ran twice save(); textarea.parentNode.removeChild(cm.getWrapperElement()); textarea.style.display = ""; if (textarea.form) { off(textarea.form, "submit", save); if (typeof textarea.form.submit == "function") textarea.form.submit = realSubmit; } }; }; textarea.style.display = "none"; var cm = CodeMirror(function(node) { textarea.parentNode.insertBefore(node, textarea.nextSibling); }, options); 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 nextMarkerId = 0; var TextMarker = CodeMirror.TextMarker = function(doc, type) { this.lines = []; this.type = type; this.doc = doc; this.id = ++nextMarkerId; }; 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.setAttribute("cm-ignore-events", "true"); if (options.insertLeft) marker.widgetNode.insertLeft = true; } if (marker.collapsed) { if (conflictingCollapsedRange(doc, from.line, from, to, marker) || from.line != to.line && conflictingCollapsedRange(doc, to.line, from, to, marker)) throw new Error("Inserting collapsed marker partially overlapping an existing one"); 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 || marker.css) 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) { if (change.full) return null; var oldFirst = isLine(doc, change.from.line) && getLine(doc, change.from.line).markedSpans; var oldLast = isLine(doc, change.to.line) && getLine(doc, change.to.line).markedSpans; if (!oldFirst && !oldLast) return null; var startCh = change.from.ch, endCh = change.to.ch, isInsert = cmp(change.from, change.to) == 0; // Get the spans that 'stick out' on both sides var first = markedSpansBefore(oldFirst, startCh, isInsert); var last = markedSpansAfter(oldLast, endCh, isInsert); // Next, merge those two ends var sameLine = change.text.length == 1, offset = lst(change.text).length + (sameLine ? startCh : 0); if (first) { // Fix up .to properties of first for (var i = 0; i < first.length; ++i) { var span = first[i]; if (span.to == null) { var found = getMarkedSpanFor(last, span.marker); if (!found) span.to = startCh; else if (sameLine) span.to = found.to == null ? null : found.to + offset; } } } if (last) { // Fix up .from in last (or move them into first in case of sameLine) for (var i = 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 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.to, from) >= 0 : cmp(found.to, from) > 0) || fromCmp >= 0 && (sp.marker.inclusiveRight && marker.inclusiveLeft ? cmp(found.from, to) <= 0 : cmp(found.from, to) < 0)) return true; } } // A visual line is a line as drawn on the screen. Folding, for // example, can cause multiple logical lines to appear on the same // visual line. This finds the start of the visual line that the // given line is part of (usually that is the line itself). function visualLine(line) { var merged; while (merged = collapsedSpanAtStart(line)) line = merged.find(-1, true).line; return line; } // 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(doc, node, options) { if (options) for (var opt in options) if (options.hasOwnProperty(opt)) this[opt] = options[opt]; this.doc = doc; 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.doc.cm, ws = this.line.widgets, line = this.line, no = lineNo(line); if (no == null || !ws) return; for (var i = 0; i < ws.length; ++i) if (ws[i] == this) ws.splice(i--, 1); if (!ws.length) line.widgets = null; var height = widgetHeight(this); updateLineHeight(line, Math.max(0, line.height - height)); if (cm) runInOp(cm, function() { adjustScrollWhenAboveVisible(cm, line, -height); regLineChange(cm, no, "widget"); }); }; LineWidget.prototype.changed = function() { var oldH = this.height, cm = this.doc.cm, line = this.line; this.height = null; var diff = widgetHeight(this) - oldH; if (!diff) return; updateLineHeight(line, line.height + diff); if (cm) runInOp(cm, function() { cm.curOp.forceUpdate = true; adjustScrollWhenAboveVisible(cm, line, diff); }); }; function widgetHeight(widget) { if (widget.height != null) return widget.height; var cm = widget.doc.cm; if (!cm) return 0; if (!contains(document.body, widget.node)) { var parentStyle = "position: relative;"; if (widget.coverGutter) parentStyle += "margin-left: -" + cm.display.gutters.offsetWidth + "px;"; if (widget.noHScroll) parentStyle += "width: " + cm.display.wrapper.clientWidth + "px;"; removeChildrenAndAdd(cm.display.measure, elt("div", [widget.node], null, parentStyle)); } return widget.height = widget.node.parentNode.offsetHeight; } function addLineWidget(doc, handle, node, options) { var widget = new LineWidget(doc, node, options); var cm = doc.cm; if (cm && widget.noHScroll) cm.display.alignWidgets = true; changeLine(doc, handle, "widget", function(line) { var widgets = line.widgets || (line.widgets = []); if (widget.insertAt == null) widgets.push(widget); else widgets.splice(Math.min(widgets.length - 1, Math.max(0, widget.insertAt)), 0, widget); widget.line = line; if (cm && !lineIsHidden(doc, line)) { var aboveVisible = heightAtLine(line) < doc.scrollTop; updateLineHeight(line, line.height + widgetHeight(widget)); if (aboveVisible) 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, inner) { for (var i = 0; i < 10; i++) { if (inner) inner[0] = CodeMirror.innerMode(mode, state).mode; var style = mode.token(stream, state); if (stream.pos > stream.start) return style; } throw new Error("Mode " + mode.name + " failed to advance stream."); } // Utility for getTokenAt and getLineTokens function takeToken(cm, pos, precise, asArray) { function getObj(copy) { return {start: stream.start, end: stream.pos, string: stream.current(), type: style || null, state: copy ? copyState(doc.mode, state) : state}; } var doc = cm.doc, mode = doc.mode, style; pos = clipPos(doc, pos); var line = getLine(doc, pos.line), state = getStateBefore(cm, pos.line, precise); var stream = new StringStream(line.text, cm.options.tabSize), tokens; if (asArray) tokens = []; while ((asArray || stream.pos < pos.ch) && !stream.eol()) { stream.start = stream.pos; style = readToken(mode, stream, state); if (asArray) tokens.push(getObj(true)); } return asArray ? tokens : getObj(); } // 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; var inner = cm.options.addModeClass && [null]; 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, inner), lineClasses); } if (inner) { var mName = inner[0].name; if (mName) style = "m-" + (style ? mName + " " + style : mName); } if (!flattenSpans || curStyle != style) { while (curStart < stream.start) { curStart = Math.min(stream.start, curStart + 50000); f(curStart, curStyle); } curStyle = style; } stream.start = stream.pos; } while (curStart < stream.pos) { // Webkit seems to refuse to render text nodes longer than 57444 characters 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, updateFrontier) { if (!line.styles || line.styles[0] != cm.state.modeGen) { var state = getStateBefore(cm, lineNo(line)); var result = highlightLine(cm, line, line.text.length > cm.options.maxHighlightLength ? copyState(cm.doc.mode, state) : state); line.stateAfter = state; line.styles = result.styles; if (result.classes) line.styleClasses = result.classes; else if (line.styleClasses) line.styleClasses = null; if (updateFrontier === cm.doc.frontier) cm.doc.frontier++; } 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()) { 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], "CodeMirror-line"), content: content, col: 0, pos: 0, cm: cm, trailingSpace: false, splitSpaces: (ie || webkit) && cm.getOption("lineWrapping")}; lineView.measure = {}; // Iterate over the logical lines that make up this visual line. for (var i = 0; i <= (lineView.rest ? lineView.rest.length : 0); i++) { var line = i ? lineView.rest[i - 1] : lineView.line, order; builder.pos = 0; builder.addToken = buildToken; // Optionally wire in some hacks into the token-rendering // algorithm, to deal with browser quirks. if (hasBadBidiRects(cm.display.measure) && (order = getOrder(line))) builder.addToken = buildTokenBadBidi(builder.addToken, order); builder.map = []; var allowFrontierUpdate = lineView != cm.display.externalMeasured && lineNo(line); insertLineContent(line, builder, getLineStyles(cm, line, allowFrontierUpdate)); if (line.styleClasses) { if (line.styleClasses.bgClass) builder.bgClass = joinClasses(line.styleClasses.bgClass, builder.bgClass || ""); if (line.styleClasses.textClass) builder.textClass = joinClasses(line.styleClasses.textClass, builder.textClass || ""); } // Ensure at least a single node is present, for measuring. if (builder.map.length == 0) builder.map.push(0, 0, builder.content.appendChild(zeroWidthElement(cm.display.measure))); // Store the map and a cache object for the current logical line if (i == 0) { lineView.measure.map = builder.map; lineView.measure.cache = {}; } else { (lineView.measure.maps || (lineView.measure.maps = [])).push(builder.map); (lineView.measure.caches || (lineView.measure.caches = [])).push({}); } } // See issue #2901 if (webkit) { var last = builder.content.lastChild if (/\bcm-tab\b/.test(last.className) || (last.querySelector && last.querySelector(".cm-tab"))) builder.content.className = "cm-tab-wrap-hack"; } signal(cm, "renderLine", cm, lineView.line, builder.pre); if (builder.pre.className) builder.textClass = joinClasses(builder.pre.className, builder.textClass || ""); return builder; } function defaultSpecialCharPlaceholder(ch) { var token = elt("span", "\u2022", "cm-invalidchar"); token.title = "\\u" + ch.charCodeAt(0).toString(16); token.setAttribute("aria-label", token.title); return token; } // Build up the DOM representation for a single token, and add it to // the line map. Takes care to render special characters separately. function buildToken(builder, text, style, startStyle, endStyle, title, css) { if (!text) return; var displayText = builder.splitSpaces ? splitSpaces(text, builder.trailingSpace) : text var special = builder.cm.state.specialChars, mustWrap = false; if (!special.test(text)) { builder.col += text.length; var content = document.createTextNode(displayText); builder.map.push(builder.pos, builder.pos + text.length, content); if (ie && ie_version < 9) mustWrap = true; builder.pos += text.length; } else { 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(displayText.slice(pos, pos + skipped)); if (ie && ie_version < 9) content.appendChild(elt("span", [txt])); else content.appendChild(txt); builder.map.push(builder.pos, builder.pos + skipped, txt); builder.col += skipped; builder.pos += skipped; } if (!m) break; pos += skipped + 1; 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")); txt.setAttribute("role", "presentation"); txt.setAttribute("cm-text", "\t"); builder.col += tabWidth; } else if (m[0] == "\r" || m[0] == "\n") { var txt = content.appendChild(elt("span", m[0] == "\r" ? "\u240d" : "\u2424", "cm-invalidchar")); txt.setAttribute("cm-text", m[0]); builder.col += 1; } else { var txt = builder.cm.options.specialCharPlaceholder(m[0]); txt.setAttribute("cm-text", m[0]); if (ie && ie_version < 9) content.appendChild(elt("span", [txt])); else content.appendChild(txt); builder.col += 1; } builder.map.push(builder.pos, builder.pos + 1, txt); builder.pos++; } } builder.trailingSpace = displayText.charCodeAt(text.length - 1) == 32 if (style || startStyle || endStyle || mustWrap || css) { var fullStyle = style || ""; if (startStyle) fullStyle += startStyle; if (endStyle) fullStyle += endStyle; var token = elt("span", [content], fullStyle, css); if (title) token.title = title; return builder.content.appendChild(token); } builder.content.appendChild(content); } function splitSpaces(text, trailingBefore) { if (text.length > 1 && !/ /.test(text)) return text var spaceBefore = trailingBefore, result = "" for (var i = 0; i < text.length; i++) { var ch = text.charAt(i) if (ch == " " && spaceBefore && (i == text.length - 1 || text.charCodeAt(i + 1) == 32)) ch = "\u00a0" result += ch spaceBefore = ch == " " } return result } // Work around nonsense dimensions being reported for stretches of // right-to-left text. function buildTokenBadBidi(inner, order) { return function(builder, text, style, startStyle, endStyle, title, css) { 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, css); inner(builder, text.slice(0, part.to - start), style, startStyle, null, title, css); startStyle = null; text = text.slice(part.to - start); start = part.to; } }; } function buildCollapsedSpan(builder, size, marker, ignoreWidget) { var widget = !ignoreWidget && marker.widgetNode; if (widget) builder.map.push(builder.pos, builder.pos + size, widget); if (!ignoreWidget && builder.cm.display.input.needsContentAttribute) { if (!widget) widget = builder.content.appendChild(document.createElement("span")); widget.setAttribute("cm-marker", marker.id); } if (widget) { builder.cm.display.input.setUneditable(widget); builder.content.appendChild(widget); } builder.pos += size; builder.trailingSpace = false } // Outputs a number of spans to make up a line, taking highlighting // and marked text into account. function insertLineContent(line, builder, styles) { var spans = line.markedSpans, allText = line.text, at = 0; if (!spans) { for (var i = 1; 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, css; var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, title, collapsed; for (;;) { if (nextChange == pos) { // Update current marker set spanStyle = spanEndStyle = spanStartStyle = title = css = ""; collapsed = null; nextChange = Infinity; var foundBookmarks = [], endStyles for (var j = 0; j < spans.length; ++j) { var sp = spans[j], m = sp.marker; if (m.type == "bookmark" && sp.from == pos && m.widgetNode) { foundBookmarks.push(m); } else if (sp.from <= pos && (sp.to == null || sp.to > pos || m.collapsed && sp.to == pos && sp.from == pos)) { if (sp.to != null && sp.to != pos && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; } if (m.className) spanStyle += " " + m.className; if (m.css) css = (css ? css + ";" : "") + m.css; if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle; if (m.endStyle && sp.to == nextChange) (endStyles || (endStyles = [])).push(m.endStyle, sp.to) 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 (endStyles) for (var j = 0; j < endStyles.length; j += 2) if (endStyles[j + 1] == nextChange) spanEndStyle += " " + endStyles[j] if (!collapsed || collapsed.from == pos) for (var j = 0; j < foundBookmarks.length; ++j) buildCollapsedSpan(builder, 0, foundBookmarks[j]); if (collapsed && (collapsed.from || 0) == pos) { buildCollapsedSpan(builder, (collapsed.to == null ? len + 1 : collapsed.to) - pos, collapsed.marker, collapsed.from == null); if (collapsed.to == null) return; if (collapsed.to == pos) collapsed = false; } } if (pos >= len) break; var upto = Math.min(len, nextChange); while (true) { if (text) { var end = pos + text.length; if (!collapsed) { var tokenText = end > upto ? text.slice(0, upto - pos) : text; builder.addToken(builder, tokenText, style ? style + spanStyle : spanStyle, spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "", title, css); } 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); } function linesFor(start, end) { for (var i = start, result = []; i < end; ++i) result.push(new Line(text[i], spansFor(i), estimateHeight)); return result; } var from = change.from, to = change.to, text = change.text; var firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line); var lastText = lst(text), lastSpans = spansFor(text.length - 1), nlines = to.line - from.line; // Adjust the line structure if (change.full) { doc.insert(0, linesFor(0, text.length)); doc.remove(text.length, doc.size - text.length); } else if (isWholeLineUpdate(doc, change)) { // This is a whole-line replace. Treated specially to make // sure line objects move the way they are supposed to. var added = linesFor(0, text.length - 1); update(lastLine, lastLine.text, lastSpans); if (nlines) doc.remove(from.line, nlines); if (added.length) doc.insert(from.line, added); } else if (firstLine == lastLine) { if (text.length == 1) { update(firstLine, firstLine.text.slice(0, from.ch) + lastText + firstLine.text.slice(to.ch), lastSpans); } else { var added = linesFor(1, text.length - 1); 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); var added = linesFor(1, text.length - 1); 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) { // To avoid memory thrashing when child.lines is huge (e.g. first view of a large file), it's never spliced. // Instead, small slices are taken. They're taken in order because sequential memory accesses are fastest. var remaining = child.lines.length % 25 + 25 for (var pos = remaining; pos < child.lines.length;) { var leaf = new LeafChunk(child.lines.slice(pos, pos += 25)); child.height -= leaf.height; this.children.splice(++i, 0, leaf); leaf.parent = this; } child.lines = child.lines.slice(0, remaining); 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, lineSep) { if (!(this instanceof Doc)) return new Doc(text, mode, firstLine, lineSep); 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; this.lineSep = lineSep; this.extend = false; if (typeof text == "string") text = this.splitLines(text); updateDoc(this, {from: start, to: start, text: text}); setSelection(this, simpleSelection(start), sel_dontScroll); }; Doc.prototype = createObj(BranchChunk.prototype, { constructor: Doc, // Iterate over the document. Supports two forms -- with only one // argument, it calls that for each line in the document. With // three, it iterates over the range given by the first two (with // the second being non-inclusive). iter: function(from, to, op) { if (op) this.iterN(from - this.first, to - from, op); else this.iterN(this.first, this.first + this.size, from); }, // Non-public interface for adding and removing lines. insert: function(at, lines) { var height = 0; for (var i = 0; i < lines.length; ++i) height += lines[i].height; this.insertInner(at - this.first, lines, height); }, remove: function(at, n) { this.removeInner(at - this.first, n); }, // From here, the methods are part of the public interface. Most // are also available from CodeMirror (editor) instances. getValue: function(lineSep) { var lines = getLines(this, this.first, this.first + this.size); if (lineSep === false) return lines; return lines.join(lineSep || this.lineSeparator()); }, setValue: docMethodOp(function(code) { var top = Pos(this.first, 0), last = this.first + this.size - 1; makeChange(this, {from: top, to: Pos(last, getLine(this, last).text.length), text: this.splitLines(code), origin: "setValue", full: true}, true); 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 || this.lineSeparator()); }, getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;}, getLineHandle: function(line) {if (isLine(this, line)) return getLine(this, line);}, getLineNumber: function(line) {return lineNo(line);}, getLineHandleVisualStart: function(line) { if (typeof line == "number") line = getLine(this, line); return visualLine(line); }, lineCount: function() {return this.size;}, firstLine: function() {return this.first;}, lastLine: function() {return this.first + this.size - 1;}, clipPos: function(pos) {return clipPos(this, pos);}, getCursor: function(start) { var range = 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) { var heads = map(this.sel.ranges, f); extendSelections(this, clipPosArray(this, heads), 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 || this.lineSeparator()); }, 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 || this.lineSeparator()); parts[i] = sel; } return parts; }, replaceSelection: function(code, collapse, origin) { var dup = []; for (var i = 0; i < this.sel.ranges.length; i++) dup[i] = code; this.replaceSelections(dup, collapse, origin || "+input"); }, replaceSelections: docMethodOp(function(code, collapse, origin) { var 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: this.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.lastSelOp = this.history.lastOrigin = null; return this.history.generation; }, isClean: function (gen) { return this.history.generation == (gen || this.cleanGeneration); }, getHistory: function() { return {done: copyHistoryArray(this.history.done), undone: copyHistoryArray(this.history.undone)}; }, setHistory: function(histData) { var hist = this.history = new History(this.history.maxGeneration); hist.done = copyHistoryArray(histData.done.slice(0), null, true); hist.undone = copyHistoryArray(histData.undone.slice(0), null, true); }, addLineClass: docMethodOp(function(handle, where, cls) { return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) { var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : where == "gutter" ? "gutterClass" : "wrapClass"; if (!line[prop]) line[prop] = cls; else if (classTest(cls).test(line[prop])) return false; else line[prop] += " " + cls; return true; }); }), removeLineClass: docMethodOp(function(handle, where, cls) { return changeLine(this, handle, where == "gutter" ? "gutter" : "class", function(line) { var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : where == "gutter" ? "gutterClass" : "wrapClass"; var cur = line[prop]; if (!cur) return false; else if (cls == null) line[prop] = null; else { var found = cur.match(classTest(cls)); if (!found) return false; var end = found.index + found[0].length; line[prop] = cur.slice(0, found.index) + (!found.index || end == cur.length ? "" : " ") + cur.slice(end) || null; } return true; }); }), addLineWidget: docMethodOp(function(handle, node, options) { return addLineWidget(this, handle, node, options); }), removeLineWidget: function(widget) { widget.clear(); }, markText: function(from, to, options) { return markText(this, clipPos(this, from), clipPos(this, to), options, options && options.type || "range"); }, setBookmark: function(pos, options) { var realOpts = {replacedWith: options && (options.nodeType == null ? options.widget : options), insertLeft: options && options.insertLeft, clearWhenEmpty: false, shared: options && options.shared, handleMouseEvents: options && options.handleMouseEvents}; pos = clipPos(this, pos); return markText(this, pos, pos, realOpts, "bookmark"); }, findMarksAt: function(pos) { pos = clipPos(this, pos); var markers = [], spans = getLine(this, pos.line).markedSpans; if (spans) for (var i = 0; i < spans.length; ++i) { var span = spans[i]; if ((span.from == null || span.from <= pos.ch) && (span.to == null || span.to >= pos.ch)) markers.push(span.marker.parent || span.marker); } return markers; }, findMarks: function(from, to, filter) { from = clipPos(this, from); to = clipPos(this, to); var found = [], lineNo = from.line; this.iter(from.line, to.line + 1, function(line) { var spans = line.markedSpans; if (spans) for (var i = 0; i < spans.length; i++) { var span = spans[i]; if (!(span.to != null && lineNo == from.line && from.ch >= span.to || span.from == null && lineNo != from.line || span.from != null && 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, sepSize = this.lineSeparator().length; this.iter(function(line) { var sz = line.text.length + sepSize; 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; var sepSize = this.lineSeparator().length; this.iter(this.first, coords.line, function (line) { index += line.text.length + sepSize; }); return index; }, copy: function(copyHistory) { var doc = new Doc(getLines(this, this.first, this.first + this.size), this.modeOption, this.first, this.lineSep); doc.scrollTop = this.scrollTop; doc.scrollLeft = this.scrollLeft; doc.sel = this.sel; doc.extend = false; if (copyHistory) { doc.history.undoDepth = this.history.undoDepth; doc.setHistory(this.getHistory()); } return doc; }, linkedDoc: function(options) { if (!options) options = {}; var from = this.first, to = this.first + this.size; if (options.from != null && options.from > from) from = options.from; if (options.to != null && options.to < to) to = options.to; var copy = new Doc(getLines(this, from, to), options.mode || this.modeOption, from, this.lineSep); 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;}, splitLines: function(str) { if (this.lineSep) return str.split(this.lineSep); return splitLinesAuto(str); }, lineSeparator: function() { return this.lineSep || "\n"; } }); // 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 constructor".split(" "); for (var prop in Doc.prototype) if (Doc.prototype.hasOwnProperty(prop) && indexOf(dontDelegate, prop) < 0) CodeMirror.prototype[prop] = (function(method) { return function() {return method.apply(this.doc, arguments);}; })(Doc.prototype[prop]); eventMixin(Doc); // 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 = this.lastSelOp = null; this.lastOrigin = this.lastSelOrigin = null; // Used by the isClean() method this.generation = this.maxGeneration = startGen || 1; } // Create a history change event from an updateDoc-style change // object. function historyChangeFromChange(doc, change) { var histChange = {from: copyPos(change.from), to: changeEnd(change), text: getBetween(doc, change.from, change.to)}; attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1); linkedDocs(doc, function(doc) {attachLocalSpans(doc, histChange, change.from.line, change.to.line + 1);}, true); return histChange; } // Pop all selection events off the end of a history array. Stop at // a change event. function clearSelectionEvents(array) { while (array.length) { var last = lst(array); if (last.ranges) array.pop(); else break; } } // Find the top change event in the history. Pop off selection // events that are in the way. function lastChangeEvent(hist, force) { if (force) { clearSelectionEvents(hist.done); return lst(hist.done); } else if (hist.done.length && !lst(hist.done).ranges) { return lst(hist.done); } else if (hist.done.length > 1 && !hist.done[hist.done.length - 2].ranges) { hist.done.pop(); return lst(hist.done); } } // Register a change in the history. Merges changes that are within // a single operation, or are close together with an origin that // allows merging (starting with "+") into a single event. function addChangeToHistory(doc, change, selAfter, opId) { var hist = doc.history; hist.undone.length = 0; var time = +new Date, cur; 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 = hist.lastSelOp = opId; hist.lastOrigin = hist.lastSelOrigin = change.origin; if (!last) signal(doc, "historyAdded"); } function selectionEventCanBeMerged(doc, origin, prev, sel) { var ch = origin.charAt(0); return ch == "*" || ch == "+" && prev.ranges.length == sel.ranges.length && prev.somethingSelected() == sel.somethingSelected() && new Date - doc.history.lastSelTime <= (doc.cm ? doc.cm.options.historyEventDelay : 500); } // Called whenever the selection changes, sets the new selection as // the pending selection in the history, and pushes the old pending // selection into the 'done' array when it was significantly // different (in number of selected ranges, emptiness, or time). function addSelectionToHistory(doc, sel, opId, options) { var hist = doc.history, origin = options && options.origin; // A new event is started when the previous origin does not match // the current, or the origins don't allow matching. Origins // starting with * are always merged, those starting with + are // merged when similar and close together in time. if (opId == hist.lastSelOp || (origin && hist.lastSelOrigin == origin && (hist.lastModTime == hist.lastSelTime && hist.lastOrigin == origin || selectionEventCanBeMerged(doc, origin, lst(hist.done), sel)))) hist.done[hist.done.length - 1] = sel; else pushSelectionToHistory(sel, hist.done); hist.lastSelTime = +new Date; hist.lastSelOrigin = origin; hist.lastSelOp = opId; if (options && options.clearRedo !== false) clearSelectionEvents(hist.undone); } function pushSelectionToHistory(sel, dest) { var top = lst(dest); if (!(top && top.ranges && top.equals(sel))) dest.push(sel); } // Used to store marked span information in the history. function attachLocalSpans(doc, change, from, to) { var existing = change["spans_" + doc.id], n = 0; doc.iter(Math.max(doc.first, from), Math.min(doc.first + doc.size, to), function(line) { if (line.markedSpans) (existing || (existing = change["spans_" + doc.id] = {}))[n] = line.markedSpans; ++n; }); } // When un/re-doing restores text containing marked spans, those // that have been explicitly cleared should not be restored. function removeClearedSpans(spans) { if (!spans) return null; 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 noHandlers = [] function getHandlers(emitter, type, copy) { var arr = emitter._handlers && emitter._handlers[type] if (copy) return arr && arr.length > 0 ? arr.slice() : noHandlers else return arr || noHandlers } 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 handlers = getHandlers(emitter, type, false) for (var i = 0; i < handlers.length; ++i) if (handlers[i] == f) { handlers.splice(i, 1); break; } } }; var signal = CodeMirror.signal = function(emitter, type /*, values...*/) { var handlers = getHandlers(emitter, type, true) if (!handlers.length) return; var args = Array.prototype.slice.call(arguments, 2); for (var i = 0; i < handlers.length; ++i) handlers[i].apply(null, args); }; var orphanDelayedCallbacks = null; // Often, we want to signal events at a point where we are in the // middle of some work, but don't want the handler to start calling // other methods on the editor, which might be in an inconsistent // state or simply not expect any other events to happen. // signalLater looks whether there are any handlers, and schedules // them to be executed when the last operation ends, or, if no // operation is active, when a timeout fires. function signalLater(emitter, type /*, values...*/) { var arr = getHandlers(emitter, type, false) if (!arr.length) return; var args = Array.prototype.slice.call(arguments, 2), list; if (operationGroup) { list = operationGroup.delayedCallbacks; } else if (orphanDelayedCallbacks) { list = orphanDelayedCallbacks; } else { list = orphanDelayedCallbacks = []; setTimeout(fireOrphanDelayed, 0); } function bnd(f) {return function(){f.apply(null, args);};}; for (var i = 0; i < arr.length; ++i) list.push(bnd(arr[i])); } function fireOrphanDelayed() { var delayed = orphanDelayedCallbacks; orphanDelayedCallbacks = 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) { if (typeof e == "string") e = {type: e, preventDefault: function() { this.defaultPrevented = true; }}; signal(cm, override || e.type, cm, e); return e_defaultPrevented(e) || e.codemirrorIgnore; } function signalCursorActivity(cm) { var arr = cm._handlers && cm._handlers.cursorActivity; if (!arr) return; var set = cm.curOp.cursorActivityHandlers || (cm.curOp.cursorActivityHandlers = []); for (var i = 0; i < arr.length; ++i) if (indexOf(set, arr[i]) == -1) set.push(arr[i]); } function hasHandler(emitter, type) { return getHandlers(emitter, type).length > 0 } // Add on and off methods to a constructor's prototype, to make // registering events on such objects more convenient. function eventMixin(ctor) { ctor.prototype.on = function(type, f) {on(this, type, f);}; ctor.prototype.off = function(type, f) {off(this, type, f);}; } // MISC UTILITIES // Number of pixels added to scroller and sizer to hide scrollbar var scrollerGap = 30; // Returned or thrown by various protocols to signal 'I'm not // handling this'. var Pass = 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. var findColumn = CodeMirror.findColumn = function(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; } function map(array, f) { var out = []; for (var i = 0; i < array.length; i++) out[i] = f(array[i], i); return out; } function insertSorted(array, value, score) { var pos = 0, priority = score(value) while (pos < array.length && score(array[pos]) <= priority) pos++ array.splice(pos, 0, value) } function nothing() {} function createObj(base, props) { var inst; if (Object.create) { inst = Object.create(base); } else { nothing.prototype = base; inst = new nothing(); } if (props) copyObj(props, inst); return inst; }; 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\u0587\u0590-\u05f4\u0600-\u06ff\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc\uac00-\ud7af]/; var isWordCharBasic = CodeMirror.isWordChar = function(ch) { return /\w/.test(ch) || ch > "\x80" && (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch)); }; function isWordChar(ch, helper) { if (!helper) return isWordCharBasic(ch); if (helper.source.indexOf("\\w") > -1 && isWordCharBasic(ch)) return true; return helper.test(ch); } function isEmpty(obj) { for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) return false; return true; } // Extending unicode characters. A series of a non-extending char + // any number of extending chars is treated as a single unit as far // as editing and measuring is concerned. This is not fully correct, // since some scripts/fonts/browsers also treat other configurations // of code points as a group. var extendingChars = /[\u0300-\u036f\u0483-\u0489\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u065e\u0670\u06d6-\u06dc\u06de-\u06e4\u06e7\u06e8\u06ea-\u06ed\u0711\u0730-\u074a\u07a6-\u07b0\u07eb-\u07f3\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0900-\u0902\u093c\u0941-\u0948\u094d\u0951-\u0955\u0962\u0963\u0981\u09bc\u09be\u09c1-\u09c4\u09cd\u09d7\u09e2\u09e3\u0a01\u0a02\u0a3c\u0a41\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a70\u0a71\u0a75\u0a81\u0a82\u0abc\u0ac1-\u0ac5\u0ac7\u0ac8\u0acd\u0ae2\u0ae3\u0b01\u0b3c\u0b3e\u0b3f\u0b41-\u0b44\u0b4d\u0b56\u0b57\u0b62\u0b63\u0b82\u0bbe\u0bc0\u0bcd\u0bd7\u0c3e-\u0c40\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0cbc\u0cbf\u0cc2\u0cc6\u0ccc\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0d3e\u0d41-\u0d44\u0d4d\u0d57\u0d62\u0d63\u0dca\u0dcf\u0dd2-\u0dd4\u0dd6\u0ddf\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0eb1\u0eb4-\u0eb9\u0ebb\u0ebc\u0ec8-\u0ecd\u0f18\u0f19\u0f35\u0f37\u0f39\u0f71-\u0f7e\u0f80-\u0f84\u0f86\u0f87\u0f90-\u0f97\u0f99-\u0fbc\u0fc6\u102d-\u1030\u1032-\u1037\u1039\u103a\u103d\u103e\u1058\u1059\u105e-\u1060\u1071-\u1074\u1082\u1085\u1086\u108d\u109d\u135f\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b7-\u17bd\u17c6\u17c9-\u17d3\u17dd\u180b-\u180d\u18a9\u1920-\u1922\u1927\u1928\u1932\u1939-\u193b\u1a17\u1a18\u1a56\u1a58-\u1a5e\u1a60\u1a62\u1a65-\u1a6c\u1a73-\u1a7c\u1a7f\u1b00-\u1b03\u1b34\u1b36-\u1b3a\u1b3c\u1b42\u1b6b-\u1b73\u1b80\u1b81\u1ba2-\u1ba5\u1ba8\u1ba9\u1c2c-\u1c33\u1c36\u1c37\u1cd0-\u1cd2\u1cd4-\u1ce0\u1ce2-\u1ce8\u1ced\u1dc0-\u1de6\u1dfd-\u1dff\u200c\u200d\u20d0-\u20f0\u2cef-\u2cf1\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua66f-\ua672\ua67c\ua67d\ua6f0\ua6f1\ua802\ua806\ua80b\ua825\ua826\ua8c4\ua8e0-\ua8f1\ua926-\ua92d\ua947-\ua951\ua980-\ua982\ua9b3\ua9b6-\ua9b9\ua9bc\uaa29-\uaa2e\uaa31\uaa32\uaa35\uaa36\uaa43\uaa4c\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uabe5\uabe8\uabed\udc00-\udfff\ufb1e\ufe00-\ufe0f\ufe20-\ufe26\uff9e\uff9f]/; function isExtendingChar(ch) { return ch.charCodeAt(0) >= 768 && extendingChars.test(ch); } // 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, endNode) { var r = document.createRange(); r.setEnd(endNode || node, end); r.setStart(node, start); return r; }; else range = function(node, start, end) { var r = document.body.createTextRange(); try { r.moveToElementText(node.parentNode); } catch(e) { return r; } r.collapse(true); r.moveEnd("character", end); r.moveStart("character", start); return r; }; function 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); } var contains = CodeMirror.contains = function(parent, child) { if (child.nodeType == 3) // Android browser always returns false when child is a textnode child = child.parentNode; if (parent.contains) return parent.contains(child); do { if (child.nodeType == 11) child = child.host; if (child == parent) return true; } while (child = child.parentNode); }; function activeElt() { var activeElement = document.activeElement; while (activeElement && activeElement.root && activeElement.root.activeElement) activeElement = activeElement.root.activeElement; return activeElement; } // Older versions of IE throws unspecified error when touching // document.activeElement in some cases (during loading, in iframe) if (ie && ie_version < 11) activeElt = function() { try { return document.activeElement; } catch(e) { return document.body; } }; function classTest(cls) { return new RegExp("(^|\\s)" + cls + "(?:$|\\s)\\s*"); } var rmClass = CodeMirror.rmClass = function(node, cls) { var current = node.className; var match = classTest(cls).exec(current); if (match) { var after = current.slice(match.index + match[0].length); node.className = current.slice(0, match.index) + (after ? match[1] + after : ""); } }; var addClass = CodeMirror.addClass = function(node, cls) { var current = node.className; if (!classTest(cls).test(current)) node.className += (current ? " " : "") + cls; }; function joinClasses(a, b) { var as = a.split(" "); for (var i = 0; i < as.length; i++) if (as[i] && !classTest(as[i]).test(b)) b += " " + as[i]; return b; } // WINDOW-WIDE EVENTS // These must be handled carefully, because naively registering a // handler for each editor will cause the editors to never be // garbage collected. function forEachCodeMirror(f) { if (!document.body.getElementsByClassName) return; var byClass = document.body.getElementsByClassName("CodeMirror"); for (var i = 0; i < byClass.length; i++) { var cm = byClass[i].CodeMirror; if (cm) f(cm); } } var globalsRegistered = false; function ensureGlobalHandlers() { if (globalsRegistered) return; registerGlobalHandlers(); globalsRegistered = true; } function registerGlobalHandlers() { // When the window resizes, we need to refresh active editors. var resizeTimer; on(window, "resize", function() { if (resizeTimer == null) resizeTimer = setTimeout(function() { resizeTimer = null; forEachCodeMirror(onResize); }, 100); }); // When the window loses focus, we want to show the editor as blurred on(window, "blur", function() { forEachCodeMirror(onBlur); }); } // 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 && ie_version < 9) return false; var div = elt('div'); return "draggable" in div || "dragDrop" in div; }(); var zwspSupported; function zeroWidthElement(measure) { if (zwspSupported == null) { var test = elt("span", "\u200b"); removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")])); if (measure.firstChild.offsetHeight != 0) zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !(ie && ie_version < 8); } var node = zwspSupported ? elt("span", "\u200b") : elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px"); node.setAttribute("cm-text", ""); return node; } // Feature-detect IE's crummy client rect reporting for bidi text var badBidiRects; function hasBadBidiRects(measure) { if (badBidiRects != null) return badBidiRects; var txt = removeChildrenAndAdd(measure, document.createTextNode("A\u062eA")); var r0 = range(txt, 0, 1).getBoundingClientRect(); var r1 = range(txt, 1, 2).getBoundingClientRect(); removeChildren(measure); if (!r0 || r0.left == r0.right) return false; // Safari returns null in some cases (#2780) return badBidiRects = (r1.right - r0.right < 3); } // See if "".split is the broken IE version, if so, provide an // alternative way to split lines. var splitLinesAuto = 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"; })(); var badZoomedRects = null; function hasBadZoomedRects(measure) { if (badZoomedRects != null) return badZoomedRects; var node = removeChildrenAndAdd(measure, elt("span", "x")); var normal = node.getBoundingClientRect(); var fromRange = range(node, 0, 1).getBoundingClientRect(); return badZoomedRects = Math.abs(normal.left - fromRange.left) > 1; } // KEY NAMES var keyNames = CodeMirror.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", 106: "*", 107: "=", 109: "-", 110: ".", 111: "/", 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" }; (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 lineStartSmart(cm, pos) { var start = lineStart(cm, pos.line); var line = getLine(cm.doc, start.line); var order = getOrder(line); if (!order || order[0].level == 0) { var firstNonWS = Math.max(0, line.text.search(/\S/)); var inWS = pos.line == start.line && pos.ch <= firstNonWS && pos.ch; return Pos(start.line, inWS ? 0 : firstNonWS); } return start; } 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 = 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