phrebejk@460: // CodeMirror version 3.0
phrebejk@460: //
phrebejk@460: // CodeMirror is the only global var we claim
phrebejk@460: window.CodeMirror = (function() {
phrebejk@460:   "use strict";
phrebejk@460: 
phrebejk@460:   // BROWSER SNIFFING
phrebejk@460: 
phrebejk@460:   // Crude, but necessary to handle a number of hard-to-feature-detect
phrebejk@460:   // bugs and behavior differences.
phrebejk@460:   var gecko = /gecko\/\d/i.test(navigator.userAgent);
phrebejk@460:   var ie = /MSIE \d/.test(navigator.userAgent);
phrebejk@460:   var ie_lt8 = /MSIE [1-7]\b/.test(navigator.userAgent);
phrebejk@460:   var ie_lt9 = /MSIE [1-8]\b/.test(navigator.userAgent);
phrebejk@460:   var webkit = /WebKit\//.test(navigator.userAgent);
phrebejk@460:   var qtwebkit = webkit && /Qt\/\d+\.\d+/.test(navigator.userAgent);
phrebejk@460:   var chrome = /Chrome\//.test(navigator.userAgent);
phrebejk@460:   var opera = /Opera\//.test(navigator.userAgent);
phrebejk@460:   var safari = /Apple Computer/.test(navigator.vendor);
phrebejk@460:   var khtml = /KHTML\//.test(navigator.userAgent);
phrebejk@460:   var mac_geLion = /Mac OS X 1\d\D([7-9]|\d\d)\D/.test(navigator.userAgent);
phrebejk@460:   var mac_geMountainLion = /Mac OS X 1\d\D([8-9]|\d\d)\D/.test(navigator.userAgent);
phrebejk@460:   var phantom = /PhantomJS/.test(navigator.userAgent);
phrebejk@460: 
phrebejk@460:   var ios = /AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent);
phrebejk@460:   // This is woefully incomplete. Suggestions for alternative methods welcome.
phrebejk@460:   var mobile = ios || /Android|webOS|BlackBerry|Opera Mini|IEMobile/i.test(navigator.userAgent);
phrebejk@460:   var mac = ios || /Mac/.test(navigator.platform);
phrebejk@460: 
phrebejk@460:   // Optimize some code when these features are not used
phrebejk@460:   var sawReadOnlySpans = false, sawCollapsedSpans = false;
phrebejk@460: 
phrebejk@460:   // CONSTRUCTOR
phrebejk@460: 
phrebejk@460:   function CodeMirror(place, options) {
phrebejk@460:     if (!(this instanceof CodeMirror)) return new CodeMirror(place, options);
phrebejk@460:     
phrebejk@460:     this.options = options = options || {};
phrebejk@460:     // Determine effective options based on given values and defaults.
phrebejk@460:     for (var opt in defaults) if (!options.hasOwnProperty(opt) && defaults.hasOwnProperty(opt))
phrebejk@460:       options[opt] = defaults[opt];
phrebejk@460:     setGuttersForLineNumbers(options);
phrebejk@460: 
phrebejk@460:     var display = this.display = makeDisplay(place);
phrebejk@460:     display.wrapper.CodeMirror = this;
phrebejk@460:     updateGutters(this);
phrebejk@460:     if (options.autofocus && !mobile) focusInput(this);
phrebejk@460: 
phrebejk@460:     this.view = makeView(new BranchChunk([new LeafChunk([makeLine("", null, textHeight(display))])]));
phrebejk@460:     this.nextOpId = 0;
phrebejk@460:     loadMode(this);
phrebejk@460:     themeChanged(this);
phrebejk@460:     if (options.lineWrapping)
phrebejk@460:       this.display.wrapper.className += " CodeMirror-wrap";
phrebejk@460: 
phrebejk@460:     // Initialize the content.
phrebejk@460:     this.setValue(options.value || "");
phrebejk@460:     // Override magic textarea content restore that IE sometimes does
phrebejk@460:     // on our hidden textarea on reload
phrebejk@460:     if (ie) setTimeout(bind(resetInput, this, true), 20);
phrebejk@460:     this.view.history = makeHistory();
phrebejk@460: 
phrebejk@460:     registerEventHandlers(this);
phrebejk@460:     // IE throws unspecified error in certain cases, when
phrebejk@460:     // trying to access activeElement before onload
phrebejk@460:     var hasFocus; try { hasFocus = (document.activeElement == display.input); } catch(e) { }
phrebejk@460:     if (hasFocus || (options.autofocus && !mobile)) setTimeout(bind(onFocus, this), 20);
phrebejk@460:     else onBlur(this);
phrebejk@460: 
phrebejk@460:     operation(this, function() {
phrebejk@460:       for (var opt in optionHandlers)
phrebejk@460:         if (optionHandlers.propertyIsEnumerable(opt))
phrebejk@460:           optionHandlers[opt](this, options[opt], Init);
phrebejk@460:       for (var i = 0; i < initHooks.length; ++i) initHooks[i](this);
phrebejk@460:     })();
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // DISPLAY CONSTRUCTOR
phrebejk@460: 
phrebejk@460:   function makeDisplay(place) {
phrebejk@460:     var d = {};
phrebejk@460:     var input = d.input = elt("textarea", null, null, "position: absolute; padding: 0; width: 1px; height: 1em; outline: none;");
phrebejk@460:     input.setAttribute("wrap", "off"); input.setAttribute("autocorrect", "off"); input.setAttribute("autocapitalize", "off");
phrebejk@460:     // Wraps and hides input textarea
phrebejk@460:     d.inputDiv = elt("div", [input], null, "overflow: hidden; position: relative; width: 3px; height: 0px;");
phrebejk@460:     // The actual fake scrollbars.
phrebejk@460:     d.scrollbarH = elt("div", [elt("div", null, null, "height: 1px")], "CodeMirror-hscrollbar");
phrebejk@460:     d.scrollbarV = elt("div", [elt("div", null, null, "width: 1px")], "CodeMirror-vscrollbar");
phrebejk@460:     d.scrollbarFiller = elt("div", null, "CodeMirror-scrollbar-filler");
phrebejk@460:     // DIVs containing the selection and the actual code
phrebejk@460:     d.lineDiv = elt("div");
phrebejk@460:     d.selectionDiv = elt("div", null, null, "position: relative; z-index: 1");
phrebejk@460:     // Blinky cursor, and element used to ensure cursor fits at the end of a line
phrebejk@460:     d.cursor = elt("pre", "\u00a0", "CodeMirror-cursor");
phrebejk@460:     // Secondary cursor, shown when on a 'jump' in bi-directional text
phrebejk@460:     d.otherCursor = elt("pre", "\u00a0", "CodeMirror-cursor CodeMirror-secondarycursor");
phrebejk@460:     // Used to measure text size
phrebejk@460:     d.measure = elt("div", null, "CodeMirror-measure");
phrebejk@460:     // Wraps everything that needs to exist inside the vertically-padded coordinate system
phrebejk@460:     d.lineSpace = elt("div", [d.measure, d.selectionDiv, d.lineDiv, d.cursor, d.otherCursor],
phrebejk@460:                          null, "position: relative; outline: none");
phrebejk@460:     // Moved around its parent to cover visible view
phrebejk@460:     d.mover = elt("div", [elt("div", [d.lineSpace], "CodeMirror-lines")], null, "position: relative");
phrebejk@460:     // Set to the height of the text, causes scrolling
phrebejk@460:     d.sizer = elt("div", [d.mover], "CodeMirror-sizer");
phrebejk@460:     // D is needed because behavior of elts with overflow: auto and padding is inconsistent across browsers
phrebejk@460:     d.heightForcer = elt("div", "\u00a0", null, "position: absolute; height: " + scrollerCutOff + "px");
phrebejk@460:     // Will contain the gutters, if any
phrebejk@460:     d.gutters = elt("div", null, "CodeMirror-gutters");
phrebejk@460:     d.lineGutter = null;
phrebejk@460:     // Helper element to properly size the gutter backgrounds
phrebejk@460:     var scrollerInner = elt("div", [d.sizer, d.heightForcer, d.gutters], null, "position: relative; min-height: 100%");
phrebejk@460:     // Provides scrolling
phrebejk@460:     d.scroller = elt("div", [scrollerInner], "CodeMirror-scroll");
phrebejk@460:     d.scroller.setAttribute("tabIndex", "-1");
phrebejk@460:     // The element in which the editor lives.
phrebejk@460:     d.wrapper = elt("div", [d.inputDiv, d.scrollbarH, d.scrollbarV,
phrebejk@460:                             d.scrollbarFiller, d.scroller], "CodeMirror");
phrebejk@460:     // Work around IE7 z-index bug
phrebejk@460:     if (ie_lt8) { d.gutters.style.zIndex = -1; d.scroller.style.paddingRight = 0; }
phrebejk@460:     if (place.appendChild) place.appendChild(d.wrapper); else place(d.wrapper);
phrebejk@460: 
phrebejk@460:     // Needed to hide big blue blinking cursor on Mobile Safari
phrebejk@460:     if (ios) input.style.width = "0px";
phrebejk@460:     if (!webkit) d.scroller.draggable = true;
phrebejk@460:     // Needed to handle Tab key in KHTML
phrebejk@460:     if (khtml) { d.inputDiv.style.height = "1px"; d.inputDiv.style.position = "absolute"; }
phrebejk@460:     // Need to set a minimum width to see the scrollbar on IE7 (but must not set it on IE8).
phrebejk@460:     else if (ie_lt8) d.scrollbarH.style.minWidth = d.scrollbarV.style.minWidth = "18px";
phrebejk@460: 
phrebejk@460:     // Current visible range (may be bigger than the view window).
phrebejk@460:     d.viewOffset = d.showingFrom = d.showingTo = d.lastSizeC = 0;
phrebejk@460: 
phrebejk@460:     // Used to only resize the line number gutter when necessary (when
phrebejk@460:     // the amount of lines crosses a boundary that makes its width change)
phrebejk@460:     d.lineNumWidth = d.lineNumInnerWidth = d.lineNumChars = null;
phrebejk@460:     // See readInput and resetInput
phrebejk@460:     d.prevInput = "";
phrebejk@460:     // Set to true when a non-horizontal-scrolling widget is added. As
phrebejk@460:     // an optimization, widget aligning is skipped when d is false.
phrebejk@460:     d.alignWidgets = false;
phrebejk@460:     // Flag that indicates whether we currently expect input to appear
phrebejk@460:     // (after some event like 'keypress' or 'input') and are polling
phrebejk@460:     // intensively.
phrebejk@460:     d.pollingFast = false;
phrebejk@460:     // Self-resetting timeout for the poller
phrebejk@460:     d.poll = new Delayed();
phrebejk@460:     // True when a drag from the editor is active
phrebejk@460:     d.draggingText = false;
phrebejk@460: 
phrebejk@460:     d.cachedCharWidth = d.cachedTextHeight = null;
phrebejk@460:     d.measureLineCache = [];
phrebejk@460:     d.measureLineCachePos = 0;
phrebejk@460: 
phrebejk@460:     // Tracks when resetInput has punted to just putting a short
phrebejk@460:     // string instead of the (large) selection.
phrebejk@460:     d.inaccurateSelection = false;
phrebejk@460: 
phrebejk@460:     // Used to adjust overwrite behaviour when a paste has been
phrebejk@460:     // detected
phrebejk@460:     d.pasteIncoming = false;
phrebejk@460: 
phrebejk@460:     return d;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // VIEW CONSTRUCTOR
phrebejk@460: 
phrebejk@460:   function makeView(doc) {
phrebejk@460:     var selPos = {line: 0, ch: 0};
phrebejk@460:     return {
phrebejk@460:       doc: doc,
phrebejk@460:       // frontier is the point up to which the content has been parsed,
phrebejk@460:       frontier: 0, highlight: new Delayed(),
phrebejk@460:       sel: {from: selPos, to: selPos, head: selPos, anchor: selPos, shift: false, extend: false},
phrebejk@460:       scrollTop: 0, scrollLeft: 0,
phrebejk@460:       overwrite: false, focused: false,
phrebejk@460:       // Tracks the maximum line length so that
phrebejk@460:       // the horizontal scrollbar can be kept
phrebejk@460:       // static when scrolling.
phrebejk@460:       maxLine: getLine(doc, 0),
phrebejk@460:       maxLineLength: 0,
phrebejk@460:       maxLineChanged: false,
phrebejk@460:       suppressEdits: false,
phrebejk@460:       goalColumn: null,
phrebejk@460:       cantEdit: false,
phrebejk@460:       keyMaps: []
phrebejk@460:     };
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // STATE UPDATES
phrebejk@460: 
phrebejk@460:   // Used to get the editor into a consistent state again when options change.
phrebejk@460: 
phrebejk@460:   function loadMode(cm) {
phrebejk@460:     var doc = cm.view.doc;
phrebejk@460:     cm.view.mode = CodeMirror.getMode(cm.options, cm.options.mode);
phrebejk@460:     doc.iter(0, doc.size, function(line) { line.stateAfter = null; });
phrebejk@460:     cm.view.frontier = 0;
phrebejk@460:     startWorker(cm, 100);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function wrappingChanged(cm) {
phrebejk@460:     var doc = cm.view.doc, th = textHeight(cm.display);
phrebejk@460:     if (cm.options.lineWrapping) {
phrebejk@460:       cm.display.wrapper.className += " CodeMirror-wrap";
phrebejk@460:       var perLine = cm.display.scroller.clientWidth / charWidth(cm.display) - 3;
phrebejk@460:       doc.iter(0, doc.size, function(line) {
phrebejk@460:         if (line.height == 0) return;
phrebejk@460:         var guess = Math.ceil(line.text.length / perLine) || 1;
phrebejk@460:         if (guess != 1) updateLineHeight(line, guess * th);
phrebejk@460:       });
phrebejk@460:       cm.display.sizer.style.minWidth = "";
phrebejk@460:     } else {
phrebejk@460:       cm.display.wrapper.className = cm.display.wrapper.className.replace(" CodeMirror-wrap", "");
phrebejk@460:       computeMaxLength(cm.view);
phrebejk@460:       doc.iter(0, doc.size, function(line) {
phrebejk@460:         if (line.height != 0) updateLineHeight(line, th);
phrebejk@460:       });
phrebejk@460:     }
phrebejk@460:     regChange(cm, 0, doc.size);
phrebejk@460:     clearCaches(cm);
phrebejk@460:     setTimeout(function(){updateScrollbars(cm.display, cm.view.doc.height);}, 100);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function keyMapChanged(cm) {
phrebejk@460:     var style = keyMap[cm.options.keyMap].style;
phrebejk@460:     cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-keymap-\S+/g, "") +
phrebejk@460:       (style ? " cm-keymap-" + style : "");
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function themeChanged(cm) {
phrebejk@460:     cm.display.wrapper.className = cm.display.wrapper.className.replace(/\s*cm-s-\S+/g, "") +
phrebejk@460:       cm.options.theme.replace(/(^|\s)\s*/g, " cm-s-");
phrebejk@460:     clearCaches(cm);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function guttersChanged(cm) {
phrebejk@460:     updateGutters(cm);
phrebejk@460:     updateDisplay(cm, true);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateGutters(cm) {
phrebejk@460:     var gutters = cm.display.gutters, specs = cm.options.gutters;
phrebejk@460:     removeChildren(gutters);
phrebejk@460:     for (var i = 0; i < specs.length; ++i) {
phrebejk@460:       var gutterClass = specs[i];
phrebejk@460:       var gElt = gutters.appendChild(elt("div", null, "CodeMirror-gutter " + gutterClass));
phrebejk@460:       if (gutterClass == "CodeMirror-linenumbers") {
phrebejk@460:         cm.display.lineGutter = gElt;
phrebejk@460:         gElt.style.width = (cm.display.lineNumWidth || 1) + "px";
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     gutters.style.display = i ? "" : "none";
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineLength(doc, line) {
phrebejk@460:     if (line.height == 0) return 0;
phrebejk@460:     var len = line.text.length, merged, cur = line;
phrebejk@460:     while (merged = collapsedSpanAtStart(cur)) {
phrebejk@460:       var found = merged.find();
phrebejk@460:       cur = getLine(doc, found.from.line);
phrebejk@460:       len += found.from.ch - found.to.ch;
phrebejk@460:     }
phrebejk@460:     cur = line;
phrebejk@460:     while (merged = collapsedSpanAtEnd(cur)) {
phrebejk@460:       var found = merged.find();
phrebejk@460:       len -= cur.text.length - found.from.ch;
phrebejk@460:       cur = getLine(doc, found.to.line);
phrebejk@460:       len += cur.text.length - found.to.ch;
phrebejk@460:     }
phrebejk@460:     return len;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function computeMaxLength(view) {
phrebejk@460:     view.maxLine = getLine(view.doc, 0);
phrebejk@460:     view.maxLineLength = lineLength(view.doc, view.maxLine);
phrebejk@460:     view.maxLineChanged = true;
phrebejk@460:     view.doc.iter(1, view.doc.size, function(line) {
phrebejk@460:       var len = lineLength(view.doc, line);
phrebejk@460:       if (len > view.maxLineLength) {
phrebejk@460:         view.maxLineLength = len;
phrebejk@460:         view.maxLine = line;
phrebejk@460:       }
phrebejk@460:     });
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Make sure the gutters options contains the element
phrebejk@460:   // "CodeMirror-linenumbers" when the lineNumbers option is true.
phrebejk@460:   function setGuttersForLineNumbers(options) {
phrebejk@460:     var found = false;
phrebejk@460:     for (var i = 0; i < options.gutters.length; ++i) {
phrebejk@460:       if (options.gutters[i] == "CodeMirror-linenumbers") {
phrebejk@460:         if (options.lineNumbers) found = true;
phrebejk@460:         else options.gutters.splice(i--, 1);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (!found && options.lineNumbers)
phrebejk@460:       options.gutters.push("CodeMirror-linenumbers");
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // SCROLLBARS
phrebejk@460: 
phrebejk@460:   // Re-synchronize the fake scrollbars with the actual size of the
phrebejk@460:   // content. Optionally force a scrollTop.
phrebejk@460:   function updateScrollbars(d /* display */, docHeight) {
phrebejk@460:     var totalHeight = docHeight + 2 * paddingTop(d);
phrebejk@460:     d.sizer.style.minHeight = d.heightForcer.style.top = totalHeight + "px";
phrebejk@460:     var scrollHeight = Math.max(totalHeight, d.scroller.scrollHeight);
phrebejk@460:     var needsH = d.scroller.scrollWidth > d.scroller.clientWidth;
phrebejk@460:     var needsV = scrollHeight > d.scroller.clientHeight;
phrebejk@460:     if (needsV) {
phrebejk@460:       d.scrollbarV.style.display = "block";
phrebejk@460:       d.scrollbarV.style.bottom = needsH ? scrollbarWidth(d.measure) + "px" : "0";
phrebejk@460:       d.scrollbarV.firstChild.style.height = 
phrebejk@460:         (scrollHeight - d.scroller.clientHeight + d.scrollbarV.clientHeight) + "px";
phrebejk@460:     } else d.scrollbarV.style.display = "";
phrebejk@460:     if (needsH) {
phrebejk@460:       d.scrollbarH.style.display = "block";
phrebejk@460:       d.scrollbarH.style.right = needsV ? scrollbarWidth(d.measure) + "px" : "0";
phrebejk@460:       d.scrollbarH.firstChild.style.width =
phrebejk@460:         (d.scroller.scrollWidth - d.scroller.clientWidth + d.scrollbarH.clientWidth) + "px";
phrebejk@460:     } else d.scrollbarH.style.display = "";
phrebejk@460:     if (needsH && needsV) {
phrebejk@460:       d.scrollbarFiller.style.display = "block";
phrebejk@460:       d.scrollbarFiller.style.height = d.scrollbarFiller.style.width = scrollbarWidth(d.measure) + "px";
phrebejk@460:     } else d.scrollbarFiller.style.display = "";
phrebejk@460: 
phrebejk@460:     if (mac_geLion && scrollbarWidth(d.measure) === 0)
phrebejk@460:       d.scrollbarV.style.minWidth = d.scrollbarH.style.minHeight = mac_geMountainLion ? "18px" : "12px";
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function visibleLines(display, doc, viewPort) {
phrebejk@460:     var top = display.scroller.scrollTop, height = display.wrapper.clientHeight;
phrebejk@460:     if (typeof viewPort == "number") top = viewPort;
phrebejk@460:     else if (viewPort) {top = viewPort.top; height = viewPort.bottom - viewPort.top;}
phrebejk@460:     top = Math.floor(top - paddingTop(display));
phrebejk@460:     var bottom = Math.ceil(top + height);
phrebejk@460:     return {from: lineAtHeight(doc, top), to: lineAtHeight(doc, bottom)};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // LINE NUMBERS
phrebejk@460: 
phrebejk@460:   function alignHorizontally(cm) {
phrebejk@460:     var display = cm.display;
phrebejk@460:     if (!display.alignWidgets && !display.gutters.firstChild) return;
phrebejk@460:     var comp = compensateForHScroll(display) - display.scroller.scrollLeft + cm.view.scrollLeft;
phrebejk@460:     var gutterW = display.gutters.offsetWidth, l = comp + "px";
phrebejk@460:     for (var n = display.lineDiv.firstChild; n; n = n.nextSibling) if (n.alignable) {
phrebejk@460:       for (var i = 0, a = n.alignable; i < a.length; ++i) a[i].style.left = l;
phrebejk@460:     }
phrebejk@460:     display.gutters.style.left = (comp + gutterW) + "px";
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function maybeUpdateLineNumberWidth(cm) {
phrebejk@460:     if (!cm.options.lineNumbers) return false;
phrebejk@460:     var doc = cm.view.doc, last = lineNumberFor(cm.options, doc.size - 1), display = cm.display;
phrebejk@460:     if (last.length != display.lineNumChars) {
phrebejk@460:       var test = display.measure.appendChild(elt("div", [elt("div", last)],
phrebejk@460:                                                  "CodeMirror-linenumber CodeMirror-gutter-elt"));
phrebejk@460:       var innerW = test.firstChild.offsetWidth, padding = test.offsetWidth - innerW;
phrebejk@460:       display.lineGutter.style.width = "";
phrebejk@460:       display.lineNumInnerWidth = Math.max(innerW, display.lineGutter.offsetWidth - padding);
phrebejk@460:       display.lineNumWidth = display.lineNumInnerWidth + padding;
phrebejk@460:       display.lineNumChars = display.lineNumInnerWidth ? last.length : -1;
phrebejk@460:       display.lineGutter.style.width = display.lineNumWidth + "px";
phrebejk@460:       return true;
phrebejk@460:     }
phrebejk@460:     return false;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineNumberFor(options, i) {
phrebejk@460:     return String(options.lineNumberFormatter(i + options.firstLineNumber));
phrebejk@460:   }
phrebejk@460:   function compensateForHScroll(display) {
phrebejk@460:     return display.scroller.getBoundingClientRect().left - display.sizer.getBoundingClientRect().left;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // DISPLAY DRAWING
phrebejk@460: 
phrebejk@460:   function updateDisplay(cm, changes, viewPort) {
phrebejk@460:     var oldFrom = cm.display.showingFrom, oldTo = cm.display.showingTo;
phrebejk@460:     var updated = updateDisplayInner(cm, changes, viewPort);
phrebejk@460:     if (updated) {
phrebejk@460:       signalLater(cm, cm, "update", cm);
phrebejk@460:       if (cm.display.showingFrom != oldFrom || cm.display.showingTo != oldTo)
phrebejk@460:         signalLater(cm, cm, "viewportChange", cm, cm.display.showingFrom, cm.display.showingTo);
phrebejk@460:     }
phrebejk@460:     updateSelection(cm);
phrebejk@460:     updateScrollbars(cm.display, cm.view.doc.height);
phrebejk@460: 
phrebejk@460:     return updated;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Uses a set of changes plus the current scroll position to
phrebejk@460:   // determine which DOM updates have to be made, and makes the
phrebejk@460:   // updates.
phrebejk@460:   function updateDisplayInner(cm, changes, viewPort) {
phrebejk@460:     var display = cm.display, doc = cm.view.doc;
phrebejk@460:     if (!display.wrapper.clientWidth) {
phrebejk@460:       display.showingFrom = display.showingTo = display.viewOffset = 0;
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     // Compute the new visible window
phrebejk@460:     // If scrollTop is specified, use that to determine which lines
phrebejk@460:     // to render instead of the current scrollbar position.
phrebejk@460:     var visible = visibleLines(display, doc, viewPort);
phrebejk@460:     // Bail out if the visible area is already rendered and nothing changed.
phrebejk@460:     if (changes !== true && changes.length == 0 &&
phrebejk@460:         visible.from > display.showingFrom && visible.to < display.showingTo)
phrebejk@460:       return;
phrebejk@460: 
phrebejk@460:     if (changes && maybeUpdateLineNumberWidth(cm))
phrebejk@460:       changes = true;
phrebejk@460:     display.sizer.style.marginLeft = display.scrollbarH.style.left = display.gutters.offsetWidth + "px";
phrebejk@460: 
phrebejk@460:     // When merged lines are present, the line that needs to be
phrebejk@460:     // redrawn might not be the one that was changed.
phrebejk@460:     if (changes !== true && sawCollapsedSpans)
phrebejk@460:       for (var i = 0; i < changes.length; ++i) {
phrebejk@460:         var ch = changes[i], merged;
phrebejk@460:         while (merged = collapsedSpanAtStart(getLine(doc, ch.from))) {
phrebejk@460:           var from = merged.find().from.line;
phrebejk@460:           if (ch.diff) ch.diff -= ch.from - from;
phrebejk@460:           ch.from = from;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:     // Used to determine which lines need their line numbers updated
phrebejk@460:     var positionsChangedFrom = changes === true ? 0 : Infinity;
phrebejk@460:     if (cm.options.lineNumbers && changes && changes !== true)
phrebejk@460:       for (var i = 0; i < changes.length; ++i)
phrebejk@460:         if (changes[i].diff) { positionsChangedFrom = changes[i].from; break; }
phrebejk@460: 
phrebejk@460:     var from = Math.max(visible.from - cm.options.viewportMargin, 0);
phrebejk@460:     var to = Math.min(doc.size, visible.to + cm.options.viewportMargin);
phrebejk@460:     if (display.showingFrom < from && from - display.showingFrom < 20) from = display.showingFrom;
phrebejk@460:     if (display.showingTo > to && display.showingTo - to < 20) to = Math.min(doc.size, display.showingTo);
phrebejk@460:     if (sawCollapsedSpans) {
phrebejk@460:       from = lineNo(visualLine(doc, getLine(doc, from)));
phrebejk@460:       while (to < doc.size && lineIsHidden(getLine(doc, to))) ++to;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     // Create a range of theoretically intact lines, and punch holes
phrebejk@460:     // in that using the change info.
phrebejk@460:     var intact = changes === true ? [] :
phrebejk@460:       computeIntact([{from: display.showingFrom, to: display.showingTo}], changes);
phrebejk@460:     // Clip off the parts that won't be visible
phrebejk@460:     var intactLines = 0;
phrebejk@460:     for (var i = 0; i < intact.length; ++i) {
phrebejk@460:       var range = intact[i];
phrebejk@460:       if (range.from < from) range.from = from;
phrebejk@460:       if (range.to > to) range.to = to;
phrebejk@460:       if (range.from >= range.to) intact.splice(i--, 1);
phrebejk@460:       else intactLines += range.to - range.from;
phrebejk@460:     }
phrebejk@460:     if (intactLines == to - from && from == display.showingFrom && to == display.showingTo)
phrebejk@460:       return;
phrebejk@460:     intact.sort(function(a, b) {return a.from - b.from;});
phrebejk@460: 
phrebejk@460:     if (intactLines < (to - from) * .7) display.lineDiv.style.display = "none";
phrebejk@460:     patchDisplay(cm, from, to, intact, positionsChangedFrom);
phrebejk@460:     display.lineDiv.style.display = "";
phrebejk@460: 
phrebejk@460:     var different = from != display.showingFrom || to != display.showingTo ||
phrebejk@460:       display.lastSizeC != display.wrapper.clientHeight;
phrebejk@460:     // This is just a bogus formula that detects when the editor is
phrebejk@460:     // resized or the font size changes.
phrebejk@460:     if (different) display.lastSizeC = display.wrapper.clientHeight;
phrebejk@460:     display.showingFrom = from; display.showingTo = to;
phrebejk@460:     startWorker(cm, 100);
phrebejk@460: 
phrebejk@460:     var prevBottom = display.lineDiv.offsetTop;
phrebejk@460:     for (var node = display.lineDiv.firstChild, height; node; node = node.nextSibling) if (node.lineObj) {
phrebejk@460:       if (ie_lt8) {
phrebejk@460:         var bot = node.offsetTop + node.offsetHeight;
phrebejk@460:         height = bot - prevBottom;
phrebejk@460:         prevBottom = bot;
phrebejk@460:       } else {
phrebejk@460:         var box = node.getBoundingClientRect();
phrebejk@460:         height = box.bottom - box.top;
phrebejk@460:       }
phrebejk@460:       var diff = node.lineObj.height - height;
phrebejk@460:       if (height < 2) height = textHeight(display);
phrebejk@460:       if (diff > .001 || diff < -.001)
phrebejk@460:         updateLineHeight(node.lineObj, height);
phrebejk@460:     }
phrebejk@460:     display.viewOffset = heightAtLine(cm, getLine(doc, from));
phrebejk@460:     // Position the mover div to align with the current virtual scroll position
phrebejk@460:     display.mover.style.top = display.viewOffset + "px";
phrebejk@460:     return true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function computeIntact(intact, changes) {
phrebejk@460:     for (var i = 0, l = changes.length || 0; i < l; ++i) {
phrebejk@460:       var change = changes[i], intact2 = [], diff = change.diff || 0;
phrebejk@460:       for (var j = 0, l2 = intact.length; j < l2; ++j) {
phrebejk@460:         var range = intact[j];
phrebejk@460:         if (change.to <= range.from && change.diff) {
phrebejk@460:           intact2.push({from: range.from + diff, to: range.to + diff});
phrebejk@460:         } else if (change.to <= range.from || change.from >= range.to) {
phrebejk@460:           intact2.push(range);
phrebejk@460:         } else {
phrebejk@460:           if (change.from > range.from)
phrebejk@460:             intact2.push({from: range.from, to: change.from});
phrebejk@460:           if (change.to < range.to)
phrebejk@460:             intact2.push({from: change.to + diff, to: range.to + diff});
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       intact = intact2;
phrebejk@460:     }
phrebejk@460:     return intact;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function getDimensions(cm) {
phrebejk@460:     var d = cm.display, left = {}, width = {};
phrebejk@460:     for (var n = d.gutters.firstChild, i = 0; n; n = n.nextSibling, ++i) {
phrebejk@460:       left[cm.options.gutters[i]] = n.offsetLeft;
phrebejk@460:       width[cm.options.gutters[i]] = n.offsetWidth;
phrebejk@460:     }
phrebejk@460:     return {fixedPos: compensateForHScroll(d),
phrebejk@460:             gutterTotalWidth: d.gutters.offsetWidth,
phrebejk@460:             gutterLeft: left,
phrebejk@460:             gutterWidth: width,
phrebejk@460:             wrapperWidth: d.wrapper.clientWidth};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function patchDisplay(cm, from, to, intact, updateNumbersFrom) {
phrebejk@460:     var dims = getDimensions(cm);
phrebejk@460:     var display = cm.display, lineNumbers = cm.options.lineNumbers;
phrebejk@460:     // IE does bad things to nodes when .innerHTML = "" is used on a parent
phrebejk@460:     // we still need widgets and markers intact to add back to the new content later
phrebejk@460:     if (!intact.length && !ie && (!webkit || !cm.display.currentWheelTarget))
phrebejk@460:       removeChildren(display.lineDiv);
phrebejk@460:     var container = display.lineDiv, cur = container.firstChild;
phrebejk@460: 
phrebejk@460:     function rm(node) {
phrebejk@460:       var next = node.nextSibling;
phrebejk@460:       if (webkit && mac && cm.display.currentWheelTarget == node) {
phrebejk@460:         node.style.display = "none";
phrebejk@460:         node.lineObj = null;
phrebejk@460:       } else {
phrebejk@460:         container.removeChild(node);
phrebejk@460:       }
phrebejk@460:       return next;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var nextIntact = intact.shift(), lineNo = from;
phrebejk@460:     cm.view.doc.iter(from, to, function(line) {
phrebejk@460:       if (nextIntact && nextIntact.to == lineNo) nextIntact = intact.shift();
phrebejk@460:       if (lineIsHidden(line)) {
phrebejk@460:         if (line.height != 0) updateLineHeight(line, 0);
phrebejk@460:       } else if (nextIntact && nextIntact.from <= lineNo && nextIntact.to > lineNo) {
phrebejk@460:         // This line is intact. Skip to the actual node. Update its
phrebejk@460:         // line number if needed.
phrebejk@460:         while (cur.lineObj != line) cur = rm(cur);
phrebejk@460:         if (lineNumbers && updateNumbersFrom <= lineNo && cur.lineNumber)
phrebejk@460:           setTextContent(cur.lineNumber, lineNumberFor(cm.options, lineNo));
phrebejk@460:         cur = cur.nextSibling;
phrebejk@460:       } else {
phrebejk@460:         // This line needs to be generated.
phrebejk@460:         var lineNode = buildLineElement(cm, line, lineNo, dims);
phrebejk@460:         container.insertBefore(lineNode, cur);
phrebejk@460:         lineNode.lineObj = line;
phrebejk@460:       }
phrebejk@460:       ++lineNo;
phrebejk@460:     });
phrebejk@460:     while (cur) cur = rm(cur);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function buildLineElement(cm, line, lineNo, dims) {
phrebejk@460:     var lineElement = lineContent(cm, line);
phrebejk@460:     var markers = line.gutterMarkers, display = cm.display;
phrebejk@460: 
phrebejk@460:     if (!cm.options.lineNumbers && !markers && !line.bgClass && !line.wrapClass &&
phrebejk@460:         (!line.widgets || !line.widgets.length)) return lineElement;
phrebejk@460: 
phrebejk@460:     // Lines with gutter elements or a background class need
phrebejk@460:     // to be wrapped again, and have the extra elements added
phrebejk@460:     // to the wrapper div
phrebejk@460: 
phrebejk@460:     var wrap = elt("div", null, line.wrapClass, "position: relative");
phrebejk@460:     if (cm.options.lineNumbers || markers) {
phrebejk@460:       var gutterWrap = wrap.appendChild(elt("div", null, null, "position: absolute; left: " +
phrebejk@460:                                             dims.fixedPos + "px"));
phrebejk@460:       wrap.alignable = [gutterWrap];
phrebejk@460:       if (cm.options.lineNumbers && (!markers || !markers["CodeMirror-linenumbers"]))
phrebejk@460:         wrap.lineNumber = gutterWrap.appendChild(
phrebejk@460:           elt("div", lineNumberFor(cm.options, lineNo),
phrebejk@460:               "CodeMirror-linenumber CodeMirror-gutter-elt",
phrebejk@460:               "left: " + dims.gutterLeft["CodeMirror-linenumbers"] + "px; width: "
phrebejk@460:               + display.lineNumInnerWidth + "px"));
phrebejk@460:       if (markers)
phrebejk@460:         for (var k = 0; k < cm.options.gutters.length; ++k) {
phrebejk@460:           var id = cm.options.gutters[k], found = markers.hasOwnProperty(id) && markers[id];
phrebejk@460:           if (found)
phrebejk@460:             gutterWrap.appendChild(elt("div", [found], "CodeMirror-gutter-elt", "left: " +
phrebejk@460:                                        dims.gutterLeft[id] + "px; width: " + dims.gutterWidth[id] + "px"));
phrebejk@460:         }
phrebejk@460:     }
phrebejk@460:     // Kludge to make sure the styled element lies behind the selection (by z-index)
phrebejk@460:     if (line.bgClass)
phrebejk@460:       wrap.appendChild(elt("div", "\u00a0", line.bgClass + " CodeMirror-linebackground"));
phrebejk@460:     wrap.appendChild(lineElement);
phrebejk@460:     if (line.widgets)
phrebejk@460:       for (var i = 0, ws = line.widgets; i < ws.length; ++i) {
phrebejk@460:         var widget = ws[i], node = elt("div", [widget.node], "CodeMirror-linewidget");
phrebejk@460:         node.widget = widget;
phrebejk@460:         if (widget.noHScroll) {
phrebejk@460:           (wrap.alignable || (wrap.alignable = [])).push(node);
phrebejk@460:           var width = dims.wrapperWidth;
phrebejk@460:           node.style.left = dims.fixedPos + "px";
phrebejk@460:           if (!widget.coverGutter) {
phrebejk@460:             width -= dims.gutterTotalWidth;
phrebejk@460:             node.style.paddingLeft = dims.gutterTotalWidth + "px";
phrebejk@460:           }
phrebejk@460:           node.style.width = width + "px";
phrebejk@460:         }
phrebejk@460:         if (widget.coverGutter) {
phrebejk@460:           node.style.zIndex = 5;
phrebejk@460:           node.style.position = "relative";
phrebejk@460:           if (!widget.noHScroll) node.style.marginLeft = -dims.gutterTotalWidth + "px";
phrebejk@460:         }
phrebejk@460:         if (widget.above)
phrebejk@460:           wrap.insertBefore(node, cm.options.lineNumbers && line.height != 0 ? gutterWrap : lineElement);
phrebejk@460:         else
phrebejk@460:           wrap.appendChild(node);
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:     if (ie_lt8) wrap.style.zIndex = 2;
phrebejk@460:     return wrap;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // SELECTION / CURSOR
phrebejk@460: 
phrebejk@460:   function updateSelection(cm) {
phrebejk@460:     var display = cm.display;
phrebejk@460:     var collapsed = posEq(cm.view.sel.from, cm.view.sel.to);
phrebejk@460:     if (collapsed || cm.options.showCursorWhenSelecting)
phrebejk@460:       updateSelectionCursor(cm);
phrebejk@460:     else
phrebejk@460:       display.cursor.style.display = display.otherCursor.style.display = "none";
phrebejk@460:     if (!collapsed)
phrebejk@460:       updateSelectionRange(cm);
phrebejk@460:     else
phrebejk@460:       display.selectionDiv.style.display = "none";
phrebejk@460: 
phrebejk@460:     // Move the hidden textarea near the cursor to prevent scrolling artifacts
phrebejk@460:     var headPos = cursorCoords(cm, cm.view.sel.head, "div");
phrebejk@460:     var wrapOff = display.wrapper.getBoundingClientRect(), lineOff = display.lineDiv.getBoundingClientRect();
phrebejk@460:     display.inputDiv.style.top = Math.max(0, Math.min(display.wrapper.clientHeight - 10,
phrebejk@460:                                                       headPos.top + lineOff.top - wrapOff.top)) + "px";
phrebejk@460:     display.inputDiv.style.left = Math.max(0, Math.min(display.wrapper.clientWidth - 10,
phrebejk@460:                                                        headPos.left + lineOff.left - wrapOff.left)) + "px";
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // No selection, plain cursor
phrebejk@460:   function updateSelectionCursor(cm) {
phrebejk@460:     var display = cm.display, pos = cursorCoords(cm, cm.view.sel.head, "div");
phrebejk@460:     display.cursor.style.left = pos.left + "px";
phrebejk@460:     display.cursor.style.top = pos.top + "px";
phrebejk@460:     display.cursor.style.height = Math.max(0, pos.bottom - pos.top) * cm.options.cursorHeight + "px";
phrebejk@460:     display.cursor.style.display = "";
phrebejk@460: 
phrebejk@460:     if (pos.other) {
phrebejk@460:       display.otherCursor.style.display = "";
phrebejk@460:       display.otherCursor.style.left = pos.other.left + "px";
phrebejk@460:       display.otherCursor.style.top = pos.other.top + "px";
phrebejk@460:       display.otherCursor.style.height = (pos.other.bottom - pos.other.top) * .85 + "px";
phrebejk@460:     } else { display.otherCursor.style.display = "none"; }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Highlight selection
phrebejk@460:   function updateSelectionRange(cm) {
phrebejk@460:     var display = cm.display, doc = cm.view.doc, sel = cm.view.sel;
phrebejk@460:     var fragment = document.createDocumentFragment();
phrebejk@460:     var clientWidth = display.lineSpace.offsetWidth, pl = paddingLeft(cm.display);
phrebejk@460: 
phrebejk@460:     function add(left, top, width, bottom) {
phrebejk@460:       if (top < 0) top = 0;
phrebejk@460:       fragment.appendChild(elt("div", null, "CodeMirror-selected", "position: absolute; left: " + left +
phrebejk@460:                                "px; top: " + top + "px; width: " + (width == null ? clientWidth - left : width) +
phrebejk@460:                                "px; height: " + (bottom - top) + "px"));
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     function drawForLine(line, fromArg, toArg, retTop) {
phrebejk@460:       var lineObj = getLine(doc, line);
phrebejk@460:       var lineLen = lineObj.text.length, rVal = retTop ? Infinity : -Infinity;
phrebejk@460:       function coords(ch) {
phrebejk@460:         return charCoords(cm, {line: line, ch: ch}, "div", lineObj);
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       iterateBidiSections(getOrder(lineObj), fromArg || 0, toArg == null ? lineLen : toArg, function(from, to, dir) {
phrebejk@460:         var leftPos = coords(dir == "rtl" ? to - 1 : from);
phrebejk@460:         var rightPos = coords(dir == "rtl" ? from : to - 1);
phrebejk@460:         var left = leftPos.left, right = rightPos.right;
phrebejk@460:         if (rightPos.top - leftPos.top > 3) { // Different lines, draw top part
phrebejk@460:           add(left, leftPos.top, null, leftPos.bottom);
phrebejk@460:           left = pl;
phrebejk@460:           if (leftPos.bottom < rightPos.top) add(left, leftPos.bottom, null, rightPos.top);
phrebejk@460:         }
phrebejk@460:         if (toArg == null && to == lineLen) right = clientWidth;
phrebejk@460:         if (fromArg == null && from == 0) left = pl;
phrebejk@460:         rVal = retTop ? Math.min(rightPos.top, rVal) : Math.max(rightPos.bottom, rVal);
phrebejk@460:         if (left < pl + 1) left = pl;
phrebejk@460:         add(left, rightPos.top, right - left, rightPos.bottom);
phrebejk@460:       });
phrebejk@460:       return rVal;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     if (sel.from.line == sel.to.line) {
phrebejk@460:       drawForLine(sel.from.line, sel.from.ch, sel.to.ch);
phrebejk@460:     } else {
phrebejk@460:       var fromObj = getLine(doc, sel.from.line);
phrebejk@460:       var cur = fromObj, merged, path = [sel.from.line, sel.from.ch], singleLine;
phrebejk@460:       while (merged = collapsedSpanAtEnd(cur)) {
phrebejk@460:         var found = merged.find();
phrebejk@460:         path.push(found.from.ch, found.to.line, found.to.ch);
phrebejk@460:         if (found.to.line == sel.to.line) {
phrebejk@460:           path.push(sel.to.ch);
phrebejk@460:           singleLine = true;
phrebejk@460:           break;
phrebejk@460:         }
phrebejk@460:         cur = getLine(doc, found.to.line);
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // This is a single, merged line
phrebejk@460:       if (singleLine) {
phrebejk@460:         for (var i = 0; i < path.length; i += 3)
phrebejk@460:           drawForLine(path[i], path[i+1], path[i+2]);
phrebejk@460:       } else {
phrebejk@460:         var middleTop, middleBot, toObj = getLine(doc, sel.to.line);
phrebejk@460:         if (sel.from.ch)
phrebejk@460:           // Draw the first line of selection.
phrebejk@460:           middleTop = drawForLine(sel.from.line, sel.from.ch, null, false);
phrebejk@460:         else
phrebejk@460:           // Simply include it in the middle block.
phrebejk@460:           middleTop = heightAtLine(cm, fromObj) - display.viewOffset;
phrebejk@460: 
phrebejk@460:         if (!sel.to.ch)
phrebejk@460:           middleBot = heightAtLine(cm, toObj) - display.viewOffset;
phrebejk@460:         else
phrebejk@460:           middleBot = drawForLine(sel.to.line, collapsedSpanAtStart(toObj) ? null : 0, sel.to.ch, true);
phrebejk@460: 
phrebejk@460:         if (middleTop < middleBot) add(pl, middleTop, null, middleBot);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     removeChildrenAndAdd(display.selectionDiv, fragment);
phrebejk@460:     display.selectionDiv.style.display = "";
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Cursor-blinking
phrebejk@460:   function restartBlink(cm) {
phrebejk@460:     var display = cm.display;
phrebejk@460:     clearInterval(display.blinker);
phrebejk@460:     var on = true;
phrebejk@460:     display.cursor.style.visibility = display.otherCursor.style.visibility = "";
phrebejk@460:     display.blinker = setInterval(function() {
phrebejk@460:       if (!display.cursor.offsetHeight) return;
phrebejk@460:       display.cursor.style.visibility = display.otherCursor.style.visibility = (on = !on) ? "" : "hidden";
phrebejk@460:     }, cm.options.cursorBlinkRate);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // HIGHLIGHT WORKER
phrebejk@460: 
phrebejk@460:   function startWorker(cm, time) {
phrebejk@460:     if (cm.view.frontier < cm.display.showingTo)
phrebejk@460:       cm.view.highlight.set(time, bind(highlightWorker, cm));
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function highlightWorker(cm) {
phrebejk@460:     var view = cm.view, doc = view.doc;
phrebejk@460:     if (view.frontier >= cm.display.showingTo) return;
phrebejk@460:     var end = +new Date + cm.options.workTime;
phrebejk@460:     var state = copyState(view.mode, getStateBefore(cm, view.frontier));
phrebejk@460:     var changed = [], prevChange;
phrebejk@460:     doc.iter(view.frontier, Math.min(doc.size, cm.display.showingTo + 500), function(line) {
phrebejk@460:       if (view.frontier >= cm.display.showingFrom) { // Visible
phrebejk@460:         if (highlightLine(cm, line, state) && view.frontier >= cm.display.showingFrom) {
phrebejk@460:           if (prevChange && prevChange.end == view.frontier) prevChange.end++;
phrebejk@460:           else changed.push(prevChange = {start: view.frontier, end: view.frontier + 1});
phrebejk@460:         }
phrebejk@460:         line.stateAfter = copyState(view.mode, state);
phrebejk@460:       } else {
phrebejk@460:         processLine(cm, line, state);
phrebejk@460:         line.stateAfter = view.frontier % 5 == 0 ? copyState(view.mode, state) : null;
phrebejk@460:       }
phrebejk@460:       ++view.frontier;
phrebejk@460:       if (+new Date > end) {
phrebejk@460:         startWorker(cm, cm.options.workDelay);
phrebejk@460:         return true;
phrebejk@460:       }
phrebejk@460:     });
phrebejk@460:     if (changed.length)
phrebejk@460:       operation(cm, function() {
phrebejk@460:         for (var i = 0; i < changed.length; ++i)
phrebejk@460:           regChange(this, changed[i].start, changed[i].end);
phrebejk@460:       })();
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Finds the line to start with when starting a parse. Tries to
phrebejk@460:   // find a line with a stateAfter, so that it can start with a
phrebejk@460:   // valid state. If that fails, it returns the line with the
phrebejk@460:   // smallest indentation, which tends to need the least context to
phrebejk@460:   // parse correctly.
phrebejk@460:   function findStartLine(cm, n) {
phrebejk@460:     var minindent, minline, doc = cm.view.doc;
phrebejk@460:     for (var search = n, lim = n - 100; search > lim; --search) {
phrebejk@460:       if (search == 0) return 0;
phrebejk@460:       var line = getLine(doc, search-1);
phrebejk@460:       if (line.stateAfter) return search;
phrebejk@460:       var indented = countColumn(line.text, null, cm.options.tabSize);
phrebejk@460:       if (minline == null || minindent > indented) {
phrebejk@460:         minline = search - 1;
phrebejk@460:         minindent = indented;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return minline;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function getStateBefore(cm, n) {
phrebejk@460:     var view = cm.view;
phrebejk@460:     var pos = findStartLine(cm, n), state = pos && getLine(view.doc, pos-1).stateAfter;
phrebejk@460:     if (!state) state = startState(view.mode);
phrebejk@460:     else state = copyState(view.mode, state);
phrebejk@460:     view.doc.iter(pos, n, function(line) {
phrebejk@460:       processLine(cm, line, state);
phrebejk@460:       var save = pos == n - 1 || pos % 5 == 0 || pos >= view.showingFrom && pos < view.showingTo;
phrebejk@460:       line.stateAfter = save ? copyState(view.mode, state) : null;
phrebejk@460:       ++pos;
phrebejk@460:     });
phrebejk@460:     return state;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // POSITION MEASUREMENT
phrebejk@460:   
phrebejk@460:   function paddingTop(display) {return display.lineSpace.offsetTop;}
phrebejk@460:   function paddingLeft(display) {
phrebejk@460:     var e = removeChildrenAndAdd(display.measure, elt("pre")).appendChild(elt("span", "x"));
phrebejk@460:     return e.offsetLeft;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function measureChar(cm, line, ch, data) {
phrebejk@460:     var data = data || measureLine(cm, line), dir = -1;
phrebejk@460:     for (var pos = ch;; pos += dir) {
phrebejk@460:       var r = data[pos];
phrebejk@460:       if (r) break;
phrebejk@460:       if (dir < 0 && pos == 0) dir = 1;
phrebejk@460:     }
phrebejk@460:     return {left: pos < ch ? r.right : r.left,
phrebejk@460:             right: pos > ch ? r.left : r.right,
phrebejk@460:             top: r.top, bottom: r.bottom};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function measureLine(cm, line) {
phrebejk@460:     // First look in the cache
phrebejk@460:     var display = cm.display, cache = cm.display.measureLineCache;
phrebejk@460:     for (var i = 0; i < cache.length; ++i) {
phrebejk@460:       var memo = cache[i];
phrebejk@460:       if (memo.text == line.text && memo.markedSpans == line.markedSpans &&
phrebejk@460:           display.scroller.clientWidth == memo.width)
phrebejk@460:         return memo.measure;
phrebejk@460:     }
phrebejk@460:     
phrebejk@460:     var measure = measureLineInner(cm, line);
phrebejk@460:     // Store result in the cache
phrebejk@460:     var memo = {text: line.text, width: display.scroller.clientWidth,
phrebejk@460:                 markedSpans: line.markedSpans, measure: measure};
phrebejk@460:     if (cache.length == 16) cache[++display.measureLineCachePos % 16] = memo;
phrebejk@460:     else cache.push(memo);
phrebejk@460:     return measure;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function measureLineInner(cm, line) {
phrebejk@460:     var display = cm.display, measure = emptyArray(line.text.length);
phrebejk@460:     var pre = lineContent(cm, line, measure);
phrebejk@460: 
phrebejk@460:     // IE does not cache element positions of inline elements between
phrebejk@460:     // calls to getBoundingClientRect. This makes the loop below,
phrebejk@460:     // which gathers the positions of all the characters on the line,
phrebejk@460:     // do an amount of layout work quadratic to the number of
phrebejk@460:     // characters. When line wrapping is off, we try to improve things
phrebejk@460:     // by first subdividing the line into a bunch of inline blocks, so
phrebejk@460:     // that IE can reuse most of the layout information from caches
phrebejk@460:     // for those blocks. This does interfere with line wrapping, so it
phrebejk@460:     // doesn't work when wrapping is on, but in that case the
phrebejk@460:     // situation is slightly better, since IE does cache line-wrapping
phrebejk@460:     // information and only recomputes per-line.
phrebejk@460:     if (ie && !ie_lt8 && !cm.options.lineWrapping && pre.childNodes.length > 100) {
phrebejk@460:       var fragment = document.createDocumentFragment();
phrebejk@460:       var chunk = 10, n = pre.childNodes.length;
phrebejk@460:       for (var i = 0, chunks = Math.ceil(n / chunk); i < chunks; ++i) {
phrebejk@460:         var wrap = elt("div", null, null, "display: inline-block");
phrebejk@460:         for (var j = 0; j < chunk && n; ++j) {
phrebejk@460:           wrap.appendChild(pre.firstChild);
phrebejk@460:           --n;
phrebejk@460:         }
phrebejk@460:         fragment.appendChild(wrap);
phrebejk@460:       }
phrebejk@460:       pre.appendChild(fragment);
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     removeChildrenAndAdd(display.measure, pre);
phrebejk@460: 
phrebejk@460:     var outer = display.lineDiv.getBoundingClientRect();
phrebejk@460:     var vranges = [], data = emptyArray(line.text.length), maxBot = pre.offsetHeight;
phrebejk@460:     for (var i = 0, cur; i < measure.length; ++i) if (cur = measure[i]) {
phrebejk@460:       var size = cur.getBoundingClientRect();
phrebejk@460:       var top = Math.max(0, size.top - outer.top), bot = Math.min(size.bottom - outer.top, maxBot);
phrebejk@460:       for (var j = 0; j < vranges.length; j += 2) {
phrebejk@460:         var rtop = vranges[j], rbot = vranges[j+1];
phrebejk@460:         if (rtop > bot || rbot < top) continue;
phrebejk@460:         if (rtop <= top && rbot >= bot ||
phrebejk@460:             top <= rtop && bot >= rbot ||
phrebejk@460:             Math.min(bot, rbot) - Math.max(top, rtop) >= (bot - top) >> 1) {
phrebejk@460:           vranges[j] = Math.min(top, rtop);
phrebejk@460:           vranges[j+1] = Math.max(bot, rbot);
phrebejk@460:           break;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       if (j == vranges.length) vranges.push(top, bot);
phrebejk@460:       data[i] = {left: size.left - outer.left, right: size.right - outer.left, top: j};
phrebejk@460:     }
phrebejk@460:     for (var i = 0, cur; i < data.length; ++i) if (cur = data[i]) {
phrebejk@460:       var vr = cur.top;
phrebejk@460:       cur.top = vranges[vr]; cur.bottom = vranges[vr+1];
phrebejk@460:     }
phrebejk@460:     return data;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function clearCaches(cm) {
phrebejk@460:     cm.display.measureLineCache.length = cm.display.measureLineCachePos = 0;
phrebejk@460:     cm.display.cachedCharWidth = cm.display.cachedTextHeight = null;
phrebejk@460:     cm.view.maxLineChanged = true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Context is one of "line", "div" (display.lineDiv), "local"/null (editor), or "page"
phrebejk@460:   function intoCoordSystem(cm, lineObj, rect, context) {
phrebejk@460:     if (lineObj.widgets) for (var i = 0; i < lineObj.widgets.length; ++i) if (lineObj.widgets[i].above) {
phrebejk@460:       var size = lineObj.widgets[i].node.offsetHeight;
phrebejk@460:       rect.top += size; rect.bottom += size;
phrebejk@460:     }
phrebejk@460:     if (context == "line") return rect;
phrebejk@460:     if (!context) context = "local";
phrebejk@460:     var yOff = heightAtLine(cm, lineObj);
phrebejk@460:     if (context != "local") yOff -= cm.display.viewOffset;
phrebejk@460:     if (context == "page") {
phrebejk@460:       var lOff = cm.display.lineSpace.getBoundingClientRect();
phrebejk@460:       yOff += lOff.top + (window.pageYOffset || (document.documentElement || document.body).scrollTop);
phrebejk@460:       var xOff = lOff.left + (window.pageXOffset || (document.documentElement || document.body).scrollLeft);
phrebejk@460:       rect.left += xOff; rect.right += xOff;
phrebejk@460:     }
phrebejk@460:     rect.top += yOff; rect.bottom += yOff;
phrebejk@460:     return rect;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function charCoords(cm, pos, context, lineObj) {
phrebejk@460:     if (!lineObj) lineObj = getLine(cm.view.doc, pos.line);
phrebejk@460:     return intoCoordSystem(cm, lineObj, measureChar(cm, lineObj, pos.ch), context);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function cursorCoords(cm, pos, context, lineObj, measurement) {
phrebejk@460:     lineObj = lineObj || getLine(cm.view.doc, pos.line);
phrebejk@460:     if (!measurement) measurement = measureLine(cm, lineObj);
phrebejk@460:     function get(ch, right) {
phrebejk@460:       var m = measureChar(cm, lineObj, ch, measurement);
phrebejk@460:       if (right) m.left = m.right; else m.right = m.left;
phrebejk@460:       return intoCoordSystem(cm, lineObj, m, context);
phrebejk@460:     }
phrebejk@460:     var order = getOrder(lineObj), ch = pos.ch;
phrebejk@460:     if (!order) return get(ch);
phrebejk@460:     var main, other, linedir = order[0].level;
phrebejk@460:     for (var i = 0; i < order.length; ++i) {
phrebejk@460:       var part = order[i], rtl = part.level % 2, nb, here;
phrebejk@460:       if (part.from < ch && part.to > ch) return get(ch, rtl);
phrebejk@460:       var left = rtl ? part.to : part.from, right = rtl ? part.from : part.to;
phrebejk@460:       if (left == ch) {
phrebejk@460:         // Opera and IE return bogus offsets and widths for edges
phrebejk@460:         // where the direction flips, but only for the side with the
phrebejk@460:         // lower level. So we try to use the side with the higher
phrebejk@460:         // level.
phrebejk@460:         if (i && part.level < (nb = order[i-1]).level) here = get(nb.level % 2 ? nb.from : nb.to - 1, true);
phrebejk@460:         else here = get(rtl && part.from != part.to ? ch - 1 : ch);
phrebejk@460:         if (rtl == linedir) main = here; else other = here;
phrebejk@460:       } else if (right == ch) {
phrebejk@460:         var nb = i < order.length - 1 && order[i+1];
phrebejk@460:         if (!rtl && nb && nb.from == nb.to) continue;
phrebejk@460:         if (nb && part.level < nb.level) here = get(nb.level % 2 ? nb.to - 1 : nb.from);
phrebejk@460:         else here = get(rtl ? ch : ch - 1, true);
phrebejk@460:         if (rtl == linedir) main = here; else other = here;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (linedir && !ch) other = get(order[0].to - 1);
phrebejk@460:     if (!main) return other;
phrebejk@460:     if (other) main.other = other;
phrebejk@460:     return main;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Coords must be lineSpace-local
phrebejk@460:   function coordsChar(cm, x, y) {
phrebejk@460:     var doc = cm.view.doc;
phrebejk@460:     y += cm.display.viewOffset;
phrebejk@460:     if (y < 0) return {line: 0, ch: 0, outside: true};
phrebejk@460:     var lineNo = lineAtHeight(doc, y);
phrebejk@460:     if (lineNo >= doc.size) return {line: doc.size - 1, ch: getLine(doc, doc.size - 1).text.length};
phrebejk@460:     if (x < 0) x = 0;
phrebejk@460: 
phrebejk@460:     for (;;) {
phrebejk@460:       var lineObj = getLine(doc, lineNo);
phrebejk@460:       var found = coordsCharInner(cm, lineObj, lineNo, x, y);
phrebejk@460:       var merged = collapsedSpanAtEnd(lineObj);
phrebejk@460:       if (merged && found.ch == lineRight(lineObj))
phrebejk@460:         lineNo = merged.find().to.line;
phrebejk@460:       else
phrebejk@460:         return found;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function coordsCharInner(cm, lineObj, lineNo, x, y) {
phrebejk@460:     var innerOff = y - heightAtLine(cm, lineObj);
phrebejk@460:     var wrongLine = false, cWidth = cm.display.wrapper.clientWidth;
phrebejk@460:     var measurement = measureLine(cm, lineObj);
phrebejk@460: 
phrebejk@460:     function getX(ch) {
phrebejk@460:       var sp = cursorCoords(cm, {line: lineNo, ch: ch}, "line",
phrebejk@460:                             lineObj, measurement);
phrebejk@460:       wrongLine = true;
phrebejk@460:       if (innerOff > sp.bottom) return Math.max(0, sp.left - cWidth);
phrebejk@460:       else if (innerOff < sp.top) return sp.left + cWidth;
phrebejk@460:       else wrongLine = false;
phrebejk@460:       return sp.left;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var bidi = getOrder(lineObj), dist = lineObj.text.length;
phrebejk@460:     var from = lineLeft(lineObj), to = lineRight(lineObj);
phrebejk@460:     var fromX = paddingLeft(cm.display), toX = getX(to);
phrebejk@460: 
phrebejk@460:     if (x > toX) return {line: lineNo, ch: to, outside: wrongLine};
phrebejk@460:     // Do a binary search between these bounds.
phrebejk@460:     for (;;) {
phrebejk@460:       if (bidi ? to == from || to == moveVisually(lineObj, from, 1) : to - from <= 1) {
phrebejk@460:         var after = x - fromX < toX - x, ch = after ? from : to;
phrebejk@460:         while (isExtendingChar.test(lineObj.text.charAt(ch))) ++ch;
phrebejk@460:         return {line: lineNo, ch: ch, after: after, outside: wrongLine};
phrebejk@460:       }
phrebejk@460:       var step = Math.ceil(dist / 2), middle = from + step;
phrebejk@460:       if (bidi) {
phrebejk@460:         middle = from;
phrebejk@460:         for (var i = 0; i < step; ++i) middle = moveVisually(lineObj, middle, 1);
phrebejk@460:       }
phrebejk@460:       var middleX = getX(middle);
phrebejk@460:       if (middleX > x) {to = middle; toX = middleX; if (wrongLine) toX += 1000; dist -= step;}
phrebejk@460:       else {from = middle; fromX = middleX; dist = step;}
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var measureText;
phrebejk@460:   function textHeight(display) {
phrebejk@460:     if (display.cachedTextHeight != null) return display.cachedTextHeight;
phrebejk@460:     if (measureText == null) {
phrebejk@460:       measureText = elt("pre");
phrebejk@460:       // Measure a bunch of lines, for browsers that compute
phrebejk@460:       // fractional heights.
phrebejk@460:       for (var i = 0; i < 49; ++i) {
phrebejk@460:         measureText.appendChild(document.createTextNode("x"));
phrebejk@460:         measureText.appendChild(elt("br"));
phrebejk@460:       }
phrebejk@460:       measureText.appendChild(document.createTextNode("x"));
phrebejk@460:     }
phrebejk@460:     removeChildrenAndAdd(display.measure, measureText);
phrebejk@460:     var height = measureText.offsetHeight / 50;
phrebejk@460:     if (height > 3) display.cachedTextHeight = height;
phrebejk@460:     removeChildren(display.measure);
phrebejk@460:     return height || 1;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function charWidth(display) {
phrebejk@460:     if (display.cachedCharWidth != null) return display.cachedCharWidth;
phrebejk@460:     var anchor = elt("span", "x");
phrebejk@460:     var pre = elt("pre", [anchor]);
phrebejk@460:     removeChildrenAndAdd(display.measure, pre);
phrebejk@460:     var width = anchor.offsetWidth;
phrebejk@460:     if (width > 2) display.cachedCharWidth = width;
phrebejk@460:     return width || 10;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // OPERATIONS
phrebejk@460: 
phrebejk@460:   // Operations are used to wrap changes in such a way that each
phrebejk@460:   // change won't have to update the cursor and display (which would
phrebejk@460:   // be awkward, slow, and error-prone), but instead updates are
phrebejk@460:   // batched and then all combined and executed at once.
phrebejk@460: 
phrebejk@460:   function startOperation(cm) {
phrebejk@460:     if (cm.curOp) ++cm.curOp.depth;
phrebejk@460:     else cm.curOp = {
phrebejk@460:       // Nested operations delay update until the outermost one
phrebejk@460:       // finishes.
phrebejk@460:       depth: 1,
phrebejk@460:       // An array of ranges of lines that have to be updated. See
phrebejk@460:       // updateDisplay.
phrebejk@460:       changes: [],
phrebejk@460:       delayedCallbacks: [],
phrebejk@460:       updateInput: null,
phrebejk@460:       userSelChange: null,
phrebejk@460:       textChanged: null,
phrebejk@460:       selectionChanged: false,
phrebejk@460:       updateMaxLine: false,
phrebejk@460:       id: ++cm.nextOpId
phrebejk@460:     };
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function endOperation(cm) {
phrebejk@460:     var op = cm.curOp;
phrebejk@460:     if (--op.depth) return;
phrebejk@460:     cm.curOp = null;
phrebejk@460:     var view = cm.view, display = cm.display;
phrebejk@460:     if (op.updateMaxLine) computeMaxLength(view);
phrebejk@460:     if (view.maxLineChanged && !cm.options.lineWrapping) {
phrebejk@460:       var width = measureChar(cm, view.maxLine, view.maxLine.text.length).right;
phrebejk@460:       display.sizer.style.minWidth = (width + 3 + scrollerCutOff) + "px";
phrebejk@460:       view.maxLineChanged = false;
phrebejk@460:     }
phrebejk@460:     var newScrollPos, updated;
phrebejk@460:     if (op.selectionChanged) {
phrebejk@460:       var coords = cursorCoords(cm, view.sel.head);
phrebejk@460:       newScrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
phrebejk@460:     }
phrebejk@460:     if (op.changes.length || newScrollPos && newScrollPos.scrollTop != null)
phrebejk@460:       updated = updateDisplay(cm, op.changes, newScrollPos && newScrollPos.scrollTop);
phrebejk@460:     if (!updated && op.selectionChanged) updateSelection(cm);
phrebejk@460:     if (newScrollPos) scrollCursorIntoView(cm);
phrebejk@460:     if (op.selectionChanged) restartBlink(cm);
phrebejk@460: 
phrebejk@460:     if (view.focused && op.updateInput)
phrebejk@460:       resetInput(cm, op.userSelChange);
phrebejk@460: 
phrebejk@460:     if (op.textChanged)
phrebejk@460:       signal(cm, "change", cm, op.textChanged);
phrebejk@460:     if (op.selectionChanged) signal(cm, "cursorActivity", cm);
phrebejk@460:     for (var i = 0; i < op.delayedCallbacks.length; ++i) op.delayedCallbacks[i](cm);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Wraps a function in an operation. Returns the wrapped function.
phrebejk@460:   function operation(cm1, f) {
phrebejk@460:     return function() {
phrebejk@460:       var cm = cm1 || this;
phrebejk@460:       startOperation(cm);
phrebejk@460:       try {var result = f.apply(cm, arguments);}
phrebejk@460:       finally {endOperation(cm);}
phrebejk@460:       return result;
phrebejk@460:     };
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function regChange(cm, from, to, lendiff) {
phrebejk@460:     cm.curOp.changes.push({from: from, to: to, diff: lendiff});
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // INPUT HANDLING
phrebejk@460: 
phrebejk@460:   function slowPoll(cm) {
phrebejk@460:     if (cm.view.pollingFast) return;
phrebejk@460:     cm.display.poll.set(cm.options.pollInterval, function() {
phrebejk@460:       readInput(cm);
phrebejk@460:       if (cm.view.focused) slowPoll(cm);
phrebejk@460:     });
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function fastPoll(cm) {
phrebejk@460:     var missed = false;
phrebejk@460:     cm.display.pollingFast = true;
phrebejk@460:     function p() {
phrebejk@460:       var changed = readInput(cm);
phrebejk@460:       if (!changed && !missed) {missed = true; cm.display.poll.set(60, p);}
phrebejk@460:       else {cm.display.pollingFast = false; slowPoll(cm);}
phrebejk@460:     }
phrebejk@460:     cm.display.poll.set(20, p);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // prevInput is a hack to work with IME. If we reset the textarea
phrebejk@460:   // on every change, that breaks IME. So we look for changes
phrebejk@460:   // compared to the previous content instead. (Modern browsers have
phrebejk@460:   // events that indicate IME taking place, but these are not widely
phrebejk@460:   // supported or compatible enough yet to rely on.)
phrebejk@460:   function readInput(cm) {
phrebejk@460:     var input = cm.display.input, prevInput = cm.display.prevInput, view = cm.view, sel = view.sel;
phrebejk@460:     if (!view.focused || hasSelection(input) || isReadOnly(cm)) return false;
phrebejk@460:     var text = input.value;
phrebejk@460:     if (text == prevInput && posEq(sel.from, sel.to)) return false;
phrebejk@460:     startOperation(cm);
phrebejk@460:     view.sel.shift = false;
phrebejk@460:     var same = 0, l = Math.min(prevInput.length, text.length);
phrebejk@460:     while (same < l && prevInput[same] == text[same]) ++same;
phrebejk@460:     var from = sel.from, to = sel.to;
phrebejk@460:     if (same < prevInput.length)
phrebejk@460:       from = {line: from.line, ch: from.ch - (prevInput.length - same)};
phrebejk@460:     else if (view.overwrite && posEq(from, to) && !cm.display.pasteIncoming)
phrebejk@460:       to = {line: to.line, ch: Math.min(getLine(cm.view.doc, to.line).text.length, to.ch + (text.length - same))};
phrebejk@460:     var updateInput = cm.curOp.updateInput;
phrebejk@460:     updateDoc(cm, from, to, splitLines(text.slice(same)), "end",
phrebejk@460:               cm.display.pasteIncoming ? "paste" : "input", {from: from, to: to});
phrebejk@460:     cm.curOp.updateInput = updateInput;
phrebejk@460:     if (text.length > 1000) input.value = cm.display.prevInput = "";
phrebejk@460:     else cm.display.prevInput = text;
phrebejk@460:     endOperation(cm);
phrebejk@460:     cm.display.pasteIncoming = false;
phrebejk@460:     return true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function resetInput(cm, user) {
phrebejk@460:     var view = cm.view, minimal, selected;
phrebejk@460:     if (!posEq(view.sel.from, view.sel.to)) {
phrebejk@460:       cm.display.prevInput = "";
phrebejk@460:       minimal = hasCopyEvent &&
phrebejk@460:         (view.sel.to.line - view.sel.from.line > 100 || (selected = cm.getSelection()).length > 1000);
phrebejk@460:       if (minimal) cm.display.input.value = "-";
phrebejk@460:       else cm.display.input.value = selected || cm.getSelection();
phrebejk@460:       if (view.focused) selectInput(cm.display.input);
phrebejk@460:     } else if (user) cm.display.prevInput = cm.display.input.value = "";
phrebejk@460:     cm.display.inaccurateSelection = minimal;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function focusInput(cm) {
phrebejk@460:     if (cm.options.readOnly != "nocursor" && (ie || document.activeElement != cm.display.input))
phrebejk@460:       cm.display.input.focus();
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function isReadOnly(cm) {
phrebejk@460:     return cm.options.readOnly || cm.view.cantEdit;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // EVENT HANDLERS
phrebejk@460: 
phrebejk@460:   function registerEventHandlers(cm) {
phrebejk@460:     var d = cm.display;
phrebejk@460:     on(d.scroller, "mousedown", operation(cm, onMouseDown));
phrebejk@460:     on(d.scroller, "dblclick", operation(cm, e_preventDefault));
phrebejk@460:     on(d.lineSpace, "selectstart", function(e) {
phrebejk@460:       if (!mouseEventInWidget(d, e)) e_preventDefault(e);
phrebejk@460:     });
phrebejk@460:     // Gecko browsers fire contextmenu *after* opening the menu, at
phrebejk@460:     // which point we can't mess with it anymore. Context menu is
phrebejk@460:     // handled in onMouseDown for Gecko.
phrebejk@460:     if (!gecko) on(d.scroller, "contextmenu", function(e) {onContextMenu(cm, e);});
phrebejk@460: 
phrebejk@460:     on(d.scroller, "scroll", function() {
phrebejk@460:       setScrollTop(cm, d.scroller.scrollTop);
phrebejk@460:       setScrollLeft(cm, d.scroller.scrollLeft, true);
phrebejk@460:       signal(cm, "scroll", cm);
phrebejk@460:     });
phrebejk@460:     on(d.scrollbarV, "scroll", function() {
phrebejk@460:       setScrollTop(cm, d.scrollbarV.scrollTop);
phrebejk@460:     });
phrebejk@460:     on(d.scrollbarH, "scroll", function() {
phrebejk@460:       setScrollLeft(cm, d.scrollbarH.scrollLeft);
phrebejk@460:     });
phrebejk@460: 
phrebejk@460:     on(d.scroller, "mousewheel", function(e){onScrollWheel(cm, e);});
phrebejk@460:     on(d.scroller, "DOMMouseScroll", function(e){onScrollWheel(cm, e);});
phrebejk@460: 
phrebejk@460:     function reFocus() { if (cm.view.focused) setTimeout(bind(focusInput, cm), 0); }
phrebejk@460:     on(d.scrollbarH, "mousedown", reFocus);
phrebejk@460:     on(d.scrollbarV, "mousedown", reFocus);
phrebejk@460:     // Prevent wrapper from ever scrolling
phrebejk@460:     on(d.wrapper, "scroll", function() { d.wrapper.scrollTop = d.wrapper.scrollLeft = 0; });
phrebejk@460:     on(window, "resize", function resizeHandler() {
phrebejk@460:       // Might be a text scaling operation, clear size caches.
phrebejk@460:       d.cachedCharWidth = d.cachedTextHeight = null;
phrebejk@460:       clearCaches(cm);
phrebejk@460:       if (d.wrapper.parentNode) updateDisplay(cm, true);
phrebejk@460:       else off(window, "resize", resizeHandler);
phrebejk@460:     });
phrebejk@460: 
phrebejk@460:     on(d.input, "keyup", operation(cm, function(e) {
phrebejk@460:       if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
phrebejk@460:       if (e_prop(e, "keyCode") == 16) cm.view.sel.shift = false;
phrebejk@460:     }));
phrebejk@460:     on(d.input, "input", bind(fastPoll, cm));
phrebejk@460:     on(d.input, "keydown", operation(cm, onKeyDown));
phrebejk@460:     on(d.input, "keypress", operation(cm, onKeyPress));
phrebejk@460:     on(d.input, "focus", bind(onFocus, cm));
phrebejk@460:     on(d.input, "blur", bind(onBlur, cm));
phrebejk@460: 
phrebejk@460:     function drag_(e) {
phrebejk@460:       if (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return;
phrebejk@460:       e_stop(e);
phrebejk@460:     }
phrebejk@460:     if (cm.options.dragDrop) {
phrebejk@460:       on(d.scroller, "dragstart", function(e){onDragStart(cm, e);});
phrebejk@460:       on(d.scroller, "dragenter", drag_);
phrebejk@460:       on(d.scroller, "dragover", drag_);
phrebejk@460:       on(d.scroller, "drop", operation(cm, onDrop));
phrebejk@460:     }
phrebejk@460:     on(d.scroller, "paste", function(){focusInput(cm); fastPoll(cm);});
phrebejk@460:     on(d.input, "paste", function() {
phrebejk@460:       d.pasteIncoming = true;
phrebejk@460:       fastPoll(cm);
phrebejk@460:     });
phrebejk@460: 
phrebejk@460:     function prepareCopy() {
phrebejk@460:       if (d.inaccurateSelection) {
phrebejk@460:         d.prevInput = "";
phrebejk@460:         d.inaccurateSelection = false;
phrebejk@460:         d.input.value = cm.getSelection();
phrebejk@460:         selectInput(d.input);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     on(d.input, "cut", prepareCopy);
phrebejk@460:     on(d.input, "copy", prepareCopy);
phrebejk@460: 
phrebejk@460:     // Needed to handle Tab key in KHTML
phrebejk@460:     if (khtml) on(d.sizer, "mouseup", function() {
phrebejk@460:         if (document.activeElement == d.input) d.input.blur();
phrebejk@460:         focusInput(cm);
phrebejk@460:     });
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function mouseEventInWidget(display, e) {
phrebejk@460:     for (var n = e_target(e); n != display.wrapper; n = n.parentNode)
phrebejk@460:       if (/\bCodeMirror-(?:line)?widget\b/.test(n.className) ||
phrebejk@460:           n.parentNode == display.sizer && n != display.mover) return true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function posFromMouse(cm, e, liberal) {
phrebejk@460:     var display = cm.display;
phrebejk@460:     if (!liberal) {
phrebejk@460:       var target = e_target(e);
phrebejk@460:       if (target == display.scrollbarH || target == display.scrollbarH.firstChild ||
phrebejk@460:           target == display.scrollbarV || target == display.scrollbarV.firstChild ||
phrebejk@460:           target == display.scrollbarFiller) return null;
phrebejk@460:     }
phrebejk@460:     var x, y, space = display.lineSpace.getBoundingClientRect();
phrebejk@460:     // Fails unpredictably on IE[67] when mouse is dragged around quickly.
phrebejk@460:     try { x = e.clientX; y = e.clientY; } catch (e) { return null; }
phrebejk@460:     return coordsChar(cm, x - space.left, y - space.top);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var lastClick, lastDoubleClick;
phrebejk@460:   function onMouseDown(e) {
phrebejk@460:     var cm = this, display = cm.display, view = cm.view, sel = view.sel, doc = view.doc;
phrebejk@460:     sel.shift = e_prop(e, "shiftKey");
phrebejk@460: 
phrebejk@460:     if (mouseEventInWidget(display, e)) {
phrebejk@460:       if (!webkit) {
phrebejk@460:         display.scroller.draggable = false;
phrebejk@460:         setTimeout(function(){display.scroller.draggable = true;}, 100);
phrebejk@460:       }
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460:     if (clickInGutter(cm, e)) return;
phrebejk@460:     var start = posFromMouse(cm, e);
phrebejk@460: 
phrebejk@460:     switch (e_button(e)) {
phrebejk@460:     case 3:
phrebejk@460:       if (gecko) onContextMenu.call(cm, cm, e);
phrebejk@460:       return;
phrebejk@460:     case 2:
phrebejk@460:       if (start) extendSelection(cm, start);
phrebejk@460:       setTimeout(bind(focusInput, cm), 20);
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460:     // For button 1, if it was clicked inside the editor
phrebejk@460:     // (posFromMouse returning non-null), we have to adjust the
phrebejk@460:     // selection.
phrebejk@460:     if (!start) {if (e_target(e) == display.scroller) e_preventDefault(e); return;}
phrebejk@460: 
phrebejk@460:     if (!view.focused) onFocus(cm);
phrebejk@460: 
phrebejk@460:     var now = +new Date, type = "single";
phrebejk@460:     if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {
phrebejk@460:       type = "triple";
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       setTimeout(bind(focusInput, cm), 20);
phrebejk@460:       selectLine(cm, start.line);
phrebejk@460:     } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {
phrebejk@460:       type = "double";
phrebejk@460:       lastDoubleClick = {time: now, pos: start};
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       var word = findWordAt(getLine(doc, start.line).text, start);
phrebejk@460:       extendSelection(cm, word.from, word.to);
phrebejk@460:     } else { lastClick = {time: now, pos: start}; }
phrebejk@460: 
phrebejk@460:     var last = start;
phrebejk@460:     if (cm.options.dragDrop && dragAndDrop && !isReadOnly(cm) && !posEq(sel.from, sel.to) &&
phrebejk@460:         !posLess(start, sel.from) && !posLess(sel.to, start) && type == "single") {
phrebejk@460:       var dragEnd = operation(cm, function(e2) {
phrebejk@460:         if (webkit) display.scroller.draggable = false;
phrebejk@460:         view.draggingText = false;
phrebejk@460:         off(document, "mouseup", dragEnd);
phrebejk@460:         off(display.scroller, "drop", dragEnd);
phrebejk@460:         if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {
phrebejk@460:           e_preventDefault(e2);
phrebejk@460:           extendSelection(cm, start);
phrebejk@460:           focusInput(cm);
phrebejk@460:         }
phrebejk@460:       });
phrebejk@460:       // Let the drag handler handle this.
phrebejk@460:       if (webkit) display.scroller.draggable = true;
phrebejk@460:       view.draggingText = dragEnd;
phrebejk@460:       // IE's approach to draggable
phrebejk@460:       if (display.scroller.dragDrop) display.scroller.dragDrop();
phrebejk@460:       on(document, "mouseup", dragEnd);
phrebejk@460:       on(display.scroller, "drop", dragEnd);
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460:     e_preventDefault(e);
phrebejk@460:     if (type == "single") extendSelection(cm, clipPos(doc, start));
phrebejk@460: 
phrebejk@460:     var startstart = sel.from, startend = sel.to;
phrebejk@460: 
phrebejk@460:     function doSelect(cur) {
phrebejk@460:       if (type == "single") {
phrebejk@460:         extendSelection(cm, clipPos(doc, start), cur);
phrebejk@460:         return;
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       startstart = clipPos(doc, startstart);
phrebejk@460:       startend = clipPos(doc, startend);
phrebejk@460:       if (type == "double") {
phrebejk@460:         var word = findWordAt(getLine(doc, cur.line).text, cur);
phrebejk@460:         if (posLess(cur, startstart)) extendSelection(cm, word.from, startend);
phrebejk@460:         else extendSelection(cm, startstart, word.to);
phrebejk@460:       } else if (type == "triple") {
phrebejk@460:         if (posLess(cur, startstart)) extendSelection(cm, startend, clipPos(doc, {line: cur.line, ch: 0}));
phrebejk@460:         else extendSelection(cm, startstart, clipPos(doc, {line: cur.line + 1, ch: 0}));
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var editorSize = display.wrapper.getBoundingClientRect();
phrebejk@460:     // Used to ensure timeout re-tries don't fire when another extend
phrebejk@460:     // happened in the meantime (clearTimeout isn't reliable -- at
phrebejk@460:     // least on Chrome, the timeouts still happen even when cleared,
phrebejk@460:     // if the clear happens after their scheduled firing time).
phrebejk@460:     var counter = 0;
phrebejk@460: 
phrebejk@460:     function extend(e) {
phrebejk@460:       var curCount = ++counter;
phrebejk@460:       var cur = posFromMouse(cm, e, true);
phrebejk@460:       if (!cur) return;
phrebejk@460:       if (!posEq(cur, last)) {
phrebejk@460:         if (!view.focused) onFocus(cm);
phrebejk@460:         last = cur;
phrebejk@460:         doSelect(cur);
phrebejk@460:         var visible = visibleLines(display, doc);
phrebejk@460:         if (cur.line >= visible.to || cur.line < visible.from)
phrebejk@460:           setTimeout(operation(cm, function(){if (counter == curCount) extend(e);}), 150);
phrebejk@460:       } else {
phrebejk@460:         var outside = e.clientY < editorSize.top ? -20 : e.clientY > editorSize.bottom ? 20 : 0;
phrebejk@460:         if (outside) setTimeout(operation(cm, function() {
phrebejk@460:           if (counter != curCount) return;
phrebejk@460:           display.scroller.scrollTop += outside;
phrebejk@460:           extend(e);
phrebejk@460:         }), 50);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     function done(e) {
phrebejk@460:       counter = Infinity;
phrebejk@460:       var cur = posFromMouse(cm, e);
phrebejk@460:       if (cur) doSelect(cur);
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       focusInput(cm);
phrebejk@460:       off(document, "mousemove", move);
phrebejk@460:       off(document, "mouseup", up);
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var move = operation(cm, function(e) {
phrebejk@460:       if (!ie && !e_button(e)) done(e);
phrebejk@460:       else extend(e);
phrebejk@460:     });
phrebejk@460:     var up = operation(cm, done);
phrebejk@460:     on(document, "mousemove", move);
phrebejk@460:     on(document, "mouseup", up);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function onDrop(e) {
phrebejk@460:     var cm = this;
phrebejk@460:     if (cm.options.onDragEvent && cm.options.onDragEvent(cm, addStop(e))) return;
phrebejk@460:     e_preventDefault(e);
phrebejk@460:     var pos = posFromMouse(cm, e, true), files = e.dataTransfer.files;
phrebejk@460:     if (!pos || isReadOnly(cm)) return;
phrebejk@460:     if (files && files.length && window.FileReader && window.File) {
phrebejk@460:       var n = files.length, text = Array(n), read = 0;
phrebejk@460:       var loadFile = function(file, i) {
phrebejk@460:         var reader = new FileReader;
phrebejk@460:         reader.onload = function() {
phrebejk@460:           text[i] = reader.result;
phrebejk@460:           if (++read == n) {
phrebejk@460:             pos = clipPos(cm.view.doc, pos);
phrebejk@460:             operation(cm, function() {
phrebejk@460:               var end = replaceRange(cm, text.join(""), pos, pos, "paste");
phrebejk@460:               setSelection(cm, pos, end);
phrebejk@460:             })();
phrebejk@460:           }
phrebejk@460:         };
phrebejk@460:         reader.readAsText(file);
phrebejk@460:       };
phrebejk@460:       for (var i = 0; i < n; ++i) loadFile(files[i], i);
phrebejk@460:     } else {
phrebejk@460:       // Don't do a replace if the drop happened inside of the selected text.
phrebejk@460:       if (cm.view.draggingText && !(posLess(pos, cm.view.sel.from) || posLess(cm.view.sel.to, pos))) {
phrebejk@460:         cm.view.draggingText(e);
phrebejk@460:         if (ie) setTimeout(bind(focusInput, cm), 50);
phrebejk@460:         return;
phrebejk@460:       }
phrebejk@460:       try {
phrebejk@460:         var text = e.dataTransfer.getData("Text");
phrebejk@460:         if (text) {
phrebejk@460:           var curFrom = cm.view.sel.from, curTo = cm.view.sel.to;
phrebejk@460:           setSelection(cm, pos, pos);
phrebejk@460:           if (cm.view.draggingText) replaceRange(cm, "", curFrom, curTo, "paste");
phrebejk@460:           cm.replaceSelection(text, null, "paste");
phrebejk@460:           focusInput(cm);
phrebejk@460:           onFocus(cm);
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       catch(e){}
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function clickInGutter(cm, e) {
phrebejk@460:     var display = cm.display;
phrebejk@460:     try { var mX = e.clientX, mY = e.clientY; }
phrebejk@460:     catch(e) { return false; }
phrebejk@460: 
phrebejk@460:     if (mX >= Math.floor(display.gutters.getBoundingClientRect().right)) return false;
phrebejk@460:     e_preventDefault(e);
phrebejk@460:     if (!hasHandler(cm, "gutterClick")) return true;
phrebejk@460: 
phrebejk@460:     var lineBox = display.lineDiv.getBoundingClientRect();
phrebejk@460:     if (mY > lineBox.bottom) return true;
phrebejk@460:     mY -= lineBox.top - display.viewOffset;
phrebejk@460: 
phrebejk@460:     for (var i = 0; i < cm.options.gutters.length; ++i) {
phrebejk@460:       var g = display.gutters.childNodes[i];
phrebejk@460:       if (g && g.getBoundingClientRect().right >= mX) {
phrebejk@460:         var line = lineAtHeight(cm.view.doc, mY);
phrebejk@460:         var gutter = cm.options.gutters[i];
phrebejk@460:         signalLater(cm, cm, "gutterClick", cm, line, gutter, e);
phrebejk@460:         break;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function onDragStart(cm, e) {
phrebejk@460:     var txt = cm.getSelection();
phrebejk@460:     e.dataTransfer.setData("Text", txt);
phrebejk@460: 
phrebejk@460:     // Use dummy image instead of default browsers image.
phrebejk@460:     // Recent Safari (~6.0.2) have a tendency to segfault when this happens, so we don't do it there.
phrebejk@460:     if (e.dataTransfer.setDragImage && !safari)
phrebejk@460:       e.dataTransfer.setDragImage(elt('img'), 0, 0);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function setScrollTop(cm, val) {
phrebejk@460:     if (Math.abs(cm.view.scrollTop - val) < 2) return;
phrebejk@460:     cm.view.scrollTop = val;
phrebejk@460:     if (!gecko) updateDisplay(cm, [], val);
phrebejk@460:     if (cm.display.scroller.scrollTop != val) cm.display.scroller.scrollTop = val;
phrebejk@460:     if (cm.display.scrollbarV.scrollTop != val) cm.display.scrollbarV.scrollTop = val;
phrebejk@460:     if (gecko) updateDisplay(cm, []);
phrebejk@460:   }
phrebejk@460:   function setScrollLeft(cm, val, isScroller) {
phrebejk@460:     if (isScroller ? val == cm.view.scrollLeft : Math.abs(cm.view.scrollLeft - val) < 2) return;
phrebejk@460:     cm.view.scrollLeft = val;
phrebejk@460:     alignHorizontally(cm);
phrebejk@460:     if (cm.display.scroller.scrollLeft != val) cm.display.scroller.scrollLeft = val;
phrebejk@460:     if (cm.display.scrollbarH.scrollLeft != val) cm.display.scrollbarH.scrollLeft = val;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Since the delta values reported on mouse wheel events are
phrebejk@460:   // unstandardized between browsers and even browser versions, and
phrebejk@460:   // generally horribly unpredictable, this code starts by measuring
phrebejk@460:   // the scroll effect that the first few mouse wheel events have,
phrebejk@460:   // and, from that, detects the way it can convert deltas to pixel
phrebejk@460:   // offsets afterwards.
phrebejk@460:   //
phrebejk@460:   // The reason we want to know the amount a wheel event will scroll
phrebejk@460:   // is that it gives us a chance to update the display before the
phrebejk@460:   // actual scrolling happens, reducing flickering.
phrebejk@460: 
phrebejk@460:   var wheelSamples = 0, wheelDX, wheelDY, wheelStartX, wheelStartY, wheelPixelsPerUnit = null;
phrebejk@460:   // Fill in a browser-detected starting value on browsers where we
phrebejk@460:   // know one. These don't have to be accurate -- the result of them
phrebejk@460:   // being wrong would just be a slight flicker on the first wheel
phrebejk@460:   // scroll (if it is large enough).
phrebejk@460:   if (ie) wheelPixelsPerUnit = -.53;
phrebejk@460:   else if (gecko) wheelPixelsPerUnit = 15;
phrebejk@460:   else if (chrome) wheelPixelsPerUnit = -.7;
phrebejk@460:   else if (safari) wheelPixelsPerUnit = -1/3;
phrebejk@460: 
phrebejk@460:   function onScrollWheel(cm, e) {
phrebejk@460:     var dx = e.wheelDeltaX, dy = e.wheelDeltaY;
phrebejk@460:     if (dx == null && e.detail && e.axis == e.HORIZONTAL_AXIS) dx = e.detail;
phrebejk@460:     if (dy == null && e.detail && e.axis == e.VERTICAL_AXIS) dy = e.detail;
phrebejk@460:     else if (dy == null) dy = e.wheelDelta;
phrebejk@460: 
phrebejk@460:     // Webkit browsers on OS X abort momentum scrolls when the target
phrebejk@460:     // of the scroll event is removed from the scrollable element.
phrebejk@460:     // This hack (see related code in patchDisplay) makes sure the
phrebejk@460:     // element is kept around.
phrebejk@460:     if (dy && mac && webkit) {
phrebejk@460:       for (var cur = e.target; cur != scroll; cur = cur.parentNode) {
phrebejk@460:         if (cur.lineObj) {
phrebejk@460:           cm.display.currentWheelTarget = cur;
phrebejk@460:           break;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var scroll = cm.display.scroller;
phrebejk@460:     // On some browsers, horizontal scrolling will cause redraws to
phrebejk@460:     // happen before the gutter has been realigned, causing it to
phrebejk@460:     // wriggle around in a most unseemly way. When we have an
phrebejk@460:     // estimated pixels/delta value, we just handle horizontal
phrebejk@460:     // scrolling entirely here. It'll be slightly off from native, but
phrebejk@460:     // better than glitching out.
phrebejk@460:     if (dx && !gecko && !opera && wheelPixelsPerUnit != null) {
phrebejk@460:       if (dy)
phrebejk@460:         setScrollTop(cm, Math.max(0, Math.min(scroll.scrollTop + dy * wheelPixelsPerUnit, scroll.scrollHeight - scroll.clientHeight)));
phrebejk@460:       setScrollLeft(cm, Math.max(0, Math.min(scroll.scrollLeft + dx * wheelPixelsPerUnit, scroll.scrollWidth - scroll.clientWidth)));
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       wheelStartX = null; // Abort measurement, if in progress
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     if (dy && wheelPixelsPerUnit != null) {
phrebejk@460:       var pixels = dy * wheelPixelsPerUnit;
phrebejk@460:       var top = cm.view.scrollTop, bot = top + cm.display.wrapper.clientHeight;
phrebejk@460:       if (pixels < 0) top = Math.max(0, top + pixels - 50);
phrebejk@460:       else bot = Math.min(cm.view.doc.height, bot + pixels + 50);
phrebejk@460:       updateDisplay(cm, [], {top: top, bottom: bot});
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     if (wheelSamples < 20) {
phrebejk@460:       if (wheelStartX == null) {
phrebejk@460:         wheelStartX = scroll.scrollLeft; wheelStartY = scroll.scrollTop;
phrebejk@460:         wheelDX = dx; wheelDY = dy;
phrebejk@460:         setTimeout(function() {
phrebejk@460:           if (wheelStartX == null) return;
phrebejk@460:           var movedX = scroll.scrollLeft - wheelStartX;
phrebejk@460:           var movedY = scroll.scrollTop - wheelStartY;
phrebejk@460:           var sample = (movedY && wheelDY && movedY / wheelDY) ||
phrebejk@460:             (movedX && wheelDX && movedX / wheelDX);
phrebejk@460:           wheelStartX = wheelStartY = null;
phrebejk@460:           if (!sample) return;
phrebejk@460:           wheelPixelsPerUnit = (wheelPixelsPerUnit * wheelSamples + sample) / (wheelSamples + 1);
phrebejk@460:           ++wheelSamples;
phrebejk@460:         }, 200);
phrebejk@460:       } else {
phrebejk@460:         wheelDX += dx; wheelDY += dy;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function doHandleBinding(cm, bound, dropShift) {
phrebejk@460:     if (typeof bound == "string") {
phrebejk@460:       bound = commands[bound];
phrebejk@460:       if (!bound) return false;
phrebejk@460:     }
phrebejk@460:     // Ensure previous input has been read, so that the handler sees a
phrebejk@460:     // consistent view of the document
phrebejk@460:     if (cm.display.pollingFast && readInput(cm)) cm.display.pollingFast = false;
phrebejk@460:     var view = cm.view, prevShift = view.sel.shift;
phrebejk@460:     try {
phrebejk@460:       if (isReadOnly(cm)) view.suppressEdits = true;
phrebejk@460:       if (dropShift) view.sel.shift = false;
phrebejk@460:       bound(cm);
phrebejk@460:     } catch(e) {
phrebejk@460:       if (e != Pass) throw e;
phrebejk@460:       return false;
phrebejk@460:     } finally {
phrebejk@460:       view.sel.shift = prevShift;
phrebejk@460:       view.suppressEdits = false;
phrebejk@460:     }
phrebejk@460:     return true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function allKeyMaps(cm) {
phrebejk@460:     var maps = cm.view.keyMaps.slice(0);
phrebejk@460:     maps.push(cm.options.keyMap);
phrebejk@460:     if (cm.options.extraKeys) maps.unshift(cm.options.extraKeys);
phrebejk@460:     return maps;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var maybeTransition;
phrebejk@460:   function handleKeyBinding(cm, e) {
phrebejk@460:     // Handle auto keymap transitions
phrebejk@460:     var startMap = getKeyMap(cm.options.keyMap), next = startMap.auto;
phrebejk@460:     clearTimeout(maybeTransition);
phrebejk@460:     if (next && !isModifierKey(e)) maybeTransition = setTimeout(function() {
phrebejk@460:       if (getKeyMap(cm.options.keyMap) == startMap)
phrebejk@460:         cm.options.keyMap = (next.call ? next.call(null, cm) : next);
phrebejk@460:     }, 50);
phrebejk@460: 
phrebejk@460:     var name = keyNames[e_prop(e, "keyCode")], handled = false;
phrebejk@460:     var flipCtrlCmd = mac && (opera || qtwebkit);
phrebejk@460:     if (name == null || e.altGraphKey) return false;
phrebejk@460:     if (e_prop(e, "altKey")) name = "Alt-" + name;
phrebejk@460:     if (e_prop(e, flipCtrlCmd ? "metaKey" : "ctrlKey")) name = "Ctrl-" + name;
phrebejk@460:     if (e_prop(e, flipCtrlCmd ? "ctrlKey" : "metaKey")) name = "Cmd-" + name;
phrebejk@460: 
phrebejk@460:     var stopped = false;
phrebejk@460:     function stop() { stopped = true; }
phrebejk@460:     var keymaps = allKeyMaps(cm);
phrebejk@460: 
phrebejk@460:     if (e_prop(e, "shiftKey")) {
phrebejk@460:       handled = lookupKey("Shift-" + name, keymaps,
phrebejk@460:                           function(b) {return doHandleBinding(cm, b, true);}, stop)
phrebejk@460:         || lookupKey(name, keymaps, function(b) {
phrebejk@460:           if (typeof b == "string" && /^go[A-Z]/.test(b)) return doHandleBinding(cm, b);
phrebejk@460:         }, stop);
phrebejk@460:     } else {
phrebejk@460:       handled = lookupKey(name, keymaps,
phrebejk@460:                           function(b) { return doHandleBinding(cm, b); }, stop);
phrebejk@460:     }
phrebejk@460:     if (stopped) handled = false;
phrebejk@460:     if (handled) {
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       restartBlink(cm);
phrebejk@460:       if (ie_lt9) { e.oldKeyCode = e.keyCode; e.keyCode = 0; }
phrebejk@460:     }
phrebejk@460:     return handled;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function handleCharBinding(cm, e, ch) {
phrebejk@460:     var handled = lookupKey("'" + ch + "'", allKeyMaps(cm),
phrebejk@460:                             function(b) { return doHandleBinding(cm, b, true); });
phrebejk@460:     if (handled) {
phrebejk@460:       e_preventDefault(e);
phrebejk@460:       restartBlink(cm);
phrebejk@460:     }
phrebejk@460:     return handled;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var lastStoppedKey = null;
phrebejk@460:   function onKeyDown(e) {
phrebejk@460:     var cm = this;
phrebejk@460:     if (!cm.view.focused) onFocus(cm);
phrebejk@460:     if (ie && e.keyCode == 27) { e.returnValue = false; }
phrebejk@460:     if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
phrebejk@460:     var code = e_prop(e, "keyCode");
phrebejk@460:     // IE does strange things with escape.
phrebejk@460:     cm.view.sel.shift = code == 16 || e_prop(e, "shiftKey");
phrebejk@460:     // First give onKeyEvent option a chance to handle this.
phrebejk@460:     var handled = handleKeyBinding(cm, e);
phrebejk@460:     if (opera) {
phrebejk@460:       lastStoppedKey = handled ? code : null;
phrebejk@460:       // Opera has no cut event... we try to at least catch the key combo
phrebejk@460:       if (!handled && code == 88 && !hasCopyEvent && e_prop(e, mac ? "metaKey" : "ctrlKey"))
phrebejk@460:         cm.replaceSelection("");
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function onKeyPress(e) {
phrebejk@460:     var cm = this;
phrebejk@460:     if (cm.options.onKeyEvent && cm.options.onKeyEvent(cm, addStop(e))) return;
phrebejk@460:     var keyCode = e_prop(e, "keyCode"), charCode = e_prop(e, "charCode");
phrebejk@460:     if (opera && keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}
phrebejk@460:     if (((opera && (!e.which || e.which < 10)) || khtml) && handleKeyBinding(cm, e)) return;
phrebejk@460:     var ch = String.fromCharCode(charCode == null ? keyCode : charCode);
phrebejk@460:     if (this.options.electricChars && this.view.mode.electricChars &&
phrebejk@460:         this.options.smartIndent && !isReadOnly(this) &&
phrebejk@460:         this.view.mode.electricChars.indexOf(ch) > -1)
phrebejk@460:       setTimeout(operation(cm, function() {indentLine(cm, cm.view.sel.to.line, "smart");}), 75);
phrebejk@460:     if (handleCharBinding(cm, e, ch)) return;
phrebejk@460:     fastPoll(cm);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function onFocus(cm) {
phrebejk@460:     if (cm.options.readOnly == "nocursor") return;
phrebejk@460:     if (!cm.view.focused) {
phrebejk@460:       signal(cm, "focus", cm);
phrebejk@460:       cm.view.focused = true;
phrebejk@460:       if (cm.display.scroller.className.search(/\bCodeMirror-focused\b/) == -1)
phrebejk@460:         cm.display.scroller.className += " CodeMirror-focused";
phrebejk@460:       resetInput(cm, true);
phrebejk@460:     }
phrebejk@460:     slowPoll(cm);
phrebejk@460:     restartBlink(cm);
phrebejk@460:   }
phrebejk@460:   function onBlur(cm) {
phrebejk@460:     if (cm.view.focused) {
phrebejk@460:       signal(cm, "blur", cm);
phrebejk@460:       cm.view.focused = false;
phrebejk@460:       cm.display.scroller.className = cm.display.scroller.className.replace(" CodeMirror-focused", "");
phrebejk@460:     }
phrebejk@460:     clearInterval(cm.display.blinker);
phrebejk@460:     setTimeout(function() {if (!cm.view.focused) cm.view.sel.shift = false;}, 150);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var detectingSelectAll;
phrebejk@460:   function onContextMenu(cm, e) {
phrebejk@460:     var display = cm.display, sel = cm.view.sel;
phrebejk@460:     var pos = posFromMouse(cm, e), scrollPos = display.scroller.scrollTop;
phrebejk@460:     if (!pos || opera) return; // Opera is difficult.
phrebejk@460:     if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))
phrebejk@460:       operation(cm, setSelection)(cm, pos, pos);
phrebejk@460: 
phrebejk@460:     var oldCSS = display.input.style.cssText;
phrebejk@460:     display.inputDiv.style.position = "absolute";
phrebejk@460:     display.input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +
phrebejk@460:       "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; outline: none;" +
phrebejk@460:       "border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";
phrebejk@460:     focusInput(cm);
phrebejk@460:     resetInput(cm, true);
phrebejk@460:     // Adds "Select all" to context menu in FF
phrebejk@460:     if (posEq(sel.from, sel.to)) display.input.value = display.prevInput = " ";
phrebejk@460: 
phrebejk@460:     function rehide() {
phrebejk@460:       display.inputDiv.style.position = "relative";
phrebejk@460:       display.input.style.cssText = oldCSS;
phrebejk@460:       if (ie_lt9) display.scrollbarV.scrollTop = display.scroller.scrollTop = scrollPos;
phrebejk@460:       slowPoll(cm);
phrebejk@460: 
phrebejk@460:       // Try to detect the user choosing select-all 
phrebejk@460:       if (display.input.selectionStart != null) {
phrebejk@460:         clearTimeout(detectingSelectAll);
phrebejk@460:         var extval = display.input.value = " " + (posEq(sel.from, sel.to) ? "" : display.input.value), i = 0;
phrebejk@460:         display.prevInput = " ";
phrebejk@460:         display.input.selectionStart = 1; display.input.selectionEnd = extval.length;
phrebejk@460:         detectingSelectAll = setTimeout(function poll(){
phrebejk@460:           if (display.prevInput == " " && display.input.selectionStart == 0)
phrebejk@460:             operation(cm, commands.selectAll)(cm);
phrebejk@460:           else if (i++ < 10) detectingSelectAll = setTimeout(poll, 500);
phrebejk@460:           else resetInput(cm);
phrebejk@460:         }, 200);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     if (gecko) {
phrebejk@460:       e_stop(e);
phrebejk@460:       on(window, "mouseup", function mouseup() {
phrebejk@460:         off(window, "mouseup", mouseup);
phrebejk@460:         setTimeout(rehide, 20);
phrebejk@460:       });
phrebejk@460:     } else {
phrebejk@460:       setTimeout(rehide, 50);
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // UPDATING
phrebejk@460: 
phrebejk@460:   // Replace the range from from to to by the strings in newText.
phrebejk@460:   // Afterwards, set the selection to selFrom, selTo.
phrebejk@460:   function updateDoc(cm, from, to, newText, selUpdate, origin) {
phrebejk@460:     // Possibly split or suppress the update based on the presence
phrebejk@460:     // of read-only spans in its range.
phrebejk@460:     var split = sawReadOnlySpans &&
phrebejk@460:       removeReadOnlyRanges(cm.view.doc, from, to);
phrebejk@460:     if (split) {
phrebejk@460:       for (var i = split.length - 1; i >= 1; --i)
phrebejk@460:         updateDocInner(cm, split[i].from, split[i].to, [""], origin);
phrebejk@460:       if (split.length)
phrebejk@460:         return updateDocInner(cm, split[0].from, split[0].to, newText, selUpdate, origin);
phrebejk@460:     } else {
phrebejk@460:       return updateDocInner(cm, from, to, newText, selUpdate, origin);
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateDocInner(cm, from, to, newText, selUpdate, origin) {
phrebejk@460:     if (cm.view.suppressEdits) return;
phrebejk@460: 
phrebejk@460:     var view = cm.view, doc = view.doc, old = [];
phrebejk@460:     doc.iter(from.line, to.line + 1, function(line) {
phrebejk@460:       old.push(newHL(line.text, line.markedSpans));
phrebejk@460:     });
phrebejk@460:     var startSelFrom = view.sel.from, startSelTo = view.sel.to;
phrebejk@460:     var lines = updateMarkedSpans(hlSpans(old[0]), hlSpans(lst(old)), from.ch, to.ch, newText);
phrebejk@460:     var retval = updateDocNoUndo(cm, from, to, lines, selUpdate, origin);
phrebejk@460:     if (view.history) addChange(cm, from.line, newText.length, old, origin,
phrebejk@460:                                 startSelFrom, startSelTo, view.sel.from, view.sel.to);
phrebejk@460:     return retval;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function unredoHelper(cm, type) {
phrebejk@460:     var doc = cm.view.doc, hist = cm.view.history;
phrebejk@460:     var set = (type == "undo" ? hist.done : hist.undone).pop();
phrebejk@460:     if (!set) return;
phrebejk@460:     var anti = {events: [], fromBefore: set.fromAfter, toBefore: set.toAfter,
phrebejk@460:                 fromAfter: set.fromBefore, toAfter: set.toBefore};
phrebejk@460:     for (var i = set.events.length - 1; i >= 0; i -= 1) {
phrebejk@460:       hist.dirtyCounter += type == "undo" ? -1 : 1;
phrebejk@460:       var change = set.events[i];
phrebejk@460:       var replaced = [], end = change.start + change.added;
phrebejk@460:       doc.iter(change.start, end, function(line) { replaced.push(newHL(line.text, line.markedSpans)); });
phrebejk@460:       anti.events.push({start: change.start, added: change.old.length, old: replaced});
phrebejk@460:       var selPos = i ? null : {from: set.fromBefore, to: set.toBefore};
phrebejk@460:       updateDocNoUndo(cm, {line: change.start, ch: 0}, {line: end - 1, ch: getLine(doc, end-1).text.length},
phrebejk@460:                       change.old, selPos, type);
phrebejk@460:     }
phrebejk@460:     (type == "undo" ? hist.undone : hist.done).push(anti);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateDocNoUndo(cm, from, to, lines, selUpdate, origin) {
phrebejk@460:     var view = cm.view, doc = view.doc, display = cm.display;
phrebejk@460:     if (view.suppressEdits) return;
phrebejk@460: 
phrebejk@460:     var nlines = to.line - from.line, firstLine = getLine(doc, from.line), lastLine = getLine(doc, to.line);
phrebejk@460:     var recomputeMaxLength = false, checkWidthStart = from.line;
phrebejk@460:     if (!cm.options.lineWrapping) {
phrebejk@460:       checkWidthStart = lineNo(visualLine(doc, firstLine));
phrebejk@460:       doc.iter(checkWidthStart, to.line + 1, function(line) {
phrebejk@460:         if (lineLength(doc, line) == view.maxLineLength) {
phrebejk@460:           recomputeMaxLength = true;
phrebejk@460:           return true;
phrebejk@460:         }
phrebejk@460:       });
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var lastHL = lst(lines), th = textHeight(display);
phrebejk@460: 
phrebejk@460:     // First adjust the line structure
phrebejk@460:     if (from.ch == 0 && to.ch == 0 && hlText(lastHL) == "") {
phrebejk@460:       // This is a whole-line replace. Treated specially to make
phrebejk@460:       // sure line objects move the way they are supposed to.
phrebejk@460:       var added = [];
phrebejk@460:       for (var i = 0, e = lines.length - 1; i < e; ++i)
phrebejk@460:         added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
phrebejk@460:       updateLine(cm, lastLine, lastLine.text, hlSpans(lastHL));
phrebejk@460:       if (nlines) doc.remove(from.line, nlines, cm);
phrebejk@460:       if (added.length) doc.insert(from.line, added);
phrebejk@460:     } else if (firstLine == lastLine) {
phrebejk@460:       if (lines.length == 1) {
phrebejk@460:         updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]) +
phrebejk@460:                    firstLine.text.slice(to.ch), hlSpans(lines[0]));
phrebejk@460:       } else {
phrebejk@460:         for (var added = [], i = 1, e = lines.length - 1; i < e; ++i)
phrebejk@460:           added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
phrebejk@460:         added.push(makeLine(hlText(lastHL) + firstLine.text.slice(to.ch), hlSpans(lastHL), th));
phrebejk@460:         updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]), hlSpans(lines[0]));
phrebejk@460:         doc.insert(from.line + 1, added);
phrebejk@460:       }
phrebejk@460:     } else if (lines.length == 1) {
phrebejk@460:       updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]) +
phrebejk@460:                  lastLine.text.slice(to.ch), hlSpans(lines[0]));
phrebejk@460:       doc.remove(from.line + 1, nlines, cm);
phrebejk@460:     } else {
phrebejk@460:       var added = [];
phrebejk@460:       updateLine(cm, firstLine, firstLine.text.slice(0, from.ch) + hlText(lines[0]), hlSpans(lines[0]));
phrebejk@460:       updateLine(cm, lastLine, hlText(lastHL) + lastLine.text.slice(to.ch), hlSpans(lastHL));
phrebejk@460:       for (var i = 1, e = lines.length - 1; i < e; ++i)
phrebejk@460:         added.push(makeLine(hlText(lines[i]), hlSpans(lines[i]), th));
phrebejk@460:       if (nlines > 1) doc.remove(from.line + 1, nlines - 1, cm);
phrebejk@460:       doc.insert(from.line + 1, added);
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     if (cm.options.lineWrapping) {
phrebejk@460:       var perLine = Math.max(5, display.scroller.clientWidth / charWidth(display) - 3);
phrebejk@460:       doc.iter(from.line, from.line + lines.length, function(line) {
phrebejk@460:         if (line.height == 0) return;
phrebejk@460:         var guess = (Math.ceil(line.text.length / perLine) || 1) * th;
phrebejk@460:         if (guess != line.height) updateLineHeight(line, guess);
phrebejk@460:       });
phrebejk@460:     } else {
phrebejk@460:       doc.iter(checkWidthStart, from.line + lines.length, function(line) {
phrebejk@460:         var len = lineLength(doc, line);
phrebejk@460:         if (len > view.maxLineLength) {
phrebejk@460:           view.maxLine = line;
phrebejk@460:           view.maxLineLength = len;
phrebejk@460:           view.maxLineChanged = true;
phrebejk@460:           recomputeMaxLength = false;
phrebejk@460:         }
phrebejk@460:       });
phrebejk@460:       if (recomputeMaxLength) cm.curOp.updateMaxLine = true;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     // Adjust frontier, schedule worker
phrebejk@460:     view.frontier = Math.min(view.frontier, from.line);
phrebejk@460:     startWorker(cm, 400);
phrebejk@460: 
phrebejk@460:     var lendiff = lines.length - nlines - 1;
phrebejk@460:     // Remember that these lines changed, for updating the display
phrebejk@460:     regChange(cm, from.line, to.line + 1, lendiff);
phrebejk@460:     if (hasHandler(cm, "change")) {
phrebejk@460:       // Normalize lines to contain only strings, since that's what
phrebejk@460:       // the change event handler expects
phrebejk@460:       for (var i = 0; i < lines.length; ++i)
phrebejk@460:         if (typeof lines[i] != "string") lines[i] = lines[i].text;
phrebejk@460:       var changeObj = {from: from, to: to, text: lines, origin: origin};
phrebejk@460:       if (cm.curOp.textChanged) {
phrebejk@460:         for (var cur = cm.curOp.textChanged; cur.next; cur = cur.next) {}
phrebejk@460:         cur.next = changeObj;
phrebejk@460:       } else cm.curOp.textChanged = changeObj;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     // Update the selection
phrebejk@460:     var newSelFrom, newSelTo, end = {line: from.line + lines.length - 1,
phrebejk@460:                                      ch: hlText(lastHL).length  + (lines.length == 1 ? from.ch : 0)};
phrebejk@460:     if (selUpdate && typeof selUpdate != "string") {
phrebejk@460:       if (selUpdate.from) { newSelFrom = selUpdate.from; newSelTo = selUpdate.to; }
phrebejk@460:       else newSelFrom = newSelTo = selUpdate;
phrebejk@460:     } else if (selUpdate == "end") {
phrebejk@460:       newSelFrom = newSelTo = end;
phrebejk@460:     } else if (selUpdate == "start") {
phrebejk@460:       newSelFrom = newSelTo = from;
phrebejk@460:     } else if (selUpdate == "around") {
phrebejk@460:       newSelFrom = from; newSelTo = end;
phrebejk@460:     } else {
phrebejk@460:       var adjustPos = function(pos) {
phrebejk@460:         if (posLess(pos, from)) return pos;
phrebejk@460:         if (!posLess(to, pos)) return end;
phrebejk@460:         var line = pos.line + lendiff;
phrebejk@460:         var ch = pos.ch;
phrebejk@460:         if (pos.line == to.line)
phrebejk@460:           ch += hlText(lastHL).length - (to.ch - (to.line == from.line ? from.ch : 0));
phrebejk@460:         return {line: line, ch: ch};
phrebejk@460:       };
phrebejk@460:       newSelFrom = adjustPos(view.sel.from);
phrebejk@460:       newSelTo = adjustPos(view.sel.to);
phrebejk@460:     }
phrebejk@460:     setSelection(cm, newSelFrom, newSelTo, null, true);
phrebejk@460:     return end;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function replaceRange(cm, code, from, to, origin) {
phrebejk@460:     if (!to) to = from;
phrebejk@460:     if (posLess(to, from)) { var tmp = to; to = from; from = tmp; }
phrebejk@460:     return updateDoc(cm, from, to, splitLines(code), null, origin);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // SELECTION
phrebejk@460: 
phrebejk@460:   function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}
phrebejk@460:   function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}
phrebejk@460:   function copyPos(x) {return {line: x.line, ch: x.ch};}
phrebejk@460: 
phrebejk@460:   function clipLine(doc, n) {return Math.max(0, Math.min(n, doc.size-1));}
phrebejk@460:   function clipPos(doc, pos) {
phrebejk@460:     if (pos.line < 0) return {line: 0, ch: 0};
phrebejk@460:     if (pos.line >= doc.size) return {line: doc.size-1, ch: getLine(doc, doc.size-1).text.length};
phrebejk@460:     var ch = pos.ch, linelen = getLine(doc, pos.line).text.length;
phrebejk@460:     if (ch == null || ch > linelen) return {line: pos.line, ch: linelen};
phrebejk@460:     else if (ch < 0) return {line: pos.line, ch: 0};
phrebejk@460:     else return pos;
phrebejk@460:   }
phrebejk@460:   function isLine(doc, l) {return l >= 0 && l < doc.size;}
phrebejk@460: 
phrebejk@460:   // If shift is held, this will move the selection anchor. Otherwise,
phrebejk@460:   // it'll set the whole selection.
phrebejk@460:   function extendSelection(cm, pos, other, bias) {
phrebejk@460:     var sel = cm.view.sel;
phrebejk@460:     if (sel.shift || sel.extend) {
phrebejk@460:       var anchor = sel.anchor;
phrebejk@460:       if (other) {
phrebejk@460:         var posBefore = posLess(pos, anchor);
phrebejk@460:         if (posBefore != posLess(other, anchor)) {
phrebejk@460:           anchor = pos;
phrebejk@460:           pos = other;
phrebejk@460:         } else if (posBefore != posLess(pos, other)) {
phrebejk@460:           pos = other;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       setSelection(cm, anchor, pos, bias);
phrebejk@460:     } else {
phrebejk@460:       setSelection(cm, pos, other || pos, bias);
phrebejk@460:     }
phrebejk@460:     cm.curOp.userSelChange = true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Update the selection. Last two args are only used by
phrebejk@460:   // updateDoc, since they have to be expressed in the line
phrebejk@460:   // numbers before the update.
phrebejk@460:   function setSelection(cm, anchor, head, bias, checkAtomic) {
phrebejk@460:     cm.view.goalColumn = null;
phrebejk@460:     var sel = cm.view.sel;
phrebejk@460:     // Skip over atomic spans.
phrebejk@460:     if (checkAtomic || !posEq(anchor, sel.anchor))
phrebejk@460:       anchor = skipAtomic(cm, anchor, bias, checkAtomic != "push");
phrebejk@460:     if (checkAtomic || !posEq(head, sel.head))
phrebejk@460:       head = skipAtomic(cm, head, bias, checkAtomic != "push");
phrebejk@460: 
phrebejk@460:     if (posEq(sel.anchor, anchor) && posEq(sel.head, head)) return;
phrebejk@460: 
phrebejk@460:     sel.anchor = anchor; sel.head = head;
phrebejk@460:     var inv = posLess(head, anchor);
phrebejk@460:     sel.from = inv ? head : anchor;
phrebejk@460:     sel.to = inv ? anchor : head;
phrebejk@460: 
phrebejk@460:     cm.curOp.updateInput = true;
phrebejk@460:     cm.curOp.selectionChanged = true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function reCheckSelection(cm) {
phrebejk@460:     setSelection(cm, cm.view.sel.from, cm.view.sel.to, null, "push");
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function skipAtomic(cm, pos, bias, mayClear) {
phrebejk@460:     var doc = cm.view.doc, flipped = false, curPos = pos;
phrebejk@460:     var dir = bias || 1;
phrebejk@460:     cm.view.cantEdit = false;
phrebejk@460:     search: for (;;) {
phrebejk@460:       var line = getLine(doc, curPos.line), toClear;
phrebejk@460:       if (line.markedSpans) {
phrebejk@460:         for (var i = 0; i < line.markedSpans.length; ++i) {
phrebejk@460:           var sp = line.markedSpans[i], m = sp.marker;
phrebejk@460:           if ((sp.from == null || (m.inclusiveLeft ? sp.from <= curPos.ch : sp.from < curPos.ch)) &&
phrebejk@460:               (sp.to == null || (m.inclusiveRight ? sp.to >= curPos.ch : sp.to > curPos.ch))) {
phrebejk@460:             if (mayClear && m.clearOnEnter) {
phrebejk@460:               (toClear || (toClear = [])).push(m);
phrebejk@460:               continue;
phrebejk@460:             } else if (!m.atomic) continue;
phrebejk@460:             var newPos = m.find()[dir < 0 ? "from" : "to"];
phrebejk@460:             if (posEq(newPos, curPos)) {
phrebejk@460:               newPos.ch += dir;
phrebejk@460:               if (newPos.ch < 0) {
phrebejk@460:                 if (newPos.line) newPos = clipPos(doc, {line: newPos.line - 1});
phrebejk@460:                 else newPos = null;
phrebejk@460:               } else if (newPos.ch > line.text.length) {
phrebejk@460:                 if (newPos.line < doc.size - 1) newPos = {line: newPos.line + 1, ch: 0};
phrebejk@460:                 else newPos = null;
phrebejk@460:               }
phrebejk@460:               if (!newPos) {
phrebejk@460:                 if (flipped) {
phrebejk@460:                   // Driven in a corner -- no valid cursor position found at all
phrebejk@460:                   // -- try again *with* clearing, if we didn't already
phrebejk@460:                   if (!mayClear) return skipAtomic(cm, pos, bias, true);
phrebejk@460:                   // Otherwise, turn off editing until further notice, and return the start of the doc
phrebejk@460:                   cm.view.cantEdit = true;
phrebejk@460:                   return {line: 0, ch: 0};
phrebejk@460:                 }
phrebejk@460:                 flipped = true; newPos = pos; dir = -dir;
phrebejk@460:               }
phrebejk@460:             }
phrebejk@460:             curPos = newPos;
phrebejk@460:             continue search;
phrebejk@460:           }
phrebejk@460:         }
phrebejk@460:         if (toClear) for (var i = 0; i < toClear.length; ++i) toClear[i].clear();
phrebejk@460:       }
phrebejk@460:       return curPos;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // SCROLLING
phrebejk@460: 
phrebejk@460:   function scrollCursorIntoView(cm) {
phrebejk@460:     var view = cm.view;
phrebejk@460:     var coords = scrollPosIntoView(cm, view.sel.head);
phrebejk@460:     if (!view.focused) return;
phrebejk@460:     var display = cm.display, box = display.sizer.getBoundingClientRect(), doScroll = null;
phrebejk@460:     if (coords.top + box.top < 0) doScroll = true;
phrebejk@460:     else if (coords.bottom + box.top > (window.innerHeight || document.documentElement.clientHeight)) doScroll = false;
phrebejk@460:     if (doScroll != null && !phantom) {
phrebejk@460:       var hidden = display.cursor.style.display == "none";
phrebejk@460:       if (hidden) {
phrebejk@460:         display.cursor.style.display = "";
phrebejk@460:         display.cursor.style.left = coords.left + "px";
phrebejk@460:         display.cursor.style.top = (coords.top - display.viewOffset) + "px";
phrebejk@460:       }
phrebejk@460:       display.cursor.scrollIntoView(doScroll);
phrebejk@460:       if (hidden) display.cursor.style.display = "none";
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function scrollPosIntoView(cm, pos) {
phrebejk@460:     for (;;) {
phrebejk@460:       var changed = false, coords = cursorCoords(cm, pos);
phrebejk@460:       var scrollPos = calculateScrollPos(cm, coords.left, coords.top, coords.left, coords.bottom);
phrebejk@460:       var startTop = cm.view.scrollTop, startLeft = cm.view.scrollLeft;
phrebejk@460:       if (scrollPos.scrollTop != null) {
phrebejk@460:         setScrollTop(cm, scrollPos.scrollTop);
phrebejk@460:         if (Math.abs(cm.view.scrollTop - startTop) > 1) changed = true;
phrebejk@460:       }
phrebejk@460:       if (scrollPos.scrollLeft != null) {
phrebejk@460:         setScrollLeft(cm, scrollPos.scrollLeft);
phrebejk@460:         if (Math.abs(cm.view.scrollLeft - startLeft) > 1) changed = true;
phrebejk@460:       }
phrebejk@460:       if (!changed) return coords;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function scrollIntoView(cm, x1, y1, x2, y2) {
phrebejk@460:     var scrollPos = calculateScrollPos(cm, x1, y1, x2, y2);
phrebejk@460:     if (scrollPos.scrollTop != null) setScrollTop(cm, scrollPos.scrollTop);
phrebejk@460:     if (scrollPos.scrollLeft != null) setScrollLeft(cm, scrollPos.scrollLeft);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function calculateScrollPos(cm, x1, y1, x2, y2) {
phrebejk@460:     var display = cm.display, pt = paddingTop(display);
phrebejk@460:     y1 += pt; y2 += pt;
phrebejk@460:     var screen = display.scroller.clientHeight - scrollerCutOff, screentop = display.scroller.scrollTop, result = {};
phrebejk@460:     var docBottom = cm.view.doc.height + 2 * pt;
phrebejk@460:     var atTop = y1 < pt + 10, atBottom = y2 + pt > docBottom - 10;
phrebejk@460:     if (y1 < screentop) result.scrollTop = atTop ? 0 : Math.max(0, y1);
phrebejk@460:     else if (y2 > screentop + screen) result.scrollTop = (atBottom ? docBottom : y2) - screen;
phrebejk@460: 
phrebejk@460:     var screenw = display.scroller.clientWidth - scrollerCutOff, screenleft = display.scroller.scrollLeft;
phrebejk@460:     x1 += display.gutters.offsetWidth; x2 += display.gutters.offsetWidth;
phrebejk@460:     var gutterw = display.gutters.offsetWidth;
phrebejk@460:     var atLeft = x1 < gutterw + 10;
phrebejk@460:     if (x1 < screenleft + gutterw || atLeft) {
phrebejk@460:       if (atLeft) x1 = 0;
phrebejk@460:       result.scrollLeft = Math.max(0, x1 - 10 - gutterw);
phrebejk@460:     } else if (x2 > screenw + screenleft - 3) {
phrebejk@460:       result.scrollLeft = x2 + 10 - screenw;
phrebejk@460:     }
phrebejk@460:     return result;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // API UTILITIES
phrebejk@460: 
phrebejk@460:   function indentLine(cm, n, how, aggressive) {
phrebejk@460:     var doc = cm.view.doc;
phrebejk@460:     if (!how) how = "add";
phrebejk@460:     if (how == "smart") {
phrebejk@460:       if (!cm.view.mode.indent) how = "prev";
phrebejk@460:       else var state = getStateBefore(cm, n);
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var tabSize = cm.options.tabSize;
phrebejk@460:     var line = getLine(doc, n), curSpace = countColumn(line.text, null, tabSize);
phrebejk@460:     var curSpaceString = line.text.match(/^\s*/)[0], indentation;
phrebejk@460:     if (how == "smart") {
phrebejk@460:       indentation = cm.view.mode.indent(state, line.text.slice(curSpaceString.length), line.text);
phrebejk@460:       if (indentation == Pass) {
phrebejk@460:         if (!aggressive) return;
phrebejk@460:         how = "prev";
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (how == "prev") {
phrebejk@460:       if (n) indentation = countColumn(getLine(doc, n-1).text, null, tabSize);
phrebejk@460:       else indentation = 0;
phrebejk@460:     }
phrebejk@460:     else if (how == "add") indentation = curSpace + cm.options.indentUnit;
phrebejk@460:     else if (how == "subtract") indentation = curSpace - cm.options.indentUnit;
phrebejk@460:     indentation = Math.max(0, indentation);
phrebejk@460: 
phrebejk@460:     var indentString = "", pos = 0;
phrebejk@460:     if (cm.options.indentWithTabs)
phrebejk@460:       for (var i = Math.floor(indentation / tabSize); i; --i) {pos += tabSize; indentString += "\t";}
phrebejk@460:     if (pos < indentation) indentString += spaceStr(indentation - pos);
phrebejk@460: 
phrebejk@460:     if (indentString != curSpaceString)
phrebejk@460:       replaceRange(cm, indentString, {line: n, ch: 0}, {line: n, ch: curSpaceString.length}, "input");
phrebejk@460:     line.stateAfter = null;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function changeLine(cm, handle, op) {
phrebejk@460:     var no = handle, line = handle, doc = cm.view.doc;
phrebejk@460:     if (typeof handle == "number") line = getLine(doc, clipLine(doc, handle));
phrebejk@460:     else no = lineNo(handle);
phrebejk@460:     if (no == null) return null;
phrebejk@460:     if (op(line, no)) regChange(cm, no, no + 1);
phrebejk@460:     else return null;
phrebejk@460:     return line;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function findPosH(cm, dir, unit, visually) {
phrebejk@460:     var doc = cm.view.doc, end = cm.view.sel.head, line = end.line, ch = end.ch;
phrebejk@460:     var lineObj = getLine(doc, line);
phrebejk@460:     function findNextLine() {
phrebejk@460:       var l = line + dir;
phrebejk@460:       if (l < 0 || l == doc.size) return false;
phrebejk@460:       line = l;
phrebejk@460:       return lineObj = getLine(doc, l);
phrebejk@460:     }
phrebejk@460:     function moveOnce(boundToLine) {
phrebejk@460:       var next = (visually ? moveVisually : moveLogically)(lineObj, ch, dir, true);
phrebejk@460:       if (next == null) {
phrebejk@460:         if (!boundToLine && findNextLine()) {
phrebejk@460:           if (visually) ch = (dir < 0 ? lineRight : lineLeft)(lineObj);
phrebejk@460:           else ch = dir < 0 ? lineObj.text.length : 0;
phrebejk@460:         } else return false;
phrebejk@460:       } else ch = next;
phrebejk@460:       return true;
phrebejk@460:     }
phrebejk@460:     if (unit == "char") moveOnce();
phrebejk@460:     else if (unit == "column") moveOnce(true);
phrebejk@460:     else if (unit == "word") {
phrebejk@460:       var sawWord = false;
phrebejk@460:       for (;;) {
phrebejk@460:         if (dir < 0) if (!moveOnce()) break;
phrebejk@460:         if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;
phrebejk@460:         else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}
phrebejk@460:         if (dir > 0) if (!moveOnce()) break;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return skipAtomic(cm, {line: line, ch: ch}, dir, true);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function findWordAt(line, pos) {
phrebejk@460:     var start = pos.ch, end = pos.ch;
phrebejk@460:     if (line) {
phrebejk@460:       if (pos.after === false || end == line.length) --start; else ++end;
phrebejk@460:       var startChar = line.charAt(start);
phrebejk@460:       var check = isWordChar(startChar) ? isWordChar :
phrebejk@460:         /\s/.test(startChar) ? function(ch) {return /\s/.test(ch);} :
phrebejk@460:       function(ch) {return !/\s/.test(ch) && !isWordChar(ch);};
phrebejk@460:       while (start > 0 && check(line.charAt(start - 1))) --start;
phrebejk@460:       while (end < line.length && check(line.charAt(end))) ++end;
phrebejk@460:     }
phrebejk@460:     return {from: {line: pos.line, ch: start}, to: {line: pos.line, ch: end}};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function selectLine(cm, line) {
phrebejk@460:     extendSelection(cm, {line: line, ch: 0}, clipPos(cm.view.doc, {line: line + 1, ch: 0}));
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // PROTOTYPE
phrebejk@460: 
phrebejk@460:   // The publicly visible API. Note that operation(null, f) means
phrebejk@460:   // 'wrap f in an operation, performed on its `this` parameter'
phrebejk@460: 
phrebejk@460:   CodeMirror.prototype = {
phrebejk@460:     getValue: function(lineSep) {
phrebejk@460:       var text = [], doc = this.view.doc;
phrebejk@460:       doc.iter(0, doc.size, function(line) { text.push(line.text); });
phrebejk@460:       return text.join(lineSep || "\n");
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     setValue: operation(null, function(code) {
phrebejk@460:       var doc = this.view.doc, top = {line: 0, ch: 0}, lastLen = getLine(doc, doc.size-1).text.length;
phrebejk@460:       updateDocInner(this, top, {line: doc.size - 1, ch: lastLen}, splitLines(code), top, top, "setValue");
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     getSelection: function(lineSep) { return this.getRange(this.view.sel.from, this.view.sel.to, lineSep); },
phrebejk@460: 
phrebejk@460:     replaceSelection: operation(null, function(code, collapse, origin) {
phrebejk@460:       var sel = this.view.sel;
phrebejk@460:       updateDoc(this, sel.from, sel.to, splitLines(code), collapse || "around", origin);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     focus: function(){window.focus(); focusInput(this); onFocus(this); fastPoll(this);},
phrebejk@460: 
phrebejk@460:     setOption: function(option, value) {
phrebejk@460:       var options = this.options, old = options[option];
phrebejk@460:       if (options[option] == value && option != "mode") return;
phrebejk@460:       options[option] = value;
phrebejk@460:       if (optionHandlers.hasOwnProperty(option))
phrebejk@460:         operation(this, optionHandlers[option])(this, value, old);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     getOption: function(option) {return this.options[option];},
phrebejk@460: 
phrebejk@460:     getMode: function() {return this.view.mode;},
phrebejk@460: 
phrebejk@460:     addKeyMap: function(map) {
phrebejk@460:       this.view.keyMaps.push(map);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     removeKeyMap: function(map) {
phrebejk@460:       var maps = this.view.keyMaps;
phrebejk@460:       for (var i = 0; i < maps.length; ++i)
phrebejk@460:         if ((typeof map == "string" ? maps[i].name : maps[i]) == map) {
phrebejk@460:           maps.splice(i, 1);
phrebejk@460:           return true;
phrebejk@460:         }
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     undo: operation(null, function() {unredoHelper(this, "undo");}),
phrebejk@460:     redo: operation(null, function() {unredoHelper(this, "redo");}),
phrebejk@460: 
phrebejk@460:     indentLine: operation(null, function(n, dir, aggressive) {
phrebejk@460:       if (typeof dir != "string") {
phrebejk@460:         if (dir == null) dir = this.options.smartIndent ? "smart" : "prev";
phrebejk@460:         else dir = dir ? "add" : "subtract";
phrebejk@460:       }
phrebejk@460:       if (isLine(this.view.doc, n)) indentLine(this, n, dir, aggressive);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     indentSelection: operation(null, function(how) {
phrebejk@460:       var sel = this.view.sel;
phrebejk@460:       if (posEq(sel.from, sel.to)) return indentLine(this, sel.from.line, how);
phrebejk@460:       var e = sel.to.line - (sel.to.ch ? 0 : 1);
phrebejk@460:       for (var i = sel.from.line; i <= e; ++i) indentLine(this, i, how);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     historySize: function() {
phrebejk@460:       var hist = this.view.history;
phrebejk@460:       return {undo: hist.done.length, redo: hist.undone.length};
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     clearHistory: function() {this.view.history = makeHistory();},
phrebejk@460: 
phrebejk@460:     markClean: function() {
phrebejk@460:       this.view.history.dirtyCounter = 0;
phrebejk@460:       this.view.history.lastOp = this.view.history.lastOrigin = null;
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     isClean: function () {return this.view.history.dirtyCounter == 0;},
phrebejk@460:       
phrebejk@460:     getHistory: function() {
phrebejk@460:       var hist = this.view.history;
phrebejk@460:       function cp(arr) {
phrebejk@460:         for (var i = 0, nw = [], nwelt; i < arr.length; ++i) {
phrebejk@460:           var set = arr[i];
phrebejk@460:           nw.push({events: nwelt = [], fromBefore: set.fromBefore, toBefore: set.toBefore,
phrebejk@460:                    fromAfter: set.fromAfter, toAfter: set.toAfter});
phrebejk@460:           for (var j = 0, elt = set.events; j < elt.length; ++j) {
phrebejk@460:             var old = [], cur = elt[j];
phrebejk@460:             nwelt.push({start: cur.start, added: cur.added, old: old});
phrebejk@460:             for (var k = 0; k < cur.old.length; ++k) old.push(hlText(cur.old[k]));
phrebejk@460:           }
phrebejk@460:         }
phrebejk@460:         return nw;
phrebejk@460:       }
phrebejk@460:       return {done: cp(hist.done), undone: cp(hist.undone)};
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     setHistory: function(histData) {
phrebejk@460:       var hist = this.view.history = makeHistory();
phrebejk@460:       hist.done = histData.done;
phrebejk@460:       hist.undone = histData.undone;
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     // Fetch the parser token for a given character. Useful for hacks
phrebejk@460:     // that want to inspect the mode state (say, for completion).
phrebejk@460:     getTokenAt: function(pos) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       pos = clipPos(doc, pos);
phrebejk@460:       var state = getStateBefore(this, pos.line), mode = this.view.mode;
phrebejk@460:       var line = getLine(doc, pos.line);
phrebejk@460:       var stream = new StringStream(line.text, this.options.tabSize);
phrebejk@460:       while (stream.pos < pos.ch && !stream.eol()) {
phrebejk@460:         stream.start = stream.pos;
phrebejk@460:         var style = mode.token(stream, state);
phrebejk@460:       }
phrebejk@460:       return {start: stream.start,
phrebejk@460:               end: stream.pos,
phrebejk@460:               string: stream.current(),
phrebejk@460:               className: style || null, // Deprecated, use 'type' instead
phrebejk@460:               type: style || null,
phrebejk@460:               state: state};
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     getStateAfter: function(line) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       line = clipLine(doc, line == null ? doc.size - 1: line);
phrebejk@460:       return getStateBefore(this, line + 1);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     cursorCoords: function(start, mode) {
phrebejk@460:       var pos, sel = this.view.sel;
phrebejk@460:       if (start == null) pos = sel.head;
phrebejk@460:       else if (typeof start == "object") pos = clipPos(this.view.doc, start);
phrebejk@460:       else pos = start ? sel.from : sel.to;
phrebejk@460:       return cursorCoords(this, pos, mode || "page");
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     charCoords: function(pos, mode) {
phrebejk@460:       return charCoords(this, clipPos(this.view.doc, pos), mode || "page");
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     coordsChar: function(coords) {
phrebejk@460:       var off = this.display.lineSpace.getBoundingClientRect();
phrebejk@460:       return coordsChar(this, coords.left - off.left, coords.top - off.top);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     defaultTextHeight: function() { return textHeight(this.display); },
phrebejk@460: 
phrebejk@460:     markText: operation(null, function(from, to, options) {
phrebejk@460:       return markText(this, clipPos(this.view.doc, from), clipPos(this.view.doc, to),
phrebejk@460:                       options, "range");
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     setBookmark: operation(null, function(pos, widget) {
phrebejk@460:       pos = clipPos(this.view.doc, pos);
phrebejk@460:       return markText(this, pos, pos, widget ? {replacedWith: widget} : {}, "bookmark");
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     findMarksAt: function(pos) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       pos = clipPos(doc, pos);
phrebejk@460:       var markers = [], spans = getLine(doc, pos.line).markedSpans;
phrebejk@460:       if (spans) for (var i = 0; i < spans.length; ++i) {
phrebejk@460:         var span = spans[i];
phrebejk@460:         if ((span.from == null || span.from <= pos.ch) &&
phrebejk@460:             (span.to == null || span.to >= pos.ch))
phrebejk@460:           markers.push(span.marker);
phrebejk@460:       }
phrebejk@460:       return markers;
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     setGutterMarker: operation(null, function(line, gutterID, value) {
phrebejk@460:       return changeLine(this, line, function(line) {
phrebejk@460:         var markers = line.gutterMarkers || (line.gutterMarkers = {});
phrebejk@460:         markers[gutterID] = value;
phrebejk@460:         if (!value && isEmpty(markers)) line.gutterMarkers = null;
phrebejk@460:         return true;
phrebejk@460:       });
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     clearGutter: operation(null, function(gutterID) {
phrebejk@460:       var i = 0, cm = this, doc = cm.view.doc;
phrebejk@460:       doc.iter(0, doc.size, function(line) {
phrebejk@460:         if (line.gutterMarkers && line.gutterMarkers[gutterID]) {
phrebejk@460:           line.gutterMarkers[gutterID] = null;
phrebejk@460:           regChange(cm, i, i + 1);
phrebejk@460:           if (isEmpty(line.gutterMarkers)) line.gutterMarkers = null;
phrebejk@460:         }
phrebejk@460:         ++i;
phrebejk@460:       });
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     addLineClass: operation(null, function(handle, where, cls) {
phrebejk@460:       return changeLine(this, handle, function(line) {
phrebejk@460:         var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
phrebejk@460:         if (!line[prop]) line[prop] = cls;
phrebejk@460:         else if (new RegExp("\\b" + cls + "\\b").test(line[prop])) return false;
phrebejk@460:         else line[prop] += " " + cls;
phrebejk@460:         return true;
phrebejk@460:       });
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     removeLineClass: operation(null, function(handle, where, cls) {
phrebejk@460:       return changeLine(this, handle, function(line) {
phrebejk@460:         var prop = where == "text" ? "textClass" : where == "background" ? "bgClass" : "wrapClass";
phrebejk@460:         var cur = line[prop];
phrebejk@460:         if (!cur) return false;
phrebejk@460:         else if (cls == null) line[prop] = null;
phrebejk@460:         else {
phrebejk@460:           var upd = cur.replace(new RegExp("^" + cls + "\\b\\s*|\\s*\\b" + cls + "\\b"), "");
phrebejk@460:           if (upd == cur) return false;
phrebejk@460:           line[prop] = upd || null;
phrebejk@460:         }
phrebejk@460:         return true;
phrebejk@460:       });
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     addLineWidget: operation(null, function(handle, node, options) {
phrebejk@460:       var widget = options || {};
phrebejk@460:       widget.node = node;
phrebejk@460:       if (widget.noHScroll) this.display.alignWidgets = true;
phrebejk@460:       changeLine(this, handle, function(line) {
phrebejk@460:         (line.widgets || (line.widgets = [])).push(widget);
phrebejk@460:         widget.line = line;
phrebejk@460:         return true;
phrebejk@460:       });
phrebejk@460:       return widget;
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     removeLineWidget: operation(null, function(widget) {
phrebejk@460:       var ws = widget.line.widgets, no = lineNo(widget.line);
phrebejk@460:       if (no == null) return;
phrebejk@460:       for (var i = 0; i < ws.length; ++i) if (ws[i] == widget) ws.splice(i--, 1);
phrebejk@460:       regChange(this, no, no + 1);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     lineInfo: function(line) {
phrebejk@460:       if (typeof line == "number") {
phrebejk@460:         if (!isLine(this.view.doc, line)) return null;
phrebejk@460:         var n = line;
phrebejk@460:         line = getLine(this.view.doc, line);
phrebejk@460:         if (!line) return null;
phrebejk@460:       } else {
phrebejk@460:         var n = lineNo(line);
phrebejk@460:         if (n == null) return null;
phrebejk@460:       }
phrebejk@460:       return {line: n, handle: line, text: line.text, gutterMarkers: line.gutterMarkers,
phrebejk@460:               textClass: line.textClass, bgClass: line.bgClass, wrapClass: line.wrapClass,
phrebejk@460:               widgets: line.widgets};
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     getViewport: function() { return {from: this.display.showingFrom, to: this.display.showingTo};},
phrebejk@460: 
phrebejk@460:     addWidget: function(pos, node, scroll, vert, horiz) {
phrebejk@460:       var display = this.display;
phrebejk@460:       pos = cursorCoords(this, clipPos(this.view.doc, pos));
phrebejk@460:       var top = pos.top, left = pos.left;
phrebejk@460:       node.style.position = "absolute";
phrebejk@460:       display.sizer.appendChild(node);
phrebejk@460:       if (vert == "over") top = pos.top;
phrebejk@460:       else if (vert == "near") {
phrebejk@460:         var vspace = Math.max(display.wrapper.clientHeight, this.view.doc.height),
phrebejk@460:         hspace = Math.max(display.sizer.clientWidth, display.lineSpace.clientWidth);
phrebejk@460:         if (pos.bottom + node.offsetHeight > vspace && pos.top > node.offsetHeight)
phrebejk@460:           top = pos.top - node.offsetHeight;
phrebejk@460:         if (left + node.offsetWidth > hspace)
phrebejk@460:           left = hspace - node.offsetWidth;
phrebejk@460:       }
phrebejk@460:       node.style.top = (top + paddingTop(display)) + "px";
phrebejk@460:       node.style.left = node.style.right = "";
phrebejk@460:       if (horiz == "right") {
phrebejk@460:         left = display.sizer.clientWidth - node.offsetWidth;
phrebejk@460:         node.style.right = "0px";
phrebejk@460:       } else {
phrebejk@460:         if (horiz == "left") left = 0;
phrebejk@460:         else if (horiz == "middle") left = (display.sizer.clientWidth - node.offsetWidth) / 2;
phrebejk@460:         node.style.left = left + "px";
phrebejk@460:       }
phrebejk@460:       if (scroll)
phrebejk@460:         scrollIntoView(this, left, top, left + node.offsetWidth, top + node.offsetHeight);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     lineCount: function() {return this.view.doc.size;},
phrebejk@460: 
phrebejk@460:     clipPos: function(pos) {return clipPos(this.view.doc, pos);},
phrebejk@460: 
phrebejk@460:     getCursor: function(start) {
phrebejk@460:       var sel = this.view.sel, pos;
phrebejk@460:       if (start == null || start == "head") pos = sel.head;
phrebejk@460:       else if (start == "anchor") pos = sel.anchor;
phrebejk@460:       else if (start == "end" || start === false) pos = sel.to;
phrebejk@460:       else pos = sel.from;
phrebejk@460:       return copyPos(pos);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     somethingSelected: function() {return !posEq(this.view.sel.from, this.view.sel.to);},
phrebejk@460: 
phrebejk@460:     setCursor: operation(null, function(line, ch, extend) {
phrebejk@460:       var pos = clipPos(this.view.doc, typeof line == "number" ? {line: line, ch: ch || 0} : line);
phrebejk@460:       if (extend) extendSelection(this, pos);
phrebejk@460:       else setSelection(this, pos, pos);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     setSelection: operation(null, function(anchor, head) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       setSelection(this, clipPos(doc, anchor), clipPos(doc, head || anchor));
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     extendSelection: operation(null, function(from, to) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       extendSelection(this, clipPos(doc, from), to && clipPos(doc, to));
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     setExtending: function(val) {this.view.sel.extend = val;},
phrebejk@460: 
phrebejk@460:     getLine: function(line) {var l = this.getLineHandle(line); return l && l.text;},
phrebejk@460: 
phrebejk@460:     getLineHandle: function(line) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       if (isLine(doc, line)) return getLine(doc, line);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     getLineNumber: function(line) {return lineNo(line);},
phrebejk@460: 
phrebejk@460:     setLine: operation(null, function(line, text) {
phrebejk@460:       if (isLine(this.view.doc, line))
phrebejk@460:         replaceRange(this, text, {line: line, ch: 0}, {line: line, ch: getLine(this.view.doc, line).text.length});
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     removeLine: operation(null, function(line) {
phrebejk@460:       if (isLine(this.view.doc, line))
phrebejk@460:         replaceRange(this, "", {line: line, ch: 0}, clipPos(this.view.doc, {line: line+1, ch: 0}));
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     replaceRange: operation(null, function(code, from, to) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       from = clipPos(doc, from);
phrebejk@460:       to = to ? clipPos(doc, to) : from;
phrebejk@460:       return replaceRange(this, code, from, to);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     getRange: function(from, to, lineSep) {
phrebejk@460:       var doc = this.view.doc;
phrebejk@460:       from = clipPos(doc, from); to = clipPos(doc, to);
phrebejk@460:       var l1 = from.line, l2 = to.line;
phrebejk@460:       if (l1 == l2) return getLine(doc, l1).text.slice(from.ch, to.ch);
phrebejk@460:       var code = [getLine(doc, l1).text.slice(from.ch)];
phrebejk@460:       doc.iter(l1 + 1, l2, function(line) { code.push(line.text); });
phrebejk@460:       code.push(getLine(doc, l2).text.slice(0, to.ch));
phrebejk@460:       return code.join(lineSep || "\n");
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     triggerOnKeyDown: operation(null, onKeyDown),
phrebejk@460: 
phrebejk@460:     execCommand: function(cmd) {return commands[cmd](this);},
phrebejk@460: 
phrebejk@460:     // Stuff used by commands, probably not much use to outside code.
phrebejk@460:     moveH: operation(null, function(dir, unit) {
phrebejk@460:       var sel = this.view.sel, pos = dir < 0 ? sel.from : sel.to;
phrebejk@460:       if (sel.shift || sel.extend || posEq(sel.from, sel.to)) pos = findPosH(this, dir, unit, true);
phrebejk@460:       extendSelection(this, pos, pos, dir);
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     deleteH: operation(null, function(dir, unit) {
phrebejk@460:       var sel = this.view.sel;
phrebejk@460:       if (!posEq(sel.from, sel.to)) replaceRange(this, "", sel.from, sel.to, "delete");
phrebejk@460:       else replaceRange(this, "", sel.from, findPosH(this, dir, unit, false), "delete");
phrebejk@460:       this.curOp.userSelChange = true;
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     moveV: operation(null, function(dir, unit) {
phrebejk@460:       var view = this.view, doc = view.doc, display = this.display;
phrebejk@460:       var cur = view.sel.head, pos = cursorCoords(this, cur, "div");
phrebejk@460:       var x = pos.left, y;
phrebejk@460:       if (view.goalColumn != null) x = view.goalColumn;
phrebejk@460:       if (unit == "page") {
phrebejk@460:         var pageSize = Math.min(display.wrapper.clientHeight, window.innerHeight || document.documentElement.clientHeight);
phrebejk@460:         y = pos.top + dir * pageSize;
phrebejk@460:       } else if (unit == "line") {
phrebejk@460:         y = dir > 0 ? pos.bottom + 3 : pos.top - 3;
phrebejk@460:       }
phrebejk@460:       do {
phrebejk@460:         var target = coordsChar(this, x, y);
phrebejk@460:         y += dir * 5;
phrebejk@460:       } while (target.outside && (dir < 0 ? y > 0 : y < doc.height));
phrebejk@460: 
phrebejk@460:       if (unit == "page") display.scrollbarV.scrollTop += charCoords(this, target, "div").top - pos.top;
phrebejk@460:       extendSelection(this, target, target, dir);
phrebejk@460:       view.goalColumn = x;
phrebejk@460:     }),
phrebejk@460: 
phrebejk@460:     toggleOverwrite: function() {
phrebejk@460:       if (this.view.overwrite = !this.view.overwrite)
phrebejk@460:         this.display.cursor.className += " CodeMirror-overwrite";
phrebejk@460:       else
phrebejk@460:         this.display.cursor.className = this.display.cursor.className.replace(" CodeMirror-overwrite", "");
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     posFromIndex: function(off) {
phrebejk@460:       var lineNo = 0, ch, doc = this.view.doc;
phrebejk@460:       doc.iter(0, doc.size, function(line) {
phrebejk@460:         var sz = line.text.length + 1;
phrebejk@460:         if (sz > off) { ch = off; return true; }
phrebejk@460:         off -= sz;
phrebejk@460:         ++lineNo;
phrebejk@460:       });
phrebejk@460:       return clipPos(doc, {line: lineNo, ch: ch});
phrebejk@460:     },
phrebejk@460:     indexFromPos: function (coords) {
phrebejk@460:       if (coords.line < 0 || coords.ch < 0) return 0;
phrebejk@460:       var index = coords.ch;
phrebejk@460:       this.view.doc.iter(0, coords.line, function (line) {
phrebejk@460:         index += line.text.length + 1;
phrebejk@460:       });
phrebejk@460:       return index;
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     scrollTo: function(x, y) {
phrebejk@460:       if (x != null) this.display.scrollbarH.scrollLeft = this.display.scroller.scrollLeft = x;
phrebejk@460:       if (y != null) this.display.scrollbarV.scrollTop = this.display.scroller.scrollTop = y;
phrebejk@460:       updateDisplay(this, []);
phrebejk@460:     },
phrebejk@460:     getScrollInfo: function() {
phrebejk@460:       var scroller = this.display.scroller, co = scrollerCutOff;
phrebejk@460:       return {left: scroller.scrollLeft, top: scroller.scrollTop,
phrebejk@460:               height: scroller.scrollHeight - co, width: scroller.scrollWidth - co,
phrebejk@460:               clientHeight: scroller.clientHeight - co, clientWidth: scroller.clientWidth - co};
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     scrollIntoView: function(pos) {
phrebejk@460:       if (typeof pos == "number") pos = {line: pos, ch: 0};
phrebejk@460:       pos = pos ? clipPos(this.view.doc, pos) : this.view.sel.head;
phrebejk@460:       scrollPosIntoView(this, pos);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     setSize: function(width, height) {
phrebejk@460:       function interpret(val) {
phrebejk@460:         return typeof val == "number" || /^\d+$/.test(String(val)) ? val + "px" : val;
phrebejk@460:       }
phrebejk@460:       if (width != null) this.display.wrapper.style.width = interpret(width);
phrebejk@460:       if (height != null) this.display.wrapper.style.height = interpret(height);
phrebejk@460:       this.refresh();
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     on: function(type, f) {on(this, type, f);},
phrebejk@460:     off: function(type, f) {off(this, type, f);},
phrebejk@460: 
phrebejk@460:     operation: function(f){return operation(this, f)();},
phrebejk@460: 
phrebejk@460:     refresh: function() {
phrebejk@460:       clearCaches(this);
phrebejk@460:       if (this.display.scroller.scrollHeight > this.view.scrollTop)
phrebejk@460:         this.display.scrollbarV.scrollTop = this.display.scroller.scrollTop = this.view.scrollTop;
phrebejk@460:       updateDisplay(this, true);
phrebejk@460:     },
phrebejk@460: 
phrebejk@460:     getInputField: function(){return this.display.input;},
phrebejk@460:     getWrapperElement: function(){return this.display.wrapper;},
phrebejk@460:     getScrollerElement: function(){return this.display.scroller;},
phrebejk@460:     getGutterElement: function(){return this.display.gutters;}
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // OPTION DEFAULTS
phrebejk@460: 
phrebejk@460:   var optionHandlers = CodeMirror.optionHandlers = {};
phrebejk@460: 
phrebejk@460:   // The default configuration options.
phrebejk@460:   var defaults = CodeMirror.defaults = {};
phrebejk@460: 
phrebejk@460:   function option(name, deflt, handle, notOnInit) {
phrebejk@460:     CodeMirror.defaults[name] = deflt;
phrebejk@460:     if (handle) optionHandlers[name] =
phrebejk@460:       notOnInit ? function(cm, val, old) {if (old != Init) handle(cm, val, old);} : handle;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var Init = CodeMirror.Init = {toString: function(){return "CodeMirror.Init";}};
phrebejk@460: 
phrebejk@460:   // These two are, on init, called from the constructor because they
phrebejk@460:   // have to be initialized before the editor can start at all.
phrebejk@460:   option("value", "", function(cm, val) {cm.setValue(val);}, true);
phrebejk@460:   option("mode", null, loadMode, true);
phrebejk@460: 
phrebejk@460:   option("indentUnit", 2, loadMode, true);
phrebejk@460:   option("indentWithTabs", false);
phrebejk@460:   option("smartIndent", true);
phrebejk@460:   option("tabSize", 4, function(cm) {
phrebejk@460:     loadMode(cm);
phrebejk@460:     clearCaches(cm);
phrebejk@460:     updateDisplay(cm, true);
phrebejk@460:   }, true);
phrebejk@460:   option("electricChars", true);
phrebejk@460: 
phrebejk@460:   option("theme", "default", function(cm) {
phrebejk@460:     themeChanged(cm);
phrebejk@460:     guttersChanged(cm);
phrebejk@460:   }, true);
phrebejk@460:   option("keyMap", "default", keyMapChanged);
phrebejk@460:   option("extraKeys", null);
phrebejk@460: 
phrebejk@460:   option("onKeyEvent", null);
phrebejk@460:   option("onDragEvent", null);
phrebejk@460: 
phrebejk@460:   option("lineWrapping", false, wrappingChanged, true);
phrebejk@460:   option("gutters", [], function(cm) {
phrebejk@460:     setGuttersForLineNumbers(cm.options);
phrebejk@460:     guttersChanged(cm);
phrebejk@460:   }, true);
phrebejk@460:   option("lineNumbers", false, function(cm) {
phrebejk@460:     setGuttersForLineNumbers(cm.options);
phrebejk@460:     guttersChanged(cm);
phrebejk@460:   }, true);
phrebejk@460:   option("firstLineNumber", 1, guttersChanged, true);
phrebejk@460:   option("lineNumberFormatter", function(integer) {return integer;}, guttersChanged, true);
phrebejk@460:   option("showCursorWhenSelecting", false, updateSelection, true);
phrebejk@460:   
phrebejk@460:   option("readOnly", false, function(cm, val) {
phrebejk@460:     if (val == "nocursor") {onBlur(cm); cm.display.input.blur();}
phrebejk@460:     else if (!val) resetInput(cm, true);
phrebejk@460:   });
phrebejk@460:   option("dragDrop", true);
phrebejk@460: 
phrebejk@460:   option("cursorBlinkRate", 530);
phrebejk@460:   option("cursorHeight", 1);
phrebejk@460:   option("workTime", 100);
phrebejk@460:   option("workDelay", 100);
phrebejk@460:   option("flattenSpans", true);
phrebejk@460:   option("pollInterval", 100);
phrebejk@460:   option("undoDepth", 40);
phrebejk@460:   option("viewportMargin", 10, function(cm){cm.refresh();}, true);
phrebejk@460: 
phrebejk@460:   option("tabindex", null, function(cm, val) {
phrebejk@460:     cm.display.input.tabIndex = val || "";
phrebejk@460:   });
phrebejk@460:   option("autofocus", null);
phrebejk@460: 
phrebejk@460:   // MODE DEFINITION AND QUERYING
phrebejk@460: 
phrebejk@460:   // Known modes, by name and by MIME
phrebejk@460:   var modes = CodeMirror.modes = {}, mimeModes = CodeMirror.mimeModes = {};
phrebejk@460: 
phrebejk@460:   CodeMirror.defineMode = function(name, mode) {
phrebejk@460:     if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;
phrebejk@460:     if (arguments.length > 2) {
phrebejk@460:       mode.dependencies = [];
phrebejk@460:       for (var i = 2; i < arguments.length; ++i) mode.dependencies.push(arguments[i]);
phrebejk@460:     }
phrebejk@460:     modes[name] = mode;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   CodeMirror.defineMIME = function(mime, spec) {
phrebejk@460:     mimeModes[mime] = spec;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   CodeMirror.resolveMode = function(spec) {
phrebejk@460:     if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))
phrebejk@460:       spec = mimeModes[spec];
phrebejk@460:     else if (typeof spec == "string" && /^[\w\-]+\/[\w\-]+\+xml$/.test(spec))
phrebejk@460:       return CodeMirror.resolveMode("application/xml");
phrebejk@460:     if (typeof spec == "string") return {name: spec};
phrebejk@460:     else return spec || {name: "null"};
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   CodeMirror.getMode = function(options, spec) {
phrebejk@460:     var spec = CodeMirror.resolveMode(spec);
phrebejk@460:     var mfactory = modes[spec.name];
phrebejk@460:     if (!mfactory) return CodeMirror.getMode(options, "text/plain");
phrebejk@460:     var modeObj = mfactory(options, spec);
phrebejk@460:     if (modeExtensions.hasOwnProperty(spec.name)) {
phrebejk@460:       var exts = modeExtensions[spec.name];
phrebejk@460:       for (var prop in exts) {
phrebejk@460:         if (!exts.hasOwnProperty(prop)) continue;
phrebejk@460:         if (modeObj.hasOwnProperty(prop)) modeObj["_" + prop] = modeObj[prop];
phrebejk@460:         modeObj[prop] = exts[prop];
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     modeObj.name = spec.name;
phrebejk@460:     return modeObj;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   CodeMirror.defineMode("null", function() {
phrebejk@460:     return {token: function(stream) {stream.skipToEnd();}};
phrebejk@460:   });
phrebejk@460:   CodeMirror.defineMIME("text/plain", "null");
phrebejk@460: 
phrebejk@460:   var modeExtensions = CodeMirror.modeExtensions = {};
phrebejk@460:   CodeMirror.extendMode = function(mode, properties) {
phrebejk@460:     var exts = modeExtensions.hasOwnProperty(mode) ? modeExtensions[mode] : (modeExtensions[mode] = {});
phrebejk@460:     for (var prop in properties) if (properties.hasOwnProperty(prop))
phrebejk@460:       exts[prop] = properties[prop];
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // EXTENSIONS
phrebejk@460: 
phrebejk@460:   CodeMirror.defineExtension = function(name, func) {
phrebejk@460:     CodeMirror.prototype[name] = func;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   CodeMirror.defineOption = option;
phrebejk@460: 
phrebejk@460:   var initHooks = [];
phrebejk@460:   CodeMirror.defineInitHook = function(f) {initHooks.push(f);};
phrebejk@460: 
phrebejk@460:   // MODE STATE HANDLING
phrebejk@460: 
phrebejk@460:   // Utility functions for working with state. Exported because modes
phrebejk@460:   // sometimes need to do this.
phrebejk@460:   function copyState(mode, state) {
phrebejk@460:     if (state === true) return state;
phrebejk@460:     if (mode.copyState) return mode.copyState(state);
phrebejk@460:     var nstate = {};
phrebejk@460:     for (var n in state) {
phrebejk@460:       var val = state[n];
phrebejk@460:       if (val instanceof Array) val = val.concat([]);
phrebejk@460:       nstate[n] = val;
phrebejk@460:     }
phrebejk@460:     return nstate;
phrebejk@460:   }
phrebejk@460:   CodeMirror.copyState = copyState;
phrebejk@460: 
phrebejk@460:   function startState(mode, a1, a2) {
phrebejk@460:     return mode.startState ? mode.startState(a1, a2) : true;
phrebejk@460:   }
phrebejk@460:   CodeMirror.startState = startState;
phrebejk@460: 
phrebejk@460:   CodeMirror.innerMode = function(mode, state) {
phrebejk@460:     while (mode.innerMode) {
phrebejk@460:       var info = mode.innerMode(state);
phrebejk@460:       state = info.state;
phrebejk@460:       mode = info.mode;
phrebejk@460:     }
phrebejk@460:     return info || {mode: mode, state: state};
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // STANDARD COMMANDS
phrebejk@460: 
phrebejk@460:   var commands = CodeMirror.commands = {
phrebejk@460:     selectAll: function(cm) {cm.setSelection({line: 0, ch: 0}, {line: cm.lineCount() - 1});},
phrebejk@460:     killLine: function(cm) {
phrebejk@460:       var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);
phrebejk@460:       if (!sel && cm.getLine(from.line).length == from.ch)
phrebejk@460:         cm.replaceRange("", from, {line: from.line + 1, ch: 0}, "delete");
phrebejk@460:       else cm.replaceRange("", from, sel ? to : {line: from.line}, "delete");
phrebejk@460:     },
phrebejk@460:     deleteLine: function(cm) {
phrebejk@460:       var l = cm.getCursor().line;
phrebejk@460:       cm.replaceRange("", {line: l, ch: 0}, {line: l}, "delete");
phrebejk@460:     },
phrebejk@460:     undo: function(cm) {cm.undo();},
phrebejk@460:     redo: function(cm) {cm.redo();},
phrebejk@460:     goDocStart: function(cm) {cm.extendSelection({line: 0, ch: 0});},
phrebejk@460:     goDocEnd: function(cm) {cm.extendSelection({line: cm.lineCount() - 1});},
phrebejk@460:     goLineStart: function(cm) {
phrebejk@460:       cm.extendSelection(lineStart(cm, cm.getCursor().line));
phrebejk@460:     },
phrebejk@460:     goLineStartSmart: function(cm) {
phrebejk@460:       var cur = cm.getCursor(), start = lineStart(cm, cur.line);
phrebejk@460:       var line = cm.getLineHandle(start.line);
phrebejk@460:       var order = getOrder(line);
phrebejk@460:       if (!order || order[0].level == 0) {
phrebejk@460:         var firstNonWS = Math.max(0, line.text.search(/\S/));
phrebejk@460:         var inWS = cur.line == start.line && cur.ch <= firstNonWS && cur.ch;
phrebejk@460:         cm.extendSelection({line: start.line, ch: inWS ? 0 : firstNonWS});
phrebejk@460:       } else cm.extendSelection(start);
phrebejk@460:     },
phrebejk@460:     goLineEnd: function(cm) {
phrebejk@460:       cm.extendSelection(lineEnd(cm, cm.getCursor().line));
phrebejk@460:     },
phrebejk@460:     goLineUp: function(cm) {cm.moveV(-1, "line");},
phrebejk@460:     goLineDown: function(cm) {cm.moveV(1, "line");},
phrebejk@460:     goPageUp: function(cm) {cm.moveV(-1, "page");},
phrebejk@460:     goPageDown: function(cm) {cm.moveV(1, "page");},
phrebejk@460:     goCharLeft: function(cm) {cm.moveH(-1, "char");},
phrebejk@460:     goCharRight: function(cm) {cm.moveH(1, "char");},
phrebejk@460:     goColumnLeft: function(cm) {cm.moveH(-1, "column");},
phrebejk@460:     goColumnRight: function(cm) {cm.moveH(1, "column");},
phrebejk@460:     goWordLeft: function(cm) {cm.moveH(-1, "word");},
phrebejk@460:     goWordRight: function(cm) {cm.moveH(1, "word");},
phrebejk@460:     delCharBefore: function(cm) {cm.deleteH(-1, "char");},
phrebejk@460:     delCharAfter: function(cm) {cm.deleteH(1, "char");},
phrebejk@460:     delWordBefore: function(cm) {cm.deleteH(-1, "word");},
phrebejk@460:     delWordAfter: function(cm) {cm.deleteH(1, "word");},
phrebejk@460:     indentAuto: function(cm) {cm.indentSelection("smart");},
phrebejk@460:     indentMore: function(cm) {cm.indentSelection("add");},
phrebejk@460:     indentLess: function(cm) {cm.indentSelection("subtract");},
phrebejk@460:     insertTab: function(cm) {cm.replaceSelection("\t", "end", "input");},
phrebejk@460:     defaultTab: function(cm) {
phrebejk@460:       if (cm.somethingSelected()) cm.indentSelection("add");
phrebejk@460:       else cm.replaceSelection("\t", "end", "input");
phrebejk@460:     },
phrebejk@460:     transposeChars: function(cm) {
phrebejk@460:       var cur = cm.getCursor(), line = cm.getLine(cur.line);
phrebejk@460:       if (cur.ch > 0 && cur.ch < line.length - 1)
phrebejk@460:         cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),
phrebejk@460:                         {line: cur.line, ch: cur.ch - 1}, {line: cur.line, ch: cur.ch + 1});
phrebejk@460:     },
phrebejk@460:     newlineAndIndent: function(cm) {
phrebejk@460:       operation(cm, function() {
phrebejk@460:         cm.replaceSelection("\n", "end", "input");
phrebejk@460:         cm.indentLine(cm.getCursor().line, null, true);
phrebejk@460:       })();
phrebejk@460:     },
phrebejk@460:     toggleOverwrite: function(cm) {cm.toggleOverwrite();}
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // STANDARD KEYMAPS
phrebejk@460: 
phrebejk@460:   var keyMap = CodeMirror.keyMap = {};
phrebejk@460:   keyMap.basic = {
phrebejk@460:     "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",
phrebejk@460:     "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",
phrebejk@460:     "Delete": "delCharAfter", "Backspace": "delCharBefore", "Tab": "defaultTab", "Shift-Tab": "indentAuto",
phrebejk@460:     "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"
phrebejk@460:   };
phrebejk@460:   // Note that the save and find-related commands aren't defined by
phrebejk@460:   // default. Unknown commands are simply ignored.
phrebejk@460:   keyMap.pcDefault = {
phrebejk@460:     "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",
phrebejk@460:     "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",
phrebejk@460:     "Ctrl-Left": "goWordLeft", "Ctrl-Right": "goWordRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",
phrebejk@460:     "Ctrl-Backspace": "delWordBefore", "Ctrl-Delete": "delWordAfter", "Ctrl-S": "save", "Ctrl-F": "find",
phrebejk@460:     "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",
phrebejk@460:     "Ctrl-[": "indentLess", "Ctrl-]": "indentMore",
phrebejk@460:     fallthrough: "basic"
phrebejk@460:   };
phrebejk@460:   keyMap.macDefault = {
phrebejk@460:     "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",
phrebejk@460:     "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goWordLeft",
phrebejk@460:     "Alt-Right": "goWordRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delWordBefore",
phrebejk@460:     "Ctrl-Alt-Backspace": "delWordAfter", "Alt-Delete": "delWordAfter", "Cmd-S": "save", "Cmd-F": "find",
phrebejk@460:     "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",
phrebejk@460:     "Cmd-[": "indentLess", "Cmd-]": "indentMore",
phrebejk@460:     fallthrough: ["basic", "emacsy"]
phrebejk@460:   };
phrebejk@460:   keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;
phrebejk@460:   keyMap.emacsy = {
phrebejk@460:     "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",
phrebejk@460:     "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",
phrebejk@460:     "Ctrl-V": "goPageDown", "Shift-Ctrl-V": "goPageUp", "Ctrl-D": "delCharAfter", "Ctrl-H": "delCharBefore",
phrebejk@460:     "Alt-D": "delWordAfter", "Alt-Backspace": "delWordBefore", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // KEYMAP DISPATCH
phrebejk@460: 
phrebejk@460:   function getKeyMap(val) {
phrebejk@460:     if (typeof val == "string") return keyMap[val];
phrebejk@460:     else return val;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lookupKey(name, maps, handle, stop) {
phrebejk@460:     function lookup(map) {
phrebejk@460:       map = getKeyMap(map);
phrebejk@460:       var found = map[name];
phrebejk@460:       if (found === false) {
phrebejk@460:         if (stop) stop();
phrebejk@460:         return true;
phrebejk@460:       }
phrebejk@460:       if (found != null && handle(found)) return true;
phrebejk@460:       if (map.nofallthrough) {
phrebejk@460:         if (stop) stop();
phrebejk@460:         return true;
phrebejk@460:       }
phrebejk@460:       var fallthrough = map.fallthrough;
phrebejk@460:       if (fallthrough == null) return false;
phrebejk@460:       if (Object.prototype.toString.call(fallthrough) != "[object Array]")
phrebejk@460:         return lookup(fallthrough);
phrebejk@460:       for (var i = 0, e = fallthrough.length; i < e; ++i) {
phrebejk@460:         if (lookup(fallthrough[i])) return true;
phrebejk@460:       }
phrebejk@460:       return false;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     for (var i = 0; i < maps.length; ++i)
phrebejk@460:       if (lookup(maps[i])) return true;
phrebejk@460:   }
phrebejk@460:   function isModifierKey(event) {
phrebejk@460:     var name = keyNames[e_prop(event, "keyCode")];
phrebejk@460:     return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";
phrebejk@460:   }
phrebejk@460:   CodeMirror.isModifierKey = isModifierKey;
phrebejk@460: 
phrebejk@460:   // FROMTEXTAREA
phrebejk@460: 
phrebejk@460:   CodeMirror.fromTextArea = function(textarea, options) {
phrebejk@460:     if (!options) options = {};
phrebejk@460:     options.value = textarea.value;
phrebejk@460:     if (!options.tabindex && textarea.tabindex)
phrebejk@460:       options.tabindex = textarea.tabindex;
phrebejk@460:     // Set autofocus to true if this textarea is focused, or if it has
phrebejk@460:     // autofocus and no other element is focused.
phrebejk@460:     if (options.autofocus == null) {
phrebejk@460:       var hasFocus = document.body;
phrebejk@460:       // doc.activeElement occasionally throws on IE
phrebejk@460:       try { hasFocus = document.activeElement; } catch(e) {}
phrebejk@460:       options.autofocus = hasFocus == textarea ||
phrebejk@460:         textarea.getAttribute("autofocus") != null && hasFocus == document.body;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     function save() {textarea.value = cm.getValue();}
phrebejk@460:     if (textarea.form) {
phrebejk@460:       // Deplorable hack to make the submit method do the right thing.
phrebejk@460:       on(textarea.form, "submit", save);
phrebejk@460:       var form = textarea.form, realSubmit = form.submit;
phrebejk@460:       try {
phrebejk@460:         form.submit = function wrappedSubmit() {
phrebejk@460:           save();
phrebejk@460:           form.submit = realSubmit;
phrebejk@460:           form.submit();
phrebejk@460:           form.submit = wrappedSubmit;
phrebejk@460:         };
phrebejk@460:       } catch(e) {}
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     textarea.style.display = "none";
phrebejk@460:     var cm = CodeMirror(function(node) {
phrebejk@460:       textarea.parentNode.insertBefore(node, textarea.nextSibling);
phrebejk@460:     }, options);
phrebejk@460:     cm.save = save;
phrebejk@460:     cm.getTextArea = function() { return textarea; };
phrebejk@460:     cm.toTextArea = function() {
phrebejk@460:       save();
phrebejk@460:       textarea.parentNode.removeChild(cm.getWrapperElement());
phrebejk@460:       textarea.style.display = "";
phrebejk@460:       if (textarea.form) {
phrebejk@460:         off(textarea.form, "submit", save);
phrebejk@460:         if (typeof textarea.form.submit == "function")
phrebejk@460:           textarea.form.submit = realSubmit;
phrebejk@460:       }
phrebejk@460:     };
phrebejk@460:     return cm;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // STRING STREAM
phrebejk@460: 
phrebejk@460:   // Fed to the mode parsers, provides helper functions to make
phrebejk@460:   // parsers more succinct.
phrebejk@460: 
phrebejk@460:   // The character stream used by a mode's parser.
phrebejk@460:   function StringStream(string, tabSize) {
phrebejk@460:     this.pos = this.start = 0;
phrebejk@460:     this.string = string;
phrebejk@460:     this.tabSize = tabSize || 8;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   StringStream.prototype = {
phrebejk@460:     eol: function() {return this.pos >= this.string.length;},
phrebejk@460:     sol: function() {return this.pos == 0;},
phrebejk@460:     peek: function() {return this.string.charAt(this.pos) || undefined;},
phrebejk@460:     next: function() {
phrebejk@460:       if (this.pos < this.string.length)
phrebejk@460:         return this.string.charAt(this.pos++);
phrebejk@460:     },
phrebejk@460:     eat: function(match) {
phrebejk@460:       var ch = this.string.charAt(this.pos);
phrebejk@460:       if (typeof match == "string") var ok = ch == match;
phrebejk@460:       else var ok = ch && (match.test ? match.test(ch) : match(ch));
phrebejk@460:       if (ok) {++this.pos; return ch;}
phrebejk@460:     },
phrebejk@460:     eatWhile: function(match) {
phrebejk@460:       var start = this.pos;
phrebejk@460:       while (this.eat(match)){}
phrebejk@460:       return this.pos > start;
phrebejk@460:     },
phrebejk@460:     eatSpace: function() {
phrebejk@460:       var start = this.pos;
phrebejk@460:       while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;
phrebejk@460:       return this.pos > start;
phrebejk@460:     },
phrebejk@460:     skipToEnd: function() {this.pos = this.string.length;},
phrebejk@460:     skipTo: function(ch) {
phrebejk@460:       var found = this.string.indexOf(ch, this.pos);
phrebejk@460:       if (found > -1) {this.pos = found; return true;}
phrebejk@460:     },
phrebejk@460:     backUp: function(n) {this.pos -= n;},
phrebejk@460:     column: function() {return countColumn(this.string, this.start, this.tabSize);},
phrebejk@460:     indentation: function() {return countColumn(this.string, null, this.tabSize);},
phrebejk@460:     match: function(pattern, consume, caseInsensitive) {
phrebejk@460:       if (typeof pattern == "string") {
phrebejk@460:         var cased = function(str) {return caseInsensitive ? str.toLowerCase() : str;};
phrebejk@460:         if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {
phrebejk@460:           if (consume !== false) this.pos += pattern.length;
phrebejk@460:           return true;
phrebejk@460:         }
phrebejk@460:       } else {
phrebejk@460:         var match = this.string.slice(this.pos).match(pattern);
phrebejk@460:         if (match && match.index > 0) return null;
phrebejk@460:         if (match && consume !== false) this.pos += match[0].length;
phrebejk@460:         return match;
phrebejk@460:       }
phrebejk@460:     },
phrebejk@460:     current: function(){return this.string.slice(this.start, this.pos);}
phrebejk@460:   };
phrebejk@460:   CodeMirror.StringStream = StringStream;
phrebejk@460: 
phrebejk@460:   // TEXTMARKERS
phrebejk@460: 
phrebejk@460:   function TextMarker(cm, type) {
phrebejk@460:     this.lines = [];
phrebejk@460:     this.type = type;
phrebejk@460:     this.cm = cm;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   TextMarker.prototype.clear = function() {
phrebejk@460:     if (this.explicitlyCleared) return;
phrebejk@460:     startOperation(this.cm);
phrebejk@460:     var min = null, max = null;
phrebejk@460:     for (var i = 0; i < this.lines.length; ++i) {
phrebejk@460:       var line = this.lines[i];
phrebejk@460:       var span = getMarkedSpanFor(line.markedSpans, this);
phrebejk@460:       if (span.to != null) max = lineNo(line);
phrebejk@460:       line.markedSpans = removeMarkedSpan(line.markedSpans, span);
phrebejk@460:       if (span.from != null)
phrebejk@460:         min = lineNo(line);
phrebejk@460:       else if (this.collapsed && !lineIsHidden(line))
phrebejk@460:         updateLineHeight(line, textHeight(this.cm.display));
phrebejk@460:     }
phrebejk@460:     if (min != null) regChange(this.cm, min, max + 1);
phrebejk@460:     this.lines.length = 0;
phrebejk@460:     this.explicitlyCleared = true;
phrebejk@460:     if (this.collapsed && this.cm.view.cantEdit) {
phrebejk@460:       this.cm.view.cantEdit = false;
phrebejk@460:       reCheckSelection(this.cm);
phrebejk@460:     }
phrebejk@460:     endOperation(this.cm);
phrebejk@460:     signalLater(this.cm, this, "clear");
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   TextMarker.prototype.find = function() {
phrebejk@460:     var from, to;
phrebejk@460:     for (var i = 0; i < this.lines.length; ++i) {
phrebejk@460:       var line = this.lines[i];
phrebejk@460:       var span = getMarkedSpanFor(line.markedSpans, this);
phrebejk@460:       if (span.from != null || span.to != null) {
phrebejk@460:         var found = lineNo(line);
phrebejk@460:         if (span.from != null) from = {line: found, ch: span.from};
phrebejk@460:         if (span.to != null) to = {line: found, ch: span.to};
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (this.type == "bookmark") return from;
phrebejk@460:     return from && {from: from, to: to};
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   function markText(cm, from, to, options, type) {
phrebejk@460:     var doc = cm.view.doc;
phrebejk@460:     var marker = new TextMarker(cm, type);
phrebejk@460:     if (type == "range" && !posLess(from, to)) return marker;
phrebejk@460:     if (options) for (var opt in options) if (options.hasOwnProperty(opt))
phrebejk@460:       marker[opt] = options[opt];
phrebejk@460:     if (marker.replacedWith) {
phrebejk@460:       marker.collapsed = true;
phrebejk@460:       marker.replacedWith = elt("span", [marker.replacedWith], "CodeMirror-widget");
phrebejk@460:     }
phrebejk@460:     if (marker.collapsed) sawCollapsedSpans = true;
phrebejk@460: 
phrebejk@460:     var curLine = from.line, size = 0, collapsedAtStart, collapsedAtEnd;
phrebejk@460:     doc.iter(curLine, to.line + 1, function(line) {
phrebejk@460:       var span = {from: null, to: null, marker: marker};
phrebejk@460:       size += line.text.length;
phrebejk@460:       if (curLine == from.line) {span.from = from.ch; size -= from.ch;}
phrebejk@460:       if (curLine == to.line) {span.to = to.ch; size -= line.text.length - to.ch;}
phrebejk@460:       if (marker.collapsed) {
phrebejk@460:         if (curLine == to.line) collapsedAtEnd = collapsedSpanAt(line, to.ch);
phrebejk@460:         if (curLine == from.line) collapsedAtStart = collapsedSpanAt(line, from.ch);
phrebejk@460:         else updateLineHeight(line, 0);
phrebejk@460:       }
phrebejk@460:       addMarkedSpan(line, span);
phrebejk@460:       if (marker.collapsed && curLine == from.line && lineIsHidden(line))
phrebejk@460:         updateLineHeight(line, 0);
phrebejk@460:       ++curLine;
phrebejk@460:     });
phrebejk@460: 
phrebejk@460:     if (marker.readOnly) {
phrebejk@460:       sawReadOnlySpans = true;
phrebejk@460:       if (cm.view.history.done.length || cm.view.history.undone.length)
phrebejk@460:         cm.clearHistory();
phrebejk@460:     }
phrebejk@460:     if (marker.collapsed) {
phrebejk@460:       if (collapsedAtStart != collapsedAtEnd)
phrebejk@460:         throw new Error("Inserting collapsed marker overlapping an existing one");
phrebejk@460:       marker.size = size;
phrebejk@460:       marker.atomic = true;
phrebejk@460:     }
phrebejk@460:     if (marker.className || marker.startStyle || marker.endStyle || marker.collapsed)
phrebejk@460:       regChange(cm, from.line, to.line + 1);
phrebejk@460:     if (marker.atomic) reCheckSelection(cm);
phrebejk@460:     return marker;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // TEXTMARKER SPANS
phrebejk@460: 
phrebejk@460:   function getMarkedSpanFor(spans, marker) {
phrebejk@460:     if (spans) for (var i = 0; i < spans.length; ++i) {
phrebejk@460:       var span = spans[i];
phrebejk@460:       if (span.marker == marker) return span;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460:   function removeMarkedSpan(spans, span) {
phrebejk@460:     for (var r, i = 0; i < spans.length; ++i)
phrebejk@460:       if (spans[i] != span) (r || (r = [])).push(spans[i]);
phrebejk@460:     return r;
phrebejk@460:   }
phrebejk@460:   function addMarkedSpan(line, span) {
phrebejk@460:     line.markedSpans = line.markedSpans ? line.markedSpans.concat([span]) : [span];
phrebejk@460:     span.marker.lines.push(line);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function markedSpansBefore(old, startCh) {
phrebejk@460:     if (old) for (var i = 0, nw; i < old.length; ++i) {
phrebejk@460:       var span = old[i], marker = span.marker;
phrebejk@460:       var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= startCh : span.from < startCh);
phrebejk@460:       if (startsBefore || marker.type == "bookmark" && span.from == startCh) {
phrebejk@460:         var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= startCh : span.to > startCh);
phrebejk@460:         (nw || (nw = [])).push({from: span.from,
phrebejk@460:                                 to: endsAfter ? null : span.to,
phrebejk@460:                                 marker: marker});
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return nw;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function markedSpansAfter(old, startCh, endCh) {
phrebejk@460:     if (old) for (var i = 0, nw; i < old.length; ++i) {
phrebejk@460:       var span = old[i], marker = span.marker;
phrebejk@460:       var endsAfter = span.to == null || (marker.inclusiveRight ? span.to >= endCh : span.to > endCh);
phrebejk@460:       if (endsAfter || marker.type == "bookmark" && span.from == endCh && span.from != startCh) {
phrebejk@460:         var startsBefore = span.from == null || (marker.inclusiveLeft ? span.from <= endCh : span.from < endCh);
phrebejk@460:         (nw || (nw = [])).push({from: startsBefore ? null : span.from - endCh,
phrebejk@460:                                 to: span.to == null ? null : span.to - endCh,
phrebejk@460:                                 marker: marker});
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return nw;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateMarkedSpans(oldFirst, oldLast, startCh, endCh, newText) {
phrebejk@460:     if (!oldFirst && !oldLast) return newText;
phrebejk@460:     // Get the spans that 'stick out' on both sides
phrebejk@460:     var first = markedSpansBefore(oldFirst, startCh);
phrebejk@460:     var last = markedSpansAfter(oldLast, startCh, endCh);
phrebejk@460: 
phrebejk@460:     // Next, merge those two ends
phrebejk@460:     var sameLine = newText.length == 1, offset = lst(newText).length + (sameLine ? startCh : 0);
phrebejk@460:     if (first) {
phrebejk@460:       // Fix up .to properties of first
phrebejk@460:       for (var i = 0; i < first.length; ++i) {
phrebejk@460:         var span = first[i];
phrebejk@460:         if (span.to == null) {
phrebejk@460:           var found = getMarkedSpanFor(last, span.marker);
phrebejk@460:           if (!found) span.to = startCh;
phrebejk@460:           else if (sameLine) span.to = found.to == null ? null : found.to + offset;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (last) {
phrebejk@460:       // Fix up .from in last (or move them into first in case of sameLine)
phrebejk@460:       for (var i = 0; i < last.length; ++i) {
phrebejk@460:         var span = last[i];
phrebejk@460:         if (span.to != null) span.to += offset;
phrebejk@460:         if (span.from == null) {
phrebejk@460:           var found = getMarkedSpanFor(first, span.marker);
phrebejk@460:           if (!found) {
phrebejk@460:             span.from = offset;
phrebejk@460:             if (sameLine) (first || (first = [])).push(span);
phrebejk@460:           }
phrebejk@460:         } else {
phrebejk@460:           span.from += offset;
phrebejk@460:           if (sameLine) (first || (first = [])).push(span);
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var newMarkers = [newHL(newText[0], first)];
phrebejk@460:     if (!sameLine) {
phrebejk@460:       // Fill gap with whole-line-spans
phrebejk@460:       var gap = newText.length - 2, gapMarkers;
phrebejk@460:       if (gap > 0 && first)
phrebejk@460:         for (var i = 0; i < first.length; ++i)
phrebejk@460:           if (first[i].to == null)
phrebejk@460:             (gapMarkers || (gapMarkers = [])).push({from: null, to: null, marker: first[i].marker});
phrebejk@460:       for (var i = 0; i < gap; ++i)
phrebejk@460:         newMarkers.push(newHL(newText[i+1], gapMarkers));
phrebejk@460:       newMarkers.push(newHL(lst(newText), last));
phrebejk@460:     }
phrebejk@460:     return newMarkers;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function removeReadOnlyRanges(doc, from, to) {
phrebejk@460:     var markers = null;
phrebejk@460:     doc.iter(from.line, to.line + 1, function(line) {
phrebejk@460:       if (line.markedSpans) for (var i = 0; i < line.markedSpans.length; ++i) {
phrebejk@460:         var mark = line.markedSpans[i].marker;
phrebejk@460:         if (mark.readOnly && (!markers || indexOf(markers, mark) == -1))
phrebejk@460:           (markers || (markers = [])).push(mark);
phrebejk@460:       }
phrebejk@460:     });
phrebejk@460:     if (!markers) return null;
phrebejk@460:     var parts = [{from: from, to: to}];
phrebejk@460:     for (var i = 0; i < markers.length; ++i) {
phrebejk@460:       var m = markers[i].find();
phrebejk@460:       for (var j = 0; j < parts.length; ++j) {
phrebejk@460:         var p = parts[j];
phrebejk@460:         if (!posLess(m.from, p.to) || posLess(m.to, p.from)) continue;
phrebejk@460:         var newParts = [j, 1];
phrebejk@460:         if (posLess(p.from, m.from)) newParts.push({from: p.from, to: m.from});
phrebejk@460:         if (posLess(m.to, p.to)) newParts.push({from: m.to, to: p.to});
phrebejk@460:         parts.splice.apply(parts, newParts);
phrebejk@460:         j += newParts.length - 1;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return parts;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function collapsedSpanAt(line, ch) {
phrebejk@460:     var sps = sawCollapsedSpans && line.markedSpans, found;
phrebejk@460:     if (sps) for (var sp, i = 0; i < sps.length; ++i) {
phrebejk@460:       sp = sps[i];
phrebejk@460:       if (!sp.marker.collapsed) continue;
phrebejk@460:       if ((sp.from == null || sp.from < ch) &&
phrebejk@460:           (sp.to == null || sp.to > ch) &&
phrebejk@460:           (!found || found.width < sp.marker.width))
phrebejk@460:         found = sp.marker;
phrebejk@460:     }
phrebejk@460:     return found;
phrebejk@460:   }
phrebejk@460:   function collapsedSpanAtStart(line) { return collapsedSpanAt(line, -1); }
phrebejk@460:   function collapsedSpanAtEnd(line) { return collapsedSpanAt(line, line.text.length + 1); }
phrebejk@460: 
phrebejk@460:   function visualLine(doc, line) {
phrebejk@460:     var merged;
phrebejk@460:     while (merged = collapsedSpanAtStart(line))
phrebejk@460:       line = getLine(doc, merged.find().from.line);
phrebejk@460:     return line;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineIsHidden(line) {
phrebejk@460:     var sps = sawCollapsedSpans && line.markedSpans;
phrebejk@460:     if (sps) for (var sp, i = 0; i < sps.length; ++i) {
phrebejk@460:       sp = sps[i];
phrebejk@460:       if (!sp.marker.collapsed) continue;
phrebejk@460:       if (sp.from == null) return true;
phrebejk@460:       if (sp.from == 0 && sp.marker.inclusiveLeft && lineIsHiddenInner(line, sp))
phrebejk@460:         return true;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460:   window.lineIsHidden = lineIsHidden;
phrebejk@460:   function lineIsHiddenInner(line, span) {
phrebejk@460:     if (span.to == null || span.marker.inclusiveRight && span.to == line.text.length)
phrebejk@460:       return true;
phrebejk@460:     for (var sp, i = 0; i < line.markedSpans.length; ++i) {
phrebejk@460:       sp = line.markedSpans[i];
phrebejk@460:       if (sp.marker.collapsed && sp.from == span.to &&
phrebejk@460:           (sp.marker.inclusiveLeft || span.marker.inclusiveRight) &&
phrebejk@460:           lineIsHiddenInner(line, sp)) return true;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // hl stands for history-line, a data structure that can be either a
phrebejk@460:   // string (line without markers) or a {text, markedSpans} object.
phrebejk@460:   function hlText(val) { return typeof val == "string" ? val : val.text; }
phrebejk@460:   function hlSpans(val) {
phrebejk@460:     if (typeof val == "string") return null;
phrebejk@460:     var spans = val.markedSpans, out = null;
phrebejk@460:     for (var i = 0; i < spans.length; ++i) {
phrebejk@460:       if (spans[i].marker.explicitlyCleared) { if (!out) out = spans.slice(0, i); }
phrebejk@460:       else if (out) out.push(spans[i]);
phrebejk@460:     }
phrebejk@460:     return !out ? spans : out.length ? out : null;
phrebejk@460:   }
phrebejk@460:   function newHL(text, spans) { return spans ? {text: text, markedSpans: spans} : text; }
phrebejk@460: 
phrebejk@460:   function detachMarkedSpans(line) {
phrebejk@460:     var spans = line.markedSpans;
phrebejk@460:     if (!spans) return;
phrebejk@460:     for (var i = 0; i < spans.length; ++i) {
phrebejk@460:       var lines = spans[i].marker.lines;
phrebejk@460:       var ix = indexOf(lines, line);
phrebejk@460:       lines.splice(ix, 1);
phrebejk@460:     }
phrebejk@460:     line.markedSpans = null;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function attachMarkedSpans(line, spans) {
phrebejk@460:     if (!spans) return;
phrebejk@460:     for (var i = 0; i < spans.length; ++i)
phrebejk@460:       spans[i].marker.lines.push(line);
phrebejk@460:     line.markedSpans = spans;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // LINE DATA STRUCTURE
phrebejk@460: 
phrebejk@460:   // Line objects. These hold state related to a line, including
phrebejk@460:   // highlighting info (the styles array).
phrebejk@460:   function makeLine(text, markedSpans, height) {
phrebejk@460:     var line = {text: text, height: height};
phrebejk@460:     attachMarkedSpans(line, markedSpans);
phrebejk@460:     if (lineIsHidden(line)) line.height = 0;
phrebejk@460:     return line;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateLine(cm, line, text, markedSpans) {
phrebejk@460:     line.text = text;
phrebejk@460:     line.stateAfter = line.styles = null;
phrebejk@460:     if (line.order != null) line.order = null;
phrebejk@460:     detachMarkedSpans(line);
phrebejk@460:     attachMarkedSpans(line, markedSpans);
phrebejk@460:     if (lineIsHidden(line)) line.height = 0;
phrebejk@460:     else if (!line.height) line.height = textHeight(cm.display);
phrebejk@460:     signalLater(cm, line, "change");
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function cleanUpLine(line) {
phrebejk@460:     line.parent = null;
phrebejk@460:     detachMarkedSpans(line);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Run the given mode's parser over a line, update the styles
phrebejk@460:   // array, which contains alternating fragments of text and CSS
phrebejk@460:   // classes.
phrebejk@460:   function highlightLine(cm, line, state) {
phrebejk@460:     var mode = cm.view.mode, flattenSpans = cm.options.flattenSpans;
phrebejk@460:     var changed = !line.styles, pos = 0, curText = "", curStyle = null;
phrebejk@460:     var stream = new StringStream(line.text, cm.options.tabSize), st = line.styles || (line.styles = []);
phrebejk@460:     if (line.text == "" && mode.blankLine) mode.blankLine(state);
phrebejk@460:     while (!stream.eol()) {
phrebejk@460:       var style = mode.token(stream, state), substr = stream.current();
phrebejk@460:       stream.start = stream.pos;
phrebejk@460:       if (!flattenSpans || curStyle != style) {
phrebejk@460:         if (curText) {
phrebejk@460:           changed = changed || pos >= st.length || curText != st[pos] || curStyle != st[pos+1];
phrebejk@460:           st[pos++] = curText; st[pos++] = curStyle;
phrebejk@460:         }
phrebejk@460:         curText = substr; curStyle = style;
phrebejk@460:       } else curText = curText + substr;
phrebejk@460:       // Give up when line is ridiculously long
phrebejk@460:       if (stream.pos > 5000) break;
phrebejk@460:     }
phrebejk@460:     if (curText) {
phrebejk@460:       changed = changed || pos >= st.length || curText != st[pos] || curStyle != st[pos+1];
phrebejk@460:       st[pos++] = curText; st[pos++] = curStyle;
phrebejk@460:     }
phrebejk@460:     if (stream.pos > 5000) { st[pos++] = line.text.slice(stream.pos); st[pos++] = null; }
phrebejk@460:     if (pos != st.length) { st.length = pos; changed = true; }
phrebejk@460:     return changed;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Lightweight form of highlight -- proceed over this line and
phrebejk@460:   // update state, but don't save a style array.
phrebejk@460:   function processLine(cm, line, state) {
phrebejk@460:     var mode = cm.view.mode;
phrebejk@460:     var stream = new StringStream(line.text, cm.options.tabSize);
phrebejk@460:     if (line.text == "" && mode.blankLine) mode.blankLine(state);
phrebejk@460:     while (!stream.eol() && stream.pos <= 5000) {
phrebejk@460:       mode.token(stream, state);
phrebejk@460:       stream.start = stream.pos;
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var styleToClassCache = {};
phrebejk@460:   function styleToClass(style) {
phrebejk@460:     if (!style) return null;
phrebejk@460:     return styleToClassCache[style] ||
phrebejk@460:       (styleToClassCache[style] = "cm-" + style.replace(/ +/g, " cm-"));
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineContent(cm, realLine, measure) {
phrebejk@460:     var merged, line = realLine, lineBefore, sawBefore, simple = true;
phrebejk@460:     while (merged = collapsedSpanAtStart(line)) {
phrebejk@460:       simple = false;
phrebejk@460:       line = getLine(cm.view.doc, merged.find().from.line);
phrebejk@460:       if (!lineBefore) lineBefore = line;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var builder = {pre: elt("pre"), col: 0, pos: 0, display: !measure,
phrebejk@460:                    measure: null, addedOne: false, cm: cm};
phrebejk@460:     if (line.textClass) builder.pre.className = line.textClass;
phrebejk@460: 
phrebejk@460:     do {
phrebejk@460:       if (!line.styles)
phrebejk@460:         highlightLine(cm, line, line.stateAfter = getStateBefore(cm, lineNo(line)));
phrebejk@460:       builder.measure = line == realLine && measure;
phrebejk@460:       builder.pos = 0;
phrebejk@460:       builder.addToken = builder.measure ? buildTokenMeasure : buildToken;
phrebejk@460:       if (measure && sawBefore && line != realLine && !builder.addedOne) {
phrebejk@460:         measure[0] = builder.pre.appendChild(zeroWidthElement(cm.display.measure));
phrebejk@460:         builder.addedOne = true;
phrebejk@460:       }
phrebejk@460:       var next = insertLineContent(line, builder);
phrebejk@460:       sawBefore = line == lineBefore;
phrebejk@460:       if (next) {
phrebejk@460:         line = getLine(cm.view.doc, next.to.line);
phrebejk@460:         simple = false;
phrebejk@460:       }
phrebejk@460:     } while (next);
phrebejk@460: 
phrebejk@460:     if (measure && !builder.addedOne)
phrebejk@460:       measure[0] = builder.pre.appendChild(simple ? elt("span", "\u00a0") : zeroWidthElement(cm.display.measure));
phrebejk@460:     if (!builder.pre.firstChild && !lineIsHidden(realLine))
phrebejk@460:       builder.pre.appendChild(document.createTextNode("\u00a0"));
phrebejk@460: 
phrebejk@460:     return builder.pre;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var tokenSpecialChars = /[\t\u0000-\u0019\u200b\u2028\u2029\uFEFF]/g;
phrebejk@460:   function buildToken(builder, text, style, startStyle, endStyle) {
phrebejk@460:     if (!text) return;
phrebejk@460:     if (!tokenSpecialChars.test(text)) {
phrebejk@460:       builder.col += text.length;
phrebejk@460:       var content = document.createTextNode(text);
phrebejk@460:     } else {
phrebejk@460:       var content = document.createDocumentFragment(), pos = 0;
phrebejk@460:       while (true) {
phrebejk@460:         tokenSpecialChars.lastIndex = pos;
phrebejk@460:         var m = tokenSpecialChars.exec(text);
phrebejk@460:         var skipped = m ? m.index - pos : text.length - pos;
phrebejk@460:         if (skipped) {
phrebejk@460:           content.appendChild(document.createTextNode(text.slice(pos, pos + skipped)));
phrebejk@460:           builder.col += skipped;
phrebejk@460:         }
phrebejk@460:         if (!m) break;
phrebejk@460:         pos += skipped + 1;
phrebejk@460:         if (m[0] == "\t") {
phrebejk@460:           var tabSize = builder.cm.options.tabSize, tabWidth = tabSize - builder.col % tabSize;
phrebejk@460:           content.appendChild(elt("span", spaceStr(tabWidth), "cm-tab"));
phrebejk@460:           builder.col += tabWidth;
phrebejk@460:         } else {
phrebejk@460:           var token = elt("span", "\u2022", "cm-invalidchar");
phrebejk@460:           token.title = "\\u" + m[0].charCodeAt(0).toString(16);
phrebejk@460:           content.appendChild(token);
phrebejk@460:           builder.col += 1;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     if (style || startStyle || endStyle || builder.measure) {
phrebejk@460:       var fullStyle = style || "";
phrebejk@460:       if (startStyle) fullStyle += startStyle;
phrebejk@460:       if (endStyle) fullStyle += endStyle;
phrebejk@460:       return builder.pre.appendChild(elt("span", [content], fullStyle));
phrebejk@460:     }
phrebejk@460:     builder.pre.appendChild(content);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function buildTokenMeasure(builder, text, style, startStyle, endStyle) {
phrebejk@460:     for (var i = 0; i < text.length; ++i) {
phrebejk@460:       if (i && i < text.length - 1 &&
phrebejk@460:           builder.cm.options.lineWrapping &&
phrebejk@460:           spanAffectsWrapping.test(text.slice(i - 1, i + 1)))
phrebejk@460:         builder.pre.appendChild(elt("wbr"));
phrebejk@460:       builder.measure[builder.pos++] =
phrebejk@460:         buildToken(builder, text.charAt(i), style,
phrebejk@460:                    i == 0 && startStyle, i == text.length - 1 && endStyle);
phrebejk@460:     }
phrebejk@460:     if (text.length) builder.addedOne = true;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function buildCollapsedSpan(builder, size, widget) {
phrebejk@460:     if (widget) {
phrebejk@460:       if (!builder.display) widget = widget.cloneNode(true);
phrebejk@460:       builder.pre.appendChild(widget);
phrebejk@460:       if (builder.measure && size) {
phrebejk@460:         builder.measure[builder.pos] = widget;
phrebejk@460:         builder.addedOne = true;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     builder.pos += size;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Outputs a number of spans to make up a line, taking highlighting
phrebejk@460:   // and marked text into account.
phrebejk@460:   function insertLineContent(line, builder) {
phrebejk@460:     var st = line.styles, spans = line.markedSpans;
phrebejk@460:     if (!spans) {
phrebejk@460:       for (var i = 0; i < st.length; i+=2)
phrebejk@460:         builder.addToken(builder, st[i], styleToClass(st[i+1]));
phrebejk@460:       return;
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var allText = line.text, len = allText.length;
phrebejk@460:     var pos = 0, i = 0, text = "", style;
phrebejk@460:     var nextChange = 0, spanStyle, spanEndStyle, spanStartStyle, collapsed;
phrebejk@460:     for (;;) {
phrebejk@460:       if (nextChange == pos) { // Update current marker set
phrebejk@460:         spanStyle = spanEndStyle = spanStartStyle = "";
phrebejk@460:         collapsed = null; nextChange = Infinity;
phrebejk@460:         var foundBookmark = null;
phrebejk@460:         for (var j = 0; j < spans.length; ++j) {
phrebejk@460:           var sp = spans[j], m = sp.marker;
phrebejk@460:           if (sp.from <= pos && (sp.to == null || sp.to > pos)) {
phrebejk@460:             if (sp.to != null && nextChange > sp.to) { nextChange = sp.to; spanEndStyle = ""; }
phrebejk@460:             if (m.className) spanStyle += " " + m.className;
phrebejk@460:             if (m.startStyle && sp.from == pos) spanStartStyle += " " + m.startStyle;
phrebejk@460:             if (m.endStyle && sp.to == nextChange) spanEndStyle += " " + m.endStyle;
phrebejk@460:             if (m.collapsed && (!collapsed || collapsed.marker.width < m.width))
phrebejk@460:               collapsed = sp;
phrebejk@460:           } else if (sp.from > pos && nextChange > sp.from) {
phrebejk@460:             nextChange = sp.from;
phrebejk@460:           }
phrebejk@460:           if (m.type == "bookmark" && sp.from == pos && m.replacedWith)
phrebejk@460:             foundBookmark = m.replacedWith;
phrebejk@460:         }
phrebejk@460:         if (collapsed && (collapsed.from || 0) == pos) {
phrebejk@460:           buildCollapsedSpan(builder, (collapsed.to == null ? len : collapsed.to) - pos,
phrebejk@460:                              collapsed.from != null && collapsed.marker.replacedWith);
phrebejk@460:           if (collapsed.to == null) return collapsed.marker.find();
phrebejk@460:         }
phrebejk@460:         if (foundBookmark && !collapsed) buildCollapsedSpan(builder, 0, foundBookmark);
phrebejk@460:       }
phrebejk@460:       if (pos >= len) break;
phrebejk@460: 
phrebejk@460:       var upto = Math.min(len, nextChange);
phrebejk@460:       while (true) {
phrebejk@460:         if (text) {
phrebejk@460:           var end = pos + text.length;
phrebejk@460:           if (!collapsed) {
phrebejk@460:             var tokenText = end > upto ? text.slice(0, upto - pos) : text;
phrebejk@460:             builder.addToken(builder, tokenText, style + spanStyle,
phrebejk@460:                              spanStartStyle, pos + tokenText.length == nextChange ? spanEndStyle : "");
phrebejk@460:           }
phrebejk@460:           if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}
phrebejk@460:           pos = end;
phrebejk@460:           spanStartStyle = "";
phrebejk@460:         }
phrebejk@460:         text = st[i++]; style = styleToClass(st[i++]);
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // DOCUMENT DATA STRUCTURE
phrebejk@460: 
phrebejk@460:   function LeafChunk(lines) {
phrebejk@460:     this.lines = lines;
phrebejk@460:     this.parent = null;
phrebejk@460:     for (var i = 0, e = lines.length, height = 0; i < e; ++i) {
phrebejk@460:       lines[i].parent = this;
phrebejk@460:       height += lines[i].height;
phrebejk@460:     }
phrebejk@460:     this.height = height;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   LeafChunk.prototype = {
phrebejk@460:     chunkSize: function() { return this.lines.length; },
phrebejk@460:     remove: function(at, n, cm) {
phrebejk@460:       for (var i = at, e = at + n; i < e; ++i) {
phrebejk@460:         var line = this.lines[i];
phrebejk@460:         this.height -= line.height;
phrebejk@460:         cleanUpLine(line);
phrebejk@460:         signalLater(cm, line, "delete");
phrebejk@460:       }
phrebejk@460:       this.lines.splice(at, n);
phrebejk@460:     },
phrebejk@460:     collapse: function(lines) {
phrebejk@460:       lines.splice.apply(lines, [lines.length, 0].concat(this.lines));
phrebejk@460:     },
phrebejk@460:     insertHeight: function(at, lines, height) {
phrebejk@460:       this.height += height;
phrebejk@460:       this.lines = this.lines.slice(0, at).concat(lines).concat(this.lines.slice(at));
phrebejk@460:       for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;
phrebejk@460:     },
phrebejk@460:     iterN: function(at, n, op) {
phrebejk@460:       for (var e = at + n; at < e; ++at)
phrebejk@460:         if (op(this.lines[at])) return true;
phrebejk@460:     }
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   function BranchChunk(children) {
phrebejk@460:     this.children = children;
phrebejk@460:     var size = 0, height = 0;
phrebejk@460:     for (var i = 0, e = children.length; i < e; ++i) {
phrebejk@460:       var ch = children[i];
phrebejk@460:       size += ch.chunkSize(); height += ch.height;
phrebejk@460:       ch.parent = this;
phrebejk@460:     }
phrebejk@460:     this.size = size;
phrebejk@460:     this.height = height;
phrebejk@460:     this.parent = null;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   BranchChunk.prototype = {
phrebejk@460:     chunkSize: function() { return this.size; },
phrebejk@460:     remove: function(at, n, callbacks) {
phrebejk@460:       this.size -= n;
phrebejk@460:       for (var i = 0; i < this.children.length; ++i) {
phrebejk@460:         var child = this.children[i], sz = child.chunkSize();
phrebejk@460:         if (at < sz) {
phrebejk@460:           var rm = Math.min(n, sz - at), oldHeight = child.height;
phrebejk@460:           child.remove(at, rm, callbacks);
phrebejk@460:           this.height -= oldHeight - child.height;
phrebejk@460:           if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }
phrebejk@460:           if ((n -= rm) == 0) break;
phrebejk@460:           at = 0;
phrebejk@460:         } else at -= sz;
phrebejk@460:       }
phrebejk@460:       if (this.size - n < 25) {
phrebejk@460:         var lines = [];
phrebejk@460:         this.collapse(lines);
phrebejk@460:         this.children = [new LeafChunk(lines)];
phrebejk@460:         this.children[0].parent = this;
phrebejk@460:       }
phrebejk@460:     },
phrebejk@460:     collapse: function(lines) {
phrebejk@460:       for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);
phrebejk@460:     },
phrebejk@460:     insert: function(at, lines) {
phrebejk@460:       var height = 0;
phrebejk@460:       for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;
phrebejk@460:       this.insertHeight(at, lines, height);
phrebejk@460:     },
phrebejk@460:     insertHeight: function(at, lines, height) {
phrebejk@460:       this.size += lines.length;
phrebejk@460:       this.height += height;
phrebejk@460:       for (var i = 0, e = this.children.length; i < e; ++i) {
phrebejk@460:         var child = this.children[i], sz = child.chunkSize();
phrebejk@460:         if (at <= sz) {
phrebejk@460:           child.insertHeight(at, lines, height);
phrebejk@460:           if (child.lines && child.lines.length > 50) {
phrebejk@460:             while (child.lines.length > 50) {
phrebejk@460:               var spilled = child.lines.splice(child.lines.length - 25, 25);
phrebejk@460:               var newleaf = new LeafChunk(spilled);
phrebejk@460:               child.height -= newleaf.height;
phrebejk@460:               this.children.splice(i + 1, 0, newleaf);
phrebejk@460:               newleaf.parent = this;
phrebejk@460:             }
phrebejk@460:             this.maybeSpill();
phrebejk@460:           }
phrebejk@460:           break;
phrebejk@460:         }
phrebejk@460:         at -= sz;
phrebejk@460:       }
phrebejk@460:     },
phrebejk@460:     maybeSpill: function() {
phrebejk@460:       if (this.children.length <= 10) return;
phrebejk@460:       var me = this;
phrebejk@460:       do {
phrebejk@460:         var spilled = me.children.splice(me.children.length - 5, 5);
phrebejk@460:         var sibling = new BranchChunk(spilled);
phrebejk@460:         if (!me.parent) { // Become the parent node
phrebejk@460:           var copy = new BranchChunk(me.children);
phrebejk@460:           copy.parent = me;
phrebejk@460:           me.children = [copy, sibling];
phrebejk@460:           me = copy;
phrebejk@460:         } else {
phrebejk@460:           me.size -= sibling.size;
phrebejk@460:           me.height -= sibling.height;
phrebejk@460:           var myIndex = indexOf(me.parent.children, me);
phrebejk@460:           me.parent.children.splice(myIndex + 1, 0, sibling);
phrebejk@460:         }
phrebejk@460:         sibling.parent = me.parent;
phrebejk@460:       } while (me.children.length > 10);
phrebejk@460:       me.parent.maybeSpill();
phrebejk@460:     },
phrebejk@460:     iter: function(from, to, op) { this.iterN(from, to - from, op); },
phrebejk@460:     iterN: function(at, n, op) {
phrebejk@460:       for (var i = 0, e = this.children.length; i < e; ++i) {
phrebejk@460:         var child = this.children[i], sz = child.chunkSize();
phrebejk@460:         if (at < sz) {
phrebejk@460:           var used = Math.min(n, sz - at);
phrebejk@460:           if (child.iterN(at, used, op)) return true;
phrebejk@460:           if ((n -= used) == 0) break;
phrebejk@460:           at = 0;
phrebejk@460:         } else at -= sz;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   // LINE UTILITIES
phrebejk@460: 
phrebejk@460:   function getLine(chunk, n) {
phrebejk@460:     while (!chunk.lines) {
phrebejk@460:       for (var i = 0;; ++i) {
phrebejk@460:         var child = chunk.children[i], sz = child.chunkSize();
phrebejk@460:         if (n < sz) { chunk = child; break; }
phrebejk@460:         n -= sz;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return chunk.lines[n];
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function updateLineHeight(line, height) {
phrebejk@460:     var diff = height - line.height;
phrebejk@460:     for (var n = line; n; n = n.parent) n.height += diff;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineNo(line) {
phrebejk@460:     if (line.parent == null) return null;
phrebejk@460:     var cur = line.parent, no = indexOf(cur.lines, line);
phrebejk@460:     for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {
phrebejk@460:       for (var i = 0;; ++i) {
phrebejk@460:         if (chunk.children[i] == cur) break;
phrebejk@460:         no += chunk.children[i].chunkSize();
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return no;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineAtHeight(chunk, h) {
phrebejk@460:     var n = 0;
phrebejk@460:     outer: do {
phrebejk@460:       for (var i = 0, e = chunk.children.length; i < e; ++i) {
phrebejk@460:         var child = chunk.children[i], ch = child.height;
phrebejk@460:         if (h < ch) { chunk = child; continue outer; }
phrebejk@460:         h -= ch;
phrebejk@460:         n += child.chunkSize();
phrebejk@460:       }
phrebejk@460:       return n;
phrebejk@460:     } while (!chunk.lines);
phrebejk@460:     for (var i = 0, e = chunk.lines.length; i < e; ++i) {
phrebejk@460:       var line = chunk.lines[i], lh = line.height;
phrebejk@460:       if (h < lh) break;
phrebejk@460:       h -= lh;
phrebejk@460:     }
phrebejk@460:     return n + i;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function heightAtLine(cm, lineObj) {
phrebejk@460:     lineObj = visualLine(cm.view.doc, lineObj);
phrebejk@460: 
phrebejk@460:     var h = 0, chunk = lineObj.parent;
phrebejk@460:     for (var i = 0; i < chunk.lines.length; ++i) {
phrebejk@460:       var line = chunk.lines[i];
phrebejk@460:       if (line == lineObj) break;
phrebejk@460:       else h += line.height;
phrebejk@460:     }
phrebejk@460:     for (var p = chunk.parent; p; chunk = p, p = chunk.parent) {
phrebejk@460:       for (var i = 0; i < p.children.length; ++i) {
phrebejk@460:         var cur = p.children[i];
phrebejk@460:         if (cur == chunk) break;
phrebejk@460:         else h += cur.height;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return h;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function getOrder(line) {
phrebejk@460:     var order = line.order;
phrebejk@460:     if (order == null) order = line.order = bidiOrdering(line.text);
phrebejk@460:     return order;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // HISTORY
phrebejk@460: 
phrebejk@460:   function makeHistory() {
phrebejk@460:     return {
phrebejk@460:       // Arrays of history events. Doing something adds an event to
phrebejk@460:       // done and clears undo. Undoing moves events from done to
phrebejk@460:       // undone, redoing moves them in the other direction.
phrebejk@460:       done: [], undone: [],
phrebejk@460:       // Used to track when changes can be merged into a single undo
phrebejk@460:       // event
phrebejk@460:       lastTime: 0, lastOp: null, lastOrigin: null,
phrebejk@460:       // Used by the isClean() method
phrebejk@460:       dirtyCounter: 0
phrebejk@460:     };
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function addChange(cm, start, added, old, origin, fromBefore, toBefore, fromAfter, toAfter) {
phrebejk@460:     var history = cm.view.history;
phrebejk@460:     history.undone.length = 0;
phrebejk@460:     var time = +new Date, cur = lst(history.done);
phrebejk@460:     
phrebejk@460:     if (cur &&
phrebejk@460:         (history.lastOp == cm.curOp.id ||
phrebejk@460:          history.lastOrigin == origin && (origin == "input" || origin == "delete") &&
phrebejk@460:          history.lastTime > time - 600)) {
phrebejk@460:       // Merge this change into the last event
phrebejk@460:       var last = lst(cur.events);
phrebejk@460:       if (last.start > start + old.length || last.start + last.added < start) {
phrebejk@460:         // Doesn't intersect with last sub-event, add new sub-event
phrebejk@460:         cur.events.push({start: start, added: added, old: old});
phrebejk@460:       } else {
phrebejk@460:         // Patch up the last sub-event
phrebejk@460:         var startBefore = Math.max(0, last.start - start),
phrebejk@460:         endAfter = Math.max(0, (start + old.length) - (last.start + last.added));
phrebejk@460:         for (var i = startBefore; i > 0; --i) last.old.unshift(old[i - 1]);
phrebejk@460:         for (var i = endAfter; i > 0; --i) last.old.push(old[old.length - i]);
phrebejk@460:         if (startBefore) last.start = start;
phrebejk@460:         last.added += added - (old.length - startBefore - endAfter);
phrebejk@460:       }
phrebejk@460:       cur.fromAfter = fromAfter; cur.toAfter = toAfter;
phrebejk@460:     } else {
phrebejk@460:       // Can not be merged, start a new event.
phrebejk@460:       cur = {events: [{start: start, added: added, old: old}],
phrebejk@460:              fromBefore: fromBefore, toBefore: toBefore, fromAfter: fromAfter, toAfter: toAfter};
phrebejk@460:       history.done.push(cur);
phrebejk@460:       while (history.done.length > cm.options.undoDepth)
phrebejk@460:         history.done.shift();
phrebejk@460:       if (history.dirtyCounter < 0)
phrebejk@460:           // The user has made a change after undoing past the last clean state. 
phrebejk@460:           // We can never get back to a clean state now until markClean() is called.
phrebejk@460:           history.dirtyCounter = NaN;
phrebejk@460:       else
phrebejk@460:         history.dirtyCounter++;
phrebejk@460:     }
phrebejk@460:     history.lastTime = time;
phrebejk@460:     history.lastOp = cm.curOp.id;
phrebejk@460:     history.lastOrigin = origin;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // EVENT OPERATORS
phrebejk@460: 
phrebejk@460:   function stopMethod() {e_stop(this);}
phrebejk@460:   // Ensure an event has a stop method.
phrebejk@460:   function addStop(event) {
phrebejk@460:     if (!event.stop) event.stop = stopMethod;
phrebejk@460:     return event;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function e_preventDefault(e) {
phrebejk@460:     if (e.preventDefault) e.preventDefault();
phrebejk@460:     else e.returnValue = false;
phrebejk@460:   }
phrebejk@460:   function e_stopPropagation(e) {
phrebejk@460:     if (e.stopPropagation) e.stopPropagation();
phrebejk@460:     else e.cancelBubble = true;
phrebejk@460:   }
phrebejk@460:   function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}
phrebejk@460:   CodeMirror.e_stop = e_stop;
phrebejk@460:   CodeMirror.e_preventDefault = e_preventDefault;
phrebejk@460:   CodeMirror.e_stopPropagation = e_stopPropagation;
phrebejk@460: 
phrebejk@460:   function e_target(e) {return e.target || e.srcElement;}
phrebejk@460:   function e_button(e) {
phrebejk@460:     var b = e.which;
phrebejk@460:     if (b == null) {
phrebejk@460:       if (e.button & 1) b = 1;
phrebejk@460:       else if (e.button & 2) b = 3;
phrebejk@460:       else if (e.button & 4) b = 2;
phrebejk@460:     }
phrebejk@460:     if (mac && e.ctrlKey && b == 1) b = 3;
phrebejk@460:     return b;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Allow 3rd-party code to override event properties by adding an override
phrebejk@460:   // object to an event object.
phrebejk@460:   function e_prop(e, prop) {
phrebejk@460:     var overridden = e.override && e.override.hasOwnProperty(prop);
phrebejk@460:     return overridden ? e.override[prop] : e[prop];
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // EVENT HANDLING
phrebejk@460: 
phrebejk@460:   function on(emitter, type, f) {
phrebejk@460:     if (emitter.addEventListener)
phrebejk@460:       emitter.addEventListener(type, f, false);
phrebejk@460:     else if (emitter.attachEvent)
phrebejk@460:       emitter.attachEvent("on" + type, f);
phrebejk@460:     else {
phrebejk@460:       var map = emitter._handlers || (emitter._handlers = {});
phrebejk@460:       var arr = map[type] || (map[type] = []);
phrebejk@460:       arr.push(f);
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function off(emitter, type, f) {
phrebejk@460:     if (emitter.removeEventListener)
phrebejk@460:       emitter.removeEventListener(type, f, false);
phrebejk@460:     else if (emitter.detachEvent)
phrebejk@460:       emitter.detachEvent("on" + type, f);
phrebejk@460:     else {
phrebejk@460:       var arr = emitter._handlers && emitter._handlers[type];
phrebejk@460:       if (!arr) return;
phrebejk@460:       for (var i = 0; i < arr.length; ++i)
phrebejk@460:         if (arr[i] == f) { arr.splice(i, 1); break; }
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function signal(emitter, type /*, values...*/) {
phrebejk@460:     var arr = emitter._handlers && emitter._handlers[type];
phrebejk@460:     if (!arr) return;
phrebejk@460:     var args = Array.prototype.slice.call(arguments, 2);
phrebejk@460:     for (var i = 0; i < arr.length; ++i) arr[i].apply(null, args);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function signalLater(cm, emitter, type /*, values...*/) {
phrebejk@460:     var arr = emitter._handlers && emitter._handlers[type];
phrebejk@460:     if (!arr) return;
phrebejk@460:     var args = Array.prototype.slice.call(arguments, 3), flist = cm.curOp && cm.curOp.delayedCallbacks;
phrebejk@460:     function bnd(f) {return function(){f.apply(null, args);};};
phrebejk@460:     for (var i = 0; i < arr.length; ++i)
phrebejk@460:       if (flist) flist.push(bnd(arr[i]));
phrebejk@460:       else arr[i].apply(null, args);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function hasHandler(emitter, type) {
phrebejk@460:     var arr = emitter._handlers && emitter._handlers[type];
phrebejk@460:     return arr && arr.length > 0;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   CodeMirror.on = on; CodeMirror.off = off; CodeMirror.signal = signal;
phrebejk@460: 
phrebejk@460:   // MISC UTILITIES
phrebejk@460: 
phrebejk@460:   // Number of pixels added to scroller and sizer to hide scrollbar
phrebejk@460:   var scrollerCutOff = 30;
phrebejk@460: 
phrebejk@460:   // Returned or thrown by various protocols to signal 'I'm not
phrebejk@460:   // handling this'.
phrebejk@460:   var Pass = CodeMirror.Pass = {toString: function(){return "CodeMirror.Pass";}};
phrebejk@460: 
phrebejk@460:   function Delayed() {this.id = null;}
phrebejk@460:   Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};
phrebejk@460: 
phrebejk@460:   // Counts the column offset in a string, taking tabs into account.
phrebejk@460:   // Used mostly to find indentation.
phrebejk@460:   function countColumn(string, end, tabSize) {
phrebejk@460:     if (end == null) {
phrebejk@460:       end = string.search(/[^\s\u00a0]/);
phrebejk@460:       if (end == -1) end = string.length;
phrebejk@460:     }
phrebejk@460:     for (var i = 0, n = 0; i < end; ++i) {
phrebejk@460:       if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);
phrebejk@460:       else ++n;
phrebejk@460:     }
phrebejk@460:     return n;
phrebejk@460:   }
phrebejk@460:   CodeMirror.countColumn = countColumn;
phrebejk@460: 
phrebejk@460:   var spaceStrs = [""];
phrebejk@460:   function spaceStr(n) {
phrebejk@460:     while (spaceStrs.length <= n)
phrebejk@460:       spaceStrs.push(lst(spaceStrs) + " ");
phrebejk@460:     return spaceStrs[n];
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lst(arr) { return arr[arr.length-1]; }
phrebejk@460: 
phrebejk@460:   function selectInput(node) {
phrebejk@460:     if (ios) { // Mobile Safari apparently has a bug where select() is broken.
phrebejk@460:       node.selectionStart = 0;
phrebejk@460:       node.selectionEnd = node.value.length;
phrebejk@460:     } else node.select();
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function indexOf(collection, elt) {
phrebejk@460:     if (collection.indexOf) return collection.indexOf(elt);
phrebejk@460:     for (var i = 0, e = collection.length; i < e; ++i)
phrebejk@460:       if (collection[i] == elt) return i;
phrebejk@460:     return -1;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function emptyArray(size) {
phrebejk@460:     for (var a = [], i = 0; i < size; ++i) a.push(undefined);
phrebejk@460:     return a;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function bind(f) {
phrebejk@460:     var args = Array.prototype.slice.call(arguments, 1);
phrebejk@460:     return function(){return f.apply(null, args);};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var nonASCIISingleCaseWordChar = /[\u3040-\u309f\u30a0-\u30ff\u3400-\u4db5\u4e00-\u9fcc]/;
phrebejk@460:   function isWordChar(ch) {
phrebejk@460:     return /\w/.test(ch) || ch > "\x80" &&
phrebejk@460:       (ch.toUpperCase() != ch.toLowerCase() || nonASCIISingleCaseWordChar.test(ch));
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function isEmpty(obj) {
phrebejk@460:     var c = 0;
phrebejk@460:     for (var n in obj) if (obj.hasOwnProperty(n) && obj[n]) ++c;
phrebejk@460:     return !c;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var isExtendingChar = /[\u0300-\u036F\u0483-\u0487\u0488-\u0489\u0591-\u05BD\u05BF\u05C1-\u05C2\u05C4-\u05C5\u05C7\u0610-\u061A\u064B-\u065F\u0670\u06D6-\u06DC\u06DF-\u06E4\u06E7-\u06E8\u06EA-\u06ED\uA66F\uA670-\uA672\uA674-\uA67D\uA69F]/;
phrebejk@460: 
phrebejk@460:   // DOM UTILITIES
phrebejk@460: 
phrebejk@460:   function elt(tag, content, className, style) {
phrebejk@460:     var e = document.createElement(tag);
phrebejk@460:     if (className) e.className = className;
phrebejk@460:     if (style) e.style.cssText = style;
phrebejk@460:     if (typeof content == "string") setTextContent(e, content);
phrebejk@460:     else if (content) for (var i = 0; i < content.length; ++i) e.appendChild(content[i]);
phrebejk@460:     return e;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function removeChildren(e) {
phrebejk@460:     e.innerHTML = "";
phrebejk@460:     return e;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function removeChildrenAndAdd(parent, e) {
phrebejk@460:     return removeChildren(parent).appendChild(e);
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function setTextContent(e, str) {
phrebejk@460:     if (ie_lt9) {
phrebejk@460:       e.innerHTML = "";
phrebejk@460:       e.appendChild(document.createTextNode(str));
phrebejk@460:     } else e.textContent = str;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // FEATURE DETECTION
phrebejk@460: 
phrebejk@460:   // Detect drag-and-drop
phrebejk@460:   var dragAndDrop = function() {
phrebejk@460:     // There is *some* kind of drag-and-drop support in IE6-8, but I
phrebejk@460:     // couldn't get it to work yet.
phrebejk@460:     if (ie_lt9) return false;
phrebejk@460:     var div = elt('div');
phrebejk@460:     return "draggable" in div || "dragDrop" in div;
phrebejk@460:   }();
phrebejk@460: 
phrebejk@460:   // For a reason I have yet to figure out, some browsers disallow
phrebejk@460:   // word wrapping between certain characters *only* if a new inline
phrebejk@460:   // element is started between them. This makes it hard to reliably
phrebejk@460:   // measure the position of things, since that requires inserting an
phrebejk@460:   // extra span. This terribly fragile set of regexps matches the
phrebejk@460:   // character combinations that suffer from this phenomenon on the
phrebejk@460:   // various browsers.
phrebejk@460:   var spanAffectsWrapping = /^$/; // Won't match any two-character string
phrebejk@460:   if (gecko) spanAffectsWrapping = /$'/;
phrebejk@460:   else if (safari) spanAffectsWrapping = /\-[^ \-?]|\?[^ !'\"\),.\-\/:;\?\]\}]/;
phrebejk@460:   else if (chrome) spanAffectsWrapping = /\-[^ \-\.?]|\?[^ \-\.?\]\}:;!'\"\),\/]|[\.!\"#&%\)*+,:;=>\]|\}~][\(\{\[<]|\$'/;
phrebejk@460: 
phrebejk@460:   var knownScrollbarWidth;
phrebejk@460:   function scrollbarWidth(measure) {
phrebejk@460:     if (knownScrollbarWidth != null) return knownScrollbarWidth;
phrebejk@460:     var test = elt("div", null, null, "width: 50px; height: 50px; overflow-x: scroll");
phrebejk@460:     removeChildrenAndAdd(measure, test);
phrebejk@460:     if (test.offsetWidth)
phrebejk@460:       knownScrollbarWidth = test.offsetHeight - test.clientHeight;
phrebejk@460:     return knownScrollbarWidth || 0;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   var zwspSupported;
phrebejk@460:   function zeroWidthElement(measure) {
phrebejk@460:     if (zwspSupported == null) {
phrebejk@460:       var test = elt("span", "\u200b");
phrebejk@460:       removeChildrenAndAdd(measure, elt("span", [test, document.createTextNode("x")]));
phrebejk@460:       if (measure.firstChild.offsetHeight != 0)
phrebejk@460:         zwspSupported = test.offsetWidth <= 1 && test.offsetHeight > 2 && !ie_lt8;
phrebejk@460:     }
phrebejk@460:     if (zwspSupported) return elt("span", "\u200b");
phrebejk@460:     else return elt("span", "\u00a0", null, "display: inline-block; width: 1px; margin-right: -1px");
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // See if "".split is the broken IE version, if so, provide an
phrebejk@460:   // alternative way to split lines.
phrebejk@460:   var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {
phrebejk@460:     var pos = 0, result = [], l = string.length;
phrebejk@460:     while (pos <= l) {
phrebejk@460:       var nl = string.indexOf("\n", pos);
phrebejk@460:       if (nl == -1) nl = string.length;
phrebejk@460:       var line = string.slice(pos, string.charAt(nl - 1) == "\r" ? nl - 1 : nl);
phrebejk@460:       var rt = line.indexOf("\r");
phrebejk@460:       if (rt != -1) {
phrebejk@460:         result.push(line.slice(0, rt));
phrebejk@460:         pos += rt + 1;
phrebejk@460:       } else {
phrebejk@460:         result.push(line);
phrebejk@460:         pos = nl + 1;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460:     return result;
phrebejk@460:   } : function(string){return string.split(/\r\n?|\n/);};
phrebejk@460:   CodeMirror.splitLines = splitLines;
phrebejk@460: 
phrebejk@460:   var hasSelection = window.getSelection ? function(te) {
phrebejk@460:     try { return te.selectionStart != te.selectionEnd; }
phrebejk@460:     catch(e) { return false; }
phrebejk@460:   } : function(te) {
phrebejk@460:     try {var range = te.ownerDocument.selection.createRange();}
phrebejk@460:     catch(e) {}
phrebejk@460:     if (!range || range.parentElement() != te) return false;
phrebejk@460:     return range.compareEndPoints("StartToEnd", range) != 0;
phrebejk@460:   };
phrebejk@460: 
phrebejk@460:   var hasCopyEvent = (function() {
phrebejk@460:     var e = elt("div");
phrebejk@460:     if ("oncopy" in e) return true;
phrebejk@460:     e.setAttribute("oncopy", "return;");
phrebejk@460:     return typeof e.oncopy == 'function';
phrebejk@460:   })();
phrebejk@460: 
phrebejk@460:   // KEY NAMING
phrebejk@460: 
phrebejk@460:   var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",
phrebejk@460:                   19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",
phrebejk@460:                   36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",
phrebejk@460:                   46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 109: "-", 107: "=", 127: "Delete",
phrebejk@460:                   186: ";", 187: "=", 188: ",", 189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\",
phrebejk@460:                   221: "]", 222: "'", 63276: "PageUp", 63277: "PageDown", 63275: "End", 63273: "Home",
phrebejk@460:                   63234: "Left", 63232: "Up", 63235: "Right", 63233: "Down", 63302: "Insert", 63272: "Delete"};
phrebejk@460:   CodeMirror.keyNames = keyNames;
phrebejk@460:   (function() {
phrebejk@460:     // Number keys
phrebejk@460:     for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i);
phrebejk@460:     // Alphabetic keys
phrebejk@460:     for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);
phrebejk@460:     // Function keys
phrebejk@460:     for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;
phrebejk@460:   })();
phrebejk@460: 
phrebejk@460:   // BIDI HELPERS
phrebejk@460: 
phrebejk@460:   function iterateBidiSections(order, from, to, f) {
phrebejk@460:     if (!order) return f(from, to, "ltr");
phrebejk@460:     for (var i = 0; i < order.length; ++i) {
phrebejk@460:       var part = order[i];
phrebejk@460:       if (part.from < to && part.to > from)
phrebejk@460:         f(Math.max(part.from, from), Math.min(part.to, to), part.level == 1 ? "rtl" : "ltr");
phrebejk@460:     }
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function bidiLeft(part) { return part.level % 2 ? part.to : part.from; }
phrebejk@460:   function bidiRight(part) { return part.level % 2 ? part.from : part.to; }
phrebejk@460: 
phrebejk@460:   function lineLeft(line) { var order = getOrder(line); return order ? bidiLeft(order[0]) : 0; }
phrebejk@460:   function lineRight(line) {
phrebejk@460:     var order = getOrder(line);
phrebejk@460:     if (!order) return line.text.length;
phrebejk@460:     return bidiRight(lst(order));
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function lineStart(cm, lineN) {
phrebejk@460:     var line = getLine(cm.view.doc, lineN);
phrebejk@460:     var visual = visualLine(cm.view.doc, line);
phrebejk@460:     if (visual != line) lineN = lineNo(visual);
phrebejk@460:     var order = getOrder(visual);
phrebejk@460:     var ch = !order ? 0 : order[0].level % 2 ? lineRight(visual) : lineLeft(visual);
phrebejk@460:     return {line: lineN, ch: ch};
phrebejk@460:   }
phrebejk@460:   function lineEnd(cm, lineNo) {
phrebejk@460:     var merged, line;
phrebejk@460:     while (merged = collapsedSpanAtEnd(line = getLine(cm.view.doc, lineNo)))
phrebejk@460:       lineNo = merged.find().to.line;
phrebejk@460:     var order = getOrder(line);
phrebejk@460:     var ch = !order ? line.text.length : order[0].level % 2 ? lineLeft(line) : lineRight(line);
phrebejk@460:     return {line: lineNo, ch: ch};
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // This is somewhat involved. It is needed in order to move
phrebejk@460:   // 'visually' through bi-directional text -- i.e., pressing left
phrebejk@460:   // should make the cursor go left, even when in RTL text. The
phrebejk@460:   // tricky part is the 'jumps', where RTL and LTR text touch each
phrebejk@460:   // other. This often requires the cursor offset to move more than
phrebejk@460:   // one unit, in order to visually move one unit.
phrebejk@460:   function moveVisually(line, start, dir, byUnit) {
phrebejk@460:     var bidi = getOrder(line);
phrebejk@460:     if (!bidi) return moveLogically(line, start, dir, byUnit);
phrebejk@460:     var moveOneUnit = byUnit ? function(pos, dir) {
phrebejk@460:       do pos += dir;
phrebejk@460:       while (pos > 0 && isExtendingChar.test(line.text.charAt(pos)));
phrebejk@460:       return pos;
phrebejk@460:     } : function(pos, dir) { return pos + dir; };
phrebejk@460:     var linedir = bidi[0].level;
phrebejk@460:     for (var i = 0; i < bidi.length; ++i) {
phrebejk@460:       var part = bidi[i], sticky = part.level % 2 == linedir;
phrebejk@460:       if ((part.from < start && part.to > start) ||
phrebejk@460:           (sticky && (part.from == start || part.to == start))) break;
phrebejk@460:     }
phrebejk@460:     var target = moveOneUnit(start, part.level % 2 ? -dir : dir);
phrebejk@460: 
phrebejk@460:     while (target != null) {
phrebejk@460:       if (part.level % 2 == linedir) {
phrebejk@460:         if (target < part.from || target > part.to) {
phrebejk@460:           part = bidi[i += dir];
phrebejk@460:           target = part && (dir > 0 == part.level % 2 ? moveOneUnit(part.to, -1) : moveOneUnit(part.from, 1));
phrebejk@460:         } else break;
phrebejk@460:       } else {
phrebejk@460:         if (target == bidiLeft(part)) {
phrebejk@460:           part = bidi[--i];
phrebejk@460:           target = part && bidiRight(part);
phrebejk@460:         } else if (target == bidiRight(part)) {
phrebejk@460:           part = bidi[++i];
phrebejk@460:           target = part && bidiLeft(part);
phrebejk@460:         } else break;
phrebejk@460:       }
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     return target < 0 || target > line.text.length ? null : target;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   function moveLogically(line, start, dir, byUnit) {
phrebejk@460:     var target = start + dir;
phrebejk@460:     if (byUnit) while (target > 0 && isExtendingChar.test(line.text.charAt(target))) target += dir;
phrebejk@460:     return target < 0 || target > line.text.length ? null : target;
phrebejk@460:   }
phrebejk@460: 
phrebejk@460:   // Bidirectional ordering algorithm
phrebejk@460:   // See http://unicode.org/reports/tr9/tr9-13.html for the algorithm
phrebejk@460:   // that this (partially) implements.
phrebejk@460: 
phrebejk@460:   // One-char codes used for character types:
phrebejk@460:   // L (L):   Left-to-Right
phrebejk@460:   // R (R):   Right-to-Left
phrebejk@460:   // r (AL):  Right-to-Left Arabic
phrebejk@460:   // 1 (EN):  European Number
phrebejk@460:   // + (ES):  European Number Separator
phrebejk@460:   // % (ET):  European Number Terminator
phrebejk@460:   // n (AN):  Arabic Number
phrebejk@460:   // , (CS):  Common Number Separator
phrebejk@460:   // m (NSM): Non-Spacing Mark
phrebejk@460:   // b (BN):  Boundary Neutral
phrebejk@460:   // s (B):   Paragraph Separator
phrebejk@460:   // t (S):   Segment Separator
phrebejk@460:   // w (WS):  Whitespace
phrebejk@460:   // N (ON):  Other Neutrals
phrebejk@460: 
phrebejk@460:   // Returns null if characters are ordered as they appear
phrebejk@460:   // (left-to-right), or an array of sections ({from, to, level}
phrebejk@460:   // objects) in the order in which they occur visually.
phrebejk@460:   var bidiOrdering = (function() {
phrebejk@460:     // Character types for codepoints 0 to 0xff
phrebejk@460:     var lowTypes = "bbbbbbbbbtstwsbbbbbbbbbbbbbbssstwNN%%%NNNNNN,N,N1111111111NNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNNNLLLLLLLLLLLLLLLLLLLLLLLLLLNNNNbbbbbbsbbbbbbbbbbbbbbbbbbbbbbbbbb,N%%%%NNNNLNNNNN%%11NLNNN1LNNNNNLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLLNLLLLLLLL";
phrebejk@460:     // Character types for codepoints 0x600 to 0x6ff
phrebejk@460:     var arabicTypes = "rrrrrrrrrrrr,rNNmmmmmmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmrrrrrrrnnnnnnnnnn%nnrrrmrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrmmmmmmmmmmmmmmmmmmmNmmmmrrrrrrrrrrrrrrrrrr";
phrebejk@460:     function charType(code) {
phrebejk@460:       if (code <= 0xff) return lowTypes.charAt(code);
phrebejk@460:       else if (0x590 <= code && code <= 0x5f4) return "R";
phrebejk@460:       else if (0x600 <= code && code <= 0x6ff) return arabicTypes.charAt(code - 0x600);
phrebejk@460:       else if (0x700 <= code && code <= 0x8ac) return "r";
phrebejk@460:       else return "L";
phrebejk@460:     }
phrebejk@460: 
phrebejk@460:     var bidiRE = /[\u0590-\u05f4\u0600-\u06ff\u0700-\u08ac]/;
phrebejk@460:     var isNeutral = /[stwN]/, isStrong = /[LRr]/, countsAsLeft = /[Lb1n]/, countsAsNum = /[1n]/;
phrebejk@460: 
phrebejk@460:     return function charOrdering(str) {
phrebejk@460:       if (!bidiRE.test(str)) return false;
phrebejk@460:       var len = str.length, types = [], startType = null;
phrebejk@460:       for (var i = 0, type; i < len; ++i) {
phrebejk@460:         types.push(type = charType(str.charCodeAt(i)));
phrebejk@460:         if (startType == null) {
phrebejk@460:           if (type == "L") startType = "L";
phrebejk@460:           else if (type == "R" || type == "r") startType = "R";
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       if (startType == null) startType = "L";
phrebejk@460: 
phrebejk@460:       // W1. Examine each non-spacing mark (NSM) in the level run, and
phrebejk@460:       // change the type of the NSM to the type of the previous
phrebejk@460:       // character. If the NSM is at the start of the level run, it will
phrebejk@460:       // get the type of sor.
phrebejk@460:       for (var i = 0, prev = startType; i < len; ++i) {
phrebejk@460:         var type = types[i];
phrebejk@460:         if (type == "m") types[i] = prev;
phrebejk@460:         else prev = type;
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // W2. Search backwards from each instance of a European number
phrebejk@460:       // until the first strong type (R, L, AL, or sor) is found. If an
phrebejk@460:       // AL is found, change the type of the European number to Arabic
phrebejk@460:       // number.
phrebejk@460:       // W3. Change all ALs to R.
phrebejk@460:       for (var i = 0, cur = startType; i < len; ++i) {
phrebejk@460:         var type = types[i];
phrebejk@460:         if (type == "1" && cur == "r") types[i] = "n";
phrebejk@460:         else if (isStrong.test(type)) { cur = type; if (type == "r") types[i] = "R"; }
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // W4. A single European separator between two European numbers
phrebejk@460:       // changes to a European number. A single common separator between
phrebejk@460:       // two numbers of the same type changes to that type.
phrebejk@460:       for (var i = 1, prev = types[0]; i < len - 1; ++i) {
phrebejk@460:         var type = types[i];
phrebejk@460:         if (type == "+" && prev == "1" && types[i+1] == "1") types[i] = "1";
phrebejk@460:         else if (type == "," && prev == types[i+1] &&
phrebejk@460:                  (prev == "1" || prev == "n")) types[i] = prev;
phrebejk@460:         prev = type;
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // W5. A sequence of European terminators adjacent to European
phrebejk@460:       // numbers changes to all European numbers.
phrebejk@460:       // W6. Otherwise, separators and terminators change to Other
phrebejk@460:       // Neutral.
phrebejk@460:       for (var i = 0; i < len; ++i) {
phrebejk@460:         var type = types[i];
phrebejk@460:         if (type == ",") types[i] = "N";
phrebejk@460:         else if (type == "%") {
phrebejk@460:           for (var end = i + 1; end < len && types[end] == "%"; ++end) {}
phrebejk@460:           var replace = (i && types[i-1] == "!") || (end < len - 1 && types[end] == "1") ? "1" : "N";
phrebejk@460:           for (var j = i; j < end; ++j) types[j] = replace;
phrebejk@460:           i = end - 1;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // W7. Search backwards from each instance of a European number
phrebejk@460:       // until the first strong type (R, L, or sor) is found. If an L is
phrebejk@460:       // found, then change the type of the European number to L.
phrebejk@460:       for (var i = 0, cur = startType; i < len; ++i) {
phrebejk@460:         var type = types[i];
phrebejk@460:         if (cur == "L" && type == "1") types[i] = "L";
phrebejk@460:         else if (isStrong.test(type)) cur = type;
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // N1. A sequence of neutrals takes the direction of the
phrebejk@460:       // surrounding strong text if the text on both sides has the same
phrebejk@460:       // direction. European and Arabic numbers act as if they were R in
phrebejk@460:       // terms of their influence on neutrals. Start-of-level-run (sor)
phrebejk@460:       // and end-of-level-run (eor) are used at level run boundaries.
phrebejk@460:       // N2. Any remaining neutrals take the embedding direction.
phrebejk@460:       for (var i = 0; i < len; ++i) {
phrebejk@460:         if (isNeutral.test(types[i])) {
phrebejk@460:           for (var end = i + 1; end < len && isNeutral.test(types[end]); ++end) {}
phrebejk@460:           var before = (i ? types[i-1] : startType) == "L";
phrebejk@460:           var after = (end < len - 1 ? types[end] : startType) == "L";
phrebejk@460:           var replace = before || after ? "L" : "R";
phrebejk@460:           for (var j = i; j < end; ++j) types[j] = replace;
phrebejk@460:           i = end - 1;
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460: 
phrebejk@460:       // Here we depart from the documented algorithm, in order to avoid
phrebejk@460:       // building up an actual levels array. Since there are only three
phrebejk@460:       // levels (0, 1, 2) in an implementation that doesn't take
phrebejk@460:       // explicit embedding into account, we can build up the order on
phrebejk@460:       // the fly, without following the level-based algorithm.
phrebejk@460:       var order = [], m;
phrebejk@460:       for (var i = 0; i < len;) {
phrebejk@460:         if (countsAsLeft.test(types[i])) {
phrebejk@460:           var start = i;
phrebejk@460:           for (++i; i < len && countsAsLeft.test(types[i]); ++i) {}
phrebejk@460:           order.push({from: start, to: i, level: 0});
phrebejk@460:         } else {
phrebejk@460:           var pos = i, at = order.length;
phrebejk@460:           for (++i; i < len && types[i] != "L"; ++i) {}
phrebejk@460:           for (var j = pos; j < i;) {
phrebejk@460:             if (countsAsNum.test(types[j])) {
phrebejk@460:               if (pos < j) order.splice(at, 0, {from: pos, to: j, level: 1});
phrebejk@460:               var nstart = j;
phrebejk@460:               for (++j; j < i && countsAsNum.test(types[j]); ++j) {}
phrebejk@460:               order.splice(at, 0, {from: nstart, to: j, level: 2});
phrebejk@460:               pos = j;
phrebejk@460:             } else ++j;
phrebejk@460:           }
phrebejk@460:           if (pos < i) order.splice(at, 0, {from: pos, to: i, level: 1});
phrebejk@460:         }
phrebejk@460:       }
phrebejk@460:       if (order[0].level == 1 && (m = str.match(/^\s+/))) {
phrebejk@460:         order[0].from = m[0].length;
phrebejk@460:         order.unshift({from: 0, to: m[0].length, level: 0});
phrebejk@460:       }
phrebejk@460:       if (lst(order).level == 1 && (m = str.match(/\s+$/))) {
phrebejk@460:         lst(order).to -= m[0].length;
phrebejk@460:         order.push({from: len - m[0].length, to: len, level: 0});
phrebejk@460:       }
phrebejk@460:       if (order[0].level != lst(order).level)
phrebejk@460:         order.push({from: len, to: len, level: order[0].level});
phrebejk@460: 
phrebejk@460:       return order;
phrebejk@460:     };
phrebejk@460:   })();
phrebejk@460: 
phrebejk@460:   // THE END
phrebejk@460: 
phrebejk@460:   CodeMirror.version = "3.0";
phrebejk@460: 
phrebejk@460:   return CodeMirror;
phrebejk@460: })();