// CodeMirror version 2.2

//

// All functions that need access to the editor's state live inside

// the CodeMirror function. Below that, at the bottom of the file,

// some utilities are defined.



// CodeMirror is the only global var we claim

var CodeMirror = (function() {

    // This is the function that produces an editor instance. It's

    // closure is used to store the editor state.

    function CodeMirror(place, givenOptions) {

        // Determine effective options based on given values and defaults.

        var options = {}, defaults = CodeMirror.defaults;

        for (var opt in defaults)

            if (defaults.hasOwnProperty(opt))

                options[opt] = (givenOptions && givenOptions.hasOwnProperty(opt) ? givenOptions : defaults)[opt];



        var targetDocument = options["document"];

        // The element in which the editor lives.

        var wrapper = targetDocument.createElement("div");

        wrapper.className = "CodeMirror" + (options.lineWrapping ? " CodeMirror-wrap" : "");

        // This mess creates the base DOM structure for the editor.

        wrapper.innerHTML =

            '<div style="overflow: hidden; position: relative; width: 3px; height: 0px;">' + // Wraps and hides input textarea

                '<textarea style="position: absolute; padding: 0; width: 1px;" wrap="off" ' +

                'autocorrect="off" autocapitalize="off"></textarea></div>' +

                '<div class="CodeMirror-scroll" tabindex="-1">' +

                '<div style="position: relative">' + // Set to the height of the text, causes scrolling

                '<div style="position: relative">' + // Moved around its parent to cover visible view

                '<div class="CodeMirror-gutter"><div class="CodeMirror-gutter-text"></div></div>' +

                // Provides positioning relative to (visible) text origin

                '<div class="CodeMirror-lines"><div style="position: relative">' +

                '<div style="position: absolute; width: 100%; height: 0; overflow: hidden; visibility: hidden"></div>' +

                '<pre class="CodeMirror-cursor">&#160;</pre>' + // Absolutely positioned blinky cursor

                '<div></div>' + // This DIV contains the actual code

                '</div></div></div></div></div>';

        if (place.appendChild) place.appendChild(wrapper); else place(wrapper);

        // I've never seen more elegant code in my life.

        var inputDiv = wrapper.firstChild, input = inputDiv.firstChild,

            scroller = wrapper.lastChild, code = scroller.firstChild,

            mover = code.firstChild, gutter = mover.firstChild, gutterText = gutter.firstChild,

            lineSpace = gutter.nextSibling.firstChild, measure = lineSpace.firstChild,

            cursor = measure.nextSibling, lineDiv = cursor.nextSibling;

        themeChanged();

        // Needed to hide big blue blinking cursor on Mobile Safari

        if (/AppleWebKit/.test(navigator.userAgent) && /Mobile\/\w+/.test(navigator.userAgent)) input.style.width = "0px";

        if (!webkit) lineSpace.draggable = true;

        if (options.tabindex != null) input.tabIndex = options.tabindex;

        if (!options.gutter && !options.lineNumbers) gutter.style.display = "none";



        // Check for problem with IE innerHTML not working when we have a

        // P (or similar) parent node.

        try { stringWidth("x"); }

        catch (e) {

            if (e.message.match(/runtime/i))

                e = new Error("A CodeMirror inside a P-style element does not work in Internet Explorer. (innerHTML bug)");

            throw e;

        }



        // Delayed object wrap timeouts, making sure only one is active. blinker holds an interval.

        var poll = new Delayed(), highlight = new Delayed(), blinker;



        // mode holds a mode API object. doc is the tree of Line objects,

        // work an array of lines that should be parsed, and history the

        // undo history (instance of History constructor).

        var mode, doc = new BranchChunk([new LeafChunk([new Line("")])]), work, focused;

        loadMode();

        // The selection. These are always maintained to point at valid

        // positions. Inverted is used to remember that the user is

        // selecting bottom-to-top.

        var sel = {from: {line: 0, ch: 0}, to: {line: 0, ch: 0}, inverted: false};

        // Selection-related flags. shiftSelecting obviously tracks

        // whether the user is holding shift.

        var shiftSelecting, lastClick, lastDoubleClick, draggingText, overwrite = false;

        // Variables used by startOperation/endOperation to track what

        // happened during the operation.

        var updateInput, userSelChange, changes, textChanged, selectionChanged, leaveInputAlone,

            gutterDirty, callbacks;

        // Current visible range (may be bigger than the view window).

        var displayOffset = 0, showingFrom = 0, showingTo = 0, lastSizeC = 0;

        // bracketHighlighted is used to remember that a backet has been

        // marked.

        var bracketHighlighted;

        // Tracks the maximum line length so that the horizontal scrollbar

        // can be kept static when scrolling.

        var maxLine = "", maxWidth, tabText = computeTabText();



        // Initialize the content.

        operation(function(){setValue(options.value || ""); updateInput = false;})();

        var history = new History();



        // Register our event handlers.

        connect(scroller, "mousedown", operation(onMouseDown));

        connect(scroller, "dblclick", operation(onDoubleClick));

        connect(lineSpace, "dragstart", onDragStart);

        connect(lineSpace, "selectstart", e_preventDefault);

        // Gecko browsers fire contextmenu *after* opening the menu, at

        // which point we can't mess with it anymore. Context menu is

        // handled in onMouseDown for Gecko.

        if (!gecko) connect(scroller, "contextmenu", onContextMenu);

        connect(scroller, "scroll", function() {

            updateDisplay([]);

            if (options.fixedGutter) gutter.style.left = scroller.scrollLeft + "px";

            if (options.onScroll) options.onScroll(instance);

        });

        connect(window, "resize", function() {updateDisplay(true);});

        connect(input, "keyup", operation(onKeyUp));

        connect(input, "input", fastPoll);

        connect(input, "keydown", operation(onKeyDown));

        connect(input, "keypress", operation(onKeyPress));

        connect(input, "focus", onFocus);

        connect(input, "blur", onBlur);



        connect(scroller, "dragenter", e_stop);

        connect(scroller, "dragover", e_stop);

        connect(scroller, "drop", operation(onDrop));

        connect(scroller, "paste", function(){focusInput(); fastPoll();});

        connect(input, "paste", fastPoll);

        connect(input, "cut", operation(function(){replaceSelection("");}));



        // IE throws unspecified error in certain cases, when

        // trying to access activeElement before onload

        var hasFocus; try { hasFocus = (targetDocument.activeElement == input); } catch(e) { }

        if (hasFocus) setTimeout(onFocus, 20);

        else onBlur();



        function isLine(l) {return l >= 0 && l < doc.size;}

        // The instance object that we'll return. Mostly calls out to

        // local functions in the CodeMirror function. Some do some extra

        // range checking and/or clipping. operation is used to wrap the

        // call so that changes it makes are tracked, and the display is

        // updated afterwards.

        var instance = wrapper.CodeMirror = {

            getValue: getValue,

            setValue: operation(setValue),

            getSelection: getSelection,

            replaceSelection: operation(replaceSelection),

            focus: function(){focusInput(); onFocus(); fastPoll();},

            setOption: function(option, value) {

                var oldVal = options[option];

                options[option] = value;

                if (option == "mode" || option == "indentUnit") loadMode();

                else if (option == "readOnly" && value) {onBlur(); input.blur();}

                else if (option == "theme") themeChanged();

                else if (option == "lineWrapping" && oldVal != value) operation(wrappingChanged)();

                else if (option == "tabSize") operation(tabsChanged)();

                if (option == "lineNumbers" || option == "gutter" || option == "firstLineNumber" || option == "theme")

                    operation(gutterChanged)();

            },

            getOption: function(option) {return options[option];},

            undo: operation(undo),

            redo: operation(redo),

            indentLine: operation(function(n, dir) {

                if (isLine(n)) indentLine(n, dir == null ? "smart" : dir ? "add" : "subtract");

            }),

            indentSelection: operation(indentSelected),

            historySize: function() {return {undo: history.done.length, redo: history.undone.length};},

            clearHistory: function() {history = new History();},

            matchBrackets: operation(function(){matchBrackets(true);}),

            getTokenAt: operation(function(pos) {

                pos = clipPos(pos);

                return getLine(pos.line).getTokenAt(mode, getStateBefore(pos.line), pos.ch);

            }),

            getStateAfter: function(line) {

                line = clipLine(line == null ? doc.size - 1: line);

                return getStateBefore(line + 1);

            },

            cursorCoords: function(start){

                if (start == null) start = sel.inverted;

                return pageCoords(start ? sel.from : sel.to);

            },

            charCoords: function(pos){return pageCoords(clipPos(pos));},

            coordsChar: function(coords) {

                var off = eltOffset(lineSpace);

                return coordsChar(coords.x - off.left, coords.y - off.top);

            },

            markText: operation(markText),

            setBookmark: setBookmark,

            setMarker: operation(addGutterMarker),

            clearMarker: operation(removeGutterMarker),

            setLineClass: operation(setLineClass),

            hideLine: operation(function(h) {return setLineHidden(h, true);}),

            showLine: operation(function(h) {return setLineHidden(h, false);}),

            onDeleteLine: function(line, f) {

                if (typeof line == "number") {

                    if (!isLine(line)) return null;

                    line = getLine(line);

                }

                (line.handlers || (line.handlers = [])).push(f);

                return line;

            },

            lineInfo: lineInfo,

            addWidget: function(pos, node, scroll, vert, horiz) {

                pos = localCoords(clipPos(pos));

                var top = pos.yBot, left = pos.x;

                node.style.position = "absolute";

                code.appendChild(node);

                if (vert == "over") top = pos.y;

                else if (vert == "near") {

                    var vspace = Math.max(scroller.offsetHeight, doc.height * textHeight()),

                        hspace = Math.max(code.clientWidth, lineSpace.clientWidth) - paddingLeft();

                    if (pos.yBot + node.offsetHeight > vspace && pos.y > node.offsetHeight)

                        top = pos.y - node.offsetHeight;

                    if (left + node.offsetWidth > hspace)

                        left = hspace - node.offsetWidth;

                }

                node.style.top = (top + paddingTop()) + "px";

                node.style.left = node.style.right = "";

                if (horiz == "right") {

                    left = code.clientWidth - node.offsetWidth;

                    node.style.right = "0px";

                } else {

                    if (horiz == "left") left = 0;

                    else if (horiz == "middle") left = (code.clientWidth - node.offsetWidth) / 2;

                    node.style.left = (left + paddingLeft()) + "px";

                }

                if (scroll)

                    scrollIntoView(left, top, left + node.offsetWidth, top + node.offsetHeight);

            },



            lineCount: function() {return doc.size;},

            clipPos: clipPos,

            getCursor: function(start) {

                if (start == null) start = sel.inverted;

                return copyPos(start ? sel.from : sel.to);

            },

            somethingSelected: function() {return !posEq(sel.from, sel.to);},

            setCursor: operation(function(line, ch, user) {

                if (ch == null && typeof line.line == "number") setCursor(line.line, line.ch, user);

                else setCursor(line, ch, user);

            }),

            setSelection: operation(function(from, to, user) {

                (user ? setSelectionUser : setSelection)(clipPos(from), clipPos(to || from));

            }),

            getLine: function(line) {if (isLine(line)) return getLine(line).text;},

            getLineHandle: function(line) {if (isLine(line)) return getLine(line);},

            setLine: operation(function(line, text) {

                if (isLine(line)) replaceRange(text, {line: line, ch: 0}, {line: line, ch: getLine(line).text.length});

            }),

            removeLine: operation(function(line) {

                if (isLine(line)) replaceRange("", {line: line, ch: 0}, clipPos({line: line+1, ch: 0}));

            }),

            replaceRange: operation(replaceRange),

            getRange: function(from, to) {return getRange(clipPos(from), clipPos(to));},



            execCommand: function(cmd) {return commands[cmd](instance);},

            // Stuff used by commands, probably not much use to outside code.

            moveH: operation(moveH),

            deleteH: operation(deleteH),

            moveV: operation(moveV),

            toggleOverwrite: function() {overwrite = !overwrite;},



            posFromIndex: function(off) {

                var lineNo = 0, ch;

                doc.iter(0, doc.size, function(line) {

                    var sz = line.text.length + 1;

                    if (sz > off) { ch = off; return true; }

                    off -= sz;

                    ++lineNo;

                });

                return clipPos({line: lineNo, ch: ch});

            },

            indexFromPos: function (coords) {

                if (coords.line < 0 || coords.ch < 0) return 0;

                var index = coords.ch;

                doc.iter(0, coords.line, function (line) {

                    index += line.text.length + 1;

                });

                return index;

            },



            operation: function(f){return operation(f)();},

            refresh: function(){updateDisplay(true);},

            getInputField: function(){return input;},

            getWrapperElement: function(){return wrapper;},

            getScrollerElement: function(){return scroller;},

            getGutterElement: function(){return gutter;}

        };



        function getLine(n) { return getLineAt(doc, n); }

        function updateLineHeight(line, height) {

            gutterDirty = true;

            var diff = height - line.height;

            for (var n = line; n; n = n.parent) n.height += diff;

        }



        function setValue(code) {

            var top = {line: 0, ch: 0};

            updateLines(top, {line: doc.size - 1, ch: getLine(doc.size-1).text.length},

                splitLines(code), top, top);

            updateInput = true;

        }

        function getValue(code) {

            var text = [];

            doc.iter(0, doc.size, function(line) { text.push(line.text); });

            return text.join("\n");

        }



        function onMouseDown(e) {

            setShift(e.shiftKey);

            // Check whether this is a click in a widget

            for (var n = e_target(e); n != wrapper; n = n.parentNode)

                if (n.parentNode == code && n != mover) return;



            // See if this is a click in the gutter

            for (var n = e_target(e); n != wrapper; n = n.parentNode)

                if (n.parentNode == gutterText) {

                    if (options.onGutterClick)

                        options.onGutterClick(instance, indexOf(gutterText.childNodes, n) + showingFrom, e);

                    return e_preventDefault(e);

                }



            var start = posFromMouse(e);



            switch (e_button(e)) {

                case 3:

                    if (gecko && !mac) onContextMenu(e);

                    return;

                case 2:

                    if (start) setCursor(start.line, start.ch, true);

                    return;

            }

            // For button 1, if it was clicked inside the editor

            // (posFromMouse returning non-null), we have to adjust the

            // selection.

            if (!start) {if (e_target(e) == scroller) e_preventDefault(e); return;}



            if (!focused) onFocus();



            var now = +new Date;

            if (lastDoubleClick && lastDoubleClick.time > now - 400 && posEq(lastDoubleClick.pos, start)) {

                e_preventDefault(e);

                setTimeout(focusInput, 20);

                return selectLine(start.line);

            } else if (lastClick && lastClick.time > now - 400 && posEq(lastClick.pos, start)) {

                lastDoubleClick = {time: now, pos: start};

                e_preventDefault(e);

                return selectWordAt(start);

            } else { lastClick = {time: now, pos: start}; }



            var last = start, going;

            if (dragAndDrop && !posEq(sel.from, sel.to) &&

                !posLess(start, sel.from) && !posLess(sel.to, start)) {

                // Let the drag handler handle this.

                if (webkit) lineSpace.draggable = true;

                var up = connect(targetDocument, "mouseup", operation(function(e2) {

                    if (webkit) lineSpace.draggable = false;

                    draggingText = false;

                    up();

                    if (Math.abs(e.clientX - e2.clientX) + Math.abs(e.clientY - e2.clientY) < 10) {

                        e_preventDefault(e2);

                        setCursor(start.line, start.ch, true);

                        focusInput();

                    }

                }), true);

                draggingText = true;

                return;

            }

            e_preventDefault(e);

            setCursor(start.line, start.ch, true);



            function extend(e) {

                var cur = posFromMouse(e, true);

                if (cur && !posEq(cur, last)) {

                    if (!focused) onFocus();

                    last = cur;

                    setSelectionUser(start, cur);

                    updateInput = false;

                    var visible = visibleLines();

                    if (cur.line >= visible.to || cur.line < visible.from)

                        going = setTimeout(operation(function(){extend(e);}), 150);

                }

            }



            var move = connect(targetDocument, "mousemove", operation(function(e) {

                clearTimeout(going);

                e_preventDefault(e);

                extend(e);

            }), true);

            var up = connect(targetDocument, "mouseup", operation(function(e) {

                clearTimeout(going);

                var cur = posFromMouse(e);

                if (cur) setSelectionUser(start, cur);

                e_preventDefault(e);

                focusInput();

                updateInput = true;

                move(); up();

            }), true);

        }

        function onDoubleClick(e) {

            for (var n = e_target(e); n != wrapper; n = n.parentNode)

                if (n.parentNode == gutterText) return e_preventDefault(e);

            var start = posFromMouse(e);

            if (!start) return;

            lastDoubleClick = {time: +new Date, pos: start};

            e_preventDefault(e);

            selectWordAt(start);

        }

        function onDrop(e) {

            e.preventDefault();

            var pos = posFromMouse(e, true), files = e.dataTransfer.files;

            if (!pos || options.readOnly) return;

            if (files && files.length && window.FileReader && window.File) {

                function loadFile(file, i) {

                    var reader = new FileReader;

                    reader.onload = function() {

                        text[i] = reader.result;

                        if (++read == n) {

                            pos = clipPos(pos);

                            operation(function() {

                                var end = replaceRange(text.join(""), pos, pos);

                                setSelectionUser(pos, end);

                            })();

                        }

                    };

                    reader.readAsText(file);

                }

                var n = files.length, text = Array(n), read = 0;

                for (var i = 0; i < n; ++i) loadFile(files[i], i);

            }

            else {

                try {

                    var text = e.dataTransfer.getData("Text");

                    if (text) {

                        var end = replaceRange(text, pos, pos);

                        var curFrom = sel.from, curTo = sel.to;

                        setSelectionUser(pos, end);

                        if (draggingText) replaceRange("", curFrom, curTo);

                        focusInput();

                    }

                }

                catch(e){}

            }

        }

        function onDragStart(e) {

            var txt = getSelection();

            // This will reset escapeElement

            htmlEscape(txt);

            e.dataTransfer.setDragImage(escapeElement, 0, 0);

            e.dataTransfer.setData("Text", txt);

        }

        function handleKeyBinding(e) {

            var name = keyNames[e.keyCode], next = keyMap[options.keyMap].auto, bound, dropShift;

            if (name == null || e.altGraphKey) {

                if (next) options.keyMap = next;

                return null;

            }

            if (e.altKey) name = "Alt-" + name;

            if (e.ctrlKey) name = "Ctrl-" + name;

            if (e.metaKey) name = "Cmd-" + name;

            if (e.shiftKey && (bound = lookupKey("Shift-" + name, options.extraKeys, options.keyMap))) {

                dropShift = true;

            } else {

                bound = lookupKey(name, options.extraKeys, options.keyMap);

            }

            if (typeof bound == "string") {

                if (commands.propertyIsEnumerable(bound)) bound = commands[bound];

                else bound = null;

            }

            if (next && (bound || !isModifierKey(e))) options.keyMap = next;

            if (!bound) return false;

            if (dropShift) {

                var prevShift = shiftSelecting;

                shiftSelecting = null;

                bound(instance);

                shiftSelecting = prevShift;

            } else bound(instance);

            e_preventDefault(e);

            return true;

        }

        var lastStoppedKey = null;

        function onKeyDown(e) {

            if (!focused) onFocus();

            var code = e.keyCode;

            // IE does strange things with escape.

            if (ie && code == 27) { e.returnValue = false; }

            setShift(code == 16 || e.shiftKey);

            // First give onKeyEvent option a chance to handle this.

            if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;

            var handled = handleKeyBinding(e);

            if (window.opera) {

                lastStoppedKey = handled ? e.keyCode : null;

                // Opera has no cut event... we try to at least catch the key combo

                if (!handled && (mac ? e.metaKey : e.ctrlKey) && e.keyCode == 88)

                    replaceSelection("");

            }

        }

        function onKeyPress(e) {

            if (window.opera && e.keyCode == lastStoppedKey) {lastStoppedKey = null; e_preventDefault(e); return;}

            if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;

            if (window.opera && !e.which && handleKeyBinding(e)) return;

            if (options.electricChars && mode.electricChars) {

                var ch = String.fromCharCode(e.charCode == null ? e.keyCode : e.charCode);

                if (mode.electricChars.indexOf(ch) > -1)

                    setTimeout(operation(function() {indentLine(sel.to.line, "smart");}), 75);

            }

            fastPoll();

        }

        function onKeyUp(e) {

            if (options.onKeyEvent && options.onKeyEvent(instance, addStop(e))) return;

            if (e.keyCode == 16) shiftSelecting = null;

        }



        function onFocus() {

            if (options.readOnly) return;

            if (!focused) {

                if (options.onFocus) options.onFocus(instance);

                focused = true;

                if (wrapper.className.search(/\bCodeMirror-focused\b/) == -1)

                    wrapper.className += " CodeMirror-focused";

                if (!leaveInputAlone) resetInput(true);

            }

            slowPoll();

            restartBlink();

        }

        function onBlur() {

            if (focused) {

                if (options.onBlur) options.onBlur(instance);

                focused = false;

                wrapper.className = wrapper.className.replace(" CodeMirror-focused", "");

            }

            clearInterval(blinker);

            setTimeout(function() {if (!focused) shiftSelecting = null;}, 150);

        }



        // Replace the range from from to to by the strings in newText.

        // Afterwards, set the selection to selFrom, selTo.

        function updateLines(from, to, newText, selFrom, selTo) {

            if (history) {

                var old = [];

                doc.iter(from.line, to.line + 1, function(line) { old.push(line.text); });

                history.addChange(from.line, newText.length, old);

                while (history.done.length > options.undoDepth) history.done.shift();

            }

            updateLinesNoUndo(from, to, newText, selFrom, selTo);

        }

        function unredoHelper(from, to) {

            var change = from.pop();

            if (change) {

                var replaced = [], end = change.start + change.added;

                doc.iter(change.start, end, function(line) { replaced.push(line.text); });

                to.push({start: change.start, added: change.old.length, old: replaced});

                var pos = clipPos({line: change.start + change.old.length - 1,

                    ch: editEnd(replaced[replaced.length-1], change.old[change.old.length-1])});

                updateLinesNoUndo({line: change.start, ch: 0}, {line: end - 1, ch: getLine(end-1).text.length}, change.old, pos, pos);

                updateInput = true;

            }

        }

        function undo() {unredoHelper(history.done, history.undone);}

        function redo() {unredoHelper(history.undone, history.done);}



        function updateLinesNoUndo(from, to, newText, selFrom, selTo) {

            var recomputeMaxLength = false, maxLineLength = maxLine.length;

            if (!options.lineWrapping)

                doc.iter(from.line, to.line, function(line) {

                    if (line.text.length == maxLineLength) {recomputeMaxLength = true; return true;}

                });

            if (from.line != to.line || newText.length > 1) gutterDirty = true;



            var nlines = to.line - from.line, firstLine = getLine(from.line), lastLine = getLine(to.line);

            // First adjust the line structure, taking some care to leave highlighting intact.

            if (from.ch == 0 && to.ch == 0 && newText[newText.length - 1] == "") {

                // This is a whole-line replace. Treated specially to make

                // sure line objects move the way they are supposed to.

                var added = [], prevLine = null;

                if (from.line) {

                    prevLine = getLine(from.line - 1);

                    prevLine.fixMarkEnds(lastLine);

                } else lastLine.fixMarkStarts();

                for (var i = 0, e = newText.length - 1; i < e; ++i)

                    added.push(Line.inheritMarks(newText[i], prevLine));

                if (nlines) doc.remove(from.line, nlines, callbacks);

                if (added.length) doc.insert(from.line, added);

            } else if (firstLine == lastLine) {

                if (newText.length == 1)

                    firstLine.replace(from.ch, to.ch, newText[0]);

                else {

                    lastLine = firstLine.split(to.ch, newText[newText.length-1]);

                    firstLine.replace(from.ch, null, newText[0]);

                    firstLine.fixMarkEnds(lastLine);

                    var added = [];

                    for (var i = 1, e = newText.length - 1; i < e; ++i)

                        added.push(Line.inheritMarks(newText[i], firstLine));

                    added.push(lastLine);

                    doc.insert(from.line + 1, added);

                }

            } else if (newText.length == 1) {

                firstLine.replace(from.ch, null, newText[0]);

                lastLine.replace(null, to.ch, "");

                firstLine.append(lastLine);

                doc.remove(from.line + 1, nlines, callbacks);

            } else {

                var added = [];

                firstLine.replace(from.ch, null, newText[0]);

                lastLine.replace(null, to.ch, newText[newText.length-1]);

                firstLine.fixMarkEnds(lastLine);

                for (var i = 1, e = newText.length - 1; i < e; ++i)

                    added.push(Line.inheritMarks(newText[i], firstLine));

                if (nlines > 1) doc.remove(from.line + 1, nlines - 1, callbacks);

                doc.insert(from.line + 1, added);

            }

            if (options.lineWrapping) {

                var perLine = scroller.clientWidth / charWidth() - 3;

                doc.iter(from.line, from.line + newText.length, function(line) {

                    if (line.hidden) return;

                    var guess = Math.ceil(line.text.length / perLine) || 1;

                    if (guess != line.height) updateLineHeight(line, guess);

                });

            } else {

                doc.iter(from.line, i + newText.length, function(line) {

                    var l = line.text;

                    if (l.length > maxLineLength) {

                        maxLine = l; maxLineLength = l.length; maxWidth = null;

                        recomputeMaxLength = false;

                    }

                });

                if (recomputeMaxLength) {

                    maxLineLength = 0; maxLine = ""; maxWidth = null;

                    doc.iter(0, doc.size, function(line) {

                        var l = line.text;

                        if (l.length > maxLineLength) {

                            maxLineLength = l.length; maxLine = l;

                        }

                    });

                }

            }



            // Add these lines to the work array, so that they will be

            // highlighted. Adjust work lines if lines were added/removed.

            var newWork = [], lendiff = newText.length - nlines - 1;

            for (var i = 0, l = work.length; i < l; ++i) {

                var task = work[i];

                if (task < from.line) newWork.push(task);

                else if (task > to.line) newWork.push(task + lendiff);

            }

            var hlEnd = from.line + Math.min(newText.length, 500);

            highlightLines(from.line, hlEnd);

            newWork.push(hlEnd);

            work = newWork;

            startWorker(100);

            // Remember that these lines changed, for updating the display

            changes.push({from: from.line, to: to.line + 1, diff: lendiff});

            var changeObj = {from: from, to: to, text: newText};

            if (textChanged) {

                for (var cur = textChanged; cur.next; cur = cur.next) {}

                cur.next = changeObj;

            } else textChanged = changeObj;



            // Update the selection

            function updateLine(n) {return n <= Math.min(to.line, to.line + lendiff) ? n : n + lendiff;}

            setSelection(selFrom, selTo, updateLine(sel.from.line), updateLine(sel.to.line));



            // Make sure the scroll-size div has the correct height.

            code.style.height = (doc.height * textHeight() + 2 * paddingTop()) + "px";

        }



        function replaceRange(code, from, to) {

            from = clipPos(from);

            if (!to) to = from; else to = clipPos(to);

            code = splitLines(code);

            function adjustPos(pos) {

                if (posLess(pos, from)) return pos;

                if (!posLess(to, pos)) return end;

                var line = pos.line + code.length - (to.line - from.line) - 1;

                var ch = pos.ch;

                if (pos.line == to.line)

                    ch += code[code.length-1].length - (to.ch - (to.line == from.line ? from.ch : 0));

                return {line: line, ch: ch};

            }

            var end;

            replaceRange1(code, from, to, function(end1) {

                end = end1;

                return {from: adjustPos(sel.from), to: adjustPos(sel.to)};

            });

            return end;

        }

        function replaceSelection(code, collapse) {

            replaceRange1(splitLines(code), sel.from, sel.to, function(end) {

                if (collapse == "end") return {from: end, to: end};

                else if (collapse == "start") return {from: sel.from, to: sel.from};

                else return {from: sel.from, to: end};

            });

        }

        function replaceRange1(code, from, to, computeSel) {

            var endch = code.length == 1 ? code[0].length + from.ch : code[code.length-1].length;

            var newSel = computeSel({line: from.line + code.length - 1, ch: endch});

            updateLines(from, to, code, newSel.from, newSel.to);

        }



        function getRange(from, to) {

            var l1 = from.line, l2 = to.line;

            if (l1 == l2) return getLine(l1).text.slice(from.ch, to.ch);

            var code = [getLine(l1).text.slice(from.ch)];

            doc.iter(l1 + 1, l2, function(line) { code.push(line.text); });

            code.push(getLine(l2).text.slice(0, to.ch));

            return code.join("\n");

        }

        function getSelection() {

            return getRange(sel.from, sel.to);

        }



        var pollingFast = false; // Ensures slowPoll doesn't cancel fastPoll

        function slowPoll() {

            if (pollingFast) return;

            poll.set(options.pollInterval, function() {

                startOperation();

                readInput();

                if (focused) slowPoll();

                endOperation();

            });

        }

        function fastPoll() {

            var missed = false;

            pollingFast = true;

            function p() {

                startOperation();

                var changed = readInput();

                if (!changed && !missed) {missed = true; poll.set(60, p);}

                else {pollingFast = false; slowPoll();}

                endOperation();

            }

            poll.set(20, p);

        }



        // Previnput is a hack to work with IME. If we reset the textarea

        // on every change, that breaks IME. So we look for changes

        // compared to the previous content instead. (Modern browsers have

        // events that indicate IME taking place, but these are not widely

        // supported or compatible enough yet to rely on.)

        var prevInput = "";

        function readInput() {

            if (leaveInputAlone || !focused || hasSelection(input)) return false;

            var text = input.value;

            if (text == prevInput) return false;

            shiftSelecting = null;

            var same = 0, l = Math.min(prevInput.length, text.length);

            while (same < l && prevInput[same] == text[same]) ++same;

            if (same < prevInput.length)

                sel.from = {line: sel.from.line, ch: sel.from.ch - (prevInput.length - same)};

            else if (overwrite && posEq(sel.from, sel.to))

                sel.to = {line: sel.to.line, ch: Math.min(getLine(sel.to.line).text.length, sel.to.ch + (text.length - same))};

            replaceSelection(text.slice(same), "end");

            prevInput = text;

            return true;

        }

        function resetInput(user) {

            if (!posEq(sel.from, sel.to)) {

                prevInput = "";

                input.value = getSelection();

                input.select();

            } else if (user) prevInput = input.value = "";

        }



        function focusInput() {

            if (!options.readOnly) input.focus();

        }



        function scrollEditorIntoView() {

            if (!cursor.getBoundingClientRect) return;

            var rect = cursor.getBoundingClientRect();

            // IE returns bogus coordinates when the instance sits inside of an iframe and the cursor is hidden

            if (ie && rect.top == rect.bottom) return;

            var winH = window.innerHeight || Math.max(document.body.offsetHeight, document.documentElement.offsetHeight);

            if (rect.top < 0 || rect.bottom > winH) cursor.scrollIntoView();

        }

        function scrollCursorIntoView() {

            var cursor = localCoords(sel.inverted ? sel.from : sel.to);

            var x = options.lineWrapping ? Math.min(cursor.x, lineSpace.offsetWidth) : cursor.x;

            return scrollIntoView(x, cursor.y, x, cursor.yBot);

        }

        function scrollIntoView(x1, y1, x2, y2) {

            var pl = paddingLeft(), pt = paddingTop(), lh = textHeight();

            y1 += pt; y2 += pt; x1 += pl; x2 += pl;

            var screen = scroller.clientHeight, screentop = scroller.scrollTop, scrolled = false, result = true;

            if (y1 < screentop) {scroller.scrollTop = Math.max(0, y1 - 2*lh); scrolled = true;}

            else if (y2 > screentop + screen) {scroller.scrollTop = y2 + lh - screen; scrolled = true;}



            var screenw = scroller.clientWidth, screenleft = scroller.scrollLeft;

            var gutterw = options.fixedGutter ? gutter.clientWidth : 0;

            if (x1 < screenleft + gutterw) {

                if (x1 < 50) x1 = 0;

                scroller.scrollLeft = Math.max(0, x1 - 10 - gutterw);

                scrolled = true;

            }

            else if (x2 > screenw + screenleft - 3) {

                scroller.scrollLeft = x2 + 10 - screenw;

                scrolled = true;

                if (x2 > code.clientWidth) result = false;

            }

            if (scrolled && options.onScroll) options.onScroll(instance);

            return result;

        }



        function visibleLines() {

            var lh = textHeight(), top = scroller.scrollTop - paddingTop();

            var from_height = Math.max(0, Math.floor(top / lh));

            var to_height = Math.ceil((top + scroller.clientHeight) / lh);

            return {from: lineAtHeight(doc, from_height),

                to: lineAtHeight(doc, to_height)};

        }

        // Uses a set of changes plus the current scroll position to

        // determine which DOM updates have to be made, and makes the

        // updates.

        function updateDisplay(changes, suppressCallback) {

            if (!scroller.clientWidth) {

                showingFrom = showingTo = displayOffset = 0;

                return;

            }

            // Compute the new visible window

            var visible = visibleLines();

            // Bail out if the visible area is already rendered and nothing changed.

            if (changes !== true && changes.length == 0 && visible.from >= showingFrom && visible.to <= showingTo) return;

            var from = Math.max(visible.from - 100, 0), to = Math.min(doc.size, visible.to + 100);

            if (showingFrom < from && from - showingFrom < 20) from = showingFrom;

            if (showingTo > to && showingTo - to < 20) to = Math.min(doc.size, showingTo);



            // Create a range of theoretically intact lines, and punch holes

            // in that using the change info.

            var intact = changes === true ? [] :

                computeIntact([{from: showingFrom, to: showingTo, domStart: 0}], changes);

            // Clip off the parts that won't be visible

            var intactLines = 0;

            for (var i = 0; i < intact.length; ++i) {

                var range = intact[i];

                if (range.from < from) {range.domStart += (from - range.from); range.from = from;}

                if (range.to > to) range.to = to;

                if (range.from >= range.to) intact.splice(i--, 1);

                else intactLines += range.to - range.from;

            }

            if (intactLines == to - from) return;

            intact.sort(function(a, b) {return a.domStart - b.domStart;});



            var th = textHeight(), gutterDisplay = gutter.style.display;

            lineDiv.style.display = gutter.style.display = "none";

            patchDisplay(from, to, intact);

            lineDiv.style.display = "";



            // Position the mover div to align with the lines it's supposed

            // to be showing (which will cover the visible display)

            var different = from != showingFrom || to != showingTo || lastSizeC != scroller.clientHeight + th;

            // This is just a bogus formula that detects when the editor is

            // resized or the font size changes.

            if (different) lastSizeC = scroller.clientHeight + th;

            showingFrom = from; showingTo = to;

            displayOffset = heightAtLine(doc, from);

            mover.style.top = (displayOffset * th) + "px";

            code.style.height = (doc.height * th + 2 * paddingTop()) + "px";



            // Since this is all rather error prone, it is honoured with the

            // only assertion in the whole file.

            if (lineDiv.childNodes.length != showingTo - showingFrom)

                throw new Error("BAD PATCH! " + JSON.stringify(intact) + " size=" + (showingTo - showingFrom) +

                    " nodes=" + lineDiv.childNodes.length);



            if (options.lineWrapping) {

                maxWidth = scroller.clientWidth;

                var curNode = lineDiv.firstChild;

                doc.iter(showingFrom, showingTo, function(line) {

                    if (!line.hidden) {

                        var height = Math.round(curNode.offsetHeight / th) || 1;

                        if (line.height != height) {updateLineHeight(line, height); gutterDirty = true;}

                    }

                    curNode = curNode.nextSibling;

                });

            } else {

                if (maxWidth == null) maxWidth = stringWidth(maxLine);

                if (maxWidth > scroller.clientWidth) {

                    lineSpace.style.width = maxWidth + "px";

                    // Needed to prevent odd wrapping/hiding of widgets placed in here.

                    code.style.width = "";

                    code.style.width = scroller.scrollWidth + "px";

                } else {

                    lineSpace.style.width = code.style.width = "";

                }

            }

            gutter.style.display = gutterDisplay;

            if (different || gutterDirty) updateGutter();

            updateCursor();

            if (!suppressCallback && options.onUpdate) options.onUpdate(instance);

            return true;

        }



        function computeIntact(intact, changes) {

            for (var i = 0, l = changes.length || 0; i < l; ++i) {

                var change = changes[i], intact2 = [], diff = change.diff || 0;

                for (var j = 0, l2 = intact.length; j < l2; ++j) {

                    var range = intact[j];

                    if (change.to <= range.from && change.diff)

                        intact2.push({from: range.from + diff, to: range.to + diff,

                            domStart: range.domStart});

                    else if (change.to <= range.from || change.from >= range.to)

                        intact2.push(range);

                    else {

                        if (change.from > range.from)

                            intact2.push({from: range.from, to: change.from, domStart: range.domStart});

                        if (change.to < range.to)

                            intact2.push({from: change.to + diff, to: range.to + diff,

                                domStart: range.domStart + (change.to - range.from)});

                    }

                }

                intact = intact2;

            }

            return intact;

        }



        function patchDisplay(from, to, intact) {

            // The first pass removes the DOM nodes that aren't intact.

            if (!intact.length) lineDiv.innerHTML = "";

            else {

                function killNode(node) {

                    var tmp = node.nextSibling;

                    node.parentNode.removeChild(node);

                    return tmp;

                }

                var domPos = 0, curNode = lineDiv.firstChild, n;

                for (var i = 0; i < intact.length; ++i) {

                    var cur = intact[i];

                    while (cur.domStart > domPos) {curNode = killNode(curNode); domPos++;}

                    for (var j = 0, e = cur.to - cur.from; j < e; ++j) {curNode = curNode.nextSibling; domPos++;}

                }

                while (curNode) curNode = killNode(curNode);

            }

            // This pass fills in the lines that actually changed.

            var nextIntact = intact.shift(), curNode = lineDiv.firstChild, j = from;

            var sfrom = sel.from.line, sto = sel.to.line, inSel = sfrom < from && sto >= from;

            var scratch = targetDocument.createElement("div"), newElt;

            doc.iter(from, to, function(line) {

                var ch1 = null, ch2 = null;

                if (inSel) {

                    ch1 = 0;

                    if (sto == j) {inSel = false; ch2 = sel.to.ch;}

                } else if (sfrom == j) {

                    if (sto == j) {ch1 = sel.from.ch; ch2 = sel.to.ch;}

                    else {inSel = true; ch1 = sel.from.ch;}

                }

                if (nextIntact && nextIntact.to == j) nextIntact = intact.shift();

                if (!nextIntact || nextIntact.from > j) {

                    if (line.hidden) scratch.innerHTML = "<pre></pre>";

                    else scratch.innerHTML = line.getHTML(ch1, ch2, true, tabText);

                    lineDiv.insertBefore(scratch.firstChild, curNode);

                } else {

                    curNode = curNode.nextSibling;

                }

                ++j;

            });

        }



        function updateGutter() {

            if (!options.gutter && !options.lineNumbers) return;

            var hText = mover.offsetHeight, hEditor = scroller.clientHeight;

            gutter.style.height = (hText - hEditor < 2 ? hEditor : hText) + "px";

            var html = [], i = showingFrom;

            doc.iter(showingFrom, Math.max(showingTo, showingFrom + 1), function(line) {

                if (line.hidden) {

                    html.push("<pre></pre>");

                } else {

                    var marker = line.gutterMarker;

                    var text = options.lineNumbers ? i + options.firstLineNumber : null;

                    if (marker && marker.text)

                        text = marker.text.replace("%N%", text != null ? text : "");

                    else if (text == null)

                        text = "\u00a0";

                    html.push((marker && marker.style ? '<pre class="' + marker.style + '">' : "<pre>"), text);

                    for (var j = 1; j < line.height; ++j) html.push("<br/>&#160;");

                    html.push("</pre>");

                }

                ++i;

            });

            gutter.style.display = "none";

            gutterText.innerHTML = html.join("");

            var minwidth = String(doc.size).length, firstNode = gutterText.firstChild, val = eltText(firstNode), pad = "";

            while (val.length + pad.length < minwidth) pad += "\u00a0";

            if (pad) firstNode.insertBefore(targetDocument.createTextNode(pad), firstNode.firstChild);

            gutter.style.display = "";

            lineSpace.style.marginLeft = gutter.offsetWidth + "px";

            gutterDirty = false;

        }

        function updateCursor() {

            var head = sel.inverted ? sel.from : sel.to, lh = textHeight();

            var pos = localCoords(head, true);

            var wrapOff = eltOffset(wrapper), lineOff = eltOffset(lineDiv);

            inputDiv.style.top = (pos.y + lineOff.top - wrapOff.top) + "px";

            inputDiv.style.left = (pos.x + lineOff.left - wrapOff.left) + "px";

            if (posEq(sel.from, sel.to)) {

                cursor.style.top = pos.y + "px";

                cursor.style.left = (options.lineWrapping ? Math.min(pos.x, lineSpace.offsetWidth) : pos.x) + "px";

                cursor.style.display = "";

            }

            else cursor.style.display = "none";

        }



        function setShift(val) {

            if (val) shiftSelecting = shiftSelecting || (sel.inverted ? sel.to : sel.from);

            else shiftSelecting = null;

        }

        function setSelectionUser(from, to) {

            var sh = shiftSelecting && clipPos(shiftSelecting);

            if (sh) {

                if (posLess(sh, from)) from = sh;

                else if (posLess(to, sh)) to = sh;

            }

            setSelection(from, to);

            userSelChange = true;

        }

        // Update the selection. Last two args are only used by

        // updateLines, since they have to be expressed in the line

        // numbers before the update.

        function setSelection(from, to, oldFrom, oldTo) {

            goalColumn = null;

            if (oldFrom == null) {oldFrom = sel.from.line; oldTo = sel.to.line;}

            if (posEq(sel.from, from) && posEq(sel.to, to)) return;

            if (posLess(to, from)) {var tmp = to; to = from; from = tmp;}



            // Skip over hidden lines.

            if (from.line != oldFrom) from = skipHidden(from, oldFrom, sel.from.ch);

            if (to.line != oldTo) to = skipHidden(to, oldTo, sel.to.ch);



            if (posEq(from, to)) sel.inverted = false;

            else if (posEq(from, sel.to)) sel.inverted = false;

            else if (posEq(to, sel.from)) sel.inverted = true;



            // Some ugly logic used to only mark the lines that actually did

            // see a change in selection as changed, rather than the whole

            // selected range.

            if (posEq(from, to)) {

                if (!posEq(sel.from, sel.to))

                    changes.push({from: oldFrom, to: oldTo + 1});

            }

            else if (posEq(sel.from, sel.to)) {

                changes.push({from: from.line, to: to.line + 1});

            }

            else {

                if (!posEq(from, sel.from)) {

                    if (from.line < oldFrom)

                        changes.push({from: from.line, to: Math.min(to.line, oldFrom) + 1});

                    else

                        changes.push({from: oldFrom, to: Math.min(oldTo, from.line) + 1});

                }

                if (!posEq(to, sel.to)) {

                    if (to.line < oldTo)

                        changes.push({from: Math.max(oldFrom, from.line), to: oldTo + 1});

                    else

                        changes.push({from: Math.max(from.line, oldTo), to: to.line + 1});

                }

            }

            sel.from = from; sel.to = to;

            selectionChanged = true;

        }

        function skipHidden(pos, oldLine, oldCh) {

            function getNonHidden(dir) {

                var lNo = pos.line + dir, end = dir == 1 ? doc.size : -1;

                while (lNo != end) {

                    var line = getLine(lNo);

                    if (!line.hidden) {

                        var ch = pos.ch;

                        if (ch > oldCh || ch > line.text.length) ch = line.text.length;

                        return {line: lNo, ch: ch};

                    }

                    lNo += dir;

                }

            }

            var line = getLine(pos.line);

            if (!line.hidden) return pos;

            if (pos.line >= oldLine) return getNonHidden(1) || getNonHidden(-1);

            else return getNonHidden(-1) || getNonHidden(1);

        }

        function setCursor(line, ch, user) {

            var pos = clipPos({line: line, ch: ch || 0});

            (user ? setSelectionUser : setSelection)(pos, pos);

        }



        function clipLine(n) {return Math.max(0, Math.min(n, doc.size-1));}

        function clipPos(pos) {

            if (pos.line < 0) return {line: 0, ch: 0};

            if (pos.line >= doc.size) return {line: doc.size-1, ch: getLine(doc.size-1).text.length};

            var ch = pos.ch, linelen = getLine(pos.line).text.length;

            if (ch == null || ch > linelen) return {line: pos.line, ch: linelen};

            else if (ch < 0) return {line: pos.line, ch: 0};

            else return pos;

        }



        function findPosH(dir, unit) {

            var end = sel.inverted ? sel.from : sel.to, line = end.line, ch = end.ch;

            var lineObj = getLine(line);

            function findNextLine() {

                for (var l = line + dir, e = dir < 0 ? -1 : doc.size; l != e; l += dir) {

                    var lo = getLine(l);

                    if (!lo.hidden) { line = l; lineObj = lo; return true; }

                }

            }

            function moveOnce(boundToLine) {

                if (ch == (dir < 0 ? 0 : lineObj.text.length)) {

                    if (!boundToLine && findNextLine()) ch = dir < 0 ? lineObj.text.length : 0;

                    else return false;

                } else ch += dir;

                return true;

            }

            if (unit == "char") moveOnce();

            else if (unit == "column") moveOnce(true);

            else if (unit == "word") {

                var sawWord = false;

                for (;;) {

                    if (dir < 0) if (!moveOnce()) break;

                    if (isWordChar(lineObj.text.charAt(ch))) sawWord = true;

                    else if (sawWord) {if (dir < 0) {dir = 1; moveOnce();} break;}

                    if (dir > 0) if (!moveOnce()) break;

                }

            }

            return {line: line, ch: ch};

        }

        function moveH(dir, unit) {

            var pos = dir < 0 ? sel.from : sel.to;

            if (shiftSelecting || posEq(sel.from, sel.to)) pos = findPosH(dir, unit);

            setCursor(pos.line, pos.ch, true);

        }

        function deleteH(dir, unit) {

            if (!posEq(sel.from, sel.to)) replaceRange("", sel.from, sel.to);

            else if (dir < 0) replaceRange("", findPosH(dir, unit), sel.to);

            else replaceRange("", sel.from, findPosH(dir, unit));

            userSelChange = true;

        }

        var goalColumn = null;

        function moveV(dir, unit) {

            var dist = 0, pos = localCoords(sel.inverted ? sel.from : sel.to, true);

            if (goalColumn != null) pos.x = goalColumn;

            if (unit == "page") dist = scroller.clientHeight;

            else if (unit == "line") dist = textHeight();

            var target = coordsChar(pos.x, pos.y + dist * dir + 2);

            setCursor(target.line, target.ch, true);

            goalColumn = pos.x;

        }



        function selectWordAt(pos) {

            var line = getLine(pos.line).text;

            var start = pos.ch, end = pos.ch;

            while (start > 0 && isWordChar(line.charAt(start - 1))) --start;

            while (end < line.length && isWordChar(line.charAt(end))) ++end;

            setSelectionUser({line: pos.line, ch: start}, {line: pos.line, ch: end});

        }

        function selectLine(line) {

            setSelectionUser({line: line, ch: 0}, {line: line, ch: getLine(line).text.length});

        }

        function indentSelected(mode) {

            if (posEq(sel.from, sel.to)) return indentLine(sel.from.line, mode);

            var e = sel.to.line - (sel.to.ch ? 0 : 1);

            for (var i = sel.from.line; i <= e; ++i) indentLine(i, mode);

        }



        function indentLine(n, how) {

            if (!how) how = "add";

            if (how == "smart") {

                if (!mode.indent) how = "prev";

                else var state = getStateBefore(n);

            }



            var line = getLine(n), curSpace = line.indentation(options.tabSize),

                curSpaceString = line.text.match(/^\s*/)[0], indentation;

            if (how == "prev") {

                if (n) indentation = getLine(n-1).indentation(options.tabSize);

                else indentation = 0;

            }

            else if (how == "smart") indentation = mode.indent(state, line.text.slice(curSpaceString.length), line.text);

            else if (how == "add") indentation = curSpace + options.indentUnit;

            else if (how == "subtract") indentation = curSpace - options.indentUnit;

            indentation = Math.max(0, indentation);

            var diff = indentation - curSpace;



            if (!diff) {

                if (sel.from.line != n && sel.to.line != n) return;

                var indentString = curSpaceString;

            }

            else {

                var indentString = "", pos = 0;

                if (options.indentWithTabs)

                    for (var i = Math.floor(indentation / options.tabSize); i; --i) {pos += options.tabSize; indentString += "\t";}

                while (pos < indentation) {++pos; indentString += " ";}

            }



            replaceRange(indentString, {line: n, ch: 0}, {line: n, ch: curSpaceString.length});

        }



        function loadMode() {

            mode = CodeMirror.getMode(options, options.mode);

            doc.iter(0, doc.size, function(line) { line.stateAfter = null; });

            work = [0];

            startWorker();

        }

        function gutterChanged() {

            var visible = options.gutter || options.lineNumbers;

            gutter.style.display = visible ? "" : "none";

            if (visible) gutterDirty = true;

            else lineDiv.parentNode.style.marginLeft = 0;

        }

        function wrappingChanged(from, to) {

            if (options.lineWrapping) {

                wrapper.className += " CodeMirror-wrap";

                var perLine = scroller.clientWidth / charWidth() - 3;

                doc.iter(0, doc.size, function(line) {

                    if (line.hidden) return;

                    var guess = Math.ceil(line.text.length / perLine) || 1;

                    if (guess != 1) updateLineHeight(line, guess);

                });

                lineSpace.style.width = code.style.width = "";

            } else {

                wrapper.className = wrapper.className.replace(" CodeMirror-wrap", "");

                maxWidth = null; maxLine = "";

                doc.iter(0, doc.size, function(line) {

                    if (line.height != 1 && !line.hidden) updateLineHeight(line, 1);

                    if (line.text.length > maxLine.length) maxLine = line.text;

                });

            }

            changes.push({from: 0, to: doc.size});

        }

        function computeTabText() {

            for (var str = '<span class="cm-tab">', i = 0; i < options.tabSize; ++i) str += " ";

            return str + "</span>";

        }

        function tabsChanged() {

            tabText = computeTabText();

            updateDisplay(true);

        }

        function themeChanged() {

            scroller.className = scroller.className.replace(/\s*cm-s-\w+/g, "") +

                options.theme.replace(/(^|\s)\s*/g, " cm-s-");

        }



        function TextMarker() { this.set = []; }

        TextMarker.prototype.clear = operation(function() {

            var min = Infinity, max = -Infinity;

            for (var i = 0, e = this.set.length; i < e; ++i) {

                var line = this.set[i], mk = line.marked;

                if (!mk || !line.parent) continue;

                var lineN = lineNo(line);

                min = Math.min(min, lineN); max = Math.max(max, lineN);

                for (var j = 0; j < mk.length; ++j)

                    if (mk[j].set == this.set) mk.splice(j--, 1);

            }

            if (min != Infinity)

                changes.push({from: min, to: max + 1});

        });

        TextMarker.prototype.find = function() {

            var from, to;

            for (var i = 0, e = this.set.length; i < e; ++i) {

                var line = this.set[i], mk = line.marked;

                for (var j = 0; j < mk.length; ++j) {

                    var mark = mk[j];

                    if (mark.set == this.set) {

                        if (mark.from != null || mark.to != null) {

                            var found = lineNo(line);

                            if (found != null) {

                                if (mark.from != null) from = {line: found, ch: mark.from};

                                if (mark.to != null) to = {line: found, ch: mark.to};

                            }

                        }

                    }

                }

            }

            return {from: from, to: to};

        };



        function markText(from, to, className) {

            from = clipPos(from); to = clipPos(to);

            var tm = new TextMarker();

            function add(line, from, to, className) {

                getLine(line).addMark(new MarkedText(from, to, className, tm.set));

            }

            if (from.line == to.line) add(from.line, from.ch, to.ch, className);

            else {

                add(from.line, from.ch, null, className);

                for (var i = from.line + 1, e = to.line; i < e; ++i)

                    add(i, null, null, className);

                add(to.line, null, to.ch, className);

            }

            changes.push({from: from.line, to: to.line + 1});

            return tm;

        }



        function setBookmark(pos) {

            pos = clipPos(pos);

            var bm = new Bookmark(pos.ch);

            getLine(pos.line).addMark(bm);

            return bm;

        }



        function addGutterMarker(line, text, className) {

            if (typeof line == "number") line = getLine(clipLine(line));

            line.gutterMarker = {text: text, style: className};

            gutterDirty = true;

            return line;

        }

        function removeGutterMarker(line) {

            if (typeof line == "number") line = getLine(clipLine(line));

            line.gutterMarker = null;

            gutterDirty = true;

        }



        function changeLine(handle, op) {

            var no = handle, line = handle;

            if (typeof handle == "number") line = getLine(clipLine(handle));

            else no = lineNo(handle);

            if (no == null) return null;

            if (op(line, no)) changes.push({from: no, to: no + 1});

            else return null;

            return line;

        }

        function setLineClass(handle, className) {

            return changeLine(handle, function(line) {

                if (line.className != className) {

                    line.className = className;

                    return true;

                }

            });

        }

        function setLineHidden(handle, hidden) {

            return changeLine(handle, function(line, no) {

                if (line.hidden != hidden) {

                    line.hidden = hidden;

                    updateLineHeight(line, hidden ? 0 : 1);

                    if (hidden && (sel.from.line == no || sel.to.line == no))

                        setSelection(skipHidden(sel.from, sel.from.line, sel.from.ch),

                            skipHidden(sel.to, sel.to.line, sel.to.ch));

                    return (gutterDirty = true);

                }

            });

        }



        function lineInfo(line) {

            if (typeof line == "number") {

                if (!isLine(line)) return null;

                var n = line;

                line = getLine(line);

                if (!line) return null;

            }

            else {

                var n = lineNo(line);

                if (n == null) return null;

            }

            var marker = line.gutterMarker;

            return {line: n, handle: line, text: line.text, markerText: marker && marker.text,

                markerClass: marker && marker.style, lineClass: line.className};

        }



        function stringWidth(str) {

            measure.innerHTML = "<pre><span>x</span></pre>";

            measure.firstChild.firstChild.firstChild.nodeValue = str;

            return measure.firstChild.firstChild.offsetWidth || 10;

        }

        // These are used to go from pixel positions to character

        // positions, taking varying character widths into account.

        function charFromX(line, x) {

            if (x <= 0) return 0;

            var lineObj = getLine(line), text = lineObj.text;

            function getX(len) {

                measure.innerHTML = "<pre><span>" + lineObj.getHTML(null, null, false, tabText, len) + "</span></pre>";

                return measure.firstChild.firstChild.offsetWidth;

            }

            var from = 0, fromX = 0, to = text.length, toX;

            // Guess a suitable upper bound for our search.

            var estimated = Math.min(to, Math.ceil(x / charWidth()));

            for (;;) {

                var estX = getX(estimated);

                if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));

                else {toX = estX; to = estimated; break;}

            }

            if (x > toX) return to;

            // Try to guess a suitable lower bound as well.

            estimated = Math.floor(to * 0.8); estX = getX(estimated);

            if (estX < x) {from = estimated; fromX = estX;}

            // Do a binary search between these bounds.

            for (;;) {

                if (to - from <= 1) return (toX - x > x - fromX) ? from : to;

                var middle = Math.ceil((from + to) / 2), middleX = getX(middle);

                if (middleX > x) {to = middle; toX = middleX;}

                else {from = middle; fromX = middleX;}

            }

        }



        var tempId = Math.floor(Math.random() * 0xffffff).toString(16);

        function measureLine(line, ch) {

            var extra = "";

            // Include extra text at the end to make sure the measured line is wrapped in the right way.

            if (options.lineWrapping) {

                var end = line.text.indexOf(" ", ch + 2);

                extra = htmlEscape(line.text.slice(ch + 1, end < 0 ? line.text.length : end + (ie ? 5 : 0)));

            }

            measure.innerHTML = "<pre>" + line.getHTML(null, null, false, tabText, ch) +

                '<span id="CodeMirror-temp-' + tempId + '">' + htmlEscape(line.text.charAt(ch) || " ") + "</span>" +

                extra + "</pre>";

            var elt = document.getElementById("CodeMirror-temp-" + tempId);

            var top = elt.offsetTop, left = elt.offsetLeft;

            // Older IEs report zero offsets for spans directly after a wrap

            if (ie && ch && top == 0 && left == 0) {

                var backup = document.createElement("span");

                backup.innerHTML = "x";

                elt.parentNode.insertBefore(backup, elt.nextSibling);

                top = backup.offsetTop;

            }

            return {top: top, left: left};

        }

        function localCoords(pos, inLineWrap) {

            var x, lh = textHeight(), y = lh * (heightAtLine(doc, pos.line) - (inLineWrap ? displayOffset : 0));

            if (pos.ch == 0) x = 0;

            else {

                var sp = measureLine(getLine(pos.line), pos.ch);

                x = sp.left;

                if (options.lineWrapping) y += Math.max(0, sp.top);

            }

            return {x: x, y: y, yBot: y + lh};

        }

        // Coords must be lineSpace-local

        function coordsChar(x, y) {

            if (y < 0) y = 0;

            var th = textHeight(), cw = charWidth(), heightPos = displayOffset + Math.floor(y / th);

            var lineNo = lineAtHeight(doc, heightPos);

            if (lineNo >= doc.size) return {line: doc.size - 1, ch: getLine(doc.size - 1).text.length};

            var lineObj = getLine(lineNo), text = lineObj.text;

            var tw = options.lineWrapping, innerOff = tw ? heightPos - heightAtLine(doc, lineNo) : 0;

            if (x <= 0 && innerOff == 0) return {line: lineNo, ch: 0};

            function getX(len) {

                var sp = measureLine(lineObj, len);

                if (tw) {

                    var off = Math.round(sp.top / th);

                    return Math.max(0, sp.left + (off - innerOff) * scroller.clientWidth);

                }

                return sp.left;

            }

            var from = 0, fromX = 0, to = text.length, toX;

            // Guess a suitable upper bound for our search.

            var estimated = Math.min(to, Math.ceil((x + innerOff * scroller.clientWidth * .9) / cw));

            for (;;) {

                var estX = getX(estimated);

                if (estX <= x && estimated < to) estimated = Math.min(to, Math.ceil(estimated * 1.2));

                else {toX = estX; to = estimated; break;}

            }

            if (x > toX) return {line: lineNo, ch: to};

            // Try to guess a suitable lower bound as well.

            estimated = Math.floor(to * 0.8); estX = getX(estimated);

            if (estX < x) {from = estimated; fromX = estX;}

            // Do a binary search between these bounds.

            for (;;) {

                if (to - from <= 1) return {line: lineNo, ch: (toX - x > x - fromX) ? from : to};

                var middle = Math.ceil((from + to) / 2), middleX = getX(middle);

                if (middleX > x) {to = middle; toX = middleX;}

                else {from = middle; fromX = middleX;}

            }

        }

        function pageCoords(pos) {

            var local = localCoords(pos, true), off = eltOffset(lineSpace);

            return {x: off.left + local.x, y: off.top + local.y, yBot: off.top + local.yBot};

        }



        var cachedHeight, cachedHeightFor, measureText;

        function textHeight() {

            if (measureText == null) {

                measureText = "<pre>";

                for (var i = 0; i < 49; ++i) measureText += "x<br/>";

                measureText += "x</pre>";

            }

            var offsetHeight = lineDiv.clientHeight;

            if (offsetHeight == cachedHeightFor) return cachedHeight;

            cachedHeightFor = offsetHeight;

            measure.innerHTML = measureText;

            cachedHeight = measure.firstChild.offsetHeight / 50 || 1;

            measure.innerHTML = "";

            return cachedHeight;

        }

        var cachedWidth, cachedWidthFor = 0;

        function charWidth() {

            if (scroller.clientWidth == cachedWidthFor) return cachedWidth;

            cachedWidthFor = scroller.clientWidth;

            return (cachedWidth = stringWidth("x"));

        }

        function paddingTop() {return lineSpace.offsetTop;}

        function paddingLeft() {return lineSpace.offsetLeft;}



        function posFromMouse(e, liberal) {

            var offW = eltOffset(scroller, true), x, y;

            // Fails unpredictably on IE[67] when mouse is dragged around quickly.

            try { x = e.clientX; y = e.clientY; } catch (e) { return null; }

            // This is a mess of a heuristic to try and determine whether a

            // scroll-bar was clicked or not, and to return null if one was

            // (and !liberal).

            if (!liberal && (x - offW.left > scroller.clientWidth || y - offW.top > scroller.clientHeight))

                return null;

            var offL = eltOffset(lineSpace, true);

            return coordsChar(x - offL.left, y - offL.top);

        }

        function onContextMenu(e) {

            var pos = posFromMouse(e);

            if (!pos || window.opera) return; // Opera is difficult.

            if (posEq(sel.from, sel.to) || posLess(pos, sel.from) || !posLess(pos, sel.to))

                operation(setCursor)(pos.line, pos.ch);



            var oldCSS = input.style.cssText;

            inputDiv.style.position = "absolute";

            input.style.cssText = "position: fixed; width: 30px; height: 30px; top: " + (e.clientY - 5) +

                "px; left: " + (e.clientX - 5) + "px; z-index: 1000; background: white; " +

                "border-width: 0; outline: none; overflow: hidden; opacity: .05; filter: alpha(opacity=5);";

            leaveInputAlone = true;

            var val = input.value = getSelection();

            focusInput();

            input.select();

            function rehide() {

                var newVal = splitLines(input.value).join("\n");

                if (newVal != val) operation(replaceSelection)(newVal, "end");

                inputDiv.style.position = "relative";

                input.style.cssText = oldCSS;

                leaveInputAlone = false;

                resetInput(true);

                slowPoll();

            }



            if (gecko) {

                e_stop(e);

                var mouseup = connect(window, "mouseup", function() {

                    mouseup();

                    setTimeout(rehide, 20);

                }, true);

            }

            else {

                setTimeout(rehide, 50);

            }

        }



        // Cursor-blinking

        function restartBlink() {

            clearInterval(blinker);

            var on = true;

            cursor.style.visibility = "";

            blinker = setInterval(function() {

                cursor.style.visibility = (on = !on) ? "" : "hidden";

            }, 650);

        }



        var matching = {"(": ")>", ")": "(<", "[": "]>", "]": "[<", "{": "}>", "}": "{<"};

        function matchBrackets(autoclear) {

            var head = sel.inverted ? sel.from : sel.to, line = getLine(head.line), pos = head.ch - 1;

            var match = (pos >= 0 && matching[line.text.charAt(pos)]) || matching[line.text.charAt(++pos)];

            if (!match) return;

            var ch = match.charAt(0), forward = match.charAt(1) == ">", d = forward ? 1 : -1, st = line.styles;

            for (var off = pos + 1, i = 0, e = st.length; i < e; i+=2)

                if ((off -= st[i].length) <= 0) {var style = st[i+1]; break;}



            var stack = [line.text.charAt(pos)], re = /[(){}[\]]/;

            function scan(line, from, to) {

                if (!line.text) return;

                var st = line.styles, pos = forward ? 0 : line.text.length - 1, cur;

                for (var i = forward ? 0 : st.length - 2, e = forward ? st.length : -2; i != e; i += 2*d) {

                    var text = st[i];

                    if (st[i+1] != null && st[i+1] != style) {pos += d * text.length; continue;}

                    for (var j = forward ? 0 : text.length - 1, te = forward ? text.length : -1; j != te; j += d, pos+=d) {

                        if (pos >= from && pos < to && re.test(cur = text.charAt(j))) {

                            var match = matching[cur];

                            if (match.charAt(1) == ">" == forward) stack.push(cur);

                            else if (stack.pop() != match.charAt(0)) return {pos: pos, match: false};

                            else if (!stack.length) return {pos: pos, match: true};

                        }

                    }

                }

            }

            for (var i = head.line, e = forward ? Math.min(i + 100, doc.size) : Math.max(-1, i - 100); i != e; i+=d) {

                var line = getLine(i), first = i == head.line;

                var found = scan(line, first && forward ? pos + 1 : 0, first && !forward ? pos : line.text.length);

                if (found) break;

            }

            if (!found) found = {pos: null, match: false};

            var style = found.match ? "CodeMirror-matchingbracket" : "CodeMirror-nonmatchingbracket";

            var one = markText({line: head.line, ch: pos}, {line: head.line, ch: pos+1}, style),

                two = found.pos != null && markText({line: i, ch: found.pos}, {line: i, ch: found.pos + 1}, style);

            var clear = operation(function(){one.clear(); two && two.clear();});

            if (autoclear) setTimeout(clear, 800);

            else bracketHighlighted = clear;

        }



        // Finds the line to start with when starting a parse. Tries to

        // find a line with a stateAfter, so that it can start with a

        // valid state. If that fails, it returns the line with the

        // smallest indentation, which tends to need the least context to

        // parse correctly.

        function findStartLine(n) {

            var minindent, minline;

            for (var search = n, lim = n - 40; search > lim; --search) {

                if (search == 0) return 0;

                var line = getLine(search-1);

                if (line.stateAfter) return search;

                var indented = line.indentation(options.tabSize);

                if (minline == null || minindent > indented) {

                    minline = search - 1;

                    minindent = indented;

                }

            }

            return minline;

        }

        function getStateBefore(n) {

            var start = findStartLine(n), state = start && getLine(start-1).stateAfter;

            if (!state) state = startState(mode);

            else state = copyState(mode, state);

            doc.iter(start, n, function(line) {

                line.highlight(mode, state, options.tabSize);

                line.stateAfter = copyState(mode, state);

            });

            if (start < n) changes.push({from: start, to: n});

            if (n < doc.size && !getLine(n).stateAfter) work.push(n);

            return state;

        }

        function highlightLines(start, end) {

            var state = getStateBefore(start);

            doc.iter(start, end, function(line) {

                line.highlight(mode, state, options.tabSize);

                line.stateAfter = copyState(mode, state);

            });

        }

        function highlightWorker() {

            var end = +new Date + options.workTime;

            var foundWork = work.length;

            while (work.length) {

                if (!getLine(showingFrom).stateAfter) var task = showingFrom;

                else var task = work.pop();

                if (task >= doc.size) continue;

                var start = findStartLine(task), state = start && getLine(start-1).stateAfter;

                if (state) state = copyState(mode, state);

                else state = startState(mode);



                var unchanged = 0, compare = mode.compareStates, realChange = false,

                    i = start, bail = false;

                doc.iter(i, doc.size, function(line) {

                    var hadState = line.stateAfter;

                    if (+new Date > end) {

                        work.push(i);

                        startWorker(options.workDelay);

                        if (realChange) changes.push({from: task, to: i + 1});

                        return (bail = true);

                    }

                    var changed = line.highlight(mode, state, options.tabSize);

                    if (changed) realChange = true;

                    line.stateAfter = copyState(mode, state);

                    if (compare) {

                        if (hadState && compare(hadState, state)) return true;

                    } else {

                        if (changed !== false || !hadState) unchanged = 0;

                        else if (++unchanged > 3 && (!mode.indent || mode.indent(hadState, "") == mode.indent(state, "")))

                            return true;

                    }

                    ++i;

                });

                if (bail) return;

                if (realChange) changes.push({from: task, to: i + 1});

            }

            if (foundWork && options.onHighlightComplete)

                options.onHighlightComplete(instance);

        }

        function startWorker(time) {

            if (!work.length) return;

            highlight.set(time, operation(highlightWorker));

        }



        // Operations are used to wrap changes in such a way that each

        // change won't have to update the cursor and display (which would

        // be awkward, slow, and error-prone), but instead updates are

        // batched and then all combined and executed at once.

        function startOperation() {

            updateInput = userSelChange = textChanged = null;

            changes = []; selectionChanged = false; callbacks = [];

        }

        function endOperation() {

            var reScroll = false, updated;

            if (selectionChanged) reScroll = !scrollCursorIntoView();

            if (changes.length) updated = updateDisplay(changes, true);

            else {

                if (selectionChanged) updateCursor();

                if (gutterDirty) updateGutter();

            }

            if (reScroll) scrollCursorIntoView();

            if (selectionChanged) {scrollEditorIntoView(); restartBlink();}



            if (focused && !leaveInputAlone &&

                (updateInput === true || (updateInput !== false && selectionChanged)))

                resetInput(userSelChange);



            if (selectionChanged && options.matchBrackets)

                setTimeout(operation(function() {

                    if (bracketHighlighted) {bracketHighlighted(); bracketHighlighted = null;}

                    if (posEq(sel.from, sel.to)) matchBrackets(false);

                }), 20);

            var tc = textChanged, cbs = callbacks; // these can be reset by callbacks

            if (selectionChanged && options.onCursorActivity)

                options.onCursorActivity(instance);

            if (tc && options.onChange && instance)

                options.onChange(instance, tc);

            for (var i = 0; i < cbs.length; ++i) cbs[i](instance);

            if (updated && options.onUpdate) options.onUpdate(instance);

        }

        var nestedOperation = 0;

        function operation(f) {

            return function() {

                if (!nestedOperation++) startOperation();

                try {var result = f.apply(this, arguments);}

                finally {if (!--nestedOperation) endOperation();}

                return result;

            };

        }



        for (var ext in extensions)

            if (extensions.propertyIsEnumerable(ext) &&

                !instance.propertyIsEnumerable(ext))

                instance[ext] = extensions[ext];

        return instance;

    } // (end of function CodeMirror)



    // The default configuration options.

    CodeMirror.defaults = {

        value: "",

        mode: null,

        theme: "default",

        indentUnit: 2,

        indentWithTabs: false,

        tabSize: 4,

        keyMap: "default",

        extraKeys: null,

        electricChars: true,

        onKeyEvent: null,

        lineWrapping: false,

        lineNumbers: false,

        gutter: false,

        fixedGutter: false,

        firstLineNumber: 1,

        readOnly: false,

        onChange: null,

        onCursorActivity: null,

        onGutterClick: null,

        onHighlightComplete: null,

        onUpdate: null,

        onFocus: null, onBlur: null, onScroll: null,

        matchBrackets: false,

        workTime: 100,

        workDelay: 200,

        pollInterval: 100,

        undoDepth: 40,

        tabindex: null,

        document: window.document

    };



    var mac = /Mac/.test(navigator.platform);

    var win = /Win/.test(navigator.platform);



    // Known modes, by name and by MIME

    var modes = {}, mimeModes = {};

    CodeMirror.defineMode = function(name, mode) {

        if (!CodeMirror.defaults.mode && name != "null") CodeMirror.defaults.mode = name;

        modes[name] = mode;

    };

    CodeMirror.defineMIME = function(mime, spec) {

        mimeModes[mime] = spec;

    };

    CodeMirror.getMode = function(options, spec) {

        if (typeof spec == "string" && mimeModes.hasOwnProperty(spec))

            spec = mimeModes[spec];

        if (typeof spec == "string")

            var mname = spec, config = {};

        else if (spec != null)

            var mname = spec.name, config = spec;

        var mfactory = modes[mname];

        if (!mfactory) {

            if (window.console) console.warn("No mode " + mname + " found, falling back to plain text.");

            return CodeMirror.getMode(options, "text/plain");

        }

        return mfactory(options, config || {});

    };

    CodeMirror.listModes = function() {

        var list = [];

        for (var m in modes)

            if (modes.propertyIsEnumerable(m)) list.push(m);

        return list;

    };

    CodeMirror.listMIMEs = function() {

        var list = [];

        for (var m in mimeModes)

            if (mimeModes.propertyIsEnumerable(m)) list.push({mime: m, mode: mimeModes[m]});

        return list;

    };



    var extensions = CodeMirror.extensions = {};

    CodeMirror.defineExtension = function(name, func) {

        extensions[name] = func;

    };



    var commands = CodeMirror.commands = {

        selectAll: function(cm) {cm.setSelection({line: 0, ch: 0}, {line: cm.lineCount() - 1});},

        killLine: function(cm) {

            var from = cm.getCursor(true), to = cm.getCursor(false), sel = !posEq(from, to);

            if (!sel && cm.getLine(from.line).length == from.ch) cm.replaceRange("", from, {line: from.line + 1, ch: 0});

            else cm.replaceRange("", from, sel ? to : {line: from.line});

        },

        deleteLine: function(cm) {var l = cm.getCursor().line; cm.replaceRange("", {line: l, ch: 0}, {line: l});},

        undo: function(cm) {cm.undo();},

        redo: function(cm) {cm.redo();},

        goDocStart: function(cm) {cm.setCursor(0, 0, true);},

        goDocEnd: function(cm) {cm.setSelection({line: cm.lineCount() - 1}, null, true);},

        goLineStart: function(cm) {cm.setCursor(cm.getCursor().line, 0, true);},

        goLineStartSmart: function(cm) {

            var cur = cm.getCursor();

            var text = cm.getLine(cur.line), firstNonWS = Math.max(0, text.search(/\S/));

            cm.setCursor(cur.line, cur.ch <= firstNonWS && cur.ch ? 0 : firstNonWS, true);

        },

        goLineEnd: function(cm) {cm.setSelection({line: cm.getCursor().line}, null, true);},

        goLineUp: function(cm) {cm.moveV(-1, "line");},

        goLineDown: function(cm) {cm.moveV(1, "line");},

        goPageUp: function(cm) {cm.moveV(-1, "page");},

        goPageDown: function(cm) {cm.moveV(1, "page");},

        goCharLeft: function(cm) {cm.moveH(-1, "char");},

        goCharRight: function(cm) {cm.moveH(1, "char");},

        goColumnLeft: function(cm) {cm.moveH(-1, "column");},

        goColumnRight: function(cm) {cm.moveH(1, "column");},

        goWordLeft: function(cm) {cm.moveH(-1, "word");},

        goWordRight: function(cm) {cm.moveH(1, "word");},

        delCharLeft: function(cm) {cm.deleteH(-1, "char");},

        delCharRight: function(cm) {cm.deleteH(1, "char");},

        delWordLeft: function(cm) {cm.deleteH(-1, "word");},

        delWordRight: function(cm) {cm.deleteH(1, "word");},

        indentAuto: function(cm) {cm.indentSelection("smart");},

        indentMore: function(cm) {cm.indentSelection("add");},

        indentLess: function(cm) {cm.indentSelection("subtract");},

        insertTab: function(cm) {cm.replaceSelection("\t", "end");},

        transposeChars: function(cm) {

            var cur = cm.getCursor(), line = cm.getLine(cur.line);

            if (cur.ch > 0 && cur.ch < line.length - 1)

                cm.replaceRange(line.charAt(cur.ch) + line.charAt(cur.ch - 1),

                    {line: cur.line, ch: cur.ch - 1}, {line: cur.line, ch: cur.ch + 1});

        },

        newlineAndIndent: function(cm) {

            cm.replaceSelection("\n", "end");

            cm.indentLine(cm.getCursor().line);

        },

        toggleOverwrite: function(cm) {cm.toggleOverwrite();}

    };



    var keyMap = CodeMirror.keyMap = {};

    keyMap.basic = {

        "Left": "goCharLeft", "Right": "goCharRight", "Up": "goLineUp", "Down": "goLineDown",

        "End": "goLineEnd", "Home": "goLineStartSmart", "PageUp": "goPageUp", "PageDown": "goPageDown",

        "Delete": "delCharRight", "Backspace": "delCharLeft", "Tab": "indentMore", "Shift-Tab": "indentLess",

        "Enter": "newlineAndIndent", "Insert": "toggleOverwrite"

    };

    // Note that the save and find-related commands aren't defined by

    // default. Unknown commands are simply ignored.

    keyMap.pcDefault = {

        "Ctrl-A": "selectAll", "Ctrl-D": "deleteLine", "Ctrl-Z": "undo", "Shift-Ctrl-Z": "redo", "Ctrl-Y": "redo",

        "Ctrl-Home": "goDocStart", "Alt-Up": "goDocStart", "Ctrl-End": "goDocEnd", "Ctrl-Down": "goDocEnd",

        "Ctrl-Left": "goWordLeft", "Ctrl-Right": "goWordRight", "Alt-Left": "goLineStart", "Alt-Right": "goLineEnd",

        "Ctrl-Backspace": "delWordLeft", "Ctrl-Delete": "delWordRight", "Ctrl-S": "save", "Ctrl-F": "find",

        "Ctrl-G": "findNext", "Shift-Ctrl-G": "findPrev", "Shift-Ctrl-F": "replace", "Shift-Ctrl-R": "replaceAll",

        fallthrough: "basic"

    };

    keyMap.macDefault = {

        "Cmd-A": "selectAll", "Cmd-D": "deleteLine", "Cmd-Z": "undo", "Shift-Cmd-Z": "redo", "Cmd-Y": "redo",

        "Cmd-Up": "goDocStart", "Cmd-End": "goDocEnd", "Cmd-Down": "goDocEnd", "Alt-Left": "goWordLeft",

        "Alt-Right": "goWordRight", "Cmd-Left": "goLineStart", "Cmd-Right": "goLineEnd", "Alt-Backspace": "delWordLeft",

        "Ctrl-Alt-Backspace": "delWordRight", "Alt-Delete": "delWordRight", "Cmd-S": "save", "Cmd-F": "find",

        "Cmd-G": "findNext", "Shift-Cmd-G": "findPrev", "Cmd-Alt-F": "replace", "Shift-Cmd-Alt-F": "replaceAll",

        fallthrough: ["basic", "emacsy"]

    };

    keyMap["default"] = mac ? keyMap.macDefault : keyMap.pcDefault;

    keyMap.emacsy = {

        "Ctrl-F": "goCharRight", "Ctrl-B": "goCharLeft", "Ctrl-P": "goLineUp", "Ctrl-N": "goLineDown",

        "Alt-F": "goWordRight", "Alt-B": "goWordLeft", "Ctrl-A": "goLineStart", "Ctrl-E": "goLineEnd",

        "Ctrl-V": "goPageUp", "Shift-Ctrl-V": "goPageDown", "Ctrl-D": "delCharRight", "Ctrl-H": "delCharLeft",

        "Alt-D": "delWordRight", "Alt-Backspace": "delWordLeft", "Ctrl-K": "killLine", "Ctrl-T": "transposeChars"

    };



    function lookupKey(name, extraMap, map) {

        function lookup(name, map, ft) {

            var found = map[name];

            if (found != null) return found;

            if (ft == null) ft = map.fallthrough;

            if (ft == null) return map.catchall;

            if (typeof ft == "string") return lookup(name, keyMap[ft]);

            for (var i = 0, e = ft.length; i < e; ++i) {

                found = lookup(name, keyMap[ft[i]]);

                if (found != null) return found;

            }

            return null;

        }

        return extraMap ? lookup(name, extraMap, map) : lookup(name, keyMap[map]);

    }

    function isModifierKey(event) {

        var name = keyNames[event.keyCode];

        return name == "Ctrl" || name == "Alt" || name == "Shift" || name == "Mod";

    }



    CodeMirror.fromTextArea = function(textarea, options) {

        if (!options) options = {};

        options.value = textarea.value;

        if (!options.tabindex && textarea.tabindex)

            options.tabindex = textarea.tabindex;



        function save() {textarea.value = instance.getValue();}

        if (textarea.form) {

            // Deplorable hack to make the submit method do the right thing.

            var rmSubmit = connect(textarea.form, "submit", save, true);

            if (typeof textarea.form.submit == "function") {

                var realSubmit = textarea.form.submit;

                function wrappedSubmit() {

                    save();

                    textarea.form.submit = realSubmit;

                    textarea.form.submit();

                    textarea.form.submit = wrappedSubmit;

                }

                textarea.form.submit = wrappedSubmit;

            }

        }



        textarea.style.display = "none";

        var instance = CodeMirror(function(node) {

            textarea.parentNode.insertBefore(node, textarea.nextSibling);

        }, options);

        instance.save = save;

        instance.getTextArea = function() { return textarea; };

        instance.toTextArea = function() {

            save();

            textarea.parentNode.removeChild(instance.getWrapperElement());

            textarea.style.display = "";

            if (textarea.form) {

                rmSubmit();

                if (typeof textarea.form.submit == "function")

                    textarea.form.submit = realSubmit;

            }

        };

        return instance;

    };



    // Utility functions for working with state. Exported because modes

    // sometimes need to do this.

    function copyState(mode, state) {

        if (state === true) return state;

        if (mode.copyState) return mode.copyState(state);

        var nstate = {};

        for (var n in state) {

            var val = state[n];

            if (val instanceof Array) val = val.concat([]);

            nstate[n] = val;

        }

        return nstate;

    }

    CodeMirror.copyState = copyState;

    function startState(mode, a1, a2) {

        return mode.startState ? mode.startState(a1, a2) : true;

    }

    CodeMirror.startState = startState;



    // The character stream used by a mode's parser.

    function StringStream(string, tabSize) {

        this.pos = this.start = 0;

        this.string = string;

        this.tabSize = tabSize || 8;

    }

    StringStream.prototype = {

        eol: function() {return this.pos >= this.string.length;},

        sol: function() {return this.pos == 0;},

        peek: function() {return this.string.charAt(this.pos);},

        next: function() {

            if (this.pos < this.string.length)

                return this.string.charAt(this.pos++);

        },

        eat: function(match) {

            var ch = this.string.charAt(this.pos);

            if (typeof match == "string") var ok = ch == match;

            else var ok = ch && (match.test ? match.test(ch) : match(ch));

            if (ok) {++this.pos; return ch;}

        },

        eatWhile: function(match) {

            var start = this.pos;

            while (this.eat(match)){}

            return this.pos > start;

        },

        eatSpace: function() {

            var start = this.pos;

            while (/[\s\u00a0]/.test(this.string.charAt(this.pos))) ++this.pos;

            return this.pos > start;

        },

        skipToEnd: function() {this.pos = this.string.length;},

        skipTo: function(ch) {

            var found = this.string.indexOf(ch, this.pos);

            if (found > -1) {this.pos = found; return true;}

        },

        backUp: function(n) {this.pos -= n;},

        column: function() {return countColumn(this.string, this.start, this.tabSize);},

        indentation: function() {return countColumn(this.string, null, this.tabSize);},

        match: function(pattern, consume, caseInsensitive) {

            if (typeof pattern == "string") {

                function cased(str) {return caseInsensitive ? str.toLowerCase() : str;}

                if (cased(this.string).indexOf(cased(pattern), this.pos) == this.pos) {

                    if (consume !== false) this.pos += pattern.length;

                    return true;

                }

            }

            else {

                var match = this.string.slice(this.pos).match(pattern);

                if (match && consume !== false) this.pos += match[0].length;

                return match;

            }

        },

        current: function(){return this.string.slice(this.start, this.pos);}

    };

    CodeMirror.StringStream = StringStream;



    function MarkedText(from, to, className, set) {

        this.from = from; this.to = to; this.style = className; this.set = set;

    }

    MarkedText.prototype = {

        attach: function(line) { this.set.push(line); },

        detach: function(line) {

            var ix = indexOf(this.set, line);

            if (ix > -1) this.set.splice(ix, 1);

        },

        split: function(pos, lenBefore) {

            if (this.to <= pos && this.to != null) return null;

            var from = this.from < pos || this.from == null ? null : this.from - pos + lenBefore;

            var to = this.to == null ? null : this.to - pos + lenBefore;

            return new MarkedText(from, to, this.style, this.set);

        },

        dup: function() { return new MarkedText(null, null, this.style, this.set); },

        clipTo: function(fromOpen, from, toOpen, to, diff) {

            if (this.from != null && this.from >= from)

                this.from = Math.max(to, this.from) + diff;

            if (this.to != null && this.to > from)

                this.to = to < this.to ? this.to + diff : from;

            if (fromOpen && to > this.from && (to < this.to || this.to == null))

                this.from = null;

            if (toOpen && (from < this.to || this.to == null) && (from > this.from || this.from == null))

                this.to = null;

        },

        isDead: function() { return this.from != null && this.to != null && this.from >= this.to; },

        sameSet: function(x) { return this.set == x.set; }

    };



    function Bookmark(pos) {

        this.from = pos; this.to = pos; this.line = null;

    }

    Bookmark.prototype = {

        attach: function(line) { this.line = line; },

        detach: function(line) { if (this.line == line) this.line = null; },

        split: function(pos, lenBefore) {

            if (pos < this.from) {

                this.from = this.to = (this.from - pos) + lenBefore;

                return this;

            }

        },

        isDead: function() { return this.from > this.to; },

        clipTo: function(fromOpen, from, toOpen, to, diff) {

            if ((fromOpen || from < this.from) && (toOpen || to > this.to)) {

                this.from = 0; this.to = -1;

            } else if (this.from > from) {

                this.from = this.to = Math.max(to, this.from) + diff;

            }

        },

        sameSet: function(x) { return false; },

        find: function() {

            if (!this.line || !this.line.parent) return null;

            return {line: lineNo(this.line), ch: this.from};

        },

        clear: function() {

            if (this.line) {

                var found = indexOf(this.line.marked, this);

                if (found != -1) this.line.marked.splice(found, 1);

                this.line = null;

            }

        }

    };



    // Line objects. These hold state related to a line, including

    // highlighting info (the styles array).

    function Line(text, styles) {

        this.styles = styles || [text, null];

        this.text = text;

        this.height = 1;

        this.marked = this.gutterMarker = this.className = this.handlers = null;

        this.stateAfter = this.parent = this.hidden = null;

    }

    Line.inheritMarks = function(text, orig) {

        var ln = new Line(text), mk = orig && orig.marked;

        if (mk) {

            for (var i = 0; i < mk.length; ++i) {

                if (mk[i].to == null && mk[i].style) {

                    var newmk = ln.marked || (ln.marked = []), mark = mk[i];

                    var nmark = mark.dup(); newmk.push(nmark); nmark.attach(ln);

                }

            }

        }

        return ln;

    }

    Line.prototype = {

        // Replace a piece of a line, keeping the styles around it intact.

        replace: function(from, to_, text) {

            var st = [], mk = this.marked, to = to_ == null ? this.text.length : to_;

            copyStyles(0, from, this.styles, st);

            if (text) st.push(text, null);

            copyStyles(to, this.text.length, this.styles, st);

            this.styles = st;

            this.text = this.text.slice(0, from) + text + this.text.slice(to);

            this.stateAfter = null;

            if (mk) {

                var diff = text.length - (to - from);

                for (var i = 0, mark = mk[i]; i < mk.length; ++i) {

                    mark.clipTo(from == null, from || 0, to_ == null, to, diff);

                    if (mark.isDead()) {mark.detach(this); mk.splice(i--, 1);}

                }

            }

        },

        // Split a part off a line, keeping styles and markers intact.

        split: function(pos, textBefore) {

            var st = [textBefore, null], mk = this.marked;

            copyStyles(pos, this.text.length, this.styles, st);

            var taken = new Line(textBefore + this.text.slice(pos), st);

            if (mk) {

                for (var i = 0; i < mk.length; ++i) {

                    var mark = mk[i];

                    var newmark = mark.split(pos, textBefore.length);

                    if (newmark) {

                        if (!taken.marked) taken.marked = [];

                        taken.marked.push(newmark); newmark.attach(taken);

                    }

                }

            }

            return taken;

        },

        append: function(line) {

            var mylen = this.text.length, mk = line.marked, mymk = this.marked;

            this.text += line.text;

            copyStyles(0, line.text.length, line.styles, this.styles);

            if (mymk) {

                for (var i = 0; i < mymk.length; ++i)

                    if (mymk[i].to == null) mymk[i].to = mylen;

            }

            if (mk && mk.length) {

                if (!mymk) this.marked = mymk = [];

                outer: for (var i = 0; i < mk.length; ++i) {

                    var mark = mk[i];

                    if (!mark.from) {

                        for (var j = 0; j < mymk.length; ++j) {

                            var mymark = mymk[j];

                            if (mymark.to == mylen && mymark.sameSet(mark)) {

                                mymark.to = mark.to == null ? null : mark.to + mylen;

                                if (mymark.isDead()) {

                                    mymark.detach(this);

                                    mk.splice(i--, 1);

                                }

                                continue outer;

                            }

                        }

                    }

                    mymk.push(mark);

                    mark.attach(this);

                    mark.from += mylen;

                    if (mark.to != null) mark.to += mylen;

                }

            }

        },

        fixMarkEnds: function(other) {

            var mk = this.marked, omk = other.marked;

            if (!mk) return;

            for (var i = 0; i < mk.length; ++i) {

                var mark = mk[i], close = mark.to == null;

                if (close && omk) {

                    for (var j = 0; j < omk.length; ++j)

                        if (omk[j].sameSet(mark)) {close = false; break;}

                }

                if (close) mark.to = this.text.length;

            }

        },

        fixMarkStarts: function() {

            var mk = this.marked;

            if (!mk) return;

            for (var i = 0; i < mk.length; ++i)

                if (mk[i].from == null) mk[i].from = 0;

        },

        addMark: function(mark) {

            mark.attach(this);

            if (this.marked == null) this.marked = [];

            this.marked.push(mark);

            this.marked.sort(function(a, b){return (a.from || 0) - (b.from || 0);});

        },

        // Run the given mode's parser over a line, update the styles

        // array, which contains alternating fragments of text and CSS

        // classes.

        highlight: function(mode, state, tabSize) {

            var stream = new StringStream(this.text, tabSize), st = this.styles, pos = 0;

            var changed = false, curWord = st[0], prevWord;

            if (this.text == "" && mode.blankLine) mode.blankLine(state);

            while (!stream.eol()) {

                var style = mode.token(stream, state);

                var substr = this.text.slice(stream.start, stream.pos);

                stream.start = stream.pos;

                if (pos && st[pos-1] == style)

                    st[pos-2] += substr;

                else if (substr) {

                    if (!changed && (st[pos+1] != style || (pos && st[pos-2] != prevWord))) changed = true;

                    st[pos++] = substr; st[pos++] = style;

                    prevWord = curWord; curWord = st[pos];

                }

                // Give up when line is ridiculously long

                if (stream.pos > 5000) {

                    st[pos++] = this.text.slice(stream.pos); st[pos++] = null;

                    break;

                }

            }

            if (st.length != pos) {st.length = pos; changed = true;}

            if (pos && st[pos-2] != prevWord) changed = true;

            // Short lines with simple highlights return null, and are

            // counted as changed by the driver because they are likely to

            // highlight the same way in various contexts.

            return changed || (st.length < 5 && this.text.length < 10 ? null : false);

        },

        // Fetch the parser token for a given character. Useful for hacks

        // that want to inspect the mode state (say, for completion).

        getTokenAt: function(mode, state, ch) {

            var txt = this.text, stream = new StringStream(txt);

            while (stream.pos < ch && !stream.eol()) {

                stream.start = stream.pos;

                var style = mode.token(stream, state);

            }

            return {start: stream.start,

                end: stream.pos,

                string: stream.current(),

                className: style || null,

                state: state};

        },

        indentation: function(tabSize) {return countColumn(this.text, null, tabSize);},

        // Produces an HTML fragment for the line, taking selection,

        // marking, and highlighting into account.

        getHTML: function(sfrom, sto, includePre, tabText, endAt) {

            var html = [], first = true;

            if (includePre)

                html.push(this.className ? '<pre class="' + this.className + '">': "<pre>");

            function span(text, style) {

                if (!text) return;

                // Work around a bug where, in some compat modes, IE ignores leading spaces

                if (first && ie && text.charAt(0) == " ") text = "\u00a0" + text.slice(1);

                first = false;

                if (style) html.push('<span class="', style, '">', htmlEscape(text).replace(/\t/g, tabText), "</span>");

                else html.push(htmlEscape(text).replace(/\t/g, tabText));

            }

            var st = this.styles, allText = this.text, marked = this.marked;

            if (sfrom == sto) sfrom = null;

            var len = allText.length;

            if (endAt != null) len = Math.min(endAt, len);



            if (!allText && endAt == null)

                span(" ", sfrom != null && sto == null ? "CodeMirror-selected" : null);

            else if (!marked && sfrom == null)

                for (var i = 0, ch = 0; ch < len; i+=2) {

                    var str = st[i], style = st[i+1], l = str.length;

                    if (ch + l > len) str = str.slice(0, len - ch);

                    ch += l;

                    span(str, style && "cm-" + style);

                }

            else {

                var pos = 0, i = 0, text = "", style, sg = 0;

                var markpos = -1, mark = null;

                function nextMark() {

                    if (marked) {

                        markpos += 1;

                        mark = (markpos < marked.length) ? marked[markpos] : null;

                    }

                }

                nextMark();

                while (pos < len) {

                    var upto = len;

                    var extraStyle = "";

                    if (sfrom != null) {

                        if (sfrom > pos) upto = sfrom;

                        else if (sto == null || sto > pos) {

                            extraStyle = " CodeMirror-selected";

                            if (sto != null) upto = Math.min(upto, sto);

                        }

                    }

                    while (mark && mark.to != null && mark.to <= pos) nextMark();

                    if (mark) {

                        if (mark.from > pos) upto = Math.min(upto, mark.from);

                        else {

                            extraStyle += " " + mark.style;

                            if (mark.to != null) upto = Math.min(upto, mark.to);

                        }

                    }

                    for (;;) {

                        var end = pos + text.length;

                        var appliedStyle = style;

                        if (extraStyle) appliedStyle = style ? style + extraStyle : extraStyle;

                        span(end > upto ? text.slice(0, upto - pos) : text, appliedStyle);

                        if (end >= upto) {text = text.slice(upto - pos); pos = upto; break;}

                        pos = end;

                        text = st[i++]; style = "cm-" + st[i++];

                    }

                }

                if (sfrom != null && sto == null) span(" ", "CodeMirror-selected");

            }

            if (includePre) html.push("</pre>");

            return html.join("");

        },

        cleanUp: function() {

            this.parent = null;

            if (this.marked)

                for (var i = 0, e = this.marked.length; i < e; ++i) this.marked[i].detach(this);

        }

    };

    // Utility used by replace and split above

    function copyStyles(from, to, source, dest) {

        for (var i = 0, pos = 0, state = 0; pos < to; i+=2) {

            var part = source[i], end = pos + part.length;

            if (state == 0) {

                if (end > from) dest.push(part.slice(from - pos, Math.min(part.length, to - pos)), source[i+1]);

                if (end >= from) state = 1;

            }

            else if (state == 1) {

                if (end > to) dest.push(part.slice(0, to - pos), source[i+1]);

                else dest.push(part, source[i+1]);

            }

            pos = end;

        }

    }



    // Data structure that holds the sequence of lines.

    function LeafChunk(lines) {

        this.lines = lines;

        this.parent = null;

        for (var i = 0, e = lines.length, height = 0; i < e; ++i) {

            lines[i].parent = this;

            height += lines[i].height;

        }

        this.height = height;

    }

    LeafChunk.prototype = {

        chunkSize: function() { return this.lines.length; },

        remove: function(at, n, callbacks) {

            for (var i = at, e = at + n; i < e; ++i) {

                var line = this.lines[i];

                this.height -= line.height;

                line.cleanUp();

                if (line.handlers)

                    for (var j = 0; j < line.handlers.length; ++j) callbacks.push(line.handlers[j]);

            }

            this.lines.splice(at, n);

        },

        collapse: function(lines) {

            lines.splice.apply(lines, [lines.length, 0].concat(this.lines));

        },

        insertHeight: function(at, lines, height) {

            this.height += height;

            this.lines.splice.apply(this.lines, [at, 0].concat(lines));

            for (var i = 0, e = lines.length; i < e; ++i) lines[i].parent = this;

        },

        iterN: function(at, n, op) {

            for (var e = at + n; at < e; ++at)

                if (op(this.lines[at])) return true;

        }

    };

    function BranchChunk(children) {

        this.children = children;

        var size = 0, height = 0;

        for (var i = 0, e = children.length; i < e; ++i) {

            var ch = children[i];

            size += ch.chunkSize(); height += ch.height;

            ch.parent = this;

        }

        this.size = size;

        this.height = height;

        this.parent = null;

    }

    BranchChunk.prototype = {

        chunkSize: function() { return this.size; },

        remove: function(at, n, callbacks) {

            this.size -= n;

            for (var i = 0; i < this.children.length; ++i) {

                var child = this.children[i], sz = child.chunkSize();

                if (at < sz) {

                    var rm = Math.min(n, sz - at), oldHeight = child.height;

                    child.remove(at, rm, callbacks);

                    this.height -= oldHeight - child.height;

                    if (sz == rm) { this.children.splice(i--, 1); child.parent = null; }

                    if ((n -= rm) == 0) break;

                    at = 0;

                } else at -= sz;

            }

            if (this.size - n < 25) {

                var lines = [];

                this.collapse(lines);

                this.children = [new LeafChunk(lines)];

            }

        },

        collapse: function(lines) {

            for (var i = 0, e = this.children.length; i < e; ++i) this.children[i].collapse(lines);

        },

        insert: function(at, lines) {

            var height = 0;

            for (var i = 0, e = lines.length; i < e; ++i) height += lines[i].height;

            this.insertHeight(at, lines, height);

        },

        insertHeight: function(at, lines, height) {

            this.size += lines.length;

            this.height += height;

            for (var i = 0, e = this.children.length; i < e; ++i) {

                var child = this.children[i], sz = child.chunkSize();

                if (at <= sz) {

                    child.insertHeight(at, lines, height);

                    if (child.lines && child.lines.length > 50) {

                        while (child.lines.length > 50) {

                            var spilled = child.lines.splice(child.lines.length - 25, 25);

                            var newleaf = new LeafChunk(spilled);

                            child.height -= newleaf.height;

                            this.children.splice(i + 1, 0, newleaf);

                            newleaf.parent = this;

                        }

                        this.maybeSpill();

                    }

                    break;

                }

                at -= sz;

            }

        },

        maybeSpill: function() {

            if (this.children.length <= 10) return;

            var me = this;

            do {

                var spilled = me.children.splice(me.children.length - 5, 5);

                var sibling = new BranchChunk(spilled);

                if (!me.parent) { // Become the parent node

                    var copy = new BranchChunk(me.children);

                    copy.parent = me;

                    me.children = [copy, sibling];

                    me = copy;

                } else {

                    me.size -= sibling.size;

                    me.height -= sibling.height;

                    var myIndex = indexOf(me.parent.children, me);

                    me.parent.children.splice(myIndex + 1, 0, sibling);

                }

                sibling.parent = me.parent;

            } while (me.children.length > 10);

            me.parent.maybeSpill();

        },

        iter: function(from, to, op) { this.iterN(from, to - from, op); },

        iterN: function(at, n, op) {

            for (var i = 0, e = this.children.length; i < e; ++i) {

                var child = this.children[i], sz = child.chunkSize();

                if (at < sz) {

                    var used = Math.min(n, sz - at);

                    if (child.iterN(at, used, op)) return true;

                    if ((n -= used) == 0) break;

                    at = 0;

                } else at -= sz;

            }

        }

    };



    function getLineAt(chunk, n) {

        while (!chunk.lines) {

            for (var i = 0;; ++i) {

                var child = chunk.children[i], sz = child.chunkSize();

                if (n < sz) { chunk = child; break; }

                n -= sz;

            }

        }

        return chunk.lines[n];

    }

    function lineNo(line) {

        if (line.parent == null) return null;

        var cur = line.parent, no = indexOf(cur.lines, line);

        for (var chunk = cur.parent; chunk; cur = chunk, chunk = chunk.parent) {

            for (var i = 0, e = chunk.children.length; ; ++i) {

                if (chunk.children[i] == cur) break;

                no += chunk.children[i].chunkSize();

            }

        }

        return no;

    }

    function lineAtHeight(chunk, h) {

        var n = 0;

        outer: do {

            for (var i = 0, e = chunk.children.length; i < e; ++i) {

                var child = chunk.children[i], ch = child.height;

                if (h < ch) { chunk = child; continue outer; }

                h -= ch;

                n += child.chunkSize();

            }

            return n;

        } while (!chunk.lines);

        for (var i = 0, e = chunk.lines.length; i < e; ++i) {

            var line = chunk.lines[i], lh = line.height;

            if (h < lh) break;

            h -= lh;

        }

        return n + i;

    }

    function heightAtLine(chunk, n) {

        var h = 0;

        outer: do {

            for (var i = 0, e = chunk.children.length; i < e; ++i) {

                var child = chunk.children[i], sz = child.chunkSize();

                if (n < sz) { chunk = child; continue outer; }

                n -= sz;

                h += child.height;

            }

            return h;

        } while (!chunk.lines);

        for (var i = 0; i < n; ++i) h += chunk.lines[i].height;

        return h;

    }



    // The history object 'chunks' changes that are made close together

    // and at almost the same time into bigger undoable units.

    function History() {

        this.time = 0;

        this.done = []; this.undone = [];

    }

    History.prototype = {

        addChange: function(start, added, old) {

            this.undone.length = 0;

            var time = +new Date, last = this.done[this.done.length - 1];

            if (time - this.time > 400 || !last ||

                last.start > start + added || last.start + last.added < start - last.added + last.old.length)

                this.done.push({start: start, added: added, old: old});

            else {

                var oldoff = 0;

                if (start < last.start) {

                    for (var i = last.start - start - 1; i >= 0; --i)

                        last.old.unshift(old[i]);

                    last.added += last.start - start;

                    last.start = start;

                }

                else if (last.start < start) {

                    oldoff = start - last.start;

                    added += oldoff;

                }

                for (var i = last.added - oldoff, e = old.length; i < e; ++i)

                    last.old.push(old[i]);

                if (last.added < added) last.added = added;

            }

            this.time = time;

        }

    };



    function stopMethod() {e_stop(this);}

    // Ensure an event has a stop method.

    function addStop(event) {

        if (!event.stop) event.stop = stopMethod;

        return event;

    }



    function e_preventDefault(e) {

        if (e.preventDefault) e.preventDefault();

        else e.returnValue = false;

    }

    function e_stopPropagation(e) {

        if (e.stopPropagation) e.stopPropagation();

        else e.cancelBubble = true;

    }

    function e_stop(e) {e_preventDefault(e); e_stopPropagation(e);}

    CodeMirror.e_stop = e_stop;

    CodeMirror.e_preventDefault = e_preventDefault;

    CodeMirror.e_stopPropagation = e_stopPropagation;



    function e_target(e) {return e.target || e.srcElement;}

    function e_button(e) {

        if (e.which) return e.which;

        else if (e.button & 1) return 1;

        else if (e.button & 2) return 3;

        else if (e.button & 4) return 2;

    }



    // Event handler registration. If disconnect is true, it'll return a

    // function that unregisters the handler.

    function connect(node, type, handler, disconnect) {

        if (typeof node.addEventListener == "function") {

            node.addEventListener(type, handler, false);

            if (disconnect) return function() {node.removeEventListener(type, handler, false);};

        }

        else {

            var wrapHandler = function(event) {handler(event || window.event);};

            node.attachEvent("on" + type, wrapHandler);

            if (disconnect) return function() {node.detachEvent("on" + type, wrapHandler);};

        }

    }

    CodeMirror.connect = connect;



    function Delayed() {this.id = null;}

    Delayed.prototype = {set: function(ms, f) {clearTimeout(this.id); this.id = setTimeout(f, ms);}};



    // Detect drag-and-drop

    var dragAndDrop = function() {

        // IE8 has ondragstart and ondrop properties, but doesn't seem to

        // actually support ondragstart the way it's supposed to work.

        if (/MSIE [1-8]\b/.test(navigator.userAgent)) return false;

        var div = document.createElement('div');

        return "draggable" in div;

    }();



    var gecko = /gecko\/\d{7}/i.test(navigator.userAgent);

    var ie = /MSIE \d/.test(navigator.userAgent);

    var webkit = /WebKit\//.test(navigator.userAgent);



    var lineSep = "\n";

    // Feature-detect whether newlines in textareas are converted to \r\n

    (function () {

        var te = document.createElement("textarea");

        te.value = "foo\nbar";

        if (te.value.indexOf("\r") > -1) lineSep = "\r\n";

    }());



    // Counts the column offset in a string, taking tabs into account.

    // Used mostly to find indentation.

    function countColumn(string, end, tabSize) {

        if (end == null) {

            end = string.search(/[^\s\u00a0]/);

            if (end == -1) end = string.length;

        }

        for (var i = 0, n = 0; i < end; ++i) {

            if (string.charAt(i) == "\t") n += tabSize - (n % tabSize);

            else ++n;

        }

        return n;

    }



    function computedStyle(elt) {

        if (elt.currentStyle) return elt.currentStyle;

        return window.getComputedStyle(elt, null);

    }



    // Find the position of an element by following the offsetParent chain.

    // If screen==true, it returns screen (rather than page) coordinates.

    function eltOffset(node, screen) {

        var bod = node.ownerDocument.body;

        var x = 0, y = 0, skipBody = false;

        for (var n = node; n; n = n.offsetParent) {

            var ol = n.offsetLeft, ot = n.offsetTop;

            // Firefox reports weird inverted offsets when the body has a border.

            if (n == bod) { x += Math.abs(ol); y += Math.abs(ot); }

            else { x += ol, y += ot; }

            if (screen && computedStyle(n).position == "fixed")

                skipBody = true;

        }

        var e = screen && !skipBody ? null : bod;

        for (var n = node.parentNode; n != e; n = n.parentNode)

            if (n.scrollLeft != null) { x -= n.scrollLeft; y -= n.scrollTop;}

        return {left: x, top: y};

    }

    // Use the faster and saner getBoundingClientRect method when possible.

    if (document.documentElement.getBoundingClientRect != null) eltOffset = function(node, screen) {

        // Take the parts of bounding client rect that we are interested in so we are able to edit if need be,

        // since the returned value cannot be changed externally (they are kept in sync as the element moves within the page)

        try { var box = node.getBoundingClientRect(); box = { top: box.top, left: box.left }; }

        catch(e) { box = {top: 0, left: 0}; }

        if (!screen) {

            // Get the toplevel scroll, working around browser differences.

            if (window.pageYOffset == null) {

                var t = document.documentElement || document.body.parentNode;

                if (t.scrollTop == null) t = document.body;

                box.top += t.scrollTop; box.left += t.scrollLeft;

            } else {

                box.top += window.pageYOffset; box.left += window.pageXOffset;

            }

        }

        return box;

    };



    // Get a node's text content.

    function eltText(node) {

        return node.textContent || node.innerText || node.nodeValue || "";

    }



    // Operations on {line, ch} objects.

    function posEq(a, b) {return a.line == b.line && a.ch == b.ch;}

    function posLess(a, b) {return a.line < b.line || (a.line == b.line && a.ch < b.ch);}

    function copyPos(x) {return {line: x.line, ch: x.ch};}



    var escapeElement = document.createElement("pre");

    function htmlEscape(str) {

        escapeElement.textContent = str;

        return escapeElement.innerHTML;

    }

    // Recent (late 2011) Opera betas insert bogus newlines at the start

    // of the textContent, so we strip those.

    if (htmlEscape("a") == "\na")

        htmlEscape = function(str) {

            escapeElement.textContent = str;

            return escapeElement.innerHTML.slice(1);

        };

    // Some IEs don't preserve tabs through innerHTML

    else if (htmlEscape("\t") != "\t")

        htmlEscape = function(str) {

            escapeElement.innerHTML = "";

            escapeElement.appendChild(document.createTextNode(str));

            return escapeElement.innerHTML;

        };

    CodeMirror.htmlEscape = htmlEscape;



    // Used to position the cursor after an undo/redo by finding the

    // last edited character.

    function editEnd(from, to) {

        if (!to) return from ? from.length : 0;

        if (!from) return to.length;

        for (var i = from.length, j = to.length; i >= 0 && j >= 0; --i, --j)

            if (from.charAt(i) != to.charAt(j)) break;

        return j + 1;

    }



    function indexOf(collection, elt) {

        if (collection.indexOf) return collection.indexOf(elt);

        for (var i = 0, e = collection.length; i < e; ++i)

            if (collection[i] == elt) return i;

        return -1;

    }

    function isWordChar(ch) {

        return /\w/.test(ch) || ch.toUpperCase() != ch.toLowerCase();

    }



    // See if "".split is the broken IE version, if so, provide an

    // alternative way to split lines.

    var splitLines = "\n\nb".split(/\n/).length != 3 ? function(string) {

        var pos = 0, nl, result = [];

        while ((nl = string.indexOf("\n", pos)) > -1) {

            result.push(string.slice(pos, string.charAt(nl-1) == "\r" ? nl - 1 : nl));

            pos = nl + 1;

        }

        result.push(string.slice(pos));

        return result;

    } : function(string){return string.split(/\r?\n/);};

    CodeMirror.splitLines = splitLines;



    var hasSelection = window.getSelection ? function(te) {

        try { return te.selectionStart != te.selectionEnd; }

        catch(e) { return false; }

    } : function(te) {

        try {var range = te.ownerDocument.selection.createRange();}

        catch(e) {}

        if (!range || range.parentElement() != te) return false;

        return range.compareEndPoints("StartToEnd", range) != 0;

    };



    CodeMirror.defineMode("null", function() {

        return {token: function(stream) {stream.skipToEnd();}};

    });

    CodeMirror.defineMIME("text/plain", "null");



    var keyNames = {3: "Enter", 8: "Backspace", 9: "Tab", 13: "Enter", 16: "Shift", 17: "Ctrl", 18: "Alt",

        19: "Pause", 20: "CapsLock", 27: "Esc", 32: "Space", 33: "PageUp", 34: "PageDown", 35: "End",

        36: "Home", 37: "Left", 38: "Up", 39: "Right", 40: "Down", 44: "PrintScrn", 45: "Insert",

        46: "Delete", 59: ";", 91: "Mod", 92: "Mod", 93: "Mod", 186: ";", 187: "=", 188: ",",

        189: "-", 190: ".", 191: "/", 192: "`", 219: "[", 220: "\\", 221: "]", 222: "'", 63276: "PageUp",

        63277: "PageDown", 63275: "End", 63273: "Home", 63234: "Left", 63232: "Up", 63235: "Right",

        63233: "Down", 63302: "Insert", 63272: "Delete"};

    CodeMirror.keyNames = keyNames;

    (function() {

        // Number keys

        for (var i = 0; i < 10; i++) keyNames[i + 48] = String(i);

        // Alphabetic keys

        for (var i = 65; i <= 90; i++) keyNames[i] = String.fromCharCode(i);

        // Function keys

        for (var i = 1; i <= 12; i++) keyNames[i + 111] = keyNames[i + 63235] = "F" + i;

    })();



    return CodeMirror;

})();

CodeMirror.defineMode("xml", function(config, parserConfig) {

    var indentUnit = config.indentUnit;

    var Kludges = parserConfig.htmlMode ? {

        autoSelfClosers: {"br": true, "img": true, "hr": true, "link": true, "input": true,

            "meta": true, "col": true, "frame": true, "base": true, "area": true},

        doNotIndent: {"pre": true},

        allowUnquoted: true

    } : {autoSelfClosers: {}, doNotIndent: {}, allowUnquoted: false};

    var alignCDATA = parserConfig.alignCDATA;



    // Return variables for tokenizers

    var tagName, type;



    function inText(stream, state) {

        function chain(parser) {

            state.tokenize = parser;

            return parser(stream, state);

        }



        var ch = stream.next();

        if (ch == "<") {

            if (stream.eat("!")) {

                if (stream.eat("[")) {

                    if (stream.match("CDATA[")) return chain(inBlock("atom", "]]>"));

                    else return null;

                }

                else if (stream.match("--")) return chain(inBlock("comment", "-->"));

                else if (stream.match("DOCTYPE", true, true)) {

                    stream.eatWhile(/[\w\._\-]/);

                    return chain(doctype(1));

                }

                else return null;

            }

            else if (stream.eat("?")) {

                stream.eatWhile(/[\w\._\-]/);

                state.tokenize = inBlock("meta", "?>");

                return "meta";

            }

            else {

                type = stream.eat("/") ? "closeTag" : "openTag";

                stream.eatSpace();

                tagName = "";

                var c;

                while ((c = stream.eat(/[^\s\u00a0=<>\"\'\/?]/))) tagName += c;

                state.tokenize = inTag;

                return "tag";

            }

        }

        else if (ch == "&") {

            stream.eatWhile(/[^;]/);

            stream.eat(";");

            return "atom";

        }

        else {

            stream.eatWhile(/[^&<]/);

            return null;

        }

    }



    function inTag(stream, state) {

        var ch = stream.next();

        if (ch == ">" || (ch == "/" && stream.eat(">"))) {

            state.tokenize = inText;

            type = ch == ">" ? "endTag" : "selfcloseTag";

            return "tag";

        }

        else if (ch == "=") {

            type = "equals";

            return null;

        }

        else if (/[\'\"]/.test(ch)) {

            state.tokenize = inAttribute(ch);

            return state.tokenize(stream, state);

        }

        else {

            stream.eatWhile(/[^\s\u00a0=<>\"\'\/?]/);

            return "word";

        }

    }



    function inAttribute(quote) {

        return function(stream, state) {

            while (!stream.eol()) {

                if (stream.next() == quote) {

                    state.tokenize = inTag;

                    break;

                }

            }

            return "string";

        };

    }



    function inBlock(style, terminator) {

        return function(stream, state) {

            while (!stream.eol()) {

                if (stream.match(terminator)) {

                    state.tokenize = inText;

                    break;

                }

                stream.next();

            }

            return style;

        };

    }

    function doctype(depth) {

        return function(stream, state) {

            var ch;

            while ((ch = stream.next()) != null) {

                if (ch == "<") {

                    state.tokenize = doctype(depth + 1);

                    return state.tokenize(stream, state);

                } else if (ch == ">") {

                    if (depth == 1) {

                        state.tokenize = inText;

                        break;

                    } else {

                        state.tokenize = doctype(depth - 1);

                        return state.tokenize(stream, state);

                    }

                }

            }

            return "meta";

        };

    }



    var curState, setStyle;

    function pass() {

        for (var i = arguments.length - 1; i >= 0; i--) curState.cc.push(arguments[i]);

    }

    function cont() {

        pass.apply(null, arguments);

        return true;

    }



    function pushContext(tagName, startOfLine) {

        var noIndent = Kludges.doNotIndent.hasOwnProperty(tagName) || (curState.context && curState.context.noIndent);

        curState.context = {

            prev: curState.context,

            tagName: tagName,

            indent: curState.indented,

            startOfLine: startOfLine,

            noIndent: noIndent

        };

    }

    function popContext() {

        if (curState.context) curState.context = curState.context.prev;

    }



    function element(type) {

        if (type == "openTag") {

            curState.tagName = tagName;

            return cont(attributes, endtag(curState.startOfLine));

        } else if (type == "closeTag") {

            var err = false;

            if (curState.context) {

                err = curState.context.tagName != tagName;

            } else {

                err = true;

            }

            if (err) setStyle = "error";

            return cont(endclosetag(err));

        }

        return cont();

    }

    function endtag(startOfLine) {

        return function(type) {

            if (type == "selfcloseTag" ||

                (type == "endTag" && Kludges.autoSelfClosers.hasOwnProperty(curState.tagName.toLowerCase())))

                return cont();

            if (type == "endTag") {pushContext(curState.tagName, startOfLine); return cont();}

            return cont();

        };

    }

    function endclosetag(err) {

        return function(type) {

            if (err) setStyle = "error";

            if (type == "endTag") { popContext(); return cont(); }

            setStyle = "error";

            return cont(arguments.callee);

        }

    }



    function attributes(type) {

        if (type == "word") {setStyle = "attribute"; return cont(attributes);}

        if (type == "equals") return cont(attvalue, attributes);

        if (type == "string") {setStyle = "error"; return cont(attributes);}

        return pass();

    }

    function attvalue(type) {

        if (type == "word" && Kludges.allowUnquoted) {setStyle = "string"; return cont();}

        if (type == "string") return cont(attvaluemaybe);

        return pass();

    }

    function attvaluemaybe(type) {

        if (type == "string") return cont(attvaluemaybe);

        else return pass();

    }



    return {

        startState: function() {

            return {tokenize: inText, cc: [], indented: 0, startOfLine: true, tagName: null, context: null};

        },



        token: function(stream, state) {

            if (stream.sol()) {

                state.startOfLine = true;

                state.indented = stream.indentation();

            }

            if (stream.eatSpace()) return null;



            setStyle = type = tagName = null;

            var style = state.tokenize(stream, state);

            state.type = type;

            if ((style || type) && style != "comment") {

                curState = state;

                while (true) {

                    var comb = state.cc.pop() || element;

                    if (comb(type || style)) break;

                }

            }

            state.startOfLine = false;

            return setStyle || style;

        },



        indent: function(state, textAfter, fullLine) {

            var context = state.context;

            if ((state.tokenize != inTag && state.tokenize != inText) ||

                context && context.noIndent)

                return fullLine ? fullLine.match(/^(\s*)/)[0].length : 0;

            if (alignCDATA && /<!\[CDATA\[/.test(textAfter)) return 0;

            if (context && /^<\//.test(textAfter))

                context = context.prev;

            while (context && !context.startOfLine)

                context = context.prev;

            if (context) return context.indent + indentUnit;

            else return 0;

        },



        compareStates: function(a, b) {

            if (a.indented != b.indented || a.tokenize != b.tokenize) return false;

            for (var ca = a.context, cb = b.context; ; ca = ca.prev, cb = cb.prev) {

                if (!ca || !cb) return ca == cb;

                if (ca.tagName != cb.tagName) return false;

            }

        },



        electricChars: "/"

    };

});



CodeMirror.defineMIME("application/xml", "xml");

CodeMirror.defineMIME("text/html", {name: "xml", htmlMode: true});

CodeMirror.defineMode("javascript", function(config, parserConfig) {

    var indentUnit = config.indentUnit;

    var jsonMode = parserConfig.json;



    // Tokenizer



    var keywords = function(){

        function kw(type) {return {type: type, style: "keyword"};}

        var A = kw("keyword a"), B = kw("keyword b"), C = kw("keyword c");

        var operator = kw("operator"), atom = {type: "atom", style: "atom"};

        return {

            "if": A, "while": A, "with": A, "else": B, "do": B, "try": B, "finally": B,

            "return": C, "break": C, "continue": C, "new": C, "delete": C, "throw": C,

            "var": kw("var"), "const": kw("var"), "let": kw("var"),

            "function": kw("function"), "catch": kw("catch"),

            "for": kw("for"), "switch": kw("switch"), "case": kw("case"), "default": kw("default"),

            "in": operator, "typeof": operator, "instanceof": operator,

            "true": atom, "false": atom, "null": atom, "undefined": atom, "NaN": atom, "Infinity": atom

        };

    }();



    var isOperatorChar = /[+\-*&%=<>!?|]/;



    function chain(stream, state, f) {

        state.tokenize = f;

        return f(stream, state);

    }



    function nextUntilUnescaped(stream, end) {

        var escaped = false, next;

        while ((next = stream.next()) != null) {

            if (next == end && !escaped)

                return false;

            escaped = !escaped && next == "\\";

        }

        return escaped;

    }



    // Used as scratch variables to communicate multiple values without

    // consing up tons of objects.

    var type, content;

    function ret(tp, style, cont) {

        type = tp; content = cont;

        return style;

    }



    function jsTokenBase(stream, state) {

        var ch = stream.next();

        if (ch == '"' || ch == "'")

            return chain(stream, state, jsTokenString(ch));

        else if (/[\[\]{}\(\),;\:\.]/.test(ch))

            return ret(ch);

        else if (ch == "0" && stream.eat(/x/i)) {

            stream.eatWhile(/[\da-f]/i);

            return ret("number", "number");

        }

        else if (/\d/.test(ch)) {

            stream.match(/^\d*(?:\.\d*)?(?:[eE][+\-]?\d+)?/);

            return ret("number", "number");

        }

        else if (ch == "/") {

            if (stream.eat("*")) {

                return chain(stream, state, jsTokenComment);

            }

            else if (stream.eat("/")) {

                stream.skipToEnd();

                return ret("comment", "comment");

            }

            else if (state.reAllowed) {

                nextUntilUnescaped(stream, "/");

                stream.eatWhile(/[gimy]/); // 'y' is "sticky" option in Mozilla

                return ret("regexp", "string");

            }

            else {

                stream.eatWhile(isOperatorChar);

                return ret("operator", null, stream.current());

            }

        }

        else if (ch == "#") {

            stream.skipToEnd();

            return ret("error", "error");

        }

        else if (isOperatorChar.test(ch)) {

            stream.eatWhile(isOperatorChar);

            return ret("operator", null, stream.current());

        }

        else {

            stream.eatWhile(/[\w\$_]/);

            var word = stream.current(), known = keywords.propertyIsEnumerable(word) && keywords[word];

            return (known && state.kwAllowed) ? ret(known.type, known.style, word) :

                ret("variable", "variable", word);

        }

    }



    function jsTokenString(quote) {

        return function(stream, state) {

            if (!nextUntilUnescaped(stream, quote))

                state.tokenize = jsTokenBase;

            return ret("string", "string");

        };

    }



    function jsTokenComment(stream, state) {

        var maybeEnd = false, ch;

        while (ch = stream.next()) {

            if (ch == "/" && maybeEnd) {

                state.tokenize = jsTokenBase;

                break;

            }

            maybeEnd = (ch == "*");

        }

        return ret("comment", "comment");

    }



    // Parser



    var atomicTypes = {"atom": true, "number": true, "variable": true, "string": true, "regexp": true};



    function JSLexical(indented, column, type, align, prev, info) {

        this.indented = indented;

        this.column = column;

        this.type = type;

        this.prev = prev;

        this.info = info;

        if (align != null) this.align = align;

    }



    function inScope(state, varname) {

        for (var v = state.localVars; v; v = v.next)

            if (v.name == varname) return true;

    }



    function parseJS(state, style, type, content, stream) {

        var cc = state.cc;

        // Communicate our context to the combinators.

        // (Less wasteful than consing up a hundred closures on every call.)

        cx.state = state; cx.stream = stream; cx.marked = null, cx.cc = cc;



        if (!state.lexical.hasOwnProperty("align"))

            state.lexical.align = true;



        while(true) {

            var combinator = cc.length ? cc.pop() : jsonMode ? expression : statement;

            if (combinator(type, content)) {

                while(cc.length && cc[cc.length - 1].lex)

                    cc.pop()();

                if (cx.marked) return cx.marked;

                if (type == "variable" && inScope(state, content)) return "variable-2";

                return style;

            }

        }

    }



    // Combinator utils



    var cx = {state: null, column: null, marked: null, cc: null};

    function pass() {

        for (var i = arguments.length - 1; i >= 0; i--) cx.cc.push(arguments[i]);

    }

    function cont() {

        pass.apply(null, arguments);

        return true;

    }

    function register(varname) {

        var state = cx.state;

        if (state.context) {

            cx.marked = "def";

            for (var v = state.localVars; v; v = v.next)

                if (v.name == varname) return;

            state.localVars = {name: varname, next: state.localVars};

        }

    }



    // Combinators



    var defaultVars = {name: "this", next: {name: "arguments"}};

    function pushcontext() {

        if (!cx.state.context) cx.state.localVars = defaultVars;

        cx.state.context = {prev: cx.state.context, vars: cx.state.localVars};

    }

    function popcontext() {

        cx.state.localVars = cx.state.context.vars;

        cx.state.context = cx.state.context.prev;

    }

    function pushlex(type, info) {

        var result = function() {

            var state = cx.state;

            state.lexical = new JSLexical(state.indented, cx.stream.column(), type, null, state.lexical, info)

        };

        result.lex = true;

        return result;

    }

    function poplex() {

        var state = cx.state;

        if (state.lexical.prev) {

            if (state.lexical.type == ")")

                state.indented = state.lexical.indented;

            state.lexical = state.lexical.prev;

        }

    }

    poplex.lex = true;



    function expect(wanted) {

        return function expecting(type) {

            if (type == wanted) return cont();

            else if (wanted == ";") return pass();

            else return cont(arguments.callee);

        };

    }



    function statement(type) {

        if (type == "var") return cont(pushlex("vardef"), vardef1, expect(";"), poplex);

        if (type == "keyword a") return cont(pushlex("form"), expression, statement, poplex);

        if (type == "keyword b") return cont(pushlex("form"), statement, poplex);

        if (type == "{") return cont(pushlex("}"), block, poplex);

        if (type == ";") return cont();

        if (type == "function") return cont(functiondef);

        if (type == "for") return cont(pushlex("form"), expect("("), pushlex(")"), forspec1, expect(")"),

            poplex, statement, poplex);

        if (type == "variable") return cont(pushlex("stat"), maybelabel);

        if (type == "switch") return cont(pushlex("form"), expression, pushlex("}", "switch"), expect("{"),

            block, poplex, poplex);

        if (type == "case") return cont(expression, expect(":"));

        if (type == "default") return cont(expect(":"));

        if (type == "catch") return cont(pushlex("form"), pushcontext, expect("("), funarg, expect(")"),

            statement, poplex, popcontext);

        return pass(pushlex("stat"), expression, expect(";"), poplex);

    }

    function expression(type) {

        if (atomicTypes.hasOwnProperty(type)) return cont(maybeoperator);

        if (type == "function") return cont(functiondef);

        if (type == "keyword c") return cont(maybeexpression);

        if (type == "(") return cont(pushlex(")"), expression, expect(")"), poplex, maybeoperator);

        if (type == "operator") return cont(expression);

        if (type == "[") return cont(pushlex("]"), commasep(expression, "]"), poplex, maybeoperator);

        if (type == "{") return cont(pushlex("}"), commasep(objprop, "}"), poplex, maybeoperator);

        return cont();

    }

    function maybeexpression(type) {

        if (type.match(/[;\}\)\],]/)) return pass();

        return pass(expression);

    }



    function maybeoperator(type, value) {

        if (type == "operator" && /\+\+|--/.test(value)) return cont(maybeoperator);

        if (type == "operator") return cont(expression);

        if (type == ";") return;

        if (type == "(") return cont(pushlex(")"), commasep(expression, ")"), poplex, maybeoperator);

        if (type == ".") return cont(property, maybeoperator);

        if (type == "[") return cont(pushlex("]"), expression, expect("]"), poplex, maybeoperator);

    }

    function maybelabel(type) {

        if (type == ":") return cont(poplex, statement);

        return pass(maybeoperator, expect(";"), poplex);

    }

    function property(type) {

        if (type == "variable") {cx.marked = "property"; return cont();}

    }

    function objprop(type) {

        if (type == "variable") cx.marked = "property";

        if (atomicTypes.hasOwnProperty(type)) return cont(expect(":"), expression);

    }

    function commasep(what, end) {

        function proceed(type) {

            if (type == ",") return cont(what, proceed);

            if (type == end) return cont();

            return cont(expect(end));

        }

        return function commaSeparated(type) {

            if (type == end) return cont();

            else return pass(what, proceed);

        };

    }

    function block(type) {

        if (type == "}") return cont();

        return pass(statement, block);

    }

    function vardef1(type, value) {

        if (type == "variable"){register(value); return cont(vardef2);}

        return cont();

    }

    function vardef2(type, value) {

        if (value == "=") return cont(expression, vardef2);

        if (type == ",") return cont(vardef1);

    }

    function forspec1(type) {

        if (type == "var") return cont(vardef1, forspec2);

        if (type == ";") return pass(forspec2);

        if (type == "variable") return cont(formaybein);

        return pass(forspec2);

    }

    function formaybein(type, value) {

        if (value == "in") return cont(expression);

        return cont(maybeoperator, forspec2);

    }

    function forspec2(type, value) {

        if (type == ";") return cont(forspec3);

        if (value == "in") return cont(expression);

        return cont(expression, expect(";"), forspec3);

    }

    function forspec3(type) {

        if (type != ")") cont(expression);

    }

    function functiondef(type, value) {

        if (type == "variable") {register(value); return cont(functiondef);}

        if (type == "(") return cont(pushlex(")"), pushcontext, commasep(funarg, ")"), poplex, statement, popcontext);

    }

    function funarg(type, value) {

        if (type == "variable") {register(value); return cont();}

    }



    // Interface



    return {

        startState: function(basecolumn) {

            return {

                tokenize: jsTokenBase,

                reAllowed: true,

                kwAllowed: true,

                cc: [],

                lexical: new JSLexical((basecolumn || 0) - indentUnit, 0, "block", false),

                localVars: null,

                context: null,

                indented: 0

            };

        },



        token: function(stream, state) {

            if (stream.sol()) {

                if (!state.lexical.hasOwnProperty("align"))

                    state.lexical.align = false;

                state.indented = stream.indentation();

            }

            if (stream.eatSpace()) return null;

            var style = state.tokenize(stream, state);

            if (type == "comment") return style;

            state.reAllowed = type == "operator" || type == "keyword c" || type.match(/^[\[{}\(,;:]$/);

            state.kwAllowed = type != '.';

            return parseJS(state, style, type, content, stream);

        },



        indent: function(state, textAfter) {

            if (state.tokenize != jsTokenBase) return 0;

            var firstChar = textAfter && textAfter.charAt(0), lexical = state.lexical,

                type = lexical.type, closing = firstChar == type;

            if (type == "vardef") return lexical.indented + 4;

            else if (type == "form" && firstChar == "{") return lexical.indented;

            else if (type == "stat" || type == "form") return lexical.indented + indentUnit;

            else if (lexical.info == "switch" && !closing)

                return lexical.indented + (/^(?:case|default)\b/.test(textAfter) ? indentUnit : 2 * indentUnit);

            else if (lexical.align) return lexical.column + (closing ? 0 : 1);

            else return lexical.indented + (closing ? 0 : indentUnit);

        },



        electricChars: ":{}"

    };

});



CodeMirror.defineMIME("text/javascript", "javascript");

CodeMirror.defineMIME("application/json", {name: "javascript", json: true});



CodeMirror.defineMode("css", function(config) {

    var indentUnit = config.indentUnit, type;

    function ret(style, tp) {type = tp; return style;}



    function tokenBase(stream, state) {

        var ch = stream.next();

        if (ch == "@") {stream.eatWhile(/[\w\\\-]/); return ret("meta", stream.current());}

        else if (ch == "/" && stream.eat("*")) {

            state.tokenize = tokenCComment;

            return tokenCComment(stream, state);

        }

        else if (ch == "<" && stream.eat("!")) {

            state.tokenize = tokenSGMLComment;

            return tokenSGMLComment(stream, state);

        }

        else if (ch == "=") ret(null, "compare");

        else if ((ch == "~" || ch == "|") && stream.eat("=")) return ret(null, "compare");

        else if (ch == "\"" || ch == "'") {

            state.tokenize = tokenString(ch);

            return state.tokenize(stream, state);

        }

        else if (ch == "#") {

            stream.eatWhile(/[\w\\\-]/);

            return ret("atom", "hash");

        }

        else if (ch == "!") {

            stream.match(/^\s*\w*/);

            return ret("keyword", "important");

        }

        else if (/\d/.test(ch)) {

            stream.eatWhile(/[\w.%]/);

            return ret("number", "unit");

        }

        else if (/[,.+>*\/]/.test(ch)) {

            return ret(null, "select-op");

        }

        else if (/[;{}:\[\]]/.test(ch)) {

            return ret(null, ch);

        }

        else {

            stream.eatWhile(/[\w\\\-]/);

            return ret("variable", "variable");

        }

    }



    function tokenCComment(stream, state) {

        var maybeEnd = false, ch;

        while ((ch = stream.next()) != null) {

            if (maybeEnd && ch == "/") {

                state.tokenize = tokenBase;

                break;

            }

            maybeEnd = (ch == "*");

        }

        return ret("comment", "comment");

    }



    function tokenSGMLComment(stream, state) {

        var dashes = 0, ch;

        while ((ch = stream.next()) != null) {

            if (dashes >= 2 && ch == ">") {

                state.tokenize = tokenBase;

                break;

            }

            dashes = (ch == "-") ? dashes + 1 : 0;

        }

        return ret("comment", "comment");

    }



    function tokenString(quote) {

        return function(stream, state) {

            var escaped = false, ch;

            while ((ch = stream.next()) != null) {

                if (ch == quote && !escaped)

                    break;

                escaped = !escaped && ch == "\\";

            }

            if (!escaped) state.tokenize = tokenBase;

            return ret("string", "string");

        };

    }



    return {

        startState: function(base) {

            return {tokenize: tokenBase,

                baseIndent: base || 0,

                stack: []};

        },



        token: function(stream, state) {

            if (stream.eatSpace()) return null;

            var style = state.tokenize(stream, state);



            var context = state.stack[state.stack.length-1];

            if (type == "hash" && context == "rule") style = "atom";

            else if (style == "variable") {

                if (context == "rule") style = "number";

                else if (!context || context == "@media{") style = "tag";

            }



            if (context == "rule" && /^[\{\};]$/.test(type))

                state.stack.pop();

            if (type == "{") {

                if (context == "@media") state.stack[state.stack.length-1] = "@media{";

                else state.stack.push("{");

            }

            else if (type == "}") state.stack.pop();

            else if (type == "@media") state.stack.push("@media");

            else if (context == "{" && type != "comment") state.stack.push("rule");

            return style;

        },



        indent: function(state, textAfter) {

            var n = state.stack.length;

            if (/^\}/.test(textAfter))

                n -= state.stack[state.stack.length-1] == "rule" ? 2 : 1;

            return state.baseIndent + n * indentUnit;

        },



        electricChars: "}"

    };

});



CodeMirror.defineMIME("text/css", "css");

CodeMirror.defineMode("htmlmixed", function(config, parserConfig) {

    var htmlMode = CodeMirror.getMode(config, {name: "xml", htmlMode: true});

    var jsMode = CodeMirror.getMode(config, "javascript");

    var cssMode = CodeMirror.getMode(config, "css");



    function html(stream, state) {

        var style = htmlMode.token(stream, state.htmlState);

        if (style == "tag" && stream.current() == ">" && state.htmlState.context) {

            if (/^script$/i.test(state.htmlState.context.tagName)) {

                state.token = javascript;

                state.localState = jsMode.startState(htmlMode.indent(state.htmlState, ""));

                state.mode = "javascript";

            }

            else if (/^style$/i.test(state.htmlState.context.tagName)) {

                state.token = css;

                state.localState = cssMode.startState(htmlMode.indent(state.htmlState, ""));

                state.mode = "css";

            }

        }

        return style;

    }

    function maybeBackup(stream, pat, style) {

        var cur = stream.current();

        var close = cur.search(pat);

        if (close > -1) stream.backUp(cur.length - close);

        return style;

    }

    function javascript(stream, state) {

        if (stream.match(/^<\/\s*script\s*>/i, false)) {

            state.token = html;

            state.curState = null;

            state.mode = "html";

            return html(stream, state);

        }

        return maybeBackup(stream, /<\/\s*script\s*>/,

            jsMode.token(stream, state.localState));

    }

    function css(stream, state) {

        if (stream.match(/^<\/\s*style\s*>/i, false)) {

            state.token = html;

            state.localState = null;

            state.mode = "html";

            return html(stream, state);

        }

        return maybeBackup(stream, /<\/\s*style\s*>/,

            cssMode.token(stream, state.localState));

    }



    return {

        startState: function() {

            var state = htmlMode.startState();

            return {token: html, localState: null, mode: "html", htmlState: state};

        },



        copyState: function(state) {

            if (state.localState)

                var local = CodeMirror.copyState(state.token == css ? cssMode : jsMode, state.localState);

            return {token: state.token, localState: local, mode: state.mode,

                htmlState: CodeMirror.copyState(htmlMode, state.htmlState)};

        },



        token: function(stream, state) {

            return state.token(stream, state);

        },



        indent: function(state, textAfter) {

            if (state.token == html || /^\s*<\//.test(textAfter))

                return htmlMode.indent(state.htmlState, textAfter);

            else if (state.token == javascript)

                return jsMode.indent(state.localState, textAfter);

            else

                return cssMode.indent(state.localState, textAfter);

        },



        compareStates: function(a, b) {

            return htmlMode.compareStates(a.htmlState, b.htmlState);

        },



        electricChars: "/{}:"

    }

});



CodeMirror.defineMIME("text/html", "htmlmixed");

