/**
 * Copyright (c) 2006-2012, JGraph Ltd
 */
/**
 * Constructs a new graph editor
 */
EditorUi = function (editor, container, lightbox) {
    mxEventSource.call(this);

    this.destroyFunctions = [];
    this.editor = editor || new Editor();
    this.container = container || document.body;

    var graph = this.editor.graph;
    graph.lightbox = lightbox;

    // Faster scrollwheel zoom is possible with CSS transforms
    if (graph.useCssTransforms) {
        this.lazyZoomDelay = 0;
    }

    // Pre-fetches submenu image or replaces with embedded image if supported
    if (mxClient.IS_SVG) {
        mxPopupMenu.prototype.submenuImage = 'data:image/gif;base64,R0lGODlhCQAJAIAAAP///zMzMyH5BAEAAAAALAAAAAAJAAkAAAIPhI8WebHsHopSOVgb26AAADs=';
    } else {
        new Image().src = mxPopupMenu.prototype.submenuImage;
    }

    // Pre-fetches connect image
    if (!mxClient.IS_SVG && mxConnectionHandler.prototype.connectImage != null) {
        new Image().src = mxConnectionHandler.prototype.connectImage.src;
    }

    // Disables graph and forced panning in chromeless mode
    if (this.editor.chromeless && !this.editor.editable) {
        this.footerHeight = 0;
        graph.isEnabled = function () {
            return false;
        };
        graph.panningHandler.isForcePanningEvent = function (me) {
            return !mxEvent.isPopupTrigger(me.getEvent());
        };
    }

    // Creates the user interface
    this.actions = new Actions(this);
    this.menus = this.createMenus();

    if (!graph.standalone) {
        this.createDivs();
        this.createUi();
        this.refresh();

        // Disables HTML and text selection
        var textEditing = mxUtils.bind(this, function (evt) {
            if (evt == null) {
                evt = window.event;
            }

            return graph.isEditing() || (evt != null && this.isSelectionAllowed(evt));
        });

        // Disables text selection while not editing and no dialog visible
        if (this.container == document.body) {
            this.menubarContainer.onselectstart = textEditing;
            this.menubarContainer.onmousedown = textEditing;
            this.toolbarContainer.onselectstart = textEditing;
            this.toolbarContainer.onmousedown = textEditing;
            this.diagramContainer.onselectstart = textEditing;
            this.diagramContainer.onmousedown = textEditing;
            this.sidebarContainer.onselectstart = textEditing;
            this.sidebarContainer.onmousedown = textEditing;
            this.formatContainer.onselectstart = textEditing;
            this.formatContainer.onmousedown = textEditing;
            this.footerContainer.onselectstart = textEditing;
            this.footerContainer.onmousedown = textEditing;

            if (this.tabContainer != null) {
                // Mouse down is needed for drag and drop
                this.tabContainer.onselectstart = textEditing;
            }
        }

        // And uses built-in context menu while editing
        if (!this.editor.chromeless || this.editor.editable) {
            // Allows context menu for links in hints
            var linkHandler = function (evt) {
                if (evt != null) {
                    var source = mxEvent.getSource(evt);

                    if (source.nodeName == 'A') {
                        while (source != null) {
                            if (source.className == 'geHint') {
                                return true;
                            }

                            source = source.parentNode;
                        }
                    }
                }

                return textEditing(evt);
            };

            if (mxClient.IS_IE && (typeof (document.documentMode) === 'undefined' || document.documentMode < 9)) {
                mxEvent.addListener(this.diagramContainer, 'contextmenu', linkHandler);
            } else {
                // Allows browser context menu outside of diagram and sidebar
                this.diagramContainer.oncontextmenu = linkHandler;
            }
        } else {
            graph.panningHandler.usePopupTrigger = false;
        }

        // Contains the main graph instance inside the given panel
        graph.init(this.diagramContainer);

        // Improves line wrapping for in-place editor
        if (mxClient.IS_SVG && graph.view.getDrawPane() != null) {
            var root = graph.view.getDrawPane().ownerSVGElement;

            if (root != null) {
                root.style.position = 'absolute';
            }
        }

        // Creates hover icons
        this.hoverIcons = this.createHoverIcons();

        // Adds tooltip when mouse is over scrollbars to show space-drag panning option
        mxEvent.addListener(this.diagramContainer, 'mousemove', mxUtils.bind(this, function (evt) {
            var off = mxUtils.getOffset(this.diagramContainer);

            if (mxEvent.getClientX(evt) - off.x - this.diagramContainer.clientWidth > 0 ||
                mxEvent.getClientY(evt) - off.y - this.diagramContainer.clientHeight > 0) {
                this.diagramContainer.setAttribute('title', mxResources.get('panTooltip'));
            } else {
                this.diagramContainer.removeAttribute('title');
            }
        }));

        // Escape key hides dialogs, adds space+drag panning
        var spaceKeyPressed = false;

        // Overrides hovericons to disable while space key is pressed
        var hoverIconsIsResetEvent = this.hoverIcons.isResetEvent;

        this.hoverIcons.isResetEvent = function (evt, allowShift) {
            return spaceKeyPressed || hoverIconsIsResetEvent.apply(this, arguments);
        };

        this.keydownHandler = mxUtils.bind(this, function (evt) {
            if (evt.which == 32 /* Space */ && !graph.isEditing()) {
                spaceKeyPressed = true;
                this.hoverIcons.reset();
                graph.container.style.cursor = 'move';

                // Disables scroll after space keystroke with scrollbars
                if (!graph.isEditing() && mxEvent.getSource(evt) == graph.container) {
                    mxEvent.consume(evt);
                }
            } else if (!mxEvent.isConsumed(evt) && evt.keyCode == 27 /* Escape */) {
                this.hideDialog(null, true);
            }
        });

        mxEvent.addListener(document, 'keydown', this.keydownHandler);

        this.keyupHandler = mxUtils.bind(this, function (evt) {
            graph.container.style.cursor = '';
            spaceKeyPressed = false;
        });

        mxEvent.addListener(document, 'keyup', this.keyupHandler);

        // Forces panning for middle and right mouse buttons
        var panningHandlerIsForcePanningEvent = graph.panningHandler.isForcePanningEvent;
        graph.panningHandler.isForcePanningEvent = function (me) {
            // Ctrl+left button is reported as right button in FF on Mac
            return panningHandlerIsForcePanningEvent.apply(this, arguments) ||
                spaceKeyPressed || (mxEvent.isMouseEvent(me.getEvent()) &&
                    (this.usePopupTrigger || !mxEvent.isPopupTrigger(me.getEvent())) &&
                    ((!mxEvent.isControlDown(me.getEvent()) &&
                        mxEvent.isRightMouseButton(me.getEvent())) ||
                        mxEvent.isMiddleMouseButton(me.getEvent())));
        };

        // Ctrl/Cmd+Enter applies editing value except in Safari where Ctrl+Enter creates
        // a new line (while Enter creates a new paragraph and Shift+Enter stops)
        var cellEditorIsStopEditingEvent = graph.cellEditor.isStopEditingEvent;
        graph.cellEditor.isStopEditingEvent = function (evt) {
            return cellEditorIsStopEditingEvent.apply(this, arguments) ||
                (evt.keyCode == 13 && ((!mxClient.IS_SF && mxEvent.isControlDown(evt)) ||
                    (mxClient.IS_MAC && mxEvent.isMetaDown(evt)) ||
                    (mxClient.IS_SF && mxEvent.isShiftDown(evt))));
        };

        // Switches toolbar for text editing
        var textMode = false;
        var fontMenu = null;
        var sizeMenu = null;
        var nodes = null;

        var updateToolbar = mxUtils.bind(this, function () {
            if (this.toolbar != null && textMode != graph.cellEditor.isContentEditing()) {
                var node = this.toolbar.container.firstChild;
                var newNodes = [];

                while (node != null) {
                    var tmp = node.nextSibling;

                    if (mxUtils.indexOf(this.toolbar.staticElements, node) < 0) {
                        node.parentNode.removeChild(node);
                        newNodes.push(node);
                    }

                    node = tmp;
                }

                // Saves references to special items
                var tmp1 = this.toolbar.fontMenu;
                var tmp2 = this.toolbar.sizeMenu;

                if (nodes == null) {
                    this.toolbar.createTextToolbar();
                } else {
                    for (var i = 0; i < nodes.length; i++) {
                        this.toolbar.container.appendChild(nodes[i]);
                    }

                    // Restores references to special items
                    this.toolbar.fontMenu = fontMenu;
                    this.toolbar.sizeMenu = sizeMenu;
                }

                textMode = graph.cellEditor.isContentEditing();
                fontMenu = tmp1;
                sizeMenu = tmp2;
                nodes = newNodes;
            }
        });

        var ui = this;

        // Overrides cell editor to update toolbar
        var cellEditorStartEditing = graph.cellEditor.startEditing;
        graph.cellEditor.startEditing = function () {
            cellEditorStartEditing.apply(this, arguments);
            updateToolbar();

            if (graph.cellEditor.isContentEditing()) {
                var updating = false;

                var updateCssHandler = function () {
                    if (!updating) {
                        updating = true;

                        window.setTimeout(function () {
                            var selectedElement = graph.getSelectedElement();
                            var node = selectedElement;

                            while (node != null && node.nodeType != mxConstants.NODETYPE_ELEMENT) {
                                node = node.parentNode;
                            }

                            if (node != null) {
                                var css = mxUtils.getCurrentStyle(node);

                                if (css != null && ui.toolbar != null) {
                                    // Strips leading and trailing quotes
                                    var ff = css.fontFamily;

                                    if (ff.charAt(0) == '\'') {
                                        ff = ff.substring(1);
                                    }

                                    if (ff.charAt(ff.length - 1) == '\'') {
                                        ff = ff.substring(0, ff.length - 1);
                                    }

                                    ui.toolbar.setFontName(ff);
                                    ui.toolbar.setFontSize(parseInt(css.fontSize));
                                }
                            }

                            updating = false;
                        }, 0);
                    }
                };

                mxEvent.addListener(graph.cellEditor.textarea, 'input', updateCssHandler)
                mxEvent.addListener(graph.cellEditor.textarea, 'touchend', updateCssHandler);
                mxEvent.addListener(graph.cellEditor.textarea, 'mouseup', updateCssHandler);
                mxEvent.addListener(graph.cellEditor.textarea, 'keyup', updateCssHandler);
                updateCssHandler();
            }
        };

        var cellEditorStopEditing = graph.cellEditor.stopEditing;
        graph.cellEditor.stopEditing = function (cell, trigger) {
            cellEditorStopEditing.apply(this, arguments);
            updateToolbar();
        };

        // Enables scrollbars and sets cursor style for the container
        graph.container.setAttribute('tabindex', '0');
        graph.container.style.cursor = 'default';

        // Workaround for page scroll if embedded via iframe
        if (window.self === window.top && graph.container.parentNode != null) {
            try {
                graph.container.focus();
            } catch (e) {
                // ignores error in old versions of IE
            }
        }

        // Keeps graph container focused on mouse down
        var graphFireMouseEvent = graph.fireMouseEvent;
        graph.fireMouseEvent = function (evtName, me, sender) {
            if (evtName == mxEvent.MOUSE_DOWN) {
                this.container.focus();
            }

            graphFireMouseEvent.apply(this, arguments);
        };

        // Configures automatic expand on mouseover
        graph.popupMenuHandler.autoExpand = true;

        // Installs context menu
        if (this.menus != null) {
            graph.popupMenuHandler.factoryMethod = mxUtils.bind(this, function (menu, cell, evt) {
                this.menus.createPopupMenu(menu, cell, evt);
            });
        }

        // Hides context menu
        mxEvent.addGestureListeners(document, mxUtils.bind(this, function (evt) {
            graph.popupMenuHandler.hideMenu();
        }));

        // Create handler for key events
        this.keyHandler = this.createKeyHandler(editor);

        // Getter for key handler
        this.getKeyHandler = function () {
            return keyHandler;
        };

        // Stores the current style and assigns it to new cells
        var styles = ['rounded', 'shadow', 'glass', 'dashed', 'dashPattern', 'comic', 'labelBackgroundColor'];
        var connectStyles = ['shape', 'edgeStyle', 'curved', 'rounded', 'elbow', 'comic', 'jumpStyle', 'jumpSize'];

        // Note: Everything that is not in styles is ignored (styles is augmented below)
        this.setDefaultStyle = function (cell) {
            try {
                var state = graph.view.getState(cell);

                if (state != null) {
                    // Ignores default styles
                    var clone = cell.clone();
                    clone.style = ''
                    var defaultStyle = graph.getCellStyle(clone);
                    var values = [];
                    var keys = [];

                    for (var key in state.style) {
                        if (defaultStyle[key] != state.style[key]) {
                            values.push(state.style[key]);
                            keys.push(key);
                        }
                    }

                    // Handles special case for value "none"
                    var cellStyle = graph.getModel().getStyle(state.cell);
                    var tokens = (cellStyle != null) ? cellStyle.split(';') : [];

                    for (var i = 0; i < tokens.length; i++) {
                        var tmp = tokens[i];
                        var pos = tmp.indexOf('=');

                        if (pos >= 0) {
                            var key = tmp.substring(0, pos);
                            var value = tmp.substring(pos + 1);

                            if (defaultStyle[key] != null && value == 'none') {
                                values.push(value);
                                keys.push(key);
                            }
                        }
                    }

                    // Resets current style
                    if (graph.getModel().isEdge(state.cell)) {
                        graph.currentEdgeStyle = {};
                    } else {
                        graph.currentVertexStyle = {}
                    }

                    this.fireEvent(new mxEventObject('styleChanged', 'keys', keys, 'values', values, 'cells', [state.cell]));
                }
            } catch (e) {
                this.handleError(e);
            }
        };

        this.clearDefaultStyle = function () {
            graph.currentEdgeStyle = mxUtils.clone(graph.defaultEdgeStyle);
            graph.currentVertexStyle = mxUtils.clone(graph.defaultVertexStyle);

            // Updates UI
            this.fireEvent(new mxEventObject('styleChanged', 'keys', [], 'values', [], 'cells', []));
        };

        // Keys that should be ignored if the cell has a value (known: new default for all cells is html=1 so
        // for the html key this effecticely only works for edges inserted via the connection handler)
        var valueStyles = ['fontFamily', 'fontSize', 'fontColor'];

        // Keys that always update the current edge style regardless of selection
        var alwaysEdgeStyles = ['edgeStyle', 'startArrow', 'startFill', 'startSize', 'endArrow',
            'endFill', 'endSize'];

        // Keys that are ignored together (if one appears all are ignored)
        var keyGroups = [['startArrow', 'startFill', 'startSize', 'sourcePerimeterSpacing',
            'endArrow', 'endFill', 'endSize', 'targetPerimeterSpacing'],
            ['strokeColor', 'strokeWidth'],
            ['fillColor', 'gradientColor'],
            valueStyles,
            ['opacity'],
            ['align'],
            ['html']];

        // Adds all keys used above to the styles array
        for (var i = 0; i < keyGroups.length; i++) {
            for (var j = 0; j < keyGroups[i].length; j++) {
                styles.push(keyGroups[i][j]);
            }
        }

        for (var i = 0; i < connectStyles.length; i++) {
            if (mxUtils.indexOf(styles, connectStyles[i]) < 0) {
                styles.push(connectStyles[i]);
            }
        }

        // Implements a global current style for edges and vertices that is applied to new cells
        var insertHandler = function (cells, asText) {
            var model = graph.getModel();

            model.beginUpdate();
            try {
                // Applies only basic text styles
                if (asText) {
                    var edge = model.isEdge(cell);
                    var current = (edge) ? graph.currentEdgeStyle : graph.currentVertexStyle;
                    var textStyles = ['fontSize', 'fontFamily', 'fontColor'];

                    for (var j = 0; j < textStyles.length; j++) {
                        var value = current[textStyles[j]];

                        if (value != null) {
                            graph.setCellStyles(textStyles[j], value, cells);
                        }
                    }
                } else {
                    for (var i = 0; i < cells.length; i++) {
                        var cell = cells[i];

                        // Removes styles defined in the cell style from the styles to be applied
                        var cellStyle = model.getStyle(cell);
                        var tokens = (cellStyle != null) ? cellStyle.split(';') : [];
                        var appliedStyles = styles.slice();

                        for (var j = 0; j < tokens.length; j++) {
                            var tmp = tokens[j];
                            var pos = tmp.indexOf('=');

                            if (pos >= 0) {
                                var key = tmp.substring(0, pos);
                                var index = mxUtils.indexOf(appliedStyles, key);

                                if (index >= 0) {
                                    appliedStyles.splice(index, 1);
                                }

                                // Handles special cases where one defined style ignores other styles
                                for (var k = 0; k < keyGroups.length; k++) {
                                    var group = keyGroups[k];

                                    if (mxUtils.indexOf(group, key) >= 0) {
                                        for (var l = 0; l < group.length; l++) {
                                            var index2 = mxUtils.indexOf(appliedStyles, group[l]);

                                            if (index2 >= 0) {
                                                appliedStyles.splice(index2, 1);
                                            }
                                        }
                                    }
                                }
                            }
                        }

                        // Applies the current style to the cell
                        var edge = model.isEdge(cell);
                        var current = (edge) ? graph.currentEdgeStyle : graph.currentVertexStyle;
                        var newStyle = model.getStyle(cell);

                        for (var j = 0; j < appliedStyles.length; j++) {
                            var key = appliedStyles[j];
                            var styleValue = current[key];

                            if (styleValue != null && (key != 'shape' || edge)) {
                                // Special case: Connect styles are not applied here but in the connection handler
                                if (!edge || mxUtils.indexOf(connectStyles, key) < 0) {
                                    newStyle = mxUtils.setStyle(newStyle, key, styleValue);
                                }
                            }
                        }

                        model.setStyle(cell, newStyle);
                    }
                }
            } finally {
                model.endUpdate();
            }
        };

        graph.addListener('cellsInserted', function (sender, evt) {
            insertHandler(evt.getProperty('cells'));
        });

        graph.addListener('textInserted', function (sender, evt) {
            insertHandler(evt.getProperty('cells'), true);
        });

        graph.connectionHandler.addListener(mxEvent.CONNECT, function (sender, evt) {
            var cells = [evt.getProperty('cell')];

            if (evt.getProperty('terminalInserted')) {
                cells.push(evt.getProperty('terminal'));
            }

            insertHandler(cells);
        });

        this.addListener('styleChanged', mxUtils.bind(this, function (sender, evt) {
            // Checks if edges and/or vertices were modified
            var cells = evt.getProperty('cells');
            var vertex = false;
            var edge = false;

            if (cells.length > 0) {
                for (var i = 0; i < cells.length; i++) {
                    vertex = graph.getModel().isVertex(cells[i]) || vertex;
                    edge = graph.getModel().isEdge(cells[i]) || edge;

                    if (edge && vertex) {
                        break;
                    }
                }
            } else {
                vertex = true;
                edge = true;
            }

            var keys = evt.getProperty('keys');
            var values = evt.getProperty('values');

            for (var i = 0; i < keys.length; i++) {
                var common = mxUtils.indexOf(valueStyles, keys[i]) >= 0;

                // Ignores transparent stroke colors
                if (keys[i] != 'strokeColor' || (values[i] != null && values[i] != 'none')) {
                    // Special case: Edge style and shape
                    if (mxUtils.indexOf(connectStyles, keys[i]) >= 0) {
                        if (edge || mxUtils.indexOf(alwaysEdgeStyles, keys[i]) >= 0) {
                            if (values[i] == null) {
                                delete graph.currentEdgeStyle[keys[i]];
                            } else {
                                graph.currentEdgeStyle[keys[i]] = values[i];
                            }
                        }
                        // Uses style for vertex if defined in styles
                        else if (vertex && mxUtils.indexOf(styles, keys[i]) >= 0) {
                            if (values[i] == null) {
                                delete graph.currentVertexStyle[keys[i]];
                            } else {
                                graph.currentVertexStyle[keys[i]] = values[i];
                            }
                        }
                    } else if (mxUtils.indexOf(styles, keys[i]) >= 0) {
                        if (vertex || common) {
                            if (values[i] == null) {
                                delete graph.currentVertexStyle[keys[i]];
                            } else {
                                graph.currentVertexStyle[keys[i]] = values[i];
                            }
                        }

                        if (edge || common || mxUtils.indexOf(alwaysEdgeStyles, keys[i]) >= 0) {
                            if (values[i] == null) {
                                delete graph.currentEdgeStyle[keys[i]];
                            } else {
                                graph.currentEdgeStyle[keys[i]] = values[i];
                            }
                        }
                    }
                }
            }

            if (this.toolbar != null) {
                this.toolbar.setFontName(graph.currentVertexStyle['fontFamily'] || Menus.prototype.defaultFont);
                this.toolbar.setFontSize(graph.currentVertexStyle['fontSize'] || Menus.prototype.defaultFontSize);

                if (this.toolbar.edgeStyleMenu != null) {
                    // Updates toolbar icon for edge style
                    var edgeStyleDiv = this.toolbar.edgeStyleMenu.getElementsByTagName('div')[0];

                    if (graph.currentEdgeStyle['edgeStyle'] == 'orthogonalEdgeStyle' && graph.currentEdgeStyle['curved'] == '1') {
                        edgeStyleDiv.className = 'geSprite geSprite-curved';
                    } else if (graph.currentEdgeStyle['edgeStyle'] == 'straight' || graph.currentEdgeStyle['edgeStyle'] == 'none' ||
                        graph.currentEdgeStyle['edgeStyle'] == null) {
                        edgeStyleDiv.className = 'geSprite geSprite-straight';
                    } else if (graph.currentEdgeStyle['edgeStyle'] == 'entityRelationEdgeStyle') {
                        edgeStyleDiv.className = 'geSprite geSprite-entity';
                    } else if (graph.currentEdgeStyle['edgeStyle'] == 'elbowEdgeStyle') {
                        edgeStyleDiv.className = 'geSprite geSprite-' + ((graph.currentEdgeStyle['elbow'] == 'vertical') ?
                            'verticalelbow' : 'horizontalelbow');
                    } else if (graph.currentEdgeStyle['edgeStyle'] == 'isometricEdgeStyle') {
                        edgeStyleDiv.className = 'geSprite geSprite-' + ((graph.currentEdgeStyle['elbow'] == 'vertical') ?
                            'verticalisometric' : 'horizontalisometric');
                    } else {
                        edgeStyleDiv.className = 'geSprite geSprite-orthogonal';
                    }
                }

                if (this.toolbar.edgeShapeMenu != null) {
                    // Updates icon for edge shape
                    var edgeShapeDiv = this.toolbar.edgeShapeMenu.getElementsByTagName('div')[0];

                    if (graph.currentEdgeStyle['shape'] == 'link') {
                        edgeShapeDiv.className = 'geSprite geSprite-linkedge';
                    } else if (graph.currentEdgeStyle['shape'] == 'flexArrow') {
                        edgeShapeDiv.className = 'geSprite geSprite-arrow';
                    } else if (graph.currentEdgeStyle['shape'] == 'arrow') {
                        edgeShapeDiv.className = 'geSprite geSprite-simplearrow';
                    } else {
                        edgeShapeDiv.className = 'geSprite geSprite-connection';
                    }
                }

                // Updates icon for optinal line start shape
                if (this.toolbar.lineStartMenu != null) {
                    var lineStartDiv = this.toolbar.lineStartMenu.getElementsByTagName('div')[0];

                    lineStartDiv.className = this.getCssClassForMarker('start',
                        graph.currentEdgeStyle['shape'], graph.currentEdgeStyle[mxConstants.STYLE_STARTARROW],
                        mxUtils.getValue(graph.currentEdgeStyle, 'startFill', '1'));
                }

                // Updates icon for optinal line end shape
                if (this.toolbar.lineEndMenu != null) {
                    var lineEndDiv = this.toolbar.lineEndMenu.getElementsByTagName('div')[0];

                    lineEndDiv.className = this.getCssClassForMarker('end',
                        graph.currentEdgeStyle['shape'], graph.currentEdgeStyle[mxConstants.STYLE_ENDARROW],
                        mxUtils.getValue(graph.currentEdgeStyle, 'endFill', '1'));
                }
            }
        }));

        // Update font size and font family labels
        if (this.toolbar != null) {
            var update = mxUtils.bind(this, function () {
                var ff = graph.currentVertexStyle['fontFamily'] || 'Helvetica';
                var fs = String(graph.currentVertexStyle['fontSize'] || '12');
                var state = graph.getView().getState(graph.getSelectionCell());

                if (state != null) {
                    ff = state.style[mxConstants.STYLE_FONTFAMILY] || ff;
                    fs = state.style[mxConstants.STYLE_FONTSIZE] || fs;

                    if (ff.length > 10) {
                        ff = ff.substring(0, 8) + '...';
                    }
                }

                this.toolbar.setFontName(ff);
                this.toolbar.setFontSize(fs);
            });

            graph.getSelectionModel().addListener(mxEvent.CHANGE, update);
            graph.getModel().addListener(mxEvent.CHANGE, update);
        }

        // Makes sure the current layer is visible when cells are added
        graph.addListener(mxEvent.CELLS_ADDED, function (sender, evt) {
            var cells = evt.getProperty('cells');
            var parent = evt.getProperty('parent');

            if (graph.getModel().isLayer(parent) && !graph.isCellVisible(parent) && cells != null && cells.length > 0) {
                graph.getModel().setVisible(parent, true);
            }
        });

        // Global handler to hide the current menu
        this.gestureHandler = mxUtils.bind(this, function (evt) {
            if (this.currentMenu != null && mxEvent.getSource(evt) != this.currentMenu.div) {
                this.hideCurrentMenu();
            }
        });

        mxEvent.addGestureListeners(document, this.gestureHandler);

        // Updates the editor UI after the window has been resized or the orientation changes
        // Timeout is workaround for old IE versions which have a delay for DOM client sizes.
        // Should not use delay > 0 to avoid handle multiple repaints during window resize
        this.resizeHandler = mxUtils.bind(this, function () {
            window.setTimeout(mxUtils.bind(this, function () {
                if (this.editor.graph != null) {
                    this.refresh();
                }
            }), 0);
        });

        mxEvent.addListener(window, 'resize', this.resizeHandler);

        this.orientationChangeHandler = mxUtils.bind(this, function () {
            this.refresh();
        });

        mxEvent.addListener(window, 'orientationchange', this.orientationChangeHandler);

        // Workaround for bug on iOS see
        // http://stackoverflow.com/questions/19012135/ios-7-ipad-safari-landscape-innerheight-outerheight-layout-issue
        if (mxClient.IS_IOS && !window.navigator.standalone) {
            this.scrollHandler = mxUtils.bind(this, function () {
                window.scrollTo(0, 0);
            });

            mxEvent.addListener(window, 'scroll', this.scrollHandler);
        }

        /**
         * Sets the initial scrollbar locations after a file was loaded.
         */
        this.editor.addListener('resetGraphView', mxUtils.bind(this, function () {
            this.resetScrollbars();
        }));

        /**
         * Repaints the grid.
         */
        this.addListener('gridEnabledChanged', mxUtils.bind(this, function () {
            graph.view.validateBackground();
        }));

        this.addListener('backgroundColorChanged', mxUtils.bind(this, function () {
            graph.view.validateBackground();
        }));

        /**
         * Repaints the grid.
         */
        graph.addListener('gridSizeChanged', mxUtils.bind(this, function () {
            if (graph.isGridEnabled()) {
                graph.view.validateBackground();
            }
        }));

        // Resets UI, updates action and menu states
        this.editor.resetGraph();
    }

    this.init();

    if (!graph.standalone) {
        this.open();
    }
};

// Extends mxEventSource
mxUtils.extend(EditorUi, mxEventSource);

/**
 * Global config that specifies if the compact UI elements should be used.
 */
EditorUi.compactUi = true;

/**
 * Specifies the size of the split bar.
 */
EditorUi.prototype.splitSize = (mxClient.IS_TOUCH || mxClient.IS_POINTER) ? 12 : 8;

/**
 * Specifies the height of the menubar. Default is 0.
 */
EditorUi.prototype.menubarHeight = 0;

/**
 * Specifies the width of the format panel should be enabled. Default is true.
 */
EditorUi.prototype.formatEnabled = true;

/**
 * Specifies the width of the format panel. Default is 400.
 */
EditorUi.prototype.formatWidth = 400;

/**
 * Specifies the height of the toolbar. Default is 38.
 */
EditorUi.prototype.toolbarHeight = 38;

/**
 * Specifies the height of the footer. Default is 28.
 */
EditorUi.prototype.footerHeight = 28;

/**
 * Specifies the height of the optional sidebarFooterContainer. Default is 34.
 */
EditorUi.prototype.sidebarFooterHeight = 34;

/**
 * Specifies the position of the horizontal split bar. Default is 240 or 118 for
 * screen widths <= 640px.
 */
EditorUi.prototype.hsplitPosition = (screen.width <= 640) ? 118 : ((urlParams['sidebar-entries'] != 'large') ? 212 : 240);

/**
 * Specifies if animations are allowed in <executeLayout>. Default is true.
 */
EditorUi.prototype.allowAnimation = true;

/**
 * Default is 2.
 */
EditorUi.prototype.lightboxMaxFitScale = 2;

/**
 * Default is 4.
 */
EditorUi.prototype.lightboxVerticalDivider = 4;

/**
 * Specifies if single click on horizontal split should collapse sidebar. Default is false.
 */
EditorUi.prototype.hsplitClickEnabled = false;

/**
 * Installs the listeners to update the action states.
 */
EditorUi.prototype.init = function () {
    var graph = this.editor.graph;
    if (!graph.standalone) {
        mxEvent.addListener(graph.container, 'keydown', mxUtils.bind(this, function (evt) {
            this.onKeyDown(evt);
        }));

        mxEvent.addListener(graph.container, 'keypress', mxUtils.bind(this, function (evt) {
            this.onKeyPress(evt);
        }));

        // Updates action states
        this.addUndoListener();
        this.addBeforeUnloadListener();

        graph.getSelectionModel().addListener(mxEvent.CHANGE, mxUtils.bind(this, function () {
            this.updateActionStates();
        }));

        graph.getModel().addListener(mxEvent.CHANGE, mxUtils.bind(this, function () {
            this.updateActionStates();
        }));

        // Changes action states after change of default parent
        var graphSetDefaultParent = graph.setDefaultParent;
        var ui = this;

        this.editor.graph.setDefaultParent = function () {
            graphSetDefaultParent.apply(this, arguments);
            ui.updateActionStates();
        };

        // Hack to make editLink available in vertex handler
        graph.editLink = ui.actions.get('editLink').funct;

        this.updateActionStates();
        this.initClipboard();
        this.initCanvas();

        if (this.format != null) {
            this.format.init();
        }
    }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.onKeyDown = function (evt) {
    var graph = this.editor.graph;

    // Tab selects next cell
    if (evt.which == 9 && graph.isEnabled() && !mxEvent.isAltDown(evt)) {
        if (graph.isEditing()) {
            graph.stopEditing(false);
        } else {
            graph.selectCell(!mxEvent.isShiftDown(evt));
        }

        mxEvent.consume(evt);
    }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.onKeyPress = function (evt) {
    var graph = this.editor.graph;

    // KNOWN: Focus does not work if label is empty in quirks mode
    if (this.isImmediateEditingEvent(evt) && !graph.isEditing() && !graph.isSelectionEmpty() && evt.which !== 0 &&
        evt.which !== 27 && !mxEvent.isAltDown(evt) && !mxEvent.isControlDown(evt) && !mxEvent.isMetaDown(evt)) {
        graph.escape();
        graph.startEditing();

        // Workaround for FF where char is lost if cursor is placed before char
        if (mxClient.IS_FF) {
            var ce = graph.cellEditor;
            ce.textarea.innerHTML = String.fromCharCode(evt.which);

            // Moves cursor to end of textarea
            var range = document.createRange();
            range.selectNodeContents(ce.textarea);
            range.collapse(false);
            var sel = window.getSelection();
            sel.removeAllRanges();
            sel.addRange(range);
        }
    }
};

/**
 * Returns true if the given event should start editing. This implementation returns true.
 */
EditorUi.prototype.isImmediateEditingEvent = function (evt) {
    return true;
};

/**
 * Private helper method.
 */
EditorUi.prototype.getCssClassForMarker = function (prefix, shape, marker, fill) {
    var result = '';

    if (shape == 'flexArrow') {
        result = (marker != null && marker != mxConstants.NONE) ?
            'geSprite geSprite-' + prefix + 'blocktrans' : 'geSprite geSprite-noarrow';
    } else {
        if (marker == mxConstants.ARROW_CLASSIC) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'classic' : 'geSprite geSprite-' + prefix + 'classictrans';
        } else if (marker == mxConstants.ARROW_CLASSIC_THIN) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'classicthin' : 'geSprite geSprite-' + prefix + 'classicthintrans';
        } else if (marker == mxConstants.ARROW_OPEN) {
            result = 'geSprite geSprite-' + prefix + 'open';
        } else if (marker == mxConstants.ARROW_OPEN_THIN) {
            result = 'geSprite geSprite-' + prefix + 'openthin';
        } else if (marker == mxConstants.ARROW_BLOCK) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'block' : 'geSprite geSprite-' + prefix + 'blocktrans';
        } else if (marker == mxConstants.ARROW_BLOCK_THIN) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'blockthin' : 'geSprite geSprite-' + prefix + 'blockthintrans';
        } else if (marker == mxConstants.ARROW_OVAL) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'oval' : 'geSprite geSprite-' + prefix + 'ovaltrans';
        } else if (marker == mxConstants.ARROW_DIAMOND) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'diamond' : 'geSprite geSprite-' + prefix + 'diamondtrans';
        } else if (marker == mxConstants.ARROW_DIAMOND_THIN) {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'thindiamond' : 'geSprite geSprite-' + prefix + 'thindiamondtrans';
        } else if (marker == 'openAsync') {
            result = 'geSprite geSprite-' + prefix + 'openasync';
        } else if (marker == 'dash') {
            result = 'geSprite geSprite-' + prefix + 'dash';
        } else if (marker == 'cross') {
            result = 'geSprite geSprite-' + prefix + 'cross';
        } else if (marker == 'async') {
            result = (fill == '1') ? 'geSprite geSprite-' + prefix + 'async' : 'geSprite geSprite-' + prefix + 'asynctrans';
        } else if (marker == 'circle' || marker == 'circlePlus') {
            result = (fill == '1' || marker == 'circle') ? 'geSprite geSprite-' + prefix + 'circle' : 'geSprite geSprite-' + prefix + 'circleplus';
        } else if (marker == 'ERone') {
            result = 'geSprite geSprite-' + prefix + 'erone';
        } else if (marker == 'ERmandOne') {
            result = 'geSprite geSprite-' + prefix + 'eronetoone';
        } else if (marker == 'ERmany') {
            result = 'geSprite geSprite-' + prefix + 'ermany';
        } else if (marker == 'ERoneToMany') {
            result = 'geSprite geSprite-' + prefix + 'eronetomany';
        } else if (marker == 'ERzeroToOne') {
            result = 'geSprite geSprite-' + prefix + 'eroneopt';
        } else if (marker == 'ERzeroToMany') {
            result = 'geSprite geSprite-' + prefix + 'ermanyopt';
        } else {
            result = 'geSprite geSprite-noarrow';
        }
    }

    return result;
};

/**
 * Overridden in Menus.js
 */
EditorUi.prototype.createMenus = function () {
    return null;
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.updatePasteActionStates = function () {
    var graph = this.editor.graph;
    var paste = this.actions.get('paste');
    var pasteHere = this.actions.get('pasteHere');

    paste.setEnabled(this.editor.graph.cellEditor.isContentEditing() || (!mxClipboard.isEmpty() &&
        graph.isEnabled() && !graph.isCellLocked(graph.getDefaultParent())));
    pasteHere.setEnabled(paste.isEnabled());
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.initClipboard = function () {
    var ui = this;

    var mxClipboardCut = mxClipboard.cut;
    mxClipboard.cut = function (graph) {
        if (graph.cellEditor.isContentEditing()) {
            document.execCommand('cut', false, null);
        } else {
            mxClipboardCut.apply(this, arguments);
        }

        ui.updatePasteActionStates();
    };

    var mxClipboardCopy = mxClipboard.copy;
    mxClipboard.copy = function (graph) {
        var result = null;

        if (graph.cellEditor.isContentEditing()) {
            document.execCommand('copy', false, null);
        } else {
            result = result || graph.getSelectionCells();
            result = graph.getExportableCells(graph.model.getTopmostCells(result));

            var cloneMap = new Object();
            var lookup = graph.createCellLookup(result);
            var clones = graph.cloneCells(result, null, cloneMap);

            // Uses temporary model to force new IDs to be assigned
            // to avoid having to carry over the mapping from object
            // ID to cell ID to the paste operation
            var model = new mxGraphModel();
            var parent = model.getChildAt(model.getRoot(), 0);

            for (var i = 0; i < clones.length; i++) {
                model.add(parent, clones[i]);
            }

            graph.updateCustomLinks(graph.createCellMapping(cloneMap, lookup), clones);

            mxClipboard.insertCount = 1;
            mxClipboard.setCells(clones);
        }

        ui.updatePasteActionStates();

        return result;
    };

    var mxClipboardPaste = mxClipboard.paste;
    mxClipboard.paste = function (graph) {
        var result = null;

        if (graph.cellEditor.isContentEditing()) {
            document.execCommand('paste', false, null);
        } else {
            result = mxClipboardPaste.apply(this, arguments);
        }

        ui.updatePasteActionStates();

        return result;
    };

    // Overrides cell editor to update paste action state
    var cellEditorStartEditing = this.editor.graph.cellEditor.startEditing;

    this.editor.graph.cellEditor.startEditing = function () {
        cellEditorStartEditing.apply(this, arguments);
        ui.updatePasteActionStates();
    };

    var cellEditorStopEditing = this.editor.graph.cellEditor.stopEditing;

    this.editor.graph.cellEditor.stopEditing = function (cell, trigger) {
        cellEditorStopEditing.apply(this, arguments);
        ui.updatePasteActionStates();
    };

    this.updatePasteActionStates();
};

/**
 * Initializes the infinite canvas.
 */
EditorUi.prototype.lazyZoomDelay = 20;

/**
 * Initializes the infinite canvas.
 */
EditorUi.prototype.initCanvas = function () {
    // Initial page layout view, scrollBuffer and timer-based scrolling
    var graph = this.editor.graph;
    graph.timerAutoScroll = true;

    /**
     * Returns the padding for pages in page view with scrollbars.
     */
    graph.getPagePadding = function () {
        return new mxPoint(Math.max(0, Math.round((graph.container.offsetWidth - 34) / graph.view.scale)),
            Math.max(0, Math.round((graph.container.offsetHeight - 34) / graph.view.scale)));
    };

    // Fits the number of background pages to the graph
    graph.view.getBackgroundPageBounds = function () {
        var layout = this.graph.getPageLayout();
        var page = this.graph.getPageSize();

        return new mxRectangle(this.scale * (this.translate.x + layout.x * page.width),
            this.scale * (this.translate.y + layout.y * page.height),
            this.scale * layout.width * page.width,
            this.scale * layout.height * page.height);
    };

    graph.getPreferredPageSize = function (bounds, width, height) {
        var pages = this.getPageLayout();
        var size = this.getPageSize();

        return new mxRectangle(0, 0, pages.width * size.width, pages.height * size.height);
    };

    // Scales pages/graph to fit available size
    var resize = null;
    var ui = this;

    if (this.editor.isChromelessView()) {
        resize = mxUtils.bind(this, function (autoscale, maxScale, cx, cy) {
            if (graph.container != null && !graph.isViewer()) {
                cx = (cx != null) ? cx : 0;
                cy = (cy != null) ? cy : 0;

                var bds = (graph.pageVisible) ? graph.view.getBackgroundPageBounds() : graph.getGraphBounds();
                var scroll = mxUtils.hasScrollbars(graph.container);
                var tr = graph.view.translate;
                var s = graph.view.scale;

                // Normalizes the bounds
                var b = mxRectangle.fromRectangle(bds);
                b.x = b.x / s - tr.x;
                b.y = b.y / s - tr.y;
                b.width /= s;
                b.height /= s;

                var st = graph.container.scrollTop;
                var sl = graph.container.scrollLeft;
                var sb = (mxClient.IS_QUIRKS || document.documentMode >= 8) ? 20 : 14;

                if (document.documentMode == 8 || document.documentMode == 9) {
                    sb += 3;
                }

                var cw = graph.container.offsetWidth - sb;
                var ch = graph.container.offsetHeight - sb;

                var ns = (autoscale) ? Math.max(0.3, Math.min(maxScale || 1, cw / b.width)) : s;
                var dx = ((cw - ns * b.width) / 2) / ns;
                var dy = (this.lightboxVerticalDivider == 0) ? 0 : ((ch - ns * b.height) / this.lightboxVerticalDivider) / ns;

                if (scroll) {
                    dx = Math.max(dx, 0);
                    dy = Math.max(dy, 0);
                }

                if (scroll || bds.width < cw || bds.height < ch) {
                    graph.view.scaleAndTranslate(ns, Math.floor(dx - b.x), Math.floor(dy - b.y));
                    graph.container.scrollTop = st * ns / s;
                    graph.container.scrollLeft = sl * ns / s;
                } else if (cx != 0 || cy != 0) {
                    var t = graph.view.translate;
                    graph.view.setTranslate(Math.floor(t.x + cx / s), Math.floor(t.y + cy / s));
                }
            }
        });

        // Hack to make function available to subclassers
        this.chromelessResize = resize;

        // Hook for subclassers for override
        this.chromelessWindowResize = mxUtils.bind(this, function () {
            this.chromelessResize(false);
        });

        // Removable resize listener
        var autoscaleResize = mxUtils.bind(this, function () {
            this.chromelessWindowResize(false);
        });

        mxEvent.addListener(window, 'resize', autoscaleResize);

        this.destroyFunctions.push(function () {
            mxEvent.removeListener(window, 'resize', autoscaleResize);
        });

        this.editor.addListener('resetGraphView', mxUtils.bind(this, function () {
            this.chromelessResize(true);
        }));

        this.actions.get('zoomIn').funct = mxUtils.bind(this, function (evt) {
            graph.zoomIn();
            this.chromelessResize(false);
        });
        this.actions.get('zoomOut').funct = mxUtils.bind(this, function (evt) {
            graph.zoomOut();
            this.chromelessResize(false);
        });

        // Creates toolbar for viewer - do not use CSS here
        // as this may be used in a viewer that has no CSS
        if (urlParams['toolbar'] != '0') {
            var toolbarConfig = JSON.parse(decodeURIComponent(urlParams['toolbar-config'] || '{}'));

            this.chromelessToolbar = document.createElement('div');
            this.chromelessToolbar.style.position = 'fixed';
            this.chromelessToolbar.style.overflow = 'hidden';
            this.chromelessToolbar.style.boxSizing = 'border-box';
            this.chromelessToolbar.style.whiteSpace = 'nowrap';
            this.chromelessToolbar.style.backgroundColor = '#000000';
            this.chromelessToolbar.style.padding = '10px 10px 8px 10px';
            this.chromelessToolbar.style.left = (graph.isViewer()) ? '0' : '50%';

            if (!mxClient.IS_VML) {
                mxUtils.setPrefixedStyle(this.chromelessToolbar.style, 'borderRadius', '20px');
                mxUtils.setPrefixedStyle(this.chromelessToolbar.style, 'transition', 'opacity 600ms ease-in-out');
            }

            var updateChromelessToolbarPosition = mxUtils.bind(this, function () {
                var css = mxUtils.getCurrentStyle(graph.container);

                if (graph.isViewer()) {
                    this.chromelessToolbar.style.top = '0';
                } else {
                    this.chromelessToolbar.style.bottom = ((css != null) ? parseInt(css['margin-bottom'] || 0) : 0) +
                        ((this.tabContainer != null) ? (20 + parseInt(this.tabContainer.style.height)) : 20) + 'px';
                }
            });

            this.editor.addListener('resetGraphView', updateChromelessToolbarPosition);
            updateChromelessToolbarPosition();

            var btnCount = 0;

            var addButton = mxUtils.bind(this, function (fn, imgSrc, tip) {
                btnCount++;

                var a = document.createElement('span');
                a.style.paddingLeft = '8px';
                a.style.paddingRight = '8px';
                a.style.cursor = 'pointer';
                mxEvent.addListener(a, 'click', fn);

                if (tip != null) {
                    a.setAttribute('title', tip);
                }

                var img = document.createElement('img');
                img.setAttribute('border', '0');
                img.setAttribute('src', imgSrc);

                a.appendChild(img);
                this.chromelessToolbar.appendChild(a);

                return a;
            });

            if (toolbarConfig.backBtn != null) {
                addButton(mxUtils.bind(this, function (evt) {
                    window.location.href = toolbarConfig.backBtn.url;
                    mxEvent.consume(evt);
                }), Editor.backLargeImage, mxResources.get('back', null, 'Back'));
            }

            var prevButton = addButton(mxUtils.bind(this, function (evt) {
                this.actions.get('previousPage').funct();
                mxEvent.consume(evt);
            }), Editor.previousLargeImage, mxResources.get('previousPage'));

            var pageInfo = document.createElement('div');
            pageInfo.style.display = 'inline-block';
            pageInfo.style.verticalAlign = 'top';
            pageInfo.style.fontFamily = 'Helvetica,Arial';
            pageInfo.style.marginTop = '8px';
            pageInfo.style.fontSize = '14px';
            pageInfo.style.color = '#ffffff';
            this.chromelessToolbar.appendChild(pageInfo);

            var nextButton = addButton(mxUtils.bind(this, function (evt) {
                this.actions.get('nextPage').funct();
                mxEvent.consume(evt);
            }), Editor.nextLargeImage, mxResources.get('nextPage'));

            var updatePageInfo = mxUtils.bind(this, function () {
                if (this.pages != null && this.pages.length > 1 && this.currentPage != null) {
                    pageInfo.innerHTML = '';
                    mxUtils.write(pageInfo, (mxUtils.indexOf(this.pages, this.currentPage) + 1) + ' / ' + this.pages.length);
                }
            });

            prevButton.style.paddingLeft = '0px';
            prevButton.style.paddingRight = '4px';
            nextButton.style.paddingLeft = '4px';
            nextButton.style.paddingRight = '0px';

            var updatePageButtons = mxUtils.bind(this, function () {
                if (this.pages != null && this.pages.length > 1 && this.currentPage != null) {
                    nextButton.style.display = '';
                    prevButton.style.display = '';
                    pageInfo.style.display = 'inline-block';
                } else {
                    nextButton.style.display = 'none';
                    prevButton.style.display = 'none';
                    pageInfo.style.display = 'none';
                }

                updatePageInfo();
            });

            this.editor.addListener('resetGraphView', updatePageButtons);
            this.editor.addListener('pageSelected', updatePageInfo);

            addButton(mxUtils.bind(this, function (evt) {
                this.actions.get('zoomOut').funct();
                mxEvent.consume(evt);
            }), Editor.zoomOutLargeImage, mxResources.get('zoomOut') + ' (Alt+Mousewheel)');

            addButton(mxUtils.bind(this, function (evt) {
                this.actions.get('zoomIn').funct();
                mxEvent.consume(evt);
            }), Editor.zoomInLargeImage, mxResources.get('zoomIn') + ' (Alt+Mousewheel)');

            addButton(mxUtils.bind(this, function (evt) {
                if (graph.isLightboxView()) {
                    if (graph.view.scale == 1) {
                        this.lightboxFit();
                    } else {
                        graph.zoomTo(1);
                    }

                    this.chromelessResize(false);
                } else {
                    this.chromelessResize(true);
                }

                mxEvent.consume(evt);
            }), Editor.actualSizeLargeImage, mxResources.get('fit'));

            // Changes toolbar opacity on hover
            var fadeThread = null;
            var fadeThread2 = null;

            var fadeOut = mxUtils.bind(this, function (delay) {
                if (fadeThread != null) {
                    window.clearTimeout(fadeThread);
                    fadeThead = null;
                }

                if (fadeThread2 != null) {
                    window.clearTimeout(fadeThread2);
                    fadeThead2 = null;
                }

                fadeThread = window.setTimeout(mxUtils.bind(this, function () {
                    mxUtils.setOpacity(this.chromelessToolbar, 0);
                    fadeThread = null;

                    fadeThread2 = window.setTimeout(mxUtils.bind(this, function () {
                        this.chromelessToolbar.style.display = 'none';
                        fadeThread2 = null;
                    }), 600);
                }), delay || 200);
            });

            var fadeIn = mxUtils.bind(this, function (opacity) {
                if (fadeThread != null) {
                    window.clearTimeout(fadeThread);
                    fadeThead = null;
                }

                if (fadeThread2 != null) {
                    window.clearTimeout(fadeThread2);
                    fadeThead2 = null;
                }

                this.chromelessToolbar.style.display = '';
                mxUtils.setOpacity(this.chromelessToolbar, opacity || 30);
            });

            if (urlParams['layers'] == '1') {
                this.layersDialog = null;

                var layersButton = addButton(mxUtils.bind(this, function (evt) {
                    if (this.layersDialog != null) {
                        this.layersDialog.parentNode.removeChild(this.layersDialog);
                        this.layersDialog = null;
                    } else {
                        this.layersDialog = graph.createLayersDialog();

                        mxEvent.addListener(this.layersDialog, 'mouseleave', mxUtils.bind(this, function () {
                            this.layersDialog.parentNode.removeChild(this.layersDialog);
                            this.layersDialog = null;
                        }));

                        var r = layersButton.getBoundingClientRect();

                        mxUtils.setPrefixedStyle(this.layersDialog.style, 'borderRadius', '5px');
                        this.layersDialog.style.position = 'fixed';
                        this.layersDialog.style.fontFamily = 'Helvetica,Arial';
                        this.layersDialog.style.backgroundColor = '#000000';
                        this.layersDialog.style.width = '160px';
                        this.layersDialog.style.padding = '4px 2px 4px 2px';
                        this.layersDialog.style.color = '#ffffff';
                        mxUtils.setOpacity(this.layersDialog, 70);
                        this.layersDialog.style.left = r.left + 'px';
                        this.layersDialog.style.bottom = parseInt(this.chromelessToolbar.style.bottom) +
                            this.chromelessToolbar.offsetHeight + 4 + 'px';

                        // Puts the dialog on top of the container z-index
                        var style = mxUtils.getCurrentStyle(this.editor.graph.container);
                        this.layersDialog.style.zIndex = style.zIndex;

                        document.body.appendChild(this.layersDialog);
                    }

                    mxEvent.consume(evt);
                }), Editor.layersLargeImage, mxResources.get('layers'));

                // Shows/hides layers button depending on content
                var model = graph.getModel();

                model.addListener(mxEvent.CHANGE, function () {
                    layersButton.style.display = (model.getChildCount(model.root) > 1) ? '' : 'none';
                });
            }

            this.addChromelessToolbarItems(addButton);

            if (this.editor.editButtonLink != null || this.editor.editButtonFunc != null) {
                addButton(mxUtils.bind(this, function (evt) {
                    if (this.editor.editButtonFunc != null) {
                        this.editor.editButtonFunc();
                    } else if (this.editor.editButtonLink == '_blank') {
                        this.editor.editAsNew(this.getEditBlankXml());
                    } else {
                        graph.openLink(this.editor.editButtonLink, 'editWindow');
                    }

                    mxEvent.consume(evt);
                }), Editor.editLargeImage, mxResources.get('edit'));
            }

            if (this.lightboxToolbarActions != null) {
                for (var i = 0; i < this.lightboxToolbarActions.length; i++) {
                    var lbAction = this.lightboxToolbarActions[i];
                    addButton(lbAction.fn, lbAction.icon, lbAction.tooltip);
                }
            }

            if (toolbarConfig.refreshBtn != null) {
                addButton(mxUtils.bind(this, function (evt) {
                    if (toolbarConfig.refreshBtn.url) {
                        window.location.href = toolbarConfig.refreshBtn.url;
                    } else {
                        window.location.reload();
                    }

                    mxEvent.consume(evt);
                }), Editor.refreshLargeImage, mxResources.get('refresh', null, 'Refresh'));
            }

            if (toolbarConfig.fullscreenBtn != null && window.self !== window.top) {
                addButton(mxUtils.bind(this, function (evt) {
                    if (toolbarConfig.fullscreenBtn.url) {
                        graph.openLink(toolbarConfig.fullscreenBtn.url);
                    } else {
                        graph.openLink(window.location.href);
                    }

                    mxEvent.consume(evt);
                }), Editor.fullscreenLargeImage, mxResources.get('openInNewWindow', null, 'Open in New Window'));
            }

            if ((toolbarConfig.closeBtn && window.self === window.top) ||
                (graph.lightbox && (urlParams['close'] == '1' || this.container != document.body))) {
                addButton(mxUtils.bind(this, function (evt) {
                    if (urlParams['close'] == '1' || toolbarConfig.closeBtn) {
                        window.close();
                    } else {
                        this.destroy();
                        mxEvent.consume(evt);
                    }
                }), Editor.closeLargeImage, mxResources.get('close') + ' (Escape)');
            }

            // Initial state invisible
            this.chromelessToolbar.style.display = 'none';

            if (!graph.isViewer()) {
                mxUtils.setPrefixedStyle(this.chromelessToolbar.style, 'transform', 'translate(-50%,0)');
            }

            graph.container.appendChild(this.chromelessToolbar);

            mxEvent.addListener(graph.container, (mxClient.IS_POINTER) ? 'pointermove' : 'mousemove', mxUtils.bind(this, function (evt) {
                if (!mxEvent.isTouchEvent(evt)) {
                    if (!mxEvent.isShiftDown(evt)) {
                        fadeIn(30);
                    }

                    fadeOut();
                }
            }));

            mxEvent.addListener(this.chromelessToolbar, (mxClient.IS_POINTER) ? 'pointermove' : 'mousemove', function (evt) {
                mxEvent.consume(evt);
            });

            mxEvent.addListener(this.chromelessToolbar, 'mouseenter', mxUtils.bind(this, function (evt) {
                if (!mxEvent.isShiftDown(evt)) {
                    fadeIn(100);
                } else {
                    fadeOut();
                }
            }));

            mxEvent.addListener(this.chromelessToolbar, 'mousemove', mxUtils.bind(this, function (evt) {
                if (!mxEvent.isShiftDown(evt)) {
                    fadeIn(100);
                } else {
                    fadeOut();
                }

                mxEvent.consume(evt);
            }));

            mxEvent.addListener(this.chromelessToolbar, 'mouseleave', mxUtils.bind(this, function (evt) {
                if (!mxEvent.isTouchEvent(evt)) {
                    fadeIn(30);
                }
            }));

            // Shows/hides toolbar for touch devices
            var tol = graph.getTolerance();

            graph.addMouseListener(
                {
                    startX: 0,
                    startY: 0,
                    scrollLeft: 0,
                    scrollTop: 0,
                    mouseDown: function (sender, me) {
                        this.startX = me.getGraphX();
                        this.startY = me.getGraphY();
                        this.scrollLeft = graph.container.scrollLeft;
                        this.scrollTop = graph.container.scrollTop;
                    },
                    mouseMove: function (sender, me) {
                    },
                    mouseUp: function (sender, me) {
                        if (mxEvent.isTouchEvent(me.getEvent())) {
                            if ((Math.abs(this.scrollLeft - graph.container.scrollLeft) < tol &&
                                Math.abs(this.scrollTop - graph.container.scrollTop) < tol) &&
                                (Math.abs(this.startX - me.getGraphX()) < tol &&
                                    Math.abs(this.startY - me.getGraphY()) < tol)) {
                                if (parseFloat(ui.chromelessToolbar.style.opacity || 0) > 0) {
                                    fadeOut();
                                } else {
                                    fadeIn(30);
                                }
                            }
                        }
                    }
                });
        } // end if toolbar

        // Installs handling of highlight and handling links to relative links and anchors
        if (!this.editor.editable) {
            this.addChromelessClickHandler();
        }
    } else if (this.editor.extendCanvas) {
        /**
         * Guesses autoTranslate to avoid another repaint (see below).
         * Works if only the scale of the graph changes or if pages
         * are visible and the visible pages do not change.
         */
        var graphViewValidate = graph.view.validate;
        graph.view.validate = function () {
            if (this.graph.container != null && mxUtils.hasScrollbars(this.graph.container)) {
                var pad = this.graph.getPagePadding();
                var size = this.graph.getPageSize();

                // Updating scrollbars here causes flickering in quirks and is not needed
                // if zoom method is always used to set the current scale on the graph.
                var tx = this.translate.x;
                var ty = this.translate.y;
                this.translate.x = pad.x - (this.x0 || 0) * size.width;
                this.translate.y = pad.y - (this.y0 || 0) * size.height;
            }

            graphViewValidate.apply(this, arguments);
        };

        if (!graph.isViewer()) {
            var graphSizeDidChange = graph.sizeDidChange;

            graph.sizeDidChange = function () {
                if (this.container != null && mxUtils.hasScrollbars(this.container)) {
                    var pages = this.getPageLayout();
                    var pad = this.getPagePadding();
                    var size = this.getPageSize();

                    // Updates the minimum graph size
                    var minw = Math.ceil(2 * pad.x + pages.width * size.width);
                    var minh = Math.ceil(2 * pad.y + pages.height * size.height);

                    var min = graph.minimumGraphSize;

                    // LATER: Fix flicker of scrollbar size in IE quirks mode
                    // after delayed call in window.resize event handler
                    if (min == null || min.width != minw || min.height != minh) {
                        graph.minimumGraphSize = new mxRectangle(0, 0, minw, minh);
                    }

                    // Updates auto-translate to include padding and graph size
                    var dx = pad.x - pages.x * size.width;
                    var dy = pad.y - pages.y * size.height;

                    if (!this.autoTranslate && (this.view.translate.x != dx || this.view.translate.y != dy)) {
                        this.autoTranslate = true;
                        this.view.x0 = pages.x;
                        this.view.y0 = pages.y;

                        // NOTE: THIS INVOKES THIS METHOD AGAIN. UNFORTUNATELY THERE IS NO WAY AROUND THIS SINCE THE
                        // BOUNDS ARE KNOWN AFTER THE VALIDATION AND SETTING THE TRANSLATE TRIGGERS A REVALIDATION.
                        // SHOULD MOVE TRANSLATE/SCALE TO VIEW.
                        var tx = graph.view.translate.x;
                        var ty = graph.view.translate.y;
                        graph.view.setTranslate(dx, dy);

                        // LATER: Fix rounding errors for small zoom
                        graph.container.scrollLeft += Math.round((dx - tx) * graph.view.scale);
                        graph.container.scrollTop += Math.round((dy - ty) * graph.view.scale);

                        this.autoTranslate = false;

                        return;
                    }

                    graphSizeDidChange.apply(this, arguments);
                } else {
                    // Fires event but does not invoke superclass
                    this.fireEvent(new mxEventObject(mxEvent.SIZE, 'bounds', this.getGraphBounds()));
                }
            };
        }
    }

    // Accumulates the zoom factor while the rendering is taking place
    // so that not the complete sequence of zoom steps must be painted
    graph.updateZoomTimeout = null;
    graph.cumulativeZoomFactor = 1;

    var cursorPosition = null;

    graph.lazyZoom = function (zoomIn) {
        if (this.updateZoomTimeout != null) {
            window.clearTimeout(this.updateZoomTimeout);
        }

        // Switches to 1% zoom steps below 15%
        // Lower bound depdends on rounding below
        if (zoomIn) {
            if (this.view.scale * this.cumulativeZoomFactor < 0.15) {
                this.cumulativeZoomFactor = (this.view.scale + 0.01) / this.view.scale;
            } else {
                // Uses to 5% zoom steps for better grid rendering in webkit
                // and to avoid rounding errors for zoom steps
                this.cumulativeZoomFactor *= this.zoomFactor;
                this.cumulativeZoomFactor = Math.round(this.view.scale * this.cumulativeZoomFactor * 20) / 20 / this.view.scale;
            }
        } else {
            if (this.view.scale * this.cumulativeZoomFactor <= 0.15) {
                this.cumulativeZoomFactor = (this.view.scale - 0.01) / this.view.scale;
            } else {
                // Uses to 5% zoom steps for better grid rendering in webkit
                // and to avoid rounding errors for zoom steps
                this.cumulativeZoomFactor /= this.zoomFactor;
                this.cumulativeZoomFactor = Math.round(this.view.scale * this.cumulativeZoomFactor * 20) / 20 / this.view.scale;
            }
        }

        this.cumulativeZoomFactor = Math.max(0.01, Math.min(this.view.scale * this.cumulativeZoomFactor, 160) / this.view.scale);

        this.updateZoomTimeout = window.setTimeout(mxUtils.bind(this, function () {
            var offset = mxUtils.getOffset(graph.container);
            var dx = 0;
            var dy = 0;

            if (cursorPosition != null) {
                dx = graph.container.offsetWidth / 2 - cursorPosition.x + offset.x;
                dy = graph.container.offsetHeight / 2 - cursorPosition.y + offset.y;
            }

            var prev = this.view.scale;
            this.zoom(this.cumulativeZoomFactor);
            var s = this.view.scale;

            if (s != prev) {
                if (resize != null) {
                    ui.chromelessResize(false, null, dx * (this.cumulativeZoomFactor - 1),
                        dy * (this.cumulativeZoomFactor - 1));
                }

                if (mxUtils.hasScrollbars(graph.container) && (dx != 0 || dy != 0)) {
                    graph.container.scrollLeft -= dx * (this.cumulativeZoomFactor - 1);
                    graph.container.scrollTop -= dy * (this.cumulativeZoomFactor - 1);
                }
            }

            this.cumulativeZoomFactor = 1;
            this.updateZoomTimeout = null;
        }), this.lazyZoomDelay);
    };

    mxEvent.addMouseWheelListener(mxUtils.bind(this, function (evt, up) {
        // Ctrl+wheel (or pinch on touchpad) is a native browser zoom event is OS X
        // LATER: Add support for zoom via pinch on trackpad for Chrome in OS X
        if ((this.dialogs == null || this.dialogs.length == 0) && graph.isZoomWheelEvent(evt)) {
            var source = mxEvent.getSource(evt);

            while (source != null) {
                if (source == graph.container) {
                    cursorPosition = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
                    graph.lazyZoom(up);
                    mxEvent.consume(evt);

                    return false;
                }

                source = source.parentNode;
            }
        }
    }), graph.container);
};

/**
 * Creates a temporary graph instance for rendering off-screen content.
 */
EditorUi.prototype.addChromelessToolbarItems = function (addButton) {
    addButton(mxUtils.bind(this, function (evt) {
        this.actions.get('print').funct();
        mxEvent.consume(evt);
    }), Editor.printLargeImage, mxResources.get('print'));
};

/**
 * Creates a temporary graph instance for rendering off-screen content.
 */
EditorUi.prototype.createTemporaryGraph = function (stylesheet) {
    var graph = new Graph(document.createElement('div'), null, null, stylesheet);
    graph.resetViewOnRootChange = false;
    graph.setConnectable(false);
    graph.gridEnabled = false;
    graph.autoScroll = false;
    graph.setTooltips(false);
    graph.setEnabled(false);

    // Container must be in the DOM for correct HTML rendering
    graph.container.style.visibility = 'hidden';
    graph.container.style.position = 'absolute';
    graph.container.style.overflow = 'hidden';
    graph.container.style.height = '1px';
    graph.container.style.width = '1px';

    return graph;
};

/**
 *
 */
EditorUi.prototype.addChromelessClickHandler = function () {
    var hl = urlParams['highlight'];

    // Adds leading # for highlight color code
    if (hl != null && hl.length > 0) {
        hl = '#' + hl;
    }

    this.editor.graph.addClickHandler(hl);
};

/**
 *
 */
EditorUi.prototype.toggleFormatPanel = function (forceHide) {
    if (this.format != null) {
        this.formatWidth = (forceHide || this.formatWidth > 0) ? 0 : 400;
        this.formatContainer.style.display = (forceHide || this.formatWidth > 0) ? '' : 'none';
        this.refresh();
        this.format.refresh();
        this.fireEvent(new mxEventObject('formatWidthChanged'));
    }
};

/**
 * Adds support for placeholders in labels.
 */
EditorUi.prototype.lightboxFit = function (maxHeight) {
    if (this.isDiagramEmpty()) {
        this.editor.graph.view.setScale(1);
    } else {
        var p = urlParams['border'];
        var border = 60;

        if (p != null) {
            border = parseInt(p);
        }

        // LATER: Use initial graph bounds to avoid rounding errors
        this.editor.graph.maxFitScale = this.lightboxMaxFitScale;
        this.editor.graph.fit(border, null, null, null, null, null, maxHeight);
        this.editor.graph.maxFitScale = null;
    }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.isDiagramEmpty = function () {
    var model = this.editor.graph.getModel();

    return model.getChildCount(model.root) == 1 && model.getChildCount(model.getChildAt(model.root, 0)) == 0;
};

/**
 * Hook for allowing selection and context menu for certain events.
 */
EditorUi.prototype.isSelectionAllowed = function (evt) {
    return mxEvent.getSource(evt).nodeName == 'SELECT' || (mxEvent.getSource(evt).nodeName == 'INPUT' &&
        mxUtils.isAncestorNode(this.formatContainer, mxEvent.getSource(evt)));
};

/**
 * Installs dialog if browser window is closed without saving
 * This must be disabled during save and image export.
 */
EditorUi.prototype.addBeforeUnloadListener = function () {
    // Installs dialog if browser window is closed without saving
    // This must be disabled during save and image export
    window.onbeforeunload = mxUtils.bind(this, function () {
        if (!this.editor.isChromelessView()) {
            return this.onBeforeUnload();
        }
    });
};

/**
 * Sets the onbeforeunload for the application
 */
EditorUi.prototype.onBeforeUnload = function () {
    if (this.editor.modified) {
        return mxResources.get('allChangesLost');
    }
};

/**
 * Opens the current diagram via the window.opener if one exists.
 */
EditorUi.prototype.open = function () {
    // Cross-domain window access is not allowed in FF, so if we
    // were opened from another domain then this will fail.
    try {
        if (window.opener != null && window.opener.openFile != null) {
            window.opener.openFile.setConsumer(mxUtils.bind(this, function (xml, filename) {
                try {
                    var doc = mxUtils.parseXml(xml);
                    this.editor.setGraphXml(doc.documentElement);
                    this.editor.setModified(false);
                    this.editor.undoManager.clear();

                    if (filename != null) {
                        this.editor.setFilename(filename);
                        this.updateDocumentTitle();
                    }

                    return;
                } catch (e) {
                    mxUtils.alert(mxResources.get('invalidOrMissingFile') + ': ' + e.message);
                }
            }));
        }
    } catch (e) {
        // ignore
    }

    // Fires as the last step if no file was loaded
    this.editor.graph.view.validate();

    // Required only in special cases where an initial file is opened
    // and the minimumGraphSize changes and CSS must be updated.
    this.editor.graph.sizeDidChange();
    this.editor.fireEvent(new mxEventObject('resetGraphView'));
};

/**
 * Sets the current menu and element.
 */
EditorUi.prototype.setCurrentMenu = function (menu, elt) {
    this.currentMenuElt = elt;
    this.currentMenu = menu;
};

/**
 * Resets the current menu and element.
 */
EditorUi.prototype.resetCurrentMenu = function () {
    this.currentMenuElt = null;
    this.currentMenu = null;
};

/**
 * Hides and destroys the current menu.
 */
EditorUi.prototype.hideCurrentMenu = function () {
    if (this.currentMenu != null) {
        this.currentMenu.hideMenu();
        this.resetCurrentMenu();
    }
};

/**
 * Updates the document title.
 */
EditorUi.prototype.updateDocumentTitle = function () {
    var title = this.editor.getOrCreateFilename();

    if (this.editor.appName != null) {
        title += ' - ' + this.editor.appName;
    }

    document.title = title;
};

/**
 * Updates the document title.
 */
EditorUi.prototype.createHoverIcons = function () {
    return new HoverIcons(this.editor.graph);
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.redo = function () {
    try {
        var graph = this.editor.graph;

        if (graph.isEditing()) {
            document.execCommand('redo', false, null);
        } else {
            this.editor.undoManager.redo();
        }
    } catch (e) {
        // ignore all errors
    }
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.undo = function () {
    try {
        var graph = this.editor.graph;

        if (graph.isEditing()) {
            // Stops editing and executes undo on graph if native undo
            // does not affect current editing value
            var value = graph.cellEditor.textarea.innerHTML;
            document.execCommand('undo', false, null);

            if (value == graph.cellEditor.textarea.innerHTML) {
                graph.stopEditing(true);
                this.editor.undoManager.undo();
            }
        } else {
            this.editor.undoManager.undo();
        }
    } catch (e) {
        // ignore all errors
    }
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.canRedo = function () {
    return this.editor.graph.isEditing() || this.editor.undoManager.canRedo();
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.canUndo = function () {
    return this.editor.graph.isEditing() || this.editor.undoManager.canUndo();
};

/**
 *
 */
EditorUi.prototype.getEditBlankXml = function () {
    return mxUtils.getXml(this.editor.getGraphXml());
};

/**
 * Returns the URL for a copy of this editor with no state.
 */
EditorUi.prototype.getUrl = function (pathname) {
    var href = (pathname != null) ? pathname : window.location.pathname;
    var parms = (href.indexOf('?') > 0) ? 1 : 0;

    // Removes template URL parameter for new blank diagram
    for (var key in urlParams) {
        if (parms == 0) {
            href += '?';
        } else {
            href += '&';
        }

        href += key + '=' + urlParams[key];
        parms++;
    }

    return href;
};

/**
 * Specifies if the graph has scrollbars.
 */
EditorUi.prototype.setScrollbars = function (value) {
    var graph = this.editor.graph;
    var prev = graph.container.style.overflow;
    graph.scrollbars = value;
    this.editor.updateGraphComponents();

    if (prev != graph.container.style.overflow) {
        if (graph.container.style.overflow == 'hidden') {
            var t = graph.view.translate;
            graph.view.setTranslate(t.x - graph.container.scrollLeft / graph.view.scale, t.y - graph.container.scrollTop / graph.view.scale);
            graph.container.scrollLeft = 0;
            graph.container.scrollTop = 0;
            graph.minimumGraphSize = null;
            graph.sizeDidChange();
        } else {
            var dx = graph.view.translate.x;
            var dy = graph.view.translate.y;

            graph.view.translate.x = 0;
            graph.view.translate.y = 0;
            graph.sizeDidChange();
            graph.container.scrollLeft -= Math.round(dx * graph.view.scale);
            graph.container.scrollTop -= Math.round(dy * graph.view.scale);
        }
    }

    this.fireEvent(new mxEventObject('scrollbarsChanged'));
};

/**
 * Returns true if the graph has scrollbars.
 */
EditorUi.prototype.hasScrollbars = function () {
    return this.editor.graph.scrollbars;
};

/**
 * Resets the state of the scrollbars.
 */
EditorUi.prototype.resetScrollbars = function () {
    var graph = this.editor.graph;

    if (!this.editor.extendCanvas) {
        graph.container.scrollTop = 0;
        graph.container.scrollLeft = 0;

        if (!mxUtils.hasScrollbars(graph.container)) {
            graph.view.setTranslate(0, 0);
        }
    } else if (!this.editor.isChromelessView()) {
        if (mxUtils.hasScrollbars(graph.container)) {
            if (graph.pageVisible) {
                var pad = graph.getPagePadding();
                graph.container.scrollTop = Math.floor(pad.y - this.editor.initialTopSpacing) - 1;
                graph.container.scrollLeft = Math.floor(Math.min(pad.x,
                    (graph.container.scrollWidth - graph.container.clientWidth) / 2)) - 1;

                // Scrolls graph to visible area
                var bounds = graph.getGraphBounds();

                if (bounds.width > 0 && bounds.height > 0) {
                    if (bounds.x > graph.container.scrollLeft + graph.container.clientWidth * 0.9) {
                        graph.container.scrollLeft = Math.min(bounds.x + bounds.width - graph.container.clientWidth, bounds.x - 10);
                    }

                    if (bounds.y > graph.container.scrollTop + graph.container.clientHeight * 0.9) {
                        graph.container.scrollTop = Math.min(bounds.y + bounds.height - graph.container.clientHeight, bounds.y - 10);
                    }
                }
            } else {
                var bounds = graph.getGraphBounds();
                var width = Math.max(bounds.width, graph.scrollTileSize.width * graph.view.scale);
                var height = Math.max(bounds.height, graph.scrollTileSize.height * graph.view.scale);
                graph.container.scrollTop = Math.floor(Math.max(0, bounds.y - Math.max(20, (graph.container.clientHeight - height) / 4)));
                graph.container.scrollLeft = Math.floor(Math.max(0, bounds.x - Math.max(0, (graph.container.clientWidth - width) / 2)));
            }
        } else {
            // This code is not actively used since the default for scrollbars is always true
            if (graph.pageVisible) {
                var b = graph.view.getBackgroundPageBounds();
                graph.view.setTranslate(Math.floor(Math.max(0, (graph.container.clientWidth - b.width) / 2) - b.x),
                    Math.floor(Math.max(0, (graph.container.clientHeight - b.height) / 2) - b.y));
            } else {
                var bounds = graph.getGraphBounds();
                graph.view.setTranslate(Math.floor(Math.max(0, Math.max(0, (graph.container.clientWidth - bounds.width) / 2) - bounds.x)),
                    Math.floor(Math.max(0, Math.max(20, (graph.container.clientHeight - bounds.height) / 4)) - bounds.y));
            }
        }
    }
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageVisible = function (value) {
    var graph = this.editor.graph;
    var hasScrollbars = mxUtils.hasScrollbars(graph.container);
    var tx = 0;
    var ty = 0;

    if (hasScrollbars) {
        tx = graph.view.translate.x * graph.view.scale - graph.container.scrollLeft;
        ty = graph.view.translate.y * graph.view.scale - graph.container.scrollTop;
    }

    graph.pageVisible = value;
    graph.pageBreaksVisible = value;
    graph.preferPageSize = value;
    graph.view.validateBackground();

    // Workaround for possible handle offset
    if (hasScrollbars) {
        var cells = graph.getSelectionCells();
        graph.clearSelection();
        graph.setSelectionCells(cells);
    }

    // Calls updatePageBreaks
    graph.sizeDidChange();

    if (hasScrollbars) {
        graph.container.scrollLeft = graph.view.translate.x * graph.view.scale - tx;
        graph.container.scrollTop = graph.view.translate.y * graph.view.scale - ty;
    }

    this.fireEvent(new mxEventObject('pageViewChanged'));
};

/**
 * Change types
 */
function ChangePageSetup(ui, color, image, format) {
    this.ui = ui;
    this.color = color;
    this.previousColor = color;
    this.image = image;
    this.previousImage = image;
    this.format = format;
    this.previousFormat = format;

    // Needed since null are valid values for color and image
    this.ignoreColor = false;
    this.ignoreImage = false;
}

/**
 * Implementation of the undoable page rename.
 */
ChangePageSetup.prototype.execute = function () {
    var graph = this.ui.editor.graph;

    if (!this.ignoreColor) {
        this.color = this.previousColor;
        var tmp = graph.background;
        this.ui.setBackgroundColor(this.previousColor);
        this.previousColor = tmp;
    }

    if (!this.ignoreImage) {
        this.image = this.previousImage;
        var tmp = graph.backgroundImage;
        this.ui.setBackgroundImage(this.previousImage);
        this.previousImage = tmp;
    }

    if (this.previousFormat != null) {
        this.format = this.previousFormat;
        var tmp = graph.pageFormat;

        if (this.previousFormat.width != tmp.width ||
            this.previousFormat.height != tmp.height) {
            this.ui.setPageFormat(this.previousFormat);
            this.previousFormat = tmp;
        }
    }

    if (this.foldingEnabled != null && this.foldingEnabled != this.ui.editor.graph.foldingEnabled) {
        this.ui.setFoldingEnabled(this.foldingEnabled);
        this.foldingEnabled = !this.foldingEnabled;
    }
};

// Registers codec for ChangePageSetup
(function () {
    var codec = new mxObjectCodec(new ChangePageSetup(), ['ui', 'previousColor', 'previousImage', 'previousFormat']);

    codec.afterDecode = function (dec, node, obj) {
        obj.previousColor = obj.color;
        obj.previousImage = obj.image;
        obj.previousFormat = obj.format;

        if (obj.foldingEnabled != null) {
            obj.foldingEnabled = !obj.foldingEnabled;
        }

        return obj;
    };

    mxCodecRegistry.register(codec);
})();

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setBackgroundColor = function (value) {
    this.editor.graph.background = value;
    this.editor.graph.view.validateBackground();

    this.fireEvent(new mxEventObject('backgroundColorChanged'));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setFoldingEnabled = function (value) {
    this.editor.graph.foldingEnabled = value;
    this.editor.graph.view.revalidate();

    this.fireEvent(new mxEventObject('foldingEnabledChanged'));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageFormat = function (value) {
    this.editor.graph.pageFormat = value;

    if (!this.editor.graph.pageVisible) {
        this.actions.get('pageView').funct();
    } else {
        this.editor.graph.view.validateBackground();
        this.editor.graph.sizeDidChange();
    }

    this.fireEvent(new mxEventObject('pageFormatChanged'));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setPageScale = function (value) {
    this.editor.graph.pageScale = value;

    if (!this.editor.graph.pageVisible) {
        this.actions.get('pageView').funct();
    } else {
        this.editor.graph.view.validateBackground();
        this.editor.graph.sizeDidChange();
    }

    this.fireEvent(new mxEventObject('pageScaleChanged'));
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setGridColor = function (value) {
    this.editor.graph.view.gridColor = value;
    this.editor.graph.view.validateBackground();
    this.fireEvent(new mxEventObject('gridColorChanged'));
};

/**
 * Updates the states of the given undo/redo items.
 */
EditorUi.prototype.addUndoListener = function () {
    var undo = this.actions.get('undo');
    var redo = this.actions.get('redo');

    var undoMgr = this.editor.undoManager;

    var undoListener = mxUtils.bind(this, function () {
        undo.setEnabled(this.canUndo());
        redo.setEnabled(this.canRedo());
    });

    undoMgr.addListener(mxEvent.ADD, undoListener);
    undoMgr.addListener(mxEvent.UNDO, undoListener);
    undoMgr.addListener(mxEvent.REDO, undoListener);
    undoMgr.addListener(mxEvent.CLEAR, undoListener);

    // Overrides cell editor to update action states
    var cellEditorStartEditing = this.editor.graph.cellEditor.startEditing;

    this.editor.graph.cellEditor.startEditing = function () {
        cellEditorStartEditing.apply(this, arguments);
        undoListener();
    };

    var cellEditorStopEditing = this.editor.graph.cellEditor.stopEditing;

    this.editor.graph.cellEditor.stopEditing = function (cell, trigger) {
        cellEditorStopEditing.apply(this, arguments);
        undoListener();
    };

    // Updates the button states once
    undoListener();
};

/**
 * Updates the states of the given toolbar items based on the selection.
 */
EditorUi.prototype.updateActionStates = function () {
    var graph = this.editor.graph;
    var selected = !graph.isSelectionEmpty();
    var vertexSelected = false;
    var edgeSelected = false;

    var cells = graph.getSelectionCells();

    if (cells != null) {
        for (var i = 0; i < cells.length; i++) {
            var cell = cells[i];

            if (graph.getModel().isEdge(cell)) {
                edgeSelected = true;
            }

            if (graph.getModel().isVertex(cell)) {
                vertexSelected = true;
            }

            if (edgeSelected && vertexSelected) {
                break;
            }
        }
    }

    // Updates action states
    var actions = ['cut', 'copy', 'bold', 'italic', 'underline', 'delete', 'duplicate',
        'editStyle', 'editTooltip', 'editLink', 'backgroundColor', 'borderColor',
        'edit', 'toFront', 'toBack', 'lockUnlock', 'solid', 'dashed', 'pasteSize',
        'dotted', 'fillColor', 'gradientColor', 'shadow', 'fontColor',
        'formattedText', 'rounded', 'toggleRounded', 'sharp', 'strokeColor'];

    for (var i = 0; i < actions.length; i++) {
        this.actions.get(actions[i]).setEnabled(selected);
    }

    this.actions.get('setAsDefaultStyle').setEnabled(graph.getSelectionCount() == 1);
    this.actions.get('clearWaypoints').setEnabled(!graph.isSelectionEmpty());
    this.actions.get('copySize').setEnabled(graph.getSelectionCount() == 1);
    this.actions.get('turn').setEnabled(!graph.isSelectionEmpty());
    this.actions.get('curved').setEnabled(edgeSelected);
    this.actions.get('rotation').setEnabled(vertexSelected);
    this.actions.get('wordWrap').setEnabled(vertexSelected);
    this.actions.get('autosize').setEnabled(vertexSelected);
    var oneVertexSelected = vertexSelected && graph.getSelectionCount() == 1;
    this.actions.get('group').setEnabled(graph.getSelectionCount() > 1 ||
        (oneVertexSelected && !graph.isContainer(graph.getSelectionCell())));
    this.actions.get('ungroup').setEnabled(graph.getSelectionCount() == 1 &&
        (graph.getModel().getChildCount(graph.getSelectionCell()) > 0 ||
            (oneVertexSelected && graph.isContainer(graph.getSelectionCell()))));
    this.actions.get('removeFromGroup').setEnabled(oneVertexSelected &&
        graph.getModel().isVertex(graph.getModel().getParent(graph.getSelectionCell())));

    // Updates menu states
    var state = graph.view.getState(graph.getSelectionCell());
    this.menus.get('navigation').setEnabled(selected || graph.view.currentRoot != null);
    this.actions.get('collapsible').setEnabled(vertexSelected &&
        (graph.isContainer(graph.getSelectionCell()) || graph.model.getChildCount(graph.getSelectionCell()) > 0));
    this.actions.get('home').setEnabled(graph.view.currentRoot != null);
    this.actions.get('exitGroup').setEnabled(graph.view.currentRoot != null);
    this.actions.get('enterGroup').setEnabled(graph.getSelectionCount() == 1 && graph.isValidRoot(graph.getSelectionCell()));
    var foldable = graph.getSelectionCount() == 1 && graph.isCellFoldable(graph.getSelectionCell());
    this.actions.get('expand').setEnabled(foldable);
    this.actions.get('collapse').setEnabled(foldable);
    this.actions.get('editLink').setEnabled(graph.getSelectionCount() == 1);
    this.actions.get('openLink').setEnabled(graph.getSelectionCount() == 1 &&
        graph.getLinkForCell(graph.getSelectionCell()) != null);
    this.actions.get('guides').setEnabled(graph.isEnabled());
    this.actions.get('grid').setEnabled(!this.editor.chromeless || this.editor.editable);

    var unlocked = graph.isEnabled() && !graph.isCellLocked(graph.getDefaultParent());
    this.menus.get('layout').setEnabled(unlocked);
    this.menus.get('insert').setEnabled(unlocked);
    this.menus.get('direction').setEnabled(unlocked && vertexSelected);
    this.menus.get('align').setEnabled(unlocked && vertexSelected && graph.getSelectionCount() > 1);
    this.menus.get('distribute').setEnabled(unlocked && vertexSelected && graph.getSelectionCount() > 1);
    this.actions.get('selectVertices').setEnabled(unlocked);
    this.actions.get('selectEdges').setEnabled(unlocked);
    this.actions.get('selectAll').setEnabled(unlocked);
    this.actions.get('selectNone').setEnabled(unlocked);

    this.updatePasteActionStates();
};

EditorUi.prototype.zeroOffset = new mxPoint(0, 0);

EditorUi.prototype.getDiagramContainerOffset = function () {
    return this.zeroOffset;
};

/**
 * Refreshes the viewport.
 */
EditorUi.prototype.refresh = function (sizeDidChange) {
    sizeDidChange = (sizeDidChange != null) ? sizeDidChange : true;

    var quirks = mxClient.IS_IE && (document.documentMode == null || document.documentMode == 5);
    var w = this.container.clientWidth;
    var h = this.container.clientHeight;

    if (this.container == document.body) {
        w = document.body.clientWidth || document.documentElement.clientWidth;
        h = (quirks) ? document.body.clientHeight || document.documentElement.clientHeight : document.documentElement.clientHeight;
    }

    // Workaround for bug on iOS see
    // http://stackoverflow.com/questions/19012135/ios-7-ipad-safari-landscape-innerheight-outerheight-layout-issue
    // FIXME: Fix if footer visible
    var off = 0;

    if (mxClient.IS_IOS && !window.navigator.standalone) {
        if (window.innerHeight != document.documentElement.clientHeight) {
            off = document.documentElement.clientHeight - window.innerHeight;
            window.scrollTo(0, 0);
        }
    }

    var effHsplitPosition = Math.max(0, Math.min(this.hsplitPosition, w - this.splitSize - 20));
    var tmp = 0;

    if (this.menubar != null) {
        this.menubarContainer.style.height = this.menubarHeight + 'px';
        tmp += this.menubarHeight;
    }

    if (this.toolbar != null) {
        this.toolbarContainer.style.top = this.menubarHeight + 'px';
        this.toolbarContainer.style.height = this.toolbarHeight + 'px';
        tmp += this.toolbarHeight;
    }

    if (tmp > 0 && !mxClient.IS_QUIRKS) {
        tmp += 1;
    }

    var sidebarFooterHeight = 0;

    if (this.sidebarFooterContainer != null) {
        var bottom = this.footerHeight + off;
        sidebarFooterHeight = Math.max(0, Math.min(h - tmp - bottom, this.sidebarFooterHeight));
        this.sidebarFooterContainer.style.width = effHsplitPosition + 'px';
        this.sidebarFooterContainer.style.height = sidebarFooterHeight + 'px';
        this.sidebarFooterContainer.style.bottom = bottom + 'px';
    }

    var fw = (this.format != null) ? this.formatWidth : 0;
    this.sidebarContainer.style.top = tmp + 'px';
    this.sidebarContainer.style.width = effHsplitPosition + 'px';
    this.formatContainer.style.top = tmp + 'px';
    this.formatContainer.style.width = fw + 'px';
    this.formatContainer.style.display = (this.format != null) ? '' : 'none';

    var diagContOffset = this.getDiagramContainerOffset();
    var contLeft = (this.hsplit.parentNode != null) ? (effHsplitPosition + this.splitSize) : 0;
    this.diagramContainer.style.left = (contLeft + diagContOffset.x) + 'px';
    this.diagramContainer.style.top = (tmp + diagContOffset.y) + 'px';
    this.footerContainer.style.height = this.footerHeight + 'px';
    this.hsplit.style.top = this.sidebarContainer.style.top;
    this.hsplit.style.bottom = (this.footerHeight + off) + 'px';
    this.hsplit.style.left = effHsplitPosition + 'px';
    this.footerContainer.style.display = (this.footerHeight == 0) ? 'none' : '';

    if (this.tabContainer != null) {
        this.tabContainer.style.left = contLeft + 'px';
    }

    if (quirks) {
        this.menubarContainer.style.width = w + 'px';
        this.toolbarContainer.style.width = this.menubarContainer.style.width;
        var sidebarHeight = Math.max(0, h - this.footerHeight - this.menubarHeight - this.toolbarHeight);
        this.sidebarContainer.style.height = (sidebarHeight - sidebarFooterHeight) + 'px';
        this.formatContainer.style.height = sidebarHeight + 'px';
        this.diagramContainer.style.width = (this.hsplit.parentNode != null) ? Math.max(0, w - effHsplitPosition - this.splitSize - fw) + 'px' : w + 'px';
        this.footerContainer.style.width = this.menubarContainer.style.width;
        var diagramHeight = Math.max(0, h - this.footerHeight - this.menubarHeight - this.toolbarHeight);

        if (this.tabContainer != null) {
            this.tabContainer.style.width = this.diagramContainer.style.width;
            this.tabContainer.style.bottom = (this.footerHeight + off) + 'px';
            diagramHeight -= this.tabContainer.clientHeight;
        }

        this.diagramContainer.style.height = diagramHeight + 'px';
        this.hsplit.style.height = diagramHeight + 'px';
    } else {
        if (this.footerHeight > 0) {
            this.footerContainer.style.bottom = off + 'px';
        }

        this.diagramContainer.style.right = fw + 'px';
        var th = 0;

        if (this.tabContainer != null) {
            this.tabContainer.style.bottom = (this.footerHeight + off) + 'px';
            this.tabContainer.style.right = this.diagramContainer.style.right;
            th = this.tabContainer.clientHeight;
        }

        this.sidebarContainer.style.bottom = (this.footerHeight + sidebarFooterHeight + off) + 'px';
        this.formatContainer.style.bottom = (this.footerHeight + off) + 'px';
        this.diagramContainer.style.bottom = (this.footerHeight + off + th) + 'px';
    }

    if (sizeDidChange) {
        this.editor.graph.sizeDidChange();
    }
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createTabContainer = function () {
    return null;
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createDivs = function () {
    this.menubarContainer = this.createDiv('geMenubarContainer');
    this.toolbarContainer = this.createDiv('geToolbarContainer');
    this.sidebarContainer = this.createDiv('geSidebarContainer');
    this.formatContainer = this.createDiv('geSidebarContainer geFormatContainer');
    this.diagramContainer = this.createDiv('geDiagramContainer');
    this.footerContainer = this.createDiv('geFooterContainer');
    this.hsplit = this.createDiv('geHsplit');
    this.hsplit.setAttribute('title', mxResources.get('collapseExpand'));

    // Sets static style for containers
    this.menubarContainer.style.top = '0px';
    this.menubarContainer.style.left = '0px';
    this.menubarContainer.style.right = '0px';
    this.toolbarContainer.style.left = '0px';
    this.toolbarContainer.style.right = '0px';
    this.sidebarContainer.style.left = '0px';
    this.formatContainer.style.right = '0px';
    this.formatContainer.style.zIndex = '1';
    this.diagramContainer.style.right = ((this.format != null) ? this.formatWidth : 0) + 'px';
    this.footerContainer.style.left = '0px';
    this.footerContainer.style.right = '0px';
    this.footerContainer.style.bottom = '0px';
    this.footerContainer.style.zIndex = mxPopupMenu.prototype.zIndex - 2;
    this.hsplit.style.width = this.splitSize + 'px';
    this.sidebarFooterContainer = this.createSidebarFooterContainer();

    if (this.sidebarFooterContainer) {
        this.sidebarFooterContainer.style.left = '0px';
    }

    if (!this.editor.chromeless) {
        this.tabContainer = this.createTabContainer();
    } else {
        this.diagramContainer.style.border = 'none';
    }
};

/**
 * Hook for sidebar footer container. This implementation returns null.
 */
EditorUi.prototype.createSidebarFooterContainer = function () {
    return null;
};

/**
 * Creates the required containers.
 */
EditorUi.prototype.createUi = function () {
    // Creates menubar
    // 不创建菜单栏
    // this.menubar = (this.editor.chromeless) ? null : this.menus.createMenubar(this.createDiv('geMenubar'));

    if (this.menubar != null) {
        this.menubarContainer.appendChild(this.menubar.container);
    }

    // Adds status bar in menubar
    if (this.menubar != null) {
        this.statusContainer = this.createStatusContainer();

        // Connects the status bar to the editor status
        this.editor.addListener('statusChanged', mxUtils.bind(this, function () {
            this.setStatusText(this.editor.getStatus());
        }));

        this.setStatusText(this.editor.getStatus());
        this.menubar.container.appendChild(this.statusContainer);

        // Inserts into DOM
        this.container.appendChild(this.menubarContainer);
    }

    // Creates the sidebar
    this.sidebar = (this.editor.chromeless) ? null : this.createSidebar(this.sidebarContainer);

    if (this.sidebar != null) {
        this.container.appendChild(this.sidebarContainer);
    }

    // Creates the format sidebar
    this.format = (this.editor.chromeless || !this.formatEnabled) ? null : this.createFormat(this.formatContainer);

    if (this.format != null) {
        this.container.appendChild(this.formatContainer);
    }

    // Creates the footer
    var footer = (this.editor.chromeless) ? null : this.createFooter();

    if (footer != null) {
        this.footerContainer.appendChild(footer);
        this.container.appendChild(this.footerContainer);
    }

    if (this.sidebar != null && this.sidebarFooterContainer) {
        this.container.appendChild(this.sidebarFooterContainer);
    }

    this.container.appendChild(this.diagramContainer);

    if (this.container != null && this.tabContainer != null) {
        this.container.appendChild(this.tabContainer);
    }

    // Creates toolbar
    this.toolbar = (this.editor.chromeless) ? null : this.createToolbar(this.createDiv('geToolbar'));

    if (this.toolbar != null) {
        this.toolbarContainer.appendChild(this.toolbar.container);
        this.container.appendChild(this.toolbarContainer);
    }

    // HSplit
    if (this.sidebar != null) {
        this.container.appendChild(this.hsplit);

        this.addSplitHandler(this.hsplit, true, 0, mxUtils.bind(this, function (value) {
            this.hsplitPosition = value;
            this.refresh();
        }));
    }
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.createStatusContainer = function () {
    var container = document.createElement('a');
    container.className = 'geItem geStatus';

    if (screen.width < 420) {
        container.style.maxWidth = Math.max(20, screen.width - 320) + 'px';
        container.style.overflow = 'hidden';
    }

    return container;
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.setStatusText = function (value) {
    this.statusContainer.innerHTML = value;
};

/**
 * Creates a new toolbar for the given container.
 */
EditorUi.prototype.createToolbar = function (container) {
    return new Toolbar(this, container);
};

/**
 * Creates a new sidebar for the given container.
 */
EditorUi.prototype.createSidebar = function (container) {
    return new Sidebar(this, container);
};

/**
 * Creates a new sidebar for the given container.
 */
EditorUi.prototype.createFormat = function (container) {
    return new Format(this, container);
};

/**
 * Creates and returns a new footer.
 */
EditorUi.prototype.createFooter = function () {
    return this.createDiv('geFooter');
};

/**
 * Creates the actual toolbar for the toolbar container.
 */
EditorUi.prototype.createDiv = function (classname) {
    var elt = document.createElement('div');
    elt.className = classname;

    return elt;
};

/**
 * Updates the states of the given undo/redo items.
 */
EditorUi.prototype.addSplitHandler = function (elt, horizontal, dx, onChange) {
    var start = null;
    var initial = null;
    var ignoreClick = true;
    var last = null;

    // Disables built-in pan and zoom in IE10 and later
    if (mxClient.IS_POINTER) {
        elt.style.touchAction = 'none';
    }

    var getValue = mxUtils.bind(this, function () {
        var result = parseInt(((horizontal) ? elt.style.left : elt.style.bottom));

        // Takes into account hidden footer
        if (!horizontal) {
            result = result + dx - this.footerHeight;
        }

        return result;
    });

    function moveHandler(evt) {
        if (start != null) {
            var pt = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
            onChange(Math.max(0, initial + ((horizontal) ? (pt.x - start.x) : (start.y - pt.y)) - dx));
            mxEvent.consume(evt);

            if (initial != getValue()) {
                ignoreClick = true;
                last = null;
            }
        }
    };

    function dropHandler(evt) {
        moveHandler(evt);
        initial = null;
        start = null;
    };

    mxEvent.addGestureListeners(elt, function (evt) {
        start = new mxPoint(mxEvent.getClientX(evt), mxEvent.getClientY(evt));
        initial = getValue();
        ignoreClick = false;
        mxEvent.consume(evt);
    });

    mxEvent.addListener(elt, 'click', mxUtils.bind(this, function (evt) {
        if (!ignoreClick && this.hsplitClickEnabled) {
            var next = (last != null) ? last - dx : 0;
            last = getValue();
            onChange(next);
            mxEvent.consume(evt);
        }
    }));

    mxEvent.addGestureListeners(document, null, moveHandler, dropHandler);

    this.destroyFunctions.push(function () {
        mxEvent.removeGestureListeners(document, null, moveHandler, dropHandler);
    });
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.handleError = function (resp, title, fn, invokeFnOnClose, notFoundMessage) {
    var e = (resp != null && resp.error != null) ? resp.error : resp;

    if (e != null || title != null) {
        var msg = mxUtils.htmlEntities(mxResources.get('unknownError'));
        var btn = mxResources.get('ok');
        title = (title != null) ? title : mxResources.get('error');

        if (e != null && e.message != null) {
            msg = mxUtils.htmlEntities(e.message);
        }

        this.showError(title, msg, btn, fn, null, null, null, null, null,
            null, null, null, (invokeFnOnClose) ? fn : null);
    } else if (fn != null) {
        fn();
    }
};

/**
 * Translates this point by the given vector.
 *
 * @param {number} dx X-coordinate of the translation.
 * @param {number} dy Y-coordinate of the translation.
 */
EditorUi.prototype.showError = function (title, msg, btn, fn, retry, btn2, fn2, btn3, fn3, w, h, hide, onClose) {
    var dlg = new ErrorDialog(this, title, msg, btn || mxResources.get('ok'),
        fn, retry, btn2, fn2, hide, btn3, fn3);
    var lines = Math.ceil((msg != null) ? msg.length / 50 : 1);
    this.showDialog(dlg.container, w || 340, h || (100 + lines * 20), true, false, onClose);
    dlg.init();
};

/**
 * Displays a print dialog.
 */
EditorUi.prototype.showDialog = function (elt, w, h, modal, closable, onClose, noScroll, transparent, onResize, ignoreBgClick) {
    this.editor.graph.tooltipHandler.hideTooltip();

    if (this.dialogs == null) {
        this.dialogs = [];
    }

    this.dialog = new Dialog(this, elt, w, h, modal, closable, onClose, noScroll, transparent, onResize, ignoreBgClick);
    this.dialogs.push(this.dialog);
};

/**
 * Displays a print dialog.
 */
EditorUi.prototype.hideDialog = function (cancel, isEsc) {
    if (this.dialogs != null && this.dialogs.length > 0) {
        var dlg = this.dialogs.pop();

        if (dlg.close(cancel, isEsc) == false) {
            //add the dialog back if dialog closing is cancelled
            this.dialogs.push(dlg);
            return;
        }

        this.dialog = (this.dialogs.length > 0) ? this.dialogs[this.dialogs.length - 1] : null;
        this.editor.fireEvent(new mxEventObject('hideDialog'));

        if (this.dialog == null && this.editor.graph.container.style.visibility != 'hidden') {
            window.setTimeout(mxUtils.bind(this, function () {
                if (this.editor.graph.isEditing() && this.editor.graph.cellEditor.textarea != null) {
                    this.editor.graph.cellEditor.textarea.focus();
                } else {
                    mxUtils.clearSelection();
                    this.editor.graph.container.focus();
                }
            }), 0);
        }
    }
};

/**
 * Display a color dialog.
 */
EditorUi.prototype.pickColor = function (color, apply) {
    var graph = this.editor.graph;
    var selState = graph.cellEditor.saveSelection();
    var h = 226 + ((Math.ceil(ColorDialog.prototype.presetColors.length / 12) +
        Math.ceil(ColorDialog.prototype.defaultColors.length / 12)) * 17);

    var dlg = new ColorDialog(this, color || 'none', function (color) {
        graph.cellEditor.restoreSelection(selState);
        apply(color);
    }, function () {
        graph.cellEditor.restoreSelection(selState);
    });
    this.showDialog(dlg.container, 230, h, true, false);
    dlg.init();
};

/**
 * Adds the label menu items to the given menu and parent.
 */
EditorUi.prototype.openFile = function () {
    // Closes dialog after open
    window.openFile = new OpenFile(mxUtils.bind(this, function (cancel) {
        this.hideDialog(cancel);
    }));

    // Removes openFile if dialog is closed
    this.showDialog(new OpenDialog(this).container, (Editor.useLocalStorage) ? 640 : 320,
        (Editor.useLocalStorage) ? 480 : 220, true, true, function () {
            window.openFile = null;
        });
};

/**
 * Extracs the graph model from the given HTML data from a data transfer event.
 */
EditorUi.prototype.extractGraphModelFromHtml = function (data) {
    var result = null;

    try {
        var idx = data.indexOf('&lt;mxGraphModel ');

        if (idx >= 0) {
            var idx2 = data.lastIndexOf('&lt;/mxGraphModel&gt;');

            if (idx2 > idx) {
                result = data.substring(idx, idx2 + 21).replace(/&gt;/g, '>').replace(/&lt;/g, '<').replace(/\\&quot;/g, '"').replace(/\n/g, '');
            }
        }
    } catch (e) {
        // ignore
    }

    return result;
};

/**
 * Opens the given files in the editor.
 */
EditorUi.prototype.extractGraphModelFromEvent = function (evt) {
    var result = null;
    var data = null;

    if (evt != null) {
        var provider = (evt.dataTransfer != null) ? evt.dataTransfer : evt.clipboardData;

        if (provider != null) {
            if (document.documentMode == 10 || document.documentMode == 11) {
                data = provider.getData('Text');
            } else {
                data = (mxUtils.indexOf(provider.types, 'text/html') >= 0) ? provider.getData('text/html') : null;

                if (mxUtils.indexOf(provider.types, 'text/plain' && (data == null || data.length == 0))) {
                    data = provider.getData('text/plain');
                }
            }

            if (data != null) {
                data = Graph.zapGremlins(mxUtils.trim(data));

                // Tries parsing as HTML document with embedded XML
                var xml = this.extractGraphModelFromHtml(data);

                if (xml != null) {
                    data = xml;
                }
            }
        }
    }

    if (data != null && this.isCompatibleString(data)) {
        result = data;
    }

    return result;
};

/**
 * Hook for subclassers to return true if event data is a supported format.
 * This implementation always returns false.
 */
EditorUi.prototype.isCompatibleString = function (data) {
    return false;
};

/**
 * Adds the label menu items to the given menu and parent.
 */
EditorUi.prototype.saveFile = function (forceDialog) {
    if (!forceDialog && this.editor.filename != null) {
        this.save(this.editor.getOrCreateFilename());
    } else {
        var dlg = new FilenameDialog(this, this.editor.getOrCreateFilename(), mxResources.get('save'), mxUtils.bind(this, function (name) {
            this.save(name);
        }), null, mxUtils.bind(this, function (name) {
            if (name != null && name.length > 0) {
                return true;
            }

            mxUtils.confirm(mxResources.get('invalidName'));

            return false;
        }));
        this.showDialog(dlg.container, 300, 100, true, true);
        dlg.init();
    }
};

/**
 * Saves the current graph under the given filename.
 */
EditorUi.prototype.save = function (name) {
    if (name != null) {
        if (this.editor.graph.isEditing()) {
            this.editor.graph.stopEditing();
        }

        var xml = mxUtils.getXml(this.editor.getGraphXml());

        try {
            if (Editor.useLocalStorage) {
                if (localStorage.getItem(name) != null &&
                    !mxUtils.confirm(mxResources.get('replaceIt', [name]))) {
                    return;
                }

                localStorage.setItem(name, xml);
                this.editor.setStatus(mxUtils.htmlEntities(mxResources.get('saved')) + ' ' + new Date());
            } else {
                // new mxXmlRequest(SAVE_URL, 'filename=' + encodeURIComponent(name) +
                // 	'&xml=' + encodeURIComponent(xml)).simulate(document, '_blank');
                var graph = this.editor.graph;
                var bounds = graph.getGraphBounds();

                // New image export
                var xmlDoc = mxUtils.createXmlDocument();
                var root = xmlDoc.createElement('output');
                xmlDoc.appendChild(root);

                // Renders graph. Offset will be multiplied with state's scale when painting state.
                var xmlCanvas = new mxXmlCanvas2D(root);
                var b = 0, s = 1;
                xmlCanvas.translate(Math.floor((b / s - bounds.x) / graph.view.scale),
                    Math.floor((b / s - bounds.y) / graph.view.scale));
                xmlCanvas.scale(s / graph.view.scale);

                var imgExport = new mxImageExport()
                imgExport.drawState(graph.getView().getState(graph.model.root), xmlCanvas);

                // Puts request data together
                var param = {
                    imageXml: btoa(encodeURI(mxUtils.getXml(root)))
                }
                var w = Math.ceil(bounds.width * s / graph.view.scale + 2 * b);
                var h = Math.ceil(bounds.height * s / graph.view.scale + 2 * b);
                // Requests image if request is valid
                if (w * h < MAX_AREA) {
                    param.bg = 'none';
                    param.w = w;
                    param.h = h;
                    //   param.dpi = 100;
                }
                param.xml = btoa(encodeURI(xml));
                param.procdefId = $('#procdefId').val();
                Public.ajax(SAVE_URL, param, function (resp) {
                });
            }

            this.editor.setModified(false);
            this.editor.setFilename(name);
            this.updateDocumentTitle();
        } catch (e) {
            this.editor.setStatus(mxUtils.htmlEntities(mxResources.get('errorSavingFile')));
        }
    }
};

/**
 * Executes the given layout.
 */
EditorUi.prototype.executeLayout = function (exec, animate, post) {
    var graph = this.editor.graph;

    if (graph.isEnabled()) {
        graph.getModel().beginUpdate();
        try {
            exec();
        } catch (e) {
            throw e;
        } finally {
            // Animates the changes in the graph model except
            // for Camino, where animation is too slow
            if (this.allowAnimation && animate && navigator.userAgent.indexOf('Camino') < 0) {
                // New API for animating graph layout results asynchronously
                var morph = new mxMorphing(graph);
                morph.addListener(mxEvent.DONE, mxUtils.bind(this, function () {
                    graph.getModel().endUpdate();

                    if (post != null) {
                        post();
                    }
                }));

                morph.startAnimation();
            } else {
                graph.getModel().endUpdate();

                if (post != null) {
                    post();
                }
            }
        }
    }
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showImageDialog = function (title, value, fn, ignoreExisting) {
    var cellEditor = this.editor.graph.cellEditor;
    var selState = cellEditor.saveSelection();
    var newValue = mxUtils.prompt(title, value);
    cellEditor.restoreSelection(selState);

    if (newValue != null && newValue.length > 0) {
        var img = new Image();

        img.onload = function () {
            fn(newValue, img.width, img.height);
        };
        img.onerror = function () {
            fn(null);
            mxUtils.alert(mxResources.get('fileNotFound'));
        };

        img.src = newValue;
    } else {
        fn(null);
    }
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showLinkDialog = function (value, btnLabel, fn) {
    var dlg = new LinkDialog(this, value, btnLabel, fn);
    this.showDialog(dlg.container, 420, 90, true, true);
    dlg.init();
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showDataDialog = function (cell) {
    if (cell != null) {
        var dlg = new EditDataDialog(this, cell);
        this.showDialog(dlg.container, 480, 420, true, false, null, false);
        dlg.init();
    }
};

/**
 * Hides the current menu.
 */
EditorUi.prototype.showBackgroundImageDialog = function (apply) {
    apply = (apply != null) ? apply : mxUtils.bind(this, function (image) {
        var change = new ChangePageSetup(this, null, image);
        change.ignoreColor = true;

        this.editor.graph.model.execute(change);
    });

    var newValue = mxUtils.prompt(mxResources.get('backgroundImage'), '');

    if (newValue != null && newValue.length > 0) {
        var img = new Image();

        img.onload = function () {
            apply(new mxImage(newValue, img.width, img.height));
        };
        img.onerror = function () {
            apply(null);
            mxUtils.alert(mxResources.get('fileNotFound'));
        };

        img.src = newValue;
    } else {
        apply(null);
    }
};

/**
 * Loads the stylesheet for this graph.
 */
EditorUi.prototype.setBackgroundImage = function (image) {
    this.editor.graph.setBackgroundImage(image);
    this.editor.graph.view.validateBackgroundImage();

    this.fireEvent(new mxEventObject('backgroundImageChanged'));
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.confirm = function (msg, okFn, cancelFn) {
    if (mxUtils.confirm(msg)) {
        if (okFn != null) {
            okFn();
        }
    } else if (cancelFn != null) {
        cancelFn();
    }
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.createOutline = function (wnd) {
    var outline = new mxOutline(this.editor.graph);
    outline.border = 20;

    mxEvent.addListener(window, 'resize', function () {
        outline.update();
    });

    this.addListener('pageFormatChanged', function () {
        outline.update();
    });

    return outline;
};

// Alt+Shift+Keycode mapping to action
EditorUi.prototype.altShiftActions = {
    67: 'clearWaypoints', // Alt+Shift+C
    65: 'connectionArrows', // Alt+Shift+A
    76: 'editLink', // Alt+Shift+L
    80: 'connectionPoints', // Alt+Shift+P
    84: 'editTooltip', // Alt+Shift+T
    86: 'pasteSize', // Alt+Shift+V
    88: 'copySize' // Alt+Shift+X
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.createKeyHandler = function (editor) {
    var editorUi = this;
    var graph = this.editor.graph;
    var keyHandler = new mxKeyHandler(graph);

    var isEventIgnored = keyHandler.isEventIgnored;
    keyHandler.isEventIgnored = function (evt) {
        // Handles undo/redo/ctrl+./,/u via action and allows ctrl+b/i only if editing value is HTML (except for FF and Safari)
        return (!this.isControlDown(evt) || mxEvent.isShiftDown(evt) || (evt.keyCode != 90 && evt.keyCode != 89 &&
            evt.keyCode != 188 && evt.keyCode != 190 && evt.keyCode != 85)) && ((evt.keyCode != 66 && evt.keyCode != 73) ||
            !this.isControlDown(evt) || (this.graph.cellEditor.isContentEditing() && !mxClient.IS_FF && !mxClient.IS_SF)) &&
            isEventIgnored.apply(this, arguments);
    };

    // Ignores graph enabled state but not chromeless state
    keyHandler.isEnabledForEvent = function (evt) {
        return (!mxEvent.isConsumed(evt) && this.isGraphEvent(evt) && this.isEnabled() &&
            (editorUi.dialogs == null || editorUi.dialogs.length == 0));
    };

    // Routes command-key to control-key on Mac
    keyHandler.isControlDown = function (evt) {
        return mxEvent.isControlDown(evt) || (mxClient.IS_MAC && evt.metaKey);
    };

    var queue = [];
    var thread = null;

    // Helper function to move cells with the cursor keys
    function nudge(keyCode, stepSize, resize) {
        queue.push(function () {
            if (!graph.isSelectionEmpty() && graph.isEnabled()) {
                stepSize = (stepSize != null) ? stepSize : 1;

                if (resize) {
                    // Resizes all selected vertices
                    graph.getModel().beginUpdate();
                    try {
                        var cells = graph.getSelectionCells();

                        for (var i = 0; i < cells.length; i++) {
                            if (graph.getModel().isVertex(cells[i]) && graph.isCellResizable(cells[i])) {
                                var geo = graph.getCellGeometry(cells[i]);

                                if (geo != null) {
                                    geo = geo.clone();

                                    if (keyCode == 37) {
                                        geo.width = Math.max(0, geo.width - stepSize);
                                    } else if (keyCode == 38) {
                                        geo.height = Math.max(0, geo.height - stepSize);
                                    } else if (keyCode == 39) {
                                        geo.width += stepSize;
                                    } else if (keyCode == 40) {
                                        geo.height += stepSize;
                                    }

                                    graph.getModel().setGeometry(cells[i], geo);
                                }
                            }
                        }
                    } finally {
                        graph.getModel().endUpdate();
                    }
                } else {
                    // Moves vertices up/down in a stack layout
                    var cell = graph.getSelectionCell();
                    var parent = graph.model.getParent(cell);
                    var layout = null;

                    if (graph.getSelectionCount() == 1 && graph.model.isVertex(cell) &&
                        graph.layoutManager != null && !graph.isCellLocked(cell)) {
                        layout = graph.layoutManager.getLayout(parent);
                    }

                    if (layout != null && layout.constructor == mxStackLayout) {
                        var index = parent.getIndex(cell);

                        if (keyCode == 37 || keyCode == 38) {
                            graph.model.add(parent, cell, Math.max(0, index - 1));
                        } else if (keyCode == 39 || keyCode == 40) {
                            graph.model.add(parent, cell, Math.min(graph.model.getChildCount(parent), index + 1));
                        }
                    } else {
                        var dx = 0;
                        var dy = 0;

                        if (keyCode == 37) {
                            dx = -stepSize;
                        } else if (keyCode == 38) {
                            dy = -stepSize;
                        } else if (keyCode == 39) {
                            dx = stepSize;
                        } else if (keyCode == 40) {
                            dy = stepSize;
                        }

                        graph.moveCells(graph.getMovableCells(graph.getSelectionCells()), dx, dy);
                    }
                }
            }
        });

        if (thread != null) {
            window.clearTimeout(thread);
        }

        thread = window.setTimeout(function () {
            if (queue.length > 0) {
                graph.getModel().beginUpdate();
                try {
                    for (var i = 0; i < queue.length; i++) {
                        queue[i]();
                    }

                    queue = [];
                } finally {
                    graph.getModel().endUpdate();
                }
                graph.scrollCellToVisible(graph.getSelectionCell());
            }
        }, 200);
    };

    // Overridden to handle special alt+shift+cursor keyboard shortcuts
    var directions = {
        37: mxConstants.DIRECTION_WEST, 38: mxConstants.DIRECTION_NORTH,
        39: mxConstants.DIRECTION_EAST, 40: mxConstants.DIRECTION_SOUTH
    };

    var keyHandlerGetFunction = keyHandler.getFunction;

    mxKeyHandler.prototype.getFunction = function (evt) {
        if (graph.isEnabled()) {
            // TODO: Add alt modified state in core API, here are some specific cases
            if (mxEvent.isShiftDown(evt) && mxEvent.isAltDown(evt)) {
                var action = editorUi.actions.get(editorUi.altShiftActions[evt.keyCode]);

                if (action != null) {
                    return action.funct;
                }
            }

            if (evt.keyCode == 9 && mxEvent.isAltDown(evt)) {
                if (mxEvent.isShiftDown(evt)) {
                    // Alt+Shift+Tab
                    return function () {
                        graph.selectParentCell();
                    };
                } else {
                    // Alt+Tab
                    return function () {
                        graph.selectChildCell();
                    };
                }
            } else if (directions[evt.keyCode] != null && !graph.isSelectionEmpty()) {
                // On macOS, Control+Cursor is used by Expose so allow for Alt+Control to resize
                if (!this.isControlDown(evt) && mxEvent.isShiftDown(evt) && mxEvent.isAltDown(evt)) {
                    if (graph.model.isVertex(graph.getSelectionCell())) {
                        return function () {
                            var cells = graph.connectVertex(graph.getSelectionCell(), directions[evt.keyCode],
                                graph.defaultEdgeLength, evt, true);

                            if (cells != null && cells.length > 0) {
                                if (cells.length == 1 && graph.model.isEdge(cells[0])) {
                                    graph.setSelectionCell(graph.model.getTerminal(cells[0], false));
                                } else {
                                    graph.setSelectionCell(cells[cells.length - 1]);
                                }

                                graph.scrollCellToVisible(graph.getSelectionCell());

                                if (editorUi.hoverIcons != null) {
                                    editorUi.hoverIcons.update(graph.view.getState(graph.getSelectionCell()));
                                }
                            }
                        };
                    }
                } else {
                    // Avoids consuming event if no vertex is selected by returning null below
                    // Cursor keys move and resize (ctrl) cells
                    if (this.isControlDown(evt)) {
                        return function () {
                            nudge(evt.keyCode, (mxEvent.isShiftDown(evt)) ? graph.gridSize : null, true);
                        };
                    } else {
                        return function () {
                            nudge(evt.keyCode, (mxEvent.isShiftDown(evt)) ? graph.gridSize : null);
                        };
                    }
                }
            }
        }

        return keyHandlerGetFunction.apply(this, arguments);
    };

    // Binds keystrokes to actions
    keyHandler.bindAction = mxUtils.bind(this, function (code, control, key, shift) {
        var action = this.actions.get(key);

        if (action != null) {
            var f = function () {
                if (action.isEnabled()) {
                    action.funct();
                }
            };

            if (control) {
                if (shift) {
                    keyHandler.bindControlShiftKey(code, f);
                } else {
                    keyHandler.bindControlKey(code, f);
                }
            } else {
                if (shift) {
                    keyHandler.bindShiftKey(code, f);
                } else {
                    keyHandler.bindKey(code, f);
                }
            }
        }
    });

    var ui = this;
    var keyHandlerEscape = keyHandler.escape;
    keyHandler.escape = function (evt) {
        keyHandlerEscape.apply(this, arguments);
    };

    // Ignores enter keystroke. Remove this line if you want the
    // enter keystroke to stop editing. N, W, T are reserved.
    keyHandler.enter = function () {
    };

    keyHandler.bindControlShiftKey(36, function () {
        graph.exitGroup();
    }); // Ctrl+Shift+Home
    keyHandler.bindControlShiftKey(35, function () {
        graph.enterGroup();
    }); // Ctrl+Shift+End
    keyHandler.bindKey(36, function () {
        graph.home();
    }); // Home
    keyHandler.bindKey(35, function () {
        graph.refresh();
    }); // End
    keyHandler.bindAction(107, true, 'zoomIn'); // Ctrl+Plus
    keyHandler.bindAction(109, true, 'zoomOut'); // Ctrl+Minus
    keyHandler.bindAction(80, true, 'print'); // Ctrl+P
    keyHandler.bindAction(79, true, 'outline', true); // Ctrl+Shift+O
    keyHandler.bindAction(112, false, 'about'); // F1

    if (!this.editor.chromeless || this.editor.editable) {
        keyHandler.bindControlKey(36, function () {
            if (graph.isEnabled()) {
                graph.foldCells(true);
            }
        }); // Ctrl+Home
        keyHandler.bindControlKey(35, function () {
            if (graph.isEnabled()) {
                graph.foldCells(false);
            }
        }); // Ctrl+End
        keyHandler.bindControlKey(13, function () {
            if (graph.isEnabled()) {
                graph.setSelectionCells(graph.duplicateCells(graph.getSelectionCells(), false));
            }
        }); // Ctrl+Enter
        keyHandler.bindAction(8, false, 'delete'); // Backspace
        keyHandler.bindAction(8, true, 'deleteAll'); // Backspace
        keyHandler.bindAction(46, false, 'delete'); // Delete
        keyHandler.bindAction(46, true, 'deleteAll'); // Ctrl+Delete
        keyHandler.bindAction(72, true, 'resetView'); // Ctrl+H
        keyHandler.bindAction(72, true, 'fitWindow', true); // Ctrl+Shift+H
        keyHandler.bindAction(74, true, 'fitPage'); // Ctrl+J
        keyHandler.bindAction(74, true, 'fitTwoPages', true); // Ctrl+Shift+J
        keyHandler.bindAction(48, true, 'customZoom'); // Ctrl+0
        keyHandler.bindAction(82, true, 'turn'); // Ctrl+R
        keyHandler.bindAction(82, true, 'clearDefaultStyle', true); // Ctrl+Shift+R
        keyHandler.bindAction(83, true, 'save'); // Ctrl+S
        keyHandler.bindAction(83, true, 'saveAs', true); // Ctrl+Shift+S
        keyHandler.bindAction(65, true, 'selectAll'); // Ctrl+A
        keyHandler.bindAction(65, true, 'selectNone', true); // Ctrl+A
        keyHandler.bindAction(73, true, 'selectVertices', true); // Ctrl+Shift+I
        keyHandler.bindAction(69, true, 'selectEdges', true); // Ctrl+Shift+E
        keyHandler.bindAction(69, true, 'editStyle'); // Ctrl+E
        keyHandler.bindAction(66, true, 'bold'); // Ctrl+B
        keyHandler.bindAction(66, true, 'toBack', true); // Ctrl+Shift+B
        keyHandler.bindAction(70, true, 'toFront', true); // Ctrl+Shift+F
        keyHandler.bindAction(68, true, 'duplicate'); // Ctrl+D
        keyHandler.bindAction(68, true, 'setAsDefaultStyle', true); // Ctrl+Shift+D
        keyHandler.bindAction(90, true, 'undo'); // Ctrl+Z
        keyHandler.bindAction(89, true, 'autosize', true); // Ctrl+Shift+Y
        keyHandler.bindAction(88, true, 'cut'); // Ctrl+X
        keyHandler.bindAction(67, true, 'copy'); // Ctrl+C
        keyHandler.bindAction(86, true, 'paste'); // Ctrl+V
        keyHandler.bindAction(71, true, 'group'); // Ctrl+G
        //    keyHandler.bindAction(77, true, 'editData'); // Ctrl+M
        keyHandler.bindAction(71, true, 'grid', true); // Ctrl+Shift+G
        keyHandler.bindAction(73, true, 'italic'); // Ctrl+I
        keyHandler.bindAction(76, true, 'lockUnlock'); // Ctrl+L
        keyHandler.bindAction(76, true, 'layers', true); // Ctrl+Shift+L
        keyHandler.bindAction(80, true, 'formatPanel', true); // Ctrl+Shift+P
        keyHandler.bindAction(85, true, 'underline'); // Ctrl+U
        keyHandler.bindAction(85, true, 'ungroup', true); // Ctrl+Shift+U
        keyHandler.bindAction(190, true, 'superscript'); // Ctrl+.
        keyHandler.bindAction(188, true, 'subscript'); // Ctrl+,
        keyHandler.bindKey(13, function () {
            if (graph.isEnabled()) {
                graph.startEditingAtCell();
            }
        }); // Enter
        keyHandler.bindKey(113, function () {
            if (graph.isEnabled()) {
                graph.startEditingAtCell();
            }
        }); // F2
    }

    if (!mxClient.IS_WIN) {
        keyHandler.bindAction(90, true, 'redo', true); // Ctrl+Shift+Z
    } else {
        keyHandler.bindAction(89, true, 'redo'); // Ctrl+Y
    }

    return keyHandler;
};

/**
 * Creates the keyboard event handler for the current graph and history.
 */
EditorUi.prototype.destroy = function () {
    if (this.editor != null) {
        this.editor.destroy();
        this.editor = null;
    }

    if (this.menubar != null) {
        this.menubar.destroy();
        this.menubar = null;
    }

    if (this.toolbar != null) {
        this.toolbar.destroy();
        this.toolbar = null;
    }

    if (this.sidebar != null) {
        this.sidebar.destroy();
        this.sidebar = null;
    }

    if (this.keyHandler != null) {
        this.keyHandler.destroy();
        this.keyHandler = null;
    }

    if (this.keydownHandler != null) {
        mxEvent.removeListener(document, 'keydown', this.keydownHandler);
        this.keydownHandler = null;
    }

    if (this.keyupHandler != null) {
        mxEvent.removeListener(document, 'keyup', this.keyupHandler);
        this.keyupHandler = null;
    }

    if (this.resizeHandler != null) {
        mxEvent.removeListener(window, 'resize', this.resizeHandler);
        this.resizeHandler = null;
    }

    if (this.gestureHandler != null) {
        mxEvent.removeGestureListeners(document, this.gestureHandler);
        this.gestureHandler = null;
    }

    if (this.orientationChangeHandler != null) {
        mxEvent.removeListener(window, 'orientationchange', this.orientationChangeHandler);
        this.orientationChangeHandler = null;
    }

    if (this.scrollHandler != null) {
        mxEvent.removeListener(window, 'scroll', this.scrollHandler);
        this.scrollHandler = null;
    }

    if (this.destroyFunctions != null) {
        for (var i = 0; i < this.destroyFunctions.length; i++) {
            this.destroyFunctions[i]();
        }

        this.destroyFunctions = null;
    }

    var c = [this.menubarContainer, this.toolbarContainer, this.sidebarContainer,
        this.formatContainer, this.diagramContainer, this.footerContainer,
        this.chromelessToolbar, this.hsplit, this.sidebarFooterContainer,
        this.layersDialog];

    for (var i = 0; i < c.length; i++) {
        if (c[i] != null && c[i].parentNode != null) {
            c[i].parentNode.removeChild(c[i]);
        }
    }
};
