drawio/war/js/diagramly/Pages.js

/**
 * Copyright (c) 2006-2016, JGraph Ltd
 * Copyright (c) 2006-2016, Gaudenz Alder
 */
/**
 * Constructs a new point for the optional x and y coordinates. If no
 * coordinates are given, then the default values for <x> and <y> are used.
 * @constructor
 * @class Implements a basic 2D point. Known subclassers = {@link mxRectangle}.
 * @param {number} x X-coordinate of the point.
 * @param {number} y Y-coordinate of the point.
 */
/**
 * Global types
 */
function DiagramPage(node)
{
	this.node = node;
	
	// Create GUID for page (first part is workaround for old versions of IE)
	if ((this.node.hasAttribute == null && this.node.getAttribute('id') == null) ||
		(this.node.hasAttribute != null && !this.node.hasAttribute('id')))
	{
		// Make global if used anywhere else
		function guid()
		{
		  function s4()
		  {
		    return Math.floor((1 + Math.random()) * 0x10000)
		      .toString(16)
		      .substring(1);
		  }
		  
		  return s4() + s4() + '-' + s4() + '-' + s4() + '-' +
		    s4() + '-' + s4() + s4() + s4();
		};
		
		this.node.setAttribute('id', guid());
	}
}

/**
 * Holds the diagram node for the page.
 */
DiagramPage.prototype.node = null;

/**
 * Holds the root cell for the page.
 */
DiagramPage.prototype.root = null;

/**
 * Holds the view state for the page.
 */
DiagramPage.prototype.viewState = null;

/**
 * 
 */
DiagramPage.prototype.getId = function()
{
	return this.node.getAttribute('id');
};

/**
 * 
 */
DiagramPage.prototype.getName = function()
{
	return this.node.getAttribute('name');
};

/**
 * 
 */
DiagramPage.prototype.setName = function(value)
{
	if (value == null)
	{
		this.node.removeAttribute('name');
	}
	else
	{
		this.node.setAttribute('name', value);
	}
};

/**
 * Change types
 */
function RenamePage(ui, page, name)
{
	this.ui = ui;
	this.page = page;
	this.previous = name;
}

/**
 * Implementation of the undoable page rename.
 */
RenamePage.prototype.execute = function()
{
	var tmp = this.page.getName();
	this.page.setName(this.previous);
	this.previous = tmp;

	// Required to update page name in placeholders
	this.ui.editor.graph.updatePlaceholders();
	this.ui.editor.fireEvent(new mxEventObject('pageRenamed'));
};

/**
 * Undoable change of page title.
 */
function MovePage(ui, oldIndex, newIndex)
{
	this.ui = ui;
	this.oldIndex = oldIndex;
	this.newIndex = newIndex;
}

/**
 * Implementation of the undoable page rename.
 */
MovePage.prototype.execute = function()
{
	this.ui.pages.splice(this.newIndex, 0, this.ui.pages.splice(this.oldIndex, 1)[0]);
	var tmp = this.oldIndex;
	this.oldIndex = this.newIndex;
	this.newIndex = tmp;
	
	// Required to update page numbers in placeholders
	this.ui.editor.graph.updatePlaceholders();
	this.ui.editor.fireEvent(new mxEventObject('pageMoved'));
};

/**
 * Class: mxCurrentRootChange
 *
 * Action to change the current root in a view.
 *
 * Constructor: mxCurrentRootChange
 *
 * Constructs a change of the current root in the given view.
 */
function SelectPage(ui, page)
{
	this.ui = ui;
	this.page = page;
	this.previousPage = page;
	this.neverShown = true;
	
	if (page != null)
	{
		this.neverShown = page.viewState == null;
		this.ui.updatePageRoot(page);
	}
};

/**
 * Executes selection of a new page.
 */
SelectPage.prototype.execute = function()
{
	var prevIndex = mxUtils.indexOf(this.ui.pages, this.previousPage);
	
	if (this.page != null && prevIndex >= 0)
	{
		var page = this.ui.currentPage;
		var editor = this.ui.editor;
		var graph = editor.graph;
		
		// Stores current diagram state in the page
		var data = editor.graph.compress(graph.zapGremlins(mxUtils.getXml(editor.getGraphXml(true))));
		mxUtils.setTextContent(page.node, data);
		page.viewState = graph.getViewState();
		page.root = graph.model.root;
		
		// Transitions for switching pages
//		var curIndex = mxUtils.indexOf(this.ui.pages, page);
//		mxUtils.setPrefixedStyle(graph.view.canvas.style, 'transition', null);
//		mxUtils.setPrefixedStyle(graph.view.canvas.style, 'transform',
//			(curIndex > prevIndex) ? 'translate(-50%,0)' : 'translate(50%,0)');
		
		// Removes the previous cells and clears selection
		graph.view.clear(page.root, true);
		graph.clearSelection();
			
		// Switches the current page
		this.ui.currentPage = this.previousPage;
		this.previousPage = page;
		page = this.ui.currentPage;
	
		// Switches the root cell and sets the view state
		graph.model.rootChanged(page.root);
		graph.setViewState(page.viewState);
				
		// Fires event to setting view state from realtime
		editor.fireEvent(new mxEventObject('setViewState', 'change', this));
		
		// Handles grid state in chromeless mode which is stored in Editor instance
		graph.gridEnabled = graph.gridEnabled && (!this.ui.editor.chromeless ||
			urlParams['grid'] == '1');

		// Updates the display
		editor.updateGraphComponents();
		graph.view.validate();
		graph.sizeDidChange();
		
//		mxUtils.setPrefixedStyle(graph.view.canvas.style, 'transition', 'transform 0.2s');
//		mxUtils.setPrefixedStyle(graph.view.canvas.style, 'transform', 'translate(0,0)');
		
		if (this.neverShown)
		{
			this.neverShown = false;
			graph.selectUnlockedLayer();
		}
		
		// Fires events
		editor.graph.fireEvent(new mxEventObject(mxEvent.ROOT));
		editor.fireEvent(new mxEventObject('pageSelected', 'change', this));
	}
};

/**
 * 
 */
function ChangePage(ui, page, select, index)
{
	SelectPage.call(this, ui, select);
	this.relatedPage = page;
	this.index = index;
	this.previousIndex = null;
};

mxUtils.extend(ChangePage, SelectPage);

/**
 * Function: execute
 *
 * Changes the current root of the view.
 */
ChangePage.prototype.execute = function()
{
	// Fires event to setting view state from realtime
	this.ui.editor.fireEvent(new mxEventObject('beforePageChange', 'change', this));
	this.previousIndex = this.index;
	
	if (this.index == null)
	{
		var tmp = mxUtils.indexOf(this.ui.pages, this.relatedPage);
		this.ui.pages.splice(tmp, 1);
		this.index = tmp;
	}
	else
	{
		this.ui.pages.splice(this.index, 0, this.relatedPage);
		this.index = null;
	}

	SelectPage.prototype.execute.apply(this, arguments);
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.getPageById = function(id)
{
	if (this.pages != null)
	{
		for (var i = 0; i < this.pages.length; i++)
		{
			if (this.pages[i].getId() == id)
			{
				return this.pages[i];
			}
		}
	}
	
	return null;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.initPages = function()
{
	this.actions.addAction('previousPage', mxUtils.bind(this, function()
	{
		this.selectNextPage(false);
	}));
	
	this.actions.addAction('nextPage', mxUtils.bind(this, function()
	{
		this.selectNextPage(true);
	}));
	
	this.keyHandler.bindAction(33, true, 'previousPage', true); // Ctrl+Shift+PageUp
	this.keyHandler.bindAction(34, true, 'nextPage', true); // Ctrl+Shift+PageDown
	
	// Updates the tabs after loading the diagram
	var graph = this.editor.graph;
	var graphViewValidateBackground = graph.view.validateBackground; 
	
	graph.view.validateBackground = mxUtils.bind(this, function()
	{
		if (this.tabContainer != null)
		{
			var prevHeight = this.tabContainer.style.height;
			
			if (this.fileNode == null || this.pages == null ||
				(this.pages.length == 1 && urlParams['pages'] == '0'))
			{
				this.tabContainer.style.height = '0px';
			}
			else
			{
				this.tabContainer.style.height = '30px';
			}
			
			if (prevHeight != this.tabContainer.style.height)
			{
				this.refresh(false);
			}
		}
		
		graphViewValidateBackground.apply(graph.view, arguments);
	});

	// Math workaround is only needed for initial rendering
	var ignorePendingMath = false;
	var lastPage = null;
	
	var updateTabs = mxUtils.bind(this, function()
	{
		this.updateTabContainer();
		
		// Updates scrollbar positions and backgrounds after validation	
		var p = this.currentPage;
		
		if (p != null && p != lastPage)
		{
			if (p.viewState == null || p.viewState.scrollLeft == null)
			{
				this.resetScrollbars();

				if (graph.lightbox)
				{
					this.lightboxFit();
				}
				
				if (this.chromelessResize != null)
				{
					graph.container.scrollLeft = 0;
					graph.container.scrollTop = 0;
					this.chromelessResize();
				}
			}
			else
			{
				graph.container.scrollLeft = graph.view.translate.x * graph.view.scale + p.viewState.scrollLeft;
				graph.container.scrollTop = graph.view.translate.y * graph.view.scale + p.viewState.scrollTop;
			}
			
			lastPage = p;
		}
		
		// Updates layers window
		if (this.actions.layersWindow != null)
		{
			this.actions.layersWindow.refreshLayers();
		}
		
		// Workaround for math if tab is switched before typesetting has stopped
		if (typeof(MathJax) !== 'undefined' && typeof(MathJax.Hub) !== 'undefined')
		{
			// Pending math should not be rendered if the graph has no math enabled
			if (!ignorePendingMath)
			{
				if (MathJax.Hub.queue.pending == 1 && !this.editor.graph.mathEnabled)
				{
					// Since there is no way to stop/undo mathjax or
					// clear the queue, we do a refresh after typeset
					MathJax.Hub.Queue(mxUtils.bind(this, function()
					{
						this.editor.graph.refresh();
					}));
				}
				
				MathJax.Hub.Queue(mxUtils.bind(this, function()
				{
					ignorePendingMath = true;
				}));
			}
		}
		else if (typeof(Editor.MathJaxClear) !== 'undefined' && !this.editor.graph.mathEnabled)
		{
			// Clears our own queue for async loading
			ignorePendingMath = true;
			Editor.MathJaxClear();
		}
	});
	
	// Adds a graph model listener to update the view
	this.editor.graph.model.addListener(mxEvent.CHANGE, mxUtils.bind(this, function(sender, evt)
	{
		var edit = evt.getProperty('edit');
		var changes = edit.changes;
		
		for (var i = 0; i < changes.length; i++)
		{
			if (changes[i] instanceof SelectPage ||
				changes[i] instanceof RenamePage ||
				changes[i] instanceof MovePage ||
				changes[i] instanceof mxRootChange)
			{
				updateTabs();
				break;	
			}
		}
	}));
	
	// Updates zoom in toolbar
	if (this.toolbar != null)
	{
		this.editor.addListener('pageSelected', this.toolbar.updateZoom);
	}
};

/**
 * Overrides setDefaultParent
 */
Graph.prototype.createViewState = function(node)
{
	var pv = node.getAttribute('page');
	var ps = node.getAttribute('pageScale');
	var pw = node.getAttribute('pageWidth');
	var ph = node.getAttribute('pageHeight');
	var bg = node.getAttribute('background');
	var temp = node.getAttribute('backgroundImage');
	var bgImg = (temp != null && temp.length > 0) ? JSON.parse(temp) : null;
	
	return {
		gridEnabled: node.getAttribute('grid') != '0',
		//gridColor: node.getAttribute('gridColor') || mxSettings.getGridColor(),
		gridSize: parseFloat(node.getAttribute('gridSize')) || mxGraph.prototype.gridSize,
		guidesEnabled: node.getAttribute('guides') != '0',
		foldingEnabled: node.getAttribute('fold') != '0',
		shadowVisible: node.getAttribute('shadow') == '1',
		pageVisible: (this.lightbox) ? false : ((pv != null) ? (pv != '0') : this.defaultPageVisible),
		background: (bg != null && bg.length > 0) ? bg : this.defaultGraphBackground,
		backgroundImage: (bgImg != null) ? new mxImage(bgImg.src, bgImg.width, bgImg.height) : null,
		pageScale: (ps != null) ? ps : mxGraph.prototype.pageScale,
		pageFormat: (pw != null && ph != null) ?  new mxRectangle(0, 0,
				parseFloat(pw), parseFloat(ph)) : this.pageFormat,
		tooltips: node.getAttribute('tooltips') != '0',
		connect: node.getAttribute('connect') != '0',
		arrows: node.getAttribute('arrows') != '0',
		mathEnabled: node.getAttribute('math') != '0',
		selectionCells: null,
		defaultParent: null,
		scrollbars: this.defaultScrollbars,
		scale: 1
	};
};

/**
 * Overrides setDefaultParent
 */
Graph.prototype.getViewState = function()
{
	return {
		defaultParent: this.defaultParent,
		currentRoot: this.view.currentRoot,
		gridEnabled: this.gridEnabled,
		//gridColor: this.view.gridColor,
		gridSize: this.gridSize,
		guidesEnabled: this.graphHandler.guidesEnabled,
		foldingEnabled: this.foldingEnabled,
		shadowVisible: this.shadowVisible,
		scrollbars: this.scrollbars,
		pageVisible: this.pageVisible,
		background: this.background,
		backgroundImage: this.backgroundImage,
		pageScale: this.pageScale,
		pageFormat: this.pageFormat,
		tooltips: this.tooltipHandler.isEnabled(),
		connect: this.connectionHandler.isEnabled(),
		arrows: this.connectionArrowsEnabled,
		scale: this.view.scale,
		scrollLeft: this.container.scrollLeft - this.view.translate.x * this.view.scale,
		scrollTop: this.container.scrollTop - this.view.translate.y * this.view.scale,
		translate: this.view.translate.clone(),
		lastPasteXml: this.lastPasteXml,
		pasteCounter: this.pasteCounter,
		mathEnabled: this.mathEnabled
	};
};

/**
 * Overrides setDefaultParent
 */
Graph.prototype.setViewState = function(state)
{
	if (state != null)
	{
		this.lastPasteXml = state.lastPasteXml;
		this.pasteCounter = state.pasteCounter || 0;
		this.mathEnabled = state.mathEnabled;
		this.gridEnabled = state.gridEnabled;
		//this.view.gridColor = state.gridColor;
		this.gridSize = state.gridSize;
		this.graphHandler.guidesEnabled = state.guidesEnabled;
		this.foldingEnabled = state.foldingEnabled;
		this.setShadowVisible(state.shadowVisible, false);
		this.scrollbars = state.scrollbars;
		this.pageVisible = state.pageVisible;
		this.background = state.background;
		this.backgroundImage = state.backgroundImage;
		this.pageScale = state.pageScale;
		this.pageFormat = state.pageFormat;
		this.view.scale = state.scale;
		this.view.currentRoot = state.currentRoot;
		this.defaultParent = state.defaultParent;
		this.connectionArrowsEnabled = state.arrows;
		this.setTooltips(state.tooltips);
		this.setConnectable(state.connect);
		
		// Checks if current root or default parent have been removed
		if (!this.model.contains(this.view.currentRoot))
		{
			this.view.currentRoot = null;
		}
		
		if (!this.model.contains(this.defaultParent))
		{
			this.setDefaultParent(null);
			this.selectUnlockedLayer();
		}
		
		if (state.translate != null)
		{
			this.view.translate = state.translate;
		}
	}
	else
	{
		this.view.currentRoot = null;
		this.view.scale = 1;
		this.gridEnabled = true;
		this.gridSize = mxGraph.prototype.gridSize;
		this.pageScale = mxGraph.prototype.pageScale;
		this.pageFormat = mxSettings.getPageFormat();
		this.pageVisible = this.defaultPageVisible;
		this.background = this.defaultGraphBackground;
		this.backgroundImage = null;
		this.scrollbars = this.defaultScrollbars;
		this.graphHandler.guidesEnabled = true;
		this.foldingEnabled = true;
		this.defaultParent = null;
		this.setTooltips(true);
		this.setConnectable(true);
		this.lastPasteXml = null;
		this.pasteCounter = 0;
		this.mathEnabled = false;
		this.connectionArrowsEnabled = true;
	}
	
	// Implicit settings
	this.pageBreaksVisible = this.pageVisible; 
	this.preferPageSize = this.pageVisible;
};

/**
 * Executes selection of a new page.
 */
EditorUi.prototype.updatePageRoot = function(page)
{
	if (page.root == null)
	{
		var node = this.editor.extractGraphModel(page.node);
		
		if (node != null)
		{
			page.graphModelNode = node;
			
			// Converts model XML into page object with root cell
			page.viewState = this.editor.graph.createViewState(node);
			var codec = new mxCodec(node.ownerDocument);
			page.root = codec.decode(node).root;
		}
		else
		{
			// Initializes page object with new empty root
			page.root = this.editor.graph.model.createRoot();
		}
	}
	
	return page;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.selectPage = function(page, quiet)
{
	quiet = (quiet != null) ? quiet : false;
	this.editor.graph.isMouseDown = false;
	this.editor.graph.reset();
	
	var edit = this.editor.graph.model.createUndoableEdit();
	
	// Special flag to bypass autosave for this edit
	edit.ignoreEdit = true;
	
	var change = new SelectPage(this, page);
	change.execute();
	edit.add(change);
	edit.notify();
	
	if (!quiet)
	{
		this.editor.graph.model.fireEvent(new mxEventObject(mxEvent.UNDO, 'edit', edit));
	}
};

/**
 * 
 */
EditorUi.prototype.selectNextPage = function(forward)
{
	var next = this.currentPage;
	
	if (next != null && this.pages != null)
	{
		var tmp = mxUtils.indexOf(this.pages, next);
		
		if (forward)
		{
			this.selectPage(this.pages[mxUtils.mod(tmp + 1, this.pages.length)]);
		}
		else if (!forward)
		{
			this.selectPage(this.pages[mxUtils.mod(tmp - 1, this.pages.length)]);
		}
	}
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.insertPage = function(page, index)
{
	if (this.editor.graph.isEnabled())
	{
		page = (page != null) ? page : this.createPage();
		index = (index != null) ? index : this.pages.length;
		
		// Uses model to fire event and trigger autosave
		var change = new ChangePage(this, page, page, index);
		this.editor.graph.model.execute(change);
	}
	
	return page;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createPage = function(name)
{
	var page = new DiagramPage(this.fileNode.ownerDocument.createElement('diagram'));
	page.setName((name != null) ? name : this.createPageName());
	
	return page;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createPageName = function()
{
	// Creates a lookup with names
	var existing = {};
	
	for (var i = 0; i < this.pages.length; i++)
	{
		var tmp = this.pages[i].getName();
		
		if (tmp != null && tmp.length > 0)
		{
			existing[tmp] = tmp;
		}
	}

	// Avoids existing names
	var nr = this.pages.length;
	var name = null;
	
	do
	{
		name = mxResources.get('pageWithNumber', [++nr]);
	}
	while (existing[name] != null);
	
	return name;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.removePage = function(page)
{
	var graph = this.editor.graph;
	
	if (graph.isEnabled())
	{
		graph.model.beginUpdate();
		try
		{
			var next = this.currentPage;
			
			if (next == page)
			{
				if (this.pages.length > 1)
				{
					var tmp = mxUtils.indexOf(this.pages, page);
					
					if (tmp == this.pages.length - 1)
					{
						tmp--;
					}
					else
					{
						tmp++;
					}
					
					next = this.pages[tmp];
				}
				else
				{
					// Removes label with incorrect page number to force
					// default page name which is OK for a single page
					next = this.insertPage();
					graph.model.execute(new RenamePage(this, next, mxResources.get('pageWithNumber', [1])));
				}
			}
			
			// Uses model to fire event to trigger autosave
			graph.model.execute(new ChangePage(this, page, next));
		}
		finally
		{
			graph.model.endUpdate();
		}
	}
	
	return page;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.duplicatePage = function(page, name)
{
	var graph = this.editor.graph;
	var newPage = null;
	
	if (graph.isEnabled())
	{
		if (graph.isEditing())
		{
			graph.stopEditing();
		}
		
		// Clones the current page and takes a snapshot of the graph model and view state
		var node = page.node.cloneNode(false);
		node.removeAttribute('id');
		
		var newPage = new DiagramPage(node);
		newPage.root = graph.cloneCells([graph.model.root])[0];
		newPage.viewState = graph.getViewState();
		
		// Resets zoom and scrollbar positions
		newPage.viewState.scale = 1;
		newPage.viewState.scrollLeft = null;
		newPage.viewState.scrollRight = null;
		newPage.setName(name);
		
		newPage = this.insertPage(newPage, mxUtils.indexOf(this.pages, page) + 1);
	}
	
	return newPage;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.renamePage = function(page)
{
	var graph = this.editor.graph;

	if (graph.isEnabled())
	{
		var dlg = new FilenameDialog(this, page.getName(), mxResources.get('rename'), mxUtils.bind(this, function(name)
		{
			if (name != null && name.length > 0)
			{
				this.editor.graph.model.execute(new RenamePage(this, page, name));
			}
		}), mxResources.get('rename'));
		this.showDialog(dlg.container, 300, 80, true, true);
		dlg.init();
	}
	
	return page;
}

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.movePage = function(oldIndex, newIndex)
{
	this.editor.graph.model.execute(new MovePage(this, oldIndex, newIndex));
}

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createTabContainer = function()
{
	var div = document.createElement('div');
	div.style.backgroundColor = '#dcdcdc';
	div.style.position = 'absolute';
	div.style.whiteSpace = 'nowrap';
	div.style.overflow = 'hidden';
	div.style.height = '0px';
	
	return div;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.updateTabContainer = function()
{
	if (this.tabContainer != null && this.pages != null)
	{
		var graph = this.editor.graph;
		var wrapper = document.createElement('div');
		wrapper.style.position = 'relative';
		wrapper.style.display = (mxClient.IS_QUIRKS) ? 'inline' : 'inline-block';
		wrapper.style.verticalAlign = 'top';
		wrapper.style.height = this.tabContainer.style.height;
		wrapper.style.whiteSpace = 'nowrap';
		wrapper.style.overflow = 'hidden';
		wrapper.style.fontSize = '12px';
		
		// Allows for negative left margin of first tab
		wrapper.style.marginLeft = '30px';
		
		// Automatic tab width to match available width
		// TODO: Fix tabWidth in chromeless mode
		var btnWidth = (this.editor.chromeless) ? 29 : 59;
		var tabWidth = Math.min(140, Math.max(20, (this.tabContainer.clientWidth - btnWidth) / this.pages.length) + 1);
		var startIndex = null;

		for (var i = 0; i < this.pages.length; i++)
		{
			// Install drag and drop for page reorder
			(mxUtils.bind(this, function(index, tab)
			{
				if (this.pages[index] == this.currentPage)
				{
					tab.style.backgroundColor = '#eeeeee';
					tab.style.fontWeight = 'bold';
					tab.style.borderTopStyle = 'none';
				}
				
				tab.setAttribute('draggable', 'true');
				
				mxEvent.addListener(tab, 'dragstart', mxUtils.bind(this, function(evt)
				{
					if (graph.isEnabled())
					{
						// Workaround for no DnD on DIV in FF
						if (mxClient.IS_FF)
						{
							// LATER: Check what triggers a parse as XML on this in FF after drop
							evt.dataTransfer.setData('Text', '<diagram/>');
						}
						
						startIndex = index;
					}
					else
					{
						// Blocks event
						mxEvent.consume(evt);
					}
				}));
				
				mxEvent.addListener(tab, 'dragend', mxUtils.bind(this, function(evt)
				{
					startIndex = null;
					evt.stopPropagation();
					evt.preventDefault();
				}));
				
				mxEvent.addListener(tab, 'dragover', mxUtils.bind(this, function(evt)
				{
					if (startIndex != null)
					{
						evt.dataTransfer.dropEffect = 'move';
					}
					
					evt.stopPropagation();
					evt.preventDefault();
				}));
				
				mxEvent.addListener(tab, 'drop', mxUtils.bind(this, function(evt)
				{
					if (startIndex != null && index != startIndex)
					{
						// TODO: Shift drag for insert/merge?
						this.movePage(startIndex, index);
					}

					evt.stopPropagation();
					evt.preventDefault();
				}));
				
				wrapper.appendChild(tab);
			}))(i, this.createTabForPage(this.pages[i], tabWidth, this.pages[i] != this.currentPage));
		}
		
		this.tabContainer.innerHTML = '';
		this.tabContainer.appendChild(wrapper);
		
		// Adds floating menu with all pages and insert option
		var menutab = this.createPageMenuTab();
		this.tabContainer.appendChild(menutab);
		var insertTab = null;
		
		// Not chromeless and not read-only file
		if (graph.isEnabled())
		{
			insertTab = this.createPageInsertTab();
			this.tabContainer.appendChild(insertTab);
		}
		
		if (wrapper.clientWidth > this.tabContainer.clientWidth - btnWidth)
		{
			if (insertTab != null)
			{
				insertTab.style.position = 'absolute';
				insertTab.style.right = '0px';
				wrapper.style.marginRight = '30px';
			}
			
			var temp = this.createControlTab(4, '&nbsp;&#10094;&nbsp;');
			temp.style.position = 'absolute';
			temp.style.right = (this.editor.chromeless) ? '29px' : '55px';
			temp.style.fontSize = '13pt';
			
			this.tabContainer.appendChild(temp);
			
			var temp2 = this.createControlTab(4, '&nbsp;&#10095;');
			temp2.style.position = 'absolute';
			temp2.style.right = (this.editor.chromeless) ? '0px' : '29px';
			temp2.style.fontSize = '13pt';
			
			this.tabContainer.appendChild(temp2);
			
			// TODO: Scroll to current page
			var dx = Math.max(0, this.tabContainer.clientWidth - ((this.editor.chromeless) ? 86 : 116));
			wrapper.style.width = dx + 'px';
			
			var fade = 50;
			
			mxEvent.addListener(temp, 'click', mxUtils.bind(this, function(evt)
			{
				wrapper.scrollLeft -= Math.max(20, dx - 20);
				mxUtils.setOpacity(temp, (wrapper.scrollLeft > 0) ? 100 : fade);
				mxUtils.setOpacity(temp2, (wrapper.scrollLeft < wrapper.scrollWidth - wrapper.clientWidth) ? 100 : fade);
				mxEvent.consume(evt);
			}));
		
			mxUtils.setOpacity(temp, (wrapper.scrollLeft > 0) ? 100 : fade);
			mxUtils.setOpacity(temp2, (wrapper.scrollLeft < wrapper.scrollWidth - wrapper.clientWidth) ? 100 : fade);

			mxEvent.addListener(temp2, 'click', mxUtils.bind(this, function(evt)
			{
				wrapper.scrollLeft += Math.max(20, dx - 20);
				mxUtils.setOpacity(temp, (wrapper.scrollLeft > 0) ? 100 : fade);
				mxUtils.setOpacity(temp2, (wrapper.scrollLeft < wrapper.scrollWidth - wrapper.clientWidth) ? 100 : fade);
				mxEvent.consume(evt);
			}));
		}
	}
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createTab = function(hoverEnabled)
{
	var tab = document.createElement('div');
	tab.style.display = (mxClient.IS_QUIRKS) ? 'inline' : 'inline-block';
	tab.style.whiteSpace = 'nowrap';
	tab.style.boxSizing = 'border-box';
	tab.style.position = 'relative';
	tab.style.overflow = 'hidden';
	tab.style.marginLeft = '-1px';
	tab.style.height = this.tabContainer.clientHeight + 'px';
	tab.style.padding = '8px 4px 8px 4px';
	tab.style.border = '1px solid #c0c0c0';
	tab.style.borderBottomStyle = 'solid';
	tab.style.backgroundColor = this.tabContainer.style.backgroundColor;
	tab.style.cursor = 'default';
	tab.style.color = 'gray';

	if (hoverEnabled)
	{
		mxEvent.addListener(tab, 'mouseenter', mxUtils.bind(this, function(evt)
		{
			if (!this.editor.graph.isMouseDown)
			{
				tab.style.backgroundColor = '#d3d3d3';
				mxEvent.consume(evt);
			}
		}));
		
		mxEvent.addListener(tab, 'mouseleave', mxUtils.bind(this, function(evt)
		{
			tab.style.backgroundColor = this.tabContainer.style.backgroundColor;
			mxEvent.consume(evt);
		}));
	}
	
	return tab;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createControlTab = function(paddingTop, html)
{
	var tab = this.createTab(true);
	tab.style.paddingTop = paddingTop + 'px';
	tab.style.cursor = 'pointer';
	tab.style.width = '30px';
	tab.style.lineHeight = '30px';
	tab.innerHTML = html;

	if (tab.firstChild != null && tab.firstChild.style != null)
	{
		mxUtils.setOpacity(tab.firstChild, 40);
	}
	
	return tab;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createPageMenuTab = function()
{
	var tab = this.createControlTab(3, '<div class="geSprite geSprite-dots" style="display:inline-block;width:21px;height:21px;"></div>');
	tab.setAttribute('title', mxResources.get('pages'));
	tab.style.position = 'absolute';
	tab.style.left = '1px';
	
	mxEvent.addListener(tab, 'click', mxUtils.bind(this, function(evt)
	{
		this.editor.graph.popupMenuHandler.hideMenu();
		var menu = new mxPopupMenu(mxUtils.bind(this, function(menu, parent)
		{
			for (var i = 0; i < this.pages.length; i++)
			{
				(mxUtils.bind(this, function(index)
				{
					var item = menu.addItem(this.pages[index].getName(), null, mxUtils.bind(this, function()
					{
						this.selectPage(this.pages[index]);
					}), parent);
					
					// Adds checkmark to current page
					if (this.pages[index] == this.currentPage)
					{
						menu.addCheckmark(item, Editor.checkmarkImage);
					}
				}))(i);
			}
			
			if (this.editor.graph.isEnabled())
			{
				menu.addSeparator(parent);
				
				var item = menu.addItem(mxResources.get('insertPage'), null, mxUtils.bind(this, function()
				{
					this.insertPage();
				}), parent);

				var page = this.currentPage;
				
				if (page != null)
				{
					menu.addSeparator(parent);
	
					menu.addItem(mxResources.get('delete'), null, mxUtils.bind(this, function()
					{
						this.removePage(page);
					}), parent);
					
					menu.addItem(mxResources.get('rename'), null, mxUtils.bind(this, function()
					{
						this.renamePage(page, page.getName());
					}), parent);
					
					menu.addSeparator(parent);
					
					menu.addItem(mxResources.get('duplicate'), null, mxUtils.bind(this, function()
					{
						this.duplicatePage(page, mxResources.get('copyOf', [page.getName()]));
					}), parent);
				}
			}
		}));
		
		menu.div.className += ' geMenubarMenu';
		menu.smartSeparators = true;
		menu.showDisabled = true;
		menu.autoExpand = true;
		
		// Disables autoexpand and destroys menu when hidden
		menu.hideMenu = mxUtils.bind(this, function()
		{
			mxPopupMenu.prototype.hideMenu.apply(menu, arguments);
			menu.destroy();
		});
	
		var x = mxEvent.getClientX(evt);
		var y = mxEvent.getClientY(evt);
		menu.popup(x, y, null, evt);
		
		// Allows hiding by clicking on document
		this.setCurrentMenu(menu);

		mxEvent.consume(evt);
	}));
	
	return tab;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createPageInsertTab = function()
{
	var tab = this.createControlTab(4, '<div class="geSprite geSprite-plus" style="display:inline-block;width:21px;height:21px;"></div>');
	tab.setAttribute('title', mxResources.get('insertPage'));
	var graph = this.editor.graph;
	
	mxEvent.addListener(tab, 'click', mxUtils.bind(this, function(evt)
	{
		this.insertPage();
		mxEvent.consume(evt);
	}));
	
	return tab;
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createTabForPage = function(page, tabWidth, hoverEnabled)
{
	var tab = this.createTab(hoverEnabled);
	var name = page.getName();
	tab.setAttribute('title', name);
	mxUtils.write(tab, name);
	tab.style.maxWidth = tabWidth + 'px';
	tab.style.width = tabWidth + 'px';
	this.addTabListeners(page, tab);
	
	if (tabWidth > 42)
	{
		tab.style.textOverflow = 'ellipsis';
	}
	
	return tab;
};

/**
 * 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.addTabListeners = function(page, tab)
{
	mxEvent.disableContextMenu(tab);
	var graph = this.editor.graph;
	var model = graph.model;

	mxEvent.addListener(tab, 'dblclick', mxUtils.bind(this, function(evt)
	{
		this.renamePage(page)
		mxEvent.consume(evt);
	}));
	
	var menuWasVisible = false;
	var pageWasActive = false;
	
	mxEvent.addGestureListeners(tab, mxUtils.bind(this, function(evt)
	{
		// Do not consume event here to allow for drag and drop of tabs
		menuWasVisible = this.currentMenu != null;
		pageWasActive = page == this.currentPage;
		
		if (!graph.isMouseDown && !pageWasActive)
		{
			this.selectPage(page);
		}
	}), null, mxUtils.bind(this, function(evt)
	{
		if (graph.isEnabled() && !graph.isMouseDown &&
			((mxEvent.isTouchEvent(evt) && pageWasActive) ||
			mxEvent.isPopupTrigger(evt)))
		{
			graph.popupMenuHandler.hideMenu();
			this.hideCurrentMenu();

			if (!mxEvent.isTouchEvent(evt) || !menuWasVisible)
			{
				var menu = new mxPopupMenu(this.createPageMenu(page));
				
				menu.div.className += ' geMenubarMenu';
				menu.smartSeparators = true;
				menu.showDisabled = true;
				menu.autoExpand = true;
				
				// Disables autoexpand and destroys menu when hidden
				menu.hideMenu = mxUtils.bind(this, function()
				{
					mxPopupMenu.prototype.hideMenu.apply(menu, arguments);
					this.resetCurrentMenu();
					menu.destroy();
				});
		
				var x = mxEvent.getClientX(evt);
				var y = mxEvent.getClientY(evt);
				menu.popup(x, y, null, evt);
				this.setCurrentMenu(menu, tab);
			}
			
			mxEvent.consume(evt);
		}
	}));
};

/**
 * Returns true if the given string contains an mxfile.
 */
EditorUi.prototype.createPageMenu = function(page, label)
{
	return mxUtils.bind(this, function(menu, parent)
	{
		var graph = this.editor.graph;
		var model = graph.model;

		menu.addItem(mxResources.get('insert'), null, mxUtils.bind(this, function()
		{
			this.insertPage(null, mxUtils.indexOf(this.pages, page) + 1);
		}), parent);
	
		menu.addItem(mxResources.get('delete'), null, mxUtils.bind(this, function()
		{
			this.removePage(page);
		}), parent);
		
		menu.addItem(mxResources.get('rename'), null, mxUtils.bind(this, function()
		{
			this.renamePage(page, label);
		}), parent);
		
		menu.addSeparator(parent);
		
		menu.addItem(mxResources.get('duplicate'), null, mxUtils.bind(this, function()
		{
			this.duplicatePage(page, mxResources.get('copyOf', [page.getName()]));
		}), parent);
	});
};