/*
 * jQuery Dialogr
 *
 * This plugins is a modified copy of jQuery UI Dialog widget, adding minimize, restore and maximize buttons
 * Developed by Carlos Carvalhar (http://carvalhar.com) with the help of Ciro Anunciação (http://voxelmidia.com.br) when working at PixFly (http://pixfly.com.br)
 *
 * This code was based in two resources:
 * http://www.profissionaisti.com.br/2008/11/jquery-dialog-melhorias-interessantes  by Jackson Caset
 * http://old.nabble.com/How-to-%22properly%22-extend-the-jQuery-UI-Dialog-widget-----td24182676s27240.html
 *  
 *  
 * Depends:
 *	jQuery  (http://jquery.com)
 *  jQuery UI Core, Draggable, Resizable (http://jqueryui.com)
 *
 */
(function($) {

var setDataSwitch = {
		dragStart: "start.draggable",
		drag: "drag.draggable",
		dragStop: "stop.draggable",
		maxHeight: "maxHeight.resizable",
		minHeight: "minHeight.resizable",
		maxWidth: "maxWidth.resizable",
		minWidth: "minWidth.resizable",
		resizeStart: "start.resizable",
		resize: "drag.resizable",
		resizeStop: "stop.resizable"
	},
	
	uiDialogClasses =
		'ui-dialog ' +
		'ui-widget ' +
		'ui-widget-content ' +
		'ui-corner-all ';

$.widget("ui.dialogr", {
		 
	_init: function() {
		this.originalTitle = this.element.attr('title');
		
		var self = this,
			options = this.options,

			title = options.title || this.originalTitle || ' ',
			titleId = $.ui.dialogr.getTitleId(this.element),

			uiDialog = (this.uiDialog = $('<div/>'))
				.appendTo(document.body)
				.hide()
				.addClass(uiDialogClasses + options.dialogClass)
				.css({
					position: 'absolute',
					overflow: 'hidden',
					zIndex: options.zIndex
				})
				// setting tabIndex makes the div focusable
				// setting outline to 0 prevents a border on focus in Mozilla
				.attr('tabIndex', -1).css('outline', 0).keydown(function(event) {
					(options.closeOnEscape && event.keyCode
						&& event.keyCode == $.ui.keyCode.ESCAPE && self.close(event));
				})
				.attr({
					role: 'dialog',
					'aria-labelledby': titleId
				})
				.mousedown(function(event) {
					self.moveToTop(false, event);
				}),

			uiDialogContent = this.element
				.show()
				.removeAttr('title')
				.addClass(
					'ui-dialog-content ' +
					'ui-widget-content')
				.appendTo(uiDialog),

			uiDialogTitlebar = (this.uiDialogTitlebar = $('<div></div>'))
				.addClass(
					'ui-dialog-titlebar ' +
					'ui-widget-header ' +
					'ui-corner-all ' +
					'ui-helper-clearfix'
				)
				.prependTo(uiDialog),

			uiDialogTitlebarClose = $('<a href="#"/>')
				.addClass(
					'ui-dialog-titlebar-close ' +
					'ui-corner-all'
				)
				.attr('role', 'button')
				.hover(
					function() {
						uiDialogTitlebarClose.addClass('ui-state-hover');
					},
					function() {
						uiDialogTitlebarClose.removeClass('ui-state-hover');
					}
				)
				.focus(function() {
					uiDialogTitlebarClose.addClass('ui-state-focus');
				})
				.blur(function() {
					uiDialogTitlebarClose.removeClass('ui-state-focus');
				})
				.mousedown(function(ev) {
					ev.stopPropagation();
				})
				.click(function(event) {
					self.close(event);
					return false;
				})
				.appendTo(uiDialogTitlebar),

			uiDialogTitlebarCloseText = (this.uiDialogTitlebarCloseText = $('<span/>'))
				.addClass(
					'ui-icon ' +
					'ui-icon-closethick'
				)
				.text(options.closeText)
				.appendTo(uiDialogTitlebarClose),

			uiDialogTitle = $('<span/>')
				.addClass('ui-dialog-title')
				.attr('id', titleId)
				.html(title)
				.prependTo(uiDialogTitlebar);

		uiDialogTitlebar.find("*").add(uiDialogTitlebar).disableSelection();

		(options.draggable && $.fn.draggable && this._makeDraggable());
		(options.resizable && $.fn.resizable && this._makeResizable());

		this._createButtons(options.buttons);
		this._isOpen = false;

		(options.bgiframe && $.fn.bgiframe && uiDialog.bgiframe());
		(options.autoOpen && this.open());
		
		this.originalSize();
		$(".ui-resizable-se").css('z-index',99999);		
		this.changeTheSize();
		
		this.uiDialog.bind('dragstop', function(event, ui) {
                if (self.minimized) {
					return false;
				}
            })
            .bind('resize', function(event, ui) {
				self.changeTheSize();
				
            });
		
			/* Adding maximize button */
		if (self.options.maximized) {	 			
			uiDialogTitlebar.append('<a href="#" id="dialog-maximize" class="ui-dialog-titlebar-max"><span>Max</span></a>');
			this.uiDialogTitlebarMax = $('#dialog-maximize', uiDialogTitlebar).hover(function(){
				$(this).addClass('ui-dialog-titlebar-max-hover');
			}, function(){
				$(this).removeClass('ui-dialog-titlebar-max-hover');
			}).mousedown(function(ev){
				ev.stopPropagation();
			}).click(function(){
				self.maximize();
				return false;
			});
			
			/* Allow titlebar doubleclick to maximize/restore the dialog. */
			uiDialogTitlebar.bind("dblclick", function() {
				if(window.maximized) {
					self.restore();
				} else {
					self.maximize();	
				}
			});	
		}
		
		/* Adding minimize button */
			
		if (self.options.minimized) {
			uiDialogTitlebar.append('<a href="#" id="dialog-minimize" class="ui-dialog-titlebar-min"><span>Min</span></a>');
			this.uiDialogTitlebarMax = $('#dialog-minimize', uiDialogTitlebar).hover(function(){
				$(this).addClass('ui-dialog-titlebar-min-hover');
			}, function(){
				$(this).removeClass('ui-dialog-titlebar-min-hover');
			}).mousedown(function(ev){
				ev.stopPropagation();
			}).click(function(){
				self.minimize();
				return false;
			});
			
			
		}
		
		/* Adding restore button */
		
		if (self.options.minimized || self.options.maximized ) {
		
			uiDialogTitlebar.append('<a href="#" id="dialog-restore" class="ui-dialog-titlebar-rest"><span>Restore</span></a>');
				this.uiDialogTitlebarMin = $('#dialog-restore', uiDialogTitlebar).hover(function(){
					$(this).addClass('ui-dialog-titlebar-rest-hover');
				}, function(){
					$(this).removeClass('ui-dialog-titlebar-rest-hover');
				}).mousedown(function(ev){
					ev.stopPropagation();
				}).click(function(){
					self.restore();
					return false;
				}).hide();
		}
	},

	destroy: function() {
		(this.overlay && this.overlay.destroy());
		this.uiDialog.hide();
		this.element
			.unbind('.dialog')
			.removeData('dialog')
			.removeClass('ui-dialog-content ui-widget-content')
			.hide().appendTo('body');
		this.uiDialog.remove();

		(this.originalTitle && this.element.attr('title', this.originalTitle));
	},

	close: function(event) {
		var self = this;
		
		if (false === self._trigger('beforeclose', event)) {
			return;
		}

		(self.overlay && self.overlay.destroy());
		self.uiDialog.unbind('keypress.ui-dialog');

		(self.options.hide
			? self.uiDialog.hide(self.options.hide, function() {
				self._trigger('close', event);
			})
			: self.uiDialog.hide() && self._trigger('close', event));

		$.ui.dialogr.overlay.resize();

		self._isOpen = false;
		
		// adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
		if (self.options.modal) {
			var maxZ = 0;
			$('.ui-dialog').each(function() {
				if (this != self.uiDialog[0]) {
					maxZ = Math.max(maxZ, $(this).css('z-index'));
				}
			});
			$.ui.dialogr.maxZ = maxZ;
		}
	},

	isOpen: function() {
		return this._isOpen;
	},

	// the force parameter allows us to move modal dialogs to their correct
	// position on open
	moveToTop: function(force, event) {

		if ((this.options.modal && !force)
			|| (!this.options.stack && !this.options.modal)) {
			return this._trigger('focus', event);
		}
		
		if (this.options.zIndex > $.ui.dialogr.maxZ) {
			$.ui.dialogr.maxZ = this.options.zIndex;
		}
		(this.overlay && this.overlay.$el.css('z-index', $.ui.dialogr.overlay.maxZ = ++$.ui.dialogr.maxZ));

		//Save and then restore scroll since Opera 9.5+ resets when parent z-Index is changed.
		//  http://ui.jquery.com/bugs/ticket/3193
		var saveScroll = { scrollTop: this.element.attr('scrollTop'), scrollLeft: this.element.attr('scrollLeft') };
		this.uiDialog.css('z-index', ++$.ui.dialogr.maxZ);
		this.element.attr(saveScroll);
		this._trigger('focus', event);
	},

	open: function() {
		if (this._isOpen) { return; }

		var options = this.options,
			uiDialog = this.uiDialog;

		this.overlay = options.modal ? new $.ui.dialogr.overlay(this) : null;
		(uiDialog.next().length && uiDialog.appendTo('body'));
		this._size();
		this._position(options.position);
		uiDialog.show(options.show);
		this.moveToTop(true);

		// prevent tabbing out of modal dialogs
		(options.modal && uiDialog.bind('keypress.ui-dialog', function(event) {
			if (event.keyCode != $.ui.keyCode.TAB) {
				return;
			}

			var tabbables = $(':tabbable', this),
				first = tabbables.filter(':first')[0],
				last  = tabbables.filter(':last')[0];

			if (event.target == last && !event.shiftKey) {
				setTimeout(function() {
					first.focus();
				}, 1);
			} else if (event.target == first && event.shiftKey) {
				setTimeout(function() {
					last.focus();
				}, 1);
			}
		}));

		// set focus to the first tabbable element in the content area or the first button
		// if there are no tabbable elements, set focus on the dialog itself
		$([])
			.add(uiDialog.find('.ui-dialog-content :tabbable:first'))
			.add(uiDialog.find('.ui-dialog-buttonpane :tabbable:first'))
			.add(uiDialog)
			.filter(':first')
			.focus();

		this._trigger('open');
		this._isOpen = true;
		
		/* Bug: Google Chrome can't render very well, so without this part changeTheSize() doesn't work */
		var is_chrome = navigator.userAgent.toLowerCase().indexOf('chrome') > -1;
		if (is_chrome) {
			var obj = this;
			setTimeout(function(){obj.restore();}, 100);
		}
		
	},

	_createButtons: function(buttons) {
		var self = this,
			hasButtons = false,
			uiDialogButtonPane = $('<div></div>')
				.addClass(
					'ui-dialog-buttonpane ' +
					'ui-widget-content ' +
					'ui-helper-clearfix'
				);

		// if we already have a button pane, remove it
		this.uiDialog.find('.ui-dialog-buttonpane').remove();

		(typeof buttons == 'object' && buttons !== null &&
			$.each(buttons, function() { return !(hasButtons = true); }));
		if (hasButtons) {
			$.each(buttons, function(name, fn) {
				$('<button type="button"></button>')
					.addClass(
						'ui-state-default ' +
						'ui-corner-all'
					)
					.text(name)
					.click(function() { fn.apply(self.element[0], arguments); })
					.hover(
						function() {
							$(this).addClass('ui-state-hover');
						},
						function() {
							$(this).removeClass('ui-state-hover');
						}
					)
					.focus(function() {
						$(this).addClass('ui-state-focus');
					})
					.blur(function() {
						$(this).removeClass('ui-state-focus');
					})
					.appendTo(uiDialogButtonPane);
			});
			uiDialogButtonPane.appendTo(this.uiDialog);
		}
	},

	_makeDraggable: function() {
		var self = this,
			options = this.options,
			heightBeforeDrag;
		
		this.uiDialog.draggable({
			cancel: '.ui-dialog-content',
			handle: '.ui-dialog-titlebar',
			containment: 'document',
			start: function() {
				heightBeforeDrag = options.height;
				$(this).height($(this).height()).addClass("ui-dialog-dragging");
				(options.dragStart && options.dragStart.apply(self.element[0], arguments));
			},
			drag: function() {
				(options.drag && options.drag.apply(self.element[0], arguments));
			},
			stop: function() {
				$(this).removeClass("ui-dialog-dragging").height(heightBeforeDrag);
				(options.dragStop && options.dragStop.apply(self.element[0], arguments));
				$.ui.dialogr.overlay.resize();
			}
		});
	},

	_makeResizable: function(handles) {
		handles = (handles === undefined ? this.options.resizable : handles);
		var self = this,
			options = this.options,
			resizeHandles = typeof handles == 'string'
				? handles
				: 'n,e,s,w,se,sw,ne,nw';

		this.uiDialog.resizable({
			cancel: '.ui-dialog-content',
			alsoResize: this.element,
			maxWidth: options.maxWidth,
			maxHeight: options.maxHeight,
			minWidth: options.minWidth,
			minHeight: options.minHeight,
			start: function() {
				$(this).addClass("ui-dialog-resizing");
				(options.resizeStart && options.resizeStart.apply(self.element[0], arguments));
			},
			resize: function() {
				(options.resize && options.resize.apply(self.element[0], arguments));
			},
			handles: resizeHandles,
			stop: function() {
				$(this).removeClass("ui-dialog-resizing");
				options.height = $(this).height();
				options.width = $(this).width();
				(options.resizeStop && options.resizeStop.apply(self.element[0], arguments));
				$.ui.dialogr.overlay.resize();
			}
		})
		.find('.ui-resizable-se').addClass('ui-icon ui-icon-grip-diagonal-se');
	},

	_position: function(pos) {
		var wnd = $(window), doc = $(document),
			pTop = doc.scrollTop(), pLeft = doc.scrollLeft(),
			minTop = pTop;

		if ($.inArray(pos, ['center','top','right','bottom','left']) >= 0) {
			pos = [
				pos == 'right' || pos == 'left' ? pos : 'center',
				pos == 'top' || pos == 'bottom' ? pos : 'middle'
			];
		}
		if (pos.constructor != Array) {
			pos = ['center', 'middle'];
		}
		if (pos[0].constructor == Number) {
			pLeft += pos[0];
		} else {
			switch (pos[0]) {
				case 'left':
					pLeft += 0;
					break;
				case 'right':
					pLeft += wnd.width() - this.uiDialog.outerWidth();
					break;
				default:
				case 'center':
					pLeft += (wnd.width() - this.uiDialog.outerWidth()) / 2;
			}
		}
		if (pos[1].constructor == Number) {
			pTop += pos[1];
		} else {
			switch (pos[1]) {
				case 'top':
					pTop += 0;
					break;
				case 'bottom':
					pTop += wnd.height() - this.uiDialog.outerHeight();
					break;
				default:
				case 'middle':
					pTop += (wnd.height() - this.uiDialog.outerHeight()) / 2;
			}
		}

		// prevent the dialog from being too high (make sure the titlebar
		// is accessible)
		pTop = Math.max(pTop, minTop);
		this.uiDialog.css({bottom: 0, left: pLeft});
	},

	_setData: function(key, value){
		(setDataSwitch[key] && this.uiDialog.data(setDataSwitch[key], value));
		switch (key) {
			case "buttons":
				this._createButtons(value);
				break;
			case "closeText":
				this.uiDialogTitlebarCloseText.text(value);
				break;
			case "dialogClass":
				this.uiDialog
					.removeClass(this.options.dialogClass)
					.addClass(uiDialogClasses + value);
				break;
			case "draggable":
				(value
					? this._makeDraggable()
					: this.uiDialog.draggable('destroy'));
				break;
			case "height":
				this.uiDialog.height(value);
				break;
			case "position":
				this._position(value);
				break;
			case "resizable":
				var uiDialog = this.uiDialog,
					isResizable = this.uiDialog.is(':data(resizable)');

				// currently resizable, becoming non-resizable
				(isResizable && !value && uiDialog.resizable('destroy'));

				// currently resizable, changing handles
				(isResizable && typeof value == 'string' &&
					uiDialog.resizable('option', 'handles', value));

				// currently non-resizable, becoming resizable
				(isResizable || this._makeResizable(value));
				break;
			case "title":
				$(".ui-dialog-title", this.uiDialogTitlebar).html(value || '&nbsp;');
				break;
			case "width":
				this.uiDialog.width(value);
				break;
		}

		$.widget.prototype._setData.apply(this, arguments);

	},
	
	/* Allow restore the dialog */
	restore: function() {
		window.maximized=false; /* reset both states (restored) */
		window.minimized=false;
		$('.ui-dialog-content').show();
		$('#dialog-maximize').show();
		$('#dialog-restore').hide();
		$('#dialog-minimize').show();
		this.uiDialog.css({position:'absolute', width: this.options.width, height:this.options.height});
		this.position(this.options.position);
		$('#dialog-restore').css('right','1.5em');
		this._setData("resizable", true);
		this._setData("draggable", true);
		this.uiDialog.removeClass("dialogr-minimized");
		//$('.ui-dialog-titlebar ').css('background', 'none repeat scroll 0 0 #FFFFFF');
		this.originalSize();
		this.changeTheSize();
		this.adjustScrollContent();
	},	
	
	/* Minimize to a custom position */
	minimize: function() {		
		window.minimized=true; /* save the current state: minimized */
		window.maximized=false;
		$('.ui-dialog-content').hide();
		this._setData("resizable", false);
		this._setData("draggable", false);
		this.uiDialog.addClass("dialogr-minimized");
		$('#dialog-restore').show();
		$('#dialog-maximize').show();
		$('#dialog-minimize').hide();
		$('#dialog-restore').css('right','2.8em');
		this.uiDialog.css('top','auto'); /* needed because top has a default value and this breaks bottom value */
		this.size();
		this.uiDialog.css({position:"absolute", left:"10px", width: 250, height: 100, bottom:"-60px"});
		this.uiDialog.css('position','fixed'); /* sticky the dialog at the page to avoid scrolling */
		$('#dialog-restore').css('display', 'block');
	},
	
	/* Maximize to the whole visible size of the window */
	maximize: function() {		
		window.maximized=true; /* save the current state: maximized */
		window.minimized=false;
		this._setData("resizable", true);
		this._setData("draggable", true);
		$('.ui-dialog-content').show();		
		
		/* A different width and height for each browser...wondering why? */
		marginHDialog = 25; marginWDialog  = 25;
		if ($.browser.msie && $.browser.version == 8) {marginHDialog = 25; marginWDialog  = 52;}
		marginHDialog = $(window).height()-marginHDialog;
		marginWDialog = $(window.body).width()-marginWDialog;
		this.uiDialog.css({left:10, top:$(document).scrollTop()+5 , width:marginWDialog+"px" , height:marginHDialog+"px"});
		
		//$('.ui-dialog').trigger("resize");
		this.uiDialog.removeClass("dialogr-minimized");
		//$('.ui-dialog-titlebar ').css('background', 'none repeat scroll 0 0 #FFFFFF');
		$('#dialog-restore').show();
		$('#dialog-maximize').hide();
		$('#dialog-minimize').show();
		
		$('#dialog-restore').css('right','1.5em');
		this.size();
		this.uiDialog.css('position','absolute');
		this.adjustScrollContent();
		
	},
	
	/* Store the size of dialog, before it gets minimized or maximized */
	originalSize: function() {		
		this.options.height = this.uiDialog.height();
		this.options.width = this.uiDialog.width();
	},
	
	changeTheSize: function() {
			marginH = 11; 
			marginW = 17; 
			
			/* Can't understand why, but all browsers have different heights and widht... */
			if ($.browser.msie) {marginH = 10; marginW = 18; }
			if ($.browser.safari) {marginH = 12; marginW  = 16;}

			
			$('#dialog').css('width', ($('#dialog').width()-3)+"px");
			$('.ui-resizable-w').css('height', ($('.ui-dialog').height() - $('.ui-resizable-sw').height() - marginH)+"px");
			$('.ui-resizable-e').css('height', ($('.ui-dialog').height() - $('.ui-resizable-se').height() - marginH))+"px";
			$('.ui-resizable-n').css('width', ($('.ui-dialog').width() - $('.ui-resizable-ne').width() - $('.ui-resizable-nw').width() + marginW))+"px";
			$('.ui-resizable-s').css('width', ($('.ui-dialog').width() - $('.ui-resizable-se').width() - $('.ui-resizable-sw').width() + marginW)+"px");
	},
	
	/* Saves all css related to the dialog position before maximize or minimize */
	position: function(pos) {
		var wnd = $(window), doc = $(document),
			pTop = doc.scrollTop(), pLeft = doc.scrollLeft(),
			minTop = pTop;
		
		if ($.inArray(pos, ['center','top','right','bottom','left']) >= 0) {
			pos = [
				pos == 'right' || pos == 'left' ? pos : 'center',
				pos == 'top' || pos == 'bottom' ? pos : 'middle'
			];
		}
		if (pos.constructor != Array) {
			pos = ['center', 'middle'];
		}
		if (pos[0].constructor == Number) {
			pLeft += pos[0];
		} else {
			switch (pos[0]) {
				case 'left':
					pLeft += 0;
					break;
				case 'right':
					pLeft += wnd.width() - this.uiDialog.width();
					break;
				default:
				case 'center':
					pLeft += (wnd.width() - this.uiDialog.width()) / 2;
			}
		}
		if (pos[1].constructor == Number) {
			pTop += pos[1];
		} else {
			switch (pos[1]) {
				case 'top':
					pTop += 0;
					break;
				case 'bottom':
					pTop += wnd.height() - this.uiDialog.height();
					break;
				default:
				case 'middle':
					pTop += (wnd.height() - this.uiDialog.height()) / 2;
			}
		}
		
		// prevent the dialog from being too high (make sure the titlebar is accessible)
		pTop = Math.max(pTop, minTop);
		this.uiDialog.css({bottom: 0, left: pLeft});
	},
	
	/* Adjuste the content inside the dialog on maximize/restore */
	adjustScrollContent: function () {
		var heightDialog = (this.uiDialog.height() - 72) + 'px'
		var widthDialog = (this.uiDialog.width()-65) + 'px'
		$('.ui-dialog-content').css({width: widthDialog, height: heightDialog});
		$('#dialog').css({width: widthDialog, height: heightDialog});
	},
	
		
	dispatchThisEvent: function(elId) {
		
		var evt;
		var el = elId;
		if (document.createEvent){
			evt = document.createEvent("Event");
			evt.initEvent("resize", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null);
		}
		(evt)? el.dispatchEvent(evt):(el.resize && el.resize());
		
	},
	
	size: function() {
		var container = this.uiDialogTitlebar.parent(),
			titlebar = this.uiDialogTitlebar,
			content = this.element,
			tbMargin = parseInt(content.css('margin-top'),10) + parseInt(content.css('margin-bottom'),10),
			lrMargin = parseInt(content.css('margin-left'),10) + parseInt(content.css('margin-right'),10);

		content.height(container.height() - titlebar.outerHeight() - tbMargin /* More precision on scroll content */ - 8);
		content.width(container.width() - lrMargin);
		
		
	},

	_size: function() {
		/* If the user has resized the dialog, the .ui-dialog and .ui-dialog-content
		 * divs will both have width and height set, so we need to reset them
		 */
		var options = this.options;

		// reset content sizing
		this.element.css({
			height: 0,
			minHeight: 0,
			width: 'auto'
		});

		// reset wrapper sizing
		// determine the height of all the non-content elements
		var nonContentHeight = this.uiDialog.css({
				height: 'auto',
				width: options.width
			})
			.height();

		this.element
			.css({
				minHeight: Math.max(options.minHeight - nonContentHeight, 0),
				height: options.height == 'auto'
					? 'auto'
					: Math.max(options.height - nonContentHeight, 0)
			});
	}
});

$.extend($.ui.dialogr, {
	version: "1.7.2",
	defaults: {
		autoOpen: true,
		bgiframe: false,
		buttons: {},
		closeOnEscape: true,
		closeText: 'close',
		dialogClass: '',
		draggable: true,
		hide: null,
		height: 'auto',
		maxHeight: false,
		maxWidth: false,
		minHeight: 150,
		minWidth: 150,
		modal: false,
		position: 'center',
		resizable: true,
		maximized: true,
		minimized: true,
		show: null,
		stack: true,
		title: '',
		width: 300,
		zIndex: 1000
	},

	getter: 'isOpen',

	uuid: 0,
	maxZ: 0,

	getTitleId: function($el) {
		return 'ui-dialog-title-' + ($el.attr('id') || ++this.uuid);
	},

	overlay: function(dialog) {
		this.$el = $.ui.dialogr.overlay.create(dialog);
	}
});

$.extend($.ui.dialogr.overlay, {
	instances: [],
	maxZ: 0,
	events: $.map('focus,mousedown,mouseup,keydown,keypress,click'.split(','),
		function(event) { return event + '.dialog-overlay'; }).join(' '),
	create: function(dialog) {
		if (this.instances.length === 0) {
			// prevent use of anchors and inputs
			// we use a setTimeout in case the overlay is created from an
			// event that we're going to be cancelling (see #2804)
			setTimeout(function() {
				// handle $(el).dialog().dialog('close') (see #4065)
				if ($.ui.dialogr.overlay.instances.length) {
					$(document).bind($.ui.dialogr.overlay.events, function(event) {
						var dialogZ = $(event.target).parents('.ui-dialog').css('zIndex') || 0;
						return (dialogZ > $.ui.dialogr.overlay.maxZ);
					});
				}
			}, 1);

			// allow closing by pressing the escape key
			$(document).bind('keydown.dialog-overlay', function(event) {
				(dialog.options.closeOnEscape && event.keyCode
						&& event.keyCode == $.ui.keyCode.ESCAPE && dialog.close(event));
			});

			// handle window resize
			$(window).bind('resize.dialog-overlay', $.ui.dialogr.overlay.resize);
		}

		var $el = $('<div></div>').appendTo(document.body)
			.addClass('ui-widget-overlay').css({
				width: this.width(),
				height: this.height()
			});

		(dialog.options.bgiframe && $.fn.bgiframe && $el.bgiframe());

		this.instances.push($el);
		return $el;
	},

	destroy: function($el) {
		this.instances.splice($.inArray(this.instances, $el), 1);

		if (this.instances.length === 0) {
			$([document, window]).unbind('.dialog-overlay');
		}

		$el.remove();
		
		// adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
		var maxZ = 0;
		$.each(this.instances, function() {
			maxZ = Math.max(maxZ, this.css('z-index'));
		});
		this.maxZ = maxZ;
	},

	height: function() {
		// handle IE 6
		if ($.browser.msie && $.browser.version < 7) {
			var scrollHeight = Math.max(
				document.documentElement.scrollHeight,
				document.body.scrollHeight
			);
			var offsetHeight = Math.max(
				document.documentElement.offsetHeight,
				document.body.offsetHeight
			);

			if (scrollHeight < offsetHeight) {
				return $(window).height() + 'px';
			} else {
				return scrollHeight + 'px';
			}
		// handle "good" browsers
		} else {
			return $(document).height() + 'px';
		}
	},

	width: function() {
		// handle IE 6
		if ($.browser.msie && $.browser.version < 7) {
			var scrollWidth = Math.max(
				document.documentElement.scrollWidth,
				document.body.scrollWidth
			);
			var offsetWidth = Math.max(
				document.documentElement.offsetWidth,
				document.body.offsetWidth
			);

			if (scrollWidth < offsetWidth) {
				return $(window).width() + 'px';
			} else {
				return scrollWidth + 'px';
			}
		// handle "good" browsers
		} else {
			return $(document).width() + 'px';
		}
	},


	resize: function() {
		/* If the dialog is draggable and the user drags it past the
		 * right edge of the window, the document becomes wider so we
		 * need to stretch the overlay. If the user then drags the
		 * dialog back to the left, the document will become narrower,
		 * so we need to shrink the overlay to the appropriate size.
		 * This is handled by shrinking the overlay before setting it
		 * to the full document size.
		 */
		var $overlays = $([]);
		$.each($.ui.dialogr.overlay.instances, function() {
			$overlays = $overlays.add(this);
		});

		$overlays.css({
			width: 0,
			height: 0
		}).css({
			width: $.ui.dialogr.overlay.width(),
			height: $.ui.dialogr.overlay.height()
		});
	}
});

$.extend($.ui.dialogr.overlay.prototype, {
	destroy: function() {
		$.ui.dialogr.overlay.destroy(this.$el);
	}
});

})(jQuery);