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1 /*
2  * jQuery UI Dialog 1.8.10
3  *
4  * Copyright 2011, AUTHORS.txt (http://jqueryui.com/about)
5  * Dual licensed under the MIT or GPL Version 2 licenses.
6  * http://jquery.org/license
7  *
8  * http://docs.jquery.com/UI/Dialog
9  *
10  * Depends:
11  *      jquery.ui.core.js
12  *      jquery.ui.widget.js
13  *  jquery.ui.button.js
14  *      jquery.ui.draggable.js
15  *      jquery.ui.mouse.js
16  *      jquery.ui.position.js
17  *      jquery.ui.resizable.js
18  */
19 (function( $, undefined ) {
20
21 var uiDialogClasses =
22                 'ui-dialog ' +
23                 'ui-widget ' +
24                 'ui-widget-content ' +
25                 'ui-corner-all ',
26         sizeRelatedOptions = {
27                 buttons: true,
28                 height: true,
29                 maxHeight: true,
30                 maxWidth: true,
31                 minHeight: true,
32                 minWidth: true,
33                 width: true
34         },
35         resizableRelatedOptions = {
36                 maxHeight: true,
37                 maxWidth: true,
38                 minHeight: true,
39                 minWidth: true
40         };
41
42 $.widget("ui.dialog", {
43         options: {
44                 autoOpen: true,
45                 buttons: {},
46                 closeOnEscape: true,
47                 closeText: 'close',
48                 dialogClass: '',
49                 draggable: true,
50                 hide: null,
51                 height: 'auto',
52                 maxHeight: false,
53                 maxWidth: false,
54                 minHeight: 150,
55                 minWidth: 150,
56                 modal: false,
57                 position: {
58                         my: 'center',
59                         at: 'center',
60                         collision: 'fit',
61                         // ensure that the titlebar is never outside the document
62                         using: function(pos) {
63                                 var topOffset = $(this).css(pos).offset().top;
64                                 if (topOffset < 0) {
65                                         $(this).css('top', pos.top - topOffset);
66                                 }
67                         }
68                 },
69                 resizable: true,
70                 show: null,
71                 stack: true,
72                 title: '',
73                 width: 300,
74                 zIndex: 1000
75         },
76
77         _create: function() {
78                 this.originalTitle = this.element.attr('title');
79                 // #5742 - .attr() might return a DOMElement
80                 if ( typeof this.originalTitle !== "string" ) {
81                         this.originalTitle = "";
82                 }
83
84                 this.options.title = this.options.title || this.originalTitle;
85                 var self = this,
86                         options = self.options,
87
88                         title = options.title || '&#160;',
89                         titleId = $.ui.dialog.getTitleId(self.element),
90
91                         uiDialog = (self.uiDialog = $('<div></div>'))
92                                 .appendTo(document.body)
93                                 .hide()
94                                 .addClass(uiDialogClasses + options.dialogClass)
95                                 .css({
96                                         zIndex: options.zIndex
97                                 })
98                                 // setting tabIndex makes the div focusable
99                                 // setting outline to 0 prevents a border on focus in Mozilla
100                                 .attr('tabIndex', -1).css('outline', 0).keydown(function(event) {
101                                         if (options.closeOnEscape && event.keyCode &&
102                                                 event.keyCode === $.ui.keyCode.ESCAPE) {
103                                                 
104                                                 self.close(event);
105                                                 event.preventDefault();
106                                         }
107                                 })
108                                 .attr({
109                                         role: 'dialog',
110                                         'aria-labelledby': titleId
111                                 })
112                                 .mousedown(function(event) {
113                                         self.moveToTop(false, event);
114                                 }),
115
116                         uiDialogContent = self.element
117                                 .show()
118                                 .removeAttr('title')
119                                 .addClass(
120                                         'ui-dialog-content ' +
121                                         'ui-widget-content')
122                                 .appendTo(uiDialog),
123
124                         uiDialogTitlebar = (self.uiDialogTitlebar = $('<div></div>'))
125                                 .addClass(
126                                         'ui-dialog-titlebar ' +
127                                         'ui-widget-header ' +
128                                         'ui-corner-all ' +
129                                         'ui-helper-clearfix'
130                                 )
131                                 .prependTo(uiDialog),
132
133                         uiDialogTitlebarClose = $('<a href="#"></a>')
134                                 .addClass(
135                                         'ui-dialog-titlebar-close ' +
136                                         'ui-corner-all'
137                                 )
138                                 .attr('role', 'button')
139                                 .hover(
140                                         function() {
141                                                 uiDialogTitlebarClose.addClass('ui-state-hover');
142                                         },
143                                         function() {
144                                                 uiDialogTitlebarClose.removeClass('ui-state-hover');
145                                         }
146                                 )
147                                 .focus(function() {
148                                         uiDialogTitlebarClose.addClass('ui-state-focus');
149                                 })
150                                 .blur(function() {
151                                         uiDialogTitlebarClose.removeClass('ui-state-focus');
152                                 })
153                                 .click(function(event) {
154                                         self.close(event);
155                                         return false;
156                                 })
157                                 .appendTo(uiDialogTitlebar),
158
159                         uiDialogTitlebarCloseText = (self.uiDialogTitlebarCloseText = $('<span></span>'))
160                                 .addClass(
161                                         'ui-icon ' +
162                                         'ui-icon-closethick'
163                                 )
164                                 .text(options.closeText)
165                                 .appendTo(uiDialogTitlebarClose),
166
167                         uiDialogTitle = $('<span></span>')
168                                 .addClass('ui-dialog-title')
169                                 .attr('id', titleId)
170                                 .html(title)
171                                 .prependTo(uiDialogTitlebar);
172
173                 //handling of deprecated beforeclose (vs beforeClose) option
174                 //Ticket #4669 http://dev.jqueryui.com/ticket/4669
175                 //TODO: remove in 1.9pre
176                 if ($.isFunction(options.beforeclose) && !$.isFunction(options.beforeClose)) {
177                         options.beforeClose = options.beforeclose;
178                 }
179
180                 uiDialogTitlebar.find("*").add(uiDialogTitlebar).disableSelection();
181
182                 if (options.draggable && $.fn.draggable) {
183                         self._makeDraggable();
184                 }
185                 if (options.resizable && $.fn.resizable) {
186                         self._makeResizable();
187                 }
188
189                 self._createButtons(options.buttons);
190                 self._isOpen = false;
191
192                 if ($.fn.bgiframe) {
193                         uiDialog.bgiframe();
194                 }
195         },
196
197         _init: function() {
198                 if ( this.options.autoOpen ) {
199                         this.open();
200                 }
201         },
202
203         destroy: function() {
204                 var self = this;
205                 
206                 if (self.overlay) {
207                         self.overlay.destroy();
208                 }
209                 self.uiDialog.hide();
210                 self.element
211                         .unbind('.dialog')
212                         .removeData('dialog')
213                         .removeClass('ui-dialog-content ui-widget-content')
214                         .hide().appendTo('body');
215                 self.uiDialog.remove();
216
217                 if (self.originalTitle) {
218                         self.element.attr('title', self.originalTitle);
219                 }
220
221                 return self;
222         },
223
224         widget: function() {
225                 return this.uiDialog;
226         },
227
228         close: function(event) {
229                 var self = this,
230                         maxZ, thisZ;
231                 
232                 if (false === self._trigger('beforeClose', event)) {
233                         return;
234                 }
235
236                 if (self.overlay) {
237                         self.overlay.destroy();
238                 }
239                 self.uiDialog.unbind('keypress.ui-dialog');
240
241                 self._isOpen = false;
242
243                 if (self.options.hide) {
244                         self.uiDialog.hide(self.options.hide, function() {
245                                 self._trigger('close', event);
246                         });
247                 } else {
248                         self.uiDialog.hide();
249                         self._trigger('close', event);
250                 }
251
252                 $.ui.dialog.overlay.resize();
253
254                 // adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
255                 if (self.options.modal) {
256                         maxZ = 0;
257                         $('.ui-dialog').each(function() {
258                                 if (this !== self.uiDialog[0]) {
259                                         thisZ = $(this).css('z-index');
260                                         if(!isNaN(thisZ)) {
261                                                 maxZ = Math.max(maxZ, thisZ);
262                                         }
263                                 }
264                         });
265                         $.ui.dialog.maxZ = maxZ;
266                 }
267
268                 return self;
269         },
270
271         isOpen: function() {
272                 return this._isOpen;
273         },
274
275         // the force parameter allows us to move modal dialogs to their correct
276         // position on open
277         moveToTop: function(force, event) {
278                 var self = this,
279                         options = self.options,
280                         saveScroll;
281
282                 if ((options.modal && !force) ||
283                         (!options.stack && !options.modal)) {
284                         return self._trigger('focus', event);
285                 }
286
287                 if (options.zIndex > $.ui.dialog.maxZ) {
288                         $.ui.dialog.maxZ = options.zIndex;
289                 }
290                 if (self.overlay) {
291                         $.ui.dialog.maxZ += 1;
292                         self.overlay.$el.css('z-index', $.ui.dialog.overlay.maxZ = $.ui.dialog.maxZ);
293                 }
294
295                 //Save and then restore scroll since Opera 9.5+ resets when parent z-Index is changed.
296                 //  http://ui.jquery.com/bugs/ticket/3193
297                 saveScroll = { scrollTop: self.element.attr('scrollTop'), scrollLeft: self.element.attr('scrollLeft') };
298                 $.ui.dialog.maxZ += 1;
299                 self.uiDialog.css('z-index', $.ui.dialog.maxZ);
300                 self.element.attr(saveScroll);
301                 self._trigger('focus', event);
302
303                 return self;
304         },
305
306         open: function() {
307                 if (this._isOpen) { return; }
308
309                 var self = this,
310                         options = self.options,
311                         uiDialog = self.uiDialog;
312
313                 self.overlay = options.modal ? new $.ui.dialog.overlay(self) : null;
314                 self._size();
315                 self._position(options.position);
316                 uiDialog.show(options.show);
317                 self.moveToTop(true);
318
319                 // prevent tabbing out of modal dialogs
320                 if (options.modal) {
321                         uiDialog.bind('keypress.ui-dialog', function(event) {
322                                 if (event.keyCode !== $.ui.keyCode.TAB) {
323                                         return;
324                                 }
325
326                                 var tabbables = $(':tabbable', this),
327                                         first = tabbables.filter(':first'),
328                                         last  = tabbables.filter(':last');
329
330                                 if (event.target === last[0] && !event.shiftKey) {
331                                         first.focus(1);
332                                         return false;
333                                 } else if (event.target === first[0] && event.shiftKey) {
334                                         last.focus(1);
335                                         return false;
336                                 }
337                         });
338                 }
339
340                 // set focus to the first tabbable element in the content area or the first button
341                 // if there are no tabbable elements, set focus on the dialog itself
342                 $(self.element.find(':tabbable').get().concat(
343                         uiDialog.find('.ui-dialog-buttonpane :tabbable').get().concat(
344                                 uiDialog.get()))).eq(0).focus();
345
346                 self._isOpen = true;
347                 self._trigger('open');
348
349                 return self;
350         },
351
352         _createButtons: function(buttons) {
353                 var self = this,
354                         hasButtons = false,
355                         uiDialogButtonPane = $('<div></div>')
356                                 .addClass(
357                                         'ui-dialog-buttonpane ' +
358                                         'ui-widget-content ' +
359                                         'ui-helper-clearfix'
360                                 ),
361                         uiButtonSet = $( "<div></div>" )
362                                 .addClass( "ui-dialog-buttonset" )
363                                 .appendTo( uiDialogButtonPane );
364
365                 // if we already have a button pane, remove it
366                 self.uiDialog.find('.ui-dialog-buttonpane').remove();
367
368                 if (typeof buttons === 'object' && buttons !== null) {
369                         $.each(buttons, function() {
370                                 return !(hasButtons = true);
371                         });
372                 }
373                 if (hasButtons) {
374                         $.each(buttons, function(name, props) {
375                                 props = $.isFunction( props ) ?
376                                         { click: props, text: name } :
377                                         props;
378                                 var button = $('<button type="button"></button>')
379                                         .attr( props, true )
380                                         .unbind('click')
381                                         .click(function() {
382                                                 props.click.apply(self.element[0], arguments);
383                                         })
384                                         .appendTo(uiButtonSet);
385                                 if ($.fn.button) {
386                                         button.button();
387                                 }
388                         });
389                         uiDialogButtonPane.appendTo(self.uiDialog);
390                 }
391         },
392
393         _makeDraggable: function() {
394                 var self = this,
395                         options = self.options,
396                         doc = $(document),
397                         heightBeforeDrag;
398
399                 function filteredUi(ui) {
400                         return {
401                                 position: ui.position,
402                                 offset: ui.offset
403                         };
404                 }
405
406                 self.uiDialog.draggable({
407                         cancel: '.ui-dialog-content, .ui-dialog-titlebar-close',
408                         handle: '.ui-dialog-titlebar',
409                         containment: 'document',
410                         start: function(event, ui) {
411                                 heightBeforeDrag = options.height === "auto" ? "auto" : $(this).height();
412                                 $(this).height($(this).height()).addClass("ui-dialog-dragging");
413                                 self._trigger('dragStart', event, filteredUi(ui));
414                         },
415                         drag: function(event, ui) {
416                                 self._trigger('drag', event, filteredUi(ui));
417                         },
418                         stop: function(event, ui) {
419                                 options.position = [ui.position.left - doc.scrollLeft(),
420                                         ui.position.top - doc.scrollTop()];
421                                 $(this).removeClass("ui-dialog-dragging").height(heightBeforeDrag);
422                                 self._trigger('dragStop', event, filteredUi(ui));
423                                 $.ui.dialog.overlay.resize();
424                         }
425                 });
426         },
427
428         _makeResizable: function(handles) {
429                 handles = (handles === undefined ? this.options.resizable : handles);
430                 var self = this,
431                         options = self.options,
432                         // .ui-resizable has position: relative defined in the stylesheet
433                         // but dialogs have to use absolute or fixed positioning
434                         position = self.uiDialog.css('position'),
435                         resizeHandles = (typeof handles === 'string' ?
436                                 handles :
437                                 'n,e,s,w,se,sw,ne,nw'
438                         );
439
440                 function filteredUi(ui) {
441                         return {
442                                 originalPosition: ui.originalPosition,
443                                 originalSize: ui.originalSize,
444                                 position: ui.position,
445                                 size: ui.size
446                         };
447                 }
448
449                 self.uiDialog.resizable({
450                         cancel: '.ui-dialog-content',
451                         containment: 'document',
452                         alsoResize: self.element,
453                         maxWidth: options.maxWidth,
454                         maxHeight: options.maxHeight,
455                         minWidth: options.minWidth,
456                         minHeight: self._minHeight(),
457                         handles: resizeHandles,
458                         start: function(event, ui) {
459                                 $(this).addClass("ui-dialog-resizing");
460                                 self._trigger('resizeStart', event, filteredUi(ui));
461                         },
462                         resize: function(event, ui) {
463                                 self._trigger('resize', event, filteredUi(ui));
464                         },
465                         stop: function(event, ui) {
466                                 $(this).removeClass("ui-dialog-resizing");
467                                 options.height = $(this).height();
468                                 options.width = $(this).width();
469                                 self._trigger('resizeStop', event, filteredUi(ui));
470                                 $.ui.dialog.overlay.resize();
471                         }
472                 })
473                 .css('position', position)
474                 .find('.ui-resizable-se').addClass('ui-icon ui-icon-grip-diagonal-se');
475         },
476
477         _minHeight: function() {
478                 var options = this.options;
479
480                 if (options.height === 'auto') {
481                         return options.minHeight;
482                 } else {
483                         return Math.min(options.minHeight, options.height);
484                 }
485         },
486
487         _position: function(position) {
488                 var myAt = [],
489                         offset = [0, 0],
490                         isVisible;
491
492                 if (position) {
493                         // deep extending converts arrays to objects in jQuery <= 1.3.2 :-(
494         //              if (typeof position == 'string' || $.isArray(position)) {
495         //                      myAt = $.isArray(position) ? position : position.split(' ');
496
497                         if (typeof position === 'string' || (typeof position === 'object' && '0' in position)) {
498                                 myAt = position.split ? position.split(' ') : [position[0], position[1]];
499                                 if (myAt.length === 1) {
500                                         myAt[1] = myAt[0];
501                                 }
502
503                                 $.each(['left', 'top'], function(i, offsetPosition) {
504                                         if (+myAt[i] === myAt[i]) {
505                                                 offset[i] = myAt[i];
506                                                 myAt[i] = offsetPosition;
507                                         }
508                                 });
509
510                                 position = {
511                                         my: myAt.join(" "),
512                                         at: myAt.join(" "),
513                                         offset: offset.join(" ")
514                                 };
515                         } 
516
517                         position = $.extend({}, $.ui.dialog.prototype.options.position, position);
518                 } else {
519                         position = $.ui.dialog.prototype.options.position;
520                 }
521
522                 // need to show the dialog to get the actual offset in the position plugin
523                 isVisible = this.uiDialog.is(':visible');
524                 if (!isVisible) {
525                         this.uiDialog.show();
526                 }
527                 this.uiDialog
528                         // workaround for jQuery bug #5781 http://dev.jquery.com/ticket/5781
529                         .css({ top: 0, left: 0 })
530                         .position($.extend({ of: window }, position));
531                 if (!isVisible) {
532                         this.uiDialog.hide();
533                 }
534         },
535
536         _setOptions: function( options ) {
537                 var self = this,
538                         resizableOptions = {},
539                         resize = false;
540
541                 $.each( options, function( key, value ) {
542                         self._setOption( key, value );
543                         
544                         if ( key in sizeRelatedOptions ) {
545                                 resize = true;
546                         }
547                         if ( key in resizableRelatedOptions ) {
548                                 resizableOptions[ key ] = value;
549                         }
550                 });
551
552                 if ( resize ) {
553                         this._size();
554                 }
555                 if ( this.uiDialog.is( ":data(resizable)" ) ) {
556                         this.uiDialog.resizable( "option", resizableOptions );
557                 }
558         },
559
560         _setOption: function(key, value){
561                 var self = this,
562                         uiDialog = self.uiDialog;
563
564                 switch (key) {
565                         //handling of deprecated beforeclose (vs beforeClose) option
566                         //Ticket #4669 http://dev.jqueryui.com/ticket/4669
567                         //TODO: remove in 1.9pre
568                         case "beforeclose":
569                                 key = "beforeClose";
570                                 break;
571                         case "buttons":
572                                 self._createButtons(value);
573                                 break;
574                         case "closeText":
575                                 // ensure that we always pass a string
576                                 self.uiDialogTitlebarCloseText.text("" + value);
577                                 break;
578                         case "dialogClass":
579                                 uiDialog
580                                         .removeClass(self.options.dialogClass)
581                                         .addClass(uiDialogClasses + value);
582                                 break;
583                         case "disabled":
584                                 if (value) {
585                                         uiDialog.addClass('ui-dialog-disabled');
586                                 } else {
587                                         uiDialog.removeClass('ui-dialog-disabled');
588                                 }
589                                 break;
590                         case "draggable":
591                                 var isDraggable = uiDialog.is( ":data(draggable)" );
592                                 if ( isDraggable && !value ) {
593                                         uiDialog.draggable( "destroy" );
594                                 }
595                                 
596                                 if ( !isDraggable && value ) {
597                                         self._makeDraggable();
598                                 }
599                                 break;
600                         case "position":
601                                 self._position(value);
602                                 break;
603                         case "resizable":
604                                 // currently resizable, becoming non-resizable
605                                 var isResizable = uiDialog.is( ":data(resizable)" );
606                                 if (isResizable && !value) {
607                                         uiDialog.resizable('destroy');
608                                 }
609
610                                 // currently resizable, changing handles
611                                 if (isResizable && typeof value === 'string') {
612                                         uiDialog.resizable('option', 'handles', value);
613                                 }
614
615                                 // currently non-resizable, becoming resizable
616                                 if (!isResizable && value !== false) {
617                                         self._makeResizable(value);
618                                 }
619                                 break;
620                         case "title":
621                                 // convert whatever was passed in o a string, for html() to not throw up
622                                 $(".ui-dialog-title", self.uiDialogTitlebar).html("" + (value || '&#160;'));
623                                 break;
624                 }
625
626                 $.Widget.prototype._setOption.apply(self, arguments);
627         },
628
629         _size: function() {
630                 /* If the user has resized the dialog, the .ui-dialog and .ui-dialog-content
631                  * divs will both have width and height set, so we need to reset them
632                  */
633                 var options = this.options,
634                         nonContentHeight,
635                         minContentHeight,
636                         isVisible = this.uiDialog.is( ":visible" );
637
638                 // reset content sizing
639                 this.element.show().css({
640                         width: 'auto',
641                         minHeight: 0,
642                         height: 0
643                 });
644
645                 if (options.minWidth > options.width) {
646                         options.width = options.minWidth;
647                 }
648
649                 // reset wrapper sizing
650                 // determine the height of all the non-content elements
651                 nonContentHeight = this.uiDialog.css({
652                                 height: 'auto',
653                                 width: options.width
654                         })
655                         .height();
656                 minContentHeight = Math.max( 0, options.minHeight - nonContentHeight );
657                 
658                 if ( options.height === "auto" ) {
659                         // only needed for IE6 support
660                         if ( $.support.minHeight ) {
661                                 this.element.css({
662                                         minHeight: minContentHeight,
663                                         height: "auto"
664                                 });
665                         } else {
666                                 this.uiDialog.show();
667                                 var autoHeight = this.element.css( "height", "auto" ).height();
668                                 if ( !isVisible ) {
669                                         this.uiDialog.hide();
670                                 }
671                                 this.element.height( Math.max( autoHeight, minContentHeight ) );
672                         }
673                 } else {
674                         this.element.height( Math.max( options.height - nonContentHeight, 0 ) );
675                 }
676
677                 if (this.uiDialog.is(':data(resizable)')) {
678                         this.uiDialog.resizable('option', 'minHeight', this._minHeight());
679                 }
680         }
681 });
682
683 $.extend($.ui.dialog, {
684         version: "1.8.10",
685
686         uuid: 0,
687         maxZ: 0,
688
689         getTitleId: function($el) {
690                 var id = $el.attr('id');
691                 if (!id) {
692                         this.uuid += 1;
693                         id = this.uuid;
694                 }
695                 return 'ui-dialog-title-' + id;
696         },
697
698         overlay: function(dialog) {
699                 this.$el = $.ui.dialog.overlay.create(dialog);
700         }
701 });
702
703 $.extend($.ui.dialog.overlay, {
704         instances: [],
705         // reuse old instances due to IE memory leak with alpha transparency (see #5185)
706         oldInstances: [],
707         maxZ: 0,
708         events: $.map('focus,mousedown,mouseup,keydown,keypress,click'.split(','),
709                 function(event) { return event + '.dialog-overlay'; }).join(' '),
710         create: function(dialog) {
711                 if (this.instances.length === 0) {
712                         // prevent use of anchors and inputs
713                         // we use a setTimeout in case the overlay is created from an
714                         // event that we're going to be cancelling (see #2804)
715                         setTimeout(function() {
716                                 // handle $(el).dialog().dialog('close') (see #4065)
717                                 if ($.ui.dialog.overlay.instances.length) {
718                                         $(document).bind($.ui.dialog.overlay.events, function(event) {
719                                                 // stop events if the z-index of the target is < the z-index of the overlay
720                                                 // we cannot return true when we don't want to cancel the event (#3523)
721                                                 if ($(event.target).zIndex() < $.ui.dialog.overlay.maxZ) {
722                                                         return false;
723                                                 }
724                                         });
725                                 }
726                         }, 1);
727
728                         // allow closing by pressing the escape key
729                         $(document).bind('keydown.dialog-overlay', function(event) {
730                                 if (dialog.options.closeOnEscape && event.keyCode &&
731                                         event.keyCode === $.ui.keyCode.ESCAPE) {
732                                         
733                                         dialog.close(event);
734                                         event.preventDefault();
735                                 }
736                         });
737
738                         // handle window resize
739                         $(window).bind('resize.dialog-overlay', $.ui.dialog.overlay.resize);
740                 }
741
742                 var $el = (this.oldInstances.pop() || $('<div></div>').addClass('ui-widget-overlay'))
743                         .appendTo(document.body)
744                         .css({
745                                 width: this.width(),
746                                 height: this.height()
747                         });
748
749                 if ($.fn.bgiframe) {
750                         $el.bgiframe();
751                 }
752
753                 this.instances.push($el);
754                 return $el;
755         },
756
757         destroy: function($el) {
758                 var indexOf = $.inArray($el, this.instances);
759                 if (indexOf != -1){
760                         this.oldInstances.push(this.instances.splice(indexOf, 1)[0]);
761                 }
762
763                 if (this.instances.length === 0) {
764                         $([document, window]).unbind('.dialog-overlay');
765                 }
766
767                 $el.remove();
768                 
769                 // adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
770                 var maxZ = 0;
771                 $.each(this.instances, function() {
772                         maxZ = Math.max(maxZ, this.css('z-index'));
773                 });
774                 this.maxZ = maxZ;
775         },
776
777         height: function() {
778                 var scrollHeight,
779                         offsetHeight;
780                 // handle IE 6
781                 if ($.browser.msie && $.browser.version < 7) {
782                         scrollHeight = Math.max(
783                                 document.documentElement.scrollHeight,
784                                 document.body.scrollHeight
785                         );
786                         offsetHeight = Math.max(
787                                 document.documentElement.offsetHeight,
788                                 document.body.offsetHeight
789                         );
790
791                         if (scrollHeight < offsetHeight) {
792                                 return $(window).height() + 'px';
793                         } else {
794                                 return scrollHeight + 'px';
795                         }
796                 // handle "good" browsers
797                 } else {
798                         return $(document).height() + 'px';
799                 }
800         },
801
802         width: function() {
803                 var scrollWidth,
804                         offsetWidth;
805                 // handle IE 6
806                 if ($.browser.msie && $.browser.version < 7) {
807                         scrollWidth = Math.max(
808                                 document.documentElement.scrollWidth,
809                                 document.body.scrollWidth
810                         );
811                         offsetWidth = Math.max(
812                                 document.documentElement.offsetWidth,
813                                 document.body.offsetWidth
814                         );
815
816                         if (scrollWidth < offsetWidth) {
817                                 return $(window).width() + 'px';
818                         } else {
819                                 return scrollWidth + 'px';
820                         }
821                 // handle "good" browsers
822                 } else {
823                         return $(document).width() + 'px';
824                 }
825         },
826
827         resize: function() {
828                 /* If the dialog is draggable and the user drags it past the
829                  * right edge of the window, the document becomes wider so we
830                  * need to stretch the overlay. If the user then drags the
831                  * dialog back to the left, the document will become narrower,
832                  * so we need to shrink the overlay to the appropriate size.
833                  * This is handled by shrinking the overlay before setting it
834                  * to the full document size.
835                  */
836                 var $overlays = $([]);
837                 $.each($.ui.dialog.overlay.instances, function() {
838                         $overlays = $overlays.add(this);
839                 });
840
841                 $overlays.css({
842                         width: 0,
843                         height: 0
844                 }).css({
845                         width: $.ui.dialog.overlay.width(),
846                         height: $.ui.dialog.overlay.height()
847                 });
848         }
849 });
850
851 $.extend($.ui.dialog.overlay.prototype, {
852         destroy: function() {
853                 $.ui.dialog.overlay.destroy(this.$el);
854         }
855 });
856
857 }(jQuery));