js/ui/jquery.ui.dialog.js

   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));