resources/jquery.ui/jquery.ui.dialog.js

   1 /*!
   2  * jQuery UI Dialog 1.8.24
   3  *
   4  * Copyright 2012, 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.isDefaultPrevented() && 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.scrollTop(), scrollLeft: self.element.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( "keydown.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                                         .click(function() {
 380                                                 props.click.apply(self.element[0], arguments);
 381                                         })
 382                                         .appendTo(uiButtonSet);
 383                                 // can't use .attr( props, true ) with jQuery 1.3.2.
 384                                 $.each( props, function( key, value ) {
 385                                         if ( key === "click" ) {
 386                                                 return;
 387                                         }
 388                                         if ( key in button ) {
 389                                                 button[ key ]( value );
 390                                         } else {
 391                                                 button.attr( key, value );
 392                                         }
 393                                 });
 394                                 if ($.fn.button) {
 395                                         button.button();
 396                                 }
 397                         });
 398                         uiDialogButtonPane.appendTo(self.uiDialog);
 399                 }
 400         },
 401
 402         _makeDraggable: function() {
 403                 var self = this,
 404                         options = self.options,
 405                         doc = $(document),
 406                         heightBeforeDrag;
 407
 408                 function filteredUi(ui) {
 409                         return {
 410                                 position: ui.position,
 411                                 offset: ui.offset
 412                         };
 413                 }
 414
 415                 self.uiDialog.draggable({
 416                         cancel: '.ui-dialog-content, .ui-dialog-titlebar-close',
 417                         handle: '.ui-dialog-titlebar',
 418                         containment: 'document',
 419                         start: function(event, ui) {
 420                                 heightBeforeDrag = options.height === "auto" ? "auto" : $(this).height();
 421                                 $(this).height($(this).height()).addClass("ui-dialog-dragging");
 422                                 self._trigger('dragStart', event, filteredUi(ui));
 423                         },
 424                         drag: function(event, ui) {
 425                                 self._trigger('drag', event, filteredUi(ui));
 426                         },
 427                         stop: function(event, ui) {
 428                                 options.position = [ui.position.left - doc.scrollLeft(),
 429                                         ui.position.top - doc.scrollTop()];
 430                                 $(this).removeClass("ui-dialog-dragging").height(heightBeforeDrag);
 431                                 self._trigger('dragStop', event, filteredUi(ui));
 432                                 $.ui.dialog.overlay.resize();
 433                         }
 434                 });
 435         },
 436
 437         _makeResizable: function(handles) {
 438                 handles = (handles === undefined ? this.options.resizable : handles);
 439                 var self = this,
 440                         options = self.options,
 441                         // .ui-resizable has position: relative defined in the stylesheet
 442                         // but dialogs have to use absolute or fixed positioning
 443                         position = self.uiDialog.css('position'),
 444                         resizeHandles = (typeof handles === 'string' ?
 445                                 handles :
 446                                 'n,e,s,w,se,sw,ne,nw'
 447                         );
 448
 449                 function filteredUi(ui) {
 450                         return {
 451                                 originalPosition: ui.originalPosition,
 452                                 originalSize: ui.originalSize,
 453                                 position: ui.position,
 454                                 size: ui.size
 455                         };
 456                 }
 457
 458                 self.uiDialog.resizable({
 459                         cancel: '.ui-dialog-content',
 460                         containment: 'document',
 461                         alsoResize: self.element,
 462                         maxWidth: options.maxWidth,
 463                         maxHeight: options.maxHeight,
 464                         minWidth: options.minWidth,
 465                         minHeight: self._minHeight(),
 466                         handles: resizeHandles,
 467                         start: function(event, ui) {
 468                                 $(this).addClass("ui-dialog-resizing");
 469                                 self._trigger('resizeStart', event, filteredUi(ui));
 470                         },
 471                         resize: function(event, ui) {
 472                                 self._trigger('resize', event, filteredUi(ui));
 473                         },
 474                         stop: function(event, ui) {
 475                                 $(this).removeClass("ui-dialog-resizing");
 476                                 options.height = $(this).height();
 477                                 options.width = $(this).width();
 478                                 self._trigger('resizeStop', event, filteredUi(ui));
 479                                 $.ui.dialog.overlay.resize();
 480                         }
 481                 })
 482                 .css('position', position)
 483                 .find('.ui-resizable-se').addClass('ui-icon ui-icon-grip-diagonal-se');
 484         },
 485
 486         _minHeight: function() {
 487                 var options = this.options;
 488
 489                 if (options.height === 'auto') {
 490                         return options.minHeight;
 491                 } else {
 492                         return Math.min(options.minHeight, options.height);
 493                 }
 494         },
 495
 496         _position: function(position) {
 497                 var myAt = [],
 498                         offset = [0, 0],
 499                         isVisible;
 500
 501                 if (position) {
 502                         // deep extending converts arrays to objects in jQuery <= 1.3.2 :-(
 503         //              if (typeof position == 'string' || $.isArray(position)) {
 504         //                      myAt = $.isArray(position) ? position : position.split(' ');
 505
 506                         if (typeof position === 'string' || (typeof position === 'object' && '0' in position)) {
 507                                 myAt = position.split ? position.split(' ') : [position[0], position[1]];
 508                                 if (myAt.length === 1) {
 509                                         myAt[1] = myAt[0];
 510                                 }
 511
 512                                 $.each(['left', 'top'], function(i, offsetPosition) {
 513                                         if (+myAt[i] === myAt[i]) {
 514                                                 offset[i] = myAt[i];
 515                                                 myAt[i] = offsetPosition;
 516                                         }
 517                                 });
 518
 519                                 position = {
 520                                         my: myAt.join(" "),
 521                                         at: myAt.join(" "),
 522                                         offset: offset.join(" ")
 523                                 };
 524                         }
 525
 526                         position = $.extend({}, $.ui.dialog.prototype.options.position, position);
 527                 } else {
 528                         position = $.ui.dialog.prototype.options.position;
 529                 }
 530
 531                 // need to show the dialog to get the actual offset in the position plugin
 532                 isVisible = this.uiDialog.is(':visible');
 533                 if (!isVisible) {
 534                         this.uiDialog.show();
 535                 }
 536                 this.uiDialog
 537                         // workaround for jQuery bug #5781 http://dev.jquery.com/ticket/5781
 538                         .css({ top: 0, left: 0 })
 539                         .position($.extend({ of: window }, position));
 540                 if (!isVisible) {
 541                         this.uiDialog.hide();
 542                 }
 543         },
 544
 545         _setOptions: function( options ) {
 546                 var self = this,
 547                         resizableOptions = {},
 548                         resize = false;
 549
 550                 $.each( options, function( key, value ) {
 551                         self._setOption( key, value );
 552
 553                         if ( key in sizeRelatedOptions ) {
 554                                 resize = true;
 555                         }
 556                         if ( key in resizableRelatedOptions ) {
 557                                 resizableOptions[ key ] = value;
 558                         }
 559                 });
 560
 561                 if ( resize ) {
 562                         this._size();
 563                 }
 564                 if ( this.uiDialog.is( ":data(resizable)" ) ) {
 565                         this.uiDialog.resizable( "option", resizableOptions );
 566                 }
 567         },
 568
 569         _setOption: function(key, value){
 570                 var self = this,
 571                         uiDialog = self.uiDialog;
 572
 573                 switch (key) {
 574                         //handling of deprecated beforeclose (vs beforeClose) option
 575                         //Ticket #4669 http://dev.jqueryui.com/ticket/4669
 576                         //TODO: remove in 1.9pre
 577                         case "beforeclose":
 578                                 key = "beforeClose";
 579                                 break;
 580                         case "buttons":
 581                                 self._createButtons(value);
 582                                 break;
 583                         case "closeText":
 584                                 // ensure that we always pass a string
 585                                 self.uiDialogTitlebarCloseText.text("" + value);
 586                                 break;
 587                         case "dialogClass":
 588                                 uiDialog
 589                                         .removeClass(self.options.dialogClass)
 590                                         .addClass(uiDialogClasses + value);
 591                                 break;
 592                         case "disabled":
 593                                 if (value) {
 594                                         uiDialog.addClass('ui-dialog-disabled');
 595                                 } else {
 596                                         uiDialog.removeClass('ui-dialog-disabled');
 597                                 }
 598                                 break;
 599                         case "draggable":
 600                                 var isDraggable = uiDialog.is( ":data(draggable)" );
 601                                 if ( isDraggable && !value ) {
 602                                         uiDialog.draggable( "destroy" );
 603                                 }
 604
 605                                 if ( !isDraggable && value ) {
 606                                         self._makeDraggable();
 607                                 }
 608                                 break;
 609                         case "position":
 610                                 self._position(value);
 611                                 break;
 612                         case "resizable":
 613                                 // currently resizable, becoming non-resizable
 614                                 var isResizable = uiDialog.is( ":data(resizable)" );
 615                                 if (isResizable && !value) {
 616                                         uiDialog.resizable('destroy');
 617                                 }
 618
 619                                 // currently resizable, changing handles
 620                                 if (isResizable && typeof value === 'string') {
 621                                         uiDialog.resizable('option', 'handles', value);
 622                                 }
 623
 624                                 // currently non-resizable, becoming resizable
 625                                 if (!isResizable && value !== false) {
 626                                         self._makeResizable(value);
 627                                 }
 628                                 break;
 629                         case "title":
 630                                 // convert whatever was passed in o a string, for html() to not throw up
 631                                 $(".ui-dialog-title", self.uiDialogTitlebar).html("" + (value || '&#160;'));
 632                                 break;
 633                 }
 634
 635                 $.Widget.prototype._setOption.apply(self, arguments);
 636         },
 637
 638         _size: function() {
 639                 /* If the user has resized the dialog, the .ui-dialog and .ui-dialog-content
 640                  * divs will both have width and height set, so we need to reset them
 641                  */
 642                 var options = this.options,
 643                         nonContentHeight,
 644                         minContentHeight,
 645                         isVisible = this.uiDialog.is( ":visible" );
 646
 647                 // reset content sizing
 648                 this.element.show().css({
 649                         width: 'auto',
 650                         minHeight: 0,
 651                         height: 0
 652                 });
 653
 654                 if (options.minWidth > options.width) {
 655                         options.width = options.minWidth;
 656                 }
 657
 658                 // reset wrapper sizing
 659                 // determine the height of all the non-content elements
 660                 nonContentHeight = this.uiDialog.css({
 661                                 height: 'auto',
 662                                 width: options.width
 663                         })
 664                         .height();
 665                 minContentHeight = Math.max( 0, options.minHeight - nonContentHeight );
 666
 667                 if ( options.height === "auto" ) {
 668                         // only needed for IE6 support
 669                         if ( $.support.minHeight ) {
 670                                 this.element.css({
 671                                         minHeight: minContentHeight,
 672                                         height: "auto"
 673                                 });
 674                         } else {
 675                                 this.uiDialog.show();
 676                                 var autoHeight = this.element.css( "height", "auto" ).height();
 677                                 if ( !isVisible ) {
 678                                         this.uiDialog.hide();
 679                                 }
 680                                 this.element.height( Math.max( autoHeight, minContentHeight ) );
 681                         }
 682                 } else {
 683                         this.element.height( Math.max( options.height - nonContentHeight, 0 ) );
 684                 }
 685
 686                 if (this.uiDialog.is(':data(resizable)')) {
 687                         this.uiDialog.resizable('option', 'minHeight', this._minHeight());
 688                 }
 689         }
 690 });
 691
 692 $.extend($.ui.dialog, {
 693         version: "1.8.24",
 694
 695         uuid: 0,
 696         maxZ: 0,
 697
 698         getTitleId: function($el) {
 699                 var id = $el.attr('id');
 700                 if (!id) {
 701                         this.uuid += 1;
 702                         id = this.uuid;
 703                 }
 704                 return 'ui-dialog-title-' + id;
 705         },
 706
 707         overlay: function(dialog) {
 708                 this.$el = $.ui.dialog.overlay.create(dialog);
 709         }
 710 });
 711
 712 $.extend($.ui.dialog.overlay, {
 713         instances: [],
 714         // reuse old instances due to IE memory leak with alpha transparency (see #5185)
 715         oldInstances: [],
 716         maxZ: 0,
 717         events: $.map('focus,mousedown,mouseup,keydown,keypress,click'.split(','),
 718                 function(event) { return event + '.dialog-overlay'; }).join(' '),
 719         create: function(dialog) {
 720                 if (this.instances.length === 0) {
 721                         // prevent use of anchors and inputs
 722                         // we use a setTimeout in case the overlay is created from an
 723                         // event that we're going to be cancelling (see #2804)
 724                         setTimeout(function() {
 725                                 // handle $(el).dialog().dialog('close') (see #4065)
 726                                 if ($.ui.dialog.overlay.instances.length) {
 727                                         $(document).bind($.ui.dialog.overlay.events, function(event) {
 728                                                 // stop events if the z-index of the target is < the z-index of the overlay
 729                                                 // we cannot return true when we don't want to cancel the event (#3523)
 730                                                 if ($(event.target).zIndex() < $.ui.dialog.overlay.maxZ) {
 731                                                         return false;
 732                                                 }
 733                                         });
 734                                 }
 735                         }, 1);
 736
 737                         // allow closing by pressing the escape key
 738                         $(document).bind('keydown.dialog-overlay', function(event) {
 739                                 if (dialog.options.closeOnEscape && !event.isDefaultPrevented() && event.keyCode &&
 740                                         event.keyCode === $.ui.keyCode.ESCAPE) {
 741
 742                                         dialog.close(event);
 743                                         event.preventDefault();
 744                                 }
 745                         });
 746
 747                         // handle window resize
 748                         $(window).bind('resize.dialog-overlay', $.ui.dialog.overlay.resize);
 749                 }
 750
 751                 var $el = (this.oldInstances.pop() || $('<div></div>').addClass('ui-widget-overlay'))
 752                         .appendTo(document.body)
 753                         .css({
 754                                 width: this.width(),
 755                                 height: this.height()
 756                         });
 757
 758                 if ($.fn.bgiframe) {
 759                         $el.bgiframe();
 760                 }
 761
 762                 this.instances.push($el);
 763                 return $el;
 764         },
 765
 766         destroy: function($el) {
 767                 var indexOf = $.inArray($el, this.instances);
 768                 if (indexOf != -1){
 769                         this.oldInstances.push(this.instances.splice(indexOf, 1)[0]);
 770                 }
 771
 772                 if (this.instances.length === 0) {
 773                         $([document, window]).unbind('.dialog-overlay');
 774                 }
 775
 776                 $el.remove();
 777
 778                 // adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
 779                 var maxZ = 0;
 780                 $.each(this.instances, function() {
 781                         maxZ = Math.max(maxZ, this.css('z-index'));
 782                 });
 783                 this.maxZ = maxZ;
 784         },
 785
 786         height: function() {
 787                 var scrollHeight,
 788                         offsetHeight;
 789                 // handle IE 6
 790                 if ($.browser.msie && $.browser.version < 7) {
 791                         scrollHeight = Math.max(
 792                                 document.documentElement.scrollHeight,
 793                                 document.body.scrollHeight
 794                         );
 795                         offsetHeight = Math.max(
 796                                 document.documentElement.offsetHeight,
 797                                 document.body.offsetHeight
 798                         );
 799
 800                         if (scrollHeight < offsetHeight) {
 801                                 return $(window).height() + 'px';
 802                         } else {
 803                                 return scrollHeight + 'px';
 804                         }
 805                 // handle "good" browsers
 806                 } else {
 807                         return $(document).height() + 'px';
 808                 }
 809         },
 810
 811         width: function() {
 812                 var scrollWidth,
 813                         offsetWidth;
 814                 // handle IE
 815                 if ( $.browser.msie ) {
 816                         scrollWidth = Math.max(
 817                                 document.documentElement.scrollWidth,
 818                                 document.body.scrollWidth
 819                         );
 820                         offsetWidth = Math.max(
 821                                 document.documentElement.offsetWidth,
 822                                 document.body.offsetWidth
 823                         );
 824
 825                         if (scrollWidth < offsetWidth) {
 826                                 return $(window).width() + 'px';
 827                         } else {
 828                                 return scrollWidth + 'px';
 829                         }
 830                 // handle "good" browsers
 831                 } else {
 832                         return $(document).width() + 'px';
 833                 }
 834         },
 835
 836         resize: function() {
 837                 /* If the dialog is draggable and the user drags it past the
 838                  * right edge of the window, the document becomes wider so we
 839                  * need to stretch the overlay. If the user then drags the
 840                  * dialog back to the left, the document will become narrower,
 841                  * so we need to shrink the overlay to the appropriate size.
 842                  * This is handled by shrinking the overlay before setting it
 843                  * to the full document size.
 844                  */
 845                 var $overlays = $([]);
 846                 $.each($.ui.dialog.overlay.instances, function() {
 847                         $overlays = $overlays.add(this);
 848                 });
 849
 850                 $overlays.css({
 851                         width: 0,
 852                         height: 0
 853                 }).css({
 854                         width: $.ui.dialog.overlay.width(),
 855                         height: $.ui.dialog.overlay.height()
 856                 });
 857         }
 858 });
 859
 860 $.extend($.ui.dialog.overlay.prototype, {
 861         destroy: function() {
 862                 $.ui.dialog.overlay.destroy(this.$el);
 863         }
 864 });
 865
 866 }(jQuery));