From 3829a37ca122e923c3a08b964c4b1a946a2a1456 Mon Sep 17 00:00:00 2001
From: Nate Eagle <nate.eagle@teamaol.com>
Date: Mon, 15 Oct 2012 16:12:21 -0400
Subject: [PATCH] Dialog: Awesome new stacking and overlay implementation.
 Fixes the following tickets:

Fixes #3534 - Dialog: Modal dialog disables all input elements on page.
Fixes #4671 - Dialog: Modal Dialog disables vertical scroll bar in Chrome & Safari.
Fixes #4995 - Dialog: Modal Dialog's overlay dissapears in IE when content is tall.
Fixes #5388 - Dialog: Don't change z-index when already at the top.
Fixes #5466 - Dialog: "modal" Dialog Incorrectly Cancels Input Events.
Fixes #5762 - Dialog: Get rid of z-index workaround, document it instead.
Fixes #6267 - Dialog: checkboxes that inherit a z-index < jqueryui.dialog z-index don't work.
Fixes #7051 - Dialog: modal prevents tab key from moving focus off slider handle.
Fixes #7107 - Dialog: Modal dialog event loss with high zindex child elements (FF 3.6).
Fixes #7120 - Dialog: Modal operation interrupts drag drop marker functionality on gmaps.
Fixes #8172 - Dialog: Change event cancelled when opening modal dialog from another modal dialog.
Fixes #8583 - Dialog: Mouse event wrongly stopped.
Fixes #8722 - Dialog: Remove stack option.
Fixes #8729 - Dialog: Remove zIndex option.
---
 tests/unit/dialog/dialog.html            |   3 +-
 tests/unit/dialog/dialog_common.js       |   1 -
 tests/unit/dialog/dialog_methods.js      |  42 +++--
 tests/unit/dialog/dialog_tickets.js      |  79 +--------
 tests/visual/dialog/complex-dialogs.html |  89 ++++++++++
 themes/base/jquery.ui.core.css           |   4 +-
 themes/base/jquery.ui.dialog.css         |   2 +-
 ui/jquery.ui.dialog.js                   | 209 ++---------------------
 8 files changed, 138 insertions(+), 291 deletions(-)
 create mode 100644 tests/visual/dialog/complex-dialogs.html

diff --git a/tests/unit/dialog/dialog.html b/tests/unit/dialog/dialog.html
index d804807f2..5a7fc8fe5 100644
--- a/tests/unit/dialog/dialog.html
+++ b/tests/unit/dialog/dialog.html
@@ -52,7 +52,8 @@
 <h2 id="qunit-userAgent"></h2>
 <ol id="qunit-tests"></ol>
 <div id="qunit-fixture">
-
+	<div id="dialog1"></div>
+	<div id="dialog2"></div>
 </div>
 </body>
 </html>
diff --git a/tests/unit/dialog/dialog_common.js b/tests/unit/dialog/dialog_common.js
index 623908da7..d49f78a4b 100644
--- a/tests/unit/dialog/dialog_common.js
+++ b/tests/unit/dialog/dialog_common.js
@@ -26,7 +26,6 @@ TestHelpers.commonWidgetTests( "dialog", {
 		stack: true,
 		title: '',
 		width: 300,
-		zIndex: 1000,
 
 		// callbacks
 		create: null
diff --git a/tests/unit/dialog/dialog_methods.js b/tests/unit/dialog/dialog_methods.js
index 3c80a9bea..e7b2fc710 100644
--- a/tests/unit/dialog/dialog_methods.js
+++ b/tests/unit/dialog/dialog_methods.js
@@ -106,24 +106,30 @@ test("isOpen", function() {
 });
 
 test("moveToTop", function() {
-	expect( 3 );
-
-	var d1, d2, dlg1, dlg2,
-		expected = $('<div></div>').dialog(),
-		actual = expected.dialog('moveToTop');
-	equal(actual, expected, 'moveToTop is chainable');
-
-	d1 = $('<div></div>').dialog();
-	dlg1 = d1.parents('.ui-dialog');
-	d1.dialog('close');
-	d1.dialog('open');
-	d2 = $('<div></div>').dialog();
-	dlg2 = d2.parents('.ui-dialog');
-	d2.dialog('close');
-	d2.dialog('open');
-	ok(dlg1.css('zIndex') < dlg2.css('zIndex'), 'dialog 1 under dialog 2 before moveToTop method called');
-	d1.dialog('moveToTop');
-	ok(dlg1.css('zIndex') > dlg2.css('zIndex'), 'dialog 1 above dialog 2 after moveToTop method called');
+	expect( 5 );
+	function order() {
+		var actual = $( ".ui-dialog" ).map(function() {
+			return +$( this ).find( ".ui-dialog-content" ).attr( "id" ).replace( /\D+/, "" );
+		}).get().reverse();
+		deepEqual( actual, $.makeArray( arguments ) );
+	}
+	var dialog1, dialog2,
+		focusOn = "dialog1";
+	dialog1 = $( "#dialog1" ).dialog({
+		focus: function() {
+			equal( focusOn, "dialog1" );
+		}
+	});
+	focusOn = "dialog2";
+	dialog2 = $( "#dialog2" ).dialog({
+		focus: function() {
+			equal( focusOn, "dialog2" );
+		}
+	});
+	order( 2, 1 );
+	focusOn = "dialog1";
+	dialog1.dialog( "moveToTop" );
+	order( 1, 2 );
 });
 
 test("open", function() {
diff --git a/tests/unit/dialog/dialog_tickets.js b/tests/unit/dialog/dialog_tickets.js
index cf4ab0219..2b0214718 100644
--- a/tests/unit/dialog/dialog_tickets.js
+++ b/tests/unit/dialog/dialog_tickets.js
@@ -99,10 +99,10 @@ test("#6137: dialog('open') causes form elements to reset on IE7", function() {
 				'<input type="radio" name="radio" id="b" value="b">b</input></form>').appendTo( "body" ).dialog({autoOpen: false});
 
 	d1.find('#b').prop( "checked", true );
-	equal($('input:checked').val(), 'b', "checkbox b is checked");
+	equal(d1.find('input:checked').val(), 'b', "checkbox b is checked");
 
 	d1.dialog('open');
-	equal($('input:checked').val(), 'b', "checkbox b is checked");
+	equal(d1.find('input:checked').val(), 'b', "checkbox b is checked");
 
 	d1.remove();
 });
@@ -117,81 +117,6 @@ test("#6645: Missing element not found check in overlay", function(){
     d1.add(d2).remove();
 });
 
-test("#6966: Escape key closes all dialogs, not the top one", function(){
-	expect(24);
-    // test with close function removing dialog triggered through the overlay
-    d1 = $('<div title="dialog 1">Dialog 1</div>').dialog({modal: true, close: function(){ d1.remove(); }});
-    d2 = $('<div title="dialog 2">Dialog 2</div>').dialog({modal: true, close: function(){ d2.remove(); }});
-
-    ok(d1.data('dialog') && d1.dialog('isOpen'), 'first dialog is open');
-    ok(d2.data('dialog') && d2.dialog('isOpen'), 'second dialog is open');
-
-    $( document ).simulate('keydown', {keyCode: $.ui.keyCode.ESCAPE});
-    ok(d1.data('dialog') && d1.dialog('isOpen'), 'first dialog still open');
-    ok(!d2.data('dialog'), 'second dialog is closed');
-
-    $( document ).simulate('keydown', {keyCode: $.ui.keyCode.ESCAPE});
-    ok(!d1.data('dialog'), 'first dialog is closed');
-    ok(!d2.data('dialog'), 'second dialog is closed');
-
-    d2.remove();
-    d1.remove();
-
-	// test with close function removing dialog triggered through the dialog
-    d1 = $('<div title="dialog 1">Dialog 1</div>').dialog({modal: true, close: function(){ d1.remove(); }});
-    d2 = $('<div title="dialog 2">Dialog 2</div>').dialog({modal: true, close: function(){ d2.remove(); }});
-
-    ok(d1.data('dialog') && d1.dialog('isOpen'), 'first dialog is open');
-    ok(d2.data('dialog') && d2.dialog('isOpen'), 'second dialog is open');
-
-    d2.simulate('keydown', {keyCode: $.ui.keyCode.ESCAPE});
-    ok(d1.data('dialog') && d1.dialog('isOpen'), 'first dialog still open');
-    ok(!d2.data('dialog'), 'second dialog is closed');
-
-    d1.simulate('keydown', {keyCode: $.ui.keyCode.ESCAPE});
-    ok(!d1.data('dialog'), 'first dialog is closed');
-    ok(!d2.data('dialog'), 'second dialog is closed');
-
-    d2.remove();
-    d1.remove();
-
-    // test without close function removing dialog
-    d1 = $('<div title="dialog 1">Dialog 1</div>').dialog({modal: true});
-    d2 = $('<div title="dialog 2">Dialog 2</div>').dialog({modal: true});
-
-    ok(d1.dialog("isOpen"), 'first dialog is open');
-    ok(d2.dialog("isOpen"), 'second dialog is open');
-
-    d2.simulate("keydown", {keyCode: $.ui.keyCode.ESCAPE});
-    ok(d1.dialog("isOpen"), 'first dialog still open');
-    ok(!d2.dialog("isOpen"), 'second dialog is closed');
-
-    d1.simulate("keydown", {keyCode: $.ui.keyCode.ESCAPE});
-    ok(!d1.dialog("isOpen"), 'first dialog is closed');
-    ok(!d2.dialog("isOpen"), 'second dialog is closed');
-
-    d2.remove();
-    d1.remove();
-
-    // test without close function removing dialog triggered through the overlay
-    d1 = $('<div title="dialog 1">Dialog 1</div>').dialog({modal: true});
-    d2 = $('<div title="dialog 2">Dialog 2</div>').dialog({modal: true});
-
-    ok(d1.dialog("isOpen"), 'first dialog is open');
-    ok(d2.dialog("isOpen"), 'second dialog is open');
-
-    $( document ).simulate("keydown", {keyCode: $.ui.keyCode.ESCAPE});
-    ok(d1.dialog("isOpen"), 'first dialog still open');
-    ok(!d2.dialog("isOpen"), 'second dialog is closed');
-
-    $( document ).simulate("keydown", {keyCode: $.ui.keyCode.ESCAPE});
-    ok(!d1.dialog("isOpen"), 'first dialog is closed');
-    ok(!d2.dialog("isOpen"), 'second dialog is closed');
-
-    d2.remove();
-    d1.remove();
-});
-
 test("#4980: Destroy should place element back in original DOM position", function(){
     expect( 2 );
     container = $('<div id="container"><div id="modal">Content</div></div>');
diff --git a/tests/visual/dialog/complex-dialogs.html b/tests/visual/dialog/complex-dialogs.html
new file mode 100644
index 000000000..556336d00
--- /dev/null
+++ b/tests/visual/dialog/complex-dialogs.html
@@ -0,0 +1,89 @@
+<!doctype html>
+<html lang="en">
+<head>
+	<meta charset="utf-8">
+	<title>Dialog Visual Test</title>
+	<link rel="stylesheet" href="../../../themes/base/jquery.ui.all.css">
+	<script src="../../../jquery-1.8.2.js"></script>
+	<script src="../../../external/jquery.bgiframe-2.1.2.js"></script>
+	<script src="../../../ui/jquery.ui.core.js"></script>
+	<script src="../../../ui/jquery.ui.widget.js"></script>
+	<script src="../../../ui/jquery.ui.mouse.js"></script>
+	<script src="../../../ui/jquery.ui.draggable.js"></script>
+	<script src="../../../ui/jquery.ui.position.js"></script>
+	<script src="../../../ui/jquery.ui.resizable.js"></script>
+	<script src="../../../ui/jquery.ui.dialog.js"></script>
+
+	<!-- stuff needed to make things complex -->
+	<script src="../../../ui/jquery.ui.datepicker.js"></script>
+	<script src="../../../ui/jquery.ui.menu.js"></script>
+	<script src="../../../ui/jquery.ui.autocomplete.js"></script>
+	<script src="../../../ui/jquery.ui.tooltip.js"></script>
+
+	<script>
+	$(function() {
+		$( "#dialog" ).dialog({
+			modal: true,
+			height: 300,
+			width: 500
+		});
+
+		var datepickerDialog = $( "#dialog-datepicker" ).dialog({
+				autoOpen: false,
+				modal: true,
+			}),
+
+			autocompleteDialog = $( "#dialog-autocomplete" ).dialog({
+				autoOpen: false,
+				modal: false,
+				width: 600
+			});
+
+		$( "#open-datepicker" ).click(function() {
+			datepickerDialog.dialog( "open" );
+		});
+
+		$( "#open-autocomplete" ).click(function() {
+			autocompleteDialog.dialog( "open" );
+		});
+
+		$( "#datepicker" ).datepicker();
+
+		$( "#autocomplete" ).autocomplete({
+			source: [
+				"ActionScript",
+				"AppleScript",
+				"Asp",
+				"BASIC",
+				"Scheme"
+			]
+		});
+
+		$( document ).tooltip();
+	});
+	</script>
+</head>
+<body>
+
+<p>WHAT: A modal dialog opening another modal dialog (including a datepicker), opening a non-modal dialog (including an autocomplete with tooltip applied). A regular link on the page, outside of the dialogs.</p>
+<p>EXPECTED: As long as a modal dialog is open, focus stays within the dialogs. Both mouse and keyboard interactions are captured and restricted to the dialog. When the nested modal dialog is open, the first modal dialog can't be interacted with, until the nested dialog is closed. When the third dialog is open (not modal), switching between the two dialogs is possible, both can be interacted with.</p>
+
+<a href="#">Outside link</a>
+
+<div id="dialog" title="Basic dialog">
+	<p>This is the default dialog which is useful for displaying information. The dialog window can be moved, resized and closed with the 'x' icon.</p>
+	<p><button id="open-datepicker">Open another window with a datepicker.</button></p>
+</div>
+
+<div id="dialog-datepicker" title="A dialog with a datepicker">
+	<p>Date: <input id="datepicker"></p>
+	<p><button id="open-autocomplete">Open another window with an autocomplete and a tooltip.</button></p>
+</div>
+
+<div id="dialog-autocomplete">
+	<label for="autocomplete">Tags: </label>
+	<input id="autocomplete" title="Try typing something!">
+</div>
+
+</body>
+</html>
diff --git a/themes/base/jquery.ui.core.css b/themes/base/jquery.ui.core.css
index 8cf4d02ef..b94c043da 100644
--- a/themes/base/jquery.ui.core.css
+++ b/themes/base/jquery.ui.core.css
@@ -19,6 +19,8 @@
 .ui-helper-clearfix { zoom: 1; }
 .ui-helper-zfix { width: 100%; height: 100%; top: 0; left: 0; position: absolute; opacity: 0; filter:Alpha(Opacity=0); }
 
+.ui-front { z-index: 100; }
+
 
 /* Interaction Cues
 ----------------------------------*/
@@ -36,4 +38,4 @@
 ----------------------------------*/
 
 /* Overlays */
-.ui-widget-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; }
+.ui-widget-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; }
diff --git a/themes/base/jquery.ui.dialog.css b/themes/base/jquery.ui.dialog.css
index 2937af9b7..4c54829e2 100644
--- a/themes/base/jquery.ui.dialog.css
+++ b/themes/base/jquery.ui.dialog.css
@@ -8,7 +8,7 @@
  *
  * http://docs.jquery.com/UI/Dialog#theming
  */
-.ui-dialog { position: absolute; padding: .2em; width: 300px; overflow: hidden; }
+.ui-dialog { position: absolute; padding: .2em; width: 300px; overflow: hidden; outline: 0; }
 .ui-dialog .ui-dialog-titlebar { padding: .4em 1em; position: relative;  }
 .ui-dialog .ui-dialog-title { float: left; margin: .1em 16px .1em 0; }
 .ui-dialog .ui-dialog-titlebar-close { position: absolute; right: .3em; top: 50%; width: 19px; margin: -10px 0 0 0; padding: 1px; height: 18px; }
diff --git a/ui/jquery.ui.dialog.js b/ui/jquery.ui.dialog.js
index c1ac7bc9e..93a49cfd6 100644
--- a/ui/jquery.ui.dialog.js
+++ b/ui/jquery.ui.dialog.js
@@ -19,7 +19,7 @@
  */
 (function( $, undefined ) {
 
-var uiDialogClasses = "ui-dialog ui-widget ui-widget-content ui-corner-all ",
+var uiDialogClasses = "ui-dialog ui-widget ui-widget-content ui-corner-all ui-front ",
 	sizeRelatedOptions = {
 		buttons: true,
 		height: true,
@@ -67,10 +67,8 @@ $.widget("ui.dialog", {
 		},
 		resizable: true,
 		show: null,
-		stack: true,
 		title: "",
-		width: 300,
-		zIndex: 1000
+		width: 300
 	},
 
 	_create: function() {
@@ -96,11 +94,7 @@ $.widget("ui.dialog", {
 
 			uiDialog = ( this.uiDialog = $( "<div>" ) )
 				.addClass( uiDialogClasses + options.dialogClass )
-				.css({
-					display: "none",
-					outline: 0, // TODO: move to stylesheet
-					zIndex: options.zIndex
-				})
+				.hide()
 				// setting tabIndex makes the div focusable
 				.attr( "tabIndex", -1)
 				.keydown(function( event ) {
@@ -111,9 +105,9 @@ $.widget("ui.dialog", {
 					}
 				})
 				.mousedown(function( event ) {
-					that.moveToTop( false, event );
+					that.moveToTop( event );
 				})
-				.appendTo( "body" );
+				.appendTo( this.document[ 0 ].body );
 
 			this.element
 				.show()
@@ -238,8 +232,7 @@ $.widget("ui.dialog", {
 	},
 
 	close: function( event ) {
-		var that = this,
-			maxZ, thisZ;
+		var that = this;
 
 		if ( !this._isOpen ) {
 			return;
@@ -264,22 +257,6 @@ $.widget("ui.dialog", {
 			this._trigger( "close", event );
 		}
 
-		$.ui.dialog.overlay.resize();
-
-		// adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
-		if ( this.options.modal ) {
-			maxZ = 0;
-			$( ".ui-dialog" ).each(function() {
-				if ( this !== that.uiDialog[0] ) {
-					thisZ = $( this ).css( "z-index" );
-					if ( !isNaN( thisZ ) ) {
-						maxZ = Math.max( maxZ, thisZ );
-					}
-				}
-			});
-			$.ui.dialog.maxZ = maxZ;
-		}
-
 		return this;
 	},
 
@@ -287,39 +264,11 @@ $.widget("ui.dialog", {
 		return this._isOpen;
 	},
 
-	// the force parameter allows us to move modal dialogs to their correct
-	// position on open
-	moveToTop: function( force, event ) {
-		var options = this.options,
-			saveScroll;
-
-		if ( ( options.modal && !force ) ||
-				( !options.stack && !options.modal ) ) {
-			return this._trigger( "focus", event );
-		}
-
-		if ( options.zIndex > $.ui.dialog.maxZ ) {
-			$.ui.dialog.maxZ = options.zIndex;
-		}
-		if ( this.overlay ) {
-			$.ui.dialog.maxZ += 1;
-			$.ui.dialog.overlay.maxZ = $.ui.dialog.maxZ;
-			this.overlay.$el.css( "z-index", $.ui.dialog.overlay.maxZ );
+	moveToTop: function( event, silent ) {
+		var moved = this.uiDialog.nextAll( ":visible" ).insertBefore( this.uiDialog );
+		if ( !silent && moved.length ) {
+			this._trigger( "focus", event );
 		}
-
-		// Save and then restore scroll
-		// Opera 9.5+ resets when parent z-index is changed.
-		// http://bugs.jqueryui.com/ticket/3193
-		saveScroll = {
-			scrollTop: this.element.scrollTop(),
-			scrollLeft: this.element.scrollLeft()
-		};
-		$.ui.dialog.maxZ += 1;
-		this.uiDialog.css( "z-index", $.ui.dialog.maxZ );
-		this.element.attr( saveScroll );
-		this._trigger( "focus", event );
-
-		return this;
 	},
 
 	open: function() {
@@ -335,7 +284,8 @@ $.widget("ui.dialog", {
 		this._position( options.position );
 		uiDialog.show( options.show );
 		this.overlay = options.modal ? new $.ui.dialog.overlay( this ) : null;
-		this.moveToTop( true );
+
+		this.moveToTop( null, true );
 
 		// set focus to the first tabbable element in the content area or the first button
 		// if there are no tabbable elements, set focus on the dialog itself
@@ -350,6 +300,7 @@ $.widget("ui.dialog", {
 
 		this._isOpen = true;
 		this._trigger( "open" );
+		this._trigger( "focus" );
 
 		return this;
 	},
@@ -421,7 +372,6 @@ $.widget("ui.dialog", {
 				$( this )
 					.removeClass( "ui-dialog-dragging" );
 				that._trigger( "dragStop", event, filteredUi( ui ) );
-				$.ui.dialog.overlay.resize();
 			}
 		});
 	},
@@ -467,7 +417,6 @@ $.widget("ui.dialog", {
 				options.height = $( this ).height();
 				options.width = $( this ).width();
 				that._trigger( "resizeStop", event, filteredUi( ui ) );
-				$.ui.dialog.overlay.resize();
 			}
 		})
 		.css( "position", position )
@@ -674,7 +623,6 @@ $.widget("ui.dialog", {
 
 $.extend($.ui.dialog, {
 	uuid: 0,
-	maxZ: 0,
 
 	getTitleId: function($el) {
 		var id = $el.attr( "id" );
@@ -694,54 +642,11 @@ $.extend( $.ui.dialog.overlay, {
 	instances: [],
 	// reuse old instances due to IE memory leak with alpha transparency (see #5185)
 	oldInstances: [],
-	maxZ: 0,
-	events: $.map(
-		"focus,mousedown,mouseup,keydown,keypress,click".split( "," ),
-		function( event ) {
-			return event + ".dialog-overlay";
-		}
-	).join( " " ),
 	create: function( dialog ) {
-		if ( this.instances.length === 0 ) {
-			// prevent use of anchors and inputs
-			// we use a setTimeout in case the overlay is created from an
-			// event that we're going to be cancelling (see #2804)
-			setTimeout(function() {
-				// handle $(el).dialog().dialog('close') (see #4065)
-				if ( $.ui.dialog.overlay.instances.length ) {
-					$( document ).bind( $.ui.dialog.overlay.events, function( event ) {
-						// stop events if the z-index of the target is < the z-index of the overlay
-						// we cannot return true when we don't want to cancel the event (#3523)
-						if ( $( event.target ).zIndex() < $.ui.dialog.overlay.maxZ ) {
-							return false;
-						}
-					});
-				}
-			}, 1 );
-
-			// handle window resize
-			$( window ).bind( "resize.dialog-overlay", $.ui.dialog.overlay.resize );
-		}
 
-		var $el = ( this.oldInstances.pop() || $( "<div>" ).addClass( "ui-widget-overlay" ) );
+		var $el = ( this.oldInstances.pop() || $( "<div>" ).addClass( "ui-widget-overlay ui-front" ) );
 
-		// allow closing by pressing the escape key
-		$( document ).bind( "keydown.dialog-overlay", function( event ) {
-			var instances = $.ui.dialog.overlay.instances;
-			// only react to the event if we're the top overlay
-			if ( instances.length !== 0 && instances[ instances.length - 1 ] === $el &&
-				dialog.options.closeOnEscape && !event.isDefaultPrevented() && event.keyCode &&
-				event.keyCode === $.ui.keyCode.ESCAPE ) {
-
-				dialog.close( event );
-				event.preventDefault();
-			}
-		});
-
-		$el.appendTo( document.body ).css({
-			width: this.width(),
-			height: this.height()
-		});
+		$el.appendTo( document.body );
 
 		if ( $.fn.bgiframe ) {
 			$el.bgiframe();
@@ -752,8 +657,7 @@ $.extend( $.ui.dialog.overlay, {
 	},
 
 	destroy: function( $el ) {
-		var indexOf = $.inArray( $el, this.instances ),
-			maxZ = 0;
+		var indexOf = $.inArray( $el, this.instances );
 
 		if ( indexOf !== -1 ) {
 			this.oldInstances.push( this.instances.splice( indexOf, 1 )[ 0 ] );
@@ -763,86 +667,7 @@ $.extend( $.ui.dialog.overlay, {
 			$( [ document, window ] ).unbind( ".dialog-overlay" );
 		}
 
-		$el.height( 0 ).width( 0 ).remove();
-
-		// adjust the maxZ to allow other modal dialogs to continue to work (see #4309)
-		$.each( this.instances, function() {
-			maxZ = Math.max( maxZ, this.css( "z-index" ) );
-		});
-		this.maxZ = maxZ;
-	},
-
-	height: function() {
-		var scrollHeight,
-			offsetHeight;
-		// handle IE
-		if ( $.ui.ie ) {
-			scrollHeight = Math.max(
-				document.documentElement.scrollHeight,
-				document.body.scrollHeight
-			);
-			offsetHeight = Math.max(
-				document.documentElement.offsetHeight,
-				document.body.offsetHeight
-			);
-
-			if ( scrollHeight < offsetHeight ) {
-				return $( window ).height() + "px";
-			} else {
-				return scrollHeight + "px";
-			}
-		// handle "good" browsers
-		} else {
-			return $( document ).height() + "px";
-		}
-	},
-
-	width: function() {
-		var scrollWidth,
-			offsetWidth;
-		// handle IE
-		if ( $.ui.ie ) {
-			scrollWidth = Math.max(
-				document.documentElement.scrollWidth,
-				document.body.scrollWidth
-			);
-			offsetWidth = Math.max(
-				document.documentElement.offsetWidth,
-				document.body.offsetWidth
-			);
-
-			if ( scrollWidth < offsetWidth ) {
-				return $( window ).width() + "px";
-			} else {
-				return scrollWidth + "px";
-			}
-		// handle "good" browsers
-		} else {
-			return $( document ).width() + "px";
-		}
-	},
-
-	resize: function() {
-		/* If the dialog is draggable and the user drags it past the
-		 * right edge of the window, the document becomes wider so we
-		 * need to stretch the overlay. If the user then drags the
-		 * dialog back to the left, the document will become narrower,
-		 * so we need to shrink the overlay to the appropriate size.
-		 * This is handled by shrinking the overlay before setting it
-		 * to the full document size.
-		 */
-		var $overlays = $( [] );
-		$.each( $.ui.dialog.overlay.instances, function() {
-			$overlays = $overlays.add( this );
-		});
-
-		$overlays.css({
-			width: 0,
-			height: 0
-		}).css({
-			width: $.ui.dialog.overlay.width(),
-			height: $.ui.dialog.overlay.height()
-		});
+		$el.remove();
 	}
 });
 
-- 
2.39.5