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+/*
+Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
+For licensing, see LICENSE.html or http://ckeditor.com/license
+*/
+
+/**
+ * @file AutoGrow plugin
+ */
+(function(){
+	var resizeEditor = function( editor )
+	{
+		if ( !editor.window )
+			return;
+		var doc = editor.document,
+			currentHeight = editor.window.getViewPaneSize().height,
+			newHeight;
+
+		// We can not use documentElement to calculate the height for IE (#6061).
+		// It is not good for IE Quirks, yet using offsetHeight would also not work as expected (#6408).
+		// We do the same for FF because of the html height workaround (#6341).
+		if ( CKEDITOR.env.ie || CKEDITOR.env.gecko )
+			newHeight = doc.getBody().$.scrollHeight + ( CKEDITOR.env.ie && CKEDITOR.env.quirks ? 0 : 24 );
+		else
+			newHeight = doc.getDocumentElement().$.offsetHeight;
+
+		var min = editor.config.autoGrow_minHeight,
+			max = editor.config.autoGrow_maxHeight;
+		( min == undefined ) && ( editor.config.autoGrow_minHeight = min = 200 );
+		if ( min )
+			newHeight = Math.max( newHeight, min );
+		if ( max )
+			newHeight = Math.min( newHeight, max );
+
+		if ( newHeight != currentHeight )
+		{
+			newHeight = editor.fire( 'autoGrow', { currentHeight : currentHeight, newHeight : newHeight } ).newHeight;
+			editor.resize( editor.container.getStyle( 'width' ), newHeight, true );
+		}
+	};
+	CKEDITOR.plugins.add( 'autogrow',
+	{
+		init : function( editor )
+		{
+			for ( var eventName in { contentDom:1, key:1, selectionChange:1, insertElement:1 } )
+			{
+				editor.on( eventName, function( evt )
+				{
+					var maximize = editor.getCommand( 'maximize' );
+					// Some time is required for insertHtml, and it gives other events better performance as well.
+					if ( evt.editor.mode == 'wysiwyg' &&
+						// Disable autogrow when the editor is maximized .(#6339)
+						( !maximize || maximize.state != CKEDITOR.TRISTATE_ON ) )
+					{
+						setTimeout( function(){ resizeEditor( evt.editor ); }, 100 );
+					}
+				});
+			}
+		}
+	});
+})();
+/**
+ * The minimum height to which the editor can reach using AutoGrow.
+ * @name CKEDITOR.config.autoGrow_minHeight
+ * @type Number
+ * @default 200
+ * @since 3.4
+ * @example
+ * config.autoGrow_minHeight = 300;
+ */
+
+/**
+ * The maximum height to which the editor can reach using AutoGrow. Zero means unlimited.
+ * @name CKEDITOR.config.autoGrow_maxHeight
+ * @type Number
+ * @default 0
+ * @since 3.4
+ * @example
+ * config.autoGrow_maxHeight = 400;
+ */
+
+/**
+ * Fired when the AutoGrow plugin is about to change the size of the editor.
+ * @name CKEDITOR.editor#autogrow
+ * @event
+ * @param {Number} data.currentHeight The current height of the editor (before the resizing).
+ * @param {Number} data.newHeight The new height of the editor (after the resizing). It can be changed
+ *				to determine another height to be used instead.
+ */