FCKeditor/editor/plugins/autogrow/fckplugin.js

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/*
 * FCKeditor - The text editor for internet
 * Copyright (C) 2003-2006 Frederico Caldeira Knabben
 * 
 * Licensed under the terms of the GNU Lesser General Public License:
 * 		http://www.opensource.org/licenses/lgpl-license.php
 * 
 * For further information visit:
 * 		http://www.fckeditor.net/
 * 
 * "Support Open Source software. What about a donation today?"
 * 
 * File Name: fckplugin.js
 * 	Plugin: automatically resizes the editor until a configurable maximun 
 * 	height (FCKConfig.AutoGrowMax), based on its contents.
 * 
 * File Authors:
 * 		Frederico Caldeira Knabben (fredck@fckeditor.net)
 */

var FCKAutoGrow_Min = window.frameElement.offsetHeight ;

function FCKAutoGrow_Check()
{
	var oInnerDoc = FCK.EditorDocument ;

	var iFrameHeight, iInnerHeight ;
	
	if ( FCKBrowserInfo.IsIE )
	{
		iFrameHeight = FCK.EditorWindow.frameElement.offsetHeight ;
		iInnerHeight = oInnerDoc.body.scrollHeight ;
	}
	else
	{
		iFrameHeight = FCK.EditorWindow.innerHeight ;
		iInnerHeight = oInnerDoc.body.offsetHeight ;
	}

	var iDiff = iInnerHeight - iFrameHeight ;

	if ( iDiff != 0 )
	{
		var iMainFrameSize = window.frameElement.offsetHeight ;
		
		if ( iDiff > 0 && iMainFrameSize < FCKConfig.AutoGrowMax )
		{
			iMainFrameSize += iDiff ;
			if ( iMainFrameSize > FCKConfig.AutoGrowMax )
				iMainFrameSize = FCKConfig.AutoGrowMax ;
		}
		else if ( iDiff < 0 && iMainFrameSize > FCKAutoGrow_Min )
		{
			iMainFrameSize += iDiff ;
			if ( iMainFrameSize < FCKAutoGrow_Min )
				iMainFrameSize = FCKAutoGrow_Min ;
		}
		else
			return ;