ckeditor/_source/plugins/resize/plugin.js

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/*
Copyright (c) 2003-2011, CKSource - Frederico Knabben. All rights reserved.
For licensing, see LICENSE.html or http://ckeditor.com/license
*/

CKEDITOR.plugins.add( 'resize',
{
	init : function( editor )
	{
		var config = editor.config;

		// Resize in the same direction of chrome,
		// which is identical to dir of editor element. (#6614)
		var resizeDir = editor.element.getDirection( 1 );

		!config.resize_dir && ( config.resize_dir = 'both' );
		( config.resize_maxWidth == undefined ) && ( config.resize_maxWidth = 3000 );
		( config.resize_maxHeight == undefined ) && ( config.resize_maxHeight = 3000 );
		( config.resize_minWidth == undefined ) && ( config.resize_minWidth = 750 );
		( config.resize_minHeight == undefined ) && ( config.resize_minHeight = 250 );

		if ( config.resize_enabled !== false )
		{
			var container = null,
				origin,
				startSize,
				resizeHorizontal = ( config.resize_dir == 'both' || config.resize_dir == 'horizontal' ) &&
					( config.resize_minWidth != config.resize_maxWidth ),
				resizeVertical = ( config.resize_dir == 'both' || config.resize_dir == 'vertical' ) &&
					( config.resize_minHeight != config.resize_maxHeight );

			function dragHandler( evt )
			{
				var dx = evt.data.$.screenX - origin.x,
					dy = evt.data.$.screenY - origin.y,
					width = startSize.width,
					height = startSize.height,
					internalWidth = width + dx * ( resizeDir == 'rtl' ? -1 : 1 ),
					internalHeight = height + dy;

				if ( resizeHorizontal )
					width =  Math.max( config.resize_minWidth, Math.min( internalWidth, config.resize_maxWidth ) );

				if ( resizeVertical )
					height =  Math.max( config.resize_minHeight, Math.min( internalHeight, config.resize_maxHeight ) );

				editor.resize( width, height );
			}

			function dragEndHandler ( evt )
			{
				CKEDITOR.document.removeListener( 'mousemove', dragHandler );
				CKEDITOR.document.removeListener( 'mouseup', dragEndHandler );

				if ( editor.document )
				{
					editor.document.removeListener( 'mousemove', dragHandler );
					editor.document.removeListener( 'mouseup', dragEndHandler );
				}
			}