SalesSystemOnline/ckeditor_3.6/ckeditor/_source/plugins/selection/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
*/

(function()
{
	// #### checkSelectionChange : START

	// The selection change check basically saves the element parent tree of
	// the current node and check it on successive requests. If there is any
	// change on the tree, then the selectionChange event gets fired.
	function checkSelectionChange()
	{
		try
		{
			// In IE, the "selectionchange" event may still get thrown when
			// releasing the WYSIWYG mode, so we need to check it first.
			var sel = this.getSelection();
			if ( !sel || !sel.document.getWindow().$ )
				return;

			var firstElement = sel.getStartElement();
			var currentPath = new CKEDITOR.dom.elementPath( firstElement );

			if ( !currentPath.compare( this._.selectionPreviousPath ) )
			{
				this._.selectionPreviousPath = currentPath;
				this.fire( 'selectionChange', { selection : sel, path : currentPath, element : firstElement } );
			}
		}
		catch (e)
		{}
	}

	var checkSelectionChangeTimer,
		checkSelectionChangeTimeoutPending;

	function checkSelectionChangeTimeout()
	{
		// Firing the "OnSelectionChange" event on every key press started to
		// be too slow. This function guarantees that there will be at least
		// 200ms delay between selection checks.

		checkSelectionChangeTimeoutPending = true;

		if ( checkSelectionChangeTimer )
			return;

		checkSelectionChangeTimeoutExec.call( this );

		checkSelectionChangeTimer = CKEDITOR.tools.setTimeout( checkSelectionChangeTimeoutExec, 200, this );
	}

	function checkSelectionChangeTimeoutExec()
	{
		checkSelectionChangeTimer = null;

		if ( checkSelectionChangeTimeoutPending )
		{