ckeditor/_source/core/command.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
*/

/**
 * Creates a command class instance.
 * @class Represents a command that can be executed on an editor instance.
 * @param {CKEDITOR.editor} editor The editor instance this command will be
 *		related to.
 * @param {CKEDITOR.commandDefinition} commandDefinition The command
 *		definition.
 * @augments CKEDITOR.event
 * @example
 * var command = new CKEDITOR.command( editor,
 *     {
 *         exec : function( editor )
 *         {
 *             alert( editor.document.getBody().getHtml() );
 *         }
 *     });
 */
CKEDITOR.command = function( editor, commandDefinition )
{
	/**
	 * Lists UI items that are associated to this command. This list can be
	 * used to interact with the UI on command execution (by the execution code
	 * itself, for example).
	 * @type Array
	 * @example
	 * alert( 'Number of UI items associated to this command: ' + command.<b>uiItems</b>.length );
	 */
	this.uiItems = [];

	/**
	 * Executes the command.
	 * @param {Object} [data] Any data to pass to the command. Depends on the
	 *		command implementation and requirements.
	 * @returns {Boolean} A boolean indicating that the command has been
	 *      successfully executed.
	 * @example
	 * command.<b>exec()</b>;  // The command gets executed.
	 */
	this.exec = function( data )
	{
		if ( this.state == CKEDITOR.TRISTATE_DISABLED )
			return false;

		if ( this.editorFocus )     // Give editor focus if necessary (#4355).
			editor.focus();

		return ( commandDefinition.exec.call( this, editor, data ) !== false );
	};

	CKEDITOR.tools.extend( this, commandDefinition,
		// Defaults
		/** @lends CKEDITOR.command.prototype */
		{
			/**
			 * The editor modes within which the command can be executed. The