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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
* execution will have no action if the current mode is not listed
* in this property.
* @type Object
* @default { wysiwyg : 1 }
* @see CKEDITOR.editor.prototype.mode
* @example
* // Enable the command in both WYSIWYG and Source modes.
* command.<b>modes</b> = { wysiwyg : 1, source : 1 };
* @example
* // Enable the command in Source mode only.
* command.<b>modes</b> = { source : 1 };
*/
modes : { wysiwyg : 1 },
/**
* Indicates that the editor will get the focus before executing
* the command.
* @type Boolean
* @default true
* @example
* // Do not force the editor to have focus when executing the command.
* command.<b>editorFocus</b> = false;
*/
editorFocus : 1,
/**
* Indicates the editor state. Possible values are:
* <ul>
* <li>{@link CKEDITOR.TRISTATE_DISABLED}: the command is
* disabled. It's execution will have no effect. Same as
* {@link disable}.</li>
* <li>{@link CKEDITOR.TRISTATE_ON}: the command is enabled
* and currently active in the editor (for context sensitive commands,
* for example).</li>
* <li>{@link CKEDITOR.TRISTATE_OFF}: the command is enabled
* and currently inactive in the editor (for context sensitive
* commands, for example).</li>
* </ul>
* Do not set this property directly, using the {@link #setState}
* method instead.
* @type Number
* @default {@link CKEDITOR.TRISTATE_OFF}
* @example
* if ( command.<b>state</b> == CKEDITOR.TRISTATE_DISABLED )
* alert( 'This command is disabled' );
*/
state : CKEDITOR.TRISTATE_OFF
});
// Call the CKEDITOR.event constructor to initialize this instance.
CKEDITOR.event.call( this );
};
CKEDITOR.command.prototype =
{
/**
* Enables the command for execution. The command state (see
* {@link CKEDITOR.command.prototype.state}) available before disabling it
* is restored.
* @example
* command.<b>enable()</b>;
* command.exec(); // Execute the command.
*/
enable : function()
{
if ( this.state == CKEDITOR.TRISTATE_DISABLED )
this.setState( ( !this.preserveState || ( typeof this.previousState == 'undefined' ) ) ? CKEDITOR.TRISTATE_OFF : this.previousState );
},
/**
* Disables the command for execution. The command state (see
* {@link CKEDITOR.command.prototype.state}) will be set to
* {@link CKEDITOR.TRISTATE_DISABLED}.
* @example
* command.<b>disable()</b>;
* command.exec(); // "false" - Nothing happens.
*/
disable : function()
{
this.setState( CKEDITOR.TRISTATE_DISABLED );
},
/**
* Sets the command state.
* @param {Number} newState The new state. See {@link #state}.
* @returns {Boolean} Returns "true" if the command state changed.
* @example
* command.<b>setState( CKEDITOR.TRISTATE_ON )</b>;
* command.exec(); // Execute the command.
* command.<b>setState( CKEDITOR.TRISTATE_DISABLED )</b>;
* command.exec(); // "false" - Nothing happens.
* command.<b>setState( CKEDITOR.TRISTATE_OFF )</b>;
* command.exec(); // Execute the command.
*/
setState : function( newState )
{
// Do nothing if there is no state change.
if ( this.state == newState )
return false;
this.previousState = this.state;
// Set the new state.
this.state = newState;
// Fire the "state" event, so other parts of the code can react to the
// change.
this.fire( 'state' );
return true;
},
/**
* Toggles the on/off (active/inactive) state of the command. This is
* mainly used internally by context sensitive commands.
* @example
* command.<b>toggleState()</b>;
*/
toggleState : function()
{
if ( this.state == CKEDITOR.TRISTATE_OFF )
this.setState( CKEDITOR.TRISTATE_ON );
else if ( this.state == CKEDITOR.TRISTATE_ON )
this.setState( CKEDITOR.TRISTATE_OFF );
}
};
CKEDITOR.event.implementOn( CKEDITOR.command.prototype, true );
/**
* Indicates the previous command state.
* @name CKEDITOR.command.prototype.previousState
* @type Number
* @see #state
* @example
* alert( command.<b>previousState</b> );
*/
/**
* Fired when the command state changes.
* @name CKEDITOR.command#state
* @event
* @example
* command.on( <b>'state'</b> , function( e )
* {
* // Alerts the new state.
* alert( this.state );
* });
*/