source: trunk/admin/inc/ckeditor/_source/plugins/keystrokes/plugin.js@ 428

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

// Register a plugin named "sample".
CKEDITOR.plugins.add( 'keystrokes',
{
        beforeInit : function( editor )
        {
                /**
                 * Controls keystrokes typing in this editor instance.
                 * @name CKEDITOR.editor.prototype.keystrokeHandler
                 * @type CKEDITOR.keystrokeHandler
                 * @example
                 */
                editor.keystrokeHandler = new CKEDITOR.keystrokeHandler( editor );

                editor.specialKeys = {};
        },

        init : function( editor )
        {
                var keystrokesConfig    = editor.config.keystrokes,
                        blockedConfig           = editor.config.blockedKeystrokes;

                var keystrokes                  = editor.keystrokeHandler.keystrokes,
                        blockedKeystrokes       = editor.keystrokeHandler.blockedKeystrokes;

                for ( var i = 0 ; i < keystrokesConfig.length ; i++ )
                        keystrokes[ keystrokesConfig[i][0] ] = keystrokesConfig[i][1];

                for ( i = 0 ; i < blockedConfig.length ; i++ )
                        blockedKeystrokes[ blockedConfig[i] ] = 1;
        }
});

/**
 * Controls keystrokes typing in an editor instance.
 * @constructor
 * @param {CKEDITOR.editor} editor The editor instance.
 * @example
 */
CKEDITOR.keystrokeHandler = function( editor )
{
        if ( editor.keystrokeHandler )
                return editor.keystrokeHandler;

        /**
         * List of keystrokes associated to commands. Each entry points to the
         * command to be executed.
         * @type Object
         * @example
         */
        this.keystrokes = {};

        /**
         * List of keystrokes that should be blocked if not defined at
         * {@link keystrokes}. In this way it is possible to block the default
         * browser behavior for those keystrokes.
         * @type Object
         * @example
         */
        this.blockedKeystrokes = {};

        this._ =
        {
                editor : editor
        };

        return this;
};

(function()
{
        var cancel;

        var onKeyDown = function( event )
        {
                // The DOM event object is passed by the "data" property.
                event = event.data;

                var keyCombination = event.getKeystroke();
                var command = this.keystrokes[ keyCombination ];
                var editor = this._.editor;

                cancel = ( editor.fire( 'key', { keyCode : keyCombination } ) === true );

                if ( !cancel )
                {
                        if ( command )
                        {
                                var data = { from : 'keystrokeHandler' };
                                cancel = ( editor.execCommand( command, data ) !== false );
                        }

                        if  ( !cancel )
                        {
                                var handler = editor.specialKeys[ keyCombination ];
                                cancel = ( handler && handler( editor ) === true );

                                if ( !cancel )
                                        cancel = !!this.blockedKeystrokes[ keyCombination ];
                        }
                }

                if ( cancel )
                        event.preventDefault( true );

                return !cancel;
        };

        var onKeyPress = function( event )
        {
                if ( cancel )
                {
                        cancel = false;
                        event.data.preventDefault( true );
                }
        };

        CKEDITOR.keystrokeHandler.prototype =
        {
                /**
                 * Attaches this keystroke handle to a DOM object. Keystrokes typed
                 ** over this object will get handled by this keystrokeHandler.
                 * @param {CKEDITOR.dom.domObject} domObject The DOM object to attach
                 *              to.
                 * @example
                 */
                attach : function( domObject )
                {
                        // For most browsers, it is enough to listen to the keydown event
                        // only.
                        domObject.on( 'keydown', onKeyDown, this );

                        // Some browsers instead, don't cancel key events in the keydown, but in the
                        // keypress. So we must do a longer trip in those cases.
                        if ( CKEDITOR.env.opera || ( CKEDITOR.env.gecko && CKEDITOR.env.mac ) )
                                domObject.on( 'keypress', onKeyPress, this );
                }
        };
})();

/**
 * A list of keystrokes to be blocked if not defined in the {@link CKEDITOR.config.keystrokes}
 * setting. In this way it is possible to block the default browser behavior
 * for those keystrokes.
 * @type Array
 * @default (see example)
 * @example
 * // This is actually the default value.
 * config.blockedKeystrokes =
 * [
 *     CKEDITOR.CTRL + 66 &#47;*B*&#47;,
 *     CKEDITOR.CTRL + 73 &#47;*I*&#47;,
 *     CKEDITOR.CTRL + 85 &#47;*U*&#47;
 * ];
 */
CKEDITOR.config.blockedKeystrokes =
[
        CKEDITOR.CTRL + 66 /*B*/,
        CKEDITOR.CTRL + 73 /*I*/,
        CKEDITOR.CTRL + 85 /*U*/
];

/**
 * A list associating keystrokes to editor commands. Each element in the list
 * is an array where the first item is the keystroke, and the second is the
 * name of the command to be executed.
 * @type Array
 * @default (see example)
 * @example
 * // This is actually the default value.
 * config.keystrokes =
 * [
 *     [ CKEDITOR.ALT + 121 &#47;*F10*&#47;, 'toolbarFocus' ],
 *     [ CKEDITOR.ALT + 122 &#47;*F11*&#47;, 'elementsPathFocus' ],
 *
 *     [ CKEDITOR.SHIFT + 121 &#47;*F10*&#47;, 'contextMenu' ],
 *
 *     [ CKEDITOR.CTRL + 90 &#47;*Z*&#47;, 'undo' ],
 *     [ CKEDITOR.CTRL + 89 &#47;*Y*&#47;, 'redo' ],
 *     [ CKEDITOR.CTRL + CKEDITOR.SHIFT + 90 &#47;*Z*&#47;, 'redo' ],
 *
 *     [ CKEDITOR.CTRL + 76 &#47;*L*&#47;, 'link' ],
 *
 *     [ CKEDITOR.CTRL + 66 &#47;*B*&#47;, 'bold' ],
 *     [ CKEDITOR.CTRL + 73 &#47;*I*&#47;, 'italic' ],
 *     [ CKEDITOR.CTRL + 85 &#47;*U*&#47;, 'underline' ],
 *
 *     [ CKEDITOR.ALT + 109 &#47;*-*&#47;, 'toolbarCollapse' ]
 * ];
 */
CKEDITOR.config.keystrokes =
[
        [ CKEDITOR.ALT + 121 /*F10*/, 'toolbarFocus' ],
        [ CKEDITOR.ALT + 122 /*F11*/, 'elementsPathFocus' ],

        [ CKEDITOR.SHIFT + 121 /*F10*/, 'contextMenu' ],
        [ CKEDITOR.CTRL + CKEDITOR.SHIFT + 121 /*F10*/, 'contextMenu' ],

        [ CKEDITOR.CTRL + 90 /*Z*/, 'undo' ],
        [ CKEDITOR.CTRL + 89 /*Y*/, 'redo' ],
        [ CKEDITOR.CTRL + CKEDITOR.SHIFT + 90 /*Z*/, 'redo' ],

        [ CKEDITOR.CTRL + 76 /*L*/, 'link' ],

        [ CKEDITOR.CTRL + 66 /*B*/, 'bold' ],
        [ CKEDITOR.CTRL + 73 /*I*/, 'italic' ],
        [ CKEDITOR.CTRL + 85 /*U*/, 'underline' ],

        [ CKEDITOR.ALT + ( CKEDITOR.env.ie || CKEDITOR.env.webkit ? 189 : 109 ) /*-*/, 'toolbarCollapse' ],
        [ CKEDITOR.ALT + 48 /*0*/, 'a11yHelp' ]
];

/**
 * Fired when any keyboard key (or combination) is pressed into the editing area.
 * @name CKEDITOR.editor#key
 * @event
 * @param {Number} data.keyCode A number representing the key code (or
 *              combination). It is the sum of the current key code and the
 *              {@link CKEDITOR.CTRL}, {@link CKEDITOR.SHIFT} and {@link CKEDITOR.ALT}
 *              constants, if those are pressed.
 */