/**
* @license Copyright (c) 2003-2017, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or http://ckeditor.com/license
*/
/**
* Controls keystrokes typing in an editor instance.
*
* @class
* @constructor Creates a keystrokeHandler class instance.
* @param {CKEDITOR.editor} editor The editor instance.
*/
CKEDITOR.keystrokeHandler = function( editor ) {
if ( editor.keystrokeHandler )
return editor.keystrokeHandler;
/**
* A list of keystrokes associated with commands. Each entry points to the
* command to be executed.
*
* Since CKEditor 4 there is no need to modify this property directly during the runtime.
* Use {@link CKEDITOR.editor#setKeystroke} instead.
*/
this.keystrokes = {};
/**
* A list of keystrokes that should be blocked if not defined in
* {@link #keystrokes}. In this way it is possible to block the default
* browser behavior for those keystrokes.
*/
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, domEvent: event } ) === false );
if ( !cancel ) {
if ( command ) {
var data = { from: 'keystrokeHandler' };
cancel = ( editor.execCommand( command, data ) !== false );
}
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 be handled by this keystrokeHandler.
*
* @param {CKEDITOR.dom.domObject} domObject The DOM object to attach to.
*/
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.gecko && CKEDITOR.env.mac )
domObject.on( 'keypress', onKeyPress, this );
}
};
} )();
/**
* A list associating keystrokes with 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.
*
* This setting should be used to define (as well as to overwrite or remove) keystrokes
* set by plugins (like `link` and `basicstyles`). If you want to set a keystroke
* for your plugin or during the runtime, use {@link CKEDITOR.editor#setKeystroke} instead.
*
* Since default keystrokes are set by the {@link CKEDITOR.editor#setKeystroke}
* method, by default `config.keystrokes` is an empty array.
*
* See {@link CKEDITOR.editor#setKeystroke} documentation for more details
* regarding the start up order.
*
* // Change default Ctrl+L keystroke for 'link' command to Ctrl+Shift+L.
* config.keystrokes = [
* ...
* [ CKEDITOR.CTRL + CKEDITOR.SHIFT + 76, 'link' ], // Ctrl+Shift+L
* ...
* ];
*
* To reset a particular keystroke, the following approach can be used:
*
* // Disable default Ctrl+L keystroke which executes the 'link' command by default.
* config.keystrokes = [
* ...
* [ CKEDITOR.CTRL + 76, null ], // Ctrl+L
* ...
* ];
*
* In order to reset all default keystrokes, a {@link CKEDITOR#instanceReady} callback should be
* used. This is since editor defaults are merged rather than overwritten by
* user keystrokes.
*
* **Note**: This can be potentially harmful for the editor. Avoid this unless you are
* aware of the consequences.
*
* // Reset all default keystrokes.
* config.on.instanceReady = function() {
* this.keystrokeHandler.keystrokes = [];
* };
*
* @cfg {Array} [keystrokes=[]]
* @member CKEDITOR.config
*/
/**
* Fired when any keyboard key (or a combination thereof) is pressed in the editing area.
*
* editor.on( 'key', function( evt ) {
* if ( evt.data.keyCode == CKEDITOR.CTRL + 90 ) {
* // Do something...
*
* // Cancel the event, so other listeners will not be executed and
* // the keydown's default behavior will be prevented.
* evt.cancel();
* }
* } );
*
* Usually you will want to use the {@link CKEDITOR.editor#setKeystroke} method or
* the {@link CKEDITOR.config#keystrokes} option to attach a keystroke to some {@link CKEDITOR.command command}.
* Key event listeners are usuful when some action should be executed conditionally, based
* for example on precise selection location.
*
* @event key
* @member CKEDITOR.editor
* @param data
* @param {Number} data.keyCode A number representing the key code (or a combination thereof).
* 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.
* @param {CKEDITOR.dom.event} data.domEvent A `keydown` DOM event instance. Available since CKEditor 4.4.1.
* @param {CKEDITOR.editor} editor This editor instance.
*/
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