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undoui.js
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undoui.js
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/**
* @license Copyright (c) 2003-2020, CKSource - Frederico Knabben. All rights reserved.
* For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
*/
/**
* @module undo/undoui
*/
import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
import undoIcon from '../theme/icons/undo.svg';
import redoIcon from '../theme/icons/redo.svg';
/**
* The undo UI feature. It introduces the `'undo'` and `'redo'` buttons to the editor.
*
* @extends module:core/plugin~Plugin
*/
export default class UndoUI extends Plugin {
/**
* @inheritDoc
*/
init() {
const editor = this.editor;
const locale = editor.locale;
const t = editor.t;
const localizedUndoIcon = locale.uiLanguageDirection == 'ltr' ? undoIcon : redoIcon;
const localizedRedoIcon = locale.uiLanguageDirection == 'ltr' ? redoIcon : undoIcon;
this._addButton( 'undo', t( 'Undo' ), 'CTRL+Z', localizedUndoIcon );
this._addButton( 'redo', t( 'Redo' ), 'CTRL+Y', localizedRedoIcon );
}
/**
* Creates a button for the specified command.
*
* @private
* @param {String} name Command name.
* @param {String} label Button label.
* @param {String} keystroke Command keystroke.
* @param {String} Icon Source of the icon.
*/
_addButton( name, label, keystroke, Icon ) {
const editor = this.editor;
editor.ui.componentFactory.add( name, locale => {
const command = editor.commands.get( name );
const view = new ButtonView( locale );
view.set( {
label,
icon: Icon,
keystroke,
tooltip: true
} );
view.bind( 'isEnabled' ).to( command, 'isEnabled' );
this.listenTo( view, 'execute', () => {
editor.execute( name );
editor.editing.view.focus();
} );
return view;
} );
}
}