text: /**
   * @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 basic-styles/bold/boldui
   */
  
  import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
  import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';
  
  import boldIcon from '../../theme/icons/bold.svg';
  
  const BOLD = 'bold';
  
  /**
   * The bold UI feature. It introduces the Bold button.
   *
   * @extends module:core/plugin~Plugin
   */
  export default class BoldUI extends Plugin {
  	/**
  	 * @inheritDoc
  	 */
  	init() {
  		const editor = this.editor;
  		const t = editor.t;
  
  		// Add bold button to feature components.
  		editor.ui.componentFactory.add( BOLD, locale => {
  			const command = editor.commands.get( BOLD );
  			const view = new ButtonView( locale );
  
  			view.set( {
  				label: t( 'Bold' ),
  				icon: boldIcon,
  				keystroke: 'CTRL+B',
  				tooltip: true,
  				isToggleable: true,
  				class: 'ck-bold-button'
  			} );
  
  			view.bind( 'isOn', 'isEnabled' ).to( command, 'value', 'isEnabled' );
  
  			// Execute command.
  			this.listenTo( view, 'execute', () => {
  				editor.execute( BOLD );
  				editor.editing.view.focus();
  			} );
  
  			return view;
  		} );
  	}
  }
  