ckeditor/ckeditor5-block-quote

/**
 * @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 block-quote/blockquoteui
 */

import Plugin from '@ckeditor/ckeditor5-core/src/plugin';
import ButtonView from '@ckeditor/ckeditor5-ui/src/button/buttonview';

import quoteIcon from '@ckeditor/ckeditor5-core/theme/icons/quote.svg';
import '../theme/blockquote.css';

/**
 * The block quote UI plugin.
 *
 * It introduces the `'blockQuote'` button.
 *
 * @extends module:core/plugin~Plugin
 */
export default class BlockQuoteUI extends Plugin {
    /**
     * @inheritDoc
     */
    init() {
        const editor = this.editor;
        const t = editor.t;

        editor.ui.componentFactory.add( 'blockQuote', locale => {
            const command = editor.commands.get( 'blockQuote' );
            const buttonView = new ButtonView( locale );

            buttonView.set( {
                label: t( 'Block quote' ),
                icon: quoteIcon,
                tooltip: true,
                isToggleable: true
            } );

            // Bind button model to command.
            buttonView.bind( 'isOn', 'isEnabled' ).to( command, 'value', 'isEnabled' );

            // Execute command.
            this.listenTo( buttonView, 'execute', () => {
                editor.execute( 'blockQuote' );
                editor.editing.view.focus();
            } );

            return buttonView;
        } );
    }
}