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- /**
- * @license Copyright (c) 2003-2019, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md or https://ckeditor.com/legal/ckeditor-oss-license
- */
- /**
- * @module indent/indentcommandbehavior/indentusingclasses
- */
- /**
- * The block indentation behavior that uses classes to set indentation.
- *
- * @implements module:indent/indentblockcommand~IndentBehavior
- */
- export default class IndentUsingClasses {
- /**
- * Creates an instance of the command.
- *
- * @param {Object} config
- * @param {String} config.direction The direction of indentation.
- * @param {Array.<String>} config.classes A list of classes used for indentation.
- */
- constructor( config ) {
- /**
- * The direction of indentation.
- *
- * @type {Boolean}
- */
- this.isForward = config.direction === 'forward';
- /**
- * A list of classes used for indentation.
- *
- * @type {Array.<String>}
- */
- this.classes = config.classes;
- }
- /**
- * @inheritDoc
- */
- checkEnabled( indentAttributeValue ) {
- const currentIndex = this.classes.indexOf( indentAttributeValue );
- if ( this.isForward ) {
- return currentIndex < this.classes.length - 1;
- } else {
- return currentIndex >= 0;
- }
- }
- /**
- * @inheritDoc
- */
- getNextIndent( indentAttributeValue ) {
- const currentIndex = this.classes.indexOf( indentAttributeValue );
- const indexStep = this.isForward ? 1 : -1;
- return this.classes[ currentIndex + indexStep ];
- }
- }
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