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- /**
- * @license Copyright (c) 2003-2015, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- 'use strict';
- CKEDITOR.define( [
- 'document/operation/operation'
- ], ( Operation ) => {
- /**
- * Operation that is doing nothing ("empty operation", "do-nothing operation", "noop").
- * This is an operation, which {@link #_execute} method does not change tree model.
- * It still has defined some parameters for transformations purposes.
- *
- * In most cases this operation is a result of transforming operations. When transformation returns
- * {@link document.operation.NoOperation} it means that changes done by the transformed operation
- * has already been applied.
- *
- * @class document.operation.NoOperation
- */
- class NoOperation extends Operation {
- _execute() {
- // Do nothing.
- }
- clone( baseVersion ) {
- /* istanbul ignore else */
- if ( !baseVersion ) {
- baseVersion = this.baseVersion;
- }
- return new NoOperation( baseVersion );
- }
- getReversed() {
- return new NoOperation( this.baseVersion + 1 );
- }
- getTransformedBy() {
- return this.clone();
- }
- }
- return NoOperation;
- } );
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