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- /**
- * @license Copyright (c) 2003-2018, CKSource - Frederico Knabben. All rights reserved.
- * For licensing, see LICENSE.md.
- */
- /**
- * @module engine/model/operation/nooperation
- */
- import Operation from './operation';
- /**
- * Operation which is doing nothing ("empty operation", "do-nothing operation", "noop"). This is an operation,
- * which when executed does not change the tree model. It still has some parameters defined for transformation purposes.
- *
- * In most cases this operation is a result of transforming operations. When transformation returns
- * {@link module:engine/model/operation/nooperation~NoOperation} it means that changes done by the transformed operation
- * have already been applied.
- *
- * @extends module:engine/model/operation/operation~Operation
- */
- export default class NoOperation extends Operation {
- get type() {
- return 'noop';
- }
- /**
- * Creates and returns an operation that has the same parameters as this operation.
- *
- * @returns {module:engine/model/operation/nooperation~NoOperation} Clone of this operation.
- */
- clone() {
- return new NoOperation( this.baseVersion );
- }
- /**
- * See {@link module:engine/model/operation/operation~Operation#getReversed `Operation#getReversed()`}.
- *
- * @returns {module:engine/model/operation/nooperation~NoOperation}
- */
- getReversed() {
- return new NoOperation( this.baseVersion + 1 );
- }
- _execute() {
- }
- /**
- * @inheritDoc
- */
- static get className() {
- return 'engine.model.operation.NoOperation';
- }
- }
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