All files / core/operation Overwrite.ts

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/**
 * Copyright 2017 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
import { Operation, OperationSource, OperationType } from './Operation';
import { Path } from '../util/Path';
import { Node } from '../snap/Node';
 
/**
 * @param {!OperationSource} source
 * @param {!Path} path
 * @param {!Node} snap
 * @constructor
 * @implements {Operation}
 */
export class Overwrite implements Operation {
  /** @inheritDoc */
  type = OperationType.OVERWRITE;
 
  constructor(
    public source: OperationSource,
    public path: Path,
    public snap: Node
  ) {}
 
  operationForChild(childName: string): Overwrite {
    if (this.path.isEmpty()) {
      return new Overwrite(
        this.source,
        Path.Empty,
        this.snap.getImmediateChild(childName)
      );
    } else {
      return new Overwrite(this.source, this.path.popFront(), this.snap);
    }
  }
}