/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.
*/
package org.waveprotocol.wave.client.editor;
import org.waveprotocol.wave.model.document.operation.Nindo;
import org.waveprotocol.wave.model.operation.OperationSequencer;
/**
* A sequencer that guards all its operations as undoable
*
* @author danilatos@google.com (Daniel Danilatos);
*/
public class UndoableSequencer implements OperationSequencer<Nindo> {
private final OperationSequencer<Nindo> sequencer;
Responsibility.Manager responsibility;
public UndoableSequencer(
OperationSequencer<Nindo> chainedSequencer,
Responsibility.Manager responsibility) {
this.responsibility = responsibility;
this.sequencer = chainedSequencer;
}
@Override
public void begin() {
responsibility.startDirectSequence();
sequencer.begin();
}
@Override
public void end() {
sequencer.end();
responsibility.endDirectSequence();
}
@Override
public void consume(Nindo op) {
sequencer.consume(op);
}
}