// Copyright 2012 Google Inc. All Rights Reserved.
//
// 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.
package com.google.collide.client.editor.input;
import com.google.collide.json.shared.JsonArray;
import com.google.collide.shared.util.JsonCollections;
import org.waveprotocol.wave.client.common.util.SignalEvent;
/**
* Implementation of proxy that delegated execution to a list of executors.
*
*/
public class RootActionExecutor implements ActionExecutor {
/**
* Object used to unregister delegate.
*/
public class Remover {
public Remover(ActionExecutor instance) {
this.instance = instance;
}
private ActionExecutor instance;
public void remove() {
delegates.remove(instance);
}
}
private final JsonArray<ActionExecutor> delegates = JsonCollections.createArray();
public Remover addDelegate(ActionExecutor delegate) {
delegates.add(delegate);
return new Remover(delegate);
}
@Override
public boolean execute(String actionName, InputScheme scheme, SignalEvent event) {
for (int i = 0, l = delegates.size(); i < l; i++) {
if (delegates.get(i).execute(actionName, scheme, event)) {
return true;
}
}
return false;
}
}