/**
* Copyright 2010 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.
*
*/
package org.waveprotocol.wave.client.wavepanel.view.impl;
import org.waveprotocol.wave.client.wavepanel.view.BlipMenuItemView;
import org.waveprotocol.wave.client.wavepanel.view.BlipMetaView;
import org.waveprotocol.wave.client.wavepanel.view.IntrinsicBlipMenuItemView;
import org.waveprotocol.wave.client.wavepanel.view.IntrinsicBlipMetaView.MenuOption;
/**
* Implements a blip menu-item view by delegating primitive state matters to a
* view object, and structural state matters to a helper. The intent is that the
* helper is a flyweight handler.
*
* @param <I> intrinsic menu-item implementation
*/
public final class BlipMenuItemViewImpl<I extends IntrinsicBlipMenuItemView> // \u2620
extends AbstractStructuredView<BlipMenuItemViewImpl.Helper<? super I>, I> // \u2620
implements BlipMenuItemView {
/**
* Handles structural queries on menu-item views.
*
* @param <I> intrinsic menu-item implementation
*/
public interface Helper<I> {
//
// Structure
//
void remove(I impl);
BlipMetaView getParent(I impl);
}
private BlipMenuItemViewImpl(Helper<? super I> helper, I impl) {
super(helper, impl);
}
public static <I extends IntrinsicBlipMenuItemView> BlipMenuItemViewImpl<I> create(
Helper<? super I> helper, I impl) {
return new BlipMenuItemViewImpl<I>(helper, impl);
}
@Override
public Type getType() {
return Type.MENU_ITEM;
}
//
// Structural delegation.
//
@Override
public BlipMetaView getParent() {
return helper.getParent(impl);
}
@Override
public void remove() {
helper.remove(impl);
}
//
// Intrinsic delegation.
//
@Override
public void select() {
impl.select();
}
@Override
public void deselect() {
impl.deselect();
}
@Override
public MenuOption getOption() {
return impl.getOption();
}
@Override
public void setOption(MenuOption option) {
impl.setOption(option);
}
@Override
public boolean isSelected() {
return impl.isSelected();
}
}