BlipMetaViewImpl.java

/**
 * 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.wavepanel.view.impl;

import org.waveprotocol.wave.client.wavepanel.view.AnchorView;
import org.waveprotocol.wave.client.wavepanel.view.BlipMetaView;
import org.waveprotocol.wave.client.wavepanel.view.BlipView;
import org.waveprotocol.wave.client.wavepanel.view.FocusFrameView;
import org.waveprotocol.wave.client.wavepanel.view.IntrinsicBlipMetaView;

import java.util.Set;

/**
 * Implements a blip 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 blip implementation
 */
public final class BlipMetaViewImpl<I extends IntrinsicBlipMetaView> // \u2620
    extends AbstractStructuredView<BlipMetaViewImpl.Helper<? super I>, I> // \u2620
    implements BlipMetaView {

  /**
   * Handles structural queries on blip views.
   *
   * @param <I> intrinsic blip implementation
   */
  public interface Helper<I> {

    void insertChrome(I impl, FocusFrameView frame);

    void removeChrome(I impl, FocusFrameView frame);

    //
    // Anchors
    //

    AnchorView getInlineAnchorBefore(I impl, AnchorView ref);

    AnchorView getInlineAnchorAfter(I impl, AnchorView ref);

    void insertInlineAnchorBefore(I impl, AnchorView ref, AnchorView x);

    //
    // Structure
    //

    void remove(I impl);

    BlipView getBlip(I impl);
  }

  public BlipMetaViewImpl(Helper<? super I> helper, I impl) {
    super(helper, impl);
  }

  @Override
  public Type getType() {
    return Type.META;
  }

  //
  // Structural delegation.
  //

  @Override
  public BlipView getParent() {
    return helper.getBlip(impl);
  }

  @Override
  public AnchorView getInlineAnchorAfter(AnchorView ref) {
    return helper.getInlineAnchorAfter(impl, ref);
  }

  @Override
  public AnchorView getInlineAnchorBefore(AnchorView ref) {
    return helper.getInlineAnchorBefore(impl, ref);
  }

  @Override
  public void insertInlineAnchorBefore(AnchorView ref, AnchorView x) {
    helper.insertInlineAnchorBefore(impl, ref, x);
  }

  @Override
  public void placeFocusFrame(FocusFrameView frame) {
    helper.insertChrome(impl, frame);
  }

  @Override
  public void removeFocusChrome(FocusFrameView frame) {
    helper.removeChrome(impl, frame);
  }

  @Override
  public void remove() {
    helper.remove(impl);
  }

  //
  // Intrinsic delegation.
  //

  @Override
  public void setTime(String time) {
    impl.setTime(time);
  }

  @Override
  public void setAvatar(String imageUrl) {
     impl.setAvatar(imageUrl);
  }

  @Override
  public void setMetaline(String metaline) {
    impl.setMetaline(metaline);
  }

  @Override
  public void setRead(boolean read) {
    impl.setRead(read);
  }

  @Override
  public void enable(Set<MenuOption> options) {
    impl.enable(options);
  }

  @Override
  public void disable(Set<MenuOption> options) {
    impl.disable(options);
  }

  @Override
  public void select(MenuOption option) {
    impl.select(option);
  }

  @Override
  public void deselect(MenuOption option) {
    impl.deselect(option);
  }
}