/**
 * Copyright 2009 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.editor.content.misc;

import com.google.gwt.dom.client.Element;

import org.waveprotocol.wave.client.common.util.DomHelper;
import org.waveprotocol.wave.client.editor.content.ContentElement;
import org.waveprotocol.wave.client.editor.content.misc.DisplayEditModeHandler.EditModeListener;

/**
 * Convenience handler that keeps the editability of elements in sync with the
 * global editability setting.
 */
public final class UpdateContentEditable implements EditModeListener {
  private UpdateContentEditable() {
  }

  private static final EditModeListener INSTANCE = new UpdateContentEditable();

  /**
   * Return instance of this class.
   */
  public static EditModeListener get() {
    return INSTANCE;
  }

  @Override
  public void onEditModeChange(ContentElement element, boolean isEditing) {
    Element implNodelet = element.getContainerNodelet();
    if (implNodelet != null) {
      DomHelper.setContentEditable(implNodelet, isEditing, true);
    }
  }
}