/**
 * 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.doodad.experimental.htmltemplate;

import org.waveprotocol.wave.client.editor.NodeMutationHandlerImpl;
import org.waveprotocol.wave.client.editor.content.ContentElement;
import org.waveprotocol.wave.client.editor.content.ContentNode;

/**
 * Mutation handler for <namevaluepair> nodes. Notifies Caja code of changes.
 *
 * @author ihab@google.com (Ihab Awad)
 */
class NameValuePairNodeMutationHandler
    extends NodeMutationHandlerImpl<ContentNode, ContentElement> {

  @Override
  public void onAddedToParent(ContentElement nameValuePair, ContentElement oldParent) {
    getContext(nameValuePair).onNameValuePairAdded(nameValuePair);
  }

  @Override
  public void onAttributeModified(ContentElement nameValuePair, String name,
      String oldValue, String newValue) {
    getContext(nameValuePair).onNameValuePairAttributeModified(nameValuePair, name, oldValue, newValue);
  }

  @Override
  public void onRemovedFromParent(ContentElement nameValuePair, ContentElement newParent) {
    getContext(nameValuePair).onNameValuePairRemoved(nameValuePair);
  }

  private PluginContext getContext(ContentElement nameValuePair) {
    return nameValuePair.getParentElement()
        .getProperty(HtmlTemplate.TEMPLATE_PLUGIN_CONTEXT);
  }
}