/**
 * Copyright 2008 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;

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

import org.waveprotocol.wave.client.editor.ElementHandlerRegistry;
import org.waveprotocol.wave.client.editor.NodeEventHandlerImpl;
import org.waveprotocol.wave.client.editor.event.EditorEvent;

/**
 * Root document element. Provides some event handlers.
 *
 * @author danilatos@google.com (Daniel Danilatos)
 */
public final class ContentDocElement {

  public static final String DEFAULT_TAGNAME = "doc";

  public static void register(ElementHandlerRegistry registry, String tagName) {
    registry.registerRenderer(tagName, new Renderer() {
      @Override
      public Element createDomImpl(final Renderable element) {
        return element.setAutoAppendContainer(Document.get().createDivElement());
      }
    });

    registry.registerEventHandler(tagName, new NodeEventHandlerImpl() {
      @Override
      public boolean handleLeftAtBeginning(ContentElement element, EditorEvent event) {
        return true;
      }

      @Override
      public boolean handleRightAtEnd(ContentElement element, EditorEvent event) {
        return true;
      }

      @Override
      public boolean handleDeleteAtEnd(ContentElement element, EditorEvent event) {
        return true;
      }

      @Override
      public boolean handleBackspaceAtBeginning(ContentElement element, EditorEvent event) {
        return true;
      }
    });
  }

  private ContentDocElement() {}
}