/**
 * 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.testing;

import org.waveprotocol.wave.client.editor.content.ContentNode;
import org.waveprotocol.wave.client.editor.content.ContentRange;
import org.waveprotocol.wave.client.editor.content.FocusedContentRange;
import org.waveprotocol.wave.client.editor.selection.content.SelectionHelper;
import org.waveprotocol.wave.model.document.util.FocusedRange;
import org.waveprotocol.wave.model.document.util.Point;
import org.waveprotocol.wave.model.document.util.Range;

/**
 * Empty implementation. Suitable for subclassing.
 *
 * @author danilatos@google.com (Daniel Danilatos)
 */
public class StubSelectionHelper implements SelectionHelper {

  public static final StubSelectionHelper INSTANCE = new StubSelectionHelper();

  public void clearSelection() {

  }

  public FocusedContentRange getSelectionPoints() {
    return null;
  }

  @Override
  public ContentRange getOrderedSelectionPoints() {
    return null;
  }

  public FocusedRange getSelectionRange() {
    return null;
  }

  @Override
  public Range getOrderedSelectionRange() {
    return null;
  }

  public void setCaret(Point<ContentNode> caret) {

  }

  @Override
  public void setCaret(int caret) {

  }

  public void setSelectionPoints(Point<ContentNode> start,
      Point<ContentNode> end) {

  }

  public void setSelectionRange(FocusedRange selection) {

  }

  public Point<ContentNode> getFirstValidSelectionPoint() {
    return null;
  }

  public Point<ContentNode> getLastValidSelectionPoint() {
    return null;
  }

  public boolean isValidSelectionPoint(Point<ContentNode> cp) {
    return false;
  }
}