/**
 * 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.paging;

import org.waveprotocol.wave.client.paging.Traverser.BlockSide;
import org.waveprotocol.wave.client.paging.Traverser.MoveablePoint;
import org.waveprotocol.wave.client.paging.Traverser.Point;

/**
 * An instantiable version of {@link MoveablePoint}.
 *
 */
final class SimpleMoveablePoint extends MoveablePoint {
  SimpleMoveablePoint(BlockSide side, Block block) {
    super(side, block);
  }

  static SimpleMoveablePoint startOf(Block block) {
    return new SimpleMoveablePoint(BlockSide.START, block);
  }

  static SimpleMoveablePoint endOf(Block block) {
    return new SimpleMoveablePoint(BlockSide.END, block);
  }

  static SimpleMoveablePoint at(Point ref) {
    return new SimpleMoveablePoint(ref.side, ref.block);
  }
}