content: /*
   * Copyright (C) 2016 The Android Open Source Project
   *
   * 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 com.android.server.wm.animation;
  
  import android.graphics.Rect;
  import android.view.animation.ClipRectAnimation;
  import android.view.animation.Transformation;
  
  /**
   * Special case of ClipRectAnimation that animates only the left/right
   * dimensions of the clip, picking up the other dimensions from whatever is
   * set on the transform already.
   *
   * @hide
   */
  public class ClipRectLRAnimation extends ClipRectAnimation {
  
      /**
       * Constructor. Passes in 0 for Top/Bottom parameters of ClipRectAnimation
       */
      public ClipRectLRAnimation(int fromL, int fromR, int toL, int toR) {
          super(fromL, 0, fromR, 0, toL, 0, toR, 0);
      }
  
      /**
       * Calculates and sets clip rect on given transformation. It uses existing values
       * on the Transformation for Top/Bottom clip parameters.
       */
      @Override
      protected void applyTransformation(float it, Transformation tr) {
          Rect oldClipRect = tr.getClipRect();
          tr.setClipRect(mFromRect.left + (int) ((mToRect.left - mFromRect.left) * it),
                  oldClipRect.top,
                  mFromRect.right + (int) ((mToRect.right - mFromRect.right) * it),
                  oldClipRect.bottom);
      }
  }
  