content: /*
   * Copyright (C) 2015 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 dev.dworks.apps.anexplorer.misc;
  
  import android.graphics.Matrix;
  import android.graphics.Rect;
  import android.graphics.RectF;
  import android.view.View;
  import android.view.ViewGroup;
  import android.view.ViewParent;
  
  class ViewGroupUtilsHoneycomb {
      private static final ThreadLocal<Matrix> sMatrix = new ThreadLocal<>();
      private static final ThreadLocal<RectF> sRectF = new ThreadLocal<>();
      private static final Matrix IDENTITY = new Matrix();
  
      public static void offsetDescendantRect(ViewGroup group, View child, Rect rect) {
          Matrix m = sMatrix.get();
          if (m == null) {
              m = new Matrix();
              sMatrix.set(m);
          } else {
              m.set(IDENTITY);
          }
  
          offsetDescendantMatrix(group, child, m);
  
          RectF rectF = sRectF.get();
          if (rectF == null) {
              rectF = new RectF();
          }
          rectF.set(rect);
          m.mapRect(rectF);
          rect.set((int) (rectF.left + 0.5f), (int) (rectF.top + 0.5f),
                  (int) (rectF.right + 0.5f), (int) (rectF.bottom + 0.5f));
      }
  
      static void offsetDescendantMatrix(ViewParent target, View view, Matrix m) {
          final ViewParent parent = view.getParent();
          if (parent instanceof View && parent != target) {
              final View vp = (View) parent;
              offsetDescendantMatrix(target, vp, m);
              m.preTranslate(-vp.getScrollX(), -vp.getScrollY());
          }
  
          m.preTranslate(view.getLeft(), view.getTop());
  
          if (!view.getMatrix().isIdentity()) {
              m.preConcat(view.getMatrix());
          }
      }
  }
  