content: /*
   * Copyright (C) 2018 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.internal.policy;
  
  import android.content.res.Resources;
  
  import com.android.internal.R;
  
  /**
   * Utility functions for screen decorations used by both window manager and System UI.
   */
  public class ScreenDecorationsUtils {
  
      /**
       * Corner radius that should be used on windows in order to cover the display.
       * These values are expressed in pixels because they should not respect display or font
       * scaling, this means that we don't have to reload them on config changes.
       */
      public static float getWindowCornerRadius(Resources resources) {
          if (!supportsRoundedCornersOnWindows(resources)) {
              return 0f;
          }
  
          // Radius that should be used in case top or bottom aren't defined.
          float defaultRadius = resources.getDimension(R.dimen.rounded_corner_radius)
                  - resources.getDimension(R.dimen.rounded_corner_radius_adjustment);
  
          float topRadius = resources.getDimension(R.dimen.rounded_corner_radius_top)
                  - resources.getDimension(R.dimen.rounded_corner_radius_top_adjustment);
          if (topRadius == 0f) {
              topRadius = defaultRadius;
          }
          float bottomRadius = resources.getDimension(R.dimen.rounded_corner_radius_bottom)
                  - resources.getDimension(R.dimen.rounded_corner_radius_bottom_adjustment);
          if (bottomRadius == 0f) {
              bottomRadius = defaultRadius;
          }
  
          // Always use the smallest radius to make sure the rounded corners will
          // completely cover the display.
          return Math.min(topRadius, bottomRadius);
      }
  
      /**
       * If live rounded corners are supported on windows.
       */
      public static boolean supportsRoundedCornersOnWindows(Resources resources) {
          return resources.getBoolean(R.bool.config_supportsRoundedCornersOnWindows);
      }
  }
  