content: /*
   * Copyright (C) 2017 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.launcher3.folder;
  
  import com.android.launcher3.FolderInfo;
  import com.android.launcher3.InvariantDeviceProfile;
  import com.android.launcher3.config.FeatureFlags;
  
  /**
   * Verifies whether an item in a Folder is displayed in the FolderIcon preview.
   */
  public class FolderIconPreviewVerifier {
  
      private final int mMaxGridCountX;
      private final int mMaxGridCountY;
      private final int mMaxItemsPerPage;
      private final int[] mGridSize = new int[2];
  
      private int mGridCountX;
      private boolean mDisplayingUpperLeftQuadrant = false;
  
      public FolderIconPreviewVerifier(InvariantDeviceProfile profile) {
          mMaxGridCountX = profile.numFolderColumns;
          mMaxGridCountY = profile.numFolderRows;
          mMaxItemsPerPage = mMaxGridCountX * mMaxGridCountY;
      }
  
      public void setFolderInfo(FolderInfo info) {
          int numItemsInFolder = info.contents.size();
          FolderPagedView.calculateGridSize(numItemsInFolder, 0, 0, mMaxGridCountX,
                  mMaxGridCountY, mMaxItemsPerPage, mGridSize);
          mGridCountX = mGridSize[0];
  
          mDisplayingUpperLeftQuadrant = FeatureFlags.LAUNCHER3_NEW_FOLDER_ANIMATION
                  && !FeatureFlags.LAUNCHER3_LEGACY_FOLDER_ICON
                  && numItemsInFolder > FolderIcon.NUM_ITEMS_IN_PREVIEW;
      }
  
      /**
       * Returns whether the item with {@param rank} is in the default Folder icon preview.
       */
      public boolean isItemInPreview(int rank) {
          return isItemInPreview(0, rank);
      }
  
      /**
       * @param page The page the item is on.
       * @param rank The rank of the item.
       * @return True iff the icon is in the 2x2 upper left quadrant of the Folder.
       */
      public boolean isItemInPreview(int page, int rank) {
          // First page items are laid out such that the first 4 items are always in the upper
          // left quadrant. For all other pages, we need to check the row and col.
          if (page > 0 || mDisplayingUpperLeftQuadrant) {
              int col = rank % mGridCountX;
              int row = rank / mGridCountX;
              return col < 2 && row < 2;
          }
          return rank < FolderIcon.NUM_ITEMS_IN_PREVIEW;
      }
  }
  