1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.launcher3.folder; 18 19 import com.android.launcher3.FolderInfo; 20 import com.android.launcher3.InvariantDeviceProfile; 21 import com.android.launcher3.config.FeatureFlags; 22 23 /** 24 * Verifies whether an item in a Folder is displayed in the FolderIcon preview. 25 */ 26 public class FolderIconPreviewVerifier { 27 28 private final int mMaxGridCountX; 29 private final int mMaxGridCountY; 30 private final int mMaxItemsPerPage; 31 private final int[] mGridSize = new int[2]; 32 33 private int mGridCountX; 34 private boolean mDisplayingUpperLeftQuadrant = false; 35 FolderIconPreviewVerifier(InvariantDeviceProfile profile)36 public FolderIconPreviewVerifier(InvariantDeviceProfile profile) { 37 mMaxGridCountX = profile.numFolderColumns; 38 mMaxGridCountY = profile.numFolderRows; 39 mMaxItemsPerPage = mMaxGridCountX * mMaxGridCountY; 40 } 41 setFolderInfo(FolderInfo info)42 public void setFolderInfo(FolderInfo info) { 43 int numItemsInFolder = info.contents.size(); 44 FolderPagedView.calculateGridSize(numItemsInFolder, 0, 0, mMaxGridCountX, 45 mMaxGridCountY, mMaxItemsPerPage, mGridSize); 46 mGridCountX = mGridSize[0]; 47 48 mDisplayingUpperLeftQuadrant = FeatureFlags.LAUNCHER3_NEW_FOLDER_ANIMATION 49 && !FeatureFlags.LAUNCHER3_LEGACY_FOLDER_ICON 50 && numItemsInFolder > FolderIcon.NUM_ITEMS_IN_PREVIEW; 51 } 52 53 /** 54 * Returns whether the item with {@param rank} is in the default Folder icon preview. 55 */ isItemInPreview(int rank)56 public boolean isItemInPreview(int rank) { 57 return isItemInPreview(0, rank); 58 } 59 60 /** 61 * @param page The page the item is on. 62 * @param rank The rank of the item. 63 * @return True iff the icon is in the 2x2 upper left quadrant of the Folder. 64 */ isItemInPreview(int page, int rank)65 public boolean isItemInPreview(int page, int rank) { 66 // First page items are laid out such that the first 4 items are always in the upper 67 // left quadrant. For all other pages, we need to check the row and col. 68 if (page > 0 || mDisplayingUpperLeftQuadrant) { 69 int col = rank % mGridCountX; 70 int row = rank / mGridCountX; 71 return col < 2 && row < 2; 72 } 73 return rank < FolderIcon.NUM_ITEMS_IN_PREVIEW; 74 } 75 } 76