/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.launcher3.folder;
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import android.util.Log;
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import com.android.launcher3.FolderInfo;
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import com.android.launcher3.InvariantDeviceProfile;
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import static com.android.launcher3.folder.ClippedFolderIconLayoutRule.MAX_NUM_ITEMS_IN_PREVIEW;
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/**
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* Verifies whether an item in a Folder is displayed in the FolderIcon preview.
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*/
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public class FolderIconPreviewVerifier {
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private static final String TAG = "FolderPreviewVerifier";
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private final int mMaxGridCountX;
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private final int mMaxGridCountY;
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private final int mMaxItemsPerPage;
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private final int[] mGridSize = new int[] { 1, 1 };
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private int mNumItemsInFolder;
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private int mGridCountX;
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private boolean mDisplayingUpperLeftQuadrant = false;
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/**
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* Note: must call {@link #setFolderInfo(FolderInfo)} manually for verifier to work.
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*/
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public FolderIconPreviewVerifier(InvariantDeviceProfile profile) {
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mMaxGridCountX = profile.numFolderColumns;
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mMaxGridCountY = profile.numFolderRows;
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mMaxItemsPerPage = mMaxGridCountX * mMaxGridCountY;
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}
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public void setFolderInfo(FolderInfo info) {
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int numItemsInFolder = info.contents.size();
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if (numItemsInFolder != mNumItemsInFolder) {
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FolderPagedView.calculateGridSize(numItemsInFolder, 0, 0, mMaxGridCountX,
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mMaxGridCountY, mMaxItemsPerPage, mGridSize);
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mGridCountX = mGridSize[0];
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mDisplayingUpperLeftQuadrant = numItemsInFolder > MAX_NUM_ITEMS_IN_PREVIEW;
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mNumItemsInFolder = numItemsInFolder;
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}
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}
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/**
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* Returns whether the item with {@param rank} is in the default Folder icon preview.
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*/
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public boolean isItemInPreview(int rank) {
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return isItemInPreview(0, rank);
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}
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/**
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* @param page The page the item is on.
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* @param rank The rank of the item.
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* @return True iff the icon is in the 2x2 upper left quadrant of the Folder.
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*/
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public boolean isItemInPreview(int page, int rank) {
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if (mGridSize[0] == 1) {
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Log.w(TAG, "setFolderInfo not called before checking if item is in preview.");
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}
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// First page items are laid out such that the first 4 items are always in the upper
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// left quadrant. For all other pages, we need to check the row and col.
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if (page > 0 || mDisplayingUpperLeftQuadrant) {
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int col = rank % mGridCountX;
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int row = rank / mGridCountX;
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return col < 2 && row < 2;
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}
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return rank < MAX_NUM_ITEMS_IN_PREVIEW;
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}
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}
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