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/*
* 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 android.util.Log;
import com.android.launcher3.FolderInfo;
import com.android.launcher3.InvariantDeviceProfile;
import static com.android.launcher3.folder.ClippedFolderIconLayoutRule.MAX_NUM_ITEMS_IN_PREVIEW;
/**
* Verifies whether an item in a Folder is displayed in the FolderIcon preview.
*/
public class FolderIconPreviewVerifier {
private static final String TAG = "FolderPreviewVerifier";
private final int mMaxGridCountX;
private final int mMaxGridCountY;
private final int mMaxItemsPerPage;
private final int[] mGridSize = new int[] { 1, 1 };
private int mNumItemsInFolder;
private int mGridCountX;
private boolean mDisplayingUpperLeftQuadrant = false;
/**
* Note: must call {@link #setFolderInfo(FolderInfo)} manually for verifier to work.
*/
public FolderIconPreviewVerifier(InvariantDeviceProfile profile) {
mMaxGridCountX = profile.numFolderColumns;
mMaxGridCountY = profile.numFolderRows;
mMaxItemsPerPage = mMaxGridCountX * mMaxGridCountY;
}
public void setFolderInfo(FolderInfo info) {
int numItemsInFolder = info.contents.size();
if (numItemsInFolder != mNumItemsInFolder) {
FolderPagedView.calculateGridSize(numItemsInFolder, 0, 0, mMaxGridCountX,
mMaxGridCountY, mMaxItemsPerPage, mGridSize);
mGridCountX = mGridSize[0];
mDisplayingUpperLeftQuadrant = numItemsInFolder > MAX_NUM_ITEMS_IN_PREVIEW;
mNumItemsInFolder = numItemsInFolder;
}
}
/**
* 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) {
if (mGridSize[0] == 1) {
Log.w(TAG, "setFolderInfo not called before checking if item is in preview.");
}
// 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 < MAX_NUM_ITEMS_IN_PREVIEW;
}
}
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