1/*
2 * Copyright (C) 2015 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
17package com.android.launcher3.accessibility;
18
19import com.android.launcher3.CellLayout;
20import com.android.launcher3.FolderPagedView;
21import com.android.launcher3.R;
22
23/**
24 * Implementation of {@link DragAndDropAccessibilityDelegate} to support DnD in a folder.
25 */
26public class FolderAccessibilityHelper extends DragAndDropAccessibilityDelegate {
27
28    /**
29     * 0-index position for the first cell in {@link #mView} in {@link #mParent}.
30     */
31    private final int mStartPosition;
32
33    private final FolderPagedView mParent;
34
35    public FolderAccessibilityHelper(CellLayout layout) {
36        super(layout);
37        mParent = (FolderPagedView) layout.getParent();
38
39        int index = mParent.indexOfChild(layout);
40        mStartPosition = index * layout.getCountX() * layout.getCountY();
41    }
42    @Override
43    protected int intersectsValidDropTarget(int id) {
44        return Math.min(id, mParent.getAllocatedContentSize() - mStartPosition - 1);
45    }
46
47    @Override
48    protected String getLocationDescriptionForIconDrop(int id) {
49        return mContext.getString(R.string.move_to_position, id + mStartPosition + 1);
50    }
51
52    @Override
53    protected String getConfirmationForIconDrop(int id) {
54        return mContext.getString(R.string.item_moved);
55    }
56}
57