1/*
2 * Copyright (C) 2016 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.server.wm;
18
19import static android.app.ActivityManager.StackId.DOCKED_STACK_ID;
20import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID;
21import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID;
22import static android.app.ActivityManager.StackId.HOME_STACK_ID;
23import static android.app.ActivityManager.StackId.RECENTS_STACK_ID;
24
25/**
26 * Describes the mode in which a window is drag resizing.
27 */
28class DragResizeMode {
29
30    /**
31     * Freeform mode: Client surface is fullscreen, and client is responsible to draw window at
32     * the correct position.
33     */
34    static final int DRAG_RESIZE_MODE_FREEFORM = 0;
35
36    /**
37     * Mode for resizing the docked (and adjacent) stack: Client surface is fullscreen, but window
38     * is drawn at (0, 0), window manager is responsible for positioning the surface when draging.
39     */
40    static final int DRAG_RESIZE_MODE_DOCKED_DIVIDER = 1;
41
42    static boolean isModeAllowedForStack(int stackId, int mode) {
43        switch (mode) {
44            case DRAG_RESIZE_MODE_FREEFORM:
45                return stackId == FREEFORM_WORKSPACE_STACK_ID;
46            case DRAG_RESIZE_MODE_DOCKED_DIVIDER:
47                return stackId == DOCKED_STACK_ID
48                        || stackId == FULLSCREEN_WORKSPACE_STACK_ID
49                        || stackId == HOME_STACK_ID
50                        || stackId == RECENTS_STACK_ID;
51            default:
52                return false;
53        }
54    }
55}
56