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 
17 package com.android.server.wm;
18 
19 import static android.app.ActivityManager.StackId.DOCKED_STACK_ID;
20 import static android.app.ActivityManager.StackId.FREEFORM_WORKSPACE_STACK_ID;
21 import static android.app.ActivityManager.StackId.FULLSCREEN_WORKSPACE_STACK_ID;
22 import static android.app.ActivityManager.StackId.HOME_STACK_ID;
23 import static android.app.ActivityManager.StackId.RECENTS_STACK_ID;
24 
25 /**
26  * Describes the mode in which a window is drag resizing.
27  */
28 class 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 
isModeAllowedForStack(int stackId, int mode)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