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.systemui.shortcut;
18 
19 import android.content.Context;
20 import android.content.res.Configuration;
21 import android.os.RemoteException;
22 import android.view.IWindowManager;
23 import android.view.KeyEvent;
24 import android.view.WindowManagerGlobal;
25 
26 import com.android.internal.policy.DividerSnapAlgorithm;
27 import com.android.systemui.SystemUI;
28 import com.android.systemui.dagger.SysUISingleton;
29 import com.android.wm.shell.legacysplitscreen.DividerView;
30 import com.android.wm.shell.legacysplitscreen.LegacySplitScreen;
31 
32 import java.util.Optional;
33 
34 import javax.inject.Inject;
35 
36 /**
37  * Dispatches shortcut to System UI components
38  */
39 @SysUISingleton
40 public class ShortcutKeyDispatcher extends SystemUI
41         implements ShortcutKeyServiceProxy.Callbacks {
42 
43     private static final String TAG = "ShortcutKeyDispatcher";
44     private final Optional<LegacySplitScreen> mSplitScreenOptional;
45 
46     private ShortcutKeyServiceProxy mShortcutKeyServiceProxy = new ShortcutKeyServiceProxy(this);
47     private IWindowManager mWindowManagerService = WindowManagerGlobal.getWindowManagerService();
48 
49     protected final long META_MASK = ((long) KeyEvent.META_META_ON) << Integer.SIZE;
50     protected final long ALT_MASK = ((long) KeyEvent.META_ALT_ON) << Integer.SIZE;
51     protected final long CTRL_MASK = ((long) KeyEvent.META_CTRL_ON) << Integer.SIZE;
52     protected final long SHIFT_MASK = ((long) KeyEvent.META_SHIFT_ON) << Integer.SIZE;
53 
54     protected final long SC_DOCK_LEFT = META_MASK | KeyEvent.KEYCODE_LEFT_BRACKET;
55     protected final long SC_DOCK_RIGHT = META_MASK | KeyEvent.KEYCODE_RIGHT_BRACKET;
56 
57     @Inject
ShortcutKeyDispatcher(Context context, Optional<LegacySplitScreen> splitScreenOptional)58     public ShortcutKeyDispatcher(Context context, Optional<LegacySplitScreen> splitScreenOptional) {
59         super(context);
60         mSplitScreenOptional = splitScreenOptional;
61     }
62 
63     /**
64      * Registers a shortcut key to window manager.
65      *
66      * @param shortcutCode packed representation of shortcut key code and meta information
67      */
registerShortcutKey(long shortcutCode)68     public void registerShortcutKey(long shortcutCode) {
69         try {
70             mWindowManagerService.registerShortcutKey(shortcutCode, mShortcutKeyServiceProxy);
71         } catch (RemoteException e) {
72             // Do nothing
73         }
74     }
75 
76     @Override
onShortcutKeyPressed(long shortcutCode)77     public void onShortcutKeyPressed(long shortcutCode) {
78         int orientation = mContext.getResources().getConfiguration().orientation;
79         if ((shortcutCode == SC_DOCK_LEFT || shortcutCode == SC_DOCK_RIGHT)
80                 && orientation == Configuration.ORIENTATION_LANDSCAPE) {
81             handleDockKey(shortcutCode);
82         }
83     }
84 
85     @Override
start()86     public void start() {
87         registerShortcutKey(SC_DOCK_LEFT);
88         registerShortcutKey(SC_DOCK_RIGHT);
89     }
90 
handleDockKey(long shortcutCode)91     private void handleDockKey(long shortcutCode) {
92         mSplitScreenOptional.ifPresent(splitScreen -> {
93             if (splitScreen.isDividerVisible()) {
94                 // If there is already a docked window, we respond by resizing the docking pane.
95                 DividerView dividerView = splitScreen.getDividerView();
96                 DividerSnapAlgorithm snapAlgorithm = dividerView.getSnapAlgorithm();
97                 int dividerPosition = dividerView.getCurrentPosition();
98                 DividerSnapAlgorithm.SnapTarget currentTarget =
99                         snapAlgorithm.calculateNonDismissingSnapTarget(dividerPosition);
100                 DividerSnapAlgorithm.SnapTarget target = (shortcutCode == SC_DOCK_LEFT)
101                         ? snapAlgorithm.getPreviousTarget(currentTarget)
102                         : snapAlgorithm.getNextTarget(currentTarget);
103                 dividerView.startDragging(true /* animate */, false /* touching */);
104                 dividerView.stopDragging(target.position, 0f, false /* avoidDismissStart */,
105                         true /* logMetrics */);
106                 return;
107             } else {
108                 splitScreen.splitPrimaryTask();
109             }
110         });
111     }
112 }
113