InputConsumerImpl.java revision 2769e7ebe9d9c5b7f1d10b21b32787b98522339f 
1/*
2 * Copyright (C) 2011 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 android.os.Looper;
20import android.os.Process;
21import android.view.Display;
22import android.view.InputChannel;
23import android.view.InputEventReceiver;
24import android.view.WindowManager;
25import android.view.WindowManagerPolicy;
26
27import com.android.server.input.InputApplicationHandle;
28import com.android.server.input.InputWindowHandle;
29
30public final class InputConsumerImpl implements WindowManagerPolicy.InputConsumer {
31    final WindowManagerService mService;
32    final InputChannel mServerChannel, mClientChannel;
33    final InputApplicationHandle mApplicationHandle;
34    final InputWindowHandle mWindowHandle;
35    final InputEventReceiver mInputEventReceiver;
36    final int mWindowLayer;
37
38    public InputConsumerImpl(WindowManagerService service, Looper looper,
39            InputEventReceiver.Factory inputEventReceiverFactory) {
40        String name = "input consumer";
41        mService = service;
42
43        InputChannel[] channels = InputChannel.openInputChannelPair(name);
44        mServerChannel = channels[0];
45        mClientChannel = channels[1];
46        mService.mInputManager.registerInputChannel(mServerChannel, null);
47
48        mInputEventReceiver = inputEventReceiverFactory.createInputEventReceiver(
49                mClientChannel, looper);
50
51        mApplicationHandle = new InputApplicationHandle(null);
52        mApplicationHandle.name = name;
53        mApplicationHandle.dispatchingTimeoutNanos =
54                WindowManagerService.DEFAULT_INPUT_DISPATCHING_TIMEOUT_NANOS;
55
56        mWindowHandle = new InputWindowHandle(mApplicationHandle, null, Display.DEFAULT_DISPLAY);
57        mWindowHandle.name = name;
58        mWindowHandle.inputChannel = mServerChannel;
59        mWindowHandle.layoutParamsType = WindowManager.LayoutParams.TYPE_INPUT_CONSUMER;
60        mWindowLayer = getLayerLw(mWindowHandle.layoutParamsType);
61        mWindowHandle.layer = mWindowLayer;
62        mWindowHandle.layoutParamsFlags = 0;
63        mWindowHandle.dispatchingTimeoutNanos =
64                WindowManagerService.DEFAULT_INPUT_DISPATCHING_TIMEOUT_NANOS;
65        mWindowHandle.visible = true;
66        mWindowHandle.canReceiveKeys = false;
67        mWindowHandle.hasFocus = false;
68        mWindowHandle.hasWallpaper = false;
69        mWindowHandle.paused = false;
70        mWindowHandle.ownerPid = Process.myPid();
71        mWindowHandle.ownerUid = Process.myUid();
72        mWindowHandle.inputFeatures = 0;
73        mWindowHandle.scaleFactor = 1.0f;
74    }
75
76    void layout(int dw, int dh) {
77        mWindowHandle.touchableRegion.set(0, 0, dw, dh);
78        mWindowHandle.frameLeft = 0;
79        mWindowHandle.frameTop = 0;
80        mWindowHandle.frameRight = dw;
81        mWindowHandle.frameBottom = dh;
82    }
83
84    @Override
85    public void dismiss() {
86        synchronized (mService.mWindowMap) {
87            if (mService.removeInputConsumer()) {
88                mInputEventReceiver.dispose();
89                mService.mInputManager.unregisterInputChannel(mServerChannel);
90                mClientChannel.dispose();
91                mServerChannel.dispose();
92            }
93        }
94    }
95
96    private int getLayerLw(int windowType) {
97        return mService.mPolicy.windowTypeToLayerLw(windowType)
98                * WindowManagerService.TYPE_LAYER_MULTIPLIER
99                + WindowManagerService.TYPE_LAYER_OFFSET;
100    }
101}
102