1 /*
2  * Copyright (C) 2013 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 #ifndef _ANDROID_VIEW_INPUTQUEUE_H
18 #define _ANDROID_VIEW_INPUTQUEUE_H
19 
20 #include <input/Input.h>
21 #include <utils/Looper.h>
22 #include <utils/TypeHelpers.h>
23 #include <utils/Vector.h>
24 
25 #include <nativehelper/JNIHelp.h>
26 
27 /*
28  * Declare a concrete type for the NDK's AInputQueue forward declaration
29  */
30 struct AInputQueue{
31 };
32 
33 namespace android {
34 
35 class InputQueue : public AInputQueue, public MessageHandler {
36 public:
37     virtual ~InputQueue();
38 
39     void attachLooper(Looper* looper, int ident, ALooper_callbackFunc callback, void* data);
40 
41     void detachLooper();
42 
43     bool hasEvents();
44 
45     status_t getEvent(InputEvent** outEvent);
46 
47     bool preDispatchEvent(InputEvent* event);
48 
49     void finishEvent(InputEvent* event, bool handled);
50 
51     KeyEvent* createKeyEvent();
52 
53     MotionEvent* createMotionEvent();
54 
55     void recycleInputEvent(InputEvent* event);
56 
57     void enqueueEvent(InputEvent* event);
58 
59     static InputQueue* createQueue(jobject inputQueueObj, const sp<Looper>& looper);
60 
61 protected:
62     virtual void handleMessage(const Message& message);
63 
64 private:
65     InputQueue(jobject inputQueueObj, const sp<Looper>& looper,
66             int readDispatchFd, int writeDispatchFd);
67 
68     void detachLooperLocked();
69 
70     jobject mInputQueueWeakGlobal;
71     int mDispatchReadFd;
72     int mDispatchWriteFd;
73     Vector<Looper*> mAppLoopers;
74     sp<Looper> mDispatchLooper;
75     sp<WeakMessageHandler> mHandler;
76     PooledInputEventFactory mPooledInputEventFactory;
77     // Guards the pending and finished event vectors
78     mutable Mutex mLock;
79     Vector<InputEvent*> mPendingEvents;
80     Vector<key_value_pair_t<InputEvent*, bool> > mFinishedEvents;
81 };
82 
83 } // namespace android
84 
85 #endif
86