1 /* 2 * Copyright (C) 2010 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 _UI_INPUT_MANAGER_H 18 #define _UI_INPUT_MANAGER_H 19 20 /** 21 * Native input manager. 22 */ 23 24 #include "EventHub.h" 25 #include "InputReader.h" 26 #include "InputDispatcher.h" 27 28 #include <androidfw/Input.h> 29 #include <androidfw/InputTransport.h> 30 #include <utils/Errors.h> 31 #include <utils/Vector.h> 32 #include <utils/Timers.h> 33 #include <utils/RefBase.h> 34 #include <utils/String8.h> 35 36 namespace android { 37 38 /* 39 * The input manager is the core of the system event processing. 40 * 41 * The input manager uses two threads. 42 * 43 * 1. The InputReaderThread (called "InputReader") reads and preprocesses raw input events, 44 * applies policy, and posts messages to a queue managed by the DispatcherThread. 45 * 2. The InputDispatcherThread (called "InputDispatcher") thread waits for new events on the 46 * queue and asynchronously dispatches them to applications. 47 * 48 * By design, the InputReaderThread class and InputDispatcherThread class do not share any 49 * internal state. Moreover, all communication is done one way from the InputReaderThread 50 * into the InputDispatcherThread and never the reverse. Both classes may interact with the 51 * InputDispatchPolicy, however. 52 * 53 * The InputManager class never makes any calls into Java itself. Instead, the 54 * InputDispatchPolicy is responsible for performing all external interactions with the 55 * system, including calling DVM services. 56 */ 57 class InputManagerInterface : public virtual RefBase { 58 protected: InputManagerInterface()59 InputManagerInterface() { } ~InputManagerInterface()60 virtual ~InputManagerInterface() { } 61 62 public: 63 /* Starts the input manager threads. */ 64 virtual status_t start() = 0; 65 66 /* Stops the input manager threads and waits for them to exit. */ 67 virtual status_t stop() = 0; 68 69 /* Gets the input reader. */ 70 virtual sp<InputReaderInterface> getReader() = 0; 71 72 /* Gets the input dispatcher. */ 73 virtual sp<InputDispatcherInterface> getDispatcher() = 0; 74 }; 75 76 class InputManager : public InputManagerInterface { 77 protected: 78 virtual ~InputManager(); 79 80 public: 81 InputManager( 82 const sp<EventHubInterface>& eventHub, 83 const sp<InputReaderPolicyInterface>& readerPolicy, 84 const sp<InputDispatcherPolicyInterface>& dispatcherPolicy); 85 86 // (used for testing purposes) 87 InputManager( 88 const sp<InputReaderInterface>& reader, 89 const sp<InputDispatcherInterface>& dispatcher); 90 91 virtual status_t start(); 92 virtual status_t stop(); 93 94 virtual sp<InputReaderInterface> getReader(); 95 virtual sp<InputDispatcherInterface> getDispatcher(); 96 97 private: 98 sp<InputReaderInterface> mReader; 99 sp<InputReaderThread> mReaderThread; 100 101 sp<InputDispatcherInterface> mDispatcher; 102 sp<InputDispatcherThread> mDispatcherThread; 103 104 void initialize(); 105 }; 106 107 } // namespace android 108 109 #endif // _UI_INPUT_MANAGER_H 110