michael@0: /*
michael@0:  * Copyright (C) 2010 The Android Open Source Project
michael@0:  *
michael@0:  * Licensed under the Apache License, Version 2.0 (the "License");
michael@0:  * you may not use this file except in compliance with the License.
michael@0:  * You may obtain a copy of the License at
michael@0:  *
michael@0:  *      http://www.apache.org/licenses/LICENSE-2.0
michael@0:  *
michael@0:  * Unless required by applicable law or agreed to in writing, software
michael@0:  * distributed under the License is distributed on an "AS IS" BASIS,
michael@0:  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
michael@0:  * See the License for the specific language governing permissions and
michael@0:  * limitations under the License.
michael@0:  */
michael@0: 
michael@0: #ifndef _UI_INPUT_MANAGER_H
michael@0: #define _UI_INPUT_MANAGER_H
michael@0: 
michael@0: /**
michael@0:  * Native input manager.
michael@0:  */
michael@0: 
michael@0: #include "EventHub.h"
michael@0: #include "InputReader.h"
michael@0: #include "InputDispatcher.h"
michael@0: 
michael@0: #include "Input.h"
michael@0: #include "InputTransport.h"
michael@0: #include <utils/Errors.h>
michael@0: #include <utils/Vector.h>
michael@0: #include <utils/Timers.h>
michael@0: #include <utils/RefBase.h>
michael@0: #include <utils/String8.h>
michael@0: 
michael@0: namespace android {
michael@0: 
michael@0: /*
michael@0:  * The input manager is the core of the system event processing.
michael@0:  *
michael@0:  * The input manager uses two threads.
michael@0:  *
michael@0:  * 1. The InputReaderThread (called "InputReader") reads and preprocesses raw input events,
michael@0:  *    applies policy, and posts messages to a queue managed by the DispatcherThread.
michael@0:  * 2. The InputDispatcherThread (called "InputDispatcher") thread waits for new events on the
michael@0:  *    queue and asynchronously dispatches them to applications.
michael@0:  *
michael@0:  * By design, the InputReaderThread class and InputDispatcherThread class do not share any
michael@0:  * internal state.  Moreover, all communication is done one way from the InputReaderThread
michael@0:  * into the InputDispatcherThread and never the reverse.  Both classes may interact with the
michael@0:  * InputDispatchPolicy, however.
michael@0:  *
michael@0:  * The InputManager class never makes any calls into Java itself.  Instead, the
michael@0:  * InputDispatchPolicy is responsible for performing all external interactions with the
michael@0:  * system, including calling DVM services.
michael@0:  */
michael@0: class InputManagerInterface : public virtual RefBase {
michael@0: protected:
michael@0:     InputManagerInterface() { }
michael@0:     virtual ~InputManagerInterface() { }
michael@0: 
michael@0: public:
michael@0:     /* Starts the input manager threads. */
michael@0:     virtual status_t start() = 0;
michael@0: 
michael@0:     /* Stops the input manager threads and waits for them to exit. */
michael@0:     virtual status_t stop() = 0;
michael@0: 
michael@0:     /* Gets the input reader. */
michael@0:     virtual sp<InputReaderInterface> getReader() = 0;
michael@0: 
michael@0:     /* Gets the input dispatcher. */
michael@0:     virtual sp<InputDispatcherInterface> getDispatcher() = 0;
michael@0: };
michael@0: 
michael@0: class InputManager : public InputManagerInterface {
michael@0: protected:
michael@0:     virtual ~InputManager();
michael@0: 
michael@0: public:
michael@0:     InputManager(
michael@0:             const sp<EventHubInterface>& eventHub,
michael@0:             const sp<InputReaderPolicyInterface>& readerPolicy,
michael@0:             const sp<InputDispatcherPolicyInterface>& dispatcherPolicy);
michael@0: 
michael@0:     // (used for testing purposes)
michael@0:     InputManager(
michael@0:             const sp<InputReaderInterface>& reader,
michael@0:             const sp<InputDispatcherInterface>& dispatcher);
michael@0: 
michael@0:     virtual status_t start();
michael@0:     virtual status_t stop();
michael@0: 
michael@0:     virtual sp<InputReaderInterface> getReader();
michael@0:     virtual sp<InputDispatcherInterface> getDispatcher();
michael@0: 
michael@0: private:
michael@0:     sp<InputReaderInterface> mReader;
michael@0:     sp<InputReaderThread> mReaderThread;
michael@0: 
michael@0:     sp<InputDispatcherInterface> mDispatcher;
michael@0:     sp<InputDispatcherThread> mDispatcherThread;
michael@0: 
michael@0:     void initialize();
michael@0: };
michael@0: 
michael@0: } // namespace android
michael@0: 
michael@0: #endif // _UI_INPUT_MANAGER_H