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