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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _UI_INPUT_MANAGER_H
#define _UI_INPUT_MANAGER_H
/**
* Native input manager.
*/
#include "InputClassifier.h"
#include "InputReaderBase.h"
#include <InputDispatcherInterface.h>
#include <InputDispatcherPolicyInterface.h>
#include <android/os/ISetInputWindowsListener.h>
#include <input/Input.h>
#include <input/InputTransport.h>
#include <android/os/BnInputFlinger.h>
#include <android/os/IInputFlinger.h>
#include <utils/Errors.h>
#include <utils/RefBase.h>
#include <utils/Timers.h>
#include <utils/Vector.h>
using android::os::BnInputFlinger;
using android::os::ISetInputWindowsListener;
namespace android {
class InputChannel;
class InputDispatcherThread;
/*
* The input manager is the core of the system event processing.
*
* The input manager has three components.
*
* 1. The InputReader class starts a thread that reads and preprocesses raw input events, applies
* policy, and posts messages to a queue managed by the InputClassifier.
* 2. The InputClassifier class starts a thread to communicate with the device-specific
* classifiers. It then waits on the queue of events from InputReader, applies a classification
* to them, and queues them for the InputDispatcher.
* 3. The InputDispatcher class starts a thread that waits for new events on the
* previous queue and asynchronously dispatches them to applications.
*
* By design, none of these classes share any internal state. Moreover, all communication is
* done one way from the InputReader to the InputDispatcher and never the reverse. All
* classes may interact with the InputDispatchPolicy, however.
*
* The InputManager class never makes any calls into Java itself. Instead, the
* InputDispatchPolicy is responsible for performing all external interactions with the
* system, including calling DVM services.
*/
class InputManagerInterface : public virtual RefBase {
protected:
InputManagerInterface() { }
virtual ~InputManagerInterface() { }
public:
/* Starts the input threads. */
virtual status_t start() = 0;
/* Stops the input threads and waits for them to exit. */
virtual status_t stop() = 0;
/* Gets the input reader. */
virtual sp<InputReaderInterface> getReader() = 0;
/* Gets the input classifier */
virtual sp<InputClassifierInterface> getClassifier() = 0;
/* Gets the input dispatcher. */
virtual sp<InputDispatcherInterface> getDispatcher() = 0;
};
class InputManager : public InputManagerInterface, public BnInputFlinger {
protected:
~InputManager() override;
public:
InputManager(
const sp<InputReaderPolicyInterface>& readerPolicy,
const sp<InputDispatcherPolicyInterface>& dispatcherPolicy);
status_t start() override;
status_t stop() override;
sp<InputReaderInterface> getReader() override;
sp<InputClassifierInterface> getClassifier() override;
sp<InputDispatcherInterface> getDispatcher() override;
status_t dump(int fd, const Vector<String16>& args) override;
binder::Status setInputWindows(
const std::vector<InputWindowInfo>& handles,
const sp<ISetInputWindowsListener>& setInputWindowsListener) override;
binder::Status createInputChannel(const std::string& name, InputChannel* outChannel) override;
binder::Status removeInputChannel(const sp<IBinder>& connectionToken) override;
binder::Status setFocusedWindow(const FocusRequest&) override;
private:
sp<InputReaderInterface> mReader;
sp<InputClassifierInterface> mClassifier;
sp<InputDispatcherInterface> mDispatcher;
};
} // namespace android
#endif // _UI_INPUT_MANAGER_H
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