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/*
* Copyright (C) 2015 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 ANDROID_INPUT_HOST_H_
#define ANDROID_INPUT_HOST_H_
#include <hardware/input.h>
namespace android {
/**
* Classes in this file wrap the corresponding interfaces in the Input HAL. They
* are intended to be lightweight and passed by value. It is still important not
* to use an object after a HAL-specific method has freed the underlying
* representation.
*
* See hardware/input.h for details about each of these methods.
*/
using InputBus = input_bus_t;
using InputCollectionId = input_collection_id_t;
using InputDeviceHandle = input_device_handle_t*;
using InputDeviceIdentifier = input_device_identifier_t*;
using InputUsage = input_usage_t;
class InputHostBase {
protected:
InputHostBase(input_host_t* host, input_host_callbacks_t cb) : mHost(host), mCallbacks(cb) {}
virtual ~InputHostBase() = default;
input_host_t* mHost;
input_host_callbacks_t mCallbacks;
};
class InputReport : private InputHostBase {
public:
virtual ~InputReport() = default;
InputReport(const InputReport& rhs) = default;
InputReport& operator=(const InputReport& rhs) = default;
operator input_report_t*() const { return mReport; }
void reportEvent(InputDeviceHandle d);
private:
friend class InputReportDefinition;
InputReport(input_host_t* host, input_host_callbacks_t cb, input_report_t* r) :
InputHostBase(host, cb), mReport(r) {}
input_report_t* mReport;
};
class InputReportDefinition : private InputHostBase {
public:
virtual ~InputReportDefinition() = default;
InputReportDefinition(const InputReportDefinition& rhs) = default;
InputReportDefinition& operator=(const InputReportDefinition& rhs) = default;
operator input_report_definition_t*() { return mReportDefinition; }
void addCollection(InputCollectionId id, int32_t arity);
void declareUsage(InputCollectionId id, InputUsage usage, int32_t min, int32_t max,
float resolution);
void declareUsage(InputCollectionId id, InputUsage* usage, size_t usageCount);
InputReport allocateReport();
private:
friend class InputHost;
InputReportDefinition(
input_host_t* host, input_host_callbacks_t cb, input_report_definition_t* r) :
InputHostBase(host, cb), mReportDefinition(r) {}
input_report_definition_t* mReportDefinition;
};
class InputDeviceDefinition : private InputHostBase {
public:
virtual ~InputDeviceDefinition() = default;
InputDeviceDefinition(const InputDeviceDefinition& rhs) = default;
InputDeviceDefinition& operator=(const InputDeviceDefinition& rhs) = default;
operator input_device_definition_t*() { return mDeviceDefinition; }
void addReport(InputReportDefinition r);
private:
friend class InputHost;
InputDeviceDefinition(
input_host_t* host, input_host_callbacks_t cb, input_device_definition_t* d) :
InputHostBase(host, cb), mDeviceDefinition(d) {}
input_device_definition_t* mDeviceDefinition;
};
class InputHost : private InputHostBase {
public:
InputHost(input_host_t* host, input_host_callbacks_t cb) : InputHostBase(host, cb) {}
virtual ~InputHost() = default;
InputHost(const InputHost& rhs) = default;
InputHost& operator=(const InputHost& rhs) = default;
InputDeviceIdentifier createDeviceIdentifier(const char* name, int32_t productId,
int32_t vendorId, InputBus bus, const char* uniqueId);
InputDeviceDefinition createDeviceDefinition();
InputReportDefinition createInputReportDefinition();
InputReportDefinition createOutputReportDefinition();
InputDeviceHandle registerDevice(InputDeviceIdentifier id, InputDeviceDefinition d);
void unregisterDevice(InputDeviceHandle handle);
};
} // namespace android
#endif // ANDROID_INPUT_HOST_H_
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