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Diffstat (limited to '')
-rw-r--r-- | src/core/frontend/input.h | 97 |
1 files changed, 97 insertions, 0 deletions
diff --git a/src/core/frontend/input.h b/src/core/frontend/input.h new file mode 100644 index 000000000..a0c51df0c --- /dev/null +++ b/src/core/frontend/input.h @@ -0,0 +1,97 @@ +// Copyright 2017 Citra Emulator Project +// Licensed under GPLv2 or any later version +// Refer to the license.txt file included. + +#pragma once + +#include <memory> +#include <string> +#include <tuple> +#include <unordered_map> +#include <utility> +#include "common/logging/log.h" +#include "common/param_package.h" + +namespace Input { + +/// An abstract class template for an input device (a button, an analog input, etc.). +template <typename StatusType> +class InputDevice { +public: + virtual ~InputDevice() = default; + virtual StatusType GetStatus() const { + return {}; + } +}; + +/// An abstract class template for a factory that can create input devices. +template <typename InputDeviceType> +class Factory { +public: + virtual ~Factory() = default; + virtual std::unique_ptr<InputDeviceType> Create(const Common::ParamPackage&) = 0; +}; + +namespace Impl { + +template <typename InputDeviceType> +using FactoryListType = std::unordered_map<std::string, std::shared_ptr<Factory<InputDeviceType>>>; + +template <typename InputDeviceType> +struct FactoryList { + static FactoryListType<InputDeviceType> list; +}; + +template <typename InputDeviceType> +FactoryListType<InputDeviceType> FactoryList<InputDeviceType>::list; + +} // namespace Impl + +/** + * Registers an input device factory. + * @tparam InputDeviceType the type of input devices the factory can create + * @param name the name of the factory. Will be used to match the "engine" parameter when creating + * a device + * @param factory the factory object to register + */ +template <typename InputDeviceType> +void RegisterFactory(const std::string& name, std::shared_ptr<Factory<InputDeviceType>> factory) { + auto pair = std::make_pair(name, std::move(factory)); + if (!Impl::FactoryList<InputDeviceType>::list.insert(std::move(pair)).second) { + LOG_ERROR(Input, "Factory %s already registered", name.c_str()); + } +} + +/** + * Unregisters an input device factory. + * @tparam InputDeviceType the type of input devices the factory can create + * @param name the name of the factory to unregister + */ +template <typename InputDeviceType> +void UnregisterFactory(const std::string& name) { + if (Impl::FactoryList<InputDeviceType>::list.erase(name) == 0) { + LOG_ERROR(Input, "Factory %s not registered", name.c_str()); + } +} + +/** + * Create an input device from given paramters. + * @tparam InputDeviceType the type of input devices to create + * @param params a serialized ParamPackage string contains all parameters for creating the device + */ +template <typename InputDeviceType> +std::unique_ptr<InputDeviceType> CreateDevice(const std::string& params) { + const Common::ParamPackage package(params); + const std::string engine = package.Get("engine", "null"); + const auto& factory_list = Impl::FactoryList<InputDeviceType>::list; + const auto pair = factory_list.find(engine); + if (pair == factory_list.end()) { + if (engine != "null") { + LOG_ERROR(Input, "Unknown engine name: %s", engine.c_str()); + } + return std::make_unique<InputDeviceType>(); + } + return pair->second->Create(package); +} + +} // namespace Input |