From 9e1b0af25907f7a8b960aa5c1e7d931691f40196 Mon Sep 17 00:00:00 2001 From: Lioncash Date: Thu, 27 Aug 2020 15:16:47 -0400 Subject: input_common: Eliminate most global state Abstracts most of the input mechanisms under an InputSubsystem class that is managed by the frontends, eliminating any static constructors and destructors. This gets rid of global accessor functions and also allows the frontends to have a more fine-grained control over the lifecycle of the input subsystem. This also makes it explicit which interfaces rely on the input subsystem instead of making it opaque in the interface functions. All that remains to migrate over is the factories, which can be done in a separate change. --- src/input_common/main.h | 130 +++++++++++++++++++++++++++++++----------------- 1 file changed, 84 insertions(+), 46 deletions(-) (limited to 'src/input_common/main.h') diff --git a/src/input_common/main.h b/src/input_common/main.h index e706c3750..f66308163 100644 --- a/src/input_common/main.h +++ b/src/input_common/main.h @@ -16,52 +16,6 @@ class ParamPackage; } namespace InputCommon { - -/// Initializes and registers all built-in input device factories. -void Init(); - -/// Deregisters all built-in input device factories and shuts them down. -void Shutdown(); - -class Keyboard; - -/// Gets the keyboard button device factory. -Keyboard* GetKeyboard(); - -class MotionEmu; - -/// Gets the motion emulation factory. -MotionEmu* GetMotionEmu(); - -GCButtonFactory* GetGCButtons(); - -GCAnalogFactory* GetGCAnalogs(); - -/// Generates a serialized param package for creating a keyboard button device -std::string GenerateKeyboardParam(int key_code); - -/// Generates a serialized param package for creating an analog device taking input from keyboard -std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right, - int key_modifier, float modifier_scale); - -/** - * Return a list of available input devices that this Factory can create a new device with. - * Each returned Parampackage should have a `display` field used for display, a class field for - * backends to determine if this backend is meant to service the request and any other information - * needed to identify this in the backend later. - */ -std::vector GetInputDevices(); - -/** - * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default - * mapping for the device. This is currently only implemented for the sdl backend devices. - */ -using ButtonMapping = std::unordered_map; -using AnalogMapping = std::unordered_map; - -ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage&); -AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage&); - namespace Polling { enum class DeviceType { Button, AnalogPreferred }; @@ -90,4 +44,88 @@ public: // Get all DevicePoller from all backends for a specific device type std::vector> GetPollers(DeviceType type); } // namespace Polling + +class GCAnalogFactory; +class GCButtonFactory; +class Keyboard; +class MotionEmu; + +/** + * Given a ParamPackage for a Device returned from `GetInputDevices`, attempt to get the default + * mapping for the device. This is currently only implemented for the SDL backend devices. + */ +using AnalogMapping = std::unordered_map; +using ButtonMapping = std::unordered_map; + +class InputSubsystem { +public: + explicit InputSubsystem(); + ~InputSubsystem(); + + InputSubsystem(const InputSubsystem&) = delete; + InputSubsystem& operator=(const InputSubsystem&) = delete; + + InputSubsystem(InputSubsystem&&) = delete; + InputSubsystem& operator=(InputSubsystem&&) = delete; + + /// Initializes and registers all built-in input device factories. + void Initialize(); + + /// Unregisters all built-in input device factories and shuts them down. + void Shutdown(); + + /// Retrieves the underlying keyboard device. + [[nodiscard]] Keyboard* GetKeyboard(); + + /// Retrieves the underlying keyboard device. + [[nodiscard]] const Keyboard* GetKeyboard() const; + + /// Retrieves the underlying motion emulation factory. + [[nodiscard]] MotionEmu* GetMotionEmu(); + + /// Retrieves the underlying motion emulation factory. + [[nodiscard]] const MotionEmu* GetMotionEmu() const; + + /** + * Returns all available input devices that this Factory can create a new device with. + * Each returned ParamPackage should have a `display` field used for display, a class field for + * backends to determine if this backend is meant to service the request and any other + * information needed to identify this in the backend later. + */ + [[nodiscard]] std::vector GetInputDevices() const; + + /// Retrieves the analog mappings for the given device. + [[nodiscard]] AnalogMapping GetAnalogMappingForDevice(const Common::ParamPackage& device) const; + + /// Retrieves the button mappings for the given device. + [[nodiscard]] ButtonMapping GetButtonMappingForDevice(const Common::ParamPackage& device) const; + + /// Retrieves the underlying GameCube analog handler. + [[nodiscard]] GCAnalogFactory* GetGCAnalogs(); + + /// Retrieves the underlying GameCube analog handler. + [[nodiscard]] const GCAnalogFactory* GetGCAnalogs() const; + + /// Retrieves the underlying GameCube button handler. + [[nodiscard]] GCButtonFactory* GetGCButtons(); + + /// Retrieves the underlying GameCube button handler. + [[nodiscard]] const GCButtonFactory* GetGCButtons() const; + + /// Get all DevicePoller from all backends for a specific device type + [[nodiscard]] std::vector> GetPollers( + Polling::DeviceType type) const; + +private: + struct Impl; + std::unique_ptr impl; +}; + +/// Generates a serialized param package for creating a keyboard button device +std::string GenerateKeyboardParam(int key_code); + +/// Generates a serialized param package for creating an analog device taking input from keyboard +std::string GenerateAnalogParamFromKeys(int key_up, int key_down, int key_left, int key_right, + int key_modifier, float modifier_scale); + } // namespace InputCommon -- cgit v1.2.3