UI: Massive revamp, new features and improvements

src/frontend-common/sdl_input_source.h

@@ -0,0 +1,74 @@
+#pragma once
+#include "SDL.h"
+#include "input_source.h"
+#include <array>
+#include <functional>
+#include <mutex>
+#include <vector>
+
+class SettingsInterface;
+
+class SDLInputSource final : public InputSource
+{
+public:
+  SDLInputSource();
+  ~SDLInputSource();
+
+  bool Initialize(SettingsInterface& si, std::unique_lock<std::mutex>& settings_lock) override;
+  void UpdateSettings(SettingsInterface& si, std::unique_lock<std::mutex>& settings_lock) override;
+  void Shutdown() override;
+
+  void PollEvents() override;
+  std::vector<std::pair<std::string, std::string>> EnumerateDevices() override;
+  std::vector<InputBindingKey> EnumerateMotors() override;
+  bool GetGenericBindingMapping(const std::string_view& device, GenericInputBindingMapping* mapping) override;
+  void UpdateMotorState(InputBindingKey key, float intensity) override;
+  void UpdateMotorState(InputBindingKey large_key, InputBindingKey small_key, float large_intensity,
+                        float small_intensity) override;
+
+  std::optional<InputBindingKey> ParseKeyString(const std::string_view& device,
+                                                const std::string_view& binding) override;
+  std::string ConvertKeyToString(InputBindingKey key) override;
+
+  bool ProcessSDLEvent(const SDL_Event* event);
+
+private:
+  enum : int
+  {
+    MAX_NUM_AXES = 7,
+    MAX_NUM_BUTTONS = 16,
+  };
+
+  struct ControllerData
+  {
+    SDL_Haptic* haptic;
+    SDL_GameController* game_controller;
+    u16 rumble_intensity[2];
+    int haptic_left_right_effect;
+    int joystick_id;
+    int player_id;
+    bool use_game_controller_rumble;
+  };
+
+  using ControllerDataVector = std::vector<ControllerData>;
+
+  bool InitializeSubsystem();
+  void ShutdownSubsystem();
+  void LoadSettings(SettingsInterface& si);
+  void SetHints();
+
+  ControllerDataVector::iterator GetControllerDataForJoystickId(int id);
+  ControllerDataVector::iterator GetControllerDataForPlayerId(int id);
+  int GetFreePlayerId() const;
+
+  bool OpenGameController(int index);
+  bool CloseGameController(int joystick_index);
+  bool HandleControllerAxisEvent(const SDL_ControllerAxisEvent* event);
+  bool HandleControllerButtonEvent(const SDL_ControllerButtonEvent* event);
+  void SendRumbleUpdate(ControllerData* cd);
+
+  ControllerDataVector m_controllers;
+
+  bool m_sdl_subsystem_initialized = false;
+  bool m_controller_enhanced_mode = false;
+};