EvdevInputSource: Migrate to new abstractions

src/frontend-common/evdev_input_source.h

@@ -0,0 +1,88 @@
+#pragma once
+#include "core/types.h"
+#include "input_source.h"
+#include <array>
+#include <functional>
+#include <libevdev/libevdev.h>
+#include <mutex>
+#include <vector>
+
+class EvdevInputSource final : public InputSource
+{
+public:
+  EvdevInputSource();
+  ~EvdevInputSource() override;
+
+  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;
+
+private:
+  struct ControllerData
+  {
+    ControllerData(int fd_, struct libevdev* obj_);
+    ControllerData(const ControllerData&) = delete;
+    ControllerData(ControllerData&& move);
+    ~ControllerData();
+
+    ControllerData& operator=(const ControllerData&) = delete;
+    ControllerData& operator=(ControllerData&& move);
+
+    struct libevdev* obj = nullptr;
+    int fd = -1;
+    int controller_id = 0;
+    u32 num_motors = 0;
+
+    float deadzone = 0.25f;
+
+    struct Axis
+    {
+      std::string name;
+      u32 id;
+      s32 min;
+      s32 range;
+      u32 neg_button;
+      u32 pos_button;
+      GenericInputBinding neg_generic;
+      GenericInputBinding pos_generic;
+      float last_value;
+    };
+
+    struct Button
+    {
+      Button() = default;
+      Button(std::string name_, u32 id_, GenericInputBinding generic_)
+        : name(std::move(name_)), id(id_), generic(generic_)
+      {
+      }
+
+      std::string name;
+      u32 id;
+      GenericInputBinding generic;
+    };
+
+    std::string uniq;
+    std::string name;
+    std::vector<Axis> axes;
+    std::vector<Button> buttons;
+  };
+
+  ControllerData* GetControllerById(int id);
+  ControllerData* GetControllerByUniq(const std::string_view& uniq);
+  bool InitializeController(int index, ControllerData* cd);
+  void HandleControllerEvents(ControllerData* cd);
+
+  std::vector<ControllerData> m_controllers;
+};