FrontendCommon: Move input binding and some other logic from Qt to common

src/frontend-common/common_host_interface.h

@@ -0,0 +1,65 @@
+#pragma once
+#include "core/host_interface.h"
+#include "common/string.h"
+#include <atomic>
+#include <functional>
+#include <map>
+#include <memory>
+#include <mutex>
+#include <string_view>
+#include <utility>
+#include <optional>
+#include <vector>
+
+class CommonHostInterface : public HostInterface
+{
+public:
+  using HostKeyCode = s32;
+
+  using InputButtonHandler = std::function<void(bool)>;
+  using InputAxisHandler = std::function<void(float)>;
+
+  struct HotkeyInfo
+  {
+    String category;
+    String name;
+    String display_name;
+    InputButtonHandler handler;
+  };
+
+  using HotkeyInfoList = std::vector<HotkeyInfo>;
+
+  /// Returns a list of all available hotkeys.
+  const HotkeyInfoList& GetHotkeyInfoList() const { return m_hotkeys; }
+
+protected:
+  CommonHostInterface();
+  ~CommonHostInterface();
+
+  virtual void SetFullscreen(bool enabled);
+  virtual void ToggleFullscreen();
+
+  virtual std::unique_ptr<AudioStream> CreateAudioStream(AudioBackend backend) override;
+
+  virtual void SetDefaultSettings(SettingsInterface& si) override;
+
+  virtual std::optional<HostKeyCode> GetHostKeyCode(const std::string_view key_code) const;
+
+  void RegisterHotkey(String category, String name, String display_name, InputButtonHandler handler);
+  bool HandleHostKeyEvent(HostKeyCode code, bool pressed);
+  void UpdateInputMap(SettingsInterface& si);
+
+private:
+  void RegisterGeneralHotkeys();
+  void RegisterGraphicsHotkeys();
+  void RegisterSaveStateHotkeys();
+  void UpdateControllerInputMap(SettingsInterface& si);
+  void UpdateHotkeyInputMap(SettingsInterface& si);
+  void AddButtonToInputMap(const std::string& binding, InputButtonHandler handler);
+  void AddAxisToInputMap(const std::string& binding, InputAxisHandler handler);
+
+  HotkeyInfoList m_hotkeys;
+
+  // input key maps
+  std::map<HostKeyCode, InputButtonHandler> m_keyboard_input_handlers;
+};