InputHandler.h

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#pragma once
 
#include <cstdint>
#include <unordered_map>
 
#define GLFW_INCLUDE_NONE
#include <GLFW/glfw3.h>
#include <glm/vec2.hpp>
 
/*----------------------------------------------------------------------------*/
 
#define PRESSED                     (1 << 0)
#define RELEASED                    (1 << 1)
#define JUST_PRESSED                (1 << 2)
#define JUST_RELEASED               (1 << 3)
 
#define MAX_MOUSE_BUTTONS           8
 
class InputHandler
{
public:
    struct IState {
        std::uint64_t mDownTick{std::numeric_limits<std::uint64_t>::max()};
        std::uint64_t mUpTick{std::numeric_limits<std::uint64_t>::max()};
        bool mIsDown{false};
    };
 
public:
    InputHandler();
 
public:
    void FeedKeyboard(int key, int scancode, int action, int mods);
    void FeedMouseButtons(int button, int action, int mods);
    void FeedMouseMotion(glm::vec2 const& position);
    void Advance();
    std::uint32_t GetScancodeState(int scancode);
    std::uint32_t GetKeycodeState(int key);
    std::uint32_t GetMouseState(std::uint32_t button);
    glm::vec2 GetMousePositionAtStateShift(std::uint32_t button);
    glm::vec2 GetMousePosition();
    bool IsMouseCapturedByUI() const;
    bool IsKeyboardCapturedByUI() const;
    void SetUICapture(bool mouseCapture, bool keyboardCapture);
 
private:
    void DownEvent(std::unordered_map<size_t, IState> &map, size_t loc);
    void DownModEvent(std::unordered_map<size_t, IState> &map, std::uint32_t mods);
    void UpEvent(std::unordered_map<size_t, IState> &map, size_t loc);
    void UpModEvent(std::unordered_map<size_t, IState> &map, std::uint32_t mods);
 
    std::uint32_t GetState(std::unordered_map<size_t, IState> &map, size_t loc);
 
    std::unordered_map<size_t, IState> mScancodeMap;
    std::unordered_map<size_t, IState> mKeycodeMap;
    std::unordered_map<size_t, IState> mMouseMap;
 
    glm::vec2 mMousePosition;
    glm::vec2 mMousePositionSwitched[MAX_MOUSE_BUTTONS];
 
    bool mMouseCapturedByUI;
    bool mKeyboardCapturedByUI;
 
    std::uint64_t mTick;
 
};