InputHandler.h

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#pragma once
 
#include <array>
#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)
 
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);
    void FeedMouseButtons(int button, int action);
    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:
    using InputStateMap = std::unordered_map<size_t, IState>;
 
    void DownEvent(InputStateMap& map, size_t loc);
    void UpEvent(InputStateMap& map, size_t loc);
    std::uint32_t GetState(InputStateMap const& map, size_t loc);
 
    InputStateMap mScancodeMap;
    InputStateMap mKeycodeMap;
    InputStateMap mMouseMap;
 
    glm::vec2 mMousePosition{ -1.0f };
    std::array<glm::vec2, GLFW_MOUSE_BUTTON_LAST> mMousePositionSwitched;
 
    bool mMouseCapturedByUI{ false };
    bool mKeyboardCapturedByUI{ false };
 
    std::uint64_t mTick{ 0ULL };
 
};