action_mapping.hpp

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#pragma once
#include "le2d/input/action.hpp"
#include "le2d/input/mapping.hpp"
#include <functional>
#include <gsl/pointers>
#include <vector>
 
namespace le::input {
using OnAction = std::move_only_function<void(action::Value const&)>;
 
class ActionMapping : public IMapping {
  public:
    ActionMapping() = default;
 
    void bind_action(gsl::not_null<IAction*> action, OnAction on_action);
 
    void unbind_action(gsl::not_null<IAction const*> action);
 
    void clear_bindings() { m_bindings.clear(); }
 
    void dispatch(std::span<le::Event const> events, Gamepad::Manager const& gamepads) override;
 
    void disengage() override;
 
  private:
    template <typename F>
    void iterate(F f) const;
 
    struct Binding {
        gsl::not_null<IAction*> action;
        std::vector<OnAction> callbacks{};
 
        void update_gamepad(Gamepad::Manager const& gamepads) const;
        void dispatch();
    };
 
    std::vector<Binding> m_bindings{};
};
} // namespace le::input