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#pragma once
#include "nes/app/input/key.hh"
#include "nes/common/containers/list.hh"
namespace nes::app
{
class input_event;
/// A buffer which stores the "pressed" state for each key and a queue of key-down and key-up events.
class input_buffer
{
struct event final : list<event>::node
{
bool pressed{ false };
};
event key_events_[key_count]{};
list<event> event_queue_;
public:
explicit input_buffer() = default;
input_buffer(input_buffer const&) = delete;
input_buffer(input_buffer&&) = delete;
auto operator=(input_buffer const&) -> input_buffer& = delete;
auto operator=(input_buffer&&) -> input_buffer& = delete;
/// Record a key-down event.
auto key_down(key) -> void;
/// Record a key-up event.
auto key_up(key) -> void;
auto read_key(key) -> bool;
auto poll_event() -> input_event;
private:
auto get_event(key) -> event&;
auto get_key(event const&) -> key;
auto set_pressed(key, bool) -> void;
};
} // namespace nes::app
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