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#include "input.hpp"
#include <unistd.h>
void InputHandler::listen() const noexcept
{
char character = 0;
while (read(STDIN_FILENO, &character, 1) == 1)
{
notify_subscribers(character, nullptr);
}
}
void InputHandler::subscribe(
const Event &event, const std::shared_ptr<ISubscriber<Context>> &subscriber) noexcept
{
auto event_index = _event_as_index(event);
_subscribers.at(event_index).push_back(subscriber);
}
void InputHandler::notify_subscribers(const Event &event,
const Context &context) const noexcept
{
auto event_index = _event_as_index(event);
for (const auto &subscriber : _subscribers.at(event_index))
{
subscriber->update(context);
}
}
void InputHandler::enter_raw_mode() noexcept
{
if (_original_termios == nullptr)
{
_original_termios = std::make_shared<termios>();
}
tcgetattr(STDIN_FILENO, _original_termios.get());
auto raw_termios = termios(*_original_termios);
raw_termios.c_lflag &= static_cast<uint32_t>(~(ECHO | ICANON | ISIG));
tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_termios);
}
void InputHandler::leave_raw_mode() noexcept
{
if (_original_termios == nullptr)
{
return;
}
tcsetattr(STDIN_FILENO, TCSAFLUSH, _original_termios.get());
_original_termios = nullptr;
}
InputHandler::_SubscribersSizeType
InputHandler::_event_as_index(const Event &event) noexcept
{
return static_cast<_SubscribersSizeType>(static_cast<uint8_t>(event));
}
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