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#include "scene.hpp"
#include <fmt/core.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <unistd.h>
#include <cstdint>
#include <iostream>
#include "engine/escape.hpp"
class IComponent;
Scene::Scene(const IMatrixFactory<MatrixElement> &matrix_factory) noexcept
: _matrix(matrix_factory(size())), _is_shown(false)
{
_matrix->fill(' ');
}
void Scene::enter() noexcept
{
if (_is_shown || _original_termios != nullptr)
{
return;
}
// Enable alternative buffer
fmt::print(ENABLE_ALT_BUFFER, fmt::arg("esc", ESC));
std::cout.flush();
// Create a backup of the current terminal state
_original_termios = std::make_shared<termios>();
tcgetattr(STDIN_FILENO, _original_termios.get());
auto new_termios = termios(*_original_termios);
// Set the local mode flags of the new termios structure
//
// The following flags are disabled:
// ECHO - Echoing input characters
// ICANON - Canonical mode (line by line input)
// ISIG - Generate the corresponding signals for the characters
// INTR, QUIT, SUSP and DSUSP
new_termios.c_lflag &= static_cast<std::uint32_t>(~(ECHO | ICANON | ISIG));
// Set a new terminal state
tcsetattr(STDIN_FILENO, TCSAFLUSH, &new_termios);
_is_shown = true;
}
void Scene::leave() noexcept
{
if (!_is_shown || _original_termios == nullptr)
{
return;
}
// Disable alternative buffer
fmt::print(DISABLE_ALT_BUFFER, fmt::arg("esc", ESC));
std::cout.flush();
// Restore the original terminal state
tcsetattr(STDIN_FILENO, TCSAFLUSH, _original_termios.get());
_original_termios = nullptr;
_is_shown = false;
}
auto Scene::size() const noexcept -> Bounds
{
winsize window_size = {};
// NOLINTNEXTLINE(cppcoreguidelines-pro-type-vararg)
ioctl(0, TIOCGWINSZ, &window_size);
return Bounds({window_size.ws_col, window_size.ws_row});
}
auto Scene::get_matrix() const noexcept -> const std::shared_ptr<IMatrix<MatrixElement>> &
{
return _matrix;
}
void Scene::register_component(
const std::shared_ptr<IComponent> &component,
const Vector2 &position) noexcept
{
_components.emplace_back(std::make_pair(component, position));
}
auto Scene::get_components() const noexcept
-> std::vector<std::pair<std::shared_ptr<IComponent>, Vector2>>
{
return _components;
}
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