banan-os/userspace/programs/Terminal/Terminal.h

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#pragma once
#include <LibFont/Font.h>
#include <LibGUI/Window.h>
struct Rectangle
{
uint32_t x { 0 };
uint32_t y { 0 };
uint32_t width { 0 };
uint32_t height { 0 };
Rectangle get_bounding_box(Rectangle other) const
{
const auto min_x = BAN::Math::min(x, other.x);
const auto min_y = BAN::Math::min(y, other.y);
const auto max_x = BAN::Math::max(x + width, other.x + other.width);
const auto max_y = BAN::Math::max(y + height, other.y + other.height);
return Rectangle {
.x = min_x,
.y = min_y,
.width = max_x - min_x,
.height = max_y - min_y,
};
}
};
class Terminal
{
public:
void run();
uint32_t cols() const { return m_window->width() / m_font.width(); }
uint32_t rows() const { return m_window->height() / m_font.height(); }
private:
void handle_sgr();
Rectangle handle_csi(char ch);
Rectangle putchar(uint8_t ch);
bool read_shell();
void hide_cursor();
void show_cursor();
void on_key_event(LibGUI::EventPacket::KeyEvent);
void start_shell();
private:
struct Cursor
{
uint32_t x;
uint32_t y;
};
struct ShellInfo
{
int pts_master;
pid_t pid;
};
enum class State
{
Normal,
ESC,
CSI,
};
struct CSIInfo
{
int32_t fields[2];
size_t index;
bool question;
};
private:
BAN::UniqPtr<LibGUI::Window> m_window;
LibFont::Font m_font;
ShellInfo m_shell_info;
State m_state { State::Normal };
CSIInfo m_csi_info;
bool m_cursor_shown { true };
bool m_cursor_blink_shown { true };
uint64_t m_cursor_blink_ms { 0 };
Cursor m_cursor { 0, 0 };
BAN::Vector<uint32_t> m_cursor_buffer;
bool m_got_key_event { false };
uint8_t m_utf8_index { 0 };
uint8_t m_utf8_bytes[4] { };
Cursor m_saved_cursor { 0, 0 };
uint32_t m_fg_color { 0 };
uint32_t m_bg_color { 0 };
};