asciimation
/
src
/
term.hh
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123#ifndef OB_TERM_HH
#define OB_TERM_HH
#include "ansi_escape_codes.hh"
namespace AEC = OB::ANSI_Escape_Codes;
#include <unistd.h>
#include <sys/ioctl.h>
#include <termios.h>
#include <stdexcept>
#include <iostream>
#include <cstdio>
#include <thread>
#include <chrono>
namespace OB
{
class Term
{
public:
Term()
{
cursor_hide();
set_raw();
}
~Term()
{
cursor_show();
set_cooked();
}
void set_cooked()
{
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &old_) == -1)
{
throw std::runtime_error("tcsetattr failed");
}
}
void set_raw()
{
if (tcgetattr(STDIN_FILENO, &old_) == -1)
{
throw std::runtime_error("tcgetattr failed");
}
raw_ = old_;
raw_.c_lflag &= ~(ECHO | ICANON);
raw_.c_cc[VMIN] = 0;
raw_.c_cc[VTIME] = 0;
if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_) == -1)
{
throw std::runtime_error("tcsetattr failed");
}
}
static void cursor_hide()
{
std::cout << AEC::cursor_hide << std::flush;
}
static void cursor_show()
{
std::cout << AEC::cursor_show << std::flush;
}
static size_t height()
{
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
return w.ws_row;
}
static size_t width()
{
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
return w.ws_col;
}
static void size(size_t &width, size_t &height)
{
struct winsize w;
ioctl(STDOUT_FILENO, TIOCGWINSZ, &w);
width = w.ws_col;
height = w.ws_row;
}
static int cursor_get(size_t& width, size_t& height)
{
std::cout << "\033[6n" << std::flush;
char buf[32];
uint8_t i = 0;
for (;i < sizeof(buf) -1; ++i)
{
while (read(STDIN_FILENO, &buf[i], 1) != 1)
{
std::this_thread::sleep_for(std::chrono::milliseconds(50));
}
if (buf[i] == 'R') break;
}
buf[i] = '\0';
if (buf[0] != '\x1b' || buf[1] != '[') return -1;
int x;
int y;
if (sscanf(&buf[2], "%d;%d", &y, &x) != 2) return -1;
width = x;
height = y;
return 0;
}
private:
termios old_;
termios raw_;
}; // class Term
} // namespace OB
#endif // OB_TERM_HH