Method getsize

src/screen.cpp:157–229

get the screen size Screen::rows and Screen::cols, returns Screen::cols

// get the screen size Screen::rows and Screen::cols, returns Screen::cols
size_t Screen::getsize()
{
  // get current window size from ioctl
#if defined(OS_WIN)
  CONSOLE_SCREEN_BUFFER_INFO info;
  if (GetConsoleScreenBufferInfo(hConOut, &info))
  {
    rows = info.dwSize.Y;
    cols = info.dwSize.X;
  }
  else
#elif defined(TIOCGWIN)
  struct winsize winsize;
  if (ioctl(tty, TIOCGWIN, &winsize) == 0)
  {
    rows = winsize.ts_lines;
    cols = winsize.ts_cols;
  }
  else
#elif defined(TIOCGWINSZ)
  struct winsize winsize;
  if (ioctl(tty, TIOCGWINSZ, &winsize) == 0)
  {
    rows = winsize.ws_row;
    cols = winsize.ws_col;
  }
  else
#endif
  {
    // save cursor position, reset window scroll margins, move cursor to 999;999
    put("\0337\033[r\033[999;999H", 15);

    int row = -1;
    int col = -1;

    // get cursor position 0 <= row <= 999 and 0 <= col <= 999
    getpos(&row, &col);

    if (row > 0 && col > 0)
    {
      rows = row + 1;
      cols = col + 1;
    }
    else
    {
      rows = 24;
      cols = 80;

#ifndef OS_WIN
      const char *env;
      env = getenv("LINES");
      if (env != NULL)
      {
        rows = atoi(env);
        if (row <= 1)
          rows = 24;
      }
      env = getenv("COLUMNS");