resize.c

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#include "config.h"
#include <fcntl.h>
#include <stddef.h>
#include <unistd.h>
#include "mutt/lib.h"
#include "mutt_curses.h"
#include "mutt_window.h"
#include "rootwin.h"
#ifdef HAVE_TERMIOS_H
#include <termios.h>
#endif
#ifndef HAVE_TCGETWINSIZE
#ifdef HAVE_SYS_IOCTL_H
#include <sys/ioctl.h>
#else
#ifdef HAVE_IOCTL_H
#include <ioctl.h>
#endif
#endif
#endif /* HAVE_TCGETWINSIZE */

static struct winsize mutt_get_winsize(void)
{
  struct winsize w = { 0 };
 
  int fd = open("/dev/tty", O_RDONLY);
  if (fd != -1)
  {
#ifdef HAVE_TCGETWINSIZE
    tcgetwinsize(fd, &w);
#else
    ioctl(fd, TIOCGWINSZ, &w);
#endif
    close(fd);
  }
  return w;
}

void mutt_resize_screen(void)
{
  struct winsize w = mutt_get_winsize();
 
  int screenrows = w.ws_row;
  int screencols = w.ws_col;
 
  if (screenrows <= 0)
  {
    const char *cp = mutt_str_getenv("LINES");
    if (cp && !mutt_str_atoi_full(cp, &screenrows))
      screenrows = 24;
  }
 
  if (screencols <= 0)
  {
    const char *cp = mutt_str_getenv("COLUMNS");
    if (cp && !mutt_str_atoi_full(cp, &screencols))
      screencols = 80;
  }
 
  resizeterm(screenrows, screencols);
  rootwin_set_size(screencols, screenrows);
  window_notify_all(NULL);
}