View of xos/usr/lib/readline/terminal.c

/* Caracteristiques du terminal */
/* Copyright (C) 2008  Emmanuel Varoquaux
 
   This file is part of XOS.
 
   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation, either version 3 of the License, or
   (at your option) any later version.
 
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
 
   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
#include "terminal.h"
 
#include <readline/rlvars.h>
#include <sys/ioctl.h>
 
static int tty;
 
/* Sequences de controle */
 
static char seq_buf[64];
 
char cursor_home_seq[] = "\e[H";
 
char *cursor_up_seq(int n)
{
  sprintf(seq_buf, "\e[%dA", n);
  return seq_buf;
}
 
char *cursor_down_seq(int n)
{
  sprintf(seq_buf, "\e[%dB", n);
  return seq_buf;
}
 
char *cursor_forward_seq(int n)
{
  sprintf(seq_buf, "\e[%dC", n);
  return seq_buf;
}
 
char *cursor_backward_seq(int n)
{
  sprintf(seq_buf, "\e[%dD", n);
  return seq_buf;
}
 
char erase_end_of_line_seq[] = "\e[K";
char erase_screen_seq[] = "\e[2J";
 
/* Taille de l'ecran */
 
#define DEFAULT_SCREENWIDTH  80
#define DEFAULT_SCREENHEIGHT 24
 
int screenwidth;
int screenheight;
 
static void get_screensize()
{
  int has_winsize;
  struct winsize winsize;
 
  has_winsize = ioctl(tty, TIOCGWINSZ, &winsize) == 0;
  screenwidth = has_winsize && winsize.ws_col >= 2 ? winsize.ws_col : DEFAULT_SCREENWIDTH;
  screenheight = has_winsize && winsize.ws_row >= 1 ? winsize.ws_row : DEFAULT_SCREENHEIGHT;
}
 
/* Initialisation */
 
void get_term_info()
{
  tty = fileno(rl_instream);
  get_screensize();
}
 
/* Cloche */
 
void ring_bell()
{
  fputc('\a', stderr);
  fflush(stderr);
}