/* 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);
}