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/*
 *  R : A Computer Langage for Statistical Data Analysis
 *  Copyright (C) 1998-2004   Lyndon Drake
 *                            and the R Development Core Team
 *
 *  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 2 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, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "system.h"
#include <Rinterface.h>
#include "terminal.h"
#include "gtkconsole.h"

#include <gnome.h>

    /*--- I/O Support Code ---*/

    /* These routines provide hooks for supporting console I/O.
     * Under raw Unix these routines simply provide a
     * connection to the stdio library.
     * Under the GNOME interface the routines hook into
     * the GtkConsole widget.
     */

extern int (*R_timeout_handler)();
extern long R_timeout_val;

/* Catch input in the console window */
void
R_gtk_terminal_line_event (GtkWidget * widget)
{
  gtk_main_quit ();
}

/* Fill a text buffer with user typed console input. */
int
Rgnome_ReadConsole (const char *prompt, unsigned char *buf, int len,
            int addtohistory)
{
  if (!R_Interactive)
    {
      if (!R_Slave)
    fputs (prompt, stdout);
      if (fgets ((char *) buf, len, stdin) == NULL)
    return 0;
      if (!R_Slave)
    fputs ((char *) buf, stdout);
    }
   else
    {
      gtk_console_enable_input (GTK_CONSOLE (R_gtk_terminal_text), 
                (char *) prompt, strlen (prompt));
      gtk_signal_connect (GTK_OBJECT (R_gtk_terminal_text),
              "console_line_ready",
              GTK_SIGNAL_FUNC (R_gtk_terminal_line_event), NULL);

      if (R_timeout_handler && R_timeout_val)
      gtk_timeout_add(R_timeout_val, R_timeout_handler, NULL);
      gtk_main ();

      gtk_console_read (GTK_CONSOLE (R_gtk_terminal_text), (char *) buf, len,
            addtohistory);
    }

  return 1;
}

/* Write a text buffer to the console. */
/* All system output is filtered through this routine. */
void
Rgnome_WriteConsole (const char *buf, int len)
{
    gtk_console_write (GTK_CONSOLE (R_gtk_terminal_text), (char *)buf, len);
}

/* Indicate that input is coming from the console */
void
Rgnome_ResetConsole ()
{
}

/* Stdio support to ensure the console file buffer is flushed */
void
Rgnome_FlushConsole ()
{
  gtk_console_flush (GTK_CONSOLE (R_gtk_terminal_text));
}


/* Reset stdin if the user types EOF on the console. */
void
Rgnome_ClearerrConsole ()
{
}