/* TTY frame functions.
   Copyright (C) 1995  Free Software Foundation, Inc.
   Copyright (C) 1995, 1996 Ben Wing.
   Copyright (C) 1997  Free Software Foundation, Inc.

This file is part of XEmacs.

XEmacs 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, or (at your option) any
later version.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

/* Written by Ben Wing.
   Multi-frame support added by Hrvoje Niksic. */

#include <config.h>
#include "lisp.h"

#include "console-tty.h"
#include "frame.h"

#include "events.h"

#ifdef HAVE_GPM
#include <gpm.h>
#endif


/* Default properties to use when creating frames.  */
Lisp_Object Vdefault_tty_frame_plist;

static void tty_raise_frame (struct frame *);


static void
tty_init_frame_1 (struct frame *f, Lisp_Object props)
{
  struct device *d = XDEVICE (FRAME_DEVICE (f));
  struct console *c = XCONSOLE (DEVICE_CONSOLE (d));

  ++CONSOLE_TTY_DATA (c)->frame_count;
  f->order_count = CONSOLE_TTY_DATA (c)->frame_count;
  f->height = CONSOLE_TTY_DATA (c)->height;
  f->width = CONSOLE_TTY_DATA (c)->width;
}

static void
tty_init_frame_3 (struct frame *f)
{
  tty_raise_frame (f);
}

static void
tty_select_frame_if_unhidden (Lisp_Object frame)
{
  if (FRAME_REPAINT_P (XFRAME (frame)))
    select_frame_1 (frame);
}

static void
tty_schedule_frame_select (struct frame *f)
{
  Lisp_Object frame;

  XSETFRAME (frame, f);
  enqueue_magic_eval_event (tty_select_frame_if_unhidden, frame);
}

static void
tty_after_init_frame (struct frame *f, int first_on_device,
		      int first_on_console)
{
  if (first_on_console)
    call1 (Qinit_post_tty_win, FRAME_CONSOLE (f));
}

#ifdef HAVE_GPM
static int
tty_get_mouse_position (struct device *d, Lisp_Object *frame, int *x, int *y)
{
  Gpm_Event ev;
  int num_buttons;

  num_buttons = Gpm_GetSnapshot(&ev);
  *x = ev.x;
  *y = ev.y;
  *frame = DEVICE_SELECTED_FRAME (d);
  return (1);
}

static void
tty_set_mouse_position (struct window *w, int x, int y)
{
  /* XXX
     I couldn't find any GPM functions that set the mouse position.
     Mr. Perry had left this function empty; that must be why.
     karlheg
  */
}

#endif


/* Change from withdrawn state to mapped state. */
static void
tty_make_frame_visible (struct frame *f)
{
  if (!FRAME_VISIBLE_P(f))
    {
      f->visible = -1;
    }
}

/* Change from mapped state to withdrawn state. */
static void
tty_make_frame_invisible (struct frame *f)
{
  f->visible = 0;
}

static void
tty_make_frame_hidden (struct frame *f)
{
  f->visible = -1;
}

static void
tty_make_frame_unhidden (struct frame *f)
{
  if (!FRAME_REPAINT_P(f))
    {
      SET_FRAME_CLEAR(f);
      f->visible = 1;
    }
}

static int
tty_frame_visible_p (struct frame *f)
{
  return FRAME_VISIBLE_P (f);
}

static void
tty_raise_frame_no_select (struct frame *f)
{
  struct frame *o;
  Lisp_Object tail;

  LIST_LOOP (tail, DEVICE_FRAME_LIST (XDEVICE (FRAME_DEVICE (f))))
    {
      o = XFRAME (XCAR (tail));
      if (o != f && FRAME_REPAINT_P(o))
	{
	   tty_make_frame_hidden (o);
	   break;
	}
    }
  tty_make_frame_unhidden (f);
}

static void
tty_raise_frame (struct frame *f)
{
  tty_raise_frame_no_select (f);
  tty_schedule_frame_select (f);
}

static void
tty_lower_frame (struct frame *f)
{
  Lisp_Object frame_list = DEVICE_FRAME_LIST (XDEVICE (FRAME_DEVICE (f)));
  Lisp_Object tail, new;

  if (!FRAME_REPAINT_P (f))
    return;

  LIST_LOOP (tail, frame_list)
    {
      if (f == XFRAME (XCAR (tail)))
	break;
    }

  /* To lower this frame, another frame has to be raised.  Return if
     there is no other frame. */
  if (NILP (tail) && EQ(frame_list, tail))
    return;

  tty_make_frame_hidden (f);
  if (CONSP (XCDR (tail)))
    new = XCAR (XCDR (tail));
  else
    new = XCAR (frame_list);
  tty_make_frame_unhidden (XFRAME (new));
  tty_schedule_frame_select (XFRAME (new));
}

static void
tty_delete_frame (struct frame *f)
{
  struct device *d = XDEVICE (FRAME_DEVICE (f));

  if (!NILP (DEVICE_SELECTED_FRAME (d)))
    tty_raise_frame (XFRAME (DEVICE_SELECTED_FRAME (d)));
}

/************************************************************************/
/*                            initialization                            */
/************************************************************************/

void
console_type_create_frame_tty (void)
{
  CONSOLE_HAS_METHOD (tty, init_frame_1);
  CONSOLE_HAS_METHOD (tty, init_frame_3);
  CONSOLE_HAS_METHOD (tty, after_init_frame);
#ifdef HAVE_GPM
  CONSOLE_HAS_METHOD (tty, get_mouse_position);
  CONSOLE_HAS_METHOD (tty, set_mouse_position);
#endif
  CONSOLE_HAS_METHOD (tty, make_frame_visible);
  CONSOLE_HAS_METHOD (tty, make_frame_invisible);
  CONSOLE_HAS_METHOD (tty, frame_visible_p);
  CONSOLE_HAS_METHOD (tty, raise_frame);
  CONSOLE_HAS_METHOD (tty, lower_frame);
  CONSOLE_HAS_METHOD (tty, delete_frame);
}

void
vars_of_frame_tty (void)
{
  DEFVAR_LISP ("default-tty-frame-plist", &Vdefault_tty_frame_plist /*
Plist of default frame-creation properties for tty frames.
These are in addition to and override what is specified in
`default-frame-plist', but are overridden by the arguments to the
particular call to `make-frame'.
*/ );
  Vdefault_tty_frame_plist = Qnil;

  tty_console_methods->device_specific_frame_props =
    &Vdefault_tty_frame_plist;

  /* Tty frames are now supported.  Advertise a feature to indicate this. */
  Fprovide (intern ("tty-frames"));
}