/* The GIMP -- an image manipulation program
 * Copyright (C) 1995 Spencer Kimball and Peter Mattis
 *
 * 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.
 */


/* Session-managment stuff

   I include a short description here on what is done and what problems 
   are left.

   Since everything saved in sessionrc changes often (with each session?) 
   the whole file is rewritten each time the gimp exits. I don't see any
   use in implementing a more flexible scheme like it is used for gimprc.

   Right now session-managment is limited to window geometry. I plan to add 
   at least the saving of Last-Used-Images (using nuke's patch).

   There is a problem with the offset introduced by the window-manager adding
   decorations to the windows. This is annoying and should be fixed somehow.
   ( Update: I was promised that this will be fixed in gtk. )
   
   Still not sure how to implement stuff for opening windows on start-up.
   Probably the best thing to do, would be to have a list of dialogs in
   the preferences-dialog that should always be opened.
 */

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

#include "appenv.h"
#include "gimprc.h"
#include "session.h"

static void sessionrc_write_geometry (SessionGeometry *, FILE *);

GList *session_geometry_updates = NULL;

/* global session variables */
SessionGeometry toolbox_geometry = { "toolbox", 0, 0, 0, 0 };
SessionGeometry lc_dialog_geometry = { "lc-dialog", 0, 400, 0, 0 };
SessionGeometry info_dialog_geometry = { "info-dialog", 165, 0, 0, 0 };
SessionGeometry tool_options_geometry = { "tool-options", 0, 345, 0, 0 };
SessionGeometry palette_geometry = { "palette", 140, 180, 0, 0 };
SessionGeometry brush_select_geometry = { "brush-select", 150, 180, 0, 0 };
SessionGeometry pattern_select_geometry = { "pattern-select", 160, 180, 0, 0 };
SessionGeometry gradient_editor_geometry = { "gradient-editor", 170, 180, 0, 0 };

/* public functions */
void 
session_get_window_geometry (GtkWidget       *window, 
			     SessionGeometry *geometry)
{
  if ( !save_window_positions_on_exit || geometry == NULL || window->window == NULL )
    return;

  gdk_window_get_origin (window->window, &geometry->x, &geometry->y);
  gdk_window_get_size (window->window, &geometry->width, &geometry->height);

  if (g_list_find (session_geometry_updates, geometry) == NULL)
    session_geometry_updates = g_list_append (session_geometry_updates, geometry);
}

void 
session_set_window_geometry (GtkWidget       *window, 
			     SessionGeometry *geometry,
			     int              set_size)
{
  if ( window == NULL || geometry == NULL)
    return;
  
  gtk_widget_set_uposition (window, geometry->x, geometry->y);
  
  if ( (set_size) && (geometry->width > 0) && (geometry->height > 0) )
    gtk_widget_set_usize (window, geometry->width, geometry->height);
}

void
save_sessionrc (void)
{
  char *gimp_dir;
  char filename[512];
  FILE *fp;

  gimp_dir = gimp_directory ();
  if ('\000' != gimp_dir[0])
    {
      sprintf (filename, "%s/sessionrc", gimp_dir);

      fp = fopen (filename, "w");
      if (!fp)
	return;

      fprintf(fp, "# GIMP sessionrc\n");
      fprintf(fp, "# This file takes session-specific info (that is info,\n");
      fprintf(fp, "# you want to keep between two gimp-sessions). You are\n");
      fprintf(fp, "# not supposed to edit it manually, but of course you\n");
      fprintf(fp, "# can do. This file will be entirely rewritten every time\n"); 
      fprintf(fp, "# you quit the gimp. If this file isn't found, defaults\n");
      fprintf(fp, "# are used.\n\n");

      /* save window geometries */
      g_list_foreach (session_geometry_updates, (GFunc)sessionrc_write_geometry, fp);

      /* save last tip shown */
      fprintf(fp, "(last-tip-shown %d)\n\n", last_tip + 1);

      fclose (fp);
    }
}

void
session_init (void)
{
  char *gimp_dir;
  char filename[512];

  gimp_dir = gimp_directory ();

  if (gimp_dir)
    {
      sprintf (filename, "%s/sessionrc", gimp_dir);
      parse_gimprc_file (filename);
    }
}


/* internal function */
static void
sessionrc_write_geometry (SessionGeometry *geometry, FILE *fp)
{
  if (fp == NULL || geometry == NULL) 
    return;
  
  fprintf (fp,"(session-geometry \"%s\"\n", geometry->name);
  fprintf (fp,"   (position %d %d)\n", geometry->x, geometry->y);
  fprintf (fp,"   (size %d %d))\n\n", geometry->width, geometry->height);
}