gnome-control-center/capplets/background/main.c

/* -*- mode: c; style: linux -*- */

/* main.c
 * Copyright (C) 2000 Helix Code, Inc.
 *
 * Written by Bradford Hovinen (hovinen@helixcode.com)
 *
 * 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, 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.
 */

#ifdef HAVE_CONFIG_H
#  include <config.h>
#endif

#include <gtk/gtk.h>
#include <gnome.h>
#include <libgnomeui/gnome-window-icon.h>
#include <tree.h>
#include <parser.h>
#include <fcntl.h>

#include <glade/glade.h>

#include <capplet-widget.h>

#ifdef HAVE_XIMIAN_ARCHIVER
#  include <ximian-archiver/archive.h>
#  include <ximian-archiver/location.h>
#endif /* HAVE_XIMIAN_ARCHIVER */

#include "preferences.h"
#include "prefs-widget.h"

static Preferences *prefs;
static Preferences *old_prefs;
static PrefsWidget *prefs_widget;

static guint ok_handler_id;
static guint cancel_handler_id;

#ifdef HAVE_XIMIAN_ARCHIVER

static Archive *archive;
static gboolean outside_location;

static void
store_archive_data (void) 
{
	Location *location;
	xmlDocPtr xml_doc;

	if (capplet_get_location () == NULL)
		location = archive_get_current_location (archive);
	else
		location = archive_get_location (archive,
						 capplet_get_location ());

	xml_doc = preferences_write_xml (prefs);
	location_store_xml (location, "background-properties-capplet",
			    xml_doc, STORE_MASK_PREVIOUS);
	xmlFreeDoc (xml_doc);
	archive_close (archive);
}

#endif /* HAVE_XIMIAN_ARCHIVER */

static void
ok_cb (GtkWidget *widget) 
{
#ifdef HAVE_XIMIAN_ARCHIVER
	if (!outside_location) {
		preferences_save (prefs);
		preferences_apply_now (prefs);
	}
#else /* !HAVE_XIMIAN_ARCHIVER */
	preferences_save (prefs);
	preferences_apply_now (prefs);
#endif /* HAVE_XIMIAN_ARCHIVER */

	gtk_signal_disconnect (GTK_OBJECT (prefs_widget), ok_handler_id);
	gtk_signal_disconnect (GTK_OBJECT (prefs_widget), cancel_handler_id);
	gtk_object_destroy (GTK_OBJECT (prefs_widget));
#ifdef HAVE_XIMIAN_ARCHIVER
	store_archive_data ();
#endif /* HAVE_XIMIAN_ARCHIVER */
}

static void
cancel_cb (GtkWidget *widget) 
{
#ifdef HAVE_XIMIAN_ARCHIVER
	if (!outside_location) {
		preferences_save (old_prefs);
		preferences_apply_now (old_prefs);
	}
#else /* !HAVE_XIMIAN_ARCHIVER */
	preferences_save (prefs);
	preferences_apply_now (prefs);
#endif /* HAVE_XIMIAN_ARCHIVER */

	gtk_signal_disconnect (GTK_OBJECT (prefs_widget), ok_handler_id);
	gtk_signal_disconnect (GTK_OBJECT (prefs_widget), cancel_handler_id);
	gtk_object_destroy (GTK_OBJECT (prefs_widget));
}

static void 
setup_capplet_widget (void)
{
	preferences_freeze (prefs);

	prefs_widget = PREFS_WIDGET (prefs_widget_new (prefs));

	ok_handler_id =
		gtk_signal_connect (GTK_OBJECT (prefs_widget), "ok", 
				    GTK_SIGNAL_FUNC (ok_cb), NULL);
	cancel_handler_id =
		gtk_signal_connect (GTK_OBJECT (prefs_widget), "cancel", 
				    GTK_SIGNAL_FUNC (cancel_cb), NULL);		

	gtk_widget_show_all (GTK_WIDGET (prefs_widget));

	preferences_thaw (prefs);
}

#ifdef HAVE_XIMIAN_ARCHIVER

static void
do_get_xml (void) 
{
	Preferences *prefs;
	xmlDocPtr doc;

	prefs = PREFERENCES (preferences_new ());
	preferences_load (prefs);
	doc = preferences_write_xml (prefs);
	xmlDocDump (stdout, doc);
	gtk_object_destroy (GTK_OBJECT (prefs));
}

static void
do_set_xml (gboolean apply_settings) 
{
	xmlDocPtr doc;
	char buffer[16384];
	GString *doc_str;
	int t = 0;

	fflush (stdin);

	fcntl (fileno (stdin), F_SETFL, 0);

	doc_str = g_string_new ("");

	while ((t = read (fileno (stdin), buffer, sizeof (buffer) - 1)) != 0) {
		buffer[t] = '\0';
		g_string_append (doc_str, buffer);
	}

	if (doc_str->len > 0) {
		doc = xmlParseDoc (doc_str->str);
		g_string_free (doc_str, TRUE);

		if (doc != NULL) {
			prefs = preferences_read_xml (doc);

			if (prefs != NULL) {
				if (apply_settings) {
					preferences_save (prefs);
					preferences_apply_now (prefs);
				}

				return;
			}
			else if (prefs != NULL) {
				return;
			}

			xmlFreeDoc (doc);
		}
	} else {
		g_critical ("No data to apply");
	}

	return;
}

#endif /* HAVE_XIMIAN_ARCHIVER */

static void
do_restore_from_defaults (void) 
{
	prefs = PREFERENCES (preferences_new ());
	preferences_save (prefs);
	preferences_apply_now (prefs);
}

int
main (int argc, char **argv)
{
	GnomeClient *client;
	GnomeClientFlags flags;
	gint token, res;
	gchar *restart_args[3];

	bindtextdomain (GETTEXT_PACKAGE, GNOMELOCALEDIR);
	bind_textdomain_codeset (GETTEXT_PACKAGE, "UTF-8");
	textdomain (GETTEXT_PACKAGE);

	glade_gnome_init ();
	res = gnome_capplet_init ("background-properties-capplet",
				  VERSION, argc, argv, NULL,
				  0, NULL);

	if (res < 0) {
		g_error ("Could not initialize the capplet.");
	}
	else if (res == 3) {
#ifdef HAVE_XIMIAN_ARCHIVER
		do_get_xml ();
#endif /* HAVE_XIMIAN_ARCHIVER */
		return 0;
	}
	else if (res == 4) {
#ifdef HAVE_XIMIAN_ARCHIVER
		do_set_xml (TRUE);
#endif /* HAVE_XIMIAN_ARCHIVER */
		return 0;
	}
	else if (res == 5) {
		do_restore_from_defaults ();
		return 0;
	}

	client = gnome_master_client ();
	flags = gnome_client_get_flags (client);

	if (flags & GNOME_CLIENT_IS_CONNECTED) {
		token = gnome_startup_acquire_token
			("GNOME_BACKGROUND_PROPERTIES",
			 gnome_client_get_id (client));

		if (token) {
			gnome_client_set_priority (client, 20);
			gnome_client_set_restart_style (client,
							GNOME_RESTART_ANYWAY);
			restart_args[0] = argv[0];
			restart_args[1] = "--init-session-settings";
			restart_args[2] = NULL;
			gnome_client_set_restart_command (client, 2,
							  restart_args);
		} else {
			gnome_client_set_restart_style (client,
							GNOME_RESTART_NEVER);
		}
	} else {
		token = 1;
	}

	gnome_window_icon_set_default_from_file
		(GNOMECC_ICONS_DIR"/gnome-ccbackground.png");

#ifdef HAVE_XIMIAN_ARCHIVER
	archive = ARCHIVE (archive_load (FALSE));

	if (capplet_get_location () != NULL &&
	    strcmp (capplet_get_location (),
		    archive_get_current_location_id (archive)))
	{
		outside_location = TRUE;
		do_set_xml (FALSE);
		if (prefs == NULL) return -1;
		preferences_freeze (prefs);
	} else {
		outside_location = FALSE;
		prefs = PREFERENCES (preferences_new ());
		preferences_load (prefs);
	}

	if (!outside_location && (token || res == 1)) {
		preferences_apply_now (prefs);
	}

#else /* !HAVE_XIMIAN_ARCHIVER */

	prefs = PREFERENCES (preferences_new ());
	preferences_load (prefs);

	if (token || res == 1)
		preferences_apply_now (prefs);

#endif /* HAVE_XIMIAN_ARCHIVER */

	if (!res) {
		old_prefs = PREFERENCES (preferences_clone (prefs));
		setup_capplet_widget ();

		capplet_gtk_main ();
	}

	return 0;
}