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path: root/src/fs/gnunet-fs-gtk.c
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/*
     This file is part of GNUnet.
     (C) 2010-2013 Christian Grothoff (and other contributing authors)

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

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

/**
 * @file src/fs/gnunet-fs-gtk.c
 * @brief Main function of gnunet-fs-gtk
 * @author Christian Grothoff
 */
#include "gnunet-fs-gtk.h"
#include "gnunet-fs-gtk_common.h"
#include "gnunet-fs-gtk_event-handler.h"
#include "gnunet-fs-gtk_open-uri.h"

#if HAVE_LIBUNIQUE
#include <unique/unique.h>
#endif

#include <gnunet/gnunet_arm_service.h>

/**
 * How many block requests can we have outstanding in parallel at a time by default?
 */
#define DEFAULT_MAX_PARALLEL_REQUESTS 100000

/**
 * How many downloads can we have outstanding in parallel at a time by default?
 */
#define DEFAULT_MAX_PARALLEL_DOWNLOADS 128

#define SERVICE_LIST_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 1)

/**
 * Should gnunet-fs-gtk start in tray mode?
 */
static int tray_only;

/**
 * Handle to our main loop.
 */
static struct GNUNET_GTK_MainLoop *ml;

/**
 * Handle for file-sharing operations.
 */
static struct GNUNET_FS_Handle *fs;

/**
 * Handle for ARM monitoring.
 */
static struct GNUNET_ARM_MonitorHandle *armon;

/**
 * Handle for ARM controlling.
 */
static struct GNUNET_ARM_Handle *arm;

/**
 * Context for main window.
 */
static struct GNUNET_GTK_MainWindowContext main_context;


#if HAVE_LIBUNIQUE
static UniqueApp *unique_app;
#endif


struct GNUNET_GTK_MainWindowContext *
GNUNET_FS_GTK_get_main_context ()
{
  return &main_context;
}


/**
 * Return handle for file-sharing operations.
 *
 * @return NULL on error
 */
struct GNUNET_FS_Handle *
GNUNET_FS_GTK_get_fs_handle ()
{
  return fs;
}


/**
 * Remember FS handle if we don't have one yet.
 *
 * @param fsh file sharing handle to use
 */
void
GNUNET_FS_GTK_set_fs_handle (struct GNUNET_FS_Handle *fsh)
{
  if (NULL == fs)
    fs = fsh;
}


/**
 * Get our configuration.
 *
 * @return configuration handle
 */
const struct GNUNET_CONFIGURATION_Handle *
GNUNET_FS_GTK_get_configuration ()
{
  return GNUNET_GTK_main_loop_get_configuration (ml);
}


/**
 * Get an object from the main window.
 *
 * @param name name of the object
 * @return NULL on error
 */
GObject *
GNUNET_FS_GTK_get_main_window_object (const char *name)
{
  return GNUNET_GTK_main_loop_get_object (ml, name);
}


/**
 * Return the list store with anonymity levels.
 *
 * @return the list store
 */
GtkTreeModel *
GNUNET_FS_GTK_get_anonymity_level_list_store ()
{
  return GTK_TREE_MODEL (GNUNET_FS_GTK_get_main_window_object ("anonymity_level_liststore"));
}


/**
 * Obtains main window position and size before it's destroyed
 * and saves these into user's config file.
 *
 * @param main_window main window widget
 */
static void
main_window_save_position (GtkWidget *main_window)
{
  GdkWindow *main_window_gdk;
  gint window_x;
  gint window_y;
  gint window_width;
  gint window_height;
  int maximized;
  GdkWindowState window_state;
  struct GNUNET_CONFIGURATION_Handle *cfg;
  struct GNUNET_CONFIGURATION_Handle *cfgDefault;

  cfg = (struct GNUNET_CONFIGURATION_Handle *) GNUNET_GTK_main_loop_get_configuration (ml);
  main_window_gdk = gtk_widget_get_window (main_window);
  maximized = GNUNET_YES;
  if (NULL != main_window_gdk)
  {
    window_state = gdk_window_get_state (main_window_gdk);
    if (!(window_state & GDK_WINDOW_STATE_MAXIMIZED))
      maximized = GNUNET_NO;
  }

  gtk_window_get_position (GTK_WINDOW (main_window), &window_x, &window_y);
  gtk_window_get_size (GTK_WINDOW (main_window), &window_width, &window_height);

  GNUNET_CONFIGURATION_set_value_number (cfg, "gnunet-fs-gtk",
					 "MAIN_WINDOW_X", window_x);
  GNUNET_CONFIGURATION_set_value_number (cfg, "gnunet-fs-gtk",
					 "MAIN_WINDOW_Y", window_y);
  GNUNET_CONFIGURATION_set_value_number (cfg, "gnunet-fs-gtk",
					 "MAIN_WINDOW_WIDTH", window_width);
  GNUNET_CONFIGURATION_set_value_number (cfg, "gnunet-fs-gtk",
					 "MAIN_WINDOW_HEIGHT", window_height);
  GNUNET_CONFIGURATION_set_value_string (cfg, "gnunet-fs-gtk",
					 "MAIN_WINDOW_MAXIMIZED",
					 (maximized == GNUNET_YES) ? "YES" : "NO");

  cfgDefault = GNUNET_CONFIGURATION_create ();
  (void) GNUNET_CONFIGURATION_load (cfgDefault, NULL); /* load defaults only */
  GNUNET_CONFIGURATION_write_diffs (cfgDefault, cfg,
				    GNUNET_GTK_main_loop_get_configuration_file (ml));
  GNUNET_CONFIGURATION_destroy (cfgDefault);
}


/**
 * Obtains main window position and size before it's destroyed
 * and saves these into user's config file.
 *
 * @param main_window main window widget
 * @param event the event that we are handling
 * @param user_data main window context
 */
gboolean
GNUNET_GTK_main_window_configure_event_cb (GtkWidget *main_window,
				           GdkEventConfigure *event,
				           gpointer user_data)
{
  struct GNUNET_GTK_MainWindowContext *main_context = user_data;

  main_window_save_position (main_context->main_window);
  return FALSE;
}


/**
 * Task run on shutdown.
 *
 * @param cls NULL
 * @param tc scheduler context, unused
 */
static void
shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  struct SearchLookup *sl;
  struct PseuLookupContext *lctx;

  GNUNET_GTK_tray_icon_destroy ();
  if (fs != NULL)
  {
    GNUNET_FS_stop (fs);
    fs = NULL;
  }
  if (NULL != armon)
  {
    GNUNET_ARM_monitor_disconnect_and_free (armon);
    armon = NULL;
  }
  if (NULL != arm)
  {
    GNUNET_ARM_disconnect_and_free (arm);
    arm = NULL;
  }
  GNUNET_FS_GTK_close_uri_tab_ ();
  if (NULL != ml)
  {
    GNUNET_GTK_main_loop_quit (ml);
    ml = NULL;
  }
  if (NULL != main_context.id_op)
  {
    GNUNET_IDENTITY_cancel (main_context.id_op);
    main_context.id_op = NULL;
  }
  if (NULL != main_context.identity)
  {
    GNUNET_IDENTITY_disconnect (main_context.identity);
    main_context.identity = NULL;
  }
  while (NULL != (sl = main_context.sl_head))
    abort_search_lookup (sl);
  while (NULL != (lctx = main_context.lctx_head))
    abort_pseu_lookup (lctx);
  if (NULL != main_context.zm)
  {
    GNUNET_NAMESTORE_zone_monitor_stop (main_context.zm);
    main_context.zm = NULL;
  }
  if (NULL != main_context.gns)
  {
    GNUNET_GNS_disconnect (main_context.gns);
    main_context.gns = NULL;
  }
  if (NULL != main_context.sks_zone)
  {
    GNUNET_free (main_context.sks_zone);
    main_context.sks_zone = NULL;
  }
}


/**
 * Callback invoked if the application is supposed to exit.
 *
 * @param object origin of the quit event, unused
 * @param user_data global builder instance, unused
 */
void
GNUNET_FS_GTK_menu_quit_activate_cb (GtkMenuItem *object,
				     gpointer user_data)
{
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Callback invoked if the application is supposed to exit.
 *
 * @param object origin of the quit event, unused
 * @param event the delete event
 * @param user_data global builder instance, unused
 */
void
GNUNET_FS_GTK_delete_event_cb (GtkWidget *object,
			       GdkEvent *event,
			       gpointer user_data)
{
  /* GNUNET_FS_GTK_delete_event_cb will eventually be called if we shut down
   * the scheduler, because shutting it down will make GTK delete the main
   * window. On the other hand, deleting the main window first (clicking on X
   * button) will not trigger scheduler shutdown, unlike
   * GNUNET_FS_GTK_menu_quit_activate_cb(). So we shut it down here again,
   * just to be sure it is dead (if it isn't, application will hang up).
   */
  GNUNET_SCHEDULER_shutdown ();

  GNUNET_GTK_tray_icon_destroy ();
  GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE,
                                      &shutdown_task, NULL);
}


/**
 * Text was pasted into the main window.  Check if it is a URL
 * and perform the appropriate action.
 *
 * @param cb source clipboard
 * @param text pasted text
 * @param data NULL
 */
static void
process_paste (GtkClipboard *cb,
	       const gchar *text,
	       gpointer data)
{
  struct GNUNET_FS_Uri *kskuri;
  char *emsg;

  if (strlen (text) == 0)
    return;
  if (GNUNET_OK == GNUNET_FS_GTK_handle_uri_string (text, 1))
    return;
  emsg = NULL;
  kskuri = GNUNET_FS_uri_ksk_create (text, &emsg);
  if (NULL == kskuri)
  {
    GNUNET_free_non_null (emsg);
    return;
  }
  GNUNET_FS_GTK_handle_uri (kskuri, 1);
  GNUNET_FS_uri_destroy (kskuri);
}


/**
 * We got an event in the main window.  Check for clipboard action.
 *
 * @param widget the main window
 * @param event the event, we only care about button events
 * @param user_data the 'struct SearchTab' the widget is in
 * @return FALSE if no menu could be popped up,
 *         TRUE if there is now a pop-up menu
 */
gboolean
GNUNET_FS_GTK_main_window_button_press_event (GtkWidget * widget,
					      GdkEvent * event,
					      gpointer user_data)
{
  GdkEventButton *event_button = (GdkEventButton *) event;
  GtkClipboard *cb;

  if ( (GDK_BUTTON_PRESS != event->type) ||
       (2 != event_button->button) )
    return FALSE;
  cb = gtk_clipboard_get (gdk_atom_intern ("PRIMARY", FALSE));
  gtk_clipboard_request_text (cb, &process_paste, NULL);
  return FALSE;
}


#if HAVE_LIBUNIQUE
/**
 * Function called whenever a second gnunet-fs-gtk process is started
 * with additional arguments for us.
 *
 * @param app unique handle
 * @param command command that was given
 * @param message_data command line message data
 * @param time_ timestamp of the event
 * @param user_data our 'main context'
 * @return response code for original process
 */
static UniqueResponse
unique_app_message_cb (UniqueApp *app,
		       gint command,
		       UniqueMessageData *message_data,
		       guint time_,
		       gpointer user_data)
{
  struct GNUNET_GTK_MainWindowContext *main_context = user_data;

  /* raise the window */
  gtk_window_present_with_time (GTK_WINDOW (main_context->main_window), time_);

  switch (command)
    {
    case UNIQUE_NEW:
      /* this is unexpected... */
      GNUNET_break (0);
      break;
    case UNIQUE_OPEN:
      {
        gchar **uris;
        gint n_uris;
	gint i;

        uris = unique_message_data_get_uris (message_data);
        n_uris = g_strv_length (uris);
        for (i = 0; i < n_uris; i++)
	{
	  if (GNUNET_OK !=
	      GNUNET_FS_GTK_handle_uri_string (uris[i],
					       1 /* anonymity level */))
	    return UNIQUE_RESPONSE_PASSTHROUGH;
	}
        g_strfreev (uris);
      }
      break;
    case UNIQUE_ACTIVATE:
      break;
    default:
      break;
    }
  return UNIQUE_RESPONSE_OK;
}
#endif


static char *
format_service_list (unsigned int count, const char *const*list)
{
  size_t len = 0;
  int i;
  const char *header = _("GNUnet node appears to be on.");
  const char *listheader = _("Currently running services:\n");
  char *result;
  char *p;
  int r;

  len = strlen (header) + 1;
  if (list)
  {
    len += strlen (listheader);
    for (i = 0; i < count; i++)
      len += strlen (list[i]) + 1;
  }
  len += 1;
  result = p = GNUNET_malloc (len * sizeof (char));
  r = GNUNET_snprintf (p, (size_t) (result + len - p), "%s\n", header);
  if (r < 0)
  {
    GNUNET_free (result);
    return NULL;
  }
  p += r;
  if (list)
  {
    r = GNUNET_snprintf (p, (size_t) (result + len - p), "%s", listheader);
    if (r < 0)
    {
      GNUNET_free (result);
      return NULL;
    }
    p += r;
    for (i = 0; i < count; i++)
    {
      size_t l = strlen (list[i]);
      memcpy (p, list[i], l);
      p += l;
      if (i + 1 < count)
      {
        p[0] = '\n';
        p += 1;
      }
    }
  }
  p[0] = '\0';
  return result;
}


static void
service_list_callback (void *cls,
		       enum GNUNET_ARM_RequestStatus rs,
		       unsigned int count,
		       const char *const*list)
{
  char *service_list;

  if ((GNUNET_ARM_REQUEST_SENT_OK != rs) || (NULL == list))
    return;
  service_list = format_service_list (count, list);
  GNUNET_FS_GTK_update_connection_indicator (cls, TRUE, service_list);
  GNUNET_free_non_null (service_list);
}


static void
arm_connection_state_change (void *cls,
			     int connected)
{
  char *service_list;

  if (connected)
  {
    service_list = format_service_list (0, NULL);
    GNUNET_FS_GTK_update_connection_indicator (cls, TRUE, service_list);
    GNUNET_free_non_null (service_list);
    GNUNET_ARM_request_service_list (arm, SERVICE_LIST_TIMEOUT,
				     &service_list_callback, cls);
  }
  else
    GNUNET_FS_GTK_update_connection_indicator (cls, FALSE,
        _("Can't connect to the Automatic Restart Manager service."));
}


static void
service_status_change (void *cls,
		       const char *service,
		       enum GNUNET_ARM_ServiceStatus status)
{
  /* Very crude, we can probably do better.
   * Maybe keep a list of running services, and modify it in response
   * to service status changes, then update the indicator,
   * without requesting a list from ARM every goddamned time?
   */
  GNUNET_ARM_request_service_list (arm,
				   SERVICE_LIST_TIMEOUT,
				   &service_list_callback, cls);
}


/**
 * Process a record that was stored in the namestore in the
 * "sks_zone".  Adds (or removes) the respective label to the
 * drop-down menu for the SKS search by manipulating the
 * "namespace_label_liststore".
 *
 * @param cls closure
 * @param zone private key of the zone; NULL on disconnect
 * @param label label of the records; NULL on disconnect
 * @param rd_count number of entries in @a rd array; 0 on removal
 * @param rd array of records for the label
 */
static void
monitor_zone_records (void *cls,
		      const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone,
		      const char *label,
		      unsigned int rd_count,
		      const struct GNUNET_GNSRECORD_Data *rd)
{
  GtkListStore *ls;
  GtkTreeModel *tm;
  GtkTreeIter iter;
  gchar *id;
  gchar *label_gnu;

  ls = GTK_LIST_STORE (GNUNET_FS_GTK_get_main_window_object ("namespace_label_liststore"));
  if (NULL == zone)
  {
    gtk_list_store_clear (ls);
    return;
  }
  label_gnu = g_strdup_printf ("%s.%s",
			       label,
			       "gnu");
  if (0 == rd_count)
  {
    tm = GTK_TREE_MODEL (ls);
    if (gtk_tree_model_get_iter_first (tm, &iter))
      do
	{
	  gtk_tree_model_get (tm, &iter,
			      0, &id,
			      -1);
	  if (0 == strcmp (id, label_gnu))
	    {
	      GNUNET_assert (gtk_list_store_remove (ls, &iter));
	      g_free (id);
	      g_free (label_gnu);
	      return;
	    }
	  g_free (id);
	}
      while (gtk_tree_model_iter_next (tm, &iter));
    GNUNET_break (0);
    return;
  }
  gtk_list_store_insert_with_values (ls,
				     &iter,
				     -1,
				     0, label_gnu,
				     -1);
  g_free (label_gnu);
}


/**
 * The identity service has given us the ego we should use for resolving
 * namepace names.
 *
 * @param cls closure
 * @param ego ego handle, NULL for none
 * @param ctx context for application to store data for this ego
 *                 (during the lifetime of this process, initially NULL)
 * @param name name assigned by the user for this ego,
 *                   NULL if the user just deleted the ego and it
 *                   must thus no longer be used
 */
static void
handle_sks_zone_identity (void *cls,
			  struct GNUNET_IDENTITY_Ego *ego,
			  void **ctx,
			  const char *name)
{
  main_context.id_op = NULL;

  if (NULL == ego)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
		_("No default ego specified for `fs-sks` service, will not enable namespace search.\n"));
    return;
  }
  main_context.sks_zone = GNUNET_new (struct GNUNET_CRYPTO_EcdsaPrivateKey);
  *main_context.sks_zone = *GNUNET_IDENTITY_ego_get_private_key (ego);
  gtk_widget_show (GTK_WIDGET (GNUNET_FS_GTK_get_main_window_object ("main_window_search_namespace_label")));
  gtk_widget_show (GTK_WIDGET (GNUNET_FS_GTK_get_main_window_object ("main_window_search_namespace_combobox")));
  main_context.zm = GNUNET_NAMESTORE_zone_monitor_start (main_context.cfg,
							 main_context.sks_zone,
                                                         GNUNET_YES,
							 &monitor_zone_records,
							 NULL,
							 NULL);
}


/**
 * Actual main function run right after GNUnet's scheduler
 * is initialized.  Initializes up GTK and Glade.
 *
 * @param cls handle to the main loop (`struct GNUNET_GTK_MainLoop`)
 * @param tc scheduler context, unused
 */
static void
run (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
  unsigned long long dl_parallel;
  unsigned long long req_parallel;
  unsigned long long window_x;
  unsigned long long window_y;
  unsigned long long window_width;
  unsigned long long window_height;
  int maximized;

  ml = cls;
  /* setup main context */
  if (GNUNET_OK != GNUNET_GTK_main_loop_build_window (ml, &main_context))
    return;
  main_context.builder = GNUNET_GTK_main_loop_get_builder (ml);
  main_context.cfg = GNUNET_GTK_main_loop_get_configuration (ml);
  main_context.search_ns_treestore = GTK_TREE_STORE (GNUNET_FS_GTK_get_main_window_object ("main_window_search_namespace_treestore"));
  main_context.main_window = GTK_WIDGET (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_main_window"));
  main_context.main_window = GNUNET_GTK_plug_me ("GNUNET_FS_GTK_PLUG",
                                                 main_context.main_window);
  main_context.ns_selector_treeview = GTK_TREE_VIEW (GNUNET_FS_GTK_get_main_window_object ("namespace_selector_treeview"));
  main_context.ns_selector_window = GTK_WIDGET (GNUNET_FS_GTK_get_main_window_object ("namespace_selector_window"));
  main_context.ns_dropdown_button = GTK_TOGGLE_BUTTON (GNUNET_FS_GTK_get_main_window_object ("main_window_search_namespace_dropdown_button"));
  main_context.search_ns_label = GTK_LABEL (GNUNET_FS_GTK_get_main_window_object ("main_window_search_selected_namespace_label"));

  main_context.search_entry = GTK_ENTRY (GNUNET_FS_GTK_get_main_window_object ("main_window_search_entry"));

  main_context.anonymity_combo = GTK_COMBO_BOX (GNUNET_FS_GTK_get_main_window_object ("main_window_search_anonymity_combobox"));
  main_context.anonymity_level_liststore = GTK_LIST_STORE (GNUNET_FS_GTK_get_main_window_object ("anonymity_level_liststore"));

  main_context.preview_image = GTK_IMAGE (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_main_window_preview_image"));
  main_context.md_liststore = GTK_LIST_STORE (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_meta_data_list_store"));
  main_context.md_treeview = GTK_TREE_VIEW (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_main_window_metadata_treeview"));
  main_context.ns_discovery_handle = NULL;

  main_context.download_location_chooser = GTK_FILE_CHOOSER (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_search_frame_download_location_chooser"));
  main_context.download_name_entry = GTK_ENTRY (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_search_frame_download_filename_entry"));
  main_context.download_anonymity_combo = GTK_COMBO_BOX (GNUNET_FS_GTK_get_main_window_object ("main_window_download_anonymity_combobox"));
  main_context.download_recursive_checkbutton = GTK_CHECK_BUTTON (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_search_frame_download_recursive_checkbox"));
  main_context.download_download_button = GTK_BUTTON (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_search_frame_download_download_button"));
  main_context.download_panel = GTK_VBOX (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_search_frame_download_vbox"));

  main_context.notebook = GTK_NOTEBOOK (GNUNET_FS_GTK_get_main_window_object ("GNUNET_GTK_main_window_notebook"));

  main_context.connection_indicator = GTK_IMAGE (GNUNET_FS_GTK_get_main_window_object ("GNUNET_FS_GTK_main_window_connection_indicator"));

  GNUNET_GTK_set_icon_search_path ();
  GNUNET_GTK_setup_nls ();

  /* Make sure button class is realized */
  g_type_class_unref (g_type_class_ref (GTK_TYPE_BUTTON));
  /* GNUnet main window assumes that images on buttons are visible,
   * override the theme's gtkrc setting
   */
  g_object_set (gtk_settings_get_default (), "gtk-button-images", TRUE, NULL);

  /* setup main window */
  maximized = GNUNET_CONFIGURATION_get_value_yesno (main_context.cfg,
						    "gnunet-fs-gtk",
                                                    "MAIN_WINDOW_MAXIMIZED");
  if (GNUNET_SYSERR == maximized)
    maximized = GNUNET_YES;
  if ( (GNUNET_NO == maximized) &&
       (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
							    "MAIN_WINDOW_X", &window_x)) &&
       (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
							    "MAIN_WINDOW_Y", &window_y)) &&
       (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
							    "MAIN_WINDOW_WIDTH", &window_width)) &&
       (GNUNET_OK == GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
							    "MAIN_WINDOW_HEIGHT", &window_height)) )
  {
    gtk_window_move (GTK_WINDOW (main_context.main_window), window_x, window_y);
    gtk_window_resize (GTK_WINDOW (main_context.main_window), window_width, window_height);
  }
  else
  {
    /* If anything is wrong - play safe and show it maximized */
    gtk_window_maximize (GTK_WINDOW (main_context.main_window));
  }

  /* Allow multiple selection in metadata view; */
  /* FIXME-GTK3: this can be done within (modern versions of) glade */
  gtk_tree_selection_set_mode (gtk_tree_view_get_selection (main_context.md_treeview),
                               GTK_SELECTION_MULTIPLE);
  if (NULL == getenv ("GNUNET_FS_GTK_PLUG"))
    GNUNET_GTK_tray_icon_create (ml,
                                 GTK_WINDOW (main_context.main_window),
                                 "gnunet-fs-gtk",
                                 "gnunet-fs-gtk");

  /* FIXME: should these '1's be here? Maybe better to put them into
   * default config files?
   */
  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
      "MAX_PARALLEL_DOWNLOADS", &dl_parallel))
    dl_parallel = DEFAULT_MAX_PARALLEL_DOWNLOADS;
  if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_number (main_context.cfg, "gnunet-fs-gtk",
      "MAX_PARALLEL_REQUESTS", &req_parallel))
    req_parallel = DEFAULT_MAX_PARALLEL_REQUESTS;

  /* initialize file-sharing */
  fs = GNUNET_FS_start (main_context.cfg, "gnunet-fs-gtk",
			&GNUNET_GTK_fs_event_handler, NULL,
			GNUNET_FS_FLAGS_PERSISTENCE | GNUNET_FS_FLAGS_DO_PROBES,
                        GNUNET_FS_OPTIONS_DOWNLOAD_PARALLELISM,
                        (unsigned int) dl_parallel,
                        GNUNET_FS_OPTIONS_REQUEST_PARALLELISM,
                        (unsigned int) req_parallel,
                        GNUNET_FS_OPTIONS_END);
  if (NULL == fs)
  {
    GNUNET_GTK_main_loop_quit (cls);
    return;
  }
  arm = GNUNET_ARM_connect (main_context.cfg, &arm_connection_state_change, &main_context);
  armon = GNUNET_ARM_monitor (main_context.cfg, service_status_change, &main_context);
  main_context.gns = GNUNET_GNS_connect (main_context.cfg);
  main_context.identity = GNUNET_IDENTITY_connect (main_context.cfg, NULL, NULL);
  main_context.id_op = GNUNET_IDENTITY_get (main_context.identity,
					    "fs-sks",
					    &handle_sks_zone_identity,
					    NULL);
#if HAVE_LIBUNIQUE
  unique_app_watch_window (unique_app, GTK_WINDOW (main_context.main_window));
  g_signal_connect (unique_app, "message-received",
		    G_CALLBACK (unique_app_message_cb), &main_context);
#endif
  /* make GUI visible */
  if (!tray_only)
  {
    gtk_widget_show (main_context.main_window);
    gtk_window_present (GTK_WINDOW (main_context.main_window));
  }

  {
    char *const *argv;
    int argc;
    int i;

    GNUNET_GTK_main_loop_get_args (ml, &argc, &argv);

    for (i = 0; i < argc; i++)
      {
	if (GNUNET_OK !=
	    GNUNET_FS_GTK_handle_uri_string (argv[i],
					     1 /* anonymity level */))
	  fprintf (stderr,
		   "Invalid URI `%s'\n",
		   argv[i]);
      }
  }


  GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
				&shutdown_task, NULL);
}


int
main (int argc, char **argv)
{
  static struct GNUNET_GETOPT_CommandLineOption options[] = {
    {'t', "tray", NULL,
     gettext_noop ("start in tray mode"), 0,
     &GNUNET_GETOPT_set_one, &tray_only},
    GNUNET_GETOPT_OPTION_END
  };
#if HAVE_LIBUNIQUE
  int arge;

  gtk_init (&argc, &argv);
  unique_app = unique_app_new ("org.gnunet.gnunet-fs-gtk", NULL);
  if (unique_app_is_running (unique_app))
  {
    UniqueResponse response;

    arge = GNUNET_GETOPT_run ("gnunet-fs-gtk",
			      options,
			      argc, argv);
    response = unique_app_send_message (unique_app, UNIQUE_ACTIVATE, NULL);
    while (arge < argc)
    {
      UniqueMessageData *msg;

      msg = unique_message_data_new ();
      unique_message_data_set_text (msg, argv[arge], strlen (argv[arge])+1);
      if (UNIQUE_RESPONSE_OK == response)
	response = unique_app_send_message (unique_app,
					    UNIQUE_OPEN,
					    msg);
      unique_message_data_free (msg);
      arge++;
    }
    g_object_unref (unique_app);

    return (UNIQUE_RESPONSE_OK == response) ? 0 : 1;
  }

#endif
  if (GNUNET_OK !=
      GNUNET_GTK_main_loop_start ("gnunet-fs-gtk",
				  "GTK GUI for GNUnet",
				  argc, argv,
				  options,
                                  "gnunet_fs_gtk_main_window.glade",
				  &run))
  {
#if HAVE_LIBUNIQUE
    g_object_unref (unique_app);
#endif
    return 1;
  }
#if HAVE_LIBUNIQUE
  g_object_unref (unique_app);
#endif
  return 0;
}


/* end of gnunet-fs-gtk.c */