Adding upstream version 3.38.2.upstream/3.38.2upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1680 insertions, 0 deletions

diff --git a/src/nautilus-application.c b/src/nautilus-application.c
new file mode 100644
index 0000000..10478da
--- /dev/null
+++ b/src/nautilus-application.c
@@ -0,0 +1,1680 @@
+/*
+ * nautilus-application: main Nautilus application class.
+ *
+ * Copyright (C) 1999, 2000 Red Hat, Inc.
+ * Copyright (C) 2000, 2001 Eazel, Inc.
+ * Copyright (C) 2010, Cosimo Cecchi <cosimoc@gnome.org>
+ *
+ * Nautilus 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.
+ *
+ * Nautilus 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, see <http://www.gnu.org/licenses/>.
+ *
+ * Authors: Elliot Lee <sopwith@redhat.com>,
+ *          Darin Adler <darin@bentspoon.com>
+ *          Cosimo Cecchi <cosimoc@gnome.org>
+ *
+ */
+
+#include "nautilus-application.h"
+
+#include <eel/eel-gtk-extensions.h>
+#include <eel/eel-stock-dialogs.h>
+#include <fcntl.h>
+#include <gdk/gdk.h>
+#include <gio/gio.h>
+#include <glib/gi18n.h>
+#include <glib/gstdio.h>
+#include <gtk/gtk.h>
+#include <nautilus-extension.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+
+#define DEBUG_FLAG NAUTILUS_DEBUG_APPLICATION
+#include "nautilus-debug.h"
+
+#include "nautilus-bookmark-list.h"
+#include "nautilus-dbus-manager.h"
+#include "nautilus-directory-private.h"
+#include "nautilus-file.h"
+#include "nautilus-files-view.h"
+#include "nautilus-file-operations.h"
+#include "nautilus-file-undo-manager.h"
+#include "nautilus-file-utilities.h"
+#include "nautilus-freedesktop-dbus.h"
+#include "nautilus-global-preferences.h"
+#include "nautilus-icon-info.h"
+#include "nautilus-lib-self-check-functions.h"
+#include "nautilus-module.h"
+#include "nautilus-preferences-window.h"
+#include "nautilus-previewer.h"
+#include "nautilus-profile.h"
+#include "nautilus-progress-persistence-handler.h"
+#include "nautilus-self-check-functions.h"
+#include "nautilus-shell-search-provider.h"
+#include "nautilus-signaller.h"
+#include "nautilus-tag-manager.h"
+#include "nautilus-ui-utilities.h"
+#include "nautilus-view.h"
+#include "nautilus-window-slot.h"
+#include "nautilus-window.h"
+
+typedef struct
+{
+    NautilusProgressPersistenceHandler *progress_handler;
+    NautilusDBusManager *dbus_manager;
+    NautilusFreedesktopDBus *fdb_manager;
+
+    NautilusBookmarkList *bookmark_list;
+
+    NautilusShellSearchProvider *search_provider;
+
+    GList *windows;
+
+    GHashTable *notifications;
+
+    NautilusFileUndoManager *undo_manager;
+
+    NautilusTagManager *tag_manager;
+    GCancellable *tag_manager_cancellable;
+
+    guint previewer_selection_id;
+} NautilusApplicationPrivate;
+
+G_DEFINE_TYPE_WITH_PRIVATE (NautilusApplication, nautilus_application, GTK_TYPE_APPLICATION);
+
+void
+nautilus_application_set_accelerator (GApplication *app,
+                                      const gchar  *action_name,
+                                      const gchar  *accel)
+{
+    const gchar *vaccels[] =
+    {
+        accel,
+        NULL
+    };
+
+    gtk_application_set_accels_for_action (GTK_APPLICATION (app), action_name, vaccels);
+}
+
+void
+nautilus_application_set_accelerators (GApplication  *app,
+                                       const gchar   *action_name,
+                                       const gchar  **accels)
+{
+    gtk_application_set_accels_for_action (GTK_APPLICATION (app), action_name, accels);
+}
+
+GList *
+nautilus_application_get_windows (NautilusApplication *self)
+{
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+
+    return priv->windows;
+}
+
+NautilusBookmarkList *
+nautilus_application_get_bookmarks (NautilusApplication *self)
+{
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+
+    if (!priv->bookmark_list)
+    {
+        priv->bookmark_list = nautilus_bookmark_list_new ();
+    }
+
+    return priv->bookmark_list;
+}
+
+static gboolean
+check_required_directories (NautilusApplication *self)
+{
+    char *user_directory;
+    GSList *directories;
+    gboolean ret;
+
+    g_assert (NAUTILUS_IS_APPLICATION (self));
+
+    nautilus_profile_start (NULL);
+
+    ret = TRUE;
+
+    user_directory = nautilus_get_user_directory ();
+
+    directories = NULL;
+
+    if (!g_file_test (user_directory, G_FILE_TEST_IS_DIR))
+    {
+        directories = g_slist_prepend (directories, user_directory);
+    }
+
+    if (directories != NULL)
+    {
+        int failed_count;
+        GString *directories_as_string;
+        GSList *l;
+        char *error_string;
+        g_autofree char *detail_string = NULL;
+        GtkDialog *dialog;
+
+        ret = FALSE;
+
+        failed_count = g_slist_length (directories);
+
+        directories_as_string = g_string_new ((const char *) directories->data);
+        for (l = directories->next; l != NULL; l = l->next)
+        {
+            g_string_append_printf (directories_as_string, ", %s", (const char *) l->data);
+        }
+
+        error_string = _("Oops! Something went wrong.");
+        if (failed_count == 1)
+        {
+            detail_string = g_strdup_printf (_("Unable to create a required folder. "
+                                               "Please create the following folder, or "
+                                               "set permissions such that it can be created:\n%s"),
+                                             directories_as_string->str);
+        }
+        else
+        {
+            detail_string = g_strdup_printf (_("Unable to create required folders. "
+                                               "Please create the following folders, or "
+                                               "set permissions such that they can be created:\n%s"),
+                                             directories_as_string->str);
+        }
+
+        dialog = show_dialog (error_string, detail_string, NULL, GTK_MESSAGE_ERROR);
+        /* We need the main event loop so the user has a chance to see the dialog. */
+        gtk_application_add_window (GTK_APPLICATION (self),
+                                    GTK_WINDOW (dialog));
+
+        g_string_free (directories_as_string, TRUE);
+    }
+
+    g_slist_free (directories);
+    g_free (user_directory);
+    nautilus_profile_end (NULL);
+
+    return ret;
+}
+
+static void
+menu_provider_items_updated_handler (NautilusMenuProvider *provider,
+                                     GtkWidget            *parent_window,
+                                     gpointer              data)
+{
+    g_signal_emit_by_name (nautilus_signaller_get_current (),
+                           "popup-menu-changed");
+}
+
+static void
+menu_provider_init_callback (void)
+{
+    GList *providers;
+    GList *l;
+
+    providers = nautilus_module_get_extensions_for_type (NAUTILUS_TYPE_MENU_PROVIDER);
+
+    for (l = providers; l != NULL; l = l->next)
+    {
+        NautilusMenuProvider *provider = NAUTILUS_MENU_PROVIDER (l->data);
+
+        g_signal_connect_after (G_OBJECT (provider), "items-updated",
+                                (GCallback) menu_provider_items_updated_handler,
+                                NULL);
+    }
+
+    nautilus_module_extension_list_free (providers);
+}
+
+NautilusWindow *
+nautilus_application_create_window (NautilusApplication *self,
+                                    GdkScreen           *screen)
+{
+    NautilusWindow *window;
+    gboolean maximized;
+    g_autoptr (GVariant) default_size = NULL;
+    gint default_width = 0;
+    gint default_height = 0;
+
+    g_return_val_if_fail (NAUTILUS_IS_APPLICATION (self), NULL);
+    nautilus_profile_start (NULL);
+
+    window = nautilus_window_new (screen);
+
+    maximized = g_settings_get_boolean
+                    (nautilus_window_state, NAUTILUS_WINDOW_STATE_MAXIMIZED);
+    if (maximized)
+    {
+        gtk_window_maximize (GTK_WINDOW (window));
+    }
+    else
+    {
+        gtk_window_unmaximize (GTK_WINDOW (window));
+    }
+    default_size = g_settings_get_value (nautilus_window_state,
+                                         NAUTILUS_WINDOW_STATE_INITIAL_SIZE);
+
+    g_variant_get (default_size, "(ii)", &default_width, &default_height);
+
+    gtk_window_set_default_size (GTK_WINDOW (window),
+                                 MAX (NAUTILUS_WINDOW_MIN_WIDTH, default_width),
+                                 MAX (NAUTILUS_WINDOW_MIN_HEIGHT, default_height));
+
+    if (g_strcmp0 (PROFILE, "") != 0)
+    {
+        GtkStyleContext *style_context;
+
+        style_context = gtk_widget_get_style_context (GTK_WIDGET (window));
+
+        gtk_style_context_add_class (style_context, "devel");
+    }
+
+    DEBUG ("Creating a new navigation window");
+    nautilus_profile_end (NULL);
+
+    return window;
+}
+
+static NautilusWindowSlot *
+get_window_slot_for_location (NautilusApplication *self,
+                              GFile               *location)
+{
+    NautilusApplicationPrivate *priv;
+    NautilusWindowSlot *slot;
+    NautilusWindow *window;
+    NautilusFile *file;
+    GList *l, *sl;
+
+    priv = nautilus_application_get_instance_private (self);
+    slot = NULL;
+    file = nautilus_file_get (location);
+
+    if (!nautilus_file_is_directory (file) && !nautilus_file_is_other_locations (file) &&
+        g_file_has_parent (location, NULL))
+    {
+        location = g_file_get_parent (location);
+    }
+    else
+    {
+        g_object_ref (location);
+    }
+
+    for (l = priv->windows; l != NULL; l = l->next)
+    {
+        window = l->data;
+
+        for (sl = nautilus_window_get_slots (window); sl; sl = sl->next)
+        {
+            NautilusWindowSlot *current = sl->data;
+            GFile *slot_location = nautilus_window_slot_get_location (current);
+
+            if (slot_location && g_file_equal (slot_location, location))
+            {
+                slot = current;
+                break;
+            }
+        }
+
+        if (slot)
+        {
+            break;
+        }
+    }
+
+    nautilus_file_unref (file);
+    g_object_unref (location);
+
+    return slot;
+}
+
+void
+nautilus_application_open_location_full (NautilusApplication     *self,
+                                         GFile                   *location,
+                                         NautilusWindowOpenFlags  flags,
+                                         GList                   *selection,
+                                         NautilusWindow          *target_window,
+                                         NautilusWindowSlot      *target_slot)
+{
+    NAUTILUS_APPLICATION_CLASS (G_OBJECT_GET_CLASS (self))->open_location_full (self,
+                                                                                location,
+                                                                                flags,
+                                                                                selection,
+                                                                                target_window,
+                                                                                target_slot);
+}
+
+static void
+real_open_location_full (NautilusApplication     *self,
+                         GFile                   *location,
+                         NautilusWindowOpenFlags  flags,
+                         GList                   *selection,
+                         NautilusWindow          *target_window,
+                         NautilusWindowSlot      *target_slot)
+{
+    NautilusWindowSlot *active_slot = NULL;
+    NautilusWindow *active_window;
+    GFile *old_location = NULL;
+    char *old_uri, *new_uri;
+    gboolean use_same;
+    GdkScreen *screen;
+
+    use_same = TRUE;
+    /* FIXME: We are having problems on getting the current focused window with
+     * gtk_application_get_active_window, see https://bugzilla.gnome.org/show_bug.cgi?id=756499
+     * so what we do is never rely on this on the callers, but would be cool to
+     * make it work withouth explicitly setting the active window on the callers. */
+    active_window = NAUTILUS_WINDOW (gtk_application_get_active_window (GTK_APPLICATION (self)));
+    /* There is no active window if the application is run with
+     * --gapplication-service
+     */
+    if (active_window)
+    {
+        active_slot = nautilus_window_get_active_slot (active_window);
+        /* Just for debug.*/
+        old_location = nautilus_window_slot_get_location (active_slot);
+    }
+
+
+    /* this happens at startup */
+    if (old_location == NULL)
+    {
+        old_uri = g_strdup ("(none)");
+    }
+    else
+    {
+        old_uri = g_file_get_uri (old_location);
+    }
+
+    new_uri = g_file_get_uri (location);
+
+    DEBUG ("Application opening location, old: %s, new: %s", old_uri, new_uri);
+    nautilus_profile_start ("Application opening location, old: %s, new: %s", old_uri, new_uri);
+
+    g_free (old_uri);
+    g_free (new_uri);
+    /* end debug */
+
+    /* In case a target slot is provided, we can use it's associated window.
+     * In case a target window were given as well, we give preference to the
+     * slot we target at */
+    if (target_slot != NULL)
+    {
+        target_window = nautilus_window_slot_get_window (target_slot);
+    }
+
+    g_assert (!((flags & NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW) != 0 &&
+                (flags & NAUTILUS_WINDOW_OPEN_FLAG_NEW_TAB) != 0));
+
+    /* and if the flags specify so, this is overridden */
+    if ((flags & NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW) != 0)
+    {
+        use_same = FALSE;
+    }
+
+    /* now get/create the window */
+    if (use_same)
+    {
+        if (!target_window)
+        {
+            if (!target_slot)
+            {
+                target_window = active_window;
+            }
+            else
+            {
+                target_window = nautilus_window_slot_get_window (target_slot);
+            }
+        }
+    }
+    else
+    {
+        screen = active_window != NULL ?
+                 gtk_window_get_screen (GTK_WINDOW (active_window)) :
+                 gdk_screen_get_default ();
+
+        target_window = nautilus_application_create_window (self, screen);
+        /* Whatever the caller says, the slot won't be the same */
+        target_slot = NULL;
+    }
+
+    g_assert (target_window != NULL);
+
+    /* Application is the one that manages windows, so this flag shouldn't use
+     * it anymore by any client */
+    flags &= ~NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW;
+    nautilus_window_open_location_full (target_window, location, flags, selection, target_slot);
+}
+
+static NautilusWindow *
+open_window (NautilusApplication *self,
+             GFile               *location)
+{
+    NautilusWindow *window;
+
+    nautilus_profile_start (NULL);
+    window = nautilus_application_create_window (self, gdk_screen_get_default ());
+
+    if (location != NULL)
+    {
+        nautilus_application_open_location_full (self, location, 0, NULL, window, NULL);
+    }
+    else
+    {
+        GFile *home;
+        home = g_file_new_for_path (g_get_home_dir ());
+        nautilus_application_open_location_full (self, home, 0, NULL, window, NULL);
+
+        g_object_unref (home);
+    }
+
+    nautilus_profile_end (NULL);
+
+    return window;
+}
+
+void
+nautilus_application_open_location (NautilusApplication *self,
+                                    GFile               *location,
+                                    GFile               *selection,
+                                    const char          *startup_id)
+{
+    NautilusWindow *window;
+    NautilusWindowSlot *slot;
+    GList *sel_list = NULL;
+
+    nautilus_profile_start (NULL);
+
+    if (selection != NULL)
+    {
+        sel_list = g_list_prepend (sel_list, nautilus_file_get (selection));
+    }
+
+    slot = get_window_slot_for_location (self, location);
+
+    if (!slot)
+    {
+        window = nautilus_application_create_window (self, gdk_screen_get_default ());
+    }
+    else
+    {
+        window = nautilus_window_slot_get_window (slot);
+    }
+
+    nautilus_application_open_location_full (self, location, 0, sel_list, window, slot);
+
+    if (sel_list != NULL)
+    {
+        nautilus_file_list_free (sel_list);
+    }
+
+    nautilus_profile_end (NULL);
+}
+
+/* Note: when launched from command line we do not reach this method
+ * since we manually handle the command line parameters in order to
+ * parse --version, --check, etc.
+ * However this method is called when open () is called via dbus, for
+ * instance when gtk_uri_open () is called from outside.
+ */
+static void
+nautilus_application_open (GApplication  *app,
+                           GFile        **files,
+                           gint           n_files,
+                           const gchar   *hint)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    gboolean force_new = (g_strcmp0 (hint, "new-window") == 0);
+    NautilusWindowSlot *slot = NULL;
+    GFile *file;
+    gint idx;
+
+    DEBUG ("Open called on the GApplication instance; %d files", n_files);
+
+    /* Open windows at each requested location. */
+    for (idx = 0; idx < n_files; idx++)
+    {
+        file = files[idx];
+
+        if (!force_new)
+        {
+            slot = get_window_slot_for_location (self, file);
+        }
+
+        if (!slot)
+        {
+            open_window (self, file);
+        }
+        else
+        {
+            /* We open the location again to update any possible selection */
+            nautilus_application_open_location_full (NAUTILUS_APPLICATION (app), file, 0, NULL, NULL, slot);
+        }
+    }
+}
+
+static void
+nautilus_application_finalize (GObject *object)
+{
+    NautilusApplication *self;
+    NautilusApplicationPrivate *priv;
+
+    self = NAUTILUS_APPLICATION (object);
+    priv = nautilus_application_get_instance_private (self);
+
+    g_clear_object (&priv->progress_handler);
+    g_clear_object (&priv->bookmark_list);
+
+    g_clear_object (&priv->fdb_manager);
+
+    g_list_free (priv->windows);
+
+    g_hash_table_destroy (priv->notifications);
+
+    g_clear_object (&priv->undo_manager);
+
+    g_clear_object (&priv->tag_manager);
+
+    g_cancellable_cancel (priv->tag_manager_cancellable);
+    g_clear_object (&priv->tag_manager_cancellable);
+
+    G_OBJECT_CLASS (nautilus_application_parent_class)->finalize (object);
+}
+
+static gboolean
+do_cmdline_sanity_checks (NautilusApplication *self,
+                          GVariantDict        *options)
+{
+    gboolean retval = FALSE;
+
+    if (g_variant_dict_contains (options, "check") &&
+        (g_variant_dict_contains (options, G_OPTION_REMAINING) ||
+         g_variant_dict_contains (options, "quit")))
+    {
+        g_printerr ("%s\n",
+                    _("--check cannot be used with other options."));
+        goto out;
+    }
+
+    if (g_variant_dict_contains (options, "quit") &&
+        g_variant_dict_contains (options, G_OPTION_REMAINING))
+    {
+        g_printerr ("%s\n",
+                    _("--quit cannot be used with URIs."));
+        goto out;
+    }
+
+
+    if (g_variant_dict_contains (options, "select") &&
+        !g_variant_dict_contains (options, G_OPTION_REMAINING))
+    {
+        g_printerr ("%s\n",
+                    _("--select must be used with at least an URI."));
+        goto out;
+    }
+
+    retval = TRUE;
+
+out:
+    return retval;
+}
+
+static int
+do_perform_self_checks (void)
+{
+#ifndef NAUTILUS_OMIT_SELF_CHECK
+    gtk_init (NULL, NULL);
+
+    nautilus_profile_start (NULL);
+    /* Run the checks (each twice) for nautilus and libnautilus-private. */
+
+    nautilus_run_self_checks ();
+    nautilus_run_lib_self_checks ();
+    eel_exit_if_self_checks_failed ();
+
+    nautilus_run_self_checks ();
+    nautilus_run_lib_self_checks ();
+    eel_exit_if_self_checks_failed ();
+    nautilus_profile_end (NULL);
+#endif
+
+    return EXIT_SUCCESS;
+}
+
+static void
+nautilus_application_select (NautilusApplication  *self,
+                             GFile               **files,
+                             gint                  len)
+{
+    int i;
+    GFile *file;
+    GFile *parent;
+
+    for (i = 0; i < len; i++)
+    {
+        file = files[i];
+        parent = g_file_get_parent (file);
+        if (parent != NULL)
+        {
+            nautilus_application_open_location (self, parent, file, NULL);
+            g_object_unref (parent);
+        }
+        else
+        {
+            nautilus_application_open_location (self, file, NULL, NULL);
+        }
+    }
+}
+
+static void
+action_new_window (GSimpleAction *action,
+                   GVariant      *parameter,
+                   gpointer       user_data)
+{
+    NautilusApplication *application;
+    g_autoptr (GFile) home = NULL;
+
+    application = NAUTILUS_APPLICATION (user_data);
+    home = g_file_new_for_path (g_get_home_dir ());
+
+    nautilus_application_open_location_full (application, home,
+                                             NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW,
+                                             NULL, NULL, NULL);
+}
+
+static void
+action_clone_window (GSimpleAction *action,
+                     GVariant      *parameter,
+                     gpointer       user_data)
+{
+    NautilusWindowSlot *active_slot = NULL;
+    NautilusWindow *active_window = NULL;
+    GtkApplication *application = user_data;
+    g_autoptr (GFile) location = NULL;
+    NautilusView *current_view;
+
+    active_window = NAUTILUS_WINDOW (gtk_application_get_active_window (application));
+    active_slot = nautilus_window_get_active_slot (active_window);
+    current_view = nautilus_window_slot_get_current_view (active_slot);
+
+    if (current_view != NULL &&
+        nautilus_view_is_searching (current_view))
+    {
+        location = g_file_new_for_path (g_get_home_dir ());
+    }
+    else
+    {
+        /* If the user happens to fall asleep while holding ctrl-n, or very
+         * unfortunately opens a new window at a remote location, the current
+         * location will be null, leading to criticals and/or failed assertions.
+         *
+         * Another sad thing is that checking if the view/slot is loading will
+         * not work, as the loading process only really begins after the attributes
+         * for the file have been fetched.
+         */
+        location = nautilus_window_slot_get_location (active_slot);
+        if (location == NULL)
+        {
+            location = nautilus_window_slot_get_pending_location (active_slot);
+        }
+    }
+
+    nautilus_application_open_location_full (NAUTILUS_APPLICATION (application), location,
+                                             NAUTILUS_WINDOW_OPEN_FLAG_NEW_WINDOW, NULL, NULL, NULL);
+}
+
+static void
+action_preferences (GSimpleAction *action,
+                    GVariant      *parameter,
+                    gpointer       user_data)
+{
+    GtkApplication *application = user_data;
+    nautilus_preferences_window_show (gtk_application_get_active_window (application));
+}
+
+static void
+action_about (GSimpleAction *action,
+              GVariant      *parameter,
+              gpointer       user_data)
+{
+    GtkApplication *application = user_data;
+
+    nautilus_window_show_about_dialog (NAUTILUS_WINDOW (gtk_application_get_active_window (application)));
+}
+
+static void
+action_help (GSimpleAction *action,
+             GVariant      *parameter,
+             gpointer       user_data)
+{
+    GtkWindow *window;
+    GtkWidget *dialog;
+    GtkApplication *application = user_data;
+    GError *error = NULL;
+
+    window = gtk_application_get_active_window (application);
+    gtk_show_uri_on_window (window, "help:gnome-help/files",
+                            gtk_get_current_event_time (), &error);
+
+    if (error)
+    {
+        dialog = gtk_message_dialog_new (window ? GTK_WINDOW (window) : NULL,
+                                         GTK_DIALOG_MODAL,
+                                         GTK_MESSAGE_ERROR,
+                                         GTK_BUTTONS_OK,
+                                         _("There was an error displaying help: \n%s"),
+                                         error->message);
+        g_signal_connect (G_OBJECT (dialog), "response",
+                          G_CALLBACK (gtk_widget_destroy),
+                          NULL);
+
+        gtk_window_set_resizable (GTK_WINDOW (dialog), FALSE);
+        gtk_widget_show (dialog);
+        g_error_free (error);
+    }
+}
+
+static void
+action_kill (GSimpleAction *action,
+             GVariant      *parameter,
+             gpointer       user_data)
+{
+    GtkApplication *application = user_data;
+
+    /* we have been asked to force quit */
+    g_application_quit (G_APPLICATION (application));
+}
+
+static void
+action_quit (GSimpleAction *action,
+             GVariant      *parameter,
+             gpointer       user_data)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (user_data);
+    GList *windows, *l;
+
+    windows = nautilus_application_get_windows (self);
+    /* make a copy, since the original list will be modified when destroying
+     * a window, making this list invalid */
+    windows = g_list_copy (windows);
+    for (l = windows; l != NULL; l = l->next)
+    {
+        nautilus_window_close (l->data);
+    }
+
+    g_list_free (windows);
+}
+
+static void
+action_show_hide_sidebar (GObject    *object,
+                          GParamSpec *pspec,
+                          gpointer   *user_data)
+{
+    GList *window, *windows;
+    GVariant *state = g_action_get_state (G_ACTION (object));
+
+    windows = gtk_application_get_windows (GTK_APPLICATION (user_data));
+
+    for (window = windows; window != NULL; window = window->next)
+    {
+        if (g_variant_get_boolean (state))
+        {
+            nautilus_window_show_sidebar (window->data);
+        }
+        else
+        {
+            nautilus_window_hide_sidebar (window->data);
+        }
+    }
+}
+
+static void
+action_show_help_overlay (GSimpleAction *action,
+                          GVariant      *state,
+                          gpointer       user_data)
+{
+    GtkApplication *application = user_data;
+    GtkWindow *window = gtk_application_get_active_window (application);
+
+    g_action_group_activate_action (G_ACTION_GROUP (window), "show-help-overlay", NULL);
+}
+
+static gboolean
+variant_get_mapping (GValue   *value,
+                     GVariant *variant,
+                     gpointer  user_data)
+{
+    g_value_set_variant (value, variant);
+    return TRUE;
+}
+
+static GVariant *
+variant_set_mapping (const GValue       *value,
+                     const GVariantType *expected_type,
+                     gpointer            user_data)
+{
+    return g_value_get_variant (value);
+}
+
+const static GActionEntry app_entries[] =
+{
+    { "new-window", action_new_window, NULL, NULL, NULL },
+    { "clone-window", action_clone_window, NULL, NULL, NULL },
+    { "preferences", action_preferences, NULL, NULL, NULL },
+    { "show-hide-sidebar", NULL, NULL, "true", NULL },
+    { "about", action_about, NULL, NULL, NULL },
+    { "help", action_help, NULL, NULL, NULL },
+    { "quit", action_quit, NULL, NULL, NULL },
+    { "kill", action_kill, NULL, NULL, NULL },
+    { "show-help-overlay", action_show_help_overlay, NULL, NULL, NULL },
+};
+
+static void
+nautilus_init_application_actions (NautilusApplication *app)
+{
+    GAction *sidebar_action;
+
+    g_action_map_add_action_entries (G_ACTION_MAP (app),
+                                     app_entries, G_N_ELEMENTS (app_entries),
+                                     app);
+
+
+    sidebar_action = g_action_map_lookup_action (G_ACTION_MAP (app),
+                                                 "show-hide-sidebar");
+    g_signal_connect (sidebar_action,
+                      "notify::state",
+                      G_CALLBACK (action_show_hide_sidebar),
+                      app);
+    g_settings_bind_with_mapping (nautilus_window_state,
+                                  NAUTILUS_WINDOW_STATE_START_WITH_SIDEBAR,
+                                  sidebar_action,
+                                  "state",
+                                  G_SETTINGS_BIND_DEFAULT,
+                                  variant_get_mapping,
+                                  variant_set_mapping,
+                                  NULL, NULL);
+
+    nautilus_application_set_accelerator (G_APPLICATION (app),
+                                          "app.clone-window", "<Primary>n");
+    nautilus_application_set_accelerator (G_APPLICATION (app),
+                                          "app.help", "F1");
+    nautilus_application_set_accelerator (G_APPLICATION (app),
+                                          "app.quit", "<Primary>q");
+    nautilus_application_set_accelerator (G_APPLICATION (app),
+                                          "app.show-hide-sidebar", "F9");
+}
+
+static void
+nautilus_application_activate (GApplication *app)
+{
+    GFile **files;
+
+    DEBUG ("Calling activate");
+
+    files = g_malloc0 (2 * sizeof (GFile *));
+    files[0] = g_file_new_for_path (g_get_home_dir ());
+    nautilus_application_open (app, files, 1, NULL);
+
+    g_object_unref (files[0]);
+    g_free (files);
+}
+
+static gint
+nautilus_application_handle_file_args (NautilusApplication *self,
+                                       GVariantDict        *options)
+{
+    GFile **files;
+    GFile *file;
+    gint idx, len;
+    const gchar * const *remaining = NULL;
+    GPtrArray *file_array;
+
+    g_variant_dict_lookup (options, G_OPTION_REMAINING, "^a&s", &remaining);
+
+    /* Convert args to GFiles */
+    file_array = g_ptr_array_new_full (0, g_object_unref);
+
+    if (remaining)
+    {
+        for (idx = 0; remaining[idx] != NULL; idx++)
+        {
+            gchar *cwd;
+
+            g_variant_dict_lookup (options, "cwd", "s", &cwd);
+            if (cwd == NULL)
+            {
+                file = g_file_new_for_commandline_arg (remaining[idx]);
+            }
+            else
+            {
+                file = g_file_new_for_commandline_arg_and_cwd (remaining[idx], cwd);
+                g_free (cwd);
+            }
+
+            if (nautilus_is_search_directory (file))
+            {
+                g_autofree char *error_string = NULL;
+                error_string = g_strdup_printf (_("“%s” is an internal protocol. "
+                                                  "Opening this location directly is not supported."),
+                                                EEL_SEARCH_URI);
+
+                g_printerr ("%s\n", error_string);
+            }
+            else
+            {
+                g_ptr_array_add (file_array, file);
+            }
+        }
+    }
+    else if (g_variant_dict_contains (options, "new-window"))
+    {
+        file = g_file_new_for_path (g_get_home_dir ());
+        g_ptr_array_add (file_array, file);
+    }
+    else
+    {
+        g_ptr_array_unref (file_array);
+
+        /* No command line options or files, just activate the application */
+        nautilus_application_activate (G_APPLICATION (self));
+        return EXIT_SUCCESS;
+    }
+
+    len = file_array->len;
+    files = (GFile **) file_array->pdata;
+
+    if (g_variant_dict_contains (options, "select"))
+    {
+        nautilus_application_select (self, files, len);
+    }
+    else
+    {
+        /* Create new windows */
+        nautilus_application_open (G_APPLICATION (self), files, len,
+                                   g_variant_dict_contains (options, "new-window") ? "new-window" : "");
+    }
+
+    g_ptr_array_unref (file_array);
+
+    return EXIT_SUCCESS;
+}
+
+static gint
+nautilus_application_command_line (GApplication            *application,
+                                   GApplicationCommandLine *command_line)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (application);
+    gint retval = -1;
+    GVariantDict *options;
+
+    nautilus_profile_start (NULL);
+
+    options = g_application_command_line_get_options_dict (command_line);
+
+    if (g_variant_dict_contains (options, "version"))
+    {
+        g_application_command_line_print (command_line,
+                                          "GNOME nautilus " PACKAGE_VERSION "\n");
+        retval = EXIT_SUCCESS;
+        goto out;
+    }
+
+    if (!do_cmdline_sanity_checks (self, options))
+    {
+        retval = EXIT_FAILURE;
+        goto out;
+    }
+
+    if (g_variant_dict_contains (options, "check"))
+    {
+        retval = do_perform_self_checks ();
+        goto out;
+    }
+
+    if (g_variant_dict_contains (options, "quit"))
+    {
+        DEBUG ("Killing application, as requested");
+        g_action_group_activate_action (G_ACTION_GROUP (application),
+                                        "kill", NULL);
+        goto out;
+    }
+
+    retval = nautilus_application_handle_file_args (self, options);
+
+out:
+    nautilus_profile_end (NULL);
+
+    return retval;
+}
+
+static void
+nautilus_application_init (NautilusApplication *self)
+{
+    static const GOptionEntry options[] =
+    {
+#ifndef NAUTILUS_OMIT_SELF_CHECK
+        { "check", 'c', 0, G_OPTION_ARG_NONE, NULL,
+          N_("Perform a quick set of self-check tests."), NULL },
+#endif
+        { "version", '\0', 0, G_OPTION_ARG_NONE, NULL,
+          N_("Show the version of the program."), NULL },
+        { "new-window", 'w', 0, G_OPTION_ARG_NONE, NULL,
+          N_("Always open a new window for browsing specified URIs"), NULL },
+        { "quit", 'q', 0, G_OPTION_ARG_NONE, NULL,
+          N_("Quit Nautilus."), NULL },
+        { "select", 's', 0, G_OPTION_ARG_NONE, NULL,
+          N_("Select specified URI in parent folder."), NULL },
+        { G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_STRING_ARRAY, NULL, NULL, N_("[URI…]") },
+
+        /* The following are old options which have no effect anymore. We keep
+         * them around for compatibility reasons, e.g. not breaking old scripts.
+         */
+        { "browser", '\0', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, NULL,
+          NULL, NULL },
+        { "geometry", 'g', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_STRING, NULL,
+          NULL, NULL },
+        { "no-default-window", 'n', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, NULL,
+          NULL, NULL },
+        { "no-desktop", '\0', G_OPTION_FLAG_HIDDEN, G_OPTION_ARG_NONE, NULL,
+          NULL, NULL },
+
+        { NULL }
+    };
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+
+    priv->notifications = g_hash_table_new_full (g_str_hash,
+                                                 g_str_equal,
+                                                 g_free,
+                                                 NULL);
+
+    priv->undo_manager = nautilus_file_undo_manager_new ();
+
+    priv->tag_manager_cancellable = g_cancellable_new ();
+    priv->tag_manager = nautilus_tag_manager_get ();
+    nautilus_tag_manager_set_cancellable (priv->tag_manager,
+                                          priv->tag_manager_cancellable);
+
+    g_application_add_main_option_entries (G_APPLICATION (self), options);
+
+    nautilus_ensure_extension_points ();
+    nautilus_ensure_extension_builtins ();
+}
+
+static void
+theme_changed (GtkSettings *settings)
+{
+    static GtkCssProvider *provider = NULL;
+    static GtkCssProvider *permanent_provider = NULL;
+    gchar *theme;
+    GdkScreen *screen;
+    GFile *file;
+
+    g_object_get (settings, "gtk-theme-name", &theme, NULL);
+    screen = gdk_screen_get_default ();
+
+    /* CSS that themes can override */
+    if (g_str_equal (theme, "Adwaita") || g_str_equal (theme, "Adwaita-dark"))
+    {
+        if (provider == NULL)
+        {
+            provider = gtk_css_provider_new ();
+            file = g_file_new_for_uri ("resource:///org/gnome/nautilus/css/Adwaita.css");
+            gtk_css_provider_load_from_file (provider, file, NULL);
+            g_object_unref (file);
+        }
+
+        gtk_style_context_add_provider_for_screen (screen,
+                                                   GTK_STYLE_PROVIDER (provider),
+                                                   GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
+    }
+    else if (provider != NULL)
+    {
+        gtk_style_context_remove_provider_for_screen (screen,
+                                                      GTK_STYLE_PROVIDER (provider));
+        g_clear_object (&provider);
+    }
+
+    /* CSS we want to always load for any theme */
+    if (permanent_provider == NULL)
+    {
+        permanent_provider = gtk_css_provider_new ();
+        file = g_file_new_for_uri ("resource:///org/gnome/nautilus/css/nautilus.css");
+        gtk_css_provider_load_from_file (permanent_provider, file, NULL);
+        /* The behavior of two style providers with the same priority is
+         * undefined and gtk happens to prefer the provider that got added last.
+         * Use a higher priority here to avoid this problem.
+         */
+        gtk_style_context_add_provider_for_screen (screen,
+                                                   GTK_STYLE_PROVIDER (permanent_provider),
+                                                   GTK_STYLE_PROVIDER_PRIORITY_APPLICATION + 1);
+        g_object_unref (file);
+    }
+
+    g_free (theme);
+}
+
+static void
+setup_theme_extensions (void)
+{
+    GtkSettings *settings;
+
+    /* Set up a handler to load our custom css for Adwaita.
+     * See https://bugzilla.gnome.org/show_bug.cgi?id=732959
+     * for a more automatic solution that is still under discussion.
+     */
+    settings = gtk_settings_get_default ();
+    g_signal_connect (settings, "notify::gtk-theme-name", G_CALLBACK (theme_changed), NULL);
+    theme_changed (settings);
+}
+
+NautilusApplication *
+nautilus_application_get_default (void)
+{
+    NautilusApplication *self;
+
+    self = NAUTILUS_APPLICATION (g_application_get_default ());
+
+    return self;
+}
+
+void
+nautilus_application_send_notification (NautilusApplication *self,
+                                        const gchar         *notification_id,
+                                        GNotification       *notification)
+{
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+
+    g_hash_table_add (priv->notifications, g_strdup (notification_id));
+    g_application_send_notification (G_APPLICATION (self), notification_id, notification);
+}
+
+void
+nautilus_application_withdraw_notification (NautilusApplication *self,
+                                            const gchar         *notification_id)
+{
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+    if (!g_hash_table_contains (priv->notifications, notification_id))
+    {
+        return;
+    }
+
+    g_hash_table_remove (priv->notifications, notification_id);
+    g_application_withdraw_notification (G_APPLICATION (self), notification_id);
+}
+
+static void
+update_previewer_selection (NautilusApplication *self,
+                            NautilusWindow      *window)
+{
+    GtkWindow *gtk_window;
+    NautilusWindowSlot *slot;
+    NautilusView *view;
+    GList *selection;
+
+    gtk_window = gtk_application_get_active_window (GTK_APPLICATION (self));
+    if (!NAUTILUS_IS_WINDOW (gtk_window))
+    {
+        return;
+    }
+
+    if (NAUTILUS_WINDOW (gtk_window) != window)
+    {
+        return;
+    }
+
+    slot = nautilus_window_get_active_slot (window);
+    if (slot == NULL)
+    {
+        return;
+    }
+
+    view = nautilus_window_slot_get_current_view (slot);
+    if (!NAUTILUS_IS_FILES_VIEW (view))
+    {
+        return;
+    }
+
+    selection = nautilus_window_slot_get_selection (slot);
+    if (selection != NULL)
+    {
+        nautilus_files_view_preview_update (NAUTILUS_FILES_VIEW (view), selection);
+    }
+}
+
+static void
+on_application_active_window_changed (NautilusApplication *self,
+                                      GParamSpec          *pspec,
+                                      gpointer             user_data)
+{
+    GtkWindow *window;
+
+    window = gtk_application_get_active_window (GTK_APPLICATION (self));
+    if (NAUTILUS_IS_WINDOW (window))
+    {
+        update_previewer_selection (self, NAUTILUS_WINDOW (window));
+    }
+}
+
+static void
+on_application_shutdown (GApplication *application,
+                         gpointer      user_data)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (application);
+    NautilusApplicationPrivate *priv;
+    GList *notification_ids;
+    GList *l;
+    gchar *notification_id;
+
+    priv = nautilus_application_get_instance_private (self);
+    notification_ids = g_hash_table_get_keys (priv->notifications);
+    for (l = notification_ids; l != NULL; l = l->next)
+    {
+        notification_id = l->data;
+
+        g_application_withdraw_notification (application, notification_id);
+    }
+
+    g_list_free (notification_ids);
+
+    nautilus_icon_info_clear_caches ();
+}
+
+static void
+icon_theme_changed_callback (GtkIconTheme *icon_theme,
+                             gpointer      user_data)
+{
+    /* Clear all pixmap caches as the icon => pixmap lookup changed */
+    nautilus_icon_info_clear_caches ();
+
+    /* Tell the world that icons might have changed. We could invent a narrower-scope
+     * signal to mean only "thumbnails might have changed" if this ends up being slow
+     * for some reason.
+     */
+    emit_change_signals_for_all_files_in_all_directories ();
+}
+
+void
+nautilus_application_startup_common (NautilusApplication *self)
+{
+    NautilusApplicationPrivate *priv;
+
+    nautilus_profile_start (NULL);
+    priv = nautilus_application_get_instance_private (self);
+
+    g_application_set_resource_base_path (G_APPLICATION (self), "/org/gnome/nautilus");
+
+    /* chain up to the GTK+ implementation early, so gtk_init()
+     * is called for us.
+     */
+    G_APPLICATION_CLASS (nautilus_application_parent_class)->startup (G_APPLICATION (self));
+
+    gtk_window_set_default_icon_name (APPLICATION_ID);
+
+    setup_theme_extensions ();
+
+    /* initialize preferences and create the global GSettings objects */
+    nautilus_global_preferences_init ();
+
+    /* initialize nautilus modules */
+    nautilus_profile_start ("Modules");
+    nautilus_module_setup ();
+    nautilus_profile_end ("Modules");
+
+    /* attach menu-provider module callback */
+    menu_provider_init_callback ();
+
+    /* Initialize the UI handler singleton for file operations */
+    priv->progress_handler = nautilus_progress_persistence_handler_new (G_OBJECT (self));
+
+    /* Check the user's .nautilus directories and post warnings
+     * if there are problems.
+     */
+    check_required_directories (self);
+
+    nautilus_init_application_actions (self);
+
+    nautilus_tag_manager_maybe_migrate_tracker2_data (priv->tag_manager);
+
+    nautilus_profile_end (NULL);
+
+    g_signal_connect (self, "notify::active-window", G_CALLBACK (on_application_active_window_changed), NULL);
+    g_signal_connect (self, "shutdown", G_CALLBACK (on_application_shutdown), NULL);
+
+    g_signal_connect_object (gtk_icon_theme_get_default (),
+                             "changed",
+                             G_CALLBACK (icon_theme_changed_callback),
+                             NULL, 0);
+}
+
+static void
+nautilus_application_startup (GApplication *app)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    NautilusApplicationPrivate *priv;
+
+    nautilus_profile_start (NULL);
+    priv = nautilus_application_get_instance_private (self);
+
+    /* create DBus manager */
+    priv->fdb_manager = nautilus_freedesktop_dbus_new ();
+    nautilus_application_startup_common (self);
+
+    nautilus_profile_end (NULL);
+}
+
+static gboolean
+nautilus_application_dbus_register (GApplication     *app,
+                                    GDBusConnection  *connection,
+                                    const gchar      *object_path,
+                                    GError          **error)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+    priv->dbus_manager = nautilus_dbus_manager_new ();
+    if (!nautilus_dbus_manager_register (priv->dbus_manager, connection, error))
+    {
+        return FALSE;
+    }
+
+    priv->search_provider = nautilus_shell_search_provider_new ();
+    if (!nautilus_shell_search_provider_register (priv->search_provider, connection, error))
+    {
+        return FALSE;
+    }
+
+    priv->previewer_selection_id = nautilus_previewer_connect_selection_event (connection);
+
+    return TRUE;
+}
+
+static void
+nautilus_application_dbus_unregister (GApplication    *app,
+                                      GDBusConnection *connection,
+                                      const gchar     *object_path)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+    if (priv->dbus_manager)
+    {
+        nautilus_dbus_manager_unregister (priv->dbus_manager);
+        g_clear_object (&priv->dbus_manager);
+    }
+
+    if (priv->search_provider)
+    {
+        nautilus_shell_search_provider_unregister (priv->search_provider);
+        g_clear_object (&priv->search_provider);
+    }
+
+    if (priv->previewer_selection_id != 0)
+    {
+        nautilus_previewer_disconnect_selection_event (connection,
+                                                       priv->previewer_selection_id);
+        priv->previewer_selection_id = 0;
+    }
+}
+
+static void
+update_dbus_opened_locations (NautilusApplication *self)
+{
+    NautilusApplicationPrivate *priv;
+    gint i;
+    GList *l, *sl;
+    GList *locations = NULL;
+    gsize locations_size = 0;
+    gchar **locations_array;
+    NautilusWindow *window;
+    GFile *location;
+    const gchar *dbus_object_path = NULL;
+
+    g_autoptr (GVariant) windows_to_locations = NULL;
+    GVariantBuilder windows_to_locations_builder;
+
+    g_return_if_fail (NAUTILUS_IS_APPLICATION (self));
+
+    priv = nautilus_application_get_instance_private (self);
+
+    /* Children of nautilus application could not handle the dbus, so don't
+     * do anything in that case */
+    if (!priv->fdb_manager)
+    {
+        return;
+    }
+
+    dbus_object_path = g_application_get_dbus_object_path (G_APPLICATION (self));
+
+    g_return_if_fail (dbus_object_path);
+
+    g_variant_builder_init (&windows_to_locations_builder, G_VARIANT_TYPE ("a{sas}"));
+
+    for (l = priv->windows; l != NULL; l = l->next)
+    {
+        guint32 id;
+        g_autofree gchar *path = NULL;
+        GVariantBuilder locations_in_window_builder;
+
+        window = l->data;
+
+        g_variant_builder_init (&locations_in_window_builder, G_VARIANT_TYPE ("as"));
+
+        for (sl = nautilus_window_get_slots (window); sl; sl = sl->next)
+        {
+            NautilusWindowSlot *slot = sl->data;
+            location = nautilus_window_slot_get_location (slot);
+
+            if (location != NULL)
+            {
+                gchar *uri = g_file_get_uri (location);
+                GList *found = g_list_find_custom (locations, uri, (GCompareFunc) g_strcmp0);
+
+                g_variant_builder_add (&locations_in_window_builder, "s", uri);
+
+                if (!found)
+                {
+                    locations = g_list_prepend (locations, uri);
+                    ++locations_size;
+                }
+                else
+                {
+                    g_free (uri);
+                }
+            }
+        }
+
+        id = gtk_application_window_get_id (GTK_APPLICATION_WINDOW (window));
+        path = g_strdup_printf ("%s/window/%u", dbus_object_path, id);
+        g_variant_builder_add (&windows_to_locations_builder, "{sas}", path, &locations_in_window_builder);
+        g_variant_builder_clear (&locations_in_window_builder);
+    }
+
+    locations_array = g_new (gchar *, locations_size + 1);
+
+    for (i = 0, l = locations; l; l = l->next, ++i)
+    {
+        /* We reuse the locations string locations saved on list */
+        locations_array[i] = l->data;
+    }
+
+    locations_array[locations_size] = NULL;
+
+    nautilus_freedesktop_dbus_set_open_locations (priv->fdb_manager,
+                                                  (const gchar **) locations_array);
+
+    windows_to_locations = g_variant_ref_sink (g_variant_builder_end (&windows_to_locations_builder));
+    nautilus_freedesktop_dbus_set_open_windows_with_locations (priv->fdb_manager,
+                                                               windows_to_locations);
+
+    g_free (locations_array);
+    g_list_free_full (locations, g_free);
+}
+
+static void
+on_slot_location_changed (NautilusWindowSlot  *slot,
+                          GParamSpec          *pspec,
+                          NautilusApplication *self)
+{
+    update_dbus_opened_locations (self);
+}
+
+static void
+on_slot_added (NautilusWindow      *window,
+               NautilusWindowSlot  *slot,
+               NautilusApplication *self)
+{
+    if (nautilus_window_slot_get_location (slot))
+    {
+        update_dbus_opened_locations (self);
+    }
+
+    g_signal_connect (slot, "notify::location", G_CALLBACK (on_slot_location_changed), self);
+}
+
+static void
+on_slot_removed (NautilusWindow      *window,
+                 NautilusWindowSlot  *slot,
+                 NautilusApplication *self)
+{
+    update_dbus_opened_locations (self);
+
+    g_signal_handlers_disconnect_by_func (slot, on_slot_location_changed, self);
+}
+
+static void
+on_active_selection_changed (NautilusWindow      *window,
+                             NautilusApplication *self)
+{
+    update_previewer_selection (self, window);
+}
+
+static void
+nautilus_application_window_added (GtkApplication *app,
+                                   GtkWindow      *window)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+    GTK_APPLICATION_CLASS (nautilus_application_parent_class)->window_added (app, window);
+
+    if (NAUTILUS_IS_WINDOW (window))
+    {
+        priv->windows = g_list_prepend (priv->windows, window);
+        g_signal_connect (window, "slot-added", G_CALLBACK (on_slot_added), app);
+        g_signal_connect (window, "slot-removed", G_CALLBACK (on_slot_removed), app);
+        g_signal_connect (window, "active-selection-changed", G_CALLBACK (on_active_selection_changed), app);
+    }
+}
+
+static void
+nautilus_application_window_removed (GtkApplication *app,
+                                     GtkWindow      *window)
+{
+    NautilusApplication *self = NAUTILUS_APPLICATION (app);
+    NautilusApplicationPrivate *priv;
+
+    priv = nautilus_application_get_instance_private (self);
+
+    GTK_APPLICATION_CLASS (nautilus_application_parent_class)->window_removed (app, window);
+
+    if (NAUTILUS_IS_WINDOW (window))
+    {
+        priv->windows = g_list_remove_all (priv->windows, window);
+        g_signal_handlers_disconnect_by_func (window, on_slot_added, app);
+        g_signal_handlers_disconnect_by_func (window, on_slot_removed, app);
+        g_signal_handlers_disconnect_by_func (window, on_active_selection_changed, app);
+    }
+
+    /* if this was the last window, close the previewer */
+    if (g_list_length (priv->windows) == 0)
+    {
+        nautilus_previewer_call_close ();
+        nautilus_progress_persistence_handler_make_persistent (priv->progress_handler);
+    }
+}
+
+/* Manage the local instance command line options. This is only necessary to
+ * resolve correctly relative paths, since if the main instance resolve them in
+ * open(), it will do it with its current cwd, which may not be correct for the
+ * non main GApplication instance */
+static gint
+nautilus_application_handle_local_options (GApplication *app,
+                                           GVariantDict *options)
+{
+    gchar *cwd;
+
+    cwd = g_get_current_dir ();
+    g_variant_dict_insert (options, "cwd", "s", cwd);
+    g_free (cwd);
+
+    return -1;
+}
+
+static void
+nautilus_application_class_init (NautilusApplicationClass *class)
+{
+    GObjectClass *object_class;
+    GApplicationClass *application_class;
+    GtkApplicationClass *gtkapp_class;
+
+    object_class = G_OBJECT_CLASS (class);
+    object_class->finalize = nautilus_application_finalize;
+
+    application_class = G_APPLICATION_CLASS (class);
+    application_class->startup = nautilus_application_startup;
+    application_class->activate = nautilus_application_activate;
+    application_class->dbus_register = nautilus_application_dbus_register;
+    application_class->dbus_unregister = nautilus_application_dbus_unregister;
+    application_class->open = nautilus_application_open;
+    application_class->command_line = nautilus_application_command_line;
+    application_class->handle_local_options = nautilus_application_handle_local_options;
+
+    class->open_location_full = real_open_location_full;
+
+    gtkapp_class = GTK_APPLICATION_CLASS (class);
+    gtkapp_class->window_added = nautilus_application_window_added;
+    gtkapp_class->window_removed = nautilus_application_window_removed;
+}
+
+NautilusApplication *
+nautilus_application_new (void)
+{
+    return g_object_new (NAUTILUS_TYPE_APPLICATION,
+                         "application-id", APPLICATION_ID,
+                         "flags", G_APPLICATION_HANDLES_COMMAND_LINE | G_APPLICATION_HANDLES_OPEN,
+                         "inactivity-timeout", 12000,
+                         NULL);
+}
+
+void
+nautilus_application_search (NautilusApplication *self,
+                             NautilusQuery       *query)
+{
+    g_autoptr (GFile) location = NULL;
+    NautilusWindow *window;
+
+    location = nautilus_query_get_location (query);
+    window = open_window (self, location);
+    nautilus_window_search (window, query);
+}