#include <config.h>
#include <gtk/gtk.h>

#include "xapp-favorites.h"
#include "favorite-vfs-file.h"

/* Gtk module justification:
 *
 * The sole purpose of this module currently is to add a 'Favorites'
 * shortcut to GtkFileChooser dialogs.
 *
 * In gtk_module_init, the XAppFavorites singleton is initialized, and
 * the 'favorites' uri scheme is added to the default vfs. Ordinarily
 * non-file:// schemes aren't supported in these dialogs unless their
 * 'local-only' property is set to FALSE. Since favorites are shortcuts
 * to locally-available files, we lie to the chooser setup by returning
 * "/" instead of NULL when g_file_get_path ("favorites:///") is called.
 */


/* Make sure GCC doesn't warn us about a missing prototype for this
 * exported function */
void gtk_module_init (gint *argc, gchar ***argv[]);

static gboolean
selection_changed_cb (GSignalInvocationHint *ihint,
            guint                  n_param_values,
            const GValue          *param_values,
            gpointer               data)
{
    GtkFileChooser *chooser = GTK_FILE_CHOOSER (g_value_get_object (&param_values[0]));
    GSList *list, *i;
    gboolean already_applied = FALSE;
    list = gtk_file_chooser_list_shortcut_folder_uris (chooser);

    for (i = list; i != NULL; i = i->next)
    {
        if (g_strcmp0 ((gchar *) i->data, "favorites:///") == 0)
        {
            already_applied = TRUE;
            break;
        }
    }

    g_slist_free_full (list, g_free);

    if (!already_applied)
    {
        xapp_favorites_get_default ();
        gtk_file_chooser_add_shortcut_folder_uri (chooser, "favorites:///", NULL);
    }

    return TRUE;
}

static void
add_chooser_hook (GType type)
{
    GTypeClass *type_class;
    guint sigid;

    type_class = g_type_class_ref (type);

    sigid = g_signal_lookup ("selection-changed", type);
    g_signal_add_emission_hook (sigid, 0, selection_changed_cb, NULL, NULL);

    g_type_class_unref (type_class);
}

G_MODULE_EXPORT void gtk_module_init (gint *argc, gchar ***argv[]) {
    // This won't instantiate XAppFavorites but will register the uri so
    // it can be used by apps (like pix which doesn't use the favorites api,
    // but just adds favorites:/// to its sidebar.)
    init_favorite_vfs ();

    add_chooser_hook (GTK_TYPE_FILE_CHOOSER_WIDGET);
    add_chooser_hook (GTK_TYPE_FILE_CHOOSER_DIALOG);
    add_chooser_hook (GTK_TYPE_FILE_CHOOSER_BUTTON);
}

G_MODULE_EXPORT gchar* g_module_check_init (GModule *module);

G_MODULE_EXPORT gchar* g_module_check_init (GModule *module) {
        g_module_make_resident(module);
        return NULL;
}