[gtk+/places-sidebar] Don't use inout ints in the drag-action-requested signal

[Federico Mena Quintero <federico src gnome org>]

commit 63b9598b51bcf95bb4b69437266ba646e94a51eb
Author: Federico Mena Quintero <federico gnome org>
Date:   Wed Feb 27 14:39:39 2013 -0600

    Don't use inout ints in the drag-action-requested signal
    
    It's not friendly to bindings, and we didn't need an inout parameter anyway.
    We use a simple return value from the signal handler now.
    
    Signed-off-by: Federico Mena Quintero <federico gnome org>

 gtk/gtkmarshalers.list |    1 +
 gtk/gtkplacessidebar.c |   42 ++++++++++++++++++++++++++----------------
 2 files changed, 27 insertions(+), 16 deletions(-)
---
diff --git a/gtk/gtkmarshalers.list b/gtk/gtkmarshalers.list
index 8b7ba6e..31977fe 100644
--- a/gtk/gtkmarshalers.list
+++ b/gtk/gtkmarshalers.list
@@ -127,3 +127,4 @@ VOID:POINTER,POINTER,POINTER,POINTER,STRING
 VOID:OBJECT,STRING,POINTER,POINTER
 INT:INT
 VOID:POINTER,STRING,INT
+INT:OBJECT,OBJECT,POINTER
diff --git a/gtk/gtkplacessidebar.c b/gtk/gtkplacessidebar.c
index 2fec612..e0877dd 100644
--- a/gtk/gtkplacessidebar.c
+++ b/gtk/gtkplacessidebar.c
@@ -158,11 +158,10 @@ struct _GtkPlacesSidebarClass {
        void (* show_error_message)    (GtkPlacesSidebar *sidebar,
                                        const char       *primary,
                                        const char       *secondary);
-       void (* drag_action_requested) (GtkPlacesSidebar *sidebar,
-                                       GdkDragContext   *context,
-                                       GFile            *dest_file,
-                                       GList            *source_file_list,
-                                       int              *action);
+       GdkDragAction (* drag_action_requested) (GtkPlacesSidebar *sidebar,
+                                                GdkDragContext   *context,
+                                                GFile            *dest_file,
+                                                GList            *source_file_list);
        GdkDragAction (* drag_action_ask) (GtkPlacesSidebar *sidebar,
                                           GdkDragAction     actions);
        void (* drag_perform_drop) (GtkPlacesSidebar     *sidebar,
@@ -326,18 +325,23 @@ emit_show_error_message (GtkPlacesSidebar *sidebar, const char *primary, const c
                       primary, secondary);
 }
 
-static void
+static GdkDragAction
 emit_drag_action_requested (GtkPlacesSidebar *sidebar,
                            GdkDragContext *context,
                            GFile *dest_file,
-                           GList *source_file_list,
-                           int *action)
+                           GList *source_file_list)
 {
+       GdkDragAction ret_action;
+
+       ret_action = 0;
+
        g_signal_emit (sidebar, places_sidebar_signals[DRAG_ACTION_REQUESTED], 0,
                       context,
                       dest_file,
                       source_file_list,
-                      action);
+                      &ret_action);
+
+       return ret_action;
 }
 
 static GdkDragAction
@@ -1455,7 +1459,7 @@ drag_motion_callback (GtkTreeView *tree_view,
                                if (uri != NULL) {
                                        GFile *dest_file = g_file_new_for_uri (uri);
 
-                                       emit_drag_action_requested (sidebar, context, dest_file, 
sidebar->drag_list, &action);
+                                       action = emit_drag_action_requested (sidebar, context, dest_file, 
sidebar->drag_list);
 
                                        g_object_unref (dest_file);
                                        g_free (uri);
@@ -3802,7 +3806,6 @@ gtk_places_sidebar_class_init (GtkPlacesSidebarClass *class)
         * @context: #GdkDragContext with information about the drag operation
         * @dest_file: #GFile with the tentative location that is being hovered for a drop
         * @source_file_list: (element-type GFile) (transfer none): List of #GFile that are being dragged
-        * @action: Location in which to store the drag action here
         *
         * When the user starts a drag-and-drop operation and the sidebar needs
         * to ask the application for which drag action to perform, then the
@@ -3811,19 +3814,26 @@ gtk_places_sidebar_class_init (GtkPlacesSidebarClass *class)
         * The application can evaluate the @context for customary actions, or
         * it can check the type of the files indicated by @source_file_list against the
         * possible actions for the destination @dest_file.
+        *
+        * The drag action to use must be the return value of the signal handler.
+        *
+        * Return value: The drag action to use, for example, #GDK_ACTION_COPY
+        * or #GDK_ACTION_MOVE, or 0 if no action is allowed here (i.e. drops
+        * are not allowed in the specified @dest_file).
+        *
+        * Since: 3.8
         */
        places_sidebar_signals [DRAG_ACTION_REQUESTED] =
                g_signal_new (I_("drag-action-requested"),
                              G_OBJECT_CLASS_TYPE (gobject_class),
-                             G_SIGNAL_RUN_FIRST,
+                             G_SIGNAL_RUN_LAST,
                              G_STRUCT_OFFSET (GtkPlacesSidebarClass, drag_action_requested),
                              NULL, NULL,
-                             _gtk_marshal_VOID__OBJECT_OBJECT_POINTER_POINTER,
-                             G_TYPE_NONE, 4,
+                             _gtk_marshal_INT__OBJECT_OBJECT_POINTER,
+                             G_TYPE_INT, 3,
                              GDK_TYPE_DRAG_CONTEXT,
                              G_TYPE_OBJECT,
-                             G_TYPE_POINTER, /* GList of GFile */
-                             G_TYPE_POINTER  /* FIXME: (inout int) is there something friendlier to language 
bindings? */);
+                             G_TYPE_POINTER /* GList of GFile */ );
 
        /**
         * GtkPlacesSidebar::drag-action-ask: