[gtk+/gtk-3-14] Bug 745957 - GTK+/Quartz >= 3.14.8: Symbol not found: _gtk_drag_cancel

[John Ralls <jralls src gnome org>]

commit 4983d437e3c740b66d98dea857e7c0984a76b53c
Author: John Ralls <jralls ceridwen us>
Date:   Sun May 31 11:52:35 2015 -0700

    Bug 745957 - GTK+/Quartz >= 3.14.8: Symbol not found: _gtk_drag_cancel
    
    Implement gtk_drag_cancel, made public in c160ba069 and 62616a71, in
    gtkdnd-quartz.c.

 gtk/gtkdnd-quartz.c |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkdnd-quartz.c b/gtk/gtkdnd-quartz.c
index 9967ef7..f613e2e 100644
--- a/gtk/gtkdnd-quartz.c
+++ b/gtk/gtkdnd-quartz.c
@@ -62,6 +62,8 @@ static void gtk_drag_source_site_destroy        (gpointer           data);
 static GtkDragSourceInfo *gtk_drag_get_source_info (GdkDragContext *context,
                                                    gboolean        create);
 
+static void gtk_drag_drop_finished (GtkDragSourceInfo *info);
+
 extern GdkDragContext *gdk_quartz_drag_source_context (); /* gdk/quartz/gdkdnd-quartz.c */
 
 struct _GtkDragSourceSite 
@@ -1365,6 +1367,23 @@ gtk_drag_begin (GtkWidget         *widget,
 }
 
 
+/**
+ * gtk_drag_cancel:
+ * @context: a #GdkDragContext, as e.g. returned by gtk_drag_begin_with_coordinates()
+ *
+ */
+void
+gtk_drag_cancel (GdkDragContext *context)
+{
+  GtkDragSourceInfo *info;
+
+  g_return_if_fail (GDK_IS_DRAG_CONTEXT (context));
+
+  info = gtk_drag_get_source_info (context, FALSE);
+  if (info != NULL)
+    gtk_drag_drop_finished (info);
+}
+
 static gboolean
 gtk_drag_source_event_cb (GtkWidget      *widget,
                          GdkEvent       *event,