[gnome-builder] layoutgrid: only update focus from descendants

[Christian Hergert <chergert src gnome org>]

commit 3ce79fbacfcb7592c69e6a9b386cb640b8ca87e2
Author: Christian Hergert <chergert redhat com>
Date:   Mon May 8 18:04:51 2017 -0700

    layoutgrid: only update focus from descendants
    
    If we get a focus widget that is not a descendant of ours, then ignore
    any further processing of the updated focus.

 libide/workbench/ide-layout-grid.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/libide/workbench/ide-layout-grid.c b/libide/workbench/ide-layout-grid.c
index 40e04b5..23cdad3 100644
--- a/libide/workbench/ide-layout-grid.c
+++ b/libide/workbench/ide-layout-grid.c
@@ -698,6 +698,13 @@ ide_layout_grid_toplevel_set_focus (GtkWidget     *toplevel,
     {
       GtkWidget *parent = focus;
 
+      /*
+       * If this focus widget does not belong to us, then we should just
+       * ignore updating any state now.
+       */
+      if (!gtk_widget_is_ancestor (focus, GTK_WIDGET (self)))
+        return;
+
       while (parent && !IDE_IS_LAYOUT_STACK (parent))
         {
           if (GTK_IS_POPOVER (parent))