[gtk/wip/matthiasc/popup2: 48/51] widget: Don't snapshot foreign children

[Matthias Clasen <matthiasc src gnome org>]

commit df87df0926d294623422468642cedfd98f09d6b8
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Mar 18 07:51:47 2019 -0400

    widget: Don't snapshot foreign children
    
    When snapshotting, we walk down the widget tree.
    We need to skip children that have a different
    root, since those will do their own snapshot.

 gtk/gtkwidget.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/gtk/gtkwidget.c b/gtk/gtkwidget.c
index 5b835c27a5..1238d5c486 100644
--- a/gtk/gtkwidget.c
+++ b/gtk/gtkwidget.c
@@ -791,7 +791,10 @@ gtk_widget_real_snapshot (GtkWidget   *widget,
   for (child = _gtk_widget_get_first_child (widget);
        child != NULL;
        child = _gtk_widget_get_next_sibling (child))
-    gtk_widget_snapshot_child (widget, child, snapshot);
+    {
+      if (gtk_widget_get_root (child) == gtk_widget_get_root (widget))
+        gtk_widget_snapshot_child (widget, child, snapshot);
+    }
 }
 
 static gboolean