[gtk/issue-1631] switch: Take gadget clip into account

[Emmanuele Bassi <ebassi src gnome org>]

commit 0a9aa768d83bbf5753379c31fb2123c510fdd02f
Author: Emmanuele Bassi <ebassi gnome org>
Date:   Wed Jan 30 17:31:07 2019 +0000

    switch: Take gadget clip into account
    
    Now that we've switched the on and off states to gadgets, we need to
    ensure that the widget's clip take into account the clip of every
    gadget.
    
    Fixes #1631

 gtk/gtkswitch.c | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkswitch.c b/gtk/gtkswitch.c
index 88596c7d1f..a26c97bc28 100644
--- a/gtk/gtkswitch.c
+++ b/gtk/gtkswitch.c
@@ -449,7 +449,8 @@ gtk_switch_allocate_contents (GtkCssGadget        *gadget,
   GtkSwitch *self = GTK_SWITCH (gtk_css_gadget_get_owner (gadget));
   GtkSwitchPrivate *priv = self->priv;
   GtkAllocation child_alloc;
-  
+  GtkAllocation on_clip, off_clip;
+
   child_alloc.x = allocation->x + round (priv->handle_pos * (allocation->width - allocation->width / 2));
   child_alloc.y = allocation->y;
   child_alloc.width = allocation->width / 2;
@@ -465,13 +466,17 @@ gtk_switch_allocate_contents (GtkCssGadget        *gadget,
   gtk_css_gadget_allocate (priv->on_gadget,
                            &child_alloc,
                            baseline,
-                           out_clip);
+                           &on_clip);
+
+  gdk_rectangle_union (out_clip, &on_clip, out_clip);
 
   child_alloc.x = allocation->x + allocation->width - child_alloc.width;
   gtk_css_gadget_allocate (priv->off_gadget,
                            &child_alloc,
                            baseline,
-                           out_clip);
+                           &off_clip);
+
+  gdk_rectangle_union (out_clip, &off_clip, out_clip);
 
   if (gtk_widget_get_realized (GTK_WIDGET (self)))
     {