[gtk+] reftests: Make label-text-shadow-changes-modify-clip test more reliable

[Matthias Clasen <matthiasc src gnome org>]

commit 1e0ca71ecad59f4349837b1858dc8d2c27155c33
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Jan 31 14:08:35 2016 -0500

    reftests: Make label-text-shadow-changes-modify-clip test more reliable
    
    This test was failing in continuous, where the tests are running
    in a VM with disabled animations. Make the test adapt to that
    situation by changing the rui on the fly if we find that animations
    are disabled.

 .../label-text-shadow-changes-modify-clip.c        |   18 ++++++++++++++++++
 .../label-text-shadow-changes-modify-clip.ui       |    1 +
 2 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/testsuite/reftests/label-text-shadow-changes-modify-clip.c 
b/testsuite/reftests/label-text-shadow-changes-modify-clip.c
index 0507c36..bfb2d60 100644
--- a/testsuite/reftests/label-text-shadow-changes-modify-clip.c
+++ b/testsuite/reftests/label-text-shadow-changes-modify-clip.c
@@ -88,3 +88,21 @@ inhibit_for_3_frames (GtkWidget *widget)
 
   return FALSE;
 }
+
+G_MODULE_EXPORT gboolean
+add_reference_class_if_no_animation (GtkWidget *widget)
+{
+  gboolean enabled;
+  GtkStyleContext *context;
+
+  g_object_get (gtk_widget_get_settings (widget), "gtk-enable-animations", &enabled, NULL);
+  if (enabled)
+    return FALSE;
+
+  g_message ("Adding reference class because animation is disabled");
+
+  context = gtk_widget_get_style_context (widget);
+  gtk_style_context_add_class (context, "reference");
+
+  return FALSE;
+}
diff --git a/testsuite/reftests/label-text-shadow-changes-modify-clip.ui 
b/testsuite/reftests/label-text-shadow-changes-modify-clip.ui
index 0d029fd..3acad7e 100644
--- a/testsuite/reftests/label-text-shadow-changes-modify-clip.ui
+++ b/testsuite/reftests/label-text-shadow-changes-modify-clip.ui
@@ -20,6 +20,7 @@
             <property name="visible">True</property>
             <property name="can_focus">False</property>
             <property name="label" translatable="yes">Hello World</property>
+            <signal name="map" handler="reftest:add_reference_class_if_no_animation" swapped="no"/>
           </object>
           <packing>
             <property name="expand">False</property>