CSS keybinding appears to have been broken since the following commit

commit 44ba5d253f5bbda2d5a42c58218ad2aa318256f4
Author: Benjamin Otte <otte@redhat.com>
Date:   Tue Aug 28 17:52:12 2012 +0200

    css: Redo bindings parsing
    
    I want to get away from the ability to have 0-length arrays, all css
    arrays are single element.
    Even if the element is "none", it is still a "none" element.



The following one-line patch makes it work again


diff --git a/gtk/gtkcssstylepropertyimpl.c b/gtk/gtkcssstylepropertyimpl.c
index ea3cb36..c189ea6 100644
--- a/gtk/gtkcssstylepropertyimpl.c
+++ b/gtk/gtkcssstylepropertyimpl.c
@@ -476,7 +476,7 @@ bindings_value_parse_one (GtkCssParser *parser)
       return NULL;
     }
 
-  if (g_ascii_strcasecmp (name, "none"))
+  if (g_ascii_strcasecmp (name, "none") == 0)
     {
       name = NULL;
     }



This can be tested quickly by e.g. creating a ~/.config/gtk-3.0/gtk.css with the following content, then running gtk3-demo and testing that the control-F2 binding is applied in the Text Widget -> Hypertext demo:

@binding-set MyBindings {
  bind "<Control>F2" { "cut-clipboard" () };
}

GtkTextView {
  gtk-key-bindings: MyBindings;
}