Implement runtime feature support for CSS Shorthands

Source/core/scripts/templates/StylePropertyShorthand.cpp.tmpl

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008 Apple Inc. All rights reserved.
  * Copyright (C) 2013 Intel Corporation. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #include "config.h"
 #include "StylePropertyShorthand.h"
+#include "RuntimeEnabledFeatures.h"
 
 #include "wtf/HashMap.h"
 #include "wtf/StdLibExtras.h"
 
 namespace WebCore {
 
 {%- for property_id, property in properties.items() %}
 
 const StylePropertyShorthand& {{ property.camel_case_name }}Shorthand()
 {
     static const CSSPropertyID {{ property.camel_case_name }}Properties[] = {
         {%- for longhand_id in property.camel_case_longhands %}
         {{ longhand_id }},
         {%- endfor %}
     };
     DEFINE_STATIC_LOCAL(StylePropertyShorthand, {{ property.camel_case_name }}Longhands, ({{ property_id }}, {{ property.camel_case_name }}Properties, WTF_ARRAY_LENGTH({{ property.camel_case_name }}Properties)));
     return {{ property.camel_case_name }}Longhands;
 }
 {%- endfor %}
 
 // Returns an empty list if the property is not a shorthand
 const StylePropertyShorthand& shorthandForProperty(CSSPropertyID propertyID)
 {
+    DEFINE_STATIC_LOCAL(StylePropertyShorthand, emptyShorthand, ());
     switch (propertyID) {
 {%- for property_id, property in properties.items() %}
     {%- if property.camel_case_name not in ["width", "height", "marker"] %}
         case {{ property_id }}:
+        {%- if property.runtime_conditional_getter %}
+            if (!RuntimeEnabledFeatures::{{ property.runtime_conditional_getter }}())
+                return emptyShorthand;
+        {%- endif %}
             return {{ property.camel_case_name }}Shorthand();
     {%- endif %}
 {%- endfor %}
     default: {
-        DEFINE_STATIC_LOCAL(StylePropertyShorthand, emptyShorthand, ());
         return emptyShorthand;
     }
     }
 }
 
 typedef HashMap<CSSPropertyID, Vector<StylePropertyShorthand> > longhandsMap;
 const Vector<StylePropertyShorthand> matchingShorthandsForLonghand(CSSPropertyID propertyID)
 {
     DEFINE_STATIC_LOCAL(longhandsMap, map, ());
     if (map.isEmpty()) {
 {%- for longhand_id, shorthands in longhands_dictionary.items() %}
 
         Vector<StylePropertyShorthand, {{ shorthands|length }}> {{ longhand_id }}Shorthands;
         {% for shorthand in shorthands -%}
             {{ longhand_id }}Shorthands.uncheckedAppend({{ shorthand.camel_case_name }}Shorthand());
         {% endfor -%}
         map.set({{ longhand_id }}, {{ longhand_id }}Shorthands);
 {%- endfor %}
     }
     return map.get(propertyID);
 }
 
 } // namespace WebCore