[Variables] Enable get/setProperty and similar APIs from the CSSOM

third_party/WebKit/Source/core/css/StylePropertySerializer.cpp

 /*
  * (C) 1999-2003 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2012 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Research In Motion Limited. 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 "core/css/StylePropertySerializer.h"
 
 #include "core/CSSValueKeywords.h"
 #include "core/StylePropertyShorthand.h"
+#include "core/css/CSSCustomPropertyDeclaration.h"
 #include "core/css/CSSPropertyMetadata.h"
 #include "core/css/CSSValuePool.h"
 #include "wtf/BitArray.h"
 #include "wtf/text/StringBuilder.h"
 
 namespace blink {
 
 static bool isInitialOrInherit(const String& value)
 {
     DEFINE_STATIC_LOCAL(String, initial, ("initial"));
@@ skipping 131 matching lines @@
         return false;
     StylePropertySerializer::PropertyValueForSerializer value = propertyAt(index);
     return value.isImportant();
 }
 
 StylePropertySerializer::StylePropertySerializer(const StylePropertySet& properties)
     : m_propertySet(properties)
 {
 }
 
+String StylePropertySerializer::getCustomPropertyText(const PropertyValueForSerializer& property, bool isNotFirstDecl) const
+{
+    ASSERT(property.id() == CSSPropertyVariable);
+    StringBuilder result;
+    if (isNotFirstDecl)
+        result.append(' ');
+    const CSSCustomPropertyDeclaration* value = toCSSCustomPropertyDeclaration(property.value());
+    result.append(value->name());
+    result.appendLiteral(": ");
+    result.append(value->customCSSText());
+    if (property.isImportant())
+        result.appendLiteral(" !important");
+    result.append(';');
+    return result.toString();
+}
+
 String StylePropertySerializer::getPropertyText(CSSPropertyID propertyID, const String& value, bool isImportant, bool isNotFirstDecl) const
 {
     StringBuilder result;
     if (isNotFirstDecl)
         result.append(' ');
     result.append(getPropertyName(propertyID));
     result.appendLiteral(": ");
     result.append(value);
     if (isImportant)
         result.appendLiteral(" !important");
@@ skipping 147 matching lines @@
         case CSSPropertyWebkitMaskPositionY:
         case CSSPropertyWebkitMaskRepeatX:
         case CSSPropertyWebkitMaskRepeatY:
         case CSSPropertyWebkitMaskImage:
         case CSSPropertyWebkitMaskRepeat:
         case CSSPropertyWebkitMaskPosition:
         case CSSPropertyWebkitMaskClip:
         case CSSPropertyWebkitMaskOrigin:
             shorthandPropertyID = CSSPropertyWebkitMask;
             break;
+        case CSSPropertyVariable:
+            result.append(getCustomPropertyText(property, numDecls++));
+            continue;
         case CSSPropertyAll:
             result.append(getPropertyText(propertyID, property.value()->cssText(), property.isImportant(), numDecls++));
             continue;
         default:
             break;
         }
 
         unsigned shortPropertyIndex = shorthandPropertyID - firstCSSProperty;
         if (shorthandPropertyID) {
             if (shorthandPropertyUsed.get(shortPropertyIndex))
@@ skipping 615 matching lines @@
             isInitialValue = false;
         if (!value->isInheritedValue())
             isInheritedValue = false;
         if (isImportant != m_propertySet.propertyIsImportant(shorthand.properties()[i]))
             return false;
     }
     return isInitialValue || isInheritedValue;
 }
 
 }