Partial implementation of CSSVariablesMap for CSS Variables CSSOM

Source/core/css/PropertySetCSSStyleDeclaration.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.
  *
  * 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/PropertySetCSSStyleDeclaration.h"
 
 #include "HTMLNames.h"
+#include "RuntimeEnabledFeatures.h"
 #include "core/css/CSSParser.h"
 #include "core/css/CSSStyleSheet.h"
 #include "core/css/StylePropertySet.h"
 #include "core/dom/Element.h"
 #include "core/dom/MutationObserverInterestGroup.h"
 #include "core/dom/MutationRecord.h"
 #include "core/dom/WebCoreMemoryInstrumentation.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include <wtf/MemoryInstrumentationHashMap.h>
 
@@ skipping 237 matching lines @@
 
     ec = 0;
     bool changed = m_propertySet->setProperty(propertyID, value, important, contextStyleSheet());
 
     didMutate(changed ? PropertyChanged : NoChanges);
 
     if (changed)
         mutationScope.enqueueMutationRecord();
 }
 
+unsigned PropertySetCSSStyleDeclaration::variableCount() const
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    return m_propertySet->variableCount();
+}
+
+String PropertySetCSSStyleDeclaration::variableValue(const AtomicString& name) const
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    return m_propertySet->variableValue(name);
+}
+
+void PropertySetCSSStyleDeclaration::setVariableValue(const AtomicString& name, const String& value, ExceptionCode& ec)
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    StyleAttributeMutationScope mutationScope(this);
+    willMutate();
+    bool changed = m_propertySet->setVariableValue(name, value, ec);
+    didMutate(changed ? PropertyChanged : NoChanges);
+    if (changed)
+        mutationScope.enqueueMutationRecord();
+}
+
+bool PropertySetCSSStyleDeclaration::removeVariable(const AtomicString& name)
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    StyleAttributeMutationScope mutationScope(this);
+    willMutate();
+    bool changed = m_propertySet->removeVariable(name);
+    didMutate(changed ? PropertyChanged : NoChanges);
+    if (changed)
+        mutationScope.enqueueMutationRecord();
+    return changed;
+}
+
+void PropertySetCSSStyleDeclaration::clearVariables(ExceptionCode&)
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    StyleAttributeMutationScope mutationScope(this);
+    willMutate();
+    bool changed = m_propertySet->clearVariables();
+    didMutate(changed ? PropertyChanged : NoChanges);
+    if (changed)
+        mutationScope.enqueueMutationRecord();
+}
+
 CSSValue* PropertySetCSSStyleDeclaration::cloneAndCacheForCSSOM(CSSValue* internalValue)
 {
     if (!internalValue)
         return 0;
 
     // The map is here to maintain the object identity of the CSSValues over multiple invocations.
     // FIXME: It is likely that the identity is not important for web compatibility and this code should be removed.
     if (!m_cssomCSSValueClones)
         m_cssomCSSValueClones = adoptPtr(new HashMap<CSSValue*, RefPtr<CSSValue> >);
     
@@ skipping 101 matching lines @@
     m_parentElement->invalidateStyleAttribute();
     StyleAttributeMutationScope(this).didInvalidateStyleAttr();
 }
 
 CSSStyleSheet* InlineCSSStyleDeclaration::parentStyleSheet() const
 {
     return m_parentElement ? m_parentElement->document()->elementSheet() : 0;
 }
 
 } // namespace WebCore