CSS Custom Properties (Variables)

third_party/WebKit/Source/core/style/ComputedStyle.cpp

 /*
  * Copyright (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2011 Adobe Systems Incorporated. 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.
  *
@@ skipping 1251 matching lines @@
         return empty;
     }
     if (inherited_flags.m_textUnderline) {
         DEFINE_STATIC_LOCAL(Vector<AppliedTextDecoration>, underline, (1, AppliedTextDecoration(TextDecorationUnderline)));
         return underline;
     }
 
     return rareInheritedData->appliedTextDecorations->vector();
 }
 
+StyleVariableData* ComputedStyle::variables() const
+{
+    ASSERT(RuntimeEnabledFeatures::cssVariablesEnabled());
+    return rareInheritedData->variables.get();
+}
+
+void ComputedStyle::setVariable(const AtomicString& name, PassRefPtr<CSSVariableData> value)
+{
+    RefPtr<StyleVariableData>& variables = rareInheritedData.access()->variables;
+    if (!variables)
+        variables = StyleVariableData::create();
+    else if (!variables->hasOneRef())
+        variables = variables->copy();
+    variables->setVariable(name, value);
+}
+
+void ComputedStyle::removeVariable(const AtomicString& name)
+{
+    RefPtr<StyleVariableData>& variables = rareInheritedData.access()->variables;
+    if (!variables)
+        return;
+    if (!variables->hasOneRef())
+        variables = variables->copy();
+    variables->removeVariable(name);
+}
+
 float ComputedStyle::wordSpacing() const { return fontDescription().wordSpacing(); }
 float ComputedStyle::letterSpacing() const { return fontDescription().letterSpacing(); }
 
 bool ComputedStyle::setFontDescription(const FontDescription& v)
 {
     if (inherited->font.fontDescription() != v) {
         inherited.access()->font = Font(v);
         return true;
     }
     return false;
@@ skipping 509 matching lines @@
 }
 
 void ComputedStyle::copyChildDependentFlagsFrom(const ComputedStyle& other)
 {
     setEmptyState(other.emptyState());
     if (other.hasExplicitlyInheritedProperties())
         setHasExplicitlyInheritedProperties();
 }
 
 } // namespace blink