Implementation of CSS3 nav-up/down/left/right properties from CSS3 UI.

Source/core/rendering/style/RenderStyle.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.
+ * Copyright (C) 2013 Opera Software ASA. 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.
@@ skipping 770 matching lines @@
 void RenderStyle::setContent(QuoteType quote, bool add)
 {
     if (add) {
         appendContent(ContentData::create(quote));
         return;
     }
 
     rareNonInheritedData.access()->m_content = ContentData::create(quote);
 }
 
+void RenderStyle::setNavigation(const StyleNavigationData& data)
+{
+    rareNonInheritedData.access()->m_navigation = adoptPtr(new StyleNavigationData(data));
+}
+
+void RenderStyle::setNavigation(StyleNavigationData::NavigationDirection direction, const StyleNavigationValue& value, bool add)
+{
+    if (add && rareNonInheritedData->m_navigation) {
+        rareNonInheritedData.access()->m_navigation->SetProperty(direction, value);
+        return;
+    }
+
+    StyleNavigationData data(direction, value);
+    setNavigation(data);
+}
+
 blink::WebBlendMode RenderStyle::blendMode() const
 {
     if (RuntimeEnabledFeatures::cssCompositingEnabled())
         return static_cast<blink::WebBlendMode>(rareNonInheritedData->m_effectiveBlendMode);
     return blink::WebBlendModeNormal;
 }
 
 void RenderStyle::setBlendMode(blink::WebBlendMode v)
 {
     if (RuntimeEnabledFeatures::cssCompositingEnabled())
@@ skipping 849 matching lines @@
     // right
     radiiSum = radii.topRight().height() + radii.bottomRight().height();
     if (radiiSum > rect.height())
         factor = std::min(rect.height() / radiiSum, factor);
 
     ASSERT(factor <= 1);
     return factor;
 }
 
 } // namespace WebCore