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

Source/core/rendering/style/RenderStyle.h

Index: Source/core/rendering/style/RenderStyle.h
diff --git a/Source/core/rendering/style/RenderStyle.h b/Source/core/rendering/style/RenderStyle.h
index e922533fa407b05f926deb7d531b9171008a11b1..52005ba7bda48f39c660cb56c85daea15e57d5a7 100644
--- a/Source/core/rendering/style/RenderStyle.h
+++ b/Source/core/rendering/style/RenderStyle.h
@@ -4,6 +4,7 @@
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
+ * 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
@@ -892,6 +893,7 @@ public:
 
     unsigned tabSize() const { return rareInheritedData->m_tabSize; }
 
+    StyleNavigationData* navigation() const { return rareNonInheritedData->m_navigation.get(); }
     // End CSS3 Getters
 
     WrapFlow wrapFlow() const { return static_cast<WrapFlow>(rareNonInheritedData->m_wrapFlow); }
@@ -1343,6 +1345,8 @@ public:
 
     void setTabSize(unsigned size) { SET_VAR(rareInheritedData, m_tabSize, size); }
 
+    void setNavigation(const StyleNavigationData&);

[fs, 2014/04/14 12:32:01]

I think it might end up easier to just have one setter for each property and
then use SET_VAR_WITH_SETTER and handle the potential NULL value in the
getter/setter on StyleRareNonInheritedData (this is related to the comment in
CSSProperties.in.)

[Krzysztof Olczyk, 2014/04/17 13:48:40]

Done.

+    void setNavigation(StyleNavigationData::NavigationDirection, const StyleNavigationValue&, bool add);
     // End CSS3 Setters
 
     void setWrapFlow(WrapFlow wrapFlow) { SET_VAR(rareNonInheritedData, m_wrapFlow, wrapFlow); }
@@ -1688,6 +1692,8 @@ public:
 
     static QuotesData* initialQuotes() { return 0; }
 
+    static StyleNavigationValue initialStyleNavigation() { DEFINE_STATIC_LOCAL(StyleNavigationValue, initial_navigation, ()); return initial_navigation; }

[fs, 2014/04/14 12:32:01]

initial_navigation -> initialNavigation

[Krzysztof Olczyk, 2014/04/17 13:48:40]

Done.

+
     // Keep these at the end.
     // FIXME: Why? Seems these should all be one big sorted list.
     static LineClampValue initialLineClamp() { return LineClampValue(); }