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

Source/core/css/CSSComputedStyleDeclaration.cpp

Index: Source/core/css/CSSComputedStyleDeclaration.cpp
diff --git a/Source/core/css/CSSComputedStyleDeclaration.cpp b/Source/core/css/CSSComputedStyleDeclaration.cpp
index ee703d108e29d60f646e6deb6f933e59a52cb1b5..c1d62e4721f4e252afc50ca47f4d9f57f1e119fb 100644
--- a/Source/core/css/CSSComputedStyleDeclaration.cpp
+++ b/Source/core/css/CSSComputedStyleDeclaration.cpp
@@ -4,6 +4,7 @@
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007 Nicholas Shanks <webkit@nickshanks.com>
  * Copyright (C) 2011 Sencha, Inc. 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 Lesser General Public
@@ -146,6 +147,10 @@ static const CSSPropertyID staticComputableProperties[] = {
     CSSPropertyMaxWidth,
     CSSPropertyMinHeight,
     CSSPropertyMinWidth,
+    CSSPropertyNavDown,
+    CSSPropertyNavLeft,
+    CSSPropertyNavRight,
+    CSSPropertyNavUp,
     CSSPropertyMixBlendMode,
     CSSPropertyOpacity,
     CSSPropertyOrphans,
@@ -1421,6 +1426,15 @@ static PassRefPtr<CSSValue> counterToCSSValue(const RenderStyle* style, CSSPrope
     return list.release();
 }
 
+static PassRefPtr<CSSValue> navDirectionToCSSValue(const StyleNavigationValue& navValue)
+{
+    RefPtr<CSSValueList> list = CSSValueList::createSpaceSeparated();
+    list->append(cssValuePool().createValue(navValue.id().string(), CSSPrimitiveValue::CSS_STRING));
+    list->append(cssValuePool().createValue(navValue.target().string(), CSSPrimitiveValue::CSS_STRING));
+
+    return list.release();
+}
+
 static void logUnimplementedPropertyID(CSSPropertyID propertyID)
 {
     DEFINE_STATIC_LOCAL(HashSet<CSSPropertyID>, propertyIDSet, ());
@@ -2064,6 +2078,14 @@ PassRefPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValue(CSSPropert
                 return zoomAdjustedPixelValueForLength(marginLeft, style.get());
             return zoomAdjustedPixelValue(toRenderBox(renderer)->marginLeft(), style.get());
         }
+        case CSSPropertyNavDown:
+            return navDirectionToCSSValue(style->navDown());
+        case CSSPropertyNavLeft:
+            return navDirectionToCSSValue(style->navLeft());
+        case CSSPropertyNavRight:
+            return navDirectionToCSSValue(style->navRight());
+        case CSSPropertyNavUp:
+            return navDirectionToCSSValue(style->navUp());
         case CSSPropertyWebkitMarqueeDirection:
             return cssValuePool().createValue(style->marqueeDirection());
         case CSSPropertyWebkitMarqueeIncrement: