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 182e7eef70833261cced751674f735f167dc3214..c0156c11f69ab6ad4dc826a84bdae854f62a6016 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) 2014 Opera Software ASA. All rights reserved.

[Timothy Loh, 2014/10/01 13:14:53]

I haven't seen these headers changed in a long time, maybe worthwhile to check
with other Opera employees if you haven't already.

[rune, 2014/10/01 13:40:49]

We shouldn't change it. Add the generic Chromium copyright/license reference in
new files and leave old ones unchanged.

  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Lesser General Public
@@ -152,6 +153,10 @@ static const CSSPropertyID staticComputableProperties[] = {
     CSSPropertyMaxWidth,
     CSSPropertyMinHeight,
     CSSPropertyMinWidth,
+    CSSPropertyNavDown,
+    CSSPropertyNavLeft,
+    CSSPropertyNavRight,
+    CSSPropertyNavUp,
     CSSPropertyMixBlendMode,
     CSSPropertyObjectFit,
     CSSPropertyObjectPosition,
@@ -1376,6 +1381,50 @@ static PassRefPtrWillBeRawPtr<CSSValue> valueForCounterDirectives(const RenderSt
     return list.release();
 }
 
+static PassRefPtrWillBeRawPtr<CSSValue> valueForNavigationDirection(const RenderStyle& style, CSSPropertyID propertyID)
+{
+    StyleNavigationValue navValue;
+
+    switch (propertyID) {
+    case CSSPropertyNavUp:
+        navValue = style.navUp();
+        break;
+    case CSSPropertyNavDown:
+        navValue = style.navDown();
+        break;
+    case CSSPropertyNavLeft:
+        navValue = style.navLeft();
+        break;
+    case CSSPropertyNavRight:
+        navValue = style.navRight();
+        break;
+    default:
+        ASSERT_NOT_REACHED();
+        break;
+    }
+
+    if (navValue.isAuto())
+        return cssValuePool().createIdentifierValue(CSSValueAuto);
+
+    String selectorText = "#";
+    selectorText.append(navValue.id());
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> idSel = cssValuePool().createValue(selectorText, CSSPrimitiveValue::CSS_STRING);
+    RefPtrWillBeRawPtr<CSSPrimitiveValue> target;
+    if (navValue.navigationTarget() == TargetName)
+        target = cssValuePool().createValue(navValue.targetName(), CSSPrimitiveValue::CSS_STRING);
+    else if (navValue.navigationTarget() == Root)
+        target = cssValuePool().createValue(CSSValueRoot);
+    else if (navValue.navigationTarget() == Current)
+        target = cssValuePool().createValue(CSSValueCurrent);
+    else
+        ASSERT_NOT_REACHED();
+
+    RefPtrWillBeRawPtr<CSSValueList> value = CSSValueList::createSpaceSeparated();
+    value->append(idSel);
+    value->append(target);
+    return value;
+}
+
 static void logUnimplementedPropertyID(CSSPropertyID propertyID)
 {
     DEFINE_STATIC_LOCAL(HashSet<CSSPropertyID>, propertyIDSet, ());
@@ -2059,6 +2108,11 @@ PassRefPtrWillBeRawPtr<CSSValue> CSSComputedStyleDeclaration::getPropertyCSSValu
                 return zoomAdjustedPixelValueForLength(marginLeft, *style);
             return zoomAdjustedPixelValue(toRenderBox(renderer)->marginLeft(), *style);
         }
+        case CSSPropertyNavDown:
+        case CSSPropertyNavLeft:
+        case CSSPropertyNavRight:
+        case CSSPropertyNavUp:
+            return valueForNavigationDirection(*style, propertyID);
         case CSSPropertyWebkitUserModify:
             return cssValuePool().createValue(style->userModify());
         case CSSPropertyMaxHeight: {