[WIP] Implement :dir()

third_party/WebKit/Source/core/css/SelectorChecker.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
  * Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
  * Copyright (C) 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013 Apple Inc. All rights reserved.
  * Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
  * Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  * Copyright (c) 2011, Code Aurora Forum. All rights reserved.
  * Copyright (C) Research In Motion Limited 2011. All rights reserved.
@@ skipping 848 matching lines @@
                     return true;
             } else if (isHTMLOptionElement(element) && toHTMLOptionElement(element).selected()) {
                 return true;
             }
             break;
         }
     case CSSSelector::PseudoIndeterminate:
         return element.shouldAppearIndeterminate();
     case CSSSelector::PseudoRoot:
         return element == element.document().documentElement();
+    case CSSSelector::PseudoDir:
+        {
+            const AtomicString& argument = selector.argument();
+            if (element.directionality() == LTR)
+                return equalIgnoringASCIICase(argument, "ltr");
+            return equalIgnoringASCIICase(argument, "rtl");
+        }
     case CSSSelector::PseudoLang:
         {
             AtomicString value;
             if (element.isVTTElement())
                 value = toVTTElement(element).language();
             else
                 value = element.computeInheritedLanguage();
             const AtomicString& argument = selector.argument();
             if (value.isEmpty() || !value.startsWith(argument, TextCaseASCIIInsensitive))
                 break;
@@ skipping 256 matching lines @@
 }
 
 bool SelectorChecker::matchesFocusPseudoClass(const Element& element)
 {
     if (InspectorInstrumentation::forcePseudoState(const_cast<Element*>(&element), CSSSelector::PseudoFocus))
         return true;
     return element.focused() && isFrameFocused(element);
 }
 
 } // namespace blink