Use ASCII case-insensitive matching for attribute selectors

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 489 matching lines @@
 {
     // TODO(esprehn): How do we get here with a null value?
     const AtomicString& value = attributeItem.value();
     if (value.isNull())
         return false;
 
     switch (match) {
     case CSSSelector::AttributeExact:
         if (caseSensitivity == TextCaseSensitive)
             return selectorValue == value;
-        return equalIgnoringCase(selectorValue, value);
+        return equalIgnoringASCIICase(selectorValue, value);
     case CSSSelector::AttributeSet:
         return true;
     case CSSSelector::AttributeList:
         {
             // Ignore empty selectors or selectors containing HTML spaces
             if (selectorValue.isEmpty() || containsHTMLSpace(selectorValue))
                 return false;
 
             unsigned startSearchAt = 0;
             while (true) {
@@ skipping 43 matching lines @@
 static bool anyAttributeMatches(Element& element, CSSSelector::Match match, const CSSSelector& selector)
 {
     const QualifiedName& selectorAttr = selector.attribute();
     ASSERT(selectorAttr.localName() != starAtom); // Should not be possible from the CSS grammar.
 
     // Synchronize the attribute in case it is lazy-computed.
     // Currently all lazy properties have a null namespace, so only pass localName().
     element.synchronizeAttribute(selectorAttr.localName());
 
     const AtomicString& selectorValue = selector.value();
-    TextCaseSensitivity caseSensitivity = (selector.attributeMatchType() == CSSSelector::CaseInsensitive) ? TextCaseInsensitive : TextCaseSensitive;
+    TextCaseSensitivity caseSensitivity = (selector.attributeMatchType() == CSSSelector::CaseInsensitive) ? TextCaseASCIIInsensitive : TextCaseSensitive;
 
     AttributeCollection attributes = element.attributesWithoutUpdate();
     for (const auto& attributeItem: attributes) {
         if (!attributeItem.matches(selectorAttr))
             continue;
 
         if (attributeValueMatches(attributeItem, match, selectorValue, caseSensitivity))
             return true;
 
-        if (caseSensitivity == TextCaseInsensitive) {
+        if (caseSensitivity == TextCaseASCIIInsensitive) {
             if (selectorAttr.namespaceURI() != starAtom)
                 return false;
             continue;
         }
 
         // Legacy dictates that values of some attributes should be compared in
         // a case-insensitive manner regardless of whether the case insensitive
         // flag is set or not.
         bool legacyCaseInsensitive = element.document().isHTMLDocument() && !HTMLDocument::isCaseSensitiveAttribute(selectorAttr);
 
         // If case-insensitive, re-check, and count if result differs.
         // See http://code.google.com/p/chromium/issues/detail?id=327060
-        if (legacyCaseInsensitive && attributeValueMatches(attributeItem, match, selectorValue, TextCaseInsensitive)) {
+        if (legacyCaseInsensitive && attributeValueMatches(attributeItem, match, selectorValue, TextCaseASCIIInsensitive)) {
             UseCounter::count(element.document(), UseCounter::CaseInsensitiveAttrSelectorMatch);
             return true;
         }
         if (selectorAttr.namespaceURI() != starAtom)
             return false;
     }
 
     return false;
 }
 
@@ skipping 318 matching lines @@
     case CSSSelector::PseudoRoot:
         return element == element.document().documentElement();
     case CSSSelector::PseudoLang:
         {
             AtomicString value;
             if (element.isVTTElement())
                 value = toVTTElement(element).language();
             else
                 value = element.computeInheritedLanguage();
             const AtomicString& argument = selector.argument();
-            if (value.isEmpty() || !startsWithIgnoringASCIICase(value, argument))
+            if (value.isEmpty() || !value.startsWith(argument, TextCaseASCIIInsensitive))
                 break;
             if (value.length() != argument.length() && value[argument.length()] != '-')
                 break;
             return true;
         }
     case CSSSelector::PseudoFullScreen:
         // While a Document is in the fullscreen state, and the document's current fullscreen
         // element is an element in the document, the 'full-screen' pseudoclass applies to
         // that element. Also, an <iframe>, <object> or <embed> element whose child browsing
         // context's Document is in the fullscreen state has the 'full-screen' pseudoclass applied.
@@ skipping 244 matching lines @@
 }
 
 bool SelectorChecker::matchesFocusPseudoClass(const Element& element)
 {
     if (InspectorInstrumentation::forcePseudoState(const_cast<Element*>(&element), CSSSelector::PseudoFocus))
         return true;
     return element.focused() && isFrameFocused(element);
 }
 
 }