Add support for case-insensitive attribute value selectors

Source/core/css/CSSSelector.cpp

 /*
  * Copyright (C) 1999-2003 Lars Knoll (knoll@kde.org)
  *               1999 Waldo Bastian (bastian@kde.org)
  *               2001 Andreas Schlapbach (schlpbch@iam.unibe.ch)
  *               2001-2003 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2002, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 David Smith (catfish.man@gmail.com)
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
@@ skipping 663 matching lines @@
                     str.appendLiteral("$=");
                     break;
                 case CSSSelector::Contain:
                     str.appendLiteral("*=");
                     break;
                 default:
                     break;
             }
             if (cs->m_match != CSSSelector::Set) {
                 serializeString(cs->value(), str);
+                if (cs->attributeFlags() & CaseInsensitive)
+                    str.append(" i");
                 str.append(']');
             }
         }
         if (cs->relation() != CSSSelector::SubSelector || !cs->tagHistory())
             break;
         cs = cs->tagHistory();
     }
 
     if (const CSSSelector* tagHistory = cs->tagHistory()) {
         switch (cs->relation()) {
         case CSSSelector::Descendant:
             return tagHistory->selectorText(" " + str.toString() + rightSide);
         case CSSSelector::Child:
             return tagHistory->selectorText(" > " + str.toString() + rightSide);
         case CSSSelector::ShadowDeep:
             return tagHistory->selectorText(" /deep/ " + str.toString() + rightSide);
         case CSSSelector::DirectAdjacent:
             return tagHistory->selectorText(" + " + str.toString() + rightSide);
         case CSSSelector::IndirectAdjacent:
             return tagHistory->selectorText(" ~ " + str.toString() + rightSide);
         case CSSSelector::SubSelector:
             ASSERT_NOT_REACHED();
         case CSSSelector::ShadowPseudo:
             return tagHistory->selectorText(str.toString() + rightSide);
         }
     }
     return str.toString() + rightSide;
 }
 
-void CSSSelector::setAttribute(const QualifiedName& value)
+void CSSSelector::setAttribute(const QualifiedName& value, unsigned flags)
 {
     createRareData();
     m_data.m_rareData->m_attribute = value;
+    m_data.m_rareData->m_attributeFlags = flags;
 }
 
 void CSSSelector::setArgument(const AtomicString& value)
 {
     createRareData();
     m_data.m_rareData->m_argument = value;
 }
 
 void CSSSelector::setSelectorList(PassOwnPtr<CSSSelectorList> selectorList)
 {
@@ skipping 83 matching lines @@
 {
     ASSERT(m_hasRareData);
     return m_data.m_rareData->matchNth(count);
 }
 
 CSSSelector::RareData::RareData(const AtomicString& value)
     : m_value(value)
     , m_a(0)
     , m_b(0)
     , m_attribute(anyQName())
+    , m_attributeFlags(NoAttributeFlags)
     , m_argument(nullAtom)
 {
 }
 
 CSSSelector::RareData::~RareData()
 {
 }
 
 // a helper function for parsing nth-arguments
 bool CSSSelector::RareData::parseNth()
@@ skipping 48 matching lines @@
             return false;
         return (count - m_b) % m_a == 0;
     } else {
         if (count > m_b)
             return false;
         return (m_b - count) % (-m_a) == 0;
     }
 }
 
 } // namespace WebCore