Recognize html whitespaces as separators for attribute selectors.

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 28 matching lines @@
 #include "core/dom/Text.h"
 #include "core/dom/shadow/InsertionPoint.h"
 #include "core/dom/shadow/ShadowRoot.h"
 #include "core/editing/FrameSelection.h"
 #include "core/html/HTMLDocument.h"
 #include "core/html/HTMLFrameElementBase.h"
 #include "core/html/HTMLInputElement.h"
 #include "core/html/HTMLOptionElement.h"
 #include "core/html/HTMLProgressElement.h"
 #include "core/html/HTMLStyleElement.h"
+#include "core/html/parser/HTMLParserIdioms.h"
 #include "core/inspector/InspectorInstrumentation.h"
 #include "core/page/FocusController.h"
 #include "core/page/Frame.h"
 #include "core/page/Page.h"
 #include "core/platform/ScrollableArea.h"
 #include "core/platform/ScrollbarTheme.h"
 #include "core/rendering/RenderObject.h"
 #include "core/rendering/RenderScrollbar.h"
 #include "core/rendering/style/RenderStyle.h"
 
@@ skipping 170 matching lines @@
                 }
             }
             return SelectorFailsCompletely;
         }
     }
 
     ASSERT_NOT_REACHED();
     return SelectorFailsCompletely;
 }
 
+static inline bool containsHTMLSpace(const AtomicString& string)
+{
+    for (unsigned i = 0; i < string.length(); i++)
+        if (isHTMLSpace(string[i]))
+            return true;
+    return false;
+}
+
 static bool attributeValueMatches(const Attribute* attributeItem, CSSSelector::Match match, const AtomicString& selectorValue, bool caseSensitive)
 {
     const AtomicString& value = attributeItem->value();
     if (value.isNull())
         return false;
 
     switch (match) {
     case CSSSelector::Exact:
         if (caseSensitive ? selectorValue != value : !equalIgnoringCase(selectorValue, value))
             return false;
         break;
     case CSSSelector::List:
         {
-            // Ignore empty selectors or selectors containing spaces
-            if (selectorValue.contains(' ') || selectorValue.isEmpty())
+            // Ignore empty selectors or selectors containing HTML spaces
+            if (containsHTMLSpace(selectorValue) || selectorValue.isEmpty())
                 return false;
 
             unsigned startSearchAt = 0;
             while (true) {
                 size_t foundPos = value.find(selectorValue, startSearchAt, caseSensitive);
                 if (foundPos == notFound)
                     return false;
-                if (!foundPos || value[foundPos - 1] == ' ') {
+                if (!foundPos || isHTMLSpace(value[foundPos - 1])) {
                     unsigned endStr = foundPos + selectorValue.length();
-                    if (endStr == value.length() || value[endStr] == ' ')
+                    if (endStr == value.length() || isHTMLSpace(value[endStr]))
                         break; // We found a match.
                 }
 
                 // No match. Keep looking.
                 startSearchAt = foundPos + 1;
             }
             break;
         }
     case CSSSelector::Contain:
         if (!value.contains(selectorValue, caseSensitive) || selectorValue.isEmpty())
@@ skipping 621 matching lines @@
     return element->focused() && isFrameFocused(element);
 }
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const DOMSiblingTraversalStrategy&) const;
 
 template
 SelectorChecker::Match SelectorChecker::match(const SelectorCheckingContext&, PseudoId&, const ShadowDOMSiblingTraversalStrategy&) const;
 
 }