Make SpaceSplitStringData private and rename to Data

Source/core/dom/SpaceSplitString.h

 /*
  * Copyright (C) 2007, 2008, 2010, 2011, 2012 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  * Boston, MA 02111-1307, USA.
  *
  */
 
 #ifndef SpaceSplitString_h
 #define SpaceSplitString_h
 
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 #include "wtf/text/AtomicString.h"
 
 namespace blink {
 
-    class SpaceSplitStringData : public RefCounted<SpaceSplitStringData> {
+class SpaceSplitString {
+public:
+    SpaceSplitString() { }
+    SpaceSplitString(const AtomicString& string, bool shouldFoldCase) { set(string, shouldFoldCase); }
+
+    bool operator!=(const SpaceSplitString& other) const { return m_data != other.m_data; }
+
+    void set(const AtomicString&, bool shouldFoldCase);
+    void clear() { m_data.clear(); }
+
+    bool contains(const AtomicString& string) const { return m_data && m_data->contains(string); }
+    bool containsAll(const SpaceSplitString& names) const { return !names.m_data || (m_data && m_data->containsAll(*names.m_data)); }
+    void add(const AtomicString&);
+    bool remove(const AtomicString&);
+
+    size_t size() const { return m_data ? m_data->size() : 0; }
+    bool isNull() const { return !m_data; }
+    const AtomicString& operator[](size_t i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < size()); return (*m_data)[i]; }
+
+private:
+    class Data : public RefCounted<Data> {
     public:
-        static PassRefPtr<SpaceSplitStringData> create(const AtomicString&);
-        static PassRefPtr<SpaceSplitStringData> createUnique(const SpaceSplitStringData&);
+        static PassRefPtr<Data> create(const AtomicString&);
+        static PassRefPtr<Data> createUnique(const Data&);
 
-        ~SpaceSplitStringData();
+        ~Data();
 
         bool contains(const AtomicString& string)
         {
             size_t size = m_vector.size();
             for (size_t i = 0; i < size; ++i) {
                 if (m_vector[i] == string)
                     return true;
             }
             return false;
         }
 
-        bool containsAll(SpaceSplitStringData&);
+        bool containsAll(Data&);
 
         void add(const AtomicString&);
         void remove(unsigned index);
 
         bool isUnique() const { return m_keyString.isNull(); }
         size_t size() const { return m_vector.size(); }
         const AtomicString& operator[](size_t i) { ASSERT_WITH_SECURITY_IMPLICATION(i < size()); return m_vector[i]; }
 
     private:
-        explicit SpaceSplitStringData(const AtomicString&);
-        explicit SpaceSplitStringData(const SpaceSplitStringData&);
+        explicit Data(const AtomicString&);
+        explicit Data(const Data&);
 
         void createVector(const String&);
         template <typename CharacterType>
         inline void createVector(const CharacterType*, unsigned);
 
         AtomicString m_keyString;
         Vector<AtomicString, 4> m_vector;
     };
+    typedef HashMap<AtomicString, Data*> DataMap;
 
-    class SpaceSplitString {
-    public:
-        SpaceSplitString() { }
-        SpaceSplitString(const AtomicString& string, bool shouldFoldCase) { set(string, shouldFoldCase); }
+    static DataMap& sharedDataMap();
 
-        bool operator!=(const SpaceSplitString& other) const { return m_data != other.m_data; }
+    void ensureUnique()
+    {
+        if (m_data && !m_data->isUnique())
+            m_data = Data::createUnique(*m_data);
+    }
 
-        void set(const AtomicString&, bool shouldFoldCase);
-        void clear() { m_data.clear(); }
-
-        bool contains(const AtomicString& string) const { return m_data && m_data->contains(string); }
-        bool containsAll(const SpaceSplitString& names) const { return !names.m_data || (m_data && m_data->containsAll(*names.m_data)); }
-        void add(const AtomicString&);
-        bool remove(const AtomicString&);
-
-        size_t size() const { return m_data ? m_data->size() : 0; }
-        bool isNull() const { return !m_data; }
-        const AtomicString& operator[](size_t i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < size()); return (*m_data)[i]; }
-
-    private:
-        void ensureUnique()
-        {
-            if (m_data && !m_data->isUnique())
-                m_data = SpaceSplitStringData::createUnique(*m_data);
-        }
-
-        RefPtr<SpaceSplitStringData> m_data;
-    };
+    RefPtr<Data> m_data;
+};
 
 } // namespace blink
 
 #endif // SpaceSplitString_h