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      1 /*
      2  * Copyright (C) 2007, 2008, 2010, 2011, 2012 Apple Inc. All rights reserved.
      3  *
      4  * This library is free software; you can redistribute it and/or
      5  * modify it under the terms of the GNU Library General Public
      6  * License as published by the Free Software Foundation; either
      7  * version 2 of the License, or (at your option) any later version.
      8  *
      9  * This library is distributed in the hope that it will be useful,
     10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     12  * Library General Public License for more details.
     13  *
     14  * You should have received a copy of the GNU Library General Public License
     15  * along with this library; see the file COPYING.LIB.  If not, write to
     16  * the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
     17  * Boston, MA 02111-1307, USA.
     18  *
     19  */
     20 
     21 #ifndef SpaceSplitString_h
     22 #define SpaceSplitString_h
     23 
     24 #include "wtf/RefCounted.h"
     25 #include "wtf/Vector.h"
     26 #include "wtf/text/AtomicString.h"
     27 
     28 namespace WebCore {
     29 
     30     class SpaceSplitStringData : public RefCounted<SpaceSplitStringData> {
     31     public:
     32         static PassRefPtr<SpaceSplitStringData> create(const AtomicString&);
     33         static PassRefPtr<SpaceSplitStringData> createUnique(const SpaceSplitStringData&);
     34 
     35         ~SpaceSplitStringData();
     36 
     37         bool contains(const AtomicString& string)
     38         {
     39             size_t size = m_vector.size();
     40             for (size_t i = 0; i < size; ++i) {
     41                 if (m_vector[i] == string)
     42                     return true;
     43             }
     44             return false;
     45         }
     46 
     47         bool containsAll(SpaceSplitStringData&);
     48 
     49         void add(const AtomicString&);
     50         void remove(unsigned index);
     51 
     52         bool isUnique() const { return m_keyString.isNull(); }
     53         size_t size() const { return m_vector.size(); }
     54         const AtomicString& operator[](size_t i) { ASSERT_WITH_SECURITY_IMPLICATION(i < size()); return m_vector[i]; }
     55 
     56     private:
     57         explicit SpaceSplitStringData(const AtomicString&);
     58         explicit SpaceSplitStringData(const SpaceSplitStringData&);
     59 
     60         void createVector(const String&);
     61         template <typename CharacterType>
     62         inline void createVector(const CharacterType*, unsigned);
     63 
     64         AtomicString m_keyString;
     65         Vector<AtomicString, 4> m_vector;
     66     };
     67 
     68     class SpaceSplitString {
     69     public:
     70         SpaceSplitString() { }
     71         SpaceSplitString(const AtomicString& string, bool shouldFoldCase) { set(string, shouldFoldCase); }
     72 
     73         bool operator!=(const SpaceSplitString& other) const { return m_data != other.m_data; }
     74 
     75         void set(const AtomicString&, bool shouldFoldCase);
     76         void clear() { m_data.clear(); }
     77 
     78         bool contains(const AtomicString& string) const { return m_data && m_data->contains(string); }
     79         bool containsAll(const SpaceSplitString& names) const { return !names.m_data || (m_data && m_data->containsAll(*names.m_data)); }
     80         void add(const AtomicString&);
     81         bool remove(const AtomicString&);
     82 
     83         size_t size() const { return m_data ? m_data->size() : 0; }
     84         bool isNull() const { return !m_data; }
     85         const AtomicString& operator[](size_t i) const { ASSERT_WITH_SECURITY_IMPLICATION(i < size()); return (*m_data)[i]; }
     86 
     87     private:
     88         void ensureUnique()
     89         {
     90             if (m_data && !m_data->isUnique())
     91                 m_data = SpaceSplitStringData::createUnique(*m_data);
     92         }
     93 
     94         RefPtr<SpaceSplitStringData> m_data;
     95     };
     96 
     97 } // namespace WebCore
     98 
     99 #endif // SpaceSplitString_h
    100