WebCore/SegmentedFontData.h

   1 /*
   2  * Copyright (C) 2008, 2009 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
  14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
  17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #ifndef SegmentedFontData_h
  27 #define SegmentedFontData_h
  28
  29 #include "FontData.h"
  30 #include <wtf/Vector.h>
  31
  32 namespace WebCore {
  33
  34 class SimpleFontData;
  35
  36 struct FontDataRange {
  37     FontDataRange(UChar32 from, UChar32 to, const SimpleFontData* fontData)
  38         : m_from(from)
  39         , m_to(to)
  40         , m_fontData(fontData)
  41     {
  42     }
  43
  44     UChar32 from() const { return m_from; }
  45     UChar32 to() const { return m_to; }
  46     const SimpleFontData* fontData() const { return m_fontData; }
  47
  48 private:
  49     UChar32 m_from;
  50     UChar32 m_to;
  51     const SimpleFontData* m_fontData;
  52 };
  53
  54 class SegmentedFontData : public FontData {
  55 public:
  56     virtual ~SegmentedFontData();
  57
  58     void appendRange(const FontDataRange& range) { m_ranges.append(range); }
  59     unsigned numRanges() const { return m_ranges.size(); }
  60     const FontDataRange& rangeAt(unsigned i) const { return m_ranges[i]; }
  61
  62 private:
  63     virtual const SimpleFontData* fontDataForCharacter(UChar32) const;
  64     virtual bool containsCharacters(const UChar*, int length) const;
  65
  66     virtual bool isCustomFont() const;
  67     virtual bool isLoading() const;
  68     virtual bool isSegmented() const;
  69
  70     bool containsCharacter(UChar32) const;
  71
  72     Vector<FontDataRange, 1> m_ranges;
  73 };
  74
  75 } // namespace WebCore
  76
  77 #endif // SegmentedFontData_h