1/*
2 * Copyright (C) 2008 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 FontData_h
27#define FontData_h
28
29#include <wtf/FastAllocBase.h>
30#include <wtf/Forward.h>
31#include <wtf/Noncopyable.h>
32#include <wtf/unicode/Unicode.h>
33
34namespace WebCore {
35
36class SimpleFontData;
37
38class FontData {
39    WTF_MAKE_NONCOPYABLE(FontData); WTF_MAKE_FAST_ALLOCATED;
40public:
41    FontData()
42        : m_maxGlyphPageTreeLevel(0)
43    {
44    }
45
46    virtual ~FontData();
47
48    virtual const SimpleFontData* fontDataForCharacter(UChar32) const = 0;
49    virtual bool containsCharacters(const UChar*, int length) const = 0;
50    virtual bool isCustomFont() const = 0;
51    virtual bool isLoading() const = 0;
52    virtual bool isSegmented() const = 0;
53
54    void setMaxGlyphPageTreeLevel(unsigned level) const { m_maxGlyphPageTreeLevel = level; }
55    unsigned maxGlyphPageTreeLevel() const { return m_maxGlyphPageTreeLevel; }
56
57#ifndef NDEBUG
58    virtual String description() const = 0;
59#endif
60
61private:
62    mutable unsigned m_maxGlyphPageTreeLevel;
63};
64
65} // namespace WebCore
66
67#endif // FontData_h
68