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 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 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 <unicode/utypes.h>
30#include <wtf/FastMalloc.h>
31#include <wtf/Forward.h>
32#include <wtf/Noncopyable.h>
33#include <wtf/PassRefPtr.h>
34#include <wtf/RefCounted.h>
35
36namespace WebCore {
37
38class SimpleFontData;
39
40class FontData : public RefCounted<FontData> {
41    WTF_MAKE_NONCOPYABLE(FontData); WTF_MAKE_FAST_ALLOCATED;
42public:
43    FontData()
44        : m_maxGlyphPageTreeLevel(0)
45    {
46    }
47
48    virtual ~FontData();
49
50    virtual const SimpleFontData* fontDataForCharacter(UChar32) const = 0;
51    virtual bool containsCharacters(const UChar*, int length) const = 0;
52    virtual bool isCustomFont() const = 0;
53    virtual bool isLoading() const = 0;
54    virtual bool isSegmented() const = 0;
55
56    void setMaxGlyphPageTreeLevel(unsigned level) const { m_maxGlyphPageTreeLevel = level; }
57    unsigned maxGlyphPageTreeLevel() const { return m_maxGlyphPageTreeLevel; }
58
59#ifndef NDEBUG
60    virtual String description() const = 0;
61#endif
62
63private:
64    mutable unsigned m_maxGlyphPageTreeLevel;
65};
66
67} // namespace WebCore
68
69#endif // FontData_h
70