1/*
2 * Copyright (C) 2007, 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 CSSFontFace_h
27#define CSSFontFace_h
28
29#include "CSSFontFaceRule.h"
30#include "CSSFontFaceSource.h"
31#include "FontTraitsMask.h"
32#include <wtf/Forward.h>
33#include <wtf/HashSet.h>
34#include <wtf/PassRefPtr.h>
35#include <wtf/RefCounted.h>
36#include <wtf/Vector.h>
37#include <wtf/unicode/Unicode.h>
38
39namespace WebCore {
40
41class CSSSegmentedFontFace;
42class FontDescription;
43class SimpleFontData;
44
45class CSSFontFace : public RefCounted<CSSFontFace> {
46public:
47    static PassRefPtr<CSSFontFace> create(FontTraitsMask traitsMask, PassRefPtr<CSSFontFaceRule> rule, bool isLocalFallback = false) { return adoptRef(new CSSFontFace(traitsMask, rule, isLocalFallback)); }
48
49    FontTraitsMask traitsMask() const { return m_traitsMask; }
50
51    struct UnicodeRange;
52
53    void addRange(UChar32 from, UChar32 to) { m_ranges.append(UnicodeRange(from, to)); }
54    const Vector<UnicodeRange>& ranges() const { return m_ranges; }
55
56    void addedToSegmentedFontFace(CSSSegmentedFontFace*);
57    void removedFromSegmentedFontFace(CSSSegmentedFontFace*);
58
59    bool isLoaded() const;
60    bool isValid() const;
61
62    bool isLocalFallback() const { return m_isLocalFallback; }
63
64    void addSource(PassOwnPtr<CSSFontFaceSource>);
65
66    void fontLoaded(CSSFontFaceSource*);
67
68    PassRefPtr<SimpleFontData> getFontData(const FontDescription&, bool syntheticBold, bool syntheticItalic);
69
70    struct UnicodeRange {
71        UnicodeRange(UChar32 from, UChar32 to)
72            : m_from(from)
73            , m_to(to)
74        {
75        }
76
77        UChar32 from() const { return m_from; }
78        UChar32 to() const { return m_to; }
79
80    private:
81        UChar32 m_from;
82        UChar32 m_to;
83    };
84
85#if ENABLE(SVG_FONTS)
86    bool hasSVGFontFaceSource() const;
87#endif
88
89#if ENABLE(FONT_LOAD_EVENTS)
90    enum LoadState { NotLoaded, Loading, Loaded, Error };
91    LoadState loadState() const { return m_loadState; }
92#endif
93
94private:
95    CSSFontFace(FontTraitsMask traitsMask, PassRefPtr<CSSFontFaceRule> rule, bool isLocalFallback)
96        : m_traitsMask(traitsMask)
97        , m_activeSource(0)
98        , m_isLocalFallback(isLocalFallback)
99#if ENABLE(FONT_LOAD_EVENTS)
100        , m_loadState(isLocalFallback ? Loaded : NotLoaded)
101        , m_rule(rule)
102#endif
103    {
104        UNUSED_PARAM(rule);
105    }
106
107    FontTraitsMask m_traitsMask;
108    Vector<UnicodeRange> m_ranges;
109    HashSet<CSSSegmentedFontFace*> m_segmentedFontFaces;
110    Vector<OwnPtr<CSSFontFaceSource> > m_sources;
111    CSSFontFaceSource* m_activeSource;
112    bool m_isLocalFallback;
113#if ENABLE(FONT_LOAD_EVENTS)
114    LoadState m_loadState;
115    RefPtr<CSSFontFaceRule> m_rule;
116    void notifyFontLoader(LoadState);
117    void notifyLoadingDone();
118#endif
119};
120
121}
122
123#endif
124