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 "core/css/CSSFontFaceSource.h"
30#include "core/css/CSSSegmentedFontFace.h"
31#include "core/css/FontFace.h"
32#include "wtf/Deque.h"
33#include "wtf/Forward.h"
34#include "wtf/PassRefPtr.h"
35#include "wtf/Vector.h"
36
37namespace WebCore {
38
39class CSSFontSelector;
40class Document;
41class FontDescription;
42class RemoteFontFaceSource;
43class SimpleFontData;
44class StyleRuleFontFace;
45
46class CSSFontFace FINAL : public NoBaseWillBeGarbageCollectedFinalized<CSSFontFace> {
47public:
48    struct UnicodeRange;
49    class UnicodeRangeSet;
50
51    CSSFontFace(FontFace* fontFace, Vector<UnicodeRange>& ranges)
52        : m_ranges(ranges)
53        , m_segmentedFontFace(nullptr)
54        , m_fontFace(fontFace)
55    {
56        ASSERT(m_fontFace);
57    }
58
59    FontFace* fontFace() const { return m_fontFace; }
60
61    UnicodeRangeSet& ranges() { return m_ranges; }
62
63    void setSegmentedFontFace(CSSSegmentedFontFace*);
64    void clearSegmentedFontFace() { m_segmentedFontFace = nullptr; }
65
66    bool isValid() const { return !m_sources.isEmpty(); }
67
68    void addSource(PassOwnPtrWillBeRawPtr<CSSFontFaceSource>);
69
70    void didBeginLoad();
71    void fontLoaded(RemoteFontFaceSource*);
72    void fontLoadWaitLimitExceeded(RemoteFontFaceSource*);
73
74    PassRefPtr<SimpleFontData> getFontData(const FontDescription&);
75
76    struct UnicodeRange {
77        UnicodeRange(UChar32 from, UChar32 to)
78            : m_from(from)
79            , m_to(to)
80        {
81        }
82
83        UChar32 from() const { return m_from; }
84        UChar32 to() const { return m_to; }
85        bool contains(UChar32 c) const { return m_from <= c && c <= m_to; }
86        bool operator<(const UnicodeRange& other) const { return m_from < other.m_from; }
87        bool operator<(UChar32 c) const { return m_to < c; }
88
89    private:
90        UChar32 m_from;
91        UChar32 m_to;
92    };
93
94    class UnicodeRangeSet {
95    public:
96        explicit UnicodeRangeSet(const Vector<UnicodeRange>&);
97        bool contains(UChar32) const;
98        bool intersectsWith(const String&) const;
99        bool isEntireRange() const { return m_ranges.isEmpty(); }
100        size_t size() const { return m_ranges.size(); }
101        const UnicodeRange& rangeAt(size_t i) const { return m_ranges[i]; }
102    private:
103        Vector<UnicodeRange> m_ranges; // If empty, represents the whole code space.
104    };
105
106    FontFace::LoadStatus loadStatus() const { return m_fontFace->loadStatus(); }
107    bool maybeScheduleFontLoad(const FontDescription&, UChar32);
108    void load();
109    void load(const FontDescription&);
110
111    bool hadBlankText() { return isValid() && m_sources.first()->hadBlankText(); }
112
113    void trace(Visitor*);
114
115private:
116    void setLoadStatus(FontFace::LoadStatus);
117
118    UnicodeRangeSet m_ranges;
119    RawPtrWillBeMember<CSSSegmentedFontFace> m_segmentedFontFace;
120    WillBeHeapDeque<OwnPtrWillBeMember<CSSFontFaceSource> > m_sources;
121    RawPtrWillBeMember<FontFace> m_fontFace;
122};
123
124}
125
126#endif
127