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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 "FontTraitsMask.h"
30 #include <wtf/HashSet.h>
31 #include <wtf/PassRefPtr.h>
32 #include <wtf/RefCounted.h>
33 #include <wtf/Vector.h>
34 #include <wtf/unicode/Unicode.h>
35 
36 namespace WebCore {
37 
38 class CSSFontFaceSource;
39 class CSSSegmentedFontFace;
40 class FontDescription;
41 class SimpleFontData;
42 
43 class CSSFontFace : public RefCounted<CSSFontFace> {
44 public:
45     static PassRefPtr<CSSFontFace> create(FontTraitsMask traitsMask, bool isLocalFallback = false) { return adoptRef(new CSSFontFace(traitsMask, isLocalFallback)); }
46     ~CSSFontFace();
47 
traitsMask()48     FontTraitsMask traitsMask() const { return m_traitsMask; }
49 
50     struct UnicodeRange;
51 
addRange(UChar32 from,UChar32 to)52     void addRange(UChar32 from, UChar32 to) { m_ranges.append(UnicodeRange(from, to)); }
ranges()53     const Vector<UnicodeRange>& ranges() const { return m_ranges; }
54 
55     void addedToSegmentedFontFace(CSSSegmentedFontFace*);
56     void removedFromSegmentedFontFace(CSSSegmentedFontFace*);
57 
58     bool isLoaded() const;
59     bool isValid() const;
60 
isLocalFallback()61     bool isLocalFallback() const { return m_isLocalFallback; }
62 
63     void addSource(CSSFontFaceSource*);
64 
65     void fontLoaded(CSSFontFaceSource*);
66     void retireCustomFont(SimpleFontData*);
67 
68     SimpleFontData* getFontData(const FontDescription&, bool syntheticBold, bool syntheticItalic);
69 
70     struct UnicodeRange {
UnicodeRangeUnicodeRange71         UnicodeRange(UChar32 from, UChar32 to)
72             : m_from(from)
73             , m_to(to)
74         {
75         }
76 
fromUnicodeRange77         UChar32 from() const { return m_from; }
toUnicodeRange78         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 private:
CSSFontFace(FontTraitsMask traitsMask,bool isLocalFallback)90     CSSFontFace(FontTraitsMask traitsMask, bool isLocalFallback)
91         : m_traitsMask(traitsMask)
92         , m_activeSource(0)
93         , m_isLocalFallback(isLocalFallback)
94     {
95     }
96 
97     FontTraitsMask m_traitsMask;
98     Vector<UnicodeRange> m_ranges;
99     HashSet<CSSSegmentedFontFace*> m_segmentedFontFaces;
100     Vector<CSSFontFaceSource*> m_sources;
101     CSSFontFaceSource* m_activeSource;
102     bool m_isLocalFallback;
103 };
104 
105 }
106 
107 #endif
108