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 
67     SimpleFontData* getFontData(const FontDescription&, bool syntheticBold, bool syntheticItalic);
68 
69     struct UnicodeRange {
UnicodeRangeUnicodeRange70         UnicodeRange(UChar32 from, UChar32 to)
71             : m_from(from)
72             , m_to(to)
73         {
74         }
75 
fromUnicodeRange76         UChar32 from() const { return m_from; }
toUnicodeRange77         UChar32 to() const { return m_to; }
78 
79     private:
80         UChar32 m_from;
81         UChar32 m_to;
82     };
83 
84 #if ENABLE(SVG_FONTS)
85     bool hasSVGFontFaceSource() const;
86 #endif
87 
88 private:
CSSFontFace(FontTraitsMask traitsMask,bool isLocalFallback)89     CSSFontFace(FontTraitsMask traitsMask, bool isLocalFallback)
90         : m_traitsMask(traitsMask)
91         , m_activeSource(0)
92         , m_isLocalFallback(isLocalFallback)
93     {
94     }
95 
96     FontTraitsMask m_traitsMask;
97     Vector<UnicodeRange> m_ranges;
98     HashSet<CSSSegmentedFontFace*> m_segmentedFontFaces;
99     Vector<CSSFontFaceSource*> m_sources;
100     CSSFontFaceSource* m_activeSource;
101     bool m_isLocalFallback;
102 };
103 
104 }
105 
106 #endif
107