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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 
     48     FontTraitsMask traitsMask() const { return m_traitsMask; }
     49 
     50     struct UnicodeRange;
     51 
     52     void addRange(UChar32 from, UChar32 to) { m_ranges.append(UnicodeRange(from, to)); }
     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 
     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 {
     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 private:
     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