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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 "core/css/CSSFontFaceRule.h"
     30 #include "core/css/CSSFontFaceSource.h"
     31 #include "core/platform/graphics/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 
     38 namespace WebCore {
     39 
     40 class CSSSegmentedFontFace;
     41 class FontDescription;
     42 class SimpleFontData;
     43 
     44 class CSSFontFace : public RefCounted<CSSFontFace> {
     45 public:
     46     static PassRefPtr<CSSFontFace> create(FontTraitsMask traitsMask, PassRefPtr<CSSFontFaceRule> rule, bool isLocalFallback = false) { return adoptRef(new CSSFontFace(traitsMask, rule, isLocalFallback)); }
     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(PassOwnPtr<CSSFontFaceSource>);
     64 
     65     void fontLoaded(CSSFontFaceSource*);
     66 
     67     PassRefPtr<SimpleFontData> getFontData(const FontDescription&, bool syntheticBold, bool syntheticItalic);
     68 
     69     struct UnicodeRange {
     70         UnicodeRange(UChar32 from, UChar32 to)
     71             : m_from(from)
     72             , m_to(to)
     73         {
     74         }
     75 
     76         UChar32 from() const { return m_from; }
     77         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     enum LoadState { NotLoaded, Loading, Loaded, Error };
     89     LoadState loadState() const { return m_loadState; }
     90 
     91 private:
     92     CSSFontFace(FontTraitsMask traitsMask, PassRefPtr<CSSFontFaceRule> rule, bool isLocalFallback)
     93         : m_traitsMask(traitsMask)
     94         , m_activeSource(0)
     95         , m_isLocalFallback(isLocalFallback)
     96         , m_loadState(isLocalFallback ? Loaded : NotLoaded)
     97         , m_rule(rule)
     98     {
     99         UNUSED_PARAM(rule);
    100     }
    101     void setLoadState(LoadState);
    102 
    103     FontTraitsMask m_traitsMask;
    104     Vector<UnicodeRange> m_ranges;
    105     HashSet<CSSSegmentedFontFace*> m_segmentedFontFaces;
    106     Vector<OwnPtr<CSSFontFaceSource> > m_sources;
    107     CSSFontFaceSource* m_activeSource;
    108     bool m_isLocalFallback;
    109     LoadState m_loadState;
    110     RefPtr<CSSFontFaceRule> m_rule;
    111 };
    112 
    113 }
    114 
    115 #endif
    116