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      1 /*
      2  * Copyright (C) 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 CSSSegmentedFontFace_h
     27 #define CSSSegmentedFontFace_h
     28 
     29 #include "platform/fonts/FontTraitsMask.h"
     30 #include "wtf/HashMap.h"
     31 #include "wtf/PassRefPtr.h"
     32 #include "wtf/RefCounted.h"
     33 #include "wtf/Vector.h"
     34 #include "wtf/text/WTFString.h"
     35 
     36 namespace WebCore {
     37 
     38 class CSSFontFace;
     39 class CSSFontSelector;
     40 class FontData;
     41 class FontDescription;
     42 class FontFace;
     43 class SegmentedFontData;
     44 
     45 class CSSSegmentedFontFace : public RefCounted<CSSSegmentedFontFace> {
     46 public:
     47     static PassRefPtr<CSSSegmentedFontFace> create(CSSFontSelector* selector, FontTraitsMask traitsMask) { return adoptRef(new CSSSegmentedFontFace(selector, traitsMask)); }
     48     ~CSSSegmentedFontFace();
     49 
     50     CSSFontSelector* fontSelector() const { return m_fontSelector; }
     51     FontTraitsMask traitsMask() const { return m_traitsMask; }
     52 
     53     void fontLoaded(CSSFontFace*);
     54 
     55     void appendFontFace(PassRefPtr<CSSFontFace>);
     56     void removeFontFace(PassRefPtr<CSSFontFace>);
     57     bool isEmpty() const { return m_fontFaces.isEmpty(); }
     58 
     59     PassRefPtr<FontData> getFontData(const FontDescription&);
     60 
     61     class LoadFontCallback : public RefCounted<LoadFontCallback> {
     62     public:
     63         virtual ~LoadFontCallback() { }
     64         virtual void notifyLoaded(CSSSegmentedFontFace*) = 0;
     65         virtual void notifyError(CSSSegmentedFontFace*) = 0;
     66     };
     67 
     68     bool checkFont(const String&) const;
     69     void loadFont(const FontDescription&, const String&, PassRefPtr<LoadFontCallback>);
     70     Vector<RefPtr<FontFace> > fontFaces(const String& text) const;
     71     void willUseFontData(const FontDescription&);
     72 
     73 private:
     74     CSSSegmentedFontFace(CSSFontSelector*, FontTraitsMask);
     75 
     76     void pruneTable();
     77     bool isValid() const;
     78     bool isLoading() const;
     79     bool isLoaded() const;
     80 
     81     CSSFontSelector* m_fontSelector;
     82     FontTraitsMask m_traitsMask;
     83     HashMap<unsigned, RefPtr<SegmentedFontData> > m_fontDataTable;
     84     Vector<RefPtr<CSSFontFace>, 1> m_fontFaces;
     85     Vector<RefPtr<LoadFontCallback> > m_callbacks;
     86 };
     87 
     88 } // namespace WebCore
     89 
     90 #endif // CSSSegmentedFontFace_h
     91