Source/core/css/CSSSegmentedFontFaceCache.h

/*
 * Copyright (C) 2007, 2008, 2011 Apple Inc. All rights reserved.
 * Copyright (C) 2013 Google Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
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#ifndef CSSSegmentedFontFaceCache_h
#define CSSSegmentedFontFaceCache_h

#include "wtf/Forward.h"
#include "wtf/HashMap.h"
#include "wtf/text/StringHash.h"

namespace WebCore {

class CSSFontFace;
class CSSFontSelector;
class CSSSegmentedFontFace;
class FontDescription;
class StyleRuleFontFace;

class CSSSegmentedFontFaceCache {
public:
    CSSSegmentedFontFaceCache();

    // FIXME: Remove CSSFontSelector as argument. Passing CSSFontSelector here is
    // a result of egregious spaghettification in CSSFontFace/FontFaceSet.
    void addFontFaceRule(CSSFontSelector*, const StyleRuleFontFace*);
    void removeFontFaceRule(const StyleRuleFontFace*);
    CSSSegmentedFontFace* getFontFace(const FontDescription&, const AtomicString& family);

    unsigned version() const { return m_version; }

private:
    typedef HashMap<unsigned, RefPtr<CSSSegmentedFontFace> > TraitsMap;
    typedef HashMap<String, OwnPtr<TraitsMap>, CaseFoldingHash> FamilyToTraitsMap;
    typedef HashMap<const StyleRuleFontFace*, RefPtr<CSSFontFace> > StyleRuleToFontFace;
    FamilyToTraitsMap m_fontFaces;
    FamilyToTraitsMap m_fonts;
    StyleRuleToFontFace m_styleRuleToFontFace;

    // FIXME: See if this could be ditched
    // Used to compare Font instances, and the usage seems suspect.
    unsigned m_version;
};

}

#endif