Source/WebCore/loader/cache/CachedFont.h

/*
 * Copyright (C) 2007-2021 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
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 *    documentation and/or other materials provided with the distribution.
 *
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#pragma once

#include "CachedResource.h"
#include "CachedResourceClient.h"
#include "Font.h"
#include "TextFlags.h"
#include <pal/SessionID.h>

namespace WebCore {

class CachedResourceLoader;
class FontCreationContext;
class FontDescription;
class FontPlatformData;
struct FontSelectionSpecifiedCapabilities;
class SVGDocument;
class SVGFontElement;
struct FontCustomPlatformData;

template <typename T> class FontTaggedSettings;
typedef FontTaggedSettings<int> FontFeatureSettings;

class CachedFont : public CachedResource {
public:
    CachedFont(CachedResourceRequest&&, PAL::SessionID, const CookieJar*, Type = Type::FontResource);
    virtual ~CachedFont();

    void beginLoadIfNeeded(CachedResourceLoader&);
    bool stillNeedsLoad() const override { return !m_loadInitiated; }

    virtual bool ensureCustomFontData(const AtomString& remoteURI);
    static std::unique_ptr<FontCustomPlatformData> createCustomFontData(SharedBuffer&, const String& itemInCollection, bool& wrapping);
    static FontPlatformData platformDataFromCustomData(FontCustomPlatformData&, const FontDescription&, bool bold, bool italic, const FontCreationContext&);

    virtual RefPtr<Font> createFont(const FontDescription&, const AtomString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontCreationContext&);

protected:
    FontPlatformData platformDataFromCustomData(const FontDescription&, bool bold, bool italic, const FontCreationContext&);

    bool ensureCustomFontData(SharedBuffer* data);

private:
    String calculateItemInCollection() const;

    void checkNotify(const NetworkLoadMetrics&) override;
    bool mayTryReplaceEncodedData() const override;

    void load(CachedResourceLoader&) override;
    NO_RETURN_DUE_TO_ASSERT void setBodyDataFrom(const CachedResource&) final { ASSERT_NOT_REACHED(); }

    void didAddClient(CachedResourceClient&) override;
    void finishLoading(const FragmentedSharedBuffer*, const NetworkLoadMetrics&) override;

    void allClientsRemoved() override;

    bool m_loadInitiated;
    bool m_hasCreatedFontDataWrappingResource;

    std::unique_ptr<FontCustomPlatformData> m_fontCustomPlatformData;

    friend class MemoryCache;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CACHED_RESOURCE(CachedFont, CachedResource::Type::FontResource)