CachedFont.h   [plain text]

/*
 * Copyright (C) 2007, 2008 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
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#pragma once

#include "CachedResource.h"
#include "CachedResourceClient.h"
#include "Font.h"
#include "TextFlags.h"

namespace WebCore {

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

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

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

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

    virtual bool ensureCustomFontData(const AtomicString& remoteURI);
    static std::unique_ptr<FontCustomPlatformData> createCustomFontData(SharedBuffer&, bool& wrapping);
    static FontPlatformData platformDataFromCustomData(FontCustomPlatformData&, const FontDescription&, bool bold, bool italic, const FontFeatureSettings&, const FontVariantSettings&);

    virtual RefPtr<Font> createFont(const FontDescription&, const AtomicString& remoteURI, bool syntheticBold, bool syntheticItalic, const FontFeatureSettings&, const FontVariantSettings&);

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

    bool ensureCustomFontData(SharedBuffer* data);

private:
    void checkNotify() 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(SharedBuffer*) override;

    void allClientsRemoved() override;

    std::unique_ptr<FontCustomPlatformData> m_fontCustomPlatformData;
    bool m_loadInitiated;
    bool m_hasCreatedFontDataWrappingResource;

    friend class MemoryCache;
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_CACHED_RESOURCE(CachedFont, CachedResource::FontResource)