Source/WebCore/css/CSSFontFaceSource.h

/*
 * Copyright (C) 2007, 2008, 2011 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.
 */

#ifndef CSSFontFaceSource_h
#define CSSFontFaceSource_h

#include "CachedFontClient.h"
#include "CachedResourceHandle.h"
#include "SharedBuffer.h"
#if ENABLE(SVG_FONTS)
#include "SVGFontElement.h"
#include "SVGFontFaceElement.h"
#endif
#include "Timer.h"
#include <wtf/HashMap.h>
#include <wtf/text/AtomicString.h>

namespace WebCore {

class CachedFont;
class CSSFontFace;
class CSSFontSelector;
class Font;
class FontDescription;
class FontFeatureSettings;
struct FontVariantSettings;

class CSSFontFaceSource final : public CachedFontClient {
    WTF_MAKE_FAST_ALLOCATED;
public:
    CSSFontFaceSource(const String&, CachedFont* = nullptr);
    virtual ~CSSFontFaceSource();

    bool isLoaded() const;
    bool isValid() const;

    const AtomicString& string() const { return m_string; }

    void setFontFace(CSSFontFace* face) { m_face = face; }

    virtual void fontLoaded(CachedFont*) override;

    RefPtr<Font> font(const FontDescription&, bool syntheticBold, bool syntheticItalic, CSSFontSelector*, const FontFeatureSettings&, const FontVariantSettings&);

    void pruneTable();

#if ENABLE(SVG_FONTS)
    SVGFontFaceElement* svgFontFaceElement() const { return m_svgFontFaceElement.get(); }
    void setSVGFontFaceElement(PassRefPtr<SVGFontFaceElement> element) { m_svgFontFaceElement = element; }
    bool isSVGFontFaceSource() const { return m_svgFontFaceElement || m_hasExternalSVGFont; }
    void setHasExternalSVGFont() { m_hasExternalSVGFont = true; }
#endif

#if ENABLE(FONT_LOAD_EVENTS)
    bool isDecodeError() const;
    bool ensureFontData();
#endif

private:
    void startLoadingTimerFired();

    AtomicString m_string; // URI for remote, built-in font name for local.
    CachedResourceHandle<CachedFont> m_font; // For remote fonts, a pointer to our cached resource.
    CSSFontFace* m_face; // Our owning font face.
    HashMap<unsigned, RefPtr<Font>> m_fontTable; // The hash key is composed of size synthetic styles.

#if ENABLE(SVG_OTF_CONVERTER)
    RefPtr<SharedBuffer> m_generatedOTFBuffer;
#endif

#if ENABLE(SVG_FONTS) || ENABLE(SVG_OTF_CONVERTER)
    RefPtr<SVGFontFaceElement> m_svgFontFaceElement;
    bool m_hasExternalSVGFont;
#endif
};

}

#endif