/*
   Copyright (C) 2007 Eric Seidel <eric@webkit.org>
   Copyright (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
 */

#ifndef SVGFontElement_h
#define SVGFontElement_h

#if ENABLE(SVG_FONTS)
#include "SVGExternalResourcesRequired.h"
#include "SVGGlyphElement.h"
#include "SVGGlyphMap.h"
#include "SVGHKernElement.h"
#include "SVGStyledElement.h"

namespace WebCore
{

class SVGMissingGlyphElement;
class SVGFontElement : public SVGStyledElement
    , public SVGExternalResourcesRequired
{
public:
    SVGFontElement(const QualifiedName &, Document *);
    virtual ~SVGFontElement();

    virtual bool rendererIsNeeded(RenderStyle *)
    {
        return false;
    }
    virtual const SVGElement *contextElement() const
    {
        return this;
    }

    void invalidateGlyphCache();

    void getGlyphIdentifiersForString(const String &, Vector<SVGGlyphIdentifier> &) const;

    bool getHorizontalKerningPairForStringsAndGlyphs(const String &u1, const String &g1, const String &u2, const String &g2, SVGHorizontalKerningPair &kerningPair) const;

    SVGMissingGlyphElement *firstMissingGlyphElement() const;

    // KHTML ElementImpl pure virtual method
    virtual quint32 id() const
    {
        return SVGNames::textTag.id();
    }
private:
    void ensureGlyphCache() const;

    typedef Vector<SVGHorizontalKerningPair> KerningPairVector;

    mutable KerningPairVector m_kerningPairs;
    mutable SVGGlyphMap m_glyphMap;
    mutable bool m_isGlyphCacheValid;
};

} // namespace WebCore

#endif // ENABLE(SVG_FONTS)
#endif

