/*

   Copyright (C) 2002, 2003 The Karbon Developers

                 2006, 2007 Rob Buis <buis@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 SVGParserUtilities_h

#define SVGParserUtilities_h

#if ENABLE(SVG)

#include "ParserUtilities.h"

#include <wtf/HashSet.h>

typedef pair<unsigned, unsigned> UnicodeRange;

typedef Vector<UnicodeRange> UnicodeRanges;

namespace WebCore {

    class SVGPointList;

    bool parseNumber(const UChar*& ptr, const UChar* end, float& number, bool skip = true);

    bool parseNumberOptionalNumber(const String& s, float& h, float& v);

    bool parseArcFlag(const UChar*& ptr, const UChar* end, bool& flag);

    // SVG allows several different whitespace characters:

    // http://www.w3.org/TR/SVG/paths.html#PathDataBNF

    inline bool isWhitespace(const UChar& c)

    {

        return (c == ' ' || c == '\t' || c == '\n' || c == '\r');

    }

    inline bool skipOptionalSpaces(const UChar*& ptr, const UChar* end)

    {

        while (ptr < end && isWhitespace(*ptr))

            ptr++;

        return ptr < end;

    }

    inline bool skipOptionalSpacesOrDelimiter(const UChar*& ptr, const UChar* end, UChar delimiter = ',')

    {

        if (ptr < end && !isWhitespace(*ptr) && *ptr != delimiter)

            return false;

        if (skipOptionalSpaces(ptr, end)) {

            if (ptr < end && *ptr == delimiter) {

                ptr++;

                skipOptionalSpaces(ptr, end);

            }

        }

        return ptr < end;

    }

    bool pointsListFromSVGData(SVGPointList* pointsList, const String& points);

    Vector<String> parseDelimitedString(const String& input, const char seperator);

    bool parseKerningUnicodeString(const String& input, UnicodeRanges&, HashSet<String>& stringList);

    bool parseGlyphName(const String& input, HashSet<String>& values);

} // namespace WebCore

#endif // ENABLE(SVG)

#endif // SVGParserUtilities_h