/*
 * Copyright (C) 2002, 2003 The Karbon Developers
 * Copyright (C) 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