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      1 /*
      2  * Copyright (C) 2002, 2003 The Karbon Developers
      3  * Copyright (C) 2006, 2007 Rob Buis <buis (at) kde.org>
      4  *
      5  * This library is free software; you can redistribute it and/or
      6  * modify it under the terms of the GNU Library General Public
      7  * License as published by the Free Software Foundation; either
      8  * version 2 of the License, or (at your option) any later version.
      9  *
     10  * This library is distributed in the hope that it will be useful,
     11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     13  * Library General Public License for more details.
     14  *
     15  * You should have received a copy of the GNU Library General Public License
     16  * along with this library; see the file COPYING.LIB.  If not, write to
     17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     18  * Boston, MA 02110-1301, USA.
     19  */
     20 
     21 #ifndef SVGParserUtilities_h
     22 #define SVGParserUtilities_h
     23 #if ENABLE(SVG)
     24 
     25 #include "ParserUtilities.h"
     26 #include <wtf/HashSet.h>
     27 
     28 typedef pair<unsigned, unsigned> UnicodeRange;
     29 typedef Vector<UnicodeRange> UnicodeRanges;
     30 
     31 namespace WebCore {
     32 
     33 class SVGPointList;
     34 
     35 bool parseNumber(const UChar*& ptr, const UChar* end, float& number, bool skip = true);
     36 bool parseNumberOptionalNumber(const String& s, float& h, float& v);
     37 bool parseArcFlag(const UChar*& ptr, const UChar* end, bool& flag);
     38 
     39 // SVG allows several different whitespace characters:
     40 // http://www.w3.org/TR/SVG/paths.html#PathDataBNF
     41 inline bool isWhitespace(const UChar& c)
     42 {
     43     return c == ' ' || c == '\t' || c == '\n' || c == '\r';
     44 }
     45 
     46 inline bool skipOptionalSpaces(const UChar*& ptr, const UChar* end)
     47 {
     48     while (ptr < end && isWhitespace(*ptr))
     49         ptr++;
     50     return ptr < end;
     51 }
     52 
     53 inline bool skipOptionalSpacesOrDelimiter(const UChar*& ptr, const UChar* end, UChar delimiter = ',')
     54 {
     55     if (ptr < end && !isWhitespace(*ptr) && *ptr != delimiter)
     56         return false;
     57     if (skipOptionalSpaces(ptr, end)) {
     58         if (ptr < end && *ptr == delimiter) {
     59             ptr++;
     60             skipOptionalSpaces(ptr, end);
     61         }
     62     }
     63     return ptr < end;
     64 }
     65 
     66 bool pointsListFromSVGData(SVGPointList& pointsList, const String& points);
     67 Vector<String> parseDelimitedString(const String& input, const char seperator);
     68 bool parseKerningUnicodeString(const String& input, UnicodeRanges&, HashSet<String>& stringList);
     69 bool parseGlyphName(const String& input, HashSet<String>& values);
     70 
     71 } // namespace WebCore
     72 
     73 #endif // ENABLE(SVG)
     74 #endif // SVGParserUtilities_h
     75