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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  * Copyright (C) 2013 Apple Inc. All rights reserved.
      5  *
      6  * This library is free software; you can redistribute it and/or
      7  * modify it under the terms of the GNU Library General Public
      8  * License as published by the Free Software Foundation; either
      9  * version 2 of the License, or (at your option) any later version.
     10  *
     11  * This library is distributed in the hope that it will be useful,
     12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
     13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14  * Library General Public License for more details.
     15  *
     16  * You should have received a copy of the GNU Library General Public License
     17  * along with this library; see the file COPYING.LIB.  If not, write to
     18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
     19  * Boston, MA 02110-1301, USA.
     20  */
     21 
     22 #ifndef SVGParserUtilities_h
     23 #define SVGParserUtilities_h
     24 
     25 #include "core/svg/SVGTransform.h"
     26 #include "platform/text/ParserUtilities.h"
     27 #include "wtf/HashSet.h"
     28 
     29 typedef pair<unsigned, unsigned> UnicodeRange;
     30 typedef Vector<UnicodeRange> UnicodeRanges;
     31 
     32 namespace WebCore {
     33 
     34 class FloatPoint;
     35 class FloatRect;
     36 class SVGPointList;
     37 class SVGTransformList;
     38 
     39 template <typename CharType>
     40 bool parseSVGNumber(CharType* ptr, size_t length, double& number);
     41 bool parseNumber(const LChar*& ptr, const LChar* end, float& number, bool skip = true);
     42 bool parseNumber(const UChar*& ptr, const UChar* end, float& number, bool skip = true);
     43 bool parseNumberFromString(const String&, float& number, bool skip = true);
     44 bool parseNumberOptionalNumber(const String& s, float& h, float& v);
     45 bool parseArcFlag(const LChar*& ptr, const LChar* end, bool& flag);
     46 bool parseArcFlag(const UChar*& ptr, const UChar* end, bool& flag);
     47 bool parseRect(const String&, FloatRect&);
     48 
     49 template <typename CharType>
     50 bool parseFloatPoint(const CharType*& current, const CharType* end, FloatPoint&);
     51 template <typename CharType>
     52 bool parseFloatPoint2(const CharType*& current, const CharType* end, FloatPoint&, FloatPoint&);
     53 template <typename CharType>
     54 bool parseFloatPoint3(const CharType*& current, const CharType* end, FloatPoint&, FloatPoint&, FloatPoint&);
     55 
     56 // SVG allows several different whitespace characters:
     57 // http://www.w3.org/TR/SVG/paths.html#PathDataBNF
     58 template <typename CharType>
     59 inline bool isSVGSpace(CharType c)
     60 {
     61     return c == ' ' || c == '\t' || c == '\n' || c == '\r';
     62 }
     63 
     64 template <typename CharType>
     65 inline bool skipOptionalSVGSpaces(const CharType*& ptr, const CharType* end)
     66 {
     67     while (ptr < end && isSVGSpace(*ptr))
     68         ptr++;
     69     return ptr < end;
     70 }
     71 
     72 template <typename CharType>
     73 inline bool skipOptionalSVGSpacesOrDelimiter(const CharType*& ptr, const CharType* end, char delimiter = ',')
     74 {
     75     if (ptr < end && !isSVGSpace(*ptr) && *ptr != delimiter)
     76         return false;
     77     if (skipOptionalSVGSpaces(ptr, end)) {
     78         if (ptr < end && *ptr == delimiter) {
     79             ptr++;
     80             skipOptionalSVGSpaces(ptr, end);
     81         }
     82     }
     83     return ptr < end;
     84 }
     85 
     86 bool pointsListFromSVGData(SVGPointList& pointsList, const String& points);
     87 Vector<String> parseDelimitedString(const String& input, const char seperator);
     88 bool parseKerningUnicodeString(const String& input, UnicodeRanges&, HashSet<String>& stringList);
     89 bool parseGlyphName(const String& input, HashSet<String>& values);
     90 
     91 enum TransformParsingMode {
     92     ClearList,
     93     DoNotClearList
     94 };
     95 
     96 bool parseTransformAttribute(SVGTransformList&, const LChar*& ptr, const LChar* end, TransformParsingMode = ClearList);
     97 bool parseTransformAttribute(SVGTransformList&, const UChar*& ptr, const UChar* end, TransformParsingMode = ClearList);
     98 
     99 bool parseTransformValue(unsigned type, const LChar*& ptr, const LChar* end, SVGTransform&);
    100 bool parseTransformValue(unsigned type, const UChar*& ptr, const UChar* end, SVGTransform&);
    101 
    102 SVGTransform::SVGTransformType parseTransformType(const String&);
    103 
    104 } // namespace WebCore
    105 
    106 #endif // SVGParserUtilities_h
    107