1/*
2 * Copyright (C) 2002, 2003 The Karbon Developers
3 * Copyright (C) 2006, 2007 Rob Buis <buis@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
29typedef pair<unsigned, unsigned> UnicodeRange;
30typedef Vector<UnicodeRange> UnicodeRanges;
31
32namespace WebCore {
33
34class FloatPoint;
35class FloatRect;
36class SVGPointList;
37class SVGTransformList;
38
39template <typename CharType>
40bool parseSVGNumber(CharType* ptr, size_t length, double& number);
41bool parseNumber(const LChar*& ptr, const LChar* end, float& number, bool skip = true);
42bool parseNumber(const UChar*& ptr, const UChar* end, float& number, bool skip = true);
43bool parseNumberFromString(const String&, float& number, bool skip = true);
44bool parseNumberOptionalNumber(const String& s, float& h, float& v);
45bool parseArcFlag(const LChar*& ptr, const LChar* end, bool& flag);
46bool parseArcFlag(const UChar*& ptr, const UChar* end, bool& flag);
47bool parseRect(const String&, FloatRect&);
48
49template <typename CharType>
50bool parseFloatPoint(const CharType*& current, const CharType* end, FloatPoint&);
51template <typename CharType>
52bool parseFloatPoint2(const CharType*& current, const CharType* end, FloatPoint&, FloatPoint&);
53template <typename CharType>
54bool 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
58template <typename CharType>
59inline bool isSVGSpace(CharType c)
60{
61    return c == ' ' || c == '\t' || c == '\n' || c == '\r';
62}
63
64template <typename CharType>
65inline bool skipOptionalSVGSpaces(const CharType*& ptr, const CharType* end)
66{
67    while (ptr < end && isSVGSpace(*ptr))
68        ptr++;
69    return ptr < end;
70}
71
72template <typename CharType>
73inline 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
86bool pointsListFromSVGData(SVGPointList& pointsList, const String& points);
87Vector<String> parseDelimitedString(const String& input, const char seperator);
88bool parseKerningUnicodeString(const String& input, UnicodeRanges&, HashSet<String>& stringList);
89bool parseGlyphName(const String& input, HashSet<String>& values);
90
91enum TransformParsingMode {
92    ClearList,
93    DoNotClearList
94};
95
96bool parseTransformAttribute(SVGTransformList&, const LChar*& ptr, const LChar* end, TransformParsingMode = ClearList);
97bool parseTransformAttribute(SVGTransformList&, const UChar*& ptr, const UChar* end, TransformParsingMode = ClearList);
98
99bool parseTransformValue(unsigned type, const LChar*& ptr, const LChar* end, SVGTransform&);
100bool parseTransformValue(unsigned type, const UChar*& ptr, const UChar* end, SVGTransform&);
101
102SVGTransform::SVGTransformType parseTransformType(const String&);
103
104} // namespace WebCore
105
106#endif // SVGParserUtilities_h
107