1/*
2 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
3 *
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
8 *
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
12 * Library General Public License for more details.
13 *
14 * You should have received a copy of the GNU Library General Public License
15 * along with this library; see the file COPYING.LIB.  If not, write to
16 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
17 * Boston, MA 02110-1301, USA.
18 */
19
20#ifndef SVGPathByteStreamSource_h
21#define SVGPathByteStreamSource_h
22
23#if ENABLE(SVG)
24#include "FloatPoint.h"
25#include "SVGPathByteStream.h"
26#include "SVGPathSource.h"
27#include <wtf/PassOwnPtr.h>
28
29namespace WebCore {
30
31class SVGPathByteStreamSource : public SVGPathSource {
32public:
33    static PassOwnPtr<SVGPathByteStreamSource> create(SVGPathByteStream* stream)
34    {
35        return adoptPtr(new SVGPathByteStreamSource(stream));
36    }
37
38private:
39    SVGPathByteStreamSource(SVGPathByteStream*);
40
41    virtual bool hasMoreData() const;
42    virtual bool moveToNextToken() { return true; }
43    virtual bool parseSVGSegmentType(SVGPathSegType&);
44    virtual SVGPathSegType nextCommand(SVGPathSegType);
45
46    virtual bool parseMoveToSegment(FloatPoint&);
47    virtual bool parseLineToSegment(FloatPoint&);
48    virtual bool parseLineToHorizontalSegment(float&);
49    virtual bool parseLineToVerticalSegment(float&);
50    virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&);
51    virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&);
52    virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&);
53    virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&);
54    virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&);
55
56#if COMPILER(MSVC)
57#pragma warning(disable: 4701)
58#endif
59    template<typename DataType, typename ByteType>
60    DataType readType()
61    {
62        ByteType data;
63        size_t typeSize = sizeof(ByteType);
64
65        for (size_t i = 0; i < typeSize; ++i) {
66            ASSERT(m_streamCurrent < m_streamEnd);
67            data.bytes[i] = *m_streamCurrent;
68            ++m_streamCurrent;
69        }
70
71        return data.value;
72    }
73
74    bool readFlag()
75    {
76        return readType<bool, BoolByte>();
77    }
78
79    float readFloat()
80    {
81        return readType<float, FloatByte>();
82    }
83
84    unsigned short readSVGSegmentType()
85    {
86        return readType<unsigned short, UnsignedShortByte>();
87    }
88
89    FloatPoint readFloatPoint()
90    {
91        float x = readType<float, FloatByte>();
92        float y = readType<float, FloatByte>();
93        return FloatPoint(x, y);
94    }
95
96    SVGPathByteStream* m_stream;
97    SVGPathByteStream::DataIterator m_streamCurrent;
98    SVGPathByteStream::DataIterator m_streamEnd;
99};
100
101} // namespace WebCore
102
103#endif // ENABLE(SVG)
104#endif // SVGPathByteStreamSource_h
105