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#include "core/svg/SVGPathByteStream.h"
24#include "core/svg/SVGPathSource.h"
25#include "platform/geometry/FloatPoint.h"
26#include "wtf/PassOwnPtr.h"
27
28namespace WebCore {
29
30class SVGPathByteStreamSource : public SVGPathSource {
31public:
32    static PassOwnPtr<SVGPathByteStreamSource> create(SVGPathByteStream* stream)
33    {
34        return adoptPtr(new SVGPathByteStreamSource(stream));
35    }
36
37private:
38    SVGPathByteStreamSource(SVGPathByteStream*);
39
40    virtual bool hasMoreData() const;
41    virtual bool moveToNextToken() { return true; }
42    virtual bool parseSVGSegmentType(SVGPathSegType&);
43    virtual SVGPathSegType nextCommand(SVGPathSegType);
44
45    virtual bool parseMoveToSegment(FloatPoint&);
46    virtual bool parseLineToSegment(FloatPoint&);
47    virtual bool parseLineToHorizontalSegment(float&);
48    virtual bool parseLineToVerticalSegment(float&);
49    virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&);
50    virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&);
51    virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&);
52    virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&);
53    virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&);
54
55#if COMPILER(MSVC)
56#pragma warning(disable: 4701)
57#endif
58    template<typename DataType, typename ByteType>
59    DataType readType()
60    {
61        ByteType data;
62        size_t typeSize = sizeof(ByteType);
63
64        for (size_t i = 0; i < typeSize; ++i) {
65            ASSERT(m_streamCurrent < m_streamEnd);
66            data.bytes[i] = *m_streamCurrent;
67            ++m_streamCurrent;
68        }
69
70        return data.value;
71    }
72
73    bool readFlag()
74    {
75        return readType<bool, BoolByte>();
76    }
77
78    float readFloat()
79    {
80        return readType<float, FloatByte>();
81    }
82
83    unsigned short readSVGSegmentType()
84    {
85        return readType<unsigned short, UnsignedShortByte>();
86    }
87
88    FloatPoint readFloatPoint()
89    {
90        float x = readType<float, FloatByte>();
91        float y = readType<float, FloatByte>();
92        return FloatPoint(x, y);
93    }
94
95    SVGPathByteStream::DataIterator m_streamCurrent;
96    SVGPathByteStream::DataIterator m_streamEnd;
97};
98
99} // namespace WebCore
100
101#endif // SVGPathByteStreamSource_h
102