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 SVGPathByteStreamBuilder_h
21#define SVGPathByteStreamBuilder_h
22
23#include "FloatPoint.h"
24#include "SVGPathByteStream.h"
25#include "SVGPathConsumer.h"
26#include <wtf/text/WTFString.h>
27
28namespace WebCore {
29
30class SVGPathByteStreamBuilder : public SVGPathConsumer {
31public:
32    SVGPathByteStreamBuilder();
33
34    void setCurrentByteStream(SVGPathByteStream* byteStream) { m_byteStream = byteStream; }
35
36private:
37    virtual void incrementPathSegmentCount() override { }
38    virtual bool continueConsuming() override { return true; }
39    virtual void cleanup() override { m_byteStream = 0; }
40
41    // Used in UnalteredParsing/NormalizedParsing modes.
42    virtual void moveTo(const FloatPoint&, bool closed, PathCoordinateMode) override;
43    virtual void lineTo(const FloatPoint&, PathCoordinateMode) override;
44    virtual void curveToCubic(const FloatPoint&, const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
45    virtual void closePath() override;
46
47    // Only used in UnalteredParsing mode.
48    virtual void lineToHorizontal(float, PathCoordinateMode) override;
49    virtual void lineToVertical(float, PathCoordinateMode) override;
50    virtual void curveToCubicSmooth(const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
51    virtual void curveToQuadratic(const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
52    virtual void curveToQuadraticSmooth(const FloatPoint&, PathCoordinateMode) override;
53    virtual void arcTo(float, float, float, bool largeArcFlag, bool sweepFlag, const FloatPoint&, PathCoordinateMode) override;
54
55    template<typename ByteType>
56    void writeType(const ByteType& type)
57    {
58        size_t typeSize = sizeof(ByteType);
59        for (size_t i = 0; i < typeSize; ++i)
60            m_byteStream->append(type.bytes[i]);
61    }
62
63    void writeFlag(bool value)
64    {
65        BoolByte data;
66        data.value = value;
67        writeType(data);
68    }
69
70    void writeFloat(float value)
71    {
72        FloatByte data;
73        data.value = value;
74        writeType(data);
75    }
76
77    void writeFloatPoint(const FloatPoint& point)
78    {
79        writeFloat(point.x());
80        writeFloat(point.y());
81    }
82
83    void writeSegmentType(unsigned short value)
84    {
85        UnsignedShortByte data;
86        data.value = value;
87        writeType(data);
88    }
89
90    SVGPathByteStream* m_byteStream;
91};
92
93} // namespace WebCore
94
95#endif // SVGPathByteStreamBuilder_h
96