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PathTraversalState.h
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1 /*
2  * Copyright (C) 2006, 2007 Eric Seidel <eric@webkit.org>
3  *
4  * Redistribution and use in source and binary forms, with or without
5  * modification, are permitted provided that the following conditions
6  * are met:
7  * 1. Redistributions of source code must retain the above copyright
8  * notice, this list of conditions and the following disclaimer.
9  * 2. Redistributions in binary form must reproduce the above copyright
10  * notice, this list of conditions and the following disclaimer in the
11  * documentation and/or other materials provided with the distribution.
12  *
13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24  */
25 
26 #ifndef PathTraversalState_h
27 #define PathTraversalState_h
28 
29 #include "FloatPoint.h"
30 #include <wtf/Vector.h>
31 
32 namespace khtml {
33  class Path;
34 }
35 
36 namespace WebCore {
37  typedef khtml::Path Path;
38 
39  class PathTraversalState {
40  public:
41  enum PathTraversalAction {
42  TraversalTotalLength,
43  TraversalPointAtLength,
44  TraversalSegmentAtLength,
45  TraversalNormalAngleAtLength
46  };
47 
48  PathTraversalState(PathTraversalAction);
49 
50  float closeSubpath();
51  float moveTo(const FloatPoint&);
52  float lineTo(const FloatPoint&);
53  float quadraticBezierTo(const FloatPoint& newControl, const FloatPoint& newEnd);
54  float cubicBezierTo(const FloatPoint& newControl1, const FloatPoint& newControl2, const FloatPoint& newEnd);
55 
56  public:
57  PathTraversalAction m_action;
58  bool m_success;
59 
60  FloatPoint m_current;
61  FloatPoint m_start;
62  FloatPoint m_control1;
63  FloatPoint m_control2;
64 
65  float m_totalLength;
66  unsigned m_segmentIndex;
67  float m_desiredLength;
68 
69  // For normal calculations
70  FloatPoint m_previous;
71  float m_normalAngle; // degrees
72  };
73 }
74 
75 #endif
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