src/third_party/WebKit/Source/core/svg/SVGPathSeg.h

   1 /*
   2  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
   3  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis@kde.org>
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Library General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2 of the License, or (at your option) any later version.
   9  *
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Library General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Library General Public License
  16  * along with this library; see the file COPYING.LIB.  If not, write to
  17  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  * Boston, MA 02110-1301, USA.
  19  */
  20
  21 #ifndef SVGPathSeg_h
  22 #define SVGPathSeg_h
  23
  24 #include "bindings/core/v8/ScriptWrappable.h"
  25 #include "wtf/RefCounted.h"
  26 #include "wtf/text/WTFString.h"
  27
  28 namespace blink {
  29
  30 enum ListModification {
  31     ListModificationUnknown = 0,
  32     ListModificationInsert = 1,
  33     ListModificationReplace = 2,
  34     ListModificationRemove = 3,
  35     ListModificationAppend = 4
  36 };
  37
  38 enum SVGPathSegType {
  39     PathSegUnknown = 0,
  40     PathSegClosePath = 1,
  41     PathSegMoveToAbs = 2,
  42     PathSegMoveToRel = 3,
  43     PathSegLineToAbs = 4,
  44     PathSegLineToRel = 5,
  45     PathSegCurveToCubicAbs = 6,
  46     PathSegCurveToCubicRel = 7,
  47     PathSegCurveToQuadraticAbs = 8,
  48     PathSegCurveToQuadraticRel = 9,
  49     PathSegArcAbs = 10,
  50     PathSegArcRel = 11,
  51     PathSegLineToHorizontalAbs = 12,
  52     PathSegLineToHorizontalRel = 13,
  53     PathSegLineToVerticalAbs = 14,
  54     PathSegLineToVerticalRel = 15,
  55     PathSegCurveToCubicSmoothAbs = 16,
  56     PathSegCurveToCubicSmoothRel = 17,
  57     PathSegCurveToQuadraticSmoothAbs = 18,
  58     PathSegCurveToQuadraticSmoothRel = 19
  59 };
  60
  61 class SVGPropertyBase;
  62 class SVGPathElement;
  63 class SVGElement;
  64
  65 class SVGPathSeg : public RefCounted<SVGPathSeg>, public ScriptWrappable {
  66 public:
  67     // SVGPathSeg itself is used as a tear-off type.
  68     // FIXME: A tear-off type should be introduced to distinguish animVal/baseVal
  69     typedef SVGPathSeg TearOffType;
  70
  71     explicit SVGPathSeg(SVGPathElement* contextElement);
  72
  73     virtual ~SVGPathSeg() { }
  74
  75     // Forward declare these enums in the w3c naming scheme, for IDL generation
  76     enum {
  77         PATHSEG_UNKNOWN = PathSegUnknown,
  78         PATHSEG_CLOSEPATH = PathSegClosePath,
  79         PATHSEG_MOVETO_ABS = PathSegMoveToAbs,
  80         PATHSEG_MOVETO_REL = PathSegMoveToRel,
  81         PATHSEG_LINETO_ABS = PathSegLineToAbs,
  82         PATHSEG_LINETO_REL = PathSegLineToRel,
  83         PATHSEG_CURVETO_CUBIC_ABS = PathSegCurveToCubicAbs,
  84         PATHSEG_CURVETO_CUBIC_REL = PathSegCurveToCubicRel,
  85         PATHSEG_CURVETO_QUADRATIC_ABS = PathSegCurveToQuadraticAbs,
  86         PATHSEG_CURVETO_QUADRATIC_REL = PathSegCurveToQuadraticRel,
  87         PATHSEG_ARC_ABS = PathSegArcAbs,
  88         PATHSEG_ARC_REL = PathSegArcRel,
  89         PATHSEG_LINETO_HORIZONTAL_ABS = PathSegLineToHorizontalAbs,
  90         PATHSEG_LINETO_HORIZONTAL_REL = PathSegLineToHorizontalRel,
  91         PATHSEG_LINETO_VERTICAL_ABS = PathSegLineToVerticalAbs,
  92         PATHSEG_LINETO_VERTICAL_REL = PathSegLineToVerticalRel,
  93         PATHSEG_CURVETO_CUBIC_SMOOTH_ABS = PathSegCurveToCubicSmoothAbs,
  94         PATHSEG_CURVETO_CUBIC_SMOOTH_REL = PathSegCurveToCubicSmoothRel,
  95         PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS = PathSegCurveToQuadraticSmoothAbs,
  96         PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL = PathSegCurveToQuadraticSmoothRel
  97     };
  98
  99     virtual unsigned short pathSegType() const = 0;
 100     virtual String pathSegTypeAsLetter() const = 0;
 101
 102     SVGPropertyBase* ownerList() const
 103     {
 104         return m_ownerList;
 105     }
 106
 107     void setOwnerList(SVGPropertyBase* ownerList)
 108     {
 109         // Previous owner list must be cleared before setting new owner list.
 110         ASSERT((!ownerList && m_ownerList) || (ownerList && !m_ownerList));
 111
 112         m_ownerList = ownerList;
 113     }
 114
 115     void setContextElement(SVGElement* contextElement)
 116     {
 117         m_contextElement = contextElement;
 118     }
 119
 120     static PassRefPtr<SVGPathSeg> create() { ASSERT_NOT_REACHED(); return nullptr; }
 121     PassRefPtr<SVGPathSeg> clone() { ASSERT_NOT_REACHED(); return nullptr; }
 122
 123 protected:
 124     void commitChange();
 125
 126 private:
 127     // FIXME: oilpan: These are kept as raw ptrs to break reference cycle. Should be Member in oilpan.
 128     SVGPropertyBase* m_ownerList;
 129     SVGElement* m_contextElement;
 130 };
 131
 132 } // namespace blink
 133
 134 #endif