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      1 /*
      2  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann (at) kde.org>
      3  * Copyright (C) 2004, 2005, 2006, 2008 Rob Buis <buis (at) 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     DEFINE_WRAPPERTYPEINFO();
     67 public:
     68     // SVGPathSeg itself is used as a tear-off type.
     69     // FIXME: A tear-off type should be introduced to distinguish animVal/baseVal
     70     typedef SVGPathSeg TearOffType;
     71 
     72     explicit SVGPathSeg(SVGPathElement* contextElement);
     73 
     74     virtual ~SVGPathSeg() { }
     75 
     76     // Forward declare these enums in the w3c naming scheme, for IDL generation
     77     enum {
     78         PATHSEG_UNKNOWN = PathSegUnknown,
     79         PATHSEG_CLOSEPATH = PathSegClosePath,
     80         PATHSEG_MOVETO_ABS = PathSegMoveToAbs,
     81         PATHSEG_MOVETO_REL = PathSegMoveToRel,
     82         PATHSEG_LINETO_ABS = PathSegLineToAbs,
     83         PATHSEG_LINETO_REL = PathSegLineToRel,
     84         PATHSEG_CURVETO_CUBIC_ABS = PathSegCurveToCubicAbs,
     85         PATHSEG_CURVETO_CUBIC_REL = PathSegCurveToCubicRel,
     86         PATHSEG_CURVETO_QUADRATIC_ABS = PathSegCurveToQuadraticAbs,
     87         PATHSEG_CURVETO_QUADRATIC_REL = PathSegCurveToQuadraticRel,
     88         PATHSEG_ARC_ABS = PathSegArcAbs,
     89         PATHSEG_ARC_REL = PathSegArcRel,
     90         PATHSEG_LINETO_HORIZONTAL_ABS = PathSegLineToHorizontalAbs,
     91         PATHSEG_LINETO_HORIZONTAL_REL = PathSegLineToHorizontalRel,
     92         PATHSEG_LINETO_VERTICAL_ABS = PathSegLineToVerticalAbs,
     93         PATHSEG_LINETO_VERTICAL_REL = PathSegLineToVerticalRel,
     94         PATHSEG_CURVETO_CUBIC_SMOOTH_ABS = PathSegCurveToCubicSmoothAbs,
     95         PATHSEG_CURVETO_CUBIC_SMOOTH_REL = PathSegCurveToCubicSmoothRel,
     96         PATHSEG_CURVETO_QUADRATIC_SMOOTH_ABS = PathSegCurveToQuadraticSmoothAbs,
     97         PATHSEG_CURVETO_QUADRATIC_SMOOTH_REL = PathSegCurveToQuadraticSmoothRel
     98     };
     99 
    100     virtual unsigned short pathSegType() const = 0;
    101     virtual String pathSegTypeAsLetter() const = 0;
    102 
    103     SVGPropertyBase* ownerList() const
    104     {
    105         return m_ownerList;
    106     }
    107 
    108     void setOwnerList(SVGPropertyBase* ownerList)
    109     {
    110         // Previous owner list must be cleared before setting new owner list.
    111         ASSERT((!ownerList && m_ownerList) || (ownerList && !m_ownerList));
    112 
    113         m_ownerList = ownerList;
    114     }
    115 
    116     void setContextElement(SVGElement* contextElement)
    117     {
    118         m_contextElement = contextElement;
    119     }
    120 
    121     static PassRefPtr<SVGPathSeg> create() { ASSERT_NOT_REACHED(); return nullptr; }
    122     PassRefPtr<SVGPathSeg> clone() { ASSERT_NOT_REACHED(); return nullptr; }
    123 
    124 protected:
    125     void commitChange();
    126 
    127 private:
    128     // FIXME: oilpan: These are kept as raw ptrs to break reference cycle. Should be Member in oilpan.
    129     SVGPropertyBase* m_ownerList;
    130     SVGElement* m_contextElement;
    131 };
    132 
    133 } // namespace blink
    134 
    135 #endif // SVGPathSeg_h
    136