public SvgPathSegList(ISvgPathSegList pathList)
{
_pathScript = string.Empty;
_readOnly = false;
_isClosed = false;
_mayHaveCurves = false;
if (pathList == null)
{
_segments = new List <ISvgPathSeg>();
}
else
{
_segments = new List <ISvgPathSeg>(pathList);
var segList = pathList as SvgPathSegList;
if (segList != null)
{
_pathScript = segList.PathScript;
_readOnly = segList.IsReadOnly;
_isClosed = segList.IsClosed;
_mayHaveCurves = segList.MayHaveCurves;
}
}
}
public SvgPathSegList(ISvgPathSegList pathList)
{
_pathScript = string.Empty;
_readOnly = false;
_isClosed = false;
_mayHaveCurves = false;
if (pathList == null)
{
_segments = new List <SvgPathSeg>();
}
else
{
_segments = new List <SvgPathSeg>(pathList.NumberOfItems);
for (int i = 0; i < pathList.NumberOfItems; i++)
{
_segments.Add((SvgPathSeg)pathList.GetItem(i));
}
var segList = pathList as SvgPathSegList;
if (segList != null)
{
_pathScript = segList.PathScript;
_readOnly = segList.IsReadOnly;
_isClosed = segList.IsClosed;
_mayHaveCurves = segList.MayHaveCurves;
}
}
}
public override void HandleAttributeChange(XmlAttribute attribute)
{
if (attribute.NamespaceURI.Length == 0)
{
switch (attribute.LocalName)
{
case "d":
pathSegList = null;
Invalidate();
return;
case "pathLength":
_pathLength = null;
Invalidate();
return;
case "marker-start":
case "marker-mid":
case "marker-end":
// Color.attrib, Paint.attrib
case "color":
case "fill":
case "fill-rule":
case "stroke":
case "stroke-dasharray":
case "stroke-dashoffset":
case "stroke-linecap":
case "stroke-linejoin":
case "stroke-miterlimit":
case "stroke-width":
// Opacity.attrib
case "opacity":
case "stroke-opacity":
case "fill-opacity":
// Graphics.attrib
case "display":
case "image-rendering":
case "shape-rendering":
case "text-rendering":
case "visibility":
Invalidate();
break;
case "transform":
Invalidate();
break;
}
base.HandleAttributeChange(attribute);
}
}
public bool Parse(ISvgPathSegList pathList, string pathSegs)
{
if (pathList == null || string.IsNullOrWhiteSpace(pathSegs))
{
return(false);
}
_isClosed = false;
_mayHaveCurves = false;
int closedPath = 0;
ISvgPathSeg seg;
string[] segs = RegexPathCmd.Split(pathSegs);
SvgPointF startPoint = new SvgPointF(0, 0);
foreach (string s in segs)
{
string segment = s.Trim();
if (segment.Length > 0)
{
char cmd = segment.ToCharArray(0, 1)[0];
double[] coords = ParseCoords(segment);
int length = coords.Length;
switch (cmd)
{
#region moveto
case 'M':
for (int i = 0; i < length; i += 2)
{
if (i == 0)
{
seg = new SvgPathSegMovetoAbs(coords[i], coords[i + 1]);
startPoint = new SvgPointF(coords[i], coords[i + 1]);
SvgPointF endPoint = new SvgPointF(coords[i], coords[i + 1]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
else
{
seg = new SvgPathSegLinetoAbs(coords[i], coords[i + 1]);
SvgPointF endPoint = new SvgPointF(coords[i], coords[i + 1]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
pathList.AppendItem(seg);
}
break;
case 'm':
for (int i = 0; i < length; i += 2)
{
if (i == 0)
{
seg = new SvgPathSegMovetoRel(coords[i], coords[i + 1]);
SvgPointF endPoint = new SvgPointF(coords[i] + startPoint.X, coords[i + 1] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
else
{
seg = new SvgPathSegLinetoRel(coords[i], coords[i + 1]);
SvgPointF endPoint = new SvgPointF(coords[i] + startPoint.X, coords[i + 1] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
pathList.AppendItem(seg);
}
break;
#endregion
#region lineto
case 'L':
for (int i = 0; i < length; i += 2)
{
seg = new SvgPathSegLinetoAbs(coords[i], coords[i + 1]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(coords[i], coords[i + 1]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'l':
for (int i = 0; i < length; i += 2)
{
seg = new SvgPathSegLinetoRel(coords[i], coords[i + 1]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(coords[i] + startPoint.X, coords[i + 1] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'H':
for (int i = 0; i < length; i++)
{
seg = new SvgPathSegLinetoHorizontalAbs(coords[i]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(coords[i], startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'h':
for (int i = 0; i < length; i++)
{
seg = new SvgPathSegLinetoHorizontalRel(coords[i]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(coords[i] + startPoint.X, startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'V':
for (int i = 0; i < length; i++)
{
seg = new SvgPathSegLinetoVerticalAbs(coords[i]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(startPoint.X, coords[i]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'v':
for (int i = 0; i < length; i++)
{
seg = new SvgPathSegLinetoVerticalRel(coords[i]);
pathList.AppendItem(seg);
SvgPointF endPoint = new SvgPointF(startPoint.X, coords[i] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
#endregion
#region beziers
case 'C':
for (int i = 0; i < length; i += 6)
{
seg = new SvgPathSegCurvetoCubicAbs(
coords[i + 4],
coords[i + 5],
coords[i],
coords[i + 1],
coords[i + 2],
coords[i + 3]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 4], coords[i + 5]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'c':
for (int i = 0; i < length; i += 6)
{
seg = new SvgPathSegCurvetoCubicRel(
coords[i + 4],
coords[i + 5],
coords[i],
coords[i + 1],
coords[i + 2],
coords[i + 3]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 4] + startPoint.X, coords[i + 5] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'S':
for (int i = 0; i < length; i += 4)
{
seg = new SvgPathSegCurvetoCubicSmoothAbs(
coords[i + 2],
coords[i + 3],
coords[i],
coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 2], coords[i + 3]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 's':
for (int i = 0; i < length; i += 4)
{
seg = new SvgPathSegCurvetoCubicSmoothRel(
coords[i + 2],
coords[i + 3],
coords[i],
coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 2] + startPoint.X, coords[i + 3] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'Q':
for (int i = 0; i < length; i += 4)
{
seg = new SvgPathSegCurvetoQuadraticAbs(
coords[i + 2],
coords[i + 3],
coords[i],
coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 2], coords[i + 3]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'q':
for (int i = 0; i < length; i += 4)
{
seg = new SvgPathSegCurvetoQuadraticRel(
coords[i + 2],
coords[i + 3],
coords[i],
coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i + 2] + startPoint.X, coords[i + 3] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 'T':
for (int i = 0; i < length; i += 2)
{
seg = new SvgPathSegCurvetoQuadraticSmoothAbs(
coords[i], coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i], coords[i + 1]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
case 't':
for (int i = 0; i < length; i += 2)
{
seg = new SvgPathSegCurvetoQuadraticSmoothRel(
coords[i], coords[i + 1]);
pathList.AppendItem(seg);
_mayHaveCurves = true;
SvgPointF endPoint = new SvgPointF(coords[i] + startPoint.X, coords[i + 1] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
break;
#endregion
#region arcs
case 'A':
case 'a':
for (int i = 0; i < length; i += 7)
{
if (cmd == 'A')
{
seg = new SvgPathSegArcAbs(
coords[i + 5],
coords[i + 6],
coords[i],
coords[i + 1],
coords[i + 2],
(!coords[i + 3].Equals(0)),
(!coords[i + 4].Equals(0)));
SvgPointF endPoint = new SvgPointF(coords[i + 5], coords[i + 6]);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
else
{
seg = new SvgPathSegArcRel(
coords[i + 5],
coords[i + 6],
coords[i],
coords[i + 1],
coords[i + 2],
(!coords[i + 3].Equals(0)),
(!coords[i + 4].Equals(0)));
SvgPointF endPoint = new SvgPointF(coords[i + 5] + startPoint.X, coords[i + 6] + startPoint.Y);
seg.Limits = new SvgPointF[] { startPoint, endPoint };
startPoint = endPoint;
}
pathList.AppendItem(seg);
_mayHaveCurves = true;
}
break;
#endregion
#region close
case 'z':
case 'Z':
closedPath++;
seg = new SvgPathSegClosePath();
pathList.AppendItem(seg);
if (pathList.Count >= 2)
{
SvgPointF endPoint = pathList[0].Limits[0];
seg.Limits = new SvgPointF[] { endPoint, startPoint };
startPoint = endPoint;
}
else
{
seg.Limits = new SvgPointF[] { startPoint, startPoint };
startPoint = new SvgPointF(0, 0);
}
break;
#endregion
#region Unknown path command
default:
throw new ApplicationException(string.Format("Unknown path command - ({0})", cmd));
#endregion
}
}
}
_isClosed = (closedPath == 1);
return(true);
}
public override void HandleAttributeChange(XmlAttribute attribute)
{
if(attribute.NamespaceURI.Length == 0)
{
switch(attribute.LocalName)
{
case "d":
pathSegList = null;
Invalidate();
return;
case "pathLength":
_pathLength = null;
Invalidate();
return;
case "marker-start":
case "marker-mid":
case "marker-end":
// Color.attrib, Paint.attrib
case "color":
case "fill":
case "fill-rule":
case "stroke":
case "stroke-dasharray":
case "stroke-dashoffset":
case "stroke-linecap":
case "stroke-linejoin":
case "stroke-miterlimit":
case "stroke-width":
// Opacity.attrib
case "opacity":
case "stroke-opacity":
case "fill-opacity":
// Graphics.attrib
case "display":
case "image-rendering":
case "shape-rendering":
case "text-rendering":
case "visibility":
Invalidate();
break;
case "transform":
Invalidate();
break;
}
base.HandleAttributeChange(attribute);
}
}
public Geometry CreateGeometry(SvgPathElement element)
{
PathGeometry geometry = new PathGeometry();
string fillRule = element.GetPropertyValue("fill-rule");
string clipRule = element.GetAttribute("clip-rule");
if (!string.IsNullOrWhiteSpace(clipRule) &&
string.Equals(clipRule, "evenodd") || string.Equals(clipRule, "nonzero"))
{
fillRule = clipRule;
}
if (fillRule == "evenodd")
{
geometry.FillRule = FillRule.EvenOdd;
}
else if (fillRule == "nonzero")
{
geometry.FillRule = FillRule.Nonzero;
}
SvgPointF initPoint = new SvgPointF(0, 0);
SvgPointF lastPoint = new SvgPointF(0, 0);
ISvgPathSeg segment = null;
SvgPathSegMoveto pathMoveTo = null;
SvgPathSegLineto pathLineTo = null;
SvgPathSegCurveto pathCurveTo = null;
SvgPathSegArc pathArc = null;
ISvgPathSegList segments = element.PathSegList;
int nElems = segments.NumberOfItems;
PathFigure pathFigure = null;
for (int i = 0; i < nElems; i++)
{
segment = segments.GetItem(i);
if (DynamicCast.Cast(segment, out pathMoveTo))
{
if (pathFigure != null)
{
pathFigure.IsClosed = false;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
pathFigure = null;
}
lastPoint = initPoint = pathMoveTo.AbsXY;
pathFigure = new PathFigure();
pathFigure.StartPoint = new Point(initPoint.ValueX, initPoint.ValueY);
}
else if (DynamicCast.Cast(segment, out pathLineTo))
{
SvgPointF p = pathLineTo.AbsXY;
pathFigure.Segments.Add(new LineSegment(new Point(p.ValueX, p.ValueY), true));
lastPoint = p;
}
else if (DynamicCast.Cast(segment, out pathCurveTo))
{
SvgPointF xy = pathCurveTo.AbsXY;
SvgPointF x1y1 = pathCurveTo.CubicX1Y1;
SvgPointF x2y2 = pathCurveTo.CubicX2Y2;
pathFigure.Segments.Add(new BezierSegment(new Point(x1y1.ValueX, x1y1.ValueY),
new Point(x2y2.ValueX, x2y2.ValueY), new Point(xy.ValueX, xy.ValueY), true));
lastPoint = xy;
}
else if (DynamicCast.Cast(segment, out pathArc))
{
SvgPointF p = pathArc.AbsXY;
if (lastPoint.Equals(p))
{
// If the endpoints (x, y) and (x0, y0) are identical, then this
// is equivalent to omitting the elliptical arc segment entirely.
}
else if (pathArc.R1.Equals(0) || pathArc.R2.Equals(0))
{
// Ensure radii are valid
pathFigure.Segments.Add(new LineSegment(new Point(p.ValueX, p.ValueY), true));
}
else
{
CalculatedArcValues calcValues = pathArc.GetCalculatedArcValues();
pathFigure.Segments.Add(new ArcSegment(new Point(p.ValueX, p.ValueY),
new Size(pathArc.R1, pathArc.R2), pathArc.Angle, pathArc.LargeArcFlag,
pathArc.SweepFlag ? SweepDirection.Clockwise : SweepDirection.Counterclockwise,
true));
}
lastPoint = p;
}
else if (segment is SvgPathSegClosePath)
{
if (pathFigure != null)
{
pathFigure.IsClosed = true;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
pathFigure = null;
}
lastPoint = initPoint;
}
}
if (pathFigure != null)
{
pathFigure.IsClosed = false;
pathFigure.IsFilled = true;
geometry.Figures.Add(pathFigure);
}
return(geometry);
}
public static GraphicsPath CreatePath(SvgPathElement element)
{
GraphicsPath gp = new GraphicsPath();
SvgPointF initPoint = new SvgPointF(0, 0);
SvgPointF lastPoint = new SvgPointF(0, 0);
ISvgPathSeg segment = null;
SvgPathSegMoveto pathMoveTo = null;
SvgPathSegLineto pathLineTo = null;
SvgPathSegCurveto pathCurveTo = null;
SvgPathSegArc pathArc = null;
ISvgPathSegList segments = element.PathSegList;
int nElems = segments.NumberOfItems;
for (int i = 0; i < nElems; i++)
{
segment = segments.GetItem(i);
if (DynamicCast.Cast(segment, out pathMoveTo))
{
//SvgPathSegMoveto seg = (SvgPathSegMoveto)segment;
gp.StartFigure();
lastPoint = initPoint = pathMoveTo.AbsXY;
}
else if (DynamicCast.Cast(segment, out pathLineTo))
{
//SvgPathSegLineto seg = (SvgPathSegLineto)segment;
SvgPointF p = pathLineTo.AbsXY;
gp.AddLine(lastPoint.X, lastPoint.Y, p.X, p.Y);
lastPoint = p;
}
else if (DynamicCast.Cast(segment, out pathCurveTo))
{
// SvgPathSegCurveto seg = (SvgPathSegCurveto)segment;
SvgPointF xy = pathCurveTo.AbsXY;
SvgPointF x1y1 = pathCurveTo.CubicX1Y1;
SvgPointF x2y2 = pathCurveTo.CubicX2Y2;
gp.AddBezier(lastPoint.X, lastPoint.Y, x1y1.X, x1y1.Y, x2y2.X, x2y2.Y, xy.X, xy.Y);
lastPoint = xy;
}
else if (DynamicCast.Cast(segment, out pathArc))
{
//SvgPathSegArc seg = (SvgPathSegArc)segment;
SvgPointF p = pathArc.AbsXY;
if (lastPoint.Equals(p))
{
// If the endpoints (x, y) and (x0, y0) are identical, then this
// is equivalent to omitting the elliptical arc segment entirely.
}
else if (pathArc.R1 == 0 || pathArc.R2 == 0)
{
// Ensure radii are valid
gp.AddLine(lastPoint.X, lastPoint.Y, p.X, p.Y);
}
else
{
CalculatedArcValues calcValues = pathArc.GetCalculatedArcValues();
GraphicsPath gp2 = new GraphicsPath();
gp2.StartFigure();
gp2.AddArc((float)(calcValues.Cx - calcValues.CorrRx),
(float)(calcValues.Cy - calcValues.CorrRy),
(float)calcValues.CorrRx * 2, (float)calcValues.CorrRy * 2,
(float)calcValues.AngleStart, (float)calcValues.AngleExtent);
Matrix matrix = new Matrix();
matrix.Translate(-(float)calcValues.Cx, -(float)calcValues.Cy);
gp2.Transform(matrix);
matrix = new Matrix();
matrix.Rotate((float)pathArc.Angle);
gp2.Transform(matrix);
matrix = new Matrix();
matrix.Translate((float)calcValues.Cx, (float)calcValues.Cy);
gp2.Transform(matrix);
gp.AddPath(gp2, true);
}
lastPoint = p;
}
else if (segment is SvgPathSegClosePath)
{
gp.CloseFigure();
lastPoint = initPoint;
}
}
string fillRule = element.GetPropertyValue("fill-rule");
if (fillRule == "evenodd")
{
gp.FillMode = FillMode.Alternate;
}
else
{
gp.FillMode = FillMode.Winding;
}
return(gp);
}
