private void ApplyRotation(SvgDrawContext context)
{
if (this.attributesAndStyles.ContainsKey(SvgConstants.Attributes.ORIENT))
{
String orient = this.attributesAndStyles.Get(SvgConstants.Attributes.ORIENT);
double rotAngle = double.NaN;
// If placed by marker-start, the marker is oriented 180° different from
// the orientation that would be used if auto was specified.
// For all other markers, auto-start-reverse means the same as auto.
if (SvgConstants.Values.AUTO.Equals(orient) || (SvgConstants.Values.AUTO_START_REVERSE.Equals(orient) && !
SvgConstants.Attributes.MARKER_START.Equals(this.attributesAndStyles.Get(SvgConstants.Tags.MARKER))))
{
rotAngle = ((IMarkerCapable)GetParent()).GetAutoOrientAngle(this, false);
}
else
{
if (SvgConstants.Values.AUTO_START_REVERSE.Equals(orient) && SvgConstants.Attributes.MARKER_START.Equals(this
.attributesAndStyles.Get(SvgConstants.Tags.MARKER)))
{
rotAngle = ((IMarkerCapable)GetParent()).GetAutoOrientAngle(this, true);
}
else
{
if (CssUtils.IsAngleValue(orient) || CssUtils.IsNumericValue(orient))
{
rotAngle = CssUtils.ParseAngle(this.attributesAndStyles.Get(SvgConstants.Attributes.ORIENT));
}
}
}
if (!double.IsNaN(rotAngle))
{
context.GetCurrentCanvas().ConcatMatrix(AffineTransform.GetRotateInstance(rotAngle));
}
}
}
