TNode NodeFor(Wg.IGeometrySource2D obj) => _graph[obj].Canonical;
TC CanonicalObject <TC>(Wg.IGeometrySource2D obj) => (TC)NodeFor(obj).Object;
CanvasGeometry GetCanvasGeometry(Wg.IGeometrySource2D obj)
{
if (GetExistingCanvasGeometry((CanvasGeometry)obj, out CanvasGeometry result))
{
return(result);
}
var canvasGeometry = (CanvasGeometry)obj;
switch (canvasGeometry.Type)
{
case CanvasGeometry.GeometryType.Combination:
{
var combination = (CanvasGeometry.Combination)canvasGeometry;
result = GetCanvasGeometry(combination.A).CombineWith(
GetCanvasGeometry(combination.B),
combination.Matrix,
combination.CombineMode);
break;
}
case CanvasGeometry.GeometryType.Ellipse:
var ellipse = (CanvasGeometry.Ellipse)canvasGeometry;
result = CanvasGeometry.CreateEllipse(
null,
ellipse.X,
ellipse.Y,
ellipse.RadiusX,
ellipse.RadiusY);
break;
case CanvasGeometry.GeometryType.Group:
var group = (CanvasGeometry.Group)canvasGeometry;
var geometries = group.Geometries.Select(g => GetCanvasGeometry(g)).ToArray();
result = CanvasGeometry.CreateGroup(null, geometries, group.FilledRegionDetermination);
break;
case CanvasGeometry.GeometryType.Path:
using (var builder = new CanvasPathBuilder(null))
{
var path = (CanvasGeometry.Path)canvasGeometry;
if (path.FilledRegionDetermination != CanvasFilledRegionDetermination.Alternate)
{
builder.SetFilledRegionDetermination(path.FilledRegionDetermination);
}
foreach (var command in path.Commands)
{
switch (command.Type)
{
case CanvasPathBuilder.CommandType.BeginFigure:
builder.BeginFigure(((CanvasPathBuilder.Command.BeginFigure)command).StartPoint);
break;
case CanvasPathBuilder.CommandType.EndFigure:
builder.EndFigure(((CanvasPathBuilder.Command.EndFigure)command).FigureLoop);
break;
case CanvasPathBuilder.CommandType.AddLine:
builder.AddLine(((CanvasPathBuilder.Command.AddLine)command).EndPoint);
break;
case CanvasPathBuilder.CommandType.AddCubicBezier:
var cb = (CanvasPathBuilder.Command.AddCubicBezier)command;
builder.AddCubicBezier(cb.ControlPoint1, cb.ControlPoint2, cb.EndPoint);
break;
default:
throw new InvalidOperationException();
}
}
result = CanvasGeometry.CreatePath(builder);
}
break;
case CanvasGeometry.GeometryType.RoundedRectangle:
var roundedRectangle = (CanvasGeometry.RoundedRectangle)canvasGeometry;
result = CanvasGeometry.CreateRoundedRectangle(
null,
roundedRectangle.X,
roundedRectangle.Y,
roundedRectangle.W,
roundedRectangle.H,
roundedRectangle.RadiusX,
roundedRectangle.RadiusY);
break;
case CanvasGeometry.GeometryType.TransformedGeometry:
var transformedGeometry = (CanvasGeometry.TransformedGeometry)canvasGeometry;
result = GetCanvasGeometry(transformedGeometry.SourceGeometry).Transform(transformedGeometry.TransformMatrix);
break;
default:
throw new InvalidOperationException();
}
InitializeIDescribable(canvasGeometry, result);
CacheCanvasGeometry(canvasGeometry, result);
return(result);
}
