/// <summary>
/// performs a translation transform on the diagram in order to push it to the "top-left" corner of the diagram.
/// TODO: might make sense if the scale transform ends up using this as well.
/// </summary>
/// <param name="state"></param>
/// <param name="diagram"></param>
/// <returns></returns>
private static IDiagram NormalizeToTopLeftCorner(SvgDrawState state, IDiagram diagram)
{
var vector =
Vector.FromCoordinates(
diagram.Bounds.TopLeft,
state.Converter.BoundingBox.TopLeft
);
//TODO: once implemented, should this use the more "programmatic" offset approach? (that doesn't rely on the SVG transform?)
return(diagram.WithOffset(vector));
}
public static State <SvgDrawState, IEnumerable <XAttribute> > GenerateStyleAttributes(IStyleProperty styleProperty)
{
if (styleProperty is FillProperty fillProperty)
{
return(new[]
{
new XAttribute("fill", SvgColor(fillProperty.FillColor)),
new XAttribute("fill-opacity", SvgOpacity(fillProperty.FillColor)),
}
.Pipe(State.Return <SvgDrawState, IEnumerable <XAttribute> >));
}
if (styleProperty is GradientFillProperty gradientFillProperty)
{
var gradientState = State.Return <SvgDrawState, XElementBuilder>(() => BuildGradientElement(gradientFillProperty.Gradient));
return
(from id in SvgDrawState.IncludeDefinition(gradientFillProperty.Gradient, gradientState)
select new[] { new XAttribute("fill", $"url(#{id})") }.AsEnumerable());
}
if (styleProperty is FillPatternProperty fillPatternProperty)
{
var patternFactory = RenderPattern(fillPatternProperty.PatternDiagram, fillPatternProperty.FillWidthRatio, fillPatternProperty.FillHeightRatio);
return
(from id in SvgDrawState.IncludeDefinition(fillPatternProperty, patternFactory)
select new[] { new XAttribute("fill", $"url(#{id})") }.AsEnumerable());
}
if (styleProperty is FilterProperty filterProperty)
{
var filterFactory =
from drawState in State.Get <SvgDrawState>()
select SvgFilterFactory.BuildFilter(filterProperty.FilterComponent, drawState.Converter);
return
(from id in SvgDrawState.IncludeDefinition(filterProperty, filterFactory)
select new[] { new XAttribute("filter", $"url(#{id})") }.AsEnumerable());
}
if (styleProperty is StrokeColorProperty strokeColorProperty)
{
return
(new[]
{
new XAttribute("stroke", SvgColor(strokeColorProperty.Color)),
new XAttribute("stroke-opacity", SvgOpacity(strokeColorProperty.Color))
}
.AsEnumerable()
.Pipe(State.Return <SvgDrawState, IEnumerable <XAttribute> >));
}
if (styleProperty is StrokeWidthProperty strokeWidthProperty)
{
return
(from state in State.Get <SvgDrawState>()
let svgStrokeWidth = CalculateStrokeWidth(strokeWidthProperty.StrokeWidth, state.Converter)
select new[]
{
new XAttribute("stroke-width", svgStrokeWidth)
}.AsEnumerable());
}
throw new Exception($"unable to render fill type of style property {styleProperty.GetType()}");
}
){kind=link}