Method Style

svg/node.go:315–345

Standard Node infrastructure Style styles the Paint values directly from node properties

(sv *SVG)

// Style styles the Paint values directly from node properties
func (g *NodeBase) Style(sv *SVG) {
	pc := &g.Paint
	pc.Defaults()
	ctxt := colors.Context(sv)
	pc.StyleSet = false // this is always first call, restart

	var parCSSAgg map[string]any
	if g.Parent != nil { // && g.Par != sv.Root.This
		pn := g.Parent.(Node)
		parCSSAgg = pn.AsNodeBase().CSSAgg
		pp := pn.AsNodeBase().PaintStyle()
		pc.CopyStyleFrom(pp)
		pc.SetStyleProperties(pp, g.Properties, ctxt)
	} else {
		pc.SetStyleProperties(nil, g.Properties, ctxt)
	}
	pc.ToDotsImpl(&pc.UnitContext) // we always inherit parent's unit context -- SVG sets it once-and-for-all

	if parCSSAgg != nil {
		AggCSS(&g.CSSAgg, parCSSAgg)
	} else {
		g.CSSAgg = nil
	}
	AggCSS(&g.CSSAgg, g.CSS)
	g.StyleCSS(sv, g.CSSAgg)

	pc.StrokeStyle.Opacity *= pc.FontStyle.Opacity // applies to all
	pc.FillStyle.Opacity *= pc.FontStyle.Opacity

	pc.Off = !pc.Display || (pc.StrokeStyle.Color == nil && pc.FillStyle.Color == nil)
}

// AggCSS aggregates css properties
func AggCSS(agg *map[string]any, css map[string]any) {