adapted control shape rendering

src/core/draw/participant/control.typ

@@ -1,18 +1,19 @@
 #import "/src/cetz.typ": draw
 
-#import "/src/core/utils.typ": normalize-measure
-#import "/src/consts.typ": *
+#import "/src/core/utils.typ": normalize-measure, normalize-units
 
 #let name = "control"
 
 #let render(x, y, p, bottom) = {
-  let m = measure(p.display-name)
+  let m = normalize-measure(p.display-name)
   let style = p.resolved-style
-  let r = CONTROL-HEIGHT / 2
+  let size = normalize-units(style.size)
+  let spacing = normalize-units(style.spacing)
+  let r = size / 2
   let y0 = if bottom {
-    y - m.height / 1pt - SYM-GAP
+    y - m.height - spacing
   } else {
-    y + m.height / 1pt + CONTROL-HEIGHT + SYM-GAP
+    y + m.height + size + spacing
   }
 
   draw.circle(
@@ -22,7 +23,12 @@
     stroke: style.stroke
   )
   let s = stroke(style.stroke)
-  draw.mark((x, y0), (x - r / 2, y0), symbol: "stealth", fill: s.paint)
+  draw.mark(
+    (x, y0), (x - r / 2, y0),
+    symbol: "stealth",
+    fill: s.paint,
+    stroke: s.paint
+  )
   draw.content(
     (x, y),
     p.display-name,
@@ -33,12 +39,16 @@
 #let get-size(par) = {
   let m = normalize-measure(par.display-name)
 
-  // CONTROL-HEIGHT * 1pt
-  // CONTROL-HEIGHT * 1pt + SYM-GAP * 1pt + h
+  let size = normalize-units(par.resolved-style.size)
+  let spacing = normalize-units(par.resolved-style.spacing)
 
-  return m
+  return (
+    width: calc.max(m.width, size),
+    height: size + spacing + m.height
+  )
 }
 
 #let default-style = (
-  :
+  size: 20pt,
+  spacing: 5pt
 )