add arrow on stub

src/wire.typ

@@ -19,7 +19,7 @@
 #let get-direct-wire(pts) = {
   let anchors = (
     "start": pts.first(),
-    "end": pts.last()
+    "end": pts.last(),
   )
   return (pts, anchors)
 }
@@ -38,21 +38,21 @@
       start,
       (horizontal: mid, vertical: ()),
       (horizontal: (), vertical: end),
-      end
+      end,
     )
   } else {
     (
       start,
       (horizontal: (), vertical: mid),
       (horizontal: end, vertical: ()),
-      end
+      end,
     )
   }
   let anchors = (
     "start": start,
     "zig": points.at(1),
     "zag": points.at(2),
-    "end": end
+    "end": end,
   )
   return (points, anchors)
 }
@@ -65,7 +65,7 @@
 
   let p1 = (start, margin-start, end)
   let p2 = (end, margin-end, start)
-  
+
   let (ctx, p0) = coordinate.resolve(ctx, start)
   let (ctx, p3) = coordinate.resolve(ctx, end)
   p0 = (x: p0.first(), y: p0.last())
@@ -73,7 +73,7 @@
 
   let dx1 = margin-start
   let dx2 = margin-end
-  
+
   if type(margin-start) == ratio {
     dx1 = calc.abs(p3.x - p0.x) * margin-start / 100%
   }
@@ -95,7 +95,7 @@
     (horizontal: (), vertical: (0, dodge-y)),
     (horizontal: p2, vertical: ()),
     (horizontal: (), vertical: end),
-    end
+    end,
   )
   let anchors = (
     "start": start,
@@ -103,7 +103,7 @@
     "dodge-start": points.at(2),
     "dodge-end": points.at(3),
     "end2": points.at(4),
-    "end": end
+    "end": end,
   )
 
   return (points, anchors)
@@ -128,7 +128,8 @@
 /// - dodge-sides (array): The start and end sides (going out of the connected element) of the wire (only with style "dodge")
 /// - dodge-margins (array): The start and end margins (i.e. space before dodging) of the wire (only with style "dodge")
 #let wire(
-  id, pts,
+  id,
+  pts,
   bus: false,
   name: none,
   name-pos: "middle",
@@ -143,7 +144,7 @@
   zigzag-dir: "vertical",
   dodge-y: 0,
   dodge-sides: ("east", "west"),
-  dodge-margins: (5%, 5%)
+  dodge-margins: (5%, 5%),
 ) = draw.get-ctx(ctx => {
   if not style in wire-styles {
     panic("Invalid wire style '" + style + "'")
@@ -152,10 +153,14 @@
   if pts.len() != 2 {
     panic("Wrong number of points (got " + str(pts.len()) + " instead of 2)")
   }
-  
+
   let stroke = (
     paint: color,
-    thickness: if bus {bus-width} else {signal-width}
+    thickness: if bus {
+      bus-width
+    } else {
+      signal-width
+    },
   )
   if dashed {
     stroke.insert("dash", "dashed")
@@ -166,17 +171,17 @@
 
   if style == "direct" {
     (points, anchors) = get-direct-wire(pts)
-    
+
   } else if style == "zigzag" {
     (points, anchors) = get-zigzag-wire(pts, zigzag-ratio, zigzag-dir)
-    
+
   } else if style == "dodge" {
     (points, anchors) = get-dodge-wire(
       pts,
       dodge-y,
       dodge-margins,
       dodge-sides,
-      ctx
+      ctx,
     )
   }
 
@@ -184,12 +189,15 @@
   if directed {
     mark = (end: ">", fill: color)
   }
-  draw.group(name: id, {
+  draw.group(
-    draw.line(..points, stroke: stroke, mark: mark)
+    name: id,
-    for (anchor-name, anchor-pos) in anchors {
+    {
-      draw.anchor(anchor-name, anchor-pos)
+      draw.line(..points, stroke: stroke, mark: mark)
-    }
+      for (anchor-name, anchor-pos) in anchors {
-  })
+        draw.anchor(anchor-name, anchor-pos)
+      }
+    },
+  )
 
   let first-pt = id + ".start"
   let last-pt = id + ".end"
@@ -198,12 +206,12 @@
   if reverse {
     (first-pt, last-pt) = (last-pt, first-pt)
   }
-  
+
   let angle = 0deg
   if rotate-name {
     (ctx, first-pos) = coordinate.resolve(ctx, first-pos)
     (ctx, second-pos) = coordinate.resolve(ctx, second-pos)
-    
+
     if reverse {
       (first-pos, second-pos) = (second-pos, first-pos)
     }
@@ -211,24 +219,24 @@
     let (x2, y2, ..) = second-pos
     angle = calc.atan2(x2 - x1, y2 - y1)
   }
-  
+
   if name != none {
     let names = ()
-    
+
-    if type(name) == str {
+    if type(name) == str or type(name) == content {
       names = ((name, name-pos),)
-      
+
     } else if type(name) == array {
       names = (
         (name.at(0), "start"),
-        (name.at(1), "end")
+        (name.at(1), "end"),
       )
     }
 
     for (name, pos) in names {
       let point
       let anchor
-      
+
       if pos == "middle" {
         point = (first-pt, 50%, last-pt)
         anchor = "south"
@@ -248,12 +256,12 @@
 
   if slice != none {
     let slice-txt = "[" + slice.map(b => str(b)).join(":") + "]"
-    
+
     draw.content(
       first-pt,
       anchor: "south-west",
       padding: 3pt,
-      text(slice-txt, size: 0.75em)
+      text(slice-txt, size: 0.75em),
     )
   }
 })
@@ -267,24 +275,38 @@
 /// - vertical (bool): Whether the name should be displayed vertically
 /// - length (number): The length of the stub
 /// - name-offset (number): The name offset, perpendicular to the stub
-#let stub(port-id, side, name: none, vertical: false, length: 1em, name-offset: 0) = {
+#let stub(
+  port-id,
+  side,
+  name: none,
+  vertical: false,
+  length: 1em,
+  name-offset: 0,
+  color: black,
+  directed: none,
+) = {
   let end-offset = (
     north: (0, length),
     east: (length, 0),
     south: (0, -length),
-    west: (-length, 0)
+    west: (-length, 0),
   ).at(side)
-  
+
   let name-offset = (
     north: (name-offset, length),
     east: (length, name-offset),
     south: (name-offset, -length),
-    west: (-length, name-offset)
+    west: (-length, name-offset),
   ).at(side)
 
+  let mark = (fill: color)
+  if directed != none {
+    mark = ((directed): ">", fill: color)
+  }
   draw.line(
     port-id,
-    (rel: end-offset, to: port-id)
+    (rel: end-offset, to: port-id),
+    mark: mark,
   )
   if name != none {
     let text-anchor = if vertical {
@@ -292,15 +314,21 @@
         "north": "west",
         "south": "east",
         "west": "south",
-        "east": "north"
+        "east": "north",
       ).at(side)
-    } else { opposite-anchor(side) }
+    } else {
+      opposite-anchor(side)
+    }
     draw.content(
       anchor: text-anchor,
       padding: 0.2em,
-      angle: if vertical {90deg} else {0deg},
+      angle: if vertical {
+        90deg
+      } else {
+        0deg
+      },
       (rel: name-offset, to: port-id),
-      name
+      name,
     )
   }
 }