Add support for setting label stroke

[LordBaryhobal]

It would be great to be able to set the stroke on edge labels, especially the color

I've not used this package for very long, but as I understand it, the labels are drawn in the following function:

typst-fletcher/src/draw.typ

Lines 79 to 104 in b28beb9

 #let draw-edge-label(edge, label-pos, debug: 0) = { 
 	cetz.draw.content( 
 		label-pos, 
 		box( 
 			// cetz seems to sometimes squash the content, causing a line- 
 			// break, when padding is present... 
 			fill: edge.label-fill, 
 			stroke: if debug >= 2 { DEBUG_COLOR + 0.25pt }, 
 			radius: .2em, 
 			pad(.2em)[#edge.label], 
 		), 
 		padding: .2em, 
 		anchor: if edge.label-anchor != auto { edge.label-anchor }, 
 	) 
  
 	if debug >= 2 { 
 		cetz.draw.circle( 
 			label-pos, 
 			radius: 0.75pt, 
 			stroke: none, 
 			fill: DEBUG_COLOR, 
 		) 
 	} 
  
  
 } 

Simply adding a label-stroke to the edge dictionary and changing the function like so should do the trick I believe

#let draw-edge-label(edge, label-pos, debug: 0) = {
	cetz.draw.content(
		label-pos,
		box(
			// cetz seems to sometimes squash the content, causing a line-
			// break, when padding is present...
			fill: edge.label-fill,
			stroke: if debug >= 2 { DEBUG_COLOR + 0.25pt } else { edge.label-stroke },
			radius: .2em,
			pad(.2em)[#edge.label],
		),
		padding: .2em,
		anchor: if edge.label-anchor != auto { edge.label-anchor },
	)

	if debug >= 2 {
		cetz.draw.circle(
			label-pos,
			radius: 0.75pt,
			stroke: none,
			fill: DEBUG_COLOR,
		)
	}
}

It could also default to the edge's stroke

[Joseph Wilson]

That's a good point; everything about the label style except the background fill (indent, rounded corners) is still hard coded.

In the mean time you can probably get what you want by wrapping the label in a box() with the desired stroke style, and in pad() to adjust the indent.

But I agree, we should add this

[Joseph Wilson]

There is now a label-wrapper option to control this.