Lifeline should inherit the stroke style from the actor

Fixes #1137

ci/release/changelogs/next.md

@@ -5,6 +5,7 @@
 #### Improvements 🧹
 
 - Labels on parallel `dagre` connections include a gap between them [#1134](https://github.com/terrastruct/d2/pull/1134)
+- Sequence Diagram `Lifelines` now inherit the Actor `stroke` and `stroke-dash` [#1140](https://github.com/terrastruct/d2/pull/1140)
 
 #### Bugfixes ⛑️
 

d2layouts/d2sequence/sequence_diagram.go

@@ -386,13 +386,19 @@ func (sd *sequenceDiagram) addLifelineEdges() {
 		}
 		actorLifelineEnd := actor.Center()
 		actorLifelineEnd.Y = endY
-		sd.lifelines = append(sd.lifelines, &d2graph.Edge{
+		style := d2graph.Style{
-			Attributes: &d2graph.Attributes{
-				Style: d2graph.Style{
 			StrokeDash:  &d2graph.Scalar{Value: fmt.Sprintf("%d", LIFELINE_STROKE_DASH)},
 			StrokeWidth: &d2graph.Scalar{Value: fmt.Sprintf("%d", LIFELINE_STROKE_WIDTH)},
-				},
+		}
-			},
+		if actor.Attributes.Style.StrokeDash != nil {
+			style.StrokeDash = &d2graph.Scalar{Value: actor.Attributes.Style.StrokeDash.Value}
+		}
+		if actor.Attributes.Style.Stroke != nil {
+			style.Stroke = &d2graph.Scalar{Value: actor.Attributes.Style.Stroke.Value}
+		}
+
+		sd.lifelines = append(sd.lifelines, &d2graph.Edge{
+			Attributes: &d2graph.Attributes{Style: style},
 			Src:        actor,
 			SrcArrow:   false,
 			Dst: &d2graph.Object{

e2etests/stable_test.go

@@ -1487,8 +1487,13 @@ finally: {
     sequence: {
         shape: sequence_diagram
 		# items appear in this order
-        scorer
+        scorer {
-        concept
+					style.stroke: red
+					style.stroke-dash: 2
+				}
+        concept {
+					style.stroke-width: 6
+				}
         essayRubric
         item
         itemOutcome

e2etests/testdata/stable/sequence_diagram_nested_span/dagre/board.exp.json

@@ -1302,7 +1302,7 @@
       "opacity": 1,
       "strokeDash": 6,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,

e2etests/testdata/stable/sequence_diagram_nested_span/elk/board.exp.json

@@ -1302,7 +1302,7 @@
       "opacity": 1,
       "strokeDash": 6,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,

e2etests/testdata/stable/sequence_diagram_simple/dagre/board.exp.json

@@ -621,7 +621,7 @@
       "opacity": 1,
       "strokeDash": 6,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,

e2etests/testdata/stable/sequence_diagram_simple/elk/board.exp.json

@@ -621,7 +621,7 @@
       "opacity": 1,
       "strokeDash": 6,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,

e2etests/testdata/stable/sequence_diagrams/dagre/board.exp.json

@@ -1672,11 +1672,11 @@
       "width": 100,
       "height": 66,
       "opacity": 1,
-      "strokeDash": 0,
+      "strokeDash": 2,
       "strokeWidth": 2,
       "borderRadius": 0,
       "fill": "B5",
-      "stroke": "B1",
+      "stroke": "red",
       "shadow": false,
       "3d": false,
       "multiple": false,
@@ -1714,7 +1714,7 @@
       "height": 66,
       "opacity": 1,
       "strokeDash": 0,
-      "strokeWidth": 2,
+      "strokeWidth": 6,
       "borderRadius": 0,
       "fill": "B5",
       "stroke": "B1",
@@ -4744,9 +4744,9 @@
       "dstArrow": "none",
       "dstLabel": "",
       "opacity": 1,
-      "strokeDash": 6,
+      "strokeDash": 2,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,

e2etests/testdata/stable/sequence_diagrams/elk/board.exp.json

@@ -1672,11 +1672,11 @@
       "width": 100,
       "height": 66,
       "opacity": 1,
-      "strokeDash": 0,
+      "strokeDash": 2,
       "strokeWidth": 2,
       "borderRadius": 0,
       "fill": "B5",
-      "stroke": "B1",
+      "stroke": "red",
       "shadow": false,
       "3d": false,
       "multiple": false,
@@ -1714,7 +1714,7 @@
       "height": 66,
       "opacity": 1,
       "strokeDash": 0,
-      "strokeWidth": 2,
+      "strokeWidth": 6,
       "borderRadius": 0,
       "fill": "B5",
       "stroke": "B1",
@@ -4655,9 +4655,9 @@
       "dstArrow": "none",
       "dstLabel": "",
       "opacity": 1,
-      "strokeDash": 6,
+      "strokeDash": 2,
       "strokeWidth": 2,
-      "stroke": "B2",
+      "stroke": "red",
       "borderRadius": 10,
       "label": "",
       "fontSize": 16,