From 358a53d815dd563afa25af8fb39a24247c50be4e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?J=C3=BAlio=20C=C3=A9sar=20Batista?= <julio@terrastruct.com>
Date: Mon, 5 Dec 2022 13:32:33 -0800
Subject: [PATCH] Mask only labels in sequence diagram groups

---
 d2exporter/export.go                     | 3 +++
 d2graph/d2graph.go                       | 1 +
 d2layouts/d2sequence/sequence_diagram.go | 1 +
 d2renderers/d2svg/d2svg.go               | 4 +++-
 d2target/d2target.go                     | 1 +
 5 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/d2exporter/export.go b/d2exporter/export.go
index c65542362..7d9dd313b 100644
--- a/d2exporter/export.go
+++ b/d2exporter/export.go
@@ -127,6 +127,9 @@ func toShape(obj *d2graph.Object, theme *d2themes.Theme) d2target.Shape {
 	if obj.LabelPosition != nil {
 		shape.LabelPosition = *obj.LabelPosition
 	}
+	if obj.MaskLabel != nil {
+		shape.MaskLabel = *obj.MaskLabel
+	}
 
 	shape.Tooltip = obj.Attributes.Tooltip
 	shape.Link = obj.Attributes.Link
diff --git a/d2graph/d2graph.go b/d2graph/d2graph.go
index 18cb4b236..448ca8ff6 100644
--- a/d2graph/d2graph.go
+++ b/d2graph/d2graph.go
@@ -69,6 +69,7 @@ type Object struct {
 	References      []Reference             `json:"references,omitempty"`
 
 	*geo.Box      `json:"box,omitempty"`
+	MaskLabel     *bool   `json:"maskLabel,omitempty"`
 	LabelPosition *string `json:"labelPosition,omitempty"`
 	LabelWidth    *int    `json:"labelWidth,omitempty"`
 	LabelHeight   *int    `json:"labelHeight,omitempty"`
diff --git a/d2layouts/d2sequence/sequence_diagram.go b/d2layouts/d2sequence/sequence_diagram.go
index feedea323..942b08b65 100644
--- a/d2layouts/d2sequence/sequence_diagram.go
+++ b/d2layouts/d2sequence/sequence_diagram.go
@@ -198,6 +198,7 @@ func (sd *sequenceDiagram) placeGroups() {
 	})
 	for _, group := range sd.groups {
 		group.ZIndex = GROUP_Z_INDEX
+		group.MaskLabel = go2.Pointer(true)
 		sd.placeGroup(group)
 	}
 }
diff --git a/d2renderers/d2svg/d2svg.go b/d2renderers/d2svg/d2svg.go
index 376d19464..38cd1d304 100644
--- a/d2renderers/d2svg/d2svg.go
+++ b/d2renderers/d2svg/d2svg.go
@@ -782,7 +782,9 @@ func drawShape(writer io.Writer, targetShape d2target.Shape) (labelMask string,
 				textStyle,
 				renderText(targetShape.Label, x, float64(targetShape.LabelHeight)),
 			)
-			labelMask = makeLabelMask(labelTL, targetShape.LabelWidth, targetShape.LabelHeight-d2graph.INNER_LABEL_PADDING)
+			if targetShape.MaskLabel {
+				labelMask = makeLabelMask(labelTL, targetShape.LabelWidth, targetShape.LabelHeight-d2graph.INNER_LABEL_PADDING)
+			}
 		}
 	}
 	fmt.Fprintf(writer, `</g>`)
diff --git a/d2target/d2target.go b/d2target/d2target.go
index f8c0ff0cc..fe0c7bb3d 100644
--- a/d2target/d2target.go
+++ b/d2target/d2target.go
@@ -121,6 +121,7 @@ type Shape struct {
 	Text
 
 	LabelPosition string `json:"labelPosition,omitempty"`
+	MaskLabel     bool   `json:"maskLabel"`
 
 	ZIndex int `json:"zIndex"`
 	Level  int `json:"level"`