From 37269b47b5744eef6944badd77e8750a333648f1 Mon Sep 17 00:00:00 2001
From: Anthony Juckel <ajuckel@gmail.com>
Date: Sun, 2 Mar 2025 21:26:43 -0600
Subject: [PATCH] Default to markdown for nodes from metadata

---
 packages/mermaid/src/diagrams/flowchart/flowDb.ts | 12 ++++++++++++
 packages/mermaid/src/diagrams/flowchart/types.ts  |  4 ++--
 packages/mermaid/src/types.ts                     |  1 +
 3 files changed, 15 insertions(+), 2 deletions(-)

diff --git a/packages/mermaid/src/diagrams/flowchart/flowDb.ts b/packages/mermaid/src/diagrams/flowchart/flowDb.ts
index 190312c7f..e2ccca412 100644
--- a/packages/mermaid/src/diagrams/flowchart/flowDb.ts
+++ b/packages/mermaid/src/diagrams/flowchart/flowDb.ts
@@ -85,6 +85,17 @@ export class FlowDB implements DiagramDB {
     return common.sanitizeText(txt, this.config);
   }
 
+  private sanitizeNodeLabelType(labelType: string) {
+    switch (labelType) {
+      case 'markdown':
+      case 'string':
+      case 'text':
+        return labelType;
+      default:
+        return 'markdown';
+    }
+  }
+
   /**
    * Function to lookup domId from id in the graph definition.
    *
@@ -208,6 +219,7 @@ export class FlowDB implements DiagramDB {
 
       if (doc?.label) {
         vertex.text = doc?.label;
+        vertex.labelType = this.sanitizeNodeLabelType(doc?.labelType ?? 'markdown');
       }
       if (doc?.icon) {
         vertex.icon = doc?.icon;
diff --git a/packages/mermaid/src/diagrams/flowchart/types.ts b/packages/mermaid/src/diagrams/flowchart/types.ts
index 54156091b..ac2d04015 100644
--- a/packages/mermaid/src/diagrams/flowchart/types.ts
+++ b/packages/mermaid/src/diagrams/flowchart/types.ts
@@ -29,7 +29,7 @@ export interface FlowVertex {
   domId: string;
   haveCallback?: boolean;
   id: string;
-  labelType: 'text';
+  labelType: 'markdown' | 'string' | 'text';
   link?: string;
   linkTarget?: string;
   props?: any;
@@ -62,7 +62,7 @@ export interface FlowEdge {
   style?: string[];
   length?: number;
   text: string;
-  labelType: 'text';
+  labelType: 'markdown' | 'string' | 'text';
   classes: string[];
   id?: string;
   animation?: 'fast' | 'slow';
diff --git a/packages/mermaid/src/types.ts b/packages/mermaid/src/types.ts
index d1394e71b..8402aa576 100644
--- a/packages/mermaid/src/types.ts
+++ b/packages/mermaid/src/types.ts
@@ -1,6 +1,7 @@
 export interface NodeMetaData {
   shape?: string;
   label?: string;
+  labelType?: string;
   icon?: string;
   form?: string;
   pos?: 't' | 'b';