From e310343e4acac016f729ab3c14a80a747aa19e89 Mon Sep 17 00:00:00 2001
From: Christian Muehlhaeuser <muesli@gmail.com>
Date: Thu, 12 Dec 2019 23:11:07 +0100
Subject: [PATCH] Support rendering definition lists

---
 elements.go | 27 +++++++++++++++++++++++++++
 gold.go     |  5 ++++-
 style.go    | 11 +++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/elements.go b/elements.go
index 5601044..9b92920 100644
--- a/elements.go
+++ b/elements.go
@@ -299,6 +299,33 @@ func (tr *TermRenderer) NewElement(node ast.Node, source []byte) Element {
 			},
 		}
 
+	// Definition Lists
+	case astext.KindDefinitionList:
+		e := &BlockElement{
+			Block:  &bytes.Buffer{},
+			Style:  cascadeStyle(ctx.blockStack.Current().Style, ctx.style[DefinitionList], true),
+			Margin: true,
+		}
+		return Element{
+			Entering: "\n",
+			Renderer: e,
+			Finisher: e,
+		}
+
+	case astext.KindDefinitionTerm:
+		return Element{
+			Renderer: &BaseElement{
+				Style: ctx.style[DefinitionTerm],
+			},
+		}
+
+	case astext.KindDefinitionDescription:
+		return Element{
+			Renderer: &BaseElement{
+				Style: ctx.style[DefinitionDescription],
+			},
+		}
+
 	// Handled by parents
 	case astext.KindTaskCheckBox:
 		// handled by KindListItem
diff --git a/gold.go b/gold.go
index 2d5885b..ebbfa6f 100644
--- a/gold.go
+++ b/gold.go
@@ -91,7 +91,10 @@ func (tr *TermRenderer) Render(in string) string {
 // RenderBytes returns the markdown rendered into a byte slice.
 func (tr *TermRenderer) RenderBytes(in []byte) []byte {
 	md := goldmark.New(
-		goldmark.WithExtensions(extension.GFM),
+		goldmark.WithExtensions(
+			extension.GFM,
+			extension.DefinitionList,
+		),
 		goldmark.WithParserOptions(
 			parser.WithAutoHeadingID(),
 		),
diff --git a/style.go b/style.go
index 765795b..9159ff3 100644
--- a/style.go
+++ b/style.go
@@ -54,6 +54,11 @@ const (
 	TableBody
 	TableRow
 
+	// Definition Lists
+	DefinitionList
+	DefinitionTerm
+	DefinitionDescription
+
 	// HTML styles
 	HTMLBlock
 	HTMLSpan
@@ -310,6 +315,12 @@ func keyToType(key string) (StyleType, error) {
 		return TableBody, nil
 	case "table_row":
 		return TableRow, nil
+	case "definition_list":
+		return DefinitionList, nil
+	case "definition_term":
+		return DefinitionTerm, nil
+	case "definition_description":
+		return DefinitionDescription, nil
 
 	default:
 		return 0, fmt.Errorf("invalid style element type: %s", key)