Closes #41

extension/linkify.go

@@ -132,11 +132,53 @@ func (s *linkifyParser) CloseBlock(parent ast.Node, pc parser.Context) {
 type linkify struct {
 }
 
+type linkifyASTTransformer struct {
+}
+
+var defaultLinkifyASTTransformer = &linkifyASTTransformer{}
+
+// NewLinkifyASTTransformer returns a new parser.ASTTransformer that
+// is related to AutoLink.
+func NewLinkifyASTTransformer() parser.ASTTransformer {
+	return defaultLinkifyASTTransformer
+}
+
+func (a *linkifyASTTransformer) Transform(node *ast.Document, reader text.Reader, pc parser.Context) {
+	var autoLinks []*ast.AutoLink
+	_ = ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
+		if entering {
+			if autoLink, ok := n.(*ast.AutoLink); ok {
+				autoLinks = append(autoLinks, autoLink)
+			}
+		}
+		return ast.WalkContinue, nil
+
+	})
+	for _, autoLink := range autoLinks {
+		nested := false
+		for p := autoLink.Parent(); p != nil; p = p.Parent() {
+			if _, ok := p.(*ast.Link); ok {
+				nested = true
+				break
+			}
+		}
+		if nested {
+			parent := autoLink.Parent()
+			parent.ReplaceChild(parent, autoLink, ast.NewString(autoLink.Label(reader.Source())))
+		}
+	}
+}
+
 // Linkify is an extension that allow you to parse text that seems like a URL.
 var Linkify = &linkify{}
 
 func (e *linkify) Extend(m goldmark.Markdown) {
-	m.Parser().AddOptions(parser.WithInlineParsers(
+	m.Parser().AddOptions(
+		parser.WithInlineParsers(
 			util.Prioritized(NewLinkifyParser(), 999),
-	))
+		),
+		parser.WithASTTransformers(
+			util.Prioritized(NewLinkifyASTTransformer(), 999),
+		),
+	)
 }

extension/linkify_test.go

@@ -4,8 +4,8 @@ import (
 	"testing"
 
 	"github.com/yuin/goldmark"
-	"github.com/yuin/goldmark/testutil"
 	"github.com/yuin/goldmark/renderer/html"
+	"github.com/yuin/goldmark/testutil"
 )
 
 func TestLinkify(t *testing.T) {