Fix bug that escaped space not working with Linkfy extension

extension/cjk.go

@@ -2,6 +2,7 @@ package extension
 
 import (
 	"github.com/yuin/goldmark"
+	"github.com/yuin/goldmark/parser"
 	"github.com/yuin/goldmark/renderer/html"
 )
 
@@ -45,5 +46,6 @@ func (e *cjk) Extend(m goldmark.Markdown) {
 	}
 	if e.EscapedSpace {
 		m.Renderer().AddOptions(html.WithWriter(html.NewWriter(html.WithEscapedSpace())))
+		m.Parser().AddOptions(parser.WithEscapedSpace())
 	}
 }

extension/cjk_test.go

@@ -56,6 +56,31 @@ func TestEscapedSpace(t *testing.T) {
 		},
 		t,
 	)
+
+	// ' ' triggers Linkify extension inline parser.
+	// Escaped spaces should not trigger the inline parser.
+
+	markdown = goldmark.New(goldmark.WithRendererOptions(
+		html.WithXHTML(),
+		html.WithUnsafe(),
+	),
+		goldmark.WithExtensions(
+			NewCJK(WithEscapedSpace()),
+			Linkify,
+		),
+	)
+
+	no = 4
+	testutil.DoTestCase(
+		markdown,
+		testutil.MarkdownTestCase{
+			No:          no,
+			Description: "Escaped space and linkfy extension",
+			Markdown:    "太郎は\\ **「こんにちわ」**\\ と言った\nんです",
+			Expected:    "<p>太郎は<strong>「こんにちわ」</strong>と言った\nんです</p>",
+		},
+		t,
+	)
 }
 
 func TestEastAsianLineBreaks(t *testing.T) {

parser/parser.go

@@ -430,6 +430,7 @@ type Config struct {
 	InlineParsers         util.PrioritizedSlice /*<InlineParser>*/
 	ParagraphTransformers util.PrioritizedSlice /*<ParagraphTransformer>*/
 	ASTTransformers       util.PrioritizedSlice /*<ASTTransformer>*/
+	EscapedSpace          bool
 }
 
 // NewConfig returns a new Config.
@@ -635,6 +636,7 @@ type parser struct {
 	closeBlockers         []CloseBlocker
 	paragraphTransformers []ParagraphTransformer
 	astTransformers       []ASTTransformer
+	escapedSpace          bool
 	config                *Config
 	initSync              sync.Once
 }
@@ -695,6 +697,18 @@ func WithASTTransformers(ps ...util.PrioritizedValue) Option {
 	return &withASTTransformers{ps}
 }
 
+type withEscapedSpace struct {
+}
+
+func (o *withEscapedSpace) SetParserOption(c *Config) {
+	c.EscapedSpace = true
+}
+
+// WithEscapedSpace is a functional option indicates that a '\' escaped half-space(0x20) should not trigger parsers.
+func WithEscapedSpace() Option {
+	return &withEscapedSpace{}
+}
+
 type withOption struct {
 	name  OptionName
 	value interface{}
@@ -846,6 +860,7 @@ func (p *parser) Parse(reader text.Reader, opts ...ParseOption) ast.Node {
 		for _, v := range p.config.ASTTransformers {
 			p.addASTTransformer(v, p.config.Options)
 		}
+		p.escapedSpace = p.config.EscapedSpace
 		p.config = nil
 	})
 	c := &ParseConfig{}
@@ -1165,7 +1180,7 @@ func (p *parser) parseBlock(block text.BlockReader, parent ast.Node, pc Context)
 			}
 			isSpace := util.IsSpace(c)
 			isPunct := util.IsPunct(c)
-			if (isPunct && !escaped) || isSpace || i == 0 {
+			if (isPunct && !escaped) || isSpace && !(escaped && p.escapedSpace) || i == 0 {
 				parserChar := c
 				if isSpace || (i == 0 && !isPunct) {
 					parserChar = ' '