markup/asciidocext: Add Level to Heading struct

Closes #12291

markup/asciidocext/convert_test.go

@@ -266,7 +266,7 @@ func TestAsciidoctorAttributes(t *testing.T) {
 trace = false
 [markup.asciidocext.attributes]
 my-base-url = "https://gohugo.io/"
-my-attribute-name = "my value" 
+my-attribute-name = "my value"
 `)
 	conf := testconfig.GetTestConfig(nil, cfg)
 	p, err := asciidocext.Provider.New(
@@ -301,7 +301,7 @@ func getProvider(c *qt.C, mConfStr string) converter.Provider {
 	confStr := `
 [security]
 [security.exec]
-allow = ['asciidoctor']  
+allow = ['asciidoctor']
 `
 	confStr += mConfStr
 
@@ -368,6 +368,13 @@ testContent
 	c.Assert(ok, qt.Equals, true)
 
 	c.Assert(toc.TableOfContents().Identifiers, qt.DeepEquals, collections.SortedStringSlice{"_introduction", "_section_1", "_section_1_1", "_section_1_1_1", "_section_1_2", "_section_2"})
+	// Although "Introduction" has a level 3 markup heading, AsciiDoc treats the first heading as level 2.
+	c.Assert(toc.TableOfContents().HeadingsMap["_introduction"].Level, qt.Equals, 2)
+	c.Assert(toc.TableOfContents().HeadingsMap["_section_1"].Level, qt.Equals, 2)
+	c.Assert(toc.TableOfContents().HeadingsMap["_section_1_1"].Level, qt.Equals, 3)
+	c.Assert(toc.TableOfContents().HeadingsMap["_section_1_1_1"].Level, qt.Equals, 4)
+	c.Assert(toc.TableOfContents().HeadingsMap["_section_1_2"].Level, qt.Equals, 3)
+	c.Assert(toc.TableOfContents().HeadingsMap["_section_2"].Level, qt.Equals, 2)
 	c.Assert(string(r.Bytes()), qt.Not(qt.Contains), "<div id=\"toc\" class=\"toc\">")
 }
 

markup/asciidocext/internal/converter.go

@@ -243,6 +243,7 @@ func parseTOC(doc *html.Node) *tableofcontents.Fragments {
 					toc.AddAt(&tableofcontents.Heading{
 						Title: nodeContent(c),
 						ID:    href,
+						Level: level + 1,
 					}, row, level)
 				}
 				f(n.FirstChild, row, level)