3 files changed, 25 insertions, 44 deletions
diff --git a/cnmfmt/cnmfmt.go b/cnmfmt/cnmfmt.go
index cb8dc64..fa2ec65 100644
--- a/cnmfmt/cnmfmt.go
+++ b/cnmfmt/cnmfmt.go
@@ -199,7 +199,7 @@ func (t Text) WriteIndent(w io.Writer, n int) error {
 		si = cleanupTags(state[:], order, span.Format)
 		format = span.Format
 	}
-	return writeIndent(w, strings.Join(line, ""), n)
+	return cnm.WriteIndent(w, strings.Join(line, ""), n)
 }
 
 func tagOrder(state []byte, old, new Format) []byte {
@@ -430,7 +430,7 @@ func NewTextFmtBlock(paragraphs []Text) *cnm.TextBlock {
 func (tf TextFmtContents) WriteIndent(w io.Writer, n int) error {
 	for i, p := range tf.Paragraphs {
 		if i != 0 {
-			if err := writeIndent(w, "", 0); err != nil {
+			if err := cnm.WriteIndent(w, "", 0); err != nil {
 				return err
 			}
 		}
@@ -469,29 +469,6 @@ func Parse(paragraphs string) []Text {
 	return txt
 }
 
-func writeIndent(w io.Writer, s string, depth int) error {
-	const tabs = "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
-
-	if s == "" {
-		_, err := w.Write([]byte{'\n'})
-		return err
-	}
-	if depth == 0 {
-		_, err := w.Write([]byte(s + "\n"))
-		return err
-	}
-
-	var ind string
-	if depth <= len(tabs) {
-		ind = tabs[:depth]
-	} else {
-		ind = strings.Repeat("\t", depth)
-	}
-	_, err := w.Write([]byte(ind + s + "\n"))
-	return err
-
-}
-
 func parseTextFmt(p *cnm.Parser, block *cnm.TokenBlock) (cnm.TextContents, error) {
 	txt := TextFmtContents{}
 	var paragraph []string
diff --git a/content.go b/content.go
index c2ba347..6a728f5 100644
--- a/content.go
+++ b/content.go
@@ -41,7 +41,7 @@ type ContentBlock struct {
 func (cb *ContentBlock) WriteIndent(w io.Writer, n int) error {
 	ss := []string{Escape(cb.name)}
 	ss = append(ss, cb.args...)
-	if err := writeIndent(w, JoinEscape(ss), n); err != nil {
+	if err := WriteIndent(w, JoinEscape(ss), n); err != nil {
 		return err
 	}
 	for _, ch := range cb.children {
@@ -169,7 +169,7 @@ func (t *TextBlock) WriteIndent(w io.Writer, n int) error {
 	if t.Format != "" {
 		s += " " + Escape(t.Format)
 	}
-	if err := writeIndent(w, s, n); err != nil {
+	if err := WriteIndent(w, s, n); err != nil {
 		return err
 	}
 	if err := t.Contents.WriteIndent(w, n+1); err != nil {
@@ -237,11 +237,11 @@ type TextPlainContents struct {
 func (t TextPlainContents) WriteIndent(w io.Writer, n int) error {
 	for i, p := range t.Paragraphs {
 		if i != 0 {
-			if err := writeIndent(w, "", 0); err != nil {
+			if err := WriteIndent(w, "", 0); err != nil {
 				return err
 			}
 		}
-		if err := writeIndent(w, Escape(p), n); err != nil {
+		if err := WriteIndent(w, Escape(p), n); err != nil {
 			return err
 		}
 	}
@@ -299,7 +299,7 @@ type TextPreContents struct {
 func (t TextPreContents) WriteIndent(w io.Writer, n int) error {
 	ss := strings.Split(t.Text, "\n")
 	for _, s := range ss {
-		if err := writeIndent(w, EscapeNonspace(s), n); err != nil {
+		if err := WriteIndent(w, EscapeNonspace(s), n); err != nil {
 			return err
 		}
 	}
@@ -335,7 +335,7 @@ func parseTextPre(p *Parser, block *TokenBlock) (TextContents, error) {
 	return TextPreContents{strings.Join(lines, "\n")}, err
 }
 
-// TextRawContents represents raw (unesacped) contents of a text or raw block.
+// TextRawContents represents raw contents of a text or raw block.
 type TextRawContents struct {
 	// Text is the raw content.
 	Text string
@@ -345,7 +345,7 @@ type TextRawContents struct {
 func (t TextRawContents) WriteIndent(w io.Writer, n int) error {
 	ss := strings.Split(t.Text, "\n")
 	for _, s := range ss {
-		if err := writeIndent(w, s, n); err != nil {
+		if err := WriteIndent(w, s, n); err != nil {
 			return err
 		}
 	}
@@ -408,7 +408,7 @@ func (r *RawBlock) WriteIndent(w io.Writer, n int) error {
 	if r.Syntax != "" {
 		s += " " + Escape(r.Syntax)
 	}
-	if err := writeIndent(w, s, n); err != nil {
+	if err := WriteIndent(w, s, n); err != nil {
 		return err
 	}
 	r.Contents.WriteIndent(w, n+1)
@@ -487,7 +487,7 @@ func (t *TableBlock) Args() []string {
 
 // WriteIndent writes the table header and contents indented by n tabs.
 func (t *TableBlock) WriteIndent(w io.Writer, n int) error {
-	if err := writeIndent(w, t.Name(), n); err != nil {
+	if err := WriteIndent(w, t.Name(), n); err != nil {
 		return err
 	}
 	for _, row := range t.rows {
@@ -620,10 +620,10 @@ func (e *EmbedBlock) WriteIndent(w io.Writer, n int) error {
 		s += Escape(e.Type)
 	}
 	s += " " + Escape(e.URL)
-	if err := writeIndent(w, s, n); err != nil {
+	if err := WriteIndent(w, s, n); err != nil {
 		return err
 	}
-	if err := writeIndent(w, Escape(e.Description), n+1); err != nil {
+	if err := WriteIndent(w, Escape(e.Description), n+1); err != nil {
 		return err
 	}
 	return nil
diff --git a/document.go b/document.go
index 5137b80..c01837c 100644
--- a/document.go
+++ b/document.go
@@ -87,15 +87,15 @@ func (doc *Document) WriteIndent(w io.Writer, n int) error {
 func (doc *Document) Write(w io.Writer) error {
 	bw := bufio.NewWriter(w)
 	if doc.Title != "" {
-		if err := writeIndent(bw, "title", 0); err != nil {
+		if err := WriteIndent(bw, "title", 0); err != nil {
 			return err
 		}
-		if err := writeIndent(bw, Escape(doc.Title), 1); err != nil {
+		if err := WriteIndent(bw, Escape(doc.Title), 1); err != nil {
 			return err
 		}
 	}
 	if len(doc.Links) > 0 {
-		if err := writeIndent(bw, "links", 0); err != nil {
+		if err := WriteIndent(bw, "links", 0); err != nil {
 			return err
 		}
 		for _, link := range doc.Links {
@@ -105,7 +105,7 @@ func (doc *Document) Write(w io.Writer) error {
 		}
 	}
 	if len(doc.Site.Children) > 0 {
-		if err := writeIndent(bw, "site", 0); err != nil {
+		if err := WriteIndent(bw, "site", 0); err != nil {
 			return err
 		}
 		for _, site := range doc.Site.Children {
@@ -196,11 +196,11 @@ func (link Link) WriteIndent(w io.Writer, n int) error {
 	if link.Name != "" {
 		s += " " + Escape(link.Name)
 	}
-	if err := writeIndent(w, s, n); err != nil {
+	if err := WriteIndent(w, s, n); err != nil {
 		return err
 	}
 	if link.Description != "" {
-		if err := writeIndent(w, Escape(link.Description), n+1); err != nil {
+		if err := WriteIndent(w, Escape(link.Description), n+1); err != nil {
 			return err
 		}
 	}
@@ -225,7 +225,7 @@ func (site Site) WriteIndent(w io.Writer, n int) error {
 	if site.Name != "" {
 		s += " " + Escape(site.Name)
 	}
-	if err := writeIndent(w, s, n); err != nil {
+	if err := WriteIndent(w, s, n); err != nil {
 		return err
 	}
 	for _, ch := range site.Children {
@@ -276,7 +276,11 @@ func parseUnknown(p *Parser, block *TokenBlock) (err error) {
 	return
 }
 
-func writeIndent(w io.Writer, s string, depth int) error {
+// WriteIndent writes an indented line into a writer.
+//
+// Writes depth tab characters, the string s and a newline. If s is blank, no
+// indentation is used. s should not contain newlines.
+func WriteIndent(w io.Writer, s string, depth int) error {
 	const tabs = "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"
 
 	if s == "" {