phase2: markdown converter with goldmark, chroma, and ASCII-translit anchors

internal/converter/raw_html.go

@@ -0,0 +1,45 @@
+package converter
+
+import (
+	"github.com/yuin/goldmark/ast"
+	"github.com/yuin/goldmark/renderer"
+	"github.com/yuin/goldmark/util"
+)
+
+type escapedRawHTMLRenderer struct{}
+
+func (r *escapedRawHTMLRenderer) RegisterFuncs(reg renderer.NodeRendererFuncRegisterer) {
+	reg.Register(ast.KindHTMLBlock, r.renderHTMLBlock)
+	reg.Register(ast.KindRawHTML, r.renderRawHTML)
+}
+
+func (r *escapedRawHTMLRenderer) renderHTMLBlock(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	n := node.(*ast.HTMLBlock)
+	if entering {
+		for i := 0; i < n.Lines().Len(); i++ {
+			line := n.Lines().At(i)
+			_, _ = w.Write(util.EscapeHTML(line.Value(source)))
+		}
+		return ast.WalkContinue, nil
+	}
+
+	if n.HasClosure() {
+		_, _ = w.Write(util.EscapeHTML(n.ClosureLine.Value(source)))
+	}
+
+	return ast.WalkContinue, nil
+}
+
+func (r *escapedRawHTMLRenderer) renderRawHTML(w util.BufWriter, source []byte, node ast.Node, entering bool) (ast.WalkStatus, error) {
+	if !entering {
+		return ast.WalkSkipChildren, nil
+	}
+
+	n := node.(*ast.RawHTML)
+	for i := 0; i < n.Segments.Len(); i++ {
+		segment := n.Segments.At(i)
+		_, _ = w.Write(util.EscapeHTML(segment.Value(source)))
+	}
+
+	return ast.WalkSkipChildren, nil
+}