format: parse task list html

Author: tulir

format/htmlparser.go

@@ -348,6 +348,8 @@ func (parser *HTMLParser) tagToString(node *html.Node, ctx Context) string {
 		return parser.imgToString(node, ctx)
 	case "hr":
 		return parser.HorizontalLine
+	case "input":
+		return parser.inputToString(node, ctx)
 	case "pre":
 		var preStr, language string
 		if node.FirstChild != nil && node.FirstChild.Type == html.ElementNode && node.FirstChild.Data == "code" {
@@ -371,6 +373,17 @@ func (parser *HTMLParser) tagToString(node *html.Node, ctx Context) string {
 	}
 }
 
+func (parser *HTMLParser) inputToString(node *html.Node, ctx Context) string {
+	if len(ctx.TagStack) > 1 && ctx.TagStack[len(ctx.TagStack)-2] == "li" {
+		_, checked := parser.maybeGetAttribute(node, "checked")
+		if checked {
+			return "[x]"
+		}
+		return "[ ]"
+	}
+	return parser.nodeToTagAwareString(node.FirstChild, ctx)
+}
+
 func (parser *HTMLParser) singleNodeToString(node *html.Node, ctx Context) TaggedString {
 	switch node.Type {
 	case html.TextNode: