Add support for bold italics text

Author: Matthew Williams

claat/parser/md/html.go

@@ -61,6 +61,17 @@ func isItalic(hn *html.Node) bool {
 		hn.DataAtom == atom.I
 }
 
+func isBoldAndItalic(hn *html.Node) bool {
+	if hn.Parent == nil || hn.Parent.Parent == nil {
+		return false
+	}
+	if hn.Type == html.TextNode {
+		hn = hn.Parent
+	}
+	return (isItalic(hn) && isBold(hn.Parent)) || (isItalic(hn.Parent) && isBold(hn))
+
+}
+
 func isConsole(hn *html.Node) bool {
 	if hn.Type == html.TextNode {
 		hn = hn.Parent

claat/parser/md/parse.go

@@ -849,6 +849,10 @@ func link(ds *docState) types.Node {
 func text(ds *docState) types.Node {
 	bold := isBold(ds.cur)
 	italic := isItalic(ds.cur)
+	if isBoldAndItalic(ds.cur) {
+		bold = true
+		italic = true
+	}
 	code := isCode(ds.cur) || isConsole(ds.cur)
 
 	// TODO: verify whether this actually does anything