use HTML tokenizer to parse artist biography

ui/util/util.go

@@ -3,6 +3,10 @@ package util
 import (
 	"fmt"
 	"math"
+	"strings"
+
+	"fyne.io/fyne/v2/widget"
+	"golang.org/x/net/html"
 )
 
 func SecondsToTimeString(s float64) string {
@@ -15,3 +19,31 @@ func SecondsToTimeString(s float64) string {
 
 	return fmt.Sprintf("%3d:%02d", min, sec)
 }
+
+func RichTextSegsFromHTMLString(s string) []widget.RichTextSegment {
+	tokr := html.NewTokenizer(strings.NewReader(s))
+	var segs []widget.RichTextSegment
+
+	var isLink bool
+	var done bool
+	for !done {
+		tt := tokr.Next()
+		switch {
+		case tt == html.ErrorToken:
+			done = true
+		case tt == html.StartTagToken:
+			t := tokr.Token()
+			isLink = t.Data == "a"
+		case tt == html.EndTagToken:
+			isLink = false
+		case tt == html.TextToken:
+			t := tokr.Token()
+			// for now, skip displaying Navidrome's "Read more on Last.FM" link
+			if !isLink {
+				segs = append(segs, &widget.TextSegment{Text: t.Data})
+			}
+		}
+	}
+
+	return segs
+}