add unsynced lyrics view (not tested yet)

ui/widgets/lyricsviewer.go

@@ -1,15 +1,51 @@
 package widgets
 
-import "fyne.io/fyne/v2/widget"
+import (
+	"fyne.io/fyne/v2"
+	"fyne.io/fyne/v2/container"
+	"fyne.io/fyne/v2/widget"
+	"github.com/dweymouth/supersonic/backend/mediaprovider"
+)
 
 type LyricsViewer struct {
-	widget.Label
+	widget.BaseWidget
+
+	noLyricsLabel  widget.Label
+	unsyncedViewer *widget.RichText
+
+	container *container.Scroll
 }
 
 func NewLyricsViewer() *LyricsViewer {
-	l := &LyricsViewer{Label: widget.Label{
+	l := &LyricsViewer{noLyricsLabel: widget.Label{
 		Text: "Lyrics not available",
 	}}
 	l.ExtendBaseWidget(l)
+	l.container = container.NewVScroll(&l.noLyricsLabel)
 	return l
 }
+
+func (l *LyricsViewer) SetLyrics(lyrics *mediaprovider.Lyrics) {
+	if lyrics == nil {
+		l.container.Content = &l.noLyricsLabel
+		l.Refresh()
+		return
+	}
+
+	if l.unsyncedViewer == nil {
+		l.unsyncedViewer = widget.NewRichText()
+	}
+	l.unsyncedViewer.Segments = l.unsyncedViewer.Segments[:0]
+	for _, line := range lyrics.Lines {
+		ts := &widget.TextSegment{Text: line.Text}
+		ts.Style.Alignment = fyne.TextAlignCenter
+		ts.Style.Inline = false
+		l.unsyncedViewer.Segments = append(l.unsyncedViewer.Segments, ts)
+	}
+	l.container.Content = l.unsyncedViewer
+	l.Refresh()
+}
+
+func (l *LyricsViewer) CreateRenderer() fyne.WidgetRenderer {
+	return widget.NewSimpleRenderer(l.container)
+}