cmd/trayscale: support showing "This device: node (IP)"

internal/tray/tray.go

@@ -2,7 +2,9 @@ package tray
 
 import (
 	_ "embed"
+	"fmt"
 
+	"deedles.dev/trayscale/internal/tsutil"
 	"fyne.io/systray"
 )
 
@@ -22,21 +24,25 @@ func statusIcon(online bool) []byte {
 }
 
 type Tray struct {
-	showItem *systray.MenuItem
-	quitItem *systray.MenuItem
+	showItem     *systray.MenuItem
+	quitItem     *systray.MenuItem
+	selfNodeItem *systray.MenuItem
 }
 
 func New(online bool) *Tray {
 	systray.SetIcon(statusIcon(online))
 	systray.SetTitle("Trayscale")
 
+	selfNodeItem := systray.AddMenuItem("", "")
+	systray.AddSeparator()
 	showWindow := systray.AddMenuItem("Show", "")
 	systray.AddSeparator()
 	quit := systray.AddMenuItem("Quit", "")
 
 	return &Tray{
-		showItem: showWindow,
-		quitItem: quit,
+		showItem:     showWindow,
+		quitItem:     quit,
+		selfNodeItem: selfNodeItem,
 	}
 }
 
@@ -48,12 +54,45 @@ func (t *Tray) ShowChan() <-chan struct{} {
 	return t.showItem.ClickedCh
 }
 
-func (t *Tray) SetOnlineStatus(online bool) {
+func (t *Tray) setOnlineStatus(online bool) {
+	systray.SetIcon(statusIcon(online))
+}
+
+func (t *Tray) Update(s tsutil.Status, previousOnlineStatus bool) {
 	if t == nil {
 		return
 	}
 
-	systray.SetIcon(statusIcon(online))
+	if s.Online() != previousOnlineStatus {
+		t.setOnlineStatus(s.Online())
+	}
+
+	var title string
+	if s.Status != nil && s.Status.Self != nil {
+		// A naive approach to get first available TS IP.
+		// Ways to refine: sort and get the "Less"er or prefer
+		// first IPv4 in the list.
+		var ipInfo string
+		if len(s.Status.Self.TailscaleIPs) > 0 {
+			ipInfo = fmt.Sprintf(
+				" (%s)",
+				s.Status.Self.TailscaleIPs[0].String(),
+			)
+		}
+
+		title = fmt.Sprintf(
+			"This device: %s%s",
+			s.Status.Self.HostName,
+			ipInfo,
+		)
+	}
+
+	if title == "" {
+		t.selfNodeItem.Hide()
+	} else {
+		t.selfNodeItem.SetTitle(title)
+		t.selfNodeItem.Show()
+	}
 }
 
 var systrayExit = make(chan func(), 1)

internal/ui/app.go

@@ -166,10 +166,10 @@ func (a *App) updatePeers(status tsutil.Status) {
 
 func (a *App) update(s tsutil.Status) {
 	online := s.Online()
+	a.tray.Update(s, a.online)
 	if a.online != online {
 		a.online = online
 		a.notify(online) // TODO: Notify on startup if not connected?
-		a.tray.SetOnlineStatus(online)
 	}
 	if a.win == nil {
 		return