more mpris features

backend/app.go

@@ -38,7 +38,10 @@ type App struct {
 	Player          *player.Player
 	UpdateChecker   UpdateChecker
 	MPRISHandler    *MPRISHandler
-	OnReactivate    func()
+
+	// UI callbacks to be set in main
+	OnReactivate func()
+	OnExit       func()
 
 	appName       string
 	appVersionTag string
@@ -104,8 +107,7 @@ func StartupApp(appName, displayAppName, appVersionTag, configFile, latestReleas
 		_, _ = a.ImageManager.GetCoverThumbnail(coverID)
 	})
 
-	a.MPRISHandler = NewMPRISHandler(displayAppName, a.Player, a.PlaybackManager)
-	a.MPRISHandler.Start()
+	a.setupMPRIS(displayAppName)
 
 	return a, nil
 }
@@ -138,9 +140,7 @@ func (a *App) startSessionWatcher(sessionPath string) {
 					activatePath := path.Join(sessionPath, sessionActivateFile)
 					if _, err := os.Stat(activatePath); err == nil {
 						os.Remove(path.Join(sessionPath, sessionActivateFile))
-						if a.OnReactivate != nil {
-							a.OnReactivate()
-						}
+						a.callOnReactivate()
 					}
 				}
 			}
@@ -148,6 +148,12 @@ func (a *App) startSessionWatcher(sessionPath string) {
 	}
 }
 
+func (a *App) callOnReactivate() {
+	if a.OnReactivate != nil {
+		a.OnReactivate()
+	}
+}
+
 func (a *App) initMPV() error {
 	p := player.NewWithClientName(a.appName)
 	c := a.Config.LocalPlayback
@@ -206,6 +212,23 @@ func (a *App) setupMPV() error {
 	return nil
 }
 
+func (a *App) setupMPRIS(mprisAppName string) {
+	a.MPRISHandler = NewMPRISHandler(mprisAppName, a.Player, a.PlaybackManager)
+	a.MPRISHandler.ArtURLLookup = a.ImageManager.GetCoverArtUrl
+	a.MPRISHandler.OnRaise = func() error { a.callOnReactivate(); return nil }
+	a.MPRISHandler.OnQuit = func() error {
+		if a.OnExit == nil {
+			return errors.New("no quit handler registered")
+		}
+		go func() {
+			time.Sleep(10 * time.Millisecond)
+			a.OnExit()
+		}()
+		return nil
+	}
+	a.MPRISHandler.Start()
+}
+
 func (a *App) LoginToDefaultServer(string) error {
 	serverCfg := a.ServerManager.GetDefaultServer()
 	if serverCfg == nil {

backend/imagemanager.go

@@ -88,6 +88,16 @@ func (i *ImageManager) GetFullSizeCoverArt(coverID string) (image.Image, error)
 	return im, nil
 }
 
+func (i *ImageManager) GetCoverArtUrl(coverID string) (string, error) {
+	path := i.filePathForCover(coverID)
+	if _, err := os.Stat(path); err == nil {
+		// this is probably broken for Windows but it's currently only used
+		// for MPRIS, so we are OK for now
+		return fmt.Sprintf("file://%s", path), nil
+	}
+	return "", errors.New("cover not found")
+}
+
 func (i *ImageManager) GetCachedArtistImage(artistID string) (image.Image, bool) {
 	return i.loadLocalImage(i.filePathForArtistImage(artistID))
 }

backend/mpris.go

@@ -31,7 +31,7 @@ type MPRISHandler struct {
 	OnRaise func() error
 
 	// Function to look up the artwork URL for a given track ID
-	ArtURLLookup func(trackID string) string
+	ArtURLLookup func(trackID string) (string, error)
 
 	playerName string
 	p          *player.Player
@@ -44,6 +44,10 @@ func NewMPRISHandler(playerName string, p *player.Player, pm *PlaybackManager) *
 	m := &MPRISHandler{playerName: playerName, p: p, pm: pm}
 	m.s = server.NewServer(playerName, m, m)
 	m.evt = events.NewEventHandler(m.s)
+	m.p.OnSeek(func() {
+		pos := secondsToMicroseconds(m.p.GetStatus().TimePos)
+		m.evt.Player.OnSeek(pos)
+	})
 	return m
 }
 
@@ -176,7 +180,9 @@ func (m *MPRISHandler) Metadata() (types.Metadata, error) {
 	}
 	var artURL string
 	if tr.ID != "" && m.ArtURLLookup != nil {
-		artURL = m.ArtURLLookup(tr.ID)
+		if u, err := m.ArtURLLookup(tr.ID); err == nil {
+			artURL = u
+		}
 	}
 	return types.Metadata{
 		TrackId:     dbus.ObjectPath(trackID),
@@ -205,11 +211,11 @@ func (m *MPRISHandler) Position() (int64, error) {
 }
 
 func (m *MPRISHandler) MinimumRate() (float64, error) {
-	return 0, notImplemented
+	return 1, nil
 }
 
 func (m *MPRISHandler) MaximumRate() (float64, error) {
-	return 0, notImplemented
+	return 1, nil
 }
 
 func (m *MPRISHandler) CanGoNext() (bool, error) {
@@ -229,7 +235,7 @@ func (m *MPRISHandler) CanPause() (bool, error) {
 }
 
 func (m *MPRISHandler) CanSeek() (bool, error) {
-	return false, notImplemented
+	return true, nil
 }
 
 func (m *MPRISHandler) CanControl() (bool, error) {

main.go

@@ -41,6 +41,10 @@ func main() {
 	}
 	mainWindow := ui.NewMainWindow(fyneApp, appname, displayName, appVersion, myApp, fyne.NewSize(w, h))
 	myApp.OnReactivate = mainWindow.Show
+	myApp.OnExit = func() {
+		saveWindowPosition(myApp.Config, mainWindow.Window)
+		fyneApp.Quit()
+	}
 
 	go func() {
 		// TODO: There is a race condition with laying out the window before the
@@ -61,8 +65,7 @@ func main() {
 
 	mainWindow.Show()
 	mainWindow.Window.SetCloseIntercept(func() {
-		myApp.Config.Application.WindowHeight = int(mainWindow.Canvas().Size().Height)
-		myApp.Config.Application.WindowWidth = int(mainWindow.Canvas().Size().Width)
+		saveWindowPosition(myApp.Config, mainWindow.Window)
 		if myApp.Config.Application.CloseToSystemTray &&
 			mainWindow.HaveSystemTray() {
 			mainWindow.Window.Hide()
@@ -75,3 +78,8 @@ func main() {
 	log.Println("Running shutdown tasks...")
 	myApp.Shutdown()
 }
+
+func saveWindowPosition(config *backend.Config, window fyne.Window) {
+	config.Application.WindowHeight = int(window.Canvas().Size().Height)
+	config.Application.WindowWidth = int(window.Canvas().Size().Width)
+}