Fix #745: add option to prevent screensaver on Now Playing page

ui/browsing/router.go

@@ -17,6 +17,8 @@ type Router struct {
 	Controller *controller.Controller
 	Nav        NavigationHandler
 	widgetPool *util.WidgetPool
+
+	OnNavigateTo func(controller.Route)
 }
 
 func NewRouter(app *backend.App, controller *controller.Controller, nav NavigationHandler) Router {
@@ -63,8 +65,11 @@ func (r Router) CreatePage(rte controller.Route) Page {
 	return nil
 }
 
-func (r Router) NavigateTo(rte controller.Route) {
+func (r *Router) NavigateTo(rte controller.Route) {
 	if rte != r.Nav.CurrentPage() {
 		r.Nav.SetPage(r.CreatePage(rte))
 	}
+	if r.OnNavigateTo != nil {
+		r.OnNavigateTo(rte)
+	}
 }

ui/dialogs/settingsdialog.go

@@ -634,12 +634,16 @@ func (s *SettingsDialog) createAdvancedTab() *container.TabItem {
 	})
 	osMediaAPIs.Checked = s.config.Application.EnableOSMediaPlayerAPIs
 
+	preventScreensaver := widget.NewCheckWithData(lang.L("Prevent screensaver on Now Playing page"),
+		binding.BindBool(&s.config.Application.PreventScreensaverOnNowPlayingPage))
+
 	return container.NewTabItem(lang.L("Advanced"), container.NewVBox(
 		multi,
 		sslSkip,
 		update,
 		lrclib,
 		osMediaAPIs,
+		preventScreensaver,
 		imgCacheCfg,
 	))
 }

ui/mainwindow.go

@@ -51,6 +51,8 @@ type MainWindow struct {
 
 	// updated when changing servers or libraries
 	librarySubmenu *fyne.Menu
+
+	isScreensaverDisabled bool
 }
 
 func NewMainWindow(fyneApp fyne.App, appName, displayAppName, appVersion string, app *backend.App) MainWindow {
@@ -156,6 +158,18 @@ func NewMainWindow(fyneApp fyne.App, appName, displayAppName, appVersion string,
 	m.Window.SetContent(fynetooltip.AddWindowToolTipLayer(m.content, m.Window.Canvas()))
 	m.setInitialSize()
 
+	m.Router.OnNavigateTo = func(r controller.Route) {
+		if r.Page == controller.NowPlayingRoute().Page {
+			if m.App.Config.Application.PreventScreensaverOnNowPlayingPage && !m.isScreensaverDisabled {
+				fyne.CurrentApp().Driver().SetDisableScreenBlanking(true)
+				m.isScreensaverDisabled = true
+			}
+		} else if m.isScreensaverDisabled {
+			fyne.CurrentApp().Driver().SetDisableScreenBlanking(false)
+			m.isScreensaverDisabled = false
+		}
+	}
+
 	m.Window.SetCloseIntercept(func() {
 		m.SaveWindowSettings()
 		if app.Config.Application.CloseToSystemTray && m.HaveSystemTray() {