Add subscription for updating time

src/greeter.rs

@@ -4,12 +4,12 @@
 use cosmic::app::{message, Command, Core, Settings};
 use cosmic::{
     executor,
-    iced::{self, alignment, Length},
+    iced::{self, alignment, futures::SinkExt, subscription, Length},
     style, widget, Element,
 };
 use greetd_ipc::{codec::SyncCodec, AuthMessageType, Request, Response};
 use std::{collections::HashMap, env, fs, io, path::Path, process, sync::Arc};
-use tokio::net::UnixStream;
+use tokio::{net::UnixStream, time};
 
 pub fn main() -> Result<(), Box<dyn std::error::Error>> {
     // The pwd::Passwd method is unsafe (but not labelled as such) due to using global state (libc pwent functions).
@@ -660,4 +660,21 @@ impl cosmic::Application for App {
         .content_fit(iced::ContentFit::Cover)
         .into()
     }
+
+    fn subscription(&self) -> subscription::Subscription<Self::Message> {
+        struct HeartbeatSubscription;
+
+        subscription::channel(
+            std::any::TypeId::of::<HeartbeatSubscription>(),
+            16,
+            |mut msg_tx| async move {
+                loop {
+                    // Send heartbeat once a second to update time
+                    //TODO: only send this when needed
+                    msg_tx.send(Message::None).await.unwrap();
+                    time::sleep(time::Duration::new(1, 0)).await;
+                }
+            },
+        )
+    }
 }

src/image_container.rs

@@ -122,7 +122,13 @@ where
         viewport: &Rectangle,
     ) {
         match &self.image_opt {
-            Some(image) => draw(renderer, layout, image, self.content_fit, [0.0, 0.0, 0.0, 0.0]),
+            Some(image) => draw(
+                renderer,
+                layout,
+                image,
+                self.content_fit,
+                [0.0, 0.0, 0.0, 0.0],
+            ),
             None => {}
         }
 

src/locker.rs

@@ -9,12 +9,7 @@ use cosmic::{
         event::wayland::{Event as WaylandEvent, OutputEvent, SessionLockEvent},
         futures::{self, SinkExt},
         subscription,
-        wayland::session_lock::{
-            get_lock_surface,
-            lock,
-            destroy_lock_surface,
-            unlock,
-        },
+        wayland::session_lock::{destroy_lock_surface, get_lock_surface, lock, unlock},
         Length, Subscription,
     },
     iced_runtime::core::window::Id as SurfaceId,
@@ -594,13 +589,13 @@ impl cosmic::Application for App {
         .into()
     }
 
-    //TODO: subscription for date/time
     fn subscription(&self) -> Subscription<Self::Message> {
         if self.exited {
             return Subscription::none();
         }
 
-        struct SomeWorker;
+        struct HeartbeatSubscription;
+        struct PamSubscription;
 
         //TODO: how to avoid cloning this on every time subscription is called?
         let username = self.flags.current_user.name.clone();
@@ -618,7 +613,19 @@ impl cosmic::Application for App {
                 _ => None,
             }),
             subscription::channel(
-                std::any::TypeId::of::<SomeWorker>(),
+                std::any::TypeId::of::<HeartbeatSubscription>(),
+                16,
+                |mut msg_tx| async move {
+                    loop {
+                        // Send heartbeat once a second to update time
+                        //TODO: only send this when needed
+                        msg_tx.send(Message::None).await.unwrap();
+                        time::sleep(time::Duration::new(1, 0)).await;
+                    }
+                },
+            ),
+            subscription::channel(
+                std::any::TypeId::of::<PamSubscription>(),
                 16,
                 |mut msg_tx| async move {
                     loop {