fix idle-active detection

src/mpris/player.rs

@@ -9,7 +9,7 @@ use zbus::zvariant::{ObjectPath, OwnedObjectPath, OwnedValue, Value};
 const MICROSECONDS: f64 = 1e6; // in a second
 
 #[derive(Default)]
-struct MetadataMap {
+pub struct MetadataMap {
     // mpris
     track_id: Option<OwnedObjectPath>,
     length: Option<i64>,
@@ -37,7 +37,7 @@ struct MetadataMap {
 }
 
 impl MetadataMap {
-    fn from_playbin_song(song: Option<&Song>) -> Self {
+    pub fn from_playbin_song(song: Option<&Song>) -> Self {
         song.map(|song| MetadataMap {
             // use a unique growing counter to identify tracks
             track_id: Some({
@@ -115,7 +115,6 @@ impl MetadataMap {
 }
 
 pub struct Player {
-    metadata: MetadataMap,
     window: SendWeakRef<Window>,
 }
 
@@ -125,7 +124,6 @@ impl Player {
         playbin: &Window,
     ) -> Result<InterfaceRef<Player>, zbus::Error> {
         let player = Self {
-            metadata: MetadataMap::from_playbin_song(None),
             window: playbin.downgrade().into(),
         };
 
@@ -268,7 +266,8 @@ impl Player {
 
     #[tracing::instrument(skip(self), parent = None, target = "audrey::mpris", level = Level::DEBUG, ret)]
     fn set_position(&self, track_id: ObjectPath<'_>, position: i64) -> zbus::fdo::Result<()> {
-        if Some(track_id) == self.metadata.track_id.as_ref().map(|x| x.as_ref()) {
+        let metadata = self.metadata();
+        if Some(&track_id.into()) == metadata.get("track_id") {
             self.window().set_time_pos(position as f64 / MICROSECONDS);
         }
         Ok(())
@@ -329,7 +328,8 @@ impl Player {
 
     #[zbus(property)]
     fn metadata(&self) -> HashMap<&'static str, OwnedValue> {
-        self.metadata.as_hash_map()
+        // TODO: no need to MetadataMap wrapper anymore
+        MetadataMap::from_playbin_song(self.window().song().as_ref()).as_hash_map()
     }
 
     #[zbus(property)]

src/mpv/event.rs

@@ -63,6 +63,7 @@ pub enum PropertyEventValue {
     Int64(i64),
     Double(f64),
     String(String),
+    Flag(bool),
 }
 
 #[derive(Clone, Debug)]

src/mpv/handle.rs

@@ -5,7 +5,7 @@ use super::event::{
 use super::{ffi, Error, Event as MpvEvent, GetProperty, SetProperty};
 use event_listener::{Event, EventListener, IntoNotification};
 use std::cell::{RefCell, RefMut};
-use std::ffi::{c_char, c_void, CStr, CString};
+use std::ffi::{c_char, c_int, c_void, CStr, CString};
 use std::fmt;
 use std::pin::Pin;
 use std::ptr::NonNull;
@@ -177,6 +177,18 @@ impl Handle {
         })
     }
 
+    pub fn observe_property_flag(&self, reply_userdata: u64, name: &str) -> Result<(), Error> {
+        let name = CString::new(name).expect("null bytes in property name");
+        Error::from_return_code(unsafe {
+            ffi::mpv_observe_property(
+                self.inner.as_ptr(),
+                reply_userdata,
+                name.as_ptr(),
+                ffi::mpv_format_MPV_FORMAT_FLAG,
+            )
+        })
+    }
+
     pub fn unobserve_property(&self, registered_reply_userdata: u64) -> Result<u32, Error> {
         let rc =
             unsafe { ffi::mpv_unobserve_property(self.inner.as_ptr(), registered_reply_userdata) };
@@ -299,6 +311,13 @@ impl Handle {
                                 String::from_utf8_lossy(value.to_bytes()).into_owned(),
                             ))
                         }
+                        ffi::mpv_format_MPV_FORMAT_FLAG => Some(PropertyEventValue::Flag(unsafe {
+                            match *(data.data as *mut c_int) {
+                                0 => false,
+                                1 => true,
+                                other => unreachable!("bad mpv flag value {other}"),
+                            }
+                        })),
                         _ => todo!(),
                     },
                 }))

src/ui/window.rs

@@ -99,7 +99,7 @@ mod imp {
 
             mpv.observe_property_string(0, "path").unwrap();
             mpv.observe_property_int64(3, "playlist-pos").unwrap();
-            mpv.observe_property(4, "idle-active").unwrap();
+            mpv.observe_property_flag(4, "idle-active").unwrap();
             mpv.observe_property(6, "playlist-count").unwrap();
             mpv.observe_property_double(7, "duration").unwrap();
 
@@ -407,6 +407,44 @@ mod imp {
             self.setup.present(Some(self.obj().as_ref()));
         }
 
+        fn mpris_player(&self) -> Option<InterfaceRef<mpris::Player>> {
+            let borrowed = self.mpris_player.borrow();
+            borrowed.as_ref().cloned()
+        }
+
+        fn mpris_player_playback_status_changed(&self) {
+            if let Some(iface_ref) = self.mpris_player() {
+                glib::spawn_future_local(async move {
+                    let iface = iface_ref.get().await;
+                    match iface
+                        .playback_status_changed(iface_ref.signal_emitter())
+                        .await
+                    {
+                        Ok(()) => {}
+                        Err(err) => event!(
+                            Level::ERROR,
+                            "could not notify new playback status through mpris interface: {err}"
+                        ),
+                    }
+                });
+            }
+        }
+
+        fn mpris_player_metadata_changed(&self) {
+            if let Some(iface_ref) = self.mpris_player() {
+                glib::spawn_future_local(async move {
+                    let iface = iface_ref.get().await;
+                    match iface.metadata_changed(iface_ref.signal_emitter()).await {
+                        Ok(()) => {}
+                        Err(err) => event!(
+                            Level::ERROR,
+                            "could not notify new metadata through mpris interface: {err}"
+                        ),
+                    }
+                });
+            }
+        }
+
         fn volume(&self) -> i64 {
             self.mpv.get_property("volume").unwrap()
         }
@@ -414,11 +452,7 @@ mod imp {
         fn set_volume(&self, volume: i64) {
             self.mpv.set_property("volume", volume).unwrap();
 
-            let iface_borrowed = self.mpris_player.borrow();
-            let iface_ref = match iface_borrowed.as_ref() {
-                None => return, // zbus not set up yet
-                Some(iface_ref) => iface_ref.clone(),
-            };
+            if let Some(iface_ref) = self.mpris_player() {
                 glib::spawn_future_local(async move {
                     let iface = iface_ref.get().await;
                     match iface.volume_changed(iface_ref.signal_emitter()).await {
@@ -430,6 +464,7 @@ mod imp {
                     }
                 });
             }
+        }
 
         fn mute(&self) -> bool {
             self.mpv.get_property("mute").unwrap()
@@ -445,6 +480,10 @@ mod imp {
 
         fn set_pause(&self, pause: bool) {
             self.mpv.set_property("pause", pause).unwrap();
+
+            if !self.idle_active() {
+                self.mpris_player_playback_status_changed();
+            }
         }
 
         fn time_pos(&self) -> f64 {
@@ -544,8 +583,13 @@ mod imp {
 
                 4 => {
                     assert_eq!(event.name, "idle-active");
+                    let value = match event.value {
+                        Some(PropertyEventValue::Flag(b)) => b,
+                        _ => unreachable!(),
+                    };
+                    event!(Level::TRACE, "idle-active is now {value}");
                     self.obj().notify("idle-active");
-                    if self.obj().idle_active() {
+                    if value {
                         self.on_idle_active();
                     }
                 }
@@ -641,6 +685,9 @@ mod imp {
 
             self.obj().set_playing_cover_art(None::<gdk::Texture>);
             self.obj().set_background(None::<gdk::Texture>);
+
+            self.mpris_player_metadata_changed();
+            self.mpris_player_playback_status_changed();
         }
 
         fn on_start_file(&self) {
@@ -663,11 +710,16 @@ mod imp {
             self.obj().notify("song");
             self.buffering_start();
 
-            let duration = self.obj().song().unwrap().duration() as f64;
+            let song = self.obj().song().unwrap();
+
+            let duration = song.duration() as f64;
             self.duration.set(duration);
             event!(target: "audrey::playback", Level::DEBUG, "duration is now {duration} (from subsonic)");
             self.obj().notify("duration");
 
+            self.mpris_player_metadata_changed();
+            self.mpris_player_playback_status_changed();
+
             let window = self.obj().clone();
             let song_id = window.song().unwrap().id();
             if let Some(handle) = self