extended HostTrait with on_media_session_set_position_state

components/embedder_traits/lib.rs

@@ -243,9 +243,9 @@ pub enum MediaSessionPlaybackState {
 /// https://w3c.github.io/mediasession/#dictdef-mediapositionstate
 #[derive(Clone, Debug, Deserialize, Serialize)]
 pub struct MediaPositionState {
-    pub duration: Option<f64>,
+    pub duration: f64,
-    pub playback_rate: Option<f64>,
+    pub playback_rate: f64,
-    pub position: Option<f64>,
+    pub position: f64,
 }
 
 impl MediaPositionState {

ports/libsimpleservo/api/src/lib.rs

@@ -132,8 +132,10 @@ pub trait HostTrait {
     fn set_clipboard_contents(&self, contents: String);
     /// Called when we get the media session metadata/
     fn on_media_session_metadata(&self, title: String, artist: String, album: String);
-    /// Called when the media sessoin playback state changes.
+    /// Called when the media session playback state changes.
     fn on_media_session_playback_state_change(&self, state: i32);
+    /// Called when the media session position state is set.
+    fn on_media_session_set_position_state(&self, duration: f64, position: f64, playback_rate: f64);
 }
 
 pub struct ServoGlue {
@@ -594,6 +596,14 @@ impl ServoGlue {
                             .callbacks
                             .host_callbacks
                             .on_media_session_playback_state_change(state as i32),
+                        MediaSessionEvent::SetPositionState(position_state) => self
+                            .callbacks
+                            .host_callbacks
+                            .on_media_session_set_position_state(
+                                position_state.duration,
+                                position_state.position,
+                                position_state.playback_rate,
+                            ),
                     };
                 },
                 EmbedderMsg::Status(..) |

ports/libsimpleservo/capi/src/lib.rs

@@ -219,6 +219,8 @@ pub struct CHostCallbacks {
     pub on_media_session_metadata:
         extern "C" fn(title: *const c_char, album: *const c_char, artist: *const c_char),
     pub on_media_session_playback_state_change: extern "C" fn(state: i32),
+    pub on_media_session_set_position_state:
+        extern "C" fn(duration: f64, position: f64, playback_rate: f64),
 }
 
 /// Servo options
@@ -727,4 +729,17 @@ impl HostTrait for HostCallbacks {
         debug!("on_media_session_playback_state_change {:?}", state);
         (self.0.on_media_session_playback_state_change)(state);
     }
+
+    fn on_media_session_set_position_state(
+        &self,
+        duration: f64,
+        position: f64,
+        playback_rate: f64,
+    ) {
+        debug!(
+            "on_media_session_set_position_state ({:?} {:?} {:?})",
+            duration, position, playback_rate
+        );
+        (self.0.on_media_session_set_position_state)(duration, position, playback_rate);
+    }
 }

ports/libsimpleservo/jniapi/src/lib.rs

@@ -560,6 +560,30 @@ impl HostTrait for HostCallbacks {
         )
         .unwrap();
     }
+
+    fn on_media_session_set_position_state(
+        &self,
+        duration: f64,
+        position: f64,
+        playback_rate: f64,
+    ) {
+        info!(
+            "on_media_session_playback_state_change ({:?}, {:?}, {:?})",
+            duration, position, playback_rate
+        );
+        let env = self.jvm.get_env().unwrap();
+        let duration = JValue::Float(duration as jfloat);
+        let position = JValue::Float(position as jfloat);
+        let playback_rate = JValue::Float(playback_rate as jfloat);
+
+        env.call_method(
+            self.callbacks.as_obj(),
+            "onMediaSessionSetPositionState",
+            "(FFF)V",
+            &[duration, position, playback_rate],
+        )
+        .unwrap();
+    }
 }
 
 fn initialize_android_glue(env: &JNIEnv, activity: JObject) {