Introduce CMediaSessionPlaybackState and CMediaSessionActionType

ports/libsimpleservo/api/src/lib.rs

@@ -7,7 +7,8 @@ extern crate log;
 
 pub mod gl_glue;
 
-pub use servo::script_traits::MouseButton;
+pub use servo::embedder_traits::MediaSessionPlaybackState;
+pub use servo::script_traits::{MediaSessionActionType, MouseButton};
 
 use getopts::Options;
 use servo::compositing::windowing::{
@@ -133,7 +134,7 @@ pub trait HostTrait {
     /// Called when we get the media session metadata/
     fn on_media_session_metadata(&self, title: String, artist: String, album: String);
     /// Called when the media session playback state changes.
-    fn on_media_session_playback_state_change(&self, state: i32);
+	fn on_media_session_playback_state_change(&self, state: MediaSessionPlaybackState);
     /// Called when the media session position state is set.
     fn on_media_session_set_position_state(&self, duration: f64, position: f64, playback_rate: f64);
 }
@@ -472,9 +473,12 @@ impl ServoGlue {
         self.process_event(WindowEvent::Keyboard(key_event))
     }
 
-    pub fn media_session_action(&mut self, action: i32) -> Result<(), &'static str> {
+    pub fn media_session_action(
+        &mut self,
+        action: MediaSessionActionType,
+    ) -> Result<(), &'static str> {
         info!("Media session action {:?}", action);
-        self.process_event(WindowEvent::MediaSessionAction(action.into()))
+        self.process_event(WindowEvent::MediaSessionAction(action))
     }
 
     fn process_event(&mut self, event: WindowEvent) -> Result<(), &'static str> {
@@ -595,7 +599,7 @@ impl ServoGlue {
                         MediaSessionEvent::PlaybackStateChange(state) => self
                             .callbacks
                             .host_callbacks
-                            .on_media_session_playback_state_change(state as i32),
+                            .on_media_session_playback_state_change(state),
                         MediaSessionEvent::SetPositionState(position_state) => self
                             .callbacks
                             .host_callbacks

ports/libsimpleservo/capi/src/lib.rs

@@ -17,7 +17,8 @@ use env_logger;
 use log::LevelFilter;
 use simpleservo::{self, gl_glue, ServoGlue, SERVO};
 use simpleservo::{
-    Coordinates, EventLoopWaker, HostTrait, InitOptions, MouseButton, VRInitOptions,
+    Coordinates, EventLoopWaker, HostTrait, InitOptions, MediaSessionActionType,
+    MediaSessionPlaybackState, MouseButton, VRInitOptions,
 };
 use std::ffi::{CStr, CString};
 #[cfg(target_os = "windows")]
@@ -218,7 +219,7 @@ pub struct CHostCallbacks {
     pub set_clipboard_contents: extern "C" fn(contents: *const c_char),
     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_playback_state_change: extern "C" fn(state: CMediaSessionPlaybackState),
     pub on_media_session_set_position_state:
         extern "C" fn(duration: f64, position: f64, playback_rate: f64),
 }
@@ -254,6 +255,52 @@ impl CMouseButton {
     }
 }
 
+#[repr(C)]
+pub enum CMediaSessionPlaybackState {
+    None = 1,
+    Playing,
+    Paused,
+}
+
+impl From<MediaSessionPlaybackState> for CMediaSessionPlaybackState {
+    fn from(state: MediaSessionPlaybackState) -> Self {
+        match state {
+            MediaSessionPlaybackState::None_ => CMediaSessionPlaybackState::None,
+            MediaSessionPlaybackState::Playing => CMediaSessionPlaybackState::Playing,
+            MediaSessionPlaybackState::Paused => CMediaSessionPlaybackState::Paused,
+        }
+    }
+}
+
+#[repr(C)]
+pub enum CMediaSessionActionType {
+    Play = 1,
+    Pause,
+    SeekBackward,
+    SeekForward,
+    PreviousTrack,
+    NextTrack,
+    SkipAd,
+    Stop,
+    SeekTo,
+}
+
+impl CMediaSessionActionType {
+    pub fn convert(&self) -> MediaSessionActionType {
+        match self {
+            CMediaSessionActionType::Play => MediaSessionActionType::Play,
+            CMediaSessionActionType::Pause => MediaSessionActionType::Pause,
+            CMediaSessionActionType::SeekBackward => MediaSessionActionType::SeekBackward,
+            CMediaSessionActionType::SeekForward => MediaSessionActionType::SeekForward,
+            CMediaSessionActionType::PreviousTrack => MediaSessionActionType::PreviousTrack,
+            CMediaSessionActionType::NextTrack => MediaSessionActionType::NextTrack,
+            CMediaSessionActionType::SkipAd => MediaSessionActionType::SkipAd,
+            CMediaSessionActionType::Stop => MediaSessionActionType::Stop,
+            CMediaSessionActionType::SeekTo => MediaSessionActionType::SeekTo,
+        }
+    }
+}
+
 /// The returned string is not freed. This will leak.
 #[no_mangle]
 pub extern "C" fn servo_version() -> *const c_char {
@@ -608,10 +655,10 @@ pub extern "C" fn click(x: f32, y: f32) {
 }
 
 #[no_mangle]
-pub extern "C" fn media_session_action(action: i32) {
+pub extern "C" fn media_session_action(action: CMediaSessionActionType) {
     catch_any_panic(|| {
         debug!("media_session_action");
-        call(|s| s.media_session_action(action));
+        call(|s| s.media_session_action(action.convert()));
     });
 }
 
@@ -733,9 +780,9 @@ impl HostTrait for HostCallbacks {
         (self.0.on_media_session_metadata)(title.as_ptr(), artist.as_ptr(), album.as_ptr());
     }
 
-    fn on_media_session_playback_state_change(&self, state: i32) {
+    fn on_media_session_playback_state_change(&self, state: MediaSessionPlaybackState) {
         debug!("on_media_session_playback_state_change {:?}", state);
-        (self.0.on_media_session_playback_state_change)(state);
+        (self.0.on_media_session_playback_state_change)(state.into());
     }
 
     fn on_media_session_set_position_state(

support/hololens/ServoApp/BrowserPage.cpp

@@ -7,7 +7,6 @@
 #include "BrowserPage.h"
 #include "BrowserPage.g.cpp"
 #include "DefaultUrl.h"
-#include "MediaSession.h"
 
 using namespace std::placeholders;
 using namespace winrt::Windows::Foundation;

support/hololens/ServoApp/ServoApp.vcxproj

@@ -122,7 +122,6 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClInclude Include="logs.h" />
-    <ClInclude Include="MediaSession.h" />
     <ClInclude Include="pch.h" />
     <ClInclude Include="App.h">
       <DependentUpon>App.xaml</DependentUpon>

support/hololens/ServoApp/ServoApp.vcxproj.filters

@@ -40,9 +40,6 @@
     </ClInclude>
     <ClInclude Include="DefaultUrl.h" />
     <ClInclude Include="XRPkgChecker.h" />
-    <ClInclude Include="MediaSession.h">
-      <Filter>ServoControl</Filter>
-    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <Image Include="Assets\Wide310x150Logo.scale-200.png">

support/hololens/ServoApp/ServoControl/Servo.cpp

@@ -62,7 +62,8 @@ void on_media_session_metadata(const char *title, const char *album,
       char2hstring(title), char2hstring(album), char2hstring(artist));
 }
 
-void on_media_session_playback_state_change(const int state) {
+void on_media_session_playback_state_change(
+    const capi::CMediaSessionPlaybackState state) {
   return sServo->Delegate().OnServoMediaSessionPlaybackStateChange(state);
 }
 

support/hololens/ServoApp/ServoControl/Servo.h

@@ -50,6 +50,8 @@ class Servo {
   ServoDelegate &Delegate() { return mDelegate; }
 
   typedef capi::CMouseButton MouseButton;
+  typedef capi::CMediaSessionActionType MediaSessionActionType;
+  typedef capi::CMediaSessionPlaybackState MediaSessionPlaybackState;
 
   void PerformUpdates() { capi::perform_updates(); }
   void DeInit() { capi::deinit(); }
@@ -88,7 +90,7 @@ class Servo {
       capi::resize(mWindowWidth, mWindowHeight);
     }
   }
-  void SendMediaSessionAction(int32_t action) {
+  void SendMediaSessionAction(capi::CMediaSessionActionType action) {
     capi::media_session_action(action);
   }
 

support/hololens/ServoApp/ServoControl/ServoControl.cpp

@@ -272,7 +272,10 @@ hstring ServoControl::LoadURIOrSearch(hstring input) {
 }
 
 void ServoControl::SendMediaSessionAction(int32_t action) {
-  RunOnGLThread([=] { mServo->SendMediaSessionAction(action); });
+  RunOnGLThread([=] {
+    mServo->SendMediaSessionAction(
+        static_cast<Servo::MediaSessionActionType>(action));
+  });
 }
 
 void ServoControl::TryLoadUri(hstring input) {

support/hololens/ServoApp/ServoControl/ServoControl.h

@@ -3,7 +3,6 @@
 #include "OpenGLES.h"
 #include "Servo.h"
 #include "DefaultUrl.h"
-#include "MediaSession.h"
 
 namespace winrt::ServoApp::implementation {
 struct ServoControl : ServoControlT<ServoControl>, public servo::ServoDelegate {