Implement step 6 of media element 'time marches on' algoritm

1 files changed, 14 insertions, 1 deletions

diff --git a/components/script/dom/htmlmediaelement.rs b/components/script/dom/htmlmediaelement.rs
index 880ba8ea49c..ecbd5687bf9 100644
--- a/components/script/dom/htmlmediaelement.rs
+++ b/components/script/dom/htmlmediaelement.rs
@@ -204,6 +204,9 @@ pub struct HTMLMediaElement {
     text_tracks_list: MutNullableDom<TextTrackList>,
     /// Expected content length of the media asset being fetched or played.
     content_length: Cell<Option<u64>>,
+    /// Time of last timeupdate notification.
+    #[ignore_malloc_size_of = "Defined in time"]
+    next_timeupdate_event: Cell<Timespec>,
 }
 
 /// <https://html.spec.whatwg.org/multipage/#dom-media-networkstate>
@@ -261,6 +264,7 @@ impl HTMLMediaElement {
             played: Rc::new(DomRefCell::new(TimeRangesContainer::new())),
             text_tracks_list: Default::default(),
             content_length: Cell::new(None),
+            next_timeupdate_event: Cell::new(time::get_time() + Duration::milliseconds(250)),
         }
     }
 
@@ -303,7 +307,15 @@ impl HTMLMediaElement {
 
     /// https://html.spec.whatwg.org/multipage/#time-marches-on
     fn time_marches_on(&self) {
-        // TODO: implement this.
+        // Step 6.
+        if time::get_time() > self.next_timeupdate_event.get() {
+            let window = window_from_node(self);
+            window
+                .task_manager()
+                .media_element_task_source()
+                .queue_simple_event(self.upcast(), atom!("timeupdate"), &window);
+            self.next_timeupdate_event.set(time::get_time() + Duration::milliseconds(350));
+        }
     }
 
     /// <https://html.spec.whatwg.org/multipage/#internal-pause-steps>
@@ -1173,6 +1185,7 @@ impl HTMLMediaElement {
                     .borrow_mut()
                     .add(self.playback_position.get(), position);
                 self.playback_position.set(position);
+                self.time_marches_on();
             },
             PlayerEvent::StateChanged(ref state) => match *state {
                 PlaybackState::Paused => {