address review: conditional event dispatch and explicit options

- play event only fires when transitioning from paused to playing
- pause event only fires when transitioning from playing to paused
- playing event always fires on play() per spec
- explicitly set bubbles: false, cancelable: false on events
- updated tests to verify no duplicate events on repeated calls

src/browser/tests/element/html/media.html

@@ -60,14 +60,25 @@
     audio.addEventListener('pause', () => events.push('pause'));
     audio.addEventListener('emptied', () => events.push('emptied'));
 
+    // First play: paused -> playing, fires play + playing
     audio.play();
     testing.expectEqual('play,playing', events.join(','));
 
-    audio.pause();
-    testing.expectEqual('play,playing,pause', events.join(','));
+    // Second play: already playing, fires only playing (not play)
+    audio.play();
+    testing.expectEqual('play,playing,playing', events.join(','));
 
+    // Pause: playing -> paused, fires pause
+    audio.pause();
+    testing.expectEqual('play,playing,playing,pause', events.join(','));
+
+    // Second pause: already paused, no event
+    audio.pause();
+    testing.expectEqual('play,playing,playing,pause', events.join(','));
+
+    // Load: fires emptied
     audio.load();
-    testing.expectEqual('play,playing,pause,emptied', events.join(','));
+    testing.expectEqual('play,playing,playing,pause,emptied', events.join(','));
   }
 </script>
 

src/browser/webapi/element/html/Media.zig

@@ -138,16 +138,21 @@ fn isMaybeSupported(mime_type: []const u8) bool {
 }
 
 pub fn play(self: *Media, page: *Page) !void {
+    const was_paused = self._paused;
     self._paused = false;
     self._ready_state = .HAVE_ENOUGH_DATA;
     self._network_state = .NETWORK_IDLE;
+    if (was_paused) {
         try self.dispatchEvent("play", page);
+    }
     try self.dispatchEvent("playing", page);
 }
 
 pub fn pause(self: *Media, page: *Page) !void {
+    if (!self._paused) {
         self._paused = true;
         try self.dispatchEvent("pause", page);
+    }
 }
 
 pub fn load(self: *Media, page: *Page) !void {
@@ -160,7 +165,7 @@ pub fn load(self: *Media, page: *Page) !void {
 }
 
 fn dispatchEvent(self: *Media, name: []const u8, page: *Page) !void {
-    const event = try Event.init(name, null, page);
+    const event = try Event.init(name, .{ .bubbles = false, .cancelable = false }, page);
     defer if (!event._v8_handoff) event.deinit(false);
     try page._event_manager.dispatch(self.asElement().asEventTarget(), event);
 }