[video_player] isCompleted event. (flutter#4923)

Adds `isCompleted` event to `VideoPlayerEvent`.

fixes flutter#21929

Author: tarrinneal

packages/video_player/video_player/CHANGELOG.md

@@ -1,3 +1,7 @@
+## 2.7.2
+
+* Adds `isCompleted` event to `VideoPlayerEvent`.
+
 ## 2.7.1
 
 * Adds pub topics to package metadata.

packages/video_player/video_player/lib/video_player.dart

@@ -52,6 +52,7 @@ class VideoPlayerValue {
     this.playbackSpeed = 1.0,
     this.rotationCorrection = 0,
     this.errorDescription,
+    this.isCompleted = false,
   });
 
   /// Returns an instance for a video that hasn't been loaded.
@@ -111,6 +112,12 @@ class VideoPlayerValue {
   /// If [hasError] is false this is `null`.
   final String? errorDescription;
 
+  /// True if video has finished playing to end.
+  ///
+  /// Reverts to false if video position changes, or video begins playing.
+  /// Does not update if video is looping.
+  final bool isCompleted;
+
   /// The [size] of the currently loaded video.
   final Size size;
 
@@ -158,6 +165,7 @@ class VideoPlayerValue {
     double? playbackSpeed,
     int? rotationCorrection,
     String? errorDescription = _defaultErrorDescription,
+    bool? isCompleted,
   }) {
     return VideoPlayerValue(
       duration: duration ?? this.duration,
@@ -176,6 +184,7 @@ class VideoPlayerValue {
       errorDescription: errorDescription != _defaultErrorDescription
           ? errorDescription
           : this.errorDescription,
+      isCompleted: isCompleted ?? this.isCompleted,
     );
   }
 
@@ -194,7 +203,8 @@ class VideoPlayerValue {
         'isBuffering: $isBuffering, '
         'volume: $volume, '
         'playbackSpeed: $playbackSpeed, '
-        'errorDescription: $errorDescription)';
+        'errorDescription: $errorDescription, '
+        'isCompleted: $isCompleted),';
   }
 
   @override
@@ -215,7 +225,8 @@ class VideoPlayerValue {
           errorDescription == other.errorDescription &&
           size == other.size &&
           rotationCorrection == other.rotationCorrection &&
-          isInitialized == other.isInitialized;
+          isInitialized == other.isInitialized &&
+          isCompleted == other.isCompleted;
 
   @override
   int get hashCode => Object.hash(
@@ -233,6 +244,7 @@ class VideoPlayerValue {
         size,
         rotationCorrection,
         isInitialized,
+        isCompleted,
       );
 }
 
@@ -441,6 +453,7 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
             rotationCorrection: event.rotationCorrection,
             isInitialized: event.duration != null,
             errorDescription: null,
+            isCompleted: false,
           );
           initializingCompleter.complete(null);
           _applyLooping();
@@ -453,6 +466,7 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
           // we use pause() and seekTo() to ensure the platform stops playing
           // and seeks to the last frame of the video.
           pause().then((void pauseResult) => seekTo(value.duration));
+          value = value.copyWith(isCompleted: true);
           break;
         case VideoEventType.bufferingUpdate:
           value = value.copyWith(buffered: event.buffered);
@@ -464,7 +478,12 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
           value = value.copyWith(isBuffering: false);
           break;
         case VideoEventType.isPlayingStateUpdate:
-          value = value.copyWith(isPlaying: event.isPlaying);
+          if (event.isPlaying ?? false) {
+            value =
+                value.copyWith(isPlaying: event.isPlaying, isCompleted: false);
+          } else {
+            value = value.copyWith(isPlaying: event.isPlaying);
+          }
           break;
         case VideoEventType.unknown:
           break;
@@ -737,6 +756,7 @@ class VideoPlayerController extends ValueNotifier<VideoPlayerValue> {
     value = value.copyWith(
       position: position,
       caption: _getCaptionAt(position),
+      isCompleted: position == value.duration,
     );
   }
 

packages/video_player/video_player/pubspec.yaml

@@ -3,7 +3,7 @@ description: Flutter plugin for displaying inline video with other Flutter
   widgets on Android, iOS, and web.
 repository: https://github.com/flutter/packages/tree/main/packages/video_player/video_player
 issue_tracker: https://github.com/flutter/flutter/issues?q=is%3Aissue+is%3Aopen+label%3A%22p%3A+video_player%22
-version: 2.7.1
+version: 2.7.2
 
 environment:
   sdk: ">=2.19.0 <4.0.0"

packages/video_player/video_player/test/video_player_test.dart

@@ -1069,7 +1069,8 @@ void main() {
           'isBuffering: true, '
           'volume: 0.5, '
           'playbackSpeed: 1.5, '
-          'errorDescription: null)');
+          'errorDescription: null, '
+          'isCompleted: false),');
     });
 
     group('copyWith()', () {
@@ -1204,6 +1205,101 @@ void main() {
     expect(colors.bufferedColor, bufferedColor);
     expect(colors.backgroundColor, backgroundColor);
   });
+
+  test('isCompleted updates on video end', () async {
+    final VideoPlayerController controller = VideoPlayerController.networkUrl(
+      _localhostUri,
+      videoPlayerOptions: VideoPlayerOptions(),
+    );
+
+    await controller.initialize();
+
+    final StreamController<VideoEvent> fakeVideoEventStream =
+        fakeVideoPlayerPlatform.streams[controller.textureId]!;
+
+    bool currentIsCompleted = controller.value.isCompleted;
+
+    final void Function() isCompletedTest = expectAsync0(() {});
+
+    controller.addListener(() async {
+      if (currentIsCompleted != controller.value.isCompleted) {
+        currentIsCompleted = controller.value.isCompleted;
+        if (controller.value.isCompleted) {
+          isCompletedTest();
+        }
+      }
+    });
+
+    fakeVideoEventStream.add(VideoEvent(eventType: VideoEventType.completed));
+  });
+
+  test('isCompleted updates on video play after completed', () async {
+    final VideoPlayerController controller = VideoPlayerController.networkUrl(
+      _localhostUri,
+      videoPlayerOptions: VideoPlayerOptions(),
+    );
+
+    await controller.initialize();
+
+    final StreamController<VideoEvent> fakeVideoEventStream =
+        fakeVideoPlayerPlatform.streams[controller.textureId]!;
+
+    bool currentIsCompleted = controller.value.isCompleted;
+
+    final void Function() isCompletedTest = expectAsync0(() {}, count: 2);
+    final void Function() isNoLongerCompletedTest = expectAsync0(() {});
+    bool hasLooped = false;
+
+    controller.addListener(() async {
+      if (currentIsCompleted != controller.value.isCompleted) {
+        currentIsCompleted = controller.value.isCompleted;
+        if (controller.value.isCompleted) {
+          isCompletedTest();
+          if (!hasLooped) {
+            fakeVideoEventStream.add(VideoEvent(
+                eventType: VideoEventType.isPlayingStateUpdate,
+                isPlaying: true));
+            hasLooped = !hasLooped;
+          }
+        } else {
+          isNoLongerCompletedTest();
+        }
+      }
+    });
+
+    fakeVideoEventStream.add(VideoEvent(eventType: VideoEventType.completed));
+  });
+
+  test('isCompleted updates on video seek to end', () async {
+    final VideoPlayerController controller = VideoPlayerController.networkUrl(
+      _localhostUri,
+      videoPlayerOptions: VideoPlayerOptions(),
+    );
+
+    await controller.initialize();
+
+    bool currentIsCompleted = controller.value.isCompleted;
+
+    final void Function() isCompletedTest = expectAsync0(() {});
+
+    controller.value =
+        controller.value.copyWith(duration: const Duration(seconds: 10));
+
+    controller.addListener(() async {
+      if (currentIsCompleted != controller.value.isCompleted) {
+        currentIsCompleted = controller.value.isCompleted;
+        if (controller.value.isCompleted) {
+          isCompletedTest();
+        }
+      }
+    });
+
+    // This call won't update isCompleted.
+    // The test will fail if `isCompletedTest` is called more than once.
+    await controller.seekTo(const Duration(seconds: 10));
+
+    await controller.seekTo(const Duration(seconds: 20));
+  });
 }
 
 class FakeVideoPlayerPlatform extends VideoPlayerPlatform {