fix(mobile): not being able to zoom into live photos (#14608)

fix live photo zoom

mobile/lib/pages/common/gallery_viewer.page.dart

@@ -61,6 +61,7 @@ class GalleryViewerPage extends HookConsumerWidget {
     final localPosition = useRef<Offset?>(null);
     final currentIndex = useValueNotifier(initialIndex);
     final loadAsset = renderList.loadAsset;
+    final isPlayingMotionVideo = ref.watch(isPlayingMotionVideoProvider);
 
     Future<void> precacheNextImage(int index) async {
       if (!context.mounted) {
@@ -249,7 +250,6 @@ class GalleryViewerPage extends HookConsumerWidget {
     }
 
     PhotoViewGalleryPageOptions buildAsset(BuildContext context, int index) {
-      ref.read(isPlayingMotionVideoProvider.notifier).playing = false;
       var newAsset = loadAsset(index);
       final stackId = newAsset.stackId;
       if (stackId != null && currentIndex.value == index) {
@@ -260,7 +260,7 @@ class GalleryViewerPage extends HookConsumerWidget {
         }
       }
 
-      if (newAsset.isImage && !newAsset.isMotionPhoto) {
+      if (newAsset.isImage && !isPlayingMotionVideo) {
         return buildImage(context, newAsset);
       }
       return buildVideo(context, newAsset);
@@ -275,7 +275,7 @@ class GalleryViewerPage extends HookConsumerWidget {
         body: Stack(
           children: [
             PhotoViewGallery.builder(
-              key: const ValueKey('gallery'),
+              key: ValueKey(isPlayingMotionVideo),
               scaleStateChangedCallback: (state) {
                 final asset = ref.read(currentAssetProvider);
                 if (asset == null) {

mobile/lib/pages/common/native_video_viewer.page.dart

@@ -40,7 +40,6 @@ class NativeVideoViewerPage extends HookConsumerWidget {
     final controller = useState<NativeVideoPlayerController?>(null);
     final lastVideoPosition = useRef(-1);
     final isBuffering = useRef(false);
-    final showMotionVideo = useState(false);
 
     // When a video is opened through the timeline, `isCurrent` will immediately be true.
     // When swiping from video A to video B, `isCurrent` will initially be true for video A and false for video B.
@@ -50,30 +49,10 @@ class NativeVideoViewerPage extends HookConsumerWidget {
     final isCurrent = currentAsset.value == asset;
 
     // Used to show the placeholder during hero animations for remote videos to avoid a stutter
-    final isVisible =
-        useState((Platform.isIOS && asset.isLocal) || asset.isMotionPhoto);
+    final isVisible = useState(Platform.isIOS && asset.isLocal);
 
     final log = Logger('NativeVideoViewerPage');
 
-    ref.listen(isPlayingMotionVideoProvider, (_, value) async {
-      final videoController = controller.value;
-      if (!asset.isMotionPhoto || videoController == null || !context.mounted) {
-        return;
-      }
-
-      showMotionVideo.value = value;
-      try {
-        if (value) {
-          await videoController.seekTo(0);
-          await videoController.play();
-        } else {
-          await videoController.pause();
-        }
-      } catch (error) {
-        log.severe('Error toggling motion video: $error');
-      }
-    });
-
     Future<VideoSource?> createSource() async {
       if (!context.mounted) {
         return null;
@@ -81,7 +60,7 @@ class NativeVideoViewerPage extends HookConsumerWidget {
 
       try {
         final local = asset.local;
-        if (local != null && !asset.isMotionPhoto) {
+        if (local != null) {
           final file = await local.file;
           if (file == null) {
             throw Exception('No file found for the video');
@@ -204,9 +183,7 @@ class NativeVideoViewerPage extends HookConsumerWidget {
       ref.read(videoPlaybackValueProvider.notifier).value = videoPlayback;
 
       try {
-        if (asset.isVideo || showMotionVideo.value) {
-          await videoController.play();
-        }
+        await videoController.play();
         await videoController.setVolume(0.9);
       } catch (error) {
         log.severe('Error playing video: $error');
@@ -268,8 +245,7 @@ class NativeVideoViewerPage extends HookConsumerWidget {
         return;
       }
 
-      if (showMotionVideo.value &&
-          videoController.playbackInfo?.status == PlaybackStatus.stopped &&
+      if (videoController.playbackInfo?.status == PlaybackStatus.stopped &&
           !ref
               .read(appSettingsServiceProvider)
               .getSetting<bool>(AppSettingsEnum.loopVideo)) {
@@ -388,8 +364,7 @@ class NativeVideoViewerPage extends HookConsumerWidget {
         if (aspectRatio.value != null)
           Visibility.maintain(
             key: ValueKey(asset),
-            visible:
-                (asset.isVideo || showMotionVideo.value) && isVisible.value,
+            visible: isVisible.value,
             child: Center(
               key: ValueKey(asset),
               child: AspectRatio(

mobile/lib/widgets/asset_grid/immich_asset_grid_view.dart

@@ -13,6 +13,7 @@ import 'package:immich_mobile/extensions/build_context_extensions.dart';
 import 'package:immich_mobile/extensions/collection_extensions.dart';
 import 'package:immich_mobile/extensions/theme_extensions.dart';
 import 'package:immich_mobile/providers/asset_viewer/current_asset.provider.dart';
+import 'package:immich_mobile/providers/asset_viewer/is_motion_video_playing.provider.dart';
 import 'package:immich_mobile/providers/asset_viewer/scroll_notifier.provider.dart';
 import 'package:immich_mobile/providers/asset_viewer/show_controls.provider.dart';
 import 'package:immich_mobile/widgets/asset_grid/asset_drag_region.dart';
@@ -206,6 +207,7 @@ class ImmichAssetGridViewState extends ConsumerState<ImmichAssetGridView> {
       heroOffset: widget.heroOffset,
       onAssetTap: (asset) {
         ref.read(currentAssetProvider.notifier).set(asset);
+        ref.read(isPlayingMotionVideoProvider.notifier).playing = false;
         if (asset.isVideo) {
           ref.read(showControlsProvider.notifier).show = false;
         }