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chore(mobile): cleanup asset viewer state (#26300)

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initState was quite noisy, so I've moved some things around and made the
intention a bit clearer.

Co-authored-by: Alex <alex.tran1502@gmail.com>
This commit is contained in:
Thomas
2026-02-19 18:26:21 +00:00
committed by GitHub
parent 7394fa1491
commit aa02310d63
1 changed files with 24 additions and 26 deletions
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50
mobile/lib/presentation/widgets/asset_viewer/asset_viewer.page.dart
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@@ -87,39 +87,37 @@ class AssetViewer extends ConsumerStatefulWidget {
}
class _AssetViewerState extends ConsumerState<AssetViewer> {
late PageController pageController;
late final _heroOffset = widget.heroOffset ?? TabsRouterScope.of(context)?.controller.activeIndex ?? 0;
late final _pageController = PageController(initialPage: widget.initialIndex);
late final _preloader = AssetPreloader(timelineService: ref.read(timelineServiceProvider), mounted: () => mounted);
StreamSubscription? _reloadSubscription;
late final int heroOffset;
bool _assetReloadRequested = false;
int _totalAssets = 0;
late final AssetPreloader _preloader;
KeepAliveLink? _stackChildrenKeepAlive;
bool _assetReloadRequested = false;
@override
void initState() {
super.initState();
assert(ref.read(currentAssetNotifier) != null, "Current asset should not be null when opening the AssetViewer");
pageController = PageController(initialPage: widget.initialIndex);
final timelineService = ref.read(timelineServiceProvider);
_totalAssets = timelineService.totalAssets;
_preloader = AssetPreloader(timelineService: timelineService, mounted: () => mounted);
WidgetsBinding.instance.addPostFrameCallback(_onAssetInit);
_reloadSubscription = EventStream.shared.listen(_onEvent);
heroOffset = widget.heroOffset ?? TabsRouterScope.of(context)?.controller.activeIndex ?? 0;
final asset = ref.read(currentAssetNotifier);
assert(asset != null, "Current asset should not be null when opening the AssetViewer");
if (asset != null) _stackChildrenKeepAlive = ref.read(stackChildrenNotifier(asset).notifier).ref.keepAlive();
_reloadSubscription = EventStream.shared.listen(_onEvent);
WidgetsBinding.instance.addPostFrameCallback(_onAssetInit);
}
@override
void dispose() {
pageController.dispose();
_pageController.dispose();
_preloader.dispose();
_reloadSubscription?.cancel();
_stackChildrenKeepAlive?.close();
SystemChrome.setEnabledSystemUIMode(SystemUiMode.edgeToEdge);
super.dispose();
}
@@ -176,26 +174,26 @@ class _AssetViewerState extends ConsumerState<AssetViewer> {
void _onTimelineReloadEvent() {
final timelineService = ref.read(timelineServiceProvider);
_totalAssets = timelineService.totalAssets;
final totalAssets = timelineService.totalAssets;
if (_totalAssets == 0) {
if (totalAssets == 0) {
context.maybePop();
return;
}
var index = pageController.page?.round() ?? 0;
var index = _pageController.page?.round() ?? 0;
final currentAsset = ref.read(currentAssetNotifier);
if (currentAsset != null) {
final newIndex = timelineService.getIndex(currentAsset.heroTag);
if (newIndex != null && newIndex != index) {
index = newIndex;
pageController.jumpToPage(index);
_pageController.jumpToPage(index);
}
}
if (index >= _totalAssets) {
index = _totalAssets - 1;
pageController.jumpToPage(index);
if (index >= totalAssets) {
index = totalAssets - 1;
_pageController.jumpToPage(index);
}
if (_assetReloadRequested) {
@@ -264,15 +262,15 @@ class _AssetViewerState extends ConsumerState<AssetViewer> {
PhotoViewGestureDetectorScope(
axis: Axis.horizontal,
child: PageView.builder(
controller: pageController,
controller: _pageController,
physics: isZoomed
? const NeverScrollableScrollPhysics()
: CurrentPlatform.isIOS
? const FastScrollPhysics()
: const FastClampingScrollPhysics(),
itemCount: _totalAssets,
itemCount: ref.read(timelineServiceProvider).totalAssets,
onPageChanged: (index) => _onAssetChanged(index),
itemBuilder: (context, index) => AssetPage(index: index, heroOffset: heroOffset),
itemBuilder: (context, index) => AssetPage(index: index, heroOffset: _heroOffset),
),
),
if (!CurrentPlatform.isIOS)