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precache images in the memories viewer
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otsmr 2026-07-20 19:34:57 +02:00
parent 7e3caec42e
commit c651ee8c32
1 changed files with 44 additions and 1 deletions
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45
lib/src/visual/views/memories/synchronized_viewer.view.dart
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@ -42,6 +42,7 @@ class _SynchronizedImageViewerScreenState
final Set<String> _favoritedMediaIds = {};
bool _isSaving = false;
final Set<String> _storedMediaIds = {};
final Set<String> _precachedMediaIds = {};
late int _currentIndex;
bool _isZoomed = false;
@ -55,11 +56,15 @@ class _SynchronizedImageViewerScreenState
final initialId =
widget.galleryItems[widget.initialIndex].mediaService.mediaFile.mediaId;
_currentlyViewedMediaIdNotifier = ValueNotifier(initialId);
_precachedMediaIds.add(initialId);
_horizontalPager = PageController(initialPage: widget.initialIndex);
_verticalPager = PageController(initialPage: 1);
WidgetsBinding.instance.addPostFrameCallback((_) {
if (mounted) _verticalPager.addListener(_onVerticalScrollUpdated);
if (mounted) {
_verticalPager.addListener(_onVerticalScrollUpdated);
_precacheNeighbours(_currentIndex);
}
});
for (final item in widget.galleryItems) {
@ -314,6 +319,8 @@ class _SynchronizedImageViewerScreenState
.mediaId;
_currentlyViewedMediaIdNotifier.value = newMediaId;
widget.activeMediaIdNotifier.value = newMediaId;
_precachedMediaIds.add(newMediaId);
_precacheNeighbours(idx);
},
itemBuilder: (context, index) {
return SynchronizedViewerItemComp(
@ -369,4 +376,40 @@ class _SynchronizedImageViewerScreenState
),
);
}
void _precacheNeighbours(int index) {
if (!mounted) return;
final indicesToPrecache = [index - 5, index + 5];
for (final idx in indicesToPrecache) {
if (idx >= 0 && idx < widget.galleryItems.length) {
final item = widget.galleryItems[idx];
if (item.mediaService.mediaFile.type == MediaType.video) {
continue;
}
final mediaId = item.mediaService.mediaFile.mediaId;
if (_precachedMediaIds.contains(mediaId)) {
continue;
}
final filePath =
item.mediaService.storedPath.existsSync() &&
item.mediaService.storedPath.lengthSync() > 0
? item.mediaService.storedPath
: item.mediaService.tempPath.existsSync() &&
item.mediaService.tempPath.lengthSync() > 0
? item.mediaService.tempPath
: item.mediaService.thumbnailPath;
if (filePath.existsSync() && filePath.lengthSync() > 0) {
_precachedMediaIds.add(mediaId);
precacheImage(FileImage(filePath), context).onError((e, s) {
_precachedMediaIds.remove(mediaId);
});
}
}
}
}
}