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Fix Exception

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At line 963, when scrolling too fast in manga reader and page didn't load before.
```
═══════ Exception caught by foundation library ════════════════════════════════
The following StateError was thrown while dispatching notifications for ValueNotifier<Iterable<ItemPosition>>:
Bad state: No element
```
This commit is contained in:
Enbiya Olgun 2025-04-22 03:49:31 +02:00
parent 59b2389631
commit 3ecbef80b2
1 changed files with 45 additions and 44 deletions
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89
lib/modules/manga/reader/reader_view.dart
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@ -189,6 +189,7 @@ class _MangaChapterPageGalleryState
StreamController<double>.broadcast();
@override
void initState() {
super.initState();
_doubleClickAnimationController = AnimationController(
duration: _doubleTapAnimationDuration(),
vsync: this,
@ -203,8 +204,6 @@ class _MangaChapterPageGalleryState
_animation.addListener(() => _photoViewController.scale = _animation.value);
_itemPositionsListener.itemPositions.addListener(_readProgressListener);
_initCurrentIndex();
super.initState();
}
final double _horizontalScaleValue = 1.0;
@ -960,53 +959,55 @@ class _MangaChapterPageGalleryState
}
void _readProgressListener() {
_currentIndex = _itemPositionsListener.itemPositions.value.first.index;
final itemPositions = _itemPositionsListener.itemPositions.value;
int pagesLength =
(_pageMode == PageMode.doublePage &&
!(ref.watch(_currentReaderMode) ==
ReaderMode.horizontalContinuous))
? (_uChapDataPreload.length / 2).ceil() + 1
: _uChapDataPreload.length;
if (itemPositions.isNotEmpty) {
_currentIndex = itemPositions.first.index;
int pagesLength =
(_pageMode == PageMode.doublePage &&
!(ref.watch(_currentReaderMode) ==
ReaderMode.horizontalContinuous))
? (_uChapDataPreload.length / 2).ceil() + 1
: _uChapDataPreload.length;
if (_currentIndex! >= 0 && _currentIndex! < pagesLength) {
if (_readerController.chapter.id !=
_uChapDataPreload[_currentIndex!].chapter!.id) {
_readerController.setPageIndex(
_geCurrentIndex(_uChapDataPreload[_currentIndex! - 1].index!),
false,
);
if (mounted) {
setState(() {
_readerController = ref.read(
readerControllerProvider(
chapter: _uChapDataPreload[_currentIndex!].chapter!,
).notifier,
);
if (_currentIndex! >= 0 && _currentIndex! < pagesLength) {
if (_readerController.chapter.id !=
_uChapDataPreload[_currentIndex!].chapter!.id) {
_readerController.setPageIndex(
_geCurrentIndex(_uChapDataPreload[_currentIndex! - 1].index!),
false,
);
if (mounted) {
setState(() {
_readerController = ref.read(
readerControllerProvider(
chapter: _uChapDataPreload[_currentIndex!].chapter!,
).notifier,
);
chapter = _uChapDataPreload[_currentIndex!].chapter!;
_chapterUrlModel =
_uChapDataPreload[_currentIndex!].chapterUrlModel!;
_isBookmarked = _readerController.getChapterBookmarked();
});
chapter = _uChapDataPreload[_currentIndex!].chapter!;
_chapterUrlModel =
_uChapDataPreload[_currentIndex!].chapterUrlModel!;
_isBookmarked = _readerController.getChapterBookmarked();
});
}
}
if (itemPositions.last.index == pagesLength - 1) {
try {
ref
.watch(
getChapterPagesProvider(
chapter: _readerController.getNextChapter(),
).future,
)
.then((value) => _preloadNextChapter(value, chapter));
} catch (_) {}
}
}
if (_itemPositionsListener.itemPositions.value.last.index ==
pagesLength - 1) {
try {
ref
.watch(
getChapterPagesProvider(
chapter: _readerController.getNextChapter(),
).future,
)
.then((value) => _preloadNextChapter(value, chapter));
} catch (_) {}
}
ref
.read(currentIndexProvider(chapter).notifier)
.setCurrentIndex(_uChapDataPreload[_currentIndex!].index!);
ref
.read(currentIndexProvider(chapter).notifier)
.setCurrentIndex(_uChapDataPreload[_currentIndex!].index!);
}
}
}