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immich/mobile/lib/shared/cache/custom_image_cache.dart

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import 'package:flutter/painting.dart';
import 'original_image_provider.dart';
/// [ImageCache] that uses two caches for small and large images
/// so that a single large image does not evict all small iamges
final class CustomImageCache implements ImageCache {
final _small = ImageCache();
final _large = ImageCache();
@override
int get maximumSize => _small.maximumSize + _large.maximumSize;
@override
int get maximumSizeBytes => _small.maximumSizeBytes + _large.maximumSizeBytes;
@override
set maximumSize(int value) => _small.maximumSize = value;
@override
set maximumSizeBytes(int value) => _small.maximumSize = value;
@override
void clear() {
_small.clear();
_large.clear();
}
@override
void clearLiveImages() {
_small.clearLiveImages();
_large.clearLiveImages();
}
@override
bool containsKey(Object key) =>
(key is OriginalImageProvider ? _large : _small).containsKey(key);
@override
int get currentSize => _small.currentSize + _large.currentSize;
@override
int get currentSizeBytes => _small.currentSizeBytes + _large.currentSizeBytes;
@override
bool evict(Object key, {bool includeLive = true}) =>
(key is OriginalImageProvider ? _large : _small)
.evict(key, includeLive: includeLive);
@override
int get liveImageCount => _small.liveImageCount + _large.liveImageCount;
@override
int get pendingImageCount =>
_small.pendingImageCount + _large.pendingImageCount;
@override
ImageStreamCompleter? putIfAbsent(
Object key,
ImageStreamCompleter Function() loader, {
ImageErrorListener? onError,
}) =>
(key is OriginalImageProvider ? _large : _small)
.putIfAbsent(key, loader, onError: onError);
@override
ImageCacheStatus statusForKey(Object key) =>
(key is OriginalImageProvider ? _large : _small).statusForKey(key);
}