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Add in memory cache for thumbnails to improve hero experience

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This commit is contained in:
Vishnu Mohandas 2020-08-14 05:17:44 +05:30
parent 2505389d00
commit a1ebee60b8
2 changed files with 18 additions and 2 deletions
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7
lib/ui/thumbnail_widget.dart
View file

@ -1,4 +1,5 @@
import 'package:flutter/material.dart';
import 'package:photos/core/cache/image_cache.dart';
import 'package:photos/core/cache/thumbnail_cache.dart';
import 'package:photos/file_repository.dart';
import 'package:photos/models/file.dart';
@ -119,6 +120,12 @@ class _ThumbnailWidgetState extends State<ThumbnailWidget> {
!_encounteredErrorLoadingThumbnail &&
!_isLoadingThumbnail) {
_isLoadingThumbnail = true;
final cachedThumbnail = ThumbnailFileLruCache.get(widget.file);
if (cachedThumbnail != null) {
_imageProvider = Image.file(cachedThumbnail).image;
_hasLoadedThumbnail = true;
return;
}
getThumbnailFromServer(widget.file).then((file) {
final imageProvider = Image.file(file).image;
if (mounted) {

13
lib/utils/file_util.dart
View file

@ -101,14 +101,23 @@ Future<io.File> getFileFromServer(File file) async {
Future<io.File> getThumbnailFromServer(File file) async {
if (!file.isEncrypted) {
return ThumbnailCacheManager().getSingleFile(file.getThumbnailUrl());
return ThumbnailCacheManager()
.getSingleFile(file.getThumbnailUrl())
.then((data) {
ThumbnailFileLruCache.put(file, data);
return data;
});
} else {
return ThumbnailCacheManager()
.getFileFromCache(file.getThumbnailUrl())
.then((info) {
if (info == null) {
return _downloadAndDecryptThumbnail(file);
return _downloadAndDecryptThumbnail(file).then((data) {
ThumbnailFileLruCache.put(file, data);
return data;
});
} else {
ThumbnailFileLruCache.put(file, info.file);
return info.file;
}
});