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Improve image loading

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This commit is contained in:
nyne
2025-01-16 17:51:43 +08:00
parent 5d1d62e157
commit c640e6bfbf
13 changed files with 144 additions and 35 deletions
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21
lib/foundation/image_provider/base_image_provider.dart
View File

@@ -78,7 +78,13 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
while (data == null && !stop) {
try {
data = await load(chunkEvents);
data = await load(chunkEvents, () {
if (stop) {
throw const _ImageLoadingStopException();
}
});
} on _ImageLoadingStopException {
rethrow;
} catch (e) {
if (e.toString().contains("Invalid Status Code: 404")) {
rethrow;
@@ -100,7 +106,7 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
if (stop) {
throw Exception("Image loading is stopped");
throw const _ImageLoadingStopException();
}
if (data!.isEmpty) {
@@ -127,6 +133,8 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
rethrow;
}
} on _ImageLoadingStopException {
rethrow;
} catch (e, s) {
scheduleMicrotask(() {
PaintingBinding.instance.imageCache.evict(key);
@@ -138,7 +146,10 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
}
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents);
Future<Uint8List> load(
StreamController<ImageChunkEvent> chunkEvents,
void Function() checkStop,
);
String get key;
@@ -159,3 +170,7 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
typedef FileDecoderCallback = Future<ui.Codec> Function(Uint8List);
class _ImageLoadingStopException implements Exception {
const _ImageLoadingStopException();
}

6
lib/foundation/image_provider/cached_image.dart
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@@ -1,4 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:async' show Future;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:venera/network/images.dart';
@@ -26,9 +26,10 @@ class CachedImageProvider
static const _kMaxLoadingCount = 8;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
Future<Uint8List> load(chunkEvents, checkStop) async {
while(loadingCount > _kMaxLoadingCount) {
await Future.delayed(const Duration(milliseconds: 100));
checkStop();
}
loadingCount++;
try {
@@ -37,6 +38,7 @@ class CachedImageProvider
return file.readAsBytes();
}
await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey, cid)) {
checkStop();
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: progress.currentBytes,
expectedTotalBytes: progress.totalBytes,

6
lib/foundation/image_provider/history_image_provider.dart
View File

@@ -1,4 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:async' show Future;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:venera/foundation/local.dart';
@@ -17,7 +17,7 @@ class HistoryImageProvider
final History history;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
Future<Uint8List> load(chunkEvents, checkStop) async {
var url = history.cover;
if (!url.contains('/')) {
var localComic = LocalManager().find(history.id, history.type);
@@ -27,6 +27,7 @@ class HistoryImageProvider
var comicSource =
history.type.comicSource ?? (throw "Comic source not found.");
var comic = await comicSource.loadComicInfo!(history.id);
checkStop();
url = comic.data.cover;
history.cover = url;
HistoryManager().addHistory(history);
@@ -36,6 +37,7 @@ class HistoryImageProvider
history.type.sourceKey,
history.id,
)) {
checkStop();
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: progress.currentBytes,
expectedTotalBytes: progress.totalBytes,

19
lib/foundation/image_provider/image_favorites_provider.dart
View File

@@ -1,5 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:io';
import 'package:crypto/crypto.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
@@ -29,30 +28,36 @@ class ImageFavoritesProvider
String get eid => imageFavorite.eid;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent>? chunkEvents) async {
Future<Uint8List> load(
StreamController<ImageChunkEvent>? chunkEvents,
void Function()? checkStop,
) async {
var imageKey = imageFavorite.imageKey;
var localImage = await getImageFromLocal();
checkStop?.call();
if (localImage != null) {
return localImage;
}
var cacheImage = await readFromCache();
checkStop?.call();
if (cacheImage != null) {
return cacheImage;
}
var gotImageKey = false;
if (imageKey == "") {
imageKey = await getImageKey();
checkStop?.call();
gotImageKey = true;
}
Uint8List image;
try {
image = await getImageFromNetwork(imageKey, chunkEvents);
image = await getImageFromNetwork(imageKey, chunkEvents, checkStop);
} catch (e) {
if (gotImageKey) {
rethrow;
} else {
imageKey = await getImageKey();
image = await getImageFromNetwork(imageKey, chunkEvents);
image = await getImageFromNetwork(imageKey, chunkEvents, checkStop);
}
}
await writeToCache(image);
@@ -106,9 +111,13 @@ class ImageFavoritesProvider
}
Future<Uint8List> getImageFromNetwork(
String imageKey, StreamController<ImageChunkEvent>? chunkEvents) async {
String imageKey,
StreamController<ImageChunkEvent>? chunkEvents,
void Function()? checkStop,
) async {
await for (var progress
in ImageDownloader.loadComicImage(imageKey, sourceKey, cid, eid)) {
checkStop?.call();
if (chunkEvents != null) {
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: progress.currentBytes,

5
lib/foundation/image_provider/local_comic_image.dart
View File

@@ -1,4 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:async' show Future;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:venera/foundation/local.dart';
@@ -16,7 +16,7 @@ class LocalComicImageProvider
final LocalComic comic;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
Future<Uint8List> load(chunkEvents, checkStop) async {
File? file = comic.coverFile;
if(! await file.exists()) {
file = null;
@@ -49,6 +49,7 @@ class LocalComicImageProvider
if(file == null) {
throw "Error: Cover not found.";
}
checkStop();
var data = await file.readAsBytes();
if(data.isEmpty) {
throw "Exception: Empty file(${file.path}).";

6
lib/foundation/image_provider/local_favorite_image.dart
View File

@@ -1,4 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:async' show Future;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:venera/foundation/app.dart';
@@ -28,7 +28,7 @@ class LocalFavoriteImageProvider
}
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
Future<Uint8List> load(chunkEvents, checkStop) async {
var sourceKey = ComicSource.fromIntKey(intKey)?.key;
var fileName = key.hashCode.toString();
var file = File(FilePath.join(App.dataPath, 'favorite_cover', fileName));
@@ -37,7 +37,9 @@ class LocalFavoriteImageProvider
} else {
await file.create(recursive: true);
}
checkStop();
await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey)) {
checkStop();
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: progress.currentBytes,
expectedTotalBytes: progress.totalBytes,

60
lib/foundation/image_provider/reader_image.dart
View File

@@ -1,4 +1,4 @@
import 'dart:async' show Future, StreamController;
import 'dart:async' show Future;
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter_qjs/flutter_qjs.dart';
@@ -12,7 +12,7 @@ import 'package:venera/foundation/appdata.dart';
class ReaderImageProvider
extends BaseImageProvider<image_provider.ReaderImageProvider> {
/// Image provider for normal image.
const ReaderImageProvider(this.imageKey, this.sourceKey, this.cid, this.eid);
const ReaderImageProvider(this.imageKey, this.sourceKey, this.cid, this.eid, this.page);
final String imageKey;
@@ -22,8 +22,10 @@ class ReaderImageProvider
final String eid;
final int page;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
Future<Uint8List> load(chunkEvents, checkStop) async {
Uint8List? imageBytes;
if (imageKey.startsWith('file://')) {
var file = File(imageKey);
@@ -35,6 +37,7 @@ class ReaderImageProvider
} else {
await for (var event
in ImageDownloader.loadComicImage(imageKey, sourceKey, cid, eid)) {
checkStop();
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: event.currentBytes,
expectedTotalBytes: event.totalBytes,
@@ -60,14 +63,57 @@ class ReaderImageProvider
})()
''');
if (func is JSInvokable) {
var result = await func.invoke([imageBytes, cid, eid]);
func.free();
var result = func.invoke([imageBytes, cid, eid, page, sourceKey]);
if (result is Uint8List) {
return result;
imageBytes = result;
} else if (result is Future) {
var futureResult = await result;
if (futureResult is Uint8List) {
imageBytes = futureResult;
}
} else if (result is Map) {
var image = result['image'];
if (image is Uint8List) {
imageBytes = image;
} else if (image is Future) {
JSInvokable? onCancel;
if (result['onCancel'] is JSInvokable) {
onCancel = result['onCancel'];
}
if (onCancel == null) {
var futureImage = await image;
if (futureImage is Uint8List) {
imageBytes = futureImage;
}
} else {
dynamic futureImage;
image.then((value) {
futureImage = value;
futureImage ??= Uint8List(0);
});
while (futureImage == null) {
try {
checkStop();
}
catch(e) {
onCancel.invoke([]);
onCancel.free();
func.free();
rethrow;
}
await Future.delayed(Duration(milliseconds: 50));
}
if (futureImage is Uint8List) {
imageBytes = futureImage;
}
}
onCancel?.free();
}
}
func.free();
}
}
return imageBytes;
return imageBytes!;
}
@override