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fix #91

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nyne
2024-12-11 13:41:34 +08:00
parent da025b16ff
commit d7b91f6a50
6 changed files with 101 additions and 65 deletions
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80
lib/foundation/image_provider/base_image_provider.dart
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@@ -1,5 +1,6 @@
import 'dart:async' show Future, StreamController, scheduleMicrotask;
import 'dart:convert';
import 'dart:math';
import 'dart:ui' as ui show Codec;
import 'dart:ui';
import 'package:flutter/foundation.dart';
@@ -10,6 +11,39 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
extends ImageProvider<T> {
const BaseImageProvider();
static double? _effectiveScreenWidth;
static const double _normalComicImageRatio = 0.72;
static const double _minComicImageWidth = 1920 * _normalComicImageRatio;
static TargetImageSize _getTargetSize(width, height) {
if (_effectiveScreenWidth == null) {
final screens = PlatformDispatcher.instance.displays;
for (var screen in screens) {
if (screen.size.width > screen.size.height) {
_effectiveScreenWidth = max(
_effectiveScreenWidth ?? 0,
screen.size.height * _normalComicImageRatio,
);
} else {
_effectiveScreenWidth = max(
_effectiveScreenWidth ?? 0,
screen.size.width
);
}
}
if (_effectiveScreenWidth! < _minComicImageWidth) {
_effectiveScreenWidth = _minComicImageWidth;
}
}
if (width > _effectiveScreenWidth!) {
height = (height * _effectiveScreenWidth! / width).round();
width = _effectiveScreenWidth!.round();
}
return TargetImageSize(width: width, height: height);
}
@override
ImageStreamCompleter loadImage(T key, ImageDecoderCallback decode) {
final chunkEvents = StreamController<ImageChunkEvent>();
@@ -45,19 +79,12 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
while (data == null && !stop) {
try {
if(_cache.containsKey(key.key)){
data = _cache[key.key];
} else {
data = await load(chunkEvents);
_checkCacheSize();
_cache[key.key] = data;
_cacheSize += data.length;
}
data = await load(chunkEvents);
} catch (e) {
if(e.toString().contains("Invalid Status Code: 404")) {
if (e.toString().contains("Invalid Status Code: 404")) {
rethrow;
}
if(e.toString().contains("Invalid Status Code: 403")) {
if (e.toString().contains("Invalid Status Code: 403")) {
rethrow;
}
if (e.toString().contains("handshake")) {
@@ -73,23 +100,24 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
}
if(stop) {
if (stop) {
throw Exception("Image loading is stopped");
}
if(data!.isEmpty) {
if (data!.isEmpty) {
throw Exception("Empty image data");
}
try {
final buffer = await ImmutableBuffer.fromUint8List(data);
return await decode(buffer);
return await decode(buffer, getTargetSize: _getTargetSize);
} catch (e) {
await CacheManager().delete(this.key);
if (data.length < 2 * 1024) {
// data is too short, it's likely that the data is text, not image
try {
var text = const Utf8Codec(allowMalformed: false).decoder.convert(data);
var text =
const Utf8Codec(allowMalformed: false).decoder.convert(data);
throw Exception("Expected image data, but got text: $text");
} catch (e) {
// ignore
@@ -107,30 +135,6 @@ abstract class BaseImageProvider<T extends BaseImageProvider<T>>
}
}
static final _cache = <String, Uint8List>{};
static var _cacheSize = 0;
static var _cacheSizeLimit = 50 * 1024 * 1024;
static void _checkCacheSize(){
while (_cacheSize > _cacheSizeLimit){
var firstKey = _cache.keys.first;
_cacheSize -= _cache[firstKey]!.length;
_cache.remove(firstKey);
}
}
static void clearCache(){
_cache.clear();
_cacheSize = 0;
}
static void setCacheSizeLimit(int size){
_cacheSizeLimit = size;
_checkCacheSize();
}
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents);
String get key;