Files
venera/lib/foundation/image_provider/cached_image.dart
pkuislm a1474ca9c3 更改安卓端的文件访问方式,优化导入逻辑 (#64)
* Refactor import function & Allow import local comics without copying them to local path.

* android: use file_picker instead, support directory access for android 10

* Improve import logic

* Fix sql query.

* Add ability to remove invalid favorite items.

* Perform sort before choosing cover

* Revert changes of "use file_picker instead".

* Try catch on "check update"

* Added module 'flutter_saf'

* gitignore

* remove unsupported arch in build.gradle

* Use flutter_saf to handle android's directory and files, improve import logic.

* revert changes of 'requestLegacyExternalStorage'

* fix cbz import

* openDirectoryPlatform

* Remove double check on source folder

* use openFilePlatform

* remove unused import

* improve local comic's path handling

* bump version

* fix pubspec format

* return null when comic folder is empty
2024-11-23 11:05:00 +08:00

51 lines
1.5 KiB
Dart

import 'dart:async' show Future, StreamController;
import 'dart:io';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:venera/network/images.dart';
import 'package:venera/utils/io.dart';
import 'base_image_provider.dart';
import 'cached_image.dart' as image_provider;
class CachedImageProvider
extends BaseImageProvider<image_provider.CachedImageProvider> {
/// Image provider for normal image.
///
/// [url] is the url of the image. Local file path is also supported.
const CachedImageProvider(this.url, {this.headers, this.sourceKey, this.cid});
final String url;
final Map<String, String>? headers;
final String? sourceKey;
final String? cid;
@override
Future<Uint8List> load(StreamController<ImageChunkEvent> chunkEvents) async {
if(url.startsWith("file://")) {
var file = openFilePlatform(url.substring(7));
return file.readAsBytes();
}
await for (var progress in ImageDownloader.loadThumbnail(url, sourceKey, cid)) {
chunkEvents.add(ImageChunkEvent(
cumulativeBytesLoaded: progress.currentBytes,
expectedTotalBytes: progress.totalBytes,
));
if(progress.imageBytes != null) {
return progress.imageBytes!;
}
}
throw "Error: Empty response body.";
}
@override
Future<CachedImageProvider> obtainKey(ImageConfiguration configuration) {
return SynchronousFuture(this);
}
@override
String get key => url + (sourceKey ?? "") + (cid ?? "");
}