55 lines
1.7 KiB
Dart
55 lines
1.7 KiB
Dart
import 'package:aves/model/image_file_service.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/material.dart';
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import 'package:flutter_svg/flutter_svg.dart';
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import 'package:pedantic/pedantic.dart';
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class UriPicture extends PictureProvider<UriPicture> {
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const UriPicture(this.uri, {this.colorFilter}) : assert(uri != null);
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final String uri;
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/// The [ColorFilter], if any, to use when drawing this picture.
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final ColorFilter colorFilter;
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@override
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Future<UriPicture> obtainKey(PictureConfiguration configuration) {
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return SynchronousFuture<UriPicture>(this);
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}
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@override
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PictureStreamCompleter load(UriPicture key, {PictureErrorListener onError}) {
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return OneFramePictureStreamCompleter(_loadAsync(key, onError: onError), informationCollector: () sync* {
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yield DiagnosticsProperty<String>('Uri', uri);
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});
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}
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Future<PictureInfo> _loadAsync(UriPicture key, {PictureErrorListener onError}) async {
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assert(key == this);
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final data = await ImageFileService.readAsBytes(uri);
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if (data == null || data.isEmpty) {
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return null;
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}
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final decoder = SvgPicture.svgByteDecoder;
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if (onError != null) {
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final future = decoder(data, colorFilter, key.toString());
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unawaited(future.catchError(onError));
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return future;
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}
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return decoder(data, colorFilter, key.toString());
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}
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@override
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bool operator ==(Object other) {
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if (other.runtimeType != runtimeType) return false;
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return other is UriPicture && other.uri == uri && other.colorFilter == colorFilter;
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}
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@override
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int get hashCode => hashValues(uri, colorFilter);
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@override
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String toString() => '${objectRuntimeType(this, 'UriPicture')}("$uri", colorFilter: $colorFilter)';
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}
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