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@@ -0,0 +1,83 @@
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+import 'dart:ui' as ui;
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+import 'dart:ui';
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+
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+import 'package:flutter/foundation.dart';
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+import 'package:flutter/material.dart';
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+
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+import 'dart:ui' as ui;
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+
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+import 'package:network_image_cached/src/http_request.dart';
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+
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+class CachedNetworkImageProvider
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+ extends ImageProvider<CachedNetworkImageProvider> {
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+ final String imageUrl;
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+ final int count;
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+ final BoxFit fit;
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+ final double? width;
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+ final double? height;
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+ final Widget? placeholder;
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+ final Widget? errorWidget;
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+ final bool cached;
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+ final String? cachkey;
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+ final Widget? loadwidget;
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+
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+ const CachedNetworkImageProvider({
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+ required this.imageUrl,
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+ required this.cachkey,
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+ required this.fit,
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+ this.count = 10,
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+ this.height,
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+ this.width,
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+ this.errorWidget,
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+ this.placeholder,
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+ this.cached = true,
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+ this.loadwidget = const CircularProgressIndicator(),
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+ });
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+
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+ @override
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+ ImageStreamCompleter loadImage(
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+ CachedNetworkImageProvider key,
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+ ImageDecoderCallback decode,
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+ ) {
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+ // 1. Создаём Future, который загрузит и декодирует изображение
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+
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+ // 2. Возвращаем ImageStreamCompleter, который управляет потоком загрузки
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+ return MultiFrameImageStreamCompleter(
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+ codec: _loadAndDecodeImage(decode),
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+ scale: 1.0,
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+ informationCollector: () => <DiagnosticsNode>[
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+ DiagnosticsProperty<CachedNetworkImageProvider>(
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+ 'Image provider',
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+ key,
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+ showName: false,
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+ ),
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+ ],
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+ );
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+ }
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+
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+ // Вспомогательный метод: загружает байты и декодирует в ui.Image
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+ Future<ui.Codec> _loadAndDecodeImage(ImageDecoderCallback decode) async {
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+ try {
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+ // 1. Отправляем HTTP‑запрос
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+ HttpGetImage httpGetImage = HttpGetImage(url: imageUrl, count: count);
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+ // 2. Декодируем байты в ui.Image
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+
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+ Uint8List img = await httpGetImage.getDataObjectIsolate();
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+ final decodedImage = await decode(
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+ await ImmutableBuffer.fromUint8List(img),
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+ );
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+
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+ return decodedImage;
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+ } catch (e) {
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+ // Если ошибка — бросаем исключение (будет обработано в Image widget)
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+ throw Exception('Failed to load image: $e');
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+ }
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+ }
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+
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+ @override
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+ Future<CachedNetworkImageProvider> obtainKey(
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+ ImageConfiguration configuration,
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+ ) {
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+ return SynchronousFuture<CachedNetworkImageProvider>(this);
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+ }
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+}
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