Add typedef for ErrorListener

Author: Carapacik

cached_network_image/lib/src/image_provider/_image_loader.dart

@@ -23,6 +23,7 @@ class ImageLoader implements platform.ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
+    VoidCallback? errorListener,
     ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
@@ -38,7 +39,7 @@ class ImageLoader implements platform.ImageLoader {
       maxHeight,
       maxWidth,
       headers,
-      (_) {},
+      (_) => errorListener?.call(),
       imageRenderMethodForWeb,
       evictImage,
     );
@@ -54,7 +55,7 @@ class ImageLoader implements platform.ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ValueChanged<Object>? errorListener,
+    ErrorListener? errorListener,
     ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
@@ -80,12 +81,12 @@ class ImageLoader implements platform.ImageLoader {
     String url,
     String? cacheKey,
     StreamController<ImageChunkEvent> chunkEvents,
-    _FileDecoderCallback decode,
+    Future<ui.Codec> Function(Uint8List) decode,
     BaseCacheManager cacheManager,
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ValueChanged<Object>? errorListener,
+    ErrorListener? errorListener,
     ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) async* {
@@ -143,5 +144,3 @@ class ImageLoader implements platform.ImageLoader {
     await chunkEvents.close();
   }
 }
-
-typedef _FileDecoderCallback = Future<ui.Codec> Function(Uint8List);

cached_network_image/lib/src/image_provider/cached_network_image_provider.dart

@@ -3,7 +3,7 @@ import 'dart:ui' as ui show Codec;
 
 import 'package:cached_network_image/src/image_provider/multi_image_stream_completer.dart';
 import 'package:cached_network_image_platform_interface/cached_network_image_platform_interface.dart'
-    show ImageRenderMethodForWeb;
+    show ErrorListener, ImageRenderMethodForWeb;
 import 'package:cached_network_image_platform_interface/cached_network_image_platform_interface.dart'
     if (dart.library.io) '_image_loader.dart'
     if (dart.library.html) 'package:cached_network_image_web/cached_network_image_web.dart'
@@ -44,7 +44,7 @@ class CachedNetworkImageProvider
   final double scale;
 
   /// Listener to be called when images fails to load.
-  final ValueChanged<Object>? errorListener;
+  final ErrorListener? errorListener;
 
   /// Set headers for the image provider, for example for authentication
   final Map<String, String>? headers;
@@ -104,6 +104,7 @@ class CachedNetworkImageProvider
       maxHeight,
       maxWidth,
       headers,
+      () => errorListener,
       imageRenderMethodForWeb,
       () => PaintingBinding.instance.imageCache.evict(key),
     );

cached_network_image/test/image_provider_test.dart

@@ -142,7 +142,7 @@ void main() {
             events.add(event);
           },
           onError: (Object error, StackTrace? stackTrace) {
-            imageAvailable.completeError(error as Object, stackTrace);
+            imageAvailable.completeError(error, stackTrace);
           },
         ),
       );

cached_network_image_platform_interface/lib/cached_network_image_platform_interface.dart

@@ -7,6 +7,9 @@ import 'dart:ui' as ui;
 import 'package:flutter/material.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 
+/// Listener for errors
+typedef ErrorListener = void Function(Object);
+
 /// Render options for images on the web platform.
 enum ImageRenderMethodForWeb {
   /// HtmlImage uses a default web image including default browser caching.
@@ -32,6 +35,7 @@ class ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
+    VoidCallback? errorListener,
     ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
@@ -49,7 +53,7 @@ class ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ValueChanged<Object>? errorListener,
+    ErrorListener? errorListener,
     ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {

cached_network_image_web/lib/cached_network_image_web.dart

@@ -7,10 +7,7 @@ import 'dart:ui' as ui;
 
 import 'package:cached_network_image_platform_interface'
         '/cached_network_image_platform_interface.dart' as platform
-    show ImageLoader;
-import 'package:cached_network_image_platform_interface'
-        '/cached_network_image_platform_interface.dart'
-    show ImageRenderMethodForWeb;
+    show ImageLoader, ErrorListener, ImageRenderMethodForWeb;
 import 'package:flutter/material.dart';
 import 'package:flutter_cache_manager/flutter_cache_manager.dart';
 
@@ -27,7 +24,8 @@ class ImageLoader implements platform.ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
+    VoidCallback? errorListener,
+    platform.ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
     return _load(
@@ -59,7 +57,7 @@ class ImageLoader implements platform.ImageLoader {
     int? maxWidth,
     Map<String, String>? headers,
     ValueChanged<Object>? errorListener,
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
+    platform.ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
     return _load(
@@ -89,12 +87,12 @@ class ImageLoader implements platform.ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ValueChanged<Object>? errorListener,
-    ImageRenderMethodForWeb imageRenderMethodForWeb,
+    platform.ErrorListener? errorListener,
+    platform.ImageRenderMethodForWeb imageRenderMethodForWeb,
     VoidCallback evictImage,
   ) {
     switch (imageRenderMethodForWeb) {
-      case ImageRenderMethodForWeb.HttpGet:
+      case platform.ImageRenderMethodForWeb.HttpGet:
         return _loadAsyncHttpGet(
           url,
           cacheKey,
@@ -107,7 +105,7 @@ class ImageLoader implements platform.ImageLoader {
           errorListener,
           evictImage,
         );
-      case ImageRenderMethodForWeb.HtmlImage:
+      case platform.ImageRenderMethodForWeb.HtmlImage:
         return _loadAsyncHtmlImage(url, chunkEvents).asStream();
     }
   }
@@ -121,7 +119,7 @@ class ImageLoader implements platform.ImageLoader {
     int? maxHeight,
     int? maxWidth,
     Map<String, String>? headers,
-    ValueChanged<Object>? errorListener,
+    platform.ErrorListener? errorListener,
     VoidCallback evictImage,
   ) async* {
     try {