// Copyright 2014 The Flutter Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. import 'dart:async'; import 'dart:ui' as ui show Image; import 'package:flutter/foundation.dart'; import 'package:flutter/painting.dart'; class TestImageInfo extends ImageInfo { TestImageInfo(this.value, {required super.image, super.scale, super.debugLabel}); final int value; @override String toString() => '${objectRuntimeType(this, 'TestImageInfo')}($value)'; @override TestImageInfo clone() { return TestImageInfo(value, image: image.clone(), scale: scale, debugLabel: debugLabel); } @override int get hashCode => Object.hash(value, image, scale, debugLabel); @override bool operator ==(Object other) { if (other.runtimeType != runtimeType) { return false; } return other is TestImageInfo && other.value == value && other.image.isCloneOf(image) && other.scale == scale && other.debugLabel == debugLabel; } } class TestImageProvider extends ImageProvider { const TestImageProvider(this.key, this.imageValue, {required this.image}); final int key; final int imageValue; final ui.Image image; @override Future obtainKey(ImageConfiguration configuration) { return Future.value(key); } @override ImageStreamCompleter loadImage(int key, ImageDecoderCallback decode) { return OneFrameImageStreamCompleter( SynchronousFuture(TestImageInfo(imageValue, image: image.clone())), ); } @override String toString() => '${objectRuntimeType(this, 'TestImageProvider')}($key, $imageValue)'; } class FailingTestImageProvider extends TestImageProvider { const FailingTestImageProvider(super.key, super.imageValue, {required super.image}); @override ImageStreamCompleter loadImage(int key, ImageDecoderCallback decode) { return OneFrameImageStreamCompleter( Future.sync(() => Future.error('loading failed!')), ); } } Future extractOneFrame(ImageStream stream) { final Completer completer = Completer(); late ImageStreamListener listener; listener = ImageStreamListener((ImageInfo image, bool synchronousCall) { completer.complete(image); stream.removeListener(listener); }); stream.addListener(listener); return completer.future; } class ErrorImageProvider extends ImageProvider { @override ImageStreamCompleter loadImage(ErrorImageProvider key, ImageDecoderCallback decode) { throw Error(); } @override ImageStreamCompleter loadBuffer(ErrorImageProvider key, DecoderBufferCallback decode) { throw Error(); } @override Future obtainKey(ImageConfiguration configuration) { return SynchronousFuture(this); } } class ObtainKeyErrorImageProvider extends ImageProvider { @override ImageStreamCompleter loadImage(ObtainKeyErrorImageProvider key, ImageDecoderCallback decode) { throw Error(); } @override ImageStreamCompleter loadBuffer(ObtainKeyErrorImageProvider key, DecoderBufferCallback decode) { throw UnimplementedError(); } @override Future obtainKey(ImageConfiguration configuration) { throw Error(); } } class LoadErrorImageProvider extends ImageProvider { @override ImageStreamCompleter loadImage(LoadErrorImageProvider key, ImageDecoderCallback decode) { throw Error(); } @override ImageStreamCompleter loadBuffer(LoadErrorImageProvider key, DecoderBufferCallback decode) { throw UnimplementedError(); } @override Future obtainKey(ImageConfiguration configuration) { return SynchronousFuture(this); } } class LoadErrorCompleterImageProvider extends ImageProvider { @override ImageStreamCompleter loadImage(LoadErrorCompleterImageProvider key, ImageDecoderCallback decode) { final Completer completer = Completer.sync(); completer.completeError(Error()); return OneFrameImageStreamCompleter(completer.future); } @override Future obtainKey(ImageConfiguration configuration) { return SynchronousFuture(this); } } class TestImageStreamCompleter extends ImageStreamCompleter { void testSetImage(ui.Image image) { setImage(ImageInfo(image: image)); } }