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@ -15,14 +15,14 @@ import 'package:flutter/widgets.dart';
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/// cache gif fetched image
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/// cache gif fetched image
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class GifCache{
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class GifCache{
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final Map<String,List<ImageInfo>> caches= Map();
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final Map<String,List<ImageInfo>?> caches= Map();
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void clear() {
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void clear() {
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caches.clear();
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caches.clear();
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}
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}
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bool evict(Object key) {
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bool evict(Object key) {
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final List<ImageInfo> pendingImage = caches.remove(key);
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final List<ImageInfo>? pendingImage = caches.remove(key);
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if(pendingImage!=null){
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if(pendingImage!=null){
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return true;
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return true;
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}
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}
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@ -34,11 +34,11 @@ class GifCache{
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class GifController extends AnimationController{
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class GifController extends AnimationController{
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GifController({
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GifController({
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@required TickerProvider vsync,
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required TickerProvider vsync,
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double value=0.0,
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double value=0.0,
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Duration reverseDuration,
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Duration? reverseDuration,
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Duration duration,
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Duration? duration,
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AnimationBehavior animationBehavior
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AnimationBehavior? animationBehavior
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}):super.unbounded(
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}):super.unbounded(
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value:value,
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value:value,
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reverseDuration:reverseDuration,
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reverseDuration:reverseDuration,
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@ -57,8 +57,8 @@ class GifController extends AnimationController{
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class GifImage extends StatefulWidget{
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class GifImage extends StatefulWidget{
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GifImage({
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GifImage({
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@required this.image,
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required this.image,
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@required this.controller,
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required this.controller,
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this.semanticLabel,
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this.semanticLabel,
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this.excludeFromSemantics = false,
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this.excludeFromSemantics = false,
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this.width,
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this.width,
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@ -73,20 +73,20 @@ class GifImage extends StatefulWidget{
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this.matchTextDirection = false,
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this.matchTextDirection = false,
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this.gaplessPlayback = false,
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this.gaplessPlayback = false,
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});
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});
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final VoidCallback onFetchCompleted;
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final VoidCallback? onFetchCompleted;
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final GifController controller;
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final GifController controller;
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final ImageProvider image;
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final ImageProvider image;
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final double width;
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final double? width;
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final double height;
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final double? height;
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final Color color;
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final Color? color;
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final BlendMode colorBlendMode;
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final BlendMode? colorBlendMode;
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final BoxFit fit;
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final BoxFit? fit;
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final AlignmentGeometry alignment;
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final AlignmentGeometry alignment;
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final ImageRepeat repeat;
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final ImageRepeat repeat;
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final Rect centerSlice;
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final Rect? centerSlice;
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final bool matchTextDirection;
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final bool matchTextDirection;
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final bool gaplessPlayback;
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final bool gaplessPlayback;
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final String semanticLabel;
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final String? semanticLabel;
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final bool excludeFromSemantics;
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final bool excludeFromSemantics;
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@override
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@override
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@ -98,12 +98,12 @@ class GifImage extends StatefulWidget{
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}
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}
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class GifImageState extends State<GifImage>{
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class GifImageState extends State<GifImage>{
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List<ImageInfo> _infos;
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List<ImageInfo>? _infos;
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int _curIndex = 0;
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int _curIndex = 0;
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bool _fetchComplete= false;
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bool _fetchComplete= false;
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ImageInfo get _imageInfo {
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ImageInfo? get _imageInfo {
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if(!_fetchComplete)return null;
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if(!_fetchComplete)return null;
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return _infos==null?null:_infos[_curIndex];
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return _infos==null?null:_infos![_curIndex];
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}
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}
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@ -131,7 +131,7 @@ class GifImageState extends State<GifImage>{
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_fetchComplete=true;
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_fetchComplete=true;
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_curIndex = widget.controller.value.toInt();
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_curIndex = widget.controller.value.toInt();
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if(widget.onFetchCompleted!=null){
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if(widget.onFetchCompleted!=null){
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widget.onFetchCompleted();
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widget.onFetchCompleted!();
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}
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}
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});
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});
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});
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});
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@ -162,7 +162,7 @@ class GifImageState extends State<GifImage>{
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_fetchComplete=true;
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_fetchComplete=true;
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_curIndex = widget.controller.value.toInt();
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_curIndex = widget.controller.value.toInt();
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if(widget.onFetchCompleted!=null){
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if(widget.onFetchCompleted!=null){
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widget.onFetchCompleted();
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widget.onFetchCompleted!();
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}
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}
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});
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});
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});
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});
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@ -203,16 +203,16 @@ HttpClient get _httpClient {
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HttpClient client = _sharedHttpClient;
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HttpClient client = _sharedHttpClient;
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assert(() {
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assert(() {
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if (debugNetworkImageHttpClientProvider != null)
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if (debugNetworkImageHttpClientProvider != null)
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client = debugNetworkImageHttpClientProvider();
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client = debugNetworkImageHttpClientProvider!();
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return true;
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return true;
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}());
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}());
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return client;
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return client;
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}
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}
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Future<List<ImageInfo>> fetchGif(ImageProvider provider) async{
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Future<List<ImageInfo>?> fetchGif(ImageProvider provider) async{
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List<ImageInfo> infos = [];
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List<ImageInfo>? infos = [];
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dynamic data;
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late dynamic data;
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String key =provider is NetworkImage?provider.url:provider is AssetImage?provider.assetName:provider is MemoryImage?provider.bytes.toString():"";
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String key =provider is NetworkImage?provider.url:provider is AssetImage?provider.assetName:provider is MemoryImage?provider.bytes.toString():"";
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if(GifImage.cache.caches.containsKey(key)){
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if(GifImage.cache.caches.containsKey(key)){
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infos = GifImage.cache.caches[key];
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infos = GifImage.cache.caches[key];
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@ -240,7 +240,7 @@ Future<List<ImageInfo>> fetchGif(ImageProvider provider) async{
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data = provider.bytes;
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data = provider.bytes;
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}
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}
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ui.Codec codec=await PaintingBinding.instance.instantiateImageCodec(data.buffer.asUint8List());
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ui.Codec codec=await PaintingBinding.instance!.instantiateImageCodec(data.buffer.asUint8List());
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infos = [];
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infos = [];
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for(int i = 0;i<codec.frameCount;i++){
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for(int i = 0;i<codec.frameCount;i++){
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FrameInfo frameInfo = await codec.getNextFrame();
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FrameInfo frameInfo = await codec.getNextFrame();
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章文轩
3 years ago