366 lines
9.2 KiB
Dart
366 lines
9.2 KiB
Dart
import 'dart:typed_data';
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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:pikapika/basic/Common.dart';
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import 'package:pikapika/basic/Cross.dart';
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import 'package:pikapika/basic/Method.dart';
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import 'package:flutter_svg/svg.dart';
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import 'package:pikapika/basic/config/ConvertToPNG.dart';
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import 'package:pikapika/basic/config/ImageAddress.dart';
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import 'dart:io';
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import 'dart:ui' as ui show Codec;
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import '../FilePhotoViewScreen.dart';
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Future<Uint8List> _loadImageFile(String path) {
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if (convertToPNG()) {
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return method.convertToPNG(path);
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}
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return File(path).readAsBytes();
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}
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// 从本地加载图片
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class ResourceFileImageProvider
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extends ImageProvider<ResourceFileImageProvider> {
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final String path;
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final double scale;
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ResourceFileImageProvider(this.path, {this.scale = 1.0});
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@override
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ImageStreamCompleter load(
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ResourceFileImageProvider key, DecoderCallback decode) {
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return MultiFrameImageStreamCompleter(
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codec: _loadAsync(key),
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scale: key.scale,
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);
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}
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@override
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Future<ResourceFileImageProvider> obtainKey(
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ImageConfiguration configuration) {
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return SynchronousFuture<ResourceFileImageProvider>(this);
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}
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Future<ui.Codec> _loadAsync(ResourceFileImageProvider key) async {
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assert(key == this);
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return PaintingBinding.instance!
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.instantiateImageCodec(await _loadImageFile(path));
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}
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@override
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bool operator ==(dynamic other) {
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if (other.runtimeType != runtimeType) return false;
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final ResourceFileImageProvider typedOther = other;
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return path == typedOther.path && scale == typedOther.scale;
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}
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@override
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int get hashCode => hashValues(path, scale);
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@override
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String toString() => '$runtimeType('
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'path: ${describeIdentity(path)},'
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' scale: $scale'
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')';
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}
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// 从本地加载图片
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class ResourceDownloadFileImageProvider
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extends ImageProvider<ResourceDownloadFileImageProvider> {
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final String path;
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final double scale;
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ResourceDownloadFileImageProvider(this.path, {this.scale = 1.0});
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@override
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ImageStreamCompleter load(
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ResourceDownloadFileImageProvider key, DecoderCallback decode) {
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return MultiFrameImageStreamCompleter(
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codec: _loadAsync(key),
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scale: key.scale,
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);
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}
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@override
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Future<ResourceDownloadFileImageProvider> obtainKey(
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ImageConfiguration configuration) {
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return SynchronousFuture<ResourceDownloadFileImageProvider>(this);
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}
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Future<ui.Codec> _loadAsync(ResourceDownloadFileImageProvider key) async {
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assert(key == this);
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return PaintingBinding.instance!.instantiateImageCodec(
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await File(await method.downloadImagePath(path)).readAsBytes());
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}
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@override
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bool operator ==(dynamic other) {
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if (other.runtimeType != runtimeType) return false;
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final ResourceDownloadFileImageProvider typedOther = other;
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return path == typedOther.path && scale == typedOther.scale;
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}
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@override
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int get hashCode => hashValues(path, scale);
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@override
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String toString() => '$runtimeType('
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'path: ${describeIdentity(path)},'
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' scale: $scale'
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')';
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}
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// 从远端加载图片
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class ResourceRemoteImageProvider
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extends ImageProvider<ResourceRemoteImageProvider> {
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final String fileServer;
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final String path;
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final double scale;
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ResourceRemoteImageProvider(this.fileServer, this.path, {this.scale = 1.0});
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@override
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ImageStreamCompleter load(
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ResourceRemoteImageProvider key, DecoderCallback decode) {
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return MultiFrameImageStreamCompleter(
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codec: _loadAsync(key),
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scale: key.scale,
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);
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}
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@override
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Future<ResourceRemoteImageProvider> obtainKey(
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ImageConfiguration configuration) {
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return SynchronousFuture<ResourceRemoteImageProvider>(this);
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}
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Future<ui.Codec> _loadAsync(ResourceRemoteImageProvider key) async {
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assert(key == this);
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var downloadTo = await method.remoteImageData(fileServer, path);
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return PaintingBinding.instance!
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.instantiateImageCodec(await File(downloadTo.finalPath).readAsBytes());
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}
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@override
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bool operator ==(dynamic other) {
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if (other.runtimeType != runtimeType) return false;
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final ResourceRemoteImageProvider typedOther = other;
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return fileServer == typedOther.fileServer &&
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path == typedOther.path &&
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scale == typedOther.scale;
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}
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@override
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int get hashCode => hashValues(fileServer, path, scale);
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@override
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String toString() => '$runtimeType('
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'fileServer: ${describeIdentity(fileServer)},'
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' path: ${describeIdentity(path)},'
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' scale: $scale'
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')';
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}
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// 下载的图片
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class DownloadImage extends StatefulWidget {
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final String path;
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final double? width;
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final double? height;
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const DownloadImage({
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Key? key,
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required this.path,
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this.width,
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this.height,
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}) : super(key: key);
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@override
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State<StatefulWidget> createState() => _DownloadImageState();
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}
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class _DownloadImageState extends State<DownloadImage> {
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late final Future<String> _future = method.downloadImagePath(widget.path);
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@override
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Widget build(BuildContext context) {
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return pathFutureImage(
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_future,
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widget.width,
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widget.height,
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context: context,
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);
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}
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}
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// 远端图片
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class RemoteImage extends StatefulWidget {
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final String fileServer;
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final String path;
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final double? width;
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final double? height;
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final BoxFit fit;
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const RemoteImage({
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Key? key,
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required this.fileServer,
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required this.path,
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this.width,
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this.height,
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this.fit = BoxFit.cover,
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}) : super(key: key);
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@override
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State<StatefulWidget> createState() => _RemoteImageState();
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}
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class _RemoteImageState extends State<RemoteImage> {
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late bool _mock;
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late Future<String> _future;
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@override
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void initState() {
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_mock = widget.fileServer == "" ||
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(widget.fileServer.contains(".xyz/") && currentImageAddress() < 0);
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if (!_mock) {
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_future = method
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.remoteImageData(widget.fileServer, widget.path)
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.then((value) => value.finalPath);
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}
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super.initState();
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}
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@override
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Widget build(BuildContext context) {
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if (_mock) {
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return buildMock(widget.width, widget.height);
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}
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return pathFutureImage(
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_future,
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widget.width,
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widget.height,
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fit: widget.fit,
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context: context,
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);
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}
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}
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Widget pathFutureImage(Future<String> future, double? width, double? height,
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{BoxFit fit = BoxFit.cover, BuildContext? context}) {
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return FutureBuilder(
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future: future,
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builder: (BuildContext context, AsyncSnapshot<String> snapshot) {
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if (snapshot.hasError) {
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print("${snapshot.error}");
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print("${snapshot.stackTrace}");
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return buildError(width, height);
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}
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if (snapshot.connectionState != ConnectionState.done) {
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return buildLoading(width, height);
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}
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return buildFile(
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snapshot.data!,
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width,
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height,
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fit: fit,
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context: context,
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);
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});
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}
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// 通用方法
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Widget buildSvg(String source, double? width, double? height,
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{Color? color, double? margin}) {
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var widget = Container(
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width: width,
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height: height,
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padding: margin != null ? const EdgeInsets.all(10) : null,
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child: Center(
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child: SvgPicture.asset(
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source,
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width: width,
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height: height,
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color: color,
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),
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),
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);
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return GestureDetector(onLongPress: () {}, child: widget);
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}
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Widget buildMock(double? width, double? height) {
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var widget = Container(
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width: width,
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height: height,
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padding: const EdgeInsets.all(10),
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child: Center(
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child: SvgPicture.asset(
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'lib/assets/unknown.svg',
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width: width,
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height: height,
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color: Colors.grey.shade600,
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),
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),
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);
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return GestureDetector(onLongPress: () {}, child: widget);
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}
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Widget buildError(double? width, double? height) {
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return Image(
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image: AssetImage('lib/assets/error.png'),
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width: width,
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height: height,
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);
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}
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Widget buildLoading(double? width, double? height) {
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double? size;
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if (width != null && height != null) {
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size = width < height ? width : height;
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}
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return SizedBox(
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width: width,
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height: height,
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child: Center(
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child: Icon(
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Icons.downloading,
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size: size,
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color: Colors.black12,
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),
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),
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);
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}
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Widget buildFile(String file, double? width, double? height,
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{BoxFit fit = BoxFit.cover, BuildContext? context}) {
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var image = Image(
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image: ResourceFileImageProvider(file),
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width: width,
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height: height,
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errorBuilder: (a, b, c) {
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print("$b");
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print("$c");
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return buildError(width, height);
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},
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fit: fit,
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);
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if (context == null) return image;
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return GestureDetector(
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onLongPress: () async {
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String? choose = await chooseListDialog(context, '请选择', ['预览图片', '保存图片']);
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switch (choose) {
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case '预览图片':
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Navigator.of(context).push(MaterialPageRoute(
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builder: (context) => FilePhotoViewScreen(file),
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));
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break;
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case '保存图片':
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saveImage(file, context);
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break;
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}
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},
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child: image,
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);
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}
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