93 lines
2.3 KiB
Dart
93 lines
2.3 KiB
Dart
import 'package:cached_network_image/cached_network_image.dart';
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import 'package:flutter/material.dart';
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import '../../data/models/file_model.dart';
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import '../../services/cache_manager_service.dart';
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import '../../services/thumbnail_service.dart';
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import '../../core/utils/file_icon_utils.dart';
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/// 缩略图加载组件 — 异步获取 URL 并用 CachedNetworkImage 渲染
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class ThumbnailImage extends StatefulWidget {
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final FileModel file;
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final String? contextHint;
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final double borderRadius;
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const ThumbnailImage({
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super.key,
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required this.file,
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this.contextHint,
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this.borderRadius = 10,
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});
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@override
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State<ThumbnailImage> createState() => _ThumbnailImageState();
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}
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class _ThumbnailImageState extends State<ThumbnailImage> {
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String? _imageUrl;
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bool _isLoading = true;
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bool _hasError = false;
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@override
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void initState() {
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super.initState();
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_loadThumbnail();
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}
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@override
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void didUpdateWidget(ThumbnailImage oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (oldWidget.file.path != widget.file.path) {
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_loadThumbnail();
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}
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}
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Future<void> _loadThumbnail() async {
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setState(() {
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_isLoading = true;
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_hasError = false;
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});
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final url = await ThumbnailService.instance.getThumbnailUrl(
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fileUri: widget.file.relativePath,
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contextHint: widget.contextHint,
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);
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if (!mounted) return;
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setState(() {
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_imageUrl = url;
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_isLoading = false;
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_hasError = url == null;
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});
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}
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Widget _buildPlaceholder(BuildContext context) {
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return Center(
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child: FileIconUtils.buildIconWidget(
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context: context,
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file: widget.file,
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size: 40,
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iconSize: 22,
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borderRadius: widget.borderRadius,
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),
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);
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}
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@override
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Widget build(BuildContext context) {
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if (_isLoading) return _buildPlaceholder(context);
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if (_hasError || _imageUrl == null) return _buildPlaceholder(context);
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return ClipRRect(
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borderRadius: BorderRadius.circular(widget.borderRadius),
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child: CachedNetworkImage(
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imageUrl: _imageUrl!,
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cacheManager: CacheManagerService.instance.manager,
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fit: BoxFit.cover,
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placeholder: (context, url) => _buildPlaceholder(context),
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errorWidget: (context, url, error) => _buildPlaceholder(context),
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),
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);
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}
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}
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