285 lines
10 KiB
Dart
285 lines
10 KiB
Dart
import 'dart:async';
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import 'dart:io';
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import 'package:aves/model/filters/album.dart';
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import 'package:aves/model/filters/filters.dart';
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import 'package:aves/model/filters/path.dart';
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import 'package:aves/model/source/album.dart';
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import 'package:aves/model/source/collection_source.dart';
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import 'package:aves/services/common/services.dart';
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import 'package:aves/theme/durations.dart';
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import 'package:aves/theme/icons.dart';
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import 'package:aves/utils/android_file_utils.dart';
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import 'package:aves/widgets/collection/collection_page.dart';
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import 'package:aves/widgets/common/basic/insets.dart';
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import 'package:aves/widgets/common/basic/scaffold.dart';
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import 'package:aves/widgets/common/behaviour/pop/double_back.dart';
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import 'package:aves/widgets/common/behaviour/pop/scope.dart';
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import 'package:aves/widgets/common/behaviour/pop/tv_navigation.dart';
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import 'package:aves/widgets/common/identity/aves_filter_chip.dart';
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import 'package:aves/widgets/common/identity/empty.dart';
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import 'package:aves/widgets/explorer/app_bar.dart';
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import 'package:aves/widgets/navigation/drawer/app_drawer.dart';
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import 'package:aves_model/aves_model.dart';
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import 'package:collection/collection.dart';
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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/scheduler.dart';
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import 'package:flutter_staggered_animations/flutter_staggered_animations.dart';
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import 'package:provider/provider.dart';
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class ExplorerPage extends StatefulWidget {
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static const routeName = '/explorer';
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final String? path;
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const ExplorerPage({super.key, this.path});
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@override
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State<ExplorerPage> createState() => _ExplorerPageState();
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}
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class _ExplorerPageState extends State<ExplorerPage> {
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final List<StreamSubscription> _subscriptions = [];
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final ValueNotifier<VolumeRelativeDirectory> _directory = ValueNotifier(const VolumeRelativeDirectory(volumePath: '', relativeDir: ''));
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final ValueNotifier<List<Directory>> _contents = ValueNotifier([]);
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Set<StorageVolume> get _volumes => androidFileUtils.storageVolumes;
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String get _currentDirectoryPath {
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final dir = _directory.value;
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return pContext.join(dir.volumePath, dir.relativeDir);
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}
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@override
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void initState() {
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super.initState();
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final path = widget.path;
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if (path != null && androidFileUtils.getStorageVolume(path) != null) {
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_goTo(path);
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} else {
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final primaryVolume = _volumes.firstWhereOrNull((v) => v.isPrimary);
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if (primaryVolume != null) {
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_goTo(primaryVolume.path);
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}
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}
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_contents.addListener(() => PrimaryScrollController.of(context).jumpTo(0));
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WidgetsBinding.instance.addPostFrameCallback((_) {
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final source = context.read<CollectionSource>();
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_subscriptions.add(source.eventBus.on<AlbumsChangedEvent>().listen((event) => _updateContents()));
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});
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}
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@override
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void dispose() {
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_subscriptions
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..forEach((sub) => sub.cancel())
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..clear();
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_directory.dispose();
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_contents.dispose();
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super.dispose();
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}
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@override
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Widget build(BuildContext context) {
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return ValueListenableBuilder<VolumeRelativeDirectory>(
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valueListenable: _directory,
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builder: (context, directory, child) {
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final atRoot = directory.relativeDir.isEmpty;
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return AvesPopScope(
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handlers: [
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APopHandler(
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canPop: (context) => atRoot,
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onPopBlocked: (context) => _goTo(pContext.dirname(_currentDirectoryPath)),
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),
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tvNavigationPopHandler,
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doubleBackPopHandler,
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],
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child: AvesScaffold(
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drawer: const AppDrawer(),
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body: GestureAreaProtectorStack(
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child: Column(
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children: [
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Expanded(
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child: ValueListenableBuilder<List<Directory>>(
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valueListenable: _contents,
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builder: (context, contents, child) {
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final durations = context.watch<DurationsData>();
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return CustomScrollView(
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// workaround to prevent scrolling the app bar away
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// when there is no content and we use `SliverFillRemaining`
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physics: contents.isEmpty ? const NeverScrollableScrollPhysics() : null,
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slivers: [
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ExplorerAppBar(
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key: const Key('appbar'),
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directoryNotifier: _directory,
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goTo: _goTo,
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),
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AnimationLimiter(
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// animation limiter should not be above the app bar
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// so that the crumb line can automatically scroll
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key: ValueKey(_currentDirectoryPath),
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child: SliverList.builder(
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itemBuilder: (context, index) {
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return AnimationConfiguration.staggeredList(
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position: index,
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duration: durations.staggeredAnimation,
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delay: durations.staggeredAnimationDelay * timeDilation,
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child: SlideAnimation(
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verticalOffset: 50.0,
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child: FadeInAnimation(
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child: _buildContentLine(context, contents[index]),
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),
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),
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);
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},
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itemCount: contents.length,
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),
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),
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contents.isEmpty
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? SliverFillRemaining(
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child: _buildEmptyContent(),
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)
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: const SliverPadding(padding: EdgeInsets.only(bottom: 8)),
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],
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);
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},
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),
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),
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const Divider(height: 0),
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SafeArea(
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top: false,
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bottom: true,
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child: Padding(
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padding: const EdgeInsets.all(8),
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child: AvesFilterChip(
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filter: PathFilter(_currentDirectoryPath),
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maxWidth: double.infinity,
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onTap: (filter) => _goToCollectionPage(context, filter),
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onLongPress: null,
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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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),
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);
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},
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);
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}
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Widget _buildEmptyContent() {
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return Selector<CollectionSource, bool>(
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selector: (context, source) => source.state == SourceState.loading,
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builder: (context, loading, child) {
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Widget? bottom;
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if (loading) {
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bottom = const CircularProgressIndicator();
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} else {
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final source = context.read<CollectionSource>();
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final album = _getAlbumPath(source, Directory(_currentDirectoryPath));
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if (album != null) {
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bottom = AvesFilterChip(
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filter: AlbumFilter(album, source.getAlbumDisplayName(context, album)),
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maxWidth: double.infinity,
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onTap: (filter) => _goToCollectionPage(context, filter),
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onLongPress: null,
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);
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}
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}
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return SafeArea(
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top: false,
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bottom: false,
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child: Padding(
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padding: const EdgeInsets.all(8),
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child: Center(
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child: EmptyContent(
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icon: AIcons.folder,
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text: '',
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bottom: bottom,
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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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}
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String? _getAlbumPath(CollectionSource source, FileSystemEntity content) {
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final contentPath = content.path.toLowerCase();
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return source.rawAlbums.firstWhereOrNull((v) => v.toLowerCase() == contentPath);
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}
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Widget _buildContentLine(BuildContext context, FileSystemEntity content) {
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final source = context.read<CollectionSource>();
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final album = _getAlbumPath(source, content);
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final baseIconTheme = IconTheme.of(context);
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const leadingDim = AvesFilterChip.minChipWidth;
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return ListTile(
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leading: album != null
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? IconTheme.merge(
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data: baseIconTheme,
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child: AvesFilterChip(
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filter: AlbumFilter(album, source.getAlbumDisplayName(context, album)),
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showText: false,
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maxWidth: leadingDim,
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onTap: (filter) => _goToCollectionPage(context, filter),
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onLongPress: null,
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),
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)
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: const SizedBox(
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width: leadingDim,
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height: leadingDim,
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child: Icon(AIcons.folder),
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),
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title: Text('${Unicode.FSI}${pContext.split(content.path).last}${Unicode.PDI}'),
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onTap: () => _goTo(content.path),
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);
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}
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void _goTo(String path) {
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final dir = androidFileUtils.relativeDirectoryFromPath(path);
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if (dir != null) {
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_directory.value = dir;
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_updateContents();
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}
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}
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void _updateContents() {
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final contents = <Directory>[];
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final source = context.read<CollectionSource>();
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final albums = source.rawAlbums.map((v) => v.toLowerCase()).toSet();
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Directory(_currentDirectoryPath).list().listen((event) {
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final entity = event.absolute;
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if (entity is Directory) {
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final dirPath = entity.path.toLowerCase();
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if (albums.any((v) => v.startsWith(dirPath))) {
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contents.add(entity);
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}
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}
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}, onDone: () {
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_contents.value = contents
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..sort((a, b) {
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final nameA = pContext.split(a.path).last;
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final nameB = pContext.split(b.path).last;
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return compareAsciiUpperCaseNatural(nameA, nameB);
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});
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});
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}
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void _goToCollectionPage(BuildContext context, CollectionFilter filter) {
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Navigator.maybeOf(context)?.push(
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MaterialPageRoute(
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settings: const RouteSettings(name: CollectionPage.routeName),
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builder: (context) => CollectionPage(
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source: context.read<CollectionSource>(),
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filters: {filter},
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),
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),
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);
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}
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}
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