488 lines
14 KiB
Dart
488 lines
14 KiB
Dart
// @dart=2.9
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import 'dart:async';
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import 'dart:math';
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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/rendering.dart';
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import 'package:flutter/services.dart';
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import 'package:logging/logging.dart';
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import 'package:photos/core/constants.dart';
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import 'package:photos/core/event_bus.dart';
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import 'package:photos/events/files_updated_event.dart';
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import 'package:photos/models/file.dart';
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import 'package:photos/models/selected_files.dart';
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import 'package:photos/theme/ente_theme.dart';
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import 'package:photos/ui/huge_listview/place_holder_widget.dart';
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import 'package:photos/ui/viewer/file/detail_page.dart';
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import 'package:photos/ui/viewer/file/thumbnail_widget.dart';
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import 'package:photos/ui/viewer/gallery/gallery.dart';
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import 'package:photos/utils/date_time_util.dart';
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import 'package:photos/utils/navigation_util.dart';
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import 'package:visibility_detector/visibility_detector.dart';
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class LazyLoadingGallery extends StatefulWidget {
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final List<File> files;
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final int index;
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final Stream<FilesUpdatedEvent> reloadEvent;
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final Set<EventType> removalEventTypes;
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final GalleryLoader asyncLoader;
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final SelectedFiles selectedFiles;
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final String tag;
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final String logTag;
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final Stream<int> currentIndexStream;
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final bool smallerTodayFont;
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LazyLoadingGallery(
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this.files,
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this.index,
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this.reloadEvent,
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this.removalEventTypes,
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this.asyncLoader,
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this.selectedFiles,
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this.tag,
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this.currentIndexStream, {
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this.smallerTodayFont,
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this.logTag = "",
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Key key,
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}) : super(key: key ?? UniqueKey());
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@override
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State<LazyLoadingGallery> createState() => _LazyLoadingGalleryState();
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}
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class _LazyLoadingGalleryState extends State<LazyLoadingGallery> {
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static const kSubGalleryItemLimit = 80;
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static const kRecycleLimit = 400;
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static const kNumberOfDaysToRenderBeforeAndAfter = 8;
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Logger _logger;
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List<File> _files;
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StreamSubscription<FilesUpdatedEvent> _reloadEventSubscription;
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StreamSubscription<int> _currentIndexSubscription;
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bool _shouldRender;
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final ValueNotifier<bool> _shouldSelectAll = ValueNotifier(false);
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final ValueNotifier<bool> _showSelectAllButton = ValueNotifier(false);
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@override
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void initState() {
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//this is for removing the 'select all from day' icon on unselecting all files with 'cancel'
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widget.selectedFiles.addListener(_selectedFilesListener);
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super.initState();
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_init();
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}
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void _init() {
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_logger = Logger("LazyLoading_${widget.logTag}");
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_shouldRender = true;
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_files = widget.files;
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_reloadEventSubscription = widget.reloadEvent.listen((e) => _onReload(e));
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_currentIndexSubscription =
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widget.currentIndexStream.listen((currentIndex) {
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final bool shouldRender = (currentIndex - widget.index).abs() <
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kNumberOfDaysToRenderBeforeAndAfter;
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if (mounted && shouldRender != _shouldRender) {
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setState(() {
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_shouldRender = shouldRender;
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});
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}
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});
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}
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Future _onReload(FilesUpdatedEvent event) async {
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final galleryDate =
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DateTime.fromMicrosecondsSinceEpoch(_files[0].creationTime);
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final filesUpdatedThisDay = event.updatedFiles.where((file) {
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final fileDate = DateTime.fromMicrosecondsSinceEpoch(file.creationTime);
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return fileDate.year == galleryDate.year &&
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fileDate.month == galleryDate.month &&
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fileDate.day == galleryDate.day;
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});
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if (filesUpdatedThisDay.isNotEmpty) {
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if (kDebugMode) {
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_logger.info(
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filesUpdatedThisDay.length.toString() +
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" files were updated due to ${event.reason} on " +
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getDayTitle(galleryDate.microsecondsSinceEpoch),
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);
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}
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if (event.type == EventType.addedOrUpdated) {
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final dayStartTime =
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DateTime(galleryDate.year, galleryDate.month, galleryDate.day);
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final result = await widget.asyncLoader(
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dayStartTime.microsecondsSinceEpoch,
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dayStartTime.microsecondsSinceEpoch + microSecondsInDay - 1,
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);
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if (mounted) {
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setState(() {
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_files = result.files;
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});
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}
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} else if (widget.removalEventTypes.contains(event.type)) {
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// Files were removed
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final generatedFileIDs = <int>{};
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final uploadedFileIds = <int>{};
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for (final file in filesUpdatedThisDay) {
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if (file.generatedID != null) {
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generatedFileIDs.add(file.generatedID);
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} else if (file.uploadedFileID != null) {
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uploadedFileIds.add(file.uploadedFileID);
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}
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}
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final List<File> files = [];
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files.addAll(_files);
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files.removeWhere(
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(file) =>
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generatedFileIDs.contains(file.generatedID) ||
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uploadedFileIds.contains(file.uploadedFileID),
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);
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if (kDebugMode) {
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_logger.finest(
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"removed ${_files.length - files.length} due to ${event.reason}",
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);
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}
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if (mounted) {
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setState(() {
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_files = files;
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});
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}
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} else {
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if (kDebugMode) {
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debugPrint("Unexpected event ${event.type.name}");
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}
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}
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}
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}
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@override
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void dispose() {
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_reloadEventSubscription.cancel();
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_currentIndexSubscription.cancel();
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widget.selectedFiles.removeListener(_selectedFilesListener);
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super.dispose();
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}
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@override
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void didUpdateWidget(LazyLoadingGallery oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (!listEquals(_files, widget.files)) {
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_reloadEventSubscription.cancel();
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_init();
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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 (_files.isEmpty) {
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return const SizedBox.shrink();
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}
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return Column(
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children: [
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Padding(
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padding: const EdgeInsets.fromLTRB(4, 14, 12, 8),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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getDayWidget(
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context,
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_files[0].creationTime,
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widget.smallerTodayFont,
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),
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ValueListenableBuilder(
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valueListenable: _showSelectAllButton,
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builder: (context, value, _) {
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return widget.selectedFiles.files.isEmpty
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? const SizedBox.shrink()
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: GestureDetector(
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child: ValueListenableBuilder(
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valueListenable: _shouldSelectAll,
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builder: (context, value, _) {
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return value
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? const Icon(
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Icons.check_circle,
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size: 18,
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)
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: Icon(
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Icons.check_circle_outlined,
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color: getEnteColorScheme(context)
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.strokeMuted,
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size: 18,
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);
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},
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),
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onTap: () {
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_shouldSelectAll.value = !_shouldSelectAll.value;
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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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_shouldRender ? _getGallery() : PlaceHolderWidget(_files.length),
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],
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);
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}
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Widget _getGallery() {
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final List<Widget> childGalleries = [];
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for (int index = 0; index < _files.length; index += kSubGalleryItemLimit) {
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childGalleries.add(
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LazyLoadingGridView(
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widget.tag,
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_files.sublist(
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index,
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min(index + kSubGalleryItemLimit, _files.length),
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),
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widget.asyncLoader,
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widget.selectedFiles,
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index == 0,
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_files.length > kRecycleLimit,
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_shouldSelectAll,
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),
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);
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}
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return Column(
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children: childGalleries,
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);
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}
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void _selectedFilesListener() {
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final filesOfGirdAsSet = widget.files.toSet();
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//to disable the 'all selected' state of the icon when every file is
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//unselected one by one after selecting all using the icon
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if (!widget.selectedFiles.files
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.any((element) => filesOfGirdAsSet.contains(element))) {
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_shouldSelectAll.value = false;
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}
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if (widget.selectedFiles.files.isEmpty) {
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_showSelectAllButton.value = false;
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} else {
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_showSelectAllButton.value = true;
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}
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}
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}
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class LazyLoadingGridView extends StatefulWidget {
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final String tag;
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final List<File> files;
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final GalleryLoader asyncLoader;
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final SelectedFiles selectedFiles;
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final bool shouldRender;
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final bool shouldRecycle;
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final ValueNotifier shouldSelectAll;
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LazyLoadingGridView(
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this.tag,
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this.files,
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this.asyncLoader,
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this.selectedFiles,
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this.shouldRender,
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this.shouldRecycle,
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this.shouldSelectAll, {
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Key key,
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}) : super(key: key ?? UniqueKey());
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@override
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State<LazyLoadingGridView> createState() => _LazyLoadingGridViewState();
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}
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class _LazyLoadingGridViewState extends State<LazyLoadingGridView> {
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bool _shouldRender;
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StreamSubscription<ClearSelectionEvent> _clearSelectionEvent;
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@override
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void initState() {
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_shouldRender = widget.shouldRender;
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widget.shouldSelectAll.addListener(_shouldSelectAllListener);
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widget.selectedFiles.addListener(_selectedFilesListener);
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_clearSelectionEvent =
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Bus.instance.on<ClearSelectionEvent>().listen((event) {
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if (mounted) {
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setState(() {});
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}
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});
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super.initState();
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}
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@override
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void dispose() {
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widget.selectedFiles.removeListener(_selectedFilesListener);
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widget.shouldSelectAll.removeListener(_shouldSelectAllListener);
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_clearSelectionEvent.cancel();
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super.dispose();
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}
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@override
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void didUpdateWidget(LazyLoadingGridView oldWidget) {
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super.didUpdateWidget(oldWidget);
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if (!listEquals(widget.files, oldWidget.files)) {
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_shouldRender = widget.shouldRender;
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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 (widget.shouldRecycle) {
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return _getRecyclableView();
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} else {
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return _getNonRecyclableView();
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}
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}
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Widget _getRecyclableView() {
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return VisibilityDetector(
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key: UniqueKey(),
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onVisibilityChanged: (visibility) {
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final shouldRender = visibility.visibleFraction > 0;
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if (mounted && shouldRender != _shouldRender) {
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setState(() {
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_shouldRender = shouldRender;
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});
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}
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},
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child: _shouldRender
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? _getGridView()
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: PlaceHolderWidget(widget.files.length),
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);
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}
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Widget _getNonRecyclableView() {
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if (!_shouldRender) {
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return VisibilityDetector(
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key: UniqueKey(),
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onVisibilityChanged: (visibility) {
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if (mounted && visibility.visibleFraction > 0 && !_shouldRender) {
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setState(() {
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_shouldRender = true;
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});
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}
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},
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child: PlaceHolderWidget(widget.files.length),
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);
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} else {
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return _getGridView();
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}
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}
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Widget _getGridView() {
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return GridView.builder(
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shrinkWrap: true,
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physics:
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const NeverScrollableScrollPhysics(), // to disable GridView's scrolling
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itemBuilder: (context, index) {
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return _buildFile(context, widget.files[index]);
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},
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itemCount: widget.files.length,
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gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
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crossAxisCount: 4,
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),
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padding: const EdgeInsets.all(0),
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);
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}
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Widget _buildFile(BuildContext context, File file) {
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return GestureDetector(
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onTap: () {
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if (widget.selectedFiles.files.isNotEmpty) {
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_selectFile(file);
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} else {
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_routeToDetailPage(file, context);
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}
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},
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onLongPress: () {
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HapticFeedback.lightImpact();
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_selectFile(file);
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},
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child: Container(
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margin: const EdgeInsets.all(1.5),
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decoration: BoxDecoration(
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borderRadius: BorderRadius.circular(3),
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),
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child: ClipRRect(
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borderRadius: BorderRadius.circular(3),
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child: Stack(
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children: [
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Hero(
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tag: widget.tag + file.tag,
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child: ColorFiltered(
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colorFilter: ColorFilter.mode(
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Colors.black.withOpacity(
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widget.selectedFiles.isFileSelected(file) ? 0.4 : 0,
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),
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BlendMode.darken,
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),
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child: ThumbnailWidget(
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file,
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diskLoadDeferDuration: thumbnailDiskLoadDeferDuration,
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serverLoadDeferDuration: thumbnailServerLoadDeferDuration,
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shouldShowLivePhotoOverlay: true,
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key: Key(widget.tag + file.tag),
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),
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),
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),
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Visibility(
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visible: widget.selectedFiles.isFileSelected(file),
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child: const Positioned(
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right: 4,
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top: 4,
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child: Icon(
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Icons.check_circle_rounded,
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size: 20,
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color: Colors.white, //same for both themes
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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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void _selectFile(File file) {
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widget.selectedFiles.toggleSelection(file);
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}
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void _routeToDetailPage(File file, BuildContext context) {
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final page = DetailPage(
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DetailPageConfiguration(
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List.unmodifiable(widget.files),
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widget.asyncLoader,
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widget.files.indexOf(file),
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widget.tag,
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),
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);
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routeToPage(context, page, forceCustomPageRoute: true);
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}
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void _selectedFilesListener() {
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bool shouldRefresh = false;
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for (final file in widget.files) {
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if (widget.selectedFiles.isPartOfLastSelected(file)) {
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shouldRefresh = true;
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}
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}
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if (shouldRefresh && mounted) {
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setState(() {});
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}
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}
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void _shouldSelectAllListener() {
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if (widget.shouldSelectAll.value && mounted) {
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setState(() {
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widget.selectedFiles.selectAll(widget.files.toSet());
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});
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} else {
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if (mounted) {
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setState(() {
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widget.selectedFiles.unSelectAll(widget.files.toSet());
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});
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}
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}
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}
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}
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