213 lines
6.5 KiB
Dart
213 lines
6.5 KiB
Dart
import 'dart:async';
|
|
import 'dart:math';
|
|
|
|
import 'package:flutter/cupertino.dart';
|
|
import 'package:flutter/material.dart';
|
|
import 'package:logging/logging.dart';
|
|
import 'package:photos/events/files_updated_event.dart';
|
|
import 'package:photos/models/file.dart';
|
|
import 'package:photos/models/selected_files.dart';
|
|
import 'package:photos/ui/common_elements.dart';
|
|
import 'package:photos/ui/gallery_app_bar_widget.dart';
|
|
import 'package:photos/ui/huge_listview/huge_listview.dart';
|
|
import 'package:photos/ui/huge_listview/lazy_loading_gallery.dart';
|
|
import 'package:photos/ui/huge_listview/place_holder_widget.dart';
|
|
import 'package:photos/ui/loading_photos_widget.dart';
|
|
import 'package:photos/ui/loading_widget.dart';
|
|
import 'package:photos/utils/date_time_util.dart';
|
|
import 'package:scrollable_positioned_list/scrollable_positioned_list.dart';
|
|
|
|
class Gallery extends StatefulWidget {
|
|
final Future<List<File>> Function(int creationStartTime, int creationEndTime,
|
|
{int limit}) asyncLoader;
|
|
final Stream<FilesUpdatedEvent> reloadEvent;
|
|
final SelectedFiles selectedFiles;
|
|
final String tagPrefix;
|
|
final Widget headerWidget;
|
|
final bool isHomePageGallery;
|
|
|
|
Gallery({
|
|
@required this.asyncLoader,
|
|
@required this.selectedFiles,
|
|
@required this.tagPrefix,
|
|
this.reloadEvent,
|
|
this.headerWidget,
|
|
this.isHomePageGallery = false,
|
|
});
|
|
|
|
@override
|
|
_GalleryState createState() {
|
|
return _GalleryState();
|
|
}
|
|
}
|
|
|
|
class _GalleryState extends State<Gallery> {
|
|
static const int kPageSize = 10;
|
|
static const int kInitialLoadLimit = 100;
|
|
|
|
final _hugeListViewKey = GlobalKey<HugeListViewState>();
|
|
|
|
Logger _logger;
|
|
int _pageIndex = 0;
|
|
List<List<File>> _collatedFiles = [];
|
|
bool _hasLoadedFiles = false;
|
|
StreamSubscription<FilesUpdatedEvent> _reloadEventSubscription;
|
|
|
|
@override
|
|
void initState() {
|
|
_logger = Logger("Gallery_" + widget.tagPrefix);
|
|
if (widget.reloadEvent != null) {
|
|
_reloadEventSubscription = widget.reloadEvent.listen((event) {
|
|
_logger.info("Building gallery because reload event fired");
|
|
_loadFiles();
|
|
});
|
|
}
|
|
widget.selectedFiles.addListener(() {
|
|
_logger.info("Building gallery because selected files updated");
|
|
setState(() {});
|
|
});
|
|
_loadFiles(limit: kInitialLoadLimit).then((value) => _loadFiles());
|
|
super.initState();
|
|
}
|
|
|
|
Future<bool> _loadFiles({int limit}) async {
|
|
_logger.info("Loading files");
|
|
final files = await widget
|
|
.asyncLoader(0, DateTime.now().microsecondsSinceEpoch, limit: limit);
|
|
final collatedFiles = _collateFiles(files);
|
|
if (_collatedFiles.length != collatedFiles.length) {
|
|
if (mounted) {
|
|
_logger.info("New day discovered");
|
|
setState(() {
|
|
_hasLoadedFiles = true;
|
|
_collatedFiles = collatedFiles;
|
|
});
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
@override
|
|
void dispose() {
|
|
_reloadEventSubscription.cancel();
|
|
super.dispose();
|
|
}
|
|
|
|
@override
|
|
Widget build(BuildContext context) {
|
|
_logger.info("Building " + widget.tagPrefix);
|
|
if (!_hasLoadedFiles) {
|
|
return const LoadingPhotosWidget();
|
|
}
|
|
var gallery = _getListView();
|
|
if (widget.isHomePageGallery) {
|
|
gallery = Container(
|
|
margin: const EdgeInsets.only(bottom: 50),
|
|
child: gallery,
|
|
);
|
|
if (widget.selectedFiles.files.isNotEmpty) {
|
|
gallery = Stack(children: [
|
|
gallery,
|
|
Container(
|
|
height: 60,
|
|
child: GalleryAppBarWidget(
|
|
GalleryAppBarType.homepage,
|
|
null,
|
|
widget.selectedFiles,
|
|
),
|
|
),
|
|
]);
|
|
}
|
|
}
|
|
return gallery;
|
|
}
|
|
|
|
Widget _getListView() {
|
|
return HugeListView<List<File>>(
|
|
key: _hugeListViewKey,
|
|
controller: ItemScrollController(),
|
|
pageSize: kPageSize,
|
|
startIndex: _pageIndex,
|
|
totalCount: _collatedFiles.length,
|
|
isDraggableScrollbarEnabled: _collatedFiles.length > 30,
|
|
page: (pageIndex) {
|
|
_pageIndex = pageIndex;
|
|
final endTimeIndex =
|
|
min(pageIndex * kPageSize, _collatedFiles.length - 1);
|
|
final startTimeIndex =
|
|
min((pageIndex + 1) * kPageSize, _collatedFiles.length - 1);
|
|
return _collatedFiles.sublist(endTimeIndex, startTimeIndex);
|
|
},
|
|
placeholderBuilder: (context, pageIndex) {
|
|
var day = getDayWidget(_collatedFiles[pageIndex][0].creationTime);
|
|
return Padding(
|
|
padding: const EdgeInsets.only(bottom: 12),
|
|
child: Column(
|
|
children: [
|
|
day,
|
|
PlaceHolderWidget(_collatedFiles[pageIndex].length),
|
|
],
|
|
),
|
|
);
|
|
},
|
|
waitBuilder: (_) {
|
|
return loadWidget;
|
|
},
|
|
emptyResultBuilder: (_) {
|
|
return nothingToSeeHere;
|
|
},
|
|
itemBuilder: (context, index, files) {
|
|
var gallery;
|
|
gallery = LazyLoadingGallery(
|
|
files,
|
|
widget.reloadEvent,
|
|
widget.asyncLoader,
|
|
widget.selectedFiles,
|
|
widget.tagPrefix,
|
|
);
|
|
if (widget.headerWidget != null && index == 0) {
|
|
gallery = Column(children: [widget.headerWidget, gallery]);
|
|
}
|
|
return gallery;
|
|
},
|
|
labelTextBuilder: (int index) {
|
|
return getMonthAndYear(DateTime.fromMicrosecondsSinceEpoch(
|
|
_collatedFiles[index][0].creationTime));
|
|
},
|
|
thumbBackgroundColor: Color(0xFF151515),
|
|
thumbDrawColor: Colors.white.withOpacity(0.5),
|
|
velocityThreshold: 128,
|
|
);
|
|
}
|
|
|
|
List<List<File>> _collateFiles(List<File> files) {
|
|
final List<File> dailyFiles = [];
|
|
final List<List<File>> collatedFiles = [];
|
|
for (int index = 0; index < files.length; index++) {
|
|
if (index > 0 &&
|
|
!_areFromSameDay(
|
|
files[index - 1].creationTime, files[index].creationTime)) {
|
|
final List<File> collatedDailyFiles = [];
|
|
collatedDailyFiles.addAll(dailyFiles);
|
|
collatedFiles.add(collatedDailyFiles);
|
|
dailyFiles.clear();
|
|
}
|
|
dailyFiles.add(files[index]);
|
|
}
|
|
if (dailyFiles.isNotEmpty) {
|
|
collatedFiles.add(dailyFiles);
|
|
}
|
|
collatedFiles
|
|
.sort((a, b) => b[0].creationTime.compareTo(a[0].creationTime));
|
|
return collatedFiles;
|
|
}
|
|
|
|
bool _areFromSameDay(int firstCreationTime, int secondCreationTime) {
|
|
var firstDate = DateTime.fromMicrosecondsSinceEpoch(firstCreationTime);
|
|
var secondDate = DateTime.fromMicrosecondsSinceEpoch(secondCreationTime);
|
|
return firstDate.year == secondDate.year &&
|
|
firstDate.month == secondDate.month &&
|
|
firstDate.day == secondDate.day;
|
|
}
|
|
}
|