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info: improved metadata section build

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This commit is contained in:
Thibault Deckers 2020-01-18 01:53:03 +09:00
parent 04c8c966bd
commit f7c4515210
1 changed files with 89 additions and 54 deletions
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143
lib/widgets/fullscreen/info/metadata_section.dart
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@ -7,6 +7,7 @@ import 'package:aves/widgets/common/fx/highlight_decoration.dart';
import 'package:aves/widgets/fullscreen/info/info_page.dart';
import 'package:flutter/material.dart';
import 'package:flutter_staggered_grid_view/flutter_staggered_grid_view.dart';
import 'package:tuple/tuple.dart';
class MetadataSectionSliver extends StatefulWidget {
final ImageEntry entry;
@ -24,11 +25,15 @@ class MetadataSectionSliver extends StatefulWidget {
}
class _MetadataSectionSliverState extends State<MetadataSectionSliver> with AutomaticKeepAliveClientMixin {
Map _metadata;
List<_MetadataDirectory> _metadata = [];
String _loadedMetadataUri;
int get columnCount => widget.columnCount;
bool get isVisible => widget.visibleNotifier.value;
static const int maxValueLength = 140;
@override
void initState() {
super.initState();
@ -61,31 +66,51 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
@override
Widget build(BuildContext context) {
super.build(context);
final directoryNames = (_metadata?.keys?.toList() ?? [])..sort();
return SliverStaggeredGrid.countBuilder(
crossAxisCount: widget.columnCount,
staggeredTileBuilder: (index) => StaggeredTile.fit(index == 0 ? widget.columnCount : 1),
itemBuilder: (context, index) {
return index == 0
? const SectionRow('Metadata')
: _Directory(
metadataMap: _metadata,
directoryName: directoryNames[index - 1],
);
},
itemCount: directoryNames.isEmpty ? 0 : directoryNames.length + 1,
mainAxisSpacing: 0,
crossAxisSpacing: 8,
);
final itemCount = _metadata.isEmpty ? 0 : _metadata.length + 1;
final itemBuilder = (context, index) => index == 0 ? const SectionRow('Metadata') : _DirectoryWidget(_metadata[index - 1]);
// SliverStaggeredGrid is not as efficient as SliverList when there is only one column
return columnCount == 1
? SliverList(
delegate: SliverChildBuilderDelegate(
itemBuilder,
childCount: itemCount,
),
)
: SliverStaggeredGrid.countBuilder(
crossAxisCount: columnCount,
staggeredTileBuilder: (index) => StaggeredTile.fit(index == 0 ? columnCount : 1),
itemBuilder: itemBuilder,
itemCount: itemCount,
mainAxisSpacing: 0,
crossAxisSpacing: 8,
);
}
Future<void> _getMetadata() async {
if (_loadedMetadataUri == widget.entry.uri) return;
if (isVisible) {
_metadata = await MetadataService.getAllMetadata(widget.entry);
final rawMetadata = await MetadataService.getAllMetadata(widget.entry) ?? {};
_metadata = rawMetadata.entries.map((kv) {
final String directoryName = kv.key as String ?? '';
final Map rawTags = kv.value as Map ?? {};
final List<Tuple2<String, String>> tags = rawTags.entries
.map((kv) {
final value = kv.value as String ?? '';
if (value.isEmpty) return null;
final tagName = kv.key as String ?? '';
return Tuple2(tagName, value.length > maxValueLength ? '${value.substring(0, maxValueLength)}…' : value);
})
.where((tag) => tag != null)
.toList()
..sort((a, b) => a.item1.compareTo(b.item1));
return _MetadataDirectory(directoryName, tags);
}).toList()
..sort((a, b) => a.name.compareTo(b.name));
_loadedMetadataUri = widget.entry.uri;
} else {
_metadata = null;
_metadata = [];
_loadedMetadataUri = null;
}
if (mounted) setState(() {});
@ -95,50 +120,60 @@ class _MetadataSectionSliverState extends State<MetadataSectionSliver> with Auto
bool get wantKeepAlive => true;
}
class _Directory extends StatelessWidget {
final Map metadataMap;
final String directoryName;
class _DirectoryWidget extends StatelessWidget {
final _MetadataDirectory directory;
static const int maxValueLength = 140;
const _Directory({@required this.metadataMap, @required this.directoryName});
const _DirectoryWidget(this.directory);
@override
Widget build(BuildContext context) {
final directory = metadataMap[directoryName];
final tagKeys = directory.keys.toList()..sort();
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (directoryName.isNotEmpty)
Container(
decoration: HighlightDecoration(
color: stringToColor(directoryName),
),
margin: const EdgeInsets.symmetric(vertical: 4.0),
child: Text(
directoryName,
style: const TextStyle(
shadows: [
Shadow(
color: Colors.black,
offset: Offset(1, 1),
blurRadius: 2,
)
],
fontSize: 18,
fontFamily: 'Concourse Caps',
),
),
),
...tagKeys.map((tagKey) {
final value = directory[tagKey] as String;
if (value == null || value.isEmpty) return const SizedBox.shrink();
return InfoRow(tagKey, value.length > maxValueLength ? '${value.substring(0, maxValueLength)}…' : value);
}),
if (directory.name.isNotEmpty) _DirectoryTitle(directory.name),
...directory.tags.map((tag) => InfoRow(tag.item1, tag.item2)),
const SizedBox(height: 16),
],
);
}
}
class _DirectoryTitle extends StatelessWidget {
final String name;
const _DirectoryTitle(this.name);
@override
Widget build(BuildContext context) {
return Align(
alignment: Alignment.centerLeft,
child: Container(
decoration: HighlightDecoration(
color: stringToColor(name),
),
margin: const EdgeInsets.symmetric(vertical: 4.0),
child: Text(
name,
style: const TextStyle(
shadows: [
Shadow(
color: Colors.black,
offset: Offset(1, 1),
blurRadius: 2,
)
],
fontSize: 18,
fontFamily: 'Concourse Caps',
),
),
),
);
}
}
class _MetadataDirectory {
final String name;
final List<Tuple2<String, String>> tags;
const _MetadataDirectory(this.name, this.tags);
}