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import 'dart:typed_data';
import 'package:flutter/material.dart';
import '../core/android_core.dart';
import '../l10n/app_localizations.dart';
/// Android, per-app proxy (v2rayN's words): bypass the selected apps, or
/// proxy only the selected apps. The routing region's list (Iran's banks,
/// messengers, and the like) is a suggestion: checked at first, and again
/// with "Suggested apps", never forced. The choice is kept by the app
/// (CoreService.kt) and applied when the page closes.
class BypassAppsPage extends StatefulWidget {
const BypassAppsPage({super.key, this.region});
/// The routing region's name while routing is on; its apps are marked.
final String? region;
@override
State<BypassAppsPage> createState() => _BypassAppsPageState();
}
class _BypassAppsPageState extends State<BypassAppsPage> {
List<InstalledApp>? _apps;
AppRouting? _routing;
/// The choice when the page opened, to know whether to apply it.
String _initial = '';
String _query = '';
final Map<String, Future<Uint8List?>> _icons = {};
@override
void initState() {
super.initState();
_load();
}
Future<void> _load() async {
final apps = await AndroidCore.installedApps();
final routing = await AndroidCore.appRouting();
if (!mounted) return;
setState(() {
_routing = routing;
_initial = routing.key;
_apps = apps;
_sort();
});
}
/// The checked apps first, then by name.
void _sort() {
final r = _routing!;
_apps!.sort((a, b) {
final ca = r.checked(a.package), cb = r.checked(b.package);
if (ca != cb) return ca ? -1 : 1;
return a.label.toLowerCase().compareTo(b.label.toLowerCase());
});
}
void _save() => AndroidCore.setAppRouting(_routing!, apply: false);
@override
Widget build(BuildContext context) {
final l = AppLocalizations.of(context);
final theme = Theme.of(context);
final routing = _routing;
final q = _query.trim().toLowerCase();
final apps = [
for (final a in _apps ?? const <InstalledApp>[])
if (q.isEmpty ||
a.label.toLowerCase().contains(q) ||
a.package.toLowerCase().contains(q))
a,
];
return PopScope(
onPopInvokedWithResult: (didPop, _) {
// Applied once: the VPN is set up again with the new choice.
if (didPop && routing != null && routing.key != _initial) {
AndroidCore.setAppRouting(routing, apply: true);
}
},
child: Scaffold(
appBar: AppBar(title: Text(l.bypassApps)),
body: routing == null || _apps == null
? const Center(child: CircularProgressIndicator())
: ListView.builder(
itemCount: apps.length + 1,
itemBuilder: (context, i) {
if (i == 0) {
return Padding(
padding: const EdgeInsets.fromLTRB(16, 8, 16, 8),
child: Column(
crossAxisAlignment: CrossAxisAlignment.stretch,
children: [
SegmentedButton<bool>(
showSelectedIcon: false,
segments: [
ButtonSegment(
value: false,
label: Text(l.appModeExclude),
),
ButtonSegment(
value: true,
label: Text(l.appModeInclude),
),
],
selected: {routing.onlyChosen},
onSelectionChanged: (v) {
setState(() {
routing.onlyChosen = v.first;
_sort();
});
_save();
},
),
const SizedBox(height: 10),
Text(
routing.onlyChosen
? l.appModeIncludeHint
: l.appModeExcludeHint,
style: theme.textTheme.bodySmall?.copyWith(
color: theme.colorScheme.onSurfaceVariant,
),
),
if (!routing.onlyChosen &&
routing.suggested.isNotEmpty) ...[
const SizedBox(height: 8),
Align(
alignment: AlignmentDirectional.centerStart,
child: OutlinedButton.icon(
onPressed: () {
final added = routing.checkSuggested(
_apps!.map((a) => a.package),
);
setState(_sort);
_save();
ScaffoldMessenger.of(context).showSnackBar(
SnackBar(
content: Text(l.suggestedAdded(added)),
behavior: SnackBarBehavior.floating,
),
);
},
icon: const Icon(Icons.auto_awesome_rounded),
label: Text(l.suggestedApps),
),
),
],
const SizedBox(height: 12),
TextField(
decoration: InputDecoration(
isDense: true,
prefixIcon: const Icon(Icons.search_rounded),
hintText: l.search,
border: const OutlineInputBorder(),
),
onChanged: (v) => setState(() => _query = v),
),
],
),
);
}
final app = apps[i - 1];
final onList =
widget.region != null &&
routing.suggested.contains(app.package);
final icon = _icons.putIfAbsent(
app.package,
() => AndroidCore.appIcon(app.package),
);
return CheckboxListTile(
value: routing.checked(app.package),
onChanged: (v) {
setState(() => routing.toggle(app.package, v ?? false));
_save();
},
secondary: SizedBox.square(
dimension: 40,
child: FutureBuilder<Uint8List?>(
future: icon,
builder: (context, snap) => snap.data == null
? const Icon(Icons.android_rounded)
: Image.memory(snap.data!, gaplessPlayback: true),
),
),
title: Text(app.label),
subtitle: Text(
onList ? l.fromRegionList(widget.region!) : app.package,
style: theme.textTheme.bodySmall?.copyWith(
color: onList ? theme.colorScheme.primary : null,
),
overflow: TextOverflow.ellipsis,
),
);
},
),
),
);
}
}
arblant