Julius Joska
8081d98c67
Initial public release. Anonymous on-device identity (no phone number, e-mail, or password), Signal-protocol cryptography (X3DH + PQXDH, Double Ratchet, sealed sender) via libsignal, a metadata-minimizing relay, group chats, disappearing messages, encrypted local storage, optional Tor transport, and a UI localized into Czech, English, German, Russian, and Italian. Monorepo: Flutter client (app/), Rust relay + wire types (rust/), protobuf definitions (proto/), self-host deploy (deploy/). Licensed under AGPL-3.0 with an app-store distribution exception (§7).
96 lines
2.8 KiB
Dart
96 lines
2.8 KiB
Dart
/// Fullscreen prohlížeč obrázkové přílohy.
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///
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/// Plné rozlišení se dešifruje až tady, do PAMĚTI (na disk nikdy).
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/// FLAG_SECURE platí globálně, takže screenshot/škrcení obrazovky
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/// nehrozí ani ve vieweru. Sdílení jde přes systémový share sheet
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/// (XFile.fromData — plaintext jen v cache sdílení).
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library;
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:sepot/core/l10n/l10n.dart';
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import 'package:sepot/core/theme/app_theme.dart';
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import 'package:sepot/models/message.dart';
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import 'package:sepot/providers/messaging_provider.dart';
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import 'package:share_plus/share_plus.dart';
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class ImageViewerScreen extends ConsumerStatefulWidget {
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const ImageViewerScreen({super.key, required this.message});
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final Message message;
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@override
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ConsumerState<ImageViewerScreen> createState() => _ImageViewerScreenState();
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}
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class _ImageViewerScreenState extends ConsumerState<ImageViewerScreen> {
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late final Future<Uint8List?> _decrypted;
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@override
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void initState() {
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super.initState();
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_decrypted = ref
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.read(messagingServiceProvider)
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.loadDecryptedAttachment(widget.message);
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}
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Future<void> _share() async {
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final meta = widget.message.attachment!;
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final ext = meta.mime == 'image/png'
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? 'png'
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: meta.mime == 'image/gif'
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? 'gif'
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: 'jpg';
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final name = context.l10n.attachmentSharedImageFilename(ext);
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final bytes = await _decrypted;
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if (bytes == null) return;
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await Share.shareXFiles([
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XFile.fromData(bytes, name: name, mimeType: meta.mime),
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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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return Scaffold(
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backgroundColor: Colors.black,
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appBar: AppBar(
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backgroundColor: Colors.black,
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iconTheme: const IconThemeData(color: Colors.white),
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actions: [
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IconButton(
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icon: const Icon(Icons.share_outlined),
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onPressed: _share,
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),
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],
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),
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body: FutureBuilder<Uint8List?>(
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future: _decrypted,
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builder: (context, snapshot) {
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if (snapshot.connectionState != ConnectionState.done) {
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return const Center(
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child: CircularProgressIndicator(color: SepotColors.ember),
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);
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}
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final bytes = snapshot.data;
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if (snapshot.hasError || bytes == null) {
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return Center(
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child: Text(
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context.l10n.attachmentDecryptFailed,
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style: const TextStyle(color: Colors.white70),
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),
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);
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}
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return InteractiveViewer(
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maxScale: 6,
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child: Center(
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child: Image.memory(bytes, fit: BoxFit.contain),
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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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