todo-app/lib/ui/image_input_io.dart
Krzysztof kuhy Rudnicki 9f2ffdb8a9
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Attach any file to a note, of any size, not only images
📎 now picks any file (Android: Camera / Gallery / File; desktop: an
unfiltered dialog) and the desktop page accepts any dropped file. Photo and
screenshot formats up to 64 MB are still re-encoded and shown inline;
everything else is stored byte for byte on dufs beside the images and linked
as [name](url), shown as a row with its size that opens in the platform's
app (Android) or a new browser tab (desktop). BACKLOG.md rewrites file links
to ~/data/cloud/todo-images/ like image links.

There is no size cap, so no layer holds a file in memory: uploads and
downloads stream through DufsImageClient, writes land in a .tmp renamed when
whole (an interrupted download no longer leaves a truncated file that looks
done), the desktop page POSTs the browser's own Blob with fetch, and Android's
"File" uses file_picker, because file_selector's Android side reads the whole
file into memory on the UI thread. Verified with a 1 GB file end to end on
desktop (peak RSS +36 MB) and on an API 36 emulator.

The wrapper serves attachments from the origin that holds the GitHub token
and the notes, so only script-free types open inline (nosniff), the rest
download; writes carrying another site's Origin are refused (this also
closes cross-site overwrites of the backup files); and attachment routes run
concurrently so a long upload or a playing video cannot stall the page.

Also: cupertino_icons 2.0.0 (unused, but the freshness gate blocks the
pubspec otherwise), open_file 4.0.0 and file_picker 13.1.0 pinned.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-01 12:17:06 +02:00

36 lines
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Dart

import 'dart:typed_data';
import 'package:file_selector/file_selector.dart' show XFile;
import 'package:flutter/widgets.dart';
/// Receives pasted or dropped images and the count of non-image files.
typedef ImageInputCallback =
void Function(List<Uint8List> images, int rejected);
/// Receives dropped files of any type.
typedef FileInputCallback = void Function(List<XFile> files);
/// Off the web there is no document to paste or drop onto (Android attaches
/// through the 📎 button), so this is just [child].
class ImageInputListener extends StatelessWidget {
/// Wraps [child]; [onImages] is never called on this platform.
const ImageInputListener({
required this.onImages,
required this.onFiles,
required this.child,
super.key,
});
/// Unused off the web.
final ImageInputCallback onImages;
/// Unused off the web.
final FileInputCallback onFiles;
/// The screen body.
final Widget child;
@override
Widget build(BuildContext context) => child;
}