just_stuff_tm
5 months ago
parent
64bf307d09
commit
0f17e2382c
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import 'package:flutter/foundation.dart';
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import '../storage/prefs_manager.dart';
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/// Client-side accessibility/UI service that exposes a persistent shared text scale
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/// factor. No MeshCoreConnector/RoomServer or protocol interaction occurs, and the
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/// value is saved locally via SharedPreferences so it can be reused in Markdown
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/// viewers, log panels, or other text-heavy widgets without redundant network
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/// dependencies.
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///
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/// Widgets should scope rebuilds using the snippet below so only the scaled text
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/// is rebuilt instead of the entire chat list:
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/// ```dart
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/// context.select<ChatTextScaleService, double>(
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/// (service) => service.scale,
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/// )
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/// ```
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class ChatTextScaleService extends ChangeNotifier {
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static const _prefKey = 'chat_text_scale';
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static const double _minScale = 0.8;
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static const double _maxScale = 1.8;
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double _scale = 1.0;
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double get scale => _scale;
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Future<void> initialize() async {
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final stored = PrefsManager.instance.getDouble(_prefKey);
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if (stored != null) {
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_scale = _clamp(stored);
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}
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}
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void setScale(double value) {
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final next = _clamp(value);
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if (next == _scale) return;
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_scale = next;
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PrefsManager.instance.setDouble(_prefKey, _scale);
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notifyListeners();
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}
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void reset() => setScale(1.0);
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double _clamp(double value) => value.clamp(_minScale, _maxScale).toDouble();
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}
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@ -0,0 +1,45 @@
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import 'package:flutter/material.dart';
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import 'package:provider/provider.dart';
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import '../services/chat_text_scale_service.dart';
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/// Gesture wrapper that exposes two-finger pinch-to-zoom for chat scrollables.
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/// Double-tap resets the scale. Only the wrapper itself listens to gestures;
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/// child scrollables keep their normal touch handling.
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class ChatZoomWrapper extends StatelessWidget {
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ChatZoomWrapper({super.key, required this.child, this.onDoubleTap});
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final Widget child;
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final VoidCallback? onDoubleTap;
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final _ZoomGestureState _state = _ZoomGestureState();
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@override
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Widget build(BuildContext context) {
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final service = context.read<ChatTextScaleService>();
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return GestureDetector(
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behavior: HitTestBehavior.translucent,
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onDoubleTap: () {
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service.reset();
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onDoubleTap?.call();
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},
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onScaleStart: (details) {
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if (details.pointerCount != 2) return;
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_state.startScale = service.scale;
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},
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onScaleUpdate: (details) {
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if (details.pointerCount != 2) return;
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final baseScale = _state.startScale ?? service.scale;
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service.setScale(baseScale * details.scale);
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},
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onScaleEnd: (_) {
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_state.startScale = null;
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},
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child: child,
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);
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}
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}
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class _ZoomGestureState {
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double? startScale;
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}
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