121 lines
3.6 KiB
Dart
121 lines
3.6 KiB
Dart
import 'package:flutter/material.dart';
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import 'package:google_fonts/google_fonts.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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class AppFont {
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final String id;
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final String label;
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final String? googleFamily;
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const AppFont({
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required this.id,
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required this.label,
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this.googleFamily,
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});
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bool get isSystem => googleFamily == null;
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bool get isCustom => id.startsWith(AppFonts.customPrefix);
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}
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class AppFonts {
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static const String prefKey = 'app_font';
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static const String scalePrefKey = 'app_font_scale';
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static const String customPrefKey = 'app_custom_fonts';
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static const String customPrefix = 'g:';
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static const double minScale = 0.60;
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static const double maxScale = 1.35;
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static const double defaultScale = 1.0;
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static const List<AppFont> builtIn = [
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AppFont(id: 'system', label: 'Системный'),
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AppFont(id: 'inter', label: 'Inter', googleFamily: 'Inter'),
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AppFont(id: 'unbounded', label: 'Unbounded', googleFamily: 'Unbounded'),
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];
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static AppFont get fallback => builtIn.first;
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static String customId(String family) => '$customPrefix$family';
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static AppFont resolve(String id) {
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if (id.startsWith(customPrefix)) {
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final family = id.substring(customPrefix.length);
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return AppFont(id: id, label: family, googleFamily: family);
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}
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return builtIn.firstWhere((f) => f.id == id, orElse: () => fallback);
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}
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static TextTheme textTheme(String id, TextTheme base) {
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final family = resolve(id).googleFamily;
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if (family == null) return base;
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try {
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return GoogleFonts.getTextTheme(family, base);
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} catch (_) {
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return base;
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}
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}
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static TextStyle sample(String id, {required double fontSize}) {
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final family = resolve(id).googleFamily;
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if (family == null) return TextStyle(fontSize: fontSize);
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try {
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return GoogleFonts.getFont(family, fontSize: fontSize);
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} catch (_) {
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return TextStyle(fontSize: fontSize);
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}
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}
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static double clampScale(double scale) =>
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scale.clamp(minScale, maxScale).toDouble();
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static String? familyFromInput(String input) {
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var value = input.trim();
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if (value.isEmpty) return null;
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final uri = Uri.tryParse(value);
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if (uri != null && uri.host.contains('fonts.google.com')) {
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final idx = uri.pathSegments.indexOf('specimen');
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if (idx != -1 && idx + 1 < uri.pathSegments.length) {
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value = uri.pathSegments[idx + 1];
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}
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}
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try {
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value = Uri.decodeComponent(value);
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} catch (_) {}
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value = value.replaceAll('+', ' ').trim();
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return value.isEmpty ? null : value;
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}
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static String? matchGoogleFamily(String family) {
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final map = GoogleFonts.asMap();
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if (map.containsKey(family)) return family;
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final lower = family.toLowerCase();
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for (final key in map.keys) {
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if (key.toLowerCase() == lower) return key;
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}
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return null;
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}
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static Future<List<String>> loadCustomFamilies() async {
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final prefs = await SharedPreferences.getInstance();
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return prefs.getStringList(customPrefKey) ?? const <String>[];
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}
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static Future<void> addCustomFamily(String family) async {
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final prefs = await SharedPreferences.getInstance();
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final list = prefs.getStringList(customPrefKey) ?? <String>[];
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if (!list.contains(family)) {
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list.add(family);
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await prefs.setStringList(customPrefKey, list);
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}
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}
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static Future<void> removeCustomFamily(String family) async {
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final prefs = await SharedPreferences.getInstance();
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final list = prefs.getStringList(customPrefKey) ?? <String>[];
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list.remove(family);
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await prefs.setStringList(customPrefKey, list);
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}
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}
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