generated from dellevin/template
优化项目结构
This commit is contained in:
DelLevin-Home
217
lib/services/epub/reader_settings.dart
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217
lib/services/epub/reader_settings.dart
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import 'package:flutter/material.dart';
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import 'package:shared_preferences/shared_preferences.dart';
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import 'epub_theme.dart';
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/// Controls how the reader handles external link taps.
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enum ReaderLinkHandling { ask, always, never }
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/// Controls the page-turning animation style.
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enum ReaderPageAnimation { none, slide }
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class ReaderSettings {
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final double zoom;
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final bool followAppTheme;
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final double marginTop;
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final double marginBottom;
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final double marginLeft;
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final double marginRight;
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final ReaderLinkHandling linkHandling;
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final ReaderPageAnimation pageAnimation;
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/// File name (with extension) of the user-imported font to use, or null to
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/// use the epub's own fonts.
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final String? fontFileName;
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/// When true the custom font overrides the epub's own font-family rules.
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final bool overrideFontFamily;
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/// When true, volume up/down keys turn pages in the reader.
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final bool volumeKeyTurnsPage;
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/// Reader theme preset index (0 = follow app, 1-8 = presets, 9 = custom).
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final int themeIndex;
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/// Custom background color (ARGB int), used when themeIndex == 9.
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final int customBgColor;
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/// Custom text color (ARGB int), used when themeIndex == 9.
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final int customTextColor;
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const ReaderSettings({
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this.zoom = 1.0,
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this.followAppTheme = true,
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this.marginTop = 16.0,
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this.marginBottom = 16.0,
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this.marginLeft = 16.0,
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this.marginRight = 16.0,
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this.linkHandling = ReaderLinkHandling.ask,
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this.pageAnimation = ReaderPageAnimation.slide,
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this.fontFileName,
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this.overrideFontFamily = false,
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this.volumeKeyTurnsPage = false,
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this.themeIndex = 0,
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this.customBgColor = 0xFFFFFFFF,
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this.customTextColor = 0xFF1A1A1A,
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});
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// Sentinel: lets copyWith(fontFileName: null) mean "set to null" rather than
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// "leave unchanged". Used only for the nullable fontFileName field.
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static const Object _kUnset = Object();
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ReaderSettings copyWith({
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double? zoom,
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bool? followAppTheme,
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double? marginTop,
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double? marginBottom,
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double? marginLeft,
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double? marginRight,
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ReaderLinkHandling? linkHandling,
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ReaderPageAnimation? pageAnimation,
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Object? fontFileName = _kUnset,
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bool? overrideFontFamily,
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bool? volumeKeyTurnsPage,
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int? themeIndex,
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int? customBgColor,
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int? customTextColor,
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}) {
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return ReaderSettings(
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zoom: zoom ?? this.zoom,
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followAppTheme: followAppTheme ?? this.followAppTheme,
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marginTop: marginTop ?? this.marginTop,
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marginBottom: marginBottom ?? this.marginBottom,
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marginLeft: marginLeft ?? this.marginLeft,
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marginRight: marginRight ?? this.marginRight,
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linkHandling: linkHandling ?? this.linkHandling,
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pageAnimation: pageAnimation ?? this.pageAnimation,
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fontFileName: identical(fontFileName, _kUnset)
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? this.fontFileName
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: fontFileName as String?,
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overrideFontFamily: overrideFontFamily ?? this.overrideFontFamily,
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volumeKeyTurnsPage: volumeKeyTurnsPage ?? this.volumeKeyTurnsPage,
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themeIndex: themeIndex ?? this.themeIndex,
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customBgColor: customBgColor ?? this.customBgColor,
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customTextColor: customTextColor ?? this.customTextColor,
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);
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}
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EpubTheme toEpubTheme(BuildContext context) {
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ColorScheme colorScheme;
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bool shouldOverride = true;
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if (themeIndex == 0) {
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// 跟随 App 主题
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colorScheme = Theme.of(context).colorScheme;
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} else {
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Color bg;
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Color text;
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bool isDark;
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if (themeIndex == 9) {
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// 自定义颜色
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bg = Color(customBgColor);
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text = Color(customTextColor);
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isDark = ThemeData.estimateBrightnessForColor(bg) == Brightness.dark;
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} else if (themeIndex >= 1 &&
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themeIndex <= ReaderThemePresets.presets.length) {
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final preset = ReaderThemePresets.presets[themeIndex];
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bg = preset.surface;
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text = preset.onSurface;
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isDark = preset.isDark;
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} else {
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colorScheme = Theme.of(context).colorScheme;
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return EpubTheme(
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zoom: zoom,
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shouldOverrideTextColor: true,
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colorScheme: colorScheme,
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padding: EdgeInsets.only(
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top: marginTop, bottom: marginBottom,
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left: marginLeft, right: marginRight,
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),
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fontFileName: fontFileName,
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overrideFontFamily: overrideFontFamily,
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);
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}
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colorScheme = ColorScheme(
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brightness: isDark ? Brightness.dark : Brightness.light,
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primary: text,
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onPrimary: bg,
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secondary: text,
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onSecondary: bg,
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error: const Color(0xFFDC2626),
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onError: bg,
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surface: bg,
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onSurface: text,
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surfaceContainerHighest: isDark ? const Color(0xFF2A2A2A) : const Color(0xFFF0F0F0),
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surfaceContainerHigh: isDark ? const Color(0xFF222222) : const Color(0xFFFAFAFA),
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surfaceContainer: isDark ? const Color(0xFF1E1E1E) : const Color(0xFFF5F5F5),
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surfaceContainerLow: isDark ? const Color(0xFF1A1A1A) : const Color(0xFFFAFAFA),
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outline: isDark ? const Color(0xFF444444) : const Color(0xFFCCCCCC),
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outlineVariant: isDark ? const Color(0xFF333333) : const Color(0xFFE5E5E5),
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onSurfaceVariant: isDark ? const Color(0xFFAAAAAA) : const Color(0xFF666666),
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primaryContainer: isDark ? const Color(0xFF2A2A2A) : const Color(0xFFF0F0F0),
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);
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}
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return EpubTheme(
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zoom: zoom,
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shouldOverrideTextColor: shouldOverride,
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colorScheme: colorScheme,
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padding: EdgeInsets.only(
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top: marginTop, bottom: marginBottom,
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left: marginLeft, right: marginRight,
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),
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fontFileName: fontFileName,
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overrideFontFamily: overrideFontFamily,
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);
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}
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// ==================== Persistence ====================
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static const _kPrefix = 'reader_';
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Future<void> save() async {
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final prefs = await SharedPreferences.getInstance();
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await prefs.setDouble('${_kPrefix}zoom', zoom);
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await prefs.setBool('${_kPrefix}followAppTheme', followAppTheme);
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await prefs.setDouble('${_kPrefix}marginTop', marginTop);
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await prefs.setDouble('${_kPrefix}marginBottom', marginBottom);
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await prefs.setDouble('${_kPrefix}marginLeft', marginLeft);
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await prefs.setDouble('${_kPrefix}marginRight', marginRight);
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await prefs.setInt('${_kPrefix}linkHandling', linkHandling.index);
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await prefs.setInt('${_kPrefix}pageAnimation', pageAnimation.index);
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if (fontFileName != null) {
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await prefs.setString('${_kPrefix}fontFileName', fontFileName!);
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} else {
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await prefs.remove('${_kPrefix}fontFileName');
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}
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await prefs.setBool('${_kPrefix}overrideFontFamily', overrideFontFamily);
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await prefs.setBool('${_kPrefix}volumeKeyTurnsPage', volumeKeyTurnsPage);
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await prefs.setInt('${_kPrefix}themeIndex', themeIndex);
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await prefs.setInt('${_kPrefix}customBgColor', customBgColor);
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await prefs.setInt('${_kPrefix}customTextColor', customTextColor);
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}
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static Future<ReaderSettings> load() async {
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final prefs = await SharedPreferences.getInstance();
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return ReaderSettings(
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zoom: prefs.getDouble('${_kPrefix}zoom') ?? 1.0,
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followAppTheme: prefs.getBool('${_kPrefix}followAppTheme') ?? true,
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marginTop: prefs.getDouble('${_kPrefix}marginTop') ?? 16.0,
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marginBottom: prefs.getDouble('${_kPrefix}marginBottom') ?? 16.0,
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marginLeft: prefs.getDouble('${_kPrefix}marginLeft') ?? 16.0,
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marginRight: prefs.getDouble('${_kPrefix}marginRight') ?? 16.0,
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linkHandling: ReaderLinkHandling.values[
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prefs.getInt('${_kPrefix}linkHandling') ??
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ReaderLinkHandling.ask.index],
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pageAnimation: ReaderPageAnimation.values[
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prefs.getInt('${_kPrefix}pageAnimation') ??
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ReaderPageAnimation.slide.index],
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fontFileName: prefs.getString('${_kPrefix}fontFileName'),
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overrideFontFamily:
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prefs.getBool('${_kPrefix}overrideFontFamily') ?? false,
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volumeKeyTurnsPage:
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prefs.getBool('${_kPrefix}volumeKeyTurnsPage') ?? false,
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);
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}
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}
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