refactor

lib/model/entry/extensions/info.dart

@@ -9,7 +9,7 @@ import 'package:aves/ref/mime_types.dart';
 import 'package:aves/services/common/services.dart';
 import 'package:aves/services/metadata/svg_metadata_service.dart';
 import 'package:aves/theme/colors.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/viewer/info/metadata/metadata_dir.dart';
 import 'package:aves_model/aves_model.dart';
 import 'package:collection/collection.dart';
@@ -115,7 +115,7 @@ extension ExtraAvesEntryInfo on AvesEntry {
           final dirName = [
             'Stream ${index.toString().padLeft(indexDigits, '0')}',
             typeText,
-          ].join(Constants.separator);
+          ].join(AText.separator);
           final formattedStreamTags = VideoMetadataFormatter.formatInfo(stream);
           if (formattedStreamTags.isNotEmpty) {
             final color = colors.fromString(typeText);

lib/model/entry/extensions/props.dart

@@ -3,6 +3,8 @@ import 'dart:ui';
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/ref/mime_types.dart';
+import 'package:aves/ref/unicode.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/android_file_utils.dart';
 
 extension ExtraAvesEntryProps on AvesEntry {
@@ -81,15 +83,12 @@ extension ExtraAvesEntryProps on AvesEntry {
 
   bool get canRemoveMetadata => MimeTypes.canRemoveMetadata(mimeType);
 
-  static const ratioSeparator = '\u2236';
-  static const resolutionSeparator = ' \u00D7 ';
-
   bool get isSized => width > 0 && height > 0;
 
   String get resolutionText {
     final ws = width;
     final hs = height;
-    return isRotated ? '$hs$resolutionSeparator$ws' : '$ws$resolutionSeparator$hs';
+    return isRotated ? '$hs${AText.resolutionSeparator}$ws' : '$ws${AText.resolutionSeparator}$hs';
   }
 
   String get aspectRatioText {
@@ -97,9 +96,9 @@ extension ExtraAvesEntryProps on AvesEntry {
       final gcd = width.gcd(height);
       final w = width ~/ gcd;
       final h = height ~/ gcd;
-      return isRotated ? '$h$ratioSeparator$w' : '$w$ratioSeparator$h';
+      return isRotated ? '$h${Unicode.ratio}$w' : '$w${Unicode.ratio}$h';
     } else {
-      return '?$ratioSeparator?';
+      return '?${Unicode.ratio}?';
     }
   }
 

lib/model/filters/coordinate.dart

@@ -5,7 +5,6 @@ import 'package:aves/model/settings/enums/coordinate_format.dart';
 import 'package:aves/model/settings/enums/enums.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/widgets/aves_app.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves_map/aves_map.dart';
 import 'package:flutter/material.dart';
@@ -61,7 +60,7 @@ class CoordinateFilter extends CollectionFilter {
   bool get exclusiveProp => false;
 
   @override
-  String get universalLabel => _formatBounds(lookupAppLocalizations(AvesApp.supportedLocales.first), CoordinateFormat.decimal);
+  String get universalLabel => _formatBounds(lookupAppLocalizations(AppLocalizations.supportedLocales.first), CoordinateFormat.decimal);
 
   @override
   String getLabel(BuildContext context) => _formatBounds(context.l10n, context.read<Settings>().coordinateFormat);

lib/model/filters/rating.dart

@@ -1,4 +1,5 @@
 import 'package:aves/model/filters/filters.dart';
+import 'package:aves/ref/unicode.dart';
 import 'package:aves/theme/icons.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:flutter/widgets.dart';
@@ -67,7 +68,7 @@ class RatingFilter extends CollectionFilter {
       case 0:
         return context.l10n.filterNoRatingLabel;
       default:
-        return '\u2B50' * rating;
+        return Unicode.whiteMediumStar * rating;
     }
   }
 }

lib/ref/brand_colors.dart

@@ -1,11 +1,11 @@
-import 'package:flutter/painting.dart';
+import 'dart:ui';
 
 class BrandColors {
-  static const Color adobeAfterEffects = Color(0xFF9A9AFF);
+  static const adobeAfterEffects = Color(0xFF9A9AFF);
-  static const Color adobeIllustrator = Color(0xFFFF9B00);
+  static const adobeIllustrator = Color(0xFFFF9B00);
-  static const Color adobePhotoshop = Color(0xFF2DAAFF);
+  static const adobePhotoshop = Color(0xFF2DAAFF);
-  static const Color android = Color(0xFF3DDC84);
+  static const android = Color(0xFF3DDC84);
-  static const Color flutter = Color(0xFF47D1FD);
+  static const flutter = Color(0xFF47D1FD);
 
   static Color? get(String text) {
     switch (text.toLowerCase()) {

lib/ref/poi.dart

@@ -0,0 +1,15 @@
+import 'package:latlong2/latlong.dart';
+
+class PointsOfInterest {
+  static final pointNemo = LatLng(-48.876667, -123.393333);
+
+  static final wonders = [
+    LatLng(29.979167, 31.134167),
+    LatLng(36.451000, 28.223615),
+    LatLng(32.5355, 44.4275),
+    LatLng(31.213889, 29.885556),
+    LatLng(37.0379, 27.4241),
+    LatLng(37.637861, 21.63),
+    LatLng(37.949722, 27.363889),
+  ];
+}

lib/ref/unicode.dart

@@ -0,0 +1,9 @@
+// cf Flutter's `foundation/unicode.dart` for bidi related characters
+class Unicode {
+  static const noBreakSpace = '\u00A0';
+  static const multiplicationSign = '\u00D7'; // ×
+  static const emDash = '\u2014'; // —
+  static const bullet = '\u2022'; // •
+  static const ratio = '\u2236'; // ∶
+  static const whiteMediumStar = '\u2B50'; // ⭐
+}

lib/services/media/embedded_data_service.dart

@@ -1,6 +1,6 @@
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/services/common/services.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:flutter/services.dart';
 
 abstract class EmbeddedDataService {
@@ -42,7 +42,7 @@ class PlatformEmbeddedDataService implements EmbeddedDataService {
         'mimeType': entry.mimeType,
         'uri': entry.uri,
         'sizeBytes': entry.sizeBytes,
-        'displayName': ['${entry.bestTitle}', dataUri].join(Constants.separator),
+        'displayName': ['${entry.bestTitle}', dataUri].join(AText.separator),
         'dataUri': dataUri,
       });
       if (result != null) return result as Map;
@@ -59,7 +59,7 @@ class PlatformEmbeddedDataService implements EmbeddedDataService {
         'mimeType': entry.mimeType,
         'uri': entry.uri,
         'sizeBytes': entry.sizeBytes,
-        'displayName': ['${entry.bestTitle}', 'Image'].join(Constants.separator),
+        'displayName': ['${entry.bestTitle}', 'Image'].join(AText.separator),
       });
       if (result != null) return result as Map;
     } on PlatformException catch (e, stack) {
@@ -75,7 +75,7 @@ class PlatformEmbeddedDataService implements EmbeddedDataService {
         'mimeType': entry.mimeType,
         'uri': entry.uri,
         'sizeBytes': entry.sizeBytes,
-        'displayName': ['${entry.bestTitle}', 'Video'].join(Constants.separator),
+        'displayName': ['${entry.bestTitle}', 'Video'].join(AText.separator),
       });
       if (result != null) return result as Map;
     } on PlatformException catch (e, stack) {
@@ -89,7 +89,7 @@ class PlatformEmbeddedDataService implements EmbeddedDataService {
     try {
       final result = await _platform.invokeMethod('extractVideoEmbeddedPicture', <String, dynamic>{
         'uri': entry.uri,
-        'displayName': ['${entry.bestTitle}', 'Cover'].join(Constants.separator),
+        'displayName': ['${entry.bestTitle}', 'Cover'].join(AText.separator),
       });
       if (result != null) return result as Map;
     } on PlatformException catch (e, stack) {
@@ -105,7 +105,7 @@ class PlatformEmbeddedDataService implements EmbeddedDataService {
         'mimeType': entry.mimeType,
         'uri': entry.uri,
         'sizeBytes': entry.sizeBytes,
-        'displayName': ['${entry.bestTitle}', '$props'].join(Constants.separator),
+        'displayName': ['${entry.bestTitle}', '$props'].join(AText.separator),
         'propPath': props,
         'propMimeType': propMimeType,
       });

lib/theme/colors.dart

@@ -33,6 +33,10 @@ class AvesColorsProvider extends StatelessWidget {
 }
 
 abstract class AvesColorsData {
+  static const defaultAccent = Colors.indigoAccent;
+  static const _neutralOnDark = Colors.white;
+  static const _neutralOnLight = Color(0xAA000000);
+
   Color get neutral;
 
   Color fromHue(double hue);
@@ -71,9 +75,6 @@ abstract class AvesColorsData {
 
   void clearAppColor(String album) => _appColors.remove(album);
 
-  static const Color _neutralOnDark = Colors.white;
-  static const Color _neutralOnLight = Color(0xAA000000);
-
   // mime
   Color get image => fromHue(243);
 

lib/theme/format.dart

@@ -1,4 +1,4 @@
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:intl/intl.dart';
 
 String formatDay(DateTime date, String locale) => DateFormat.yMMMd(locale).format(date);
@@ -8,7 +8,7 @@ String formatTime(DateTime date, String locale, bool use24hour) => (use24hour ?
 String formatDateTime(DateTime date, String locale, bool use24hour) => [
       formatDay(date, locale),
       formatTime(date, locale, use24hour),
-    ].join(Constants.separator);
+    ].join(AText.separator);
 
 String formatFriendlyDuration(Duration d) {
   final seconds = (d.inSeconds.remainder(Duration.secondsPerMinute)).toString().padLeft(2, '0');

lib/theme/styles.dart

@@ -0,0 +1,22 @@
+import 'dart:ui';
+
+import 'package:flutter/widgets.dart';
+
+class AStyles {
+  // as of Flutter v2.8.0, overflowing `Text` miscalculates height and some text (e.g. 'Å') is clipped
+  // so we give it a `strutStyle` with a slightly larger height
+  static const overflowStrut = StrutStyle(height: 1.3);
+
+  static const knownTitleText = TextStyle(
+    fontSize: 20,
+    fontWeight: FontWeight.w300,
+    fontFeatures: [FontFeature.enable('smcp')],
+  );
+
+  static TextStyle unknownTitleText = knownTitleText;
+
+  static void updateStylesForLocale(Locale locale) {
+    final smcp = locale.languageCode != 'el';
+    unknownTitleText = smcp ? knownTitleText : knownTitleText.copyWith(fontFeatures: []);
+  }
+}

lib/theme/text.dart

@@ -0,0 +1,7 @@
+import 'package:aves/ref/unicode.dart';
+
+class AText {
+  static const separator = ' ${Unicode.bullet} ';
+  static const resolutionSeparator = ' ${Unicode.multiplicationSign} ';
+  static const valueNotAvailable = Unicode.emDash;
+}

lib/theme/themes.dart

@@ -7,8 +7,6 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 
 class Themes {
-  static const defaultAccent = Colors.indigoAccent;
-
   static const _tooltipTheme = TooltipThemeData(
     verticalOffset: 32,
   );

lib/utils/colors.dart

@@ -0,0 +1,8 @@
+import 'dart:ui';
+
+class ColorUtils {
+  // `Color(0x00FFFFFF)` is different from `Color(0x00000000)` (or `Colors.transparent`)
+  // when used in gradients or lerping to it
+  static const transparentWhite = Color(0x00FFFFFF);
+  static const transparentBlack = Color(0x00000000);
+}

lib/utils/constants.dart

@@ -1,7 +1,4 @@
-import 'dart:ui';
-
 import 'package:flutter/material.dart';
-import 'package:latlong2/latlong.dart';
 import 'package:permission_handler/permission_handler.dart';
 
 class Constants {
@@ -12,32 +9,8 @@ class Constants {
     Permission.videos,
   ];
 
-  static const separator = ' • ';
-
-  // `Color(0x00FFFFFF)` is different from `Color(0x00000000)` (or `Colors.transparent`)
-  // when used in gradients or lerping to it
-  static const transparentWhite = Color(0x00FFFFFF);
-  static const transparentBlack = Colors.transparent;
-
-  // as of Flutter v2.8.0, overflowing `Text` miscalculates height and some text (e.g. 'Å') is clipped
-  // so we give it a `strutStyle` with a slightly larger height
-  static const overflowStrutStyle = StrutStyle(height: 1.3);
-
   static const double colorPickerRadius = 16;
 
-  static const knownTitleTextStyle = TextStyle(
-    fontSize: 20,
-    fontWeight: FontWeight.w300,
-    fontFeatures: [FontFeature.enable('smcp')],
-  );
-
-  static TextStyle unknownTitleTextStyle = knownTitleTextStyle;
-
-  static void updateStylesForLocale(Locale locale) {
-    final smcp = locale.languageCode != 'el';
-    unknownTitleTextStyle = smcp ? knownTitleTextStyle : knownTitleTextStyle.copyWith(fontFeatures: []);
-  }
-
   static const embossShadows = [
     Shadow(
       color: Colors.black,
@@ -50,30 +23,5 @@ class Constants {
     Color(0xffeaecc6),
   ];
 
-  // Bidi fun, cf https://www.unicode.org/reports/tr9/
-  // First Strong Isolate
-  static const fsi = '\u2068';
-
-  // Pop Directional Isolate
-  static const pdi = '\u2069';
-
-  static const zwsp = '\u200B';
-
-  static const overlayUnknown = '—'; // em dash
-
-  static final pointNemo = LatLng(-48.876667, -123.393333);
-
-  static final wonders = [
-    LatLng(29.979167, 31.134167),
-    LatLng(36.451000, 28.223615),
-    LatLng(32.5355, 44.4275),
-    LatLng(31.213889, 29.885556),
-    LatLng(37.0379, 27.4241),
-    LatLng(37.637861, 21.63),
-    LatLng(37.949722, 27.363889),
-  ];
-
   static const int infoGroupMaxValueLength = 140;
-
-  static const String avesGithub = 'https://github.com/deckerst/aves';
 }

lib/widgets/about/app_ref.dart

@@ -1,7 +1,6 @@
 import 'dart:ui';
 
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/about/policy_page.dart';
 import 'package:aves/widgets/common/basic/link_chip.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -10,6 +9,8 @@ import 'package:flutter/material.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 
 class AppReference extends StatefulWidget {
+  static const avesGithub = 'https://github.com/deckerst/aves';
+
   const AppReference({super.key});
 
   @override
@@ -79,7 +80,7 @@ class _AppReferenceState extends State<AppReference> {
             size: 24,
           ),
           text: 'GitHub',
-          urlString: Constants.avesGithub,
+          urlString: AppReference.avesGithub,
         ),
         LinkChip(
           leading: const Icon(
@@ -87,7 +88,7 @@ class _AppReferenceState extends State<AppReference> {
             size: 22,
           ),
           text: l10n.aboutLinkLicense,
-          urlString: '${Constants.avesGithub}/blob/main/LICENSE',
+          urlString: '${AppReference.avesGithub}/blob/main/LICENSE',
         ),
         LinkChip(
           leading: const Icon(

lib/widgets/about/bug_report.dart

@@ -10,7 +10,8 @@ import 'package:aves/ref/mime_types.dart';
 import 'package:aves/services/common/services.dart';
 import 'package:aves/theme/colors.dart';
 import 'package:aves/theme/durations.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/widgets/about/app_ref.dart';
 import 'package:aves/widgets/aves_app.dart';
 import 'package:aves/widgets/common/action_mixins/feedback.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -34,7 +35,7 @@ class _BugReportState extends State<BugReport> with FeedbackMixin {
   late Future<String> _infoLoader;
   bool _showInstructions = false;
 
-  static const bugReportUrl = '${Constants.avesGithub}/issues/new?labels=type%3Abug&template=bug_report.md';
+  static const bugReportUrl = '${AppReference.avesGithub}/issues/new?labels=type%3Abug&template=bug_report.md';
 
   @override
   void initState() {
@@ -60,7 +61,7 @@ class _BugReportState extends State<BugReport> with FeedbackMixin {
             child: Container(
               padding: const EdgeInsets.symmetric(horizontal: 16),
               alignment: AlignmentDirectional.centerStart,
-              child: Text(l10n.aboutBugSectionTitle, style: Constants.knownTitleTextStyle),
+              child: Text(l10n.aboutBugSectionTitle, style: AStyles.knownTitleText),
             ),
           ),
           body: Padding(

lib/widgets/about/licenses.dart

@@ -2,7 +2,7 @@ import 'package:aves/app_flavor.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/ref/brand_colors.dart';
 import 'package:aves/theme/colors.dart';
-import 'package:aves/utils/dependencies.dart';
+import 'package:aves/model/dependencies.dart';
 import 'package:aves/widgets/about/title.dart';
 import 'package:aves/widgets/about/tv_license_page.dart';
 import 'package:aves/widgets/common/basic/link_chip.dart';

lib/widgets/about/title.dart

@@ -1,5 +1,5 @@
 import 'package:aves/model/settings/settings.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:flutter/material.dart';
 
 class AboutSectionTitle extends StatelessWidget {
@@ -15,7 +15,7 @@ class AboutSectionTitle extends StatelessWidget {
     Widget child = Container(
       alignment: AlignmentDirectional.centerStart,
       constraints: const BoxConstraints(minHeight: kMinInteractiveDimension),
-      child: Text(text, style: Constants.knownTitleTextStyle),
+      child: Text(text, style: AStyles.knownTitleText),
     );
 
     if (settings.useTvLayout) {

lib/widgets/about/translators.dart

@@ -1,6 +1,6 @@
 import 'dart:math';
 
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/about/title.dart';
 import 'package:aves/widgets/common/basic/text/change_highlight.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -154,7 +154,7 @@ class _RandomTextSpanHighlighterState extends State<_RandomTextSpanHighlighter>
       TextSpan(
         children: [
           ...widget.spans.expandIndexed((i, v) => [
-                if (i != 0) const TextSpan(text: Constants.separator),
+                if (i != 0) const TextSpan(text: AText.separator),
                 TextSpan(text: v, style: i == _highlightedIndex ? _animatedStyle.value : _baseStyle),
               ])
         ],

lib/widgets/aves_app.dart

@@ -22,9 +22,9 @@ import 'package:aves/services/common/services.dart';
 import 'package:aves/theme/colors.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/theme/themes.dart';
 import 'package:aves/utils/android_file_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/utils/debouncer.dart';
 import 'package:aves/widgets/collection/collection_grid.dart';
 import 'package:aves/widgets/collection/collection_page.dart';
@@ -224,12 +224,12 @@ class _AvesAppState extends State<AvesApp> with WidgetsBindingObserver {
                 final themeBrightness = s.item2;
                 final enableDynamicColor = s.item3;
 
-                Constants.updateStylesForLocale(settings.appliedLocale);
+                AStyles.updateStylesForLocale(settings.appliedLocale);
 
                 return FutureBuilder<CorePalette?>(
                   future: _dynamicColorPaletteLoader,
                   builder: (context, snapshot) {
-                    const defaultAccent = Themes.defaultAccent;
+                    const defaultAccent = AvesColorsData.defaultAccent;
                     Color lightAccent = defaultAccent, darkAccent = defaultAccent;
                     if (enableDynamicColor) {
                       // `DynamicColorBuilder` from package `dynamic_color` provides light/dark

lib/widgets/collection/grid/list_details.dart

@@ -4,8 +4,9 @@ import 'package:aves/model/settings/enums/coordinate_format.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/format.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/collection_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/utils/file_utils.dart';
 import 'package:aves/widgets/collection/grid/list_details_theme.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -59,7 +60,7 @@ class EntryListDetails extends StatelessWidget {
         children: spans,
       ),
       style: style,
-      strutStyle: Constants.overflowStrutStyle,
+      strutStyle: AStyles.overflowStrut,
       softWrap: false,
       overflow: TextOverflow.fade,
     );
@@ -79,10 +80,10 @@ class EntryListDetails extends StatelessWidget {
     final locale = context.l10n.localeName;
     final use24hour = context.select<MediaQueryData, bool>((v) => v.alwaysUse24HourFormat);
     final date = entry.bestDate;
-    final dateText = date != null ? formatDateTime(date, locale, use24hour) : Constants.overlayUnknown;
+    final dateText = date != null ? formatDateTime(date, locale, use24hour) : AText.valueNotAvailable;
 
     final size = entry.burstEntries?.map((v) => v.sizeBytes).sum ?? entry.sizeBytes;
-    final sizeText = size != null ? formatFileSize(locale, size) : Constants.overlayUnknown;
+    final sizeText = size != null ? formatFileSize(locale, size) : AText.valueNotAvailable;
 
     return _buildRow(
       [

lib/widgets/collection/grid/list_details_theme.dart

@@ -1,5 +1,5 @@
 import 'package:aves/theme/format.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
@@ -43,7 +43,7 @@ class EntryListDetailsTheme extends StatelessWidget {
           TextSpan(text: formatDateTime(DateTime.now(), locale, use24hour), style: captionStyle),
           textDirection: TextDirection.ltr,
           textScaleFactor: textScaleFactor,
-          strutStyle: Constants.overflowStrutStyle,
+          strutStyle: AStyles.overflowStrut,
         )..layout(const BoxConstraints(), parentUsesSize: true))
             .getMaxIntrinsicHeight(double.infinity);
 

lib/widgets/common/expandable_filter_row.dart

@@ -2,7 +2,7 @@ import 'package:aves/model/filters/filters.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/identity/aves_filter_chip.dart';
 import 'package:flutter/material.dart';
 
@@ -34,7 +34,7 @@ class TitledExpandableFilterRow extends StatelessWidget {
 
     Widget header = Text(
       title,
-      style: Constants.knownTitleTextStyle,
+      style: AStyles.knownTitleText,
     );
     void toggle() => expandedNotifier.value = isExpanded ? null : title;
     if (settings.useTvLayout) {

lib/widgets/common/grid/header.dart

@@ -3,7 +3,7 @@ import 'package:aves/model/settings/settings.dart';
 import 'package:aves/model/source/section_keys.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/grid/sections/list_layout.dart';
 import 'package:flutter/material.dart';
@@ -85,7 +85,7 @@ class SectionHeader<T> extends StatelessWidget {
               ),
               TextSpan(
                 text: title,
-                style: Constants.unknownTitleTextStyle,
+                style: AStyles.unknownTitleText,
               ),
               if (trailing != null)
                 WidgetSpan(
@@ -141,7 +141,7 @@ class SectionHeader<T> extends StatelessWidget {
           if (hasTrailing) TextSpan(text: '\u200A' * 17),
           TextSpan(
             text: title,
-            style: Constants.unknownTitleTextStyle,
+            style: AStyles.unknownTitleText,
           ),
         ],
       ),

lib/widgets/common/grid/sections/fixed/scale_overlay.dart

@@ -1,6 +1,6 @@
 import 'package:aves/model/source/enums/enums.dart';
 import 'package:aves/theme/durations.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/utils/colors.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/providers/media_query_data_provider.dart';
 import 'package:flutter/material.dart';
@@ -123,12 +123,12 @@ class _OverlayBackgroundState extends State<_OverlayBackground> {
             gradient: RadialGradient(
               colors: isDark
                   ? const [
-                      Constants.transparentBlack,
+                      ColorUtils.transparentBlack,
-                      Constants.transparentBlack,
+                      ColorUtils.transparentBlack,
                     ]
                   : const [
-                      Constants.transparentWhite,
+                      ColorUtils.transparentWhite,
-                      Constants.transparentWhite,
+                      ColorUtils.transparentWhite,
                     ],
             ),
           );

lib/widgets/common/grid/sections/mosaic/scale_overlay.dart

@@ -1,5 +1,5 @@
 import 'package:aves/theme/durations.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/utils/colors.dart';
 import 'package:aves/widgets/common/grid/sections/mosaic/scale_grid.dart';
 import 'package:aves/widgets/common/providers/media_query_data_provider.dart';
 import 'package:flutter/material.dart';
@@ -110,7 +110,7 @@ class _OverlayBackgroundState extends State<_OverlayBackground> {
             color: isDark ? Colors.black87 : const Color(0xDDFFFFFF),
           )
         : BoxDecoration(
-            color: isDark ? Constants.transparentBlack : Constants.transparentWhite,
+            color: isDark ? ColorUtils.transparentBlack : ColorUtils.transparentWhite,
           );
   }
 }

lib/widgets/common/map/geo_map.dart

@@ -9,10 +9,10 @@ import 'package:aves/model/entry/sort.dart';
 import 'package:aves/model/settings/enums/l10n.dart';
 import 'package:aves/model/settings/enums/map_style.dart';
 import 'package:aves/model/settings/settings.dart';
+import 'package:aves/ref/poi.dart';
 import 'package:aves/services/common/services.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/utils/math_utils.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/buttons/overlay_button.dart';
@@ -331,7 +331,7 @@ class _GeoMapState extends State<GeoMap> {
       // fallback to default center
       var center = settings.mapDefaultCenter;
       if (center == null) {
-        center = Constants.wonders[Random().nextInt(Constants.wonders.length)];
+        center = PointsOfInterest.wonders[Random().nextInt(PointsOfInterest.wonders.length)];
         WidgetsBinding.instance.addPostFrameCallback((_) => settings.mapDefaultCenter = center);
       }
       bounds = ZoomedBounds.fromPoints(

lib/widgets/dialogs/convert_entry_dialog.dart

@@ -1,11 +1,11 @@
 import 'package:aves/model/entry/entry.dart';
-import 'package:aves/model/entry/extensions/props.dart';
 import 'package:aves/model/metadata/enums/enums.dart';
 import 'package:aves/model/metadata/enums/length_unit.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/ref/mime_types.dart';
 import 'package:aves/services/media/media_edit_service.dart';
 import 'package:aves/theme/durations.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/theme/themes.dart';
 import 'package:aves/utils/mime_utils.dart';
 import 'package:aves/widgets/common/basic/text_dropdown_button.dart';
@@ -149,7 +149,7 @@ class _ConvertEntryDialogState extends State<ConvertEntryDialog> {
                 ),
               ),
               const SizedBox(width: 8),
-              const Text(ExtraAvesEntryProps.resolutionSeparator),
+              const Text(AText.resolutionSeparator),
               const SizedBox(width: 8),
               Expanded(
                 child: TextField(

lib/widgets/dialogs/entry_editors/edit_location_dialog.dart

@@ -6,10 +6,10 @@ import 'package:aves/model/metadata/enums/location_edit_action.dart';
 import 'package:aves/model/settings/enums/coordinate_format.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/model/source/collection_lens.dart';
+import 'package:aves/ref/poi.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
 import 'package:aves/theme/themes.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/basic/text_dropdown_button.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/fx/transitions.dart';
@@ -250,7 +250,7 @@ class _EditEntryLocationDialogState extends State<EditEntryLocationDialog> {
                   controller: _latitudeController,
                   decoration: InputDecoration(
                     labelText: l10n.editEntryLocationDialogLatitude,
-                    hintText: coordinateFormatter.format(Constants.pointNemo.latitude),
+                    hintText: coordinateFormatter.format(PointsOfInterest.pointNemo.latitude),
                   ),
                   onChanged: (_) => _validate(),
                 ),
@@ -258,7 +258,7 @@ class _EditEntryLocationDialogState extends State<EditEntryLocationDialog> {
                   controller: _longitudeController,
                   decoration: InputDecoration(
                     labelText: l10n.editEntryLocationDialogLongitude,
-                    hintText: coordinateFormatter.format(Constants.pointNemo.longitude),
+                    hintText: coordinateFormatter.format(PointsOfInterest.pointNemo.longitude),
                   ),
                   onChanged: (_) => _validate(),
                 ),

lib/widgets/dialogs/entry_editors/rename_entry_dialog.dart

@@ -2,9 +2,9 @@ import 'dart:io';
 
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/services/common/services.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/dialogs/aves_dialog.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 class RenameEntryDialog extends StatefulWidget {
@@ -43,7 +43,7 @@ class _RenameEntryDialogState extends State<RenameEntryDialog> {
   @override
   Widget build(BuildContext context) {
     final isRtl = context.isRtl;
-    final extensionSuffixText = '${Constants.fsi}${entry.extension}${Constants.pdi}';
+    final extensionSuffixText = '${Unicode.FSI}${entry.extension}${Unicode.PDI}';
     return AvesDialog(
       content: TextField(
         controller: _nameController,

lib/widgets/dialogs/entry_editors/rename_entry_set_page.dart

@@ -5,7 +5,7 @@ import 'package:aves/model/naming_pattern.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/collection/collection_grid.dart';
 import 'package:aves/widgets/common/basic/font_size_icon_theme.dart';
 import 'package:aves/widgets/common/basic/popup/menu_row.dart';
@@ -117,7 +117,7 @@ class _RenameEntrySetPageState extends State<RenameEntrySetPage> {
               padding: const EdgeInsets.all(16),
               child: Text(
                 l10n.renameEntrySetPagePreviewSectionTitle,
-                style: Constants.knownTitleTextStyle,
+                style: AStyles.knownTitleText,
               ),
             ),
             Expanded(

lib/widgets/dialogs/pick_dialogs/location_pick_page.dart

@@ -8,7 +8,8 @@ import 'package:aves/services/common/services.dart';
 import 'package:aves/services/geocoding_service.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/debouncer.dart';
 import 'package:aves/widgets/common/basic/scaffold.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -267,8 +268,8 @@ class _AddressRowState extends State<_AddressRow> {
               valueListenable: _addressLineNotifier,
               builder: (context, addressLine, child) {
                 return Text(
-                  addressLine ?? Constants.overlayUnknown,
+                  addressLine ?? AText.valueNotAvailable,
-                  strutStyle: Constants.overflowStrutStyle,
+                  strutStyle: AStyles.overflowStrut,
                   softWrap: false,
                   overflow: TextOverflow.fade,
                   maxLines: 1,
@@ -317,8 +318,8 @@ class _CoordinateRow extends StatelessWidget {
         const SizedBox(width: _LocationInfo.iconPadding),
         Expanded(
           child: Text(
-            location != null ? settings.coordinateFormat.format(context.l10n, location!) : Constants.overlayUnknown,
+            location != null ? settings.coordinateFormat.format(context.l10n, location!) : AText.valueNotAvailable,
-            strutStyle: Constants.overflowStrutStyle,
+            strutStyle: AStyles.overflowStrut,
             softWrap: false,
             overflow: TextOverflow.fade,
             maxLines: 1,

lib/widgets/dialogs/video_stream_selection_dialog.dart

@@ -1,6 +1,6 @@
-import 'package:aves/model/entry/extensions/props.dart';
 import 'package:aves/ref/languages.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/theme/themes.dart';
 import 'package:aves/widgets/common/basic/text_dropdown_button.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
@@ -117,7 +117,7 @@ class _VideoStreamSelectionDialogState extends State<VideoStreamSelectionDialog>
       final w = stream.width;
       final h = stream.height;
       if (w != null && h != null) {
-        return '$common • $w${ExtraAvesEntryProps.resolutionSeparator}$h';
+        return '$common • $w${AText.resolutionSeparator}$h';
       }
     }
     return common;

lib/widgets/filter_grids/common/covered_filter_chip.dart

@@ -12,8 +12,8 @@ import 'package:aves/model/source/tag.dart';
 import 'package:aves/model/vaults/vaults.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/android_file_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/aves_filter_chip.dart';
 import 'package:aves/widgets/common/thumbnail/image.dart';
@@ -214,7 +214,7 @@ class CoveredFilterChip<T extends CollectionFilter> extends StatelessWidget {
             ),
           ),
         Text(
-          locked ? Constants.overlayUnknown : numberFormat.format(source.count(filter)),
+          locked ? AText.valueNotAvailable : numberFormat.format(source.count(filter)),
           style: TextStyle(
             color: _detailColor(context),
             fontSize: fontSize,

lib/widgets/filter_grids/common/list_details.dart

@@ -4,8 +4,9 @@ import 'package:aves/model/filters/filters.dart';
 import 'package:aves/model/source/collection_source.dart';
 import 'package:aves/theme/format.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/android_file_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/utils/file_utils.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/fx/borders.dart';
@@ -87,7 +88,7 @@ class FilterListDetails<T extends CollectionFilter> extends StatelessWidget {
     final locale = context.l10n.localeName;
     final use24hour = context.select<MediaQueryData, bool>((v) => v.alwaysUse24HourFormat);
     final date = entry?.bestDate;
-    final dateText = date != null ? formatDateTime(date, locale, use24hour) : Constants.overlayUnknown;
+    final dateText = date != null ? formatDateTime(date, locale, use24hour) : AText.valueNotAvailable;
 
     Widget leading = const Icon(AIcons.date);
     if (hasTitleLeading) {
@@ -106,7 +107,7 @@ class FilterListDetails<T extends CollectionFilter> extends StatelessWidget {
             child: Text(
               dateText,
               style: detailsTheme.captionStyle,
-              strutStyle: Constants.overflowStrutStyle,
+              strutStyle: AStyles.overflowStrut,
               softWrap: false,
               overflow: TextOverflow.fade,
             ),
@@ -157,7 +158,7 @@ class FilterListDetails<T extends CollectionFilter> extends StatelessWidget {
           Text(
             '${l10n.itemCount(source.count(filter))} • ${formatFileSize(locale, source.size(filter))}',
             style: detailsTheme.captionStyle,
-            strutStyle: Constants.overflowStrutStyle,
+            strutStyle: AStyles.overflowStrut,
             softWrap: false,
             overflow: TextOverflow.fade,
           ),

lib/widgets/filter_grids/common/list_details_theme.dart

@@ -1,7 +1,7 @@
 import 'dart:math';
 
 import 'package:aves/theme/format.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/aves_filter_chip.dart';
 import 'package:flutter/material.dart';
@@ -49,7 +49,7 @@ class FilterListDetailsTheme extends StatelessWidget {
           TextSpan(text: formatDateTime(DateTime.now(), locale, use24hour), style: captionStyle),
           textDirection: TextDirection.ltr,
           textScaleFactor: textScaleFactor,
-          strutStyle: Constants.overflowStrutStyle,
+          strutStyle: AStyles.overflowStrut,
         )..layout(const BoxConstraints(), parentUsesSize: true))
             .getMaxIntrinsicHeight(double.infinity);
 

lib/widgets/map/map_info_row.dart

@@ -6,7 +6,8 @@ import 'package:aves/services/common/services.dart';
 import 'package:aves/services/geocoding_service.dart';
 import 'package:aves/theme/format.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves_map/aves_map.dart';
 import 'package:flutter/material.dart';
@@ -118,13 +119,13 @@ class _AddressRowState extends State<_AddressRow> {
               builder: (context, addressLine, child) {
                 final location = addressLine ??
                     (entry == null
-                        ? Constants.overlayUnknown
+                        ? AText.valueNotAvailable
                         : entry.hasAddress
                             ? entry.shortAddress
                             : settings.coordinateFormat.format(context.l10n, entry.latLng!));
                 return Text(
                   location,
-                  strutStyle: Constants.overflowStrutStyle,
+                  strutStyle: AStyles.overflowStrut,
                   softWrap: false,
                   overflow: TextOverflow.fade,
                   maxLines: 1,
@@ -170,7 +171,7 @@ class _DateRow extends StatelessWidget {
     final use24hour = context.select<MediaQueryData, bool>((v) => v.alwaysUse24HourFormat);
 
     final date = entry?.bestDate;
-    final dateText = date != null ? formatDateTime(date, locale, use24hour) : Constants.overlayUnknown;
+    final dateText = date != null ? formatDateTime(date, locale, use24hour) : AText.valueNotAvailable;
     return Row(
       children: [
         const SizedBox(width: MapInfoRow.iconPadding),
@@ -179,7 +180,7 @@ class _DateRow extends StatelessWidget {
         Expanded(
           child: Text(
             dateText,
-            strutStyle: Constants.overflowStrutStyle,
+            strutStyle: AStyles.overflowStrut,
             softWrap: false,
             overflow: TextOverflow.fade,
             maxLines: 1,

lib/widgets/settings/common/quick_actions/editor_page.dart

@@ -2,9 +2,8 @@ import 'dart:async';
 
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/basic/font_size_icon_theme.dart';
-import 'package:aves_utils/aves_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/basic/scaffold.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/buttons/captioned_button.dart';
@@ -13,6 +12,7 @@ import 'package:aves/widgets/settings/common/quick_actions/action_panel.dart';
 import 'package:aves/widgets/settings/common/quick_actions/available_actions.dart';
 import 'package:aves/widgets/settings/common/quick_actions/placeholder.dart';
 import 'package:aves/widgets/settings/common/quick_actions/quick_actions.dart';
+import 'package:aves_utils/aves_utils.dart';
 import 'package:collection/collection.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
@@ -163,7 +163,7 @@ class _QuickActionEditorBodyState<T extends Object> extends State<QuickActionEdi
             padding: const EdgeInsets.only(left: 16, top: 16, right: 16),
             child: Text(
               context.l10n.settingsViewerQuickActionEditorDisplayedButtonsSectionTitle,
-              style: Constants.knownTitleTextStyle,
+              style: AStyles.knownTitleText,
             ),
           ),
           ValueListenableBuilder<bool>(
@@ -240,7 +240,7 @@ class _QuickActionEditorBodyState<T extends Object> extends State<QuickActionEdi
             padding: const EdgeInsets.symmetric(horizontal: 16),
             child: Text(
               context.l10n.settingsViewerQuickActionEditorAvailableButtonsSectionTitle,
-              style: Constants.knownTitleTextStyle,
+              style: AStyles.knownTitleText,
             ),
           ),
           ValueListenableBuilder<bool>(

lib/widgets/settings/common/tiles.dart

@@ -1,6 +1,6 @@
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/durations.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/utils/time_utils.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/aves_caption.dart';
@@ -179,7 +179,7 @@ class SettingsMultiSelectionListTile<T> extends StatelessWidget {
         }
         return ListTile(
           title: titleWidget,
-          subtitle: AvesCaption(current.isEmpty ? noneSubtitle : current.map((v) => getName(context, v)).join(Constants.separator)),
+          subtitle: AvesCaption(current.isEmpty ? noneSubtitle : current.map((v) => getName(context, v)).join(AText.separator)),
           onTap: () => showSelectionDialog<List<T>>(
             context: context,
             builder: (context) => AvesMultiSelectionDialog<T>(

lib/widgets/settings/language/language.dart

@@ -4,9 +4,9 @@ import 'package:aves/model/settings/enums/coordinate_format.dart';
 import 'package:aves/model/settings/enums/enums.dart';
 import 'package:aves/model/settings/enums/l10n.dart';
 import 'package:aves/model/settings/settings.dart';
+import 'package:aves/ref/poi.dart';
 import 'package:aves/theme/colors.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/settings/common/tile_leading.dart';
 import 'package:aves/widgets/settings/common/tiles.dart';
@@ -56,7 +56,7 @@ class SettingsTileLanguageCoordinateFormat extends SettingsTile {
         onSelection: (v) => settings.coordinateFormat = v,
         tileTitle: title(context),
         dialogTitle: context.l10n.settingsCoordinateFormatDialogTitle,
-        optionSubtitleBuilder: (value) => value.format(context.l10n, Constants.pointNemo),
+        optionSubtitleBuilder: (value) => value.format(context.l10n, PointsOfInterest.pointNemo),
       );
 }
 

lib/widgets/settings/privacy/file_picker/file_picker_page.dart

@@ -5,7 +5,6 @@ import 'package:aves/services/common/services.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
 import 'package:aves/utils/android_file_utils.dart';
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/basic/font_size_icon_theme.dart';
 import 'package:aves/widgets/common/basic/popup/menu_row.dart';
 import 'package:aves/widgets/common/basic/scaffold.dart';
@@ -183,7 +182,7 @@ class _FilePickerPageState extends State<FilePickerPage> {
   Widget _buildContentLine(BuildContext context, FileSystemEntity content) {
     return ListTile(
       leading: const Icon(AIcons.folder),
-      title: Text('${Constants.fsi}${pContext.split(content.path).last}${Constants.pdi}'),
+      title: Text('${Unicode.FSI}${pContext.split(content.path).last}${Unicode.PDI}'),
       onTap: () {
         _goTo(content.path);
         setState(() {});

lib/widgets/stats/stats_page.dart

@@ -12,7 +12,7 @@ import 'package:aves/model/source/collection_lens.dart';
 import 'package:aves/model/source/collection_source.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/collection/collection_page.dart';
 import 'package:aves/widgets/common/action_mixins/feedback.dart';
 import 'package:aves/widgets/common/action_mixins/vault_aware.dart';
@@ -285,7 +285,7 @@ class _StatsPageState extends State<StatsPage> with FeedbackMixin, VaultAwareMix
         : null;
     Widget header = Text(
       title,
-      style: Constants.knownTitleTextStyle,
+      style: AStyles.knownTitleText,
     );
     if (settings.useTvLayout) {
       header = Container(

lib/widgets/viewer/info/common.dart

@@ -1,7 +1,7 @@
 import 'dart:math';
 
-import 'package:aves/utils/constants.dart';
 import 'package:aves/widgets/common/identity/aves_filter_chip.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/rendering.dart';
@@ -75,7 +75,7 @@ class InfoRowGroup extends StatefulWidget {
       final linkColor = Theme.of(context).colorScheme.primary;
       final style = InfoRowGroup.valueStyle.copyWith(color: linkColor, decoration: TextDecoration.underline);
 
-      return [TextSpan(text: '${Constants.fsi}$value${Constants.pdi}', style: style, recognizer: recognizer)];
+      return [TextSpan(text: '${Unicode.FSI}$value${Unicode.PDI}', style: style, recognizer: recognizer)];
     };
   }
 }
@@ -164,7 +164,7 @@ class _InfoRowGroupState extends State<InfoRowGroup> {
   // so that layout of the spans follows the directionality of the locale
   // (e.g. keys on the right for RTL locale, whatever the key intrinsic directionality)
   // and each span respects the directionality of its inner text only
-  String _buildTextValue(String value) => '${Constants.fsi}$value${Constants.pdi}';
+  String _buildTextValue(String value) => '${Unicode.FSI}$value${Unicode.PDI}';
 }
 
 typedef InfoValueSpanBuilder = List<InlineSpan> Function(BuildContext context, String key, String value);

lib/widgets/viewer/overlay/details/date.dart

@@ -2,7 +2,8 @@ import 'package:aves/model/entry/entry.dart';
 import 'package:aves/model/entry/extensions/props.dart';
 import 'package:aves/theme/format.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/viewer/multipage/controller.dart';
 import 'package:aves/widgets/viewer/overlay/details/details.dart';
@@ -26,7 +27,7 @@ class OverlayDateRow extends StatelessWidget {
     final use24hour = context.select<MediaQueryData, bool>((v) => v.alwaysUse24HourFormat);
 
     final date = entry.bestDate;
-    final dateText = date != null ? formatDateTime(date, locale, use24hour) : Constants.overlayUnknown;
+    final dateText = date != null ? formatDateTime(date, locale, use24hour) : AText.valueNotAvailable;
     final resolutionText = entry.isSvg
         ? entry.aspectRatioText
         : entry.isSized
@@ -37,8 +38,8 @@ class OverlayDateRow extends StatelessWidget {
       children: [
         DecoratedIcon(AIcons.date, size: ViewerDetailOverlayContent.iconSize, shadows: ViewerDetailOverlayContent.shadows(context)),
         const SizedBox(width: ViewerDetailOverlayContent.iconPadding),
-        Expanded(flex: 3, child: Text(dateText, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(flex: 3, child: Text(dateText, strutStyle: AStyles.overflowStrut)),
-        Expanded(flex: 2, child: Text(resolutionText, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(flex: 2, child: Text(resolutionText, strutStyle: AStyles.overflowStrut)),
       ],
     );
   }

lib/widgets/viewer/overlay/details/description.dart

@@ -1,5 +1,5 @@
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/viewer/overlay/details/details.dart';
 import 'package:decorated_icon/decorated_icon.dart';
 import 'package:flutter/material.dart';
@@ -31,7 +31,7 @@ class OverlayDescriptionRow extends StatelessWidget {
           TextSpan(text: description),
         ],
       ),
-      strutStyle: Constants.overflowStrutStyle,
+      strutStyle: AStyles.overflowStrut,
     );
   }
 }

lib/widgets/viewer/overlay/details/location.dart

@@ -3,7 +3,7 @@ import 'package:aves/model/entry/extensions/location.dart';
 import 'package:aves/model/settings/enums/coordinate_format.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/viewer/overlay/details/details.dart';
 import 'package:decorated_icon/decorated_icon.dart';
@@ -34,7 +34,7 @@ class OverlayLocationRow extends AnimatedWidget {
       children: [
         DecoratedIcon(AIcons.location, size: ViewerDetailOverlayContent.iconSize, shadows: ViewerDetailOverlayContent.shadows(context)),
         const SizedBox(width: ViewerDetailOverlayContent.iconPadding),
-        Expanded(child: Text(location, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(child: Text(location, strutStyle: AStyles.overflowStrut)),
       ],
     );
   }

lib/widgets/viewer/overlay/details/position_title.dart

@@ -1,7 +1,9 @@
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/model/multipage.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/viewer/multipage/controller.dart';
+import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 
 class OverlayPositionTitleRow extends StatelessWidget {
@@ -26,9 +28,9 @@ class OverlayPositionTitleRow extends StatelessWidget {
         [
           if (collectionPosition != null) collectionPosition,
           if (pagePosition != null) pagePosition,
-          if (title != null) '${Constants.fsi}$title${Constants.pdi}',
+          if (title != null) '${Unicode.FSI}$title${Unicode.PDI}',
-        ].join(Constants.separator),
+        ].join(AText.separator),
-        strutStyle: Constants.overflowStrutStyle);
+        strutStyle: AStyles.overflowStrut);
 
     if (multiPageController == null) return toText();
 

lib/widgets/viewer/overlay/details/rating_tags.dart

@@ -1,6 +1,7 @@
 import 'package:aves/model/entry/entry.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/viewer/overlay/details/details.dart';
 import 'package:collection/collection.dart';
@@ -40,7 +41,7 @@ class OverlayRatingTagsRow extends AnimatedWidget {
         children: [
           TextSpan(text: ratingString),
           if (hasTags) ...[
-            if (ratingString.isNotEmpty) const TextSpan(text: Constants.separator),
+            if (ratingString.isNotEmpty) const TextSpan(text: AText.separator),
             WidgetSpan(
               alignment: PlaceholderAlignment.middle,
               child: Padding(
@@ -52,11 +53,11 @@ class OverlayRatingTagsRow extends AnimatedWidget {
                 ),
               ),
             ),
-            TextSpan(text: tags.join(Constants.separator)),
+            TextSpan(text: tags.join(AText.separator)),
           ]
         ],
       ),
-      strutStyle: Constants.overflowStrutStyle,
+      strutStyle: AStyles.overflowStrut,
     );
   }
 }

lib/widgets/viewer/overlay/details/shooting.dart

@@ -1,6 +1,7 @@
 import 'package:aves/model/metadata/overlay.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/styles.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/viewer/overlay/details/details.dart';
 import 'package:decorated_icon/decorated_icon.dart';
@@ -20,22 +21,22 @@ class OverlayShootingRow extends StatelessWidget {
     final locale = context.l10n.localeName;
 
     final aperture = details.aperture;
-    final apertureText = aperture != null ? 'ƒ/${NumberFormat('0.0', locale).format(aperture)}' : Constants.overlayUnknown;
+    final apertureText = aperture != null ? 'ƒ/${NumberFormat('0.0', locale).format(aperture)}' : AText.valueNotAvailable;
 
     final focalLength = details.focalLength;
-    final focalLengthText = focalLength != null ? context.l10n.focalLength(NumberFormat('0.#', locale).format(focalLength)) : Constants.overlayUnknown;
+    final focalLengthText = focalLength != null ? context.l10n.focalLength(NumberFormat('0.#', locale).format(focalLength)) : AText.valueNotAvailable;
 
     final iso = details.iso;
-    final isoText = iso != null ? 'ISO$iso' : Constants.overlayUnknown;
+    final isoText = iso != null ? 'ISO$iso' : AText.valueNotAvailable;
 
     return Row(
       children: [
         DecoratedIcon(AIcons.shooting, size: ViewerDetailOverlayContent.iconSize, shadows: ViewerDetailOverlayContent.shadows(context)),
         const SizedBox(width: ViewerDetailOverlayContent.iconPadding),
-        Expanded(child: Text(apertureText, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(child: Text(apertureText, strutStyle: AStyles.overflowStrut)),
-        Expanded(child: Text(details.exposureTime ?? Constants.overlayUnknown, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(child: Text(details.exposureTime ?? AText.valueNotAvailable, strutStyle: AStyles.overflowStrut)),
-        Expanded(child: Text(focalLengthText, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(child: Text(focalLengthText, strutStyle: AStyles.overflowStrut)),
-        Expanded(child: Text(isoText, strutStyle: Constants.overflowStrutStyle)),
+        Expanded(child: Text(isoText, strutStyle: AStyles.overflowStrut)),
       ],
     );
   }

lib/widgets/viewer/overlay/selection_button.dart

@@ -2,7 +2,7 @@ import 'package:aves/model/entry/entry.dart';
 import 'package:aves/model/selection.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/common/basic/text/animated_diff.dart';
 import 'package:aves/widgets/common/extensions/build_context.dart';
 import 'package:aves/widgets/common/identity/buttons/overlay_button.dart';
@@ -50,7 +50,7 @@ class SelectionButton extends StatelessWidget {
                       ),
                       const Padding(
                         padding: EdgeInsets.symmetric(horizontal: 8),
-                        child: Text(Constants.separator),
+                        child: Text(AText.separator),
                       ),
                       Selector<Selection<AvesEntry>, bool>(
                         selector: (context, selection) => selection.isSelected({mainEntry}),

lib/widgets/viewer/visual/video/subtitle/ass_parser.dart

@@ -1,3 +1,4 @@
+import 'package:aves/ref/unicode.dart';
 import 'package:aves/widgets/viewer/visual/video/subtitle/line.dart';
 import 'package:aves/widgets/viewer/visual/video/subtitle/span.dart';
 import 'package:aves/widgets/viewer/visual/video/subtitle/style.dart';
@@ -39,8 +40,6 @@ class AssParser {
   // e.g. m 937.5 472.67 b 937.5 472.67 937.25 501.25 960 501.5 960 501.5 937.5 500.33 937.5 529.83
   static final pathPattern = RegExp(r'([mnlbspc])([.\s\d]+)');
 
-  static const noBreakSpace = '\u00A0';
-
   // Parse text with ASS style overrides
   // cf https://aegi.vmoe.info/docs/3.0/ASS_Tags/
   // e.g. `And I'm like, "We can't {\i1}not{\i0} see it."`
@@ -389,7 +388,7 @@ class AssParser {
     );
   }
 
-  static String _replaceChars(String text) => text.replaceAll(r'\h', noBreakSpace).replaceAll(r'\N', '\n').trim();
+  static String _replaceChars(String text) => text.replaceAll(r'\h', Unicode.noBreakSpace).replaceAll(r'\N', '\n').trim();
 
   static int? _parseAlpha(String param) {
     final match = alphaPattern.firstMatch(param);

lib/widgets/welcome_page.dart

@@ -3,7 +3,7 @@ import 'package:aves/model/settings/defaults.dart';
 import 'package:aves/model/settings/settings.dart';
 import 'package:aves/theme/durations.dart';
 import 'package:aves/theme/icons.dart';
-import 'package:aves/utils/constants.dart';
+import 'package:aves/theme/text.dart';
 import 'package:aves/widgets/about/policy_page.dart';
 import 'package:aves/widgets/common/basic/link_chip.dart';
 import 'package:aves/widgets/common/basic/markdown_container.dart';
@@ -174,7 +174,7 @@ class _WelcomePageState extends State<WelcomePage> {
             value: settings.isInstalledAppAccessAllowed,
             onChanged: (v) => setState(() => settings.isInstalledAppAccessAllowed = v),
             title: Text(l10n.settingsAllowInstalledAppAccess),
-            subtitle: Text([l10n.welcomeOptional, l10n.settingsAllowInstalledAppAccessSubtitle].join(Constants.separator)),
+            subtitle: Text([l10n.welcomeOptional, l10n.settingsAllowInstalledAppAccessSubtitle].join(AText.separator)),
             contentPadding: contentPadding,
           ),
           if (canEnableErrorReporting)