🎨 Make all text delegates const

Author: AlexV525

example/lib/constants/picker_method.dart

@@ -86,6 +86,7 @@ class PickMethod {
       name: 'Pick from camera',
       description: 'Allow pick an asset through camera.',
       method: (BuildContext context, List<AssetEntity> assets) {
+        const AssetPickerTextDelegate textDelegate = AssetPickerTextDelegate();
         return AssetPicker.pickAssets(
           context,
           pickerConfig: AssetPickerConfig(
@@ -102,9 +103,9 @@ class PickMethod {
                 return null;
               }
               return Semantics(
-                label: AssetPickerTextDelegate().sActionUseCameraHint,
+                label: textDelegate.sActionUseCameraHint,
                 button: true,
-                onTapHint: AssetPickerTextDelegate().sActionUseCameraHint,
+                onTapHint: textDelegate.sActionUseCameraHint,
                 child: GestureDetector(
                   behavior: HitTestBehavior.opaque,
                   onTap: () async {
@@ -133,6 +134,7 @@ class PickMethod {
       description: 'Take a photo or video with the camera picker, '
           'select the result and stay in the entities list.',
       method: (BuildContext context, List<AssetEntity> assets) {
+        const AssetPickerTextDelegate textDelegate = AssetPickerTextDelegate();
         return AssetPicker.pickAssets(
           context,
           pickerConfig: AssetPickerConfig(
@@ -149,9 +151,9 @@ class PickMethod {
                 return null;
               }
               return Semantics(
-                label: AssetPickerTextDelegate().sActionUseCameraHint,
+                label: textDelegate.sActionUseCameraHint,
                 button: true,
-                onTapHint: AssetPickerTextDelegate().sActionUseCameraHint,
+                onTapHint: textDelegate.sActionUseCameraHint,
                 child: GestureDetector(
                   behavior: HitTestBehavior.opaque,
                   onTap: () async {
@@ -332,7 +334,7 @@ class PickMethod {
           pickerConfig: AssetPickerConfig(
             maxAssets: maxAssetsCount,
             selectedAssets: assets,
-            textDelegate: EnglishAssetPickerTextDelegate(),
+            textDelegate: const EnglishAssetPickerTextDelegate(),
           ),
         );
       },

lib/src/delegates/asset_picker_text_delegate.dart

@@ -8,7 +8,7 @@ import 'package:flutter/rendering.dart';
 import 'package:photo_manager/photo_manager.dart' show AssetType;
 
 /// All text delegates.
-final List<AssetPickerTextDelegate> assetPickerTextDelegates =
+const List<AssetPickerTextDelegate> assetPickerTextDelegates =
     <AssetPickerTextDelegate>[
   AssetPickerTextDelegate(),
   EnglishAssetPickerTextDelegate(),
@@ -23,20 +23,22 @@ final List<AssetPickerTextDelegate> assetPickerTextDelegates =
 /// Obtain the text delegate from the given locale.
 AssetPickerTextDelegate assetPickerTextDelegateFromLocale(Locale? locale) {
   if (locale == null) {
-    return AssetPickerTextDelegate();
+    return const AssetPickerTextDelegate();
   }
   final String languageCode = locale.languageCode.toLowerCase();
   for (final AssetPickerTextDelegate delegate in assetPickerTextDelegates) {
     if (delegate.languageCode == languageCode) {
       return delegate;
     }
   }
-  return AssetPickerTextDelegate();
+  return const AssetPickerTextDelegate();
 }
 
 /// Text delegate that controls text in widgets.
 /// 控制部件中的文字实现
 class AssetPickerTextDelegate {
+  const AssetPickerTextDelegate();
+
   String get languageCode => 'zh';
 
   /// Confirm string for the confirm button.
@@ -164,6 +166,8 @@ class AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with English.
 /// English Localization
 class EnglishAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const EnglishAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'en';
 
@@ -258,6 +262,8 @@ class EnglishAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with Hebrew.
 /// תרגום בשפה העברית
 class HebrewAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const HebrewAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'he';
 
@@ -350,7 +356,7 @@ class HebrewAssetPickerTextDelegate extends AssetPickerTextDelegate {
   @override
   AssetPickerTextDelegate get semanticsTextDelegate {
     if (Platform.isAndroid) {
-      return EnglishAssetPickerTextDelegate();
+      return const EnglishAssetPickerTextDelegate();
     }
     return this;
   }
@@ -359,6 +365,8 @@ class HebrewAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implementiert mit der deutschen Übersetzung.
 /// Deutsche Textimplementierung.
 class GermanAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const GermanAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'de';
 
@@ -451,6 +459,8 @@ class GermanAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with Russian.
 /// Локализация на русский язык.
 class RussianAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const RussianAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'ru';
 
@@ -546,6 +556,8 @@ class RussianAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with Japanese.
 /// 日本語の TextDelegate
 class JapaneseAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const JapaneseAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'ja';
 
@@ -640,6 +652,8 @@ class JapaneseAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with Arabic.
 /// الترجمة العربية
 class ArabicAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const ArabicAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'ar';
 
@@ -735,6 +749,8 @@ class ArabicAssetPickerTextDelegate extends AssetPickerTextDelegate {
 /// [AssetPickerTextDelegate] implements with French.
 /// Délégué texte français
 class FrenchAssetPickerTextDelegate extends AssetPickerTextDelegate {
+  const FrenchAssetPickerTextDelegate();
+
   @override
   String get languageCode => 'fr';
 

lib/src/internal/singleton.dart

@@ -13,7 +13,7 @@ class Singleton {
 
   static GlobalKey pickerKey = GlobalKey();
 
-  static AssetPickerTextDelegate textDelegate = AssetPickerTextDelegate();
+  static AssetPickerTextDelegate textDelegate = const AssetPickerTextDelegate();
   static SortPathDelegate<dynamic> sortPathDelegate = SortPathDelegate.common;
 
   /// The last scroll position where the picker scrolled.