lightweight variant (#1)

Reviewed-on: #1 Co-authored-by: Aleksandr Neychev <alexnejchev73@gmail.com>
2026-08-12 13:37:30 +00:00
parent a0d3098fe4
commit 55ac8e6556
147 changed files with 4055 additions and 2349 deletions
@@ -0,0 +1,58 @@
+using System.Globalization;
+using System.Resources;
+using CommunityToolkit.Mvvm.ComponentModel;
+
+namespace CursorLang.Core.Services;
+
+/// <summary>
+/// Takes the strings from the resources and, when the language changes, asks WPF to
+/// re-read every binding.
+/// </summary>
+/// <remarks>
+/// Both processes use it: the settings window for its whole interface, the agent for
+/// the three captions of the tray menu. The theme no longer reaches that menu — Windows
+/// draws it — but the language still does.
+/// </remarks>
+public sealed class LocalizationService : ObservableObject, ILocalizationService
+{
+    /// <summary>
+    /// The name WPF reports when an indexer changes. Spelt out rather than taken from
+    /// <c>Binding.IndexerName</c>: that constant lives in PresentationFramework, and
+    /// Core is read by the agent, which does not load WPF.
+    /// </summary>
+    public const string IndexerName = "Item[]";
+
+    private static readonly ResourceManager Resources =
+        new("CursorLang.Core.Resources.Strings", typeof(LocalizationService).Assembly);
+
+    private CultureInfo _culture = CultureInfo.GetCultureInfo("en");
+
+    public string this[string key] => Resources.GetString(key, _culture) ?? key;
+
+    public IReadOnlyList<LanguageOption> AvailableLanguages { get; } =
+    [
+        new LanguageOption("en", "English"),
+        new LanguageOption("ru", "Русский"),
+    ];
+
+    public string CurrentLanguage
+    {
+        get => _culture.TwoLetterISOLanguageName;
+        set
+        {
+            if (string.IsNullOrWhiteSpace(value) || value == CurrentLanguage)
+            {
+                return;
+            }
+
+            _culture = CultureInfo.GetCultureInfo(value);
+            CultureInfo.CurrentUICulture = _culture;
+
+            OnPropertyChanged(nameof(CurrentLanguage));
+
+            // We report a change of the indexer: that is how every binding of the
+            // {Binding Localization[Key]} kind updates, that is, all the interface text
+            OnPropertyChanged(IndexerName);
+        }
+    }
+}