Port Editor and ted settings to MEC

examples/ted/EditorSettings.cs

@@ -1,92 +1,149 @@
+using System.Globalization;
 using System.Text.Json;
 using System.Text.Json.Nodes;
+using Microsoft.Extensions.Configuration;
 using Terminal.Gui.App;
 using Terminal.Gui.Configuration;
 
 namespace Ted;
 
+#pragma warning disable CS0618 // Keep legacy CM attributes until Terminal.Gui fully removes CM.
+
 /// <summary>
-///     ted's persisted editor settings. These are real Terminal.Gui configuration properties
-///     (<see cref="ConfigurationPropertyAttribute" />, <see cref="AppSettingsScope" />), so
-///     <see cref="ConfigurationManager" /> is the single authority for <b>reading</b> them: enabling
-///     CM (see <c>Program.cs</c>) loads <c>~/.tui/ted.config.json</c> and applies the values to these
-///     static properties. ted does no parsing of its own.
+///     ted's persisted editor settings. Microsoft.Extensions.Configuration is the primary read path:
+///     startup loads <c>~/.tui/ted.config.json</c> and applies the values to these static properties
+///     before <see cref="TedApp" /> is constructed. Legacy CM attributes are retained only so older
+///     Terminal.Gui builds can still apply the previous <see cref="AppSettingsScope" /> format.
 ///     <para>
-///         <see cref="Save(string)" /> is hand-rolled only because Terminal.Gui exposes no API for
-///         writing a user config file. It emits the exact shape CM reads: app-defined
-///         (<see cref="AppSettingsScope" />) properties live nested under a top-level
-///         <c>"AppSettings"</c> object, keyed <c>DeclaringType.PropertyName</c>. Other top-level keys
-///         a user may have added (e.g. <c>"Theme"</c>) are preserved; JSONC comments are not.
-///         Any legacy flat root-level <c>"EditorSettings.*"</c> keys from the pre-CM format are
-///         dropped on save (migration).
+///         <see cref="Save(string)" /> writes the MEC-native shape:
+///         <c>"EditorSettings": { "WordWrap": true }</c>. Other top-level keys a user may have added
+///         are preserved; JSONC comments are not. Legacy flat root-level
+///         <c>"EditorSettings.*"</c> keys and old CM <c>"AppSettings"</c> entries are dropped on save
+///         once migrated.
 ///     </para>
 /// </summary>
 internal static class EditorSettings
 {
+    internal const string SectionName = "EditorSettings";
+
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool LineNumbers { get; set; } = true;
+    public static bool LineNumbers
+    {
+        get => Defaults.LineNumbers;
+        set => Defaults.LineNumbers = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool FoldIndicators { get; set; } = true;
+    public static bool FoldIndicators
+    {
+        get => Defaults.FoldIndicators;
+        set => Defaults.FoldIndicators = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool WordWrap { get; set; }
+    public static bool WordWrap
+    {
+        get => Defaults.WordWrap;
+        set => Defaults.WordWrap = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool ShowTabs { get; set; }
+    public static bool ShowTabs
+    {
+        get => Defaults.ShowTabs;
+        set => Defaults.ShowTabs = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static int IndentSize { get; set; } = 4;
+    public static int IndentSize
+    {
+        get => Defaults.IndentSize;
+        set => Defaults.IndentSize = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool ConvertTabsToSpaces { get; set; } = true;
+    public static bool ConvertTabsToSpaces
+    {
+        get => Defaults.ConvertTabsToSpaces;
+        set => Defaults.ConvertTabsToSpaces = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool AutoIndent { get; set; } = true;
+    public static bool AutoIndent
+    {
+        get => Defaults.AutoIndent;
+        set => Defaults.AutoIndent = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool Scrollbars { get; set; } = true;
+    public static bool Scrollbars
+    {
+        get => Defaults.Scrollbars;
+        set => Defaults.Scrollbars = value;
+    }
 
     [ConfigurationProperty (Scope = typeof (AppSettingsScope))]
-    public static bool AutoComplete { get; set; }
+    public static bool AutoComplete
+    {
+        get => Defaults.AutoComplete;
+        set => Defaults.AutoComplete = value;
+    }
+
+    internal static EditorSettingsValues Defaults { get; set; } = new ();
+
+    internal static IConfiguration BuildConfiguration (string path)
+    {
+        return new ConfigurationBuilder ()
+            .AddJsonFile (path, true, false)
+            .Build ();
+    }
+
+    internal static void Load (string path)
+    {
+        Apply (BuildConfiguration (path));
+    }
+
+    internal static void Apply (IConfiguration configuration)
+    {
+        ArgumentNullException.ThrowIfNull (configuration);
+
+        EditorSettingsValues settings = new ();
+        ApplyLegacyDottedKeys (configuration, settings);
+        ApplyLegacyDottedKeys (configuration.GetSection ("AppSettings"), settings);
+        configuration.GetSection (SectionName).Bind (settings);
+        Defaults = settings;
+    }
+
+    internal static void ResetDefaults ()
+    {
+        Defaults = new EditorSettingsValues ();
+    }
 
     internal static void Save (string path)
     {
         try
         {
             JsonObject root = ReadRoot (path);
 
-            // Migration: drop legacy flat root-level "EditorSettings.*" keys (the pre-CM
-            // hand-rolled format). CM reads ted's settings only from the "AppSettings" object.
-            foreach (var legacyKey in root
-                         .Where (kvp => kvp.Key.StartsWith ("EditorSettings.", StringComparison.Ordinal))
-                         .Select (kvp => kvp.Key)
-                         .ToList ())
-            {
-                root.Remove (legacyKey);
-            }
-
-            JsonObject appSettings;
+            RemoveLegacyDottedKeys (root);
 
-            if (root["AppSettings"] is JsonObject existing)
+            if (root["AppSettings"] is JsonObject appSettings)
             {
-                appSettings = existing;
-            }
-            else
-            {
-                appSettings = new JsonObject ();
-                root["AppSettings"] = appSettings;
+                RemoveLegacyDottedKeys (appSettings);
             }
 
-            appSettings["EditorSettings.LineNumbers"] = LineNumbers;
-            appSettings["EditorSettings.FoldIndicators"] = FoldIndicators;
-            appSettings["EditorSettings.WordWrap"] = WordWrap;
-            appSettings["EditorSettings.ShowTabs"] = ShowTabs;
-            appSettings["EditorSettings.IndentSize"] = IndentSize;
-            appSettings["EditorSettings.ConvertTabsToSpaces"] = ConvertTabsToSpaces;
-            appSettings["EditorSettings.AutoIndent"] = AutoIndent;
-            appSettings["EditorSettings.AutoComplete"] = AutoComplete;
-            appSettings["EditorSettings.Scrollbars"] = Scrollbars;
+            root[SectionName] = new JsonObject
+            {
+                [nameof (LineNumbers)] = LineNumbers,
+                [nameof (FoldIndicators)] = FoldIndicators,
+                [nameof (WordWrap)] = WordWrap,
+                [nameof (ShowTabs)] = ShowTabs,
+                [nameof (IndentSize)] = IndentSize,
+                [nameof (ConvertTabsToSpaces)] = ConvertTabsToSpaces,
+                [nameof (AutoIndent)] = AutoIndent,
+                [nameof (AutoComplete)] = AutoComplete,
+                [nameof (Scrollbars)] = Scrollbars
+            };
 
             var directory = Path.GetDirectoryName (path);
 
@@ -137,4 +194,75 @@ private static JsonObject ReadRoot (string path)
 
         return node as JsonObject ?? new JsonObject ();
     }
+
+    private static void ApplyLegacyDottedKeys (IConfiguration configuration, EditorSettingsValues settings)
+    {
+        ApplyLegacyBoolean (configuration, nameof (LineNumbers), value => settings.LineNumbers = value);
+        ApplyLegacyBoolean (configuration, nameof (FoldIndicators), value => settings.FoldIndicators = value);
+        ApplyLegacyBoolean (configuration, nameof (WordWrap), value => settings.WordWrap = value);
+        ApplyLegacyBoolean (configuration, nameof (ShowTabs), value => settings.ShowTabs = value);
+        ApplyLegacyInt32 (configuration, nameof (IndentSize), value => settings.IndentSize = value);
+        ApplyLegacyBoolean (configuration, nameof (ConvertTabsToSpaces), value => settings.ConvertTabsToSpaces = value);
+        ApplyLegacyBoolean (configuration, nameof (AutoIndent), value => settings.AutoIndent = value);
+        ApplyLegacyBoolean (configuration, nameof (Scrollbars), value => settings.Scrollbars = value);
+        ApplyLegacyBoolean (configuration, nameof (AutoComplete), value => settings.AutoComplete = value);
+    }
+
+    private static void ApplyLegacyBoolean (IConfiguration configuration, string propertyName, Action<bool> apply)
+    {
+        var value = configuration[$"{SectionName}.{propertyName}"];
+
+        if (value is null)
+        {
+            return;
+        }
+
+        apply (bool.Parse (value));
+    }
+
+    private static void ApplyLegacyInt32 (IConfiguration configuration, string propertyName, Action<int> apply)
+    {
+        var value = configuration[$"{SectionName}.{propertyName}"];
+
+        if (value is null)
+        {
+            return;
+        }
+
+        apply (int.Parse (value, CultureInfo.InvariantCulture));
+    }
+
+    private static void RemoveLegacyDottedKeys (JsonObject json)
+    {
+        foreach (var legacyKey in json
+                     .Where (kvp => kvp.Key.StartsWith ($"{SectionName}.", StringComparison.Ordinal))
+                     .Select (kvp => kvp.Key)
+                     .ToList ())
+        {
+            json.Remove (legacyKey);
+        }
+    }
+
+    internal sealed class EditorSettingsValues
+    {
+        public bool LineNumbers { get; set; } = true;
+
+        public bool FoldIndicators { get; set; } = true;
+
+        public bool WordWrap { get; set; }
+
+        public bool ShowTabs { get; set; }
+
+        public int IndentSize { get; set; } = 4;
+
+        public bool ConvertTabsToSpaces { get; set; } = true;
+
+        public bool AutoIndent { get; set; } = true;
+
+        public bool Scrollbars { get; set; } = true;
+
+        public bool AutoComplete { get; set; }
+    }
 }
+
+#pragma warning restore CS0618

examples/ted/Program.cs

@@ -2,17 +2,14 @@
 
 using Ted;
 using Terminal.Gui.App;
-using Terminal.Gui.Configuration;
 
 // ReSharper disable AccessToDisposedClosure
 
 Hosting.ConfigureLogging ();
 Hosting.EnableTracing ();
 
-// ConfigurationManager is the single authority for reading settings: Enable (All) loads
-// ~/.tui/ted.config.json (ConfigLocations.AppHome) and applies the values to the
-// EditorSettings [ConfigurationProperty] statics before TedApp is constructed.
-ConfigurationManager.Enable (ConfigLocations.All);
+// Prefer Terminal.Gui's MEC builder when present; fall back to CM for released Terminal.Gui.
+TerminalGuiConfigurationBootstrap.Apply ();
 
 using IApplication app = Application.Create ();
 

examples/ted/TerminalGuiConfigurationBootstrap.cs

@@ -0,0 +1,64 @@
+using System.Reflection;
+using Microsoft.Extensions.Configuration;
+using Terminal.Gui.Configuration;
+using Terminal.Gui.Editor.Configuration;
+using ConfigurationManager = Terminal.Gui.Configuration.ConfigurationManager;
+
+namespace Ted;
+
+#pragma warning disable CS0618 // ConfigurationManager is a compatibility fallback for released Terminal.Gui.
+
+internal static class TerminalGuiConfigurationBootstrap
+{
+    private const string TuiConfigurationBuilderTypeName =
+        "Terminal.Gui.Configuration.TuiConfigurationBuilder, Terminal.Gui";
+
+    internal static void Apply ()
+    {
+        if (TryApplyMec ())
+        {
+            return;
+        }
+
+        ConfigurationManager.Enable (ConfigLocations.All);
+        IConfiguration configuration = EditorSettings.BuildConfiguration (EditorSettings.GetConfigPath ());
+        EditorConfiguration.Apply (configuration);
+        EditorSettings.Apply (configuration);
+    }
+
+    private static bool TryApplyMec ()
+    {
+        Type? builderType = Type.GetType (TuiConfigurationBuilderTypeName, false);
+
+        if (builderType is null)
+        {
+            return false;
+        }
+
+        var builder = Activator.CreateInstance (builderType, "ted")
+                      ?? throw new InvalidOperationException ($"Unable to create {builderType.FullName}.");
+
+        MethodInfo applyToStaticFacades = builderType.GetMethod ("ApplyToStaticFacades", Type.EmptyTypes)
+                                          ?? throw new MissingMethodException (builderType.FullName,
+                                              "ApplyToStaticFacades");
+
+        applyToStaticFacades.Invoke (builder, null);
+
+        PropertyInfo configurationProperty = builderType.GetProperty ("Configuration")
+                                             ?? throw new MissingMemberException (builderType.FullName,
+                                                 "Configuration");
+
+        if (configurationProperty.GetValue (builder) is not IConfiguration configuration)
+        {
+            throw new InvalidOperationException (
+                $"{builderType.FullName}.Configuration did not return IConfiguration.");
+        }
+
+        EditorConfiguration.Apply (configuration);
+        EditorSettings.Apply (configuration);
+
+        return true;
+    }
+}
+
+#pragma warning restore CS0618

examples/ted/ted.csproj

@@ -26,6 +26,8 @@
   </ItemGroup>
 
   <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Configuration.Binder" Version="10.0.0" />
+    <PackageReference Include="Microsoft.Extensions.Configuration.Json" Version="10.0.0" />
     <ProjectReference Include="..\..\src\Terminal.Gui.Editor\Terminal.Gui.Editor.csproj" />
     <PackageReference Include="Terminal.Gui" Version="$(TerminalGuiVersion)" />
     <PackageReference Include="Serilog" Version="4.3.1" />