DeepClone: Use sourcegenerator to fix trimming issues (#32)

Author: ScarletKuro

src/MudBlazor.ThemeManager/Components/MudThemeManager.razor.cs

@@ -1,7 +1,6 @@
 using Microsoft.AspNetCore.Components;
 using MudBlazor.State;
 using MudBlazor.ThemeManager.Extensions;
-using System.Diagnostics.CodeAnalysis;
 
 namespace MudBlazor.ThemeManager;
 
@@ -49,7 +48,6 @@ public MudThemeManager()
     [Parameter]
     public EventCallback<ThemeManagerTheme> ThemeChanged { get; set; }
 
-    [RequiresUnreferencedCode("JSON serialization and deserialization might require types that cannot be statically analyzed.")]
     protected override void OnInitialized()
     {
         base.OnInitialized();

src/MudBlazor.ThemeManager/Extensions/Extension.cs

@@ -1,22 +1,98 @@
-using System.Diagnostics.CodeAnalysis;
-using System.Text.Json;
+using System.Text.Json;
 
 namespace MudBlazor.ThemeManager.Extensions;
 
 internal static class Extension
 {
-    private static readonly JsonSerializerOptions JsonOptions = new();
+    private static readonly PaletteSerializerContext PaletteSerializerContext = new();
+    private static readonly ThemeSerializerContext ThemeSerializerContext = new();
 
-    [RequiresUnreferencedCode("JSON serialization and deserialization might require types that cannot be statically analyzed.")]
-    public static T? DeepClone<T>(this T source)
+    public static MudTheme DeepClone(this MudTheme source)
     {
-        if (source is not null)
+        // TODO: Needs this to be done https://github.com/MudBlazor/MudBlazor/pull/9434
+        //var themeType = typeof(MudTheme);
+        //var serializeStr = JsonSerializer.Serialize(source, themeType, ThemeSerializerContext);
+        //var copyObj = (MudTheme?)JsonSerializer.Deserialize(serializeStr, themeType, ThemeSerializerContext);
+
+        //return copyObj;
+
+        // Code below is a workaround for the above issue
+
+        return new MudTheme
+        {
+            PaletteDark = source.PaletteDark.DeepClone() ?? new PaletteDark(),
+            PaletteLight = source.PaletteLight.DeepClone() ?? new PaletteLight(),
+            Shadows = DeepCloneTheme(source.Shadows) ?? new Shadow(),
+            LayoutProperties = DeepCloneTheme(source.LayoutProperties) ?? new LayoutProperties(),
+            ZIndex = DeepCloneTheme(source.ZIndex) ?? new ZIndex(),
+            PseudoCss = DeepCloneTheme(source.PseudoCss) ?? new PseudoCss(),
+            // Exception case
+            Typography = new Typography
+            {
+                Default = DeepCloneBaseTypography(source.Typography.Default),
+                H1 = DeepCloneBaseTypography(source.Typography.H1),
+                H2 = DeepCloneBaseTypography(source.Typography.H2),
+                H3 = DeepCloneBaseTypography(source.Typography.H3),
+                H4 = DeepCloneBaseTypography(source.Typography.H4),
+                H5 = DeepCloneBaseTypography(source.Typography.H5),
+                H6 = DeepCloneBaseTypography(source.Typography.H6),
+                Subtitle1 = DeepCloneBaseTypography(source.Typography.Subtitle1),
+                Subtitle2 = DeepCloneBaseTypography(source.Typography.Subtitle2),
+                Body1 = DeepCloneBaseTypography(source.Typography.Body1),
+                Body2 = DeepCloneBaseTypography(source.Typography.Body2),
+                Input = DeepCloneBaseTypography(source.Typography.Input),
+                Button = DeepCloneBaseTypography(source.Typography.Button),
+                Caption = DeepCloneBaseTypography(source.Typography.Caption),
+                Overline = DeepCloneBaseTypography(source.Typography.Overline)
+            }
+        };
+    }
+
+    public static PaletteDark? DeepClone(this PaletteDark source) => DeepClonePalette(source);
+
+    public static PaletteLight? DeepClone(this PaletteLight source) => DeepClonePalette(source);
+
+    private static T? DeepClonePalette<T>(T source) where T : Palette
+    {
+        var paletteType = typeof(T);
+        var serializeStr = JsonSerializer.Serialize(source, paletteType, PaletteSerializerContext);
+        var copyObj = (T?)JsonSerializer.Deserialize(serializeStr, paletteType, PaletteSerializerContext);
+
+        return copyObj;
+    }
+
+    private static T? DeepCloneTheme<T>(T source) where T : class
+    {
+        var paletteType = typeof(T);
+        var serializeStr = JsonSerializer.Serialize(source, paletteType, ThemeSerializerContext);
+        var copyObj = (T?)JsonSerializer.Deserialize(serializeStr, paletteType, ThemeSerializerContext);
+
+        return copyObj;
+    }
+
+    private static T DeepCloneBaseTypography<T>(T baseTypography) where T : BaseTypography, new()
+    {
+        string[] fontFamilyCloned = new string[baseTypography.FontFamily?.Length ?? 0];
+        if (baseTypography.FontFamily is not null)
         {
-            var serializeStr = JsonSerializer.Serialize(source, JsonOptions);
-            var copyObj = JsonSerializer.Deserialize<T>(serializeStr, JsonOptions);
-            return copyObj;
+            Array.Copy(baseTypography.FontFamily, fontFamilyCloned, baseTypography.FontFamily.Length);
         }
 
-        return default;
+
+        var fontWeightCloned = baseTypography.FontWeight;
+        var fontSizeCloned = baseTypography.FontSize;
+        var lineHeightCloned = baseTypography.LineHeight;
+        var letterSpacingCloned = baseTypography.LetterSpacing;
+        var textTransformCloned = baseTypography.TextTransform;
+
+        return new T
+        {
+            FontWeight = fontWeightCloned,
+            FontFamily = fontFamilyCloned,
+            FontSize = fontSizeCloned,
+            LineHeight = lineHeightCloned,
+            LetterSpacing = letterSpacingCloned,
+            TextTransform = textTransformCloned,
+        };
     }
 }

src/MudBlazor.ThemeManager/Extensions/PaletteSerializerContext.cs

@@ -0,0 +1,8 @@
+using System.Text.Json.Serialization;
+
+namespace MudBlazor.ThemeManager.Extensions;
+
+[JsonSerializable(typeof(Palette))]
+[JsonSerializable(typeof(PaletteDark))]
+[JsonSerializable(typeof(PaletteLight))]
+internal sealed partial class PaletteSerializerContext : JsonSerializerContext;

src/MudBlazor.ThemeManager/Extensions/ThemeSerializerContext.cs

@@ -0,0 +1,11 @@
+using System.Text.Json.Serialization;
+
+namespace MudBlazor.ThemeManager.Extensions;
+
+
+//[JsonSerializable(typeof(MudTheme))] TODO: Needs this to be done https://github.com/MudBlazor/MudBlazor/pull/9434 rest can be removed after
+[JsonSerializable(typeof(Shadow))]
+[JsonSerializable(typeof(LayoutProperties))]
+[JsonSerializable(typeof(ZIndex))]
+[JsonSerializable(typeof(PseudoCss))]
+internal sealed partial class ThemeSerializerContext : JsonSerializerContext;

src/MudBlazor.ThemeManager/MudBlazor.ThemeManager.csproj

@@ -2,6 +2,7 @@
 
   <PropertyGroup>
     <TargetFrameworks>net7.0;net8.0</TargetFrameworks>
+    <LangVersion>latest</LangVersion>
     <ImplicitUsings>enable</ImplicitUsings>
     <Nullable>enable</Nullable>
     <IsTrimmable>true</IsTrimmable>