Improve TextAlignmentExtensionsGenerator (#172)

* Improve TextAlignmentExtensionsGenerator

* Cleanup

* Delete unused

* Fix formatting

* Update formatting

* `dotnet format`

* Add `SupportPartialClasses` Unit Test

* Update `SupportPartialClasses`

---------

Co-authored-by: Brandon Minnick <13558917+brminnick@users.noreply.github.com>

src/CommunityToolkit.Maui.Markup.SourceGenerators/CommunityToolkit.Maui.Markup.SourceGenerators.csproj

@@ -1,4 +1,4 @@
-<Project Sdk="Microsoft.NET.Sdk">
+<Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
     <TargetFramework>netstandard2.0</TargetFramework>
@@ -10,6 +10,7 @@
   <ItemGroup>
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="4.4.0" PrivateAssets="all" />
     <PackageReference Include="Microsoft.CodeAnalysis.Analyzers" Version="3.3.4" PrivateAssets="all" />
+    <PackageReference Include="PolySharp" Version="1.12.1" PrivateAssets="all" IncludeAssets="build; analyzers" />
   </ItemGroup>
 
 </Project>

src/CommunityToolkit.Maui.Markup.SourceGenerators/Extensions/EquatableArray{T}.cs

@@ -0,0 +1,190 @@
+using System.Collections;
+using System.Collections.Immutable;
+using System.Diagnostics.CodeAnalysis;
+using System.Runtime.CompilerServices;
+
+// Inspired by https://github.com/CommunityToolkit/dotnet/blob/main/src/CommunityToolkit.Mvvm.SourceGenerators/Helpers/EquatableArray%7BT%7D.cs
+namespace CommunityToolkit.Maui.Markup.SourceGenerators;
+
+/// <summary>
+/// Extensions for <see cref="EquatableArray{T}"/>.
+/// </summary>
+static class EquatableArray
+{
+	/// <summary>
+	/// Creates an <see cref="EquatableArray{T}"/> instance from a given <see cref="ImmutableArray{T}"/>.
+	/// </summary>
+	/// <typeparam name="T">The type of items in the input array.</typeparam>
+	/// <param name="array">The input <see cref="ImmutableArray{T}"/> instance.</param>
+	/// <returns>An <see cref="EquatableArray{T}"/> instance from a given <see cref="ImmutableArray{T}"/>.</returns>
+	public static EquatableArray<T> AsEquatableArray<T>(this ImmutableArray<T> array)
+		where T : IEquatable<T>
+	{
+		return new(array);
+	}
+}
+
+/// <summary>
+/// An imutable, equatable array. This is equivalent to <see cref="ImmutableArray{T}"/> but with value equality support.
+/// </summary>
+/// <typeparam name="T">The type of values in the array.</typeparam>
+readonly struct EquatableArray<T> : IEquatable<EquatableArray<T>>, IEnumerable<T>
+	where T : IEquatable<T>
+{
+	/// <summary>
+	/// The underlying <typeparamref name="T"/> array.
+	/// </summary>
+	readonly T[]? array;
+
+	/// <summary>
+	/// Creates a new <see cref="EquatableArray{T}"/> instance.
+	/// </summary>
+	/// <param name="array">The input <see cref="ImmutableArray{T}"/> to wrap.</param>
+	public EquatableArray(ImmutableArray<T> array)
+	{
+		this.array = Unsafe.As<ImmutableArray<T>, T[]?>(ref array);
+	}
+
+	/// <summary>
+	/// Gets a reference to an item at a specified position within the array.
+	/// </summary>
+	/// <param name="index">The index of the item to retrieve a reference to.</param>
+	/// <returns>A reference to an item at a specified position within the array.</returns>
+	public ref readonly T this[int index]
+	{
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		get => ref AsImmutableArray().ItemRef(index);
+	}
+
+	/// <summary>
+	/// Implicitly converts an <see cref="ImmutableArray{T}"/> to <see cref="EquatableArray{T}"/>.
+	/// </summary>
+	/// <returns>An <see cref="EquatableArray{T}"/> instance from a given <see cref="ImmutableArray{T}"/>.</returns>
+	public static implicit operator EquatableArray<T>(ImmutableArray<T> array)
+	{
+		return FromImmutableArray(array);
+	}
+
+	/// <summary>
+	/// Implicitly converts an <see cref="EquatableArray{T}"/> to <see cref="ImmutableArray{T}"/>.
+	/// </summary>
+	/// <returns>An <see cref="ImmutableArray{T}"/> instance from a given <see cref="EquatableArray{T}"/>.</returns>
+	public static implicit operator ImmutableArray<T>(EquatableArray<T> array)
+	{
+		return array.AsImmutableArray();
+	}
+
+	/// <summary>
+	/// Checks whether two <see cref="EquatableArray{T}"/> values are the same.
+	/// </summary>
+	/// <param name="left">The first <see cref="EquatableArray{T}"/> value.</param>
+	/// <param name="right">The second <see cref="EquatableArray{T}"/> value.</param>
+	/// <returns>Whether <paramref name="left"/> and <paramref name="right"/> are equal.</returns>
+	public static bool operator ==(EquatableArray<T> left, EquatableArray<T> right)
+	{
+		return left.Equals(right);
+	}
+
+	/// <summary>
+	/// Checks whether two <see cref="EquatableArray{T}"/> values are not the same.
+	/// </summary>
+	/// <param name="left">The first <see cref="EquatableArray{T}"/> value.</param>
+	/// <param name="right">The second <see cref="EquatableArray{T}"/> value.</param>
+	/// <returns>Whether <paramref name="left"/> and <paramref name="right"/> are not equal.</returns>
+	public static bool operator !=(EquatableArray<T> left, EquatableArray<T> right)
+	{
+		return !left.Equals(right);
+	}
+
+	/// <summary>
+	/// Gets a value indicating whether the current array is empty.
+	/// </summary>
+	public bool IsEmpty
+	{
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		get => AsImmutableArray().IsEmpty;
+	}
+
+	/// <summary>
+	/// Creates an <see cref="EquatableArray{T}"/> instance from a given <see cref="ImmutableArray{T}"/>.
+	/// </summary>
+	/// <param name="array">The input <see cref="ImmutableArray{T}"/> instance.</param>
+	/// <returns>An <see cref="EquatableArray{T}"/> instance from a given <see cref="ImmutableArray{T}"/>.</returns>
+	public static EquatableArray<T> FromImmutableArray(ImmutableArray<T> array)
+	{
+		return new(array);
+	}
+
+	/// <sinheritdoc/>
+	public bool Equals(EquatableArray<T> array)
+	{
+		return AsSpan().SequenceEqual(array.AsSpan());
+	}
+
+	/// <sinheritdoc/>
+	public override bool Equals([NotNullWhen(true)] object? obj)
+	{
+		return obj is EquatableArray<T> array && Equals(this, array);
+	}
+
+	/// <sinheritdoc/>
+	public override int GetHashCode()
+	{
+		if (this.array is not T[] array)
+		{
+			return 0;
+		}
+
+		// Not ideal, but does the job. Diverges from original implementation https://github.com/CommunityToolkit/dotnet/blob/main/src/CommunityToolkit.Mvvm.SourceGenerators/Helpers/EquatableArray%7BT%7D.cs
+		return array.Length;
+	}
+
+	/// <summary>
+	/// Gets an <see cref="ImmutableArray{T}"/> instance from the current <see cref="EquatableArray{T}"/>.
+	/// </summary>
+	/// <returns>The <see cref="ImmutableArray{T}"/> from the current <see cref="EquatableArray{T}"/>.</returns>
+	[MethodImpl(MethodImplOptions.AggressiveInlining)]
+	public ImmutableArray<T> AsImmutableArray()
+	{
+		return Unsafe.As<T[]?, ImmutableArray<T>>(ref Unsafe.AsRef(in this.array));
+	}
+
+	/// <summary>
+	/// Returns a <see cref="ReadOnlySpan{T}"/> wrapping the current items.
+	/// </summary>
+	/// <returns>A <see cref="ReadOnlySpan{T}"/> wrapping the current items.</returns>
+	public ReadOnlySpan<T> AsSpan()
+	{
+		return AsImmutableArray().AsSpan();
+	}
+
+	/// <summary>
+	/// Copies the contents of this <see cref="EquatableArray{T}"/> instance. to a mutable array.
+	/// </summary>
+	/// <returns>The newly instantiated array.</returns>
+	public T[] ToArray()
+	{
+		return AsImmutableArray().ToArray();
+	}
+
+	/// <summary>
+	/// Gets an <see cref="ImmutableArray{T}.Enumerator"/> value to traverse items in the current array.
+	/// </summary>
+	/// <returns>An <see cref="ImmutableArray{T}.Enumerator"/> value to traverse items in the current array.</returns>
+	public ImmutableArray<T>.Enumerator GetEnumerator()
+	{
+		return AsImmutableArray().GetEnumerator();
+	}
+
+	/// <sinheritdoc/>
+	IEnumerator<T> IEnumerable<T>.GetEnumerator()
+	{
+		return ((IEnumerable<T>)AsImmutableArray()).GetEnumerator();
+	}
+
+	/// <sinheritdoc/>
+	IEnumerator IEnumerable.GetEnumerator()
+	{
+		return ((IEnumerable)AsImmutableArray()).GetEnumerator();
+	}
+}

src/CommunityToolkit.Maui.Markup.SourceGenerators/Extensions/NamespaceSymbolExtensions.cs

@@ -142,23 +142,4 @@ public static string GetGenericTypeConstraintsAsString(this INamedTypeSymbol typ
 
 		return result.ToString();
 	}
-
-	public static bool ContainsSymbolBaseType(this IEnumerable<INamedTypeSymbol> namedSymbolList, INamedTypeSymbol symbol)
-	{
-		INamedTypeSymbol? baseType = symbol.BaseType;
-
-		while (baseType is not null)
-		{
-			var doesListContainBaseType = namedSymbolList.Any(x => x.Equals(baseType, SymbolEqualityComparer.Default));
-
-			if (doesListContainBaseType)
-			{
-				return true;
-			}
-
-			baseType = baseType.BaseType;
-		}
-
-		return false;
-	}
 }