[iOS] Text alignment in editor - improvements (#24859)

* [iOS] Text alignment in editor - improvements

* Update Issue24583.cs

* Try old way but use content height

* less noise

* Added the first batch of snapshots

* add more screenshots

---------

Co-authored-by: tj-devel709 <[email protected]>

src/Controls/tests/TestCases.HostApp/Issues/Issue24583.cs

@@ -0,0 +1,17 @@
+namespace Maui.Controls.Sample.Issues;
+
+[XamlCompilation(XamlCompilationOptions.Compile)]
+[Issue(IssueTracker.Github, 24583, "Text in the Editor control disappeared when reducing the Scale", PlatformAffected.iOS)]
+
+public partial class Issue24583 : ContentPage
+{
+	public Issue24583()
+	{
+		InitializeComponent();
+	}
+
+	private void Button_Clicked(object sender, EventArgs e)
+	{
+		editor1.Scale = editor2.Scale = editor3.Scale = 0.5;
+	}
+}

src/Controls/tests/TestCases.HostApp/Issues/Issue24583.xaml

@@ -0,0 +1,32 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             x:Class="Maui.Controls.Sample.Issues.Issue24583">
+    <StackLayout>
+        <Editor x:Name="editor1"
+                Text="1 2 3 4 5 6 7 8 9"
+                FontSize="50"
+                HeightRequest="200"
+                BackgroundColor="Red"
+                HorizontalOptions="Fill"
+                WidthRequest="300"/>
+        <Editor x:Name="editor2"
+                Text="1 2 3 4 5 6 7 8 9"
+                FontSize="50"
+                HeightRequest="200"
+                VerticalTextAlignment="Center"
+                BackgroundColor="Green"
+                HorizontalOptions="Fill"
+                WidthRequest="300"/>
+        <Editor x:Name="editor3"
+            Text="1 2 3 4 5 6 7 8 9"
+            FontSize="50"
+            HeightRequest="200"
+            VerticalTextAlignment="End"
+            BackgroundColor="Blue"
+            HorizontalOptions="Fill"
+            WidthRequest="300"/>
+        <Button Clicked="Button_Clicked"
+                AutomationId="button"/>
+    </StackLayout>
+</ContentPage>

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue24583.cs

@@ -0,0 +1,23 @@
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+public class Issue24583 : _IssuesUITest
+{
+	public override string Issue => "Text in the Editor control disappeared when reducing the Scale";
+
+	public Issue24583(TestDevice testDevice) : base(testDevice)
+	{
+	}
+
+	[Test]
+	[Category(UITestCategories.Editor)]
+	public void TextInEditorShouldBeCorrectlyPositionedAfterResizing()
+	{
+		App.WaitForElement("button");
+		VerifyScreenshot("TextsInEditorsBeforeScaling");
+		App.Click("button");
+		VerifyScreenshot("TextsInEditorsAfterScaling");
+	}
+}

src/Core/src/Platform/iOS/MauiTextView.cs

@@ -162,9 +162,8 @@ void OnChanged(object? sender, EventArgs e)
 
 		void ShouldCenterVertically()
 		{
-			var fittingSize = new CGSize(Bounds.Width, NFloat.MaxValue);
-			var sizeThatFits = SizeThatFits(fittingSize);
-			var availableSpace = Bounds.Height - sizeThatFits.Height * ZoomScale;
+			var contentHeight = ContentSize.Height;
+			var availableSpace = Bounds.Height - contentHeight * ZoomScale;
 			if (availableSpace <= 0)
 				return;
 			ContentOffset = VerticalTextAlignment switch