[Android] Fix Label word wrapping clips text depending on alignment and layout options

src/Controls/tests/TestCases.HostApp/Issues/Issue34459.cs

@@ -0,0 +1,29 @@
+namespace Maui.Controls.Sample.Issues
+{
+	[Issue(IssueTracker.Github, 34459, "Android Label word wrapping clips text depending on alignment and layout options", PlatformAffected.Android)]
+	public class Issue34459 : ContentPage
+	{
+		public Issue34459()
+		{
+			var rtlLabel = new Label
+			{
+				Text = "Hello, World!",
+				VerticalOptions = LayoutOptions.Start,
+				HorizontalOptions = LayoutOptions.Start,
+				HorizontalTextAlignment = TextAlignment.Start,
+				LineBreakMode = LineBreakMode.WordWrap,
+				FontSize = 32,
+				AutomationId = "RtlLabel",
+			};
+
+			Content = new VerticalStackLayout
+			{
+				BackgroundColor = Colors.Gray,
+				FlowDirection = FlowDirection.RightToLeft,
+				WidthRequest = 150,
+				AutomationId = "RtlContainer",
+				Children = { rtlLabel },
+			};
+		}
+	}
+}

src/Controls/tests/TestCases.Shared.Tests/Tests/Issues/Issue34459.cs

@@ -0,0 +1,22 @@
+#if TEST_FAILS_ON_IOS && TEST_FAILS_ON_CATALYST // https://github.com/dotnet/maui/issues/34531
+using NUnit.Framework;
+using UITest.Appium;
+using UITest.Core;
+
+namespace Microsoft.Maui.TestCases.Tests.Issues;
+
+public class Issue34459 : _IssuesUITest
+{
+	public override string Issue => "Android Label word wrapping clips text depending on alignment and layout options";
+
+	public Issue34459(TestDevice device) : base(device) { }
+
+	[Test]
+	[Category(UITestCategories.Label)]
+	public void LabelWordWrapNotClippedWithRtlFlowDirection()
+	{
+		App.WaitForElement("RtlLabel");
+		VerifyScreenshot();
+	}
+}
+#endif

src/Core/src/Handlers/Label/LabelHandler.Android.cs

@@ -30,15 +30,32 @@ public override Size GetDesiredSize(double widthConstraint, double heightConstra
 				PlatformView.Ellipsize == null)
 			{
 				float maxLineWidth = 0;
+				float maxLineRight = 0;
 				for (int i = 0; i < layout.LineCount; i++)
 				{
 					float lineWidth = layout.GetLineWidth(i);
 					if (lineWidth > maxLineWidth)
 						maxLineWidth = lineWidth;
+
+					// GetLineRight() captures the true visual right edge, including RTL/bidi
+					// offsets that GetLineWidth() can under-report for non-left-anchored text.
+					float lineRight = layout.GetLineRight(i);
+					if (lineRight > maxLineRight)
+					{
+						maxLineRight = lineRight;
+					}
 				}
 
 				if (maxLineWidth > 0)
 				{
+					// If any line's visual right edge exceeds the computed content width,
+					// narrowing to that width would clip the text (e.g. RTL/bidi in an RTL
+					// container). Return the original size without an extra measure pass.
+					if (maxLineRight > maxLineWidth)
+					{
+						return size;
+					}
+
 					var actualWidth = Context.FromPixels(maxLineWidth + PlatformView.PaddingLeft + PlatformView.PaddingRight);
 					if (actualWidth < size.Width)
 					{