[Win] Labels will now wrap when inside horizontally infinite layouts (#639)

* Add repro for 42559

* [Win] Override GetDesiredSize for LabelRenderer

* [Win] Invalidate size on font/align change

2 files changed, 68 insertions, 0 deletions

diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42599.cs b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42599.cs
new file mode 100644
index 00000000..f10b3f4a
--- /dev/null
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Bugzilla42599.cs
@@ -0,0 +1,67 @@
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+using System.Linq;
+using System;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Bugzilla, 42599, "LineBreakMode does not work on UWP", PlatformAffected.WinRT)]
+	public class Bugzilla42599 : TestContentPage
+	{
+		protected override void Init()
+		{
+			var scrollView = new ScrollView();
+			var layout = new StackLayout();
+
+			foreach (var lineBreakMode in Enum.GetValues(typeof(LineBreakMode)).Cast<LineBreakMode>())
+			{
+				layout.Children.Add(GetLayout(lineBreakMode));
+			}
+			scrollView.Content = layout;
+			Content = scrollView;
+		}
+
+		static StackLayout GetLayout(LineBreakMode lineBreakMode)
+		{
+			var text = "";
+
+			switch (lineBreakMode)
+			{
+				default:
+				case LineBreakMode.NoWrap:
+					text = "This is a long sentence that should NOT wrap. If this sentence has wrapped, then this test has failed.";
+					break;
+				case LineBreakMode.WordWrap:
+					text = "This is a long sentence that should word wrap. If this sentence has NOT wrapped, then this test has failed.";
+					break;
+				case LineBreakMode.CharacterWrap:
+					text = "This is a long sentence that should character wrap. If this sentence has NOT wrapped, then this test has failed.";
+					break;
+				case LineBreakMode.HeadTruncation:
+					text = "This is a long sentence that should truncate at the beginning. If this sentence has NOT truncated, then this test has failed.";
+					break;
+				case LineBreakMode.TailTruncation:
+					text = "This is a long sentence that should truncate at the end. If this sentence has NOT truncated, then this test has failed.";
+					break;
+				case LineBreakMode.MiddleTruncation:
+					text = "This is a long sentence that should truncate at the middle. If this sentence has NOT truncated, then this test has failed.";
+					break;
+			}
+
+			var label = new Label
+			{
+				LineBreakMode = lineBreakMode,
+				Text = text,
+			};
+
+			var layout = new StackLayout
+			{
+				Children = { label },
+				Orientation = StackOrientation.Horizontal
+			};
+
+			return layout;
+		}
+	}
+}
\ No newline at end of file
diff --git a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
index 866b23f8..47097774 100644
--- a/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
+++ b/Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems
@@ -231,6 +231,7 @@
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla28650.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla37431.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla44777.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Bugzilla42599.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla51503.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla51505.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Bugzilla52533.cs" />