[UWP] Attempt to resolve entry on UWP not correctly calculating the correct height when in a scroll view

Xamarin.Forms.ControlGallery.WindowsUniversal/CustomRenderers.cs

@@ -1,5 +1,7 @@
-using System.ComponentModel;
+using System;
+using System.ComponentModel;
 using System.Linq;
+using Windows.UI.Xaml;
 using Windows.UI.Xaml.Controls;
 using Windows.UI.Xaml.Input;
 using Windows.UI.Xaml.Media;
@@ -12,6 +14,8 @@
 [assembly: ExportRenderer(typeof(Issue1683.EntryKeyboardFlags), typeof(EntryRendererKeyboardFlags))]
 [assembly: ExportRenderer(typeof(Issue1683.EditorKeyboardFlags), typeof(EditorRendererKeyboardFlags))]
 [assembly: ExportRenderer(typeof(Issue3273.SortableListView), typeof(SortableListViewRenderer))]
+[assembly: ExportRenderer(typeof(Issue2172OldEntry), typeof(Issue2172OldEntryRenderer))]
+[assembly: ExportRenderer(typeof(Issue2172OldEditor), typeof(Issue2172OldEditorRenderer))]
 namespace Xamarin.Forms.ControlGallery.WindowsUniversal
 {
 	public class EntryRendererKeyboardFlags : EntryRenderer
@@ -163,4 +167,107 @@ protected override void OnElementChanged(ElementChangedEventArgs<BoxView> e)
 			m_Canvas.Children.Add(text);
 		}
 	}
+
+	public class Issue2172OldEntryRenderer : EntryRenderer
+	{
+		public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			if (Children.Count == 0 || Control == null)
+				return new SizeRequest();
+
+			var constraint = new Windows.Foundation.Size(widthConstraint, heightConstraint);
+			FormsTextBox child = Control;
+
+			child.Measure(constraint);
+			var result = new Size(Math.Ceiling(child.DesiredSize.Width), Math.Ceiling(child.DesiredSize.Height));
+
+			return new SizeRequest(result);
+		}
+	}
+
+	public class Issue2172OldEditorRenderer : EditorRenderer
+	{
+		static FormsTextBox _copyOfTextBox;
+		static Windows.Foundation.Size _zeroSize = new Windows.Foundation.Size(0, 0);
+
+		FormsTextBox CreateTextBox()
+		{
+			return new FormsTextBox
+			{
+				AcceptsReturn = true,
+				TextWrapping = TextWrapping.Wrap,
+				Style = Windows.UI.Xaml.Application.Current.Resources["FormsTextBoxStyle"] as Windows.UI.Xaml.Style
+			};
+		}
+
+		/*
+		 * Purely invalidating the layout as text is added to the TextBox will not cause it to expand.
+		 * If the TextBox is set to WordWrap and it is part of the layout it will refuse to Measure itself beyond its established width.
+		 * Even giving it infinite constraints will cause it to always set its DesiredSize to the same width but with a vertical growth.
+		 * The only way I was able to grow it was by setting layout renderers width explicitly to some value but then it just set its own Width to that Width which is not helpful.
+		 * Even vertically it would measure oddly in cases of rapid text changes.
+		 * Holding down the backspace key or enter key would cause the final result to be not quite right.
+		 * Both of these issues were fixed by just creating a static TextBox that is not part of the layout which let me just measure
+		 * the size of the text as it would fit into the TextBox unconstrained and then just return that Size from the GetDesiredSize call.
+		 * */
+		Size GetCopyOfSize(FormsTextBox control, Windows.Foundation.Size constraint)
+		{
+			if (_copyOfTextBox == null)
+			{
+				_copyOfTextBox = CreateTextBox();
+
+				// This causes the copy to be initially setup correctly. 
+				// I found that if the first measure of this copy occurs with Text then it will just keep defaulting to a measure with no text.
+				_copyOfTextBox.Measure(_zeroSize);
+			}
+
+			_copyOfTextBox.Text = control.Text;
+			_copyOfTextBox.FontSize = control.FontSize;
+			_copyOfTextBox.FontFamily = control.FontFamily;
+			_copyOfTextBox.FontStretch = control.FontStretch;
+			_copyOfTextBox.FontStyle = control.FontStyle;
+			_copyOfTextBox.FontWeight = control.FontWeight;
+			_copyOfTextBox.Margin = control.Margin;
+			_copyOfTextBox.Padding = control.Padding;
+
+			// have to reset the measure to zero before it will re-measure itself
+			_copyOfTextBox.Measure(_zeroSize);
+			_copyOfTextBox.Measure(constraint);
+
+			Size result = new Size
+			(
+				Math.Ceiling(_copyOfTextBox.DesiredSize.Width),
+				Math.Ceiling(_copyOfTextBox.DesiredSize.Height)
+			);
+
+			return result;
+		}
+
+
+		SizeRequest CalculateDesiredSizes(FormsTextBox control, Windows.Foundation.Size constraint, EditorAutoSizeOption sizeOption)
+		{
+			if (sizeOption == EditorAutoSizeOption.TextChanges)
+			{
+				Size result = GetCopyOfSize(control, constraint);
+				control.Measure(constraint);
+				return new SizeRequest(result);
+			}
+			else
+			{
+				control.Measure(constraint);
+				Size result = new Size(Math.Ceiling(control.DesiredSize.Width), Math.Ceiling(control.DesiredSize.Height));
+				return new SizeRequest(result);
+			}
+		}
+
+		public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			FormsTextBox child = Control;
+
+			if (Children.Count == 0 || child == null)
+				return new SizeRequest();
+
+			return CalculateDesiredSizes(child, new Windows.Foundation.Size(widthConstraint, heightConstraint), Element.AutoSize);
+		}
+	}
 }

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2172.xaml

@@ -0,0 +1,49 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<ContentPage
+    xmlns:controls="clr-namespace:Xamarin.Forms.Controls"
+    xmlns="http://xamarin.com/schemas/2014/forms"
+             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
+             xmlns:d="http://xamarin.com/schemas/2014/forms/design"
+             xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+             xmlns:issues="clr-namespace:Xamarin.Forms.Controls.Issues"
+             mc:Ignorable="d"
+             x:Class="Xamarin.Forms.Controls.Issues.Issue2172">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label FontSize="25" Text="Using new measure code, no text should be clipped"></Label>
+            <ScrollView VerticalScrollBarVisibility="Always">
+                <Grid BackgroundColor="Green" Padding="5">
+                    <StackLayout>
+                        <StackLayout>
+                            <Entry FontSize="30" Text="{Binding Number}" />
+                            <Entry FontSize="25" Text="Nested" />
+                            <Entry FontSize="25" />
+                            <Label FontSize="25" Text="Label"/>
+                            <Editor FontSize="25" Text="Editor"></Editor>
+                            <Editor FontSize="25" Text="Auto Size Editor, add more lines to test." AutoSize="TextChanges"></Editor>
+                        </StackLayout>
+                    </StackLayout>
+                </Grid>
+            </ScrollView>
+
+            <BoxView HeightRequest="10" Color="Black"></BoxView>
+
+            <Label FontSize="25" Text="Using old measure code, some text should be clipped.  Don't resize the window."></Label>
+            <ScrollView VerticalScrollBarVisibility="Always">
+                <Grid BackgroundColor="Red" Padding="5">
+                    <StackLayout>
+                        <StackLayout>
+                            <issues:Issue2172OldEntry FontSize="30" Text="{Binding Number}" />
+                            <issues:Issue2172OldEntry FontSize="25" Text="Nested" />
+                            <issues:Issue2172OldEntry FontSize="25" />
+                            <Label FontSize="25" Text="Label"/>
+                            <issues:Issue2172OldEditor FontSize="25" Text="Editor"></issues:Issue2172OldEditor>
+                            <issues:Issue2172OldEditor FontSize="25" Text="Auto Size Editor, add more lines to test." AutoSize="TextChanges"></issues:Issue2172OldEditor>
+                        </StackLayout>
+                    </StackLayout>
+                </Grid>
+            </ScrollView>
+        </StackLayout>
+
+    </ContentPage.Content>
+</ContentPage>

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue2172.xaml.cs

@@ -0,0 +1,33 @@
+using Xamarin.Forms.CustomAttributes;
+using Xamarin.Forms.Internals;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Preserve(AllMembers = true)]
+	[Issue(IssueTracker.Github, 2172, "Height of Entry with data binding incorrect on UWP when Entry in ScrollView in Grid", PlatformAffected.UWP)]
+	public partial class Issue2172 : ContentPage
+	{
+		public Issue2172()
+		{
+#if APP
+			InitializeComponent();			
+#endif
+			BindingContext = new Issue2172ViewModel();
+		}
+
+		public class Issue2172ViewModel
+		{
+			public string Number => "Bound Text";
+		}
+	}
+
+	public class Issue2172OldEntry : Entry
+	{
+
+	}
+
+	public class Issue2172OldEditor : Editor
+	{
+
+	}
+}

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Xamarin.Forms.Controls.Issues.Shared.projitems

@@ -36,6 +36,10 @@
     </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Issue7773.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue8186.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue2172.xaml.cs">
+      <DependentUpon>Issue2172.xaml</DependentUpon>
+      <SubType>Code</SubType>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Issue3475.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue5749.xaml.cs">
       <SubType>Code</SubType>
@@ -1763,4 +1767,10 @@
       <Generator>MSBuild:Compile</Generator>
     </EmbeddedResource>
   </ItemGroup>
+  <ItemGroup>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Issue2172.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </EmbeddedResource>
+  </ItemGroup>
 </Project>

Xamarin.Forms.Platform.UAP/EditorRenderer.cs

@@ -12,8 +12,6 @@ namespace Xamarin.Forms.Platform.UWP
 {
 	public class EditorRenderer : ViewRenderer<Editor, FormsTextBox>
 	{
-		private static FormsTextBox _copyOfTextBox;
-		static Windows.Foundation.Size _zeroSize = new Windows.Foundation.Size(0, 0);
 		bool _fontApplied;
 		Brush _backgroundColorFocusedDefaultBrush;
 		Brush _textDefaultBrush;
@@ -179,65 +177,6 @@ void OnNativeTextChanged(object sender, Windows.UI.Xaml.Controls.TextChangedEven
 			Element.SetValueCore(Editor.TextProperty, Control.Text);
 		}
 
-		/*
-		 * Purely invalidating the layout as text is added to the TextBox will not cause it to expand.
-		 * If the TextBox is set to WordWrap and it is part of the layout it will refuse to Measure itself beyond its established width.
-		 * Even giving it infinite constraints will cause it to always set its DesiredSize to the same width but with a vertical growth.
-		 * The only way I was able to grow it was by setting layout renderers width explicitly to some value but then it just set its own Width to that Width which is not helpful.
-		 * Even vertically it would measure oddly in cases of rapid text changes.
-		 * Holding down the backspace key or enter key would cause the final result to be not quite right.
-		 * Both of these issues were fixed by just creating a static TextBox that is not part of the layout which let me just measure
-		 * the size of the text as it would fit into the TextBox unconstrained and then just return that Size from the GetDesiredSize call.
-		 * */
-		Size GetCopyOfSize(FormsTextBox control, Windows.Foundation.Size constraint)
-		{
-			if (_copyOfTextBox == null)
-			{
-				_copyOfTextBox = CreateTextBox();
-
-				// This causes the copy to be initially setup correctly. 
-				// I found that if the first measure of this copy occurs with Text then it will just keep defaulting to a measure with no text.
-				_copyOfTextBox.Measure(_zeroSize);
-			}
-
-			_copyOfTextBox.Text = control.Text;
-			_copyOfTextBox.FontSize = control.FontSize;
-			_copyOfTextBox.FontFamily = control.FontFamily;
-			_copyOfTextBox.FontStretch = control.FontStretch;
-			_copyOfTextBox.FontStyle = control.FontStyle;
-			_copyOfTextBox.FontWeight = control.FontWeight;
-			_copyOfTextBox.Margin = control.Margin;
-			_copyOfTextBox.Padding = control.Padding;
-
-			// have to reset the measure to zero before it will re-measure itself
-			_copyOfTextBox.Measure(_zeroSize);
-			_copyOfTextBox.Measure(constraint);
-
-			Size result = new Size
-			(
-				Math.Ceiling(_copyOfTextBox.DesiredSize.Width),
-				Math.Ceiling(_copyOfTextBox.DesiredSize.Height)
-			);
-
-			return result;
-		}
-
-
-		SizeRequest CalculateDesiredSizes(FormsTextBox control, Windows.Foundation.Size constraint, EditorAutoSizeOption sizeOption)
-		{
-			if (sizeOption == EditorAutoSizeOption.TextChanges)
-			{
-				Size result = GetCopyOfSize(control, constraint);
-				control.Measure(constraint);
-				return new SizeRequest(result);
-			}
-			else
-			{
-				control.Measure(constraint);
-				Size result = new Size(Math.Ceiling(control.DesiredSize.Width), Math.Ceiling(control.DesiredSize.Height));
-				return new SizeRequest(result);
-			}
-		}
 
 		public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
 		{
@@ -246,7 +185,10 @@ public override SizeRequest GetDesiredSize(double widthConstraint, double height
 			if (Children.Count == 0 || child == null)
 				return new SizeRequest();
 
-			return CalculateDesiredSizes(child, new Windows.Foundation.Size(widthConstraint, heightConstraint), Element.AutoSize);
+			var constraint = new Windows.Foundation.Size(widthConstraint, heightConstraint);
+			child.Measure(constraint);
+			var result = FormsTextBox.GetCopyOfSize(child, constraint);
+			return new SizeRequest(result);
 		}
 
 		void UpdateFont()

Xamarin.Forms.Platform.UAP/EntryRenderer.cs

@@ -457,5 +457,18 @@ void UpdateIsReadOnly()
 		{
 			Control.IsReadOnly = Element.IsReadOnly;
 		}
+
+		public override SizeRequest GetDesiredSize(double widthConstraint, double heightConstraint)
+		{
+			FormsTextBox child = Control;
+
+			if (Children.Count == 0 || child == null)
+				return new SizeRequest();
+
+			var constraint = new Windows.Foundation.Size(widthConstraint, heightConstraint);
+            child.Measure(constraint);
+			var result = FormsTextBox.GetCopyOfSize(child, constraint);
+			return new SizeRequest(result);
+		}
 	}
 }