[UWP] Wrap the Editor Placeholder Text

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue13037.xaml

@@ -0,0 +1,26 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<controls:TestContentPage
+    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:controls="clr-namespace:Xamarin.Forms.Controls"
+    mc:Ignorable="d"
+    x:Class="Xamarin.Forms.Controls.Issues.Issue13037"
+    Title="Issue 13037">
+    <ContentPage.Content>
+        <StackLayout>
+            <Label
+                Padding="12"
+                BackgroundColor="Black"
+                TextColor="White"
+                Text="If a long text in the Editor Placeholder wraps (as in other platforms), the test has passed."/>
+            <Editor
+                VerticalOptions="FillAndExpand" 
+                HorizontalOptions="FillAndExpand"
+                MaxLength="4000"
+                Placeholder="Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."
+                PlaceholderColor="Gray" />
+        </StackLayout>
+    </ContentPage.Content>
+</controls:TestContentPage>

Xamarin.Forms.Controls.Issues/Xamarin.Forms.Controls.Issues.Shared/Issue13037.xaml.cs

@@ -0,0 +1,21 @@
+using Xamarin.Forms.CustomAttributes;
+
+namespace Xamarin.Forms.Controls.Issues
+{
+	[Issue(IssueTracker.Github, 13037, "[Bug] Placeholder text in Editor control does not wrap text on UWP",	
+		PlatformAffected.UWP)]
+	public partial class Issue13037 : TestContentPage
+	{
+		public Issue13037()
+		{
+#if APP
+			InitializeComponent();
+#endif
+		}
+
+		protected override void Init()
+		{
+
+		}
+	}
+}

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

@@ -52,6 +52,9 @@
     <Compile Include="$(MSBuildThisFileDirectory)Issue12246.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue12652.cs" />
     <Compile Include="$(MSBuildThisFileDirectory)Issue12714.cs" />
+    <Compile Include="$(MSBuildThisFileDirectory)Issue13037.xaml.cs">
+      <DependentUpon>Issue13037.xaml</DependentUpon>
+    </Compile>
     <Compile Include="$(MSBuildThisFileDirectory)Issue2447.xaml.cs">
       <DependentUpon>Issue2447.xaml</DependentUpon>
     </Compile>
@@ -2515,6 +2518,10 @@
     </EmbeddedResource>
   </ItemGroup>
   <ItemGroup>
+    <EmbeddedResource Include="$(MSBuildThisFileDirectory)Issue13037.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </EmbeddedResource>
     <EmbeddedResource Include="$(MSBuildThisFileDirectory)Issue2447.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>

Xamarin.Forms.Platform.UAP/FormsTextBoxStyle.xaml

@@ -221,10 +221,10 @@
 						              VerticalScrollBarVisibility="{TemplateBinding ScrollViewer.VerticalScrollBarVisibility}"
 						              VerticalScrollMode="{TemplateBinding ScrollViewer.VerticalScrollMode}" ZoomMode="Disabled"
                                       VerticalContentAlignment="{TemplateBinding VerticalContentAlignment}"/>
-						<ContentControl x:Name="PlaceholderTextContentPresenter" Grid.ColumnSpan="2"
-						                Content="{TemplateBinding PlaceholderText}"
+						<TextBlock x:Name="PlaceholderTextContentPresenter" Grid.ColumnSpan="2"
+						                Text="{TemplateBinding PlaceholderText}" TextWrapping="Wrap"
 						                Foreground="{TemplateBinding PlaceholderForegroundBrush}" IsHitTestVisible="False"
-						                IsTabStop="False" Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
+						                Margin="{TemplateBinding BorderThickness}" Padding="{TemplateBinding Padding}"
 						                Grid.Row="1"
 						                HorizontalAlignment="{Binding TextAlignment, 
                                             RelativeSource={RelativeSource Mode=TemplatedParent},