tmp: test wrapping issue:4824, 4830 and issue:4831 textblock don;t update

samples/ControlCatalog.NetCore/ControlCatalog.NetCore.csproj

@@ -10,6 +10,7 @@
     <ProjectReference Include="..\..\src\Avalonia.Headless.Vnc\Avalonia.Headless.Vnc.csproj" />
     <ProjectReference Include="..\..\src\Avalonia.Dialogs\Avalonia.Dialogs.csproj" />
     <ProjectReference Include="..\..\src\Linux\Avalonia.LinuxFramebuffer\Avalonia.LinuxFramebuffer.csproj" />
+    <ProjectReference Include="..\..\src\Windows\Avalonia.Direct2D1\Avalonia.Direct2D1.csproj" />
     <ProjectReference Include="..\ControlCatalog\ControlCatalog.csproj" />
     <ProjectReference Include="..\..\src\Avalonia.X11\Avalonia.X11.csproj" />
     <PackageReference Include="Avalonia.Angle.Windows.Natives" Version="2.1.0.2020091801" />

samples/ControlCatalog/Pages/TextBlockPage.xaml

@@ -1,6 +1,11 @@
 <UserControl x:Class="ControlCatalog.Pages.TextBlockPage"
              xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
+  <!--<UserControl.Styles>
+    <Style Selector="TextBlock">
+      <Setter Property="Background" Value="Transparent" />
+    </Style>
+  </UserControl.Styles>-->
   <StackPanel>
     <TextBlock Classes="h2">A control that can display text</TextBlock>
     <WrapPanel MaxWidth="680"
@@ -28,9 +33,25 @@
           <TextBlock Text="Right aligned text" TextAlignment="Right" />
         </StackPanel>
       </Border>
+      <Border>
+        <StackPanel Width="300" Spacing="8">
+          <TextBlock Text="text update issue 4824:" />
+          <TextBlock x:Name="txtChanging" />
+          <TextPresenter x:Name="tpChanging" />
+          <Button x:Name="btn" Content="Update" />
+          <TextBlock Text="TextWrapping right/left issue- 4830:" />
+          <Panel HorizontalAlignment="Left">
+            <Border BorderBrush="Blue" BorderThickness="2">
+              <TextPresenter Text="0123456 0123456 0123456 0123456"  Width="80"
+                  TextWrapping="Wrap" TextAlignment="Right" Background="Yellow" HorizontalAlignment="Left"/>
+            </Border>
+            <Border Width="2" HorizontalAlignment="Center"  BorderBrush="Gray" Opacity="0.3" BorderThickness="1" />
+          </Panel>
+        </StackPanel>
+      </Border>
       <Border>
         <StackPanel Spacing="8">
-          <TextBlock Text="Multiline TextBlock with TextWrapping.&#xD;&#xD;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est." TextWrapping="Wrap" />
+          <TextBlock Text="new line\r\n &#x0d;&#x0a;new line\r &#x0a;new line\n &#x0d;Multiline TextBlock with TextWrapping.&#xD;&#xD;Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus magna. Cras in mi at felis aliquet congue. Ut a est eget ligula molestie gravida. Curabitur massa. Donec eleifend, libero at sagittis mollis, tellus est malesuada tellus, at luctus turpis elit sit amet quam. Vivamus pretium ornare est." TextWrapping="Wrap" />
         </StackPanel>
       </Border>
       <Border>
@@ -55,6 +76,7 @@
       </Border>
       <Border>
         <StackPanel Spacing="8">
+          <TextBlock Text="new line\n\r &#x0a;&#x0d;new line\r\n &#x0d;&#x0a;new line\n &#x0a;new line\r &#x0d;last line"/>
           <TextBlock Text="Underline" TextDecorations="Underline" />
           <TextBlock Text="Strikethrough" TextDecorations="Strikethrough" />
           <TextBlock Text="Overline" TextDecorations="Overline" />
@@ -110,6 +132,7 @@
           <TextBlock Text="🏽 👌🏽" />
           <TextBlock Text="🏾 👌🏾" />
           <TextBlock Text="🏿 👌🏿" />
+          <TextPresenter Text="🏿 👌🏿"/>
         </StackPanel>
       </Border>
       <Border>

samples/ControlCatalog/Pages/TextBlockPage.xaml.cs

@@ -1,5 +1,8 @@
+using System;
 using Avalonia.Controls;
+using Avalonia.Controls.Presenters;
 using Avalonia.Markup.Xaml;
+using Avalonia.Threading;
 
 namespace ControlCatalog.Pages
 {
@@ -8,6 +11,24 @@ namespace ControlCatalog.Pages
         public TextBlockPage()
         {
             this.InitializeComponent();
+
+            var txtChanging = this.Get<TextBlock>("txtChanging");
+            var tpChanging = this.Get<TextPresenter>("tpChanging");
+
+            void update()
+            {
+                var time = DateTime.Now.TimeOfDay.ToString();
+                txtChanging.Text = $"TextBlock: {time}";
+                tpChanging.Text = $"TextPresenter: {time}";
+            }
+            var btn = this.Get<Button>("btn");
+            btn.Click += (s, e) => update();
+            //DispatcherTimer.Run(() =>
+            //{
+            //    update();
+            //    return true;
+            //}, TimeSpan.FromSeconds(1));
+
         }
 
         private void InitializeComponent()

tests/Avalonia.Skia.UnitTests/Media/TextFormatting/TextLayoutTests.cs

@@ -324,6 +324,34 @@ namespace Avalonia.Skia.UnitTests.Media.TextFormatting
             }
         }
 
+        [Fact(Skip= "enable when fixed 4830 textwrap not aligned properly with center/right")]
+        public void Test_Wrapping_lines_With_Space_Are_Equal_Width()
+        {
+            using (Start())
+            {
+                const string text =
+                    "foo foo foo foo";
+
+                var foreground = new SolidColorBrush(Colors.Red).ToImmutable();
+
+
+                var layout = new TextLayout(
+                    text,
+                    Typeface.Default,
+                    12.0f,
+                    Brushes.Black.ToImmutable(),
+                    textWrapping: TextWrapping.Wrap,
+                    maxWidth: 30);
+
+                var expected = layout.TextLines[0].LineMetrics.Size.Width;
+
+                foreach(var l in layout.TextLines.Skip(1))
+                {
+                    Assert.Equal(expected, l.LineMetrics.Size.Width);
+                }
+            }
+        }
+
         [Fact]
         public void Should_Apply_TextStyleSpan_To_MultiLine()
         {