feat: Replace Editor With AvalonEdit

src/MimaSim/MimaSim/App.axaml

@@ -3,7 +3,6 @@
              xmlns:local="using:MimaSim"
              x:Class="MimaSim.App"
              RequestedThemeVariant="Light">
-             <!-- "Default" ThemeVariant follows system theme variant. "Dark" or "Light" are other available options. -->
 
     <Application.DataTemplates>
         <local:ViewLocator/>
@@ -18,6 +17,7 @@
         <StyleInclude Source="avares://MimaSim/Styles/ButtonStyles.axaml" />
 
         <FluentTheme />
+        <StyleInclude Source="avares://AvaloniaEdit/Themes/Fluent/AvaloniaEdit.xaml" />
     </Application.Styles>
 
     <Application.Resources>

src/MimaSim/MimaSim/Behaviors/DocumentTextBindingBehavior.cs

@@ -0,0 +1,60 @@
+using System;
+using Avalonia;
+using Avalonia.Xaml.Interactivity;
+using AvaloniaEdit;
+
+namespace MimaSim.Behaviors;
+
+public class DocumentTextBindingBehavior : Behavior<TextEditor>
+{
+    private TextEditor _textEditor;
+
+    public static readonly StyledProperty<string> TextProperty =
+        AvaloniaProperty.Register<DocumentTextBindingBehavior, string>(nameof(Text));
+
+    public string Text
+    {
+        get => GetValue(TextProperty);
+        set => SetValue(TextProperty, value);
+    }
+
+    protected override void OnAttached()
+    {
+        base.OnAttached();
+
+        if (AssociatedObject is TextEditor textEditor)
+        {
+            _textEditor = textEditor;
+            _textEditor.TextChanged += TextChanged;
+            this.GetObservable(TextProperty).Subscribe(TextPropertyChanged);
+        }
+    }
+
+    protected override void OnDetaching()
+    {
+        base.OnDetaching();
+
+        if (_textEditor != null)
+        {
+            _textEditor.TextChanged -= TextChanged;
+        }
+    }
+
+    private void TextChanged(object sender, EventArgs eventArgs)
+    {
+        if (_textEditor != null && _textEditor.Document != null)
+        {
+            Text = _textEditor.Document.Text;
+        }
+    }
+
+    private void TextPropertyChanged(string text)
+    {
+        if (_textEditor != null && _textEditor.Document != null && text != null)
+        {
+            var caretOffset = _textEditor.CaretOffset;
+            _textEditor.Document.Text = text;
+            //_textEditor.CaretOffset = caretOffset;
+        }
+    }
+}

src/MimaSim/MimaSim/Controls/ProgramEditorControl.axaml

@@ -2,14 +2,23 @@
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-             xmlns:c="clr-namespace:MimaSim.Controls;assembly=MimaSim" x:CompileBindings="False"
+             xmlns:c="clr-namespace:MimaSim.Controls;assembly=MimaSim"
+             xmlns:avaloniaEdit="https://github.com/avaloniaui/avaloniaedit"
+             xmlns:i="clr-namespace:Avalonia.Xaml.Interactivity;assembly=Avalonia.Xaml.Interactivity"
+             xmlns:behaviors="clr-namespace:MimaSim.Behaviors"
+             x:CompileBindings="False"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
              x:Class="MimaSim.Controls.ProgramEditorControl">
   <Grid ColumnDefinitions="AUTO,*,AUTO" RowDefinitions="35,*,35">
     <c:ExecutionBar Grid.Column="0" Grid.Row="0" Margin="5,3,0,0" />
 
-    <TextBox Text="{Binding Source, Mode=TwoWay}" TextWrapping="Wrap" AcceptsTab="True" AcceptsReturn="True" Watermark="Programmcode hier eingeben" MinWidth="150" MaxHeight="450" MinHeight="150" Grid.Row="1" Grid.ColumnSpan="3"
-             Grid.Column="0" Margin="0,5,0,5" />
+    <avaloniaEdit:TextEditor MinWidth="150" MaxHeight="450" MinHeight="150" Grid.Column="0" Grid.Row="1" Grid.ColumnSpan="3"
+                             FontFamily="Cascadia Code,Consolas,Menlo,Monospace" Margin="0,5,0,5"
+                             ShowLineNumbers="True">
+        <i:Interaction.Behaviors>
+            <behaviors:DocumentTextBindingBehavior Text="{Binding Source, Mode=TwoWay}"/>
+        </i:Interaction.Behaviors>
+    </avaloniaEdit:TextEditor>
 
     <ComboBox Grid.Row="2" Grid.Column="0" MinWidth="110" HorizontalAlignment="Right" VerticalAlignment="Bottom" ItemsSource="{Binding LanguageNames}"  SelectedItem="{Binding SelectedLanguage, Mode=TwoWay}" />
     <ComboBox Grid.Row="2" Grid.Column="1" MinWidth="110" HorizontalAlignment="Right" VerticalAlignment="Bottom" ItemsSource="{Binding SampleNames, Mode=TwoWay}"  SelectedItem="{Binding SelectedSample, Mode=TwoWay}" />

src/MimaSim/MimaSim/MimaSim.csproj

@@ -15,11 +15,13 @@
 
     <ItemGroup>
         <PackageReference Include="Avalonia" Version="11.1.3" />
+        <PackageReference Include="Avalonia.AvaloniaEdit" Version="11.1.0" />
         <PackageReference Include="Avalonia.Themes.Fluent" Version="11.1.3" />
         <PackageReference Include="Avalonia.Fonts.Inter" Version="11.1.3" />
         <PackageReference Include="Avalonia.ReactiveUI" Version="11.1.3" />
         <!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
         <PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.1.3" />
+        <PackageReference Include="Avalonia.Xaml.Interactions" Version="11.1.0.4" />
         <PackageReference Include="ReactiveUI" Version="20.1.63" />
     </ItemGroup>