Moved the core parsing utility out into a core lib, kept a console application for easier debugging of parsing, and added a startpoint of a gui application

XSDVisualiser.Core/XSDVisualiser.Core.csproj

@@ -0,0 +1,12 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+  <ItemGroup>
+    <Compile Include="..\XSDVisualiser\Models\**\*.cs" Link="Models\%(RecursiveDir)%(Filename)%(Extension)" />
+    <Compile Include="..\XSDVisualiser\Parsing\**\*.cs" Link="Parsing\%(RecursiveDir)%(Filename)%(Extension)" />
+    <Compile Include="..\XSDVisualiser\Utils\**\*.cs" Link="Utils\%(RecursiveDir)%(Filename)%(Extension)" />
+  </ItemGroup>
+</Project>

XSDVisualiser.Desktop/App.axaml

@@ -0,0 +1,8 @@
+<Application xmlns="https://github.com/avaloniaui"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:fluent="using:Avalonia.Themes.Fluent"
+             x:Class="XSDVisualiser.Desktop.App">
+  <Application.Styles>
+    <fluent:FluentTheme />
+  </Application.Styles>
+</Application>

XSDVisualiser.Desktop/App.axaml.cs

@@ -0,0 +1,23 @@
+using Avalonia;
+using Avalonia.Controls.ApplicationLifetimes;
+using Avalonia.Markup.Xaml;
+
+namespace XSDVisualiser.Desktop
+{
+    public partial class App : Application
+    {
+        public override void Initialize()
+        {
+            AvaloniaXamlLoader.Load(this);
+        }
+
+        public override void OnFrameworkInitializationCompleted()
+        {
+            if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop)
+            {
+                desktop.MainWindow = new MainWindow();
+            }
+            base.OnFrameworkInitializationCompleted();
+        }
+    }
+}

XSDVisualiser.Desktop/MainWindow.axaml

@@ -0,0 +1,10 @@
+<Window xmlns="https://github.com/avaloniaui"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        x:Class="XSDVisualiser.Desktop.MainWindow"
+        Title="XSD Visualiser" Width="1000" Height="700">
+    <StackPanel Margin="12" Spacing="8">
+        <TextBlock Text="XSD Visualiser (Avalonia)" FontSize="18"/>
+        <Button Content="Open XSD and parse" x:Name="OpenBtn" Width="200"/>
+        <TextBox x:Name="Output" AcceptsReturn="True" Height="600" TextWrapping="Wrap" FontFamily="Consolas"/>
+    </StackPanel>
+</Window>

XSDVisualiser.Desktop/MainWindow.axaml.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+using Avalonia.Threading;
+using XSDVisualiser.Parsing;
+using XSDVisualiser.Utils;
+
+namespace XSDVisualiser.Desktop
+{
+    public partial class MainWindow : Window
+    {
+        private Button _openBtn = null!;
+        private TextBox _output = null!;
+
+        public MainWindow()
+        {
+            InitializeComponent();
+            _openBtn = this.FindControl<Button>("OpenBtn");
+            _output = this.FindControl<TextBox>("Output");
+            _openBtn.Click += OpenBtn_Click;
+        }
+
+        private async void OpenBtn_Click(object? sender, RoutedEventArgs e)
+        {
+            var ofd = new OpenFileDialog
+            {
+                AllowMultiple = false,
+                Title = "Open XSD file"
+            };
+            ofd.Filters!.Add(new FileDialogFilter { Name = "XSD schema", Extensions = { "xsd" } });
+            var files = await ofd.ShowAsync(this);
+            if (files != null && files.Length > 0)
+            {
+                await ParseAndShowAsync(files[0]);
+            }
+        }
+
+        private Task ParseAndShowAsync(string path)
+        {
+            return Task.Run(() =>
+            {
+                try
+                {
+                    var parser = new XsdSchemaParser();
+                    var model = parser.Parse(path);
+                    var text = Serialization.ToJson(model);
+                    Dispatcher.UIThread.Post(() => _output.Text = text);
+                }
+                catch (Exception ex)
+                {
+                    Dispatcher.UIThread.Post(() => _output.Text = ex.ToString());
+                }
+            });
+        }
+    }
+}

XSDVisualiser.Desktop/Program.cs

@@ -0,0 +1,21 @@
+using System;
+using Avalonia;
+using Avalonia.ReactiveUI;
+
+namespace XSDVisualiser.Desktop
+{
+    internal static class Program
+    {
+        [STAThread]
+        public static void Main(string[] args)
+        {
+            BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+        }
+
+        public static AppBuilder BuildAvaloniaApp() =>
+            AppBuilder.Configure<App>()
+                .UsePlatformDetect()
+                .LogToTrace()
+                .UseReactiveUI();
+    }
+}

XSDVisualiser.Desktop/XSDVisualiser.Desktop.csproj

@@ -0,0 +1,19 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <PropertyGroup>
+    <OutputType>WinExe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Avalonia" Version="11.1.3" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.1.3" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.1.3" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.1.3" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="11.1.3" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\XSDVisualiser.Core\XSDVisualiser.Core.csproj" />
+  </ItemGroup>
+</Project>

XSDVisualiser.sln

@@ -2,6 +2,10 @@
 Microsoft Visual Studio Solution File, Format Version 12.00
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XSDVisualiser", "XSDVisualiser\XSDVisualiser.csproj", "{A42F0483-69BE-44FC-8147-DA3466375051}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XSDVisualiser.Core", "XSDVisualiser.Core\XSDVisualiser.Core.csproj", "{0B7B9C8D-8215-4E64-9B3A-2B8F9C7B3E11}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "XSDVisualiser.Desktop", "XSDVisualiser.Desktop\XSDVisualiser.Desktop.csproj", "{1C2D3E4F-5061-7283-94A5-B6C7D8E9F0A1}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -12,5 +16,13 @@ Global
 		{A42F0483-69BE-44FC-8147-DA3466375051}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{A42F0483-69BE-44FC-8147-DA3466375051}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{A42F0483-69BE-44FC-8147-DA3466375051}.Release|Any CPU.Build.0 = Release|Any CPU
+		{0B7B9C8D-8215-4E64-9B3A-2B8F9C7B3E11}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{0B7B9C8D-8215-4E64-9B3A-2B8F9C7B3E11}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{0B7B9C8D-8215-4E64-9B3A-2B8F9C7B3E11}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{0B7B9C8D-8215-4E64-9B3A-2B8F9C7B3E11}.Release|Any CPU.Build.0 = Release|Any CPU
+		{1C2D3E4F-5061-7283-94A5-B6C7D8E9F0A1}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{1C2D3E4F-5061-7283-94A5-B6C7D8E9F0A1}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{1C2D3E4F-5061-7283-94A5-B6C7D8E9F0A1}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{1C2D3E4F-5061-7283-94A5-B6C7D8E9F0A1}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 EndGlobal

XSDVisualiser/XSDVisualiser.csproj

@@ -1,10 +1,16 @@
 <Project Sdk="Microsoft.NET.Sdk">
-
+  <PropertyGroup>
-    <PropertyGroup>
+    <OutputType>Exe</OutputType>
-        <OutputType>Exe</OutputType>
+    <TargetFramework>net9.0</TargetFramework>
-        <TargetFramework>net9.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
-        <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
-        <Nullable>enable</Nullable>
+  </PropertyGroup>
-    </PropertyGroup>
+  <ItemGroup>
-
+    <Compile Remove="Models\**\*.cs" />
+    <Compile Remove="Parsing\**\*.cs" />
+    <Compile Remove="Utils\**\*.cs" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\XSDVisualiser.Core\XSDVisualiser.Core.csproj" />
+  </ItemGroup>
 </Project>