WIP

Needlework.Net.Desktop/Views/WebsocketView.axaml.cs

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+using Avalonia;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Styling;
+using AvaloniaEdit;
+using AvaloniaEdit.TextMate;
+using CommunityToolkit.Mvvm.Messaging;
+using Needlework.Net.Desktop.Extensions;
+using Needlework.Net.Desktop.Messages;
+using Needlework.Net.Desktop.ViewModels;
+using SukiUI;
+using TextMateSharp.Grammars;
+
+namespace Needlework.Net.Desktop.Views;
+
+public partial class WebsocketView : UserControl, IRecipient<ResponseUpdatedMessage>
+{
+    private TextEditor? _responseEditor;
+
+    public WebsocketView()
+    {
+        InitializeComponent();
+    }
+
+    public void Receive(ResponseUpdatedMessage message)
+    {
+        _responseEditor!.Text = message.Value;
+    }
+
+    protected override void OnApplyTemplate(TemplateAppliedEventArgs e)
+    {
+        base.OnApplyTemplate(e);
+
+        var vm = (WebsocketViewModel)DataContext!;
+        var viewer = this.FindControl<ListBox>("EventViewer");
+        viewer!.PropertyChanged += (s, e) => { if (vm.IsTail) viewer.ScrollIntoView(vm.EventLog.Count - 1); };
+
+        _responseEditor = this.FindControl<TextEditor>("ResponseEditor");
+        _responseEditor?.ApplyJsonEditorSettings();
+
+        WeakReferenceMessenger.Default.Register(this, nameof(WebsocketViewModel));
+
+        OnBaseThemeChanged(Application.Current!.ActualThemeVariant);
+        SukiTheme.GetInstance().OnBaseThemeChanged += OnBaseThemeChanged;
+    }
+
+    private void OnBaseThemeChanged(ThemeVariant currentTheme)
+    {
+
+        var registryOptions = new RegistryOptions(
+            currentTheme == ThemeVariant.Dark ? ThemeName.DarkPlus : ThemeName.LightPlus);
+
+        var responseTmi = _responseEditor.InstallTextMate(registryOptions);
+        responseTmi.SetGrammar(registryOptions.GetScopeByLanguageId(registryOptions
+            .GetLanguageByExtension(".json").Id));
+    }
+}