From 8dcae507eb91c7914371de03f203307aecc67afc Mon Sep 17 00:00:00 2001
From: Nate Bross <nate@brosstribe.com>
Date: Thu, 14 Aug 2025 22:10:49 -0500
Subject: [PATCH] fix: bind to TextDocument instead if custom binding behavior

---
 DocumentTextBindingBehavior.cs | 64 ----------------------------------
 MainWindow.axaml               | 11 ++----
 ViewModels/ClipViewModel.cs    | 22 +++++++++++-
 3 files changed, 24 insertions(+), 73 deletions(-)
 delete mode 100644 DocumentTextBindingBehavior.cs

diff --git a/DocumentTextBindingBehavior.cs b/DocumentTextBindingBehavior.cs
deleted file mode 100644
index 5464491..0000000
--- a/DocumentTextBindingBehavior.cs
+++ /dev/null
@@ -1,64 +0,0 @@
-using System;
-using Avalonia;
-using Avalonia.Xaml.Interactivity;
-using AvaloniaEdit;
-using AvaloniaEdit.Utils;
-
-namespace SharpFM.Behaviors;
-
-public class DocumentTextBindingBehavior : Behavior<TextEditor>
-{
-    private TextEditor _textEditor = null!;
-
-    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;
-            if (caretOffset <= text.Length)
-            {
-                _textEditor.CaretOffset = caretOffset;
-            }
-        }
-    }
-}
\ No newline at end of file
diff --git a/MainWindow.axaml b/MainWindow.axaml
index c5c4913..5e73f42 100644
--- a/MainWindow.axaml
+++ b/MainWindow.axaml
@@ -3,9 +3,7 @@
     xmlns="https://github.com/avaloniaui"
     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
     xmlns:AvaloniaEdit="clr-namespace:AvaloniaEdit;assembly=AvaloniaEdit"
-    xmlns:behaviors="clr-namespace:SharpFM.Behaviors;assembly=SharpFM"
     xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
-    xmlns:i="clr-namespace:Avalonia.Xaml.Interactivity;assembly=Avalonia.Xaml.Interactivity"
     xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
     xmlns:vm="using:SharpFM.ViewModels"
     Icon="/Assets/noun-sharp-teeth-monster-4226695.small.png"
@@ -169,7 +167,7 @@
                                 Text="Clip Content" />
                         </Border>
 
-                        <!-- AvaloniaEdit component (unchanged) -->
+                        <!-- AvaloniaEdit component with Document binding -->
                         <Border 
                             Grid.Row="1"
                             CornerRadius="0,0,8,8"
@@ -179,11 +177,8 @@
                                 FontFamily="Cascadia Code,Consolas,Menlo,Monospace"
                                 ShowLineNumbers="True"
                                 SyntaxHighlighting="Xml"
-                                WordWrap="False">
-                                <i:Interaction.Behaviors>
-                                    <behaviors:DocumentTextBindingBehavior Text="{Binding SelectedClip.ClipXml, Mode=TwoWay}" />
-                                </i:Interaction.Behaviors>
-                            </AvaloniaEdit:TextEditor>
+                                WordWrap="False"
+                                Document="{Binding SelectedClip.XmlDocument}" />
                         </Border>
                     </Grid>
                 </Border>
diff --git a/ViewModels/ClipViewModel.cs b/ViewModels/ClipViewModel.cs
index 82e5b9e..8aea923 100644
--- a/ViewModels/ClipViewModel.cs
+++ b/ViewModels/ClipViewModel.cs
@@ -1,5 +1,6 @@
 using System.ComponentModel;
 using System.Runtime.CompilerServices;
+using AvaloniaEdit.Document;
 
 namespace SharpFM.ViewModels;
 
@@ -13,6 +14,8 @@ private void NotifyPropertyChanged([CallerMemberName] string propertyName = "")
     }
 
     public FileMakerClip Clip { get; set; }
+    
+    private TextDocument? _xmlDocument;
 
     public ClipViewModel(FileMakerClip clip)
     {
@@ -39,13 +42,30 @@ public string Name
         }
     }
 
+    public TextDocument XmlDocument
+    {
+        get
+        {
+            if (_xmlDocument == null)
+            {
+                _xmlDocument = new TextDocument(Clip.XmlData ?? string.Empty);
+            }
+            return _xmlDocument;
+        }
+    }
+
     public string ClipXml
     {
-        get => Clip.XmlData;
+        get => _xmlDocument?.Text ?? Clip.XmlData;
         set
         {
             Clip.XmlData = value;
+            if (_xmlDocument != null)
+            {
+                _xmlDocument.Text = value ?? string.Empty;
+            }
             NotifyPropertyChanged();
+            NotifyPropertyChanged(nameof(XmlDocument));
         }
     }
 }
\ No newline at end of file