Updating ProjectBrowser

Ghost.Editor.Core/Controls/Menu/ContextFlyout.cs

@@ -0,0 +1,95 @@
+using Ghost.Editor.Core.Utilities;
+using Microsoft.UI.Xaml.Controls;
+using System.Reflection;
+using System.Runtime.InteropServices;
+
+
+namespace Ghost.Editor.Core.Controls;
+
+public sealed partial class ContextFlyout : MenuFlyout
+{
+    private bool _isPopulated;
+
+    public string Tag
+    {
+        get; set;
+    } = string.Empty;
+
+    public ContextFlyout()
+    {
+        Opening += ContextFlyout_Opening;
+    }
+
+    private void PopulateContextMenu()
+    {
+        var methods = TypeCache.GetMethodsWithAttribute<ContextMenuItemAttribute>();
+        if (methods == null)
+        {
+            return;
+        }
+
+        var list = new List<(ContextMenuItemAttribute attr, MethodInfo method)>();
+        foreach (var method in methods)
+        {
+            var attributes = method.GetCustomAttributes(typeof(ContextMenuItemAttribute), false);
+            var attribute = (ContextMenuItemAttribute)attributes[0];
+
+            if (!string.Equals(attribute.Tag, Tag, StringComparison.OrdinalIgnoreCase))
+            {
+                continue;
+            }
+
+            list.Add((attribute, method));
+        }
+
+        var span = CollectionsMarshal.AsSpan(list);
+        span.Sort((a, b) =>
+        {
+            var result = a.attr.Group.CompareTo(b.attr.Group);
+            if (result == 0)
+            {
+                result = string.CompareOrdinal(a.attr.Name, b.attr.Name);
+            }
+
+            return result;
+        });
+
+        // itemContainer may be a main thread only collection (for example, ObservableCollection), we run it on the UI thread
+        var i = 0;
+        var group = 0;
+        while (i < list.Count)
+        {
+            var (attr, method) = list[i];
+            if (attr.Group != group)
+            {
+                Items.Add(new MenuFlyoutSeparator());
+                group = attr.Group;
+            }
+
+            // TODO: Group items with / in the name into submenus
+            var menuItem = new MenuFlyoutItem
+            {
+                Text = attr.Name
+            };
+
+            menuItem.Click += (_, _) =>
+            {
+                method.Invoke(null, null);
+            };
+
+            Items.Add(menuItem);
+            i++;
+        }
+    }
+
+    private async void ContextFlyout_Opening(object? sender, object e)
+    {
+        if (_isPopulated)
+        {
+            return;
+        }
+
+        PopulateContextMenu();
+        _isPopulated = true;
+    }
+}