VV editor for EntProtoId? (#4986)

Co-authored-by: wrexbe <[email protected]>

Robust.Client/ViewVariables/ClientViewVariablesManager.cs

@@ -126,8 +126,12 @@ public VVPropEditor PropertyFor(Type? type)
                 return new VVPropEditorString();
             }
 
-            if (type == typeof(EntProtoId) ||
-                type == typeof(EntProtoId?))
+            if (type == typeof(EntProtoId?))
+            {
+                return new VVPropEditorNullableEntProtoId();
+            }
+
+            if (type == typeof(EntProtoId))
             {
                 return new VVPropEditorEntProtoId();
             }

Robust.Client/ViewVariables/Editors/VVPropEditorNullableEntProtoId.cs

@@ -0,0 +1,35 @@
+using Robust.Client.UserInterface;
+using Robust.Client.UserInterface.Controls;
+using Robust.Shared.Prototypes;
+
+namespace Robust.Client.ViewVariables.Editors;
+
+internal sealed class VVPropEditorNullableEntProtoId : VVPropEditor
+{
+    protected override Control MakeUI(object? value)
+    {
+        var lineEdit = new LineEdit
+        {
+            Text = value is EntProtoId protoId ?  protoId.Id : "",
+            Editable = !ReadOnly,
+            HorizontalExpand = true,
+        };
+
+        if (!ReadOnly)
+        {
+            lineEdit.OnTextEntered += e =>
+            {
+                if (string.IsNullOrWhiteSpace(e.Text))
+                {
+                    ValueChanged(null);
+                }
+                else
+                {
+                    ValueChanged((EntProtoId) e.Text);
+                }
+            };
+        }
+
+        return lineEdit;
+    }
+}