Rewrite EvaluateWidget, add BaseArgumentHandler, use autocomplete for InteractiveEnum

src/UI/Widgets/EvaluateWidget/GenericArgumentHandler.cs

@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using UniverseLib;
+
+namespace UnityExplorer.UI.Widgets
+{
+    public class GenericArgumentHandler : BaseArgumentHandler
+    {
+        private Type genericType;
+
+        public void OnBorrowed(EvaluateWidget evaluator, Type genericConstraint)
+        {
+            this.evaluator = evaluator;
+            this.genericType = genericConstraint;
+
+            typeCompleter.Enabled = true;
+            typeCompleter.BaseType = genericType;
+            typeCompleter.CacheTypes();
+
+            var constraints = genericType.GetGenericParameterConstraints();
+            typeCompleter.GenericConstraints = constraints;
+
+            var sb = new StringBuilder($"<color={SignatureHighlighter.CONST}>{genericType.Name}</color>");
+
+            for (int j = 0; j < constraints.Length; j++)
+            {
+                if (j == 0) sb.Append(' ').Append('(');
+                else sb.Append(',').Append(' ');
+
+                sb.Append(SignatureHighlighter.Parse(constraints[j], false));
+
+                if (j + 1 == constraints.Length)
+                    sb.Append(')');
+            }
+
+            argNameLabel.text = sb.ToString();
+        }
+
+        public void OnReturned()
+        {
+            this.evaluator = null;
+            this.genericType = null;
+
+            this.typeCompleter.Enabled = false;
+
+            this.inputField.Text = "";
+        }
+
+        public Type Evaluate()
+        {
+            return ReflectionUtility.GetTypeByName(this.inputField.Text)
+                    ?? throw new Exception($"Could not find any type by name '{this.inputField.Text}'!");
+        }
+
+        public override void CreateSpecialContent()
+        {
+        }
+    }
+}