Edited a bit.

Author: JLChnToZ

Assets/Script Tester/Editor/Helpers.cs

@@ -275,28 +275,41 @@ static int MaskedEnumFieldPostProcess(int[] itemValues, int val, int maskVal, in
 		}
 
 		internal static string StringField(string label, string value, bool readOnly, params GUILayoutOption[] options) {
-			int lines = CountLines(value);
-			if(lines > 1) {
-				var _opts = options.ToList();
-				_opts.Add(GUILayout.Height(EditorGUIUtility.singleLineHeight * lines));
-				_opts.Add(GUILayout.MaxWidth(EditorGUIUtility.currentViewWidth));
-				EditorGUILayout.BeginVertical();
-				EditorGUILayout.PrefixLabel(label);
-				if(readOnly)
-					EditorGUILayout.SelectableLabel(value, EditorStyles.textArea, _opts.ToArray());
-				else
-					value = EditorGUILayout.TextArea(value, _opts.ToArray());
-				EditorGUILayout.EndVertical();
+			int length = value == null ? 0 : value.Length;
+			if(length > 5000) {
+				EditorGUILayout.BeginHorizontal();
+				EditorGUILayout.LabelField(label, "Text too long to display (" + length + " characters)");
+				if(GUILayout.Button("Copy", GUILayout.ExpandWidth(false))) 
+					EditorGUIUtility.systemCopyBuffer = value;
+				if(!readOnly && GUILayout.Button("Paste", GUILayout.ExpandWidth(false))) {
+					value = EditorGUIUtility.systemCopyBuffer;
+					GUI.changed = true;
+				}
+				EditorGUILayout.EndHorizontal();
 			} else {
-				if(readOnly) {
+				int lines = CountLines(value);
+				if(lines > 1) {
 					var _opts = options.ToList();
-					_opts.Add(GUILayout.Height(EditorGUIUtility.singleLineHeight));
-					EditorGUILayout.BeginHorizontal();
+					_opts.Add(GUILayout.Height(EditorGUIUtility.singleLineHeight * lines));
+					_opts.Add(GUILayout.MaxWidth(EditorGUIUtility.currentViewWidth));
+					EditorGUILayout.BeginVertical();
 					EditorGUILayout.PrefixLabel(label);
-					EditorGUILayout.SelectableLabel(value, EditorStyles.textField, _opts.ToArray());
-					EditorGUILayout.EndHorizontal();
-				} else
-					value = EditorGUILayout.TextField(label, value, options);
+					if(readOnly)
+						EditorGUILayout.SelectableLabel(value, EditorStyles.textArea, _opts.ToArray());
+					else
+						value = EditorGUILayout.TextArea(value, _opts.ToArray());
+					EditorGUILayout.EndVertical();
+				} else {
+					if(readOnly) {
+						var _opts = options.ToList();
+						_opts.Add(GUILayout.Height(EditorGUIUtility.singleLineHeight));
+						EditorGUILayout.BeginHorizontal();
+						EditorGUILayout.PrefixLabel(label);
+						EditorGUILayout.SelectableLabel(value, EditorStyles.textField, _opts.ToArray());
+						EditorGUILayout.EndHorizontal();
+					} else
+						value = EditorGUILayout.TextField(label, value, options);
+				}
 			}
 			return value;
 		}

Assets/Script Tester/Editor/InspectorDrawer.cs

@@ -91,11 +91,14 @@ public void Draw(bool drawHeader = true, bool readOnly = false) {
 						if(!Helper.AssignValue(item.Info, target, item.Value)) {
 							object value;
 							var propDrawer = item as MethodPropertyDrawer;
-							if(propDrawer != null && Helper.FetchValue(propDrawer.Info, target, out value)) {
-								propDrawer.Value = value;
-								propDrawer.GetException = null;
-							} else
-								propDrawer.GetException = value as Exception;
+							if(propDrawer != null) {
+								var success = Helper.FetchValue(propDrawer.Info, target, out value);
+								if(success) {
+									propDrawer.Value = value;
+									propDrawer.GetException = null;
+								} else
+									propDrawer.GetException = value as Exception;
+							}
 						}
 					}
 				}

Assets/Script Tester/Editor/InspectorPlus.cs

@@ -32,7 +32,7 @@ void OnFocus() {
 
 		void OnGUI() {
 			GUILayout.BeginHorizontal(EditorStyles.toolbar);
-			if(GUILayout.Button("Menu", EditorStyles.toolbarDropDown, GUILayout.ExpandWidth(false)))
+			if(GUILayout.Button("Menu", EditorStyles.toolbarButton, GUILayout.ExpandWidth(false)))
 				ShowMenu();
 			if(Event.current.type == EventType.Repaint)
 				toolbarMenuPos = GUILayoutUtility.GetLastRect();

Assets/Script Tester/Editor/MethodPropertyDrawer.cs

@@ -288,10 +288,10 @@ public void Draw(bool readOnly, Rect? rect = null) {
 			}
 			if(!readOnly && referenceModeBtn) {
 				if(rect.HasValue) {
-					if(GUI.Button(Helper.ScaleRect(rect.Value, 1, 0.5F, 0, 0, -EditorGUIUtility.singleLineHeight, -7.5F, 15, 15), "...", EditorStyles.miniButton))
+					if(GUI.Button(Helper.ScaleRect(rect.Value, 1, 0.5F, 0, 0, -EditorGUIUtility.singleLineHeight, -7.5F, 15, 15), GUIContent.none, Helper.GetGUIStyle("MiniPullDown")))
 						ShowMenu(rect.Value);
 				} else {
-					if(GUILayout.Button("...", EditorStyles.miniButton, GUILayout.Width(EditorGUIUtility.singleLineHeight)))
+					if(GUILayout.Button(GUIContent.none, Helper.GetGUIStyle("MiniPullDown"), GUILayout.Width(EditorGUIUtility.singleLineHeight)))
 						ShowMenu(menuButtonRect);
 					if(Event.current.type == EventType.Repaint)
 						menuButtonRect = GUILayoutUtility.GetLastRect();