Catrobat.IDE.Core.Formulas.Editor.FormulaEditor.HandleKey C# (CSharp) Method

        public bool HandleKey(FormulaEditorKey key, LocalVariable localVariable = null, GlobalVariable globalVariable = null)
        {
            if (key == FormulaEditorKey.Delete)
            {
                PushUndo();
                return Delete();
            }

            PushUndo();
            var token = CreateToken(key, localVariable, globalVariable);
            return Insert((token is IFormulaFunction)
                ? new[] { token, FormulaTokenFactory.CreateParenthesisToken(true) }
                : new[] { token });
        }