Merge pull request #182 from spreadsheetlab/fix-issue-151

Support user defined functions in parser references

Author: joerivv

src/XLParser.Tests/FormulaAnalysisTest.cs

@@ -1286,6 +1286,22 @@ public void MultiAreaRangeFormula()
             Assert.AreEqual("Sheet1!$A$1", references[0].LocationString);
             Assert.AreEqual("Sheet1!$B$2", references[1].LocationString);
         }
+
+        [TestMethod]
+        public void UserDefinedFunction()
+        {
+            List<ParserReference> references = new FormulaAnalyzer(@"='C:\AddIns\Something.xlam'!fT_Value(A1)").ParserReferences().ToList();
+            Assert.AreEqual(2, references.Count);
+
+            Assert.AreEqual(ReferenceType.UserDefinedFunction, references[0].ReferenceType);
+            Assert.AreEqual(@"C:\AddIns\", references[0].FilePath);
+            Assert.AreEqual("Something.xlam", references[0].FileName);
+            Assert.AreEqual("fT_Value", references[0].Name);
+            Assert.AreEqual(@"'C:\AddIns\Something.xlam'!fT_Value", references[0].LocationString);
+
+            Assert.AreEqual(ReferenceType.Cell, references[1].ReferenceType);
+            Assert.AreEqual("A1", references[1].LocationString);
+        }
         #endregion
 
         #region Depth() and ConditionalComplexity()

src/XLParser/ParserReference.cs

@@ -11,7 +11,8 @@ public enum ReferenceType
         HorizontalRange,
         VerticalRange,
         RefError,
-        Table
+        Table,
+        UserDefinedFunction
     }
 
     public class ParserReference
@@ -102,10 +103,19 @@ public void InitializeReference(ParseTreeNode node)
                 case GrammarNames.RefError:
                     ReferenceType = ReferenceType.RefError;
                     break;
+                case GrammarNames.UDFunctionCall:
+                    ReferenceType = ReferenceType.UserDefinedFunction;
+                    Name = node.ChildNodes[0].ChildNodes[0].Token.ValueString.TrimEnd('(');
+                    break;
             }
 
             ReferenceNode = node;
             LocationString = node.Print();
+
+            if (ReferenceType == ReferenceType.UserDefinedFunction && Name != null)
+            {
+                LocationString = LocationString.Substring(0, LocationString.IndexOf('(', LocationString.LastIndexOf(Name, System.StringComparison.Ordinal)));
+            }
         }
 
         private string UnEscape(string value, string escapeCharacter)