Fix for LT-22315

src/SIL.LCModel/DomainServices/MorphServices.cs

@@ -654,13 +654,29 @@ public static bool IsSuffixishType(LcmCache cache, int hvoMorphType)
 		public static ILexSense GetMainOrFirstSenseOfVariant(ILexEntryRef variantRef)
 		{
 			var mainEntryOrSense = variantRef.ComponentLexemesRS[0] as IVariantComponentLexeme;
-			// find first gloss
-			ILexEntry mainEntry;
-			ILexSense mainOrFirstSense;
-			GetMainEntryAndSenseStack(mainEntryOrSense, out mainEntry, out mainOrFirstSense);
-			return mainOrFirstSense;
-		}
-
+			if (mainEntryOrSense != null)
+			{
+				// find first gloss
+				ILexEntry mainEntry;
+				ILexSense mainOrFirstSense;
+				GetMainEntryAndSenseStack(mainEntryOrSense, out mainEntry, out mainOrFirstSense);
+				return mainOrFirstSense;
+			}
+			else
+			{
+				var componentLexeme = variantRef.ComponentLexemesRS[0];
+				if (componentLexeme != null && componentLexeme is ILexEntry)
+				{
+					ILexEntry entry = (ILexEntry)componentLexeme;
+					if (entry.SensesOS.Count > 0)
+					{
+						return GetMainOrFirstSenseOfVariant(entry.EntryRefsOS[0]);
+					}
+				}
+			}
+			return null;
+		}
+
 		/// <summary>
 		///
 		/// </summary>
@@ -672,7 +688,14 @@ public static void GetMainEntryAndSenseStack(IVariantComponentLexeme mainEntryOr
 			if (mainEntryOrSense is ILexEntry entry)
 			{
 				mainEntry = entry;
-				mainOrFirstSense = mainEntry.SensesOS.Count > 0 ? mainEntry.SensesOS[0] : null;
+				if (entry.SensesOS.Count == 0)
+				{
+					mainOrFirstSense = GetMainOrFirstSenseOfVariant(entry.EntryRefsOS[0]);
+				}
+				else
+				{
+					mainOrFirstSense = mainEntry.SensesOS[0];
+				}
 			}
 			else if (mainEntryOrSense is ILexSense sense)
 			{

tests/SIL.LCModel.Tests/DomainServices/MorphServicesTests.cs

@@ -553,8 +553,55 @@ public void GlossOfNonInflVariantOfSense_SingleType()
 				Assert.That(variantGloss, Is.Not.Null);
 				Assert.That(variantGloss.Text, Is.EqualTo("mainEntrySense2+dial. var. of"));
 			}
-		}
+		}
+
+		/// <summary>
+		/// Get sense/gloss for a variant of a variant (see LT-22315).
+		/// </summary>
+		[Test]
+		public void GlossOfVariantOfVariant()
+		{
+			NonUndoableUnitOfWorkHelper.Do(Cache.ActionHandlerAccessor, () =>
+			{
+				ILexEntry newMainEntry = GetNewMainEntry();
+				newMainEntry.SensesOS.Add(Cache.ServiceLocator.GetInstance<ILexSenseFactory>().Create());
+				newMainEntry.SensesOS[0].Gloss.set_String(Cache.DefaultAnalWs, "gloss");
+
+				ILexEntryType letDialectalVariantType = Cache.ServiceLocator.GetInstance<ILexEntryTypeRepository>().GetObject(LexEntryTypeTags.kguidLexTypDialectalVar);
+				ILexEntryRef newLerDial;
+				SetupLexEntryVariant(Cache, "vaDialVar", newMainEntry, letDialectalVariantType, out newLerDial);
+				AddVariantOf(newLerDial, newMainEntry, letDialectalVariantType);
+
+				// Now create a contraction variant of the dialectal variant
+				ILexEntryType letContractionVariantType = Cache.ServiceLocator.GetInstance<ILexEntryTypeRepository>().GetObject(LexEntryTypeTags.kguidLexTypContraction);
+				ILexEntryRef newLerCont;
+				SetupLexEntryVariant(Cache, "vaContractionVar", newMainEntry, letContractionVariantType, out newLerCont);
+				ILexEntry varEntry = Cache.ServiceLocator.GetInstance<ILexEntryFactory>().Create();
+				AddVariantOf(newLerCont, varEntry, letContractionVariantType);
+			});
+
+			var variant = Cache.ServiceLocator.GetInstance<ILexEntryRepository>().GetHomographs("vaDialVar").FirstOrDefault();
+			var variantRefs = DomainObjectServices.GetVariantRefs(variant);
+			Assert.That(variantRefs.Count(), Is.EqualTo(2));
+			var variant2 = Cache.ServiceLocator.GetInstance<ILexEntryRepository>().GetHomographs("vaContractionVar").FirstOrDefault();
+			var variant2Refs = DomainObjectServices.GetVariantRefs(variant2);
+			Assert.That(variant2Refs.Count(), Is.EqualTo(2));
+			var analWs = Cache.ServiceLocator.WritingSystemManager.Get(Cache.DefaultAnalWs);
+			{
+				IMultiUnicode gloss1;
+				GetMainVariantGloss(variantRefs.ElementAt(0), out gloss1);
 
+				var variantGloss = MorphServices.MakeGlossWithReverseAbbrs(gloss1, analWs, variantRefs.ElementAt(0).VariantEntryTypesRS);
+				Assert.That(variantGloss, Is.Not.Null);
+				Assert.That(variantGloss.Text, Is.EqualTo("gloss+***"));
+
+				GetMainVariantGloss(variant2Refs.ElementAt(0), out gloss1);
+				variantGloss = MorphServices.MakeGlossWithReverseAbbrs(gloss1, analWs, variant2Refs.ElementAt(0).VariantEntryTypesRS);
+				Assert.That(variantGloss, Is.Not.Null);
+				Assert.That(variantGloss.Text, Is.EqualTo("gloss+***"));
+			}
+		}
+
 		/// <summary>
 		/// TODO: If the variant itself has a glosss use it? (Ask Beth Bryson)
 		/// TODO: What do we do if there is no sense, or no gloss? Use lexEntry form instead? (or just put the info on the LexEntry line?)