Implement navigation to type aliases in libraries

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/SourceNavigationHelper.java

@@ -47,10 +47,7 @@ import org.jetbrains.kotlin.descriptors.CallableDescriptor;
 import org.jetbrains.kotlin.descriptors.ModuleDescriptorKt;
 import org.jetbrains.kotlin.descriptors.ModuleParameters;
 import org.jetbrains.kotlin.frontend.di.InjectionKt;
-import org.jetbrains.kotlin.idea.stubindex.KotlinFullClassNameIndex;
-import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope;
-import org.jetbrains.kotlin.idea.stubindex.KotlinTopLevelFunctionFqnNameIndex;
-import org.jetbrains.kotlin.idea.stubindex.KotlinTopLevelPropertyFqnNameIndex;
+import org.jetbrains.kotlin.idea.stubindex.*;
 import org.jetbrains.kotlin.idea.util.ProjectRootsUtil;
 import org.jetbrains.kotlin.lexer.KtTokens;
 import org.jetbrains.kotlin.name.ClassId;
@@ -157,7 +154,7 @@ public class SourceNavigationHelper {
     ) {
         if (declaration instanceof KtPrimaryConstructor) {
             KtClassOrObject sourceClassOrObject =
-                    convertNamedClassOrObject(((KtPrimaryConstructor) declaration).getContainingClassOrObject(), navigationKind);
+                    findClassOrObject(((KtPrimaryConstructor) declaration).getContainingClassOrObject(), navigationKind);
             KtPrimaryConstructor primaryConstructor = sourceClassOrObject != null ? sourceClassOrObject.getPrimaryConstructor() : null;
             return primaryConstructor != null ? primaryConstructor : sourceClassOrObject;
         }
@@ -177,7 +174,7 @@ public class SourceNavigationHelper {
         }
         else if (decompiledContainer instanceof KtClassBody) {
             KtClassOrObject decompiledClassOrObject = (KtClassOrObject) decompiledContainer.getParent();
-            KtClassOrObject sourceClassOrObject = convertNamedClassOrObject(decompiledClassOrObject, navigationKind);
+            KtClassOrObject sourceClassOrObject = findClassOrObject(decompiledClassOrObject, navigationKind);
 
             //noinspection unchecked
             candidates = sourceClassOrObject == null
@@ -224,8 +221,8 @@ public class SourceNavigationHelper {
             //noinspection unchecked
             CallableDescriptor candidateDescriptor = (CallableDescriptor) analyzer.resolveToDescriptor(candidate);
             if (receiversMatch(declaration, candidateDescriptor)
-                    && valueParametersTypesMatch(declaration, candidateDescriptor)
-                    && typeParametersMatch((KtTypeParameterListOwner) declaration, candidateDescriptor.getTypeParameters())) {
+                && valueParametersTypesMatch(declaration, candidateDescriptor)
+                && typeParametersMatch((KtTypeParameterListOwner) declaration, candidateDescriptor.getTypeParameters())) {
                 return candidate;
             }
         }
@@ -271,23 +268,31 @@ public class SourceNavigationHelper {
     }
 
     @Nullable
-    private static KtClassOrObject convertNamedClassOrObject(
-            @NotNull KtClassOrObject classOrObject,
-            @NotNull NavigationKind navigationKind
+    private static <T extends KtNamedDeclaration> T findFirstMatchingInIndex(
+            @NotNull T entity,
+            @NotNull NavigationKind navigationKind,
+            @NotNull StringStubIndexExtension<T> index
     ) {
-        FqName classFqName = classOrObject.getFqName();
+        FqName classFqName = entity.getFqName();
         assert classFqName != null;
 
-        GlobalSearchScope librarySourcesScope = createLibraryOrSourcesScope(classOrObject, navigationKind);
+        GlobalSearchScope librarySourcesScope = createLibraryOrSourcesScope(entity, navigationKind);
         if (librarySourcesScope == GlobalSearchScope.EMPTY_SCOPE) { // .getProject() == null for EMPTY_SCOPE, and this breaks code
             return null;
         }
-        Collection<KtClassOrObject> classes = KotlinFullClassNameIndex.getInstance()
-                .get(classFqName.asString(), classOrObject.getProject(), librarySourcesScope);
+        Collection<T> classes = index.get(classFqName.asString(), entity.getProject(), librarySourcesScope);
         if (classes.isEmpty()) {
             return null;
         }
-        return classes.iterator().next(); // if there are more than one class with this FQ, find first of them
+        return classes.iterator().next(); // if there are more than one with this FQ, find first of them
+    }
+
+    @Nullable
+    private static KtClassOrObject findClassOrObject(
+            @NotNull KtClassOrObject decompiledClassOrObject,
+            @NotNull NavigationKind navigationKind
+    ) {
+        return findFirstMatchingInIndex(decompiledClassOrObject, navigationKind, KotlinFullClassNameIndex.getInstance());
     }
 
     @NotNull
@@ -439,7 +444,8 @@ public class SourceNavigationHelper {
     @NotNull
     public static KtDeclaration navigateToDeclaration(
             @NotNull KtDeclaration from,
-            @NotNull NavigationKind navigationKind) {
+            @NotNull NavigationKind navigationKind
+    ) {
         if (DumbService.isDumb(from.getProject())) return from;
 
         switch (navigationKind) {
@@ -476,12 +482,17 @@ public class SourceNavigationHelper {
 
         @Override
         public KtDeclaration visitObjectDeclaration(@NotNull KtObjectDeclaration declaration, Void data) {
-            return convertNamedClassOrObject(declaration, navigationKind);
+            return findClassOrObject(declaration, navigationKind);
         }
 
         @Override
         public KtDeclaration visitClass(@NotNull KtClass klass, Void data) {
-            return convertNamedClassOrObject(klass, navigationKind);
+            return findClassOrObject(klass, navigationKind);
+        }
+
+        @Override
+        public KtDeclaration visitTypeAlias(@NotNull KtTypeAlias typeAlias, Void data) {
+            return findFirstMatchingInIndex(typeAlias, navigationKind, KotlinTopLevelTypeAliasFqNameIndex.getInstance());
         }
 
         @Override

idea/idea-analysis/src/org/jetbrains/kotlin/idea/decompiler/navigation/findDecompiledDeclaration.kt

@@ -22,10 +22,7 @@ import org.jetbrains.kotlin.builtins.DefaultBuiltIns
 import org.jetbrains.kotlin.descriptors.*
 import org.jetbrains.kotlin.idea.decompiler.KtDecompiledFile
 import org.jetbrains.kotlin.idea.decompiler.textBuilder.DecompiledTextIndexer
-import org.jetbrains.kotlin.idea.stubindex.KotlinFullClassNameIndex
-import org.jetbrains.kotlin.idea.stubindex.KotlinSourceFilterScope
-import org.jetbrains.kotlin.idea.stubindex.KotlinTopLevelFunctionFqnNameIndex
-import org.jetbrains.kotlin.idea.stubindex.KotlinTopLevelPropertyFqnNameIndex
+import org.jetbrains.kotlin.idea.stubindex.*
 import org.jetbrains.kotlin.incremental.components.NoLookupLocation
 import org.jetbrains.kotlin.load.kotlin.JvmBuiltInsSettings
 import org.jetbrains.kotlin.psi.KtCallableDeclaration
@@ -84,20 +81,23 @@ private fun findCandidateDeclarationsInIndex(
     }
 
     val topLevelDeclaration = DescriptorUtils.getParentOfType(referencedDescriptor, PropertyDescriptor::class.java, false)
-                              ?: DescriptorUtils.getParentOfType(referencedDescriptor, FunctionDescriptor::class.java, false) ?: return emptyList()
+                              ?: DescriptorUtils.getParentOfType(referencedDescriptor, FunctionDescriptor::class.java, false)
+                              ?: DescriptorUtils.getParentOfType(referencedDescriptor, TypeAliasDescriptor::class.java, false)
+                              ?: return emptyList()
 
     // filter out synthetic descriptors
     if (!DescriptorUtils.isTopLevelDeclaration(topLevelDeclaration)) return emptyList()
 
     val fqName = topLevelDeclaration.fqNameSafe.asString()
     return when (topLevelDeclaration) {
-        is FunctionDescriptor -> {
-            KotlinTopLevelFunctionFqnNameIndex.getInstance().get(fqName, project, scope)
-        }
-        is PropertyDescriptor -> {
-            KotlinTopLevelPropertyFqnNameIndex.getInstance().get(fqName, project, scope)
-        }
-        else -> error("Referenced non local declaration that is not inside top level function, property of class:\n $referencedDescriptor")
+
+        is FunctionDescriptor -> KotlinTopLevelFunctionFqnNameIndex.getInstance().get(fqName, project, scope)
+
+        is PropertyDescriptor -> KotlinTopLevelPropertyFqnNameIndex.getInstance().get(fqName, project, scope)
+
+        is TypeAliasDescriptor -> KotlinTopLevelTypeAliasFqNameIndex.getInstance().get(fqName, project, scope)
+
+        else -> error("Referenced non local declaration that is not inside top level function, property, class or typealias:\n $referencedDescriptor")
     }
 }
 

idea/testData/decompiler/navigation/library/main.kt

@@ -121,3 +121,5 @@ public fun <T: CharSequence> funWithTypeParam(t: T) {
 
 public fun <T: Number> funWithTypeParam(t: T) {
 }
+
+typealias SimpleClassAlias = SimpleClass

idea/testData/decompiler/navigation/usercode/TypeAlias.decompiled.expected

@@ -0,0 +1,2 @@
+ MainKt.class
+public typealias <1>SimpleClassAlias = testData.libraries.SimpleClass

idea/testData/decompiler/navigation/usercode/TypeAlias.kt

@@ -0,0 +1,4 @@
+import testData.libraries.*
+
+fun foo(c: SimpleClassAlias) {
+}

idea/testData/decompiler/navigation/usercode/TypeAlias.source.expected

@@ -0,0 +1,2 @@
+ main.kt
+typealias <1>SimpleClassAlias = SimpleClass

idea/tests/org/jetbrains/kotlin/idea/decompiler/navigation/NavigateToDecompiledLibraryTestGenerated.java

@@ -113,6 +113,12 @@ public class NavigateToDecompiledLibraryTestGenerated extends AbstractNavigateTo
         doTest(fileName);
     }
 
+    @TestMetadata("TypeAlias.kt")
+    public void testTypeAlias() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeAlias.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("TypeWithSameShortName.kt")
     public void testTypeWithSameShortName() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeWithSameShortName.kt");

idea/tests/org/jetbrains/kotlin/idea/decompiler/navigation/NavigateToLibrarySourceTestGenerated.java

@@ -115,6 +115,12 @@ public class NavigateToLibrarySourceTestGenerated extends AbstractNavigateToLibr
             doTest(fileName);
         }
 
+        @TestMetadata("TypeAlias.kt")
+        public void testTypeAlias() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeAlias.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("TypeWithSameShortName.kt")
         public void testTypeWithSameShortName() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeWithSameShortName.kt");
@@ -208,6 +214,12 @@ public class NavigateToLibrarySourceTestGenerated extends AbstractNavigateToLibr
             doWithJSModuleTest(fileName);
         }
 
+        @TestMetadata("TypeAlias.kt")
+        public void testTypeAlias() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeAlias.kt");
+            doWithJSModuleTest(fileName);
+        }
+
         @TestMetadata("TypeWithSameShortName.kt")
         public void testTypeWithSameShortName() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/decompiler/navigation/usercode/TypeWithSameShortName.kt");