Support pureKotlinSourceFolders for MPP projects

#KT-34271 Fixed
#KT-32963 Fixed

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinGradleProjectResolverExtension.kt

@@ -296,8 +296,14 @@ class KotlinGradleProjectResolverExtension : AbstractProjectResolverExtension()
         val moduleNamePrefix = GradleProjectResolverUtil.getModuleId(resolverCtx, gradleModule)
         resolverCtx.getExtraProject(gradleModule, KotlinGradleModel::class.java)?.let { gradleModel ->
             KotlinGradleFUSLogger.populateGradleUserDir(gradleModel.gradleUserHome)
-            ideModule.pureKotlinSourceFolders =
+            val gradleModelPureKotlinSourceFolders =
                 gradleModel.kotlinTaskProperties.flatMap { it.value.pureKotlinSourceFolders ?: emptyList() }.map { it.absolutePath }
+            ideModule.pureKotlinSourceFolders =
+                if (ideModule.pureKotlinSourceFolders.isEmpty())
+                    gradleModelPureKotlinSourceFolders
+                else
+                    gradleModelPureKotlinSourceFolders + ideModule.pureKotlinSourceFolders
+
             val gradleSourceSets = ideModule.children.filter { it.data is GradleSourceSetData } as Collection<DataNode<GradleSourceSetData>>
             for (gradleSourceSetNode in gradleSourceSets) {
                 val propertiesForSourceSet =

idea/idea-gradle/src/org/jetbrains/kotlin/idea/configuration/KotlinMPPGradleProjectResolver.kt

@@ -544,6 +544,16 @@ open class KotlinMPPGradleProjectResolver : AbstractProjectResolverExtensionComp
                 }
                 ideModule.createChild(ProjectKeys.CONTENT_ROOT, ideContentRoot)
             }
+
+            val mppModelPureKotlinSourceFolders = mppModel.targets.flatMap { it.compilations }
+                .flatMap { it.kotlinTaskProperties.pureKotlinSourceFolders ?: emptyList() }
+                .map { it.absolutePath }
+
+            ideModule.pureKotlinSourceFolders =
+                if (ideModule.pureKotlinSourceFolders.isEmpty())
+                    mppModelPureKotlinSourceFolders
+                else
+                    mppModelPureKotlinSourceFolders + ideModule.pureKotlinSourceFolders
         }
 
         private data class CompilationWithDependencies(