Internal Kotlin packages now should be completable in parent packages

Internal packages which are hard-excluded from completion and
 imports now should be visible there if file package are parent of
 excluded one
 e.g kotlin.jvm.internal.* now visible from kotlin and kotlin.jvm
 #KT-16214 fixed

idea/idea-core/src/org/jetbrains/kotlin/idea/core/KotlinIndicesHelper.kt

@@ -58,7 +58,8 @@ class KotlinIndicesHelper(
         visibilityFilter: (DeclarationDescriptor) -> Boolean,
         private val declarationTranslator: (KtDeclaration) -> KtDeclaration? = { it },
         applyExcludeSettings: Boolean = true,
-        private val filterOutPrivate: Boolean = true
+        private val filterOutPrivate: Boolean = true,
+        private val file: KtFile? = null
 ) {
 
     private val moduleDescriptor = resolutionFacade.moduleDescriptor
@@ -68,7 +69,7 @@ class KotlinIndicesHelper(
     private val descriptorFilter: (DeclarationDescriptor) -> Boolean = filter@ {
         if (it.isHiddenInResolution(resolutionFacade.frontendService<LanguageVersionSettings>())) return@filter false
         if (!visibilityFilter(it)) return@filter false
-        if (applyExcludeSettings && it.isExcludedFromAutoImport(project)) return@filter false
+        if (applyExcludeSettings && it.isExcludedFromAutoImport(project, file)) return@filter false
         true
     }
 

idea/idea-core/src/org/jetbrains/kotlin/idea/core/excludedFromImportsAndCompletion.kt

@@ -20,6 +20,7 @@ import com.intellij.codeInsight.JavaProjectCodeInsightSettings
 import com.intellij.openapi.project.Project
 import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
 import org.jetbrains.kotlin.idea.imports.importableFqName
+import org.jetbrains.kotlin.psi.KtFile
 
 
 private val exclusions =
@@ -30,10 +31,12 @@ private val exclusions =
                 "kotlin.reflect.jvm.internal"
         )
 
-private fun shouldBeHiddenAsInternalImplementationDetail(fqName: String) = exclusions.any { fqName.startsWith(it) }
+private fun shouldBeHiddenAsInternalImplementationDetail(fqName: String, locationFqName: String) =
+        exclusions.any { fqName.startsWith(it) }
+        && (locationFqName.isBlank() || !fqName.startsWith(locationFqName))
 
-fun DeclarationDescriptor.isExcludedFromAutoImport(project: Project): Boolean {
+fun DeclarationDescriptor.isExcludedFromAutoImport(project: Project, inFile: KtFile?): Boolean {
     val fqName = importableFqName?.asString() ?: return false
     return JavaProjectCodeInsightSettings.getSettings(project).isExcluded(fqName) ||
-           shouldBeHiddenAsInternalImplementationDetail(fqName)
+           shouldBeHiddenAsInternalImplementationDetail(fqName, inFile?.packageFqName?.asString() ?: "")
 }