TypeAccessibilityChecker: rename existingFqNames to existingTypeNames and add comments

idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/TypeAccessibilityChecker.kt

@@ -16,7 +16,14 @@ import org.jetbrains.kotlin.types.KotlinType
 interface TypeAccessibilityChecker {
     val project: Project
     val targetModule: Module
-    var existingFqNames: Collection<String>
+
+    /***
+     * Contains additional [FqName] as [String], which aren't available in the module at the time of verification.
+     *
+     * For example, you want to move `open class A<T : A>` class to another module.
+     * In this case, you should add [FqName] of class `A` in [existingTypeNames].
+     */
+    var existingTypeNames: Collection<String>
 
     fun incorrectTypes(declaration: KtNamedDeclaration): Collection<FqName?>
     fun incorrectTypes(descriptor: DeclarationDescriptor): Collection<FqName?>

idea/idea-analysis/src/org/jetbrains/kotlin/idea/quickfix/TypeAccessibilityCheckerImpl.kt

@@ -28,7 +28,7 @@ import org.jetbrains.kotlin.utils.addToStdlib.safeAs
 class TypeAccessibilityCheckerImpl(
     override val project: Project,
     override val targetModule: Module,
-    override var existingFqNames: Collection<String> = emptyList()
+    override var existingTypeNames: Collection<String> = emptyList()
 ) : TypeAccessibilityChecker {
     private val scope by lazy { GlobalSearchScope.moduleWithDependenciesAndLibrariesScope(targetModule, targetModule.isTestModule) }
     private var builtInsModule: ModuleDescriptor? = targetModule.toDescriptor()
@@ -54,9 +54,9 @@ class TypeAccessibilityCheckerImpl(
     override fun checkAccessibility(type: KotlinType): Boolean = incorrectTypesInSequence(type.collectAllTypes(), true).isEmpty()
 
     override fun <R> runInContext(fqNames: Collection<String>, block: TypeAccessibilityChecker.() -> R): R {
-        val oldValue = existingFqNames
-        existingFqNames = fqNames
-        return block().also { existingFqNames = oldValue }
+        val oldValue = existingTypeNames
+        existingTypeNames = fqNames
+        return block().also { existingTypeNames = oldValue }
     }
 
     private fun incorrectTypesInSequence(
@@ -70,13 +70,13 @@ class TypeAccessibilityCheckerImpl(
     }
 
     private fun incorrectTypesInDescriptor(descriptor: DeclarationDescriptor, lazy: Boolean) =
-        runInContext(descriptor.additionalClasses(existingFqNames)) {
+        runInContext(descriptor.additionalClasses(existingTypeNames)) {
             incorrectTypesInSequence(descriptor.collectAllTypes(), lazy)
         }
 
     private fun FqName?.canFindClassInModule(): Boolean {
         val name = this?.asString() ?: return false
-        return name in existingFqNames
+        return name in existingTypeNames
                 || KotlinFullClassNameIndex.getInstance()[name, project, scope].isNotEmpty()
                 || builtInsModule?.resolveClassByFqName(this, NoLookupLocation.FROM_BUILTINS) != null
     }

idea/src/org/jetbrains/kotlin/idea/quickfix/expectactual/CreateExpectedFix.kt

@@ -168,7 +168,7 @@ private fun TypeAccessibilityChecker.findAndApplyExistingClasses(elements: Colle
     var classes = elements.filterIsInstance<KtClassOrObject>()
     while (true) {
         val existingNames = classes.mapNotNull { it.fqName?.asString() }.toHashSet()
-        existingFqNames = existingNames
+        existingTypeNames = existingNames
 
         val newExistingClasses = classes.filter { isCorrectAndHaveNonPrivate(it) }
         if (classes.size == newExistingClasses.size) return existingNames
@@ -305,7 +305,7 @@ class CreateExpectedCallableMemberFix(
         return@block null
     }
     val descriptor = element.toDescriptor() as? CallableMemberDescriptor
-    checker.existingFqNames = targetExpectedClass?.getSuperNames()?.toSet().orEmpty()
+    checker.existingTypeNames = targetExpectedClass?.getSuperNames()?.toSet().orEmpty()
     descriptor?.let {
         generateCallable(
             project,

idea/src/org/jetbrains/kotlin/idea/quickfix/expectactual/ExpectActualUtils.kt

@@ -140,7 +140,7 @@ internal fun KtPsiFactory.generateClassOrObject(
         }
     }
 
-    val existingFqNamesWithSuperTypes = (checker.existingFqNames + superNames).toSet()
+    val existingFqNamesWithSuperTypes = (checker.existingTypeNames + superNames).toSet()
     declLoop@ for (originalDeclaration in originalClass.declarations) {
         val descriptor = originalDeclaration.toDescriptor() ?: continue
         if (generateExpectClass && !originalDeclaration.isEffectivelyActual(false)) continue
@@ -292,7 +292,7 @@ private fun KtCallableDeclaration.repairOverride(descriptor: CallableDescriptor,
     if (!hasModifier(KtTokens.OVERRIDE_KEYWORD)) return
 
     val superDescriptor = descriptor.overriddenDescriptors.firstOrNull()?.containingDeclaration
-    if (superDescriptor?.fqNameOrNull()?.shortName()?.asString() !in checker.existingFqNames) {
+    if (superDescriptor?.fqNameOrNull()?.shortName()?.asString() !in checker.existingTypeNames) {
         removeModifier(KtTokens.OVERRIDE_KEYWORD)
     }
 }