Add options to detect private / internal API with implicit type

idea/src/org/jetbrains/kotlin/idea/inspections/PublicApiImplicitTypeInspection.kt

@@ -5,15 +5,21 @@
 
 package org.jetbrains.kotlin.idea.inspections
 
+import com.intellij.codeInspection.ui.MultipleCheckboxOptionsPanel
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
+import org.jetbrains.kotlin.descriptors.Visibilities
 import org.jetbrains.kotlin.descriptors.effectiveVisibility
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptorIfAny
 import org.jetbrains.kotlin.psi.KtFunction
 import org.jetbrains.kotlin.psi.KtProperty
 import org.jetbrains.kotlin.psi.psiUtil.containingClassOrObject
+import javax.swing.JComponent
 
-class PublicApiImplicitTypeInspection : AbstractImplicitTypeInspection(
+class PublicApiImplicitTypeInspection(
-    { element, _ ->
+    @JvmField var reportInternal: Boolean = false,
+    @JvmField var reportPrivate: Boolean = false
+) : AbstractImplicitTypeInspection(
+    { element, inspection ->
         element.containingClassOrObject?.isLocal != true &&
                 when (element) {
                     is KtFunction -> !element.isLocal
@@ -21,9 +27,28 @@ class PublicApiImplicitTypeInspection : AbstractImplicitTypeInspection(
                     else -> false
                 } && run {
             val callableMemberDescriptor = element.resolveToDescriptorIfAny() as? CallableMemberDescriptor
-            callableMemberDescriptor?.effectiveVisibility()?.toVisibility()?.isPublicAPI == true
+            val forInternal = (inspection as PublicApiImplicitTypeInspection).reportInternal
+            val forPrivate = inspection.reportPrivate
+
+            val visibility = callableMemberDescriptor?.effectiveVisibility()?.toVisibility()
+            visibility?.isPublicAPI == true || (forInternal && visibility == Visibilities.INTERNAL) ||
+                    (forPrivate && visibility == Visibilities.PRIVATE)
         }
     }
 ) {
-    override val problemText = "For API stability, it's recommended to specify explicitly public & protected declaration types"
+
+    override val problemText: String
+        get() {
+            return if (!reportInternal && !reportPrivate)
+                "For API stability, it's recommended to specify explicitly public & protected declaration types"
+            else
+                "For API stability, it's recommended to specify explicitly declaration types"
+        }
+
+    override fun createOptionsPanel(): JComponent? {
+        val panel = MultipleCheckboxOptionsPanel(this)
+        panel.addCheckbox("Apply also to internal members", "reportInternal")
+        panel.addCheckbox("Apply also to private members", "reportPrivate")
+        return panel
+    }
 }