Remove explicit type intention should not be available on public

idea/src/org/jetbrains/kotlin/idea/intentions/ConvertToExpressionBodyIntention.kt

@@ -75,16 +75,13 @@ public class ConvertToExpressionBodyIntention : JetSelfTargetingOffsetIndependen
                 editor.getCaretModel().moveToOffset(range.getEndOffset())
             }
             else {
-                (declaration : PsiElement).deleteChildRange(colon, typeRef)
+                (declaration as PsiElement).deleteChildRange(colon, typeRef)
             }
         }
     }
 
     private fun canOmitType(declaration: JetCallableDeclaration, expression: JetExpression): Boolean {
-        if (declaration.getModifierList()?.hasModifier(JetTokens.OVERRIDE_KEYWORD) ?: false) return true
+        if (!declaration.canRemoveTypeSpecificationByVisibility()) return false
-
-        val descriptor = declaration.resolveToDescriptor()
-        if ((descriptor as? DeclarationDescriptorWithVisibility)?.getVisibility()?.isPublicAPI() ?: false) return false
 
         // Workaround for anonymous objects and similar expressions without resolution scope
         // TODO: This should probably be fixed in front-end so that resolution scope is recorded for anonymous objects as well
@@ -92,7 +89,7 @@ public class ConvertToExpressionBodyIntention : JetSelfTargetingOffsetIndependen
                                  ?.getStatements()?.singleOrNull() as? JetExpression
                          ?: return false
 
-        val declaredType = (descriptor as? CallableDescriptor)?.getReturnType() ?: return false
+        val declaredType = (declaration.resolveToDescriptor() as? CallableDescriptor)?.getReturnType() ?: return false
         val scope = scopeExpression.analyze()[BindingContext.RESOLUTION_SCOPE, scopeExpression] ?: return false
         val expressionType = expression.analyzeInContext(scope).getType(expression) ?: return false
         return expressionType.isSubtypeOf(declaredType)

idea/src/org/jetbrains/kotlin/idea/intentions/RemoveExplicitTypeIntention.kt

@@ -39,16 +39,17 @@ import java.util.*
 
 public class RemoveExplicitTypeIntention : JetSelfTargetingIntention<JetCallableDeclaration>(javaClass(), "Remove explicit type specification") {
     override fun isApplicableTo(element: JetCallableDeclaration, caretOffset: Int): Boolean {
-        //TODO: check for public API
         if (element.getContainingFile() is JetCodeFragment) return false
         if (element.getTypeReference() == null) return false
 
         val initializer = (element as? JetWithExpressionInitializer)?.getInitializer()
         if (initializer != null && initializer.getTextRange().containsOffset(caretOffset)) return false
 
+        if (!element.canRemoveTypeSpecificationByVisibility()) return false
+
         return when (element) {
-            is JetProperty -> true
+            is JetProperty -> initializer != null
-            is JetNamedFunction -> !element.hasBlockBody() && element.getBodyExpression() != null
+            is JetNamedFunction -> !element.hasBlockBody() && initializer != null
             is JetParameter -> element.isLoopParameter()
             else -> false
         }

idea/src/org/jetbrains/kotlin/idea/intentions/Utils.kt

@@ -18,15 +18,20 @@ package org.jetbrains.kotlin.idea.intentions
 
 import com.intellij.openapi.util.TextRange
 import org.jetbrains.kotlin.JetNodeTypes
-import org.jetbrains.kotlin.descriptors.FunctionDescriptor
+import org.jetbrains.kotlin.analyzer.analyzeInContext
+import org.jetbrains.kotlin.descriptors.CallableDescriptor
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptorWithVisibility
 import org.jetbrains.kotlin.descriptors.ValueParameterDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptor
 import org.jetbrains.kotlin.idea.references.JetReference
 import org.jetbrains.kotlin.idea.util.IdeDescriptorRenderers
 import org.jetbrains.kotlin.idea.util.ShortenReferences
+import org.jetbrains.kotlin.lexer.JetTokens
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.types.JetType
+import org.jetbrains.kotlin.types.typeUtil.isSubtypeOf
 
 fun JetCallableDeclaration.setType(type: JetType) {
     if (type.isError()) return
@@ -59,3 +64,10 @@ fun isAutoCreatedItUsage(expression: JetSimpleNameExpression): Boolean {
     val target = reference?.resolveToDescriptors(context)?.singleOrNull() as? ValueParameterDescriptor? ?: return false
     return context[BindingContext.AUTO_CREATED_IT, target]
 }
+
+fun JetCallableDeclaration.canRemoveTypeSpecificationByVisibility(): Boolean {
+    val descriptor = resolveToDescriptor()
+    val isOverride = getModifierList()?.hasModifier(JetTokens.OVERRIDE_KEYWORD) ?: false
+    if (!isOverride && (descriptor as? DeclarationDescriptorWithVisibility)?.getVisibility()?.isPublicAPI() ?: false) return false
+    return true
+}

idea/testData/intentions/removeExplicitType/notOnPublic.kt

@@ -0,0 +1,2 @@
+// IS_APPLICABLE: false
+public var x: String? = null

idea/testData/intentions/removeExplicitType/onOverride.kt

@@ -0,0 +1,7 @@
+public trait I {
+    public fun foo(): String
+}
+
+public class C : I {
+    override fun foo(): <caret>String = ""
+}

idea/testData/intentions/removeExplicitType/onOverride.kt.after

@@ -0,0 +1,7 @@
+public trait I {
+    public fun foo(): String
+}
+
+public class C : I {
+    override fun foo() = ""
+}

idea/testData/intentions/removeExplicitType/onOverrideInTrait.kt

@@ -0,0 +1,8 @@
+// IS_APPLICABLE: false
+public trait I {
+    public val v: String?
+}
+
+public trait I1 : I {
+    override val v: String<caret>
+}

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -5050,6 +5050,24 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             JetTestUtils.assertAllTestsPresentByMetadata(this.getClass(), new File("idea/testData/intentions/removeExplicitType"), Pattern.compile("^(.+)\\.kt$"), true);
         }
 
+        @TestMetadata("notOnPublic.kt")
+        public void testNotOnPublic() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/removeExplicitType/notOnPublic.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("onOverride.kt")
+        public void testOnOverride() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/removeExplicitType/onOverride.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("onOverrideInTrait.kt")
+        public void testOnOverrideInTrait() throws Exception {
+            String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/removeExplicitType/onOverrideInTrait.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("onType.kt")
         public void testOnType() throws Exception {
             String fileName = JetTestUtils.navigationMetadata("idea/testData/intentions/removeExplicitType/onType.kt");