Fixed KT-10602 Incorrect completion for class name

#KT-10602 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/smart/ClassLiteralItems.kt

@@ -20,6 +20,7 @@ import com.intellij.codeInsight.completion.InsertionContext
 import com.intellij.codeInsight.lookup.LookupElement
 import com.intellij.codeInsight.lookup.LookupElementDecorator
 import com.intellij.codeInsight.lookup.LookupElementPresentation
+import com.intellij.psi.PsiDocumentManager
 import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.idea.completion.BasicLookupElementFactory
@@ -30,6 +31,7 @@ import org.jetbrains.kotlin.idea.imports.importableFqName
 import org.jetbrains.kotlin.idea.quickfix.moveCaret
 import org.jetbrains.kotlin.types.KotlinType
 import org.jetbrains.kotlin.types.Variance
+import org.jetbrains.kotlin.types.typeUtil.makeNotNullable
 import java.util.*
 
 object ClassLiteralItems {
@@ -60,19 +62,27 @@ object ClassLiteralItems {
 
         for ((pair, matchedExpectedInfos) in typeAndSuffixToExpectedInfos) {
             val (type, suffix) = pair
-            var lookupElement = lookupElementFactory.createLookupElementForType(type) ?: continue
+            val typeToUse = if (KotlinBuiltIns.isArray(type)) {
-            val text = lookupElement.lookupString + suffix
+                type.makeNotNullable()
-            lookupElement = object : LookupElementDecorator<LookupElement>(lookupElement) {
+            }
-                override fun getLookupString() = text
+            else {
-                override fun getAllLookupStrings() = setOf(lookupString)
+                val classifier = (type.constructor.declarationDescriptor as? ClassDescriptor) ?: continue
+                classifier.defaultType
+            }
 
+            var lookupElement = lookupElementFactory.createLookupElementForType(typeToUse) ?: continue
+
+            lookupElement = object : LookupElementDecorator<LookupElement>(lookupElement) {
                 override fun renderElement(presentation: LookupElementPresentation) {
                     super.renderElement(presentation)
-                    presentation.itemText = text
+                    presentation.itemText += suffix
                 }
 
                 override fun handleInsert(context: InsertionContext) {
                     super.handleInsert(context)
+
+                    PsiDocumentManager.getInstance(context.project).doPostponedOperationsAndUnblockDocument(context.document)
+
                     val offset = context.tailOffset
                     context.document.insertString(offset, suffix)
                     context.editor.moveCaret(offset + suffix.length)

idea/idea-completion/testData/handlers/smart/ArrayClassLiteral.kt

@@ -0,0 +1,7 @@
+fun<T> f(klass: Class<Array<T>>) {
+}
+
+fun g() {
+    f<String>(<caret>)
+}
+// ELEMENT: Array

idea/idea-completion/testData/handlers/smart/ArrayClassLiteral.kt.after

@@ -0,0 +1,7 @@
+fun<T> f(klass: Class<Array<T>>) {
+}
+
+fun g() {
+    f<String>(Array<String>::class.java)<caret>
+}
+// ELEMENT: Array

idea/idea-completion/testData/handlers/smart/ConcreteJavaClass.kt

@@ -2,4 +2,4 @@ open class A<T : Any>(val javaClass: Class<T>?)
 
 class B : A<java.io.File>(<caret>)
 
-// ELEMENT: "File::class.java"
+// ELEMENT: File

idea/idea-completion/testData/handlers/smart/ConcreteJavaClass.kt.after

@@ -4,4 +4,4 @@ open class A<T : Any>(val javaClass: Class<T>?)
 
 class B : A<java.io.File>(File::class.java)<caret>
 
-// ELEMENT: "File::class.java"
+// ELEMENT: File

idea/idea-completion/testData/handlers/smart/ConcreteJavaClass2.kt

@@ -4,5 +4,5 @@ fun bar() {
     foo<String>(<caret>)
 }
 
-// ELEMENT: "String::class.java"
+// ELEMENT: String
 

idea/idea-completion/testData/handlers/smart/ConcreteJavaClass2.kt.after

@@ -4,5 +4,5 @@ fun bar() {
     foo<String>(String::class.java)<caret>
 }
 
-// ELEMENT: "String::class.java"
+// ELEMENT: String
 

idea/idea-completion/testData/handlers/smart/ConcreteKClass.kt

@@ -4,4 +4,4 @@ open class A<T : Any>(val kClass: KClass<T>?)
 
 class B : A<java.io.File>(<caret>)
 
-// ELEMENT: "File::class"
+// ELEMENT: File

idea/idea-completion/testData/handlers/smart/ConcreteKClass.kt.after

@@ -5,4 +5,4 @@ open class A<T : Any>(val kClass: KClass<T>?)
 
 class B : A<java.io.File>(File::class)<caret>
 
-// ELEMENT: "File::class"
+// ELEMENT: File

idea/idea-completion/testData/handlers/smart/kt10602.kt

@@ -0,0 +1,7 @@
+import java.util.concurrent.atomic.*
+
+fun f() {
+    AtomicReferenceFieldUpdater.newUpdater<String, Int>(<caret>)
+}
+
+// ELEMENT: String

idea/idea-completion/testData/handlers/smart/kt10602.kt.after

@@ -0,0 +1,7 @@
+import java.util.concurrent.atomic.*
+
+fun f() {
+    AtomicReferenceFieldUpdater.newUpdater<String, Int>(String::class.java, <caret>)
+}
+
+// ELEMENT: String

idea/idea-completion/testData/smart/callableReference/ConcreteJavaClassExpected.kt

@@ -2,4 +2,4 @@ open class A<T : Any>(val javaClass: Class<T>)
 
 class B : A<String>(<caret>)
 
-// EXIST_JAVA_ONLY: { lookupString: "String::class.java", itemText: "String::class.java", attributes: "" }
+// EXIST_JAVA_ONLY: { lookupString: "String", itemText: "String::class.java", attributes: "" }

idea/idea-completion/testData/smart/callableReference/ConcreteKClassExpected.kt

@@ -4,4 +4,4 @@ open class A<T : Any>(val kClass: KClass<T>)
 
 class B : A<String>(<caret>)
 
-// EXIST: { lookupString: "String::class", itemText: "String::class", attributes: "" }
+// EXIST: { lookupString: "String", itemText: "String::class", attributes: "" }

idea/idea-completion/testData/smart/callableReference/ConcreteKClassExpectedNoDuplicates.kt

@@ -8,7 +8,7 @@ fun f() {
 }
 
 // WITH_ORDER
-// EXIST: { lookupString: "Int::class", itemText: "Int::class", attributes: "" }
+// EXIST: { lookupString: "Int", itemText: "Int::class", attributes: "" }
 // EXIST: { lookupString: "object" }
 // EXIST: null
 // NOTHING_ELSE

idea/idea-completion/tests/org/jetbrains/kotlin/idea/completion/test/handlers/SmartCompletionHandlerTestGenerated.java

@@ -95,6 +95,12 @@ public class SmartCompletionHandlerTestGenerated extends AbstractSmartCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("ArrayClassLiteral.kt")
+    public void testArrayClassLiteral() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/smart/ArrayClassLiteral.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("AutoCompleteAfterAs1.kt")
     public void testAutoCompleteAfterAs1() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/smart/AutoCompleteAfterAs1.kt");
@@ -515,6 +521,12 @@ public class SmartCompletionHandlerTestGenerated extends AbstractSmartCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("kt10602.kt")
+    public void testKt10602() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/smart/kt10602.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("kt6179filterTo.kt")
     public void testKt6179filterTo() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/smart/kt6179filterTo.kt");