KT-12369 Completion: pressing dot after class name should not cause insertion of constructor call

#KT-12369 Fixed

idea/idea-completion/src/org/jetbrains/kotlin/idea/completion/Weighers.kt

@@ -180,6 +180,7 @@ object PreferMatchingItemWeigher : LookupElementWeigher("kotlin.preferMatching",
         keywordExactMatch,
         defaultExactMatch,
         functionExactMatch,
+        specialExactMatch,
         notExactMatch
     }
 
@@ -192,7 +193,16 @@ object PreferMatchingItemWeigher : LookupElementWeigher("kotlin.preferMatching",
             val o = element.`object`
             return when (o) {
                 is KeywordLookupObject -> Weight.keywordExactMatch
-                is DeclarationLookupObject -> if (o.descriptor is FunctionDescriptor) Weight.functionExactMatch else Weight.defaultExactMatch
+
+                is DeclarationLookupObject -> {
+                    val smartCompletionPriority = element.getUserData(SMART_COMPLETION_ITEM_PRIORITY_KEY)
+                    when {
+                        smartCompletionPriority != null && smartCompletionPriority != SmartCompletionItemPriority.DEFAULT -> Weight.specialExactMatch
+                        o.descriptor is FunctionDescriptor -> Weight.functionExactMatch
+                        else -> Weight.defaultExactMatch
+                    }
+                }
+
                 else -> Weight.defaultExactMatch
             }
         }

idea/idea-completion/testData/handlers/basic/PreferClassToConstructor.kt

@@ -0,0 +1,13 @@
+class Color {
+    companion object {
+        val RED = Color()
+    }
+}
+
+fun getColor(): Color? {
+    return Color<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT: *
+// CHAR: '.'

idea/idea-completion/testData/handlers/basic/PreferClassToConstructor.kt.after

@@ -0,0 +1,13 @@
+class Color {
+    companion object {
+        val RED = Color()
+    }
+}
+
+fun getColor(): Color? {
+    return Color.<caret>
+}
+
+// INVOCATION_COUNT: 0
+// ELEMENT: *
+// CHAR: '.'

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

@@ -155,6 +155,12 @@ public class BasicCompletionHandlerTestGenerated extends AbstractBasicCompletion
         doTest(fileName);
     }
 
+    @TestMetadata("PreferClassToConstructor.kt")
+    public void testPreferClassToConstructor() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/basic/PreferClassToConstructor.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("PreferMatchingKeyword.kt")
     public void testPreferMatchingKeyword() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/idea-completion/testData/handlers/basic/PreferMatchingKeyword.kt");