Implement wrapping options for enum constants

#KT-14126 Fixed

idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonBlock.kt

@@ -352,6 +352,9 @@ abstract class KotlinCommonBlock(
                 }
             }
 
+            elementType === KtNodeTypes.CLASS_BODY ->
+                return getWrappingStrategyForItemList(commonSettings.ENUM_CONSTANTS_WRAP, KtNodeTypes.ENUM_ENTRY)
+
             elementType === KtNodeTypes.MODIFIER_LIST ->
                 when (node.treeParent.psi) {
                     is KtParameter ->

idea/src/org/jetbrains/kotlin/idea/formatter/KotlinLanguageCodeStyleSettingsProvider.kt

@@ -53,8 +53,7 @@ class KotlinLanguageCodeStyleSettingsProvider : LanguageCodeStyleSettingsProvide
                }
 
                enum class Enumeration {
-                   A,
-                   B
+                   A, B
                }
             """.trimIndent()
 
@@ -242,7 +241,8 @@ class KotlinLanguageCodeStyleSettingsProvider : LanguageCodeStyleSettingsProvide
                         "METHOD_PARAMETERS_LPAREN_ON_NEXT_LINE",
                         "METHOD_PARAMETERS_RPAREN_ON_NEXT_LINE",
                         "CALL_PARAMETERS_LPAREN_ON_NEXT_LINE",
-                        "CALL_PARAMETERS_RPAREN_ON_NEXT_LINE"
+                        "CALL_PARAMETERS_RPAREN_ON_NEXT_LINE",
+                        "ENUM_CONSTANTS_WRAP"
                 )
                 consumer.renameStandardOption(CodeStyleSettingsCustomizable.WRAPPING_SWITCH_STATEMENT, "'when' statements")
                 showCustomOption(KotlinCodeStyleSettings::ALIGN_IN_COLUMNS_CASE_BRANCH,

idea/testData/formatter/EnumWrapping.after.kt

@@ -0,0 +1,8 @@
+enum class A {
+    ENUM_OPTION_A,
+    ENUM_OPTION_B,
+    ENUM_OPTION_C,
+    ENUM_OPTION_D
+}
+
+// SET_INT: ENUM_CONSTANTS_WRAP = 2

idea/testData/formatter/EnumWrapping.kt

@@ -0,0 +1,5 @@
+enum class A {
+    ENUM_OPTION_A, ENUM_OPTION_B, ENUM_OPTION_C, ENUM_OPTION_D
+}
+
+// SET_INT: ENUM_CONSTANTS_WRAP = 2

idea/tests/org/jetbrains/kotlin/formatter/FormatterTestGenerated.java

@@ -320,6 +320,12 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("EnumWrapping.after.kt")
+        public void testEnumWrapping() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/EnumWrapping.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("ExtendsListWrap.after.kt")
         public void testExtendsListWrap() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/ExtendsListWrap.after.kt");