Reformat expression body property accessors

#KT-17394 Fixed

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

@@ -438,6 +438,13 @@ private val INDENT_RULES = arrayOf<NodeIndentStrategy>(
                         Indent.getNormalIndent()
                 },
 
+        strategy("Property accessor expression body")
+                .within(KtNodeTypes.PROPERTY_ACCESSOR)
+                .forElement {
+                    it.psi is KtExpression && it.psi !is KtBlockExpression
+                }
+                .set(Indent.getNormalIndent()),
+
         strategy("Indent for parts")
                 .within(KtNodeTypes.PROPERTY, KtNodeTypes.FUN, KtNodeTypes.DESTRUCTURING_DECLARATION, KtNodeTypes.SECONDARY_CONSTRUCTOR)
                 .notForType(KtNodeTypes.BLOCK, FUN_KEYWORD, VAL_KEYWORD, VAR_KEYWORD, CONSTRUCTOR_KEYWORD)

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

@@ -23,6 +23,7 @@ import com.intellij.formatting.SpacingBuilder
 import com.intellij.formatting.SpacingBuilder.RuleBuilder
 import com.intellij.lang.ASTNode
 import com.intellij.openapi.util.TextRange
+import com.intellij.psi.PsiComment
 import com.intellij.psi.PsiWhiteSpace
 import com.intellij.psi.codeStyle.CodeStyleSettings
 import com.intellij.psi.tree.IElementType
@@ -35,6 +36,7 @@ import org.jetbrains.kotlin.lexer.KtTokens
 import org.jetbrains.kotlin.lexer.KtTokens.*
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.isObjectLiteral
+import org.jetbrains.kotlin.psi.psiUtil.siblings
 import org.jetbrains.kotlin.psi.psiUtil.textRangeWithoutComments
 
 val MODIFIERS_LIST_ENTRIES = TokenSet.orSet(TokenSet.create(ANNOTATION_ENTRY, ANNOTATION), MODIFIER_KEYWORDS)
@@ -140,6 +142,16 @@ fun createSpacingBuilder(settings: CodeStyleSettings, builderUtil: KotlinSpacing
                 }
             }
             inPosition(parent = VALUE_PARAMETER_LIST, right = VALUE_PARAMETER).customRule(parameterWithDocCommentRule)
+
+            inPosition(parent = PROPERTY, right = PROPERTY_ACCESSOR).customRule { parent, _, _ ->
+                val startNode = parent.node.psi.firstChild
+                        .siblings()
+                        .dropWhile { it is PsiComment || it is PsiWhiteSpace }.firstOrNull() ?: parent.node.psi
+                Spacing.createDependentLFSpacing(1, 1,
+                                                 TextRange(startNode.textRange.startOffset, parent.textRange.endOffset),
+                                                 false, 0)
+            }
+
         }
 
         simple {
@@ -195,7 +207,6 @@ fun createSpacingBuilder(settings: CodeStyleSettings, builderUtil: KotlinSpacing
 
             after(VAL_KEYWORD).spaces(1)
             after(VAR_KEYWORD).spaces(1)
-            beforeInside(PROPERTY_ACCESSOR, PROPERTY).spacing(1, 0, 0, true, 0)
             betweenInside(TYPE_PARAMETER_LIST, IDENTIFIER, PROPERTY).spaces(1)
             betweenInside(TYPE_REFERENCE, DOT, PROPERTY).spacing(0, 0, 0, false, 0)
             betweenInside(DOT, IDENTIFIER, PROPERTY).spacing(0, 0, 0, false, 0)

idea/testData/formatter/PropertyAccessorLineBreak.after.kt

@@ -0,0 +1,13 @@
+class A {
+    override val location: Location
+        get() =
+            if (team != null)
+                team.location(organization)
+            else
+                organization.location().teams
+
+    val name get() = "a"
+
+    /** The age. */
+    val age get() = 1
+}

idea/testData/formatter/PropertyAccessorLineBreak.kt

@@ -0,0 +1,12 @@
+class A {
+    override val location: Location get() =
+    if (team != null)
+        team.location(organization)
+    else
+        organization.location().teams
+
+    val name get() = "a"
+
+    /** The age. */
+    val age get() = 1
+}

idea/testData/intentions/convertFunctionToProperty/addExplicitAnonymousType.kt.after

@@ -3,11 +3,12 @@ interface T {
 }
 
 class A(val n: Int) {
-    val foo get() = object : T {
-        override fun bar() {
+    val foo
+        get() = object : T {
+            override fun bar() {
 
+            }
         }
-    }
 }
 
 fun test() {

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

@@ -596,6 +596,12 @@ public class FormatterTestGenerated extends AbstractFormatterTest {
             doTest(fileName);
         }
 
+        @TestMetadata("PropertyAccessorLineBreak.after.kt")
+        public void testPropertyAccessorLineBreak() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/PropertyAccessorLineBreak.after.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("PropertyAccessors.after.kt")
         public void testPropertyAccessors() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/formatter/PropertyAccessors.after.kt");