Convert Object Literal to Lambda Intention: Move lambda out of parentheses when possible. Fix after-template

#KT-10778 Fixed

idea/resources/intentionDescriptions/ObjectLiteralToLambdaIntention/after.kt.template

@@ -1 +1 @@
-SwingUtilities { println("a") }
+SwingUtilities.invokeLater { println("a") }

idea/src/org/jetbrains/kotlin/idea/inspections/RedundantSamConstructorInspection.kt

@@ -106,10 +106,10 @@ class RedundantSamConstructorInspection : AbstractKotlinInspection() {
     }
 
     companion  object {
-        fun replaceSamConstructorCall(callExpression: KtCallExpression): KtExpression {
+        fun replaceSamConstructorCall(callExpression: KtCallExpression): KtLambdaExpression {
             val functionalArgument = callExpression.samConstructorValueArgument()?.getArgumentExpression()
                                      ?: throw AssertionError("SAM-constructor should have a FunctionLiteralExpression as single argument: ${callExpression.getElementTextWithContext()}")
-            return callExpression.getQualifiedExpressionForSelectorOrThis().replace(functionalArgument) as KtExpression
+            return callExpression.getQualifiedExpressionForSelectorOrThis().replace(functionalArgument) as KtLambdaExpression
         }
 
         private fun canBeReplaced(parentCall: KtCallExpression, samConstructorArguments: List<KtValueArgument>): Boolean {

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

@@ -21,39 +21,50 @@ import org.jetbrains.kotlin.builtins.KotlinBuiltIns
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
 import org.jetbrains.kotlin.idea.core.moveFunctionLiteralOutsideParentheses
-import org.jetbrains.kotlin.psi.KtCallExpression
-import org.jetbrains.kotlin.psi.KtNameReferenceExpression
+import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.psi.psiUtil.containsInside
+import org.jetbrains.kotlin.psi.psiUtil.getStrictParentOfType
 import org.jetbrains.kotlin.psi.psiUtil.startOffset
-import org.jetbrains.kotlin.psi.unpackFunctionLiteral
 import org.jetbrains.kotlin.resolve.BindingContext
 import org.jetbrains.kotlin.resolve.lazy.BodyResolveMode
 
 class MoveLambdaOutsideParenthesesIntention : SelfTargetingIntention<KtCallExpression>(KtCallExpression::class.java, "Move lambda argument out of parentheses") {
-    override fun isApplicableTo(element: KtCallExpression, caretOffset: Int): Boolean {
-        if (element.lambdaArguments.isNotEmpty()) return false
-        val argument = element.valueArguments.lastOrNull() ?: return false
-        val expression = argument.getArgumentExpression() ?: return false
-        val functionLiteral = expression.unpackFunctionLiteral() ?: return false
-
-        val callee = element.calleeExpression
-        if (callee is KtNameReferenceExpression) {
-            val bindingContext = element.analyze(BodyResolveMode.PARTIAL)
-            val targets = bindingContext[BindingContext.REFERENCE_TARGET, callee]?.let { listOf(it) }
-                          ?: bindingContext[BindingContext.AMBIGUOUS_REFERENCE_TARGET, callee]
-                          ?: listOf()
-            val candidates = targets.filterIsInstance<FunctionDescriptor>()
-            // if there are functions among candidates but none of them have last function parameter then not show the intention
-            if (candidates.isNotEmpty() && candidates.none {
-                val lastParameter = it.valueParameters.lastOrNull()
-                lastParameter != null && KotlinBuiltIns.isExactFunctionOrExtensionFunctionType(lastParameter.type)
-            }) {
-                return false
-            }
+    companion object {
+        private fun getLambdaExpression(callExpression: KtCallExpression): KtLambdaExpression? {
+            if (callExpression.lambdaArguments.isNotEmpty()) return null
+            return callExpression.valueArguments.lastOrNull()?.getArgumentExpression()?.unpackFunctionLiteral()
         }
 
-        if (caretOffset < argument.asElement().startOffset) return false
-        val bodyRange = functionLiteral.bodyExpression?.textRange ?: return true
+        fun canMove(element: KtCallExpression): Boolean {
+            if (getLambdaExpression(element) == null) return false
+
+            val callee = element.calleeExpression
+            if (callee is KtNameReferenceExpression) {
+                val bindingContext = element.analyze(BodyResolveMode.PARTIAL)
+                val targets = bindingContext[BindingContext.REFERENCE_TARGET, callee]?.let { listOf(it) }
+                              ?: bindingContext[BindingContext.AMBIGUOUS_REFERENCE_TARGET, callee]
+                              ?: listOf()
+                val candidates = targets.filterIsInstance<FunctionDescriptor>()
+                // if there are functions among candidates but none of them have last function parameter then not show the intention
+                if (candidates.isNotEmpty() && candidates.none {
+                    val lastParameter = it.valueParameters.lastOrNull()
+                    lastParameter != null && KotlinBuiltIns.isExactFunctionOrExtensionFunctionType(lastParameter.type)
+                }) {
+                    return false
+                }
+            }
+
+            return true
+        }
+    }
+
+    override fun isApplicableTo(element: KtCallExpression, caretOffset: Int): Boolean {
+        if (!canMove(element)) return false
+
+        val lambdaExpression = getLambdaExpression(element) ?: return false
+        val argument = lambdaExpression.getStrictParentOfType<KtValueArgument>() ?: return false
+        if (caretOffset < argument.startOffset) return false
+        val bodyRange = lambdaExpression.bodyExpression?.textRange ?: return true
         return !bodyRange.containsInside(caretOffset)
     }
 

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

@@ -24,6 +24,7 @@ import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.Modality
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
 import org.jetbrains.kotlin.idea.caches.resolve.resolveToDescriptor
+import org.jetbrains.kotlin.idea.core.moveFunctionLiteralOutsideParentheses
 import org.jetbrains.kotlin.idea.core.replaced
 import org.jetbrains.kotlin.idea.inspections.IntentionBasedInspection
 import org.jetbrains.kotlin.idea.inspections.RedundantSamConstructorInspection
@@ -135,6 +136,9 @@ class ObjectLiteralToLambdaIntention : SelfTargetingRangeIntention<KtObjectLiter
                                  ?.parent as? KtCallExpression
         if (parentCall != null && RedundantSamConstructorInspection.samConstructorCallsToBeConverted(parentCall).singleOrNull() == callExpression) {
             RedundantSamConstructorInspection.replaceSamConstructorCall(callExpression)
+            if (MoveLambdaOutsideParenthesesIntention.canMove(parentCall)) {
+                parentCall.moveFunctionLiteralOutsideParentheses()
+            }
         }
         else {
             ShortenReferences.DEFAULT.process(replaced.getContainingKtFile(), replaced.startOffset, callee.endOffset)

idea/testData/intentions/objectLiteralToLambda/NoSamAdapterNeeded.kt.after

@@ -3,5 +3,5 @@
 import javax.swing.SwingUtilities
 
 fun bar() {
-    SwingUtilities.invokeLater({ throw UnsupportedOperationException() })
+    SwingUtilities.invokeLater { throw UnsupportedOperationException() }
 }

idea/testData/multiFileIntentions/objectLiteralToLambda/after/source/J.java

@@ -0,0 +1,7 @@
+package source;
+
+public class J {
+    static void foo(Runnable r, int n) {
+
+    }
+}

idea/testData/multiFileIntentions/objectLiteralToLambda/after/source/test.kt

@@ -0,0 +1,5 @@
+package source
+
+fun bar() {
+    J.foo({ println("a") }, 1)
+}

idea/testData/multiFileIntentions/objectLiteralToLambda/before/source/J.java

@@ -0,0 +1,7 @@
+package source;
+
+public class J {
+    static void foo(Runnable r, int n) {
+
+    }
+}

idea/testData/multiFileIntentions/objectLiteralToLambda/before/source/test.kt

@@ -0,0 +1,9 @@
+package source
+
+fun bar() {
+    J.foo(<caret>object : Runnable {
+        override fun run() {
+            println("a")
+        }
+    }, 1)
+}

idea/testData/multiFileIntentions/objectLiteralToLambda/objectLiteralToLambda.test

@@ -0,0 +1,6 @@
+{
+  "mainFile": "source/test.kt",
+  "intentionClass": "org.jetbrains.kotlin.idea.intentions.ObjectLiteralToLambdaIntention",
+  "intentionText": "Convert to lambda",
+  "withRuntime": "true"
+}

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

@@ -95,6 +95,12 @@ public class MultiFileIntentionTestGenerated extends AbstractMultiFileIntentionT
         doTest(fileName);
     }
 
+    @TestMetadata("objectLiteralToLambda/objectLiteralToLambda.test")
+    public void testObjectLiteralToLambda_ObjectLiteralToLambda() throws Exception {
+        String fileName = KotlinTestUtils.navigationMetadata("idea/testData/multiFileIntentions/objectLiteralToLambda/objectLiteralToLambda.test");
+        doTest(fileName);
+    }
+
     @TestMetadata("reconcilePackageWithDirectory/changeToDefaultPackage/changeToDefaultPackage.test")
     public void testReconcilePackageWithDirectory_changeToDefaultPackage_ChangeToDefaultPackage() throws Exception {
         String fileName = KotlinTestUtils.navigationMetadata("idea/testData/multiFileIntentions/reconcilePackageWithDirectory/changeToDefaultPackage/changeToDefaultPackage.test");