Smart step into function literal

idea/src/org/jetbrains/kotlin/idea/debugger/JetPositionManager.kt

@@ -228,7 +228,7 @@ public class JetPositionManager(private val myDebugProcess: DebugProcess) : Mult
     }
 
     public fun classNameForPosition(sourcePosition: SourcePosition): String? {
-        val psiElement = sourcePosition.getElementAt()
+        val psiElement = runReadAction { sourcePosition.getElementAt() }
         if (psiElement == null) {
             return null
         }

idea/src/org/jetbrains/kotlin/idea/debugger/stepping/KotlinLambdaMethodFilter.kt

@@ -0,0 +1,77 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.debugger.stepping
+
+import com.intellij.debugger.SourcePosition
+import com.intellij.debugger.engine.BreakpointStepMethodFilter
+import com.intellij.debugger.engine.DebugProcessImpl
+import com.intellij.debugger.engine.LambdaMethodFilter
+import com.intellij.openapi.util.text.StringUtil
+import com.intellij.psi.PsiElementFactory
+import com.intellij.util.Range
+import com.sun.jdi.Location
+import org.jetbrains.kotlin.idea.util.application.runReadAction
+import org.jetbrains.kotlin.psi.JetBlockExpression
+import org.jetbrains.kotlin.psi.JetFunctionLiteralExpression
+import org.jetbrains.kotlin.types.expressions.OperatorConventions
+
+public class KotlinLambdaMethodFilter(
+        lambda: JetFunctionLiteralExpression,
+        private val myCallingExpressionLines: Range<Int>
+): BreakpointStepMethodFilter {
+    private val myFirstStatementPosition: SourcePosition?
+    private val myLastStatementLine: Int
+
+    init {
+        var firstStatementPosition: SourcePosition? = null
+        var lastStatementPosition: SourcePosition? = null
+        val body = lambda.getBodyExpression()!!
+        val statements = body.getStatements()
+        if (statements.isNotEmpty()) {
+            firstStatementPosition = SourcePosition.createFromElement(statements.first())
+            if (firstStatementPosition != null) {
+                val lastStatement = statements.last()
+                lastStatementPosition = SourcePosition.createFromOffset(firstStatementPosition.getFile(), lastStatement.getTextRange().getEndOffset())
+            }
+        }
+        myFirstStatementPosition = firstStatementPosition
+        myLastStatementLine = if (lastStatementPosition != null) lastStatementPosition.getLine() else -1
+    }
+
+    override fun getBreakpointPosition(): SourcePosition? {
+        return myFirstStatementPosition
+    }
+
+    override fun getLastStatementLine(): Int {
+        return myLastStatementLine
+    }
+
+    override fun locationMatches(process: DebugProcessImpl, location: Location): Boolean {
+        val method = location.method()
+        return isLambdaName(method.name())
+    }
+
+    override fun getCallingExpressionLines(): Range<Int>? {
+        return myCallingExpressionLines
+    }
+
+    companion object {
+        public fun isLambdaName(name: String?): Boolean {
+            return name == OperatorConventions.INVOKE.asString()
+        }
+    }
+}

idea/src/org/jetbrains/kotlin/idea/debugger/stepping/KotlinLambdaSmartStepIntoTarget.kt

@@ -0,0 +1,46 @@
+/*
+ * Copyright 2010-2015 JetBrains s.r.o.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.jetbrains.kotlin.idea.debugger.stepping
+
+import com.intellij.debugger.actions.MethodSmartStepTarget
+import com.intellij.debugger.actions.SmartStepTarget
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiMethod
+import com.intellij.util.Range
+import org.jetbrains.kotlin.descriptors.DeclarationDescriptor
+import org.jetbrains.kotlin.idea.JetIcons
+import org.jetbrains.kotlin.name.Name
+import org.jetbrains.kotlin.psi.JetElement
+import org.jetbrains.kotlin.psi.JetFunctionLiteralExpression
+import org.jetbrains.kotlin.types.expressions.OperatorConventions
+import javax.swing.Icon
+
+public class KotlinLambdaSmartStepTarget(
+        label: String,
+        highlightElement: JetFunctionLiteralExpression,
+        lines: Range<Int>
+): SmartStepTarget(label, highlightElement, true, lines) {
+    override fun getIcon() = JetIcons.LAMBDA
+
+    fun getLambda() = getHighlightElement() as JetFunctionLiteralExpression
+
+    companion object {
+        fun calcLabel(descriptor: DeclarationDescriptor, paramName: Name): String {
+            return "${descriptor.getName().asString()}: ${paramName.asString()}.${OperatorConventions.INVOKE.asString()}()"
+        }
+    }
+}

idea/src/org/jetbrains/kotlin/idea/debugger/stepping/KotlinSmartStepIntoHandler.kt

@@ -20,25 +20,23 @@ import com.intellij.debugger.SourcePosition
 import com.intellij.debugger.actions.JvmSmartStepIntoHandler
 import com.intellij.debugger.actions.MethodSmartStepTarget
 import com.intellij.debugger.actions.SmartStepTarget
-import com.intellij.debugger.engine.BasicStepMethodFilter
-import com.intellij.debugger.engine.DebugProcessImpl
 import com.intellij.debugger.engine.MethodFilter
 import com.intellij.psi.PsiDocumentManager
 import com.intellij.psi.PsiMethod
 import com.intellij.util.Range
 import com.intellij.util.containers.OrderedSet
-import com.sun.jdi.Location
 import org.jetbrains.kotlin.asJava.LightClassUtil
 import org.jetbrains.kotlin.descriptors.CallableMemberDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.idea.caches.resolve.analyze
+import org.jetbrains.kotlin.idea.caches.resolve.analyzeAndGetResult
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
 import org.jetbrains.kotlin.idea.codeInsight.DescriptorToSourceUtilsIde
-import org.jetbrains.kotlin.idea.debugger.MockSourcePosition
-import org.jetbrains.kotlin.idea.util.application.runReadAction
 import org.jetbrains.kotlin.psi.*
 import org.jetbrains.kotlin.resolve.BindingContext
+import org.jetbrains.kotlin.resolve.calls.callUtil.getParentCall
 import org.jetbrains.kotlin.resolve.calls.callUtil.getResolvedCall
+import org.jetbrains.kotlin.resolve.inline.InlineUtil
 
 public class KotlinSmartStepIntoHandler : JvmSmartStepIntoHandler() {
 
@@ -68,7 +66,18 @@ public class KotlinSmartStepIntoHandler : JvmSmartStepIntoHandler() {
         element.accept(object: JetTreeVisitorVoid() {
 
             override fun visitFunctionLiteralExpression(expression: JetFunctionLiteralExpression) {
-                // skip calls in function literals
+                val context = expression.analyzeAndGetResult().bindingContext
+                val resolvedCall = expression.getParentCall(context).getResolvedCall(context)
+                if (resolvedCall != null && !InlineUtil.isInline(resolvedCall.getResultingDescriptor())) {
+                    val arguments = resolvedCall.getValueArguments()
+                    for ((param, argument) in arguments) {
+                        if (argument.getArguments().any { it.getArgumentExpression() == expression}) {
+                            val label = KotlinLambdaSmartStepTarget.calcLabel(resolvedCall.getResultingDescriptor(), param.getName())
+                            result.add(KotlinLambdaSmartStepTarget(label, expression, lines))
+                            break
+                        }
+                    }
+                }
             }
 
             override fun visitObjectLiteralExpression(expression: JetObjectLiteralExpression) {
@@ -177,9 +186,10 @@ public class KotlinSmartStepIntoHandler : JvmSmartStepIntoHandler() {
     }
 
     override fun createMethodFilter(stepTarget: SmartStepTarget?): MethodFilter? {
-        if (stepTarget is KotlinMethodSmartStepTarget) {
+        return when (stepTarget) {
-            return KotlinBasicStepMethodFilter(stepTarget)
+            is KotlinMethodSmartStepTarget -> KotlinBasicStepMethodFilter(stepTarget)
+            is KotlinLambdaSmartStepTarget -> KotlinLambdaMethodFilter(stepTarget.getLambda(), stepTarget.getCallingExpressionLines()!! )
+            else -> super.createMethodFilter(stepTarget)
         }
-        return super.createMethodFilter(stepTarget)
     }
 }

idea/testData/debugger/smartStepInto/funLiteral.kt

@@ -7,4 +7,4 @@ fun foo() {
 fun f1(f: () -> Unit) {}
 fun f2() {}
 
-// EXISTS: f1(Function0<? extends Unit>)
+// EXISTS: f1(Function0<? extends Unit>), f1: f.invoke()

idea/testData/debugger/smartStepInto/inlinedFunLiteral.kt

@@ -0,0 +1,7 @@
+fun foo() {
+    <caret>f1() { }
+}
+
+inline fun f1(f: () -> Unit) {}
+
+// EXISTS: f1(Function0<? extends Unit>)

idea/tests/org/jetbrains/kotlin/idea/debugger/AbstractSmartStepIntoTest.kt

@@ -23,6 +23,7 @@ import com.intellij.psi.util.PsiFormatUtil
 import com.intellij.psi.util.PsiFormatUtilBase
 import com.intellij.testFramework.fixtures.JavaCodeInsightTestFixture
 import com.intellij.testFramework.fixtures.LightCodeInsightFixtureTestCase
+import org.jetbrains.kotlin.idea.debugger.stepping.KotlinLambdaSmartStepTarget
 import org.jetbrains.kotlin.idea.debugger.stepping.KotlinSmartStepIntoHandler
 import org.jetbrains.kotlin.idea.test.JetLightCodeInsightFixtureTestCase
 import org.jetbrains.kotlin.idea.test.PluginTestCaseBase
@@ -40,7 +41,7 @@ public abstract class AbstractSmartStepIntoTest : JetLightCodeInsightFixtureTest
 
         val position = MockSourcePosition(_file = fixture.getFile(), _line = line, _offset = offset, _editor = fixture.getEditor())
 
-        val actual = KotlinSmartStepIntoHandler().findSmartStepTargets(position).map { renderTarget(it) }
+        val actual = KotlinSmartStepIntoHandler().findSmartStepTargets(position).map { it.getPresentation() }
 
         val expected = InTextDirectivesUtils.findListWithPrefixes(fixture.getFile()?.getText()!!.replace("\\,", "+++"), "// EXISTS: ").map { it.replace("+++", ",") }
 
@@ -73,30 +74,6 @@ public abstract class AbstractSmartStepIntoTest : JetLightCodeInsightFixtureTest
         return sb.toString()
     }
 
-    private fun renderTarget(target: SmartStepTarget): String {
-        val sb = StringBuilder()
-
-        val label = target.getLabel()
-        if (label != null) {
-            sb.append(label)
-        }
-        when (target) {
-            is MethodSmartStepTarget -> {
-                sb.append(PsiFormatUtil.formatMethod(
-                        target.getMethod(),
-                        PsiSubstitutor.EMPTY,
-                        PsiFormatUtilBase.SHOW_NAME or PsiFormatUtilBase.SHOW_PARAMETERS,
-                        PsiFormatUtilBase.SHOW_TYPE,
-                        999
-                ))
-            }
-            else -> {
-                sb.append("Renderer for ${target.javaClass} should be implemented")
-            }
-        }
-        return sb.toString()
-    }
-
     override fun getTestDataPath(): String? {
         return PluginTestCaseBase.getTestDataPathBase() + "/debugger/smartStepInto"
     }

idea/tests/org/jetbrains/kotlin/idea/debugger/SmartStepIntoTestGenerated.java

@@ -113,6 +113,12 @@ public class SmartStepIntoTestGenerated extends AbstractSmartStepIntoTest {
         doTest(fileName);
     }
 
+    @TestMetadata("inlinedFunLiteral.kt")
+    public void testInlinedFunLiteral() throws Exception {
+        String fileName = JetTestUtils.navigationMetadata("idea/testData/debugger/smartStepInto/inlinedFunLiteral.kt");
+        doTest(fileName);
+    }
+
     @TestMetadata("invoke.kt")
     public void testInvoke() throws Exception {
         String fileName = JetTestUtils.navigationMetadata("idea/testData/debugger/smartStepInto/invoke.kt");