Debugger: Implement SourcePositionHighlighter to highlight lambda expressions during debug

idea/src/META-INF/plugin.xml

@@ -432,6 +432,7 @@
     <debuggerClassFilterProvider implementation="org.jetbrains.kotlin.idea.debugger.filter.KotlinDebuggerInternalClassesFilterProvider"/>
     <debugger.nodeRenderer implementation="org.jetbrains.kotlin.idea.debugger.render.KotlinClassWithDelegatedPropertyRenderer"/>
     <debugger.sourcePositionProvider implementation="org.jetbrains.kotlin.idea.debugger.KotlinSourcePositionProvider"/>
+    <debugger.sourcePositionHighlighter implementation="org.jetbrains.kotlin.idea.debugger.KotlinSourcePositionHighlighter"/>
     <debugger.frameExtraVarsProvider implementation="org.jetbrains.kotlin.idea.debugger.KotlinFrameExtraVariablesProvider"/>
     <debugger.extraSteppingFilter implementation="org.jetbrains.kotlin.idea.ExtraSteppingFilter"/>
     <xdebugger.settings implementation="org.jetbrains.kotlin.idea.debugger.KotlinDebuggerSettings"/>

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

@@ -0,0 +1,32 @@
+/*
+ * 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
+
+import com.intellij.debugger.SourcePosition
+import com.intellij.debugger.engine.SourcePositionHighlighter
+import com.intellij.openapi.util.TextRange
+import org.jetbrains.kotlin.psi.JetFunctionLiteral
+
+public class KotlinSourcePositionHighlighter: SourcePositionHighlighter() {
+    override fun getHighlightRange(sourcePosition: SourcePosition?): TextRange? {
+        val lambda = sourcePosition?.elementAt?.parent
+        if (lambda is JetFunctionLiteral) {
+            return lambda.textRange
+        }
+        return null
+    }
+}