Code completion: shorter presentation for member extensions

idea/src/org/jetbrains/jet/plugin/completion/LookupElementFactory.kt

@@ -97,9 +97,13 @@ public open class LookupElementFactory protected() {
         if (descriptor is CallableDescriptor) {
             val receiver = descriptor.getExtensionReceiverParameter()
             if (receiver != null) {
-                val tail = " for " + DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(receiver.getType()) +
-                           " in " + DescriptorUtils.getFqName(descriptor.getContainingDeclaration())
-                element = element.appendTailText(tail, true)
+                val container = descriptor.getContainingDeclaration()
+                val containerPresentation = if (container is ClassDescriptor)
+                    DescriptorUtils.getFqNameFromTopLevelClass(container)
+                else
+                    DescriptorUtils.getFqName(container)
+                val receiverPresentation = DescriptorRenderer.SHORT_NAMES_IN_TYPES.renderType(receiver.getType())
+                element = element.appendTailText(" for $receiverPresentation in $containerPresentation", true)
             }
         }
 

idea/testData/completion/basic/common/extensions/Extensions.kt

@@ -1,11 +1,14 @@
 package a.b
 
 class Some {
-    fun foo() {
-        "".<caret>
+    class Nested {
+        fun foo() {
+            "".<caret>
+        }
+
+        fun String.memberExtFun() { }
     }
 
-    fun String.memberExtFun() { }
     val String.memberExtProp: Int get() = 1
 }
 
@@ -14,5 +17,5 @@ val String.extProp: Int get() = 1
 
 // EXIST: { lookupString: "extFun", itemText: "extFun", tailText: "() for String in a.b", typeText: "Unit" }
 // EXIST: { lookupString: "extProp", itemText: "extProp", tailText: " for String in a.b", typeText: "Int" }
-// EXIST: { lookupString: "memberExtFun", itemText: "memberExtFun", tailText: "() for String in a.b.Some", typeText: "Unit" }
-// EXIST: { lookupString: "memberExtProp", itemText: "memberExtProp", tailText: " for String in a.b.Some", typeText: "Int" }
+// EXIST: { lookupString: "memberExtFun", itemText: "memberExtFun", tailText: "() for String in Some.Nested", typeText: "Unit" }
+// EXIST: { lookupString: "memberExtProp", itemText: "memberExtProp", tailText: " for String in Some", typeText: "Int" }