provide element type name for multi-declaration entries; enable in-place rename for those; show local properties as "variable"

#KT-7627 Fixed

compiler/frontend/src/org/jetbrains/kotlin/psi/JetMultiDeclarationEntry.java

@@ -18,6 +18,8 @@ package org.jetbrains.kotlin.psi;
 
 import com.intellij.lang.ASTNode;
 import com.intellij.psi.PsiElement;
+import com.intellij.psi.search.LocalSearchScope;
+import com.intellij.psi.search.SearchScope;
 import com.intellij.psi.tree.TokenSet;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -134,4 +136,13 @@ public class JetMultiDeclarationEntry extends JetNamedDeclarationNotStubbed impl
     public FqName getFqName() {
         return null;
     }
+
+    @NotNull
+    @Override
+    public SearchScope getUseScope() {
+        JetElement enclosingBlock = JetPsiUtil.getEnclosingElementForLocalDeclaration(this, false);
+        if (enclosingBlock != null) return new LocalSearchScope(enclosingBlock);
+
+        return super.getUseScope();
+    }
 }

idea/idea-analysis/src/org/jetbrains/kotlin/idea/findUsages/JetFindUsagesProvider.kt

@@ -36,7 +36,8 @@ public class JetFindUsagesProvider : FindUsagesProvider {
             is JetNamedFunction -> "function"
             is JetClass -> "class"
             is JetParameter -> "parameter"
-            is JetProperty -> "property"
+            is JetProperty -> if (element.isLocal()) "variable" else "property"
+            is JetMultiDeclarationEntry -> "variable"
             is JetTypeParameter -> "type parameter"
             is JetSecondaryConstructor -> "constructor"
             is JetObjectDeclaration -> "object"

idea/src/org/jetbrains/kotlin/idea/findUsages/JetElementDescriptionProvider.kt

@@ -40,9 +40,10 @@ public class JetElementDescriptionProvider : ElementDescriptionProvider {
             is JetObjectDeclaration -> "object"
             is JetNamedFunction -> "function"
             is JetSecondaryConstructor -> "constructor"
-            is JetProperty -> "property"
+            is JetProperty -> if (targetElement.isLocal()) "variable" else "property"
             is JetTypeParameter -> "type parameter"
             is JetParameter -> "parameter"
+            is JetMultiDeclarationEntry -> "variable"
             else -> null
         }
 

idea/src/org/jetbrains/kotlin/idea/refactoring/KotlinRefactoringSupportProvider.kt

@@ -30,55 +30,44 @@ import org.jetbrains.kotlin.idea.refactoring.safeDelete.*
 import org.jetbrains.kotlin.psi.*
 
 public class KotlinRefactoringSupportProvider : RefactoringSupportProvider() {
-    override fun isSafeDeleteAvailable(element: PsiElement): Boolean {
-        return element.canDeleteElement()
-    }
+    override fun isSafeDeleteAvailable(element: PsiElement) = element.canDeleteElement()
 
-    override fun getIntroduceVariableHandler(): RefactoringActionHandler? {
-        return KotlinIntroduceVariableHandler()
-    }
+    override fun getIntroduceVariableHandler() = KotlinIntroduceVariableHandler()
 
-    override fun getIntroduceParameterHandler(): RefactoringActionHandler? {
-        return KotlinIntroduceParameterHandler()
-    }
+    override fun getIntroduceParameterHandler() = KotlinIntroduceParameterHandler()
 
-    public fun getIntroduceLambdaParameterHandler(): RefactoringActionHandler {
-        return KotlinIntroduceLambdaParameterHandler()
-    }
+    public fun getIntroduceLambdaParameterHandler(): RefactoringActionHandler = KotlinIntroduceLambdaParameterHandler()
 
-    public fun getIntroducePropertyHandler(): RefactoringActionHandler {
-        return KotlinIntroducePropertyHandler()
-    }
+    public fun getIntroducePropertyHandler(): RefactoringActionHandler = KotlinIntroducePropertyHandler()
 
-    public fun getExtractFunctionHandler(): RefactoringActionHandler {
-        return ExtractKotlinFunctionHandler()
-    }
+    public fun getExtractFunctionHandler(): RefactoringActionHandler =
+            ExtractKotlinFunctionHandler()
 
-    public fun getExtractFunctionToScopeHandler(): RefactoringActionHandler {
-        return ExtractKotlinFunctionHandler(true, ExtractKotlinFunctionHandler.InteractiveExtractionHelper)
-    }
+    public fun getExtractFunctionToScopeHandler(): RefactoringActionHandler =
+            ExtractKotlinFunctionHandler(true, ExtractKotlinFunctionHandler.InteractiveExtractionHelper)
 
     override fun isInplaceRenameAvailable(element: PsiElement, context: PsiElement?): Boolean {
-        if (element is JetProperty) {
-            if (element.isLocal()) return true
-        }
-        else if (element is JetFunction) {
-            if (element.isLocal()) return true
-        }
-        else if (element is JetParameter) {
-            val parent = element.getParent()
-            if (parent is JetForExpression) {
-                return true
+        when (element) {
+            is JetProperty -> {
+                if (element.isLocal()) return true
             }
-            if (parent is JetParameterList) {
-                val grandparent = parent.getParent()
-                return grandparent is JetCatchClause || grandparent is JetFunctionLiteral
+            is JetMultiDeclarationEntry -> return true
+            is JetFunction -> {
+                if (element.isLocal()) return true
+            }
+            is JetParameter -> {
+                val parent = element.getParent()
+                if (parent is JetForExpression) {
+                    return true
+                }
+                if (parent is JetParameterList) {
+                    val grandparent = parent.getParent()
+                    return grandparent is JetCatchClause || grandparent is JetFunctionLiteral
+                }
             }
         }
         return false
     }
 
-    override fun getChangeSignatureHandler(): ChangeSignatureHandler? {
-        return JetChangeSignatureHandler()
-    }
+    override fun getChangeSignatureHandler() = JetChangeSignatureHandler()
 }

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/moveClassToPackageWithConflicts/conflicts.txt

@@ -1,4 +1,4 @@
 Class a.Test uses package-private class a.Foo
 Class a.Test uses package-private function a.foo
 Package-private class a.Test will no longer be accessible from method J.bar()
-Package-private class a.Test will no longer be accessible from property a.bar.t
+Package-private class a.Test will no longer be accessible from variable a.bar.t

idea/testData/refactoring/move/kotlin/moveTopLevelDeclarations/moveObjectToPackageWithConflicts/conflicts.txt

@@ -1,4 +1,4 @@
 Object a.Test uses package-private class a.Foo
 Object a.Test uses package-private function a.foo
 Package-private object a.Test will no longer be accessible from method J.bar()
-Package-private object a.Test will no longer be accessible from property a.bar.t
+Package-private object a.Test will no longer be accessible from variable a.bar.t

idea/testData/refactoring/rename/inplace/MultiDeclaration.kt

@@ -0,0 +1,5 @@
+fun xyzzy(x: Pair<Int, String>) {
+    val (bar, ba<caret>z) = x
+    println(baz)
+    println(baz.length())
+}

idea/testData/refactoring/rename/inplace/MultiDeclaration.kt.after

@@ -0,0 +1,5 @@
+fun xyzzy(x: Pair<Int, String>) {
+    val (bar, foo) = x
+    println(foo)
+    println(foo.length())
+}

idea/tests/org/jetbrains/kotlin/idea/refactoring/InplaceRenameTest.kt

@@ -128,6 +128,10 @@ public class InplaceRenameTest : LightPlatformCodeInsightTestCase() {
         doTestInplaceRename("foo")
     }
 
+    public fun testMultiDeclaration() {
+        doTestInplaceRename("foo")
+    }
+
     private fun doTestInplaceRename(newName: String?) {
         configureByFile(getTestName(false) + ".kt")
         val element = TargetElementUtilBase.findTargetElement(