Minor: Replace PsiFile with KtFile in utility functions

idea/src/org/jetbrains/kotlin/idea/refactoring/KotlinRefactoringUtil.java

@@ -332,15 +332,15 @@ public class KotlinRefactoringUtil {
 
     public static void selectExpression(
             @NotNull Editor editor,
-            @NotNull PsiFile file,
+            @NotNull KtFile file,
             @NotNull SelectExpressionCallback callback) throws IntroduceRefactoringException {
         selectExpression(editor, file, true, callback);
     }
 
     public static void selectExpression(@NotNull Editor editor,
-                                        @NotNull PsiFile file,
+            @NotNull KtFile file,
-                                        boolean failOnEmptySuggestion,
+            boolean failOnEmptySuggestion,
-                                        @NotNull SelectExpressionCallback callback) throws IntroduceRefactoringException {
+            @NotNull SelectExpressionCallback callback) throws IntroduceRefactoringException {
         if (editor.getSelectionModel().hasSelection()) {
             int selectionStart = editor.getSelectionModel().getSelectionStart();
             int selectionEnd = editor.getSelectionModel().getSelectionEnd();
@@ -487,7 +487,7 @@ public class KotlinRefactoringUtil {
 
     @Nullable
     private static KtExpression findExpression(
-            @NotNull PsiFile file, int startOffset, int endOffset, boolean failOnNoExpression
+            @NotNull KtFile file, int startOffset, int endOffset, boolean failOnNoExpression
     ) throws IntroduceRefactoringException {
         KtExpression element = CodeInsightUtils.findExpression(file, startOffset, endOffset);
         if (element == null) {

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/extractFunction/ExtractKotlinFunctionHandler.kt

@@ -16,22 +16,21 @@
 
 package org.jetbrains.kotlin.idea.refactoring.introduce.extractFunction
 
-import com.intellij.refactoring.RefactoringActionHandler
 import com.intellij.openapi.actionSystem.DataContext
-import com.intellij.psi.PsiFile
 import com.intellij.openapi.editor.Editor
-import com.intellij.psi.PsiElement
 import com.intellij.openapi.project.Project
+import com.intellij.psi.PsiElement
+import com.intellij.psi.PsiFile
+import com.intellij.refactoring.RefactoringActionHandler
 import org.jetbrains.kotlin.idea.core.refactoring.getExtractionContainers
 import org.jetbrains.kotlin.idea.refactoring.KotlinRefactoringBundle
 import org.jetbrains.kotlin.idea.refactoring.introduce.extractFunction.ui.KotlinExtractFunctionDialog
-import org.jetbrains.kotlin.psi.KtFile
-import org.jetbrains.kotlin.psi.KtBlockExpression
-import kotlin.test.fail
-import org.jetbrains.kotlin.psi.KtFunctionLiteral
-import org.jetbrains.kotlin.idea.util.psi.patternMatching.toRange
 import org.jetbrains.kotlin.idea.refactoring.introduce.extractionEngine.*
-import org.jetbrains.kotlin.idea.refactoring.introduce.*
+import org.jetbrains.kotlin.idea.refactoring.introduce.selectElementsWithTargetSibling
+import org.jetbrains.kotlin.idea.util.psi.patternMatching.toRange
+import org.jetbrains.kotlin.psi.KtBlockExpression
+import org.jetbrains.kotlin.psi.KtFile
+import kotlin.test.fail
 
 public class ExtractKotlinFunctionHandler(
         public val allContainersEnabled: Boolean = false,
@@ -63,7 +62,7 @@ public class ExtractKotlinFunctionHandler(
         }
     }
 
-    fun selectElements(editor: Editor, file: PsiFile, continuation: (elements: List<PsiElement>, targetSibling: PsiElement) -> Unit) {
+    fun selectElements(editor: Editor, file: KtFile, continuation: (elements: List<PsiElement>, targetSibling: PsiElement) -> Unit) {
         selectElementsWithTargetSibling(
                 EXTRACT_FUNCTION,
                 editor,

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceParameter/KotlinIntroduceParameterHandler.kt

@@ -171,7 +171,7 @@ private fun isObjectOrNonInnerClass(e: PsiElement): Boolean = e is KtObjectDecla
 
 fun selectNewParameterContext(
         editor: Editor,
-        file: PsiFile,
+        file: KtFile,
         continuation: (elements: List<PsiElement>, targetParent: PsiElement) -> Unit
 ) {
     selectElementsWithTargetParent(

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceProperty/KotlinIntroducePropertyHandler.kt

@@ -28,8 +28,6 @@ import org.jetbrains.kotlin.idea.util.psi.patternMatching.*
 import kotlin.test.*
 import com.intellij.openapi.application.*
 import org.jetbrains.kotlin.idea.core.refactoring.getExtractionContainers
-import org.jetbrains.kotlin.idea.refactoring.introduce.extractFunction.EXTRACT_FUNCTION
-import org.jetbrains.kotlin.idea.refactoring.introduce.introduceProperty.*
 import java.util.*
 
 public class KotlinIntroducePropertyHandler(
@@ -54,7 +52,7 @@ public class KotlinIntroducePropertyHandler(
         }
     }
 
-    public fun selectElements(editor: Editor, file: PsiFile, continuation: (elements: List<PsiElement>, targetSibling: PsiElement) -> Unit) {
+    public fun selectElements(editor: Editor, file: KtFile, continuation: (elements: List<PsiElement>, targetSibling: PsiElement) -> Unit) {
         selectElementsWithTargetSibling(
                 INTRODUCE_PROPERTY,
                 editor,

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceUtil.kt

@@ -21,13 +21,13 @@ import com.intellij.openapi.editor.ScrollType
 import com.intellij.openapi.project.Project
 import com.intellij.openapi.util.Key
 import com.intellij.psi.PsiElement
-import com.intellij.psi.PsiFile
 import com.intellij.psi.util.PsiTreeUtil
 import org.jetbrains.kotlin.idea.codeInsight.CodeInsightUtils
 import org.jetbrains.kotlin.idea.core.refactoring.chooseContainerElementIfNecessary
 import org.jetbrains.kotlin.idea.refactoring.KotlinRefactoringBundle
 import org.jetbrains.kotlin.idea.refactoring.KotlinRefactoringUtil
 import org.jetbrains.kotlin.psi.KtExpression
+import org.jetbrains.kotlin.psi.KtFile
 import org.jetbrains.kotlin.psi.psiUtil.collectDescendantsOfType
 import org.jetbrains.kotlin.psi.psiUtil.findDescendantOfType
 import org.jetbrains.kotlin.psi.psiUtil.getOutermostParentContainedIn
@@ -43,7 +43,7 @@ fun showErrorHintByKey(project: Project, editor: Editor, messageKey: String, tit
 fun selectElementsWithTargetSibling(
         operationName: String,
         editor: Editor,
-        file: PsiFile,
+        file: KtFile,
         getContainers: (elements: List<PsiElement>, commonParent: PsiElement) -> List<PsiElement>,
         continuation: (elements: List<PsiElement>, targetSibling: PsiElement) -> Unit
 ) {
@@ -71,7 +71,7 @@ fun selectElementsWithTargetSibling(
 fun selectElementsWithTargetParent(
         operationName: String,
         editor: Editor,
-        file: PsiFile,
+        file: KtFile,
         getContainers: (elements: List<PsiElement>, commonParent: PsiElement) -> List<PsiElement>,
         continuation: (elements: List<PsiElement>, targetParent: PsiElement) -> Unit
 ) {

idea/src/org/jetbrains/kotlin/idea/refactoring/introduce/introduceVariable/KotlinIntroduceVariableHandler.kt

@@ -579,6 +579,7 @@ object KotlinIntroduceVariableHandler : KotlinIntroduceHandlerBase() {
     }
 
     override fun invoke(project: Project, editor: Editor, file: PsiFile, dataContext: DataContext) {
+        if (file !is KtFile) return
         try {
             KotlinRefactoringUtil.selectExpression(editor, file) { doRefactoring(project, editor, it, null, null) }
         }

idea/tests/org/jetbrains/kotlin/idea/AbstractExpressionSelectionTest.java

@@ -31,7 +31,7 @@ public abstract class AbstractExpressionSelectionTest extends LightCodeInsightTe
         final String expectedExpression = KotlinTestUtils.getLastCommentInFile((KtFile) getFile());
 
         try {
-            KotlinRefactoringUtil.selectExpression(getEditor(), getFile(), new KotlinRefactoringUtil.SelectExpressionCallback() {
+            KotlinRefactoringUtil.selectExpression(getEditor(), (KtFile) getFile(), new KotlinRefactoringUtil.SelectExpressionCallback() {
                 @Override
                 public void run(@Nullable KtExpression expression) {
                     assertNotNull("Selected expression mustn't be null", expression);