Rename: Fix renaming of .kts file to .kt and vice versa

#KT-14814 Fixed

ChangeLog.md

@@ -336,6 +336,7 @@ These artifacts include extensions for the types available in the latter JDKs, s
 
 - [`KT-14583`](https://youtrack.jetbrains.com/issue/KT-14583) Change Signature: Use new signature when looking for redeclaration conflicts
 - [`KT-14854`](https://youtrack.jetbrains.com/issue/KT-14854) Extract Interface: Fix NPE on dialog opening
+- [`KT-14814`](https://youtrack.jetbrains.com/issue/KT-14814) Rename: Fix renaming of .kts file to .kt and vice versa
 
 ## 1.0.5
 

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

@@ -21,9 +21,12 @@ import com.intellij.lang.ASTNode;
 import com.intellij.lang.FileASTNode;
 import com.intellij.openapi.components.ServiceManager;
 import com.intellij.openapi.fileTypes.FileType;
+import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.*;
 import com.intellij.psi.stubs.StubElement;
 import com.intellij.psi.util.PsiTreeUtil;
+import com.intellij.util.FileContentUtilCore;
+import com.intellij.util.IncorrectOperationException;
 import kotlin.collections.ArraysKt;
 import kotlin.jvm.functions.Function1;
 import org.jetbrains.annotations.NotNull;
@@ -32,9 +35,11 @@ import org.jetbrains.kotlin.KtNodeTypes;
 import org.jetbrains.kotlin.idea.KotlinFileType;
 import org.jetbrains.kotlin.idea.KotlinLanguage;
 import org.jetbrains.kotlin.name.FqName;
+import org.jetbrains.kotlin.parsing.KotlinParserDefinition;
 import org.jetbrains.kotlin.psi.stubs.KotlinFileStub;
 import org.jetbrains.kotlin.psi.stubs.elements.KtPlaceHolderStubElementType;
 import org.jetbrains.kotlin.psi.stubs.elements.KtStubElementTypes;
+import org.jetbrains.kotlin.utils.CollectionsKt;
 
 import java.util.Arrays;
 import java.util.Collections;
@@ -268,4 +273,14 @@ public class KtFile extends PsiFileBase implements KtDeclarationContainer, KtAnn
                     }
                 });
     }
+
+    @Override
+    public PsiElement setName(@NotNull String name) throws IncorrectOperationException {
+        PsiElement result = super.setName(name);
+        boolean willBeScript = name.endsWith(KotlinParserDefinition.STD_SCRIPT_EXT);
+        if (isScript() != willBeScript) {
+            FileContentUtilCore.reparseFiles(CollectionsKt.<VirtualFile>singletonOrEmptyList(getVirtualFile()));
+        }
+        return result;
+    }
 }