fix(48544): allow to convert default exports to names for import type nodes (microsoft#48550)

Author: a-tarasyuk

src/services/findAllReferences.ts

@@ -1193,10 +1193,15 @@ namespace ts.FindAllReferences {
             cb: (ref: Identifier) => void,
         ): void {
             const importTracker = createImportTracker(sourceFiles, new Set(sourceFiles.map(f => f.fileName)), checker, cancellationToken);
-            const { importSearches, indirectUsers } = importTracker(exportSymbol, { exportKind: isDefaultExport ? ExportKind.Default : ExportKind.Named, exportingModuleSymbol }, /*isForRename*/ false);
+            const { importSearches, indirectUsers, singleReferences } = importTracker(exportSymbol, { exportKind: isDefaultExport ? ExportKind.Default : ExportKind.Named, exportingModuleSymbol }, /*isForRename*/ false);
             for (const [importLocation] of importSearches) {
                 cb(importLocation);
             }
+            for (const singleReference of singleReferences) {
+                if (isIdentifier(singleReference) && isImportTypeNode(singleReference.parent)) {
+                    cb(singleReference);
+                }
+            }
             for (const indirectUser of indirectUsers) {
                 for (const node of getPossibleSymbolReferenceNodes(indirectUser, isDefaultExport ? "default" : exportName)) {
                     // Import specifiers should be handled by importSearches

src/services/refactors/convertExport.ts

@@ -212,6 +212,10 @@ namespace ts.refactor {
                 }
                 break;
             }
+            case SyntaxKind.ImportType:
+                const importTypeNode = parent as ImportTypeNode;
+                changes.replaceNode(importingSourceFile, parent, factory.createImportTypeNode(importTypeNode.argument, factory.createIdentifier(exportName), importTypeNode.typeArguments, importTypeNode.isTypeOf));
+                break;
             default:
                 Debug.failBadSyntaxKind(parent);
         }

tests/cases/fourslash/refactorConvertExport_defaultToNamed3.ts

@@ -0,0 +1,18 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: /a.ts
+/////*a*/export default class A {}/*b*/
+
+// @Filename: /b.ts
+////export type A = typeof import("./a").default;
+
+goTo.select("a", "b");
+edit.applyRefactor({
+    refactorName: "Convert export",
+    actionName: "Convert default export to named export",
+    actionDescription: "Convert default export to named export",
+    newContent: {
+        "/a.ts": "export class A {}",
+        "/b.ts": "export type A = typeof import(\"./a\").A;"
+    },
+});