1/* @internal */ 2namespace ts.codefix { 3 const errorCodes = [Diagnostics.This_import_is_never_used_as_a_value_and_must_use_import_type_because_importsNotUsedAsValues_is_set_to_error.code]; 4 const fixId = "convertToTypeOnlyImport"; 5 registerCodeFix({ 6 errorCodes, 7 getCodeActions: function getCodeActionsToConvertToTypeOnlyImport(context) { 8 const changes = textChanges.ChangeTracker.with(context, t => { 9 const importDeclaration = getImportDeclarationForDiagnosticSpan(context.span, context.sourceFile); 10 fixSingleImportDeclaration(t, importDeclaration, context); 11 }); 12 if (changes.length) { 13 return [createCodeFixAction(fixId, changes, Diagnostics.Convert_to_type_only_import, fixId, Diagnostics.Convert_all_imports_not_used_as_a_value_to_type_only_imports)]; 14 } 15 }, 16 fixIds: [fixId], 17 getAllCodeActions: function getAllCodeActionsToConvertToTypeOnlyImport(context) { 18 return codeFixAll(context, errorCodes, (changes, diag) => { 19 const importDeclaration = getImportDeclarationForDiagnosticSpan(diag, context.sourceFile); 20 fixSingleImportDeclaration(changes, importDeclaration, context); 21 }); 22 } 23 }); 24 25 function getImportDeclarationForDiagnosticSpan(span: TextSpan, sourceFile: SourceFile) { 26 return tryCast(getTokenAtPosition(sourceFile, span.start).parent, isImportDeclaration); 27 } 28 29 function fixSingleImportDeclaration(changes: textChanges.ChangeTracker, importDeclaration: ImportDeclaration | undefined, context: CodeFixContextBase) { 30 if (!importDeclaration?.importClause) { 31 return; 32 } 33 34 const { importClause } = importDeclaration; 35 // `changes.insertModifierBefore` produces a range that might overlap further changes 36 changes.insertText(context.sourceFile, importDeclaration.getStart() + "import".length, " type"); 37 38 // `import type foo, { Bar }` is not allowed, so move `foo` to new declaration 39 if (importClause.name && importClause.namedBindings) { 40 changes.deleteNodeRangeExcludingEnd(context.sourceFile, importClause.name, importDeclaration.importClause.namedBindings); 41 changes.insertNodeBefore(context.sourceFile, importDeclaration, factory.updateImportDeclaration( 42 importDeclaration, 43 /*modifiers*/ undefined, 44 factory.createImportClause( 45 /*isTypeOnly*/ true, 46 importClause.name, 47 /*namedBindings*/ undefined), 48 importDeclaration.moduleSpecifier, 49 /*assertClause*/ undefined)); 50 } 51 } 52} 53