[ffigen] Fix bug in NSRange import (#1602)

pkgs/ffigen/CHANGELOG.md

@@ -14,6 +14,8 @@
   ObjC but before the invocation was received by Dart:
   https://github.com/dart-lang/native/issues/1571
 - `sort:` config option now affects ObjC interface/protocol methods.
+- Fix a bug where `NSRange` was not being imported from package:objective_c:
+  https://github.com/dart-lang/native/issues/1180
 
 ## 14.0.1
 

pkgs/ffigen/lib/src/code_generator/compound.dart

@@ -105,7 +105,7 @@ abstract class Compound extends BindingType {
   }
 
   bool get _isBuiltIn =>
-      objCBuiltInFunctions?.isBuiltInCompound(originalName) ?? false;
+      objCBuiltInFunctions?.getBuiltInCompoundName(originalName) != null;
 
   @override
   BindingString toBindingString(Writer w) {
@@ -188,7 +188,11 @@ abstract class Compound extends BindingType {
   bool get isIncompleteCompound => isIncomplete;
 
   @override
-  String getCType(Writer w) => _isBuiltIn ? '${w.objcPkgPrefix}.$name' : name;
+  String getCType(Writer w) {
+    final builtInName =
+        objCBuiltInFunctions?.getBuiltInCompoundName(originalName);
+    return builtInName != null ? '${w.objcPkgPrefix}.$builtInName' : name;
+  }
 
   @override
   String getNativeType({String varName = ''}) => '$nativeType $varName';

pkgs/ffigen/lib/src/code_generator/objc_built_in_functions.dart

@@ -43,7 +43,7 @@ class ObjCBuiltInFunctions {
       ObjCImport('UnimplementedOptionalMethodException');
 
   // Keep in sync with pkgs/objective_c/ffigen_objc.yaml.
-  static const builtInInterfaces = {
+  static const _builtInInterfaces = {
     'DartProxy',
     'DartProxyBuilder',
     'NSArray',
@@ -78,11 +78,11 @@ class ObjCBuiltInFunctions {
     'NSValue',
     'Protocol',
   };
-  static const builtInCompounds = {
-    'NSFastEnumerationState',
-    'NSRange',
+  static const _builtInCompounds = {
+    'NSFastEnumerationState': 'NSFastEnumerationState',
+    '_NSRange': 'NSRange',
   };
-  static const builtInEnums = {
+  static const _builtInEnums = {
     'NSBinarySearchingOptions',
     'NSComparisonResult',
     'NSDataBase64DecodingOptions',
@@ -110,11 +110,11 @@ class ObjCBuiltInFunctions {
   // TODO(https://github.com/dart-lang/native/issues/1173): Ideally this check
   // would be based on more than just the name.
   bool isBuiltInInterface(String name) =>
-      !generateForPackageObjectiveC && builtInInterfaces.contains(name);
-  bool isBuiltInCompound(String name) =>
-      !generateForPackageObjectiveC && builtInCompounds.contains(name);
+      !generateForPackageObjectiveC && _builtInInterfaces.contains(name);
+  String? getBuiltInCompoundName(String name) =>
+      generateForPackageObjectiveC ? null : _builtInCompounds[name];
   bool isBuiltInEnum(String name) =>
-      !generateForPackageObjectiveC && builtInEnums.contains(name);
+      !generateForPackageObjectiveC && _builtInEnums.contains(name);
   bool isNSObject(String name) => name == 'NSObject';
 
   // We need to load a separate instance of objc_msgSend for each signature. If

pkgs/ffigen/test/native_objc_test/ns_range_test.dart

@@ -0,0 +1,44 @@
+// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+// Objective C support is only available on mac.
+@TestOn('mac-os')
+
+import 'dart:ffi';
+import 'dart:io';
+
+import 'package:ffi/ffi.dart';
+import 'package:ffigen/ffigen.dart';
+import 'package:ffigen/src/config_provider/config.dart';
+import 'package:ffigen/src/config_provider/config_types.dart';
+import 'package:logging/logging.dart';
+import 'package:pub_semver/pub_semver.dart';
+import 'package:test/test.dart';
+import '../test_utils.dart';
+import 'util.dart';
+
+void main() {
+  group('NSRange', () {
+    late final String bindings;
+    setUpAll(() {
+      final config = Config(
+        wrapperName: 'NSRangeTestObjCLibrary',
+        language: Language.objc,
+        output: Uri.file('test/native_objc_test/ns_range_bindings.dart'),
+        entryPoints: [Uri.file('test/native_objc_test/ns_range_test.m')],
+        formatOutput: false,
+        objcInterfaces: DeclarationFilters.include({'SFTranscriptionSegment'}),
+      );
+      FfiGen(logLevel: Level.SEVERE).run(config);
+      bindings = File('test/native_objc_test/ns_range_bindings.dart')
+          .readAsStringSync();
+    });
+
+    test('interfaces', () {
+      // Regression test for https://github.com/dart-lang/native/issues/1180.
+      expect(bindings.split('\n'),
+          isNot(contains(matches(RegExp(r'class.*NSRange.*Struct')))));
+    });
+  });
+}

pkgs/ffigen/test/native_objc_test/ns_range_test.m

@@ -0,0 +1,5 @@
+// Copyright (c) 2024, the Dart project authors. Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#import <Speech/Speech.h>