| // Copyright 2013 The Flutter Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| import 'package:flutter/foundation.dart'; |
| import 'package:flutter/services.dart'; |
| |
| import '../common/instance_manager.dart'; |
| import '../common/web_kit.pigeon.dart'; |
| import 'foundation.dart'; |
| |
| Iterable<NSKeyValueObservingOptionsEnumData> |
| _toNSKeyValueObservingOptionsEnumData( |
| Iterable<NSKeyValueObservingOptions> options, |
| ) { |
| return options.map<NSKeyValueObservingOptionsEnumData>(( |
| NSKeyValueObservingOptions option, |
| ) { |
| late final NSKeyValueObservingOptionsEnum? value; |
| switch (option) { |
| case NSKeyValueObservingOptions.newValue: |
| value = NSKeyValueObservingOptionsEnum.newValue; |
| break; |
| case NSKeyValueObservingOptions.oldValue: |
| value = NSKeyValueObservingOptionsEnum.oldValue; |
| break; |
| case NSKeyValueObservingOptions.initialValue: |
| value = NSKeyValueObservingOptionsEnum.initialValue; |
| break; |
| case NSKeyValueObservingOptions.priorNotification: |
| value = NSKeyValueObservingOptionsEnum.priorNotification; |
| break; |
| } |
| |
| return NSKeyValueObservingOptionsEnumData(value: value); |
| }); |
| } |
| |
| /// Handles initialization of Flutter APIs for the Foundation library. |
| // TODO(bparrishMines): Add NSObjectFlutterApiImpl once the callback methods |
| // are added. |
| class FoundationFlutterApis { |
| /// Constructs a [FoundationFlutterApis]. |
| @visibleForTesting |
| FoundationFlutterApis({ |
| BinaryMessenger? binaryMessenger, |
| // ignore: avoid_unused_constructor_parameters |
| InstanceManager? instanceManager, |
| }) : _binaryMessenger = binaryMessenger; |
| |
| static FoundationFlutterApis _instance = FoundationFlutterApis(); |
| |
| /// Sets the global instance containing the Flutter Apis for the Foundation library. |
| @visibleForTesting |
| static set instance(FoundationFlutterApis instance) { |
| _instance = instance; |
| } |
| |
| /// Global instance containing the Flutter Apis for the Foundation library. |
| static FoundationFlutterApis get instance { |
| return _instance; |
| } |
| |
| // ignore: unused_field |
| final BinaryMessenger? _binaryMessenger; |
| bool _hasBeenSetUp = false; |
| |
| /// Ensures all the Flutter APIs have been set up to receive calls from native code. |
| void ensureSetUp() { |
| if (!_hasBeenSetUp) { |
| _hasBeenSetUp = true; |
| } |
| } |
| } |
| |
| /// Host api implementation for [NSObject]. |
| @immutable |
| class NSObjectHostApiImpl extends NSObjectHostApi { |
| /// Constructs an [NSObjectHostApiImpl]. |
| NSObjectHostApiImpl({ |
| this.binaryMessenger, |
| InstanceManager? instanceManager, |
| }) : instanceManager = instanceManager ?? NSObject.globalInstanceManager, |
| super(binaryMessenger: binaryMessenger); |
| |
| /// Sends binary data across the Flutter platform barrier. |
| /// |
| /// If it is null, the default BinaryMessenger will be used which routes to |
| /// the host platform. |
| final BinaryMessenger? binaryMessenger; |
| |
| /// Maintains instances stored to communicate with Objective-C objects. |
| final InstanceManager instanceManager; |
| |
| /// Calls [addObserver] with the ids of the provided object instances. |
| Future<void> addObserverForInstances( |
| NSObject instance, |
| NSObject observer, |
| String keyPath, |
| Set<NSKeyValueObservingOptions> options, |
| ) { |
| return addObserver( |
| instanceManager.getIdentifier(instance)!, |
| instanceManager.getIdentifier(observer)!, |
| keyPath, |
| _toNSKeyValueObservingOptionsEnumData(options).toList(), |
| ); |
| } |
| |
| /// Calls [removeObserver] with the ids of the provided object instances. |
| Future<void> removeObserverForInstances( |
| NSObject instance, |
| NSObject observer, |
| String keyPath, |
| ) { |
| return removeObserver( |
| instanceManager.getIdentifier(instance)!, |
| instanceManager.getIdentifier(observer)!, |
| keyPath, |
| ); |
| } |
| |
| @override |
| int get hashCode { |
| return Object.hash(binaryMessenger, instanceManager); |
| } |
| |
| @override |
| bool operator ==(Object other) { |
| return other is NSObjectHostApiImpl && |
| binaryMessenger == other.binaryMessenger && |
| instanceManager == other.instanceManager; |
| } |
| } |