pkgs/objective_c/tool/data/extra_methods.dart.in

// 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.

// Extra methods inserted into NSString by tool/generate_code.dart.
class NSString {
  factory NSString(String str) {
    final cstr = str.toNativeUtf16();
    final nsstr = stringWithCharacters_length_(cstr.cast(), str.length);
    pkg_ffi.calloc.free(cstr);
    return nsstr;
  }
}

// Extra methods inserted into NSArray by tool/generate_code.dart.
class NSArray with Iterable<objc.ObjCObjectBase> {
  /// Creates a [NSArray] of the given length with [fill] at each position.
  ///
  /// The [length] must be a non-negative integer.
  static NSArray filled(int length, objc.ObjCObjectBase fill) =>
      NSMutableArray.filled(length, fill);

  /// Creates a [NSArray] from [elements].
  static NSArray of(Iterable<objc.ObjCObjectBase> elements) =>
      NSMutableArray.of(elements);

  @override
  int get length => count;

  @override
  objc.ObjCObjectBase elementAt(int index) => objectAtIndex_(index);

  @override
  Iterator<objc.ObjCObjectBase> get iterator => _NSArrayIterator(this);

  objc.ObjCObjectBase operator [](int index) => objectAtIndex_(index);
}

// Extra methods inserted into NSMutableArray by tool/generate_code.dart.
class NSMutableArray with ListMixin<objc.ObjCObjectBase> {
  /// Creates a [NSMutableArray] of the given length with [fill] at each
  /// position.
  ///
  /// The [length] must be a non-negative integer.
  static NSMutableArray filled(int length, objc.ObjCObjectBase fill) {
    final a = arrayWithCapacity_(length);
    for (var i = 0; i < length; ++i) a.add(fill);
    return a;
  }

  /// Creates a [NSMutableArray] from [elements].
  static NSMutableArray of(Iterable<objc.ObjCObjectBase> elements) =>
      arrayWithCapacity_(elements.length)..addAll(elements);

  @override
  set length(int newLength) {
    var len = length;
    RangeError.checkValueInInterval(newLength, 0, len);
    for (; len > newLength; --len) removeLastObject();
  }

  @override
  void operator []=(int index, objc.ObjCObjectBase value) =>
      replaceObjectAtIndex_withObject_(index, value);

  @override
  void add(objc.ObjCObjectBase value) => addObject_(value);

  @override
  void addAll(Iterable<objc.ObjCObjectBase> iterable) {
    for (final value in iterable) add(value);
  }
}

class _NSArrayIterator implements Iterator<objc.ObjCObjectBase> {
  final Iterable<objc.ObjCObjectBase> _iterable;
  final int _length;
  int _index;
  objc.ObjCObjectBase? _current;

  _NSArrayIterator(Iterable<objc.ObjCObjectBase> iterable)
      : _iterable = iterable,
        _length = iterable.length,
        _index = 0;

  @override
  objc.ObjCObjectBase get current => _current!;

  @override
  @pragma('vm:prefer-inline')
  bool moveNext() {
    final length = _iterable.length;
    if (_length != length) {
      throw ConcurrentModificationError(_iterable);
    }
    if (_index >= length) {
      _current = null;
      return false;
    }
    _current = _iterable.elementAt(_index);
    _index++;
    return true;
  }
}