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Fast Equatable
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| abstract class FastEquatable extends Equatable { | |
| const FastEquatable(); | |
| @override | |
| bool operator ==(Object other) { | |
| return identical(this, other) || | |
| other is FastEquatable && | |
| other.runtimeType == runtimeType && | |
| fastEquals(props, other.props); | |
| } | |
| } | |
| bool fastEquals(List? list1, List? list2) { | |
| if (identical(list1, list2)) return true; | |
| if (list1 == null || list2 == null) return false; | |
| final length = list1.length; | |
| if (length != list2.length) return false; | |
| for (var i = 0; i < length; i++) { | |
| if (!_objectsEquals(list1[i], list2[i])) return false; | |
| } | |
| return true; | |
| } | |
| bool _objectsEquals(Object? object1, Object? object2) { | |
| if (identical(object1, object2)) { | |
| return true; | |
| } else if (_isEquatable(object1) && _isEquatable(object2)) { | |
| if (object1 != object2) return false; | |
| } else if (object1 is List && object2 is List) { | |
| return _fastEqualsIterable(object1, object2); | |
| } else if (object1 is Set && object2 is Set) { | |
| return _fastEqualsSet(object1, object2); | |
| } else if (object1 is Map && object2 is Map) { | |
| return _fastEqualsMap(object1, object2); | |
| } else if (object1?.runtimeType != object2?.runtimeType) { | |
| return false; | |
| } else if (object1 != object2) { | |
| return false; | |
| } | |
| return true; | |
| } | |
| bool _isEquatable(Object? object) { | |
| return object is FastEquatable || | |
| object is FastEquatableMixin || | |
| object is Equatable || | |
| object is EquatableMixin; | |
| } | |
| bool _fastEqualsSet(Set a, Set b) { | |
| final aLength = a.length; | |
| if (aLength != b.length) return false; | |
| if (identical(a, b)) return true; | |
| for (final element in a) { | |
| if (!b.contains(element)) return false; | |
| } | |
| return true; | |
| } | |
| bool _fastEqualsIterable(Iterable a, Iterable b) { | |
| final aLength = a.length; | |
| if (aLength != b.length) return false; | |
| if (identical(a, b)) return true; | |
| for (var i = 0; i < aLength; i++) { | |
| if (!_objectsEquals(a.elementAt(i), b.elementAt(i))) return false; | |
| } | |
| return true; | |
| } | |
| bool _fastEqualsMap(Map a, Map b) { | |
| final aLength = a.length; | |
| if (aLength != b.length) return false; | |
| if (identical(a, b)) return true; | |
| for (final key in a.keys) { | |
| if (!_objectsEquals(a[key], b[key])) return false; | |
| } | |
| return true; | |
| } |
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