operator == method

  1. @override
bool operator == (
  1. dynamic other
)
override

The equality operator.

The default behavior for all Objects is to return true if and only if this and other are the same object.

Override this method to specify a different equality relation on a class. The overriding method must still be an equivalence relation. That is, it must be:

  • Total: It must return a boolean for all arguments. It should never throw or return null.

  • Reflexive: For all objects o, o == o must be true.

  • Symmetric: For all objects o1 and o2, o1 == o2 and o2 == o1 must either both be true, or both be false.

  • Transitive: For all objects o1, o2, and o3, if o1 == o2 and o2 == o3 are true, then o1 == o3 must be true.

The method should also be consistent over time, so whether two objects are equal should only change if at least one of the objects was modified.

If a subclass overrides the equality operator it should override the hashCode method as well to maintain consistency.

Implementation

@override
bool operator ==(dynamic other) {
  if (identical(this, other))
    return true;
  if (other is! TextStyle)
    return false;
  final TextStyle typedOther = other;
  if (_fontFamily != typedOther._fontFamily ||
      _fontSize != typedOther._fontSize ||
      _letterSpacing != typedOther._letterSpacing ||
      _wordSpacing != typedOther._wordSpacing ||
      _height != typedOther._height ||
      _decorationThickness != typedOther._decorationThickness ||
      _locale != typedOther._locale ||
      _background != typedOther._background ||
      _foreground != typedOther._foreground)
   return false;
  for (int index = 0; index < _encoded.length; index += 1) {
    if (_encoded[index] != typedOther._encoded[index])
      return false;
  }
  if (!_listEquals<Shadow>(_shadows, typedOther._shadows))
    return false;
  if (!_listEquals<String>(_fontFamilyFallback, typedOther._fontFamilyFallback))
    return false;
  if (!_listEquals<FontFeature>(_fontFeatures, typedOther._fontFeatures))
    return false;
  return true;
}