calculateTrailingGarbage method

  1. @visibleForTesting
  2. @protected
int calculateTrailingGarbage(
  1. {required int lastIndex}
)

Returns the number of children following the lastIndex that need to be garbage collected.

See also:

  • collectGarbage, which takes the leading and trailing number of children to be garbage collected.
  • calculateLeadingGarbage, which similarly returns the number of leading children to be garbage collected.

Implementation

@visibleForTesting
@protected
int calculateTrailingGarbage({required int lastIndex}) {
  RenderBox? walker = lastChild;
  int trailingGarbage = 0;
  while (walker != null && indexOf(walker) > lastIndex) {
    trailingGarbage += 1;
    walker = childBefore(walker);
  }
  return trailingGarbage;
}