resolveDirection method

TextDirection resolveDirection(TextDirection ambient)

auto follows the copy: right-to-left when the first strong character is Arabic / Hebrew script — the same rule the console preview uses.

Implementation

TextDirection resolveDirection(TextDirection ambient) {
  if (direction == 'rtl') return TextDirection.rtl;
  if (direction == 'ltr') return TextDirection.ltr;
  for (final b in blocks) {
    final text = switch (b) {
      NexusInAppHeadingBlock(:final text) || NexusInAppTextBlock(:final text) || NexusInAppBadgeBlock(:final text) => text,
      NexusInAppButtonsBlock(:final items) => items.map((i) => i.text).join(' '),
      NexusInAppCarouselBlock(:final cards) => cards.map((c) => '${c.title} ${c.body}').join(' '),
      _ => '',
    };
    for (final r in text.runes) {
      if (_isRtl(r)) return TextDirection.rtl;
      if (_isLtr(r)) return TextDirection.ltr;
    }
  }
  return ambient;
}