redo method
Implementation
bool redo(FluentDocument document) {
if (!canRedo) return false;
final delta = _redoStack.removeLast();
_undoStack.add(delta);
_isRestoringState = true;
try {
delta.apply(document);
} catch (e, st) {
print('[UNDO_ERROR] apply failed: $e\n$st');
_undoStack.removeLast();
return false;
} finally {
_isRestoringState = false;
}
// Notify only the widgets whose nodes were touched by this delta.
final affectedIds = _collectAffectedIds(delta, document);
document.notifyDocumentChanged(affectedIds: affectedIds);
_resetGrouping();
return true;
}