applyMetadataToTextInSelection method

TextDeltas applyMetadataToTextInSelection({ required TextMetadata newMetadata, required TextDeltas deltas, required TextMetadataChange change, required TextSelection selection, })

Applies the newMetadata to the deltas in the selection by the change.

use TextMetadataChange.all to apply change to more than one metadata field change.

Implementation

TextDeltas applyMetadataToTextInSelection({
  required TextMetadata newMetadata,
  required TextDeltas deltas,
  required TextMetadataChange change,
  required TextSelection selection,
}) {
  final TextDeltas modifiedDeltas = deltas.copy;

  final int start = selection.start;
  final int end = selection.end;

  for (int i = start; i < end; i++) {
    modifiedDeltas[i] = modifiedDeltas[i].copyWith(
      metadata: modifiedDeltas[i].metadata?.combineWhatChanged(
                change,
                newMetadata,
              ) ??
          newMetadata,
    );
  }
  return modifiedDeltas;
}