applyOperationTo method

String applyOperationTo(String text)

Implementation

String applyOperationTo(String text) {
  if (start == null || end == null)
    throw Exception("No selection was applied to this TagOperation!");

  String before = text;
  String after;

  if (before.isEmpty) {
    after = "$startTag$endTag";
  }

  if (isPunctual) {
    if (isNoSelection) {
      after = "$before$startTag$endTag";
    } else {
      if (start == 0)
        after = "$startTag$endTag$before";
      else {
        String a = before.substring(0, start);
        String b = before.substring(start!);

        after = "$a$startTag$endTag$b";
      }
    }
  } else {
    String a = before.substring(0, start);
    String b = before.substring(start!, end);
    String c = before.substring(end!);

    after = "$a$startTag$b$endTag$c";
  }

  return after;
}