normalizeIndent function

String normalizeIndent(String text)

Normalizes a indent, removing the common/global indent of the code.

Useful to remove indent caused due declaration inside a multiline String with it's own indentation.

Implementation

String normalizeIndent(String text) {
  if (text.isEmpty) return text;

  var lines = text.split(RegExp(r'[\r\n]'));

  if (lines.length <= 2) return text;

  // ignore: omit_local_variable_types
  Map<String, int> indentCount = {};

  for (var line in lines) {
    var indent = line.split(RegExp(r'\S'))[0];
    var count = indentCount[indent] ?? 0;
    indentCount[indent] = count + 1;
  }

  if (indentCount.isEmpty) return text;

  var identList = List.from(indentCount.keys)
    ..sort((a, b) => indentCount[b]!.compareTo(indentCount[a]!));

  String mainIdent = identList[0];

  if (mainIdent.isEmpty) return text;

  for (var i = 0; i < lines.length; i++) {
    var line = lines[i];
    if (line.startsWith(mainIdent)) {
      var line2 = line.substring(mainIdent.length);
      lines[i] = line2;
    }
  }

  var textNorm = lines.join('\n');

  return textNorm;
}