How to create CodeLineVisitor?

[minhnt3]

I'm trying to write a rule that is similar to this rule: lines_longer_than_80_chars. My project limit is 100 chars but I don't know how to visit every single line of code.

[minhnt3]

I did it, so I close this issue now.

extension CustomLintResolverExt on CustomLintResolver {
  void getLineContents(void Function(CodeLine codeLine) onCodeLine) {
    for (final startOffset in lineInfo.lineStarts) {
      final lineCount = lineInfo.lineStarts.length;
      final lineNumber = lineInfo.getLocation(startOffset).lineNumber;
      if (lineNumber <= lineCount - 1) {
        final startOffsetOfNextLine = lineInfo.getOffsetOfLineAfter(startOffset);
        final lineLength = startOffsetOfNextLine - startOffset - 1;
        onCodeLine(
          CodeLine(
            lineNumber: lineNumber,
            lineOffset: startOffset,
            lineLength: lineLength,
            content: source.contents.data.substring(
              startOffset,
              startOffsetOfNextLine,
            ),
          ),
        );
      }
    }
  }
}