DrawTextMultiLine skips lines with only CRLF

[kuzma-t]

• I'm submitting a:

  • Vulnerability report -> use the specific form instead!
  • Bug report
  • Feature request/suggestion

• [Bug report] What is the current behavior?
  DrawTextMultiLine currently doesn't print blank lines; that is, lines with only the CRLF characters.

• [Bug report] What is the expected behavior?
  DrawTextMultiLine should also be able to print these lines.

• [Bug report] Please provide the steps to reproduce and if possible a minimal reproduction code of the problem
  std::string lines_str{"line1\r\n\r\nline3\r\n"};
painter.DrawTextMultiLine(lines_str, 0.0, 0.0, 200.0, 300.0, PdfDrawTextMultiLineParams());
// expected result should be
// line1
//
// line3
// instead the actual result is
// line1
// line3

• [Feature request] What feature should be implemented in PoDoFo?

• Please tell us about your environment:

  • Version/git revision: [0.10.0(latest version on vcpkg, as of posting)]
  • Operating System: [Windows (64 bits) | MacOs]
  • Package manager used: [vcpkg]

• [Bug report/Feature request] Other information

[Francesco Pretto]

Some triage, after a while: it makes sense. Something should be done so newlines are processed this way (and \r ignored, as we don't support MacOS classic, version <= 9) in this function (which maybe could be simplified, as well). It's a low priority for me but patches are welcome.