How do I convert a plaintext file to OpenOffice document, so that tabs become indents?

Question

How do I convert (or paste) a plaintext file to OpenOffice document, so that tabs become indents?

Currently, dynamically wrapped long lines which start with a tab are only indented (by that tab) before the wrap. But after the wrap the lines are not indented at all.

Additional question: what about converting single newlines to soft returns and multiple newlines to hard returns?

Thank you.

Answer 1

Single newlines (cr lf) to soft returns (line breaks);

Ctrl+F, More options, "Regular expressions"
Find: \r\n
Replace with: \n

2 newlines (line breaks) to one hard return (cr lf);

Ctrl+F, More options, "Regular expressions"
Find: \n\n
Replace with: \r\n