Preserve newline LF/CRLF for each line

Currently CodeMirror has a single newline character for the whole document.

That means getValue may return different text to what setValue was called with, depending on the newlines used.

Can the code preserve the ending newline for each line of the document, and use exactly that when concatenating line text for ranges, copy/paste, getValue/setValue please?

Ideally pressing ‘Enter’ would be made smarter too, so it insert the right kind of newline based on the one at the end of the current line.

[mihailik]

Is it really how it should work? This approach produces visual garbage like red dots, may still break addins, and it even glues lines together (try "foo\nbar\rbaz").

Whereas keeping precise account of actual line terminators handles any of those cases and more. Say, you’d be able to implement stricter Unicode conformance, as there are actually more than 3 line terminators in the standard.

Also those compilers that pay attention to EOLs commonly have unit tests for handling the relevant combinations. It would be nice for CodeMirror to be able to open such unit test input files without going weird 😃

[marijnh]

If you have "foo\nbar\r\nbaz" as your document and your line-ending-determination algorithm decides that it is using "\n" as its main line separator. You create an instance with {doc: "foo\nbar\r\nbaz", lineSeparator: "\n"}, and you’ll get three visible lines foo, bar\r, and baz. I.e. the leftover characters that don’t match the document’s line separator are considered part of the line’s content, and show up in the editor.