trailing newline is lost after paste, in webkit

[jdleesmiller]

One of our users at writelatex reported this:

Example: 'Hello[newline][newline]There'
Copy the Hello and the blank line after it.
Paste at the same point in the document.
The expected result is 'Hello[newline][newline]There'.
The observed result is 'Hello[newline]There'. The blank line disappeared.

It seems to affect both CM 2.38 (which we still use) and CM 3.12 (on the demo pages).

I can reproduce it in Safari 6.0.4 and Chrome 26 stable (Linux & Win XP). It does not occur on FF (WinXP) and IE 8. So, it looks like a webkit issue. I found #598, but that looks like the opposite problem -- extra newline added on paste.

Also, perhaps interestingly, if you copy 'Hello[newline][newline]' from Notepad and paste it into CM, the second newline is lost. However, if you copy 'Hello[newline][newline]' from CM into Notepad, the trailing newline is preserved.

I'm afraid I haven't yet had time to look into why this might be happening, but I figured I'd report it now. Thanks again for your work on this awesome project. :)

[marijnh]

I found an already open Webkit bug on this at https://bugs.webkit.org/show_bug.cgi?id=90206 , with a comment from someone who is apparently looking into it.

I did not find a workaround (beyond always attaching a trailing bogus character to the input, which is a bit more invasive than I'd like).