Control characters in note

[jaxson5]

Hi,

I'm using Debian 13 on wayland (wayfire).

If I save a not with the following in it locks the file with an unknown password.

�6Feathers
(control-k6 for color)
or
�dwe
(control-b for bold)

I don't have any way around it apart from not using control-k characters.

I tried grabbing the latest source and compiling it, but still the same issue.

Regards,
jax

[tsujan]

I don't have any way around it apart from not using control-k characters.

You may have encountered this: #397. Qt6 doesn't accept such characters in its XML docs anymore.

[tsujan]

The backward-incompatible change in Qt6 isn't good news, but why should you add control characters in the first place? Qt uses HTML tags, which are included through FeatherNotes' formatting actions (or their shortcuts).

[jaxson5]

Thanks for the responses. I just use it for notes but might have to look elsewhere.. I don't need the extra security of a password. I'll likely come back to it at some stage :)

[tsujan]

It's not about a real password. When you add a control character, Qt6 can't open it and the app thinks that a password is needed.

[tsujan]

In short, QDomDocument::setContent() fails in Qt6 if there is any control character inside the document, while the same function worked fine with those characters in Qt5. Also read https://doc.qt.io/qt-6/xml-changes-qt6.html#control-characters.

The code removes 0x000E, 0x000F, 0x0010 and 0x0011 as a workaround, but searching and removing all control characters isn't an option because it can be expensive.

So, make sure you do not add control characters to your notes! Fortunately, they're very rare and have no real use.

[tsujan]

Extended the workaround to all "C0 controls": 20c081d. I think it should cover all rare cases.