match dark theme of system if no nextcloud theme specified

[lpranam]

problem example:
a new user is created who uses system dark mode, so nextcloud will be in dark mode but collabora would not be turned to dark mode as all the themes(ie:themeDark and themeDarkHighcontrast) value are undefined

• Target version: main

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Documentation (manuals or wiki) has been updated or is not required

[juliushaertl]

Thanks a lot @lpranam

There is indeed some inconsistency between the default for a new user or when manually setting the default, I adapted your change a bit to also properly work with public share links and to take the change from https://github.com/nextcloud/richdocuments/pull/3445/files into account

[juliushaertl]

/backport to stable28

[juliushaertl]

/backport to stable27

[Ornanovitch]

Interesting, thanks for this enhancement :)

However, while there is no doubt this will be great in the near future, Collabora still has a lot of problems with its "full dark" mode and a lot of NC users might complain soon. How could an admin "force" the light mode on in the meantime?

cc @juliushaertl @lpranam

[HolgerHees]

also after the latest fix, the error still happens. I'm running latest richdocument app (8.3.4)

I have embedded nextcloud inside an iframe like

outer frame is mydomain.de
nextcloud frame is nextcloud.mydomain.de

and I get the error "DOMException: Permission denied to access property "document" on cross-origin object"

I thin you should catch this kind of errors and just ignore, because it is not allowed to access the outer frame