[Libreoffice-ux-advise] [Bug 114147] Better support for DE themes to support Night mode/ Inverted colors in the LO GUI

https://bugs.documentfoundation.org/show_bug.cgi?id=114147

--- Comment #9 from Denis <den_lin@posteo.de> ---
(In reply to V Stuart Foote from comment #8)
> (In reply to Denis from comment #7)
> > You are talking about GUI. On my system LO already uses general (dark) OS DE
> > theme, as I have said in my opening message. I am talking about the document
> > colors: the document takes the most of the screen anyway and thus, the
> > colors in the document influence your eyes much more. What was discussed in
> > the previous two comments was using a custom theme for document
> > repesentation.
>
> What you request in OP is:
>
> "So, something like a filter that applies a CSS that inverts colors in the
> document (only visually, without changing the document). Even better if it
> would invert colors for the text and tables and significantly reduce the
> brightness of graphical elements (like images and diagrams) until they
> receive mouseover event."
>
> Arbitrarily inverting colors would not solve the general case. In fact LO
> already is capable of setting a visual theme for the document based on
> colors from the OS DE theme. But for bug 35365 [1] it was hard coded to
> COL_WHITE for DOCCOLOR and COL_BLACK for FONTCOLOR--regardless of DE theme
> in use.
>
> But that broke HC mode use for a11y, so in bug 71511 [2] LO now picks it up
> from the Accessibility configuration for HC (even if the OS DE is not
> flagged HC) and uses GetWindowColor() for DOCCOLOR and GetWindowTextColor()
> for FONTCOLOR under OS DE theme control.
>
> What is still needed is support of Dark themes for non-a11y use not bound to
> HC mode of the OS DE (as noted by Bjoern in bug 71511 #11), to support dark
> theme use. Those colors could be pulled from the OS DE theme, or could also
> have a different fixed color assigned. It would likely require another Tools
> -> Options -> View check box control.
>
> Point is those colors would either be drawn from OS DE theme, or would be
> generally fixed to support "dark" themes, but not be a simple reversal of
> the COL_BLACK & COL_WHITE now used.
>
> =-ref-=
> [1] https://gerrit.libreoffice.org/#/c/238/
>
> [2] https://gerrit.libreoffice.org/#/c/7484/

If what is currently discussed, with picking up DE theme and auto adjusting
accessibility options is solving someone's problems, that's fine - but it has
nothing to do with my original request (the name of which was different).

There were 2 main points: inverting all colors (ALL colors, not just black and
white) and the possibility to quickly turn it on/off.

Concerning the second:

"It would be nice if LibreOffice had some kind of "night mode" that when turned
on would draw the picture of the opened documents with inverted colors"
-->
"when turned on"

"qpdfview has a hot key that inverts colors for the opened documents, maybe the
same could be implemented in LibreOffice?"

And concerning the first: the whole point is inverting ALL colors, because no
theme is going to account for all colors that can be assigned by the sender of
the document manually
(https://bugs.documentfoundation.org/show_bug.cgi?id=114147#c5).

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