Review Request 122270: port kcminit away from kdelibs4support

Thomas Lübking thomas.luebking at gmail.com
Wed Jan 28 01:32:54 GMT 2015


> On Jan. 27, 2015, 6:59 vorm., Martin Gräßlin wrote:
> > startkde/kcminit/main.cpp, lines 250-254
> > <https://git.reviewboard.kde.org/r/122270/diff/1/?file=345342#file345342line250>
> >
> >     I do not like this. If the only need is to check whether it's X11 multi-head, it should open an xcb_connection_t - if that fails we don't have an X-Server. If it succeeds we can check the number of screens.
> 
> Nick Shaforostoff wrote:
>     understood, but the question remains: is kcminit the best place to do multihead-related stuff?

It's required by KApplication and while that's in kde4support, it's still there (as well as KDE4 clients)
So "yes, we need that everywhere" - for now.

Clients seem to default the env to false, so uncoditionally setting it true is wrong for sure.

It'd rather be "multihead = (screenCount > 1);" (ignoring the ini) what however would be a feature loss.


=> Proposal
users should be able to pre-control the variable in eg. ~/.kde/env (or wherever the Plasma 2 equivalent is)
If the variable is set to false, it remains like that.
If not (ie. it's not set or set true resp. anything but 0/false) it becomes true if the screen count > 1

Spares the ini lookup, but I don't think you get around 

xcb_connection_t *c;
int screen_count = xcb_setup_roots_length(xcb_get_setup(c));

without risking to really break stuff (the suggested approach still causes a transitional break)


- Thomas


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On Jan. 28, 2015, 12:47 vorm., Nick Shaforostoff wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://git.reviewboard.kde.org/r/122270/
> -----------------------------------------------------------
> 
> (Updated Jan. 28, 2015, 12:47 vorm.)
> 
> 
> Review request for kde-workspace, Aleix Pol Gonzalez, Martin Gräßlin, and Lukáš Tinkl.
> 
> 
> Repository: plasma-workspace
> 
> 
> Description
> -------
> 
> Now kcminit is linked with less libraries -> startup time improved
> 
> I also suggest always setting KDE_MULTIHEAD=true to eliminate ini file access during startup and to be able to stop linking against QtGui
> 
> 
> Diffs
> -----
> 
>   startkde/kcminit/CMakeLists.txt ffae38c 
>   startkde/kcminit/main.h 1140b77 
>   startkde/kcminit/main.cpp 4724323 
> 
> Diff: https://git.reviewboard.kde.org/r/122270/diff/
> 
> 
> Testing
> -------
> 
> compiled, ran 'kcminit --list' and kcminit AAA
> 
> 
> Thanks,
> 
> Nick Shaforostoff
> 
>

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