Support output IDs

[wille]

I need to support targeting the output with the output identifier (Dell Inc. DELL U3223QE GB6Y9P3) rather than just the output name (eg. DP-6) because the output name might change every time I replug my monitors and I want my internal OLED display to have no image while my external monitors should have a nice image.

Example:
swaylock -f -c 000000 --image "Dell Inc. DELL U3223QE GB6Y9P3":~/Pictures/1.jpg -d

The wl_output_description returns the full model, make and output name so I am trimming the output name from the output description to match kanshi and sway output id matching.

[emersion]

Unfortunately, this adds assumptions about the format of the output description which are unreliable and non-portable across compositors. I'd rather not do that.

[wille]

You're definitively right, I was wondering if you can point me in the right direction to reliably get this ID just as in Kanshi or sway output

[emersion]

Sadly there is no way to get this information. I'm not sure just adding an event to pass it to clients is a good way forward, an opaque tag might be better, see the discussions in https://gitlab.freedesktop.org/wayland/wayland/-/merge_requests/109#note_970789

[wille]

Sorry I don't follow, both sway and kanshi supports targeting the output by the identifier which I want to do here as well.

I just pushed a new commit to simply check if the output description contains the output name provided to --image, so --image "Dell Inc. DELL U3223QE GB6Y9P3":~/Pictures/1.jpg would match the output_descripton Dell Inc. DELL U3223QE GB6Y9P3 (DP-X)