Enhancement: Adding a option to list matched profiles

[op8867555]

This PR adds a option randrctl list -s to list matched profiles.

> randrctl list -s
office_dp1_normal 10
office_dp1 10
default 3
laptop-rot-right 1

I'm using this for several months with rofi and found it is quite convenient. I have binded XF86Display to randrctl auto and Shift+XF86Display to:

randrctl switch-to $(randrctl list -s | rofi -dmenu -p "randrctl switch-to " | cut -d" " -f1)

A quick screenshot to describe that:

There are some design choices can be discussed(for example, using space or tab as separator). Please take a look and feel free to review it.

[koiuo]

Thanks for a great feature. I'll review this PR later today or tomorrow.

[koiuo]

what do you think about changing this to > 0 ?

Honestly, I do not remember, why it is >= 0 and I haven't touched code for quite a while, so you might know better now.

But at least in the context of the feature you implemented listing profiles with score 0 doesn't seem to have any sense.

[op8867555]

If I'm right, a profile scored 0 means its doesn't have any match rules and it will always match. I'm not sure about what is the scenario people use a profile without any match rules. So s > 0 sounds more sense than s >= 0 in this case. I will change it to s > 0 later.

[koiuo]

@op8867555
So I checked, why we need score 0.

We want to match profiles that just declare the list of expected outputs

match:
  LVDS1: {}
  HDMI1: {}
outputs:
  LVDS1:
    ...
  HDMI1:
    ...

Behavior is: apply profile, if LVDS1 and HDMI1 are connected; and it doesn't matter, what is connected.

Previously there was a bug in the code, where profiles without match section were considered for auto-matching and score 0 was always calculated for such profiles.

I fixed the bug and updated tests (so, hopefully, it is now clear from tests, what the behavior should be).

Please, revert your last commit.

P.S. sorry for taking so long to reply and thanks again for contribution.

[op8867555]

Thanks for making it clear! I reverted the commit and removed some unnecessary parts.