Add aliases for new tray icons in Plasma 6

[hexchain]

Starting in Plasma 6, tray applets will start to use the system icon theme.

This change adds aliases for some of the new icons, using current ones that make sense.

[SmartFinn]

Thanks, I still haven't seen the Plasma, so could you add a screenshot how the icons looks on it?

[morganist]

related to #3595

[hexchain]

Here is a screenshot of the Bluetooth applet tray icon and the Network applet. Network strength and Wi-Fi security are now correctly reflected in the icon:

[SmartFinn]

@hexchain I see. This is what I was afraid of. The Plasma 6 uses 22px symbolic icons instead of 16px. Papirus icon theme currently doesn't support it. Of course, we can add it symlinks into panel directory, but it not actually the symbolic icons. The symbolic icons use another classes for coloring warning, error, success. See Monochrome icons in our wiki.

So I can't merge it for a while. I have to find the way to deal with that mess.

[SmartFinn]

@hexchain so, is the -symbolic suffix necessary for the icons or not?

[hexchain]

In the first revision, I was using icons from the symbolic directory but found them to be slightly out of place (subtly bigger?) in the tray. It also lacks the "locked wireless" icons. That's why I switched to using the "panel" icons.

As for the -symbolic suffix: I'm trying to take advantage of the icon lookup algorithm in icon-theme-spec, which basically says if the icon loader cannot find an icon with the exact name, it should chop the last -<suffix> from the name until an icon is found. In this way, the new aliases in the panel directory are still reasonable (i.e. do not claim to be symbolic when they are actually not), and Plasma Shell can still find icons that are good enough.

[SmartFinn]

@hexchain thanks for the info. One more question, are the icons (without -symbolic suffix) using text color from Plasma theme?

[hexchain]

I don't know the correct answer (as in I'm not sure whether they are designed to use the global color scheme or not), but looking at some icons in this PR in Breeze icons, they seem to support the KDE Color Scheme and they do have elements with related classes: https://invent.kde.org/frameworks/breeze-icons/-/blob/master/icons/status/22/network-wireless-40-locked.svg?ref_type=heads&plain=1

[SmartFinn]

@hexchain is the screenshot above with symbolic icons, or not? If these are symbolic icons, please add another screenshot with the icons in PR.

[hexchain]

No, they are not symbolic icons.

[SmartFinn]

@hexchain

No, they are not symbolic icons.

Great. I'll merge this PR later.

[hexchain]

But here is a new screenshot anyway, with icons in a smaller panel:

[morganist]

@hexchain May I ask what distro you use to test plasma 6? I'm just curious. I've tried neon unstable in a VM but I don't have a device to install it to. Do you use something like KDE Neon Testing daily already?

[hexchain]

@hexchain May I ask what distro you use to test plasma 6? I'm just curious. I've tried neon unstable in a VM but I don't have a device to install it to. Do you use something like KDE Neon Testing daily already?

Hi, I use Arch Linux (btw) and have set up a Plasma development environment to build Plasma 6, using this guide.

[morganist]

@hexchain Cool! Thanks for the info.

[hexchain]

@SmartFinn Gentle prod :-)