this post was submitted on 16 Nov 2023
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Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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I thought that wms worked as full abstraction layers. It helped to reduce my confusion, thanks.
Typically the abstraction to draw elemnts inside a app window is in the application framework, like GTK, Qt, Electron (chromium), etc.
This is also why apps built with the same framework typically have the same problem on wayland (looking at you, electron).
The abstractions you are thinking of is not in the window manager, which only controls things outside of the main app window, like tiling, border, window top bar, etc.
Yes, part of my confusion was simply mixing up the job of the app frameworks/gui toolkits for the wm. It was weird to me that some apps like firefox had to provide wayland support by themselves and couldn't simply rely on abstraction layers from whathever they're coded in. However, I looked for some info, and found out that firefox renders some widgets on its own, and now it makes sense that they need to provide wayland support.
They are themselves abstraction layers for the apps that are made for them. Software has many levels of abstraction from what you see on the screen all the way down to hardware.
That is how portals work in Wayland.
For X there was only one protocol, so they all wrote for x.
This also allowed some hacky things to be done that are questionable from a security standpoint afaik.
If you've ever had your WM crash, then you may lose the decorations on your windows, the ability to minimize/maximize them or move them around, but the windows themselves still stick around. Restarting the WM brings that all back as well