This is a basic script redone using sample and understanding from the following sources
- https://github.com/KSmanis/kwin-move-window-to-center
- https://github.com/piehei/kde-plasma-center-window
- https://github.com/zgana/kwin-custom-move-resize
The Scripting API documentation is quite sparse to really understand what each bit of code does. So had to use the above sources to figure it out.
Essentially, it calculates the screen size and resizes the window and adds a margin that is calculated using the total screen area to position it back accurately in the specific screen the window existed in.
Clone this repo and run kpackagetool6 --type=KWin/Script -i <foldername>/ .
Go to Window Management -> Kwin Scripts and enable the newly installed script
Go to Shortcuts and assign a shortcut for the actions you need.
Look at contents/code/main.js to customise as per your requirements