Full-screen across multiple but limited number of screen ?

[inkhey]

• Description:
  My use case is that I need to have a single application full-screen across multiple "compatible" screen (we have a rectangle with all screen used by this app combined).

It's already possible to:

• do something similar with the fullscreen global option, but this mean that we can't have another screen aside with different content.
• do some crazy tricks with floating windows, windows size and border size to make seems "look like full-screen on multiple windows" but this is really fragile (we can still move the window).

This kind of use case is something that is possible using x11/i3 with xrandr software by creating a "combined screen" and map the windows to screen using i3:

# example of screen combination
xrandr --setmonitor OverlayDisplay 3840/476x2160/268+0+0 HDMI-A-0,DisplayPort-0,DVI-D-0

For now, I don't see any good solution to handle this usecase using sway. It will be great to have a solution to do so.

[emersion]

Note, we're in general not accepting any new window management features anymore. See https://github.com/swaywm/sway/blob/master/CONTRIBUTING.md#scope-of-future-changes-to-sway