A workspace could show its windows only side by side. Monocle gives one
container the whole work area: the focused container is taken out of the
workspace's containers, so the layout gives no container a tile, and the next
tiling puts its window on the work area less the padding. Turning it off puts
the container back at the index it came from, and the tiles come back as they
were resized: the container keeps its resize adjustment, and the workspace does
not shorten the list of adjustments while a monocle is on.
The windows of the other containers are hidden on the parking desktop, as the
windows behind the front one of a stack are, and the front window of each is
shown again when the monocle is turned off or the window in monocle closes. A
stack in monocle stays a stack.
`komorebic toggle-monocle` turns it on and off. What focusing in a direction
does meanwhile is set with `monocle-focus-behaviour` or switched with
`toggle-monocle-focus-behaviour`: with `cycle` the monocle goes to the previous
or the next container, with `no-op`, the default, no container is on any side
and the focus falls through to the monitor on that side, where the monocle
window of its workspace, if it has one, is given the focus, and the command
fails where there is no monitor. A container that is moved to a monitor or sent
to a workspace in monocle turns that monocle off first. `cycle-focus` always
carries the monocle along. Giving the focus to another window gives it back to
the monocle window, so that it stays in front. `move` and `cycle-move` are
refused and `toggle-float` is ignored while a window is in monocle, since the
focused container is not the window in front. The monocle container is in the
state, with the index it goes back to, and a window in it that closes takes the
monocle with it.
komorebi/tests/monocle.rs drives it against the fake desktop, with one monitor
and with two. vm-core-e2e checks in a real KWin that the focused window fills
the work area, that the state has the monocle container, that toggling back
restores the tile, that the cycle behavior gives another window the work area,
and that the windows behind a monocle are parked, which a clean stop and the
next start after a crash put right; vm-stacks checks a monocle over a stack; the
vm-commands sweep runs the new commands.
LGUG2Z
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