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komorebi/docs/dev
LGUG2Z 21017b573f feat(wm): initial window placement rules
A window that opens goes after the focused container. A workspace can now say
another place for its windows: the primary or the secondary tile, before or
after the focused container, the end of the list, or a place by number, counting
from 1. The place is for every window, or for the windows that match a rule on
their program, app id, title or path; the rules are the conditions the ignore
and manage rules are made of, and the first that matches in key order decides. A
place that does not exist, such as the secondary tile of a workspace with one
container, is the default place.

A place is read from a name, a number or text that is a number. The
documentation of the setting shows a number and a map's keys can only be text,
and komorebi for Windows (83c4e11d) reads only text, so the form its own page
shows is refused there.

A place that was reserved with preselect-direction is used before the rules are
asked, and a locked container keeps its index. A workspace whose
window_container_behaviour is Append puts a window in the focused container, and
the rules are not used.

A workspace takes the rules from the key initial_window_placement_rules of its
entry in komorebi.json. The key is in schema.json and so in the typed config
option of the module, and the page docs/initial-window-placement-rules.md says
how to write it. vm-placement opens windows in a headless KWin and checks where
they go, by program, app id and title.

The schema that schemars derives for a place is an object with a Placement or an
Index key, which is not what is read or written, so a check against it refuses a
file that the daemon reads. The schema of PlacementTarget is written by hand
instead: a name, a number, or text that is a number. A file with a place of each
form is checked against schema.json, and the module's config option takes them.
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