# a new pane never opens under a too-short parent: Alt-n from a pane too short to halve
# splits the tall sibling in its column instead; when NO pane could leave the
# newcomer 2 body rows, the tallest one anywhere is split, and when that one
# cannot keep its own tag and 2 rows either, the pane is refused
# pins the pardes placement rule (Placement pardes), which it covers
config Placement pardes
start 31 100 -n 3
stable 700 20000
# shrink pane 0 (top-left), a terminal, as far as it goes, its tag and 2 body
# rows: the pane below's grip dragged up under its tag (a terminal has no
# rule between panes; the grip is the handle)
press left 1 18
drag left 1 3
release left 1 3
motion 40 25
stable 500 8000
snap shrunk
# Alt-n from the short pane: the new shell opens below the tall sibling
# underneath it, not as another 1-row sliver
key a-n
stable 700 15000
snap swap-parent
# squeeze the grid until no pane can give a new one its tag and 2 rows, then
# Alt-n again: the new shell is refused, and the message row says why (before
# every pane had to keep only a tag and one row, the tallest pane anywhere was
# split here)
resize 6 100
stable 700 15000
key a-n
stable 700 15000
snap tallest
resize 31 100
stable 700 15000
snap regrown