# pardes_rotate spends a two-finger twist as the search-step keys.
#
# AppKit reports rotation counterclockwise-positive and the core reads clockwise
# as `n`, so a NEGATIVE delta is the FORWARD step. That inversion is exactly the
# kind of thing a unit test on the accumulator cannot catch and a golden can:
# what the screen does is the assertion.
#
# One notch is 20 degrees (rotation_notch_degrees in src/macos.zig) and the
# remainder is banked, which makes the pair below exact rather than approximate:
# -25 spends one notch and banks -5, then +25 lands on 20 and spends one back.
start 30 100
wait 8000 New Newcol
wait 8000 $
stable 700 20000
text printf 'x MA''RK a\nzz\nx MA''RK b\nzz\nx MA''RK c\n'
key enter
wait 10000 MARK c
stable 700 10000
key c-b
stable 600 8000
# `/` types the pattern into the tag; Enter searches the pane's scrollback and
# writes the three hits into a +Search buffer, which is what n/N walk.
text /
stable 400 5000
text MARK
stable 400 5000
key enter
wait 10000 @p0:
stable 700 15000
snap results
# A gesture beginning re-zeros the dial, so travel left over from an earlier
# twist cannot make the first degree of this one jump a match.
rotate 0
# Clockwise: one notch of `n`, forward onto the first hit and selecting it.
rotate -25
stable 700 15000
snap forward
# ...and again, onto the second. Two steps out rather than one, because the
# first hit is where the list already starts: stepping BACK from it has nowhere
# to go, and a golden that cannot move is a golden that proves nothing about
# which way the dial turns.
rotate -25
stable 700 15000
snap forward2
# A new gesture, because the dial banks its remainder exactly like the scroll
# accumulator does: two 25-degree notches leave -10 behind, so reversing INSIDE
# the same twist would have to spend that first and 25 back would move nothing.
# That hysteresis is wanted — it is what stops a thumb resettling on a notch
# boundary from flip-flopping between two matches — and lifting the fingers is
# how a hand clears it.
rotate 0
# Counterclockwise: `N`. This must land back exactly on `forward`.
rotate 25
stable 700 15000
snap back
# And the other half of the contract: a twist IS the keystroke, so typing the
# key the dial claims to send must go the same way the dial went. `n` here must
# reproduce `forward2` — if the dial were sending something else, or the sign
# were inverted, these two would part company.
text n
stable 700 15000
snap forward_by_key
draw rotate