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# The Grep builtin (topbar word, `SPC f g`): `grep -R`, in-core. It arms the
# SAME tag input `/` and Find use, but the walk reads file CONTENTS under every
# pane's directory at once — minus any directory another pane's already
# contains, so a tree two panes sit in is searched ONCE and every hit appears
# once. A row is `path:LINE:COL-ENDCOL text` — the match's whole span, so
# looking it SELECTS the hit — with the path RELATIVE to the directory
# of the pane that asked — the same directory its results buffer is named in,
# so the short name resolves; only a hit from outside that tree stays absolute.
# n/N walk the rows like any other result list, and a row pointing into a file
# nothing has open yet opens it.
dirmk sub
file a.txt hello TARGET one\nnothing here\nlast TARGET line
file sub/b.txt deep\nTARGET inside sub
file noise.txt nothing to see
start 30 180 -n 3
wait 8000 a.txt
stable 700 20000
# open a.txt: a SECOND pane, whose directory the shell's cwd already covers —
# its root is dropped, which is what keeps the hits below un-duplicated
press left 5 8
release left 5 8
stable 400 5000
key i
text a.txt
key esc
settle 100
stable 400 5000
press right 6 8
release right 6 8
wait 10000 hello TARGET
stable 700 15000
snap opened
# middle-click Grep on the topbar (row 1, the word's own column): the input
# arms on the ACTIVE pane's tag, exactly where `/` would have typed
press middle 17 1
release middle 17 1
stable 400 5000
text TARGET
stable 400 5000
snap typing
# Enter walks: two hits in a.txt, one in sub/b.txt, sorted by path — and the
# file that holds none of them contributes no row
key enter
wait 10000 sub/b.txt:2:1
stable 700 15000
snap results
# n looks the first row: absolute path, line 1, columns 7..12 (`TARGET`), and
# those six cells come up selected
key n
stable 700 15000
snap first
# ...and stepping on into sub/b.txt opens the file nothing had open
key n
stable 700 15000
key n
wait 10000 TARGET inside sub
stable 700 15000
snap opened-hit
# a pattern nothing holds: an empty list of its own, n has nowhere to go.
# Armed from the LEADER, not the topbar word: the n above left the hit
# SELECTED in a.txt (a ranged result row is one a look selects), and a topbar
# execute chords whatever is selected into its argument — so a middle-click
# here would run `Grep TARGET` and never ask for a pattern at all. The leader
# path runs the builtin with no argument, which is what this step is about; the
# chord itself is the last two snaps below.
key space
key f
key g
stable 400 5000
text zzqq
key enter
stable 700 10000
key n
stable 400 5000
snap nomatch
# the acme chord: a builtin executed with a SELECTION held takes it as the
# argument, so dragging over `TARGET` in a.txt and then clicking Grep runs the
# walk on that word at once — no tag input, nothing typed. TARGET already has
# a list open from above, so this refills THAT one; only the zzqq list below is
# a second buffer, because only it is a different search.
press left 14 3
drag left 20 3
release left 20 3
stable 400 5000
snap chordsel
press middle 17 1
release middle 17 1
wait 10000 sub/b.txt:2:1
stable 700 15000
snap chord
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