# THE PATH IN A TAG IS SELECTABLE, NOT EDITABLE.
# tag_col/tag_anchor index the WHOLE rendered tag (prefix ++ tail) — one
# coordinate space, no conversions: the renderer prints the cursor at tag_col
# verbatim and a mouse column IS a tag column. So motions and sweeps reach the
# path, a selection over it yanks and executes like any other text, and the
# ONLY thing fenced off is EDITING: every edit op measures from the first
# editable column (tagPrefix().len) and does nothing to the left of it.
#
# The prefix IS the path now — the mode word that used to lead it is a single
# character in the layout box — so column 0 of the tag is the path's first byte.
lines c.txt 4
start 30 100 c.txt
wait 8000 New Newcol
wait 8000 c.txt
stable 700 20000
snap start
# --- keyboard: select part of the PATH ---
# `:` parks at the tail's start (the first EDITABLE column) — unchanged, that
# is what makes `:w<Tab>` the same two keystrokes every time
key :
stable 400 5000
snap colon
# 0 goes to column 0 of the RENDERED tag: the path's leading "/", a column the
# keyboard could not name at all before
key 0
stable 400 5000
snap col0
# E: extend to the end of the long word under the cursor — the style capture
# shows ONE highlighted run over the whole path, read-only prefix though it is
key E
stable 400 5000
snap sel-path
snapstyle sel-path
# y yanks the selection. Esc hands the body back; p pastes the register into
# the file, which is the only way a snapshot can see what was yanked.
key y
key esc
settle 100
stable 400 5000
key p
stable 400 5000
snap yanked-path
# --- mouse: a sweep across the prefix/tail boundary ---
# a left press on a tagline anchors a TAG sweep (not the body's block
# selection), so the drag paints one run of the tag row. Press at col 12
# (inside the path), release at col 42 (just past "Save" in the tail): the
# highlight crosses the boundary — screen col 36, where the tail starts, four
# columns left of where it used to be — in one piece, which is the whole point
# of there being one coordinate space.
press left 12 2
drag left 30 2
drag left 42 2
release left 42 2
stable 400 5000
snap drag-cross
snapstyle drag-cross
# --- the path is inert to editing ---
# a plain click INSIDE the path leaves the cursor there (no clamp into the
# tail), in insert mode like any tag click — and then typing and backspace do
# NOTHING: the tag row below is byte-identical to the one in `yanked-path`.
press left 12 2
release left 12 2
stable 400 5000
text ZZNOPE
key bs
key bs
stable 400 5000
snap path-inert