soft-wrap long lines behind a toggle

1 files changed, 54 insertions, 0 deletions

diff --git a/test/snapshots/wrap.snap b/test/snapshots/wrap.snap
new file mode 100644
index 00000000..c6e976b1
--- /dev/null
+++ b/test/snapshots/wrap.snap
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+# Soft line breaks (the Wrap builtin, `SPC t w`): a file line too long for the
+# pane renders across several body rows instead of running off the right edge.
+# OFF by default, and off it is the clipping render it has always been.
+#
+# Three rules pinned here. The break is at min(100, the pane's own content
+# width), so a narrow pane breaks at its own edge and a wide one stops at 100.
+# A continuation row carries a BLANK gutter — the number belongs to the LINE,
+# and a number repeated down a wrapped line would read as several lines. And
+# the mouse follows the render: a click on a continuation row lands on the
+# character under the pointer, which only works if the click resolves through
+# the same row->line map the body was drawn from.
+#
+# The line is 20 decades, each headed by its own column marker: `0` at column
+# 0, `4` at 40, `A` at 100. So the first character of a continuation row NAMES
+# the column it broke at, and the width rule is readable straight off the grid.
+file long.txt 0---------1---------2---------3---------4---------5---------6---------7---------8---------9---------A---------B---------C---------D---------E---------F---------G---------H---------I---------J---------\nsecond line\nthird line\n
+# 47 columns: the 2-column chrome gutter plus the 5-column line-number gutter
+# leave 40 for content, under 100, so the PANE's width is the break.
+start 14 47 long.txt
+wait 8000 New Newcol
+stable 700 20000
+# off: line 1 on ONE row, cut at the right edge, lines 2 and 3 under it
+snap off
+key space t w
+stable 400 5000
+# on: five rows for line 1 (200 bytes / 40), the four continuations gutterless
+# and starting at `4` `8` `C` `G` — the columns 40, 80, 120, 160
+snap on-narrow
+# a click on the SECOND row of line 1, on the `5` marker at column 50. The
+# cursor must come back to the cell that was clicked (grid 17,3): the click
+# resolved to line 1 column 50, and the render put line 1 column 50 back where
+# the finger was. Off by one row and it would land in line 2 instead.
+press left 18 4
+release left 18 4
+stable 400 5000
+snap clicked
+# motions stay LOGICAL: one `j` from line 1 leaves the whole wrapped line
+# behind and lands on line 2, four screen rows down at once.
+key j
+stable 400 5000
+snap logical-j
+# ...and off again is off: the same clipped body as the first snap, because
+# the map the readers consult goes back to empty and every one of them falls
+# back to the row arithmetic it used before any of this existed
+key space t w
+stable 400 5000
+snap off-again
+# 127 columns: 120 for content, so the 100 wins and the break is at the `A`
+start 14 127 long.txt
+wait 8000 New Newcol
+stable 700 20000
+key space t w
+stable 400 5000
+snap on-wide