scrolloff: keyboard cursor moves keep 3 context rows above/below the cursor (vim scrolloff). One reconcile in Pane.ensureCursorVisible — every keyboard path (normal-mode motions, insert entry/edits, delete/yank/paste/undo/redo) already funnels through it; mouse click/wheel untouched. Clamps: line 0 at top, EOF-at-bottom-row for files (terminals let the vt clamp at the live bottom), margin shrinks on panes shorter than 2*off+1. New scrolloff.snap golden proves j-walk scroll at the margin, gg/top-row reachability, k-walk margin, G bottom clamp. 19/19 snapshots green; no existing goldens changed.

1 files changed, 217 insertions, 0 deletions

diff --git a/test/snapshots/scrolloff.golden b/test/snapshots/scrolloff.golden
new file mode 100644
index 00000000..ed0992ad
--- /dev/null
+++ b/test/snapshots/scrolloff.golden
@@ -0,0 +1,217 @@
+== snap top grid=100x30 cursor=7,2
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|     1 line 1
+|     2 line 2                                       g.txt
+|     3 line 3
+|     4 line 4
+|     5 line 5
+|     6 line 6
+|     7 line 7
+|     8 line 8
+|     9 line 9
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
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+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap edge grid=100x30 cursor=7,7
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|     1 line 1
+|     2 line 2                                       g.txt
+|     3 line 3
+|     4 line 4
+|     5 line 5
+|     6 line 6
+|     7 line 7
+|     8 line 8
+|     9 line 9
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
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+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap scrolled1 grid=100x30 cursor=7,7
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|     2 line 2
+|     3 line 3                                       g.txt
+|     4 line 4
+|     5 line 5
+|     6 line 6
+|     7 line 7
+|     8 line 8
+|     9 line 9
+|    10 line 10
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
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+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap jdown grid=100x30 cursor=7,7
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|     6 line 6
+|     7 line 7                                       g.txt
+|     8 line 8
+|     9 line 9
+|    10 line 10
+|    11 line 11
+|    12 line 12
+|    13 line 13
+|    14 line 14
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
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+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap end grid=100x30 cursor=7,10
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|    33 line 33
+|    34 line 34                                      g.txt
+|    35 line 35
+|    36 line 36
+|    37 line 37
+|    38 line 38
+|    39 line 39
+|    40 line 40
+|    41
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+|
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap kup grid=100x30 cursor=7,5
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|    30 line 30
+|    31 line 31                                      g.txt
+|    32 line 32
+|    33 line 33
+|    34 line 34
+|    35 line 35
+|    36 line 36
+|    37 line 37
+|    38 line 38
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
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+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+== snap top2 grid=100x30 cursor=7,2
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/scrolloff/cwd/g.txt Save Del  nm /tmp/pardes-snap/scrolloff/cwd Del
+|     1 line 1
+|     2 line 2                                       g.txt
+|     3 line 3
+|     4 line 4
+|     5 line 5
+|     6 line 6
+|     7 line 7
+|     8 line 8
+|     9 line 9
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
+|
+|
+|
+|
+|
+|  nm /tmp/pardes-snap/scrolloff/cwd Del
+|
+|  g.txt
+|
+|
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+|