From 04cd5a2b41efd6f39c3ba15c32e60843e2c6485d Mon Sep 17 00:00:00 2001
From: Gabriel Schneider <gbrls@0x4200.cafe>
Date: Mon, 6 Jul 2026 13:10:53 -0300
Subject: layout: every pane open/close resizes exactly ONE sibling — never the
 whole column. Buggy paths fixed: Alt-n inserted a weight-1 shell (whole
 column reflowed) — now splitBelow the active pane; stackDocLeft
 (file/image/tutor open with no doc yet) gave the doc a fair share (every pane
 shrank) — now it halves only the old top pane's slot; ttyForDir (execute from
 a file pane) appended a weight-1 shell to the rightmost column — now
 splitBelow its bottom pane; Alt-c moved a pane out without absorbVWeight (all
 old siblings grew) — now the sibling above absorbs first. Underneath:
 splitBelow/absorbVWeight/stackDocLeft snap the whole column's weights to
 on-screen row counts, because computeGeom's per-pane round(avail*w/vsum) let
 fractional weights jiggle bystanders by a row; evictLonePristineTty
 recomputes geometry first (a just-stacked doc has no rect). New snap tests
 layout-open + layout-close cover Alt-n, doc stacking, ttyForDir, Alt-c, tag
 Del, pty EOF, and column-width handoff. Six goldens regenerated (fileedit,
 images, look-file, syntax, tutor, windowops): they had frozen the
 fair-share/append reflow this change removes; every diff is only the
 doc/split pane sizing, with untouched panes' boundaries restored
 bit-identical (e.g. bottom pane tag back at its boot row 17 instead of pushed
 to 22).
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---
 test/snapshots/layout-close.golden | 205 +++++++++++++++++++++++++++++++++++++
 1 file changed, 205 insertions(+)
 create mode 100644 test/snapshots/layout-close.golden

(limited to 'test/snapshots/layout-close.golden')

diff --git a/test/snapshots/layout-close.golden b/test/snapshots/layout-close.golden
new file mode 100644
index 00000000..9557ec98
--- /dev/null
+++ b/test/snapshots/layout-close.golden
@@ -0,0 +1,205 @@
+== snap built grid=140x40 cursor=4,16
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/layout-close/cwd Del                              nm /tmp/pardes-snap/layout-close/cwd Del
+|
+|  marker.txt                                                            marker.txt
+|
+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+== snap altc grid=140x40 cursor=98,4
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del
+|
+|  marker.txt                                     marker.txt                                     marker.txt
+|
+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+== snap del grid=140x40 cursor=98,4
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del
+|
+|  marker.txt                                     marker.txt                                     marker.txt
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+|
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+== snap exit grid=140x40 cursor=4,7
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del
+|
+|  marker.txt                                     marker.txt                                     marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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+== snap colclose grid=140x40 cursor=4,7
+|Kill Newcol Tutor Debug Colors NextColor Dump
+|  nm /tmp/pardes-snap/layout-close/cwd Del       nm /tmp/pardes-snap/layout-close/cwd Del
+|
+|  marker.txt                                     marker.txt
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+|  nm /tmp/pardes-snap/layout-close/cwd Del
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+|  marker.txt
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-- 
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