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).

1 files changed, 29 insertions, 29 deletions

diff --git a/test/snapshots/windowops.golden b/test/snapshots/windowops.golden
index 061ceca9..5357ac7a 100644
--- a/test/snapshots/windowops.golden
+++ b/test/snapshots/windowops.golden
@@ -215,7 +215,7 @@
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-== snap altn grid=100x30 cursor=4,23
+== snap altn grid=100x30 cursor=4,19
 |Kill Newcol Tutor Debug Colors NextColor Dump
 |  nm /tmp/pardes-snap/windowops/cwd Del   nm /tmp/pardes-snap/windowops/cwd Del
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@@ -224,21 +224,21 @@
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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@@ -246,7 +246,7 @@
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-== snap focus-left grid=100x30 cursor=4,23
+== snap focus-left grid=100x30 cursor=4,19
 |Kill Newcol Tutor Debug Colors NextColor Dump
 |  nm /tmp/pardes-snap/windowops/cwd Del   nm /tmp/pardes-snap/windowops/cwd Del
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@@ -255,21 +255,21 @@
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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@@ -277,30 +277,30 @@
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-== snap debug-on grid=100x30 cursor=4,23
+== snap debug-on grid=100x30 cursor=4,19
 |Kill Newcol Tutor Debug Colors NextColor Dump
 |  nm /tmp/pardes-snap/windowops/cwd Del   nm /tmp/pardes-snap/windowop╭────────────────────────────╮
 |                                                                      │pardes  resizes=1           │
 |  w.txt                                   w.txt                       │terms 4  cols 2             │
-|                                                                      │active #3  38x9             │
-|                                                                      │scroll 0/9                  │
+|                                                                      │active #3  38x13            │
+|                                                                      │scroll 0/13                 │
 |                                                                      │pinch  1.0000               │
 |                                                                      │tscroll  0.0000             │
-|  nm /tmp/pardes-snap/windowops/cwd Del                               ╰────────────────────────────╯
-|
-|  w.txt
+|                                                                      ╰────────────────────────────╯
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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@@ -313,23 +313,23 @@
 |1: 0-1 d,#383c54, 2-38 #969696,#2c2a3e, 39-39 d,#2c2a3e, 40-41 d,#383c54, 42-69 #969696,#2c2a3e, 70-99 d,d,
 |2: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-87 #969696,d, 88-98 d,#2a2a2a, 99-99 d,d,
 |3: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-85 #969696,d, 86-98 d,#2a2a2a, 99-99 d,d,
-|4: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-85 #969696,d, 86-98 d,#2a2a2a, 99-99 d,d,
-|5: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-80 #969696,d, 81-98 d,#2a2a2a, 99-99 d,d,
+|4: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-86 #969696,d, 87-98 d,#2a2a2a, 99-99 d,d,
+|5: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-81 #969696,d, 82-98 d,#2a2a2a, 99-99 d,d,
 |6: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-83 #969696,d, 84-98 d,#2a2a2a, 99-99 d,d,
 |7: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-70 d,d, 71-85 #969696,d, 86-98 d,#2a2a2a, 99-99 d,d,
-|8: 0-1 d,#383c54, 2-38 #969696,#2c2a3e, 39-39 d,#2c2a3e, 40-41 d,#525252, 42-99 d,d,
+|8: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |9: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |10: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |11: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
-|12: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
+|12: 0-1 d,#383c54, 2-38 #969696,#2c2a3e, 39-39 d,#2c2a3e, 40-41 d,#525252, 42-99 d,d,
 |13: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |14: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |15: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
-|16: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
+|16: 0-1 d,#6e4fd0, 2-38 #969696,#2c2a3e, 39-39 d,#2c2a3e, 40-41 d,#525252, 42-99 d,d,
 |17: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |18: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |19: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
-|20: 0-1 d,#6e4fd0, 2-38 #969696,#2c2a3e, 39-39 d,#2c2a3e, 40-41 d,#525252, 42-99 d,d,
+|20: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |21: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |22: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |23: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
@@ -339,7 +339,7 @@
 |27: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |28: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
 |29: 0-1 d,#525252, 2-39 d,d, 40-41 d,#525252, 42-99 d,d,
-== snap debug-off grid=100x30 cursor=4,23
+== snap debug-off grid=100x30 cursor=4,19
 |Kill Newcol Tutor Debug Colors NextColor Dump
 |  nm /tmp/pardes-snap/windowops/cwd Del   nm /tmp/pardes-snap/windowops/cwd Del
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@@ -348,21 +348,21 @@
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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+|  nm /tmp/pardes-snap/windowops/cwd Del
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+|  w.txt
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-|  nm /tmp/pardes-snap/windowops/cwd Del
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-|  w.txt
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