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Shawn Pana
5dd81430a9
Option+O used to cycle tmux's built-in layouts. It now runs a smart-layout script that scores even-horizontal, even-vertical, and tiled by how close each one puts the per-pane aspect to a 2:1 cell target (roughly square in pixels) and applies the winner. A wide window with four panes becomes a single horizontal row instead of a squished 2x2; a tall narrow window becomes a vertical stack. The old layout-cycling behavior is preserved on Option+P for anyone who wants to hand-pick. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
36 lines
1.1 KiB
Bash
Executable File
36 lines
1.1 KiB
Bash
Executable File
#!/usr/bin/env bash
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# Pick the tmux layout that makes panes closest to a "nice" shape (target
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# aspect = 2 cells wide : 1 cell tall, which renders roughly square in
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# pixels). Considers even-horizontal, even-vertical, and tiled; applies the
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# one with the lowest aspect error. Usage: smart-layout [<pane_id>]
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set -u
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TGT="${1:-}"
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read -r N W H <<<"$(
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tmux display-message -p ${TGT:+-t "$TGT"} '#{window_panes} #{window_width} #{window_height}' 2>/dev/null
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)"
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[ -z "${N:-}" ] && exit 0
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[ "$N" -le 1 ] && exit 0
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LAYOUT=$(awk -v n="$N" -v w="$W" -v h="$H" 'BEGIN {
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target = 2.0
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tc = int(sqrt(n)); if (tc*tc < n) tc++
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tr = int(n/tc); if (tc*tr < n) tr++
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split("even-horizontal even-vertical tiled", names, " ")
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cols[1] = n; rows[1] = 1
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cols[2] = 1; rows[2] = n
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cols[3] = tc; rows[3] = tr
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best_name = "tiled"; best_err = 1e9
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for (i = 1; i <= 3; i++) {
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a = (w/cols[i]) / (h/rows[i])
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err = (a > target) ? a/target : target/a
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if (err < best_err) { best_err = err; best_name = names[i] }
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}
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print best_name
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}')
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tmux select-layout ${TGT:+-t "$TGT"} "$LAYOUT"
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