dissimulo
7ec4c75d86
The old format nested ten #{?#{==:#{window_index},N},...} conditionals inside
window-status-format, so tmux re-evaluated all ten for every window on every
redraw -- and redraws follow PANE ACTIVITY, not status-interval. A busy pane
ran them several times a second.
tmux-window-icons stamps each window with its symbol as a window-level user
option, so the format is a plain #{?#{@icon},#{@icon},#{window_index}} lookup.
It runs from run-shell -b on window-change hooks only, never on the render path.
Deliberately NOT a #() job: those expand EMPTY while restarting, which is the
bug that made status elements wink out in the first place. Reading a pre-set
option means a slow or failed run leaves the previous icon in place instead of
blanking the field.
Hooks are limited to those tmux 3.7b actually has -- after-kill-window,
after-move-window and after-swap-window do not exist and error on source.
window-unlinked covers kills; session-window-changed catches move/swap, which
have no hook of their own.
25 lines
1.0 KiB
Bash
Executable File
25 lines
1.0 KiB
Bash
Executable File
#!/bin/bash
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# Stamp every window with its circled-number icon as a WINDOW-level user option.
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#
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# Why not do this in the format string: the obvious approach nests ten
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# #{?#{==:#{window_index},N},...} conditionals, which tmux re-evaluates for
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# every window on every redraw -- and redraws are driven by PANE ACTIVITY, so a
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# busy pane re-runs all ten per window, several times a second.
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#
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# Here the work happens ONCE per window change (driven by hooks) and the render
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# path becomes #{@icon}: a plain variable lookup, no conditionals, no forks.
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#
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# Do NOT call this from the status format itself -- that would make it a #()
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# job, which renders EMPTY while restarting and is the original bug.
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symbols=(❶ ❷ ❸ ❹ ❺ ❻ ❼ ❽ ❾ ❿)
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while IFS= read -r w; do
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idx=${w##*:}
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[[ $idx =~ ^[0-9]+$ ]] || continue
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if (( idx >= 1 && idx <= ${#symbols[@]} )); then
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icon=${symbols[idx-1]}
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else
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icon=$idx
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fi
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tmux set -w -t "$w" @icon "$icon" 2>/dev/null
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done < <(tmux list-windows -a -F '#{session_name}:#{window_index}' 2>/dev/null)
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