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#!/bin/sh
firefox=
swaymsg -m -t subscribe '["window"]' | \
jq -r --unbuffered '.change +" "+ .container.app_id + " " + (.container.pid | tostring)' | \
grep --line-buffered '^focus ' | \
while read -r x app pid; do
#echo "# x=$x app=$app pid=$pid" >&2
if [ "$app" = 'firefox' ]; then
echo "CONT $pid" >&2
firefox=$pid
kill -CONT $pid
pkill -CONT -P $pid
elif [ -n "$firefox" ]; then
echo "STOP $firefox" >&2
pkill -STOP -P $firefox
kill -STOP $firefox
fi
done
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