Implement dmenuxautolock.

.config/i3/layers/config.post-main-00-security

@@ -2,7 +2,8 @@
 exec_always --no-startup-id xss-lock --transfer-sleep-lock -- i3exit lock
 
 # lock screen after inactivity
-exec --no-startup-id xautolock -time $lock_after_min -locker 'loginctl lock-session' -notify $lock_notify_sec -notifier 'notify-send --icon=gtk-info xautolock "The screen will lock soon"'
+exec --no-startup-id dmenuxautolock -t $lock_after_min -n $lock_notify_sec
+bindsym $mod+Ctrl+Shift+l exec --no-startup-id dmenuxautolock -t 0 -n 0
 
 # Run i3hwlock
 exec_always --no-startup-id pgrep i3hwlock || i3hwlock

.local/bin/dmenuxautolock

@@ -0,0 +1,82 @@
+#!/bin/bash
+
+SCRIPT_NAME="$(basename -- "$0")"
+FILE="/tmp/dmenuxautolock"
+DEFAULT_TIMEOUT=60
+DEFAULT_NOTIFY=10
+
+function usage() {
+    echo "Usage: $SCRIPT_NAME [OPTIONS]"
+    echo
+    echo "Options:"
+    echo "  -h          Display help."
+    echo "  -t [MIN]    Time after which to lock the screen."
+    echo "  -n [SEC]    Notify n seconds before locking."
+}
+
+while getopts ":t:n:h" arg; do
+    case $arg in
+    t) TIMEOUT=$OPTARG ;;
+    n) NOTIFY=$OPTARG ;;
+    h)
+        usage
+        exit 0
+        ;;
+    :)
+        echo "$SCRIPT_NAME: Must supply an argument to -$OPTARG." >&2
+        usage
+        exit 1
+        ;;
+    ?)
+        echo "Invalid option: -${OPTARG}."
+        echo
+        usage
+        exit 2
+        ;;
+    esac
+done
+
+function read_current() {
+    local timeout notify
+
+    timeout="$(cut -d, -f1 2>/dev/null <"$FILE")"
+    notify="$(cut -d, -f2 2>/dev/null <"$FILE")"
+
+    [ -n "$timeout" ] && export CURRENT_TIMEOUT="$timeout"
+    [ -n "$notify" ] && export CURRENT_NOTIFY="$notify"
+}
+read_current
+
+if [ -z "$TIMEOUT" ]; then
+    [ -n "$CURRENT_TIMEOUT" ] && TIMEOUT="$CURRENT_TIMEOUT" || TIMEOUT="$DEFAULT_TIMEOUT"
+fi
+
+if [ "$TIMEOUT" -eq 0 ]; then
+    [ -n "$CURRENT_TIMEOUT" ] && current="$CURRENT_TIMEOUT" || current="$DEFAULT_TIMEOUT"
+    timeout="$(xargs -n 1 <<<"'$current min (current)' '1 min' '2 min' '5 min' '15 min' '30 min' '60 min'" | dmenu -i -l 25 -p "Lock timeout")"
+    TIMEOUT="$(cut -d' ' -f1 <<<"$timeout")"
+    [ -z "$TIMEOUT" ] && exit 1
+fi
+
+if [ -z "$NOTIFY" ]; then
+    [ -n "$CURRENT_NOTIFY" ] && NOTIFY="$CURRENT_NOTIFY" || NOTIFY="$DEFAULT_NOTIFY"
+fi
+
+if [ "$NOTIFY" -eq 0 ]; then
+    [ -n "$CURRENT_NOTIFY" ] && current="$CURRENT_NOTIFY" || current="$DEFAULT_NOTIFY"
+    notify="$(xargs -n 1 <<<"'$current sec (current)' '15 sec' '30 sec' '45 sec'" | dmenu -i -l 25 -p "Lock notify")"
+    NOTIFY="$(cut -d' ' -f1 <<<"$notify")"
+    [ -z "$NOTIFY" ] && exit 1
+fi
+
+echo "INFO: Setting TIMEOUT=$TIMEOUT, NOTIFY=$NOTIFY."
+echo "$TIMEOUT,$NOTIFY" >"$FILE"
+
+killall xautolock 2>/dev/null
+xautolock -time "$TIMEOUT" -locker 'loginctl lock-session' -notify "$NOTIFY" -notifier "notify-send --expire-time $((NOTIFY * 1000)) --icon=gtk-info xautolock 'The screen will lock soon.'" &
+xalpid=$!
+sleep 0.5
+
+if ! [ -d "/proc/${xalpid}" ]; then
+    i3-nagbar -m 'Error: xautolock failed to start!' &
+fi