Custom Screen Locking Script for labwc + Waybar

[python3]

Hi everyone,

I recently made the switch to a labwc + Waybar environment. While I’m enjoying the experience, I haven’t found an automatic screen locking tool that perfectly suits my needs, particularly when watching videos.

To address this, I’ve wrote a custom script. This script detects video playback and temporarily disables automatic screen locking during viewing. When no video is playing, it reverts to the standard timeout-based screen lock.

I plan to share my script code here, as it might be helpful to others with similar requirements.

In addition, I’m interested in learning if anyone knows of other screen locking tools that might better align with my specific needs. If so, I’d appreciate any recommendations. Also, if you notice any potential issues or areas for improvement in my script, please provide your feedback.

Thank you for your assistance!

#!/bin/bash

# Set the screen lock delay (seconds)
IDLE_TIMEOUT=300
SCREEN_OFF_AFTER_IDLE=320
LOCK_SCREEN_CMD="swaylock --daemonize -c 000000 --ignore-empty-password"
SCREEN_OFF_CMD="wlopm --off '*'"
SCREEN_ON_CMD="wlopm --on '*'"

swayidle_pid="" # Initialize swayidle_pid

is_media_playing() {
    playerctl status | grep -q "Playing"
    if [ $? -eq 0 ]; then
        return 0
    else
        return 1
    fi
}

start_swayidle() {
    swayidle \
        timeout "$IDLE_TIMEOUT" "$LOCK_SCREEN_CMD" \
        timeout "$SCREEN_OFF_AFTER_IDLE" "$SCREEN_OFF_CMD" \
        resume "$SCREEN_ON_CMD"  >/dev/null 2>&1 &
    swayidle_pid=$! # Get the swayidle process ID
}

kill_swayidle() {
    if [ -n "$swayidle_pid" ]; then
        echo "Stopping swayidle $swayidle_pid"
        pkill -TERM -P "$swayidle_pid" || kill -9 "$swayidle_pid" # Stop swayidle
        if [ $? -eq 0 ]; then
            wait "$swayidle_pid" 2>/dev/null # Wait for swayidle to finish
            swayidle_pid="" # Clear the swayidle process ID
        else
            echo "Failed to stop swayidle"
        fi
    fi
}

trap 'kill_swayidle' EXIT # Ensure that swayidle is stopped on script exit

while true; do
    if is_media_playing; then
        echo "Media Playing"
        kill_swayidle
    else
        if [ -z "$swayidle_pid" ]; then
            echo "Starting swayidle"
            start_swayidle
        else
            echo "Swayidle already running"
        fi
    fi
    sleep 1
done