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#!/bin/bash
# lightsOn.sh
 
# Copyright (c) 2011 iye.cba at gmail com
# url: https://github.com/iye/lightsOn
# This script is licensed under GNU GPL version 2.0 or above
 
# Description: Bash script that prevents the screensaver and display power
# management (DPMS) to be activated when you are watching Flash Videos
# fullscreen on Firefox and Chromium.
# Can detect mplayer and VLC when they are fullscreen too but I have disabled
# this by default.
# lightsOn.sh needs xscreensaver or kscreensaver to work.
 
# HOW TO USE: Start the script with the number of seconds you want the checks
# for fullscreen to be done. Example:
# "./lightsOn.sh 120 &" will Check every 120 seconds if Mplayer,
# VLC, Firefox or Chromium are fullscreen and delay screensaver and Power Management if so.
# You want the number of seconds to be ~10 seconds less than the time it takes
# your screensaver or Power Management to activate.
# If you don't pass an argument, the checks are done every 50 seconds.
 
 
# Set the variable `screensaver' to the screensaver you use.
# Valid options are:
# * xscreensaver (default)
# * kscreensaver (the KDE screensaver)
screensaver=kscreensaver
 
# Modify these variables if you want this script to detect if Mplayer,
# VLC or Firefox Flash Video are Fullscreen and disable
# xscreensaver/kscreensaver and PowerManagement.
mplayer_detection=1
vlc_detection=1
firefox_flash_detection=1
chromium_flash_detection=1
 
# YOU SHOULD NOT NEED TO MODIFY ANYTHING BELOW THIS LINE
 
 
 
checkFullscreen()
{
 
    #get id of active window and clean output
    activ_win_id=`xprop -root _NET_ACTIVE_WINDOW`
    activ_win_id=`echo ${activ_win_id:(-9)}`
    # Check if Active Window (the foremost window) is in fullscreen state
    isActivWinFullscreen=`xprop -id $activ_win_id | grep _NET_WM_STATE_FULLSCREEN`
        if [[ "$isActivWinFullscreen" = *NET_WM_STATE_FULLSCREEN* ]];then
            isAppRunning
            var=$?
            if [[ $var -eq 1 ]];then
                delayScreensaver
            fi
        fi
}
 
 
 
 
 
# check if active windows is mplayer, vlc or firefox
#TODO only window name in the variable activ_win_id, not whole line. 
#Then change IFs to detect more specifically the apps "<vlc>" and if process name exist
 
isAppRunning()
{    
    #Get title of active window
    activ_win_title=`xprop -id $activ_win_id | grep "WM_CLASS(STRING)"`   # I used WM_NAME(STRING) before, WM_CLASS more accurate.
 
 
 
    # Check if user want to detect Video fullscreen on Firefox, modify variable firefox_flash_detection if you dont want Firefox detection
    if [ $firefox_flash_detection == 1 ];then
        if [[ "$activ_win_title" = *unknown* ]];then   
        # Check if plugin-container process is running
            flash_process=`pgrep -l plugin-containe | grep -wc plugin-containe`
            #(why was I using this commented line avobe? delete if pgrep -lc works ok)
            #flash_process=`pgrep -lc plugin-containe`
            if [[ $flash_process -ge 1 ]];then
                return 1
            fi
        fi
    fi
 
 
    # Check if user want to detect Video fullscreen on Chromium, modify variable chromium_flash_detection if you dont want Chromium detection
    if [ $chromium_flash_detection == 1 ];then
        if [[ "$activ_win_title" = *exe* ]];then   
        # Check if Chromium Flash process is running
            flash_process=`pgrep -lfc "chromium-browser --type=plugin --plugin-path=/usr/lib/adobe-flashplugin"`
            if [[ $flash_process -ge 1 ]];then
                return 1
            fi
        fi
    fi
 
 
    #check if user want to detect mplayer fullscreen, modify variable mplayer_detection
    if [ $mplayer_detection == 1 ];then  
        if [[ "$activ_win_title" = *mplayer* || "$activ_win_title" = *MPlayer* ]];then
            #check if mplayer is running.
            #mplayer_process=`pgrep -l mplayer | grep -wc mplayer`
            mplayer_process=`pgrep -lc mplayer`
            if [ $mplayer_process -ge 1 ]; then
                return 1
            fi
        fi
    fi
 
 
    # Check if user want to detect vlc fullscreen, modify variable vlc_detection
    if [ $vlc_detection == 1 ];then  
        if [[ "$activ_win_title" = *vlc* ]];then
            #check if vlc is running.
            #vlc_process=`pgrep -l vlc | grep -wc vlc`
            vlc_process=`pgrep -lc vlc`
            if [ $vlc_process -ge 1 ]; then
                return 1
            fi
        fi
    fi    
 
 
return 0
}
 
 
delayScreensaver()
{
    # reset inactivity time counter so screensaver is not started
    if [ "$screensaver" == "kscreensaver" ]; then
    qdbus org.freedesktop.ScreenSaver /ScreenSaver SimulateUserActivity > /dev/null
    else
    xscreensaver-command -deactivate > /dev/null
    fi
 
    #Check if DPMS is on. If it is, deactivate and reactivate again. If it is not, do nothing.    
    dpmsStatus=`xset -q | grep -ce 'DPMS is Enabled'`
    if [ $dpmsStatus == 1 ];then
            xset -dpms
            xset dpms
    fi
 
}
 
 
 
delay=$1
 
 
# If argument empty, use 50 seconds as default.
if [ -z "$1" ];then
    delay=50
fi
 
 
# If argument is not integer quit.
if [[ $1 = *[^0-9]* ]]; then
    echo "The Argument "$1" is not valid, not an integer"
    echo "Please use the time in seconds you want the checks to repeat."
    echo "You want it to be ~10 seconds less than the time it takes your screensaver or DPMS to activate"
    exit 1
fi
 
 
while true
do
    checkFullscreen
    sleep $delay
done
 
 
exit 0