#!/bin/bash

# Based on https://github.com/iye/lightsOn
# needed tools xprop, xdotool. xvinfo, kde4 & firefox :)
# copy this script to ~/.kde4/Autostart

displays=""
while read id
do
    displays="$displays $id"
done < <(xvinfo | sed -n 's/^screen #\([0-9]\+\)$/\1/p')

checkFullscreen()
{
    for display in $displays
    do
        plugin_win_id=`DISPLAY=:0.${display} xdotool search --onlyvisible --class plugin-container`
        if [ -n "$plugin_win_id" ]; then
            isPluginWinFullscreen=`DISPLAY=:0.${display} xprop -id $plugin_win_id _NET_WM_STATE | grep _NET_WM_STATE_FULLSCREEN`
        else
            isPluginWinFullscreen=""
        fi

        if [[ "$isPluginWinFullscreen" != *NET_WM_STATE_FULLSCREEN* ]]; then
            plugin_win_id=`DISPLAY=:0.${display} xprop -root _NET_ACTIVE_WINDOW`
            plugin_win_id=${plugin_win_id:40:9}
            isPluginWinFullscreen=`DISPLAY=:0.${display} xprop -id $plugin_win_id _NET_WM_STATE | grep _NET_WM_STATE_FULLSCREEN`
        fi

        if [[ "$isPluginWinFullscreen" = *NET_WM_STATE_FULLSCREEN* ]]; then
            isAppRunning
            var=$?
            if [[ $var -eq 1 ]]; then
                delayScreensaver
            fi
        fi
    done
}

isAppRunning()
{
    plugin_win_title=`xprop -id $plugin_win_id | grep "WM_CLASS(STRING)"`
    if [[ "$plugin_win_title" = *unknown* || "$plugin_win_title" = *plugin-container* ]]; then
        flash_process=`pgrep -l plugin-containe | grep -wc plugin-containe`
        if [[ $flash_process -ge 1 ]]; then
            return 1
        fi
    fi
    return 0
}

delayScreensaver()
{
    echo "Simulating activity"
    qdbus org.freedesktop.ScreenSaver /ScreenSaver SimulateUserActivity > /dev/null
    dpmsStatus=`xset -q | grep -ce 'DPMS is Enabled'`
    if [ $dpmsStatus == 1 ]; then
        xset -dpms
        xset dpms
    fi
}

delay=$1
if [ -z "$delay" ]; then
    delay=30
fi

if [[ $delay = *[^0-9]* ]]; then
    echo "The Argument \"$delay\" 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

app=`basename $0`
app_pid=`pgrep -f $app`
app_pid=${app_pid//$$/}
if [[ $app_pid -ge 1 ]]; then
    echo "Already Runnin"
    exit 0
fi

while true
do
    checkFullscreen
    sleep $delay
done

exit 0