#!/bin/sh

## use the windows on the desktop as screensavers by moving them randomly

. $HOME/.config/wms/wms_var 

INPUT=$1                   # input
FW=$(pfw)                  # focused window
SW=$(wattr w $(lsw -r))    # screen width
SH=$(wattr h $(lsw -r))    # screen height
WW=$((SW * 80 / 100))      # windows width = 80% of the screen
WH=$((SH * 80 / 100))      # windows height = 80% of the screen
MAXX=$((SW - WW))          # max X coordinate
MAXY=$((SH - WH))          # max Y coordinate
FREQ=20                    # refresh frequency

usage() {
    echo "usage:
wms_screensaver.sh [ -a, -f ]
-a) all windows
-f) focused window"
}

# random movement for all windowsaver
all_win() {
    while true; do
	for wid in $(lsw); do
	    x=$(shuf -i 0-$MAXX -n 1)    # random x coordinate
	    y=$(shuf -i 0-$MAXY -n 1)    # random y coordinate
	    wtp $x $y $WW $WH $wid
	done
	sleep $FREQ
    done
}

# random movement for the focused window
focused_win() {
    while true; do
	x=$(shuf -i 0-$MAXX -n 1)
	y=$(shuf -i 0-$MAXY -n 1)
	wtp $x $y $WW $WH $FW
	sleep $FREQ
    done
}

case $INPUT in
    -a)
	all_win
	;;
    -f)
	focused_win
	;;
    *)
	usage
	;;
esac