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#!/bin/bash
# set ramdom wallpapers from the ones in $FVWM_USERDIR/wallpapers/*
# it follow the symlinks; but all the pictures must be in child directories
# USAGE:
# 'Exec exec random-wallpaper' will set a randdom wallpaper and exit
# 'Êxec exec random-wallpaper loop <delay>' will loop and set wallpaper at <delay> in secondes interval
# PID to kill if fvwm is interrupted
TMPFILE="/tmp/crystal_wallpaper_$$"
cleanup() {
rm "${TMPFILE}"
FvwmCommand 'UnsetEnv LOOPWP'
exit 0
}
trap cleanup INT QUIT TERM
# set random wallpaper
set_uniquewp() {
WPS=""
n=0
for i in ${FVWM_USERDIR}/wallpapers/*; do
WPS[${n}]="$i"
let n++;
done
WPS=\'$(fvwm-crystal.wallpaper "${WPS[0]}" "${WPS[1]}" "${WPS[2]}" "${WPS[3]}" "${WPS[4]}" "${WPS[5]}" "${WPS[6]}" "${WPS[7]}" "${WPS[8]}" "${WPS[9]}" "${WPS[10]}")\'
FvwmCommand "SavePreferences LastChoosenWallpaper \"Wallpaper-Set ${WPS}\""
echo $WPS
sleep 0.1
FvwmCommand 'LoadPreferences LastChoosenWallpaper'
}
# loop random wallpaper
set_loopwp() {
touch "${TMPFILE}"
while :; do
set_uniquewp
sleep $1
# fvwm is started with exec, be sure it is running
pidof fvwm 1>/dev/null || cleanup
done
}
# main program
SCRIPTID="$$"
if [[ "$1" = "loop" ]]; then
if [[ "${LOOPWP}" = "" ]]; then
FvwmCommand "SetEnv LOOPWP ${SCRIPTID}"
set_loopwp $2
else kill "${LOOPWP}" 2>/dev/null
sleep 0.5
FvwmCommand "SetEnv LOOPWP ${SCRIPTID}"
set_loopwp $2
fi
else
set_uniquewp
fi
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