www.nighost.org

#!/bin/bash
#
# grandwp - GNOME Random Wallpaper
#
# Copyright (c) 2009 HouYu Li < This e-mail address is being protected from spambots. You need JavaScript enabled to view it >
#
# When executed, it will randomly pick up a wallpaper image from the user
# defined wallpaper directory and set it as current GNOME desktop wallpaper.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.
#

USR_PROFILE=$HOME/.grandwprc
USR_WPROOT=$HOME/Pictures
IMG_PAT="*.jpg *.png *.svg"

usage()
{
cat << EOF
usage: $0 options

This script randomly pick up a wallpaper image from the user
defined wallpaper directory and set it as current GNOME desktop wallpaper.

OPTIONS:
    -h      Show this message
    -c      Configure wallpaper directory
    -s      Run silently. Using the default \$HOME/Pictures as wallpaper dir
                if not configured.
EOF
}

if [ "$#" == "0" ]
then
    usage
    exit 1
fi

OPTYPE=normal
while getopts "hcs" OPTION
do
    case $OPTION in
        h)
            usage
            exit 1
            ;;
        c)
            OPTYPE=configure
            ;;
        s)
            OPTYPE=silent
            ;;
        *)
            usage
            exit 1
            ;;
    esac
done

if [ -f $USR_PROFILE ]
then
    TMP_WPROOT=`cat $USR_PROFILE 2>/dev/null`
    if [ ! -z $TMP_WPROOT ]
    then
        USR_WPROOT=$TMP_WPROOT
    fi
fi

if [ "$OPTYPE" == "silent" ]
then
    touch $USR_PROFILE
    if [ "$?" != "0" ]
    then
        echo "Unable to create configuration file $USR_PROFILE!" >&2
        exit 1
    fi
    echo $USR_WPROOT > $USR_PROFILE
    if [ "$?" != "0" ]
    then
        echo "Unable to modify configuration file!" >&2
        exit 1
    fi
fi

if [ ! -f $USR_PROFILE ] || [ "$OPTYPE" == "configure" ]
then
    if [ ! $1 ]
    then
        echo "It seems thar you are running \"GNOME Random Wallpaper\" for the first time."
    fi
    echo "Please give me a root path where all wallpapers resides in [$USR_WPROOT]: "
    read wproot
    if [ -z $wproot ]
    then
        echo "Empty input! Using default $USR_WPROOT!"
        wproot=$USR_WPROOT
    fi
    touch $USR_PROFILE
    if [ "$?" != "0" ]
    then
        echo "Unable to create configuration file $USR_PROFILE!" >&2
        exit 1
    fi
    echo $wproot > $USR_PROFILE
    if [ "$?" != "0" ]
    then
        echo "Unable to modify configuration file!" >&2
        exit 1
    fi
fi

GCONFTOOL=`which gconftool-2`
if [ -z $GCONFTOOL ]
then
    echo "gconftool-2 not found!" >&2
    exit 1
fi

USR_WPROOT=`cat $USR_PROFILE 2>/dev/null`
cd $USR_WPROOT 2>/dev/null
if [ "$?" != "0" ]
then
    echo "Directory $USR_WPROOT does not exist!" >&2
    exit 1
fi

WPCNT=`ls $IMG_PAT 2>/dev/null | wc -l`
if [ "$WPCNT" == "0" ]
then
    echo "No files in the given directory! Exit..." >&2
    exit 1
fi

PICKED=`ls $IMG_PAT 2>/dev/null | while read f; do echo "$(expr $RANDOM % 1000):$f"; done | sort -n | sed 's/[0-9]*://' | head -n 1`

$GCONFTOOL --type string --set /desktop/gnome/background/picture_filename $USR_WPROOT/$PICKED

exit 0