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#!/bin/sh
#
# Set wallpaper for fluxbox.
#
# Copyright (c) 2003 Han Boetes <han@mijncomputer.nl>
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Software is furnished to do so, subject to
# the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
# IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
# TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
#
# $Id: fbsetbg,v 1.5 2003/05/12 19:52:58 fluxgen Exp $

#
# Portability notes:
# To guarantee this script works on all platforms that support fluxbox
# please keep the following restrictions in mind:
#
# don't use [ -e file ], use [ -r file ]
# don't use $(), use ``
# don't use ~, use ${HOME}
# don't use id -u, use whoami
# getopts won't work on all platforms, but the config-file can
# compensate for that.
#

wpsetters='Esetroot wmsetbg display qiv xv xsri xli xsetbg'
lastwallpaper=${HOME}/.fluxbox/lastwallpaper


WHOAMI=`whoami`
[ "$WHOAMI" = "root" ] && PATH=/bin:/usr/bin/:/usr/local/bin:/usr/X11R6/bin


# Functions
display_usage() {
    cat <<EOF
Usage: fbsetbg [ -fcta /path/to/wallpaper ] [ -l ] [ -h ] [ -d ]
EOF
}

display_help() {
    display_usage
    cat <<EOF

Options:

    -f  Set fullscreen wallpaper
    -c  Set centered wallpaper
    -t  Set tiled wallpaper
    -a  Set maximized wallpaper, preserving aspect.
        ( if your bgsetter doesn't support this
          fbsetbg falls back to -f )

    -h  Display this help

    -l  Set previous wallpaper

    -d  Debug fbsetbg
    -T  Tips

Files:

    ~/.fluxbox/lastwallpaper

EOF
}

display_tips(){
cat<<EOF

To replace all occurrences of bsetbg in a file use this command:

  perl -pi -e 's,([^f]|^)bsetbg,fbsetbg,'

If you want the style to set the wallpaper and you want fbsetbg to
remember the previous wallpaper put this in your ~/.fluxbox/init

  session.screen0.rootCommand:    fbsetbg -l


EOF
}

# ugly code for solaris compat.
find_it() {
    file=`which $1 2> /dev/null`
    if [ -x "$file" ]; then
        if [ $# -gt 1 ]; then
            shift
            $*
        fi
        return 0
    else
        return 1
    fi
}

message() {
    xmessage -center "$@"
}

remembercommand() {
    #if the $wallpaper path is absolute
    echo $option > $lastwallpaper
    case $wallpaper in
        /*) echo      $wallpaper >> $lastwallpaper ;;
        *)  echo $PWD/$wallpaper >> $lastwallpaper ;;
    esac
}

debugfbsetbg (){
    echo
    echo $debugstory
    echo
    exit 0
}

# Find the default wallpapersetter
# The precise order is up for debate.
for wpsetter in $wpsetters; do
    if find_it $wpsetter; then
        WPSETTER=$wpsetter
        break
    fi
done

standardrant="$WPSETTER sets the 'wrong' wallpaper. Transparant apps like aterm and
xchat won't work right with it. Consider using wmsetbg (from windowmaker)
or Esetroot (from Eterm)"

case $WPSETTER in
    xsri)
	full='--center-x --center-y --scale-width=100 --scale-width=100'
	tile='--tile'
	center='--center-x --center-y'
        aspect=$full
        debugstory="This is a RedHat specific app. I can't find docs about it."
        ;;
    display)        
		full="`xwininfo -root|grep geom` -window root"
        tile='-window root'
        center='-backdrop -window root'
        aspect=$full
        debugstory=$standardrant
        ;;
    Esetroot)
        full='-scale'
        tile=''
        center='-c'
        aspect='-fit'
        debugstory="Esetroot is a nice app. You won't have any problems."
        ;;
    wmsetbg)
        full='-s -S'
        tile='-t'
        center='-b black -e'
        aspect='-b black -a'
        debugstory="wmsetbg is a nice app. You won't have any problems."
        ;;
    xsetbg)
	tile='-border black'
	center='-center -border black'
        aspect='-fullscreen -border black'
	full=$aspect #broken
        debugstory="xsetbg is actually xli. The fillscreen option (-f) is broken, defaults to (-a). $standardrant"
	;;
    xli)
	tile='-onroot -quiet -border black'
	center='-center -onroot -quiet -border black'
        aspect='-fullscreen -onroot -quiet -border black'
	full=$aspect #broken
        debugstory='The fillscreen option (-f) is broken, defaults to (-a). $standardrant'
        ;;
    qiv)
        full='--root_s'
        tile='--root_t'
        center='--root'
        aspect='-m --root'
        debugstory=$standardrant
        ;;
    xv)
        full='-max -smooth -root -quit'
        tile='-root -quit'
        center='-rmode 5 -root -quit'
        aspect='-maxpect -smooth -root -quit'
        debugstory=$standardrant
        ;;
    '')
        message "I can't find an app to set the wallpaper with. You can install one in
many many ways but I will give you some simple advice: install Eterm and
you're set. Eterm provides Esetroot and thats a great wallpaper setter. I
recommend you install the package provided by your distro."
        exit 1
        ;;
esac

#Get options.
getopts ":a:f:c:t:Tdlh-" COMMAND_LINE_ARGUMENT
case "${COMMAND_LINE_ARGUMENT}" in
    d) debugfbsetbg
        exit 0
        ;;
    a) option=$aspect
        wallpaper=$OPTARG
        ;;
    f) option=$full
        wallpaper=$OPTARG
        ;;
    c) option=$center
        wallpaper=$OPTARG
        ;;
    t) option=$tile
        wallpaper=$OPTARG
        ;;
    l)
        if [ -r $lastwallpaper ];then
            option=`head -n1 $lastwallpaper`
            wallpaper=`tail -n1 $lastwallpaper`
        else
            message 'No previous wallpaper recorded.'
        fi
        ;;
    h) display_help ; exit 0 ;;
    T) display_tips ; exit 0 ;;
    -) echo "fbsetbg doesn't recognize -- gnu-longopts."
        echo 'Use fbsetbg -h for a long help message.'
        display_usage
        exit 1
        ;;
    *) if [ ! -r "$1" ]; then
           echo "$1 isn't an existing wallpaper or a valid option." >&2
           display_usage
           exit 1
       fi
       if [ -z "$1" ];then
           message 'No wallpaper to set' >&2
           display_usage
           exit 1
       fi
       ;;
esac

option=${option:=$full}
wallpaper=${wallpaper:=$1}


if [ ! -r "$wallpaper" ];then
    message "Can't find wallpaper $wallpaper"
    exit 1
fi

$WPSETTER $option "$wallpaper" || message "Something went wrong while setting the wallpaper
Run '$WPSETTER $option "$wallpaper"' from an xterm to find out what."
#remember previous wallpaper
remembercommand