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#!/bin/sh

# Copyright (c) 2000 LordZork Industries (lordzork@lordzork.com)
#
# 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: bsetbg,v 1.5 2003/04/28 14:44:04 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.
#


error_msg() {
    case $INFO in
        yes|y|1)
            info_msg
            ;;
    esac

    case $1 in
        1)
            cat << EOF >&2

$NAME: configuration error: $OPTION="$VALUE"
$NAME: please edit $CONFIG and provide the correct variable.
EOF
            ;;
        2)
            cat << EOF >&2

$NAME: error: couldn't execute '$APP'! tried to run fallback option $ARGUMENT
$NAME: but quit because of the following error in $CONFIG:
$NAME: $OPTION=$VALUE
$NAME: please edit $CONFIG and provide the correct variable!
EOF
            ;;
        3)
            cat << EOF >&2

$NAME: error: couldn't find any suitable image applications in the system path!
EOF
            error_msg url
            ;;
        4)
            cat << EOF >&2

$NAME: error: invalid option, or non-existent image ($ARGUMENT).
EOF
            ;;
            5)
            cat << EOF >&2

$NAME: error: the image you specified ($IMAGE) could not be found."
EOF
            ;;
            6)
            cat << EOF >&2

$NAME: error: please specify a valid image.
EOF
            ;;
            7)
            cat << EOF >&2

$NAME: error: bsetroot couldn't be found! check your fluxbox installation.
EOF
            ;;
            8)
            cat << EOF >&2

$NAME: error: wrong number of arguments!
$NAME: make sure you enclosed the options for '$APP' in double quotes.
EOF
            ;;
            nobgapp)
            cat << EOF >&2

$NAME: error: tried to run '$VALUE' for $ARGUMENT argument,
$NAME: but couldnt find '$APP' in the path! please fix the following
$NAME: line in $CONFIG to point to an existing application:
$NAME: $OPTION=\$VALUE\
EOF
            ;;
            nogrep)
            cat << EOF >&2

$NAME: error: couldn't find grep!
This script needs grep to be in your path in order to function.
You can get GNU grep from ftp://ftp.gnu.org/bin/gnu/grep/
EOF
            ;;
            url)
            cat << EOF >&2

It is suggested that you use qiv, xli (xsetbg), or xv.
You can obtain them at the following locations:

    qiv: http://www.klografx.de/software/qiv.shtml
    xli: http://pantransit.reptiles.org/prog/#xli
    xv: http://www.trilon.com/xv/downloads.html

The above URLs are current as of 05/23/2000.
EOF
            ;;
    esac
    exit 1
}


help_msg() {
cat << EOF
$NAME $VERSION: $MORE
options:

  (none)                             image is set using default values

  -full, -f                          image is set fullscreen
  -tile, -t                          image is set tiled
  -center, -c                        image is set centered

  -last, -l                          last used image is set

  -app, -a <application>             image is set using <application> with
     <'application options'>            single-quote-enclosed options and
     -center, -c|-tile, -t|-full, -f    default fallback option

  -display <string>                  display to connect to (bsetroot only)

  -mod <x> <y>                       sets bsetroot modula pattern
     -foreground, -fg <color>           modula foreground color
     -background, -bg <color>           modula background color

  -gradient <texture>                sets bsetroot gradient texture
     -from <color>                      gradient start color
     -to   <color>                      gradient end color

  -solid <color>                     sets bsetroot solid color

  -version, -v                       outputs $NAME's version number
  -info, -i                          outputs configuration info
  -help, -h                          this message

usage: <options...> <image>
EOF
    exit 0
}


info_msg() {
    case $ERROR in
	[1-3])
	    SUMMARY="error: some variables are blank"
	    ;;
	4)
	    SUMMARY="no values have been specified"
	    ;;
 	0)
	    SUMMARY="looks good"
            ;;
    esac

    case $APP_ERROR in
        [1-4])
	    SUMMARY="error: some applications couldn't be found!"
            ;;
    esac

    case `which bsetroot 2>&1` in
	*/*bsetroot)
	    BSETROOT=`which bsetroot`
	    ;;
	*)
	    BSETROOT="(error: not found)"
	    case $ERROR in
		1-4)
		    SUMMARY="$SUMMARY, and bsetroot does not seem to be present."
		    ;;
		*)
		    SUMMARY="$SUMMARY, but bsetroot does not seem to be present."
                    ;;
	    esac
            ;;
    esac
cat << EOF
$NAME $VERSION configuration:

  bsetroot:                          $BSETROOT

  reading configuration from:        $CONFIG

  configuration values:

EOF
    case $FULL_BGAPP_MSG in
	*'not found')
	    echo "      fullscreen (ERROR):            $FULL_BGAPP_MSG"
	    ;;
	*)
	    echo "      fullscreen (FULL):             $FULL_MSG"
            ;;
    esac

    echo

    case $TILE_BGAPP_MSG in
	*'not found')
	    echo "      tiled (ERROR):                 $TILE_BGAPP_MSG"
	    ;;
	*)
	    echo "      tiled (TILE):                  $TILE_MSG"
            ;;
    esac

    echo

    case $CENTER_BGAPP_MSG in
	*'not found')
	    echo "      centered (ERROR):              $CENTER_BGAPP_MSG"
	    ;;
	*)
	    echo "      centered (CENTER):             $CENTER_MSG"
            ;;
    esac

    echo

    case $DEFAULT_BGAPP_MSG in
	*'not found')
	    echo "      default (ERROR):               $DEFAULT_BGAPP_MSG"
	    ;;
	*)
	    echo "      default (DEFAULT):             $DEFAULT_MSG"
            ;;
    esac
    echo
    echo "  summary: $SUMMARY"
    exit 0
}


find_app() {
    APP_PATH=`which $1 2>&1`
    case $APP_PATH in
	*/*$1)
	    echo "$NAME: checking for $1... $APP_PATH"
            cat << EOF >> $TMPFILE
### $app
# FULL="$full"
# TILE="$tile"
# CENTER="$center"
# DEFAULT="$default"

EOF
	    FULL=$full
	    TILE=$tile
	    CENTER=$center
	    DEFAULT=$default
	    APP=$app
	    ;;
	*)
	    echo "$NAME: checking for $1... not found."
            ;;
    esac
}

search_xsri() {
    full='xsri --scale-width=100 --scale-width=100'
    tile='xsri --tile'
    center='xsri --center-x --center-y'
    default=$center
    find_app xsri
}

search_display() {
    full='display -geometry 800x600 -window root'
    tile='display -window root'
    center='display -backdrop -window root'
    default=$center
    find_app display
}

search_Esetroot() {
    full='Esetroot -scale'
    tile='Esetroot'
    center='Esetroot -c'
    default=$center
    find_app Esetroot
}

search_wmsetbg() {
    full='wmsetbg -s -S'
    tile='wmsetbg -t'
    center='wmsetbg -e'
    default=$center
    find_app wmsetbg
}

search_xli() {
    case `which xsetbg 2>&1` in
	*/*xsetbg)
	    full='xsetbg -fillscreen'
	    tile='xsetbg'
	    center='xsetbg -center'
	    default=$center
	    app='xsetbg (xli)'
	    find_app xsetbg
	    ;;
	*)
	    case `which xli 2>&1` in
                */*xli)
		    full='xli -fillscreen -onroot -quiet'
		    tile='xli -onroot -quiet'
		    center='xli -center -onroot quiet'
		    default=$center
		    app=xli
		    find_app xli
                    ;;
	    esac
            ;;
    esac
}

search_qiv() {
    full='qiv --root_s'
    tile='qiv --root_t'
    center='qiv --root'
    default=$center
    find_app qiv
}

search_xv() {
    full='xv -max -smooth -root -quit'
    tile='xv -root -quit'
    center='xv -rmode 5 -root -quit'
    default=$center
    find_app xv
}


rm_tmpfiles() {
    [ -f $TMPFILE ] && rm -f $TMPFILE
}


create_config() {
    trap rm_tmpfiles INT QUIT STOP TERM
    case `whoami` in root)
	    if [ ! "$ARGUMENT" = "-r" ]; then
                cat << EOF >&2

$NAME: Running X as root is a security hazard, and is NOT a good idea!
$NAME: If you insist upon having a ~/.fluxbox/bsetbg for root, run bsetbg with
$NAME: the '-r' flag to force its creation. You have been warned!
$NAME: And you will be warned again and again and again. Don't you get it yet?
$NAME: DON'T DO IT!!!
EOF
	        exit 1
	    fi
            ;;
    esac

    case $ARGUMENT in
	-r)
	    echo "$NAME: creating configuration for root (BAD IDEA)..."
	    ;;
	*)
	    echo "$NAME: $CONFIG not found, creating..."
            ;;
    esac

    rm_tmpfiles

    for app in $IMAGE_APPS; do
	search_$app
    done

    if [ -z "$FULL" -o -z "$TILE" -o -z "$CENTER" ]; then
	rm -f $TMPFILE
	unset INFO
        error_msg 3
    fi

    if [ ! -d ${HOME}/.fluxbox ]; then
    	mkdir ${HOME}/.fluxbox
    fi

    cat << EOF > ${CONFIG}

# $CONFIG
#
# Automagically generated with loving care by $NAME $VERSION on `date`
#
# Uncomment the set below that corresponds to your favorite root-image
# application, or mix and match to suit your pleasure.
#
# xli misbehaves under larger screen resolutions when using the -fullscreen
# option. use -fullscreen if your resolution is higher than 1024x768.
#


### $APP
FULL="$FULL"
TILE="$TILE"
CENTER="$CENTER"
DEFAULT="$DEFAULT"

EOF

    grep -v ${APP} ${TMPFILE} >> ${CONFIG}

    rm -f $TMPFILE

    if [ -f $CONFIG ]; then
	echo "$NAME: default configuration was created in $CONFIG."
    else
	echo "ERROR: $CONFIG not found!"
        exit 1
    fi
}

check_config_apps() {
    BGAPP=$1
    APP_PATH=`which $BGAPP 2>&1`
    case ${APP_PATH} in
	*/*$BGAPP)
	    BGAPP_MSG="$APP_PATH"
	    ;;
	*)
	    BGAPP_MSG="$BGAPP: not found"
	    APP_ERROR=`expr $APP_ERROR + 1`
            ;;
    esac
}


check_config_vars() {
    ERROR=0
    APP_ERROR=0

    case $FB_ARG in
	$FULL)
	    if [ -z "$FULL" ]; then
		FULL_MSG="(no value)"
		ERROR=`expr $ERROR + 1`
	    else
		check_config_apps $FULL
		FULL_BGAPP_MSG=$BGAPP_MSG
		FULL_BGAPP=$BGAPP
		FULL_MSG="$FULL"
	    fi
	    ;;
	$TILE)
	    if [ -z "$TILE" ]; then
		TILE_MSG="(no value)"
		ERROR=`expr $ERROR + 1`
	    else
		check_config_apps $TILE
		TILE_BGAPP_MSG=$BGAPP_MSG
		TILE_BGAPP=$BGAPP
		TILE_MSG="$TILE"
	    fi
	    ;;
	$CENTER)
	    if [ -z "$CENTER" ]; then
		CENTER_MSG="(no value)"
		ERROR=`expr $ERROR + 1`
	    else
		check_config_apps $CENTER
		CENTER_BGAPP_MSG=$BGAPP_MSG
		CENTER_BGAPP=$BGAPP
		CENTER_MSG="$CENTER"
	    fi
	    ;;
	*)
	    if [ -z "$DEFAULT" ]; then
		DEFAULT_MSG="(no value)"
		ERROR=`expr $ERROR + 1`
	    else
		check_config_apps $DEFAULT
		DEFAULT_BGAPP_MSG=$BGAPP_MSG
		DEFAULT_BGAPP=$BGAPP
		DEFAULT_MSG="$DEFAULT"
	    fi
	    ;;
    esac
}


final_error_check() {
    case $ARGUMENT in
	*full|-f|c)
	    OPTION=FULL
	    VALUE=$FULL_MSG
	    FB_ARG=$FULL
	    case $FULL_BGAPP_MSG in
                *'not found')
		    APP=$FULL_BGAPP
		    error_msg nobgapp
                    ;;
	    esac
	    ;;
	*tile|-t|t)
	    OPTION=TILE
	    VALUE=$TILE_MSG
	    FB_ARG=$TILE
	    case $TILE_BGAPP_MSG in
                *'not found')
		    APP=$TILE_BGAPP
		    error_msg nobgapp
                    ;;
	    esac
	    ;;
	*center|-c|c)
	    OPTION=CENTER
	    VALUE=$CENTER_MSG
	    FB_ARG=$CENTER
	    case $CENTER_BGAPP_MSG in
                *'not found')
		    APP=$CENTER_BGAPP
		    error_msg nobgapp
                    ;;
	    esac
	    ;;
        *last|-l|l)
            OPTION=DEFAULT
            VALUE=$DEFAULT_MSG
            FB_ARG=$DEFAULT
            ARGUMENT=default
            case $DEFAULT_BGAPP_MSG in
                *'not found')
                    APP=$DEFAULT_BGAPP
                    error_msg nobgapp
                    ;;
            esac
            ;;
	*)
	    OPTION=DEFAULT
	    VALUE=$DEFAULT_MSG
	    FB_ARG=$DEFAULT
	    ARGUMENT=default
	    case $DEFAULT_BGAPP_MSG in
                *'not found')
		    APP=$DEFAULT_BGAPP
		    error_msg nobgapp
                    ;;
	    esac

	    if [ ! "$IMAGE_EXISTS" = yes ]; then
	        error_msg 4; fi
            ;;
    esac

    case $VALUE in
        '(no value)')
            if [ -n "$APP" ]; then
	        error_msg 2
	    else
	        error_msg 1
	    fi
            ;;
    esac
}


check_config() {
    if [ ! -f $CONFIG ]; then
	create_config
    fi

    . $CONFIG
    check_old_config
    final_error_check
    check_config_vars
}


check_image() {
    case "$IMAGE" in
	*~/*)
	    IMAGE="$HOME/`basename $IMAGE`"
            ;;
    esac

    case $NOARG in
	yes|y|1)
	    NUM=4
	    ;;
	*)
	    if [ -n "$IMAGE" ]; then
		NUM=5
	    else
		NUM=6
	    fi
	    case $IMAGE in
                $ARGUMENT|'.'|'./')
	            error_msg 6
                    ;;
	    esac
    esac

    if [ ! -r "$IMAGE" ]; then
	error_msg $NUM
    else
	IMAGE_EXISTS=yes
    fi
}


exec_app() {
    case `which $APP 2>&1` in
	*/*$APP)
	    check_image
	    final_error_check
	    exec $APP $ARGS "$IMAGE"
	    ;;
	*)
	    check_image
	    check_config
	    exec $FB_ARG "$IMAGE"
            ;;
    esac
}


check_bsetroot_args() {
    case $1 in
	-mod)
	    ARGS="$1 $2 $3 $4 $5 $6 $7"
	    ;;
        -gradient)
	    ARGS="$1 $2 $3 $4 $5 $6"
	    ;;
        -solid)
	    ARGS="$1 $2"
            ;;
    esac
}


exec_bsetroot() {
    case `which bsetroot 2>&1` in
        */*bsetroot)
	    exec bsetroot $ARGS
	    ;;
        *)
	    error_msg 7
            ;;
    esac
}


check_old_config() {
    if [ -f $CONFIG ]; then
	if [ -n "$BGAPP"      -o -n "$CENTER_ARGS" -o \
             -n "$TILED_ARGS" -o -n "$OTHER_ARGS"  -o \
             -n "$DEFAULT_ARGS" ]; then
            cat << EOF >&2
This version of $NAME ($VERSION) no longer uses the old configuration format."
Please update $CONFIG with the new syntax:"

CENTER="value"
FULL="value"
TILE="value"
DEFAULT="value"

Look at the sample.config file for details.
EOF
            exit 1
	fi
    fi
}


debug() {
cat << EOF
DEBUG:--------------------------
config:    $CONFIG
full:      $FULL
tile:      $TILE
center:    $CENTER
default:   $DEFAULT
error:     $ERROR
app error: $APP_ERROR
argument:  $ARGUMENT
________________________________
EOF
}

IMAGE_APPS="display Esetroot wmsetbg xv xli qiv xsri"
CONFIG="$HOME/.fluxbox/bsetbg"
LASTIMAGEFILE="$HOME/.fluxbox/bsetbg.lastimage"
NAME=`basename $0`
VERSION=1.13
MORE='(C) 2000 by lordzork industries (http://lordzork.com/)'
PATH=$PATH:/usr/bin:/usr/local/bin:/usr/X11R6/bin:/usr/X11/bin
TMPFILE=$CONFIG.tmp
ARGUMENT=$1

which grep  > /dev/null 2> /dev/null || error_msg nogrep

case $1 in
    *-full|-f|f)
        check_config
        IMAGE=$2
        check_image
        echo -e "full\n$IMAGE" > $LASTIMAGEFILE
        exec $FULL "$IMAGE"
        ;;
    *-tile|*tiled|-t|t)
        check_config
        IMAGE=$2
        check_image
        echo -e "tile\n$IMAGE" > $LASTIMAGEFILE
        exec $TILE "$IMAGE"
        ;;
    *-center|-c|c)
        check_config
        IMAGE=$2
        check_image
        echo -e "center\n$IMAGE" > $LASTIMAGEFILE
        exec $CENTER "$IMAGE"
        ;;
    *-last|-l|l)
        check_config
        LASTACTION="`head -n 1 $LASTIMAGEFILE 2> /dev/null`"
        IMAGE="`tail -n 1 $LASTIMAGEFILE 2> /dev/null`" && check_image
        ACTION=$DEFAULT
        case "$LASTACTION" in
            full)   ACTION=$FULL ;;
            tile)   ACTION=$TILE ;;
            center) ACTION=$CENTER ;;
            *)  echo "Error: $LASTIMAGEFILE is kaputt" >&2
                exit 1
                ;;
        esac
        exec $ACTION "$IMAGE"
        ;;
    *-app|-a|a)
        APP=$2
        ARGS="$3"
        case $# in
            4)
                ARGUMENT=$3
                IMAGE=$4
                exec_app
                ;;
            5)
                COMMAND=`shift && echo $*`
                ARGUMENT=$4
                IMAGE=$5
                exec_app
                ;;
            *)
                error_msg 8
                ;;
        esac
        ;;
    -mod|-gradient|-solid)
        check_bsetroot_args $*
        exec_bsetroot
        ;;
    -display)
        shift 1 && check_bsetroot_args $*
        ARGS="-display $ARGS"
        exec_bsetroot
        ;;
    *-info|-i|i)
        INFO=yes
        check_config
        info_msg
        ;;
    *-version|-v|v)
        cat << EOF

$NAME version $VERSION
$MORE
EOF
        ;;
    *-help|-h|h)
        help_msg
        ;;
    -r)
        case `whoami` in
            root)
                if [ -f $CONFIG ]; then
                    echo 'Error: Config already exists' >&2
                    exit 1
                else
                    create_config
                fi
                ;;
            *)
                echo 'Error: -r is for creating a config for root and your are not root' >&2
                exit 1
        esac
        ;;
    *)
        if [ -n "$1" ]; then
            NOARG=yes
            IMAGE=$1
            check_image
            check_config && final_error_check
            echo -e "default\n$IMAGE" > $LASTIMAGEFILE
            exec $DEFAULT "$1"
        else
            if [ ! -f $CONFIG ]; then
                create_config
            fi
            help_msg
        fi
        ;;
esac