#!/bin/sh
#
# Written by Florian Diesch <devel@florian-diesch.de> 
#
# Updates may be available at
# <http://www.florian-diesch-.de/software/shell-scripts/> 
#
# This script 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.  
# You are free to do with it what ever you want.
#
# version: 2009-11-06
#

TMPDIR=$(mktemp -d /tmp/xkcdXXXXXXXXXX)
HTML="$TMPDIR/html"
PNG="$TMPDIR/xkcd.png"

DEST="$HOME/xkcd_wallpaper.png"

wget -q -O- http://xkcd.com/|grep -E -i '<img src="http://imgs\.xkcd\.com/comics/.+?\.png"' > "$HTML"

URL=$(cut -d\" -f2 "$HTML")
TITLE=$(cut -d\" -f4 "$HTML")

wget -q -O "$PNG" "$URL"

WIDTH=$(identify -format '%w' "$PNG")

convert "$PNG"  -background '#0008' -fill white -gravity Center -pointsize 30 -size "${WIDTH}" caption:"$TITLE" -append "$DEST"

rm -r "$TMPDIR"

gconftool-2 --type str --set /desktop/gnome/background/picture_filename "$DEST"
gconftool-2 --type str --set /desktop/gnome/background/picture_options "scaled"