File urlsee of Package freemind

#!/bin/sh
# Small wrapper script around 'see' and some other commands in order to be
# able to handle URLs.
# Use the environment variables SEECMD, BROWSER, MAILER and FILEMGR
# to control which commands are used per preference respectively for local
# files, remote URLs, mailto URLs or local files URLs (i.e. file:/).
# (c) Eric Lavarde 2005, placed under GPLv2 license

if [ -n "${DEBUG}" ]
then # due to the fact that FreeMind discards any output.
        exec >${TMPDIR:=/tmp}/urlsee.log 2>&1
fi

_debug() {
	if [ -n "${DEBUG}" ]
	then
		echo "DEBUG:   $1" >&2 
		shift
		for text in "$@"
		do
			echo "         ${text}" >&2
		done
	fi
}

_error() {
	echo "ERROR:   $1" >&2
	shift
	for text in "$@"
	do
		echo "         ${text}" >&2
	done
}

try_all_cmds() {
	local file cmd
	file="$1"
	shift
	for cmd in "${@}"
	do
		cmd=$(which "${cmd}")
		if [ -x "${cmd}" ]
		then
			_debug "CALLING ${cmd}" "${file}"
			exec "${cmd}" "${file}"
		fi
	done
}

if [ -z "$1" ]
then
	_error "Parameter missing." "Usage: $0 <URL or filename>"
	exit 1
else
	FILENAME="$1"
fi

### we start with the most generic and portable possibility ###
if [ -x "$(which xdg-open)" ]
then
	_debug "exec xdg-open ${FILENAME}"
	exec xdg-open "${FILENAME}"
fi

### if this wasn't possible, we try with desktop specific commands ###

# try KDE with kfmclient
if [ "${DESKTOP_SESSION}" = "kde" ] && [ -x "$(which kfmclient)" ]
then
	_debug "CALLING KDE kfmclient exec ${FILENAME}"
	exec kfmclient exec "${FILENAME}"
fi

# try GNOME with gnome-open
if [ "${DESKTOP_SESSION}" = "gnome" ] && [ -x "$(which gnome-open)" ]
then
	_debug "CALLING GNOME gnome-open ${FILENAME}"
	exec gnome-open "${FILENAME}"
fi

# try XFce with exo-open
if [ "${DESKTOP_SESSION}" = "xfc4" ] && [ -x "$(which exo-open)" ]
then
	_debug "CALLING XFce4 exo-open ${FILENAME}"
	exec exo-open "${FILENAME}"
fi

### Looks like we're not using one of the standard desktops, ###
### so we just try the same commands without caring for env. ###
try_all_cmds "${FILENAME}" gnome-open exo-open
if [ -x "$(which kfmclient)" ]
then # we can't use try_all_cmds because we have 2 parameters
	_debug "CALLING kfmclient exec ${FILENAME}"
	exec kfmclient exec "${FILENAME}"
fi

### And now, we need to go the messy way ###
### I might remove this part in the future ###
_debug "Going for the messy path, it might fail..."

HTTPNAME=${FILENAME#*://} # covers all kind of url protocol
MAILNAME=${FILENAME#mailto:} # covers only mailto addresses
LOCALNAME=${FILENAME#file:/} # covers only local files URL
if [ "${FILENAME}" != "${HTTPNAME}" ] && [ "${FILENAME}" = "${LOCALNAME}" ] \
	&& [ "${FILENAME}" = "${MAILNAME}" ]
then # FILENAME did start with an URL protocol not equal to file: or mailto:
	try_all_cmds "${FILENAME}" ${BROWSER} sensible-browser \
		mozilla konqueror galeon firefox
	_error "No browser could be found. Exiting."
	exit 1
fi

if [ "${FILENAME}" != "${MAILNAME}" ]
then # FILENAME did start with mailto:
	try_all_cmds "${FILENAME}" ${MAILER} mozilla konqueror thunderbird
	_error "No mailer could be found. Exiting."
	exit 1
fi

if [ "${LOCALNAME}" != "${FILENAME}" ]
then # FILENAME did start with file:/ # %20 is the URL expression of blanks
	LOCALNAME=$(echo "/${LOCALNAME}" | sed 's/%20/ /g')
fi

# first try commands that work best with local names
try_all_cmds "${LOCALNAME}" ${SEECMD} see

# then try commands that work best with file:/ names
try_all_cmds "${FILENAME}" ${FILEMGR} konqueror nautilus \
	${BROWSER} sensible-browser mozilla galeon firefox

_error "No file manager could be found. Exiting."
exit 1