a2ps/a2ps-open

#!/bin/bash
#
#   a2ps-open based on xdg-open, see below
#
#   The changes are
#   Copyright 2009, Werner Fink <werner@suse.de>
#
#---------------------------------------------
#   xdg-open
#
#   Utility script to open a URL in the registered default application.
#
#   Refer to the usage() function below for usage.
#
#   Copyright 2006, Kevin Krammer <kevin.krammer@gmx.at>
#   Copyright 2006, Jeremy White <jwhite@codeweavers.com>
#
#   LICENSE:
#
#   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.
#
#---------------------------------------------

#--------------------------------------
# Checks for known desktop environments
# set variable DE to the desktop environments name, lowercase

DE=generic
detectDE()
{
    if test "$KDE_FULL_SESSION" = "true" ; then DE=kde;
    elif test -n "$GNOME_DESKTOP_SESSION_ID" ; then DE=gnome;
    elif xprop -root _DT_SAVE_MODE | grep ' = \"xfce4\"$' &>/dev/null ; then DE=xfce;
    fi
    case "$DE" in
    kde)    ;;
    gnome)  type -p kioclient &>/dev/null || DE=generic ;;
    xfce)   type -p exo-open &>/dev/null || DE=generic ;;
    esac
}

#----------------------------------------------------------------------------
# kfmclient exec/openURL can give bogus exit value in KDE <= 3.5.4
# It also always returns 1 in KDE 3.4 and earlier
# Simply return 0 in such case

kfmclient_fix_exit_code()
{
    local -i major minor release
    local IFS
    IFS=.
    read -t 1 major minor release < <(kde-config --version 2>/dev/null |
	sed -nr '/^KDE:/ {s/KDE:[[:blank:]]+([0-9]*\.[0-9]+\.[0-9]*).+/\1/p;}')
    ((major > 3))   && return $1
    ((minor > 5))   && return $1
    ((release > 4)) && return $1
    return 0
}

open_kde()
{
    if type -p kioclient &>/dev/null ; then
	kioclient exec ${1+"$@"}
    else
	kfmclient exec ${1+"$@"}
	kfmclient_fix_exit_code $?
    fi
    test $? -eq 0 || exit 1
}

open_gnome()
{
    gnome-open ${1+"$@"}
    test $? -eq 0 || exit 1
}

open_xfce()
{
    exo-open ${1+"$@"}
    test $? -eq 0 || exit 1
}

open_generic()
{
    gv ${1+"$@"}
    test $? -eq 0 || exit 1
}

detectDE

GS_DEVICE=x11alpha
GS_OPTIONS=-dNOPLATFONTS
export GS_DEVICE GS_OPTIONS
case "$DE" in
    kde)    open_kde	    ${1+"$@"} ;;
    gnome)  open_gnome	    ${1+"$@"} ;;
    xfce)   open_xfce	    ${1+"$@"} ;;
    *)	    open_generic    ${1+"$@"}
esac