#!/bin/sh
#---------------------------------------------
#   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.
#
#---------------------------------------------

manualpage()
{
cat << _MANUALPAGE
Name

xdg-open — opens a file or URL in the user's preferred application

Synopsis

xdg-open { file | URL }

xdg-open { --help | --manual | --version }

Description

xdg-open opens a file or URL in the user's preferred application. If a URL is
provided the URL will be opened in the user's preferred web browser. If a file
is provided the file will be opened in the preferred application for files of
that type. xdg-open supports file, ftp, http and https URLs.

xdg-open is for use inside a desktop session only. It is not recommended to use
xdg-open as root.

Options

--help
    Show command synopsis.
--manual
    Show this manualpage.
--version
    Show the xdg-utils version information.

Exit Codes

An exit code of 0 indicates success while a non-zero exit code indicates
failure. The following failure codes can be returned:

1
    Error in command line syntax.
2
    One of the files passed on the command line did not exist.
3
    A required tool could not be found.
4
    The action failed.

Examples

xdg-open 'http://www.freedesktop.org/'

Opens the Freedesktop.org website in the user's default browser

xdg-open /tmp/foobar.png

Opens the PNG image file /tmp/foobar.png in the user's default image viewing
application.

_MANUALPAGE
}

usage()
{
cat << _USAGE
xdg-open — opens a file or URL in the user's preferred application

Synopsis

xdg-open { file | URL }

xdg-open { --help | --manual | --version }

_USAGE
}

#@xdg-utils-common@

#----------------------------------------------------------------------------
#   Common utility functions included in all XDG wrapper scripts
#----------------------------------------------------------------------------

DEBUG()
{
  [ ${XDG_UTILS_DEBUG_LEVEL-0} -lt $1 ] && return 0;
  shift
  echo "$@" >&2
}

#-------------------------------------------------------------
# Exit script on successfully completing the desired operation

exit_success()
{
    if [ $# -gt 0 ]; then
        echo "$@"
        echo
    fi

    exit 0
}


#-----------------------------------------
# Exit script on malformed arguments, not enough arguments
# or missing required option.
# prints usage information

exit_failure_syntax()
{
    if [ $# -gt 0 ]; then
        echo "xdg-open: $@" >&2
        echo "Try 'xdg-open --help' for more information." >&2
    else
        usage
        echo "Use 'man xdg-open' or 'xdg-open --manual' for additional info." 
    fi

    exit 1
}

#-------------------------------------------------------------
# Exit script on missing file specified on command line

exit_failure_file_missing()
{
    if [ $# -gt 0 ]; then
        echo "xdg-open: $@" >&2
    fi

    exit 2
}

#-------------------------------------------------------------
# Exit script on failure to locate necessary tool applications

exit_failure_operation_impossible()
{
    if [ $# -gt 0 ]; then
        echo "xdg-open: $@" >&2
    fi

    exit 3
}

#-------------------------------------------------------------
# Exit script on failure returned by a tool application

exit_failure_operation_failed()
{
    if [ $# -gt 0 ]; then
        echo "xdg-open: $@" >&2
    fi

    exit 4
}


#----------------------------------------
# Checks for shared commands, e.g. --help

check_common_commands()
{
    while [ $# -gt 0 ] ; do
        parm=$1
        shift

        case $parm in
            --help)
            usage
            echo "Use 'man xdg-open' or 'xdg-open --manual' for additional info." 
            exit_success
            ;;

            --manual)
            manualpage
            exit_success
            ;;

            --version)
            echo "xdg-open 1.0beta1"
            exit_success
            ;;
        esac
    done
}

check_common_commands "$@"

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

detectDE()
{
    if [ x"$KDE_FULL_SESSION" = x"true" ]; then DE=kde;
    elif [ x"$GNOME_DESKTOP_SESSION_ID" != x"" ]; then DE=gnome;
    elif xprop -root _DT_SAVE_MODE | grep ' = \"xfce4\"$' >/dev/null 2>&1; then DE=xfce;
    fi
}

#----------------------------------------------------------------------------



open_kde()
{
    kfmclient exec "$1"

    if [ $? -eq 0 ]; then
        exit_success
    else
        exit_failure_operation_failed
    fi
}

open_gnome()
{
    gnome-open "$1"

    if [ $? -eq 0 ]; then
        exit_success
    else
        exit_failure_operation_failed
    fi
}

open_xfce()
{
    exo-open "$1"

    if [ $? -eq 0 ]; then
        exit_success
    else
        exit_failure_operation_failed
    fi
}

open_generic()
{
    IFS=":"
    for browser in $BROWSER; do
        if [ x"$browser" != x"" ]; then

            browser_with_arg=`echo "$browser" | sed s#%s#"$1"#`

            if [ x"$browser_with_arg" = x"$browser" ]; then "$browser" "$1";
            else $browser_with_arg;
            fi

            if [ $? -eq 0 ]; then exit_success;
            fi
        fi
    done

    exit_failure_operation_impossible "no method available for opening '$1'"
}

[ x"$1" != x"" ] || exit_failure_syntax

url=
while [ $# -gt 0 ] ; do
    parm=$1
    shift

    case $parm in
      -*)
        exit_failure_syntax "unexpected option '$parm'"
        ;;

      *)
        if [ -n "$url" ] ; then
            exit_failure_syntax "unexpected argument '$parm'"
        fi
        url=$parm
        ;;
    esac
done

if [ -z "${url}" ] ; then
    exit_failure_syntax "file or URL argument missing"
fi

detectDE

if [ x"$DE" = x"" ]; then
    # if BROWSER variable is not set, check some well known browsers instead
    if [ x"$BROWSER" = x"" ]; then
        BROWSER=firefox:mozilla:netscape
    fi
    DE=generic
fi

case "$DE" in
    kde)
    open_kde "$url"
    ;;

    gnome)
    open_gnome "$url"
    ;;

    generic)
    open_generic "$url"
    ;;

    *)
    exit_failure_operation_impossible "no method available for opening '$url'"
    ;;
esac