#!/bin/sh
#
# xlogout [options] [text]
#
#    Logout button using various different programs which may or maynot
# be available on the current machine. When user presses it just quit.
# To be used as the last command in a xsession or xinitrc script.
#
# Options
#    -wm               Size it to match Anthony's WS manager (40 pixels high)
#    -g  {geometry}    Where to place the logout button (positions only)
#    -fg {color}       foreground color (for text and bitmap buttons)
#    -bg {color}       background color (for text and bitmap buttons)
#
# Any 'text' will be used instead of "Logout" if provided.
#
# For example to create a 'hold command' for a SSH network link for VNC
#    xlogout "VNC Link"
#
# Author:    Anthony Thyssen  <anthony@cit.gu.edu.au>
# Initially Created:    1 November 1994
# Re-written:           14 August 1997
#
# ---- Defaults -----
position='-5-5'                    # default position (if not given)
fg=Gold                            # bitmap/text colors
bg=Navy

icondir="$HOME/icons/appl/twm"     # Location of AIcons Library
bitmap="$icondir/logout32.xbm"     # bitmap monocrome image (not used)
pixmap="$icondir/logout32.xpm"     # pixmap color image (standard size)

# Size/Position
# to fit a ctwm window manager (40 pixel high screens - 3 pixel border)
# wm_size=`xdpyinfo |
#          sed -n 's/ *dimensions: *\([0-9]*\)x\([0-9]*\) .*/40*\1\/\2-3/pg' |
#          bc`x38
wm_size=60x40

# Is the command available?
type -t cmd_found >/dev/null ||
  cmd_found() { type -t "$1" >/dev/null; }

# ----- Option Handling -----

PROGNAME=`basename $0`
Usage() {
  echo >&2 "Usage: $PROGNAME [options] [text]"
  echo >&2 "  Start a logout button, and wait for it to be pressed"
  exit 10
}

while [ $# -gt 0 ]; do
  case "$1" in
    -v)  verbose=true ;;          # verbose
    -wm) size=$wm_size ;;         # specific Window Manager size for button
    -g)  shift;  position="$1" ;; # placement geometry
    -fg) shift;  fg="$1" ;;       # foreground color
    -bg) shift;  bg="$1" ;;       # background color
    --)  shift; break ;;          # end options
    -*)  echo "$PROGNAME: Unknown option \"$1\"" 1>&2
         Usage ;;
    *)   break ;;
  esac
  shift # next option
done
unset loop

(( $# > 1 )) && Usage "Too Many Arguments"

class="xlogout"  # I have my window manager setup NOT to decorate this class
text="${1:-Logout}"

# ----------- Show Pixmap Logout Button -----------
# This is very GOOD but can not handle a mouse button press
# and it has positioning problems.  (keypress handler is hardcoded)
# Needs the libXpm-devel package installed
#
# if  cmd_found sxpm;  then
#   [ "$verbose" ] && echo "xlogout using sxpm"
#   exec sxpm -name "$class" -title "$class" -geometry "$size$position" \
#       -xrm '*baseTranslations: #override <BtnDown>: exit(0)' \
#       "$pixmap"
# fi
#
# ----------- Bricons Logout Button -----------
# Bricons allows for the use of a color pixmap image
#
# if  cmd_found bricons;  then
#   [ "$verbose" ] && echo "xlogout using bricons"
#   tmp=/tmp/xlogout$$
#   cat >$tmp <<-EOF
#       %pixmap $pixmap
#           kill $$
#       EOF
#
#   # auto remove the above file after we have started!
#   (sleep 60; rm -f $tmp;) &
#
#   # exec to the actual logout button
#   # NOTE: You have to exec for the 'kill' in script to work
#   exec bricons -name "$class" -title "$class" \
#       -geometry "$size$position" -fg Black -bg "$bg" \
#       -default off -file $tmp  $size \
#       -xrm "*Thickness:  0"  -xrm "*borderWidth:  0" \
#       >/dev/null 2>&1
# fi

# ------- XLabel Button --------
# Graphical bitmap image -- removed due to old Xaw dependancy
# if  cmd_found xlabel;  then
#   [ "$verbose" ] && echo "xlogout using xlabel"
#   exec xlabel -name "$class" -title "$class" \
#        -g "$size$position" -bg "slategrey" -fg "black" \
#        -xrm "*bitmap: $bitmap" \
#        -xrm '*baseTranslations: #override <BtnDown>: quit()'
# fi


# ------ XMessage Logout Text Button ---------
if  cmd_found xmessage; then
  [ "$verbose" ] && echo "xlogout using xmessage"
  exec xmessage -name "$class" -title "$class" \
        -geometry $position -fg "$fg" -bg "$bg" \
        -buttons "" -xrm '*message.borderWidth: 0' \
        -xrm '*message.scrollVertical: false' \
        -xrm '*Font: -*-new cent*-bold-r-normal--24-*' \
        -xrm 'xlogout*.displayList: ' \
        -xrm 'xlogout*baseTranslations: #override <BtnDown>: exit(0)' \
        "$text"
fi

# ------- YAD Button --------
if  cmd_found yad;  then
  [ "$verbose" ] && echo "xlogout using yad"
  exec yad --title "$class" --button="$text" --geometry=$position \
           --undecorated --skip-taskbar
           #--image=gnome-logout --image-on-top \
fi

# ------- XLogo Button --------
# This is normally a last resort only but xlogo should be present...
# Start a xlogo which is pressed anywhere will exit cleanly
# This may not work on some very old X window systems.
#
if  cmd_found xlogo;  then
  [ "$verbose" ] && echo "xlogout using xlogo"
  [ -z "$size" ] && size=32x32   #fall back default size
  exec xlogo -name "$class" -title "$class" \
       -g "$size$position" -fg "$fg" -bg "$bg" \
       -xrm 'XLogo*baseTranslations: #override <BtnDown>: quit()'
fi

# ------- Zenity Notification ------
# Places itself in the panel notification area - not nice
if cmd_found zenity; then
  [ "$verbose" ] && echo "xlogout using xenity"
  exec zenity --info --text "$text"'\n(Fallback)'
fi

# ------- Emergency logout button ------
echo >&2 "xlogout: I can find anything to use as a logout button!"
echo >&2 "         Try setup a Emergency Session"
# Lets run a terminal
if  cmd_found xterm;  then
  [ "$verbose" ] && echo "xlogout using xterm"
  exec xterm -name "$class" -title "$class" -iconic \
             -geometry 80x3+5+5 -fg "$fg" -bg "$bg"
fi
# What not even xterm! Arrgghh..
if cmd_found gnome-calculator; then
  [ "$verbose" ] && echo "xlogout using gnome-calculator"
  gnome-terminal &
  exec gnome-calculator
fi

# ------- Desperation Time ------
echo >&2 "xlogout: No XTerm! ... Going into sleep loop - kill me!"
while :; do sleep 3600; done

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