#!/bin/sh --
###############################################################################
#
# File:         ps-preview
# RCS:          $Header: $
# Description:  Preview a Postscript File (via gv) before Printing
# Author:       Jim Randell
# Created:      Wed Dec  1 18:15:23 1999
# Modified:     Thu Jun 30 14:51:55 2005 (Jim Randell) jim@imdb.com
# Language:     Shell-script
# Package:      N/A
# Status:       Experimental
#
# (C) Copyright 1999, Jim Randell, all rights reserved.
#
###############################################################################

#
# usage: ps-preview [-2] [ps-file ...]
#

# what's ghostview called?
GV="gv"
GVARGS="--media=A4"

#GV=gnome-gv
#GVARGS=

if [ -z "$DISPLAY" ]
then
  echo "$0: can only preview in X11 (null DISPLAY)"
  exit -1
fi

if [ -z "$(type -path $GV)" ]
then
  echo "$0: can't find ghostview (gv)"
  exit -1
fi

if [ "$1" = "-2" ]
then
  if [ -n "$(type -path pstops)" ]
  then
    PSFILTER="pstops -q 2:0L@.7(21cm,0)+1L@.7(21cm,14.85cm)"
    GVARGS="$GVARGS --orientation=landscape"
  elif [ -n "$(type -path psnup)" ]
  then
    PSFILTER="psnup -2 -q"
    GVARGS="$GVARGS --orientation=landscape"
  else
    echo "$0: can't find pstops/psnup, 2-up printing disabled"
  fi
  shift
fi

TMPDIR="${TMPDIR:-/tmp}"
USER="${USER:-nobody}"

if [ $# -eq 0 ]
then
  # make a file from stdin
  PSFILE="$TMPDIR/ps-preview-$USER-$$.ps"

  # delete the output file on exit
  trap '/bin/rm -f "$PSFILE"' EXIT

  # save the output file
  cat - > "$PSFILE"

  set -- "$PSFILE"
fi

for PSFILE
do
  # run ghostview on the file
  if [ -n "$PSFILTER" ]
  then
    PS2FILE="$TMPDIR/ps-preview-filtered-$USER-$$.ps"
    $PSFILTER < "$PSFILE" > "$PS2FILE"
    $GV $GVARGS "$PS2FILE"
    /bin/rm -f "$PS2FILE"
  else
    $GV $GVARGS "$PSFILE"
  fi
done