#!/bin/sh
##
## Nautilus
## SCRIPT: 00_1pdfFile_MAKE-PAGE-IMAGES_INppmFiles_1ppmPerPAGE_pdftoppm.sh
##
## PURPOSE: Runs the 'pdftoppm' command to make '.ppm' image files ---
##          one for each page of a user-selected PDF file.
##
## METHOD:  The user is put in view mode of the first PPM file, using
##          an image viewer specified at the bottom of this script.
##
## HOW TO USE: In Nautilus, navigate to a PDF file, select it,
##             right-click and choose this Nautilus script to run.
##
## WARNING: If there are hundreds of pages in the PDF file,
##          'pdftoppm' will generate several hundred image files.
##          If that proves to be a problem often, we can make a
##          temporary directory in which to put the page-images ---
##          so that we do not junk-up the current directory.
##
##          Also, note that it may take about 2 seconds to make each PPM file,
##          so for a PDF containing about 100 pages, it may take about 3 minutes
##          to make all of the PPMs. You can keep refreshing the Nautilus
##          directory (with the Reload 'button' in the middle of the Nautilus
##          tool bar) to see the PPMs popping up as they are created.
##
###########################################################################
## Created: 2010may12
## Changed: 2011may02 Added $USER to a temp filename.
## Changed: 2012may11 Changed script name in comments above and touched up
##                    the comments. Changed some indenting below.
#######################################################################

## FOR TESTING: (show statements as they execute)
#  set -x

#######################################
## Get the filename.
#######################################

#  FILENAMES="$NAUTILUS_SCRIPT_SELECTED_URIS"
#  FILENAMES="$NAUTILUS_SCRIPT_SELECTED_FILE_PATHS"

# FILENAME="$@"
FILENAME="$1"

#  CURDIR="$NAUTILUS_SCRIPT_CURRENT_URI"
CURDIR="`pwd`"


#######################################################
## Check that the selected file is a PDF file.
#######################################################

FILECHECK=`file "$FILENAME" | grep 'PDF'`
 
if test "$FILECHECK" = ""
then
   exit
fi


#########################################
## Initialize the directory for the output
## image files.
##
## If the user has write-permission on the
## current directory, put the directory
## in the pwd.
## Otherwise, put the directory in /tmp.
#########################################

# OUTDIR="${USER}_temp_pdf_images_dir"
# if test ! -w "$CURDIR"
# then
#   OUTDIR="/tmp/$OUTDIR"
# fi

# if test ! -f "$OUTDIR"
# then
#    mkdir "$OUTDIR"
# fi


###########################################################
## Generate the image files from the pages of the PDF file.
###########################################################

EXECHECK=`which pdfimages`

if test -f "$EXECHECK"
then
   IMAGE_ROOT="${USER}_temp_pdf_page_image"
   pdftoppm "$FILENAME" "$IMAGE_ROOT"
else
   zenity --info \
   --title "'pdftoppm' not found. EXITING." \
   --text "\
It appears that the executable
'pdftoppm' is not installed.

Exiting."
   exit
fi


#################################################
## Show the first image file with an image viewer.
#################################################

## . $HOME/.gnome2/nautilus-scripts/.set_VIEWERvars.shi

. $HOME/.freedomenv/feNautilusScripts/set_DIR_NautilusScripts.shi
. $DIR_NautilusScripts/.set_VIEWERvars.shi

# $IMGVIEWER "$CURDIR/${IMAGE_ROOT}-01.ppm" &
## NOTE:
## mtpaint cannot open a '.ppm' file (2010).

   eval eog     "$CURDIR/${IMAGE_ROOT}-01.ppm" &

#  eval mirage  "$CURDIR/${IMAGE_ROOT}-01.ppm" &