Programming

compact-slides.sh

#!/bin/bash
############################################################################
# \PURPOSE
#    To extract the final slides from those generated by prosper in the
#    slide show mode
#
# \USAGE
#    from the command line execute the command
#         compact-slides.sh filename[.tex]
#
# \DATE
#    02 Jun 2005
#
# \AUTHOR
#    Simone Zuccher
#
# \PHILOSOPHY
#    Use the output from latex command to figure out how many pages are
#    created for a single slide and take the last one.
#
# \INPUT(S)
#    One LaTeX file written according to prosper
#
# \OUTPUT(S)
#    input-slc.pdf
#
############################################################################


# Check how many arguments are in the line
if  [ $# -eq 0 ]
  then
  echo "Usage: `basename $0` input[.tex] " 1>&2
  exit 1
fi

# If there is an input file, get rid of the extension .tex (if there is any)
if [ $# -eq 1 ]
then
  infile="$1"
  case "${infile}" in
     *.tex) base=`basename "${infile}" .tex`;; 
     *)     base=`basename "${infile}"`;;
        esac
fi


# Temporary file
TMP_FILE="/tmp/tmp-file-condenseslides"
TMP_PSFILE="/tmp/tmp-file-ps-condenseslides"

# First we need to run LaTeX to get the info
echo 'Running LaTeX... '
latex $base.tex > $TMP_FILE

# Since we have an updated dvi file, let's make a good postscript
echo 'Running dvips... '
dvips -q -Pcmz -Pamz -tA4 -Ppdf -G0 $base.dvi -o $TMP_PSFILE.ps

# initialize counter
i=1

# initialize page number to select
page=0


# be AWARE of infinite loop...
while :   
do

  # work string
  str=\\[$i\\]
  
  # get the number of ps pages correspondint to the i-th slide
  slidesl="$(sed s/$str/$str'\n'/g $TMP_FILE | grep $str -c)"
  
  # if there are no more slides... exit the loop
  if [ ${slidesl} -eq 0 ]; then
     break 1
  fi
  
  # this condition is needed to put the comma... :(
  if [ $i -gt 1 ]; then
     list_of_pages="$list_of_pages,"
  fi
  
  # calculate the page to get
  page=`expr $page + ${slidesl}`
  
  # echo what it's doing
#  echo Slide $i is made of ${slidesl} slides. Taking page $page
  
  list_of_pages="$list_of_pages$page"
  
  # increment the counter
  i=`expr $i + 1`
  
done


# Extract pages
echo Extracting pages...
psselect -q -p $list_of_pages $TMP_PSFILE.ps $base-slc.ps 

# Create the PDF file
echo Creating PDF file...
ps2pdf -sPAPERSIZE=a4 $base-slc.ps

# Remove the PS file
#rm -f  $base-slc.ps

# total number of slides
nslides=`expr $i - 1`

# remove the temporary file
rm -f $TMP_FILE
rm -f $TMP_PSFILE.ps

# Done!
echo $nslides slides processed, exiting succesfully.