pdfcut

#!/bin/bash
## FILE: pdfcut
##
## DESCRIPTION: Cuts selected pages out of a PDF file
##
## AUTHOR: Edward Comer
##
## DATE: 2013-06-27
##
## VERSION: 1.0
##
## Requires: zenity and pdf2ps tools
##
## USAGE: pdfcut -f n -l n sourcepath.pdf [destpath.pdf]
##    OR: pdfcut sourcepatf.pdf
##    OR: pdfcut
##
Revision=1.0
Date=20130627

TF="/tmp/$(basename $0).$$.tmp"
vflag=0
first=
last=
out=
file=
Dflag=

declare -r SCRIPT_NAME=$(basename "$BASH_SOURCE" .sh)

guiargs() {
    zenity --forms --title="Cut PDF Pages" \
    --text="Enter information about PDF" \
    --separator="," \
    --add-entry="First Page to Cut" \
    --add-entry="Last Page to Cut" \
    --add-entry="Destination Filename"  > /tmp/pdfcutgui.csv

    case $? in
    0)
        echo "GUI Arguments accepted"
    ;;
    1)
        echo "Nothing entered"
        bail
    ;;
    -1)
        echo "An unexpected error has occurred."
        bail
    ;;
    esac

# Parse the saved parameters from CSV file created above
    cat /tmp/pdfcutgui.csv | while read line
    do
        first=`echo $line | cut -d',' -f1`  # get first page num
        last=`echo $line | cut -d',' -f2`   # get last page num
        dest=`echo $line | cut -d',' -f3`   # get dest filename
        # This nonsense avoids variable scope of while loop
        echo first=$first > $TF
        echo last=$last >> $TF
        echo dest=\"$dest\" >> $TF
    done
    chmod 777 $TF
    . $TF
            rm /tmp/pdfcutgui.csv $TF
}

guisrc() {
FILE=`zenity --file-selection --title="Select a File"`

case $? in
         0)
                echo "\"$FILE\" selected."
                source=$FILE
                ;;
         1)
                echo "No file selected."
                bail
                ;;
        -1)
                echo "An unexpected error has occurred."
                bail
                ;;
esac
}

## exit the shell(default status code: 1) after printing the message to stderr
bail() {
    echo -ne "$1" >&2
    exit ${2-1}
}

## help message
declare -r HELP_MSG="Usage: $SCRIPT_NAME [OPTION] Source.pdf [Dest.pdf]
  -h    display this help and exit
  -f n  first page is n
  -l n  last page is n
  -V    print version info
  -v    verbose output

  Or, no arguments for GUI input
"

## print the usage and exit the shell(default status code: 2)
usage() {
    declare status=2
    if [[ "$1" =~ ^[0-9]+$ ]]; then
        status=$1
        shift
    fi
    bail "${1}$HELP_MSG" $status
}


while getopts hvVf:l: flag
do
    case "$flag" in
    (h) help; exit 0;;
    (V) echo "$0: version $Revision ($Date)"; exit 0;;
    (v) vflag=1;;
    (f) first="$OPTARG";;
    (l) last="$OPTARG";;
    (*) usage;;
    esac
done
shift $(expr $OPTIND - 1)

shift $(($OPTIND - 1))

# If no source passed in cmd line, prompt for one
if [[ "$#" -eq 0 ]];
then
    guisrc
else
    source=$1
fi

# Less than 2 args requires dialog to fetch parameters and dest
if [[ "$#" -lt 2 ]];
    then
        guiargs         # Use GUI to fetch parameters
    else
    if [ -n "$2" ]; then
        dest=$2
    fi
fi

#==========MAIN CODE BELOW==========

if [ ! -r "$source" ];  # Does source file exist?
then
    echo "File $source does not exist"
    usage
    bail
fi

if [ $vflag = 1 ]; then
    echo first = $first
    echo last = $last
    echo OPTIND = $OPTIND
    echo "Source file: " $source
    echo "Dest   file: " $dest
    echo "pdftops $source - | psselect -p${first}-${last} | ps2pdf14 - $dest"
    exit 0
fi

echo Be patient - this can take a while

pdftops $source - | psselect -p${first}-${last} | ps2pdf14 - $dest
echo Job Complete, file $dest created
exit 0