pdfls

#!/bin/bash
version=0.1.2
############################################################################
##                                                                        ##
##  pdfls:  A shell-script to view a batch of pdf files consecutively     ##  
##                                                                        ##
##  Author: Pavel Loskot, loskot@gmail.com                                ##
##                                                                        ##
##  Usage: "textblocks -help"                                             ##
##                                                                        ##
##  License: GNU/GPL version 2 or later. No other warranty.               ##
##                                                                        ##
##  Configuration file may appear in future versions.                     ##
##                                                                        ## 
##  Developed and tested with GNU bash version 5.2.15                     ##
##                                                                        ##
############################################################################

trap "echo :exiting;exit 1" SIGINT SIGTERM

set -e

export LC_CTYPE="en_US.utf8"

this="${0/#*\/}"

if [[ "$#" == "0" || "$1" == @(-h|--help) ]]; then
    echo "
  $this - a shell script for block/batch viewing pdf files

  Usage: pdfls [params] files|[-f|--file <filename>]
    	 
    Parameters:
     -h, --help     show this help and quit
     -q, --quiet    do not display any messages
     -i, --info     show output of pdfinfo
     -k, --keypress interactive mode with keys enabled
     -f, --file <filename> read file names from this file

    Keys: (interactive mode)
      h:help t:target s:size c:copy m:move n:next o:nOte q:quit
	 "
    exit 0
fi

quiet=no
pinfo=no
keypress=no
fromfile=no
fname=
files=

while [[ $# > 0 ]]; do
    case $1 in
	-q|--quiet)
	    quiet=yes
	    keypress=no
	    ;;
	-i|--info)
	    pinfo=yes
	    quiet=yes
	    keypress=yes
	    ;;
	-k|--keypress)
	    keypress=yes
	    quiet=no
	    ;;
	-f|--file)
	    fromfile=yes
	    shift
	    fname=$1
	    break
	    ;;
	-*)
	    echo uknown parameter "$par"
	    exit 1
	    ;;
	*)
	    files=$(ls -1U "$@" | grep ".pdf\|.PDF\|.epub")
	    break
	    ;;
    esac
    shift
done

if [[ "$fromfile" == "yes" ]]; then
    files=$(cat $fname)
fi
n=$(ls -1 $files 2</dev/null | wc -l)
c=0
target=$HOME
for f in $files; do
    if [[ ! -f "$f" ]]; then
	echo "$f" does not exist, skipping
	let n=n-1
	continue
    fi
    let c=c+1
    if [[ "$quiet" == "no" ]]; then
	echo [$c/$n]:$f
	echo -n "${f%.*}" | \xclip -selection clipboard
    fi
    if [[ "$pinfo" == "yes" ]]; then
	clear
	pdfinfo $f
	echo
	echo [$c/$n]:$f
    fi
    if [[ "$keypress" == "yes" ]]; then
	/usr/bin/okular $f 2> /dev/null &
	p=$!
	while : ; do
	    read -n 1 -s a
	    case "$a" in
		h)
		    echo "t:target s:size c:copy m:move n:next o:nOte q:quit"
		    ;;
		t) 
		    read -e -p "t=" -i "$target" t
		    target=${t}
		    ;;
		s)
		    ls -lh $f
		    ;;
		m)
		    read -e -p "mv % " -i "\$t" a
		    cmd=$(echo "mv $f $a" | sed "s|\$t|$target|")
		    $cmd
		    break
		    ;;
		c)
		    read -e -p "cp % " -i "\$t" a
		    cmd=$(echo "cp $f $a" | sed "s|\$t|$target|")
		    $cmd
		    break
		    ;;
		o)
		    f1=${f%.*}.note
		    touch $f1
		    vim $f1
		    break
		    ;;
		q)
		    exit 1
		    ;;
		n)
		    break
		    ;;
		*)
		    break
		    ;;
	    esac
	done
	kill -13 $p
    else
	/usr/bin/okular $f 2> /dev/null
    fi
done