#!/usr/bin/perl 
#this software copyright 2004, provided as-is. The author takes no
#liabilty or responsibility for use or misuse, functioning or
#misfunctioning of this software.

use strict;
use Getopt::Long;
use Spreadsheet::ParseExcel;

my $version="0.1";
my $progname="antixls";
my $long_progname="antixls";

sub printHelp {
    print "Usage: $progname [options...] excelfile1 [excelfile2 ...]\n";
    print "General Options:\n";
    print "--help\t\t\tThis help information\n";
    print "--version\t\tShow version information\n";
    print "--formatted\t\tDisplay sheets in ASCII-art table\n";
    print "--linear\t\tDisplay sheets in \"linear\" (unformatted) mode\n";
    print "--csv\t\t\tDisplay sheets in CSV mode\n";
    print "--indexed\t\tDisplay sheets linearly with cell indices (default)\n";
}

sub printVersion {
    print "$long_progname v$version\n";
}

my $format; 

my $helpOption=0;
my $versionOption=0;
my $formattedOption=0;
my $linearOption=0;
my $csvOption=0;
my $indexOption=0;

GetOptions('help' => \$helpOption,
           'version' => \$versionOption,
	   'f|formatted' => \$formattedOption,
	   'l|linear' => \$linearOption,
	   'c|csv' => \$csvOption,
	   'i|indexed'=> \$indexOption);

if($helpOption){
    printHelp();
    exit(0);
} elsif($versionOption){
    printVersion();
    exit(0);
} elsif($formattedOption){
    $format = 1;
} elsif($linearOption){
    $format = 2;
} elsif($csvOption){
    $format = 4;
} else{
    $format = 3;
}

while(my $f = shift){
    do_convert($f);
}

sub do_convert {
    my $oBook = Spreadsheet::ParseExcel::Workbook->Parse(shift);
    my($iR, $iC, $oWkS, $oWkC);
    foreach my $oWkS (@{$oBook->{Worksheet}}) {
	if($format == 3){ ##indexed
	    print "Sheet: ", $oWkS->{Name}, "\n";
	    for(my $iR = $oWkS->{MinRow} ;
		defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
		for(my $iC = $oWkS->{MinCol} ;
		    defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
		    $oWkC = $oWkS->{Cells}[$iR][$iC];
		    print "($iR, $iC)\t\t", $oWkC->Value, "\n" if($oWkC);
		}
	    }
	}
	elsif($format == 2){ ##linear
	    print "Sheet: ", $oWkS->{Name}, "\n";
	    for(my $iR = $oWkS->{MinRow} ;
		defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
		for(my $iC = $oWkS->{MinCol} ;
		    defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
		    $oWkC = $oWkS->{Cells}[$iR][$iC];
		    print $oWkC->Value, "\t" if($oWkC);
		}
		print "\n";
	    }
	}
	elsif($format == 4){ ##CSV
	    for(my $iR = $oWkS->{MinRow} ;
		defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
		for(my $iC = $oWkS->{MinCol} ;
		    defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
		    $oWkC = $oWkS->{Cells}[$iR][$iC];
		    if($oWkC){
			if($oWkC->Value =~ /.*,.*/){ #if there are any other values here to be fixed, add them...
			    print "\"", $oWkC->Value, "\",";
			}
			else{
			    print $oWkC->Value, ",";
			}
		    }
			else {
				print ","; #empty cell
			}
		}
		print "\n";
	    }
	}
	else{ ##formatted 
	    my $maxlen = 0; 
	    for(my $iR = $oWkS->{MinRow} ;
		defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
		for(my $iC = $oWkS->{MinCol} ;
		    defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
		    $oWkC = $oWkS->{Cells}[$iR][$iC];
		    if($oWkC){
			if(length($oWkC->Value) > $maxlen){
			    $maxlen = length($oWkC->Value);
			}
		    }
		}
	    }
	    print "Sheet: ", $oWkS->{Name}, "\n", "="x80, "\n";
	    for(my $iR = $oWkS->{MinRow} ;
		defined $oWkS->{MaxRow} && $iR <= $oWkS->{MaxRow} ; $iR++) {
		print "|";
		for(my $iC = $oWkS->{MinCol} ;
		    defined $oWkS->{MaxCol} && $iC <= $oWkS->{MaxCol} ; $iC++) {
		    $oWkC = $oWkS->{Cells}[$iR][$iC];
		    #print $oWkC->Value if($oWkC);
		    if($oWkC){
			print pad_to_len($oWkC->Value, $maxlen);
		    }
		    else{
			print ' 'x$maxlen;
		    }
		    print "|";
		}
		print "\n";
	    }
        }	    
    }
}

sub pad_to_len{
    my $str = shift; 
    my $goal = shift; 
    my $cur = length($str);
    while($cur < $goal){
	$str .= ' ';
	$cur++;
    }
    return $str;
}