source: trunk/gsdl/bin/script/pdftohtml.pl@ 1997

#!/usr/bin/perl -w


###########################################################################
#
# pdftohtml.pl -- convert documents to HTML ot TEXT format
#
# A component of the Greenstone digital library software
# from the New Zealand Digital Library Project at the 
# University of Waikato, New Zealand.
#
# Copyright (C) 1999 New Zealand Digital Library Project
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
###########################################################################

# pdftohtml.pl is a wrapper for running pdftohtml utility which converts
# PDF documents to HTML, and converts images to PNG format for display in
# the HTML pages generated

BEGIN {
    die "GSDLHOME not set\n" unless defined $ENV{'GSDLHOME'};
    unshift (@INC, "$ENV{'GSDLHOME'}/perllib");
}

use parsargv;
use util;
use Cwd;
use File::Basename;

sub print_usage {
print STDERR  
    ("pdftohtml version 0.22\n",
     "Usage: pdftohtml [options] <PDF-file> [<html-file>]\n",
     "  -f <int>      : first page to convert\n",
     "  -l <int>      : last page to convert\n",
     "  -d <dir>      : target directory (default: basename of pdf-file)\n",
     "  -o <file>     : name of output file; - means stdout (default index.html)\n",
     "  -q            : don't print any messages or errors\n",
     "  -h            : print this usage information\n",
     "  -p            : exchange .pdf links by .html\n",
     "  -c            : generate complex HTML document\n",
     "  -F            : don't use frames in HTML document\n",
     "  -i            : ignore images\n",
     "  -e <string>   : set extension for images (in the Html-file) (default png)\n"
     );
exit (1);
}

sub main {
    my (@ARGV) = @_;
    my ($first,$last,$target_dir,$out_file,$img_ext,
    $optq,$opth,$optp,$optc,$optF,$opti);
    
    # read command-line arguments so that
    # you can change the command in this script
    if (!parsargv::parse(\@ARGV,
             'f/\d+/1', \$first,
             'l/\d+/1', \$last,
             'd/[\S]*/', \$target_dir,
             'o/[\S]*/', \$out_file,
             'e/[\S]*/', \$img_ext,
             'q', \$optq,
             'h', \$opth,
             'p', \$optp,
             'c', \$optc,
             'F', \$optF,
             'i', \$opti
             ))
    {
    print_usage();
    }

    # Make sure the input file exists and can be opened for reading
    if (scalar(@ARGV!=2)) {
    print_usage();
    }

    my $input_filename = $ARGV[0];
    my $output_filestem = $ARGV[1];

    my @dir = split (/(\/|\\)/, $input_filename);
    pop(@dir);
    my $dir = join ("", @dir);

    if (!-r $input_filename) {
    print STDERR "Error: unable to open $input_filename for reading\n";
    exit(1);
    }

    # formulate the command
    my ($p_home, $pdftohtml);

    if ($ENV{'GSDLOS'} =~ /^windows/i) {
    $p_home = &util::filename_cat($ENV{'GSDLHOME'}, "bin", "windows");
    $pdftohtml = &util::filename_cat($p_home, "pdftohtml.bin");
    }
    else  {
    $p_home = &util::filename_cat($ENV{'GSDLHOME'}, "packages", "pdftohtml");
    $pdftohtml = &util::filename_cat($p_home, "bin", "pdftohtml.bin");
    }
    return 0 unless (-e "$pdftohtml");
    
    $cmd = "";
    if ($timeout) {$cmd = "ulimit -t $timeout;";}
    $cmd .= "$pdftohtml -noframes";
    $cmd .= " \"$input_filename\" \"$output_filestem.html\"";
    $cmd .= " >\"$output_filestem.out\" 2>\"$output_filestem.err\"";
    
    if (system($cmd)>0) {
    print STDERR "Error executing $cmd: $!\n";
    &util::rm("$output_filestem.text") if (-e "$output_filestem.text");
    &util::rm("$output_filestem.err") if (-e "$output_filestem.err");
    return 0;
    }

    # Need to convert images from PPM format to PNG format
    my @images;
    open (IMAGES, "images.log");
    while (<IMAGES>) {
    push (@images, $_);
    }
    close IMAGES;
    
    for $image (@images) {
    chomp($image);
    my $cmd = "";
    if ($ENV{'GSDLOS'} =~ /^windows/i) {
        $cmd = &util::filename_cat($ENV{'GSDLHOME'}, "bin", "windows", "pnmtopng.exe");
        $cmd .= " $image";
        if (system($cmd)>0) {
        print STDERR "Error executing $cmd\n";
        return 0; # not sure about whether to leave this one in or take it out
        }
    } else {
        my @nameparts = split(/\./, $image);
        my $image_base = shift(@nameparts);

        $cmd = "pnmtopng $image > $image_base.png";
        if (system($cmd)>0) {
        $cmd = "convert $image $image_base.png";
        if (system($cmd)>0) {
            print STDERR "Cannot convert $image into PNG format...\n";
            return 0; # not sure about whether to leave this one in or take it out
        }
        }
    }
    &util::rm($image);
    }

    return 1;
}

&main(@ARGV);