namazu/filter/pdf.pl

#
# -*- Perl -*-
# $Id: pdf.pl,v 1.22 2001/01/04 01:57:58 baba Exp $
# Copyright (C) 1997-2000 Satoru Takabayashi ,
#               1999 NOKUBI Takatsugu All rights reserved.
#     This is free software with ABSOLUTELY NO WARRANTY.
#
#  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 versions 2, 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., 59 Temple Place - Suite 330, Boston, MA
#  02111-1307, USA
#
#  This file must be encoded in EUC-JP encoding
#

package pdf;
use strict;
require 'util.pl';
require 'gfilter.pl';

my $pdfconvpath = undef;

sub mediatype() {
    return ('application/pdf');
}

sub status() {
    $pdfconvpath = util::checkcmd('pdftotext');
    return 'yes' if (defined $pdfconvpath);
    return 'no';
}

sub recursive() {
    return 0;
}

sub pre_codeconv() {
    return 0;
}

sub post_codeconv () {
    return 1;
}

sub add_magic ($) {
    return;
}

sub filter ($$$$$) {
    my ($orig_cfile, $cont, $weighted_str, $headings, $fields)
      = @_;
    my $cfile = defined $orig_cfile ? $$orig_cfile : '';

    my $tmpfile = util::tmpnam('NMZ.pdf');
    my $tmpfile2 = util::tmpnam('NMZ.pdf2');

    my $fh = util::efopen("> $tmpfile");
    print $fh $$cont;
    undef $fh;

    if (util::islang("ja")) {
        util::vprint("Processing pdf file ... (using  '$pdfconvpath' in Japanese mode)\n");
        system("$pdfconvpath -q -eucjp $tmpfile $tmpfile2");
    } else {
        util::vprint("Processing pdf file ... (using  '$pdfconvpath')\n");
        system("$pdfconvpath -q $tmpfile $tmpfile2");
    }
    unless (-e $tmpfile2) {
        unlink $tmpfile;
        unlink $tmpfile2;
        return 'Unable to convert pdf file (maybe copying protection)';
    }

    $fh = util::efopen("< $tmpfile2");
    $$cont = util::readfile($fh);
    undef $fh;
    unlink $tmpfile;
    unlink $tmpfile2;

    gfilter::line_adjust_filter($cont);
    gfilter::line_adjust_filter($weighted_str);
    gfilter::white_space_adjust_filter($cont);
    $fields->{'title'} = gfilter::filename_to_title($cfile, $weighted_str)
        unless $fields->{'title'};
    gfilter::show_filter_debug_info($cont, $weighted_str,
                           $fields, $headings);
    return undef;
}

1;
1	#
2	# -- Perl --
3	# $Id: pdf.pl,v 1.22 2001/01/04 01:57:58 baba Exp $
4	# Copyright (C) 1997-2000 Satoru Takabayashi ,
5	# 1999 NOKUBI Takatsugu All rights reserved.
6	# This is free software with ABSOLUTELY NO WARRANTY.
7	#
8	# This program is free software; you can redistribute it and/or modify
9	# it under the terms of the GNU General Public License as published by
10	# the Free Software Foundation; either versions 2, or (at your option)
11	# any later version.
12	#
13	# This program is distributed in the hope that it will be useful
14	# but WITHOUT ANY WARRANTY; without even the implied warranty of
15	# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16	# GNU General Public License for more details.
17	#
18	# You should have received a copy of the GNU General Public License
19	# along with this program; if not, write to the Free Software
20	# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
21	# 02111-1307, USA
22	#
23	# This file must be encoded in EUC-JP encoding
24	#
25
26	package pdf;
27	use strict;
28	require 'util.pl';
29	require 'gfilter.pl';
30
31	my $pdfconvpath = undef;
32
33	sub mediatype() {
34	return ('application/pdf');
35	}
36
37	sub status() {
38	$pdfconvpath = util::checkcmd('pdftotext');
39	return 'yes' if (defined $pdfconvpath);
40	return 'no';
41	}
42
43	sub recursive() {
44	return 0;
45	}
46
47	sub pre_codeconv() {
48	return 0;
49	}
50
51	sub post_codeconv () {
52	return 1;
53	}
54
55	sub add_magic ($) {
56	return;
57	}
58
59	sub filter ($$$$$) {
60	my ($orig_cfile, $cont, $weighted_str, $headings, $fields)
61	= @_;
62	my $cfile = defined $orig_cfile ? $$orig_cfile : '';
63
64	my $tmpfile = util::tmpnam('NMZ.pdf');
65	my $tmpfile2 = util::tmpnam('NMZ.pdf2');
66
67	my $fh = util::efopen("> $tmpfile");
68	print $fh $$cont;
69	undef $fh;
70
71	if (util::islang("ja")) {
72	util::vprint("Processing pdf file ... (using '$pdfconvpath' in Japanese mode)\n");
73	system("$pdfconvpath -q -eucjp $tmpfile $tmpfile2");
74	} else {
75	util::vprint("Processing pdf file ... (using '$pdfconvpath')\n");
76	system("$pdfconvpath -q $tmpfile $tmpfile2");
77	}
78	unless (-e $tmpfile2) {
79	unlink $tmpfile;
80	unlink $tmpfile2;
81	return 'Unable to convert pdf file (maybe copying protection)';
82	}
83
84	$fh = util::efopen("< $tmpfile2");
85	$$cont = util::readfile($fh);
86	undef $fh;
87	unlink $tmpfile;
88	unlink $tmpfile2;
89
90	gfilter::line_adjust_filter($cont);
91	gfilter::line_adjust_filter($weighted_str);
92	gfilter::white_space_adjust_filter($cont);
93	$fields->{'title'} = gfilter::filename_to_title($cfile, $weighted_str)
94	unless $fields->{'title'};
95	gfilter::show_filter_debug_info($cont, $weighted_str,
96	$fields, $headings);
97	return undef;
98	}
99
100	1;