| 1 | ###########################################################################
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| 2 | #
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| 3 | # LaTeXPlugin.pm
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| 4 | #
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| 5 | # A component of the Greenstone digital library software
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| 6 | # from the New Zealand Digital Library Project at the
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| 7 | # University of Waikato, New Zealand.
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| 8 | #
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| 9 | # Written by John McPherson
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| 10 | # Copyright (C) 2004 New Zealand Digital Library Project
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| 11 | #
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| 12 | # This program is free software; you can redistribute it and/or modify
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| 13 | # it under the terms of the GNU General Public License as published by
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| 14 | # the Free Software Foundation; either version 2 of the License, or
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| 15 | # (at your option) any later version.
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| 16 | #
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| 17 | # This program is distributed in the hope that it will be useful,
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| 18 | # but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 19 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 20 | # GNU General Public License for more details.
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| 21 | #
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| 22 | ###########################################################################
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| 23 |
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| 24 | # todo:
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| 25 | # \includegraphics
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| 26 | # parse/remove tex \if ... macros
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| 27 |
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| 28 | package LaTeXPlugin;
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| 29 |
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| 30 | # System complains about $arguments if the strict is set
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| 31 | use strict;
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| 32 | no strict 'refs'; # so we can print to a handle named by a variable
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| 33 |
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| 34 | # greenstone packages
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| 35 | use ReadTextFile;
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| 36 | use unicode;
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| 37 | use util;
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| 38 |
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| 39 | my $arguments =
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| 40 | [ { 'name' => "process_exp",
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| 41 | 'desc' => "{ReadTextFile.process_exp}",
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| 42 | 'type' => "regexp",
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| 43 | 'reqd' => "no",
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| 44 | 'deft' => &get_default_process_exp() } ];
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| 45 |
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| 46 | my $options = { 'name' => 'LaTeXPlugin',
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| 47 | 'desc' => '{LaTeXPlugin.desc}',
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| 48 | 'abstract' => 'no',
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| 49 | 'inherits' => 'yes',
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| 50 | 'args' => $arguments };
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| 51 |
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| 52 | sub BEGIN {
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| 53 | @LaTeXPlugin::ISA = ('ReadTextFile');
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| 54 | }
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| 55 |
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| 56 | sub new {
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| 57 | my ($class) = shift (@_);
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| 58 | my ($pluginlist,$inputargs,$hashArgOptLists) = @_;
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| 59 | push(@$pluginlist, $class);
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| 60 |
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| 61 | push(@{$hashArgOptLists->{"ArgList"}},@{$arguments});
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| 62 | push(@{$hashArgOptLists->{"OptList"}},$options);
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| 63 |
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| 64 | my $self = new ReadTextFile($pluginlist, $inputargs, $hashArgOptLists);
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| 65 |
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| 66 | $self->{'aux_files'} = {};
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| 67 | $self->{'dir_num'} = 0;
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| 68 | $self->{'file_num'} = 0;
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| 69 | return bless $self, $class;
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| 70 | }
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| 71 |
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| 72 |
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| 73 | sub get_default_process_exp {
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| 74 | my $self = shift (@_);
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| 75 | return q^\.tex$^;
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| 76 | }
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| 77 |
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| 78 | sub get_default_block_exp {
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| 79 | # assume any .eps files are part of the latex stuff
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| 80 | return '\.(?:eps)$';
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| 81 | }
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| 82 |
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| 83 |
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| 84 | sub process {
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| 85 | my $self = shift (@_);
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| 86 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj, $gli) = @_;
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| 87 |
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| 88 | my $start=substr($$textref, 0, 200); # first 200 bytes
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| 89 |
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| 90 | if ($start !~ m~\\ (?:documentclass | documentstyle | input | section
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| 91 | | chapter | contents | begin) ~x) {
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| 92 | # this doesn't look like latex...
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| 93 | return undef;
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| 94 | }
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| 95 | my $outhandle = $self->{'outhandle'};
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| 96 | if ($gli) {
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| 97 | print STDERR "<Processing n='$file' p='LaTeXPlugin'>\n";
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| 98 | } elsif ($self->{'verbosity'} > 1) {
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| 99 | print $outhandle "LaTeXPlugin: processing $file\n"
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| 100 | }
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| 101 | my $cursection = $doc_obj->get_top_section();
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| 102 |
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| 103 | ###### clean up text ######
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| 104 | $$textref =~ s/\r$//mg; # remove dos ^M
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| 105 | $$textref =~ s/%.*$//mg; # remove comments
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| 106 |
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| 107 | # convert to utf-8 if not already - assume non ascii => iso-8859-1/latin
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| 108 |
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| 109 | $$textref =~ s@(?<=[[:ascii:]])\xA0+@\xc2\xa0@g; # latin nonbreaking space
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| 110 | # check that both sides are ascii, so we don't screw up utf-8 chars
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| 111 | $$textref =~ s@ (?<=[[:ascii:]])([\x80-\xff])(?=[[:ascii:]]) @
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| 112 | unicode::ascii2utf8($1) @egx; # takes "extended ascii" (ie latin)
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| 113 |
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| 114 |
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| 115 | ###### find metadata ######
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| 116 |
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| 117 | ## FileFormat metadata ##
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| 118 | $doc_obj->add_metadata($cursection, "FileFormat", "LaTeX");
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| 119 |
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| 120 | ### title metadata ###
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| 121 | $$textref =~ m@\\title\s*{(.*?)}@s;
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| 122 | my $title = $1;
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| 123 | if (!$title) {
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| 124 | # no title tag. look for a chapter/section heading
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| 125 | $$textref =~ m@\\(?:chapter|section)\s*{(.*?)}@s; # will get 1st match
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| 126 | $title = $1;
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| 127 | }
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| 128 | if (!$title) {
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| 129 | # no chapter/section heading tags either... use filename
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| 130 | $title = $file;
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| 131 | $title =~ s/\.tex$//i;
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| 132 | $title =~ s/[-_.]/ /g; # turn punctuation into spaces
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| 133 | }
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| 134 | if ($title) {
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| 135 | $title =~ s@\\\\@ @g; # embedded newlines
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| 136 | $title = $self->process_latex($title); # no "-html" for title eg in browser
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| 137 | $doc_obj->add_utf8_metadata($cursection, "Title", $title);
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| 138 | }
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| 139 |
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| 140 | ### creator/individual author metadata ###
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| 141 | $$textref =~ m@\\author\s*{((?:{.*?}|.*?)+)}\s*$@sm;
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| 142 | my $authors=$1;
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| 143 | if ($authors) {
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| 144 | # take care of "et al."...
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| 145 | $authors =~ s/(\s+et\.?\s+al\.?)\s*$//;
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| 146 | my $etal=$1;
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| 147 | $etal="" if (!defined ($etal));
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| 148 |
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| 149 | my @authorlist=parse_authors($self, $authors);
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| 150 |
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| 151 | foreach my $author (@authorlist) {
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| 152 | # Add each name to set of Authors
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| 153 | $doc_obj->add_utf8_metadata ($cursection, "Author", $author);
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| 154 | }
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| 155 |
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| 156 | # Only want at most one "and" in the Creator field
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| 157 | my $creator_str="";
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| 158 | if (scalar(@authorlist) > 2) {
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| 159 | my $lastauthor=pop @authorlist;
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| 160 | $creator_str=join(', ', @authorlist);
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| 161 | $creator_str.=" and $lastauthor";
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| 162 | } else { # 1 or 2 authors...
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| 163 | $creator_str=join(" and ",@authorlist);
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| 164 | }
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| 165 | $creator_str.=$etal; # if there was "et al."
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| 166 | $doc_obj->add_utf8_metadata($cursection, "Creator", $creator_str);
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| 167 | }
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| 168 | ### end of author metadata ###
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| 169 |
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| 170 | ###### process latex for the main text ######
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| 171 | $$textref =~ s/^.*?\\begin{document}//s;
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| 172 | $$textref =~ s/\\end{document}.*?$//s;
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| 173 | $$textref = $self->process_latex("-html",$$textref);
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| 174 | $doc_obj->add_utf8_text($cursection, $$textref);
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| 175 |
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| 176 | return 1;
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| 177 | }
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| 178 |
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| 179 |
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| 180 | # returns a list of author names
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| 181 | sub parse_authors {
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| 182 | my $self=shift;
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| 183 | my $authors=shift;
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| 184 |
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| 185 | my $outhandle=$self->{'outhandle'};
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| 186 |
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| 187 | $authors =~ s/\n/ /g; # remove newlines
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| 188 |
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| 189 | # some people do this for affiliation footnote/dagger
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| 190 | $authors =~ s@\$.*?\$@@g; # remove maths from author :(
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| 191 |
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| 192 | # und here for german language...
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| 193 | # don't use brackets in pattern, else the matched bit becomes
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| 194 | # an element in the list!
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| 195 | my @authorlist = split(/\s+and\s+|\s+und\s+/, $authors);
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| 196 | my @formattedlist = ();
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| 197 | foreach my $author (@authorlist) {
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| 198 | $author =~ s/\s*$//;
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| 199 | $author =~ s/^\s*//;
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| 200 | # Reformat and add author name
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| 201 | next if $author=~ /^\s*$/;
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| 202 |
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| 203 | # names are "First von Last", "von Last, First"
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| 204 | # or "von Last, Jr, First". See the "BibTeXing" manual, page 16
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| 205 | my $first="";
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| 206 | my $vonlast="";
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| 207 | my $jr="";
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| 208 |
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| 209 | if ($author =~ /,/) {
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| 210 | my @parts=split(/,\s*/, $author);
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| 211 | $first = pop @parts;
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| 212 | if (scalar(@parts) == 2) {
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| 213 | $jr = pop @parts;
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| 214 | }
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| 215 | $vonlast=shift @parts;
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| 216 | if (scalar(@parts) > 0) {
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| 217 | print $outhandle $self->{'plugin_type'} .
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| 218 | ": couldn't parse name $author\n";
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| 219 | # but we continue anyway...
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| 220 | }
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| 221 | } else { # First von Last
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| 222 | my @words = split(/ /, $author);
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| 223 | while (scalar(@words) > 1 && $words[0] !~ /^[a-z]{2..}/) {
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| 224 | $first .= " " . shift (@words);
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| 225 | }
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| 226 | $first =~ s/^\s//;
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| 227 | $vonlast = join (' ', @words); # whatever's left...
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| 228 | }
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| 229 | my $von="";
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| 230 | my $last="";
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| 231 | if ($vonlast =~ m/^[a-z]/) { # lowercase implies "von"
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| 232 | $vonlast =~ s/^(([a-z]\w+\s+)+)//;
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| 233 | $von = $1;
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| 234 | if (!defined ($von)) {
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| 235 | # some non-English names do start with lowercase
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| 236 | # eg "Marie desJardins". Also we can get typos...
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| 237 | print $outhandle "BibTexPlug: couldn't parse surname $vonlast\n";
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| 238 | $von="";
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| 239 | if ($vonlast =~ /^[a-z]+$/) {
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| 240 | # if it's all lowercase, uppercase 1st.
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| 241 | $vonlast =~ s/^(.)/\u$1/;
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| 242 | }
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| 243 | }
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| 244 | $von =~ s/\s*$//;
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| 245 | $last=$vonlast;
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| 246 | } else {
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| 247 | $last=$vonlast;
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| 248 | }
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| 249 | my $wholename="$first $von $last $jr";
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| 250 | $wholename =~ s/ $//; $wholename =~ s/\s+/ /g;
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| 251 | # my $fullname = "$last";
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| 252 | # $fullname .= " $jr" if ($jr);
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| 253 | # $fullname .= ", $first";
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| 254 | # $fullname .= " $von" if ($von);
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| 255 | push (@formattedlist, $wholename);
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| 256 | }
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| 257 | return @formattedlist;
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| 258 | }
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| 259 |
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| 260 |
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| 261 | ## following functions based on bibtex plugin ##
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| 262 | # not actually used at the moment, but might be useful in future?
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| 263 | sub expand_month {
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| 264 | my $text=shift;
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| 265 |
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| 266 | # bibtex style files expand abbreviations for months.
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| 267 | # Entries can contain more than one month (eg ' month = jun # "-" # aug, ')
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| 268 | $text =~ s/jan/_textmonth01_/g;
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| 269 | $text =~ s/feb/_textmonth02_/g;
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| 270 | $text =~ s/mar/_textmonth03_/g;
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| 271 | $text =~ s/apr/_textmonth04_/g;
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| 272 | $text =~ s/may/_textmonth05_/g;
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| 273 | $text =~ s/jun/_textmonth06_/g;
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| 274 | $text =~ s/jul/_textmonth07_/g;
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| 275 | $text =~ s/aug/_textmonth08_/g;
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| 276 | $text =~ s/sep/_textmonth09_/g;
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| 277 | $text =~ s/oct/_textmonth10_/g;
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| 278 | $text =~ s/nov/_textmonth11_/g;
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| 279 | $text =~ s/dec/_textmonth12_/g;
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| 280 |
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| 281 | return $text;
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| 282 | }
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| 283 |
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| 284 |
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| 285 | # If you want basic html formatting (eg \emph -> <em>, \bf, etc), give "-html"
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| 286 | # as the first argument to this function.
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| 287 | #
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| 288 | # Convert accented characters, remove { }, interprete some commands....
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| 289 | # Note!! This is not comprehensive! Also assumes Latin -> Unicode!
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| 290 |
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| 291 | # Also, it sucks quite a bit for complicated/nested commands since it doesn't
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| 292 | # match { with the corresponding }, only the nearest }
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| 293 |
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| 294 | sub process_latex {
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| 295 | my $self=shift;
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| 296 | my $text=shift;
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| 297 |
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| 298 | my $outhandle=$self->{'outhandle'};
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| 299 |
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| 300 | my $html_markup=0;
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| 301 | if ($text =~ /^\-html/) {
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| 302 | $html_markup=1;
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| 303 | $text=shift;
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| 304 | }
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| 305 |
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| 306 | if (! $text) {
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| 307 | return $text;
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| 308 | }
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| 309 | # escape html-sensitive characters
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| 310 | $text =~ s@&@&@g;
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| 311 | $text =~ s@<@<@g;
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| 312 | $text =~ s@>@>@g;
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| 313 |
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| 314 | # do this before accents, since \= means something different in tabbing
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| 315 | # also \> is a tab stop too, and \\ is newline
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| 316 | sub do_tabbing {
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| 317 | my $tabbing=shift;
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| 318 | $tabbing =~ s!^.*\\kill\s*$!!mg; # \kill sets tab stops, kills line
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| 319 | $tabbing =~ s~\\(?:=|>)~\xc2\xa0~g; # replace with nbsp
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| 320 | $tabbing =~ s~[\\][\\](?:\[.*?\])?\s*$~<br/>~mg;
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| 321 | return "<br/>" . $tabbing . "<br/>\n";
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| 322 | }
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| 323 | $text =~ s@\\begin{tabbing}(.*?)\\end{tabbing}@do_tabbing($1)@ges;
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| 324 | sub do_tabular {
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| 325 | my $tabular=shift;
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| 326 | $tabular =~ s~(?<!\\)\s*&\s*~</td><td>~g;
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| 327 | $tabular =~ s~[\\][\\]\s*~</td></tr>\n <tr><td>~g;
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| 328 | $tabular =~ s~\\hline~~g; # for now...
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| 329 | $tabular =~ s~<td>\s*\\multicolumn{(\d+)}{.*?}~<td colspan="$1">~g;
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| 330 | return "<table border=\"1\">\n <tr><td>"
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| 331 | . $tabular . "</td></tr></table>\n";
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| 332 | }
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| 333 | $text =~ s@\\begin{tabular}(?:\[.*?\])?{.*?}(.*?)\\end{tabular} @
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| 334 | do_tabular($1) @xges;
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| 335 |
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| 336 | $text =~ s@[\\][\\]\s*\n@ @g; # fold lines ending with \\
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| 337 |
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| 338 | # process maths mode before accents... things like \, mean different!
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| 339 | # maths mode
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| 340 | $text =~ s@\$\$(.*?)\$\$
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| 341 | @ process_latex_math($html_markup,$1)
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| 342 | @xsge; # multi-line maths: $$ .... $$
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| 343 |
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| 344 | $text =~ s@([^\\])\$(.*?[^\\])\$
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| 345 | @$1.process_latex_math($html_markup,$2)@xsge;
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| 346 |
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| 347 |
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| 348 | # is this an amstext environment, or just custom for that input file?
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| 349 | $text =~ s@\\begin{(algorithm)}(.*?)\\end{\1}@remove_equals($2)@ges;
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| 350 |
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| 351 | # convert latex-style accented characters.
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| 352 | $self->latex_accents_to_utf8(\$text);
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| 353 |
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| 354 | # replace quotes with utf-8
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| 355 |
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| 356 | $text =~ s/``/\xe2\xc0\x9c/g; # Latex-specific, left-dbl quote (“)
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| 357 | $text =~ s/''/\xe2\xc0\x9d/g; # Latex-specific, right-dbl quote (”)
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| 358 | $text =~ s/`/\xe2\xc0\x98/g; # single left quote
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| 359 | $text =~ s/'/\xe2\xc0\x99/g; # single right quote
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| 360 |
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| 361 | ###### remove/replace latex commands ######
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| 362 | ### commands that expand to something that gets displayed ###
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| 363 | $text =~ s~\\ldots~…~g;
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| 364 | $text =~ s~\\hrule~<hr/>\n~g;
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| 365 | $text =~ s~\\maketitle~ ~;
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| 366 | ### space commands ###
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| 367 | $text =~ s~\\[vh]skip\s+\S+~~g;
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| 368 | $text =~ s~\\vspace\*?{.*?}~<div> </div>~g; # vertical space
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| 369 | $text =~ s~\\\w+skip~ ~g; # \smallskip \medskip \bigskip \baselineskip etc
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| 370 | $text =~ s~\\noindent\b~~g;
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| 371 | # newpage, etc
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| 372 | $text =~ s~\\(?:clearemptydoublepage|newpage)~~g;
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| 373 | ### counters, contents, environments, labels, etc ###
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| 374 | $text =~ s~\\(?:addcontentsline){.*?}{.*?}{.*}~~g;
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| 375 | $text =~ s~\s*\\begin{itemize}\s*~\n<ul>\n~g;
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| 376 | $text =~ s~\s*\\end{itemize}\s*~</li></ul>\n~g;
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| 377 | $text =~ s~\s*\\begin{enumerate}\s*~<ol>\n~g;
|
|---|
| 378 | $text =~ s~\s*\\end{enumerate}\s*~</li></ol>\n~g;
|
|---|
| 379 | if ($text =~ s~\s*\\item~</li>\n<li>~g) {
|
|---|
| 380 | # (count for first list item)
|
|---|
| 381 | $text =~ s~<([ou])l>\s*</li>\s*~<$1l>~g;
|
|---|
| 382 | }
|
|---|
| 383 | $text =~ s~\\(?:label|begin|end){.*?}\s*\n?~ ~g; # remove tag and contents
|
|---|
| 384 | $text =~ s~\\(?:tableofcontents|listoffigures)~ ~g;
|
|---|
| 385 | ### font sizes/styles ###
|
|---|
| 386 | $text =~ s~\\(?:tiny|small|footnotesize|normalsize|large|Large|huge|Huge)\b~~g;
|
|---|
| 387 |
|
|---|
| 388 | if ($html_markup) {
|
|---|
| 389 | $text =~ s~\\section\*?{([^\}]+)}\s*\n?~<H1>$1</H1>\n~g;
|
|---|
| 390 | $text =~ s~\\subsection\*?{(.*?)}\s*\n?~<H2>$1</H2>\n~g;
|
|---|
| 391 | $text =~ s~{\\tt\s*(.*?)}~<tt>$1</tt>~g;
|
|---|
| 392 | $text =~ s~\\(?:texttt|tt|ttseries)\s*{(.*?)}~<tt>$1</tt>~g;
|
|---|
| 393 | $text =~ s~\\emph{(.*?)}~<em>$1</em>~g;
|
|---|
| 394 | $text =~ s~{\\(?:em|it)\s*(.*?)}~<em>$1</em>~g;
|
|---|
| 395 | $text =~ s~{\\(?:bf|bfseries)\s*(.*?)}~<strong>$1</strong>~g;
|
|---|
| 396 | $text =~ s~\\(?:textbf|bf|bfseries)\s*{(.*?)}~<strong>$1</strong>~g;
|
|---|
| 397 | } else {
|
|---|
| 398 | # remove tags for text-only
|
|---|
| 399 | $text =~ s~\\(?:textbf|bf|bfseries|em|emph|tt|rm|texttt)\b~ ~g;
|
|---|
| 400 | }
|
|---|
| 401 | $text =~ s ~ {\\sc\s+(.*?)} ~
|
|---|
| 402 | {<span style="font-variant:\ small-caps">$1</span>} ~gx;
|
|---|
| 403 | # ignore these font tags (if there are any left)
|
|---|
| 404 | # sf is sans-serif
|
|---|
| 405 | $text =~ s~\\(?:mdseries|textmd|bfseries|textbf|sffamily|sf|sc)\b~ ~;
|
|---|
| 406 | #### end font-related stuff ####
|
|---|
| 407 |
|
|---|
| 408 | ### remove all other commands with optional arguments... ###
|
|---|
| 409 | # don't remove commands without { }....
|
|---|
| 410 | # $text =~ s~\\\w+(\[.*?\])?\s*~~g;
|
|---|
| 411 | # $text =~ s~\\noopsort{[^}]+\}~~g;
|
|---|
| 412 | # verbatim
|
|---|
| 413 | $text =~ s~\\verb(.)(.*?)\1~verb_text($1)~ge;
|
|---|
| 414 | # remove tags, keep contents for \tag[optional]{contents}
|
|---|
| 415 | while ($text =~ s~\\\w+(\[.*?\])?{([^}]+)}~$2 ~g) {;} # all other commands
|
|---|
| 416 |
|
|---|
| 417 | # remove latex groupings { } (but not \{ or \} )
|
|---|
| 418 | while ($text =~ s/([^\\])[\{\}]/$1/g) {;} # needed for "...}{..."
|
|---|
| 419 | $text =~ s/^\{//; # remove { if first char
|
|---|
| 420 |
|
|---|
| 421 | # latex characters
|
|---|
| 422 | # spaces - nobr space (~), opt break (\-), append ("#" - bibtex only)
|
|---|
| 423 | $text =~ s/([^\\])~+/$1 /g; # non-breaking space "~"
|
|---|
| 424 | # optional break "\-"
|
|---|
| 425 | if ($text =~ m/[^&]\#/) { # concat macros (bibtex) but not HTML codes
|
|---|
| 426 | # the non-macro bits have quotes around them - we just remove quotes
|
|---|
| 427 | # XXX bibtex and latex differ here (for the '#' char)...
|
|---|
| 428 | $text =~ s/([^&])[\"\#]/$1/g;
|
|---|
| 429 | }
|
|---|
| 430 | # dashes. Convert (m|n)-dash into single dash for html.
|
|---|
| 431 | $text =~ s~\-\-+~\-~g;
|
|---|
| 432 |
|
|---|
| 433 | # quoted { } chars
|
|---|
| 434 | $text =~ s~\\{~{~g;
|
|---|
| 435 | $text =~ s~\\}~}~g;
|
|---|
| 436 |
|
|---|
| 437 | # spaces
|
|---|
| 438 | $text =~ s~\\ ~ ~g;
|
|---|
| 439 |
|
|---|
| 440 | # finally to protect against macro language...
|
|---|
| 441 | # greenstone-specific
|
|---|
| 442 | $text =~ s~\[~&\#91;~g;
|
|---|
| 443 | $text =~ s~\]~&\#93;~g;
|
|---|
| 444 | $text =~ s~(?<!\\)([\\_])~\\$1~g;
|
|---|
| 445 |
|
|---|
| 446 | if ($html_markup) {
|
|---|
| 447 | $text =~ s~\n{2,}~\n</p>\n<p>~g;
|
|---|
| 448 | return "<p>$text</p>";
|
|---|
| 449 | }
|
|---|
| 450 |
|
|---|
| 451 | return $text;
|
|---|
| 452 | }
|
|---|
| 453 |
|
|---|
| 454 | # only used by process_latex for \verb....
|
|---|
| 455 | sub verb_text {
|
|---|
| 456 | my $verbatim=shift;
|
|---|
| 457 | $verbatim =~ s/([{}_])/\\$1/g;
|
|---|
| 458 | return $verbatim;
|
|---|
| 459 | }
|
|---|
| 460 | # only used by process_latex_math
|
|---|
| 461 | # returns a unicode char if applicable, otherwise ascii
|
|---|
| 462 | sub math_fraction {
|
|---|
| 463 | my $num=$1;
|
|---|
| 464 | my $denom=$2;
|
|---|
| 465 |
|
|---|
| 466 | if ($num==1 && $denom==2) {return chr(0xc2).chr(0xbd)}
|
|---|
| 467 | if ($num==1 && $denom==4) {return chr(0xc2).chr(0xbc)}
|
|---|
| 468 | if ($num==3 && $denom==4) {return chr(0xc2).chr(0xbe)}
|
|---|
| 469 | return "$num/$denom";
|
|---|
| 470 | }
|
|---|
| 471 |
|
|---|
| 472 | sub process_latex_math {
|
|---|
| 473 |
|
|---|
| 474 | my $text = pop; # if given one or two args, this is the last one...
|
|---|
| 475 | my $html_markup=pop; # if given two args, this is the first one else undef
|
|---|
| 476 |
|
|---|
| 477 | $text =~ s~\\,~ ~g; # forces a space?
|
|---|
| 478 | $text =~ s~\\infty~infinity~g; # or unicode 0x221E...
|
|---|
| 479 |
|
|---|
| 480 | # use this one when more things can read 3-byte utf8 values like this!
|
|---|
| 481 | # $text =~ s~\\cup\b~\xe2\xc8\xaa~g; # union operator - unicode 0x222a
|
|---|
| 482 | $text =~ s~\\cup\b~ U ~g;
|
|---|
| 483 |
|
|---|
| 484 | $text =~ s~\\frac\s*{(.+?)}{(.+?)}~math_fraction($1,$2)~ge;
|
|---|
| 485 |
|
|---|
| 486 | if ($html_markup) {
|
|---|
| 487 | $text =~ s~\^{(.*?)}~<sup>$1</sup>~g; # a^b superscript
|
|---|
| 488 | $text =~ s~\^([^\{])~<sup>$1</sup>~g;
|
|---|
| 489 | $text =~ s~\_{(.*?)}~<sub>$1</sub>~g; # a_b subscript
|
|---|
| 490 | $text =~ s~\_([^\{])~<sub>$1</sub>~g;
|
|---|
| 491 |
|
|---|
| 492 | $text =~ s~\\ldots~…~g; # use html named entity for now
|
|---|
| 493 |
|
|---|
| 494 | # put all other command names in italics for now
|
|---|
| 495 | $text =~ s~\\([\w]+)~<i>$1</i> ~g;
|
|---|
| 496 | }
|
|---|
| 497 |
|
|---|
| 498 | # special cases, for some input files
|
|---|
| 499 | if ($text =~ m~^\\\w+$~) {
|
|---|
| 500 | $text="{" . $text . "}";
|
|---|
| 501 | }
|
|---|
| 502 |
|
|---|
| 503 | return $text;
|
|---|
| 504 | }
|
|---|
| 505 |
|
|---|
| 506 |
|
|---|
| 507 |
|
|---|
| 508 | sub latex_accents_to_utf8 {
|
|---|
| 509 |
|
|---|
| 510 | # note - this is really ugly, but it works. There may be a prettier way
|
|---|
| 511 | # of mapping latex accented chars to utf8, but we just brute force it here.
|
|---|
| 512 | # Also, this isn't complete - not every single possible accented letter
|
|---|
| 513 | # is in here yet, but most of the common ones are.
|
|---|
| 514 |
|
|---|
| 515 | my %utf8_chars =
|
|---|
| 516 | (
|
|---|
| 517 | # acutes
|
|---|
| 518 | '\'a' => chr(0xc3).chr(0xa1),
|
|---|
| 519 | '\'c' => chr(0xc4).chr(0x87),
|
|---|
| 520 | '\'e' => chr(0xc3).chr(0xa9),
|
|---|
| 521 | '\'i' => chr(0xc3).chr(0xad),
|
|---|
| 522 | '\'l' => chr(0xc3).chr(0xba),
|
|---|
| 523 | '\'n' => chr(0xc3).chr(0x84),
|
|---|
| 524 | '\'o' => chr(0xc3).chr(0xb3),
|
|---|
| 525 | '\'r' => chr(0xc5).chr(0x95),
|
|---|
| 526 | '\'s' => chr(0xc5).chr(0x9b),
|
|---|
| 527 | '\'u' => chr(0xc3).chr(0xba),
|
|---|
| 528 | '\'y' => chr(0xc3).chr(0xbd),
|
|---|
| 529 | '\'z' => chr(0xc5).chr(0xba),
|
|---|
| 530 | # graves
|
|---|
| 531 | '`a' => chr(0xc3).chr(0xa0),
|
|---|
| 532 | '`A' => chr(0xc3).chr(0x80),
|
|---|
| 533 | '`e' => chr(0xc3).chr(0xa8),
|
|---|
| 534 | '`E' => chr(0xc3).chr(0x88),
|
|---|
| 535 | '`i' => chr(0xc3).chr(0xac),
|
|---|
| 536 | '`I' => chr(0xc3).chr(0x8c),
|
|---|
| 537 | '`o' => chr(0xc3).chr(0xb2),
|
|---|
| 538 | '`O' => chr(0xc3).chr(0x92),
|
|---|
| 539 | '`u' => chr(0xc3).chr(0xb9),
|
|---|
| 540 | '`U' => chr(0xc3).chr(0x99),
|
|---|
| 541 | # circumflex
|
|---|
| 542 | '^a' => chr(0xc3).chr(0xa2),
|
|---|
| 543 | '^A' => chr(0xc3).chr(0x82),
|
|---|
| 544 | '^c' => chr(0xc4).chr(0x89),
|
|---|
| 545 | '^C' => chr(0xc4).chr(0x88),
|
|---|
| 546 | '^e' => chr(0xc3).chr(0xaa),
|
|---|
| 547 | '^E' => chr(0xc3).chr(0x8a),
|
|---|
| 548 | '^g' => chr(0xc4).chr(0x9d),
|
|---|
| 549 | '^G' => chr(0xc4).chr(0x9c),
|
|---|
| 550 | '^h' => chr(0xc4).chr(0xa5),
|
|---|
| 551 | '^H' => chr(0xc4).chr(0xa4),
|
|---|
| 552 | '^i' => chr(0xc3).chr(0xae),
|
|---|
| 553 | '^I' => chr(0xc3).chr(0x8e),
|
|---|
| 554 | '^j' => chr(0xc4).chr(0xb5),
|
|---|
| 555 | '^J' => chr(0xc4).chr(0xb4),
|
|---|
| 556 | '^o' => chr(0xc3).chr(0xb4),
|
|---|
| 557 | '^O' => chr(0xc3).chr(0x94),
|
|---|
| 558 | '^s' => chr(0xc5).chr(0x9d),
|
|---|
| 559 | '^S' => chr(0xc5).chr(0x9c),
|
|---|
| 560 | '^u' => chr(0xc3).chr(0xa2),
|
|---|
| 561 | '^U' => chr(0xc3).chr(0xbb),
|
|---|
| 562 | '^w' => chr(0xc5).chr(0xb5),
|
|---|
| 563 | '^W' => chr(0xc5).chr(0xb4),
|
|---|
| 564 | '^y' => chr(0xc5).chr(0xb7),
|
|---|
| 565 | '^Y' => chr(0xc5).chr(0xb6),
|
|---|
| 566 |
|
|---|
| 567 | # diaeresis
|
|---|
| 568 | '"a' => chr(0xc3).chr(0xa4),
|
|---|
| 569 | '"A' => chr(0xc3).chr(0x84),
|
|---|
| 570 | '"e' => chr(0xc3).chr(0xab),
|
|---|
| 571 | '"E' => chr(0xc3).chr(0x8b),
|
|---|
| 572 | '"i' => chr(0xc3).chr(0xaf),
|
|---|
| 573 | '"I' => chr(0xc3).chr(0x8f),
|
|---|
| 574 | '"\\\\i' => chr(0xc3).chr(0xaf),
|
|---|
| 575 | '"\\\\I' => chr(0xc3).chr(0x8f),
|
|---|
| 576 | '"o' => chr(0xc3).chr(0xb6),
|
|---|
| 577 | '"O' => chr(0xc3).chr(0x96),
|
|---|
| 578 | '"u' => chr(0xc3).chr(0xbc),
|
|---|
| 579 | '"U' => chr(0xc3).chr(0x9c),
|
|---|
| 580 | '"y' => chr(0xc3).chr(0xbf),
|
|---|
| 581 | '"Y' => chr(0xc3).chr(0xb8),
|
|---|
| 582 | # tilde
|
|---|
| 583 | '~A' => chr(0xc3).chr(0x83),
|
|---|
| 584 | '~N' => chr(0xc3).chr(0x91),
|
|---|
| 585 | '~O' => chr(0xc3).chr(0x95),
|
|---|
| 586 | '~a' => chr(0xc3).chr(0xa3),
|
|---|
| 587 | '~n' => chr(0xc3).chr(0xb1),
|
|---|
| 588 | '~o' => chr(0xc3).chr(0xb5),
|
|---|
| 589 | # caron - handled specially
|
|---|
| 590 | # double acute
|
|---|
| 591 | # ring
|
|---|
| 592 | # dot
|
|---|
| 593 | '.c' => chr(0xc4).chr(0x8b),
|
|---|
| 594 | '.C' => chr(0xc4).chr(0x8a),
|
|---|
| 595 | '.e' => chr(0xc4).chr(0x97),
|
|---|
| 596 | '.E' => chr(0xc4).chr(0x96),
|
|---|
| 597 | '.g' => chr(0xc4).chr(0xa1),
|
|---|
| 598 | '.G' => chr(0xc4).chr(0xa0),
|
|---|
| 599 | '.I' => chr(0xc4).chr(0xb0),
|
|---|
| 600 | '.z' => chr(0xc5).chr(0xbc),
|
|---|
| 601 | '.Z' => chr(0xc5).chr(0xbb),
|
|---|
| 602 | # macron
|
|---|
| 603 | '=a' => chr(0xc4).chr(0x81),
|
|---|
| 604 | '=A' => chr(0xc4).chr(0x80),
|
|---|
| 605 | '=e' => chr(0xc4).chr(0x93),
|
|---|
| 606 | '=E' => chr(0xc4).chr(0x92),
|
|---|
| 607 | '=i' => chr(0xc4).chr(0xab),
|
|---|
| 608 | '=I' => chr(0xc4).chr(0xaa),
|
|---|
| 609 | '=o' => chr(0xc4).chr(0x8d),
|
|---|
| 610 | '=O' => chr(0xc4).chr(0x8c),
|
|---|
| 611 | '=u' => chr(0xc4).chr(0xab),
|
|---|
| 612 | '=U' => chr(0xc4).chr(0xaa),
|
|---|
| 613 |
|
|---|
| 614 | # stroke - handled specially - see below
|
|---|
| 615 |
|
|---|
| 616 | # cedilla - handled specially
|
|---|
| 617 | );
|
|---|
| 618 |
|
|---|
| 619 | # these are one letter latex commands - we make sure they're not a longer
|
|---|
| 620 | # command name. eg {\d} is d+stroke, so careful of \d
|
|---|
| 621 | my %special_utf8_chars =
|
|---|
| 622 | (
|
|---|
| 623 | # breve
|
|---|
| 624 | 'u g' => chr(0xc4).chr(0x9f),
|
|---|
| 625 | 'u G' => chr(0xc4).chr(0x9e),
|
|---|
| 626 | 'u i' => chr(0xc4).chr(0xad),
|
|---|
| 627 | 'u I' => chr(0xc4).chr(0xac),
|
|---|
| 628 | 'u o' => chr(0xc5).chr(0x8f),
|
|---|
| 629 | 'u O' => chr(0xc5).chr(0x8e),
|
|---|
| 630 | 'u u' => chr(0xc5).chr(0xad),
|
|---|
| 631 | 'u U' => chr(0xc5).chr(0xac),
|
|---|
| 632 | 'u z' => chr(0xc5).chr(0xbe), # !!! no such char, but common mistake
|
|---|
| 633 | 'u Z' => chr(0xc5).chr(0xbd), # used instead of v Z !!!
|
|---|
| 634 | # caron
|
|---|
| 635 | 'v c' => chr(0xc4).chr(0x8d),
|
|---|
| 636 | 'v C' => chr(0xc4).chr(0x8c),
|
|---|
| 637 | 'v n' => chr(0xc5).chr(0x88),
|
|---|
| 638 | 'v N' => chr(0xc5).chr(0x87),
|
|---|
| 639 | 'v s' => chr(0xc5).chr(0xa1),
|
|---|
| 640 | 'v S' => chr(0xc5).chr(0xa5),
|
|---|
| 641 | 'v z' => chr(0xc5).chr(0xbe),
|
|---|
| 642 | 'v Z' => chr(0xc5).chr(0xbd),
|
|---|
| 643 | # cedilla
|
|---|
| 644 | 'c c' => chr(0xc3).chr(0xa7),
|
|---|
| 645 | 'c C' => chr(0xc3).chr(0x87),
|
|---|
| 646 | 'c g' => chr(0xc4).chr(0xa3),
|
|---|
| 647 | 'c G' => chr(0xc4).chr(0xa2),
|
|---|
| 648 | 'c k' => chr(0xc4).chr(0xb7),
|
|---|
| 649 | 'c K' => chr(0xc4).chr(0xb6),
|
|---|
| 650 | 'c l' => chr(0xc4).chr(0xbc),
|
|---|
| 651 | 'c L' => chr(0xc4).chr(0xbb),
|
|---|
| 652 | 'c n' => chr(0xc5).chr(0x86),
|
|---|
| 653 | 'c N' => chr(0xc5).chr(0x85),
|
|---|
| 654 | 'c r' => chr(0xc5).chr(0x97),
|
|---|
| 655 | 'c R' => chr(0xc5).chr(0x96),
|
|---|
| 656 | 'c s' => chr(0xc5).chr(0x9f),
|
|---|
| 657 | 'c S' => chr(0xc5).chr(0x9e),
|
|---|
| 658 | 'c t' => chr(0xc5).chr(0xa3),
|
|---|
| 659 | 'c T' => chr(0xc5).chr(0xa2),
|
|---|
| 660 | # double acute / Hungarian accent
|
|---|
| 661 | 'H O' => chr(0xc5).chr(0x90),
|
|---|
| 662 | 'H o' => chr(0xc5).chr(0x91),
|
|---|
| 663 | 'H U' => chr(0xc5).chr(0xb0),
|
|---|
| 664 | 'H u' => chr(0xc5).chr(0xb1),
|
|---|
| 665 |
|
|---|
| 666 | # stroke
|
|---|
| 667 | 'd' => chr(0xc4).chr(0x91),
|
|---|
| 668 | 'D' => chr(0xc4).chr(0x90),
|
|---|
| 669 | 'h' => chr(0xc4).chr(0xa7),
|
|---|
| 670 | # 'H' => chr(0xc4).chr(0xa6), # !! this normally(!!?) means Hung. umlaut
|
|---|
| 671 | 'i' => chr(0xc4).chr(0xb1), # dotless lowercase i
|
|---|
| 672 | 'l' => chr(0xc5).chr(0x82),
|
|---|
| 673 | 'L' => chr(0xc5).chr(0x81),
|
|---|
| 674 | 'o' => chr(0xc3).chr(0xb8),
|
|---|
| 675 | 'O' => chr(0xc3).chr(0x98),
|
|---|
| 676 | 't' => chr(0xc5).chr(0xa7),
|
|---|
| 677 | 'T' => chr(0xc5).chr(0xa6),
|
|---|
| 678 |
|
|---|
| 679 | # other special chars
|
|---|
| 680 | 'ss' => chr(0xc3).chr(0x9f), # german ss/szlig/sharp s
|
|---|
| 681 | 'aa' =>,chr(0xc3).chr(0xa5), # scandanavian/latin a with ring
|
|---|
| 682 | );
|
|---|
| 683 |
|
|---|
| 684 | my $self=shift;
|
|---|
| 685 | my $textref=shift;
|
|---|
| 686 |
|
|---|
| 687 | my $outhandle=$self->{'outhandle'};
|
|---|
| 688 | my $text=$$textref;
|
|---|
| 689 |
|
|---|
| 690 | # remove space (if any) between \ and letter to accent (eg {\' a})
|
|---|
| 691 | $text =~ s!(\\[`'="^~\.])\s(\w)\b!$1$2!g; # for emacs indenting... `]);
|
|---|
| 692 |
|
|---|
| 693 | # remove {} around a single character (eg \'{e})
|
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| 694 | $text =~ s!(\\[`'="^~\.]){(\w)}!{$1$2}!g; # for emacs indenting... `]);
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| 695 |
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| 696 | ## only in bibtex... not in latex proper?!
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| 697 | ### \, is another way of doing cedilla \c
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| 698 | ##$text =~ s~\\,(.)~\\c $1~g;
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| 699 |
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| 700 | # remove {} around a single character for special 1 letter commands -
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| 701 | # need to insert a space. Eg \v{s} -> {\v s}
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| 702 | $text =~ s~(\\[uvcH]){(\w)}~{$1 $2}~g;
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| 703 |
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| 704 | # only do if the text contains a '\' character.
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| 705 | if ($text =~ m|\\|) {
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| 706 | # "normal" accents - ie non-alpha latex tag
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| 707 | # xxx used to have ([\w]\b)@ (for word boundary)
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| 708 | while ($text =~ m/\\([`'="^~\.])([\w])/) { # for emacs `])){
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| 709 | my $tex="$1$2"; my $char="$2";
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| 710 | my $replacement=$utf8_chars{$tex};
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| 711 | if (!defined($replacement)) {
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| 712 | $text =~ m~(.{20}\\\Q$tex\E.{20})~s;
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| 713 | print $outhandle . $self->{'plugin_type'} .
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| 714 | ": Warning: unknown latex accent \"$tex\""
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| 715 | . " in \"$1\"\n";
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| 716 | $replacement=$char;
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| 717 | }
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| 718 | $text =~ s/\\\Q$tex/$replacement/g;
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| 719 | }
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| 720 |
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| 721 | # where the following letter matters (eg "sm\o rrebr\o d", \ss{})
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| 722 | # only do the change if immediately followed by a space, }, {, or \
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| 723 | # one letter accents ( + ss / aa)
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| 724 | while ($text =~ m~\\([DdhiLlOoTt]|ss|aa)[{}\s\"\\]~) {
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| 725 | my $tex=$1;
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| 726 | my $replacement=$special_utf8_chars{$tex};
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| 727 | if (!defined($replacement)) {
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| 728 | $text =~ m~(.{20}\\\Q$tex\E.{20})~s;
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| 729 | print $outhandle $self->{'plugin_type'} .
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| 730 | ": Warning: unknown latex accent \"$tex\""
|
|---|
| 731 | . " in \"$1\"\n";
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| 732 | $replacement=$tex;
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| 733 | }
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| 734 | ($text =~ s/{\\$tex}/$replacement/g) or
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| 735 | $text =~ s/\\$tex([{}\s\"\\])/$replacement$1/g;
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| 736 |
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| 737 | }
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| 738 |
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| 739 | # one letter latex accent commands that affect following letter
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| 740 | while ($text =~ m~\\([uvcH]) ([\w])~) {
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| 741 | my $tex="$1 $2"; my $char="$2";
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| 742 | my $replacement=$special_utf8_chars{$tex};
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| 743 | if (!defined($replacement)) {
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| 744 | $text =~ m~(.{20}\\\Q$tex\E.{20})~s;
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| 745 | print $outhandle $self->{'plugin_type'} .
|
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| 746 | ": Warning: unknown latex accent \"$tex\""
|
|---|
| 747 | . " in \"$1\"\n";
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| 748 | $replacement=$char;
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| 749 | }
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| 750 | $text =~ s/\\$tex/$replacement/g;
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| 751 | }
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| 752 | }
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| 753 | $textref=\$text;
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| 754 | }
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| 755 |
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| 756 |
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| 757 | # modules must return true
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| 758 | 1;
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