| 1 | ###########################################################################
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| 2 | #
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| 3 | # BibTexPlug.pm - a plugin for bibliography records in BibTex format
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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 | # Copyright 2000 Gordon W. Paynter
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| 10 | # Copyright 1999-2001 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 | # You should have received a copy of the GNU General Public License
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| 23 | # along with this program; if not, write to the Free Software
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| 24 | # Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 25 | #
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| 26 | ###########################################################################
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| 27 |
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| 28 |
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| 29 | # BibTexPlug reads bibliography files in BibTex format.
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| 30 | #
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| 31 | # by Gordon W. Paynter ([email protected]), November 2000
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| 32 | # Based on ReferPlug. See ReferPlug for geneology.
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| 33 | #
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| 34 | # BibTexPlug creates a document object for every reference a the file.
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| 35 | # It is a subclass of SplitPlug, so if there are multiple records, all
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| 36 | # are read.
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| 37 | #
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| 38 | # Modified Dec 2001 by John McPherson:
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| 39 | # * some modifications submitted by Sergey Yevtushenko
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| 40 | # <[email protected]>
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| 41 | # * some non-ascii char support (ie mostly Latin)
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| 42 | # * The raw ascii bibtex entry is stored as "BibTex" metadata.
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| 43 |
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| 44 | package BibTexPlug;
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| 45 |
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| 46 | use SplitPlug;
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| 47 |
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| 48 | # BibTexPlug is a sub-class of BasPlug.
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| 49 | sub BEGIN {
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| 50 | @ISA = ('SplitPlug');
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| 51 | }
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| 52 |
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| 53 | # This plugin processes files with the suffix ".bib"
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| 54 | sub get_default_process_exp {
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| 55 | return q^(?i)\.bib$^;
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| 56 | }
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| 57 |
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| 58 | # This plugin splits the input text at blank lines
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| 59 | sub get_default_split_exp {
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| 60 | return q^\n+(?=@)^;
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| 61 | }
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| 62 |
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| 63 |
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| 64 |
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| 65 | # The process function reads a single bibliographic record and stores
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| 66 | # it as a new document.
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| 67 |
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| 68 | sub process {
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| 69 | my $self = shift (@_);
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| 70 | my ($textref, $pluginfo, $base_dir, $file, $metadata, $doc_obj) = @_;
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| 71 | my $outhandle = $self->{'outhandle'};
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| 72 |
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| 73 | $self->{'key'} = "default";
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| 74 |
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| 75 | # Check that we're dealing with a valid BibTex record
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| 76 | return undef unless ($$textref =~ /^@\w+\{.*\}/s);
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| 77 |
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| 78 | # Ignore things we can't use
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| 79 | return 0 if ($$textref =~ /^\@String/);
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| 80 |
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| 81 | # Report that we're processing the file
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| 82 | print $outhandle "BibTexPlug: processing $file\n"
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| 83 | if ($self->{'verbosity'}) > 1;
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| 84 |
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| 85 |
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| 86 | # This hash translates BibTex field names into metadata names. The
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| 87 | # BibTex names are taken from the "Local Guide to Latex" Graeme
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| 88 | # McKinstry. Metadata names are consistent with ReferPlug.
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| 89 |
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| 90 | my %field = (
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| 91 | 'address', 'PublisherAddress',
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| 92 | 'author', 'Creator',
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| 93 |
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| 94 | 'booktitle', 'Booktitle',
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| 95 | 'chapter', 'Chapter',
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| 96 | 'edition', 'Edition',
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| 97 | 'editor', 'Editor',
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| 98 | 'institution', 'Publisher',
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| 99 | 'journal', 'Journal',
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| 100 | 'month', 'Month',
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| 101 | 'number', 'Number',
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| 102 | 'pages', 'Pages',
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| 103 | 'publisher', 'Publisher',
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| 104 | 'school', 'Publisher',
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| 105 | 'title', 'Title',
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| 106 | 'volume', 'Volume',
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| 107 | 'year', 'Date',
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| 108 |
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| 109 | 'keywords', 'Keywords',
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| 110 | 'abstract', 'Abstract',
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| 111 | 'copyright', 'Copyright'
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| 112 | );
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| 113 |
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| 114 | # Metadata fields
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| 115 | my %metadata;
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| 116 | my ($EntryType, $EntryID, $Creator, $Keywords, $text);
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| 117 |
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| 118 | my $verbosity = $self->{'verbosity'};
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| 119 | $verbosity = 0 unless $verbosity;
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| 120 |
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| 121 | my $lines=$$textref;
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| 122 |
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| 123 | # Make sure the text has exactly one entry per line
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| 124 |
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| 125 | $lines =~ s/^\s*(\@[^,]+,)\s*\n/$1=====/; #splitting key in entry
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| 126 | $lines =~ s/([\"\}]\s*,)\s*\n/$1=====/g; #splitting by comma, followed by \n (assuming end of lines are " or })
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| 127 | $lines =~ s/(\d+\s*\,)\s*\n/$1=====/g; #for the case, when we have number entry without closing "
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| 128 | $lines =~ s/\n\s*\n/%%%%%/g; #this was simply added in order to allow to process newline inside quoted strings,
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| 129 | #that continues for several lines
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| 130 | $lines =~ s/\s+/ /g;
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| 131 | $lines =~ s/\s*=====\s*/\n/g;
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| 132 |
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| 133 | my @all_lines = split(/\n+/, $lines);
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| 134 |
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| 135 | # Read and process each line in the bib file.
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| 136 | my ($entryname, $name, $value, $line);
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| 137 | foreach $line (@all_lines) {
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| 138 |
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| 139 | # Add each line. Most lines consist of a field identifer and
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| 140 | # then data, and we simply store them, though we treat some
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| 141 | # of the fields a bit differently.
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| 142 |
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| 143 | $line =~ s/\s+/ /g;
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| 144 | $text .= "$line\n";
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| 145 |
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| 146 | print "Processing line = $line \n" if $verbosity>=4;
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| 147 |
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| 148 | # The first line is special, it contains the reference type and OID
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| 149 | if ($line =~ /\@(\w+)\W*\{\W*([\*\.\w\d:-]+)\W*$/) {
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| 150 | $EntryType = $1;
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| 151 | $EntryID = $2;
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| 152 | print "** $EntryType - \"$EntryID\" \n"
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| 153 | if ($verbosity >= 4);
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| 154 | $self->{'key'} = $EntryID;
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| 155 | next;
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| 156 | }
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| 157 | if ($line =~ /\@/) {
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| 158 | print $outhandle "bibtexplug: suspect line in bibtex file: $line\n"
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| 159 | if ($verbosity >= 2);
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| 160 | print $outhandle "bibtexplug: if that's the start of a new bibtex record ammend regexp in bibtexplug::process()\n"
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| 161 | if ($verbosity >= 2);
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| 162 | }
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| 163 |
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| 164 | # otherwise, parse the metadata out of this line
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| 165 | next unless ($line =~ /^\s*(\w+)\s+=\s+(.*)/);
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| 166 | $entryname = lc($1);
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| 167 | $value = $2;
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| 168 | $value =~ s/,?\s*$//; # remove trailing comma and space
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| 169 | if ($value =~ /^"/ && $value =~ /"$/) {
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| 170 | # remove surrounding " marks
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| 171 | $value =~ s/^"//; $value =~ s/"$//;
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| 172 | }
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| 173 | $value = &process_latex($value);
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| 174 |
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| 175 | # Add this line of metadata
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| 176 | $metadata{$entryname} .= "$value\n";
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| 177 |
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| 178 | }
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| 179 |
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| 180 | # Add the Entry type as metadata
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| 181 | $doc_obj->add_utf8_metadata ($cursection, "EntryType", $EntryType);
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| 182 |
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| 183 | # Add the various field as metadata
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| 184 | foreach my $entryname (keys %metadata) {
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| 185 | next unless (defined $field{$entryname});
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| 186 | next unless (defined $metadata{$entryname});
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| 187 |
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| 188 | $name = $field{$entryname};
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| 189 | $value = $metadata{$entryname};
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| 190 |
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| 191 | # Add the various fields as metadata
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| 192 | my $html_value = &text_into_html($value);
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| 193 | $doc_obj->add_utf8_metadata ($cursection, $name, $html_value);
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| 194 |
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| 195 | # Several special operatons on metadata follow
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| 196 |
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| 197 | # Add individual keywords.
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| 198 | # The full set of keywords will be added, in due course, as "Keywords".
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| 199 | # However, we also want to add them as individual "Keyword" metadata elements.
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| 200 | if ($entryname eq "keywords") {
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| 201 | my @keywordlist = split(/,/, $value);
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| 202 | foreach my $k (@keywordlist) {
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| 203 | $k = lc($k);
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| 204 | $k =~ s/\s*$//;
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| 205 | $k =~ s/^\s*//;
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| 206 | if ($k =~ /\w/) {
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| 207 | $k = &text_into_html($k);
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| 208 | $doc_obj->add_utf8_metadata ($cursection, "Keyword", $k);
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| 209 | }
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| 210 | }
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| 211 | }
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| 212 |
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| 213 | # Add individual authors
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| 214 | # The author metadata will be stored as one "Creator" entry, but we
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| 215 | # also want to split it into several individual "Author" fields in
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| 216 | # "Lastname, Firstnames" format so we can browse it.
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| 217 | if ($entryname eq "author") { #added also comparison with editor
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| 218 |
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| 219 | # und here for german language...
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| 220 | # don't use brackets in pattern, else the matched bit becomes
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| 221 | # an element in the list!
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| 222 | my @authorlist = split(/,|\s+and\s+|\s+und\s+/, $value);
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| 223 | foreach $a (@authorlist) {
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| 224 | $a =~ s/\s*$//;
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| 225 | $a =~ s/^\s*//;
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| 226 | # Reformat and add author name
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| 227 | next if $a=~ /^\s*$/;
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| 228 | my @words = split(/ /, $a);
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| 229 | my $lastname = pop @words;
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| 230 | my $firstname = join(" ", @words);
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| 231 |
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| 232 | my $fullname = $lastname . ", " . $firstname;
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| 233 |
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| 234 | # Add each name to set of Authors
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| 235 | # force utf8 pragma so that \w matches in this scope
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| 236 | use utf8;
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| 237 | if ($fullname =~ /\w+, \w+/) {
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| 238 | $doc_obj->add_utf8_metadata ($cursection, "Author", $fullname);
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| 239 | }
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| 240 | }
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| 241 | }
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| 242 |
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| 243 | # Books and Journals are additionally marked for display purposes
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| 244 | if ($entryname eq "booktitle") {
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| 245 | $doc_obj->add_utf8_metadata($cursection, "BookConfOnly", 1);
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| 246 | } elsif ($entryname eq "journal") {
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| 247 | $doc_obj->add_utf8_metadata($cursection, "JournalsOnly", 1);
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| 248 | }
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| 249 |
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| 250 | }
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| 251 |
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| 252 | # Add the text in BibTex format (all fields)
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| 253 | if ($text =~ /\w/) {
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| 254 | $text = &text_into_html($text);
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| 255 | $doc_obj->add_utf8_text ($cursection, $text);
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| 256 | $doc_obj->add_utf8_metadata($cursection, "BibTex", $text);
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| 257 | }
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| 258 |
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| 259 | return 1;
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| 260 | }
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| 261 |
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| 262 |
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| 263 |
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| 264 |
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| 265 | # convert email addresses and URLs into links
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| 266 | sub convert_urls_into_links{
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| 267 | my ($text) = @_;
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| 268 |
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| 269 | $text =~ s/([\w\d\.\-]+@[\w\d\.\-]+)/<a href=\"mailto:$1\">$1<\/a>/g;
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| 270 | $text =~ s/(http:\/\/[\w\d\.\-]+[\/\w\d\.\-]*)/<a href=\"$1">$1<\/a>/g;
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| 271 |
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| 272 | return $text;
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| 273 | }
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| 274 |
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| 275 | # Clean up whitespace and convert \n charaters to <BR> or <P>
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| 276 | sub clean_up_whitespaces{
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| 277 | my ($text) = @_;
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| 278 |
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| 279 | $text =~ s/%%%%%/<BR> <BR>/g;
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| 280 | $text =~ s/ +/ /g;
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| 281 | $text =~ s/\s*$//;
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| 282 | $text =~ s/^\s*//;
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| 283 | $text =~ s/\n/\n<BR>/g;
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| 284 | $text =~ s/<BR>\s*<BR>/<P>/g;
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| 285 |
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| 286 | return $text;
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| 287 | }
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| 288 |
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| 289 |
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| 290 | sub convert_problem_characters_without_ampersand{
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| 291 | my ($text) = @_;
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| 292 | $text =~ s/</</g;
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| 293 | $text =~ s/>/>/g;
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| 294 |
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| 295 | $text =~ s/\'\'/\"/g; #Latex -specific conversion
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| 296 | $text =~ s/\`\`/\"/g; #Latex -specific conversion
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| 297 |
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| 298 |
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| 299 | $text =~ s/\"/"/g;
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| 300 | $text =~ s/\'/’/g;
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| 301 | $text =~ s/\`/‘/g;
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| 302 | $text =~ s/\+/ /g;
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| 303 | $text =~ s/\(/ /g;
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| 304 | $text =~ s/\)/ /g;
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| 305 |
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| 306 | $text =~ s/\\/\\\\/g;
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| 307 |
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| 308 | $text =~ s/\./\\\./g;
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| 309 |
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| 310 | return $text;
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| 311 | }
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| 312 |
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| 313 | # Convert a text string into HTML.
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| 314 |
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| 315 | # The HTML is going to be inserted into a GML file, so we have to be
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| 316 | # careful not to use symbols like ">", which occurs frequently in email
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| 317 | # messages (and use > instead.
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| 318 |
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| 319 | # This function also turns URLs and email addresses into links, and
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| 320 | # replaces carriage returns with <BR> tags (and multiple carriage returns
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| 321 | # with <P> tags).
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| 322 |
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| 323 | sub text_into_html {
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| 324 | my ($text) = @_;
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| 325 |
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| 326 | # Convert problem characters into HTML symbols
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| 327 | $text =~ s/&/&/g;
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| 328 |
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| 329 | $text = &convert_problem_characters_without_ampersand( $text );
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| 330 |
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| 331 | # convert email addresses and URLs into links
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| 332 | $text = &convert_urls_into_links( $text );
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| 333 |
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| 334 | $text = &clean_up_whitespaces( $text );
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| 335 |
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| 336 | return $text;
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| 337 | }
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| 338 |
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| 339 |
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| 340 |
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| 341 |
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| 342 | # Convert accented characters, remove { }, interprete some commands....
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| 343 | # Note!! This is not comprehensive! Also assumes Latin -> Unicode!
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| 344 | sub process_latex {
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| 345 | my ($text) = @_;
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| 346 |
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| 347 | # note - this is really ugly, but it works. There may be a prettier way
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| 348 | # of mapping latex accented chars to utf8, but we just brute force it here.
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| 349 | # Also, this isn't complete - not every single possible accented letter
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| 350 | # is in here yet, but most of the common ones are.
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| 351 |
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| 352 | my %utf8_chars =
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| 353 | (
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| 354 | # acutes
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| 355 | '\'a' => chr(0xc3).chr(0xa1),
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| 356 | '\'c' => chr(0xc4).chr(0x87),
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| 357 | '\'e' => chr(0xc3).chr(0xa9),
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| 358 | '\'i' => chr(0xc3).chr(0xad),
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| 359 | '\'l' => chr(0xc3).chr(0xba),
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| 360 | '\'n' => chr(0xc3).chr(0x84),
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| 361 | '\'o' => chr(0xc3).chr(0xb3),
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| 362 | '\'r' => chr(0xc5).chr(0x95),
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| 363 | '\'s' => chr(0xc5).chr(0x9b),
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| 364 | '\'u' => chr(0xc3).chr(0xba),
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| 365 | '\'y' => chr(0xc3).chr(0xbd),
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| 366 | '\'z' => chr(0xc5).chr(0xba),
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| 367 | # graves
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| 368 | '`a' => chr(0xc3).chr(0xa0),
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| 369 | '`A' => chr(0xc3).chr(0x80),
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| 370 | '`e' => chr(0xc3).chr(0xa8),
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| 371 | '`E' => chr(0xc3).chr(0x88),
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| 372 | '`i' => chr(0xc3).chr(0xac),
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| 373 | '`I' => chr(0xc3).chr(0x8c),
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| 374 | '`o' => chr(0xc3).chr(0xb2),
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| 375 | '`O' => chr(0xc3).chr(0x92),
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| 376 | '`u' => chr(0xc3).chr(0xb9),
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| 377 | '`U' => chr(0xc3).chr(0x99),
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| 378 | # circumflex
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| 379 | '^a' => chr(0xc3).chr(0xa2),
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| 380 | '^A' => chr(0xc3).chr(0x82),
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| 381 | '^c' => chr(0xc4).chr(0x89),
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| 382 | '^C' => chr(0xc4).chr(0x88),
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| 383 | '^e' => chr(0xc3).chr(0xaa),
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| 384 | '^E' => chr(0xc3).chr(0x8a),
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| 385 | '^g' => chr(0xc4).chr(0x9d),
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| 386 | '^G' => chr(0xc4).chr(0x9c),
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| 387 | '^h' => chr(0xc4).chr(0xa5),
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| 388 | '^H' => chr(0xc4).chr(0xa4),
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| 389 | '^i' => chr(0xc3).chr(0xae),
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| 390 | '^I' => chr(0xc3).chr(0x8e),
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| 391 | '^j' => chr(0xc4).chr(0xb5),
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| 392 | '^J' => chr(0xc4).chr(0xb4),
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| 393 | '^o' => chr(0xc3).chr(0xb4),
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| 394 | '^O' => chr(0xc3).chr(0x94),
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| 395 | '^s' => chr(0xc5).chr(0x9d),
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| 396 | '^S' => chr(0xc5).chr(0x9c),
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| 397 | '^u' => chr(0xc3).chr(0xa2),
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| 398 | '^U' => chr(0xc3).chr(0xbb),
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| 399 | '^w' => chr(0xc5).chr(0xb5),
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| 400 | '^W' => chr(0xc5).chr(0xb4),
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| 401 | '^y' => chr(0xc5).chr(0xb7),
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| 402 | '^Y' => chr(0xc5).chr(0xb6),
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| 403 |
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| 404 | # diaeresis
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|---|
| 405 | '"a' => chr(0xc3).chr(0xa4),
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| 406 | '"A' => chr(0xc3).chr(0x84),
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| 407 | '"e' => chr(0xc3).chr(0xab),
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| 408 | '"E' => chr(0xc3).chr(0x8b),
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| 409 | '"\\\\i' => chr(0xc3).chr(0xaf),
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| 410 | '"\\\\I' => chr(0xc3).chr(0x8f),
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| 411 | '"o' => chr(0xc3).chr(0xb6),
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| 412 | '"O' => chr(0xc3).chr(0x96),
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| 413 | '"u' => chr(0xc3).chr(0xbc),
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| 414 | '"U' => chr(0xc3).chr(0x9c),
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| 415 | '"y' => chr(0xc3).chr(0xbf),
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| 416 | '"Y' => chr(0xc3).chr(0xb8),
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|---|
| 417 | # tilde
|
|---|
| 418 | # caron - handled specially
|
|---|
| 419 | # ',s' => chr(0xc5).chr(0xa1),
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|---|
| 420 | # ',S' => chr(0xc5).chr(0xa5),
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|---|
| 421 | # breve
|
|---|
| 422 | # double acute
|
|---|
| 423 | # ring
|
|---|
| 424 | # dot
|
|---|
| 425 | '\.c' => chr(0xc4).chr(0x8b),
|
|---|
| 426 | '\.C' => chr(0xc4).chr(0x8a),
|
|---|
| 427 | '\.e' => chr(0xc4).chr(0x97),
|
|---|
| 428 | '\.E' => chr(0xc4).chr(0x96),
|
|---|
| 429 | '\.g' => chr(0xc4).chr(0xa1),
|
|---|
| 430 | '\.G' => chr(0xc4).chr(0xa0),
|
|---|
| 431 | '\.I' => chr(0xc4).chr(0xb0),
|
|---|
| 432 | '\.z' => chr(0xc5).chr(0xbc),
|
|---|
| 433 | '\.Z' => chr(0xc5).chr(0xbb),
|
|---|
| 434 | # macron
|
|---|
| 435 | '=a' => chr(0xc4).chr(0x81),
|
|---|
| 436 | '=A' => chr(0xc4).chr(0x80),
|
|---|
| 437 | '=e' => chr(0xc4).chr(0x93),
|
|---|
| 438 | '=E' => chr(0xc4).chr(0x92),
|
|---|
| 439 | '=i' => chr(0xc4).chr(0xab),
|
|---|
| 440 | '=I' => chr(0xc4).chr(0xaa),
|
|---|
| 441 | '=o' => chr(0xc4).chr(0x8d),
|
|---|
| 442 | '=O' => chr(0xc4).chr(0x8c),
|
|---|
| 443 | '=u' => chr(0xc4).chr(0xab),
|
|---|
| 444 | '=U' => chr(0xc4).chr(0xaa),
|
|---|
| 445 |
|
|---|
| 446 | # stroke - handled specially - see below
|
|---|
| 447 |
|
|---|
| 448 | # cedilla - handled specially
|
|---|
| 449 |
|
|---|
| 450 | );
|
|---|
| 451 |
|
|---|
| 452 | # these are one letter latex commands - we make sure they're not a longer
|
|---|
| 453 | # command name. eg {\d} is d+stroke, so careful of \d
|
|---|
| 454 | my %special_utf8_chars =
|
|---|
| 455 | (
|
|---|
| 456 | # caron
|
|---|
| 457 | 'v n' => chr(0xc5).chr(0x88),
|
|---|
| 458 | 'v N' => chr(0xc5).chr(0x87),
|
|---|
| 459 | 'v s' => chr(0xc5).chr(0xa1),
|
|---|
| 460 | 'v S' => chr(0xc5).chr(0xa5),
|
|---|
| 461 | # cedilla
|
|---|
| 462 | 'c c' => chr(0xc3).chr(0xa7),
|
|---|
| 463 | 'c C' => chr(0xc3).chr(0x87),
|
|---|
| 464 | 'c g' => chr(0xc4).chr(0xa3),
|
|---|
| 465 | 'c G' => chr(0xc4).chr(0xa2),
|
|---|
| 466 | 'c k' => chr(0xc4).chr(0xb7),
|
|---|
| 467 | 'c K' => chr(0xc4).chr(0xb6),
|
|---|
| 468 | 'c l' => chr(0xc4).chr(0xbc),
|
|---|
| 469 | 'c L' => chr(0xc4).chr(0xbb),
|
|---|
| 470 | 'c n' => chr(0xc5).chr(0x86),
|
|---|
| 471 | 'c N' => chr(0xc5).chr(0x85),
|
|---|
| 472 | 'c r' => chr(0xc5).chr(0x97),
|
|---|
| 473 | 'c R' => chr(0xc5).chr(0x96),
|
|---|
| 474 | 'c s' => chr(0xc5).chr(0x9f),
|
|---|
| 475 | 'c S' => chr(0xc5).chr(0x9e),
|
|---|
| 476 | 'c t' => chr(0xc5).chr(0xa3),
|
|---|
| 477 | 'c T' => chr(0xc5).chr(0xa2),
|
|---|
| 478 | # double acute / Hungarian accent
|
|---|
| 479 | 'H O' => chr(0xc5).chr(0x90),
|
|---|
| 480 | 'H o' => chr(0xc5).chr(0x91),
|
|---|
| 481 | 'H U' => chr(0xc5).chr(0xb0),
|
|---|
| 482 | 'H u' => chr(0xc5).chr(0xb1),
|
|---|
| 483 |
|
|---|
| 484 | # stroke
|
|---|
| 485 | 'd' => chr(0xc4).chr(0x91),
|
|---|
| 486 | 'D' => chr(0xc4).chr(0x90),
|
|---|
| 487 | 'h' => chr(0xc4).chr(0xa7),
|
|---|
| 488 | # 'H' => chr(0xc4).chr(0xa6), # !! this normally(!!?) means Hung. umlaut
|
|---|
| 489 | 'i' => chr(0xc4).chr(0xb1), # dotless lowercase i
|
|---|
| 490 | 'l' => chr(0xc5).chr(0x82),
|
|---|
| 491 | 'L' => chr(0xc5).chr(0x81),
|
|---|
| 492 | 'o' => chr(0xc3).chr(0xb8),
|
|---|
| 493 | 'O' => chr(0xc3).chr(0x98),
|
|---|
| 494 | 't' => chr(0xc5).chr(0xa7),
|
|---|
| 495 | 'T' => chr(0xc5).chr(0xa6),
|
|---|
| 496 | # german ss/szlig/sharp s
|
|---|
| 497 | 'ss' => chr(0xc3).chr(0x9f),
|
|---|
| 498 | );
|
|---|
| 499 |
|
|---|
| 500 | # convert latex-style accented characters.
|
|---|
| 501 | # remove space (if any) between \ and letter to accent (eg {\' a})
|
|---|
| 502 |
|
|---|
| 503 | $text =~ s@(\\[`'="])\s(\w)@$1$2@g;
|
|---|
| 504 |
|
|---|
| 505 | # remove {} around a single character (eg \'{e})
|
|---|
| 506 | $text =~ s@(\\[`'="\.]){(\w)}@$1$2@g;
|
|---|
| 507 |
|
|---|
| 508 | # remove {} around a single character for special 1 letter commands -
|
|---|
| 509 | # need to insert a space. Eg \v{s} -> {\v s}
|
|---|
| 510 | $text =~ s@(\\[vcH]){(\w)}@{$1 $2}@;
|
|---|
| 511 |
|
|---|
| 512 | # this is slow (go through whole hash for each substitution!) so
|
|---|
| 513 | # only do if the text contains a '\' character.
|
|---|
| 514 | if ($text =~ m|\\|) {
|
|---|
| 515 | for $latex_code (keys %utf8_chars) {
|
|---|
| 516 | $text =~ s/\\$latex_code/$utf8_chars{$latex_code}/g;
|
|---|
| 517 | }
|
|---|
| 518 |
|
|---|
| 519 | # where the following letter matters (eg "sm\o rrebr\o d", \ss{})
|
|---|
| 520 | # only do the change if immediately followed by a space, }, {, or \
|
|---|
| 521 | for $latex_code (keys %special_utf8_chars) {
|
|---|
| 522 | $text =~ s/\\${latex_code}([\\\s\{\}])/$special_utf8_chars{$latex_code}$1/g;
|
|---|
| 523 | }
|
|---|
| 524 | }
|
|---|
| 525 |
|
|---|
| 526 | # remove latex commands
|
|---|
| 527 | $text =~ s@\\\w+{([^}]*)}@$1@g;
|
|---|
| 528 |
|
|---|
| 529 | # remove latex groupings { } (but not \{ or \} )
|
|---|
| 530 | $text =~ s/([^\\])\{/$1/g;
|
|---|
| 531 | $text =~ s/([^\\])\}/$1/g;
|
|---|
| 532 | $text =~ s/^{//; # remove { if first char
|
|---|
| 533 |
|
|---|
| 534 | # maths mode $...$ - this is not interpreted in any way at the moment...
|
|---|
| 535 | $text =~ s@\$(.*)\$@$1@g;
|
|---|
| 536 |
|
|---|
| 537 | # quoted { } chars
|
|---|
| 538 | $text =~ s@\\{@{@g;
|
|---|
| 539 | $text =~ s@\\}@}@g;
|
|---|
| 540 |
|
|---|
| 541 | return $text;
|
|---|
| 542 | }
|
|---|
| 543 |
|
|---|
| 544 |
|
|---|
| 545 | sub set_OID {
|
|---|
| 546 | my $self = shift (@_);
|
|---|
| 547 | my ($doc_obj, $id, $segment_number) = @_;
|
|---|
| 548 |
|
|---|
| 549 | if ( $self->{'key'} eq "default") {
|
|---|
| 550 | $doc_obj->set_OID();
|
|---|
| 551 | } else {
|
|---|
| 552 | $doc_obj->set_OID($self->{'key'});
|
|---|
| 553 | }
|
|---|
| 554 | }
|
|---|
| 555 |
|
|---|
| 556 | 1;
|
|---|
