1 package Text::Tradition::Witness;
6 use Moose::Util::TypeConstraints;
7 use Text::TEI::Markup qw( word_tag_wrap );
9 use XML::Easy::Syntax qw( $xml10_name_rx );
13 Text::Tradition::Witness - a manuscript witness to a text tradition
17 use Text::Tradition::Witness;
18 my $w = Text::Tradition::Witness->new(
20 'identifier' => 'Oxford MS Ex.1932',
25 Text::Tradition::Witness is an object representation of a manuscript
26 witness to a text tradition. A manuscript has a sigil (a short code that
27 represents it in the wider tradition), an identifier (e.g. the library ID),
34 Create a new witness. Options include:
38 =item * sigil - A short code to represent the manuscript. Required.
40 =item * sourcetype - What sort of witness data this is. Options are
41 'xmldesc', 'plaintext', 'json', or 'collation' (the last should only be
42 used by Collation parsers.)
48 The data source for the witness. Use the appropriate option.
50 =item * use_text - An initialization option. If the witness is read from a
51 TEI document and more than one <text/> tag exists therein, the default
52 behavior is to use the first defined text. If this is not desired,
53 use_text should be set to an XPath expression that will select the correct
56 =item * identifier - The recognized name of the manuscript, e.g. a library
57 identifier. Taken from the msDesc element for a TEI file.
59 =item * other_info - A freeform string for any other description of the
66 The sigil by which to identify this manuscript, which must conform to the
67 specification for XML attribute strings (broadly speaking, it must begin
68 with a letter and can have only a few sorts of punctuation characters in
73 A freeform name by which to identify the manuscript, which may be longer
74 than the sigil. Defaults to 'Unidentified ms', but will be taken from the
75 TEI msName attribute, or constructed from the settlement and idno if
80 The city, town, etc. where the manuscript is held. Will be read from the
81 TEI msDesc element if supplied.
85 The institution that holds the manuscript. Will be read from the TEI msDesc
90 The identification or call number of the manuscript. Will be read from the
91 TEI msDesc element if supplied.
95 An array of strings (words) that contains the text of the
96 manuscript. This should not change after the witness has been
97 instantiated, and the path through the collation should always match it.
101 An array of strings (words) that contains the layered
102 text, if any, of the manuscript. This should not change after the witness
103 has been instantiated, and the path through the collation should always
108 Accessor method for the witness identifier.
112 Accessor method for the general witness description.
116 Boolean method that returns a true value if the witness was created with a
117 data source (that is, a file, string, or object to be parsed).
121 Boolean method to note whether the witness has layers (e.g. pre-correction
122 readings) in the collation.
127 my $trad = Text::Tradition->new( 'name' => 'test tradition' );
128 my $c = $trad->collation;
130 # Test a plaintext witness via string
131 my $str = 'This is a line of text';
132 my $ptwit = $trad->add_witness(
134 'sourcetype' => 'plaintext',
137 is( ref( $ptwit ), 'Text::Tradition::Witness', 'Created a witness' );
139 is( $ptwit->sigil, 'A', "Witness has correct sigil" );
140 is( $c->path_text( $ptwit->sigil ), $str, "Witness has correct text" );
143 # Test some JSON witnesses via object
144 open( JSIN, 't/data/witnesses/testwit.json' ) or die "Could not open JSON test input";
145 binmode( JSIN, ':encoding(UTF-8)' );
148 $trad->add_json_witnesses( join( '', @lines ) );
149 is( ref( $trad->witness( 'MsAJ' ) ), 'Text::Tradition::Witness',
150 "Found first JSON witness" );
151 is( ref( $trad->witness( 'MsBJ' ) ), 'Text::Tradition::Witness',
152 "Found second JSON witness" );
154 # Test an XML witness via file
155 my $xmlwit = $trad->add_witness( 'sourcetype' => 'xmldesc',
156 'file' => 't/data/witnesses/teiwit.xml' );
157 is( ref( $xmlwit ), 'Text::Tradition::Witness', "Created witness from XML file" );
159 is( $xmlwit->sigil, 'V887', "XML witness has correct sigil" );
160 ok( $xmlwit->is_layered, "Picked up correction layer" );
161 is( @{$xmlwit->text}, 182, "Got correct text length" );
162 is( @{$xmlwit->layertext}, 182, "Got correct a.c. text length" );
164 my @allwitwords = grep { $_->id =~ /^V887/ } $c->readings;
165 is( @allwitwords, 184, "Reused appropriate readings" );
168 my $xpwit = $trad->add_witness( 'sourcetype' => 'xmldesc',
169 'file' => 't/data/witnesses/group.xml',
170 'use_text' => '//tei:group/tei:text[2]' );
171 is( ref( $xpwit ), 'Text::Tradition::Witness', "Created witness from XML group" );
173 is( $xpwit->sigil, 'G', "XML part witness has correct sigil" );
174 ok( !$xpwit->is_layered, "Picked up no correction layer" );
175 is( @{$xpwit->text}, 157, "Got correct text length" );
183 subtype 'SourceType',
185 where { $_ =~ /^(xmldesc|plaintext|json|collation)$/ },
186 message { 'Source type must be one of xmldesc, plaintext, json, collation' };
190 where { $_ =~ /\A$xml10_name_rx\z/ },
191 message { 'Sigil must be a valid XML attribute string' };
193 no Moose::Util::TypeConstraints;
197 'isa' => 'Text::Tradition',
202 # Sigil. Required identifier for a witness, but may be found inside
207 predicate => 'has_sigil',
208 writer => '_set_sigil',
211 # Other identifying information
212 has 'identifier' => (
217 has 'settlement' => (
222 has 'repository' => (
232 # Source. Can be XML obj, JSON data struct, or string.
233 # Not used if the witness is created by parsing a collation.
234 has 'sourcetype' => (
243 predicate => 'has_file',
249 predicate => 'has_string',
252 has 'object' => ( # could be anything.
254 predicate => 'has_object',
255 clearer => 'clear_object',
258 # In the case of a TEI document with multiple texts, specify
259 # which text is the root. Should be an XPath expression.
265 # Text. This is an array of strings (i.e. word tokens).
266 # TODO Think about how to handle this for the case of pre-prepared
267 # collations, where the tokens are in the graph already.
270 isa => 'ArrayRef[Str]',
271 predicate => 'has_text',
276 isa => 'ArrayRef[Str]',
277 predicate => 'has_layertext',
280 # Path. This is an array of Reading nodes that can be saved during
281 # initialization, but should be cleared before saving in a DB.
284 isa => 'ArrayRef[Text::Tradition::Collation::Reading]',
285 predicate => 'has_path',
286 clearer => 'clear_path',
289 ## TODO change the name of this
290 has 'uncorrected_path' => (
292 isa => 'ArrayRef[Text::Tradition::Collation::Reading]',
293 clearer => 'clear_uncorrected_path',
296 has 'is_layered' => (
301 # If we set an uncorrected path, ever, remember that we did so.
302 around 'uncorrected_path' => sub {
306 $self->is_layered( 1 );
312 if( $self->has_source ) {
313 my $init_sub = '_init_from_' . $self->sourcetype;
315 # Remove our XML / source objects; we no longer need them.
316 $self->clear_object if $self->has_object;
317 $self->tradition->collation->make_witness_path( $self );
324 return $self->has_file || $self->has_string || $self->has_object;
327 sub _init_from_xmldesc {
330 if( $self->has_object ) {
331 unless( ref( $self->object ) eq 'XML::LibXML::Element' ) {
332 throw( ident => "bad source",
333 message => "Source object must be an XML::LibXML::Element (this is "
334 . ref( $self->object ) . ");" );
336 $xmlobj = $self->object;
339 my $parser = XML::LibXML->new();
340 my $parsersub = $self->has_file ? 'parse_file' : 'parse_string';
342 $xmlobj = $parser->$parsersub( $self->file )->documentElement;
343 } catch( XML::LibXML::Error $e ) {
344 throw( ident => "bad source",
345 message => "XML parsing error: " . $e->as_string );
349 unless( $xmlobj->nodeName eq 'TEI' ) {
350 throw( ident => "bad source",
351 message => "Source XML must be TEI (this is " . $xmlobj->nodeName . ")" );
354 # Set up the tags we need, with or without namespaces.
355 map { $tags{$_} = "//$_" }
356 qw/ msDesc msName settlement repository idno p lg w seg add del /;
357 # Set up our XPath object
358 my $xpc = _xpc_for_el( $xmlobj );
359 # Use namespace-aware tags if we have to
360 if( $xmlobj->namespaceURI ) {
361 map { $tags{$_} = "//tei:$_" } keys %tags;
365 if( my $desc = $xpc->find( $tags{msDesc} ) ) {
366 my $descnode = $desc->get_node(1);
367 # First try to use settlement/repository/idno.
368 my( $setNode, $reposNode, $idNode ) =
369 ( $xpc->find( $tags{settlement}, $descnode )->get_node(1),
370 $xpc->find( $tags{repository}, $descnode )->get_node(1),
371 $xpc->find( $tags{idno}, $descnode )->get_node(1) );
372 $self->settlement( $setNode ? $setNode->textContent : '' );
373 $self->repository( $reposNode ? $reposNode->textContent : '' );
374 $self->idno( $idNode ? $idNode->textContent : '' );
375 if( $self->settlement && $self->idno ) {
376 $self->identifier( join( ' ', $self->{'settlement'}, $self->{'idno'} ) );
378 # Look for an msName.
379 my $msNameNode = $xpc->find( $tags{msName}, $descnode )->get_node(1);
381 $self->identifier( $msNameNode->textContent );
383 # We have an msDesc but who knows what is in it?
384 my $desc = $descnode->textContent;
387 $self->identifier( $desc );
390 if( $descnode->hasAttribute('xml:id') ) {
391 $self->_set_sigil( $descnode->getAttribute('xml:id') );
392 } elsif( !$self->has_sigil ) {
393 throw( ident => 'missing sigil',
394 message => 'Could not find xml:id witness sigil' );
397 throw( ident => "bad source",
398 message => "Could not find manuscript description element in TEI header" );
401 # Now get the words out.
403 my @layerwords; # if the witness has layers
404 # First, make sure all the words are wrapped in tags.
405 # TODO Make this not necessarily dependent upon whitespace...
406 word_tag_wrap( $xmlobj );
407 # Now go text hunting.
409 if( $self->use_text ) {
410 @textnodes = $xpc->findnodes( $self->use_text );
412 # Use the first 'text' node in the document.
413 @textnodes = $xmlobj->getElementsByTagName( 'text' );
415 my $teitext = $textnodes[0];
417 _tokenize_text( $self, $teitext, \@words, \@layerwords );
419 throw( ident => "bad source",
420 message => "No text element in document '" . $self->{'identifier'} . "!" );
423 my @text = map { $_->text } @words;
424 my @layertext = map { $_->text } @layerwords;
425 $self->path( \@words );
426 $self->text( \@text );
427 if( join( ' ', @text ) ne join( ' ', @layertext ) ) {
428 $self->uncorrected_path( \@layerwords );
429 $self->layertext( \@layertext );
434 my( $self, $teitext, $wordlist, $uncorrlist ) = @_;
435 # Strip out the words.
436 my $xpc = _xpc_for_el( $teitext );
437 my @divs = $xpc->findnodes( '//*[starts-with(name(.), "div")]' );
440 if( my $n = $_->getAttribute( 'n' ) ) {
441 $place_str = '#DIV_' . $n . '#';
443 $place_str = '#DIV#';
445 $self->_objectify_words( $teitext, $wordlist, $uncorrlist, $place_str );
448 # But maybe we don't have any divs. Just paragraphs.
450 $self->_objectify_words( $teitext, $wordlist, $uncorrlist );
454 sub _objectify_words {
455 my( $self, $element, $wordlist, $uncorrlist, $divmarker ) = @_;
457 my $xpc = _xpc_for_el( $element );
458 my $xpexpr = '.' . $tags{p} . '|.' . $tags{lg};
459 my @pgraphs = $xpc->findnodes( $xpexpr );
460 return () unless @pgraphs;
461 # Set up an expression to look for words and segs
462 $xpexpr = '.' . $tags{w} . '|.' . $tags{seg};
463 foreach my $pg ( @pgraphs ) {
464 # If this paragraph is the descendant of a note element,
466 my @noop_container = $xpc->findnodes( 'ancestor::note', $pg );
467 next if scalar @noop_container;
468 # Get the text of each node
470 # Hunt down each wrapped word/seg, and make an object (or two objects)
471 # of it, if necessary.
472 foreach my $c ( $xpc->findnodes( $xpexpr, $pg ) ) {
473 my( $text, $uncorr ) = _get_word_strings( $c );
475 # ( $text, $uncorr ) = _get_word_object( $c );
476 # } catch( Text::Tradition::Error $e
477 # where { $_->has_tag( 'lb' ) } ) {
480 unless( defined $text || defined $uncorr ) {
481 print STDERR "WARNING: no text in node " . $c->nodeName
482 . "\n" unless $c->nodeName eq 'lb';
485 print STDERR "DEBUG: space found in element node "
486 . $c->nodeName . "\n" if $text =~ /\s/ || $uncorr =~ /\s/;
488 my $ctr = @$wordlist > @$uncorrlist ? @$wordlist : @$uncorrlist;
489 while( $self->tradition->collation->reading( $self->sigil.'r'.$ctr ) ) {
492 my $id = $self->sigil . 'r' . $ctr;
493 my( $word, $acword );
495 $word = $self->tradition->collation->add_reading(
496 { 'id' => $id, 'text' => $text });
498 if( $uncorr && $uncorr ne $text ) {
500 $acword = $self->tradition->collation->add_reading(
501 { 'id' => $id, 'text' => $uncorr });
506 # if( $first_word ) {
508 # # Set the relevant sectioning markers
510 # $w->add_placeholder( $divmarker );
511 # $divmarker = undef;
513 # $w->add_placeholder( '#PG#' );
515 push( @$wordlist, $word ) if $word;
516 push( @$uncorrlist, $acword ) if $acword;
521 # Given a word or segment node, make a Reading object for the word
522 # therein. Make two Reading objects if there is an 'uncorrected' vs.
525 sub _get_word_strings {
527 my( $text, $uncorrtext );
528 # We can have an lb or pb in the middle of a word; if we do, the
529 # whitespace (including \n) after the break becomes insignificant
530 # and we want to nuke it.
531 my $strip_leading_space = 0;
532 my $word_excluded = 0;
533 my $xpc = _xpc_for_el( $node );
534 # TODO This does not cope with nested add/dels.
535 my @addition = $xpc->findnodes( 'ancestor::' . substr( $tags{add}, 2 ) );
536 my @deletion = $xpc->findnodes( 'ancestor::' . substr( $tags{del}, 2 ) );
537 foreach my $c ($node->childNodes() ) {
538 if( $c->nodeName eq 'num'
539 && defined $c->getAttribute( 'value' ) ) {
541 $text .= $c->getAttribute( 'value' ) unless @deletion;
542 $uncorrtext .= $c->getAttribute( 'value' ) unless @addition;
543 # If this is just after a line/page break, return to normal behavior.
544 $strip_leading_space = 0;
545 } elsif ( $c->nodeName =~ /^[lp]b$/ ) {
546 # Set a flag that strips leading whitespace until we
547 # get to the next bit of non-whitespace.
548 $strip_leading_space = 1;
549 } elsif ( $c->nodeName eq 'fw' # for catchwords
550 || $c->nodeName eq 'sic'
551 || $c->nodeName eq 'note' #TODO: decide how to deal with notes
552 || $c->textContent eq ''
553 || ref( $c ) eq 'XML::LibXML::Comment' ) {
554 $word_excluded = 1 if $c->nodeName =~ /^(fw|sic)$/;
556 } elsif( $c->nodeName eq 'add' ) {
557 my( $use, $discard ) = _get_word_strings( $c );
559 } elsif( $c->nodeName eq 'del' ) {
560 my( $discard, $use ) = _get_word_strings( $c );
563 my ( $tagtxt, $taguncorr );
564 if( ref( $c ) eq 'XML::LibXML::Text' ) {
566 $tagtxt = $c->textContent;
567 $taguncorr = $c->textContent;
569 ( $tagtxt, $taguncorr ) = _get_word_strings( $c );
571 if( $strip_leading_space ) {
572 $tagtxt =~ s/^[\s\n]+//s;
573 $taguncorr =~ s/^[\s\n]+//s;
574 # Unset the flag as soon as we see non-whitespace.
575 $strip_leading_space = 0 if $tagtxt;
578 $uncorrtext .= $taguncorr;
581 throw( ident => "text not found",
582 tags => [ $node->nodeName ],
583 message => "No text found in node " . $node->toString(0) )
584 unless $text || $uncorrtext || $word_excluded || $node->toString(0) =~/gap/;
585 return( $text, $uncorrtext );
589 my( $self, $string, $c ) = @_;
590 my @raw_words = split( /\s+/, $string );
592 foreach my $w ( @raw_words ) {
593 my $id = $self->sigil . 'r'. $c++;
594 my %opts = ( 'text' => $w, 'id' => $id );
595 my $w_obj = $self->tradition->collation->add_reading( \%opts );
596 # Skip any words that have been canonized out of existence.
597 next if( length( $w_obj->text ) == 0 );
598 push( @words, $w_obj );
603 sub _init_from_json {
606 if( $self->has_object ) {
607 $wit = $self->object;
608 } elsif( $self->has_string ) {
609 $wit = from_json( $self->string );
610 } elsif( $self->has_file ) {
611 my $ok = open( INPUT, $self->file );
613 throw( ident => "bad source",
614 message => 'Could not open ' . $self->file . ' for reading' );
616 binmode( INPUT, ':encoding(UTF-8)' );
619 $wit = from_json( join( '', @lines ) );
622 if( exists $wit->{'id'} ) {
623 $self->_set_sigil( $wit->{'id'} );
624 } elsif( !$self->has_sigil ) {
625 throw( ident => 'missing sigil',
626 message => 'Could not find witness sigil (id) in JSON spec' );
628 $self->identifier( $wit->{'name'} );
631 my( @text, @layertext );
632 if( exists $wit->{'content'} ) {
633 # We need to tokenize the text ourselves.
634 @words = _split_words( $self, $wit->{'content'} );
635 } elsif( exists $wit->{'tokens'} ) {
636 # We have a bunch of pretokenized words.
638 foreach my $token ( @{$wit->{'tokens'}} ) {
639 my $w_obj = $self->tradition->collation->add_reading({
640 'text' => $token->{'t'}, 'id' => $self->sigil . 'r' . $ctr++ });
641 push( @words, $w_obj );
642 push( @text, $token->{'t'} ); # TODO unless...?
644 ## TODO rethink this JSOn mechanism
645 if( exists $wit->{'layertokens'} ) {
646 foreach my $token ( @{$wit->{'layertokens'}} ) {
647 my $w_obj = $self->tradition->collation->add_reading({
648 'text' => $token->{'t'}, 'id' => $self->sigil . 'r' . $ctr++ });
649 push( @layerwords, $w_obj );
650 push( @layertext, $token->{'t'} );
654 $self->text( \@text );
655 $self->layertext( \@layertext ) if @layertext;
656 $self->path( \@words );
657 $self->uncorrected_path( \@layerwords ) if @layerwords;
660 sub _init_from_plaintext {
663 if( $self->has_file ) {
664 my $ok = open( INPUT, $self->file );
666 throw( ident => "bad source",
667 message => 'Could not open ' . $self->file . ' for reading' );
669 binmode( INPUT, ':encoding(UTF-8)' );
672 $str = join( '', @lines );
673 } elsif( $self->has_object ) { # ...seriously?
674 $str = ${$self->object};
676 $str = $self->string;
679 # TODO allow a different word separation expression
680 my @text = split( /\s+/, $str );
681 $self->text( \@text );
682 my @words = _split_words( $self, $str );
683 $self->path( \@words );
687 Text::Tradition::Error->throw(
688 'ident' => 'Witness parsing error',
695 my $xpc = XML::LibXML::XPathContext->new( $el );
696 if( $el->namespaceURI ) {
697 $xpc->registerNs( 'tei', $el->namespaceURI );
702 =head2 export_as_json
704 Exports the witness as a JSON structure, with the following keys:
708 =item * id - The witness sigil
710 =item * name - The witness identifier
712 =item * tokens - An array of hashes of the form { "t":"WORD" }
719 my $trad = Text::Tradition->new();
721 my @text = qw/ Thhis is a line of text /;
722 my $wit = $trad->add_witness(
724 'string' => join( ' ', @text ),
725 'sourcetype' => 'plaintext',
726 'identifier' => 'test witness',
728 my $jsonstruct = $wit->export_as_json;
729 is( $jsonstruct->{'id'}, 'A', "got the right witness sigil" );
730 is( $jsonstruct->{'name'}, 'test witness', "got the right identifier" );
731 is( scalar @{$jsonstruct->{'tokens'}}, 6, "got six text tokens" );
732 foreach my $idx ( 0 .. $#text ) {
733 is( $jsonstruct->{'tokens'}->[$idx]->{'t'}, $text[$idx], "tokens look OK" );
736 my @ctext = qw( when april with his showers sweet with fruit the drought of march
737 has pierced unto the root );
738 $trad = Text::Tradition->new(
739 'input' => 'CollateX',
740 'file' => 't/data/Collatex-16.xml' );
742 $jsonstruct = $trad->witness('A')->export_as_json;
743 is( $jsonstruct->{'id'}, 'A', "got the right witness sigil" );
744 is( $jsonstruct->{'name'}, undef, "got undef for missing identifier" );
745 is( scalar @{$jsonstruct->{'tokens'}}, 17, "got all text tokens" );
746 foreach my $idx ( 0 .. $#ctext ) {
747 is( $jsonstruct->{'tokens'}->[$idx]->{'t'}, $ctext[$idx], "tokens look OK" );
750 ## TODO test layertext export
758 my @wordlist = map { { 't' => $_ || '' } } @{$self->text};
760 'id' => $self->sigil,
761 'tokens' => \@wordlist,
762 'name' => $self->identifier,
764 if( $self->is_layered ) {
765 my @lwlist = map { { 't' => $_ || '' } } @{$self->uncorrected};
766 $obj->{'layertokens'} = \@lwlist;
772 __PACKAGE__->meta->make_immutable;
778 =item * Figure out how to serialize a witness
780 =item * Support encodings other than UTF-8
786 This package is free software and is provided "as is" without express
787 or implied warranty. You can redistribute it and/or modify it under
788 the same terms as Perl itself.
792 Tara L Andrews E<lt>aurum@cpan.orgE<gt>