use strict;
use warnings;
+use Text::Tradition::Parser::Util qw( collate_variants );
use XML::LibXML;
use XML::LibXML::XPathContext;
=cut
+my $text = {}; # Hash of arrays, one per eventual witness we find.
+my @common_readings;
+my $substitutions = {}; # Keep track of merged readings
+my $app_anchors = {}; # Track apparatus references
+my $app_ac = {}; # Save a.c. readings
+
+# Create the package variables for tag names.
+
+# Would really like to do this with varname variables, but apparently this
+# is considered a bad idea. The long way round then.
+my( $LISTWIT, $WITNESS, $TEXT, $W, $SEG, $APP, $RDG, $LEM )
+ = ( 'listWit', 'witness', 'text', 'w', 'seg', 'app', 'rdg', 'lem' );
+sub make_tagnames {
+ my( $ns ) = @_;
+ if( $ns ) {
+ $LISTWIT = "$ns:$LISTWIT";
+ $WITNESS = "$ns:$WITNESS";
+ $TEXT = "$ns:$TEXT";
+ $W = "$ns:$W";
+ $SEG = "$ns:$SEG";
+ $APP = "$ns:$APP";
+ $RDG = "$ns:$RDG";
+ $LEM = "$ns:$LEM";
+ }
+}
+
+# Parse the TEI file.
sub parse {
my( $tradition, $xml_str ) = @_;
my $doc = $parser->parse_string( $xml_str );
my $tei = $doc->documentElement();
my $xpc = XML::LibXML::XPathContext->new( $tei );
- $xpc->registerNs( 'tei', 'http://www.tei-c.org/ns/1.0' );
-
+ my $ns;
+ if( $tei->namespaceURI ) {
+ $ns = 'tei';
+ $xpc->registerNs( $ns, $tei->namespaceURI );
+ }
+ make_tagnames( $ns );
+
# Then get the witnesses and create the witness objects.
- foreach my $wit_el ( $xpc->findnodes( '//tei:listWit/tei:witness' ) ) {
- my $sig = $wit_el->getAttribute( 'xml:id' );
- my $source = $wit_el->toString();
- $tradition->add_witness( sigil => $sig, source => $source );
+ foreach my $wit_el ( $xpc->findnodes( "//$LISTWIT/$WITNESS" ) ) {
+ my $sig = $wit_el->getAttribute( 'xml:id' );
+ my $source = $wit_el->toString();
+ $tradition->add_witness( sigil => $sig, source => $source );
}
- # Now go through the text and make the tokens.
- # Assume for now that each word is tokenized in the XML.
- my $text = {};
- map { $text->{$_->sigil} = [] } @{$tradition->witnesses};
- my $word_ctr = 0;
- my %used_word_ids;
- foreach my $word_el ( $xpc->findnodes( '//tei:w|tei:seg' ) ) {
- # If it is contained within a lem or a rdg, look at those witnesses.
- # Otherwise it is common to all witnesses.
- # Also common if it is the only lem/rdg within its app.
- # Thus we are assuming non-nested apps.
-
- my $parent_rdg = $xpc->find( 'parent::tei:lem|parent::tei:rdg', $word_el );
- my @wits = get_sigla( $parent_rdg );
- @wits = map { $_->sigil } @{$tradition->witnesses} unless @wits;
-
- # Create the node
- my $reading = make_reading( $tradition->collation, $word_el );
-
- # Figure out if it is a common node, that is, if it is outside an apparatus
- # or the only rdg in an apparatus
- my $common = 1;
- if( $xpc->findnodes( 'ancestor::tei:app', $word_el ) ) {
- # If we are in an app we are not a common node...
- $common = 0;
- if( $xpc->findnodes( 'ancestor::tei:app/tei:rdg' )->size == 1 ) {
- # unless we are the only reading in the app.
- $common = 1;
- }
- }
- $reading->make_common if $common;
-
- foreach my $sig ( @wits ) {
- push( @{$text->{$sig}}, $reading );
- }
+ map { $text->{$_->sigil} = [] } $tradition->witnesses;
+ # Look for all word/seg node IDs and note their pre-existence.
+ my @attrs = $xpc->findnodes( "//$W|$SEG/attribute::xml:id" );
+ save_preexisting_nodeids( @attrs );
+
+ # Now go through the children of the text element and pull out the
+ # actual text.
+ foreach my $xml_el ( $xpc->findnodes( "//$TEXT" ) ) {
+ foreach my $xn ( $xml_el->childNodes ) {
+ _get_readings( $tradition, $xn );
+ }
+ }
+ # Our $text global now has lists of readings, one per witness.
+ # Join them up.
+ my $c = $tradition->collation;
+ foreach my $sig ( keys %$text ) {
+ next if $sig eq 'base'; # Skip base text readings with no witnesses.
+ # Determine the list of readings for
+ my $sequence = $text->{$sig};
+ my @real_sequence = ( $c->start );
+ push( @$sequence, $c->end );
+ my $source = $c->start;
+ foreach( _clean_sequence( $sig, $sequence ) ) {
+ my $rdg = _return_rdg( $_ );
+ push( @real_sequence, $rdg );
+ $c->add_path( $source, $rdg, $sig );
+ $source = $rdg;
+ }
+ $tradition->witness( $sig )->path( \@real_sequence );
+ # See if we need to make an a.c. version of the witness.
+ if( exists $app_ac->{$sig} ) {
+ my @uncorrected;
+ push( @uncorrected, @real_sequence );
+ foreach my $app ( keys %{$app_ac->{$sig}} ) {
+ my $start = _return_rdg( $app_anchors->{$app}->{$sig}->{'start'} );
+ my $end = _return_rdg( $app_anchors->{$app}->{$sig}->{'end'} );
+ my @new = map { _return_rdg( $_ ) } @{$app_ac->{$sig}->{$app}};
+ _replace_sequence( \@uncorrected, $start, $end, @new );
+ }
+ my $source = $c->start;
+ foreach my $rdg ( @uncorrected ) {
+ my $has_base = grep { $_->label eq $sig } $source->edges_to( $rdg );
+ if( $rdg ne $c->start && !$has_base ) {
+ print STDERR sprintf( "Adding path %s from %s -> %s\n",
+ $sig.$c->ac_label, $source->name, $rdg->name );
+ $c->add_path( $source, $rdg, $sig.$c->ac_label );
+ }
+ $source = $rdg;
+ }
+ $tradition->witness( $sig )->uncorrected_path( \@uncorrected );
+ }
+ }
+ # Delete readings that are no longer part of the graph.
+ # TODO think this is useless actually
+ foreach ( keys %$substitutions ) {
+ $tradition->collation->del_reading( $tradition->collation->reading( $_ ) );
+ }
+ $tradition->collation->calculate_positions( @common_readings );
+}
+
+sub _clean_sequence {
+ my( $wit, $sequence ) = @_;
+ my @clean_sequence;
+ foreach my $rdg ( @$sequence ) {
+ if( $rdg =~ /^PH-(.*)$/ ) {
+ # It is a placeholder. Keep it only if we need it.
+ my $app_id = $1;
+ if( exists $app_ac->{$wit}->{$app_id} ) {
+ print STDERR "Retaining empty placeholder for $app_id\n";
+ push( @clean_sequence, $rdg );
+ }
+ } else {
+ push( @clean_sequence, $rdg );
+ }
}
+ return @clean_sequence;
+}
- $DB::single = 1;
- # Now we have the text paths through the witnesses, so we can make
- # the edges.
- my $end = $tradition->collation->add_reading( '#END#' );
- foreach my $sigil ( keys %$text ) {
- my @nodes = @{$text->{$sigil}};
- my $source = $tradition->collation->start;
- foreach my $n ( @nodes ) {
- # print STDERR sprintf( "Joining %s -> %s for wit %s\n", $source->text, $n->text, $sigil );
- $tradition->collation->add_path( $source, $n, $sigil );
- $source = $n;
- }
- $tradition->collation->add_path( $source, $end, $sigil );
+sub _replace_sequence {
+ my( $arr, $start, $end, @new ) = @_;
+ my( $start_idx, $end_idx );
+ foreach my $i ( 0 .. $#{$arr} ) {
+ $start_idx = $i if( $arr->[$i]->name eq $start );
+ if( $arr->[$i]->name eq $end ) {
+ $end_idx = $i;
+ last;
+ }
+ }
+ unless( $start_idx && $end_idx ) {
+ warn "Could not find start and end";
+ return;
}
+ my $length = $end_idx - $start_idx + 1;
+ splice( @$arr, $start_idx, $length, @new );
+}
- # TODO think about relationships, transpositions, etc.
+sub _return_rdg {
+ my( $rdg ) = @_;
+ # If we were passed a reading name, return the name. If we were
+ # passed a reading object, return the object.
+ my $wantobj = ref( $rdg ) eq 'Text::Tradition::Collation::Reading';
+ my $real = $rdg;
+ if( exists $substitutions->{ $wantobj ? $rdg->name : $rdg } ) {
+ $real = $substitutions->{ $wantobj ? $rdg->name : $rdg };
+ $real = $real->name unless $wantobj;
+ }
+ return $real;
}
+## Recursive helper function to help us navigate through nested XML,
+## picking out the text. $tradition is the tradition, needed for
+## making readings; $xn is the XML node currently being looked at,
+## $in_var is a flag to say that we are inside a variant, $ac is a
+## flag to say that we are inside an ante-correctionem reading, and
+## @cur_wits is the list of witnesses to which this XML node applies.
+## Returns the list of readings, if any, created on the run.
+
+{
+ my @active_wits;
+ my $current_app;
+
+ sub _get_readings {
+ my( $tradition, $xn, $in_var, $ac, @cur_wits ) = @_;
+ @cur_wits = @active_wits unless $in_var;
+
+ my @new_readings;
+ if( $xn->nodeType == XML_TEXT_NODE ) {
+ # Some words, thus make some readings.
+ my $str = $xn->data;
+ return unless $str =~ /\S/; # skip whitespace-only text nodes
+ #print STDERR "Handling text node " . $str . "\n";
+ # Check that all the witnesses we have are active.
+ foreach my $c ( @cur_wits ) {
+ warn "Could not find $c in active wits"
+ unless grep { $c eq $_ } @active_wits;
+ }
+ $str =~ s/^\s+//;
+ my $final = $str =~ s/\s+$//;
+ foreach my $w ( split( /\s+/, $str ) ) {
+ # For now, skip punctuation.
+ next if $w !~ /[[:alnum:]]/;
+ my $rdg = make_reading( $tradition->collation, $w );
+ push( @new_readings, $rdg );
+ unless( $in_var ) {
+ push( @common_readings, $rdg );
+ $rdg->make_common;
+ }
+ foreach ( @cur_wits ) {
+ warn "Empty wit!" unless $_;
+ warn "Empty reading!" unless $rdg;
+ push( @{$text->{$_}}, $rdg ) unless $ac;
+ }
+ }
+ } elsif( $xn->nodeName eq 'w' ) {
+ # Everything in this tag is one word. Also save any original XML ID.
+ #print STDERR "Handling word " . $xn->toString . "\n";
+ # Check that all the witnesses we have are active.
+ foreach my $c ( @cur_wits ) {
+ warn "Could not find $c in active wits"
+ unless grep { $c eq $_ } @active_wits;
+ }
+ my $xml_id = $xn->getAttribute( 'xml:id' );
+ my $rdg = make_reading( $tradition->collation, $xn->textContent, $xml_id );
+ push( @new_readings, $rdg );
+ unless( $in_var ) {
+ push( @common_readings, $rdg );
+ $rdg->make_common;
+ }
+ foreach( @cur_wits ) {
+ warn "Empty wit!" unless $_;
+ warn "Empty reading!" unless $rdg;
+ push( @{$text->{$_}}, $rdg ) unless $ac;
+ }
+ } elsif ( $xn->nodeName eq 'app' ) {
+ $current_app = $xn->getAttribute( 'xml:id' );
+ # print STDERR "Handling app $current_app\n";
+ # Keep the reading sets in this app.
+ my @sets;
+ # Recurse through all children (i.e. rdgs) for sets of words.
+ foreach ( $xn->childNodes ) {
+ my @rdg_set = _get_readings( $tradition, $_, $in_var, $ac, @cur_wits );
+ push( @sets, \@rdg_set ) if @rdg_set;
+ }
+ # Now collate these sets if we have more than one.
+ my $subs = collate_variants( $tradition->collation, @sets ) if @sets > 1;
+ map { $substitutions->{$_} = $subs->{$_} } keys %$subs;
+ # TODO Look through substitutions to see if we can make anything common now.
+ # Return the entire set of unique readings.
+ my %unique;
+ foreach my $s ( @sets ) {
+ map { $unique{$_->name} = $_ } @$s;
+ }
+ push( @new_readings, values( %unique ) );
+ # Exit the current app.
+ $current_app = '';
+ } elsif ( $xn->nodeName eq 'lem' || $xn->nodeName eq 'rdg' ) {
+ # Alter the current witnesses and recurse.
+ #print STDERR "Handling reading for " . $xn->getAttribute( 'wit' ) . "\n";
+ $ac = $xn->getAttribute( 'type' ) && $xn->getAttribute( 'type' ) eq 'a.c.';
+ my @rdg_wits = get_sigla( $xn );
+ @rdg_wits = ( 'base' ) unless @rdg_wits; # Allow for editorially-supplied readings
+ my @words;
+ foreach ( $xn->childNodes ) {
+ my @rdg_set = _get_readings( $tradition, $_, 1, $ac, @rdg_wits );
+ push( @words, @rdg_set ) if @rdg_set;
+ }
+ # If we have more than one word in a reading, it should become a segment.
+ # $tradition->collation->add_segment( @words ) if @words > 1;
+
+ if( $ac ) {
+ # Add the reading set to the a.c. readings.
+ foreach ( @rdg_wits ) {
+ $app_ac->{$_}->{$current_app} = \@words;
+ }
+ } else {
+ # Add the reading set to the app anchors for each witness
+ # or put in placeholders for empty p.c. readings
+ foreach ( @rdg_wits ) {
+ my $start = @words ? $words[0]->name : "PH-$current_app";
+ my $end = @words ? $words[-1]->name : "PH-$current_app";
+ $app_anchors->{$current_app}->{$_}->{'start'} = $start;
+ $app_anchors->{$current_app}->{$_}->{'end'} = $end;
+ push( @{$text->{$_}}, $start ) unless @words;
+ }
+ }
+ push( @new_readings, @words );
+ } elsif( $xn->nodeName eq 'witStart' ) {
+ # Add the relevant wit(s) to the active list.
+ #print STDERR "Handling witStart\n";
+ push( @active_wits, @cur_wits );
+ } elsif( $xn->nodeName eq 'witEnd' ) {
+ # Take the relevant wit(s) out of the list.
+ #print STDERR "Handling witEnd\n";
+ my $regexp = '^(' . join( '|', @cur_wits ) . ')$';
+ @active_wits = grep { $_ !~ /$regexp/ } @active_wits;
+ } elsif( $xn->nodeName eq 'witDetail' ) {
+ # Ignore these for now.
+ return;
+ } else {
+ # Recurse as if this tag weren't there.
+ #print STDERR "Recursing on tag " . $xn->nodeName . "\n";
+ foreach( $xn->childNodes ) {
+ push( @new_readings, _get_readings( $tradition, $_, $in_var, $ac, @cur_wits ) );
+ }
+ }
+ return @new_readings;
+ }
+
+}
+
+# Helper to extract a list of witness sigla from a reading element.
sub get_sigla {
my( $rdg ) = @_;
# Cope if we have been handed a NodeList. There is only
# one reading here.
if( ref( $rdg ) eq 'XML::LibXML::NodeList' ) {
- $rdg = $rdg->shift;
+ $rdg = $rdg->shift;
}
my @wits;
if( ref( $rdg ) eq 'XML::LibXML::Element' ) {
- @wits = split( /\s+/, $rdg->getAttribute( 'wit' ) );
- map { $_ =~ s/^\#// } @wits;
+ my $witstr = $rdg->getAttribute( 'wit' );
+ $witstr =~ s/^\s+//;
+ $witstr =~ s/\s+$//;
+ @wits = split( /\s+/, $witstr );
+ map { $_ =~ s/^\#// } @wits;
}
return @wits;
}
+# Helper with its counters to actually make the readings.
{
my $word_ctr = 0;
my %used_nodeids;
+ sub save_preexisting_nodeids {
+ foreach( @_ ) {
+ $used_nodeids{$_->getValue()} = 1;
+ }
+ }
+
sub make_reading {
- my( $graph, $word_el) = @_;
- my $xml_id = $word_el->getAttribute( 'xml:id' );
- if( $xml_id && exists $used_nodeids{$xml_id} ) {
- warn "Already used assigned ID $xml_id";
- $xml_id = undef;
- }
- if( !$xml_id ) {
- until( $xml_id ) {
- my $try_id = 'w'.$word_ctr++;
- next if exists $used_nodeids{$try_id};
- $xml_id = $try_id;
- }
- }
- my $rdg = $graph->add_reading( $xml_id );
- $rdg->text( $word_el->textContent() );
- $used_nodeids{$xml_id} = $rdg;
- return $rdg;
+ my( $graph, $word, $xml_id ) = @_;
+ if( $xml_id ) {
+ if( exists $used_nodeids{$xml_id} ) {
+ if( $used_nodeids{$xml_id} != 1 ) {
+ warn "Already used assigned XML ID somewhere else!";
+ $xml_id = undef;
+ }
+ } else {
+ warn "Undetected pre-existing XML ID";
+ }
+ }
+ if( !$xml_id ) {
+ until( $xml_id ) {
+ my $try_id = 'w'.$word_ctr++;
+ next if exists $used_nodeids{$try_id};
+ $xml_id = $try_id;
+ }
+ }
+ my $rdg = $graph->add_reading( $xml_id );
+ $rdg->text( $word );
+ $used_nodeids{$xml_id} = $rdg;
+ return $rdg;
}
}
projects / scpubgit/stemmatology.git / blobdiff