Commit | Line | Data |
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1 | package Text::Tradition::Collation; |
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2 | |
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3 | use Encode qw( decode_utf8 ); |
4 | use File::Temp; |
c9bf3dbf |
5 | use Graph; |
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6 | use IPC::Run qw( run binary ); |
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7 | use Text::CSV_XS; |
b15511bf |
8 | use Text::Tradition::Collation::Reading; |
22222af9 |
9 | use Text::Tradition::Collation::RelationshipStore; |
63778331 |
10 | use Text::Tradition::Error; |
df6d9812 |
11 | use XML::LibXML; |
a344ffcf |
12 | use XML::LibXML::XPathContext; |
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13 | use Moose; |
14 | |
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15 | has 'sequence' => ( |
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16 | is => 'ro', |
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17 | isa => 'Graph', |
18 | default => sub { Graph->new() }, |
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19 | handles => { |
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20 | paths => 'edges', |
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21 | }, |
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22 | ); |
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23 | |
24 | has 'relations' => ( |
25 | is => 'ro', |
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26 | isa => 'Text::Tradition::Collation::RelationshipStore', |
27 | handles => { |
28 | relationships => 'relationships', |
29 | related_readings => 'related_readings', |
30 | }, |
31 | writer => '_set_relations', |
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32 | ); |
dd3b58b0 |
33 | |
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34 | has 'tradition' => ( |
35 | is => 'ro', |
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36 | isa => 'Text::Tradition', |
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37 | weak_ref => 1, |
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38 | ); |
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39 | |
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40 | has 'readings' => ( |
41 | isa => 'HashRef[Text::Tradition::Collation::Reading]', |
42 | traits => ['Hash'], |
43 | handles => { |
44 | reading => 'get', |
45 | _add_reading => 'set', |
46 | del_reading => 'delete', |
47 | has_reading => 'exists', |
48 | readings => 'values', |
49 | }, |
50 | default => sub { {} }, |
51 | ); |
910a0a6d |
52 | |
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53 | has 'wit_list_separator' => ( |
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54 | is => 'rw', |
55 | isa => 'Str', |
56 | default => ', ', |
57 | ); |
58 | |
59 | has 'baselabel' => ( |
60 | is => 'rw', |
61 | isa => 'Str', |
62 | default => 'base text', |
63 | ); |
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64 | |
15d2d3df |
65 | has 'linear' => ( |
66 | is => 'rw', |
67 | isa => 'Bool', |
68 | default => 1, |
69 | ); |
c84275ff |
70 | |
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71 | has 'ac_label' => ( |
72 | is => 'rw', |
73 | isa => 'Str', |
74 | default => ' (a.c.)', |
75 | ); |
3a2ebbf4 |
76 | |
77 | has 'start' => ( |
78 | is => 'ro', |
79 | isa => 'Text::Tradition::Collation::Reading', |
80 | writer => '_set_start', |
81 | weak_ref => 1, |
82 | ); |
83 | |
84 | has 'end' => ( |
85 | is => 'ro', |
86 | isa => 'Text::Tradition::Collation::Reading', |
87 | writer => '_set_end', |
88 | weak_ref => 1, |
89 | ); |
1f563ac3 |
90 | |
4e5a7b2c |
91 | =head1 NAME |
92 | |
93 | Text::Tradition::Collation - a software model for a text collation |
94 | |
95 | =head1 SYNOPSIS |
96 | |
97 | use Text::Tradition; |
98 | my $t = Text::Tradition->new( |
99 | 'name' => 'this is a text', |
100 | 'input' => 'TEI', |
101 | 'file' => '/path/to/tei_parallel_seg_file.xml' ); |
102 | |
103 | my $c = $t->collation; |
104 | my @readings = $c->readings; |
105 | my @paths = $c->paths; |
106 | my @relationships = $c->relationships; |
107 | |
108 | my $svg_variant_graph = $t->collation->as_svg(); |
109 | |
110 | =head1 DESCRIPTION |
111 | |
112 | Text::Tradition is a library for representation and analysis of collated |
113 | texts, particularly medieval ones. The Collation is the central feature of |
114 | a Tradition, where the text, its sequence of readings, and its relationships |
115 | between readings are actually kept. |
116 | |
117 | =head1 CONSTRUCTOR |
118 | |
119 | =head2 new |
120 | |
121 | The constructor. Takes a hash or hashref of the following arguments: |
122 | |
123 | =over |
124 | |
125 | =item * tradition - The Text::Tradition object to which the collation |
126 | belongs. Required. |
127 | |
128 | =item * linear - Whether the collation should be linear; that is, whether |
129 | transposed readings should be treated as two linked readings rather than one, |
130 | and therefore whether the collation graph is acyclic. Defaults to true. |
131 | |
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132 | =item * baselabel - The default label for the path taken by a base text |
133 | (if any). Defaults to 'base text'. |
134 | |
135 | =item * wit_list_separator - The string to join a list of witnesses for |
136 | purposes of making labels in display graphs. Defaults to ', '. |
137 | |
138 | =item * ac_label - The extra label to tack onto a witness sigil when |
139 | representing another layer of path for the given witness - that is, when |
140 | a text has more than one possible reading due to scribal corrections or |
141 | the like. Defaults to ' (a.c.)'. |
142 | |
143 | =back |
144 | |
145 | =head1 ACCESSORS |
146 | |
147 | =head2 tradition |
148 | |
149 | =head2 linear |
150 | |
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151 | =head2 wit_list_separator |
152 | |
153 | =head2 baselabel |
154 | |
155 | =head2 ac_label |
156 | |
157 | Simple accessors for collation attributes. |
158 | |
159 | =head2 start |
160 | |
161 | The meta-reading at the start of every witness path. |
162 | |
163 | =head2 end |
164 | |
165 | The meta-reading at the end of every witness path. |
166 | |
167 | =head2 readings |
168 | |
169 | Returns all Reading objects in the graph. |
170 | |
171 | =head2 reading( $id ) |
172 | |
173 | Returns the Reading object corresponding to the given ID. |
174 | |
175 | =head2 add_reading( $reading_args ) |
176 | |
177 | Adds a new reading object to the collation. |
178 | See L<Text::Tradition::Collation::Reading> for the available arguments. |
179 | |
180 | =head2 del_reading( $object_or_id ) |
181 | |
182 | Removes the given reading from the collation, implicitly removing its |
183 | paths and relationships. |
184 | |
185 | =head2 merge_readings( $main, $second ) |
186 | |
187 | Merges the $second reading into the $main one. |
188 | The arguments may be either readings or reading IDs. |
189 | |
190 | =head2 has_reading( $id ) |
191 | |
192 | Predicate to see whether a given reading ID is in the graph. |
193 | |
194 | =head2 reading_witnesses( $object_or_id ) |
195 | |
196 | Returns a list of sigils whose witnesses contain the reading. |
197 | |
198 | =head2 paths |
199 | |
200 | Returns all reading paths within the document - that is, all edges in the |
201 | collation graph. Each path is an arrayref of [ $source, $target ] reading IDs. |
202 | |
203 | =head2 add_path( $source, $target, $sigil ) |
204 | |
205 | Links the given readings in the collation in sequence, under the given witness |
206 | sigil. The readings may be specified by object or ID. |
207 | |
208 | =head2 del_path( $source, $target, $sigil ) |
209 | |
210 | Links the given readings in the collation in sequence, under the given witness |
211 | sigil. The readings may be specified by object or ID. |
212 | |
213 | =head2 has_path( $source, $target ); |
214 | |
215 | Returns true if the two readings are linked in sequence in any witness. |
216 | The readings may be specified by object or ID. |
217 | |
218 | =head2 relationships |
219 | |
220 | Returns all Relationship objects in the collation. |
221 | |
222 | =head2 add_relationship( $reading, $other_reading, $options ) |
223 | |
224 | Adds a new relationship of the type given in $options between the two readings, |
225 | which may be specified by object or ID. Returns a value of ( $status, @vectors) |
226 | where $status is true on success, and @vectors is a list of relationship edges |
227 | that were ultimately added. |
228 | See L<Text::Tradition::Collation::Relationship> for the available options. |
229 | |
230 | =cut |
dd3b58b0 |
231 | |
d047cd52 |
232 | sub BUILD { |
3a2ebbf4 |
233 | my $self = shift; |
22222af9 |
234 | $self->_set_relations( Text::Tradition::Collation::RelationshipStore->new( 'collation' => $self ) ); |
3a2ebbf4 |
235 | $self->_set_start( $self->add_reading( { 'collation' => $self, 'is_start' => 1 } ) ); |
236 | $self->_set_end( $self->add_reading( { 'collation' => $self, 'is_end' => 1 } ) ); |
d047cd52 |
237 | } |
784877d9 |
238 | |
3a2ebbf4 |
239 | ### Reading construct/destruct functions |
240 | |
241 | sub add_reading { |
242 | my( $self, $reading ) = @_; |
243 | unless( ref( $reading ) eq 'Text::Tradition::Collation::Reading' ) { |
244 | my %args = %$reading; |
245 | $reading = Text::Tradition::Collation::Reading->new( |
246 | 'collation' => $self, |
247 | %args ); |
248 | } |
249 | # First check to see if a reading with this ID exists. |
250 | if( $self->reading( $reading->id ) ) { |
63778331 |
251 | throw( "Collation already has a reading with id " . $reading->id ); |
3a2ebbf4 |
252 | } |
253 | $self->_add_reading( $reading->id => $reading ); |
254 | # Once the reading has been added, put it in both graphs. |
255 | $self->sequence->add_vertex( $reading->id ); |
22222af9 |
256 | $self->relations->add_reading( $reading->id ); |
3a2ebbf4 |
257 | return $reading; |
eca16057 |
258 | }; |
259 | |
3a2ebbf4 |
260 | around del_reading => sub { |
261 | my $orig = shift; |
262 | my $self = shift; |
263 | my $arg = shift; |
264 | |
265 | if( ref( $arg ) eq 'Text::Tradition::Collation::Reading' ) { |
266 | $arg = $arg->id; |
267 | } |
3a2ebbf4 |
268 | # Remove the reading from the graphs. |
269 | $self->sequence->delete_vertex( $arg ); |
22222af9 |
270 | $self->relations->delete_reading( $arg ); |
3a2ebbf4 |
271 | |
272 | # Carry on. |
273 | $self->$orig( $arg ); |
274 | }; |
7854e12e |
275 | |
3a2ebbf4 |
276 | # merge_readings( $main, $to_be_deleted ); |
7854e12e |
277 | |
3a2ebbf4 |
278 | sub merge_readings { |
279 | my $self = shift; |
280 | |
281 | # We only need the IDs for adding paths to the graph, not the reading |
282 | # objects themselves. |
49d4f2ac |
283 | my( $kept, $deleted, $combine_char ) = $self->_stringify_args( @_ ); |
3a2ebbf4 |
284 | |
285 | # The kept reading should inherit the paths and the relationships |
286 | # of the deleted reading. |
287 | foreach my $path ( $self->sequence->edges_at( $deleted ) ) { |
288 | my @vector = ( $kept ); |
289 | push( @vector, $path->[1] ) if $path->[0] eq $deleted; |
290 | unshift( @vector, $path->[0] ) if $path->[1] eq $deleted; |
49d4f2ac |
291 | next if $vector[0] eq $vector[1]; # Don't add a self loop |
3a2ebbf4 |
292 | my %wits = %{$self->sequence->get_edge_attributes( @$path )}; |
293 | $self->sequence->add_edge( @vector ); |
294 | my $fwits = $self->sequence->get_edge_attributes( @vector ); |
295 | @wits{keys %$fwits} = values %$fwits; |
296 | $self->sequence->set_edge_attributes( @vector, \%wits ); |
297 | } |
22222af9 |
298 | $self->relations->merge_readings( $kept, $deleted, $combine_char ); |
3a2ebbf4 |
299 | |
300 | # Do the deletion deed. |
49d4f2ac |
301 | if( $combine_char ) { |
302 | my $kept_obj = $self->reading( $kept ); |
303 | my $new_text = join( $combine_char, $kept_obj->text, |
304 | $self->reading( $deleted )->text ); |
305 | $kept_obj->alter_text( $new_text ); |
306 | } |
3a2ebbf4 |
307 | $self->del_reading( $deleted ); |
308 | } |
7854e12e |
309 | |
3265b0ce |
310 | |
3a2ebbf4 |
311 | # Helper function for manipulating the graph. |
312 | sub _stringify_args { |
313 | my( $self, $first, $second, $arg ) = @_; |
314 | $first = $first->id |
315 | if ref( $first ) eq 'Text::Tradition::Collation::Reading'; |
316 | $second = $second->id |
317 | if ref( $second ) eq 'Text::Tradition::Collation::Reading'; |
318 | return( $first, $second, $arg ); |
319 | } |
df6d9812 |
320 | |
4e5a7b2c |
321 | # Helper function for manipulating the graph. |
322 | sub _objectify_args { |
323 | my( $self, $first, $second, $arg ) = @_; |
324 | $first = $self->reading( $first ) |
325 | unless ref( $first ) eq 'Text::Tradition::Collation::Reading'; |
326 | $second = $self->reading( $second ) |
327 | unless ref( $second ) eq 'Text::Tradition::Collation::Reading'; |
328 | return( $first, $second, $arg ); |
329 | } |
3a2ebbf4 |
330 | ### Path logic |
331 | |
332 | sub add_path { |
333 | my $self = shift; |
334 | |
335 | # We only need the IDs for adding paths to the graph, not the reading |
336 | # objects themselves. |
337 | my( $source, $target, $wit ) = $self->_stringify_args( @_ ); |
338 | |
339 | # Connect the readings |
340 | $self->sequence->add_edge( $source, $target ); |
341 | # Note the witness in question |
342 | $self->sequence->set_edge_attribute( $source, $target, $wit, 1 ); |
b15511bf |
343 | }; |
344 | |
3a2ebbf4 |
345 | sub del_path { |
346 | my $self = shift; |
49d4f2ac |
347 | my @args; |
348 | if( ref( $_[0] ) eq 'ARRAY' ) { |
349 | my $e = shift @_; |
350 | @args = ( @$e, @_ ); |
351 | } else { |
352 | @args = @_; |
353 | } |
3a2ebbf4 |
354 | |
355 | # We only need the IDs for adding paths to the graph, not the reading |
356 | # objects themselves. |
49d4f2ac |
357 | my( $source, $target, $wit ) = $self->_stringify_args( @args ); |
3a2ebbf4 |
358 | |
359 | if( $self->sequence->has_edge_attribute( $source, $target, $wit ) ) { |
49d4f2ac |
360 | $self->sequence->delete_edge_attribute( $source, $target, $wit ); |
3a2ebbf4 |
361 | } |
362 | unless( keys %{$self->sequence->get_edge_attributes( $source, $target )} ) { |
363 | $self->sequence->delete_edge( $source, $target ); |
364 | } |
784877d9 |
365 | } |
366 | |
3a2ebbf4 |
367 | |
15d2d3df |
368 | # Extra graph-alike utility |
369 | sub has_path { |
3a2ebbf4 |
370 | my $self = shift; |
371 | my( $source, $target, $wit ) = $self->_stringify_args( @_ ); |
372 | return undef unless $self->sequence->has_edge( $source, $target ); |
373 | return $self->sequence->has_edge_attribute( $source, $target, $wit ); |
b15511bf |
374 | } |
375 | |
4e5a7b2c |
376 | =head2 clear_witness( @sigil_list ) |
3a2ebbf4 |
377 | |
4e5a7b2c |
378 | Clear the given witnesses out of the collation entirely, removing references |
379 | to them in paths, and removing readings that belong only to them. Should only |
380 | be called via $tradition->del_witness. |
3a2ebbf4 |
381 | |
382 | =cut |
383 | |
4e5a7b2c |
384 | sub clear_witness { |
385 | my( $self, @sigils ) = @_; |
386 | |
387 | # Clear the witness(es) out of the paths |
388 | foreach my $e ( $self->paths ) { |
389 | foreach my $sig ( @sigils ) { |
390 | $self->del_path( $e, $sig ); |
391 | } |
392 | } |
393 | |
394 | # Clear out the newly unused readings |
395 | foreach my $r ( $self->readings ) { |
396 | unless( $self->reading_witnesses( $r ) ) { |
397 | $self->del_reading( $r ); |
398 | } |
399 | } |
400 | } |
3a2ebbf4 |
401 | |
402 | sub add_relationship { |
403 | my $self = shift; |
22222af9 |
404 | my( $source, $target, $opts ) = $self->_stringify_args( @_ ); |
63778331 |
405 | my( @vectors ) = $self->relations->add_relationship( $source, |
64ae6270 |
406 | $self->reading( $source ), $target, $self->reading( $target ), $opts ); |
407 | # Force a full rank recalculation every time. Yuck. |
63778331 |
408 | $self->calculate_ranks() if $self->end->has_rank; |
409 | return @vectors; |
22222af9 |
410 | } |
ef9d481f |
411 | |
22222af9 |
412 | =head2 reading_witnesses( $reading ) |
910a0a6d |
413 | |
22222af9 |
414 | Return a list of sigils corresponding to the witnesses in which the reading appears. |
3265b0ce |
415 | |
22222af9 |
416 | =cut |
1d310495 |
417 | |
1d310495 |
418 | sub reading_witnesses { |
419 | my( $self, $reading ) = @_; |
420 | # We need only check either the incoming or the outgoing edges; I have |
96dc90ec |
421 | # arbitrarily chosen "incoming". Thus, special-case the start node. |
422 | if( $reading eq $self->start ) { |
423 | return map { $_->sigil } $self->tradition->witnesses; |
424 | } |
1d310495 |
425 | my %all_witnesses; |
426 | foreach my $e ( $self->sequence->edges_to( $reading ) ) { |
427 | my $wits = $self->sequence->get_edge_attributes( @$e ); |
428 | @all_witnesses{ keys %$wits } = 1; |
429 | } |
430 | return keys %all_witnesses; |
910a0a6d |
431 | } |
432 | |
4e5a7b2c |
433 | =head1 OUTPUT METHODS |
8e1394aa |
434 | |
0ecb975c |
435 | =head2 as_svg( \%options ) |
8e1394aa |
436 | |
0068967c |
437 | Returns an SVG string that represents the graph, via as_dot and graphviz. |
0ecb975c |
438 | See as_dot for a list of options. |
8e1394aa |
439 | |
440 | =cut |
441 | |
442 | sub as_svg { |
0ecb975c |
443 | my( $self, $opts ) = @_; |
3a2ebbf4 |
444 | |
8e1394aa |
445 | my @cmd = qw/dot -Tsvg/; |
446 | my( $svg, $err ); |
910a0a6d |
447 | my $dotfile = File::Temp->new(); |
a344ffcf |
448 | ## USE FOR DEBUGGING |
eca16057 |
449 | # $dotfile->unlink_on_destroy(0); |
910a0a6d |
450 | binmode $dotfile, ':utf8'; |
0ecb975c |
451 | print $dotfile $self->as_dot( $opts ); |
910a0a6d |
452 | push( @cmd, $dotfile->filename ); |
453 | run( \@cmd, ">", binary(), \$svg ); |
364c71b1 |
454 | return decode_utf8( $svg ); |
8e1394aa |
455 | } |
456 | |
b22576c6 |
457 | |
0ecb975c |
458 | =head2 as_dot( \%options ) |
b22576c6 |
459 | |
0ecb975c |
460 | Returns a string that is the collation graph expressed in dot |
461 | (i.e. GraphViz) format. Options include: |
b22576c6 |
462 | |
0ecb975c |
463 | =over 4 |
b22576c6 |
464 | |
0ecb975c |
465 | =item * from |
b22576c6 |
466 | |
0ecb975c |
467 | =item * to |
df6d9812 |
468 | |
0ecb975c |
469 | =item * color_common |
470 | |
471 | =back |
df6d9812 |
472 | |
473 | =cut |
474 | |
475 | sub as_dot { |
0ecb975c |
476 | my( $self, $opts ) = @_; |
477 | my $startrank = $opts->{'from'} if $opts; |
478 | my $endrank = $opts->{'to'} if $opts; |
479 | my $color_common = $opts->{'color_common'} if $opts; |
b22576c6 |
480 | |
481 | # Check the arguments |
482 | if( $startrank ) { |
483 | return if $endrank && $startrank > $endrank; |
484 | return if $startrank > $self->end->rank; |
485 | } |
486 | if( defined $endrank ) { |
487 | return if $endrank < 0; |
f1b3b33a |
488 | $endrank = undef if $endrank == $self->end->rank; |
b22576c6 |
489 | } |
490 | |
67da8d6c |
491 | my $graph_name = $self->tradition->name; |
492 | $graph_name =~ s/[^\w\s]//g; |
493 | $graph_name = join( '_', split( /\s+/, $graph_name ) ); |
f13b5582 |
494 | |
495 | my %graph_attrs = ( |
496 | 'rankdir' => 'LR', |
497 | 'bgcolor' => 'none', |
498 | ); |
499 | my %node_attrs = ( |
b8990398 |
500 | 'fontsize' => 14, |
f13b5582 |
501 | 'fillcolor' => 'white', |
502 | 'style' => 'filled', |
503 | 'shape' => 'ellipse' |
504 | ); |
505 | my %edge_attrs = ( |
506 | 'arrowhead' => 'open', |
507 | 'color' => '#000000', |
508 | 'fontcolor' => '#000000', |
509 | ); |
510 | |
67da8d6c |
511 | my $dot = sprintf( "digraph %s {\n", $graph_name ); |
f13b5582 |
512 | $dot .= "\tgraph " . _dot_attr_string( \%graph_attrs ) . ";\n"; |
513 | $dot .= "\tnode " . _dot_attr_string( \%node_attrs ) . ";\n"; |
df6d9812 |
514 | |
b22576c6 |
515 | # Output substitute start/end readings if necessary |
516 | if( $startrank ) { |
517 | $dot .= "\t\"#SUBSTART#\" [ label=\"...\" ];\n"; |
518 | } |
519 | if( $endrank ) { |
520 | $dot .= "\t\"#SUBEND#\" [ label=\"...\" ];\n"; |
521 | } |
30ddc24c |
522 | |
b22576c6 |
523 | my %used; # Keep track of the readings that actually appear in the graph |
30ddc24c |
524 | # Sort the readings by rank if we have ranks; this speeds layout. |
525 | my @all_readings = $self->end->has_rank |
526 | ? sort { $a->rank <=> $b->rank } $self->readings |
527 | : $self->readings; |
4633f9e4 |
528 | # TODO Refrain from outputting lacuna nodes - just grey out the edges. |
30ddc24c |
529 | foreach my $reading ( @all_readings ) { |
b22576c6 |
530 | # Only output readings within our rank range. |
531 | next if $startrank && $reading->rank < $startrank; |
532 | next if $endrank && $reading->rank > $endrank; |
533 | $used{$reading->id} = 1; |
910a0a6d |
534 | # Need not output nodes without separate labels |
3a2ebbf4 |
535 | next if $reading->id eq $reading->text; |
d4b75f44 |
536 | my $rattrs; |
30f0df34 |
537 | my $label = $reading->text; |
8f9cab7b |
538 | $label =~ s/\"/\\\"/g; |
d4b75f44 |
539 | $rattrs->{'label'} = $label; |
0ecb975c |
540 | $rattrs->{'fillcolor'} = '#b3f36d' if $reading->is_common && $color_common; |
d4b75f44 |
541 | $dot .= sprintf( "\t\"%s\" %s;\n", $reading->id, _dot_attr_string( $rattrs ) ); |
df6d9812 |
542 | } |
3a2ebbf4 |
543 | |
30ddc24c |
544 | # Add the real edges. Need to weight one edge per rank jump, in a |
545 | # continuous line. |
546 | my $weighted = $self->_add_edge_weights; |
b22576c6 |
547 | my @edges = $self->paths; |
3bdec618 |
548 | my( %substart, %subend ); |
b22576c6 |
549 | foreach my $edge ( @edges ) { |
550 | # Do we need to output this edge? |
508fd430 |
551 | if( $used{$edge->[0]} && $used{$edge->[1]} ) { |
027d819c |
552 | my $label = $self->_path_display_label( $self->path_witnesses( $edge ) ); |
f13b5582 |
553 | my $variables = { %edge_attrs, 'label' => $label }; |
30ddc24c |
554 | |
b22576c6 |
555 | # Account for the rank gap if necessary |
30ddc24c |
556 | my $rank0 = $self->reading( $edge->[0] )->rank |
557 | if $self->reading( $edge->[0] )->has_rank; |
558 | my $rank1 = $self->reading( $edge->[1] )->rank |
559 | if $self->reading( $edge->[1] )->has_rank; |
560 | if( defined $rank0 && defined $rank1 && $rank1 - $rank0 > 1 ) { |
561 | $variables->{'minlen'} = $rank1 - $rank0; |
562 | } |
563 | |
564 | # Add the calculated edge weights |
565 | if( exists $weighted->{$edge->[0]} |
566 | && $weighted->{$edge->[0]} eq $edge->[1] ) { |
567 | # $variables->{'color'} = 'red'; |
568 | $variables->{'weight'} = 3.0; |
b0b4421a |
569 | } |
30ddc24c |
570 | |
508fd430 |
571 | # EXPERIMENTAL: make edge width reflect no. of witnesses |
572 | my $extrawidth = scalar( $self->path_witnesses( $edge ) ) * 0.2; |
573 | $variables->{'penwidth'} = $extrawidth + 0.8; # gives 1 for a single wit |
574 | |
f13b5582 |
575 | my $varopts = _dot_attr_string( $variables ); |
576 | $dot .= sprintf( "\t\"%s\" -> \"%s\" %s;\n", |
577 | $edge->[0], $edge->[1], $varopts ); |
3bdec618 |
578 | } elsif( $used{$edge->[0]} ) { |
579 | $subend{$edge->[0]} = 1; |
580 | } elsif( $used{$edge->[1]} ) { |
581 | $substart{$edge->[1]} = 1; |
b22576c6 |
582 | } |
df6d9812 |
583 | } |
3bdec618 |
584 | # Add substitute start and end edges if necessary |
585 | foreach my $node ( keys %substart ) { |
027d819c |
586 | my $witstr = $self->_path_display_label ( $self->reading_witnesses( $self->reading( $node ) ) ); |
f13b5582 |
587 | my $variables = { %edge_attrs, 'label' => $witstr }; |
588 | my $varopts = _dot_attr_string( $variables ); |
589 | $dot .= "\t\"#SUBSTART#\" -> \"$node\" $varopts;"; |
3bdec618 |
590 | } |
591 | foreach my $node ( keys %subend ) { |
027d819c |
592 | my $witstr = $self->_path_display_label ( $self->reading_witnesses( $self->reading( $node ) ) ); |
f13b5582 |
593 | my $variables = { %edge_attrs, 'label' => $witstr }; |
594 | my $varopts = _dot_attr_string( $variables ); |
595 | $dot .= "\t\"$node\" -> \"#SUBEND#\" $varopts;"; |
3bdec618 |
596 | } |
30ddc24c |
597 | |
df6d9812 |
598 | $dot .= "}\n"; |
599 | return $dot; |
600 | } |
601 | |
f13b5582 |
602 | sub _dot_attr_string { |
603 | my( $hash ) = @_; |
604 | my @attrs; |
605 | foreach my $k ( sort keys %$hash ) { |
606 | my $v = $hash->{$k}; |
607 | push( @attrs, $k.'="'.$v.'"' ); |
608 | } |
609 | return( '[ ' . join( ', ', @attrs ) . ' ]' ); |
610 | } |
611 | |
30ddc24c |
612 | sub _add_edge_weights { |
613 | my $self = shift; |
614 | # Walk the graph from START to END, choosing the successor node with |
615 | # the largest number of witness paths each time. |
616 | my $weighted = {}; |
617 | my $curr = $self->start->id; |
008fc8a6 |
618 | my $ranked = $self->end->has_rank; |
30ddc24c |
619 | while( $curr ne $self->end->id ) { |
008fc8a6 |
620 | my $rank = $ranked ? $self->reading( $curr )->rank : 0; |
30ddc24c |
621 | my @succ = sort { $self->path_witnesses( $curr, $a ) |
622 | <=> $self->path_witnesses( $curr, $b ) } |
623 | $self->sequence->successors( $curr ); |
624 | my $next = pop @succ; |
008fc8a6 |
625 | my $nextrank = $ranked ? $self->reading( $next )->rank : 0; |
30ddc24c |
626 | # Try to avoid lacunae in the weighted path. |
008fc8a6 |
627 | while( @succ && |
628 | ( $self->reading( $next )->is_lacuna || |
629 | $nextrank - $rank > 1 ) ){ |
30ddc24c |
630 | $next = pop @succ; |
631 | } |
632 | $weighted->{$curr} = $next; |
633 | $curr = $next; |
634 | } |
635 | return $weighted; |
636 | } |
637 | |
027d819c |
638 | =head2 path_witnesses( $edge ) |
639 | |
640 | Returns the list of sigils whose witnesses are associated with the given edge. |
641 | The edge can be passed as either an array or an arrayref of ( $source, $target ). |
642 | |
643 | =cut |
644 | |
3a2ebbf4 |
645 | sub path_witnesses { |
646 | my( $self, @edge ) = @_; |
647 | # If edge is an arrayref, cope. |
648 | if( @edge == 1 && ref( $edge[0] ) eq 'ARRAY' ) { |
649 | my $e = shift @edge; |
650 | @edge = @$e; |
651 | } |
652 | my @wits = keys %{$self->sequence->get_edge_attributes( @edge )}; |
508fd430 |
653 | return @wits; |
3a2ebbf4 |
654 | } |
655 | |
027d819c |
656 | sub _path_display_label { |
508fd430 |
657 | my $self = shift; |
658 | my @wits = sort @_; |
8f9cab7b |
659 | my $maj = scalar( $self->tradition->witnesses ) * 0.6; |
660 | if( scalar @wits > $maj ) { |
f13b5582 |
661 | # TODO break out a.c. wits |
8f9cab7b |
662 | return 'majority'; |
663 | } else { |
664 | return join( ', ', @wits ); |
665 | } |
666 | } |
667 | |
668 | |
4e5a7b2c |
669 | =head2 as_graphml |
8e1394aa |
670 | |
4e5a7b2c |
671 | Returns a GraphML representation of the collation. The GraphML will contain |
672 | two graphs. The first expresses the attributes of the readings and the witness |
673 | paths that link them; the second expresses the relationships that link the |
674 | readings. This is the native transfer format for a tradition. |
8e1394aa |
675 | |
56eefa04 |
676 | =begin testing |
677 | |
678 | use Text::Tradition; |
679 | |
680 | my $READINGS = 311; |
681 | my $PATHS = 361; |
682 | |
683 | my $datafile = 't/data/florilegium_tei_ps.xml'; |
684 | my $tradition = Text::Tradition->new( 'input' => 'TEI', |
685 | 'name' => 'test0', |
686 | 'file' => $datafile, |
687 | 'linear' => 1 ); |
688 | |
689 | ok( $tradition, "Got a tradition object" ); |
690 | is( scalar $tradition->witnesses, 13, "Found all witnesses" ); |
691 | ok( $tradition->collation, "Tradition has a collation" ); |
692 | |
693 | my $c = $tradition->collation; |
694 | is( scalar $c->readings, $READINGS, "Collation has all readings" ); |
695 | is( scalar $c->paths, $PATHS, "Collation has all paths" ); |
696 | is( scalar $c->relationships, 0, "Collation has all relationships" ); |
697 | |
698 | # Add a few relationships |
699 | $c->add_relationship( 'w123', 'w125', { 'type' => 'collated' } ); |
700 | $c->add_relationship( 'w193', 'w196', { 'type' => 'collated' } ); |
701 | $c->add_relationship( 'w257', 'w262', { 'type' => 'transposition' } ); |
702 | |
703 | # Now write it to GraphML and parse it again. |
704 | |
705 | my $graphml = $c->as_graphml; |
706 | my $st = Text::Tradition->new( 'input' => 'Self', 'string' => $graphml ); |
707 | is( scalar $st->collation->readings, $READINGS, "Reparsed collation has all readings" ); |
708 | is( scalar $st->collation->paths, $PATHS, "Reparsed collation has all paths" ); |
709 | is( scalar $st->collation->relationships, 3, "Reparsed collation has new relationships" ); |
710 | |
711 | =end testing |
712 | |
8e1394aa |
713 | =cut |
714 | |
715 | sub as_graphml { |
3a2ebbf4 |
716 | my( $self ) = @_; |
8e1394aa |
717 | |
718 | # Some namespaces |
719 | my $graphml_ns = 'http://graphml.graphdrawing.org/xmlns'; |
720 | my $xsi_ns = 'http://www.w3.org/2001/XMLSchema-instance'; |
721 | my $graphml_schema = 'http://graphml.graphdrawing.org/xmlns ' . |
910a0a6d |
722 | 'http://graphml.graphdrawing.org/xmlns/1.0/graphml.xsd'; |
8e1394aa |
723 | |
724 | # Create the document and root node |
725 | my $graphml = XML::LibXML->createDocument( "1.0", "UTF-8" ); |
726 | my $root = $graphml->createElementNS( $graphml_ns, 'graphml' ); |
727 | $graphml->setDocumentElement( $root ); |
728 | $root->setNamespace( $xsi_ns, 'xsi', 0 ); |
729 | $root->setAttributeNS( $xsi_ns, 'schemaLocation', $graphml_schema ); |
730 | |
e309421a |
731 | # Add the data keys for the graph |
732 | my %graph_data_keys; |
733 | my $gdi = 0; |
1d310495 |
734 | my @graph_attributes = qw/ version wit_list_separator baselabel linear ac_label /; |
e309421a |
735 | foreach my $datum ( @graph_attributes ) { |
736 | $graph_data_keys{$datum} = 'dg'.$gdi++; |
737 | my $key = $root->addNewChild( $graphml_ns, 'key' ); |
738 | $key->setAttribute( 'attr.name', $datum ); |
739 | $key->setAttribute( 'attr.type', $key eq 'linear' ? 'boolean' : 'string' ); |
740 | $key->setAttribute( 'for', 'graph' ); |
741 | $key->setAttribute( 'id', $graph_data_keys{$datum} ); |
742 | } |
f6066bac |
743 | |
8e1394aa |
744 | # Add the data keys for nodes |
ef9d481f |
745 | my %node_data_keys; |
746 | my $ndi = 0; |
3a2ebbf4 |
747 | my %node_data = ( |
748 | id => 'string', |
255875b8 |
749 | text => 'string', |
3a2ebbf4 |
750 | rank => 'string', |
751 | is_start => 'boolean', |
752 | is_end => 'boolean', |
753 | is_lacuna => 'boolean', |
754 | ); |
755 | foreach my $datum ( keys %node_data ) { |
910a0a6d |
756 | $node_data_keys{$datum} = 'dn'.$ndi++; |
757 | my $key = $root->addNewChild( $graphml_ns, 'key' ); |
758 | $key->setAttribute( 'attr.name', $datum ); |
3a2ebbf4 |
759 | $key->setAttribute( 'attr.type', $node_data{$datum} ); |
910a0a6d |
760 | $key->setAttribute( 'for', 'node' ); |
761 | $key->setAttribute( 'id', $node_data_keys{$datum} ); |
8e1394aa |
762 | } |
763 | |
df6d9812 |
764 | # Add the data keys for edges, i.e. witnesses |
ef9d481f |
765 | my $edi = 0; |
766 | my %edge_data_keys; |
3a2ebbf4 |
767 | my %edge_data = ( |
f523c7a8 |
768 | class => 'string', # Class, deprecated soon |
3a2ebbf4 |
769 | witness => 'string', # ID/label for a path |
770 | relationship => 'string', # ID/label for a relationship |
771 | extra => 'boolean', # Path key |
c84275ff |
772 | scope => 'string', # Relationship key |
3a2ebbf4 |
773 | non_correctable => 'boolean', # Relationship key |
774 | non_independent => 'boolean', # Relationship key |
775 | ); |
776 | foreach my $datum ( keys %edge_data ) { |
777 | $edge_data_keys{$datum} = 'de'.$edi++; |
910a0a6d |
778 | my $key = $root->addNewChild( $graphml_ns, 'key' ); |
3a2ebbf4 |
779 | $key->setAttribute( 'attr.name', $datum ); |
780 | $key->setAttribute( 'attr.type', $edge_data{$datum} ); |
910a0a6d |
781 | $key->setAttribute( 'for', 'edge' ); |
3a2ebbf4 |
782 | $key->setAttribute( 'id', $edge_data_keys{$datum} ); |
8e1394aa |
783 | } |
3a2ebbf4 |
784 | |
22222af9 |
785 | # Add the collation graph itself |
2c669bca |
786 | my $sgraph = $root->addNewChild( $graphml_ns, 'graph' ); |
787 | $sgraph->setAttribute( 'edgedefault', 'directed' ); |
788 | $sgraph->setAttribute( 'id', $self->tradition->name ); |
789 | $sgraph->setAttribute( 'parse.edgeids', 'canonical' ); |
790 | $sgraph->setAttribute( 'parse.edges', scalar($self->paths) ); |
791 | $sgraph->setAttribute( 'parse.nodeids', 'canonical' ); |
792 | $sgraph->setAttribute( 'parse.nodes', scalar($self->readings) ); |
793 | $sgraph->setAttribute( 'parse.order', 'nodesfirst' ); |
22222af9 |
794 | |
e309421a |
795 | # Collation attribute data |
796 | foreach my $datum ( @graph_attributes ) { |
2c669bca |
797 | my $value = $datum eq 'version' ? '3.0' : $self->$datum; |
798 | _add_graphml_data( $sgraph, $graph_data_keys{$datum}, $value ); |
e309421a |
799 | } |
8e1394aa |
800 | |
801 | my $node_ctr = 0; |
802 | my %node_hash; |
22222af9 |
803 | # Add our readings to the graph |
3a2ebbf4 |
804 | foreach my $n ( sort { $a->id cmp $b->id } $self->readings ) { |
2c669bca |
805 | # Add to the main graph |
806 | my $node_el = $sgraph->addNewChild( $graphml_ns, 'node' ); |
910a0a6d |
807 | my $node_xmlid = 'n' . $node_ctr++; |
3a2ebbf4 |
808 | $node_hash{ $n->id } = $node_xmlid; |
910a0a6d |
809 | $node_el->setAttribute( 'id', $node_xmlid ); |
255875b8 |
810 | foreach my $d ( keys %node_data ) { |
811 | my $nval = $n->$d; |
812 | _add_graphml_data( $node_el, $node_data_keys{$d}, $nval ) |
813 | if defined $nval; |
814 | } |
b15511bf |
815 | } |
816 | |
2c669bca |
817 | # Add the path edges to the sequence graph |
df6d9812 |
818 | my $edge_ctr = 0; |
3a2ebbf4 |
819 | foreach my $e ( sort { $a->[0] cmp $b->[0] } $self->sequence->edges() ) { |
820 | # We add an edge in the graphml for every witness in $e. |
508fd430 |
821 | foreach my $wit ( sort $self->path_witnesses( $e ) ) { |
3a2ebbf4 |
822 | my( $id, $from, $to ) = ( 'e'.$edge_ctr++, |
823 | $node_hash{ $e->[0] }, |
824 | $node_hash{ $e->[1] } ); |
2c669bca |
825 | my $edge_el = $sgraph->addNewChild( $graphml_ns, 'edge' ); |
3a2ebbf4 |
826 | $edge_el->setAttribute( 'source', $from ); |
827 | $edge_el->setAttribute( 'target', $to ); |
828 | $edge_el->setAttribute( 'id', $id ); |
3a2ebbf4 |
829 | |
830 | # It's a witness path, so add the witness |
831 | my $base = $wit; |
832 | my $key = $edge_data_keys{'witness'}; |
833 | # Is this an ante-corr witness? |
834 | my $aclabel = $self->ac_label; |
835 | if( $wit =~ /^(.*)\Q$aclabel\E$/ ) { |
836 | # Keep the base witness |
837 | $base = $1; |
838 | # ...and record that this is an 'extra' reading path |
839 | _add_graphml_data( $edge_el, $edge_data_keys{'extra'}, $aclabel ); |
840 | } |
841 | _add_graphml_data( $edge_el, $edge_data_keys{'witness'}, $base ); |
f523c7a8 |
842 | _add_graphml_data( $edge_el, $edge_data_keys{'class'}, 'path' ); |
3a2ebbf4 |
843 | } |
844 | } |
845 | |
22222af9 |
846 | # Add the relationship graph to the XML |
027d819c |
847 | $self->relations->_as_graphml( $graphml_ns, $root, \%node_hash, |
2626f709 |
848 | $node_data_keys{'id'}, \%edge_data_keys ); |
8e1394aa |
849 | |
94c00c71 |
850 | # Save and return the thing |
851 | my $result = decode_utf8( $graphml->toString(1) ); |
94c00c71 |
852 | return $result; |
df6d9812 |
853 | } |
854 | |
b15511bf |
855 | sub _add_graphml_data { |
856 | my( $el, $key, $value ) = @_; |
b15511bf |
857 | return unless defined $value; |
c9bf3dbf |
858 | my $data_el = $el->addNewChild( $el->namespaceURI, 'data' ); |
b15511bf |
859 | $data_el->setAttribute( 'key', $key ); |
860 | $data_el->appendText( $value ); |
8e1394aa |
861 | } |
862 | |
4e5a7b2c |
863 | =head2 as_csv |
910a0a6d |
864 | |
865 | Returns a CSV alignment table representation of the collation graph, one |
2c669bca |
866 | row per witness (or witness uncorrected.) |
910a0a6d |
867 | |
868 | =cut |
869 | |
870 | sub as_csv { |
3a2ebbf4 |
871 | my( $self ) = @_; |
910a0a6d |
872 | my $table = $self->make_alignment_table; |
873 | my $csv = Text::CSV_XS->new( { binary => 1, quote_null => 0 } ); |
874 | my @result; |
2c669bca |
875 | # Make the header row |
876 | $csv->combine( map { $_->{'witness'} } @{$table->{'alignment'}} ); |
877 | push( @result, decode_utf8( $csv->string ) ); |
878 | # Make the rest of the rows |
879 | foreach my $idx ( 0 .. $table->{'length'} - 1 ) { |
566f4595 |
880 | my @rowobjs = map { $_->{'tokens'}->[$idx] } @{$table->{'alignment'}}; |
2c669bca |
881 | my @row = map { $_ ? $_->{'t'} : $_ } @rowobjs; |
882 | $csv->combine( @row ); |
910a0a6d |
883 | push( @result, decode_utf8( $csv->string ) ); |
884 | } |
3a2ebbf4 |
885 | return join( "\n", @result ); |
910a0a6d |
886 | } |
887 | |
4e5a7b2c |
888 | =head2 make_alignment_table( $use_refs, $include_witnesses ) |
2c669bca |
889 | |
566f4595 |
890 | Return a reference to an alignment table, in a slightly enhanced CollateX |
891 | format which looks like this: |
892 | |
893 | $table = { alignment => [ { witness => "SIGIL", |
4e5a7b2c |
894 | tokens => [ { t => "TEXT" }, ... ] }, |
566f4595 |
895 | { witness => "SIG2", |
4e5a7b2c |
896 | tokens => [ { t => "TEXT" }, ... ] }, |
566f4595 |
897 | ... ], |
898 | length => TEXTLEN }; |
899 | |
900 | If $use_refs is set to 1, the reading object is returned in the table |
901 | instead of READINGTEXT; if not, the text of the reading is returned. |
4e5a7b2c |
902 | |
903 | If $include_witnesses is set to a hashref, only the witnesses whose sigil |
566f4595 |
904 | keys have a true hash value will be included. |
2c669bca |
905 | |
906 | =cut |
9f3ba6f7 |
907 | |
910a0a6d |
908 | sub make_alignment_table { |
08e0fb85 |
909 | my( $self, $noderefs, $include ) = @_; |
0ecb975c |
910 | # Make sure we can do this |
911 | throw( "Need a linear graph in order to make an alignment table" ) |
912 | unless $self->linear; |
913 | $self->calculate_ranks unless $self->end->has_rank; |
914 | |
2c669bca |
915 | my $table = { 'alignment' => [], 'length' => $self->end->rank - 1 }; |
3a2ebbf4 |
916 | my @all_pos = ( 1 .. $self->end->rank - 1 ); |
68454b71 |
917 | foreach my $wit ( sort { $a->sigil cmp $b->sigil } $self->tradition->witnesses ) { |
2c669bca |
918 | if( $include ) { |
566f4595 |
919 | next unless $include->{$wit->sigil}; |
2c669bca |
920 | } |
eca16057 |
921 | # print STDERR "Making witness row(s) for " . $wit->sigil . "\n"; |
1f7aa795 |
922 | my @wit_path = $self->reading_sequence( $self->start, $self->end, $wit->sigil ); |
923 | my @row = _make_witness_row( \@wit_path, \@all_pos, $noderefs ); |
2c669bca |
924 | push( @{$table->{'alignment'}}, |
925 | { 'witness' => $wit->sigil, 'tokens' => \@row } ); |
1f7aa795 |
926 | if( $wit->is_layered ) { |
927 | my @wit_ac_path = $self->reading_sequence( $self->start, $self->end, |
861c3e27 |
928 | $wit->sigil.$self->ac_label ); |
1f7aa795 |
929 | my @ac_row = _make_witness_row( \@wit_ac_path, \@all_pos, $noderefs ); |
2c669bca |
930 | push( @{$table->{'alignment'}}, |
931 | { 'witness' => $wit->sigil.$self->ac_label, 'tokens' => \@ac_row } ); |
910a0a6d |
932 | } |
933 | } |
2c669bca |
934 | return $table; |
910a0a6d |
935 | } |
936 | |
937 | sub _make_witness_row { |
0e476982 |
938 | my( $path, $positions, $noderefs ) = @_; |
910a0a6d |
939 | my %char_hash; |
940 | map { $char_hash{$_} = undef } @$positions; |
2c669bca |
941 | my $debug = 0; |
910a0a6d |
942 | foreach my $rdg ( @$path ) { |
eca16057 |
943 | my $rtext = $rdg->text; |
944 | $rtext = '#LACUNA#' if $rdg->is_lacuna; |
2c669bca |
945 | print STDERR "rank " . $rdg->rank . "\n" if $debug; |
3a2ebbf4 |
946 | # print STDERR "No rank for " . $rdg->id . "\n" unless defined $rdg->rank; |
2c669bca |
947 | $char_hash{$rdg->rank} = $noderefs ? { 't' => $rdg } |
948 | : { 't' => $rtext }; |
910a0a6d |
949 | } |
950 | my @row = map { $char_hash{$_} } @$positions; |
eca16057 |
951 | # Fill in lacuna markers for undef spots in the row |
952 | my $last_el = shift @row; |
953 | my @filled_row = ( $last_el ); |
954 | foreach my $el ( @row ) { |
0e476982 |
955 | # If we are using node reference, make the lacuna node appear many times |
956 | # in the table. If not, use the lacuna tag. |
957 | if( $last_el && _el_is_lacuna( $last_el ) && !defined $el ) { |
566f4595 |
958 | $el = $noderefs ? $last_el : { 't' => '#LACUNA#' }; |
eca16057 |
959 | } |
960 | push( @filled_row, $el ); |
961 | $last_el = $el; |
962 | } |
963 | return @filled_row; |
910a0a6d |
964 | } |
965 | |
0e476982 |
966 | # Tiny utility function to say if a table element is a lacuna |
967 | sub _el_is_lacuna { |
968 | my $el = shift; |
2c669bca |
969 | return 1 if $el->{'t'} eq '#LACUNA#'; |
970 | return 1 if ref( $el->{'t'} ) eq 'Text::Tradition::Collation::Reading' |
971 | && $el->{'t'}->is_lacuna; |
0e476982 |
972 | return 0; |
973 | } |
974 | |
910a0a6d |
975 | # Helper to turn the witnesses along columns rather than rows. Assumes |
976 | # equal-sized rows. |
977 | sub _turn_table { |
978 | my( $table ) = @_; |
979 | my $result = []; |
980 | return $result unless scalar @$table; |
981 | my $nrows = scalar @{$table->[0]}; |
982 | foreach my $idx ( 0 .. $nrows - 1 ) { |
983 | foreach my $wit ( 0 .. $#{$table} ) { |
984 | $result->[$idx]->[$wit] = $table->[$wit]->[$idx]; |
985 | } |
986 | } |
987 | return $result; |
988 | } |
989 | |
4e5a7b2c |
990 | =head1 NAVIGATION METHODS |
910a0a6d |
991 | |
4e5a7b2c |
992 | =head2 reading_sequence( $first, $last, $sigil, $backup ) |
e2902068 |
993 | |
994 | Returns the ordered list of readings, starting with $first and ending |
4e5a7b2c |
995 | with $last, for the witness given in $sigil. If a $backup sigil is |
996 | specified (e.g. when walking a layered witness), it will be used wherever |
997 | no $sigil path exists. If there is a base text reading, that will be |
998 | used wherever no path exists for $sigil or $backup. |
e2902068 |
999 | |
1000 | =cut |
1001 | |
910a0a6d |
1002 | # TODO Think about returning some lazy-eval iterator. |
b0b4421a |
1003 | # TODO Get rid of backup; we should know from what witness is whether we need it. |
910a0a6d |
1004 | |
e2902068 |
1005 | sub reading_sequence { |
861c3e27 |
1006 | my( $self, $start, $end, $witness ) = @_; |
e2902068 |
1007 | |
930ff666 |
1008 | $witness = $self->baselabel unless $witness; |
e2902068 |
1009 | my @readings = ( $start ); |
1010 | my %seen; |
1011 | my $n = $start; |
3a2ebbf4 |
1012 | while( $n && $n->id ne $end->id ) { |
1013 | if( exists( $seen{$n->id} ) ) { |
63778331 |
1014 | throw( "Detected loop for $witness at " . $n->id ); |
910a0a6d |
1015 | } |
3a2ebbf4 |
1016 | $seen{$n->id} = 1; |
910a0a6d |
1017 | |
861c3e27 |
1018 | my $next = $self->next_reading( $n, $witness ); |
44771cf2 |
1019 | unless( $next ) { |
63778331 |
1020 | throw( "Did not find any path for $witness from reading " . $n->id ); |
44771cf2 |
1021 | } |
910a0a6d |
1022 | push( @readings, $next ); |
1023 | $n = $next; |
e2902068 |
1024 | } |
1025 | # Check that the last reading is our end reading. |
1026 | my $last = $readings[$#readings]; |
63778331 |
1027 | throw( "Last reading found from " . $start->text . |
1028 | " for witness $witness is not the end!" ) # TODO do we get this far? |
3a2ebbf4 |
1029 | unless $last->id eq $end->id; |
e2902068 |
1030 | |
1031 | return @readings; |
1032 | } |
1033 | |
4e5a7b2c |
1034 | =head2 next_reading( $reading, $sigil ); |
8e1394aa |
1035 | |
4a8828f0 |
1036 | Returns the reading that follows the given reading along the given witness |
930ff666 |
1037 | path. |
8e1394aa |
1038 | |
1039 | =cut |
1040 | |
4a8828f0 |
1041 | sub next_reading { |
e2902068 |
1042 | # Return the successor via the corresponding path. |
8e1394aa |
1043 | my $self = shift; |
3a2ebbf4 |
1044 | my $answer = $self->_find_linked_reading( 'next', @_ ); |
2c669bca |
1045 | return undef unless $answer; |
3a2ebbf4 |
1046 | return $self->reading( $answer ); |
8e1394aa |
1047 | } |
1048 | |
4e5a7b2c |
1049 | =head2 prior_reading( $reading, $sigil ) |
8e1394aa |
1050 | |
4a8828f0 |
1051 | Returns the reading that precedes the given reading along the given witness |
930ff666 |
1052 | path. |
8e1394aa |
1053 | |
1054 | =cut |
1055 | |
4a8828f0 |
1056 | sub prior_reading { |
e2902068 |
1057 | # Return the predecessor via the corresponding path. |
8e1394aa |
1058 | my $self = shift; |
3a2ebbf4 |
1059 | my $answer = $self->_find_linked_reading( 'prior', @_ ); |
1060 | return $self->reading( $answer ); |
8e1394aa |
1061 | } |
1062 | |
4a8828f0 |
1063 | sub _find_linked_reading { |
861c3e27 |
1064 | my( $self, $direction, $node, $path ) = @_; |
1065 | |
1066 | # Get a backup if we are dealing with a layered witness |
1067 | my $alt_path; |
1068 | my $aclabel = $self->ac_label; |
1069 | if( $path && $path =~ /^(.*)\Q$aclabel\E$/ ) { |
1070 | $alt_path = $1; |
1071 | } |
1072 | |
e2902068 |
1073 | my @linked_paths = $direction eq 'next' |
3a2ebbf4 |
1074 | ? $self->sequence->edges_from( $node ) |
1075 | : $self->sequence->edges_to( $node ); |
e2902068 |
1076 | return undef unless scalar( @linked_paths ); |
8e1394aa |
1077 | |
e2902068 |
1078 | # We have to find the linked path that contains all of the |
1079 | # witnesses supplied in $path. |
1080 | my( @path_wits, @alt_path_wits ); |
4e5a7b2c |
1081 | @path_wits = sort( $self->_witnesses_of_label( $path ) ) if $path; |
1082 | @alt_path_wits = sort( $self->_witnesses_of_label( $alt_path ) ) if $alt_path; |
e2902068 |
1083 | my $base_le; |
1084 | my $alt_le; |
1085 | foreach my $le ( @linked_paths ) { |
3a2ebbf4 |
1086 | if( $self->sequence->has_edge_attribute( @$le, $self->baselabel ) ) { |
910a0a6d |
1087 | $base_le = $le; |
910a0a6d |
1088 | } |
508fd430 |
1089 | my @le_wits = sort $self->path_witnesses( $le ); |
3a2ebbf4 |
1090 | if( _is_within( \@path_wits, \@le_wits ) ) { |
1091 | # This is the right path. |
1092 | return $direction eq 'next' ? $le->[1] : $le->[0]; |
1093 | } elsif( _is_within( \@alt_path_wits, \@le_wits ) ) { |
1094 | $alt_le = $le; |
1095 | } |
8e1394aa |
1096 | } |
e2902068 |
1097 | # Got this far? Return the alternate path if it exists. |
3a2ebbf4 |
1098 | return $direction eq 'next' ? $alt_le->[1] : $alt_le->[0] |
910a0a6d |
1099 | if $alt_le; |
e2902068 |
1100 | |
1101 | # Got this far? Return the base path if it exists. |
3a2ebbf4 |
1102 | return $direction eq 'next' ? $base_le->[1] : $base_le->[0] |
910a0a6d |
1103 | if $base_le; |
e2902068 |
1104 | |
1105 | # Got this far? We have no appropriate path. |
2c669bca |
1106 | warn "Could not find $direction node from " . $node->id |
910a0a6d |
1107 | . " along path $path"; |
8e1394aa |
1108 | return undef; |
1109 | } |
1110 | |
4a8828f0 |
1111 | # Some set logic. |
1112 | sub _is_within { |
1113 | my( $set1, $set2 ) = @_; |
7854e12e |
1114 | my $ret = @$set1; # will be 0, i.e. false, if set1 is empty |
4a8828f0 |
1115 | foreach my $el ( @$set1 ) { |
910a0a6d |
1116 | $ret = 0 unless grep { /^\Q$el\E$/ } @$set2; |
4a8828f0 |
1117 | } |
1118 | return $ret; |
1119 | } |
1120 | |
4e5a7b2c |
1121 | # Return the string that joins together a list of witnesses for |
1122 | # display on a single path. |
1123 | sub _witnesses_of_label { |
1124 | my( $self, $label ) = @_; |
1125 | my $regex = $self->wit_list_separator; |
1126 | my @answer = split( /\Q$regex\E/, $label ); |
1127 | return @answer; |
b0b4421a |
1128 | } |
1129 | |
d4b75f44 |
1130 | =head2 common_readings |
1131 | |
1132 | Returns the list of common readings in the graph (i.e. those readings that are |
1133 | shared by all non-lacunose witnesses.) |
1134 | |
1135 | =cut |
1136 | |
1137 | sub common_readings { |
1138 | my $self = shift; |
1139 | my @common = grep { $_->is_common } $self->readings; |
1140 | return @common; |
1141 | } |
1142 | |
b0b4421a |
1143 | =head2 path_text( $sigil, $mainsigil [, $start, $end ] ) |
1144 | |
1145 | Returns the text of a witness (plus its backup, if we are using a layer) |
1146 | as stored in the collation. The text is returned as a string, where the |
1147 | individual readings are joined with spaces and the meta-readings (e.g. |
1148 | lacunae) are omitted. Optional specification of $start and $end allows |
1149 | the generation of a subset of the witness text. |
4e5a7b2c |
1150 | |
b0b4421a |
1151 | =cut |
1152 | |
1153 | sub path_text { |
861c3e27 |
1154 | my( $self, $wit, $start, $end ) = @_; |
b0b4421a |
1155 | $start = $self->start unless $start; |
1156 | $end = $self->end unless $end; |
861c3e27 |
1157 | my @path = grep { !$_->is_meta } $self->reading_sequence( $start, $end, $wit ); |
b0b4421a |
1158 | return join( ' ', map { $_->text } @path ); |
1159 | } |
4e5a7b2c |
1160 | |
1161 | =head1 INITIALIZATION METHODS |
1162 | |
1163 | These are mostly for use by parsers. |
1164 | |
1165 | =head2 make_witness_path( $witness ) |
1166 | |
1167 | Link the array of readings contained in $witness->path (and in |
1168 | $witness->uncorrected_path if it exists) into collation paths. |
1169 | Clear out the arrays when finished. |
de51424a |
1170 | |
4e5a7b2c |
1171 | =head2 make_witness_paths |
1172 | |
1173 | Call make_witness_path for all witnesses in the tradition. |
1174 | |
1175 | =cut |
930ff666 |
1176 | |
7e450e44 |
1177 | # For use when a collation is constructed from a base text and an apparatus. |
1178 | # We have the sequences of readings and just need to add path edges. |
1f7aa795 |
1179 | # When we are done, clear out the witness path attributes, as they are no |
1180 | # longer needed. |
1181 | # TODO Find a way to replace the witness path attributes with encapsulated functions? |
e2902068 |
1182 | |
6a222840 |
1183 | sub make_witness_paths { |
1184 | my( $self ) = @_; |
910a0a6d |
1185 | foreach my $wit ( $self->tradition->witnesses ) { |
0068967c |
1186 | # print STDERR "Making path for " . $wit->sigil . "\n"; |
910a0a6d |
1187 | $self->make_witness_path( $wit ); |
7854e12e |
1188 | } |
7854e12e |
1189 | } |
1190 | |
6a222840 |
1191 | sub make_witness_path { |
7854e12e |
1192 | my( $self, $wit ) = @_; |
1193 | my @chain = @{$wit->path}; |
15d2d3df |
1194 | my $sig = $wit->sigil; |
7854e12e |
1195 | foreach my $idx ( 0 .. $#chain-1 ) { |
910a0a6d |
1196 | $self->add_path( $chain[$idx], $chain[$idx+1], $sig ); |
7854e12e |
1197 | } |
1f7aa795 |
1198 | if( $wit->is_layered ) { |
d9e873d0 |
1199 | @chain = @{$wit->uncorrected_path}; |
1200 | foreach my $idx( 0 .. $#chain-1 ) { |
1201 | my $source = $chain[$idx]; |
1202 | my $target = $chain[$idx+1]; |
1203 | $self->add_path( $source, $target, $sig.$self->ac_label ) |
1204 | unless $self->has_path( $source, $target, $sig ); |
1205 | } |
15d2d3df |
1206 | } |
1f7aa795 |
1207 | $wit->clear_path; |
1208 | $wit->clear_uncorrected_path; |
e2902068 |
1209 | } |
1210 | |
4e5a7b2c |
1211 | =head2 calculate_ranks |
1212 | |
1213 | Calculate the reading ranks (that is, their aligned positions relative |
1214 | to each other) for the graph. This can only be called on linear collations. |
1215 | |
1216 | =cut |
1217 | |
910a0a6d |
1218 | sub calculate_ranks { |
1219 | my $self = shift; |
1220 | # Walk a version of the graph where every node linked by a relationship |
1221 | # edge is fundamentally the same node, and do a topological ranking on |
1222 | # the nodes in this graph. |
c9bf3dbf |
1223 | my $topo_graph = Graph->new(); |
910a0a6d |
1224 | my %rel_containers; |
1225 | my $rel_ctr = 0; |
1226 | # Add the nodes |
1227 | foreach my $r ( $self->readings ) { |
3a2ebbf4 |
1228 | next if exists $rel_containers{$r->id}; |
910a0a6d |
1229 | my @rels = $r->related_readings( 'colocated' ); |
1230 | if( @rels ) { |
1231 | # Make a relationship container. |
1232 | push( @rels, $r ); |
c9bf3dbf |
1233 | my $rn = 'rel_container_' . $rel_ctr++; |
1234 | $topo_graph->add_vertex( $rn ); |
910a0a6d |
1235 | foreach( @rels ) { |
3a2ebbf4 |
1236 | $rel_containers{$_->id} = $rn; |
910a0a6d |
1237 | } |
1238 | } else { |
1239 | # Add a new node to mirror the old node. |
3a2ebbf4 |
1240 | $rel_containers{$r->id} = $r->id; |
1241 | $topo_graph->add_vertex( $r->id ); |
910a0a6d |
1242 | } |
4a8828f0 |
1243 | } |
3a1f2523 |
1244 | |
3a2ebbf4 |
1245 | # Add the edges. |
910a0a6d |
1246 | foreach my $r ( $self->readings ) { |
3a2ebbf4 |
1247 | foreach my $n ( $self->sequence->successors( $r->id ) ) { |
1248 | my( $tfrom, $tto ) = ( $rel_containers{$r->id}, |
1249 | $rel_containers{$n} ); |
4e5a7b2c |
1250 | # $DB::single = 1 unless $tfrom && $tto; |
3a2ebbf4 |
1251 | $topo_graph->add_edge( $tfrom, $tto ); |
910a0a6d |
1252 | } |
1253 | } |
1254 | |
1255 | # Now do the rankings, starting with the start node. |
3a2ebbf4 |
1256 | my $topo_start = $rel_containers{$self->start->id}; |
c9bf3dbf |
1257 | my $node_ranks = { $topo_start => 0 }; |
910a0a6d |
1258 | my @curr_origin = ( $topo_start ); |
1259 | # A little iterative function. |
1260 | while( @curr_origin ) { |
c9bf3dbf |
1261 | @curr_origin = _assign_rank( $topo_graph, $node_ranks, @curr_origin ); |
910a0a6d |
1262 | } |
1263 | # Transfer our rankings from the topological graph to the real one. |
1264 | foreach my $r ( $self->readings ) { |
3a2ebbf4 |
1265 | if( defined $node_ranks->{$rel_containers{$r->id}} ) { |
1266 | $r->rank( $node_ranks->{$rel_containers{$r->id}} ); |
67da8d6c |
1267 | } else { |
63778331 |
1268 | # Die. Find the last rank we calculated. |
1269 | my @all_defined = sort { $node_ranks->{$rel_containers{$a->id}} |
1270 | <=> $node_ranks->{$rel_containers{$b->id}} } |
1271 | $self->readings; |
1272 | my $last = pop @all_defined; |
1273 | throw( "Ranks not calculated after $last - do you have a cycle in the graph?" ); |
67da8d6c |
1274 | } |
de51424a |
1275 | } |
8e1394aa |
1276 | } |
3a1f2523 |
1277 | |
910a0a6d |
1278 | sub _assign_rank { |
c9bf3dbf |
1279 | my( $graph, $node_ranks, @current_nodes ) = @_; |
910a0a6d |
1280 | # Look at each of the children of @current_nodes. If all the child's |
1281 | # parents have a rank, assign it the highest rank + 1 and add it to |
c9bf3dbf |
1282 | # @next_nodes. Otherwise skip it; we will return when the highest-ranked |
1283 | # parent gets a rank. |
910a0a6d |
1284 | my @next_nodes; |
1285 | foreach my $c ( @current_nodes ) { |
c9bf3dbf |
1286 | warn "Current reading $c has no rank!" |
1287 | unless exists $node_ranks->{$c}; |
1288 | # print STDERR "Looking at child of node $c, rank " |
1289 | # . $node_ranks->{$c} . "\n"; |
1290 | foreach my $child ( $graph->successors( $c ) ) { |
1291 | next if exists $node_ranks->{$child}; |
910a0a6d |
1292 | my $highest_rank = -1; |
1293 | my $skip = 0; |
c9bf3dbf |
1294 | foreach my $parent ( $graph->predecessors( $child ) ) { |
1295 | if( exists $node_ranks->{$parent} ) { |
1296 | $highest_rank = $node_ranks->{$parent} |
1297 | if $highest_rank <= $node_ranks->{$parent}; |
910a0a6d |
1298 | } else { |
1299 | $skip = 1; |
1300 | last; |
1301 | } |
1302 | } |
1303 | next if $skip; |
c9bf3dbf |
1304 | my $c_rank = $highest_rank + 1; |
1305 | # print STDERR "Assigning rank $c_rank to node $child \n"; |
1306 | $node_ranks->{$child} = $c_rank; |
910a0a6d |
1307 | push( @next_nodes, $child ); |
1308 | } |
1309 | } |
1310 | return @next_nodes; |
4cdd82f1 |
1311 | } |
910a0a6d |
1312 | |
4e5a7b2c |
1313 | =head2 flatten_ranks |
1314 | |
1315 | A convenience method for parsing collation data. Searches the graph for readings |
1316 | with the same text at the same rank, and merges any that are found. |
1317 | |
1318 | =cut |
1319 | |
0e476982 |
1320 | sub flatten_ranks { |
1321 | my $self = shift; |
1322 | my %unique_rank_rdg; |
1323 | foreach my $rdg ( $self->readings ) { |
1324 | next unless $rdg->has_rank; |
1325 | my $key = $rdg->rank . "||" . $rdg->text; |
1326 | if( exists $unique_rank_rdg{$key} ) { |
1327 | # Combine! |
56eefa04 |
1328 | # print STDERR "Combining readings at same rank: $key\n"; |
0e476982 |
1329 | $self->merge_readings( $unique_rank_rdg{$key}, $rdg ); |
0ecb975c |
1330 | # TODO see if this now makes a common point. |
0e476982 |
1331 | } else { |
1332 | $unique_rank_rdg{$key} = $rdg; |
1333 | } |
1334 | } |
1335 | } |
1336 | |
4633f9e4 |
1337 | =head2 remove_collations |
1338 | |
1339 | Another convenience method for parsing. Removes all 'collation' relationships |
1340 | that were defined in order to get the reading ranks to be correct. |
1341 | |
1342 | =begin testing |
1343 | |
1344 | use Text::Tradition; |
1345 | |
1346 | my $cxfile = 't/data/Collatex-16.xml'; |
1347 | my $t = Text::Tradition->new( |
1348 | 'name' => 'inline', |
1349 | 'input' => 'CollateX', |
1350 | 'file' => $cxfile, |
1351 | ); |
1352 | my $c = $t->collation; |
1353 | |
1354 | isnt( $c->reading('n23')->rank, $c->reading('n9')->rank, "Rank skew exists" ); |
1355 | $c->add_relationship( 'n23', 'n9', { 'type' => 'collated', 'scope' => 'local' } ); |
1356 | is( scalar $c->relationships, 4, "Found all expected relationships" ); |
1357 | $c->remove_collations; |
1358 | is( scalar $c->relationships, 3, "Collated relationships now gone" ); |
1359 | is( $c->reading('n23')->rank, $c->reading('n9')->rank, "Aligned ranks were preserved" ); |
1360 | |
1361 | =end testing |
1362 | |
1363 | =cut |
1364 | |
1365 | sub remove_collations { |
1366 | my $self = shift; |
1367 | foreach my $reledge ( $self->relationships ) { |
1368 | my $relobj = $self->relations->get_relationship( $reledge ); |
1369 | if( $relobj && $relobj->type eq 'collated' ) { |
1370 | $self->relations->delete_relationship( $reledge ); |
1371 | } |
1372 | } |
1373 | } |
1374 | |
1375 | |
d4b75f44 |
1376 | =head2 calculate_common_readings |
1377 | |
1378 | Goes through the graph identifying the readings that appear in every witness |
1379 | (apart from those with lacunae at that spot.) Marks them as common and returns |
1380 | the list. |
1381 | |
1382 | =begin testing |
1383 | |
1384 | use Text::Tradition; |
1385 | |
1386 | my $cxfile = 't/data/Collatex-16.xml'; |
1387 | my $t = Text::Tradition->new( |
1388 | 'name' => 'inline', |
1389 | 'input' => 'CollateX', |
1390 | 'file' => $cxfile, |
1391 | ); |
1392 | my $c = $t->collation; |
1393 | |
1394 | my @common = $c->calculate_common_readings(); |
1395 | is( scalar @common, 8, "Found correct number of common readings" ); |
1396 | my @marked = sort $c->common_readings(); |
1397 | is( scalar @common, 8, "All common readings got marked as such" ); |
1398 | my @expected = qw/ n1 n12 n16 n19 n20 n5 n6 n7 /; |
1399 | is_deeply( \@marked, \@expected, "Found correct list of common readings" ); |
1400 | |
1401 | =end testing |
1402 | |
1403 | =cut |
1404 | |
1405 | sub calculate_common_readings { |
1406 | my $self = shift; |
1407 | my @common; |
1408 | my $table = $self->make_alignment_table( 1 ); |
1409 | foreach my $idx ( 0 .. $table->{'length'} - 1 ) { |
1410 | my @row = map { $_->{'tokens'}->[$idx]->{'t'} } @{$table->{'alignment'}}; |
1411 | my %hash; |
1412 | foreach my $r ( @row ) { |
1413 | if( $r ) { |
1414 | $hash{$r->id} = $r unless $r->is_meta; |
1415 | } else { |
1416 | $hash{'UNDEF'} = $r; |
1417 | } |
1418 | } |
1419 | if( keys %hash == 1 && !exists $hash{'UNDEF'} ) { |
1420 | my( $r ) = values %hash; |
1421 | $r->is_common( 1 ); |
1422 | push( @common, $r ); |
1423 | } |
1424 | } |
1425 | return @common; |
1426 | } |
1427 | |
861c3e27 |
1428 | =head2 text_from_paths |
1429 | |
1430 | Calculate the text array for all witnesses from the path, for later consistency |
1431 | checking. Only to be used if there is no non-graph-based way to know the |
1432 | original texts. |
1433 | |
1434 | =cut |
1435 | |
1436 | sub text_from_paths { |
1437 | my $self = shift; |
1438 | foreach my $wit ( $self->tradition->witnesses ) { |
1439 | my @text = split( /\s+/, |
1440 | $self->reading_sequence( $self->start, $self->end, $wit->sigil ) ); |
1441 | $wit->text( \@text ); |
1442 | if( $wit->is_layered ) { |
1443 | my @uctext = split( /\s+/, |
1444 | $self->reading_sequence( $self->start, $self->end, |
1445 | $wit->sigil.$self->ac_label ) ); |
1446 | $wit->text( \@uctext ); |
1447 | } |
1448 | } |
1449 | } |
0e476982 |
1450 | |
4e5a7b2c |
1451 | =head1 UTILITY FUNCTIONS |
1452 | |
1453 | =head2 common_predecessor( $reading_a, $reading_b ) |
8e1394aa |
1454 | |
4e5a7b2c |
1455 | Find the last reading that occurs in sequence before both the given readings. |
1456 | |
1457 | =head2 common_successor( $reading_a, $reading_b ) |
1458 | |
1459 | Find the first reading that occurs in sequence after both the given readings. |
1460 | |
22222af9 |
1461 | =begin testing |
1462 | |
1463 | use Text::Tradition; |
1464 | |
1465 | my $cxfile = 't/data/Collatex-16.xml'; |
1466 | my $t = Text::Tradition->new( |
1467 | 'name' => 'inline', |
1468 | 'input' => 'CollateX', |
1469 | 'file' => $cxfile, |
1470 | ); |
1471 | my $c = $t->collation; |
1472 | |
4e5a7b2c |
1473 | is( $c->common_predecessor( 'n9', 'n23' )->id, |
22222af9 |
1474 | 'n20', "Found correct common predecessor" ); |
4e5a7b2c |
1475 | is( $c->common_successor( 'n9', 'n23' )->id, |
22222af9 |
1476 | '#END#', "Found correct common successor" ); |
1477 | |
4e5a7b2c |
1478 | is( $c->common_predecessor( 'n19', 'n17' )->id, |
22222af9 |
1479 | 'n16', "Found correct common predecessor for readings on same path" ); |
4e5a7b2c |
1480 | is( $c->common_successor( 'n21', 'n26' )->id, |
22222af9 |
1481 | '#END#', "Found correct common successor for readings on same path" ); |
1482 | |
1483 | =end testing |
1484 | |
1485 | =cut |
1486 | |
1487 | ## Return the closest reading that is a predecessor of both the given readings. |
1488 | sub common_predecessor { |
1489 | my $self = shift; |
4e5a7b2c |
1490 | my( $r1, $r2 ) = $self->_objectify_args( @_ ); |
027d819c |
1491 | return $self->_common_in_path( $r1, $r2, 'predecessors' ); |
22222af9 |
1492 | } |
1493 | |
1494 | sub common_successor { |
1495 | my $self = shift; |
4e5a7b2c |
1496 | my( $r1, $r2 ) = $self->_objectify_args( @_ ); |
027d819c |
1497 | return $self->_common_in_path( $r1, $r2, 'successors' ); |
22222af9 |
1498 | } |
1499 | |
027d819c |
1500 | sub _common_in_path { |
22222af9 |
1501 | my( $self, $r1, $r2, $dir ) = @_; |
1502 | my $iter = $r1->rank > $r2->rank ? $r1->rank : $r2->rank; |
1503 | $iter = $self->end->rank - $iter if $dir eq 'successors'; |
1504 | my @candidates; |
1505 | my @last_checked = ( $r1, $r2 ); |
1506 | my %all_seen; |
1507 | while( !@candidates ) { |
1508 | my @new_lc; |
1509 | foreach my $lc ( @last_checked ) { |
1510 | foreach my $p ( $lc->$dir ) { |
1511 | if( $all_seen{$p->id} ) { |
1512 | push( @candidates, $p ); |
1513 | } else { |
1514 | $all_seen{$p->id} = 1; |
1515 | push( @new_lc, $p ); |
1516 | } |
1517 | } |
1518 | } |
1519 | @last_checked = @new_lc; |
1520 | } |
1521 | my @answer = sort { $a->rank <=> $b->rank } @candidates; |
1522 | return $dir eq 'predecessors' ? pop( @answer ) : shift ( @answer ); |
1523 | } |
1524 | |
63778331 |
1525 | sub throw { |
1526 | Text::Tradition::Error->throw( |
1527 | 'ident' => 'Collation error', |
1528 | 'message' => $_[0], |
1529 | ); |
1530 | } |
1531 | |
dd3b58b0 |
1532 | no Moose; |
1533 | __PACKAGE__->meta->make_immutable; |
e867486f |
1534 | |
027d819c |
1535 | =head1 LICENSE |
e867486f |
1536 | |
027d819c |
1537 | This package is free software and is provided "as is" without express |
1538 | or implied warranty. You can redistribute it and/or modify it under |
1539 | the same terms as Perl itself. |
e867486f |
1540 | |
027d819c |
1541 | =head1 AUTHOR |
e867486f |
1542 | |
027d819c |
1543 | Tara L Andrews E<lt>aurum@cpan.orgE<gt> |