1 package Text::Tradition::Collation::Reading;
4 use overload '""' => \&_stringify, 'fallback' => 1;
8 Text::Tradition::Collation::Reading - represents a reading (usually a word) in a collation.
12 Text::Tradition is a library for representation and analysis of collated
13 texts, particularly medieval ones. A 'reading' refers to a unit of text,
14 usually a word, that appears in one or more witnesses (manuscripts) of the
15 tradition; the text of a given witness is composed of a set of readings in
22 Creates a new reading in the given collation with the given attributes.
27 =item collation - The Text::Tradition::Collation object to which this reading belongs. Required.
29 =item id - A unique identifier for this reading. Required.
31 =item text - The word or other text of the reading.
33 =item is_start - The reading is the starting point for the collation.
35 =item is_end - The reading is the ending point for the collation.
37 =item is_lacuna - The 'reading' represents a known gap in the text.
39 =item is_ph - A temporary placeholder for apparatus parsing purposes. Do not use unless you know what you are doing.
41 =item rank - The sequence number of the reading. This should probably not be set manually.
45 One of 'text', 'is_start', 'is_end', or 'is_lacuna' is required.
61 Accessor methods for the given attributes.
67 isa => 'Text::Tradition::Collation',
82 writer => 'alter_text',
112 predicate => 'has_rank',
116 around BUILDARGS => sub {
126 # If one of our special booleans is set, we change the text and the
129 if( exists $args->{'is_lacuna'} && !exists $args->{'text'} ) {
130 $args->{'text'} = sprintf( "#LACUNA_%s#", $args->{'id'} );
131 } elsif( exists $args->{'is_start'} ) {
132 $args->{'id'} = '#START#'; # Change the ID to ensure we have only one
133 $args->{'text'} = '#START#';
135 } elsif( exists $args->{'is_end'} ) {
136 $args->{'id'} = '#END#'; # Change the ID to ensure we have only one
137 $args->{'text'} = '#END#';
138 } elsif( exists $args->{'is_ph'} ) {
139 $args->{'text'} = $args->{'id'};
142 $class->$orig( $args );
147 A meta attribute (ha ha), which should be true if any of our 'special'
148 booleans are true. Implies that the reading does not represent a bit
149 of text found in a witness.
155 return $self->is_start || $self->is_end || $self->is_lacuna || $self->is_ph;
158 # Some syntactic sugar
159 sub related_readings {
161 return $self->collation->related_readings( $self, @_ );
166 my @pred = $self->collation->sequence->predecessors( $self->id );
167 return map { $self->collation->reading( $_ ) } @pred;
172 my @succ = $self->collation->sequence->successors( $self->id );
173 return map { $self->collation->reading( $_ ) } @succ;
177 my( $self, $other ) = @_;
178 return $self->collation->add_relationship( $self, $other,
179 { 'type' => 'transposition' } );
188 __PACKAGE__->meta->make_immutable;