add rudimentary logic for text segmentation in lemmatizer

[scpubgit/stemmatology.git] / stemmaweb / lib / stemmaweb / Controller / Relation.pm

diff --git a/stemmaweb/lib/stemmaweb/Controller/Relation.pm b/stemmaweb/lib/stemmaweb/Controller/Relation.pm
index cd67f6a..2671473 100644 (file)
--- a/stemmaweb/lib/stemmaweb/Controller/Relation.pm
+++ b/stemmaweb/lib/stemmaweb/Controller/Relation.pm
@@ -69,33 +69,66 @@ sub definitions :Local :Args(0) {
 
 sub text :Chained('/') :PathPart('relation') :CaptureArgs(1) {
        my( $self, $c, $textid ) = @_;
-       $c->stash->{'tradition'} = $c->model('Directory')->tradition( $textid );
+       # If the tradition has more than 500 ranks or so, split it up.
+       my $tradition = $c->model('Directory')->tradition( $textid );
+       my $length = $tradition->collation->end->rank;
+       if( $length > 700 ) {
+               # Segment the tradition in order not to overload the browser.
+               # Split it up into units of 500 ranks, but have each segment show
+               # 550 ranks so that overlap works.
+               my @divs;
+               my $r = 0;
+               while( $r + 50 < $length ) {
+                       push( @divs, $r );
+                       $r += 500;
+               }
+               $c->stash->{'textsegments'} = [];
+               foreach my $start ( @divs ) {
+                       my $seg = { 'start' => $start };
+                       $seg->{'end'} = $start + 550 > $length ? $length : $start + 550;
+                       push( @{$c->stash->{'textsegments'}}, $seg );
+               }
+       }
+       $c->stash->{'textid'} = $textid;
+       $c->stash->{'tradition'} = $tradition;
 }
 
 sub main :Chained('text') :PathPart('') :Args(0) {
        my( $self, $c ) = @_;
+       my $startseg = $c->req->param('start');
        my $tradition = delete $c->stash->{'tradition'};
        my $collation = $tradition->collation;
-       my $svg_str = $collation->as_svg;
+       my $svgopts;
+       if( $startseg ) {
+               # Only render the subgraph from startseg to +500 or end,
+               # whichever is less.
+               $svgopts = { 'from' => $startseg };
+               $svgopts->{'to'} = $startseg + 550
+                       if $startseg + 550 < $collation->end->rank;
+       } elsif( exists $c->stash->{'textsegments'} ) {
+               # This is the unqualified load of a long tradition. We implicitly start 
+               # at zero, but go only as far as 550.
+               $svgopts = { 'to' => 550 };
+       }
+       my $svg_str = $collation->as_svg( $svgopts );
        $svg_str =~ s/\n//gs;
        $c->stash->{'svg_string'} = $svg_str;
        $c->stash->{'text_title'} = $tradition->name;
        $c->stash->{'template'} = 'relate.tt';
-
 }
 
 =head2 relationships
 
- GET $textid/relationships
+ GET relation/$textid/relationships
 
 Returns the list of relationships defined for this text.
 
- POST $textid/relationships { request }
+ POST relation/$textid/relationships { request }
  
 Attempts to define the requested relationship within the text. Returns 200 on
 success or 403 on error.
 
- DELETE $textid/relationships { request }
+ DELETE relation/$textid/relationships { request }
  
 
 =cut