From: Tara L Andrews <tla\@mit.edu>
Date: Sat, 7 Apr 2012 23:55:48 +0000 (+0200)
Subject: add rudimentary logic for text segmentation in lemmatizer
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=13aa153c0992277c0f96ec5acf0ef42f825c207b;p=scpubgit%2Fstemmaweb.git

add rudimentary logic for text segmentation in lemmatizer
---

diff --git a/lib/stemmaweb/Controller/Relation.pm b/lib/stemmaweb/Controller/Relation.pm
index cd67f6a..2671473 100644
--- a/lib/stemmaweb/Controller/Relation.pm
+++ b/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
diff --git a/root/css/relationship.css b/root/css/relationship.css
index bed28ee..ef19de0 100644
--- a/root/css/relationship.css
+++ b/root/css/relationship.css
@@ -32,6 +32,10 @@ body {
 	height: 55px;
 	padding-top: 40px;
 }
+.segment_guide {
+	padding-left: 30px;
+	padding-right: 30px;
+}
 h1.title a:link, h1.title a:visited, h1.title a:active {
 	color: #666;
 	font-weight: bold;
diff --git a/root/js/relationship.js b/root/js/relationship.js
index 7921b1d..d569c16 100644
--- a/root/js/relationship.js
+++ b/root/js/relationship.js
@@ -1,8 +1,13 @@
 function getTextPath() {
     var currpath = window.location.pathname
+    // Get rid of trailing slash
     if( currpath.lastIndexOf('/') == currpath.length - 1 ) { 
     	currpath = currpath.slice( 0, currpath.length - 1) 
     };
+    // Get rid of query parameters
+    if( currpath.lastIndexOf('?') != -1 ) {
+    	currpath = currpath.slice( 0, currpath.lastIndexOf('?') );
+    };
     var path_elements = currpath.split('/');
     var textid = path_elements.pop();
     var basepath = path_elements.join( '/' );
@@ -50,7 +55,7 @@ function svgEnlargementLoaded() {
     var transform = 'rotate(0) scale(' + scale + ') translate(4 ' + translate + ')';
     svg_g.setAttribute('transform', transform);
     //used to calculate min and max zoom level:
-    start_element_height = $("#svgenlargement .node title:contains('#START#')").siblings('ellipse')[0].getBBox().height;
+    start_element_height = $("#svgenlargement .node title:contains('START#')").siblings('ellipse')[0].getBBox().height;
     add_relations( function() { $('#loading_overlay').hide(); });
 }
 
@@ -63,7 +68,9 @@ function add_relations( callback_fn ) {
         function(data) {
             $.each(data, function( index, rel_info ) {
                 var type_index = $.inArray(rel_info.type, rel_types);
-                if( type_index != -1 ) {
+                var source_found = get_ellipse( rel_info.source );
+                var target_found = get_ellipse( rel_info.target );
+                if( type_index != -1 && source_found.size() && target_found.size() ) {
                     var relation = relation_manager.create( rel_info.source, rel_info.target, type_index );
                     relation.data( 'type', rel_info.type );
                     relation.data( 'scope', rel_info.scope );
diff --git a/root/src/relate.tt b/root/src/relate.tt
index 89ca08c..87e311c 100644
--- a/root/src/relate.tt
+++ b/root/src/relate.tt
@@ -16,6 +16,13 @@ $(function() {
 		</div>
 		<h1>Relationship mapper</h1>
 		<h2>[% text_title %]</h2>
+		<div id="segmentation">
+[% FOREACH segment IN textsegments -%]
+			<a href="[% c.uri_for( "/relation/$textid" ) %]?start=[% segment.start %]">
+				<span class="segment_guide">[% segment.start %] – [% segment.end %]</span>
+			</a>
+[% END -%]
+		</div>
 	</div>
 
 	<div id="enlargement_container">