provide for stemma graphic display

diff --git a/group_vars.pl b/group_vars.pl
index 5ffeefd..3302b1a 100644 (file)
--- a/group_vars.pl
+++ b/group_vars.pl
@@ -27,7 +27,7 @@ $input = join( '', @lines );
 my %args = ( $informat => $input,
              'linear' => $linear );
 $args{'base'} = $inbase if $inbase;
- my $tradition = Text::Tradition->new( %args );
+my $tradition = Text::Tradition->new( %args );
 
 # Parse the stemma hypothesis
 my $stemma = Text::Tradition::Stemma->new( 
@@ -95,6 +95,11 @@ foreach my $i ( 0 .. $#$all_wits_table ) {
     
 }
 print "Found $used_vars useful variants in this analysis\n";
+# Save the stemma picture
+open( STEMMA, ">stemma_graph.svg" ) or die "Could not open stemma graph to write";
+binmode STEMMA, ":utf8";
+print STEMMA $stemma->as_svg;
+close STEMMA;
 
 sub analyze_variant_location {
     my( $group_readings, $groups, $apsp ) = @_;

diff --git a/lib/Text/Tradition/Stemma.pm b/lib/Text/Tradition/Stemma.pm
index a90d863..e04811c 100644 (file)
--- a/lib/Text/Tradition/Stemma.pm
+++ b/lib/Text/Tradition/Stemma.pm
@@ -1,11 +1,13 @@
 package Text::Tradition::Stemma;
 
 use Bio::Phylo::IO;
+use Encode qw( decode_utf8 );
 use File::chdir;
 use File::Temp;
 use Graph;
+use Graph::Convert;
 use Graph::Reader::Dot;
-use IPC::Run qw/ run /;
+use IPC::Run qw/ run binary /;
 use Moose;
 use Text::Balanced qw/ extract_bracketed /;
 
@@ -44,8 +46,12 @@ sub BUILD {
     my( $self, $args ) = @_;
     # If we have been handed a dotfile, initialize it into a graph.
     if( exists $args->{'dot'} ) {
+        # Open the file, assume UTF-8
+        open( my $dot, $args->{'dot'} ) or warn "Failed to read dot file";
+        # TODO don't bother if we haven't opened
+        binmode $dot, ":utf8";
         my $reader = Graph::Reader::Dot->new();
-        my $graph = $reader->read_graph( $args->{'dot'} );
+        my $graph = $reader->read_graph( $dot );
         $graph 
             ? $self->graph( $graph ) 
             : warn "Failed to parse dot file " . $args->{'dot'};
@@ -71,6 +77,38 @@ sub BUILD {
     }
 }
 
+# Render the stemma as SVG.
+sub as_svg {
+    my $self = shift;
+    # TODO add options for display, someday
+    my $dgraph = Graph::Convert->as_graph_easy( $self->graph );
+    # Set some class display attributes for 'hypothetical' and 'extant' nodes
+    $dgraph->set_attribute( 'flow', 'south' );
+    foreach my $n ( $dgraph->nodes ) {
+        if( $n->attribute( 'class' ) eq 'hypothetical' ) {
+            $n->set_attribute( 'shape', 'point' );
+            $n->set_attribute( 'pointshape', 'diamond' );
+        } else {
+            $n->set_attribute( 'shape', 'ellipse' );
+        }
+    }
+    
+    # Render to svg via graphviz
+    my @cmd = qw/dot -Tsvg/;
+    my( $svg, $err );
+    my $dotfile = File::Temp->new();
+    ## TODO REMOVE
+    # $dotfile->unlink_on_destroy(0);
+    binmode $dotfile, ':utf8';
+    print $dotfile $dgraph->as_graphviz();
+    push( @cmd, $dotfile->filename );
+    run( \@cmd, ">", binary(), \$svg );
+    $svg = decode_utf8( $svg );
+    return $svg;
+}
+
+#### Methods for calculating phylogenetic trees ####
+
 before 'distance_trees' => sub {
     my $self = shift;
     my %args = @_;