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package PYX::GraphViz; |
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# Pragmas. |
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use strict; |
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use warnings; |
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# Modules. |
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use Class::Utils qw(set_params); |
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use Error::Pure qw(err); |
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use GraphViz; |
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use PYX::Parser; |
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# Version. |
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our $VERSION = 0.02; |
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# Global variables. |
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use vars qw($num $object $stack); |
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# Constructor. |
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sub new { |
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my ($class, @params) = @_; |
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# Object. |
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my $self = bless {}, $class; |
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# Colors. |
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$self->{'colors'} = { |
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'a' => 'blue', |
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'blockquote' => 'orange', |
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'br' => 'orange', |
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'div' => 'green', |
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'form' => 'yellow', |
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'html' => 'black', |
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'img' => 'violet', |
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'input' => 'yellow', |
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'option' => 'yellow', |
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'p' => 'orange', |
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'select' => 'yellow', |
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'table' => 'red', |
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'td' => 'red', |
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'textarea' => 'yellow', |
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'tr' => 'red', |
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'*' => 'grey', |
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}; |
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# Layout. |
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$self->{'layout'} = 'neato'; |
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# Height and width. |
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$self->{'height'} = 10; |
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$self->{'width'} = 10; |
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# Node height. |
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$self->{'node_height'} = 0.3; |
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# Output handler. |
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$self->{'output_handler'} = \*STDOUT; |
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# Process params. |
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set_params($self, @params); |
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# PYX::Parser object. |
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$self->{'_pyx_parser'} = PYX::Parser->new( |
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'output_handler' => $self->{'output_handler'}, |
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# Handlers. |
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'end_tag' => \&_end_tag, |
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'final' => \&_final, |
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'start_tag' => \&_start_tag, |
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); |
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# Check to '*' color. |
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if (! exists $self->{'colors'}->{'*'}) { |
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err "Bad color define for '*' tags."; |
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} |
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# GraphViz object. |
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$self->{'_graphviz'} = GraphViz->new( |
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'layout' => $self->{'layout'}, |
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'overlap' => 'scale', |
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'height' => $self->{'height'}, |
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'width' => $self->{'width'}, |
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); |
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# Object. |
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$object = $self; |
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# Number iterator. |
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$num = 0; |
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# Stack. |
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$stack = []; |
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# Object. |
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return $self; |
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} |
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# Parse pyx text or array of pyx text. |
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sub parse { |
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my ($self, $pyx, $out) = @_; |
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$self->{'_pyx_parser'}->parse($pyx, $out); |
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return; |
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} |
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# Parse file with pyx text. |
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sub parse_file { |
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my ($self, $file, $out) = @_; |
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$self->{'_pyx_parser'}->parse_file($file, $out); |
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return; |
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} |
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# Parse from handler. |
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sub parse_handler { |
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my ($self, $input_file_handler, $out) = @_; |
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$self->{'_pyx_parser'}->parse_handler($input_file_handler, $out); |
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return; |
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} |
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# Process tag. |
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sub _start_tag { |
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my ($pyx_parser_obj, $tag) = @_; |
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$num++; |
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my $color; |
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if (exists $object->{'colors'}->{$tag}) { |
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$color = $object->{'colors'}->{$tag}; |
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} else { |
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$color = $object->{'colors'}->{'*'}; |
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} |
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$object->{'_graphviz'}->add_node($num, |
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'color' => $color, |
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'height' => $object->{'node_height'}, |
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'shape' => 'point' |
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); |
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if (@{$stack}) { |
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$object->{'_graphviz'}->add_edge( |
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$num => $stack->[-1]->[1], |
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'arrowhead' => 'none', |
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'weight' => 2, |
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); |
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} |
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push @{$stack}, [$tag, $num]; |
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return; |
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} |
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# Process tag. |
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sub _end_tag { |
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my ($pyx_parser_obj, $tag) = @_; |
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if ($stack->[-1]->[0] eq $tag) { |
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pop @{$stack}; |
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} |
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return; |
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} |
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# Final. |
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sub _final { |
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my $pyx_parser_obj = shift; |
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my $out = $pyx_parser_obj->{'output_handler'}; |
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$object->{'_graphviz'}->as_png($out); |
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return; |
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} |
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1; |
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__END__ |