/usr/share/perl5/Graph/Easy/Group/Cell.pm is in libgraph-easy-perl 0.76-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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# A cell of a group during layout. Part of Graph::Easy.
#
#############################################################################
package Graph::Easy::Group::Cell;
use Graph::Easy::Node;
@ISA = qw/Graph::Easy::Node/;
$VERSION = '0.76';
use strict;
use warnings;
BEGIN
{
*get_attribute = \&attribute;
}
#############################################################################
# The different types for a group-cell:
use constant {
GROUP_INNER => 0, # completely sourounded by group cells
GROUP_RIGHT => 1, # right border only
GROUP_LEFT => 2, # left border only
GROUP_TOP => 3, # top border only
GROUP_BOTTOM => 4, # bottom border only
GROUP_ALL => 5, # completely sourounded by non-group cells
GROUP_BOTTOM_RIGHT => 6, # bottom and right border
GROUP_BOTTOM_LEFT => 7, # bottom and left border
GROUP_TOP_RIGHT => 8, # top and right border
GROUP_TOP_LEFT => 9, # top and left order
GROUP_MAX => 5, # max number
};
my $border_styles =
{
# type top, bottom, left, right, class
GROUP_INNER() => [ 0, 0, 0, 0, ['gi'] ],
GROUP_RIGHT() => [ 0, 0, 0, 1, ['gr'] ],
GROUP_LEFT() => [ 0, 0, 1, 0, ['gl'] ],
GROUP_TOP() => [ 1, 0, 0, 0, ['gt'] ],
GROUP_BOTTOM() => [ 0, 1, 0, 0, ['gb'] ],
GROUP_ALL() => [ 0, 0, 0, 0, ['ga'] ],
GROUP_BOTTOM_RIGHT() => [ 0, 1, 0, 1, ['gb','gr'] ],
GROUP_BOTTOM_LEFT() => [ 0, 1, 1, 0, ['gb','gl'] ],
GROUP_TOP_RIGHT() => [ 1, 0, 0, 1, ['gt','gr'] ],
GROUP_TOP_LEFT() => [ 1, 0, 1, 0, ['gt','gl'] ],
};
my $border_name = [ 'top', 'bottom', 'left', 'right' ];
sub _css
{
my ($c, $id, $group, $border) = @_;
my $css = '';
for my $type (0 .. 5)
{
my $b = $border_styles->{$type};
# If border eq 'none', this would needlessly repeat the "border: none"
# from the general group class.
next if $border eq 'none';
my $cl = '.' . $b->[4]->[0]; # $cl .= "-$group" unless $group eq '';
$css .= "table.graph$id $cl {";
if ($type == GROUP_INNER)
{
$css .= " border: none;"; # shorter CSS
}
elsif ($type == GROUP_ALL)
{
$css .= " border-style: $border;"; # shorter CSS
}
else
{
for (my $i = 0; $i < 4; $i++)
{
$css .= ' border-' . $border_name->[$i] . "-style: $border;" if $b->[$i];
}
}
$css .= "}\n";
}
$css;
}
#############################################################################
sub _init
{
# generic init, override in subclasses
my ($self,$args) = @_;
$self->{class} = 'group';
$self->{cell_class} = ' gi';
$self->{name} = '';
$self->{'x'} = 0;
$self->{'y'} = 0;
# XXX TODO check arguments
foreach my $k (sort keys %$args)
{
$self->{$k} = $args->{$k};
}
if (defined $self->{group})
{
# register ourselves at this group
$self->{group}->_add_cell ($self);
# XXX CHECK also implement sub_class()
$self->{class} = $self->{group}->{class};
$self->{class} = 'group' unless defined $self->{class};
}
$self;
}
sub _set_type
{
# set the proper type of this cell based on the sourrounding cells
my ($self, $cells) = @_;
# +------+--------+-------+
# | LT TOP RU |
# + + + +
# | LEFT INNER Right |
# + + + +
# | LB BOTTOM RB |
# +------+--------+-------+
my @coord = (
[ 0, -1, ' gt' ],
[ +1, 0, ' gr' ],
[ 0, +1, ' gb' ],
[ -1, 0, ' gl' ],
);
my ($sx,$sy) = ($self->{x},$self->{y});
my $class = '';
my $gr = $self->{group};
foreach my $co (@coord)
{
my ($x,$y,$c) = @$co; $x += $sx; $y += $sy;
my $cell = $cells->{"$x,$y"};
# belongs to the same group?
my $go = 0; $go = $cell->group() if UNIVERSAL::can($cell, 'group');
$class .= $c unless defined $go && $gr == $go;
}
$class = ' ga' if $class eq ' gt gr gb gl';
$self->{cell_class} = $class;
$self;
}
sub _set_label
{
my $self = shift;
$self->{has_label} = 1;
$self->{name} = $self->{group}->label();
}
sub shape
{
'rect';
}
sub attribute
{
my ($self, $name) = @_;
# print STDERR "called attribute($name)\n";
# return $self->{group}->attribute($name);
my $group = $self->{group};
return $group->{att}->{$name} if exists $group->{att}->{$name};
$group->{cache} = {} unless exists $group->{cache};
$group->{cache}->{att} = {} unless exists $group->{cache}->{att};
my $cache = $group->{cache}->{att};
return $cache->{$name} if exists $cache->{$name};
$cache->{$name} = $group->attribute($name);
}
use constant isa_cell => 1;
#############################################################################
# conversion to ASCII or HTML
sub as_ascii
{
my ($self, $x,$y) = @_;
my $fb = $self->_framebuffer($self->{w}, $self->{h});
my $border_style = $self->attribute('borderstyle');
my $EM = 14;
# use $self here and not $self->{group} to engage attribute cache:
my $border_width = Graph::Easy::_border_width_in_pixels($self,$EM);
# convert overly broad borders to the correct style
$border_style = 'bold' if $border_width > 2;
$border_style = 'broad' if $border_width > $EM * 0.2 && $border_width < $EM * 0.75;
$border_style = 'wide' if $border_width >= $EM * 0.75;
if ($border_style ne 'none')
{
#########################################################################
# draw our border into the framebuffer
my $c = $self->{cell_class};
my $b_top = $border_style;
my $b_left = $border_style;
my $b_right = $border_style;
my $b_bottom = $border_style;
if ($c !~ 'ga')
{
$b_top = 'none' unless $c =~ /gt/;
$b_left = 'none' unless $c =~ /gl/;
$b_right = 'none' unless $c =~ /gr/;
$b_bottom = 'none' unless $c =~ /gb/;
}
$self->_draw_border($fb, $b_right, $b_bottom, $b_left, $b_top, $x, $y);
}
if ($self->{has_label})
{
# include our label
my $align = $self->attribute('align');
# the default label cell as a top border, but no left/right border
my $ys = 0.5;
$ys = 0 if $border_style eq 'none';
my $h = $self->{h} - 1; $h ++ if $border_style eq 'none';
$self->_printfb_aligned ($fb, 0, $ys, $self->{w}, $h,
$self->_aligned_label($align), 'middle');
}
join ("\n", @$fb);
}
sub class
{
my $self = shift;
$self->{class} . $self->{cell_class};
}
#############################################################################
# for rendering this cell as ASCII/Boxart, we need to correct our width based
# on whether we have a border or not. But this is only known after parsing is
# complete.
sub _correct_size
{
my ($self,$format) = @_;
if (!defined $self->{w})
{
my $border = $self->attribute('borderstyle');
$self->{w} = 0;
$self->{h} = 0;
# label needs space
$self->{h} = 1 if $self->{has_label};
if ($border ne 'none')
{
# class "gt", "gb", "gr" or "gr" will be compressed away
# (e.g. only edge cells will be existent)
if ($self->{has_label} || ($self->{cell_class} =~ /g[rltb] /))
{
$self->{w} = 2;
$self->{h} = 2;
}
elsif ($self->{cell_class} =~ /^ g[rl]\z/)
{
$self->{w} = 2;
}
elsif ($self->{cell_class} =~ /^ g[bt]\z/)
{
$self->{h} = 2;
}
}
}
if ($self->{has_label})
{
my ($w,$h) = $self->dimensions();
$self->{h} += $h;
$self->{w} += $w;
}
}
1;
__END__
=head1 NAME
Graph::Easy::Group::Cell - A cell in a group
=head1 SYNOPSIS
use Graph::Easy;
my $ssl = Graph::Easy::Edge->new( );
$ssl->set_attributes(
label => 'encrypted connection',
style => '-->',
color => 'red',
);
$graph = Graph::Easy->new();
$graph->add_edge('source', 'destination', $ssl);
print $graph->as_ascii();
=head1 DESCRIPTION
A C<Graph::Easy::Group::Cell> represents a cell of a group.
Group cells can have a background and, if they are on the outside, a border.
There should be no need to use this package directly.
=head1 METHODS
=head2 error()
$last_error = $group->error();
$group->error($error); # set new messages
$group->error(''); # clear error
Returns the last error message, or '' for no error.
=head2 as_ascii()
my $ascii = $cell->as_ascii();
Returns the cell as a little ascii representation.
=head2 as_html()
my $html = $cell->as_html($tag,$id);
Returns the cell as HTML code.
=head2 label()
my $label = $cell->label();
Returns the name (also known as 'label') of the cell.
=head2 class()
my $class = $cell->class();
Returns the classname(s) of this cell, like:
group_cities gr gb
for a cell with a bottom (gb) and right (gr) border in the class C<cities>.
=head1 EXPORT
None.
=head1 SEE ALSO
L<Graph::Easy>.
=head1 AUTHOR
Copyright (C) 2004 - 2007 by Tels L<http://bloodgate.com>.
See the LICENSE file for more details.
=cut
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