File Coverage

blib/lib/SVG/Sparkline/Line.pm

Criterion	Covered	Total	%
statement	49	49	100.0
branch	2	2	100.0
condition	2	2	100.0
subroutine	10	10	100.0
pod	2	2	100.0
total	65	65	100.0

package SVG::Sparkline::Line;

use warnings;
use strict;
use Carp;
use SVG;
use SVG::Sparkline::Utils;

use 5.008000;
our $VERSION = 1.10;

# aliases to make calling shorter.
*_f = *SVG::Sparkline::Utils::format_f;

sub valid_param {
    return scalar grep { $_[1] eq $_ } qw/thick xrange yrange/;
}

sub make
{
    my ($class, $args) = @_;
    # validate parameters
    SVG::Sparkline::Utils::validate_array_param( $args, 'values' );
    my $valdesc = SVG::Sparkline::Utils::summarize_xy_values( $args->{values} );

    my $thick = $args->{thick} || 1;
    SVG::Sparkline::Utils::calculate_xscale( $args, $valdesc->{xrange} );
    SVG::Sparkline::Utils::calculate_yscale_and_offset( $args, $valdesc->{yrange}, $valdesc->{offset} );
    my $svg = SVG::Sparkline::Utils::make_svg( $args );

    my $points = SVG::Sparkline::Utils::xypairs_to_points_str(
        $valdesc->{vals}, $args->{xscale}, $args->{yscale}
    );
    $svg->polyline( fill=>'none', 'stroke-width'=>$thick, stroke=>$args->{color}, 'stroke-linecap'=>'round', points=>$points );

    if( exists $args->{mark} )
    {
        _make_marks( $svg,
            thick=>$thick, xscale=>$args->{xscale}, yscale=>$args->{yscale},
            values=>$valdesc->{vals}, mark=>$args->{mark}
        );
    }

    return $svg;
}

sub _make_marks
{
    my ($svg, %args) = @_;

    my @marks = @{$args{mark}};
    my @yvalues = map { $_->[1] } @{$args{values}};
    while(@marks)
    {
        my ($index,$color) = splice( @marks, 0, 2 );
        $index = SVG::Sparkline::Utils::mark_to_index( 'Line', $index, \@yvalues );
        _make_mark( $svg, %args, index=>$index, color=>$color );
    }
    return;
}

sub _make_mark
{
    my ($svg, %args) = @_;
    my $index = $args{index};
    my $x = _f($args{xscale} * $args{values}->[$index]->[0]);
    my $y = _f($args{yscale} * $args{values}->[$index]->[1]);
    $svg->circle( cx=>$x, cy=>$y, r=>$args{thick},
        stroke=>'none', fill=>$args{color}
    );
    return;
}

1;

__END__