/usr/share/perl5/Graphics/Primitive/Driver/Cairo/TextLayout.pm is in libgraphics-primitive-driver-cairo-perl 0.44-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 | package Graphics::Primitive::Driver::Cairo::TextLayout;
{
$Graphics::Primitive::Driver::Cairo::TextLayout::VERSION = '0.44';
}
use Moose;
# ABSTRCAT: Text layout engine
use Graphics::Primitive::TextBox;
with 'Graphics::Primitive::Driver::TextLayout';
use Text::Flow;
has 'lines' => (
is => 'rw',
isa => 'ArrayRef',
default => sub { [] }
);
sub layout {
my ($self, $driver) = @_;
my $comp = $self->component;
my $font = $comp->font;
my $width = $comp->width ? $comp->width : $comp->minimum_inside_width;
my $text = $comp->text;
unless($self->width) {
$self->width($width);
}
unless(defined($text)) {
$self->height(0);
return;
}
my $size;
my $flow = Text::Flow->new(
check_height => sub {
return 1;
},
wrapper => Text::Flow::Wrap->new(
check_width => sub {
my $str = shift;
my $r = $driver->get_text_bounding_box($comp, $str);
unless($width) {
# Catch the "no width" case.
return 1;
}
if($r->width > $width) {
return 0;
}
return 1;
}
)
);
my @text = $flow->flow($text);
my $p = $text[0];
my @lines = split(/\n/, $p);
my $height = 0;
$width = 0;
foreach my $l (@lines) {
my ($cb, $tb) = $driver->get_text_bounding_box($comp);
push(@{ $self->lines }, {
text => $l,
box => $tb,
cb => $cb
});
$height += $cb->height;
$width += $cb->width;
}
$self->height($height);
if(!defined($self->width) || ($self->width == 0)) {
$self->width($width);
}
}
sub slice {
my ($self, $offset, $size) = @_;
unless(defined($size)) {
$size = $self->height;
}
my $font = $self->component->font;
my $lh = $font->size;
# my $lh = defined($self->line_height)
# ? $self->line_height : $self->font->size;
my @new;
my $accum = 0;
my $found = 0;
for(my $i = 0; $i < scalar(@{ $self->lines }); $i++) {
my $l = $self->lines->[$i];
my $llh = $l->{cb}->height;
# If the 'local' line height is < the overall line height, use the
# overall one.
if($llh < $lh) {
$llh = $lh;
}
if($accum < $offset) {
$accum += $llh;
next;
}
if(($accum + $llh) <= ($offset + $size)) {
push(@new, $l);
$accum += $llh;
$found += $llh;
}
}
return Graphics::Primitive::TextBox->new(
lines => \@new,
minimum_width => $self->width,
minimum_height => $found
);
}
__PACKAGE__->meta->make_immutable;
no Moose;
1;
__END__
=pod
=head1 NAME
Graphics::Primitive::Driver::Cairo::TextLayout - implementation of TextLayout for Cairo
=head1 VERSION
version 0.44
=head1 SYNOPSIS
my $driver = Graphics::Primitive::Driver::Cairo->new(format => 'PDF');
my $comp = Graphics::Primitive::TextBox->new;
my $tl = $driver->get_textbox_layout($comp);
=head1 DESCRIPTION
Implements L<Graphics::Primitive::Driver::TextLayout>. Please refer to it's
documentation for usage.
=head1 IMPLEMENTATION
This text layout engine uses L<Text::Flow> and L<Cairo>'s "toy text" API to
layout text.
=head1 AUTHOR
Cory G Watson <gphat@cpan.org>
=head1 COPYRIGHT AND LICENSE
This software is copyright (c) 2011 by Cold Hard Code, LLC.
This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
=cut
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