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# You may distribute under the terms of either the GNU General Public License
# or the Artistic License (the same terms as Perl itself)
#
# (C) Paul Evans, 2011-2021 -- leonerd@leonerd.org.uk
use v5.26;
use warnings;
use Object::Pad 0.57;
package Tickit::Widget::Scroller::Item::RichText 0.31;
class Tickit::Widget::Scroller::Item::RichText
:strict(params)
:isa(Tickit::Widget::Scroller::Item::Text);
use Tickit::Utils qw( textwidth );
=head1 NAME
C<Tickit::Widget::Scroller::Item::RichText> - static text with render
attributes
=head1 SYNOPSIS
use Tickit::Widget::Scroller;
use Tickit::Widget::Scroller::Item::RichText;
use String::Tagged;
my $str = String::Tagged->new( "An important message" );
$str->apply_tag( 3, 9, b => 1 );
my $scroller = Tickit::Widget::Scroller->new;
$scroller->push(
Tickit::Widget::Scroller::Item::RichText->new( $str )
);
=head1 DESCRIPTION
This subclass of L<Tickit::Widget::Scroller::Item::Text> draws static text
with rendering attributes, used to apply formatting. The attributes are stored
by supplying the text in an instance of a L<String::Tagged> object.
The recognised attributes are those of L<Tickit::Pen>, taking the same names
and values. To use a L<String::Tagged::Formatting> instance instead, use the
L</new_from_formatting> constructor.
=cut
=head1 CONSTRUCTOR
=cut
=head2 new_from_formatting
$item = Tickit::Widget::Scroller::Item::RichText->new_from_formatting( $str, %opts )
Constructs a new item containing the text given by the L<String::Tagged>
instance, converting the tags from the L<String::Tagged::Formatting>
convention into native L<Tickit::Pen> format.
=cut
sub _convert_color_tag ($n, $v)
{
return $n => $v->as_xterm->index;
}
my %convert_tags = (
bold => "b",
under => "u",
italic => "i",
strike => "strike",
blink => "blink",
monospace => sub ($, $v) { "af" => ( $v ? 1 : 0 ) },
reverse => "rv",
fg => \&_convert_color_tag,
bg => \&_convert_color_tag,
);
sub new_from_formatting ( $class, $str, %opts )
{
return $class->new(
# TODO: Maybe this should live somewhere more fundamental in Tickit itself?
$str->clone(
only_tags => [ keys %convert_tags ],
convert_tags => \%convert_tags,
),
%opts
);
}
method _build_chunks_for ( $str )
{
my @chunks;
$str->iter_substr_nooverlap(
sub {
my ( $substr, %tags ) = @_;
my $pen = Tickit::Pen->new_from_attrs( \%tags );
# Don't worry if extra tags left over, they just aren't rendering attributes
my @lines = split m/\n/, $substr, -1 or return;
my $lastline = pop @lines;
push @chunks, [ $_, textwidth( $_ ), pen => $pen, linebreak => 1 ] for @lines;
push @chunks, [ $lastline, textwidth( $lastline ), pen => $pen ];
},
);
return @chunks;
}
=head1 AUTHOR
Paul Evans <leonerd@leonerd.org.uk>
=cut
0x55AA;
|
