File Coverage

blib/lib/App/Greple/frame.pm

Criterion	Covered	Total	%
statement	17	41	41.4
branch	0	20	0.0
condition	0	8	0.0
subroutine	6	13	46.1
pod	1	6	16.6
total	24	88	27.2

package App::Greple::frame;

our $VERSION = "1.00";

=encoding utf-8

=head1 NAME

App::Greple::frame - Greple frame output module

=head1 SYNOPSIS

greple -Mframe --frame ...

=head1 DESCRIPTION

Greple -Mframe module provide a capability to put surrounding frames
for each blocks.

C, C and C frames are printed for blocks.

By default B<--join-blocks> option is enabled to collect consecutive
lines into a single block.  If you don't like this, override it by
B<--no-join-blocks> option.

=head1 OPTIONS

=over 7

=item B<--frame>

=for comment
=item B<--frame-fold>

Set frame and fold long lines with frame-friendly prefix string.
Folding width is taken from the terminal.  Or you can specify the
width by calling B function with module option.

=item B<--set-frame-width>=I<#>

Set frame width.  You have to put this option before B<--frame>
option.  See B function in L section.

=begin comment

=item B<--frame-simple>

Set frame without folding.

=end comment

=item B<--frame-pages>

Output results in multi-column, paginated format to fit the width of the
terminal.

=back

=begin comment

Put next line in your F<~/.greplerc> to autoload B module.

    autoload -Mframe --frame

Then you can use B<--frame> option whenever you want.

=end comment

=begin html



=end html

=head1 FUNCTION

=over 7

=item B(B=I)

Set terminal width to I.  Use like this:

    greple -Mframe::set(width=80) ...

    greple -Mframe::set=width=80 ...

If non-digit character is found in the value part, it is considered as
a Reverse Polish Notation, starting terminal width pushed on the
stack.  RPN C<2/3-> means C.

You can use like this:

    greple -Mframe::set=width=2/3- --frame --uc '(\w+::)+\w+' --git | ansicolumn -PC2

=begin html



=end html

=back

=head1 SEE ALSO

L

L

=head1 AUTHOR

Kazumasa Utashiro

=head1 LICENSE

Copyright 2022-2023 Kazumasa Utashiro.

This library is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

=cut

use 5.014;
use warnings;
use utf8;
use Data::Dumper;

my($mod, $argv);
my($head, $blockend, $file_start, $file_end);

my %param = (
    width  => undef,
    column => undef,
    fold   => '',
);

sub terminal_width {
    use Term::ReadKey;
    my $default = 80;
    my @size;
    if (open my $tty, ">", "/dev/tty") {
	# Term::ReadKey 2.31 on macOS 10.15 has a bug in argument handling
	# and the latest version 2.38 fails to install.
	# This code should work on both versions.
	@size = GetTerminalSize $tty, $tty;
    }
    $size[0] or $default;
}

sub finalize {
    ($mod, $argv) = @_;
}

my %frame_base = (
    top    => '      ┌─' ,
    middle => '    ⋮ ├╶' ,
    bottom => '──────┴─' ,
    );

sub opt_frame {
    my $pos = shift;
    my $width = $param{width} //= terminal_width;
    local $_ = $frame_base{$pos} or die;
    if ((my $rest = $width - length) > 0) {
	$_ .= (substr($_, -1, 1) x $rest);
    }
    $_;
}

my %rpn = (
    width  => { init => sub { terminal_width } },
    column => { init => sub { terminal_width } },
    );
sub rpn {
    my($k, $v) = @_;
    require Getopt::EX::RPN
	and Getopt::EX::RPN->import('rpn_calc');
    my $init = $rpn{$k}->{init} // die;
    my @init = ref $init ? $init->() : $init ? $init : ();
    int(rpn_calc(@init, $v)) or die "$v: format error\n";
}

sub set {
    while (my($k, $v) = splice(@_, 0, 2)) {
	exists $param{$k} or next;
	$v = rpn($k, $v) if $rpn{$k} and $v =~ /\D/;
	$param{$k} = $v;
    }
    ();
}

sub get {
    use List::Util qw(pairmap);
    pairmap { $param{$a} } @_;
}

1;

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