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#!/usr/bin/perl 

eval 'exec /usr/bin/perl  -S $0 ${1+"$@"}'
    if 0; # not running under some shell

use strict;
use warnings;

use LaTeX::Table;
use Carp;

use version; our $VERSION = qv('1.0.6');

my $line_id = 0;
my @input;
my $paramline;

while ( my $line = <> ) {
    chomp $line;
    $line =~ s{\s+}{ }xmsg;
    $line =~ s{\A \s* | \s* \z}{}xmsg;

    # remove trailing \\, we do that later
    $line =~ s{\A \\\\ \z}{}xmsg;

    if ( $line_id == 0 ) {    #first line contains the parameters
        $paramline = $line;
    }
    else {
        push @input, $line;
    }
    $line_id++;
}

# remove trailing empty lines
while ( !length $input[-1] ) {
    pop @input;
}

# uncomment original input
_say( join q{}, map {"\n % $_"} ( $paramline, @input ) );

# create rows/column array[array_ref], remove leading and trailing spaces
@input = map {
    [ map { m{\A \s* (.*) \s* \z}xms ? $1 : $_ } split m{ & }xms ]
} @input;

# store the paramline in a hash
my %params = map { _parse_param($_) } split m{ ; }xms, $paramline;

my $table = LaTeX::Table->new(
    {   header => [ $input[0] ],
        data   => [ @input[ 1 .. $#input ] ],
        %params,
    }
);

_say( "\n" . $table->generate_string() );

sub _parse_param {
    my ($s) = @_;
    if ( $s =~ m{ \A (.*?) = (.*) \z}xms ) {
        return $1 => $2;
    }
    else {
        croak q{Invalid parameter line};
    }
    return;
}

sub _say {
    my ($s) = @_;
    print "$s\n" or croak q{Can't print to stdout.};
    return;
}

__END__

=head1 NAME

ltpretty - Use LaTeX::Table from within your text editor.

=head1 SYNOPSIS

  ltpretty < lazytable

=head1 DESCRIPTION

This program takes a I<lazy formatted> LaTeX table from STDIN (typically piped
from Vim or emacs) and outputs a completely formatted table.

=head1 LAZY FORMAT

The first line must contain the L<LaTeX::Table> options (separated by 
semicolons C<;>) in the format C<optionname=value>. The
second line must contain the header, the following lines the data. 
Columns are separated by C<&>. Trailing empty lines are ignored, other 
empty lines generate horizontal rules (as in L<LaTeX::Table>).

=head1 EXAMPLE 

   theme=Meyrin;label=test;position=htb
   Item:2c & Price
   Gnat& per gram& 13.65
   & each& 0.01

   Gnu& stuffed& 92.59
   Emu& stuffed& 33.33
   Armadillo& frozen& 8.99

=head1 VIM

=over 

=item 1. Select the text in C<VISUAL LINE> mode (C<shift+v>). 

=item 2. Type C<!ltpretty>

=back

=head1 EMACS

=over 

=item 1. Select the text

=item 2. Press C<alt+|> 

=item 3. Now "Shell command on region" should appear. Type C<ltpretty>

=back

=head1 OUTPUT

   % theme=Meyrin;label=test;position=htb
   % Item:2c & Price
   % Gnat& per gram& 13.65
   % & each& 0.01
   % 
   % Gnu& stuffed& 92.59
   % Emu& stuffed& 33.33
   % Armadillo& frozen& 8.99
  
  \begin{table}[htb]
  \centering
  \begin{tabular}{llr}
  \toprule
  \multicolumn{2}{c}{Item} & Price \\
  \midrule
  Gnat      & per gram & 13.65 \\
            & each     & 0.01  \\
  \midrule          
  Gnu       & stuffed  & 92.59 \\
  Emu       & stuffed  & 33.33 \\
  Armadillo & frozen   & 8.99  \\
  \bottomrule
  \end{tabular}
  \label{test}
  \end{table}


=head1 CONFIGURATION AND ENVIRONMENT

C<ltpretty> does not support configuration files or environment variables.

=head1 DEPENDENCIES

L<LaTeX::Table> 

=head1 BUGS AND LIMITATIONS

Our I<lazy format> does not support multi-line headers. Just add the other
header lines afterwards. More importantly, it currently does not support 
non-scalar L<LaTeX::Table> options like for example C<columns_like_header>.
A future version may add this functionality.

Please report any bugs or feature requests to
C<bug-latex-table@rt.cpan.org>, or through the web interface at
L<http://rt.cpan.org>. 

=head1 LICENSE AND COPYRIGHT

Copyright (c) 2006-2010, C<< <limaone@cpan.org> >>. 

This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself. See L<perlartistic>.

=head1 DISCLAIMER OF WARRANTY

BECAUSE THIS SOFTWARE IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE SOFTWARE, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE SOFTWARE "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER
EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE
ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE SOFTWARE IS WITH
YOU. SHOULD THE SOFTWARE PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL
NECESSARY SERVICING, REPAIR, OR CORRECTION.

IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE SOFTWARE AS PERMITTED BY THE ABOVE LICENSE, BE
LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE
THE SOFTWARE (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING
RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A
FAILURE OF THE SOFTWARE TO OPERATE WITH ANY OTHER SOFTWARE), EVEN IF
SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.

=cut

# vim: ft=perl sw=4 ts=4 expandtab