# -*- Mode: perl; tab-width: 4; indent-tabs-mode: nil; -*-
#
# Hixie's Structured Text Pretty Printer: Main Code
#
# Copyright (c) 2002 by Ian Hickson
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

package Main;
use strict;
use vars qw(@ISA);
use PLIF::Service;
@ISA = qw(PLIF::Service);
1;

sub provides {
    my $class = shift;
    my($service) = @_;
    return ($service eq 'dispatcher.output.generic' or 
            $service eq 'dispatcher.commands' or
            $service eq 'component.structuredText' or
            $class->SUPER::provides($service));
}

sub cmdStructuredTextProcessor {
    my $self = shift;
    my($app) = @_;
    my $blocks = [];
    my $lastBlock = {
        'level' => 'start',
    };
    $line = 1;
    # pull the data into blocks
    while (<main::DATA>) { # XXX hardcoded to look at main::DATA
        chomp;
        my($quotes, $text) = $self->preanalyseLine($_);
        if ($text eq '') {
            # new line
            $lastBlock = {
                'level' => 'newline',
            };
        } elsif ($quotes eq $lastBlock->{'level'}) {
            # continuation
            push(@{$lastBlock->{'text'}}, $text);
        } else {
            # new block
            $lastBlock = {
                'line' => $line,
                'level' => $quotes,
                'text' => [$text],
            };
            push(@{$blocks}, $lastBlock);
        }
        ++$line;
    }
    # process each block
    my $processors = $app->getSelectingServiceList('structuredText.node');
    foreach my $block (@$blocks) {
        $block = $processors->search($block);
    }
    $app->output->structuredText($blocks);
}

sub preanalyseLine {
    my $self = shift;
    my($text) = @_;
    my $quotes;
    if ($text =~ s/^([>|#:]+) //o) {
        # this line is quoted
        $quotes = $1;
    } else {
        $quotes = '';
    }
    return ($quotes, $text);
}
