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# Copyright (C) 2012 Patrick "P. J." McDermott
#
# 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 3 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, see <http://www.gnu.org/licenses/>.
use strict;
use warnings;
use MarkdownBook::Section;
use Carp;
package MarkdownBook::Document;
sub new
{
my ($class, $book, $type, $file, $id, $title) = @_;
my $self;
$class = ref($class) || $class;
$self = {};
bless($self, $class);
$self->{'book'} = $book;
$self->{'type'} = $type;
$self->{'file'} = $file;
$self->{'id'} = $id;
$self->{'title'} = $title;
return $self;
}
sub book
{
my ($self, $book) = @_;
my $old = $self->{'book'};
$self->{'book'} = $book if defined($book);
return $old;
}
sub type
{
my ($self, $type) = @_;
my $old = $self->{'type'};
$self->{'type'} = $type if defined($type);
return $old;
}
sub file
{
my ($self, $file) = @_;
my $old = $self->{'file'};
$self->{'file'} = $file if defined($file);
return $old;
}
sub file_path
{
my ($self) = @_;
return $self->{'book'}->dir() . '/' . $self->{'file'};
}
sub id
{
my ($self) = @_;
return $self->{'id'};
}
sub title
{
my ($self, $title) = @_;
my $old = $self->{'title'};
$self->{'title'} = $title if defined($title);
return $old;
}
sub full_title
{
my ($self) = @_;
if ($self->{'type'} eq 'chapter') {
return sprintf('Chapter %d - %s', $self->{'id'}, $self->{'title'});
} elsif ($self->{'type'} eq 'appendix') {
return sprintf('Appendix %s - %s', $self->{'id'}, $self->{'title'});
} else {
return undef;
}
}
sub prev
{
my ($self, $other) = @_;
my $old = $self->{'prev'};
$self->{'prev'} = $other if defined($other);
return $old;
}
sub next
{
my ($self, $other) = @_;
my $old = $self->{'next'};
$self->{'next'} = $other if defined($other);
return $old;
}
sub sections
{
my ($self) = @_;
# FIXME: Why is this necessary?!
foreach my $sec (@{$self->{'sections'}}) {
}
return $self->{'sections'};
}
sub parse
{
my ($self) = @_;
my $source_fh;
my $source_text;
open($source_fh, '<',
$self->{'book'}->dir() . '/' . $self->{'file'} . '.mdwn')
or Carp::croak('Cannot open "' . $self->{'file'} . '" source document');
$source_text = join('', <$source_fh>);
close($source_fh);
# Parse headings of non-index documents.
if ($self->{'type'} ne 'index') {
$self->{'section_level_numbers'} = [0, 0];
$self->{'section_level'} = -1;
$source_text =~ s/
^
(.+) # Heading text
[ \t]* # Optional trailing whitespace
\n # Line break
(=+|-+) # Underline
[ \t]* # Optional trailing whitespace
$
/$self->_do_heading($1, $2)/mexg;
}
# Store parsed text.
$self->{'source_text'} = $source_text;
}
sub _do_heading
{
my ($self, $text, $underline) = @_;
my $level;
my $levels;
my $section_number;
my $section_title;
my $section_id;
my $section;
# Shorten underline to one character.
$underline =~ s/^([=-]).*$/$1/;
# Detect heading level.
if ($underline eq '=') {
$level = 1;
} else {
$level = 2;
}
# Calculate section number.
$levels = $#{$self->{'section_level_numbers'}};
if ($level != $self->{'section_level'}) {
foreach (@{$self->{'section_level_numbers'}}[$level .. $levels]) {
$_ = 0;
}
}
$self->{'section_level'} = $level;
++${$self->{'section_level_numbers'}}[$level - 1];
$section_number = join('.', @{$self->{'section_level_numbers'}});
# Add document ID to section number.
$section_number = $self->{'id'} . '.' . $section_number;
# Trim off unused subsection parts.
$section_number =~ s/(?:\.0)*$//;
# Parse out section title.
$section_title = $text;
$section_title =~ s/
^
([^\[]+) # Section title
[ \t]+ # Whitespace
\[ # Left square bracket
[^\]]+ # Section ID
\] # Right square bracket
$
/$1/x;
# Parse out section ID.
$section_id = $text;
$section_id =~ s/
^
[^\[\]]+ # Section title
[ \t]+ # Whitespace
\[ # Left square bracket
([^\]]+) # Section ID
\] # Right square bracket
$
/$1/x;
# Create and store section object.
$section = MarkdownBook::Section->new($self,
$level, $section_number, $section_id, $section_title);
push(@{$self->{'sections'}}, $section);
$self->{'book'}->add_section($section);
# Prepend number to section title.
$text = $section_number . ' ' . $section_title;
# Return underlined section title.
return $text . "\n" . $underline x length($text);
}
1;
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