From e6106e4bfd22aa448fd972150e6bcc39e9fbcb45 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Mon, 13 Aug 2012 14:23:54 -0400
Subject: Split scripts directory into bin and lib.

---
(limited to 'lib/MarkdownBook/Document.pm')

diff --git a/lib/MarkdownBook/Document.pm b/lib/MarkdownBook/Document.pm
new file mode 100644
index 0000000..2a30396
--- /dev/null
+++ b/lib/MarkdownBook/Document.pm
@@ -0,0 +1,245 @@
+# 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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