From 5f516d09b5f33284c65b75b5c03d5144ed7c6418 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Fri, 10 Aug 2012 12:30:47 -0400
Subject: Factor format-specific code out of modules.

---
diff --git a/scripts/MarkdownBook/Book.pm b/scripts/MarkdownBook/Book.pm
index fd43041..547a4f0 100644
--- a/scripts/MarkdownBook/Book.pm
+++ b/scripts/MarkdownBook/Book.pm
@@ -16,22 +16,18 @@
 use strict;
 use warnings;
 
-use MarkdownBook::Document::Index;
-use MarkdownBook::Document::Chapter;
-use MarkdownBook::Document::Appendix;
-use HTML::Template;
-
 package MarkdownBook::Book;
 
 sub new
 {
-	my ($class, $dir) = @_;
+	my ($class, $format, $dir) = @_;
 	my $self;
 	my $control_fh;
 
 	$class = ref($class) || $class;
 	$self = {};
 	bless($self,$class);
+	$self->{'format'} = $format;
 	$self->{'dir'} = $dir;
 	$self->{'docs'} = [];
 
@@ -68,6 +64,13 @@ sub title
 	return $old;
 }
 
+sub get_document_module
+{
+	my ($self, $mod) = @_;
+
+	return 'MarkdownBook::Document::' . $self->{'format'} . '::' . $mod;
+}
+
 sub create_documents
 {
 	my ($self) = @_;
@@ -80,7 +83,7 @@ sub create_documents
 	my @letters;
 
 	$i = 0;
-	$doc = MarkdownBook::Document::Index->new($self);
+	$doc = $self->get_document_module('Index')->new($self);
 	$doc_prev = $doc;
 	push(@{$self->{'docs'}}, $doc);
 
@@ -88,7 +91,7 @@ sub create_documents
 	while (<$series_fh>) {
 		chomp($_);
 		($file, $title) = split(/[ \t]+/, $_, 2);
-		$doc = MarkdownBook::Document::Chapter->new($self, $file,
+		$doc = $self->get_document_module('Chapter')->new($self, $file,
 			++$i, $title);
 		$doc->prev($doc_prev);
 		$doc_prev->next($doc) if defined $doc_prev;
@@ -105,7 +108,7 @@ sub create_documents
 		while (<$series_fh>) {
 			chomp($_);
 			($file, $title) = split(/[ \t]+/, $_, 2);
-			$doc = MarkdownBook::Document::Appendix->new($self, $file,
+			$doc = $self->get_document_module('Appendix')->new($self, $file,
 				$letters[++$i], $title);
 			$doc->prev($doc_prev);
 			$doc_prev->next($doc) if defined $doc_prev;
@@ -129,65 +132,4 @@ sub list_documents
 	}
 }
 
-sub parse_documents
-{
-	my ($self) = @_;
-	my $doc;
-
-	foreach $doc (@{$self->{'docs'}}) {
-		$doc->parse_html();
-	}
-}
-
-sub number_sections
-{
-	my ($self) = @_;
-	my $doc;
-
-	foreach $doc (@{$self->{'docs'}}) {
-		$doc->number_sections();
-	}
-}
-
-sub write_templated_documents
-{
-	my ($self) = @_;
-	my $doc_tmpl;
-	my $doc;
-	my $doc_fh;
-
-	$doc_tmpl = HTML::Template->new(filename => 'include/document.tmpl');
-
-	foreach $doc (@{$self->{'docs'}}) {
-
-		$doc_tmpl->param(
-			IS_INDEX => (ref($doc) eq 'MarkdownBook::Document::Index'));
-
-		$doc_tmpl->param(BOOK_TITLE => $self->{'title'});
-		$doc_tmpl->param(TITLE => $doc->title());
-		$doc_tmpl->param(CHAPT_TITLE => $doc->full_title());
-
-		if (defined($doc->prev())) {
-			$doc_tmpl->param(PREV_LINK => $doc->prev()->file() . '.html');
-			$doc_tmpl->param(PREV_TITLE => $doc->prev()->title());
-		} else {
-			$doc_tmpl->param(PREV_LINK => undef);
-			$doc_tmpl->param(PREV_TITLE => undef);
-		}
-		if (defined($doc->next())) {
-			$doc_tmpl->param(NEXT_LINK => $doc->next()->file() . '.html');
-			$doc_tmpl->param(NEXT_TITLE => $doc->next()->title());
-		} else {
-			$doc_tmpl->param(NEXT_LINK => undef);
-			$doc_tmpl->param(NEXT_TITLE => undef);
-		}
-
-		$doc_tmpl->param(BODY => $doc->output());
-
-		open($doc_fh, '>', $doc->file_path() . '.html');
-		$doc_tmpl->output(print_to => $doc_fh);
-		close($doc_fh);
-	}
-}
-
 1;
diff --git a/scripts/MarkdownBook/Book/HTML.pm b/scripts/MarkdownBook/Book/HTML.pm
new file mode 100644
index 0000000..67acc34
--- /dev/null
+++ b/scripts/MarkdownBook/Book/HTML.pm
@@ -0,0 +1,103 @@
+# 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::Document::HTML::Index;
+use MarkdownBook::Document::HTML::Chapter;
+use MarkdownBook::Document::HTML::Appendix;
+use HTML::Template;
+
+package MarkdownBook::Book::HTML;
+
+use base qw(MarkdownBook::Book);
+
+sub new
+{
+	my ($class, @args) = @_;
+	my $self;
+
+	$class = ref($class) || $class;
+	$self = {};
+	bless($self,$class);
+
+	$self = $self->SUPER::new('HTML', @args);
+
+	return $self;
+}
+
+sub parse_documents
+{
+	my ($self) = @_;
+	my $doc;
+
+	foreach $doc (@{$self->{'docs'}}) {
+		$doc->parse_html();
+	}
+}
+
+sub number_sections
+{
+	my ($self) = @_;
+	my $doc;
+
+	foreach $doc (@{$self->{'docs'}}) {
+		$doc->number_sections();
+	}
+}
+
+sub write_templated_documents
+{
+	my ($self) = @_;
+	my $doc_tmpl;
+	my $doc;
+	my $doc_fh;
+
+	$doc_tmpl = HTML::Template->new(filename => 'include/document.tmpl');
+
+	foreach $doc (@{$self->{'docs'}}) {
+
+		$doc_tmpl->param(
+			IS_INDEX => (ref($doc) eq $self->get_document_module('Index')));
+
+		$doc_tmpl->param(BOOK_TITLE => $self->{'title'});
+		$doc_tmpl->param(TITLE => $doc->title());
+		$doc_tmpl->param(CHAPT_TITLE => $doc->full_title());
+
+		if (defined($doc->prev())) {
+			$doc_tmpl->param(PREV_LINK => $doc->prev()->file() . '.html');
+			$doc_tmpl->param(PREV_TITLE => $doc->prev()->title());
+		} else {
+			$doc_tmpl->param(PREV_LINK => undef);
+			$doc_tmpl->param(PREV_TITLE => undef);
+		}
+		if (defined($doc->next())) {
+			$doc_tmpl->param(NEXT_LINK => $doc->next()->file() . '.html');
+			$doc_tmpl->param(NEXT_TITLE => $doc->next()->title());
+		} else {
+			$doc_tmpl->param(NEXT_LINK => undef);
+			$doc_tmpl->param(NEXT_TITLE => undef);
+		}
+
+		$doc_tmpl->param(BODY => $doc->output());
+
+		open($doc_fh, '>', $doc->file_path() . '.html');
+		$doc_tmpl->output(print_to => $doc_fh);
+		close($doc_fh);
+	}
+}
+
+1;
diff --git a/scripts/MarkdownBook/Document.pm b/scripts/MarkdownBook/Document.pm
index f9b9a13..249cdf6 100644
--- a/scripts/MarkdownBook/Document.pm
+++ b/scripts/MarkdownBook/Document.pm
@@ -94,87 +94,4 @@ sub next
 	return $old;
 }
 
-sub parse_html
-{
-	my ($self) = @_;
-	my $file = $self->{'book'}->dir() . '/' . $self->{'file'} . '.html.in';
-
-	$self->{'tree'} = HTML::TreeBuilder->new();
-	$self->{'tree'}->parse_file($file);
-}
-
-sub number_sections
-{
-	my ($self) = @_;
-
-	my @headers;
-	my $header;
-	my @secnums = (0, 0);
-	my $curlev = -1;
-	my $newlev;
-	my $secstr;
-	my @children;
-	my $sectitle;
-	my $secid;
-
-	@{$self->{'tree_body'}} = MarkdownBook::HTMLTree::find_elements_by_tag_names(
-		$self->{'tree'}, ('body'));
-	@headers = MarkdownBook::HTMLTree::find_elements_by_tag_names(
-		@{$self->{'tree_body'}}[0], ('h1', 'h2'));
-
-	foreach $header (@headers) {
-
-		# Calculate section number.
-		$newlev = $header->tag();
-		$newlev =~ s/^h(\d)$/$1/;
-		if ($newlev != $curlev) {
-			foreach (@secnums[$newlev .. $#secnums]) {
-				$_ = 0;
-			}
-		}
-		$curlev = $newlev;
-		++$secnums[$newlev - 1];
-		$secstr = join('.', @secnums);
-		$secstr =~ s/(\.0)*$//;
-
-		MarkdownBook::HTMLTree::each_text(sub {
-
-				# Prefix section title with section number.
-				my $sectitle = $_[1];
-				$sectitle =~ s/^([^\[]+)[ ]*\[[^\]]+\]$/$_[2].$secstr $1/;
-
-				# Set "id" attribute.
-				if ($_[1] =~ m/^[^\[\]]*\[([^\]]+)\][^\[\]]*$/) {
-					my $secid = $_[1];
-					$secid =~ s/^[^\[\]]*\[([^\]]+)\][^\[\]]*$/$1/;
-					${$_[0]}->attr('id', $secid);
-				}
-
-				# Set section title.
-				$_[1] = $sectitle;
-
-			}, $header, $self->{'id'});
-
-	}
-}
-
-sub output
-{
-	my ($self) = @_;
-
-	my $elem;
-	my %opt_end_tags;
-	my $out;
-
-	# Don't omit any end tags.
-	%opt_end_tags = map([$_ => 0], %HTML::Element::optionalEndTag);
-
-	foreach $elem (@{$self->{'tree_body'}}[0]->content_list()) {
-		# It's safe to assume (ref($elem) eq 'HTML::Element').
-		$out .= $elem->as_HTML('<>&', '', \%opt_end_tags) . "\n";
-	}
-
-	return $out;
-}
-
 1;
diff --git a/scripts/MarkdownBook/Document/HTML.pm b/scripts/MarkdownBook/Document/HTML.pm
new file mode 100644
index 0000000..ce19f45
--- /dev/null
+++ b/scripts/MarkdownBook/Document/HTML.pm
@@ -0,0 +1,108 @@
+# Copyright (C) 2012 Patrick "P. J." McDermott
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+use MarkdownBook::Document;
+
+package MarkdownBook::Document::HTML;
+
+our @ISA = qw(MarkdownBook::Document);
+
+sub parse_html
+{
+	my ($self) = @_;
+	my $file = $self->{'book'}->dir() . '/' . $self->{'file'} . '.html.in';
+
+	$self->{'tree'} = HTML::TreeBuilder->new();
+	$self->{'tree'}->parse_file($file);
+}
+
+sub number_sections
+{
+	my ($self) = @_;
+
+	my @headers;
+	my $header;
+	my @secnums = (0, 0);
+	my $curlev = -1;
+	my $newlev;
+	my $secstr;
+	my @children;
+	my $sectitle;
+	my $secid;
+
+	@{$self->{'tree_body'}} = MarkdownBook::HTMLTree::find_elements_by_tag_names(
+		$self->{'tree'}, ('body'));
+	@headers = MarkdownBook::HTMLTree::find_elements_by_tag_names(
+		@{$self->{'tree_body'}}[0], ('h1', 'h2'));
+
+	foreach $header (@headers) {
+
+		# Calculate section number.
+		$newlev = $header->tag();
+		$newlev =~ s/^h(\d)$/$1/;
+		if ($newlev != $curlev) {
+			foreach (@secnums[$newlev .. $#secnums]) {
+				$_ = 0;
+			}
+		}
+		$curlev = $newlev;
+		++$secnums[$newlev - 1];
+		$secstr = join('.', @secnums);
+		$secstr =~ s/(\.0)*$//;
+
+		MarkdownBook::HTMLTree::each_text(sub {
+
+				# Prefix section title with section number.
+				my $sectitle = $_[1];
+				$sectitle =~ s/^([^\[]+)[ ]*\[[^\]]+\]$/$_[2].$secstr $1/;
+
+				# Set "id" attribute.
+				if ($_[1] =~ m/^[^\[\]]*\[([^\]]+)\][^\[\]]*$/) {
+					my $secid = $_[1];
+					$secid =~ s/^[^\[\]]*\[([^\]]+)\][^\[\]]*$/$1/;
+					${$_[0]}->attr('id', $secid);
+				}
+
+				# Set section title.
+				$_[1] = $sectitle;
+
+			}, $header, $self->{'id'});
+
+	}
+}
+
+sub output
+{
+	my ($self) = @_;
+
+	my $elem;
+	my %opt_end_tags;
+	my $out;
+
+	# Don't omit any end tags.
+	%opt_end_tags = map([$_ => 0], %HTML::Element::optionalEndTag);
+
+	foreach $elem (@{$self->{'tree_body'}}[0]->content_list()) {
+		# It's safe to assume (ref($elem) eq 'HTML::Element').
+		$out .= $elem->as_HTML('<>&', '', \%opt_end_tags) . "\n";
+	}
+
+	return $out;
+}
+
+1;
diff --git a/scripts/MarkdownBook/Document/HTML/Appendix.pm b/scripts/MarkdownBook/Document/HTML/Appendix.pm
new file mode 100644
index 0000000..506b7d2
--- /dev/null
+++ b/scripts/MarkdownBook/Document/HTML/Appendix.pm
@@ -0,0 +1,26 @@
+# 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::Document::HTML;
+use MarkdownBook::Document::Appendix;
+
+package MarkdownBook::Document::HTML::Appendix;
+
+our @ISA = qw(MarkdownBook::Document::Appendix MarkdownBook::Document::HTML);
+
+1;
diff --git a/scripts/MarkdownBook/Document/HTML/Chapter.pm b/scripts/MarkdownBook/Document/HTML/Chapter.pm
new file mode 100644
index 0000000..49d2511
--- /dev/null
+++ b/scripts/MarkdownBook/Document/HTML/Chapter.pm
@@ -0,0 +1,26 @@
+# 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::Document::HTML;
+use MarkdownBook::Document::Chapter;
+
+package MarkdownBook::Document::HTML::Chapter;
+
+our @ISA = qw(MarkdownBook::Document::Chapter MarkdownBook::Document::HTML);
+
+1;
diff --git a/scripts/MarkdownBook/Document/HTML/Index.pm b/scripts/MarkdownBook/Document/HTML/Index.pm
new file mode 100644
index 0000000..355f179
--- /dev/null
+++ b/scripts/MarkdownBook/Document/HTML/Index.pm
@@ -0,0 +1,26 @@
+# 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::Document::HTML;
+use MarkdownBook::Document::Index;
+
+package MarkdownBook::Document::HTML::Index;
+
+our @ISA = qw(MarkdownBook::Document::Index MarkdownBook::Document::HTML);
+
+1;
diff --git a/scripts/postproc.pl b/scripts/postproc.pl
index d45b022..e9bee91 100755
--- a/scripts/postproc.pl
+++ b/scripts/postproc.pl
@@ -18,14 +18,14 @@
 use strict;
 use warnings;
 
-use MarkdownBook::Book;
+use MarkdownBook::Book::HTML;
 
 my $doc_dir;
 my $book;
 
 ($doc_dir) = @ARGV;
 
-$book = MarkdownBook::Book->new($doc_dir);
+$book = MarkdownBook::Book::HTML->new($doc_dir);
 
 $book->create_documents();
 $book->parse_documents();
--
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