From 8f4cc803a74728b07532a6c2ff2788b63b012d3c Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Sun, 12 Aug 2012 16:38:48 -0400
Subject: Merge branch 'markdown-book' of git://git.os.pehjota.net/users/pehjota/doc/policies

---
(limited to 'scripts/MarkdownBook/Document/html.pm')

diff --git a/scripts/MarkdownBook/Document/html.pm b/scripts/MarkdownBook/Document/html.pm
new file mode 100644
index 0000000..60f22c7
--- /dev/null
+++ b/scripts/MarkdownBook/Document/html.pm
@@ -0,0 +1,153 @@
+# 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;
+use MarkdownBook::HTMLTree;
+use Carp;
+use Text::Markdown;
+use HTML::TreeBuilder;
+use HTML::Template;
+
+package MarkdownBook::Document::html;
+
+our @ISA = qw(MarkdownBook::Document);
+
+sub output
+{
+	my ($self) = @_;
+	my $text;
+	my $doc;
+	my $sec;
+
+	# Substitute macros.
+	$text = $self->{'book'}->subst_macros(
+		$self->{'source_text'});
+
+	# Append link definitions.
+	$text .= "\n";
+	foreach $doc (@{$self->{'book'}->documents()}) {
+		$text .= "\n";
+		$text .= '[';
+		$text .= $doc->file();
+		$text .= ']: ';
+		$text .= $doc->file();
+		$text .= '.html';
+		foreach $sec (@{$doc->sections()}) {
+			$text .= "\n";
+			$text .= '[';
+			$text .= $sec->id();
+			$text .= ']: ';
+			$text .= $doc->file();
+			$text .= '.html#';
+			$text .= $sec->id();
+		}
+	}
+
+	# Convert to HTML.
+	$text = Text::Markdown::Markdown($text);
+
+	# Set "id" attributes of headings.
+	$self->_do_set_heading_id_attrs($text);
+
+	# Output the templated HTML.
+	$self->_do_output_template();
+
+	# Clean up.
+	$self->{'tree'}->delete();
+}
+
+sub _do_set_heading_id_attrs
+{
+	my ($self, $text) = @_;
+	my @headings;
+	my $heading;
+	my $i = -1;
+
+	# Parse HTML.
+	$self->{'tree'} = HTML::TreeBuilder->new();
+	$self->{'tree'}->parse($text);
+	$self->{'tree'}->eof($text);
+
+	# Find the "body" element.
+	@{$self->{'tree_body'}} = MarkdownBook::HTMLTree::find_elements_by_tag_names(
+		$self->{'tree'}, ('body'));
+
+	# Don't modify headings of index documents.
+	return if $self->{'type'} eq 'index';
+	
+	# Find all headings.
+	@headings = MarkdownBook::HTMLTree::find_elements_by_tag_names(
+		@{$self->{'tree_body'}}[0], ('h1', 'h2'));
+
+	# Set "id" attributes.
+	foreach $heading (@headings) {
+		$heading->attr('id', ${$self->{'sections'}}[++$i]->id());
+	}
+}
+
+sub _do_output_template
+{
+	my ($self) = @_;
+
+	my $doc_tmpl;
+	my %opt_end_tags;
+	my $elem;
+	my $body;
+	my $doc_fh;
+
+	$doc_tmpl = HTML::Template->new(filename => 'include/document.tmpl');
+
+	# Don't omit any end tags.
+	%opt_end_tags = map([$_ => 0], %HTML::Element::optionalEndTag);
+
+	# Get HTML text of all children of the "body" element.
+	foreach $elem (@{$self->{'tree_body'}}[0]->content_list()) {
+		# It's safe to assume (ref($elem) eq 'HTML::Element').
+		$body .= $elem->as_HTML('<>&', '', \%opt_end_tags) . "\n";
+	}
+
+	$doc_tmpl->param(IS_INDEX => ($self->{'type'} eq 'index'));
+
+	$doc_tmpl->param(BOOK_TITLE => $self->{'book'}->title());
+	$doc_tmpl->param(TITLE => $self->{'title'});
+	$doc_tmpl->param(CHAPT_TITLE => $self->full_title());
+
+	if (defined($self->{'prev'})) {
+		$doc_tmpl->param(PREV_LINK => $self->{'prev'}->file() . '.html');
+		$doc_tmpl->param(PREV_TITLE => $self->{'prev'}->title());
+	} else {
+		$doc_tmpl->param(PREV_LINK => undef);
+		$doc_tmpl->param(PREV_TITLE => undef);
+	}
+	if (defined($self->{'next'})) {
+		$doc_tmpl->param(NEXT_LINK => $self->{'next'}->file() . '.html');
+		$doc_tmpl->param(NEXT_TITLE => $self->{'next'}->title());
+	} else {
+		$doc_tmpl->param(NEXT_LINK => undef);
+		$doc_tmpl->param(NEXT_TITLE => undef);
+	}
+
+	$doc_tmpl->param(BODY => $body);
+
+	open($doc_fh, '>', $self->file_path() . '.html')
+		or Carp::croak('Cannot open "' . $self->{'file'} . '" destination document');
+	$doc_tmpl->output(print_to => $doc_fh);
+	close($doc_fh);
+}
+
+1;
--
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