From c14216c2fe1f9fd569af8445a8fe24b8c8b0c7ae Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Mon, 13 Aug 2012 22:05:07 -0400
Subject: Index chapters by ID as well as sections.

---
diff --git a/lib/Text/MarkdownBook/Book.pm b/lib/Text/MarkdownBook/Book.pm
index 4c5f6c7..137a9fa 100644
--- a/lib/Text/MarkdownBook/Book.pm
+++ b/lib/Text/MarkdownBook/Book.pm
@@ -155,8 +155,9 @@ sub add_section
 
 	push(@{$self->{'sections'}}, $section);
 
-	# Index sections (not documents) by ID.
-	if (ref($section) eq 'Text::MarkdownBook::Section') {
+	if (ref($section) =~ m/^Text::MarkdownBook::Document/) {
+		$self->{'sections_by_id'}->{$section->file()} = $section;
+	} elsif (ref($section) eq 'Text::MarkdownBook::Section') {
 		$self->{'sections_by_id'}->{$section->id()} = $section;
 	}
 }
--
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