EBook::EPUB.pm add_navpoint use

Question

I have one large .xhtml file consisting of many chapters. There are div tags with e.g. id="article2" on some of them. I am now trying to make an ebook out of it. EBook::EPUB is a nice package that helps greatly.

And I have most of it working well. Alas, the following does not work:

for (my $cnt=1; $cnt<=$#chapters; ++$cnt) {
  $epub->add_navpoint(
                      label => 'Chapter '.$cnt.": $memotitles[$cnt]",
                      id => 'article'.$cnt,
                      content => 'text.xhtml',
                      play_order => $cnt );
}

When I open the epub file in iBooks, it shows me the labels, but clicking on any of them does not move me to the right page in the epub file.

I know that it is possible to get ids from a book where each chapter is its own .xhtml file. alas, is it possible to get ids to reference waypoints (chapters) from inside the same .xhtml file? Or do I really have to break my large .xhtml file into many smaller ones?

Advice appreciated.

Answer 1

"content" property should have id of the element in the xhtml page. So something like this should work:

for (my $cnt=1; $cnt<=$#chapters; ++$cnt) {
  $epub->add_navpoint(
                      label => 'Chapter '.$cnt.": $memotitles[$cnt]",
                      id => 'article'.$cnt,
                      content => 'text.xhtml#article' . $cnt,
                      play_order => $cnt );
}