EPub to PDF, Orphans and Pagebreaks

[mmat1]

I want to convert some of my E-Pubs to PDF.

1) How do I avoid orphans and widows? Callibre seams to ignore these attributes in any place if the CSS.

2) How do I keep Stuff together ?
Things like:
<h3>Headline</h3>
<p class "subtitle">supptitle</p>
<p>first paragraph of Text</p>

should not be ripped apart. Callibre seams to ignore the "page-break-after: avoid"

[kovidgoyal]

calibre uses webkit's css3 columns implementation to paginate ebooks for conversion to PDF. As far as I know, columns does not support widows and orphans. page-break-after:void should be supported, but note that it is simply a request, if the text does nto fit on the page, it will be broken.

[bowlins]

I've just been experimenting with widows and orphans and may have found a temporary workaround.

The solution is a bit precarious and I wouldn't trust it 100%. At first, the rules seemed to work. However, since webkit doesn't seem to support orphans/widows for screen media, I tested with more books and, indeed, the properties were buggy. They were breaking the text but the following trick seems to work for now:

div {
   page-break-after:avoid;
   page-break-before:avoid;
   page-break-inside:avoid;
}
p {
   page-break-after:avoid;
   widows: 2;
   orphans: 2;
}

On its own, widows and orphans seem to work on plain text. However, divs and images may change the flow and create broken text, paragraph duplication and other nasty bugs.

In my case, adding the page break rules for divs too seems to do the trick (for now)