Support for :nth() page selectors

[Smylers]

WeasyPrint doesn't yet support GCPM's page selectors and page groups, for being able to do things like have the first page of each chapter use different page headings and footers.

This is a documented limitation (and this isn't a complaint!). I'm just opening this now so that we have an issue URL to put in the comment of a workaround we've implemented; then any future developer on our code who encounters the workaround can easily check whether it's still necessary.

[liZe]

WeasyPrint doesn't yet support GCPM's page selectors and page groups, for being able to do things like have the first page of each chapter use different page headings and footers.

True, but it supports named pages that may be helpful for this case.

[Tontyna]

@page :nth would be a great feature, though a quick reflection about how to implement it results in: "I'm not eager to write the code."

[Smylers]

named pages that may be helpful for this case.

Oh, so it is — thanks!

(Apparently I can't read. I'd looked at that and somehow given myself the impression that if an <h2> with a named page specified was immediately followed by a <p> in the default page type then there'd end up being a page-break between them. But I was wrong, and both CSS and WeasyPrint do exactly what I want here. Thank you.)

[LukasKlement]

I'm having exactly this issue at the moment, where I do not know how it can be solved without the :nth() page selector:

• I am rendering trifold flyer, each page with columned content flowing from one page to the next
• The pages are being merged in the correct order using pdfrw PDFMerge()
• I need bleed to be on the outside borders, but not on the inside (page 1: <>mm <>mm <>mm 0; page 2: <>mm 0 <>mm <>mm; page 3: <>mm 0; etc.)

Since columns flow from one page to the next, I cannot use named pages. Setting a single bleed value will create the bleed also at the fold ... how would you solve this without the @page :nth() feature?

[liZe]

how would you solve this without the @page :nth() feature?

You probably can't, :nth() looks like the perfect solution for that!

The more I think about this feature, the more it seems easy to add… Of course, it's always "not that easy" in the end 😄. I'll check that soon.

[liZe]

:nth(x) and :nth(An+B) syntaxes have been added in the nth-page branch. I'd be happy to have some testers!

Does anyone need page groups here?

[liZe]

@Smylers I'll close this issue when :nth support is merged, and change the title accordingly. Would you mind opening a new issue for page groups if you are interested in the page groups issue?