Pdfmake: Conditional PageBreak

[mico88]

I would need to add page break in case of a paragraph (table, table row) is split between two pages. I mean avoid automatic page brake inside unwanted place. And is it possible to align part of a page vertically? To bottom for example, but only if fits all the content. Footer is not a solution in this case assume.

[mico88]

I just discovered pageBreakBefore function :). But still looking for possibility to align node vertically to the bottom.

[liborm85]

Vertical alignment to bottom is not supported. So how do you write, you can use pageBreakBefore.

[mazak]

I'm also looking for a way to mark a paragraph to avoid page breaks inside it. In case there would be a page break inside - use a page break before.

So, an equivalent of CSS:
page-break-inside: avoid;

[ujtordai]

How can I detect if a content is fit to one page or not (it need more pages)?

[pedrohql]

@ujtordai I know I'm late, but to leave your question answered there's a property of currentNode called pageNumbers. It's an array containing the numbers of the pages which the current node is split between.

To break before a node if its content is split between pages:

pageBreakBefore: function (currentNode, followingNodesOnPage,
    nodesOnNextPage, previousNodesOnPage) {
    return currentNode.pageNumbers.length > 1;
}

You probably should also consider if the node is already at the start of the page, because in this case the content can't fit to only one page:

[...]
 return previousNodesOnPage.length > 0 && currentNode.pageNumbers.length > 1;

[coyotte508]

I know I'm even later, but here's my trick.

In the document definition, I have this:

pdfMake.createPdf({
    content: [...],
    pageBreakBefore(currentNode, followingNodesOnPage, nodesOnNextPage, previousNodesOnPage) {
      return currentNode.pageNumbers.length > 1 && currentNode.unbreakable;
    }
  })

And when I want to make a node "unbreakable", I just do this:

{
   stack: ["a stack", "of", "unbreakable", "paragraphs"]
   unbreakable: true
}

That way the 4 lines of the stacks are not broken. Of course if your unbreakable object takes the whole page you'll have the same issue described by @pedrohql, in which case you would want to change the pageBreakBefore function to add a previousNodesOnPage.length > 0.

[DeepakKapiswe]

Thanks a lot @coyotte508 , It helped me a lot, I was wondering how to implement page breaking rule for long. Maybe this should be published in the documentation page.