How do I get the Joomla-3.x pagination prev/next link, using the getData() function, in the content plugin with the onContentPrepare event?
What is the work of $limitstart here: onContentPrepare($context, &$article, &$params, $limitstart)
I haven't looked close enough to verify, but you might want to have a look at:
$article->pagination print_r that bad-boy to see what's in it. I believe that's going to contain the links you're looking for.
onContentPrepare $limitstart designated which page of a paginated article to start on. If you've used pagebreaks, this is used. Convenient if you want your content plugin to run on only certain pages.
The arguments name is "page" not "limitstart". From the docs it mans: "An integer that determines the "page" of the content that is to be generated. Note that in the context of views that might not generate HTML output, a page is a reasonably abstract concept that depends on the context."