Implement links/targets within a page

[Klortho]

Allowing intra-page links, to targets within an entry (for example, the ones at the top of this page).

Because we're using the fragment identifier to specify the entry itself, we'll need something like #p=entry;t=target.

Details:

• Treat it as a state machine, with these states:
  • p = null; t = null (top of home)
  • p = $page; t = null (top of $page)
  • p = null; t = $target ($target within home)
  • p = $page; t = $target ($target within $page)
• Make sure you cover/test all of the transitions:
  • From outside directly into a given state
  • Between the states
• Make sure "http://.../" and "http://.../#" are treated exactly the same in every case.
• Add killer feature: a permalink icon (e.g. GitHub's .octicon-link - UTF+f05c (https://github.com/styleguide/css/7.0)) that appears whenever you hover over a header that has an @id and/or @name.
  • See, e.g., http://jats.nlm.nih.gov/publishing/tag-library/1.0/n-pxu2.html#pub-tag-names-cites
  • Probably massage the JATS Tag Library content to move the @id/@name from the element preceding the header, onto the header itself.