duplicated entries in toc not functioning properly

[chiwhalee]

When I have a toc like the following:

1. HEAD_A
   1. a
   2. b
2. HEAD_B
   1. a
   2. c
      If I press 'a' under HEAD_B, it can only jumps to the place where the 'a' under HEAD_A points to. Of course one could distinguish the two 'a' by giving them different names, but this makes the string longer and not clear.

[minrk]

Each heading gets an id based of its content text. HTML IDs must be unique. If there's more than one element with the same ID, visiting the #id hash will navigate to the first. The toc extension doesn't set the IDs, IPython does.

[chiwhalee]

Is there a workaround for this issue? e.g. let those id generated not just by "a" but by "#HeaD_A#a". Do you plan to improve this?

[minrk]

In the toc extension, while walking IDs to build the toc tree, it would be possible to keep track of seen IDS, and de-duplicate the IDs. It might be tricky to add to IPython itself, since it doesn't normally keep track of the IDs.

[chiwhalee]

The toc extension is really great. Could you add the de-duplicate functionality, if it is not too involved?

[minrk]

I'm not planning on it, but a pull request would be welcome.

[diego898]

👍