In my Zotero TeXmacs integration:
https://github.com/KarlHegbloom/zotero-texmacs-integration
... the zcite tags content is inaccessible unless you deactivate the tag. I
don't want to change that, and don't know how... When the cursor is to the
left of the tag, and I press the right-arrow, the cursor jumps to the right
end of the tag, and then the tag is highlighted with the light-blue box. So
far so good, because now I can use Backspace to deactivate it, or Tab to
call the editCitation function...
The problem is that when I push Ctrl-PageDown or use the toolbar icon to
call traverse-next, TeXmacs bombs with an invalid cursor error. It's also
broken whenever there are zcite tags in the document even when trying to
traverse between other kinds of tags. In a document with nothing in it but
a number of \strong{strong content} tags in it, I can traverse-next and
traverse-previous with no problem. But when I insert any zcite tags between
those, I can not traverse-next, but I can traverse-previous. I noticed that
with the \strong{} tags, it leaves the cursor at the start of the tag's
content when I traverse-next, and at the end of the content when I
traverse-previous.
So for the zcite, where the content is inaccessible, the traverse-previous,
which leaves the cursor in a valid location, works fine, but the
traverse-next is broken, because it produces an invalid cursor location.
I tried to overload traverse-next for the (:require (in-zcite?)) context...
and have given up. It doesn't work. I think that the problem is at a lower
level, in the C++ that I don't fully understand yet, and that what it needs
is a check for when the cursor would be invalid, and to have it move it to
a valid position instead of throwing the error. I don't know how to do that.
Karl Hegbloom
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