Previously, we required a signature at the end of the comment.
This was a pretty rough heuristic that did not correctly handle
many comments that we would consider entirely properly signed
in CommentParser (e.g. comments wrapped in formatting like
<small>…</small>, comments with a post-scriptum or in parentheses,
or comments generated by various templates).
Now we process the user input using the same code that adds reply
links, and only add a signature when we detect that there really
isn't a signature (including template-generated), or if the signature
is in the wrong place and would result in the reply link showing up
in the wrong place as well (not at the end of the comment).
Bug: T278442
Bug: T268558
Bug: T278355
Bug: T291421
Bug: T282983
Change-Id: I46b6110af328ebdf93b7dfc2bd941e04391a1599
We were rendering the preview in a completely different way from how
we would add the real reply, and the results would be different
sometimes, particularly for multi-line comments with messed-up markup.
Render it server-side instead, in a very similar way to real replies
(generating a DOM list node and transforming it through Parsoid),
although without the whole context of the page to improve performance.
We can remove a lot of client-side code that was used solely for this.
This will allow the preview to accurately display the signatures when
we change how they are added (T278442), without us having to implement
those changes again from scratch for the preview.
Change-Id: I53341f4d4075c25b67ec3b3032bff9b8a880dcd3
