Appending `?context=#` to a permalink will highlight the permalinked
comment and display above it up to 8 ancestors, similar to Reddit's
behaviour. To keep things fast, this update required that the Pushshift
comments endpoint work with `ids` queries which was fixed around May 11.
Removed/deleted self-posts are still fetched from Pushshift to get
the selftext, however there's no value in fetching link-posts.
Also:
* Don't display '[deleted]' if no selftext was deleted.
* Add key attributes to the post <div> so that React recreates
it instead of mutating it after the Post loads. This prevents
transitioning the background color (from the dark/light mode css).
Visiting a permalink (from an internal or external link) now scrolls to
just past the post, and both parent and permalinks scroll smoothly where
appropriate; it makes sense for internal permalinks to immediately jump.
Beforehand, visiting a permalink would cause Unddit to begin loading
from the Post's first comment. If the max-to-download setting was too
small, and the permalinked comment wasn't yet encountered, no comment
tree would be displayed.
Now, only comments that occur at the same time as the permalinked
comment or later (chronologically) are downloaded.
This also adds a Parent link to each comment. When viewing a permalinked
comment, clicking the top-level Parent link will download only new
comments between the parent and child comments. Likewise, clicking the
'view rest of comments' link will only download new comments from the
first comment up until the previously viewed comment.
In general, Unddit will not re-download comments that it knows it has
previously downloaded, nor download more than max-to-download comments
per link clicked. This can leave 'gaps' in the list of downloaded
comments. If the 'load more comments' link is clicked, Unddit will only
download comments that can fill such gaps between the currently-linked
permalink (or if not viewing one, the first comment) and the last, up to
the max-to-download setting.
