... hopefully fixing https://github.com/vector-im/vector-web/issues/1437 in the
process.
The idea here is that, when we remove a read-receipt from the DOM, we stash its
position in a map. Then, when the read-receipt appears again attached to
another event, we know where to start the transition.
TimelinePanel rerenders are expensive, so we want to do as few as possible. So,
when we get a new timeline event, make sure that we update the RM and add the
new event at the same time.
Each individual eventtile isn't particularly expensive, but when you have 500
of them, they start adding up. Shuffle some of the stuff into MessagePanel, so
that we can shouldComponentUpdate EventTiles properly.
This hopefully fixes an issue where joining a federated room via the directory
would get stuck at a spinner of doom, due to us not recognising the room in
question when it came down the /sync. We now catch the room id in the response
from the /join, and use it to match up the room in onRoom.
props.roomAlias, props.roomId, and state.room.roomId were somewhat confusing,
so I've tried to rationalise them:
* props.roomAlias (named thus to stop you assuming it's a room id) is the
thing that the parent component uses to identify the room of interest, and
can be either an ID or an alias (ie, it replaces props.roomId and
props.roomAlias)
* Everything that needs a room ID now has to get it from state.room.roomId.
The MatrixClient never gets unmounted in the real app, but I've been working on
some tests which would rather like to be able to create and destroy MatrixChats
and not have the clients hang around forever.
Under certain conditions, it was possible to get stuck in a state where any
user-initiated scroll would be met with "Working around
vector-im/vector-web#528" and overridden. Fix this by removing the duplication
between _lastSetScroll and recentEventScroll, and using _lastSetScroll which is
more reliable.
I think this was responsible for the readmarker just disappearing rather than
animating.
While we're here, decrease the delay on the animation, and instead make it take
slightly longer to disappear.
Adds a missing 'return' statement which meant that, even if we already had the
relevant event loaded into the DOM, we would rebuild it when the user clicked
on the "(^) Unread messages" bar.
