Fixes https://github.com/vector-im/riot-web/issues/11496
Fixes https://github.com/vector-im/riot-web/issues/11385
Fixes https://github.com/vector-im/riot-web/issues/10007
Fixes https://github.com/vector-im/riot-web/issues/9769
React does (kinda) bind `this._isUnmounting` for us in the context of the EventTile, but the EventTile then passes the function straight through to the ReadReceiptMarker component, which then binds it in the context of EventTile. This results in `this._mounted` being falsey all the time, preventing the ReadReceiptMarker from hitting the code where it updates rrInfo in its unmount.
The velocity stuff is smart enough to realize that it has a read receipt and shuffles everything over by one, but when it goes to check the starting height (which will be null/undefined because the RRMarker didn't update it) it assumes it has never seen the receipt before and appends it again - this is what causes some holes/stacking.
By forcefully binding the `this._isUnmounting` function we ensure that the `this._mounted` variable is correctly referenced in the context of the MessagePanel, allowing the RRMarker to update its position, and therefore allowing the velocity behaviour to be consistent.
Removes one of the two places we use Velocity, so we're one step
closer to getting rid of it for good.
Should therefore fix the fact that Velocity is leaking data entries
and therefore <hr> elements.
Hopefully also makes the logic in getEventTiles incrementally simpler,
if still somwewhat byzantine.
I was about to add the getDerivedStateFromProps function to change
how read markers worked, but doing that in an old style class
means the statics object, so let;s just convert the thing.
This adds additional receipt storage to so that we can handle cases where the
receipts and events lists get out of sync. If we ever find a user who previously
had a receipt but momentarily no longer does, we recover their previous receipt
and go with that until we hear something new.
Part of https://github.com/vector-im/riot-web/issues/9745
This changes how we determine read receipts for the entire message panel. We now
calculate read receipts for all events up front, which makes it easier to handle
hidden events by moving their read receipts up to the last shown event for
display purposes.
Part of https://github.com/vector-im/riot-web/issues/9745
This fixes an error that crashed that notifications panel because it was trying
to read reactions, even though we currently don't aggregate them there. This
change is more explicit about exactly which views should try to show reactions.
Fixes https://github.com/vector-im/riot-web/issues/9713
instead of setting a min-height on the whole timeline,
track how much height we need to add to prevent shrinking
and set paddingBottom on the container element of the timeline.
