* renames RoomTooltip to be a generic Tooltip (which it is)
* hooks it into Field to show validation results
* adds onValidate to Field to let Field instances call an arbitrary validation function
Rebased from @ara4n's https://github.com/matrix-org/matrix-react-sdk/pull/2550
by @jryans. Subsequent commits revise and adapt this work.
Splits UserActivity into a tristate of 'active' (last < 1s), 'passive' (lasts a
couple of mins) and neither. Read receipts are sent when 'active', read markers
are sent while 'passive'.
Also fixed a document / window mix-up on the 'blur' handler.
Also adds a unit test for UserActivity because it's quite complex now
(and changes UserActivity to make it testable by accessing the singleton
via sharedInstance() rather than exporting it directly).
Fixes https://github.com/vector-im/riot-web/issues/9023
Fixes https://github.com/vector-im/riot-web/issues/6875
Instead of overwriting what we have, we'll load the session we have and try to warn the user that they have verified an address for someone else.
as we're approaching from the last node, if we're scrolled up,
the first node we encounter would be below the bottom of the viewport
change the logic to stop at the first node that has its top
above the viewport bottom.
When completely scrolled up, this was causing nodes way below
the viewport to be selected as the reference for the pixelOffset,
and when pagination came in, it would immediately try to apply
the big negative pixelOffset, scrolling to a negative scrollTop,
thus going to the top again, and triggering another pagination,
entering in an infinite pagination loop until you scrolled down.
this is not nearly as smooth as using ResizeObserver, as the
callback rate is a lot lower, but seems to be quite a bit better
than what we have right now, without the 7% cpu hog that
the requestAnimationFrame polling fallback has.
before we would clear it as soon as you were 1px away from
the bottom of the timeline, which would still create jumping as
the whitespace would around 36px. To play it safe, we only clear it
after moving 200px from the bottom.
Also include "local echo" scroll events, caused by setting scrollTop
