MatrixClient to be used for context/pagination requests.
The timelineSet to track
Configuration options for this window
Check if this window can be extended
This returns true if we either have more events, or if we have a pagination token which means we can paginate in that direction. It does not necessarily mean that there are more events available in that direction at this time.
EventTimeline.BACKWARDS to check if we can paginate backwards; EventTimeline.FORWARDS to check if we can go forwards
true if we can paginate in the given direction
Try to extend the window using events that are already in the underlying TimelineIndex.
EventTimeline.BACKWARDS to try extending it backwards; EventTimeline.FORWARDS to try extending it forwards.
number of events to try to extend by.
true if the window was extended, false otherwise.
Get a list of the events currently in the window
the events in the window
Get the TimelineIndex of the window in the given direction.
EventTimeline.BACKWARDS to get the TimelineIndex at the start of the window; EventTimeline.FORWARDS to get the TimelineIndex at the end.
The requested timeline index if one exists, null otherwise.
Initialise the window to point at a given event, or the live timeline
OptionalinitialEventId: stringIf given, the window will contain the given event
Size of the initial window
Attempt to extend the window
EventTimeline.BACKWARDS to extend the window backwards (towards older events); EventTimeline.FORWARDS to go forwards.
number of events to try to extend by. If fewer than this number are immediately available, then we return immediately rather than making an API call.
whether we should make API calls to fetch further events if we don't have any at all. (This has no effect if the room already knows about additional events in the relevant direction, even if there are fewer than 'size' of them, as we will just return those we already know about.)
limit for the number of API requests we should make.
Promise which resolves to a boolean which is true if more events were successfully retrieved.
Construct a TimelineWindow.
This abstracts the separate timelines in a Matrix Room into a single iterable thing. It keeps track of the start and endpoints of the window, which can be advanced with the help of pagination requests.
Before the window is useful, it must be initialised by calling TimelineWindow#load.
Note that the window will not automatically extend itself when new events are received from /sync; you should arrange to call TimelineWindow#paginate on RoomEvent.Timeline events.
Note that constructing an instance of this class for a room adds a listener for RoomEvent.Timeline events which is never removed. In theory this should not cause a leak since the EventEmitter uses weak mappings.