Room::getPreviousContent(): Don't skip if the last job just finished

working

The sequence is: RoomMessagesJob::success -> addHistoricalMessageEvents
-> MessageEventModel notification -> QML notification about model reset
-> MessageEventModel completes updating -> QML updates from the model
but by then scrolling has already stopped at the oldest (just loaded)
event -> since there's no momentum, next batch is not fetched. In order
to address this, two things are done: in QML, the current position is
checked in modelReset() handler; in Room (this commit), prev_batch is
updated before historical messages are added (and the model gets
notified, respectively), to prevent firing another job with the old
prev_batch.

0 files changed, 0 insertions, 0 deletions