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Make room-switching quicker

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Avoid delaying a reactor tick when switching rooms, to make room-switching
(feel) a bit snappier.
This commit is contained in:
Richard van der Hoff 2016-02-26 12:25:46 +00:00
parent 2bd6529ca0
commit 0d1c85eb7c
1 changed files with 26 additions and 14 deletions
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40
src/components/structures/TimelinePanel.js
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@ -442,29 +442,33 @@ var TimelinePanel = React.createClass({
* returns a promise which will resolve when the load completes.
*/
_loadTimeline: function(eventId, pixelOffset) {
// TODO: we could optimise this, by not resetting the window if the
// event is in the current window (though it's not obvious how we can
// tell if the current window is on the live event stream)
this._timelineWindow = new Matrix.TimelineWindow(
MatrixClientPeg.get(), this.props.room,
{windowLimit: TIMELINE_CAP});
var prom = this._timelineWindow.load(eventId, INITIAL_SIZE);
this.setState({
events: [],
timelineLoading: true,
});
this._timelineWindow = new Matrix.TimelineWindow(
MatrixClientPeg.get(), this.props.room,
{windowLimit: TIMELINE_CAP});
// if we already have the event in question, TimelineWindow.load
// returns a resolved promise.
//
// In this situation, we don't really want to defer the update of the
// state to the next event loop, because it makes room-switching feel
// quite slow. So we detect that situation and shortcut straight to
// calling _onTimelineUpdated and updating the state.
return this._timelineWindow.load(eventId, INITIAL_SIZE).then(() => {
debuglog("TimelinePanel: timeline loaded");
var onLoaded = () => {
this._onTimelineUpdated(true);
}).finally(() => {
this.setState({
timelineLoading: false,
}, () => {
this.setState({timelineLoading: false}, () => {
// initialise the scroll state of the message panel
if (!this.refs.messagePanel) {
// this shouldn't happen.
// this shouldn't happen - _onTimelineUpdated checks we're
// mounted, and timelineLoading is now false.
console.log("can't initialise scroll state because " +
"messagePanel didn't load");
return;
@ -478,7 +482,15 @@ var TimelinePanel = React.createClass({
this.sendReadReceipt();
this.updateReadMarker();
});
});
};
if (prom.isPending()) {
prom = prom.then(onLoaded);
} else {
onLoaded();
}
prom.done();
},
_onTimelineUpdated: function(gotResults) {