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Merge pull request #567 from matrix-org/luke/fix-agressive-unpagination

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Make the unpagination process less aggressive
This commit is contained in:
Richard van der Hoff 2016-11-22 17:53:44 +00:00 committed by GitHub
commit 422d5c0c92
2 changed files with 16 additions and 4 deletions
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15
src/components/structures/ScrollPanel.js
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@ -25,7 +25,10 @@ var DEBUG_SCROLL = false;
// The amount of extra scroll distance to allow prior to unfilling.
// See _getExcessHeight.
const UNPAGINATION_PADDING = 500;
const UNPAGINATION_PADDING = 1500;
// The number of milliseconds to debounce calls to onUnfillRequest, to prevent
// many scroll events causing many unfilling requests.
const UNFILL_REQUEST_DEBOUNCE_MS = 200;
if (DEBUG_SCROLL) {
// using bind means that we get to keep useful line numbers in the console
@ -361,7 +364,15 @@ module.exports = React.createClass({
}
if (markerScrollToken) {
this.props.onUnfillRequest(backwards, markerScrollToken);
// Use a debouncer to prevent multiple unfill calls in quick succession
// This is to make the unfilling process less aggressive
if (this._unfillDebouncer) {
clearTimeout(this._unfillDebouncer);
}
this._unfillDebouncer = setTimeout(() => {
this._unfillDebouncer = null;
this.props.onUnfillRequest(backwards, markerScrollToken);
}, UNFILL_REQUEST_DEBOUNCE_MS);
}
},

5
test/components/structures/TimelinePanel-test.js
View File

@ -341,8 +341,9 @@ describe('TimelinePanel', function() {
var events = scryEventTiles(panel);
expect(events[0].props.mxEvent).toBe(timeline.getEvents()[0]);
// Expect to be able to paginate forwards, having unpaginated a few events
expect(panel.state.canForwardPaginate).toBe(true);
// At this point, we make no assumption that unpagination has happened. This doesn't
// mean that we shouldn't be able to scroll all the way down to the bottom to see the
// most recent event in the timeline.
// scroll all the way to the bottom
return scrollDown();