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Use UNFILL_REQUEST_DEBOUNCE_MS constant, reset unfillDebouncer timeout reference.

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This commit is contained in:
Luke Barnard
2016-11-22 17:23:06 +00:00
parent d1a5d94916
commit 42fc7b1b66
1 changed files with 5 additions and 1 deletions
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6
src/components/structures/ScrollPanel.js
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@ -26,6 +26,9 @@ var DEBUG_SCROLL = false;
// The amount of extra scroll distance to allow prior to unfilling. // The amount of extra scroll distance to allow prior to unfilling.
// See _getExcessHeight. // See _getExcessHeight.
const UNPAGINATION_PADDING = 1500; 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) { if (DEBUG_SCROLL) {
// using bind means that we get to keep useful line numbers in the console // using bind means that we get to keep useful line numbers in the console
@ -367,8 +370,9 @@ module.exports = React.createClass({
clearTimeout(this._unfillDebouncer); clearTimeout(this._unfillDebouncer);
} }
this._unfillDebouncer = setTimeout(() => { this._unfillDebouncer = setTimeout(() => {
this._unfillDebouncer = null;
this.props.onUnfillRequest(backwards, markerScrollToken); this.props.onUnfillRequest(backwards, markerScrollToken);
}, 200); }, UNFILL_REQUEST_DEBOUNCE_MS);
} }
}, },