Merge pull request #5745 from matrix-org/travis/fix-rr-maybe

Change read receipt drift to be non-fractional
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Travis Ralston 2021-03-10 17:39:16 -07:00 committed by GitHub
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@ -156,14 +156,14 @@ export default class ReadReceiptMarker extends React.PureComponent {
// then shift to the rightmost column,
// and then it will drop down to its resting position
//
// XXX: We use a fractional left value to trick velocity-animate into actually animating.
// XXX: We use a small left value to trick velocity-animate into actually animating.
// This is a very annoying bug where if it thinks there's no change to `left` then it'll
// skip applying it, thus making our read receipt at +14px instead of +0px like it
// should be. This does cause a tiny amount of drift for read receipts, however with a
// value so small it's not perceived by a user.
// Note: Any smaller values (or trying to interchange units) might cause read receipts to
// fail to fall down or cause gaps.
startStyles.push({ top: startTopOffset+'px', left: '0.001px' });
startStyles.push({ top: startTopOffset+'px', left: '1px' });
enterTransitionOpts.push({
duration: bounce ? Math.min(Math.log(Math.abs(startTopOffset)) * 200, 3000) : 300,
easing: bounce ? 'easeOutBounce' : 'easeOutCubic',