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Improve shouldComponentUpdate for status and status_action_bar (#3323)

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Nolan Lawson 2017-05-26 05:05:52 -07:00 • committed by Eugen Rochko
parent 7c67cb5997
commit b00cb2aed3
2 changed files with 39 additions and 9 deletions
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37
app/javascript/mastodon/components/status.js
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@ -44,6 +44,35 @@ class Status extends ImmutablePureComponent {
isHidden: false,
}
// Avoid checking props that are functions (and whose equality will always
// evaluate to false. See react-immutable-pure-component for usage.
updateOnProps = [
'status',
'account',
'wrapped',
'me',
'boostModal',
'autoPlayGif',
'muted',
]
updateOnStates = []
shouldComponentUpdate (nextProps, nextState) {
if (nextProps.isIntersecting === false && nextState.isHidden) {
// It's only if we're not intersecting (i.e. offscreen) and isHidden is true
// that either "isIntersecting" or "isHidden" matter, and then they're
// the only things that matter.
return this.props.isIntersecting !== false || !this.state.isHidden;
} else if (nextProps.isIntersecting !== false && this.props.isIntersecting === false) {
// If we're going from a non-intersecting state to an intersecting state,
// (i.e. offscreen to onscreen), then we definitely need to re-render
return true;
}
// Otherwise, diff based on "updateOnProps" and "updateOnStates"
return super.shouldComponentUpdate(nextProps, nextState);
}
componentWillReceiveProps (nextProps) {
if (nextProps.isIntersecting === false && this.props.isIntersecting !== false) {
requestIdleCallback(() => this.setState({ isHidden: true }));
@ -52,14 +81,6 @@ class Status extends ImmutablePureComponent {
}
}
shouldComponentUpdate (nextProps, nextState) {
if (nextProps.isIntersecting === false && this.props.isIntersecting !== false) {
return nextState.isHidden;
}
return true;
}
handleRef = (node) => {
if (this.props.onRef) {
this.props.onRef(node);