chinwagsocial/app/javascript/mastodon/features/ui/util/optional_motion.js
Nolan Lawson fa0be3f834 Add option to reduce motion (#5393)
* Add option to reduce motion

* Use HOC to wrap all Motion calls

* fix case-sensitive issue

* Avoid updating too frequently

* Get rid of unnecessary change to _simple_status.html.haml
2017-10-16 09:36:15 +02:00

34 lines
1 KiB
JavaScript

// Like react-motion's Motion, but checks to see if the user prefers
// reduced motion and uses a cross-fade in those cases.
import Motion from 'react-motion/lib/Motion';
import { connect } from 'react-redux';
const stylesToKeep = ['opacity', 'backgroundOpacity'];
const extractValue = (value) => {
// This is either an object with a "val" property or it's a number
return (typeof value === 'object' && value && 'val' in value) ? value.val : value;
};
const mapStateToProps = (state, ownProps) => {
const reduceMotion = state.getIn(['meta', 'reduce_motion']);
if (reduceMotion) {
const { style, defaultStyle } = ownProps;
Object.keys(style).forEach(key => {
if (stylesToKeep.includes(key)) {
return;
}
// If it's setting an x or height or scale or some other value, we need
// to preserve the end-state value without actually animating it
style[key] = defaultStyle[key] = extractValue(style[key]);
});
return { style, defaultStyle };
}
return {};
};
export default connect(mapStateToProps)(Motion);