Fix reduced motion breaking public galleries (#5423)

This commit is contained in:
Nolan Lawson 2017-10-16 12:08:01 -07:00 committed by Eugen Rochko
parent 34118169ac
commit 8980aa804f
2 changed files with 42 additions and 19 deletions

View file

@ -1,34 +1,56 @@
// Like react-motion's Motion, but checks to see if the user prefers
// reduced motion and uses a cross-fade in those cases.
import React from 'react';
import Motion from 'react-motion/lib/Motion';
import { connect } from 'react-redux';
import PropTypes from 'prop-types';
const stylesToKeep = ['opacity', 'backgroundOpacity'];
let reduceMotion;
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']);
class OptionalMotion extends React.Component {
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 };
static propTypes = {
defaultStyle: PropTypes.object,
style: PropTypes.object,
children: PropTypes.func,
}
return {};
};
export default connect(mapStateToProps)(Motion);
render() {
const { style, defaultStyle, children } = this.props;
if (typeof reduceMotion !== 'boolean') {
// This never changes without a page reload, so we can just grab it
// once from the body classes as opposed to using Redux's connect(),
// which would unnecessarily update every state change
reduceMotion = document.body.classList.contains('reduce-motion');
}
if (reduceMotion) {
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 (
<Motion style={style} defaultStyle={defaultStyle}>
{children}
</Motion>
);
}
}
export default OptionalMotion;

View file

@ -27,6 +27,7 @@
= yield :header_tags
- body_classes ||= @body_classes || ''
- body_classes += ' reduce-motion' if current_account&.user&.setting_reduce_motion
- body_classes += ' system-font' if current_account&.user&.setting_system_font_ui
%body{ class: add_rtl_body_class(body_classes) }