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focus-ripple.jsx
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focus-ripple.jsx
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const React = require('react/addons');
const PureRenderMixin = React.addons.PureRenderMixin;
const StylePropable = require('../mixins/style-propable');
const AutoPrefix = require('../styles/auto-prefix');
const Colors = require('../styles/colors');
const Transitions = require('../styles/transitions');
const ScaleInTransitionGroup = require('../transition-groups/scale-in');
const pulsateDuration = 750;
const FocusRipple = React.createClass({
mixins: [PureRenderMixin, StylePropable],
propTypes: {
color: React.PropTypes.string,
innerStyle: React.PropTypes.object,
opacity: React.PropTypes.number,
show: React.PropTypes.bool,
},
getDefaultProps() {
return {
color: Colors.darkBlack,
};
},
componentDidMount() {
if (this.props.show) {
this._setRippleSize();
this._pulsate();
}
},
componentDidUpdate() {
if (this.props.show) {
this._setRippleSize();
this._pulsate();
} else {
if (this._timeout) clearTimeout(this._timeout);
}
},
render() {
const {
show,
style,
} = this.props;
const mergedRootStyles = this.mergeStyles({
height: '100%',
width: '100%',
position: 'absolute',
top: 0,
left: 0,
}, style);
const ripple = show ? this._getRippleElement(this.props) : null;
return (
<ScaleInTransitionGroup
maxScale={0.85}
style={mergedRootStyles}>
{ripple}
</ScaleInTransitionGroup>
);
},
_getRippleElement(props) {
const {
color,
innerStyle,
opacity,
} = props;
const innerStyles = this.mergeAndPrefix({
position: 'absolute',
height: '100%',
width: '100%',
borderRadius: '50%',
opacity: opacity ? opacity : 0.16,
backgroundColor: color,
transition: Transitions.easeOut(pulsateDuration + 'ms', 'transform', null, Transitions.easeInOutFunction),
}, innerStyle);
return <div ref="innerCircle" style={innerStyles} />;
},
_pulsate() {
if (!this.isMounted()) return;
let innerCircle = React.findDOMNode(this.refs.innerCircle);
if (!innerCircle) return;
const startScale = 'scale(1)';
const endScale = 'scale(0.85)';
let currentScale = innerCircle.style[AutoPrefix.single('transform')];
let nextScale;
currentScale = currentScale || startScale;
nextScale = currentScale === startScale ?
endScale : startScale;
innerCircle.style[AutoPrefix.single('transform')] = nextScale;
this._timeout = setTimeout(this._pulsate, pulsateDuration);
},
_setRippleSize() {
let el = React.findDOMNode(this.refs.innerCircle);
const height = el.offsetHeight;
const width = el.offsetWidth;
const size = Math.max(height, width);
el.style.height = size + 'px';
el.style.top = (size / 2 * -1) + (height / 2) + 'px';
},
});
module.exports = FocusRipple;