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Popper.js
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Popper.js
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import { Component, createElement } from 'react'
import PropTypes from 'prop-types'
import PopperJS from 'popper.js'
export const placements = PopperJS.placements
class Popper extends Component {
static contextTypes = {
popperManager: PropTypes.object,
}
static childContextTypes = {
popper: PropTypes.object.isRequired,
}
static propTypes = {
component: PropTypes.oneOfType([PropTypes.node, PropTypes.func]),
innerRef: PropTypes.func,
placement: PropTypes.oneOf(placements),
eventsEnabled: PropTypes.bool,
positionFixed: PropTypes.bool,
modifiers: PropTypes.object,
children: PropTypes.oneOfType([PropTypes.node, PropTypes.func]),
target: PropTypes.oneOfType([
// the following check is needed for SSR
PropTypes.instanceOf(typeof Element !== 'undefined' ? Element : Object),
PropTypes.shape({
getBoundingClientRect: PropTypes.func.isRequired,
clientWidth: PropTypes.number.isRequired,
clientHeight: PropTypes.number.isRequired,
}),
]),
}
static defaultProps = {
component: 'div',
placement: 'bottom',
eventsEnabled: true,
positionFixed: false,
modifiers: {},
}
state = {}
getChildContext() {
return {
popper: {
setArrowNode: this._setArrowNode,
getArrowStyle: this._getArrowStyle,
},
}
}
componentDidUpdate(lastProps) {
if (
lastProps.placement !== this.props.placement ||
lastProps.eventsEnabled !== this.props.eventsEnabled ||
lastProps.target !== this.props.target
) {
this._destroyPopper()
this._createPopper()
}
if (lastProps.children !== this.props.children) {
this._scheduleUpdate()
}
}
componentWillUnmount() {
this._destroyPopper()
}
_setArrowNode = node => {
this._arrowNode = node
}
_getTargetNode = () => {
if (this.props.target) {
return this.props.target
} else if (
!this.context.popperManager ||
!this.context.popperManager.getTargetNode()
) {
throw new Error(
'Target missing. Popper must be given a target from the Popper Manager, or as a prop.',
)
}
return this.context.popperManager.getTargetNode()
}
_getOffsets = data => {
return Object.keys(data.offsets).map(key => data.offsets[key])
}
_isDataDirty = data => {
if (this.state.data) {
return (
JSON.stringify(this._getOffsets(this.state.data)) !==
JSON.stringify(this._getOffsets(data))
)
} else {
return true
}
}
_updateStateModifier = {
enabled: true,
order: 900,
fn: data => {
if (this._isDataDirty(data)) {
this.setState({ data })
}
return data
},
}
_createPopper() {
const { placement, eventsEnabled, positionFixed } = this.props
const modifiers = {
...this.props.modifiers,
applyStyle: { enabled: false },
updateState: this._updateStateModifier,
}
if (this._arrowNode) {
modifiers.arrow = {
...(this.props.modifiers.arrow || {}),
element: this._arrowNode,
}
}
this._popper = new PopperJS(this._getTargetNode(), this._popperNode, {
placement,
positionFixed,
eventsEnabled,
modifiers,
})
// TODO: look into setTimeout scheduleUpdate call, without it, the popper will not position properly on creation
setTimeout(() => this._scheduleUpdate())
}
_destroyPopper() {
if (this._popper) {
this._popper.destroy()
}
}
_getPopperStyle = () => {
const { data } = this.state
if (!this._popper || !data) {
return {
position: 'absolute',
pointerEvents: 'none',
opacity: 0,
}
}
return {
position: data.offsets.popper.position,
...data.styles,
}
}
_getPopperPlacement = () => {
return this.state.data ? this.state.data.placement : undefined
}
_getPopperHide = () => {
return !!this.state.data && this.state.data.hide ? '' : undefined
}
_getArrowStyle = () => {
if (!this.state.data || !this.state.data.offsets.arrow) {
return {}
} else {
const { top, left } = this.state.data.offsets.arrow
return { top, left }
}
}
_handlePopperRef = node => {
this._popperNode = node
if (node) {
this._createPopper()
} else {
this._destroyPopper()
}
if (this.props.innerRef) {
this.props.innerRef(node)
}
}
_scheduleUpdate = () => {
this._popper && this._popper.scheduleUpdate()
}
render() {
const {
component,
innerRef,
placement,
eventsEnabled,
positionFixed,
modifiers,
children,
...restProps
} = this.props
const popperStyle = this._getPopperStyle()
const popperPlacement = this._getPopperPlacement()
const popperHide = this._getPopperHide()
if (typeof children === 'function') {
const popperProps = {
ref: this._handlePopperRef,
style: popperStyle,
'data-placement': popperPlacement,
'data-x-out-of-boundaries': popperHide,
}
return children({
popperProps,
restProps,
scheduleUpdate: this._scheduleUpdate,
})
}
const componentProps = {
...restProps,
style: {
...restProps.style,
...popperStyle,
},
'data-placement': popperPlacement,
'data-x-out-of-boundaries': popperHide,
}
if (typeof component === 'string') {
componentProps.ref = this._handlePopperRef
} else {
componentProps.innerRef = this._handlePopperRef
}
return createElement(component, componentProps, children)
}
}
export default Popper