import React from 'react'; import PropTypes from 'prop-types'; import ImmutablePropTypes from 'react-immutable-proptypes'; import { IconButton } from './icon_button'; import Overlay from 'react-overlays/Overlay'; import { supportsPassiveEvents } from 'detect-passive-events'; import classNames from 'classnames'; import { CircularProgress } from 'mastodon/components/loading_indicator'; const listenerOptions = supportsPassiveEvents ? { passive: true } : false; let id = 0; class DropdownMenu extends React.PureComponent { static contextTypes = { router: PropTypes.object, }; static propTypes = { items: PropTypes.oneOfType([PropTypes.array, ImmutablePropTypes.list]).isRequired, loading: PropTypes.bool, scrollable: PropTypes.bool, onClose: PropTypes.func.isRequired, style: PropTypes.object, openedViaKeyboard: PropTypes.bool, renderItem: PropTypes.func, renderHeader: PropTypes.func, onItemClick: PropTypes.func.isRequired, }; static defaultProps = { style: {}, }; handleDocumentClick = e => { if (this.node && !this.node.contains(e.target)) { this.props.onClose(); } }; componentDidMount () { document.addEventListener('click', this.handleDocumentClick, false); document.addEventListener('keydown', this.handleKeyDown, false); document.addEventListener('touchend', this.handleDocumentClick, listenerOptions); if (this.focusedItem && this.props.openedViaKeyboard) { this.focusedItem.focus({ preventScroll: true }); } } componentWillUnmount () { document.removeEventListener('click', this.handleDocumentClick, false); document.removeEventListener('keydown', this.handleKeyDown, false); document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions); } setRef = c => { this.node = c; }; setFocusRef = c => { this.focusedItem = c; }; handleKeyDown = e => { const items = Array.from(this.node.querySelectorAll('a, button')); const index = items.indexOf(document.activeElement); let element = null; switch(e.key) { case 'ArrowDown': element = items[index+1] || items[0]; break; case 'ArrowUp': element = items[index-1] || items[items.length-1]; break; case 'Tab': if (e.shiftKey) { element = items[index-1] || items[items.length-1]; } else { element = items[index+1] || items[0]; } break; case 'Home': element = items[0]; break; case 'End': element = items[items.length-1]; break; case 'Escape': this.props.onClose(); break; } if (element) { element.focus(); e.preventDefault(); e.stopPropagation(); } }; handleItemKeyPress = e => { if (e.key === 'Enter' || e.key === ' ') { this.handleClick(e); } }; handleClick = e => { const { onItemClick } = this.props; onItemClick(e); }; renderItem = (option, i) => { if (option === null) { return <li key={`sep-${i}`} className='dropdown-menu__separator' />; } const { text, href = '#', target = '_blank', method } = option; return ( <li className='dropdown-menu__item' key={`${text}-${i}`}> <a href={href} target={target} data-method={method} rel='noopener noreferrer' role='button' tabIndex={0} ref={i === 0 ? this.setFocusRef : null} onClick={this.handleClick} onKeyPress={this.handleItemKeyPress} data-index={i}> {text} </a> </li> ); }; render () { const { items, scrollable, renderHeader, loading } = this.props; let renderItem = this.props.renderItem || this.renderItem; return ( <div className={classNames('dropdown-menu__container', { 'dropdown-menu__container--loading': loading })} ref={this.setRef}> {loading && ( <CircularProgress size={30} strokeWidth={3.5} /> )} {!loading && renderHeader && ( <div className='dropdown-menu__container__header'> {renderHeader(items)} </div> )} {!loading && ( <ul className={classNames('dropdown-menu__container__list', { 'dropdown-menu__container__list--scrollable': scrollable })}> {items.map((option, i) => renderItem(option, i, { onClick: this.handleClick, onKeyPress: this.handleItemKeyPress }))} </ul> )} </div> ); } } export default class Dropdown extends React.PureComponent { static contextTypes = { router: PropTypes.object, }; static propTypes = { children: PropTypes.node, icon: PropTypes.string, items: PropTypes.oneOfType([PropTypes.array, ImmutablePropTypes.list]).isRequired, loading: PropTypes.bool, size: PropTypes.number, title: PropTypes.string, disabled: PropTypes.bool, scrollable: PropTypes.bool, status: ImmutablePropTypes.map, isUserTouching: PropTypes.func, onOpen: PropTypes.func.isRequired, onClose: PropTypes.func.isRequired, openDropdownId: PropTypes.number, openedViaKeyboard: PropTypes.bool, renderItem: PropTypes.func, renderHeader: PropTypes.func, onItemClick: PropTypes.func, }; static defaultProps = { title: 'Menu', }; state = { id: id++, }; handleClick = ({ type }) => { if (this.state.id === this.props.openDropdownId) { this.handleClose(); } else { this.props.onOpen(this.state.id, this.handleItemClick, type !== 'click'); } }; handleClose = () => { if (this.activeElement) { this.activeElement.focus({ preventScroll: true }); this.activeElement = null; } this.props.onClose(this.state.id); }; handleMouseDown = () => { if (!this.state.open) { this.activeElement = document.activeElement; } }; handleButtonKeyDown = (e) => { switch(e.key) { case ' ': case 'Enter': this.handleMouseDown(); break; } }; handleKeyPress = (e) => { switch(e.key) { case ' ': case 'Enter': this.handleClick(e); e.stopPropagation(); e.preventDefault(); break; } }; handleItemClick = e => { const { onItemClick } = this.props; const i = Number(e.currentTarget.getAttribute('data-index')); const item = this.props.items[i]; this.handleClose(); if (typeof onItemClick === 'function') { e.preventDefault(); onItemClick(item, i); } else if (item && typeof item.action === 'function') { e.preventDefault(); item.action(); } else if (item && item.to) { e.preventDefault(); this.context.router.history.push(item.to); } }; setTargetRef = c => { this.target = c; }; findTarget = () => { return this.target; }; componentWillUnmount = () => { if (this.state.id === this.props.openDropdownId) { this.handleClose(); } }; close = () => { this.handleClose(); }; render () { const { icon, items, size, title, disabled, loading, scrollable, openDropdownId, openedViaKeyboard, children, renderItem, renderHeader, } = this.props; const open = this.state.id === openDropdownId; const button = children ? React.cloneElement(React.Children.only(children), { onClick: this.handleClick, onMouseDown: this.handleMouseDown, onKeyDown: this.handleButtonKeyDown, onKeyPress: this.handleKeyPress, }) : ( <IconButton icon={icon} title={title} active={open} disabled={disabled} size={size} onClick={this.handleClick} onMouseDown={this.handleMouseDown} onKeyDown={this.handleButtonKeyDown} onKeyPress={this.handleKeyPress} /> ); return ( <React.Fragment> <span ref={this.setTargetRef}> {button} </span> <Overlay show={open} offset={[5, 5]} placement={'bottom'} flip target={this.findTarget} popperConfig={{ strategy: 'fixed' }}> {({ props, arrowProps, placement }) => ( <div {...props}> <div className={`dropdown-animation dropdown-menu ${placement}`}> <div className={`dropdown-menu__arrow ${placement}`} {...arrowProps} /> <DropdownMenu items={items} loading={loading} scrollable={scrollable} onClose={this.handleClose} openedViaKeyboard={openedViaKeyboard} renderItem={renderItem} renderHeader={renderHeader} onItemClick={this.handleItemClick} /> </div> </div> )} </Overlay> </React.Fragment> ); } }