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whippy-edition/app/javascript/mastodon/components/dropdown_menu.js

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JavaScript
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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/lib/Overlay';
import Motion from '../features/ui/util/optional_motion';
import spring from 'react-motion/lib/spring';
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;
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class DropdownMenu extends React.PureComponent {
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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,
placement: PropTypes.string,
arrowOffsetLeft: PropTypes.string,
arrowOffsetTop: PropTypes.string,
openedViaKeyboard: PropTypes.bool,
renderItem: PropTypes.func,
renderHeader: PropTypes.func,
onItemClick: PropTypes.func.isRequired,
};
static defaultProps = {
style: {},
placement: 'bottom',
};
state = {
mounted: false,
};
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 });
}
this.setState({ mounted: true });
}
componentWillUnmount () {
document.removeEventListener('click', this.handleDocumentClick, false);
document.removeEventListener('keydown', this.handleKeyDown, false);
document.removeEventListener('touchend', this.handleDocumentClick, listenerOptions);
}
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setRef = c => {
this.node = c;
}
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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, style, placement, arrowOffsetLeft, arrowOffsetTop, scrollable, renderHeader, loading } = this.props;
const { mounted } = this.state;
let renderItem = this.props.renderItem || this.renderItem;
return (
<Motion defaultStyle={{ opacity: 0, scaleX: 0.85, scaleY: 0.75 }} style={{ opacity: spring(1, { damping: 35, stiffness: 400 }), scaleX: spring(1, { damping: 35, stiffness: 400 }), scaleY: spring(1, { damping: 35, stiffness: 400 }) }}>
{({ opacity, scaleX, scaleY }) => (
// It should not be transformed when mounting because the resulting
// size will be used to determine the coordinate of the menu by
// react-overlays
<div className={`dropdown-menu ${placement}`} style={{ ...style, opacity: opacity, transform: mounted ? `scale(${scaleX}, ${scaleY})` : null }} ref={this.setRef}>
<div className={`dropdown-menu__arrow ${placement}`} style={{ left: arrowOffsetLeft, top: arrowOffsetTop }} />
<div className={classNames('dropdown-menu__container', { 'dropdown-menu__container--loading': loading })}>
{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>
</div>
)}
</Motion>
);
}
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}
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,
dropdownPlacement: PropTypes.string,
openDropdownId: PropTypes.number,
openedViaKeyboard: PropTypes.bool,
renderItem: PropTypes.func,
renderHeader: PropTypes.func,
onItemClick: PropTypes.func,
};
static defaultProps = {
title: 'Menu',
};
state = {
id: id++,
};
handleClick = ({ target, type }) => {
if (this.state.id === this.props.openDropdownId) {
this.handleClose();
} else {
const { top } = target.getBoundingClientRect();
const placement = top * 2 < innerHeight ? 'bottom' : 'top';
this.props.onOpen(this.state.id, this.handleItemClick, placement, 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];
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this.handleClose();
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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);
}
}
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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,
dropdownPlacement,
openDropdownId,
openedViaKeyboard,
children,
renderItem,
renderHeader,
} = this.props;
const open = this.state.id === openDropdownId;
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const button = children ? React.cloneElement(React.Children.only(children), {
ref: this.setTargetRef,
onClick: this.handleClick,
onMouseDown: this.handleMouseDown,
onKeyDown: this.handleButtonKeyDown,
onKeyPress: this.handleKeyPress,
}) : (
<IconButton
icon={icon}
title={title}
active={open}
disabled={disabled}
size={size}
ref={this.setTargetRef}
onClick={this.handleClick}
onMouseDown={this.handleMouseDown}
onKeyDown={this.handleButtonKeyDown}
onKeyPress={this.handleKeyPress}
/>
);
return (
<React.Fragment>
{button}
<Overlay show={open} placement={dropdownPlacement} target={this.findTarget}>
<DropdownMenu
items={items}
loading={loading}
scrollable={scrollable}
onClose={this.handleClose}
openedViaKeyboard={openedViaKeyboard}
renderItem={renderItem}
renderHeader={renderHeader}
onItemClick={this.handleItemClick}
/>
</Overlay>
</React.Fragment>
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);
}
}