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// Package imports.
import PropTypes from 'prop-types';
import React from 'react';
import spring from 'react-motion/lib/spring';
import ImmutablePureComponent from 'react-immutable-pure-component';
import classNames from 'classnames';
// Components.
import Icon from 'flavours/glitch/components/icon';
// Utils.
import { withPassive } from 'flavours/glitch/utils/dom_helpers';
import Motion from '../../ui/util/optional_motion';
import { assignHandlers } from 'flavours/glitch/utils/react_helpers';
// The spring to use with our motion.
const springMotion = spring(1, {
damping: 35,
stiffness: 400,
});
// The component.
export default class ComposerOptionsDropdownContent extends React.PureComponent {
static propTypes = {
items: PropTypes.arrayOf(PropTypes.shape({
icon: PropTypes.string,
meta: PropTypes.node,
name: PropTypes.string.isRequired,
text: PropTypes.node,
})),
onChange: PropTypes.func.isRequired,
onClose: PropTypes.func.isRequired,
style: PropTypes.object,
value: PropTypes.string,
renderItemContents: PropTypes.func,
openedViaKeyboard: PropTypes.bool,
closeOnChange: PropTypes.bool,
};
static defaultProps = {
style: {},
closeOnChange: true,
};
state = {
mounted: false,
value: this.props.openedViaKeyboard ? this.props.items[0].name : undefined,
};
// When the document is clicked elsewhere, we close the dropdown.
handleDocumentClick = (e) => {
if (this.node && !this.node.contains(e.target)) {
this.props.onClose();
}
}
// Stores our node in `this.node`.
handleRef = (node) => {
this.node = node;
}
// On mounting, we add our listeners.
componentDidMount () {
document.addEventListener('click', this.handleDocumentClick, false);
document.addEventListener('touchend', this.handleDocumentClick, withPassive);
if (this.focusedItem) {
this.focusedItem.focus({ preventScroll: true });
} else {
this.node.firstChild.focus({ preventScroll: true });
}
this.setState({ mounted: true });
}
// On unmounting, we remove our listeners.
componentWillUnmount () {
document.removeEventListener('click', this.handleDocumentClick, false);
document.removeEventListener('touchend', this.handleDocumentClick, withPassive);
}
handleClick = (e) => {
const i = Number(e.currentTarget.getAttribute('data-index'));
const {
onChange,
onClose,
closeOnChange,
items,
} = this.props;
const { name } = this.props.items[i];
e.preventDefault(); // Prevents change in focus on click
if (closeOnChange) {
onClose();
}
onChange(name);
}
// Handle changes differently whether the dropdown is a list of options or actions
handleChange = (name) => {
if (this.props.value) {
this.props.onChange(name);
} else {
this.setState({ value: name });
}
}
handleKeyDown = (e) => {
const index = Number(e.currentTarget.getAttribute('data-index'));
const { items } = this.props;
let element = null;
switch(e.key) {
case 'Escape':
this.props.onClose();
break;
case 'Enter':
case ' ':
this.handleClick(e);
break;
case 'ArrowDown':
element = this.node.childNodes[index + 1] || this.node.firstChild;
break;
case 'ArrowUp':
element = this.node.childNodes[index - 1] || this.node.lastChild;
break;
case 'Tab':
if (e.shiftKey) {
element = this.node.childNodes[index - 1] || this.node.lastChild;
} else {
element = this.node.childNodes[index + 1] || this.node.firstChild;
}
break;
case 'Home':
element = this.node.firstChild;
break;
case 'End':
element = this.node.lastChild;
break;
}
if (element) {
element.focus();
this.handleChange(this.props.items[Number(element.getAttribute('data-index'))].name);
e.preventDefault();
e.stopPropagation();
}
}
setFocusRef = c => {
this.focusedItem = c;
}
renderItem = (item, i) => {
const { name, icon, meta, text } = item;
const active = (name === (this.props.value || this.state.value));
const computedClass = classNames('composer--options--dropdown--content--item', { active });
let contents = this.props.renderItemContents && this.props.renderItemContents(item, i);
if (!contents) {
contents = (
<React.Fragment>
{icon && <Icon className='icon' fixedWidth id={icon} />}
<div className='content'>
<strong>{text}</strong>
{meta}
</div>
</React.Fragment>
);
}
return (
<div
className={computedClass}
onClick={this.handleClick}
onKeyDown={this.handleKeyDown}
role='option'
tabIndex='0'
key={name}
data-index={i}
ref={active ? this.setFocusRef : null}
>
{contents}
</div>
);
}
// Rendering.
render () {
const { mounted } = this.state;
const {
items,
onChange,
onClose,
style,
} = this.props;
// The result.
return (
<Motion
defaultStyle={{
opacity: 0,
scaleX: 0.85,
scaleY: 0.75,
}}
style={{
opacity: springMotion,
scaleX: springMotion,
scaleY: springMotion,
}}
>
{({ 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='composer--options--dropdown--content'
ref={this.handleRef}
role='listbox'
style={{
...style,
opacity: opacity,
transform: mounted ? `scale(${scaleX}, ${scaleY})` : null,
}}
>
{!!items && items.map((item, i) => this.renderItem(item, i))}
</div>
)}
</Motion>
);
}
}