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| import React from 'react';
import PropTypes from 'prop-types';
import { omit, uniqueId } from 'lodash';
/**
* List is container component used to help group list items.
* @category containers
* @component list-item
* @variations collab-ui-react
*/
class List extends React.Component {
static childContextTypes = {
setSelected: PropTypes.func,
handleListKeyDown: PropTypes.func
};
state = {
activeIndex: null,
focus: null,
id: this.props.id || uniqueId('cui-list-'),
last: 0,
};
getChildContext = () => {
return {
setSelected: (e, idx, value, label) => this.setSelected(e, idx, value, label),
handleListKeyDown: (e, idx) => this.handleListKeyDown(e, idx)
};
}
componentDidMount() {
const { focusFirst } = this.props;
focusFirst
&& this.determineInitialFocus();
}
determineInitialFocus = () => {
const nonDisabledIndex = React.Children
.toArray(this.props.children)
.reduceRight((agg, child, idx) => (
(!child.props.disabled && !child.props.isReadOnly)
? idx
: agg
), null);
this.setFocus(nonDisabledIndex);
}
setSelected = (e, index, value, label) => {
const { children, onSelect } = this.props;
const { activeIndex } = this.state;
this.setFocus(index);
// Don't do anything if onSelect Event Handler is present
if (onSelect) {
return onSelect(e, value, index, label);
}
// Don't do anything if index is the same or outside of the bounds
Iif (
index === activeIndex ||
index < 0 ||
index >= children.length
)
return;
// Keep reference to last index for event handler
const last = activeIndex;
// Call change event handler
this.setState({ activeIndex: index, last });
};
setFocus = index => {
this.setState({ focus: index });
};
getIncludesFirstCharacter = (str, char) =>
str
.charAt(0)
.toLowerCase()
.includes(char);
setFocusByFirstCharacter = (char, currentIdx, length) => {
const { children } = this.props;
const newIndex = React.Children
.toArray(children)
.reduce((agg, child, idx, arr) => {
const index = currentIdx + idx + 1 > length
? Math.abs(currentIdx + idx - length)
: currentIdx + idx + 1;
const label = arr[index].props.role === 'listItem' || arr[index].type.displayName === 'SelectOption'
? arr[index].props.label
: arr[index].props.header;
return (
!agg.length
&& !arr[index].props.disabled
&& !arr[index].props.isReadOnly
&& !['ListSeparator'].includes(arr[index].type.displayName)
&& this.getIncludesFirstCharacter(label, char)
)
? agg.concat(index)
: agg;
},
[]
);
!isNaN(newIndex[0]) && this.setFocus(newIndex[0]);
};
handleListKeyDown = (e, idx) => {
const {children} = this.props;
let newIndex, clickEvent;
const tgt = e.currentTarget;
const char = e.key;
let flag = false;
const length = React.Children.toArray(children).length - 1;
const getNewIndex = (currentIndex, change) => {
const getPossibleIndex = () => {
if (currentIndex + change < 0) {
return length;
} else if (currentIndex + change > length) {
return 0;
}
return currentIndex + change;
};
const possibleIndex = getPossibleIndex();
const potentialTarget = React.Children.toArray(this.props.children)[possibleIndex];
return (potentialTarget.props.disabled || potentialTarget.props.isReadOnly || potentialTarget.type.displayName === "ListSeparator")
? getNewIndex(possibleIndex, change)
: possibleIndex;
};
const isPrintableCharacter = str => {
return str.length === 1 && str.match(/\S/);
};
switch (e.which) {
case 32:
case 13:
try {
clickEvent = new MouseEvent('click', {
view: window,
bubbles: true,
cancelable: true,
});
} catch (err) {
if (document.createEvent) {
// DOM Level 3 for IE 9+
clickEvent = document.createEvent('MouseEvents');
clickEvent.initEvent('click', true, true);
}
}
tgt.dispatchEvent(clickEvent);
flag = true;
break;
case 38:
case 37:
newIndex = getNewIndex(idx, -1);
this.setFocus(newIndex);
flag = true;
break;
case 39:
case 40:
newIndex = getNewIndex(idx, 1);
this.setFocus(newIndex);
flag = true;
break;
case 33:
case 36:
this.setFocus(0);
flag = true;
break;
case 34:
case 35:
this.setFocus(length);
flag = true;
break;
default:
Eif (isPrintableCharacter(char)) {
this.setFocusByFirstCharacter(char, idx, length);
flag = true;
}
break;
}
Eif (flag) {
e.stopPropagation();
e.preventDefault();
}
};
render() {
const {
active,
children,
className,
isMulti,
itemRole,
role,
tabType,
type,
wrap,
...props
} = this.props;
const {
activeIndex,
focus,
id
} = this.state;
const { visibleClass } = this.context;
const otherProps = omit({...props}, ['focusFirst']);
const setListItems = React.Children.map(children, (child, idx) => {
const activeIndicator = (typeof active === 'number' || Array.isArray(active)) ? active : activeIndex;
switch (child.type.displayName) {
case 'ListItem':
case 'ListItemMeeting':
return React.cloneElement(child, {
active: idx === activeIndicator,
...type && {type: type},
focus: focus === idx,
itemIndex: idx,
role: itemRole,
id: `${id}__list-item`,
...focus === idx && { ref: ref => this.activeChild = ref }
});
case 'SpaceListItem':
return React.cloneElement(child, {
active: idx === activeIndicator,
focus: focus === idx,
itemIndex: idx,
role: itemRole,
id: `${id}__sl-item`,
...focus === idx && { ref: ref => this.activeChild = ref }
});
case 'SpaceListMeeting':
return React.cloneElement(child, {
active: idx === activeIndicator,
focus: focus === idx,
itemIndex: idx,
role: itemRole,
id: `${id}__sl-item`,
...focus === idx && { ref: ref => this.activeChild = ref }
});
case 'SelectOption':
return React.cloneElement(child, {
active: Array.isArray(activeIndicator) ? activeIndicator.includes(idx) : idx === activeIndicator,
focus: focus === idx,
itemIndex: idx,
role: itemRole,
isMulti: isMulti,
id: `${id}__so-item`,
...focus === idx && { ref: ref => this.activeChild = ref }
});
default:
return child;
}
});
const ActiveDescendantId = this.activeChild && this.activeChild.id;
/* eslint-disable jsx-a11y/aria-activedescendant-has-tabindex */
return (
<div
className={
'cui-list' +
` cui-list${tabType && `--${tabType}` || ''}` +
` cui-list${wrap && `--wrap` || ''}` +
`${(visibleClass && ` ${visibleClass}`) || ''}` +
`${(className && ` ${className}`) || ''}`
}
role={role}
aria-activedescendant={ActiveDescendantId}
{...otherProps}
>
{setListItems}
</div>
);
/* eslint-enable*/
}
}
List.propTypes = {
/** @prop Optional active prop to pass active prop to children | null */
active: PropTypes.oneOfType([
PropTypes.number,
PropTypes.array
]),
/** @prop Children nodes to render inside List | null */
children: PropTypes.node,
/** @prop Optional css class string | '' */
className: PropTypes.string,
/** @prop Sets first List item to have focus | true */
focusFirst: PropTypes.bool,
/** @prop Optional ID value of List | null */
id: PropTypes.string,
/** @prop Optional prop to know if multiple children can be active | false */
isMulti: PropTypes.bool,
/** @prop Optional tabType prop type to manually set child role | 'listItem' */
itemRole: PropTypes.string,
/** @prop Callback function invoked by user selecting an interactive item within List | null */
onSelect: PropTypes.func,
/** @prop Sets the ARIA role for the Nav, in the context of a TabContainer | 'list' */
role: PropTypes.string,
/** @prop Sets the orientation of the List | 'vertical' */
tabType: PropTypes.oneOf(['vertical', 'horizontal']),
/** @prop Sets List size | null */
type: PropTypes.oneOf(['small', 'large', 'space', 'xlarge']),
/** @prop Optional wrap prop type to wrap items to next row */
wrap: PropTypes.bool
};
List.defaultProps = {
active: null,
children: null,
className: '',
id: null,
isMulti: false,
itemRole: 'listItem',
focusFirst: true,
onSelect: null,
role: 'list',
tabType: 'vertical',
type: null,
wrap: false,
};
List.contextTypes = {
visibleClass: PropTypes.string
};
List.displayName = 'List';
export default List;
|