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185 changes: 185 additions & 0 deletions
185
app/javascript/flavours/glitch/components/dropdown_selector.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,185 @@ | ||
| import { useCallback, useEffect, useRef, useState } from 'react'; | ||
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| import classNames from 'classnames'; | ||
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| import { supportsPassiveEvents } from 'detect-passive-events'; | ||
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| import InfoIcon from '@/material-icons/400-24px/info.svg?react'; | ||
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| import type { IconProp } from './icon'; | ||
| import { Icon } from './icon'; | ||
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| const listenerOptions = supportsPassiveEvents | ||
| ? { passive: true, capture: true } | ||
| : true; | ||
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| interface SelectItem { | ||
| value: string; | ||
| icon?: string; | ||
| iconComponent?: IconProp; | ||
| text: string; | ||
| meta: string; | ||
| extra?: string; | ||
| } | ||
|
|
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| interface Props { | ||
| value: string; | ||
| classNamePrefix: string; | ||
| style?: React.CSSProperties; | ||
| items: SelectItem[]; | ||
| onChange: (value: string) => void; | ||
| onClose: () => void; | ||
| } | ||
|
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| export const DropdownSelector: React.FC<Props> = ({ | ||
| style, | ||
| items, | ||
| value, | ||
| classNamePrefix = 'privacy-dropdown', | ||
| onClose, | ||
| onChange, | ||
| }) => { | ||
| const nodeRef = useRef<HTMLUListElement>(null); | ||
| const focusedItemRef = useRef<HTMLLIElement>(null); | ||
| const [currentValue, setCurrentValue] = useState(value); | ||
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| const handleDocumentClick = useCallback( | ||
| (e: MouseEvent | TouchEvent) => { | ||
| if ( | ||
| nodeRef.current && | ||
| e.target instanceof Node && | ||
| !nodeRef.current.contains(e.target) | ||
| ) { | ||
| onClose(); | ||
| e.stopPropagation(); | ||
| } | ||
| }, | ||
| [nodeRef, onClose], | ||
| ); | ||
|
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| const handleClick = useCallback( | ||
| ( | ||
| e: React.MouseEvent<HTMLLIElement> | React.KeyboardEvent<HTMLLIElement>, | ||
| ) => { | ||
| const value = e.currentTarget.getAttribute('data-index'); | ||
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| e.preventDefault(); | ||
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| onClose(); | ||
| if (value) onChange(value); | ||
| }, | ||
| [onClose, onChange], | ||
| ); | ||
|
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| const handleKeyDown = useCallback( | ||
| (e: React.KeyboardEvent<HTMLLIElement>) => { | ||
| const value = e.currentTarget.getAttribute('data-index'); | ||
| const index = items.findIndex((item) => item.value === value); | ||
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| let element: Element | null | undefined = null; | ||
|
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| switch (e.key) { | ||
| case 'Escape': | ||
| onClose(); | ||
| break; | ||
| case ' ': | ||
| case 'Enter': | ||
| handleClick(e); | ||
| break; | ||
| case 'ArrowDown': | ||
| element = | ||
| nodeRef.current?.children[index + 1] ?? | ||
| nodeRef.current?.firstElementChild; | ||
| break; | ||
| case 'ArrowUp': | ||
| element = | ||
| nodeRef.current?.children[index - 1] ?? | ||
| nodeRef.current?.lastElementChild; | ||
| break; | ||
| case 'Tab': | ||
| if (e.shiftKey) { | ||
| element = | ||
| nodeRef.current?.children[index + 1] ?? | ||
| nodeRef.current?.firstElementChild; | ||
| } else { | ||
| element = | ||
| nodeRef.current?.children[index - 1] ?? | ||
| nodeRef.current?.lastElementChild; | ||
| } | ||
| break; | ||
| case 'Home': | ||
| element = nodeRef.current?.firstElementChild; | ||
| break; | ||
| case 'End': | ||
| element = nodeRef.current?.lastElementChild; | ||
| break; | ||
| } | ||
|
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| if (element && element instanceof HTMLElement) { | ||
| const selectedValue = element.getAttribute('data-index'); | ||
| element.focus(); | ||
| if (selectedValue) setCurrentValue(selectedValue); | ||
| e.preventDefault(); | ||
| e.stopPropagation(); | ||
| } | ||
| }, | ||
| [nodeRef, items, onClose, handleClick, setCurrentValue], | ||
| ); | ||
|
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| useEffect(() => { | ||
| document.addEventListener('click', handleDocumentClick, { capture: true }); | ||
| document.addEventListener('touchend', handleDocumentClick, listenerOptions); | ||
| focusedItemRef.current?.focus({ preventScroll: true }); | ||
|
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| return () => { | ||
| document.removeEventListener('click', handleDocumentClick, { | ||
| capture: true, | ||
| }); | ||
| document.removeEventListener( | ||
| 'touchend', | ||
| handleDocumentClick, | ||
| listenerOptions, | ||
| ); | ||
| }; | ||
| }, [handleDocumentClick]); | ||
|
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||
| return ( | ||
| <ul style={style} role='listbox' ref={nodeRef}> | ||
| {items.map((item) => ( | ||
| <li | ||
| role='option' | ||
| tabIndex={0} | ||
| key={item.value} | ||
| data-index={item.value} | ||
| onKeyDown={handleKeyDown} | ||
| onClick={handleClick} | ||
| className={classNames(`${classNamePrefix}__option`, { | ||
| active: item.value === currentValue, | ||
| })} | ||
| aria-selected={item.value === currentValue} | ||
| ref={item.value === currentValue ? focusedItemRef : null} | ||
| > | ||
| {item.icon && item.iconComponent && ( | ||
| <div className={`${classNamePrefix}__option__icon`}> | ||
| <Icon id={item.icon} icon={item.iconComponent} /> | ||
| </div> | ||
| )} | ||
|
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| <div className={`${classNamePrefix}__option__content`}> | ||
| <strong>{item.text}</strong> | ||
| {item.meta} | ||
| </div> | ||
|
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| {item.extra && ( | ||
| <div | ||
| className={`${classNamePrefix}__option__additional`} | ||
| title={item.extra} | ||
| > | ||
| <Icon id='info-circle' icon={InfoIcon} /> | ||
| </div> | ||
| )} | ||
| </li> | ||
| ))} | ||
| </ul> | ||
| ); | ||
| }; |
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