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createContext,
useContext,
useState,
useRef,
useEffect,
ReactNode,
ReactElement,
Children,
cloneElement,
} from 'react';
import ReactDOM from 'react-dom';
import { CheckIcon, ChevronRightIcon, CircleIcon } from 'lucide-react';
import { cn } from '../lib/utils'; // Adjust path to your utility function
// Main dropdown context
interface DropdownContextValue {
open: boolean;
toggle: () => void;
close: () => void;
registerItem: (node: HTMLElement) => void;
focusNext: () => void;
focusPrev: () => void;
}
const DropdownContext = createContext<DropdownContextValue | null>(null);
// Submenu context
interface SubContextValue {
open: boolean;
toggle: () => void;
close: () => void;
keepOpen: () => void;
}
const SubContext = createContext<SubContextValue | null>(null);
interface DropdownMenuProps {
children: ReactNode;
}
function DropdownMenu({ children }: DropdownMenuProps) {
const [open, setOpen] = useState(false);
const itemsRef = useRef<HTMLElement[]>([]);
const rootRef = useRef<HTMLDivElement>(null);
useEffect(() => {
function onClick(e: MouseEvent) {
if (rootRef.current && !rootRef.current.contains(e.target as Node)) {
setOpen(false);
}
}
document.addEventListener('mousedown', onClick);
return () => document.removeEventListener('mousedown', onClick);
}, []);
const focusNext = () => {
const idx = itemsRef.current.findIndex(
(el) => el === document.activeElement
);
const next = itemsRef.current[idx + 1] || itemsRef.current[0];
next?.focus();
};
const focusPrev = () => {
const idx = itemsRef.current.findIndex(
(el) => el === document.activeElement
);
const prev =
itemsRef.current[idx - 1] ||
itemsRef.current[itemsRef.current.length - 1];
prev?.focus();
};
const registerItem = (node: HTMLElement) => {
if (node && !itemsRef.current.includes(node)) itemsRef.current.push(node);
};
return (
<div
ref={rootRef}
data-slot='dropdown-menu'
className='relative inline-block'
>
<DropdownContext.Provider
value={{
open,
toggle: () => setOpen((o) => !o),
close: () => setOpen(false),
registerItem,
focusNext,
focusPrev,
}}
>
{children}
</DropdownContext.Provider>
</div>
);
}
interface TriggerProps {
children: ReactNode;
className?: string;
asChild?: boolean;
}
function DropdownMenuTrigger({
children,
className,
asChild = false,
}: TriggerProps) {
const ctx = useContext(DropdownContext);
if (!ctx) throw new Error('DropdownMenuTrigger must be inside DropdownMenu');
const props = {
onClick: ctx.toggle,
'aria-expanded': ctx.open,
'data-slot': 'dropdown-menu-trigger',
className: cn(
'inline-flex items-center justify-center rounded-md px-3 py-2 text-sm font-medium transition-colors focus:outline-none focus:ring-2 focus:ring-offset-2 hover:bg-accent hover:text-accent-foreground',
className
),
};
if (asChild) {
const child = Children.only(children) as ReactElement;
return cloneElement(child, props);
}
return (
<button type='button' {...props}>
{children}
</button>
);
}
interface ContentProps {
children: ReactNode;
className?: string;
sideOffset?: number;
asChild?: boolean;
}
function DropdownMenuContent({
children,
className,
sideOffset = 4,
asChild = false,
}: ContentProps) {
const ctx = useContext(DropdownContext);
if (!ctx) throw new Error('DropdownMenuContent must be inside DropdownMenu');
if (!ctx.open) return null;
const content = (
<div
data-slot='dropdown-menu-content'
data-side='bottom'
className={cn(
'absolute top-full left-0',
'bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out',
'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0',
'data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95',
'data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2',
'data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2',
'z-50 max-h-[var(--radix-dropdown-menu-content-available-height)] min-w-[8rem]',
'origin-[var(--radix-dropdown-menu-content-transform-origin)] overflow-x-hidden overflow-y-auto',
'rounded-md border p-1 shadow-md',
className
)}
style={{ marginTop: sideOffset }}
>
{children}
</div>
);
return asChild
? cloneElement(Children.only(children) as ReactElement, content.props)
: content;
}
interface PortalProps {
children: ReactNode;
}
function DropdownMenuPortal({ children }: PortalProps) {
return ReactDOM.createPortal(
<div data-slot='dropdown-menu-portal'>{children}</div>,
document.body
);
}
interface GroupProps {
children: ReactNode;
className?: string;
}
function DropdownMenuGroup({ children, className }: GroupProps) {
return (
<div
data-slot='dropdown-menu-group'
role='group'
className={cn('py-1', className)}
>
{children}
</div>
);
}
interface ItemProps {
children: ReactNode;
onSelect?: () => void;
disabled?: boolean;
variant?: 'default' | 'destructive';
className?: string;
inset?: boolean;
}
function DropdownMenuItem({
children,
onSelect,
disabled,
variant = 'default',
className,
inset = false,
}: ItemProps) {
const ctx = useContext(DropdownContext);
if (!ctx) throw new Error('DropdownMenuItem must be inside DropdownMenu');
const ref = useRef<HTMLDivElement>(null);
useEffect(() => {
if (ref.current) ctx.registerItem(ref.current);
}, [ctx]);
const handleKey = (e: React.KeyboardEvent) => {
switch (e.key) {
case 'Enter':
case ' ':
e.preventDefault();
if (!disabled) onSelect?.();
ctx.close();
break;
case 'ArrowDown':
ctx.focusNext();
break;
case 'ArrowUp':
ctx.focusPrev();
break;
case 'Escape':
ctx.close();
break;
}
};
return (
<div
role='menuitem'
tabIndex={disabled ? -1 : 0}
ref={ref}
onClick={() => {
if (!disabled) {
onSelect?.();
ctx.close();
}
}}
onKeyDown={handleKey}
data-slot='dropdown-menu-item'
data-inset={inset}
data-variant={variant}
data-disabled={disabled}
className={cn(
'relative flex cursor-default items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none select-none',
'hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground transition-colors',
variant === 'destructive' &&
'text-destructive hover:bg-destructive/10 focus:bg-destructive/10 dark:data-[variant=destructive]:hover:bg-destructive/20 dark:data-[variant=destructive]:focus:bg-destructive/20',
'data-[disabled]:pointer-events-none data-[disabled]:opacity-50',
inset && 'pl-8',
"[&_svg:not([class*='text-'])]:text-muted-foreground",
"[&_svg]:pointer-events-none [&_svg]:shrink-0 [&_svg:not([class*='size-'])]:size-4",
className
)}
>
{children}
</div>
);
}
interface CheckboxItemProps {
children: ReactNode;
checked: boolean;
onChange: (value: boolean) => void;
}
function DropdownMenuCheckboxItem({
children,
checked,
onChange,
}: CheckboxItemProps) {
return (
<DropdownMenuItem inset onSelect={() => onChange(!checked)}>
<span className='pointer-events-none absolute left-2 flex size-3.5 items-center'>
{checked && <CheckIcon className='size-4' />}
</span>
{children}
</DropdownMenuItem>
);
}
interface RadioGroupProps {
children: ReactNode;
}
function DropdownMenuRadioGroup({ children }: RadioGroupProps) {
return (
<div data-slot='dropdown-menu-radio-group' role='group'>
{children}
</div>
);
}
interface RadioItemProps {
children: ReactNode;
checked: boolean;
onSelect: () => void;
}
function DropdownMenuRadioItem({
children,
checked,
onSelect,
}: RadioItemProps) {
return (
<DropdownMenuItem inset onSelect={onSelect}>
<span className='pointer-events-none absolute left-2 flex size-3.5 items-center'>
{checked ? (
<CircleIcon className='size-2 fill-current' />
) : (
<span className='size-2' />
)}
</span>
{children}
</DropdownMenuItem>
);
}
function DropdownMenuSeparator() {
return (
<div
data-slot='dropdown-menu-separator'
className={cn('bg-border -mx-1 my-1 h-px')}
/>
);
}
interface LabelProps {
children: ReactNode;
inset?: boolean;
}
function DropdownMenuLabel({ children, inset }: LabelProps) {
return (
<div
data-slot='dropdown-menu-label'
data-inset={inset}
className={cn('px-2 py-1.5 text-sm font-medium', inset && 'pl-8')}
>
{children}
</div>
);
}
interface ShortcutProps {
children: ReactNode;
className?: string;
}
function DropdownMenuShortcut({ children, className }: ShortcutProps) {
return (
<span
data-slot='dropdown-menu-shortcut'
className={cn(
'text-muted-foreground ml-auto text-xs tracking-widest',
className
)}
>
{children}
</span>
);
}
interface SubProps {
children: ReactNode;
}
function DropdownMenuSub({ children }: SubProps) {
const [open, setOpen] = useState(false);
const rootRef = useRef<HTMLDivElement>(null);
const timeoutId = useRef<NodeJS.Timeout | null>(null);
const clearTimeoutId = () => {
if (timeoutId.current) {
clearTimeout(timeoutId.current);
timeoutId.current = null;
}
};
useEffect(() => {
function onClick(e: MouseEvent) {
if (rootRef.current && !rootRef.current.contains(e.target as Node)) {
setOpen(false);
clearTimeoutId();
}
}
document.addEventListener('mousedown', onClick);
return () => {
document.removeEventListener('mousedown', onClick);
clearTimeoutId();
};
}, []);
return (
<div ref={rootRef} data-slot='dropdown-menu-sub' className='relative'>
<SubContext.Provider
value={{
open,
toggle: () => {
setOpen((o) => !o);
clearTimeoutId();
},
close: () => {
timeoutId.current = setTimeout(() => {
setOpen(false);
clearTimeoutId();
}, 100); // 100ms delay for hover transition
},
keepOpen: () => {
clearTimeoutId();
setOpen(true);
},
}}
>
{children}
</SubContext.Provider>
</div>
);
}
interface SubTriggerProps {
children: ReactNode;
inset?: boolean;
className?: string;
asChild?: boolean;
}
function DropdownMenuSubTrigger({
children,
inset,
className,
asChild = false,
}: SubTriggerProps) {
const ctx = useContext(SubContext);
if (!ctx) throw new Error('SubTrigger must be inside DropdownMenuSub');
const props = {
onMouseEnter: () => {
ctx.toggle();
},
onMouseLeave: () => {
ctx.close();
},
onClick: ctx.toggle,
'data-slot': 'dropdown-menu-sub-trigger',
'data-inset': inset,
className: cn(
'flex cursor-default select-none items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none',
'hover:bg-accent hover:text-accent-foreground focus:bg-accent focus:text-accent-foreground transition-colors',
inset && 'pl-8',
className
),
};
if (asChild) {
const child = Children.only(children) as ReactElement;
return cloneElement(child, props);
}
return (
<div {...props}>
{children}
<ChevronRightIcon className='ml-auto size-4' />
</div>
);
}
interface SubContentProps {
children: ReactNode;
className?: string;
asChild?: boolean;
}
function DropdownMenuSubContent({
children,
className,
asChild = false,
}: SubContentProps) {
const subCtx = useContext(SubContext);
const dropdownCtx = useContext(DropdownContext);
const [position, setPosition] = useState<{ top: number; left: number }>({
top: 0,
left: 0,
});
useEffect(() => {
if (dropdownCtx?.open && subCtx?.open) {
const contentEl = document.querySelector(
'[data-slot="dropdown-menu-content"]'
);
const triggerEl = document.querySelector(
'[data-slot="dropdown-menu-sub-trigger"]'
);
if (contentEl && triggerEl) {
const contentRect = contentEl.getBoundingClientRect();
const triggerRect = triggerEl.getBoundingClientRect();
setPosition({
top: triggerRect.top,
left: contentRect.right + 4,
});
}
}
}, [dropdownCtx?.open, subCtx?.open]);
if (!subCtx || !dropdownCtx)
throw new Error('SubContent must be inside DropdownMenuSub');
if (!subCtx.open) return null;
const content = (
<div
data-slot='dropdown-menu-sub-content'
data-side='right'
className={cn(
'fixed',
'bg-popover text-popover-foreground data-[state=open]:animate-in data-[state=closed]:animate-out',
'data-[state=closed]:fade-out-0 data-[state=open]:fade-in-0',
'data-[state=closed]:zoom-out-95 data-[state=open]:zoom-in-95',
'data-[side=bottom]:slide-in-from-top-2 data-[side=left]:slide-in-from-right-2',
'data-[side=right]:slide-in-from-left-2 data-[side=top]:slide-in-from-bottom-2',
'z-50 max-h-[var(--radix-dropdown-menu-content-available-height)] min-w-[8rem]',
'origin-[var(--radix-dropdown-menu-content-transform-origin)] overflow-x-hidden overflow-y-auto',
'rounded-md border p-1 shadow-md',
className
)}
style={{
top: `${position.top}px`,
left: `${position.left}px`,
}}
onMouseEnter={() => subCtx.keepOpen()}
onMouseLeave={() => subCtx.close()}
>
{children}
</div>
);
return asChild
? cloneElement(Children.only(children) as ReactElement, content.props)
: content;
}
export {
DropdownMenu,
DropdownMenuPortal,
DropdownMenuTrigger,
DropdownMenuContent,
DropdownMenuGroup,
DropdownMenuLabel,
DropdownMenuItem,
DropdownMenuCheckboxItem,
DropdownMenuRadioGroup,
DropdownMenuRadioItem,
DropdownMenuSeparator,
DropdownMenuShortcut,
DropdownMenuSub,
DropdownMenuSubTrigger,
DropdownMenuSubContent,
};
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