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cloneElement,
isValidElement,
useCallback,
useEffect,
useId,
useRef,
useState,
type JSX,
type ReactElement,
type ReactNode,
} from "react";
import { createPortal } from "react-dom";
import { type TooltipBuiltinProps, type TooltipPlacement } from "@grackle-ai/common";
import styles from "./Tooltip.module.scss";
// `text`/`placement`/`delayMs` now live in the built-in's zod schema
// (@grackle-ai/common); re-export TooltipPlacement so the package barrel keeps
// exposing it.
export type { TooltipPlacement };
/** Props for the {@link Tooltip} component. */
export interface TooltipProps extends TooltipBuiltinProps {
/** Whether the wrapper is inline (`span`) or block (`div`). Defaults to `true`. */
inline?: boolean;
/** The trigger element to wrap. */
children: ReactNode;
/** Additional CSS class for the wrapper element. */
className?: string;
/** Test ID for the tooltip content element. */
"data-testid"?: string;
}
/** Default delay in milliseconds before the tooltip appears. */
const DEFAULT_DELAY_MS: number = 300;
/** Gap in pixels between the tooltip and the trigger element. */
const TOOLTIP_GAP_PX: number = 6;
/**
* Lightweight tooltip wrapper that shows text on hover or keyboard focus.
*
* Wraps a single child element with a hover/focus-triggered tooltip.
* Renders the tooltip bubble via a portal to `document.body` so it escapes
* all stacking contexts, `overflow: hidden`, and `backdrop-filter` traps.
*/
export function Tooltip({
text,
placement = "top",
delayMs = DEFAULT_DELAY_MS,
inline = true,
children,
className,
"data-testid": testId,
}: TooltipProps): JSX.Element {
const [visible, setVisible] = useState(false);
const [coords, setCoords] = useState<{ top: number; left: number }>({ top: 0, left: 0 });
const wrapperRef = useRef<HTMLElement>(null);
const tooltipRef = useRef<HTMLDivElement>(null);
const timerRef = useRef<ReturnType<typeof setTimeout> | undefined>(undefined);
const tooltipId = useId();
const canPortal = typeof document !== "undefined";
const computePosition = useCallback((): void => {
Iif (!wrapperRef.current || !tooltipRef.current) {
return;
}
const rect = wrapperRef.current.getBoundingClientRect();
const tipRect = tooltipRef.current.getBoundingClientRect();
let top = 0;
let left = 0;
switch (placement) {
case "top":
top = rect.top - tipRect.height - TOOLTIP_GAP_PX;
left = rect.left + rect.width / 2 - tipRect.width / 2;
break;
case "bottom":
top = rect.bottom + TOOLTIP_GAP_PX;
left = rect.left + rect.width / 2 - tipRect.width / 2;
break;
case "left":
top = rect.top + rect.height / 2 - tipRect.height / 2;
left = rect.left - tipRect.width - TOOLTIP_GAP_PX;
break;
case "right":
top = rect.top + rect.height / 2 - tipRect.height / 2;
left = rect.right + TOOLTIP_GAP_PX;
break;
}
setCoords({ top, left });
}, [placement]);
const showWithDelay = useCallback(
(delay: number): void => {
if (timerRef.current !== undefined) {
clearTimeout(timerRef.current);
}
timerRef.current = setTimeout(() => {
computePosition();
setVisible(true);
timerRef.current = undefined;
}, delay);
},
[computePosition],
);
const showHover = useCallback((): void => {
showWithDelay(delayMs);
}, [delayMs, showWithDelay]);
const showFocus = useCallback((): void => {
showWithDelay(0);
}, [showWithDelay]);
const hide = useCallback((): void => {
if (timerRef.current !== undefined) {
clearTimeout(timerRef.current);
timerRef.current = undefined;
}
setVisible(false);
}, []);
// Dismiss on Escape key; reposition on scroll/resize while visible.
useEffect(() => {
if (!visible) {
return;
}
const handleKeyDown = (event: KeyboardEvent): void => {
if (event.key === "Escape") {
hide();
}
};
document.addEventListener("keydown", handleKeyDown);
window.addEventListener("scroll", computePosition, true);
window.addEventListener("resize", computePosition);
return () => {
document.removeEventListener("keydown", handleKeyDown);
window.removeEventListener("scroll", computePosition, true);
window.removeEventListener("resize", computePosition);
};
}, [visible, hide, computePosition]);
// Cleanup timer on unmount
useEffect(() => {
return () => {
if (timerRef.current !== undefined) {
clearTimeout(timerRef.current);
}
};
}, []);
const Tag = inline ? "span" : "div";
const wrapperClass = [inline ? styles.wrapper : styles.wrapperBlock, className]
.filter(Boolean)
.join(" ");
// Inject aria-describedby onto the child element when it is a single
// ReactElement so screen readers announce the tooltip from the focused node.
// Merges with any existing aria-describedby value on the child.
let renderedChildren: React.ReactNode = children;
if (isValidElement(children)) {
const child = children as ReactElement<{ "aria-describedby"?: string }>;
const existing = child.props["aria-describedby"];
const mergedDescribedBy = visible
? existing
? `${existing} ${tooltipId}`
: tooltipId
: existing;
renderedChildren = cloneElement(child, {
"aria-describedby": mergedDescribedBy,
});
}
const tooltipElement = (
<div
ref={tooltipRef}
id={tooltipId}
role="tooltip"
className={`${styles.tooltip} ${styles[placement]} ${visible ? styles.visible : ""}`}
style={{ top: coords.top, left: coords.left }}
data-testid={testId ?? "tooltip"}
>
{text}
</div>
);
return (
<Tag
ref={wrapperRef as React.Ref<HTMLSpanElement & HTMLDivElement>}
className={wrapperClass}
onMouseEnter={showHover}
onMouseLeave={hide}
onFocus={showFocus}
onBlur={hide}
>
{renderedChildren}
{canPortal ? createPortal(tooltipElement, document.body) : null}
</Tag>
);
}
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