{ "$schema": "https://ui.shadcn.com/schema/registry-item.json", "name": "tooltip", "type": "registry:component", "title": "Tooltip", "description": "Hover or focus tooltip with blur enter/exit and spring spawn.", "author": "Saurabh ", "dependencies": [ "clsx", "motion", "tailwind-merge" ], "registryDependencies": [], "files": [ { "path": "components/motion/tooltip.tsx", "type": "registry:component", "target": "@components/motion/tooltip.tsx", "content": "\"use client\";\n// asharca.github.io/ui/components/motion/tooltip\n\nimport { AnimatePresence } from \"motion/react\";\nimport {\n cloneElement,\n isValidElement,\n type PointerEvent,\n type ReactElement,\n type ReactNode,\n type RefObject,\n useCallback,\n useEffect,\n useId,\n useLayoutEffect,\n useRef,\n useState,\n} from \"react\";\nimport { createPortal } from \"react-dom\";\nimport { TooltipSurface } from \"@/components/motion/tooltip-surface\";\nimport { useDismiss } from \"@/lib/hooks/use-dismiss\";\nimport { useHoverGesture } from \"@/lib/hooks/use-hover-gesture\";\nimport { useTapGesture } from \"@/lib/hooks/use-tap-gesture\";\nimport { cn } from \"@/lib/utils\";\n\ntype Side = \"top\" | \"right\" | \"bottom\" | \"left\";\n\nexport interface TooltipProps {\n content: ReactNode;\n children?: ReactElement;\n /** Existing trigger for controlled integrations such as chart cells. */\n anchorRef?: RefObject;\n /** Point within the anchor, as fractions of its rendered width and height. */\n anchorPoint?: { x: number; y: number };\n /** Follow real pointer coordinates; keyboard focus still uses the anchor. */\n followCursor?: boolean;\n open?: boolean;\n onOpenChange?: (open: boolean) => void;\n id?: string;\n side?: Side;\n /** Delay before showing (ms). Default 120. */\n delay?: number;\n className?: string;\n /** Classes for the outer wrapper span. Use to fix baseline / fill parent. */\n wrapperClassName?: string;\n}\n\n// Gap between trigger and tooltip, in px.\nconst GAP = 8;\n\n// Centering transform for the fixed-positioned anchor point, per side.\nconst anchorTransform: Record = {\n top: \"translate(-50%, -100%)\",\n bottom: \"translate(-50%, 0)\",\n left: \"translate(-100%, -50%)\",\n right: \"translate(0, -50%)\",\n};\n\nconst transformOrigin: Record = {\n top: \"center bottom\",\n bottom: \"center top\",\n left: \"right center\",\n right: \"left center\",\n};\n\n// Once any tooltip has just closed, neighbouring tooltips open without the\n// initial delay — moving along a toolbar feels instant after the first one.\nconst WARM_WINDOW_MS = 300;\nlet lastHiddenAt = 0;\n\nexport function Tooltip({\n content,\n children,\n side = \"top\",\n delay = 120,\n className,\n wrapperClassName,\n anchorRef: externalAnchorRef,\n anchorPoint,\n followCursor = false,\n open: controlledOpen,\n onOpenChange,\n id: providedId,\n}: TooltipProps) {\n const [internalOpen, setInternalOpen] = useState(false);\n const open = controlledOpen ?? internalOpen;\n const setOpen = useCallback(\n (next: boolean) => {\n if (controlledOpen === undefined) setInternalOpen(next);\n onOpenChange?.(next);\n },\n [controlledOpen, onOpenChange],\n );\n const [coords, setCoords] = useState<{ top: number; left: number } | null>(null);\n const generatedId = useId();\n const id = providedId ?? generatedId;\n const timer = useRef | null>(null);\n const wrapperRef = useRef(null);\n const anchorRef = externalAnchorRef ?? wrapperRef;\n const hover = useHoverGesture();\n const surfaceRef = useRef(null);\n const pointer = useRef<{ x: number; y: number } | null>(null);\n\n // Anchor point in viewport coords, on the edge of the trigger facing `side`.\n // Position:fixed means these viewport coords place the tooltip directly, so\n // it escapes every ancestor's stacking context and overflow.\n const place = useCallback(() => {\n const el = anchorRef.current;\n if (!el) return;\n const r = el.getBoundingClientRect();\n const cursor = followCursor ? pointer.current : null;\n const cx = cursor?.x ?? r.left + r.width * (anchorPoint?.x ?? 0.5);\n const cy = cursor?.y ?? r.top + r.height * (anchorPoint?.y ?? 0.5);\n const point: Record = {\n top: { top: (cursor || anchorPoint ? cy : r.top) - GAP, left: cx },\n bottom: { top: (cursor || anchorPoint ? cy : r.bottom) + GAP, left: cx },\n left: { top: cy, left: (cursor || anchorPoint ? cx : r.left) - GAP },\n right: { top: cy, left: (cursor || anchorPoint ? cx : r.right) + GAP },\n };\n const next = point[side];\n const width = surfaceRef.current?.offsetWidth ?? 0;\n const height = surfaceRef.current?.offsetHeight ?? 0;\n const dx = side === \"left\" ? width : side === \"right\" ? 0 : width / 2;\n const dy = side === \"top\" ? height : side === \"bottom\" ? 0 : height / 2;\n next.left = Math.max(GAP + dx, Math.min(next.left, window.innerWidth - GAP - width + dx));\n next.top = Math.max(GAP + dy, Math.min(next.top, window.innerHeight - GAP - height + dy));\n setCoords(previous => previous?.top === next.top && previous.left === next.left ? previous : next);\n }, [side, anchorRef, anchorPoint, followCursor]);\n\n useLayoutEffect(() => {\n const anchor = anchorRef.current;\n if (!followCursor || !anchor) return;\n const track = (event: Event) => {\n if (!(event instanceof globalThis.PointerEvent) || (event.pointerType !== \"mouse\" && event.pointerType !== \"pen\")) return;\n pointer.current = { x: event.clientX, y: event.clientY };\n if (open) place();\n };\n const reset = () => {\n pointer.current = null;\n if (open) place();\n };\n anchor.addEventListener(\"pointerenter\", track);\n anchor.addEventListener(\"pointermove\", track);\n anchor.addEventListener(\"pointerleave\", reset);\n anchor.addEventListener(\"focusin\", reset);\n return () => {\n anchor.removeEventListener(\"pointerenter\", track);\n anchor.removeEventListener(\"pointermove\", track);\n anchor.removeEventListener(\"pointerleave\", reset);\n anchor.removeEventListener(\"focusin\", reset);\n };\n }, [anchorRef, followCursor, open, place]);\n\n const positioned = coords !== null;\n useLayoutEffect(() => {\n if (!open) return;\n place();\n const observer = new ResizeObserver(place);\n if (anchorRef.current) observer.observe(anchorRef.current);\n if (positioned && surfaceRef.current) observer.observe(surfaceRef.current);\n return () => observer.disconnect();\n }, [open, place, anchorRef, positioned]);\n\n const show = useCallback(() => {\n if (timer.current) clearTimeout(timer.current);\n const warm = Date.now() - lastHiddenAt < WARM_WINDOW_MS;\n timer.current = setTimeout(\n () => {\n place();\n setOpen(true);\n },\n warm ? 0 : delay,\n );\n }, [delay, place, setOpen]);\n\n const hide = useCallback(() => {\n if (timer.current) {\n clearTimeout(timer.current);\n timer.current = null;\n }\n if (open) lastHiddenAt = Date.now();\n setOpen(false);\n }, [open, setOpen]);\n\n // A finger never hovers, and Safari does not focus a button on tap either, so\n // the label is only reachable if the tap itself opens the tooltip. A click\n // carries no pointerType, so the pointerdown that preceded it is what says\n // whether this was a tap; keyboard activation arrives with no pointerdown at\n // all, and focus has already shown the label there.\n const tap = useTapGesture();\n\n const toggleOnTap = useCallback(() => {\n const gesture = tap.take();\n if (!gesture || gesture.pointerType === \"mouse\") return;\n if (gesture.state) {\n hide();\n return;\n }\n if (timer.current) clearTimeout(timer.current);\n place();\n setOpen(true);\n }, [hide, place, tap, setOpen]);\n\n // ...and closed again by the next tap that lands somewhere else. The label\n // covers nothing interactive, so that tap passes through to what it hit.\n useDismiss(open, hide, anchorRef);\n\n // Keep the tooltip pinned to the trigger while it's open and the page scrolls\n // or resizes (fixed coords are viewport-relative).\n useEffect(() => {\n if (!open) return;\n const onMove = () => place();\n window.addEventListener(\"scroll\", onMove, true);\n window.addEventListener(\"resize\", onMove);\n return () => {\n window.removeEventListener(\"scroll\", onMove, true);\n window.removeEventListener(\"resize\", onMove);\n };\n }, [open, place]);\n\n useEffect(\n () => () => {\n if (timer.current) clearTimeout(timer.current);\n },\n [],\n );\n\n if (!externalAnchorRef && !isValidElement(children)) return children;\n\n // The label describes the trigger, so it has to name the trigger itself.\n // Everything else the tooltip needs is read off the anchor below instead of\n // cloned on: a handler written onto the child is the child's handler as far\n // as that child can tell, and a component that owns its activation —\n // hard-wiring onClick and spreading the rest of its props over it, as\n // ThemeToggle does — then runs the tooltip's instead of its own. Composing\n // with `props.onClick` cannot save it either, because a component element's\n // props hold nothing the component does internally.\n const trigger = isValidElement(children)\n ? cloneElement(children as ReactElement>, {\n \"aria-describedby\": id,\n })\n : null;\n\n return (\n <>\n {!externalAnchorRef ? (\n // biome-ignore lint/a11y/noStaticElementInteractions: This wrapper observes bubbling trigger events without replacing the control's handlers.\n {\n if (hover.enter(event)) show();\n }}\n onPointerLeave={(event: PointerEvent) => {\n if (hover.leave(event)) hide();\n }}\n onFocus={show}\n onBlur={hide}\n onPointerDown={(event: PointerEvent) => tap.start(event, open)}\n // A gesture the platform took away sends no click, and a key press\n // starts an activation that never had a pointer behind it. Either way\n // the record has to go, or the next click reads a finger that has long\n // since lifted.\n onPointerCancel={tap.drop}\n onKeyDown={tap.drop}\n onClick={toggleOnTap}\n >\n {trigger}\n \n ) : null}\n {typeof document !== \"undefined\"\n ? createPortal(\n \n {open && coords ? (\n \n \n {content}\n \n \n ) : null}\n ,\n document.body,\n )\n : null}\n \n );\n}\n" }, { "path": "components/motion/tooltip-surface.tsx", "type": "registry:component", "target": "@components/motion/tooltip-surface.tsx", "content": "\"use client\";\n\nimport { motion, useReducedMotion, type Variants } from \"motion/react\";\nimport { useMemo, type ComponentProps, type ReactNode, type Ref } from \"react\";\nimport { EASE_OUT } from \"@/lib/ease\";\nimport { cn } from \"@/lib/utils\";\n\ntype Side = \"top\" | \"right\" | \"bottom\" | \"left\";\n\n// Offset is in the direction *away* from the trigger — content originates near\n// the trigger and rises into resting position.\nconst offsetFrom: Record = {\n top: { y: 8 },\n bottom: { y: -8 },\n left: { x: 8 },\n right: { x: -8 },\n};\n\n// Small tooltip surfaces need the lighter spawn used by the original Tooltip.\nconst TOOLTIP_SPRING = { type: \"spring\", stiffness: 380, damping: 30, mass: 0.7 } as const;\n\nfunction buildVariants(side: Side): Variants {\n const o = offsetFrom[side];\n return {\n initial: {\n opacity: 0,\n scale: 0.9,\n filter: \"blur(5px)\",\n x: o.x ?? 0,\n y: o.y ?? 0,\n },\n animate: {\n opacity: 1,\n scale: 1,\n filter: \"blur(0px)\",\n x: 0,\n y: 0,\n transition: {\n ...TOOLTIP_SPRING,\n opacity: { duration: 0.14, ease: EASE_OUT },\n filter: { duration: 0.18, ease: EASE_OUT },\n },\n },\n exit: {\n opacity: 0,\n scale: 0.94,\n filter: \"blur(3px)\",\n x: (o.x ?? 0) * 0.6,\n y: (o.y ?? 0) * 0.6,\n transition: { duration: 0.12, ease: EASE_OUT },\n },\n };\n}\n\nconst REDUCED_VARIANTS: Variants = {\n initial: { opacity: 0 },\n animate: { opacity: 1, transition: { duration: 0.14, ease: EASE_OUT } },\n exit: { opacity: 0, transition: { duration: 0.1, ease: EASE_OUT } },\n};\n\n/** The shared visual surface for trigger tooltips and chart readouts. Positioning belongs to the caller. */\nexport function TooltipSurface({\n children,\n side = \"top\",\n className,\n ref,\n ...props\n}: Omit, \"children\"> & {\n children?: ReactNode;\n side?: Side;\n ref?: Ref;\n}) {\n const reduce = useReducedMotion();\n const variants = useMemo(() => reduce ? REDUCED_VARIANTS : buildVariants(side), [reduce, side]);\n return (\n \n {children}\n \n );\n}\n" }, { "path": "lib/hooks/use-dismiss.ts", "type": "registry:hook", "target": "@lib/hooks/use-dismiss.ts", "content": "\"use client\";\n\nimport { type RefObject, useEffect } from \"react\";\n\n/**\n * What the dismissing gesture does to the control it landed on.\n *\n * `\"pass-through\"` is the platform norm (native popover light-dismiss): the\n * tap closes the overlay *and* activates whatever was under it. Use\n * `\"consume\"` where the open overlay sits over or beside controls that would\n * be costly to trigger by accident — the dismissal then swallows the\n * activation too, so the gesture only closes.\n */\nexport type DismissBehavior = \"pass-through\" | \"consume\";\n\nexport interface DismissOptions {\n /** Default `\"pass-through\"`. */\n behavior?: DismissBehavior;\n /** Dismiss on Escape as well. Default true. */\n escape?: boolean;\n /** Return true for an outside target that should *not* dismiss. Must be stable. */\n ignore?: (target: Element) => boolean;\n}\n\n/**\n * What every currently open dismiss scope counts as inside itself. A consumed\n * dismissal reads this to tell a stray gesture from one that belongs to an\n * overlay in front of it: overlays have no shared z-order to consult, but the\n * one the gesture landed in has said as much by registering it.\n */\nconst openScopes = new Set<(target: Element) => boolean>();\n\nfunction claimedByAnotherScope(\n self: (target: Element) => boolean,\n target: Element,\n) {\n for (const scope of openScopes) {\n if (scope !== self && scope(target)) return true;\n }\n return false;\n}\n\n// preventDefault on pointerdown does not suppress the click that follows, so\n// consuming a gesture means swallowing that click itself. The swallower\n// deliberately outlives the effect that installed it — the dismissal it\n// belongs to has already unmounted or re-rendered by the time the click lands.\n// It releases on that click, or on the next gesture if the pointer is dragged\n// away and no click ever arrives, so it can never eat a later one. A keydown\n// releases it too: a gesture that ends with neither a click nor a cancel would\n// otherwise leave it armed, and the click Enter synthesizes on some focused\n// control is not the one this dismissal was owed.\nfunction consumeActivation(source: Event) {\n const swallow = (event: MouseEvent) => {\n event.preventDefault();\n event.stopPropagation();\n release();\n };\n const restart = (event: Event) => {\n if (event !== source) release();\n };\n const release = () => {\n window.removeEventListener(\"click\", swallow, true);\n window.removeEventListener(\"pointerdown\", restart, true);\n window.removeEventListener(\"pointercancel\", restart, true);\n window.removeEventListener(\"keydown\", release, true);\n };\n window.addEventListener(\"click\", swallow, true);\n window.addEventListener(\"pointerdown\", restart, true);\n window.addEventListener(\"pointercancel\", restart, true);\n window.addEventListener(\"keydown\", release, true);\n}\n\n/**\n * Close an open overlay on Escape or a pointerdown outside `ref`. Pass `null`\n * for `ref` when what counts as inside isn't one element, and say so with\n * `ignore` instead.\n *\n * The pointerdown listener is capture-phase: a bubble-phase one is blinded by\n * any handler in between that stops propagation, and an overlay cannot know\n * what it is layered over. `onDismiss` and `ignore` must be stable (wrap in\n * useCallback) so the listeners aren't re-bound every render while open.\n */\nexport function useDismiss(\n open: boolean,\n onDismiss: () => void,\n ref: RefObject | null,\n {\n behavior = \"pass-through\",\n escape: dismissOnEscape = true,\n ignore,\n }: DismissOptions = {},\n) {\n useEffect(() => {\n if (!open) return;\n const inside = (target: Element) =>\n Boolean(ref?.current?.contains(target)) || Boolean(ignore?.(target));\n const onKey = (event: KeyboardEvent) => {\n if (dismissOnEscape && event.key === \"Escape\") onDismiss();\n };\n const onPointer = (event: PointerEvent) => {\n const target = event.target as Element | null;\n if (!target || inside(target)) return;\n // Outside this overlay, but inside one that is also open: the gesture is\n // that overlay's to answer, and swallowing its click from behind would\n // cost the user the control they actually aimed at.\n if (behavior === \"consume\" && !claimedByAnotherScope(inside, target)) {\n consumeActivation(event);\n }\n onDismiss();\n };\n openScopes.add(inside);\n window.addEventListener(\"keydown\", onKey);\n window.addEventListener(\"pointerdown\", onPointer, true);\n return () => {\n openScopes.delete(inside);\n window.removeEventListener(\"keydown\", onKey);\n window.removeEventListener(\"pointerdown\", onPointer, true);\n };\n }, [open, onDismiss, ref, behavior, dismissOnEscape, ignore]);\n}\n" }, { "path": "lib/hooks/use-hover-gesture.ts", "type": "registry:hook", "target": "@lib/hooks/use-hover-gesture.ts", "content": "\"use client\";\n\nimport { useMemo, useRef } from \"react\";\nimport { isHoveringPointer } from \"@/lib/touch\";\n\ninterface BoundaryEvent {\n pointerId: number;\n pointerType: string;\n buttons: number;\n}\n\nexport interface HoverGesture {\n /** True when this enter starts a hover: the pointer arrived resting, not pressing. */\n enter: (event: BoundaryEvent) => boolean;\n /** True when this leave ends a hover that entered as one. */\n leave: (event: BoundaryEvent) => boolean;\n}\n\n/**\n * Pairs a surface's enter with its leave, per pointer.\n *\n * `isHoveringPointer` answers the question the *enter* asks — is this pointer\n * resting on the surface or pressing it — and both boundary cases go wrong if\n * the leave is asked the same question again:\n *\n * - A pen with no hover never rests. It arrives in contact, taps, and the spec\n * then requires its boundary events after `pointerup`, so the leave carries\n * `buttons: 0` and reads as a mouse gliding off. Hover teardown then undid\n * the tap — the panel the pen had just opened closed under it.\n * - A mouse pressed on the surface and dragged off leaves with `buttons: 1`.\n * Skipping teardown there strands the surface open: the release happens\n * outside, and no second leave ever comes.\n *\n * So the state a hover holds is released by the pointer that took it, whatever\n * the buttons say at the boundary, and a pointer that arrived in contact never\n * took it in the first place. Contact is the exception tracked here, not\n * hover: a leave from a pointer this surface never saw enter — mounted under\n * the cursor, say — still counts, since the alternative is state with no way\n * out.\n */\nexport function useHoverGesture(): HoverGesture {\n const contact = useRef(new Set());\n\n return useMemo(\n () => ({\n enter: (event) => {\n if (isHoveringPointer(event)) {\n contact.current.delete(event.pointerId);\n return true;\n }\n contact.current.add(event.pointerId);\n return false;\n },\n leave: (event) => {\n const arrivedInContact = contact.current.delete(event.pointerId);\n return !arrivedInContact && event.pointerType !== \"touch\";\n },\n }),\n [],\n );\n}\n" }, { "path": "lib/hooks/use-tap-gesture.ts", "type": "registry:hook", "target": "@lib/hooks/use-tap-gesture.ts", "content": "\"use client\";\n\nimport { useMemo, useRef } from \"react\";\n\n/** What a pointerdown recorded, read back by the click that ends its gesture. */\nexport interface TapRecord {\n /** Which input started the gesture. */\n pointerType: string;\n /** What the surface was showing when it started. */\n state: S;\n}\n\nexport interface TapGesture {\n /** Record the gesture a pointerdown starts, with the state it starts in. */\n start: (event: { pointerType: string }, state: S) => void;\n /** Read the record and clear it. `null` when no pointer is behind this click. */\n take: () => TapRecord | null;\n /** Drop the record: this gesture will never spend it on a click. */\n drop: () => void;\n}\n\n/**\n * The pointer gesture behind a click, recorded where the click cannot report\n * it. A `click` carries no `pointerType` in the engines that matter, so the\n * `pointerdown` before it is the only thing that says which input activated\n * the control — and whether one did at all, since keyboard activation\n * synthesizes a click with no pointer behind it.\n *\n * State goes in with the record because a click reports that no better: a\n * browser that focuses a control on contact can open the very panel the tap\n * was meant to open, and reading \"is it open\" at click time then undoes it.\n * What the gesture started against is what it acts on.\n *\n * The record is spent by one click and dropped by everything else, because a\n * record that outlives its gesture is worse than none:\n *\n * - A scroll or an OS gesture takes the touch away — `pointercancel`, no click\n * ever — and the finger would sit in the record until some later click.\n * - That later click is often `Enter` on a keyboard, which arrives with no\n * pointerdown of its own and would inherit the abandoned finger. A keydown\n * is the start of a keyboard activation and never part of a tap, so it drops\n * the record too.\n *\n * Both ends have to be wired by the surface: `drop` on `onPointerCancel` and\n * on `onKeyDown`.\n */\nexport function useTapGesture(): TapGesture {\n const record = useRef | null>(null);\n\n return useMemo(\n () => ({\n start: (event, state) => {\n record.current = { pointerType: event.pointerType, state };\n },\n take: () => {\n const spent = record.current;\n record.current = null;\n return spent;\n },\n drop: () => {\n record.current = null;\n },\n }),\n [],\n );\n}\n" }, { "path": "lib/utils.ts", "type": "registry:lib", "target": "@lib/utils.ts", "content": "import { clsx, type ClassValue } from \"clsx\"\nimport { twMerge } from \"tailwind-merge\"\n\nexport function cn(...inputs: ClassValue[]) {\n return twMerge(clsx(inputs))\n}\n" }, { "path": "lib/ease.ts", "type": "registry:lib", "target": "@lib/ease.ts", "content": "// Shared motion tokens. Easing curves mirror the CSS custom properties in\n// globals.css; springs are the canonical physics used across components.\n// Strong custom variants — defaults like `ease-in`/`ease-out` feel weak.\n\nexport const EASE_OUT = [0.16, 1, 0.3, 1] as const;\nexport const EASE_IN_OUT = [0.77, 0, 0.175, 1] as const;\nexport const EASE_DRAWER = [0.32, 0.72, 0, 1] as const;\n\n/** CSS string form of EASE_OUT for inline style transitions. */\nexport const EASE_OUT_CSS = \"cubic-bezier(0.16, 1, 0.3, 1)\";\n\n/** Press feedback on buttons and other tappable surfaces. */\nexport const SPRING_PRESS = {\n type: \"spring\",\n stiffness: 500,\n damping: 30,\n mass: 0.6,\n} as const;\n\n/** Content swaps — label/icon slots trading places inside a control. */\nexport const SPRING_SWAP = {\n type: \"spring\",\n stiffness: 460,\n damping: 30,\n mass: 0.55,\n} as const;\n\n/** Overlay panel entrances — modals and sheets summoned by pointer. */\nexport const SPRING_PANEL = {\n type: \"spring\",\n stiffness: 420,\n damping: 40,\n mass: 0.5,\n} as const;\n\n/** Shared-layout glides — pills, indicators and panels morphing between positions. */\nexport const SPRING_LAYOUT = {\n type: \"spring\",\n stiffness: 360,\n damping: 32,\n mass: 0.6,\n} as const;\n\n/** Cursor-follow physics for decorative mouse tracking (magnetic, tilt, dock). */\nexport const SPRING_MOUSE = {\n stiffness: 200,\n damping: 15,\n mass: 0.3,\n} as const;\n\n/** Dragged handles and fills (sliders) — critically damped `useSpring` config,\n * so the value follows the pointer butterily and never rebounds off an end. */\nexport const SPRING_GLIDE = {\n stiffness: 700,\n damping: 50,\n mass: 0.5,\n} as const;\n" }, { "path": "lib/touch.ts", "type": "registry:lib", "target": "@lib/touch.ts", "content": "// Shared touch primitives. iOS and iPadOS run their own gestures on top of the\n// page — the long-press selection callout and the selection it drags in with\n// it — and they win: once the platform claims a touch it cancels ours\n// mid-gesture, so a press-and-hold or a drag simply dies. Surfaces that own\n// their gesture have to opt out.\n//\n// What the two classes below cover, precisely:\n// - `-webkit-touch-callout: none` stops iOS's long-press callout. WebKit-only:\n// it is not a property other engines have, so it is inert everywhere else.\n// - `user-select: none` stops the long-press selection on every engine,\n// Android included, and stops a drag from painting a selection under the\n// cursor. It is inherited, so it reaches every descendant — which is why the\n// two classes differ only in whether they apply it unconditionally.\n// What neither covers:\n// - Chrome for Android's long-press menu on a link or an image. No CSS\n// suppresses it; a gesture surface that wraps one needs its own\n// `onContextMenu` with `preventDefault()`.\n// - The native drag of an `` or `` descendant. `-webkit-user-drag` is\n// not inherited and plain divs and buttons are not drag sources, so setting\n// it on the surface does nothing — the child itself needs `draggable={false}`.\n\n/**\n * Classes for a surface that *is* the control: a thumb, a drum, a stage, a\n * handle, a hold button. Selection is suppressed on every input, because a\n * drag that highlights the control's own label is wrong on a mouse too.\n * Compose with `touch-none` when the surface also owns the scroll axis — leave\n * it off when the page must still scroll from there.\n */\nexport const TOUCH_GESTURE_CLASS = \"select-none [-webkit-touch-callout:none]\";\n\n/**\n * The same opt-out for a gesture surface that wraps content the consumer owns:\n * a scroller, a context-menu trigger, a sheet header, a list row. Selection is\n * suppressed only where the platform runs its own press gestures — a coarse\n * pointer — so a mouse user can still select and copy that content. If the\n * gesture itself would paint a selection under the cursor, add `select-none`\n * for the duration of the gesture rather than reaching for\n * `TOUCH_GESTURE_CLASS`.\n *\n * `pointer: coarse` describes the *primary* pointer and nothing else, so a\n * hybrid machine reads it wrong in both directions: a tablet with a mouse\n * plugged in keeps touch as primary and loses mouse selection, and a laptop\n * with a touchscreen keeps the mouse as primary and leaves selection live\n * under a finger. No media query can answer per interaction — the query is\n * about the device, and the question is about the gesture in progress. The\n * default stays here because it is right on the machines that are one thing or\n * the other, and losing a selection is a nuisance; where the miss costs a\n * *gesture* instead, the surface pairs it with `holdSelection` on the press.\n */\nexport const TOUCH_GESTURE_CONTENT_CLASS =\n \"[-webkit-touch-callout:none] pointer-coarse:select-none\";\n\n/**\n * Suppress selection on `element` for as long as a gesture is running on it,\n * whatever the primary pointer of the machine happens to be. Returns the\n * release. Inline, so it wins over the class above and is gone again the\n * moment the gesture ends.\n *\n * For the press gestures a native selection would otherwise steal — a\n * long-press that opens a menu. Elsewhere prefer the classes: a surface that\n * takes selection away for the whole session is a surface whose text nobody\n * can copy.\n */\nexport function holdSelection(element: HTMLElement) {\n element.style.setProperty(\"user-select\", \"none\");\n element.style.setProperty(\"-webkit-user-select\", \"none\");\n return () => {\n element.style.removeProperty(\"user-select\");\n element.style.removeProperty(\"-webkit-user-select\");\n };\n}\n\n/**\n * Pointer capture, best effort. WebKit throws `NotFoundError` when the pointer\n * is already gone by the time the handler runs — routine on iOS, where the\n * system can claim the touch first — and an uncaught throw takes the rest of\n * the handler, the gesture included, down with it. Touch pointers carry\n * implicit capture anyway, so losing it is never fatal.\n */\nexport function capturePointer(element: Element, pointerId: number) {\n try {\n element.setPointerCapture(pointerId);\n } catch {\n // Pointer is no longer active — implicit capture still applies on touch.\n }\n}\n\n/** Release a capture taken with `capturePointer`, ignoring a stale pointer. */\nexport function releasePointer(element: Element, pointerId: number) {\n try {\n if (element.hasPointerCapture(pointerId)) {\n element.releasePointerCapture(pointerId);\n }\n } catch {\n // Capture was already dropped by the browser.\n }\n}\n\n/**\n * Whether this event came from a pointer that is *hovering*: not a touch, and\n * not currently pressed. Which input the user is holding right now is not\n * something a device capability can answer — a touchscreen laptop hovers and\n * taps, and iPadOS reports a fine hovering pointer for a finger — so both\n * paths stay live and each handler branches on the event it was given.\n *\n * A pen resting on the glass is making contact, not hovering: `buttons` is the\n * tell, and it sends a pen tap down the same route a finger takes.\n *\n * This answers what an *enter* asks. A leave is the other half of a pair and\n * has to be read against the enter that started it — `useHoverGesture` in\n * `lib/hooks/use-hover-gesture` does that, and hover surfaces should use it\n * rather than asking this question twice.\n */\nexport const isHoveringPointer = (event: {\n pointerType: string;\n buttons: number;\n}) => event.pointerType !== \"touch\" && event.buttons === 0;\n" } ] }