'use client'; import * as React from 'react'; import { createPortal } from 'react-dom'; import { InfoCircleIcon, Loader2Icon, XIcon } from '@/icons'; import { cn } from '@/lib/utils'; import { focusRing } from '@/lib/cva-presets'; import { toast, toastStore, type ToastKind, type ToastRecord } from './store'; export type ToastPosition = | 'top-left' | 'top-center' | 'top-right' | 'bottom-left' | 'bottom-center' | 'bottom-right'; export interface ToasterProps { position?: ToastPosition; /** Default milliseconds on screen. A toast can override it. */ duration?: number; /** How many to show at once; older ones wait their turn. */ visibleToasts?: number; /** Show a dismiss button on every toast. */ closeButton?: boolean; /** * Toasts render in a portal on `document.body`, which sits inside `` — * so a `dark` class on the root element reaches them, and the default, * `'inherit'`, is right for most apps. Force it only when the app scopes dark * mode to a wrapper the portal escapes. */ theme?: 'inherit' | 'light' | 'dark'; /** Accessible name for the notification region. */ label?: string; icons?: Partial>; className?: string; toastClassName?: string; } /* * CBAR draws **one** glyph on every toast and tells the states apart by colour * alone: all five variants of its Toast set (`2414:10758`) instantiate * `Solid/Status/Info-circle`, at 20px, including `success` and `error`. This * follows the design file rather than substituting a tick and a warning * triangle, so a toast raised here looks like the one in the design review. * * `loading` is the exception, and the only one: it has no counterpart on the * canvas, and a static circle would throw away the one thing a pending toast * has to communicate. It keeps the spinner. * * The colour is `--ctl-icon` on the slot below — a lower-contrast role than * `--ctl-fg`, deliberately. See the note beside it in `theme.css`. */ const defaultIcons: Record = { default: , success: , info: , warning: , error: , loading: , }; /** * A toast's kind is its status, and status travels on a palette in this kit — * so the kind picks the palette class and every colour below reads `--ctl-*` * from there. CBAR's `neutral` maps to `black`, and `loading` (which CBAR does * not draw) borrows it. */ const kindPalettes: Record = { default: 'palette-black', success: 'palette-green', info: 'palette-secondary', warning: 'palette-yellow', error: 'palette-red', loading: 'palette-black', }; const positionClasses: Record = { 'top-left': 'top-0 left-0 items-start', 'top-center': 'top-0 left-1/2 -translate-x-1/2 items-center', 'top-right': 'top-0 right-0 items-end', 'bottom-left': 'bottom-0 left-0 items-start', 'bottom-center': 'bottom-0 left-1/2 -translate-x-1/2 items-center', 'bottom-right': 'bottom-0 right-0 items-end', }; /** Distance a pointer has to travel before the swipe counts as a dismissal. */ const SWIPE_THRESHOLD = 40; interface ToastProps { toast: ToastRecord; duration: number; position: ToastPosition; closeButton: boolean; icons?: ToasterProps['icons']; className?: string; } function Toast({ toast: record, duration, position, closeButton, icons, className }: ToastProps) { const [paused, setPaused] = React.useState(false); const [swipe, setSwipe] = React.useState(0); const dragFrom = React.useRef(null); const lifetime = record.duration ?? duration; const remaining = React.useRef(lifetime); const fromTop = position.startsWith('top'); const lastLifetime = React.useRef(lifetime); /* The timer lives here rather than in the store, because only the rendered toast knows whether a pointer is resting on it. Pausing clears the timeout and books the elapsed time against `remaining`, so resuming continues rather than restarting. */ React.useEffect(() => { /* * A re-publish can change the lifetime of a toast that is already on * screen: `toast.promise` replaces the pending record with the settled one * under the same id, so React keeps this element and only the props change. * `remaining` would otherwise still hold the pending toast's budget — which * is `Infinity`, and `setTimeout` clamps that to 1ms, so the settled toast * would flash and vanish. `lifetime` is in this effect's deps, so the reset * lands before the timer below is scheduled with it. */ if (lastLifetime.current !== lifetime) { lastLifetime.current = lifetime; remaining.current = lifetime; } if (paused || lifetime === Infinity || record.dismissing) return; const startedAt = Date.now(); const timer = setTimeout(() => { record.onAutoClose?.(record); toastStore.dismiss(record.id); }, remaining.current); return () => { clearTimeout(timer); remaining.current -= Date.now() - startedAt; }; }, [paused, lifetime, record]); const endSwipe = () => { if (dragFrom.current === null) return; dragFrom.current = null; if (Math.abs(swipe) >= SWIPE_THRESHOLD) toastStore.dismiss(record.id); else setSwipe(0); }; /* Every kind carries a glyph now, `default` included — CBAR's `neutral` variant draws one, so there is no branch to make here any more. Pass `icons={{ default: false }}` to suppress it. */ const icon = icons?.[record.kind] ?? defaultIcons[record.kind]; return (

setPaused(true)} onPointerLeave={() => { setPaused(false); endSwipe(); }} /* Focus pauses too — a keyboard user reading the toast should not have it disappear mid-sentence. */ onFocusCapture={() => setPaused(true)} onBlurCapture={() => setPaused(false)} onPointerDown={(event) => { dragFrom.current = event.clientY; }} onPointerMove={(event) => { if (dragFrom.current === null) return; const delta = event.clientY - dragFrom.current; /* Only the direction that carries the toast off its own edge counts. */ setSwipe(fromTop ? Math.min(0, delta) : Math.max(0, delta)); }} onPointerUp={endSwipe} > {record.render ? ( record.render(record.id) ) : ( <> {icon ? {icon} : null} {/* CBAR sets the title and the description in the same ink and separates them by 5px, leaning on weight rather than colour. */}

{record.title ?

{record.title}

: null} {record.description ? (

{record.description}

) : null} {record.action || record.cancel ? (

{record.action ? ( ) : null} {record.cancel ? ( ) : null}

) : null}

{closeButton ? ( ) : null} )}

); } /** * Toast host. Mount it once, near the root of the app. * * ```tsx * // app shell * toast.success('Settings saved'); // anywhere * ``` * * Toasts are a plain vertical list rather than a collapsed stack: everything on * screen stays readable and reachable without being expanded first. */ function Toaster({ position = 'bottom-right', duration = 4000, visibleToasts = 3, closeButton = false, theme = 'inherit', label = 'Notifications', icons, className, toastClassName, }: ToasterProps) { const toasts = React.useSyncExternalStore( toastStore.subscribe, toastStore.getSnapshot, toastStore.getServerSnapshot ); /* The portal needs a document, which a server render does not have. Asking `useSyncExternalStore` for a value that differs between the two is the hydration-safe way to detect that — no effect, nothing to re-render past. */ const onClient = React.useSyncExternalStore( () => () => {}, () => true, () => false ); if (!onClient) return null; /* Newest wins the limited slots; at a top anchor the newest belongs at the top of the column, so the order flips with the position. */ const shown = toasts.slice(-visibleToasts); const ordered = position.startsWith('top') ? [...shown].reverse() : shown; return createPortal(

))}

, document.body ); } /* * `Toast` is exported here but deliberately **not** from `index.ts`, so it stays * out of the published surface — `/toast` remains `Toaster` + `toast`, and * adding the presentational piece to it would be a public API decision with a * changeset behind it. * * What it buys internally: the showcase imports the kit from `src/`, so it can * draw a real toast in a variant grid without going through the store. Without * this the only alternative was a hand-copied replica of the class recipe above, * which would drift the moment either side changed. */ export { Toast, Toaster, toast }; export type { ToastProps }; export type { ToastKind, ToastRecord, ToastId, ToastOptions, ToastAction } from './store';