import{type TemplateResult}from'lit';import{LyraElement}from'../../../internal/lyra-element.js';import type{LyraSize}from'../../../internal/variants.js';import type{LyraToastItem,LyraToastVariant}from'./toast-item.class.js';import'./toast-item.class.js';export type LyraToastPlacement='top-start'|'top-center'|'top-end'|'bottom-start'|'bottom-center'|'bottom-end';export type LyraToastIconContent=string|Node|TemplateResult;export type LyraToastIcon=LyraToastIconContent|((ownerDocument:Document)=>LyraToastIconContent);
/** Canonical options shared by the imperative helper and a toast region's object-form `create()`. */
export interface LyraToastOptions{message:string;placement?:LyraToastPlacement;ownerDocument?:Document;variant?:LyraToastVariant;duration?:number;
/** Item size. Long upstream spellings remain observable on the created item. */
size?:LyraSize;withIcon?:boolean;
/** Safe icon content. Strings are text, nodes are appended/imported, and factories may return a
* Lit template for the target document; no branch interprets a string as HTML. */
icon?:LyraToastIcon;
/** Optional action button rendered after the message. */
action?:{label:string;onClick:(item:LyraToastItem)=>void;};}
/** Options accepted beside the legacy string-form `create(message, options)`. */
export type LyraToastCreateOptions=Omit<LyraToastOptions,'message'|'placement'>;export interface LyraToastOverflowDetail{
/** Number of queued notifications discarded in the coalesced admission burst. */
count:number;}export interface LyraToastEventMap{'lr-toast-overflow':CustomEvent<LyraToastOverflowDetail>;}
/**
* `<lr-toast>` — one placement-specific stacking toast region. The `toast()` helper maintains one
* region per owner document and placement. Each keeps at most three items active and twenty more
* in a hidden, inert FIFO queue. Further admissions discard the
* oldest queued work and report the coalesced loss through an event and polite announcement.
* Membership is reconciled before every admission and reasserted after reconnect/reparent; a
* lasting region disconnect discards managed work instead of retaining nodes that could resurrect.
* Mirrors the Web Awesome `<wa-toast>` API under the `lr-` prefix.
*
* @customElement lr-toast
* @slot - `<lr-toast-item>` elements.
* @event lr-toast-overflow - Noncancelable notification that queued items were discarded to keep
*   the stack bounded. Synchronous losses are coalesced into `detail: { count }`.
* @csspart stack - The fl-column container holding the items.
* @cssprop --gap - Mapped alias for `--lr-toast-gap`.
* @cssprop --width - Mapped alias for `--lr-toast-width`.
* @cssprop [--lr-toast-gap=var(--lr-space-s)] - Gap between stacked items.
* @cssprop [--lr-toast-width=var(--lr-size-28rem)] - Inline size of the stack, capped by the
*   usable logical safe-area rectangle.
* @cssprop [--lr-toast-accent-width=var(--lr-size-4px)] - Width of a slotted item's accent bar.
*   Read by `<lr-toast-item>`'s own stylesheet, so set it on the item.
* @cssprop [--lr-toast-accent-color=var(--lr-color-border)] - Accent bar / icon color of a slotted
*   item. Its private default follows `variant`; an inherited or direct public value wins.
* @cssprop [--lr-toast-padding=var(--lr-space-m)] - Padding of a slotted item. Its private default
*   follows `size`; an inherited or direct public value wins.
* @cssprop [--lr-toast-font-size=var(--lr-font-size-m)] - Font size of a slotted item. Its private
*   default follows `size`; an inherited or direct public value wins.
* @cssprop [--lr-toast-show-duration=var(--lr-transition-base, 180ms ease-out)] - Show transition
*   of a slotted item. Read by `<lr-toast-item>`, so set it on the item.
* @cssprop [--lr-toast-hide-duration=var(--lr-transition-base, 180ms ease-out)] - Hide transition
*   of a slotted item. Read by `<lr-toast-item>`, so set it on the item.
* @cssstate visible - Present while the region contains at least one toast item.
* @status stable
* @since 4.0.0
*/
export declare class LyraToast extends LyraElement<LyraToastEventMap>{static styles:import("lit").CSSResultGroup[];
/** Where the stack anchors on screen. */
placement:LyraToastPlacement;private readonly toastInternals;private childObserver?;private readonly managedEntries;private readonly activeEntries;private readonly queuedEntries;private readonly admissionsInProgress;private connectionGeneration;private overflowSink?;private pendingOverflowCount;private overflowNotificationScheduled;
/** Live stack element, or `null` before the render root is populated. */
get stack():HTMLElement|null;private syncVisibleState;connectedCallback():void;disconnectedCallback():void;private get regionController();private admitEntry;private reassertEntry;private pruneAbsentEntries;private forgetEntry;private promoteQueuedEntries;private reconcileEntries;private recordOverflow;
/** Create and append a toast item programmatically. The object form shares the canonical
* `LyraToastOptions` contract with `toast()`; the legacy string form remains supported. A
* detached region rejects immediately rather than returning an update promise that cannot run. */
create(options:LyraToastOptions):Promise<LyraToastItem>;create(message:string,options?:LyraToastCreateOptions):Promise<LyraToastItem>;render():TemplateResult;}declare global{interface HTMLElementTagNameMap{'lr-toast':LyraToast;}}