import { PropertyValues } from 'lit';
import { SpectrumElement } from '../../element/index.js';
import { CardDensity, CardVariant } from './Card.types.js';
declare const CardBase_base: typeof SpectrumElement & {
    new (...args: any[]): import('../../mixins/index.js').SizedElementInterface;
    prototype: import('../../mixins/index.js').SizedElementInterface;
} & import('../../mixins/index.js').SizedElementConstructor;
/**
 * Abstract base class for all card-family components. Owns the semantics
 * shared across every card type: sizing, visual variant, and density.
 *
 * `swc-card`, `swc-user-card`, and `swc-product-card` each extend this base
 * directly and render the shared anatomy via `renderCardTemplate()` in
 * `swc/components/card/card-template.ts`. That template also carries a
 * collection placeholder and an avatar/thumbnail glyph, each supplied
 * per-component via `renderCollection`/`renderGlyph`.
 *
 * @attribute {ElementSize} size - The size of the card.
 *
 * @slot preview - Primary preview content
 * @slot title - Card title
 * @slot actions - Optional action controls
 * @slot description - Supporting description text
 * @slot footer - Optional footer content
 * @slot - Additional body content
 */
export declare abstract class CardBase extends CardBase_base {
    /**
     * @internal
     */
    static readonly VARIANTS: readonly CardVariant[];
    /**
     * @internal
     */
    static readonly DENSITIES: readonly CardDensity[];
    /**
     * The visual variant of the card.
     *
     * @default primary
     */
    variant: CardVariant;
    /**
     * The density of the card, controlling internal spacing and gaps.
     *
     * @default regular
     */
    density: CardDensity;
    /**
     * Indicates the consumer has wrapped their `title` slot content in a real
     * link. Extends that link's hit area to cover the card surface while
     * leaving navigation entirely consumer-owned — Card accepts no `href`.
     *
     * @todo Naming, and the `::slotted(a)::after` vs. click-proxy mechanism,
     * are still open. See the card family plan, A11y-3 / Q2.
     */
    titleAsLink: boolean;
    /**
     * Makes the card focusable and captures surface clicks (excluding nested
     * interactive targets) to dispatch a `swc-card-click` event, independent
     * of `titleAsLink`. Lays groundwork for a future `CardView` selection
     * model without Card owning selected-state UI itself.
     *
     * @todo Event name and `tabindex` management details are still open. See
     * the card family plan, A11y-3 / Q3.
     * @todo No `role` is set when `selectable` is true — deferred rather than
     * defaulting to `role="button"`, since the eventual `CardView` selection
     * model may call for a different role (e.g. `option`/`gridcell`) that
     * `role="button"` would be wrong to have committed to today. See the card
     * family plan, A11y-3 / Q8.
     */
    selectable: boolean;
    connectedCallback(): void;
    disconnectedCallback(): void;
    protected updated(changedProperties: PropertyValues): void;
    /**
     * @internal
     * The card's own `title` slot element, or `null` before the concrete
     * class's `renderCardTemplate()` call has rendered.
     */
    protected getTitleSlotElement(): HTMLSlotElement | null;
    /**
     * @internal
     * The `title` slot's link, supporting both forms consumers reasonably
     * use: the assigned element itself is the anchor (`<a slot="title"
     * href="...">`), or the anchor is nested inside a wrapper (`<span
     * slot="title"><a href="...">`). Requires `href` — a link with no
     * destination can't usefully be clicked-through.
     */
    protected getTitleLinkElement(): HTMLAnchorElement | null;
    /**
     * @internal
     * Whether `node` provides its own interaction/focus semantics. Checking
     * the `tabIndex` IDL property (rather than the `tabindex` attribute or a
     * tag-name list) correctly covers natively-interactive elements
     * (`button`, `input`, `select`, `textarea`, `a[href]`) with no explicit
     * attribute, excludes `tabindex="-1"` (focusable for scripting, not a
     * click target) and disabled controls, and works for a custom element's
     * internal shadow-DOM control too — `composedPath()` already traverses
     * into other elements' shadow roots for composed events like `click`, so
     * an internal `<button>` inside e.g. `<swc-button>` is inspected directly
     * regardless of which shadow tree it belongs to.
     */
    private static isFocusable;
    /**
     * Proxies a qualifying surface click to `titleAsLink`'s link and/or
     * dispatches `swc-card-click` for `selectable`, after filtering out
     * clicks that landed on a nested interactive target (see `isFocusable()`
     * and the `actions`-slot exclusion above).
     */
    protected readonly handleSurfaceClick: (event: Event) => void;
    /**
     * `tabindex` is only ever added alongside this listener (see `updated()`)
     * and removed alongside its removal — a focusable card is never left
     * without keyboard activation. Enter and Space are treated identically
     * and both proxy to `titleAsLink`'s link when set, even though a bare
     * link conventionally responds to Enter only: the card's own activation
     * contract (Enter+Space, more button-like) is authoritative once
     * `selectable` makes the card itself the focused target, regardless of
     * what that activation happens to proxy to.
     */
    protected readonly handleSelectableKeydown: (event: KeyboardEvent) => void;
}
export {};