/**
 * Copyright Aquera Inc 2023
 *
 * This source code is licensed under the BSD-3-Clause license found in the
 * LICENSE file in the root directory of this source tree.
 */
import { CSSResultArray, TemplateResult } from 'lit';
import '../nile-button/nile-button';
import NileElement from '../internal/nile-element';
import type { NileAppShellPanelMode } from '../nile-app-shell/nile-app-shell';
/**
 * @summary The shell's right region — the AI assistant panel; takes over the panel chrome while the shell keeps the geometry and open state.
 *
 * @status stable
 * @since 2.0
 *
 * @tag nile-app-shell-panel
 *
 * @dependency nile-app-shell
 * @dependency nile-glyph
 *
 * @slot - The panel body. Scrolls.
 * @slot header - Replaces the default heading (mark plus label); the back control renders before it.
 * @slot actions - Controls added before the close button; size and clear their `base` part from page CSS to match the header's bare glyphs.
 * @slot footer - A composer, docked below the scroll region.
 *
 * @event nile-close - Emitted when the close button is pressed, after the shell has been told to close.
 * @event nile-back - Emitted when the back control is pressed; the page swaps its own content back.
 * @event nile-panel-back - Emitted right after `nile-back` for the same press, matching the shell's built-in panel chrome, so a page listening on the shell keeps working when it slots this component. Listen for one of the two, not both, or one press is handled twice.
 *
 * @csspart header - The header bar.
 * @csspart back - The back control, shown by `back`.
 * @csspart title - The default heading text.
 * @csspart actions - The header action group.
 * @csspart close - The close button.
 * @csspart body - The scrolling body.
 * @csspart footer - The footer.
 *
 * @cssproperty [--nile-app-shell-utility-size=32px] - Box the header's back and close controls sit in.
 *
 * @method goBack() - Emit `nile-back` then `nile-panel-back`, as the back control does.
 */
export declare class NileAppShellPanel extends NileElement {
    static get styles(): CSSResultArray;
    private shellLink;
    /** The heading, and the accessible name of the region. */
    label: string;
    /** Drops the header bar entirely. */
    noHeader: boolean;
    /** Shows a back control at the start of the header for a sub-view; the panel keeps no view stack and only emits `nile-back`. */
    back: boolean;
    /** Accessible name of the back control. */
    backLabel: string;
    /** Drops the close button — for a panel the page closes its own way. */
    noClose: boolean;
    /** Removes the body's padding, for a full-bleed transcript. */
    noPadding: boolean;
    /** Id of the shell to follow. Defaults to the nearest ancestor. */
    shell?: string;
    /** Mirrors the shell's panel mode. Set by the shell; treat it as read-only and style against it (`nile-app-shell-panel[mode='overlay']`). */
    mode: NileAppShellPanelMode;
    private _hasFooter;
    connectedCallback(): void;
    protected willUpdate(): void;
    protected updated(): void;
    /** Announce that the back control was pressed, as the page owns which view it goes back to: `nile-back`, then `nile-panel-back` for pages written against the shell's built-in panel chrome. */
    goBack(): void;
    /** Close the panel through the shell. */
    close(): void;
    private handleFooterSlotChange;
    render(): TemplateResult;
}
export default NileAppShellPanel;
declare global {
    interface HTMLElementTagNameMap {
        'nile-app-shell-panel': NileAppShellPanel;
    }
}