/**
 * dock-popout - open a real browser window and render a dock pane's content
 * inside it (Golden-Layout-style pop-out). Runtime-only: an OS window handle is
 * not serializable, so the manager tracks popped panes separately and pops them
 * back into the layout when the window closes.
 *
 * The popped nodes are created by the main document and adopted into the popup,
 * so they stay driven by the main window's reactivity - the pop-out shows the
 * same live content as the docked view. Stylesheets + `--sg-*` theme tokens are
 * copied across so it looks identical.
 */
import { type Snippet } from 'svelte';
import type { DockPane } from './dock-model';
export type Popout = {
    pane: DockPane;
    win: Window;
    destroy: () => void;
};
export type OpenPopoutOptions = {
    pane: DockPane;
    paneSnippet: Snippet<[DockPane]>;
    /** Element whose resolved `--sg-*` tokens theme the popup. */
    themeSource: HTMLElement;
    width?: number;
    height?: number;
    /** Called (once) when the popup closes, to pop the pane back in. */
    onClose: (paneId: string) => void;
};
/** Open a pop-out window for a pane. Returns null if the browser blocked it. */
export declare function openPopout(opts: OpenPopoutOptions): Popout | null;