/** What can be read from a booting live document without reaching into its driver. */
export type LiveBootDocumentState = {
    iframe: false;
} | {
    iframe: true;
    readyState: DocumentReadyState | null;
    presented: boolean;
};
/**
 * A live document's boot stage as a share of the boot once its frame exists:
 * the document starts parsing, finishes parsing, finishes loading, and is shown.
 * After loading the replay runs; it ends at the last share below 100, which
 * only the shown document reaches.
 */
export declare function liveBootStageProgress(state: LiveBootDocumentState): number | null;
export declare function clampProgress(value: number | null | undefined): number | null;
/** Share of the start-up done once the editor's scripts run: the page's module download is behind it. */
export declare const EDITOR_MODULES_DONE = 80;
/**
 * Start-up progress for a stage the editor reached. The module download fills
 * the first `EDITOR_MODULES_DONE` percent; each later stage only moves the bar
 * forward from wherever the page's loading screen left it.
 */
export declare function editorStartupProgress(stage: 'catalog' | 'workspace', bootValue?: number): number;