import { PptxCustomShow, PptxHeaderFooter, PptxPresentationProperties } from 'pptx-viewer-core';
export interface PresentationMetadataHost {
    readonly editable: boolean;
    pushHistory(): void;
    commitChange(): void;
}
/** Owns presentation-level metadata and its undoable editor mutations. */
export declare class EditorPresentationMetadata {
    private readonly host;
    headerFooter: PptxHeaderFooter;
    presentationProperties: PptxPresentationProperties;
    customShows: PptxCustomShow[];
    constructor(host: PresentationMetadataHost);
    /**
     * Deep-copy a value that may be a rune PROXY.
     *
     * The dialogs build their edits in `$state`, so what reaches these setters is
     * a reactive proxy, and `structuredClone` throws `DataCloneError` on one. The
     * Header & Footer panel hit exactly that: "Apply to All" threw before it ever
     * assigned, so setting a footer silently did nothing and the canvas kept the
     * string the deck was loaded with. `$state.snapshot` is a pass-through for a
     * plain object, so this is safe for every caller.
     */
    private static clone;
    set(headerFooter?: PptxHeaderFooter, presentationProperties?: PptxPresentationProperties, customShows?: PptxCustomShow[]): void;
    updatePresentationProperties(next: PptxPresentationProperties): void;
    updateHeaderFooter(next: PptxHeaderFooter): void;
    updateCustomShows(next: PptxCustomShow[]): void;
    private commit;
}
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