import type { FontFamilyConfig, FontConfig, DiagramConfig } from "@hylimo/diagram-common";
import type { FontFamily, SubsettedFont } from "./fontFamily.js";
import type { SubsetConfig } from "./subsetCollector.js";
import type { LayoutCache } from "../engine/layoutCache.js";
/**
 * Handles retrieving fonts from an url
 */
export declare class FontManager {
    private readonly subsetFontCache;
    /**
     * Id counter for fetched buffers
     */
    private fetchIdCounter;
    /**
     * Cache used to store download results based on the url
     */
    private readonly fetchCache;
    /**
     * Cache for font families
     */
    private readonly fontFamilyCache;
    /**
     * Handles font subsetting
     */
    private readonly subsetManager;
    /**
     * Creates a new font manager
     *
     * @param subsetFontCache cache for subsetted fonts
     */
    constructor(subsetFontCache: LayoutCache<SubsetFontKey, Promise<SubsettedFont>>);
    /**
     * Gets a font family, caches results if possible
     *
     * @param config the config of the font family
     * @param subsetConfig defines which subset to use
     * @param fontLoadingConfig the font config, used to determine if font subsetting is enabled and if external fonts are enabled
     * @returns the created font family, and a boolean indicating if the font family was cached
     */
    getFontFamily(config: FontFamilyConfig, subsetConfig: SubsetConfig, fontLoadingConfig: FontLoadingConfig): Promise<{
        fontFamily: FontFamily;
        cacheHit: boolean;
    }>;
    /**
     * Gets a font, uses the caches to provent unnecessary fetches
     *
     * @param config config necessary for collection font types and variation font types
     * @param subset the subset to use
     * @param fontLoadingConfig the font config, used to determine if font subsetting is enabled and if external fonts are enabled
     * @returns the font
     */
    private getFont;
    /**
     * Fetches a font from the cache or the url
     *
     * @param fontLoadingConfig the font config, used to determine if font subsetting is enabled and if external fonts are enabled
     * @param config the config of the font
     * @returns the fetched font buffer and its id
     */
    private fetchFont;
}
/**
 * Configuration for font loading
 * Defines if font subsetting is enabled and if external fonts are enabled
 */
type FontLoadingConfig = Pick<DiagramConfig, "enableFontSubsetting" | "enableExternalFonts">;
/**
 * Key used to store subsetted fonts in the cache
 */
export interface SubsetFontKey extends Omit<FontConfig, "url"> {
    /**
     * The id of the fetched buffer
     */
    id: number;
    /**
     * The subset to use
     */
    subset: string | undefined;
}
export {};
//# sourceMappingURL=fontManager.d.ts.map