import { InjectionKey } from 'vue';
export type TxIconType = 'emoji' | 'url' | 'file' | 'class' | 'builtin';
export type TxIconStatus = 'normal' | 'loading' | 'error';
export interface TxIconSource {
    type: TxIconType;
    value: string;
    status?: TxIconStatus;
    /** Icon color for monochrome rendering */
    color?: string;
    /** Preserve source colors for addressable SVG icons */
    colorful?: boolean;
    /** Error message (when status is error) */
    error?: string;
}
/**
 * Path data a `class` icon is drawn with instead of its class: `d` filled with
 * the icon color inside `viewBox` (default `0 0 24 24`). An empty `d` draws
 * nothing, which is what a glyph whose data is still loading should look like.
 */
export interface TxIconGlyph {
    d: string;
    viewBox?: string;
}
/**
 * Supplies path data for a `class` icon. `null` or `undefined` renders the
 * class itself.
 */
export type TxIconClassGlyphResolver = (className: string) => TxIconGlyph | null | undefined;
/**
 * URL resolver function type
 * @param url - Original URL/path value
 * @param type - Icon type ('url' | 'file')
 * @returns Resolved URL string
 */
export type TxIconUrlResolver = (url: string, type: 'url' | 'file') => string;
/**
 * SVG fetcher function type for custom fetch logic (e.g., with retry, transport)
 * @param url - Resolved URL to fetch
 * @returns Promise resolving to SVG content string
 */
export type TxIconSvgFetcher = (url: string) => Promise<string>;
export interface TxIconConfig {
    /** Custom URL resolver (e.g., for tfile:// protocol) */
    urlResolver?: TxIconUrlResolver;
    /** Custom SVG fetcher (e.g., with retry logic) */
    svgFetcher?: TxIconSvgFetcher;
    /** Default file protocol prefix (e.g., 'tfile://') */
    fileProtocol?: string;
    /**
     * Draws `class` icons from path data. A class only renders where the host's
     * stylesheet defines it, and a utility-CSS engine defines what it finds in
     * scanned source — a class picked at runtime, or one from a collection the
     * host does not install, appears in neither.
     */
    classGlyph?: TxIconClassGlyphResolver;
}
export declare const TX_ICON_CONFIG_KEY: InjectionKey<TxIconConfig>;