import { type CodeMapping, type LanguagePlugin, type VirtualCode } from '@volar/language-core';
import type ts from 'typescript';
import type { URI } from 'vscode-uri';
export declare const SUPPORTED_FRONTMATTER_EXTENSIONS: {
    md: string;
    mdx: string;
    mdoc: string;
};
export declare const SUPPORTED_FRONTMATTER_EXTENSIONS_KEYS: string[];
export declare const frontmatterRE: RegExp;
export type CollectionConfig = {
    reload: (folders: {
        uri: string;
    }[]) => void;
    configs: {
        folder: URI;
        config: CollectionConfigInstance;
    }[];
};
export type CollectionConfigInstance = {
    collections: {
        hasSchema: boolean;
        name: string;
    }[];
    entries: Record<string, string>;
};
export declare function getFrontmatterLanguagePlugin(collectionConfig: CollectionConfig): LanguagePlugin<URI, FrontmatterHolder>;
export declare class FrontmatterHolder implements VirtualCode {
    id: string;
    mappings: CodeMapping[];
    embeddedCodes: VirtualCode[];
    hasFrontmatter: boolean;
    fileName: string;
    languageId: string;
    snapshot: ts.IScriptSnapshot;
    collection: string | undefined;
    constructor(fileName: string, languageId: string, snapshot: ts.IScriptSnapshot, collection: string | undefined);
}