import type { LocaleText } from '../locale/index.js';
import type { ElementNode, SchemaEnv } from '../schema/index.js';
export interface ClipFile {
    readonly name: string;
    readonly type: string;
    readonly size: number;
}
export interface PasteData {
    readonly custom: string;
    readonly html: string;
    readonly plain: string;
    readonly files: readonly ClipFile[];
    readonly types: readonly string[];
}
export interface PasteCandidate {
    readonly id: string;
    readonly label: LocaleText | string;
    build(): readonly ElementNode[];
    readonly icon?: string;
    readonly inline?: boolean;
}
export interface DocSource {
    json(): unknown;
    html(): string;
    md(): string;
}
export interface IoFilter {
    readonly id: string;
    readonly label: LocaleText | string;
    readonly paste?: (data: PasteData) => PasteCandidate | readonly PasteCandidate[] | null;
    readonly save?: {
        readonly extension: string;
        readonly write: (doc: DocSource) => string;
        readonly canonical: boolean;
        readonly lossy?: boolean;
        readonly mime?: string;
    };
    readonly read?: {
        readonly extensions: readonly string[];
        readonly run: (name: string, text: string) => unknown;
    };
}
export declare function $assertIoFilter(value: IoFilter): void;
export interface MdContext {
    children(separator?: string, indent?: string): string;
    escape(raw: string): string;
    html(): string;
    readonly indent: string;
    readonly env: SchemaEnv;
}
export type MdBuilder = (node: ElementNode, ctx: MdContext) => string;
export type MdBuilders = Readonly<Record<string, MdBuilder>>;
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