/**
 * StreamBuf - Minimal Event-Driven Stream Buffer for DOCX Streaming
 *
 * A lightweight stream buffer that emits data events when written to.
 * This is specifically designed for the streaming DOCX writer's needs:
 * - Write StringBuf or Uint8Array data
 * - Emit "data" events with Uint8Array chunks
 * - Emit "finish" on end()
 * - Support custom event listeners (once/on/emit)
 *
 * This is a word-module-local implementation to avoid depending on @excel/utils.
 */
import { EventEmitter } from "../../../utils/event-emitter.js";
import type { StringBuf } from "./string-buf.js";
interface StreamBufOptions {
    bufSize?: number;
}
/**
 * Minimal streaming buffer for piping XML data to ZIP compression.
 * Extends EventEmitter for event-driven data flow.
 */
declare class StreamBuf extends EventEmitter {
    private _ended;
    constructor(_options?: StreamBufOptions);
    /** Returns true if the stream is writable (not ended). */
    get writable(): boolean;
    /**
     * Write data to the stream. Emits a "data" event with the bytes.
     */
    write(data: Uint8Array | string | StringBuf | ArrayBuffer | ArrayBufferView, _encoding?: string | ((...args: unknown[]) => unknown), callback?: (...args: unknown[]) => unknown): void;
    /**
     * End the stream. Emits "finish" event.
     */
    end(chunk?: Uint8Array | string | StringBuf | ArrayBuffer | ArrayBufferView, _encoding?: string, callback?: (...args: unknown[]) => unknown): void;
}
export { StreamBuf };
export type { StreamBufOptions };