import type { DismissTooltipMsg, PinTooltipMsg, SetCursorMsg, UserClickMsg, UserSelectMsg } from "../transport/protocol";
import type { CssBounds, HostSink, UserClickPayload, UserSelectPayload } from "./tooltip-controller";
/**
 * The subset of `WorkerMsg`s that flow chart → host through a
 * `MessageHostSink`. Identical to the worker-side post payloads so the
 * sink can ship them straight to `WorkerRenderer.post` with no
 * intermediate translation.
 */
export type HostSinkEnvelope = PinTooltipMsg | DismissTooltipMsg | SetCursorMsg | UserClickMsg | UserSelectMsg;
/**
 * `HostSink` that posts pin / dismiss / setCursor / user-event intents
 * over a `postMessage`-style channel as `WorkerMsg`s. The host-side
 * transport listens for these and drives a `DomHostSink` for
 * pin/dismiss and dispatches `CustomEvent`s on the viewer for user
 * events.
 */
export declare class MessageHostSink implements HostSink {
    private _send;
    constructor(send: (msg: HostSinkEnvelope) => void);
    pin(lines: string[], pos: {
        px: number;
        py: number;
    }, bounds: CssBounds): void;
    dismiss(): void;
    setCursor(cursor: string): void;
    emitUserClick(payload: UserClickPayload): void;
    emitUserSelect(payload: UserSelectPayload): void;
}