import * as React from "react";
import type { TamboThreadMessage } from "@tambo-ai/react";
/**
 * Custom hook to merge multiple refs into one callback ref
 * @param refs - Array of refs to merge
 * @returns A callback ref that updates all provided refs
 */
export declare function useMergedRef<T>(...refs: React.Ref<T>[]): (element: T) => void;
/**
 * Custom hook to detect canvas space presence and position
 * @param elementRef - Reference to the component to compare position with
 * @returns Object containing hasCanvasSpace and canvasIsOnLeft
 */
export declare function useCanvasDetection(elementRef: React.RefObject<HTMLElement | null>): {
    hasCanvasSpace: boolean;
    canvasIsOnLeft: boolean;
};
/**
 * Utility to check if a className string contains the "right" class
 * @param className - The className string to check
 * @returns true if the className contains "right", false otherwise
 */
export declare function hasRightClass(className?: string): boolean;
/**
 * Hook to calculate sidebar and history positions based on className and canvas position
 * @param className - Component's className string
 * @param canvasIsOnLeft - Whether the canvas is on the left
 * @returns Object with isLeftPanel and historyPosition values
 */
export declare function usePositioning(className?: string, canvasIsOnLeft?: boolean, hasCanvasSpace?: boolean): {
    isLeftPanel: boolean;
    historyPosition: "left" | "right";
};
/**
 * Converts message content into a safely renderable format.
 * Primarily joins text blocks from arrays into a single string.
 * @param content - The message content (string, element, array, etc.)
 * @returns A renderable string or React element.
 */
export declare function getSafeContent(content: TamboThreadMessage["content"] | React.ReactNode | undefined | null): string | React.ReactElement;
/**
 * Checks if message content contains meaningful, non-empty text.
 * @param content - The message content (string, element, array, etc.)
 * @returns True if there is content, false otherwise.
 */
export declare function checkHasContent(content: TamboThreadMessage["content"] | React.ReactNode | undefined | null): boolean;
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