import { ComputedRef, Ref } from '../../node_modules/vue';
/**
 * Direction the truncated text scrolls towards on hover.
 */
export type ActiveTextTruncateDirection = 'ltr' | 'rtl';
/**
 * Options driving the truncation animation. They mirror the
 * `ActiveTextTruncate` component props.
 */
export interface UseActiveTextTruncateOptions {
    /**
     * Number of pixels per millisecond for the text transition.
     */
    ppms: Ref<number>;
    /**
     * Maximum width of the fading mask, in pixels.
     */
    fadingMaxWidth: Ref<number>;
    /**
     * Minimum width of the fading mask, in pixels.
     */
    fadingMinWidth: Ref<number>;
    /**
     * Delay before the text starts moving, in milliseconds.
     */
    delay: Ref<number>;
    /**
     * Direction of the truncation animation.
     */
    direction: Ref<ActiveTextTruncateDirection>;
}
/**
 * Emit signature for the animation lifecycle events.
 */
type ActiveTextTruncateEmit = (event: 'cancel' | 'end' | 'start') => void;
/**
 * Reactive API returned by {@link useActiveTextTruncate}.
 */
export interface UseActiveTextTruncate {
    resizeRef: Ref<HTMLElement>;
    isFading: ComputedRef<boolean>;
    fadingLeftWidth: ComputedRef<string>;
    fadingRightWidth: ComputedRef<string>;
    textFinalOffset: ComputedRef<string>;
    textOffsetTransitionDelay: ComputedRef<string>;
    textOffsetTransitionDuration: ComputedRef<string>;
    resetTextLivePosition: () => void;
}
/**
 * Drives the resize-aware text truncation animation for `ActiveTextTruncate`:
 * measures the wrapper and text elements, derives the CSS custom properties
 * that animate the text offset and fading mask, and tracks the text position
 * live (via `requestAnimationFrame`) while a transition is running so the
 * fading mask can follow it.
 *
 * Reuses {@link useResizeObserver} to re-measure whenever the host element is
 * resized.
 *
 * @param options - Reactive truncation options (see {@link UseActiveTextTruncateOptions}).
 * @param emit - The component's emit function, used to raise `start`, `end` and `cancel`.
 * @returns The {@link UseActiveTextTruncate} API: `resizeRef` to attach to the
 *   host element, the derived CSS-value computeds for the template, and the
 *   `resetTextLivePosition` handler.
 * @remarks Internal building block of `ActiveTextTruncate`; not exported from the package root.
 * @example
 * import { toRef } from 'vue'
 * import { useActiveTextTruncate } from '@/composables/useActiveTextTruncate'
 *
 * const { resizeRef, isFading, resetTextLivePosition } = useActiveTextTruncate(
 *   {
 *     ppms: toRef(props, 'ppms'),
 *     fadingMaxWidth: toRef(props, 'fadingMaxWidth'),
 *     fadingMinWidth: toRef(props, 'fadingMinWidth'),
 *     delay: toRef(props, 'delay'),
 *     direction: toRef(props, 'direction')
 *   },
 *   emit
 * )
 */
export declare function useActiveTextTruncate(options: UseActiveTextTruncateOptions, emit: ActiveTextTruncateEmit): UseActiveTextTruncate;
export default useActiveTextTruncate;