import { type LayoutChangeEvent, type ViewStyle } from "react-native";
import { type Responsive } from "./responsive.js";
/**
 * Container probe for HUGGING components. A component whose root hugs its
 * content cannot learn its container's width by measuring itself (the Tabs
 * vertical rail post-mortem: the rail measured its own ~180px and `narrow`
 * latched true in any container). Render a sibling View with this style
 * beside the root and attach the measurement hook's `onLayout` to it:
 * absolutely positioned against the parent (RN Views are position:relative
 * by default), it spans the container's width in either flex direction,
 * takes no space in the flex flow (no gap slot), and intercepts nothing.
 */
export declare const containerProbe: ViewStyle;
export interface MeasuredWidth {
    /** The element's rounded layout width in px; 0 until the first layout. */
    width: number;
    /** True once a real layout has been observed (width > 0). */
    measured: boolean;
    /** Attach to the element to measure. Stable identity; re-renders only when
     *  the ROUNDED width changes, so subpixel relayout churn is free. */
    onLayout: (event: LayoutChangeEvent) => void;
}
/** Measure the width of whatever element the returned `onLayout` is attached to. */
export declare function useMeasuredWidth(): MeasuredWidth;
/** Like useMeasuredWidth, but `width` falls back to the WINDOW width until the
 *  first layout: the best available guess for the unmeasured first frame. For
 *  components whose threshold is a raw px value rather than a breakpoint
 *  (Form's two-column stack). Subscribes at bucket granularity so the fallback
 *  stays fresh across breakpoint-sized resizes without per-pixel re-renders.
 *
 *  The fallback is withheld until after hydration (see `useHydrated`), so a
 *  server-rendered app hydrates against the same markup it shipped. */
export declare function useContainerWidth(): MeasuredWidth;
export interface ContainerBreakpointOptions {
    /** Resolve against the WINDOW width until the element has measured, instead
     *  of rendering `base`. For above-the-fold grids whose desktop arrangement
     *  would visibly flash on a phone's first frame. */
    seedViewport?: boolean;
}
export interface ContainerBreakpoint<T> extends MeasuredWidth {
    /** The map value for the element's own width (base until measured, or the
     *  window-seeded value with `seedViewport`). */
    value: T;
}
/** Container query: resolve a Responsive map against the element's OWN width. */
export declare function useContainerBreakpoint<T>(map: Responsive<T>, options?: ContainerBreakpointOptions): ContainerBreakpoint<T>;
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