import { type Ref } from "vue";
/**
 * Vue-idiomatic result of {@link useKeyboardHeight}. Fields mirror the React
 * `KeyboardState` shape (`isKeyboardOpen`, `keyboardHeight`, `availableHeight`,
 * `viewportHeight`) and are exposed as readonly refs so consumers can bind them
 * reactively inside templates or computed values.
 */
export interface KeyboardState {
    isKeyboardOpen: Readonly<Ref<boolean>>;
    keyboardHeight: Readonly<Ref<number>>;
    availableHeight: Readonly<Ref<number>>;
    viewportHeight: Readonly<Ref<number>>;
}
/**
 * Composable to detect mobile keyboard appearance and calculate available
 * viewport height. Uses the Visual Viewport API to track keyboard state on
 * mobile devices.
 *
 * Mirrors the React `useKeyboardHeight` hook: returns `keyboardHeight` as the
 * difference between `window.innerHeight` and `visualViewport.height`, clamped
 * to `0`, and reports the keyboard as open when the diff exceeds `150` px.
 *
 * @example
 * ```vue
 * <script setup lang="ts">
 * import { useKeyboardHeight } from "@copilotkit/vue";
 *
 * const { isKeyboardOpen, keyboardHeight } = useKeyboardHeight();
 * </script>
 * ```
 */
export declare function useKeyboardHeight(): KeyboardState;
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