/// <reference types="jquery" />
/**
 * Blocks the UI so that the user can't type anything or click any elements.
 * Note that this only applies to built-in input and features, for custom
 * features use [[isBlocked]] to check whether input should be accepted.
 *
 * Use [[unblock]] to remove the block.
 */
export declare function block(): void;
/**
 * Close a tag that is currently open.
 *
 * Because the tags are added as DOM elements, the tag isn't really "open"
 * in the sense that it would be missing the closing tag. Instead we jump
 * out of the tag and set output focus back to its parent element.
 *
 * @see [[openTag]]
 *
 * @param targetWindow  The target window in the Haven engine. This is practically always 0.
 * @returns Returns true if a tag was open, false if we were already at the top window level and nothing was done.
 */
export declare function closeTag(targetWindow?: number): boolean;
/**
 * Set output focus to an element.
 *
 * @param targetElement  A jQuery object or selector
 * @param targetWindow  The target window in the Haven engine. This is practically always 0.
 *
 * @returns Returns true if the focus was set successfully, false if the element wasn't found.
 */
export declare function focus(targetElement: string | JQuery.PlainObject, targetWindow?: number): boolean;
/**
 * Checks whether user input is blocked.
 *
 * @returns Returns true if input is blocked, otherwise false.
 * @since 3.2.6
 */
export declare function isBlocked(): boolean;
/**
 * Create a new HTML element, append it to the target window, and set the output
 * focus to the element.
 *
 * Example:
 * ```
 * vorple.layout.openTag( 'div', 'vorple' )  -->  <div class="vorple"></div>
 * ```
 *
 * @param tagName  Name of the tag to create
 * @param classes  Class names to add to the element
 * @param targetWindow  The target window in the Haven engine. This is practically always 0.
 *
 * @see [[closeTag]]
 *
 * @returns Returns true.
 */
export declare function openTag(tagName: string, classes: string, targetWindow?: number): true;
/**
 * Scroll an element into view. Scrolling is initiated only if the element
 * isn't already fully in view or its top position is not in the top
 * half of the page.
 *
 * If the element doesn't exist, the function doesn't do anything.
 *
 * @param target  The target element
 * @param speed  The duration of the scroll animation in milliseconds
 *
 * @returns Returns a promise that resolves to true when the scroll animation
 *   ends, or resolves to false if no scrolling was needed (element doesn't
 *   exist or is already in view.)
 */
export declare function scrollTo(target: string | JQuery.PlainObject, speed?: number): Promise<boolean>;
/**
 * Scroll to the end of the document.
 *
 * @param speed  The duration of the scroll animation in milliseconds
 * @returns Returns a promise that resolves when the scroll animation ends.
 */
export declare function scrollToEnd(speed?: number): Promise<void>;
/**
 * Unblock the UI.
 *
 * @see [[block]]
 */
export declare function unblock(): void;