blockly
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Blockly is a library for building visual programming editors.
56 lines • 1.97 kB
TypeScript
/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import { Icon } from '../icons/icon.js';
import type { IFocusableNode } from '../interfaces/i_focusable_node.js';
import type { INavigationPolicy } from '../interfaces/i_navigation_policy.js';
/**
* Set of rules controlling keyboard navigation from an icon.
*/
export declare class IconNavigationPolicy implements INavigationPolicy<Icon> {
/**
* Returns the first child of the given icon.
*
* @param current The icon to return the first child of.
* @returns Null.
*/
getFirstChild(current: Icon): IFocusableNode | null;
/**
* Returns the parent of the given icon.
*
* @param current The icon to return the parent of.
* @returns The source block of the given icon.
*/
getParent(current: Icon): IFocusableNode | null;
/**
* Returns the next peer node of the given icon.
*
* @param current The icon to find the following element of.
* @returns The next icon, field or input following this icon, if any.
*/
getNextSibling(current: Icon): IFocusableNode | null;
/**
* Returns the previous peer node of the given icon.
*
* @param current The icon to find the preceding element of.
* @returns The icon's previous icon, if any.
*/
getPreviousSibling(current: Icon): IFocusableNode | null;
/**
* Returns whether or not the given icon can be navigated to.
*
* @param current The instance to check for navigability.
* @returns True if the given icon can be focused.
*/
isNavigable(current: Icon): boolean;
/**
* Returns whether the given object can be navigated from by this policy.
*
* @param current The object to check if this policy applies to.
* @returns True if the object is an Icon.
*/
isApplicable(current: any): current is Icon;
}
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