/*************************************************************
*
* Copyright (c) 2015-2016 The MathJax Consortium
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Interface definition for key navigatable menu elements.
*
* @author volker.sorge@gmail.com (Volker Sorge)
*/
/**
* Key codes.
* @enum {number}
*/
const KEY = {
RETURN : 13,
ESCAPE = 27,
SPACE = 32,
LEFT = 37,
UP = 38,
RIGHT = 39,
DOWN = 40
}
/**
* @interface
*/
KeyNavigatable = function() {}
/**
* Navigation selection on keyboard events.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.keydown = function() {};
/**
* Navigation on escape key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.escape = function() {};
/**
* Navigation on space key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.space = function() {};
/**
* Navigation on left arrow key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.left = function() {};
/**
* Navigation on right arrow key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.right = function() {};
/**
* Navigation on upwards arrow key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.up = function() {};
/**
* Navigation on downwards arrow key pressed.
* @param {KeyboardEvent} event The keyboard event that fired.
*/
KeyNavigatable.prototype.down = function() {};