/**
 * @module ol/has
 */

const ua = typeof navigator !== 'undefined' ?
  navigator.userAgent.toLowerCase() : '';

/**
 * User agent string says we are dealing with Firefox as browser.
 * @type {boolean}
 */
export const FIREFOX = ua.indexOf('firefox') !== -1;

/**
 * User agent string says we are dealing with Safari as browser.
 * @type {boolean}
 */
export const SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;

/**
 * User agent string says we are dealing with a WebKit engine.
 * @type {boolean}
 */
export const WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;

/**
 * User agent string says we are dealing with a Mac as platform.
 * @type {boolean}
 */
export const MAC = ua.indexOf('macintosh') !== -1;


/**
 * The ratio between physical pixels and device-independent pixels
 * (dips) on the device (`window.devicePixelRatio`).
 * @const
 * @type {number}
 * @api
 */
export const DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;


/**
 * Is HTML5 geolocation supported in the current browser?
 * @const
 * @type {boolean}
 * @api
 */
export const GEOLOCATION = 'geolocation' in navigator;


/**
 * True if browser supports touch events.
 * @const
 * @type {boolean}
 * @api
 */
export const TOUCH = 'ontouchstart' in window;


/**
 * True if browser supports pointer events.
 * @const
 * @type {boolean}
 */
export const POINTER = 'PointerEvent' in window;


/**
 * True if browser supports ms pointer events (IE 10).
 * @const
 * @type {boolean}
 */
export const MSPOINTER = !!(navigator.msPointerEnabled);


export {HAS as WEBGL} from './webgl.js';