100 lines
2.0 KiB
JavaScript
100 lines
2.0 KiB
JavaScript
/**
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* @module ol/has
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*/
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import {HAS_WEBGL} from './index.js';
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const ua = typeof navigator !== 'undefined' ?
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navigator.userAgent.toLowerCase() : '';
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/**
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* User agent string says we are dealing with Firefox as browser.
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* @type {boolean}
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*/
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export const FIREFOX = ua.indexOf('firefox') !== -1;
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/**
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* User agent string says we are dealing with Safari as browser.
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* @type {boolean}
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*/
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export const SAFARI = ua.indexOf('safari') !== -1 && ua.indexOf('chrom') == -1;
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/**
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* User agent string says we are dealing with a WebKit engine.
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* @type {boolean}
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*/
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export const WEBKIT = ua.indexOf('webkit') !== -1 && ua.indexOf('edge') == -1;
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/**
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* User agent string says we are dealing with a Mac as platform.
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* @type {boolean}
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*/
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export const MAC = ua.indexOf('macintosh') !== -1;
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/**
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* The ratio between physical pixels and device-independent pixels
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* (dips) on the device (`window.devicePixelRatio`).
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* @const
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* @type {number}
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* @api
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*/
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export const DEVICE_PIXEL_RATIO = window.devicePixelRatio || 1;
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/**
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* True if the browser's Canvas implementation implements {get,set}LineDash.
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* @type {boolean}
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*/
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export const CANVAS_LINE_DASH = function() {
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let has = false;
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try {
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has = !!document.createElement('CANVAS').getContext('2d').setLineDash;
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} catch (e) {
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// pass
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}
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return has;
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}();
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/**
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* Is HTML5 geolocation supported in the current browser?
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* @const
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* @type {boolean}
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* @api
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*/
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export const GEOLOCATION = 'geolocation' in navigator;
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/**
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* True if browser supports touch events.
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* @const
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* @type {boolean}
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* @api
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*/
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export const TOUCH = 'ontouchstart' in window;
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/**
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* True if browser supports pointer events.
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* @const
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* @type {boolean}
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*/
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export const POINTER = 'PointerEvent' in window;
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/**
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* True if browser supports ms pointer events (IE 10).
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* @const
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* @type {boolean}
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*/
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export const MSPOINTER = !!(navigator.msPointerEnabled);
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/**
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* True if both OpenLayers and browser support WebGL.
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* @const
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* @type {boolean}
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* @api
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*/
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export const WEBGL = HAS_WEBGL;
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