99 lines
4.1 KiB
JavaScript
99 lines
4.1 KiB
JavaScript
/** ## jquery.flot.browser.js
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This plugin is used to make available some browser-related utility functions.
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### Methods
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*/
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(function ($) {
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'use strict';
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var browser = {
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/**
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- getPageXY(e)
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Calculates the pageX and pageY using the screenX, screenY properties of the event
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and the scrolling of the page. This is needed because the pageX and pageY
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properties of the event are not correct while running tests in Edge. */
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getPageXY: function (e) {
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// This code is inspired from https://stackoverflow.com/a/3464890
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var doc = document.documentElement,
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pageX = e.clientX + (window.pageXOffset || doc.scrollLeft) - (doc.clientLeft || 0),
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pageY = e.clientY + (window.pageYOffset || doc.scrollTop) - (doc.clientTop || 0);
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return { X: pageX, Y: pageY };
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},
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/**
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- getPixelRatio(context)
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This function returns the current pixel ratio defined by the product of desktop
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zoom and page zoom.
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Additional info: https://www.html5rocks.com/en/tutorials/canvas/hidpi/
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*/
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getPixelRatio: function(context) {
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var devicePixelRatio = window.devicePixelRatio || 1,
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backingStoreRatio =
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context.webkitBackingStorePixelRatio ||
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context.mozBackingStorePixelRatio ||
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context.msBackingStorePixelRatio ||
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context.oBackingStorePixelRatio ||
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context.backingStorePixelRatio || 1;
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return devicePixelRatio / backingStoreRatio;
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},
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/**
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- isSafari, isMobileSafari, isOpera, isFirefox, isIE, isEdge, isChrome, isBlink
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This is a collection of functions, used to check if the code is running in a
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particular browser or Javascript engine.
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*/
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isSafari: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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// Safari 3.0+ "[object HTMLElementConstructor]"
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return /constructor/i.test(window.top.HTMLElement) || (function (p) { return p.toString() === "[object SafariRemoteNotification]"; })(!window.top['safari'] || (typeof window.top.safari !== 'undefined' && window.top.safari.pushNotification));
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},
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isMobileSafari: function() {
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//isMobileSafari adapted from https://stackoverflow.com/questions/3007480/determine-if-user-navigated-from-mobile-safari
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return navigator.userAgent.match(/(iPod|iPhone|iPad)/) && navigator.userAgent.match(/AppleWebKit/);
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},
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isOpera: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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//Opera 8.0+
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return (!!window.opr && !!opr.addons) || !!window.opera || navigator.userAgent.indexOf(' OPR/') >= 0;
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},
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isFirefox: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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// Firefox 1.0+
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return typeof InstallTrigger !== 'undefined';
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},
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isIE: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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// Internet Explorer 6-11
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return /*@cc_on!@*/false || !!document.documentMode;
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},
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isEdge: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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// Edge 20+
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return !browser.isIE() && !!window.StyleMedia;
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},
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isChrome: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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// Chrome 1+
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return !!window.chrome && !!window.chrome.webstore;
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},
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isBlink: function() {
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// *** https://stackoverflow.com/questions/9847580/how-to-detect-safari-chrome-ie-firefox-and-opera-browser
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return (browser.isChrome() || browser.isOpera()) && !!window.CSS;
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}
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};
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$.plot.browser = browser;
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})(jQuery);
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