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