added flot as the new plot library

frontend/lib/flot/jquery.flot.browser.js

@@ -0,0 +1,98 @@
+/** ## 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);