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node_modules/selenium-webdriver/lib/goog/labs/useragent/engine.js
Maintainability
76.85
Lines of code
108
Difficulty
20.88
Estimated Errors
0.65
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// Copyright 2013 The Closure Library Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // distributed under the License is distributed on an "AS-IS" BASIS, // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. // See the License for the specific language governing permissions and // limitations under the License. /** * @fileoverview Closure user agent detection. * @see http://en.wikipedia.org/wiki/User_agent * For more information on browser brand, platform, or device see the other * sub-namespaces in goog.labs.userAgent (browser, platform, and device). * */ goog.provide('goog.labs.userAgent.engine'); goog.require('goog.array'); goog.require('goog.labs.userAgent.util'); goog.require('goog.string'); /** * @return {boolean} Whether the rendering engine is Presto. */ goog.labs.userAgent.engine.isPresto = function() { return goog.labs.userAgent.util.matchUserAgent('Presto'); }; /** * @return {boolean} Whether the rendering engine is Trident. */ goog.labs.userAgent.engine.isTrident = function() { // IE only started including the Trident token in IE8. return goog.labs.userAgent.util.matchUserAgent('Trident') || goog.labs.userAgent.util.matchUserAgent('MSIE'); }; /** * @return {boolean} Whether the rendering engine is WebKit. */ goog.labs.userAgent.engine.isWebKit = function() { return goog.labs.userAgent.util.matchUserAgentIgnoreCase('WebKit'); }; /** * @return {boolean} Whether the rendering engine is Gecko. */ goog.labs.userAgent.engine.isGecko = function() { return goog.labs.userAgent.util.matchUserAgent('Gecko') && !goog.labs.userAgent.engine.isWebKit() && !goog.labs.userAgent.engine.isTrident(); }; /** * @return {string} The rendering engine's version or empty string if version * can't be determined. */ goog.labs.userAgent.engine.getVersion = function() { var userAgentString = goog.labs.userAgent.util.getUserAgent(); if (userAgentString) { var tuples = goog.labs.userAgent.util.extractVersionTuples( userAgentString); var engineTuple = tuples[1]; if (engineTuple) { // In Gecko, the version string is either in the browser info or the // Firefox version. See Gecko user agent string reference: // http://goo.gl/mULqa if (engineTuple[0] == 'Gecko') { return goog.labs.userAgent.engine.getVersionForKey_( tuples, 'Firefox'); } return engineTuple[1]; } // IE has only one version identifier, and the Trident version is // specified in the parenthetical. var browserTuple = tuples[0]; var info; if (browserTuple && (info = browserTuple[2])) { var match = /Trident\/([^\s;]+)/.exec(info); if (match) { return match[1]; } } } return ''; }; /** * @param {string|number} version The version to check. * @return {boolean} Whether the rendering engine version is higher or the same * as the given version. */ goog.labs.userAgent.engine.isVersionOrHigher = function(version) { return goog.string.compareVersions(goog.labs.userAgent.engine.getVersion(), version) >= 0; }; /** * @param {!Array.<!Array.<string>>} tuples Version tuples. * @param {string} key The key to look for. * @return {string} The version string of the given key, if present. * Otherwise, the empty string. * @private */ goog.labs.userAgent.engine.getVersionForKey_ = function(tuples, key) { // TODO(nnaze): Move to util if useful elsewhere. var pair = goog.array.find(tuples, function(pair) { return key == pair[0]; }); return pair && pair[1] || ''; };