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272 lines
8.3 KiB
272 lines
8.3 KiB
// Copyright 2013 The Closure Library Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS-IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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/**
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* @fileoverview Closure user agent detection (Browser).
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* @see <a href="http://www.useragentstring.com/">User agent strings</a>
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* For more information on rendering engine, platform, or device see the other
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* sub-namespaces in goog.labs.userAgent, goog.labs.userAgent.platform,
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* goog.labs.userAgent.device respectively.)
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*
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*/
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goog.provide('goog.labs.userAgent.browser');
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goog.require('goog.array');
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goog.require('goog.asserts');
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goog.require('goog.labs.userAgent.util');
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goog.require('goog.string');
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/**
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* @return {boolean} Whether the user's browser is Opera.
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* @private
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*/
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goog.labs.userAgent.browser.matchOpera_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Opera') ||
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goog.labs.userAgent.util.matchUserAgent('OPR');
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};
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/**
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* @return {boolean} Whether the user's browser is IE.
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* @private
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*/
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goog.labs.userAgent.browser.matchIE_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Trident') ||
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goog.labs.userAgent.util.matchUserAgent('MSIE');
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};
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/**
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* @return {boolean} Whether the user's browser is Firefox.
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* @private
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*/
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goog.labs.userAgent.browser.matchFirefox_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Firefox');
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};
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/**
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* @return {boolean} Whether the user's browser is Safari.
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* @private
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*/
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goog.labs.userAgent.browser.matchSafari_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Safari') &&
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!goog.labs.userAgent.util.matchUserAgent('Chrome') &&
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!goog.labs.userAgent.util.matchUserAgent('CriOS') &&
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!goog.labs.userAgent.util.matchUserAgent('Android');
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};
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/**
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* @return {boolean} Whether the user's browser is Chrome.
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* @private
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*/
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goog.labs.userAgent.browser.matchChrome_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Chrome') ||
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goog.labs.userAgent.util.matchUserAgent('CriOS');
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};
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/**
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* @return {boolean} Whether the user's browser is the Android browser.
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* @private
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*/
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goog.labs.userAgent.browser.matchAndroidBrowser_ = function() {
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return goog.labs.userAgent.util.matchUserAgent('Android') &&
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!goog.labs.userAgent.util.matchUserAgent('Chrome') &&
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!goog.labs.userAgent.util.matchUserAgent('CriOS');
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};
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/**
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* @return {boolean} Whether the user's browser is Opera.
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*/
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goog.labs.userAgent.browser.isOpera = goog.labs.userAgent.browser.matchOpera_;
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/**
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* @return {boolean} Whether the user's browser is IE.
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*/
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goog.labs.userAgent.browser.isIE = goog.labs.userAgent.browser.matchIE_;
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/**
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* @return {boolean} Whether the user's browser is Firefox.
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*/
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goog.labs.userAgent.browser.isFirefox =
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goog.labs.userAgent.browser.matchFirefox_;
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/**
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* @return {boolean} Whether the user's browser is Safari.
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*/
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goog.labs.userAgent.browser.isSafari =
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goog.labs.userAgent.browser.matchSafari_;
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/**
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* @return {boolean} Whether the user's browser is Chrome.
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*/
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goog.labs.userAgent.browser.isChrome =
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goog.labs.userAgent.browser.matchChrome_;
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/**
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* @return {boolean} Whether the user's browser is the Android browser.
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*/
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goog.labs.userAgent.browser.isAndroidBrowser =
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goog.labs.userAgent.browser.matchAndroidBrowser_;
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/**
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* For more information, see:
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* http://docs.aws.amazon.com/silk/latest/developerguide/user-agent.html
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* @return {boolean} Whether the user's browser is Silk.
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*/
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goog.labs.userAgent.browser.isSilk = function() {
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return goog.labs.userAgent.util.matchUserAgent('Silk');
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};
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/**
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* @return {string} The browser version or empty string if version cannot be
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* determined. Note that for Internet Explorer, this returns the version of
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* the browser, not the version of the rendering engine. (IE 8 in
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* compatibility mode will return 8.0 rather than 7.0. To determine the
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* rendering engine version, look at document.documentMode instead. See
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* http://msdn.microsoft.com/en-us/library/cc196988(v=vs.85).aspx for more
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* details.)
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*/
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goog.labs.userAgent.browser.getVersion = function() {
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var userAgentString = goog.labs.userAgent.util.getUserAgent();
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// Special case IE since IE's version is inside the parenthesis and
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// without the '/'.
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if (goog.labs.userAgent.browser.isIE()) {
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return goog.labs.userAgent.browser.getIEVersion_(userAgentString);
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}
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if (goog.labs.userAgent.browser.isOpera()) {
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return goog.labs.userAgent.browser.getOperaVersion_(userAgentString);
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}
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var versionTuples =
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goog.labs.userAgent.util.extractVersionTuples(userAgentString);
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return goog.labs.userAgent.browser.getVersionFromTuples_(versionTuples);
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};
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/**
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* @param {string|number} version The version to check.
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* @return {boolean} Whether the browser version is higher or the same as the
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* given version.
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*/
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goog.labs.userAgent.browser.isVersionOrHigher = function(version) {
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return goog.string.compareVersions(goog.labs.userAgent.browser.getVersion(),
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version) >= 0;
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};
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/**
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* Determines IE version. More information:
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* http://msdn.microsoft.com/en-us/library/ie/bg182625(v=vs.85).aspx#uaString
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* http://msdn.microsoft.com/en-us/library/hh869301(v=vs.85).aspx
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* http://blogs.msdn.com/b/ie/archive/2010/03/23/introducing-ie9-s-user-agent-string.aspx
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* http://blogs.msdn.com/b/ie/archive/2009/01/09/the-internet-explorer-8-user-agent-string-updated-edition.aspx
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*
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* @param {string} userAgent the User-Agent.
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* @return {string}
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* @private
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*/
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goog.labs.userAgent.browser.getIEVersion_ = function(userAgent) {
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// IE11 may identify itself as MSIE 9.0 or MSIE 10.0 due to an IE 11 upgrade
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// bug. Example UA:
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// Mozilla/5.0 (MSIE 9.0; Windows NT 6.1; WOW64; Trident/7.0; rv:11.0)
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// like Gecko.
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// See http://www.whatismybrowser.com/developers/unknown-user-agent-fragments.
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var rv = /rv: *([\d\.]*)/.exec(userAgent);
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if (rv && rv[1]) {
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return rv[1];
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}
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var version = '';
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var msie = /MSIE +([\d\.]+)/.exec(userAgent);
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if (msie && msie[1]) {
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// IE in compatibility mode usually identifies itself as MSIE 7.0; in this
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// case, use the Trident version to determine the version of IE. For more
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// details, see the links above.
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var tridentVersion = /Trident\/(\d.\d)/.exec(userAgent);
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if (msie[1] == '7.0') {
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if (tridentVersion && tridentVersion[1]) {
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switch (tridentVersion[1]) {
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case '4.0':
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version = '8.0';
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break;
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case '5.0':
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version = '9.0';
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break;
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case '6.0':
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version = '10.0';
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break;
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case '7.0':
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version = '11.0';
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break;
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}
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} else {
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version = '7.0';
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}
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} else {
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version = msie[1];
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}
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}
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return version;
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};
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/**
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* Determines Opera version. More information:
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* http://my.opera.com/ODIN/blog/2013/07/15/opera-user-agent-strings-opera-15-and-beyond
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*
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* @param {string} userAgent The User-Agent.
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* @return {string}
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* @private
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*/
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goog.labs.userAgent.browser.getOperaVersion_ = function(userAgent) {
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var versionTuples =
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goog.labs.userAgent.util.extractVersionTuples(userAgent);
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var lastTuple = goog.array.peek(versionTuples);
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if (lastTuple[0] == 'OPR' && lastTuple[1]) {
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return lastTuple[1];
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}
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return goog.labs.userAgent.browser.getVersionFromTuples_(versionTuples);
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};
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/**
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* Nearly all User-Agents start with Mozilla/N.0. This looks at the second tuple
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* for the actual browser version number.
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* @param {!Array.<!Array.<string>>} versionTuples
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* @return {string} The version or empty string if it cannot be determined.
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* @private
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*/
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goog.labs.userAgent.browser.getVersionFromTuples_ = function(versionTuples) {
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// versionTuples[2] (The first X/Y tuple after the parenthesis) contains the
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// browser version number.
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goog.asserts.assert(versionTuples.length > 2,
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'Couldn\'t extract version tuple from user agent string');
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return versionTuples[2] && versionTuples[2][1] ? versionTuples[2][1] : '';
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};
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