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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 Utilities used by goog.labs.userAgent tools. These functions
* should not be used outside of goog.labs.userAgent.*.
*
*
* @author nnaze@google.com (Nathan Naze)
*/
goog.provide('goog.labs.userAgent.util');
goog.require('goog.string');
/**
* Gets the native userAgent string from navigator if it exists.
* If navigator or navigator.userAgent string is missing, returns an empty
* string.
* @return {string}
* @private
*/
goog.labs.userAgent.util.getNativeUserAgentString_ = function() {
var navigator = goog.labs.userAgent.util.getNavigator_();
if (navigator) {
var userAgent = navigator.userAgent;
if (userAgent) {
return userAgent;
}
}
return '';
};
/**
* Getter for the native navigator.
* This is a separate function so it can be stubbed out in testing.
* @return {Navigator}
* @private
*/
goog.labs.userAgent.util.getNavigator_ = function() {
return goog.global.navigator;
};
/**
* A possible override for applications which wish to not check
* navigator.userAgent but use a specified value for detection instead.
* @private {string}
*/
goog.labs.userAgent.util.userAgent_ =
goog.labs.userAgent.util.getNativeUserAgentString_();
/**
* Applications may override browser detection on the built in
* navigator.userAgent object by setting this string. Set to null to use the
* browser object instead.
* @param {?string=} opt_userAgent The User-Agent override.
*/
goog.labs.userAgent.util.setUserAgent = function(opt_userAgent) {
goog.labs.userAgent.util.userAgent_ =
opt_userAgent || goog.labs.userAgent.util.getNativeUserAgentString_();
};
/**
* @return {string} The user agent string.
*/
goog.labs.userAgent.util.getUserAgent = function() {
return goog.labs.userAgent.util.userAgent_;
};
/**
* @param {string} str
* @return {boolean} Whether the user agent contains the given string.
*/
goog.labs.userAgent.util.matchUserAgent = function(str) {
var userAgent = goog.labs.userAgent.util.getUserAgent();
return goog.string.contains(userAgent, str);
};
/**
* @param {string} str
* @return {boolean} Whether the user agent contains the given string, ignoring
* case.
*/
goog.labs.userAgent.util.matchUserAgentIgnoreCase = function(str) {
var userAgent = goog.labs.userAgent.util.getUserAgent();
return goog.string.caseInsensitiveContains(userAgent, str);
};
/**
* Parses the user agent into tuples for each section.
* @param {string} userAgent
* @return {!Array<!Array<string>>} Tuples of key, version, and the contents
* of the parenthetical.
*/
goog.labs.userAgent.util.extractVersionTuples = function(userAgent) {
// Matches each section of a user agent string.
// Example UA:
// Mozilla/5.0 (iPad; U; CPU OS 3_2_1 like Mac OS X; en-us)
// AppleWebKit/531.21.10 (KHTML, like Gecko) Mobile/7B405
// This has three version tuples: Mozilla, AppleWebKit, and Mobile.
var versionRegExp = new RegExp(
// Key. Note that a key may have a space.
// (i.e. 'Mobile Safari' in 'Mobile Safari/5.0')
'(\\w[\\w ]+)' +
'/' + // slash
'([^\\s]+)' + // version (i.e. '5.0b')
'\\s*' + // whitespace
'(?:\\((.*?)\\))?', // parenthetical info. parentheses not matched.
'g');
var data = [];
var match;
// Iterate and collect the version tuples. Each iteration will be the
// next regex match.
while (match = versionRegExp.exec(userAgent)) {
data.push([
match[1], // key
match[2], // value
// || undefined as this is not undefined in IE7 and IE8
match[3] || undefined // info
]);
}
return data;
};
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