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/**
* User-agent detection
*/
( function ( $ ) {
/* Private Members */
/**
* @var profileCache {Object} Keyed by userAgent string,
* value is the parsed $.client.profile object for that user agent.
*/
var profileCache = {};
/* Public Methods */
$.client = {
/**
* Get an object containing information about the client.
*
* @param nav {Object} An object with atleast a 'userAgent' and 'platform' key.
* Defaults to the global Navigator object.
* @return {Object} The resulting client object will be in the following format:
* {
* 'name': 'firefox',
* 'layout': 'gecko',
* 'layoutVersion': 20101026,
* 'platform': 'linux'
* 'version': '3.5.1',
* 'versionBase': '3',
* 'versionNumber': 3.5,
* }
*/
profile: function ( nav ) {
/*jshint boss: true */
if ( nav === undefined ) {
nav = window.navigator;
}
// Use the cached version if possible
if ( profileCache[nav.userAgent] === undefined ) {
/* Configuration */
// Name of browsers or layout engines we don't recognize
var uk = 'unknown';
// Generic version digit
var x = 'x';
// Strings found in user agent strings that need to be conformed
var wildUserAgents = ['Opera', 'Navigator', 'Minefield', 'KHTML', 'Chrome', 'PLAYSTATION 3'];
// Translations for conforming user agent strings
var userAgentTranslations = [
// Tons of browsers lie about being something they are not
[/(Firefox|MSIE|KHTML,\slike\sGecko|Konqueror)/, ''],
// Chrome lives in the shadow of Safari still
['Chrome Safari', 'Chrome'],
// KHTML is the layout engine not the browser - LIES!
['KHTML', 'Konqueror'],
// Firefox nightly builds
['Minefield', 'Firefox'],
// This helps keep differnt versions consistent
['Navigator', 'Netscape'],
// This prevents version extraction issues, otherwise translation would happen later
['PLAYSTATION 3', 'PS3']
];
// Strings which precede a version number in a user agent string - combined and used as match 1 in
// version detectection
var versionPrefixes = [
'camino', 'chrome', 'firefox', 'netscape', 'netscape6', 'opera', 'version', 'konqueror',
'lynx', 'msie', 'safari', 'ps3'
];
// Used as matches 2, 3 and 4 in version extraction - 3 is used as actual version number
var versionSuffix = '(\\/|\\;?\\s|)([a-z0-9\\.\\+]*?)(\\;|dev|rel|\\)|\\s|$)';
// Names of known browsers
var names = [
'camino', 'chrome', 'firefox', 'netscape', 'konqueror', 'lynx', 'msie', 'opera',
'safari', 'ipod', 'iphone', 'blackberry', 'ps3', 'rekonq'
];
// Tanslations for conforming browser names
var nameTranslations = [];
// Names of known layout engines
var layouts = ['gecko', 'konqueror', 'msie', 'opera', 'webkit'];
// Translations for conforming layout names
var layoutTranslations = [['konqueror', 'khtml'], ['msie', 'trident'], ['opera', 'presto']];
// Names of supported layout engines for version number
var layoutVersions = ['applewebkit', 'gecko'];
// Names of known operating systems
var platforms = ['win', 'mac', 'linux', 'sunos', 'solaris', 'iphone'];
// Translations for conforming operating system names
var platformTranslations = [['sunos', 'solaris']];
/* Methods */
/**
* Performs multiple replacements on a string
*/
var translate = function ( source, translations ) {
var i;
for ( i = 0; i < translations.length; i++ ) {
source = source.replace( translations[i][0], translations[i][1] );
}
return source;
};
/* Pre-processing */
var ua = nav.userAgent,
match,
name = uk,
layout = uk,
layoutversion = uk,
platform = uk,
version = x;
if ( match = new RegExp( '(' + wildUserAgents.join( '|' ) + ')' ).exec( ua ) ) {
// Takes a userAgent string and translates given text into something we can more easily work with
ua = translate( ua, userAgentTranslations );
}
// Everything will be in lowercase from now on
ua = ua.toLowerCase();
/* Extraction */
if ( match = new RegExp( '(' + names.join( '|' ) + ')' ).exec( ua ) ) {
name = translate( match[1], nameTranslations );
}
if ( match = new RegExp( '(' + layouts.join( '|' ) + ')' ).exec( ua ) ) {
layout = translate( match[1], layoutTranslations );
}
if ( match = new RegExp( '(' + layoutVersions.join( '|' ) + ')\\\/(\\d+)').exec( ua ) ) {
layoutversion = parseInt( match[2], 10 );
}
if ( match = new RegExp( '(' + platforms.join( '|' ) + ')' ).exec( nav.platform.toLowerCase() ) ) {
platform = translate( match[1], platformTranslations );
}
if ( match = new RegExp( '(' + versionPrefixes.join( '|' ) + ')' + versionSuffix ).exec( ua ) ) {
version = match[3];
}
/* Edge Cases -- did I mention about how user agent string lie? */
// Decode Safari's crazy 400+ version numbers
if ( name.match( /safari/ ) && version > 400 ) {
version = '2.0';
}
// Expose Opera 10's lies about being Opera 9.8
if ( name === 'opera' && version >= 9.8) {
version = ua.match( /version\/([0-9\.]*)/i )[1] || 10;
}
var versionNumber = parseFloat( version, 10 ) || 0.0;
/* Caching */
profileCache[nav.userAgent] = {
name: name,
layout: layout,
layoutVersion: layoutversion,
platform: platform,
version: version,
versionBase: ( version !== x ? Math.floor( versionNumber ).toString() : x ),
versionNumber: versionNumber
};
}
return profileCache[nav.userAgent];
},
/**
* Checks the current browser against a support map object to determine if the browser has been black-listed or
* not. If the browser was not configured specifically it is assumed to work. It is assumed that the body
* element is classified as either "ltr" or "rtl". If neither is set, "ltr" is assumed.
*
* A browser map is in the following format:
* {
* 'ltr': {
* // Multiple rules with configurable operators
* 'msie': [['>=', 7], ['!=', 9]],
* // Blocked entirely
* 'iphone': false
* },
* 'rtl': {
* // Test against a string
* 'msie': [['!==', '8.1.2.3']],
* // RTL rules do not fall through to LTR rules, you must explicity set each of them
* 'iphone': false
* }
* }
*
* @param map {Object} Browser support map
* @param profile {Object} (optional) a client-profile object.
*
* @return Boolean true if browser known or assumed to be supported, false if blacklisted
*/
test: function ( map, profile ) {
/*jshint evil:true */
var conditions, dir, i, op, val;
profile = $.isPlainObject( profile ) ? profile : $.client.profile();
dir = $( 'body' ).is( '.rtl' ) ? 'rtl' : 'ltr';
// Check over each browser condition to determine if we are running in a compatible client
if ( typeof map[dir] !== 'object' || map[dir][profile.name] === undefined ) {
// Unknown, so we assume it's working
return true;
}
conditions = map[dir][profile.name];
for ( i = 0; i < conditions.length; i++ ) {
op = conditions[i][0];
val = conditions[i][1];
if ( val === false ) {
return false;
}
if ( typeof val === 'string' ) {
if ( !( eval( 'profile.version' + op + '"' + val + '"' ) ) ) {
return false;
}
} else if ( typeof val === 'number' ) {
if ( !( eval( 'profile.versionNumber' + op + val ) ) ) {
return false;
}
}
}
return true;
}
};
}( jQuery ) );
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