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/*
* User-agent detection
*/
( function( $ ) {
$.client = new ( function() {
/* Private Members */
var profile;
/* Public Functions */
/**
* Returns an object containing information about the browser
*
* The resulting client object will be in the following format:
* {
* 'name': 'firefox',
* 'layout': 'gecko',
* 'layoutVersion': '20101026',
* 'platform': 'linux'
* 'version': '3.5.1',
* 'versionBase': '3',
* 'versionNumber': 3.5,
* }
*/
this.profile = function() {
// Use the cached version if possible
if ( typeof profile === 'undefined' ) {
/* Configuration */
// Name of browsers or layout engines we don't recognize
var uk = 'unknown';
// Generic version digit
var x = 'x';
// Strings found in user agent strings that need to be conformed
var wildUserAgents = [ 'Opera', 'Navigator', 'Minefield', 'KHTML', 'Chrome', 'PLAYSTATION 3'];
// Translations for conforming user agent strings
var userAgentTranslations = [
// Tons of browsers lie about being something they are not
[/(Firefox|MSIE|KHTML,\slike\sGecko|Konqueror)/, ''],
// Chrome lives in the shadow of Safari still
['Chrome Safari', 'Chrome'],
// KHTML is the layout engine not the browser - LIES!
['KHTML', 'Konqueror'],
// Firefox nightly builds
['Minefield', 'Firefox'],
// This helps keep differnt versions consistent
['Navigator', 'Netscape'],
// This prevents version extraction issues, otherwise translation would happen later
['PLAYSTATION 3', 'PS3'],
];
// Strings which precede a version number in a user agent string - combined and used as match 1 in
// version detectection
var versionPrefixes = [
'camino', 'chrome', 'firefox', 'netscape', 'netscape6', 'opera', 'version', 'konqueror', 'lynx',
'msie', 'safari', 'ps3'
];
// Used as matches 2, 3 and 4 in version extraction - 3 is used as actual version number
var versionSuffix = '(\\/|\\;?\\s|)([a-z0-9\\.\\+]*?)(\\;|dev|rel|\\)|\\s|$)';
// Names of known browsers
var names = [
'camino', 'chrome', 'firefox', 'netscape', 'konqueror', 'lynx', 'msie', 'opera', 'safari', 'ipod',
'iphone', 'blackberry', 'ps3'
];
// 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
function translate( source, translations ) {
for ( var i = 0; i < translations.length; i++ ) {
source = source.replace( translations[i][0], translations[i][1] );
}
return source;
};
/* Pre-processing */
var userAgent = navigator.userAgent, match, name = uk, layout = uk, layoutversion = uk, platform = uk, version = x;
if ( match = new RegExp( '(' + wildUserAgents.join( '|' ) + ')' ).exec( userAgent ) ) {
// Takes a userAgent string and translates given text into something we can more easily work with
userAgent = translate( userAgent, userAgentTranslations );
}
// Everything will be in lowercase from now on
userAgent = userAgent.toLowerCase();
/* Extraction */
if ( match = new RegExp( '(' + names.join( '|' ) + ')' ).exec( userAgent ) ) {
name = translate( match[1], nameTranslations );
}
if ( match = new RegExp( '(' + layouts.join( '|' ) + ')' ).exec( userAgent ) ) {
layout = translate( match[1], layoutTranslations );
}
if ( match = new RegExp( '(' + layoutVersions.join( '|' ) + ')\\\/(\\d+)').exec( navigator.userAgent.toLowerCase() ) ) {
layoutversion = parseInt(match[2]);
}
if ( match = new RegExp( '(' + platforms.join( '|' ) + ')' ).exec( navigator.platform.toLowerCase() ) ) {
platform = translate( match[1], platformTranslations );
}
if ( match = new RegExp( '(' + versionPrefixes.join( '|' ) + ')' + versionSuffix ).exec( userAgent ) ) {
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 = userAgent.match( /version\/([0-9\.]*)/i )[1] || 10;
}
/* Caching */
profile = {
'name': name,
'layout': layout,
'layoutVersion': layoutversion,
'platform': platform,
'version': version,
'versionBase': ( version !== x ? new String( version ).substr( 0, 1 ) : x ),
'versionNumber': ( parseFloat( version, 10 ) || 0.0 )
};
}
return profile;
};
/**
* 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 of browser support map
*
* @return Boolean true if browser known or assumed to be supported, false if blacklisted
*/
this.test = function( map ) {
var profile = jQuery.client.profile();
var dir = jQuery( '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' || typeof map[dir][profile.name] === 'undefined' ) {
// Unknown, so we assume it's working
return true;
}
var name = map[dir][profile.name];
for ( var condition in name ) {
var op = name[condition][0];
var val = name[condition][1];
if ( val === false ) {
return false;
} else 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;
}
} )();
$( document ).ready( function() {
var profile = $.client.profile();
$( 'html' )
.addClass( 'client-' + profile.name )
.addClass( 'client-' + profile.name + '-' + profile.versionBase )
.addClass( 'client-' + profile.layout )
.addClass( 'client-' + profile.platform );
} );
} )( jQuery );
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