resources/mediawiki/mediawiki.util.js

   1 /**
   2  * Utilities
   3  */
   4 ( function( $ ) {
   5
   6         // Local cache and alias
   7         var util = mw.util = {
   8
   9                 /* Initialisation */
  10                 /**
  11                  * @var boolean Wether or not already initialised
  12                  */
  13                 'initialised' : false,
  14                 'init' : function() {
  15                         if ( this.initialised === false ) {
  16                                 this.initialised = true;
  17
  18                                 // Following the initialisation after the DOM is ready
  19                                 $(document).ready( function() {
  20
  21                                         /* Set up $.messageBox */
  22                                         $.messageBoxNew( {
  23                                                 'id': 'mw-js-message',
  24                                                 'parent': '#content'
  25                                         } );
  26
  27                                         // Shortcut to client profile return
  28                                         var profile = $.client.profile();
  29
  30                                         /* Set tooltipAccessKeyPrefix */
  31
  32                                         // Opera on any platform
  33                                         if ( profile.name == 'opera' ) {
  34                                                 util.tooltipAccessKeyPrefix = 'shift-esc-';
  35
  36                                         // Chrome on any platform
  37                                         } else if ( profile.name == 'chrome' ) {
  38                                                 // Chrome on Mac or Chrome on other platform ?
  39                                                 util.tooltipAccessKeyPrefix = ( profile.platform == 'mac'
  40                                                         ? 'ctrl-option-' : 'alt-' );
  41
  42                                         // Non-Windows Safari with webkit_version > 526
  43                                         } else if ( profile.platform !== 'win'
  44                                                 && profile.name == 'safari'
  45                                                 && profile.layoutVersion > 526 ) {
  46                                                 util.tooltipAccessKeyPrefix = 'ctrl-alt-';
  47
  48                                         // Safari/Konqueror on any platform, or any browser on Mac
  49                                         // (but not Safari on Windows)
  50                                         } else if ( !( profile.platform == 'win' && profile.name == 'safari' )
  51                                                                         && ( profile.name == 'safari'
  52                                                                         || profile.platform == 'mac'
  53                                                                         || profile.name == 'konqueror' ) ) {
  54                                                 util.tooltipAccessKeyPrefix = 'ctrl-';
  55
  56                                         // Firefox 2.x and later
  57                                         } else if ( profile.name == 'firefox' && profile.versionBase > '1' ) {
  58                                                 util.tooltipAccessKeyPrefix = 'alt-shift-';
  59                                         }
  60
  61                                         /* Fill $content var */
  62                                         if ( $( '#bodyContent' ).length ) {
  63                                                 // Vector, Monobook, Chick etc.
  64                                                 util.$content = $( '#bodyContent' );
  65
  66                                         } else if ( $( '#mw_contentholder' ).length ) {
  67                                                 // Modern
  68                                                 util.$content = $( '#mw_contentholder' );
  69
  70                                         } else if ( $( '#article' ).length ) {
  71                                                 // Standard, CologneBlue
  72                                                 util.$content = $( '#article' );
  73
  74                                         } else {
  75                                                 // #content is present on almost all if not all skins. Most skins (the above cases)
  76                                                 // have #content too, but as an outer wrapper instead of the article text container.
  77                                                 // The skins that don't have an outer wrapper do have #content for everything
  78                                                 // so it's a good fallback
  79                                                 util.$content = $( '#content' );
  80                                         }
  81
  82                                         /* Table of Contents toggle */
  83                                         var     $tocContainer = $( '#toc' ),
  84                                                 $tocTitle = $( '#toctitle' ),
  85                                                 $tocToggleLink = $( '#togglelink' );
  86                                         // Only add it if there is a TOC and there is no toggle added already
  87                                         if ( $tocContainer.length && $tocTitle.length && !$tocToggleLink.length ) {
  88                                                 var     hideTocCookie = $.cookie( 'mw_hidetoc' );
  89                                                         $tocToggleLink = $( '<a href="#" class="internal" id="togglelink"></a>' )
  90                                                                 .text( mw.msg( 'hidetoc' ) )
  91                                                                 .click( function(e){
  92                                                                         e.preventDefault();
  93                                                                         util.toggleToc( $(this) );
  94                                                         } );
  95                                                 $tocTitle.append( $tocToggleLink.wrap( '<span class="toctoggle"></span>' ).parent().prepend( '&nbsp;[' ).append( ']&nbsp;' ) );
  96
  97                                                 if ( hideTocCookie == '1' ) {
  98                                                         // Cookie says user want toc hidden
  99                                                         $tocToggleLink.click();
 100                                                 }
 101                                         }
 102                                 } );
 103
 104                                 return true;
 105                         }
 106                         return false;
 107                 },
 108
 109                 /* Main body */
 110
 111                 /**
 112                  * Encode the string like PHP's rawurlencode
 113                  *
 114                  * @param str string String to be encoded
 115                  */
 116                 'rawurlencode' : function( str ) {
 117                         str = ( str + '' ).toString();
 118                         return encodeURIComponent( str )
 119                                 .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
 120                                 .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
 121                 },
 122
 123                 /**
 124                  * Encode page titles for use in a URL
 125                  * We want / and : to be included as literal characters in our title URLs
 126                  * as they otherwise fatally break the title
 127                  *
 128                  * @param str string String to be encoded
 129                  */
 130                 'wikiUrlencode' : function( str ) {
 131                         return this.rawurlencode( str )
 132                                 .replace( /%20/g, '_' ).replace( /%3A/g, ':' ).replace( /%2F/g, '/' );
 133                 },
 134
 135                 /**
 136                  * Get the link to a page name (relative to wgServer)
 137                  *
 138                  * @param str string Page name to get the link for.
 139                  * @return string Location for a page with name of 'str' or boolean false on error.
 140                  */
 141                 'wikiGetlink' : function( str ) {
 142                         return mw.config.get( 'wgArticlePath' ).replace( '$1',
 143                                 this.wikiUrlencode( str || mw.config.get( 'wgPageName' ) ) );
 144                 },
 145
 146                 /**
 147                  * Get address to a script in the wiki root.
 148                  * For index.php use mw.config.get( 'wgScript' )
 149                  *
 150                  * @param str string Name of script (eg. 'api'), defaults to 'index'
 151                  * @return string Address to script (eg. '/w/api.php' )
 152                  */
 153                 'wikiScript' : function( str ) {
 154                         return mw.config.get( 'wgScriptPath' ) + '/' + ( str || 'index' ) + mw.config.get( 'wgScriptExtension' );
 155                 },
 156
 157                 /**
 158                  * Append a new style block to the head
 159                  *
 160                  * @param text string CSS to be appended
 161                  * @return CSSStyleSheet
 162                  */
 163                 'addCSS' : function( text ) {
 164                         var s = document.createElement( 'style' );
 165                         s.type = 'text/css';
 166                         s.rel = 'stylesheet';
 167                         if ( s.styleSheet ) {
 168                                 s.styleSheet.cssText = text; // IE
 169                         } else {
 170                                 s.appendChild( document.createTextNode( text + '' ) ); // Safari sometimes borks on null
 171                         }
 172                         document.getElementsByTagName('head')[0].appendChild( s );
 173                         return s.sheet || s;
 174                 },
 175
 176                 /**
 177                  * Hide/show the table of contents element
 178                  *
 179                  * @param $toggleLink jQuery A jQuery object of the toggle link.
 180                  * @param callback function Function to be called after the toggle is
 181                  * completed (including the animation) (optional)
 182                  * @return mixed Boolean visibility of the toc (true if it's visible)
 183                  * or Null if there was no table of contents.
 184                  */
 185                 'toggleToc' : function( $toggleLink, callback ) {
 186                         var $tocList = $( '#toc ul:first' );
 187
 188                         // This function shouldn't be called if there's no TOC,
 189                         // but just in case...
 190                         if ( $tocList.length ) {
 191                                 if ( $tocList.is( ':hidden' ) ) {
 192                                         $tocList.slideDown( 'fast', callback );
 193                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 194                                         $( '#toc' ).removeClass( 'tochidden' );
 195                                         $.cookie( 'mw_hidetoc', null, {
 196                                                 expires: 30,
 197                                                 path: '/'
 198                                         } );
 199                                         return true;
 200                                 } else {
 201                                         $tocList.slideUp( 'fast', callback );
 202                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 203                                         $( '#toc' ).addClass( 'tochidden' );
 204                                         $.cookie( 'mw_hidetoc', '1', {
 205                                                 expires: 30,
 206                                                 path: '/'
 207                                         } );
 208                                         return false;
 209                                 }
 210                         } else {
 211                                 return null;
 212                         }
 213                 },
 214
 215                 /**
 216                  * Grab the URL parameter value for the given parameter.
 217                  * Returns null if not found.
 218                  *
 219                  * @param param string The parameter name.
 220                  * @param url string URL to search through (optional)
 221                  * @return mixed Parameter value or null.
 222                  */
 223                 'getParamValue' : function( param, url ) {
 224                         url = url ? url : document.location.href;
 225                         // Get last match, stop at hash
 226                         var re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' );
 227                         var m = re.exec( url );
 228                         if ( m && m.length > 1 ) {
 229                                 return decodeURIComponent( m[1] );
 230                         }
 231                         return null;
 232                 },
 233
 234                 /**
 235                  * @var string
 236                  * Access key prefix. Will be re-defined based on browser/operating system
 237                  * detection in mw.util.init().
 238                  */
 239                 'tooltipAccessKeyPrefix' : 'alt-',
 240
 241                 /**
 242                  * @var RegExp
 243                  * Regex to match accesskey tooltips.
 244                  */
 245                 'tooltipAccessKeyRegexp': /\[(ctrl-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 246
 247                 /**
 248                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 249                  * If the nodeList parameter is given, only those nodes are updated;
 250                  * otherwise, all the nodes that will probably have accesskeys by
 251                  * default are updated.
 252                  *
 253                  * @param nodeList {Array|jQuery} (optional) A jQuery object, or array of elements to update.
 254                  */
 255                 'updateTooltipAccessKeys' : function( nodeList ) {
 256                         var $nodes;
 257                         if ( !nodeList ) {
 258
 259                                 // Rather than scanning all links, just the elements that
 260                                 // contain the relevant links
 261                                 this.updateTooltipAccessKeys(
 262                                         $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a' ) );
 263
 264                                 // these are rare enough that no such optimization is needed
 265                                 this.updateTooltipAccessKeys( $( 'input' ) );
 266                                 this.updateTooltipAccessKeys( $( 'label' ) );
 267
 268                                 return;
 269
 270                         } else if ( nodeList instanceof $ ) {
 271                                 $nodes = nodeList;
 272                         } else {
 273                                 $nodes = $( nodeList );
 274                         }
 275
 276                         $nodes.each( function ( i ) {
 277                                 var tip = $(this).attr( 'title' );
 278                                 if ( !!tip && util.tooltipAccessKeyRegexp.exec( tip ) ) {
 279                                         tip = tip.replace( util.tooltipAccessKeyRegexp,
 280                                                 '[' + util.tooltipAccessKeyPrefix + "$5]" );
 281                                         $(this).attr( 'title', tip );
 282                                 }
 283                         } );
 284                 },
 285
 286                 /*
 287                  * @var jQuery
 288                  * A jQuery object that refers to the page-content element
 289                  * Populated by init().
 290                  */
 291                 '$content' : null,
 292
 293                 /**
 294                  * Add a link to a portlet menu on the page, such as:
 295                  *
 296                  * p-cactions (Content actions), p-personal (Personal tools),
 297                  * p-navigation (Navigation), p-tb (Toolbox)
 298                  *
 299                  * The first three paramters are required, the others are optional and
 300                  * may be null. Though providing an id and tooltip is recommended.
 301                  *
 302                  * By default the new link will be added to the end of the list. To
 303                  * add the link before a given existing item, pass the DOM node
 304                  * (document.getElementById( 'foobar' )) or the jQuery-selector
 305                  * ( '#foobar' ) of that item.
 306                  *
 307                  * @example mw.util.addPortletLink(
 308                  *       'p-tb', 'http://mediawiki.org/',
 309                  *       'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 310                  * )
 311                  *
 312                  * @param portlet string ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 313                  * @param href string Link URL
 314                  * @param text string Link text
 315                  * @param id string ID of the new item, should be unique and preferably have
 316                  * the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 317                  * @param tooltip string Text to show when hovering over the link, without accesskey suffix
 318                  * @param accesskey string Access key to activate this link (one character, try
 319                  * to avoid conflicts. Use $( '[accesskey=x]' ).get() in the console to
 320                  * see if 'x' is already used.
 321                  * @param nextnode mixed DOM Node or jQuery-selector string of the item that the new
 322                  * item should be added before, should be another item in the same
 323                  * list, it will be ignored otherwise
 324                  *
 325                  * @return mixed The DOM Node of the added item (a ListItem or Anchor element,
 326                  * depending on the skin) or null if no element was added to the document.
 327                  */
 328                 'addPortletLink' : function( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 329
 330                         // Check if there's atleast 3 arguments to prevent a TypeError
 331                         if ( arguments.length < 3 ) {
 332                                 return null;
 333                         }
 334                         // Setup the anchor tag
 335                         var $link = $( '<a></a>' ).attr( 'href', href ).text( text );
 336                         if ( tooltip ) {
 337                                 $link.attr( 'title', tooltip );
 338                         }
 339
 340                         // Some skins don't have any portlets
 341                         // just add it to the bottom of their 'sidebar' element as a fallback
 342                         switch ( mw.config.get( 'skin' ) ) {
 343                         case 'standard' :
 344                         case 'cologneblue' :
 345                                 $( '#quickbar' ).append( $link.after( '<br/>' ) );
 346                                 return $link[0];
 347                         case 'nostalgia' :
 348                                 $( '#searchform' ).before( $link).before( ' &#124; ' );
 349                                 return $link[0];
 350                         default : // Skins like chick, modern, monobook, myskin, simple, vector...
 351
 352                                 // Select the specified portlet
 353                                 var $portlet = $( '#' + portlet );
 354                                 if ( $portlet.length === 0 ) {
 355                                         return null;
 356                                 }
 357                                 // Select the first (most likely only) unordered list inside the portlet
 358                                 var $ul = $portlet.find( 'ul' );
 359
 360                                 // If it didn't have an unordered list yet, create it
 361                                 if ( $ul.length === 0 ) {
 362                                         // If there's no <div> inside, append it to the portlet directly
 363                                         if ( $portlet.find( 'div:first' ).length === 0 ) {
 364                                                 $portlet.append( '<ul></ul>' );
 365                                         } else {
 366                                                 // otherwise if there's a div (such as div.body or div.pBody)
 367                                                 // append the <ul> to last (most likely only) div
 368                                                 $portlet.find( 'div' ).eq( -1 ).append( '<ul></ul>' );
 369                                         }
 370                                         // Select the created element
 371                                         $ul = $portlet.find( 'ul' ).eq( 0 );
 372                                 }
 373                                 // Just in case..
 374                                 if ( $ul.length === 0 ) {
 375                                         return null;
 376                                 }
 377
 378                                 // Unhide portlet if it was hidden before
 379                                 $portlet.removeClass( 'emptyPortlet' );
 380
 381                                 // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 382                                 // and back up the selector to the list item
 383                                 var $item;
 384                                 if ( $portlet.hasClass( 'vectorTabs' ) ) {
 385                                         $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 386                                 } else {
 387                                         $item = $link.wrap( '<li></li>' ).parent();
 388                                 }
 389
 390                                 // Implement the properties passed to the function
 391                                 if ( id ) {
 392                                         $item.attr( 'id', id );
 393                                 }
 394                                 if ( accesskey ) {
 395                                         $link.attr( 'accesskey', accesskey );
 396                                         tooltip += ' [' + accesskey + ']';
 397                                         $link.attr( 'title', tooltip );
 398                                 }
 399                                 if ( accesskey && tooltip ) {
 400                                         this.updateTooltipAccessKeys( $link );
 401                                 }
 402
 403                                 // Where to put our node ?
 404                                 // - nextnode is a DOM element (before MW 1.17, in wikibits.js, this was the only option)
 405                                 if ( nextnode && nextnode.parentNode == $ul[0] ) {
 406                                         $(nextnode).before( $item );
 407
 408                                 // - nextnode is a CSS selector for jQuery
 409                                 } else if ( typeof nextnode == 'string' && $ul.find( nextnode ).length !== 0 ) {
 410                                         $ul.find( nextnode ).eq( 0 ).before( $item );
 411
 412
 413                                 // If the jQuery selector isn't found within the <ul>,
 414                                 // or if nextnode was invalid or not passed at all,
 415                                 // then just append it at the end of the <ul> (this is the default behaviour)
 416                                 } else {
 417                                         $ul.append( $item );
 418                                 }
 419
 420
 421                                 return $item[0];
 422                         }
 423                 },
 424
 425                 /**
 426                  * Add a little box at the top of the screen to inform the user of
 427                  * something, replacing any previous message.
 428                  * Calling with no arguments, with an empty string or null will hide the message
 429                  *
 430                  * @param message mixed The DOM-element or HTML-string to be put inside the message box.
 431                  * @param className     string Used in adding a class; should be different for each call
 432                  * to allow CSS/JS to hide different boxes. null = no class used.
 433                  * @return boolean True on success, false on failure.
 434                  */
 435                 'jsMessage' : function( message, className ) {
 436
 437                         if ( !arguments.length || message === '' || message === null ) {
 438
 439                                 $( '#mw-js-message' ).empty().hide();
 440                                 return true; // Emptying and hiding message is intended behaviour, return true
 441
 442                         } else {
 443                                 // We special-case skin structures provided by the software. Skins that
 444                                 // choose to abandon or significantly modify our formatting can just define
 445                                 // an mw-js-message div to start with.
 446                                 var $messageDiv = $( '#mw-js-message' );
 447                                 if ( !$messageDiv.length ) {
 448                                         $messageDiv = $( '<div id="mw-js-message">' );
 449                                         if ( util.$content.parent().length ) {
 450                                                 util.$content.parent().prepend( $messageDiv );
 451                                         } else {
 452                                                 return false;
 453                                         }
 454                                 }
 455
 456                                 if ( className ) {
 457                                         $messageDiv.attr( 'class', 'mw-js-message-' + className );
 458                                 }
 459
 460                                 if ( typeof message === 'object' ) {
 461                                         $messageDiv.empty();
 462                                         $messageDiv.append( message ); // Append new content
 463                                 } else {
 464                                         $messageDiv.html( message );
 465                                 }
 466
 467                                 $messageDiv.slideDown();
 468                                 return true;
 469                         }
 470                 },
 471
 472                 /**
 473                  * Validate a string as representing a valid e-mail address
 474                  * according to HTML5 specification. Please note the specification
 475                  * does not validate a domain with one character.
 476                  *
 477                  * @todo FIXME: should be moved to or replaced by a JavaScript validation module.
 478                  *
 479                  * @param mailtxt string E-mail address to be validated.
 480                  * @return mixed Null if mailtxt was an empty string, otherwise true/false
 481                  * is determined by validation.
 482                  */
 483                 'validateEmail' : function( mailtxt ) {
 484                         if( mailtxt === '' ) {
 485                                 return null;
 486                         }
 487
 488                         /**
 489                          * HTML5 defines a string as valid e-mail address if it matches
 490                          * the ABNF:
 491                          *      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 492                          * With:
 493                          * - atext      : defined in RFC 5322 section 3.2.3
 494                          * - ldh-str : defined in RFC 1034 section 3.5
 495                          *
 496                          * (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68):
 497                          */
 498
 499                         /**
 500                          * First, define the RFC 5322 'atext' which is pretty easy :
 501                          * atext = ALPHA / DIGIT / ; Printable US-ASCII
 502                                                  "!" / "#" /     ; characters not including
 503                                                  "$" / "%" /     ; specials. Used for atoms.
 504                                                  "&" / "'" /
 505                                                  "*" / "+" /
 506                                                  "-" / "/" /
 507                                                  "=" / "?" /
 508                                                  "^" / "_" /
 509                                                  "`" / "{" /
 510                                                  "|" / "}" /
 511                                                  "~"
 512                         */
 513                         var     rfc5322_atext = "a-z0-9!#$%&'*+\\-/=?^_`{|}~",
 514
 515                         /**
 516                          * Next define the RFC 1034 'ldh-str'
 517                          *      <domain> ::= <subdomain> | " "
 518                          *      <subdomain> ::= <label> | <subdomain> "." <label>
 519                          *      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 520                          *      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 521                          *      <let-dig-hyp> ::= <let-dig> | "-"
 522                          *      <let-dig> ::= <letter> | <digit>
 523                          */
 524                                 rfc1034_ldh_str = "a-z0-9\\-",
 525
 526                                 HTML5_email_regexp = new RegExp(
 527                                         // start of string
 528                                         '^'
 529                                         +
 530                                         // User part which is liberal :p
 531                                         '[' + rfc5322_atext + '\\.]+'
 532                                         +
 533                                         // 'at'
 534                                         '@'
 535                                         +
 536                                         // Domain first part
 537                                         '[' + rfc1034_ldh_str + ']+'
 538                                         +
 539                                         // Optional second part and following are separated by a dot
 540                                         '(?:\\.[' + rfc1034_ldh_str + ']+)*'
 541                                         +
 542                                         // End of string
 543                                         '$',
 544                                         // RegExp is case insensitive
 545                                         'i'
 546                                 );
 547                         return (null !== mailtxt.match( HTML5_email_regexp ) );
 548                 },
 549
 550                 /**
 551                  * Note: borrows from IP::isIPv4
 552                  *
 553                  * @param address string
 554                  * @param allowBlock boolean
 555                  * @return boolean
 556                  */
 557                 'isIPv4Address' : function( address, allowBlock ) {
 558                         if ( typeof address !== 'string' ) {
 559                                 return false;
 560                         }
 561                         var block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '';
 562                         var RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])';
 563                         var RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 564                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) != -1;
 565                 },
 566                 /**
 567                  * Note: borrows from IP::isIPv6
 568                  *
 569                  * @param address string
 570                  * @param allowBlock boolean
 571                  * @return boolean
 572                  */
 573                 'isIPv6Address' : function( address, allowBlock ) {
 574                         if ( typeof address !== 'string' ) {
 575                                 return false;
 576                         }
 577                         var block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '';
 578                         var RE_IPV6_ADD =
 579                         '(?:' + // starts with "::" (including "::")
 580                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 581                         '|' + // ends with "::" (except "::")
 582                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 583                         '|' + // contains no "::"
 584                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 585                         ')';
 586                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) != -1 ) {
 587                                 return true;
 588                         }
 589                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 590                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 591                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) != -1
 592                                 && address.search( /::/ ) != -1 && address.search( /::.*::/ ) == -1;
 593                 }
 594
 595         };
 596
 597         util.init();
 598
 599 } )( jQuery );