resources/mediawiki.util/mediawiki.util.js

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