resources/mediawiki/mediawiki.util.js

   1 ( function ( mw, $ ) {
   2         'use strict';
   3
   4         /**
   5          * Utility library
   6          * @class mw.util
   7          * @singleton
   8          */
   9         var util = {
  10
  11                 /**
  12                  * Initialisation
  13                  * (don't call before document ready)
  14                  */
  15                 init: function () {
  16                         var profile, $tocTitle, $tocToggleLink, hideTocCookie;
  17
  18                         /* Set tooltipAccessKeyPrefix */
  19                         profile = $.client.profile();
  20
  21                         // Opera on any platform
  22                         if ( profile.name === 'opera' ) {
  23                                 util.tooltipAccessKeyPrefix = 'shift-esc-';
  24
  25                         // Chrome on any platform
  26                         } else if ( profile.name === 'chrome' ) {
  27
  28                                 util.tooltipAccessKeyPrefix = (
  29                                         profile.platform === 'mac'
  30                                                 // Chrome on Mac
  31                                                 ? 'ctrl-option-'
  32                                                 // Chrome on Windows or Linux
  33                                                 // (both alt- and alt-shift work, but alt with E, D, F etc does not
  34                                                 // work since they are browser shortcuts)
  35                                                 : 'alt-shift-'
  36                                 );
  37
  38                         // Non-Windows Safari with webkit_version > 526
  39                         } else if ( profile.platform !== 'win'
  40                                 && profile.name === 'safari'
  41                                 && profile.layoutVersion > 526 ) {
  42                                 util.tooltipAccessKeyPrefix = 'ctrl-alt-';
  43                         // Firefox 14+ on Mac
  44                         } else if ( profile.platform === 'mac'
  45                                 && profile.name === 'firefox'
  46                                 && profile.versionNumber >= 14 ) {
  47                                 util.tooltipAccessKeyPrefix = 'ctrl-option-';
  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 $content var */
  62                         util.$content = ( function () {
  63                                 var i, l, $content, selectors;
  64                                 selectors = [
  65                                         // The preferred standard for setting $content (class="mw-body")
  66                                         // You may also use (class="mw-body mw-body-primary") if you use
  67                                         // mw-body in multiple locations.
  68                                         // Or class="mw-body-primary" if you want $content to be deeper
  69                                         // in the dom than mw-body
  70                                         '.mw-body-primary',
  71                                         '.mw-body',
  72
  73                                         /* Legacy fallbacks for setting the content */
  74                                         // Vector, Monobook, Chick, etc... based skins
  75                                         '#bodyContent',
  76
  77                                         // Modern based skins
  78                                         '#mw_contentholder',
  79
  80                                         // Standard, CologneBlue
  81                                         '#article',
  82
  83                                         // #content is present on almost all if not all skins. Most skins (the above cases)
  84                                         // have #content too, but as an outer wrapper instead of the article text container.
  85                                         // The skins that don't have an outer wrapper do have #content for everything
  86                                         // so it's a good fallback
  87                                         '#content',
  88
  89                                         // If nothing better is found fall back to our bodytext div that is guaranteed to be here
  90                                         '#mw-content-text',
  91
  92                                         // Should never happen... well, it could if someone is not finished writing a skin and has
  93                                         // not inserted bodytext yet. But in any case <body> should always exist
  94                                         'body'
  95                                 ];
  96                                 for ( i = 0, l = selectors.length; i < l; i++ ) {
  97                                         $content = $( selectors[i] ).first();
  98                                         if ( $content.length ) {
  99                                                 return $content;
 100                                         }
 101                                 }
 102
 103                                 // Make sure we don't unset util.$content if it was preset and we don't find anything
 104                                 return util.$content;
 105                         } )();
 106
 107                         mw.hook( 'wikipage.content' ).fire( util.$content );
 108
 109                         // Table of contents toggle
 110                         $tocTitle = $( '#toctitle' );
 111                         $tocToggleLink = $( '#togglelink' );
 112                         // Only add it if there is a TOC and there is no toggle added already
 113                         if ( $( '#toc' ).length && $tocTitle.length && !$tocToggleLink.length ) {
 114                                 hideTocCookie = $.cookie( 'mw_hidetoc' );
 115                                         $tocToggleLink = $( '<a href="#" class="internal" id="togglelink"></a>' )
 116                                                 .text( mw.msg( 'hidetoc' ) )
 117                                                 .click( function ( e ) {
 118                                                         e.preventDefault();
 119                                                         util.toggleToc( $(this) );
 120                                                 } );
 121                                 $tocTitle.append(
 122                                         $tocToggleLink
 123                                                 .wrap( '<span class="toctoggle"></span>' )
 124                                                 .parent()
 125                                                         .prepend( '&nbsp;[' )
 126                                                         .append( ']&nbsp;' )
 127                                 );
 128
 129                                 if ( hideTocCookie === '1' ) {
 130                                         util.toggleToc( $tocToggleLink );
 131                                 }
 132                         }
 133                 },
 134
 135                 /* Main body */
 136
 137                 /**
 138                  * Encode the string like PHP's rawurlencode
 139                  *
 140                  * @param {string} str String to be encoded.
 141                  */
 142                 rawurlencode: function ( str ) {
 143                         str = String( str );
 144                         return encodeURIComponent( str )
 145                                 .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
 146                                 .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
 147                 },
 148
 149                 /**
 150                  * Encode page titles for use in a URL
 151                  * We want / and : to be included as literal characters in our title URLs
 152                  * as they otherwise fatally break the title
 153                  *
 154                  * @param {string} str String to be encoded.
 155                  */
 156                 wikiUrlencode: function ( str ) {
 157                         return util.rawurlencode( str )
 158                                 .replace( /%20/g, '_' ).replace( /%3A/g, ':' ).replace( /%2F/g, '/' );
 159                 },
 160
 161                 /**
 162                  * Get the link to a page name (relative to `wgServer`),
 163                  *
 164                  * @param {string} str Page name to get the link for.
 165                  * @return {string} Location for a page with name of `str` or boolean false on error.
 166                  */
 167                 wikiGetlink: function ( str ) {
 168                         return mw.config.get( 'wgArticlePath' ).replace( '$1',
 169                                 util.wikiUrlencode( typeof str === 'string' ? str : mw.config.get( 'wgPageName' ) ) );
 170                 },
 171
 172                 /**
 173                  * Get address to a script in the wiki root.
 174                  * For index.php use `mw.config.get( 'wgScript' )`.
 175                  *
 176                  * @since 1.18
 177                  * @param str string Name of script (eg. 'api'), defaults to 'index'
 178                  * @return string Address to script (eg. '/w/api.php' )
 179                  */
 180                 wikiScript: function ( str ) {
 181                         str = str || 'index';
 182                         if ( str === 'index' ) {
 183                                 return mw.config.get( 'wgScript' );
 184                         } else if ( str === 'load' ) {
 185                                 return mw.config.get( 'wgLoadScript' );
 186                         } else {
 187                                 return mw.config.get( 'wgScriptPath' ) + '/' + str +
 188                                         mw.config.get( 'wgScriptExtension' );
 189                         }
 190                 },
 191
 192                 /**
 193                  * Append a new style block to the head and return the CSSStyleSheet object.
 194                  * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
 195                  * This function returns the styleSheet object for convience (due to cross-browsers
 196                  * difference as to where it is located).
 197                  *
 198                  *     var sheet = mw.util.addCSS('.foobar { display: none; }');
 199                  *     $(foo).click(function () {
 200                  *         // Toggle the sheet on and off
 201                  *         sheet.disabled = !sheet.disabled;
 202                  *     });
 203                  *
 204                  * @param {string} text CSS to be appended
 205                  * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
 206                  */
 207                 addCSS: function ( text ) {
 208                         var s = mw.loader.addStyleTag( text );
 209                         return s.sheet || s;
 210                 },
 211
 212                 /**
 213                  * Hide/show the table of contents element
 214                  *
 215                  * @param {jQuery} $toggleLink A jQuery object of the toggle link.
 216                  * @param {Function} [callback] Function to be called after the toggle is
 217                  *  completed (including the animation).
 218                  * @return {Mixed} Boolean visibility of the toc (true if it's visible)
 219                  * or Null if there was no table of contents.
 220                  */
 221                 toggleToc: function ( $toggleLink, callback ) {
 222                         var $tocList = $( '#toc ul:first' );
 223
 224                         // This function shouldn't be called if there's no TOC,
 225                         // but just in case...
 226                         if ( $tocList.length ) {
 227                                 if ( $tocList.is( ':hidden' ) ) {
 228                                         $tocList.slideDown( 'fast', callback );
 229                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 230                                         $( '#toc' ).removeClass( 'tochidden' );
 231                                         $.cookie( 'mw_hidetoc', null, {
 232                                                 expires: 30,
 233                                                 path: '/'
 234                                         } );
 235                                         return true;
 236                                 } else {
 237                                         $tocList.slideUp( 'fast', callback );
 238                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 239                                         $( '#toc' ).addClass( 'tochidden' );
 240                                         $.cookie( 'mw_hidetoc', '1', {
 241                                                 expires: 30,
 242                                                 path: '/'
 243                                         } );
 244                                         return false;
 245                                 }
 246                         } else {
 247                                 return null;
 248                         }
 249                 },
 250
 251                 /**
 252                  * Grab the URL parameter value for the given parameter.
 253                  * Returns null if not found.
 254                  *
 255                  * @param {string} param The parameter name.
 256                  * @param {string} [url] URL to search through.
 257                  * @return {Mixed} Parameter value or null.
 258                  */
 259                 getParamValue: function ( param, url ) {
 260                         if ( url === undefined ) {
 261                                 url = document.location.href;
 262                         }
 263                         // Get last match, stop at hash
 264                         var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
 265                                 m = re.exec( url );
 266                         if ( m ) {
 267                                 // Beware that decodeURIComponent is not required to understand '+'
 268                                 // by spec, as encodeURIComponent does not produce it.
 269                                 return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
 270                         }
 271                         return null;
 272                 },
 273
 274                 /**
 275                  * @property {string}
 276                  * Access key prefix. Will be re-defined based on browser/operating system
 277                  * detection in mw.util#init.
 278                  */
 279                 tooltipAccessKeyPrefix: 'alt-',
 280
 281                 /**
 282                  * @property {RegExp}
 283                  * Regex to match accesskey tooltips.
 284                  *
 285                  * Should match:
 286                  *
 287                  * - "ctrl-option-"
 288                  * - "alt-shift-"
 289                  * - "ctrl-alt-"
 290                  * - "ctrl-"
 291                  *
 292                  * The accesskey is matched in group $6.
 293                  */
 294                 tooltipAccessKeyRegexp: /\[(ctrl-)?(option-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 295
 296                 /**
 297                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 298                  * If the nodeList parameter is given, only those nodes are updated;
 299                  * otherwise, all the nodes that will probably have accesskeys by
 300                  * default are updated.
 301                  *
 302                  * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
 303                  */
 304                 updateTooltipAccessKeys: function ( $nodes ) {
 305                         if ( !$nodes ) {
 306                                 // Rather than going into a loop of all anchor tags, limit to few elements that
 307                                 // contain the relevant anchor tags.
 308                                 // Input and label are rare enough that no such optimization is needed
 309                                 $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
 310                         } else if ( !( $nodes instanceof $ ) ) {
 311                                 $nodes = $( $nodes );
 312                         }
 313
 314                         $nodes.attr( 'title', function ( i, val ) {
 315                                 if ( val && util.tooltipAccessKeyRegexp.test( val ) ) {
 316                                         return val.replace( util.tooltipAccessKeyRegexp,
 317                                                 '[' + util.tooltipAccessKeyPrefix + '$6]' );
 318                                 }
 319                                 return val;
 320                         } );
 321                 },
 322
 323                 /*
 324                  * @property {jQuery}
 325                  * A jQuery object that refers to the content area element.
 326                  * Populated by #init.
 327                  */
 328                 $content: null,
 329
 330                 /**
 331                  * Add a link to a portlet menu on the page, such as:
 332                  *
 333                  * p-cactions (Content actions), p-personal (Personal tools),
 334                  * p-navigation (Navigation), p-tb (Toolbox)
 335                  *
 336                  * The first three paramters are required, the others are optional and
 337                  * may be null. Though providing an id and tooltip is recommended.
 338                  *
 339                  * By default the new link will be added to the end of the list. To
 340                  * add the link before a given existing item, pass the DOM node
 341                  * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
 342                  * (e.g. `'#foobar'`) for that item.
 343                  *
 344                  *     mw.util.addPortletLink(
 345                  *         'p-tb', 'http://mediawiki.org/',
 346                  *         'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 347                  *     );
 348                  *
 349                  * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 350                  * @param {string} href Link URL
 351                  * @param {string} text Link text
 352                  * @param {string} [id] ID of the new item, should be unique and preferably have
 353                  *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 354                  * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
 355                  * @param {string} [accesskey] Access key to activate this link (one character, try
 356                  *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
 357                  *  see if 'x' is already used.
 358                  * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
 359                  *  the new item should be added before, should be another item in the same
 360                  *  list, it will be ignored otherwise
 361                  *
 362                  * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
 363                  * depending on the skin) or null if no element was added to the document.
 364                  */
 365                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 366                         var $item, $link, $portlet, $ul;
 367
 368                         // Check if there's atleast 3 arguments to prevent a TypeError
 369                         if ( arguments.length < 3 ) {
 370                                 return null;
 371                         }
 372                         // Setup the anchor tag
 373                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 374                         if ( tooltip ) {
 375                                 $link.attr( 'title', tooltip );
 376                         }
 377
 378                         // Select the specified portlet
 379                         $portlet = $( '#' + portlet );
 380                         if ( $portlet.length === 0 ) {
 381                                 return null;
 382                         }
 383                         // Select the first (most likely only) unordered list inside the portlet
 384                         $ul = $portlet.find( 'ul' ).eq( 0 );
 385
 386                         // If it didn't have an unordered list yet, create it
 387                         if ( $ul.length === 0 ) {
 388
 389                                 $ul = $( '<ul>' );
 390
 391                                 // If there's no <div> inside, append it to the portlet directly
 392                                 if ( $portlet.find( 'div:first' ).length === 0 ) {
 393                                         $portlet.append( $ul );
 394                                 } else {
 395                                         // otherwise if there's a div (such as div.body or div.pBody)
 396                                         // append the <ul> to last (most likely only) div
 397                                         $portlet.find( 'div' ).eq( -1 ).append( $ul );
 398                                 }
 399                         }
 400                         // Just in case..
 401                         if ( $ul.length === 0 ) {
 402                                 return null;
 403                         }
 404
 405                         // Unhide portlet if it was hidden before
 406                         $portlet.removeClass( 'emptyPortlet' );
 407
 408                         // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 409                         // and back up the selector to the list item
 410                         if ( $portlet.hasClass( 'vectorTabs' ) ) {
 411                                 $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 412                         } else {
 413                                 $item = $link.wrap( '<li></li>' ).parent();
 414                         }
 415
 416                         // Implement the properties passed to the function
 417                         if ( id ) {
 418                                 $item.attr( 'id', id );
 419                         }
 420
 421                         if ( tooltip ) {
 422                                 // Trim any existing accesskey hint and the trailing space
 423                                 tooltip = $.trim( tooltip.replace( util.tooltipAccessKeyRegexp, '' ) );
 424                                 if ( accesskey ) {
 425                                         tooltip += ' [' + accesskey + ']';
 426                                 }
 427                                 $link.attr( 'title', tooltip );
 428                                 if ( accesskey ) {
 429                                         util.updateTooltipAccessKeys( $link );
 430                                 }
 431                         }
 432
 433                         if ( accesskey ) {
 434                                 $link.attr( 'accesskey', accesskey );
 435                         }
 436
 437                         // Where to put our node ?
 438                         // - nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 439                         if ( nextnode && nextnode.parentNode === $ul[0] ) {
 440                                 $( nextnode ).before( $item );
 441
 442                         // - nextnode is a CSS selector for jQuery
 443                         } else if ( typeof nextnode === 'string' && $ul.find( nextnode ).length !== 0 ) {
 444                                 $ul.find( nextnode ).eq( 0 ).before( $item );
 445
 446                         // If the jQuery selector isn't found within the <ul>,
 447                         // or if nextnode was invalid or not passed at all,
 448                         // then just append it at the end of the <ul> (this is the default behavior)
 449                         } else {
 450                                 $ul.append( $item );
 451                         }
 452
 453                         return $item[0];
 454                 },
 455
 456                 /**
 457                  * Add a little box at the top of the screen to inform the user of
 458                  * something, replacing any previous message.
 459                  * Calling with no arguments, with an empty string or null will hide the message
 460                  *
 461                  * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
 462                  * to allow CSS/JS to hide different boxes. null = no class used.
 463                  * @deprecated Use mw#notify
 464                  */
 465                 jsMessage: function ( message ) {
 466                         if ( !arguments.length || message === '' || message === null ) {
 467                                 return true;
 468                         }
 469                         if ( typeof message !== 'object' ) {
 470                                 message = $.parseHTML( message );
 471                         }
 472                         mw.notify( message, { autoHide: true, tag: 'legacy' } );
 473                         return true;
 474                 },
 475
 476                 /**
 477                  * Validate a string as representing a valid e-mail address
 478                  * according to HTML5 specification. Please note the specification
 479                  * does not validate a domain with one character.
 480                  *
 481                  * FIXME: should be moved to or replaced by a validation module.
 482                  *
 483                  * @param {string} mailtxt E-mail address to be validated.
 484                  * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
 485                  * as determined by validation.
 486                  */
 487                 validateEmail: function ( mailtxt ) {
 488                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 489
 490                         if ( mailtxt === '' ) {
 491                                 return null;
 492                         }
 493
 494                         // HTML5 defines a string as valid e-mail address if it matches
 495                         // the ABNF:
 496                         //      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 497                         // With:
 498                         // - atext      : defined in RFC 5322 section 3.2.3
 499                         // - ldh-str : defined in RFC 1034 section 3.5
 500                         //
 501                         // (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68)
 502                         // First, define the RFC 5322 'atext' which is pretty easy:
 503                         // atext = ALPHA / DIGIT / ; Printable US-ASCII
 504                         //     "!" / "#" /    ; characters not including
 505                         //     "$" / "%" /    ; specials. Used for atoms.
 506                         //     "&" / "'" /
 507                         //     "*" / "+" /
 508                         //     "-" / "/" /
 509                         //     "=" / "?" /
 510                         //     "^" / "_" /
 511                         //     "`" / "{" /
 512                         //     "|" / "}" /
 513                         //     "~"
 514                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 515
 516                         // Next define the RFC 1034 'ldh-str'
 517                         //      <domain> ::= <subdomain> | " "
 518                         //      <subdomain> ::= <label> | <subdomain> "." <label>
 519                         //      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 520                         //      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 521                         //      <let-dig-hyp> ::= <let-dig> | "-"
 522                         //      <let-dig> ::= <letter> | <digit>
 523                         rfc1034LdhStr = 'a-z0-9\\-';
 524
 525                         html5EmailRegexp = new RegExp(
 526                                 // start of string
 527                                 '^'
 528                                 +
 529                                 // User part which is liberal :p
 530                                 '[' + rfc5322Atext + '\\.]+'
 531                                 +
 532                                 // 'at'
 533                                 '@'
 534                                 +
 535                                 // Domain first part
 536                                 '[' + rfc1034LdhStr + ']+'
 537                                 +
 538                                 // Optional second part and following are separated by a dot
 539                                 '(?:\\.[' + rfc1034LdhStr + ']+)*'
 540                                 +
 541                                 // End of string
 542                                 '$',
 543                                 // RegExp is case insensitive
 544                                 'i'
 545                         );
 546                         return (null !== mailtxt.match( html5EmailRegexp ) );
 547                 },
 548
 549                 /**
 550                  * Note: borrows from IP::isIPv4
 551                  *
 552                  * @param {string} address
 553                  * @param {boolean} allowBlock
 554                  * @return {boolean}
 555                  */
 556                 isIPv4Address: function ( address, allowBlock ) {
 557                         if ( typeof address !== 'string' ) {
 558                                 return false;
 559                         }
 560
 561                         var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
 562                                 RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
 563                                 RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 564
 565                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
 566                 },
 567
 568                 /**
 569                  * Note: borrows from IP::isIPv6
 570                  *
 571                  * @param {string} address
 572                  * @param {boolean} allowBlock
 573                  * @return {boolean}
 574                  */
 575                 isIPv6Address: function ( address, allowBlock ) {
 576                         if ( typeof address !== 'string' ) {
 577                                 return false;
 578                         }
 579
 580                         var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
 581                                 RE_IPV6_ADD =
 582                         '(?:' + // starts with "::" (including "::")
 583                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 584                         '|' + // ends with "::" (except "::")
 585                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 586                         '|' + // contains no "::"
 587                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 588                         ')';
 589
 590                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
 591                                 return true;
 592                         }
 593
 594                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 595                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 596
 597                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
 598                                 && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
 599                 }
 600         };
 601
 602         mw.util = util;
 603
 604 }( mediaWiki, jQuery ) );