resources/mediawiki/mediawiki.util.js

   1 /**
   2  * Implements mediaWiki.util library
   3  */
   4 ( function ( mw, $ ) {
   5         'use strict';
   6
   7         // Local cache and alias
   8         var util = {
   9
  10                 /**
  11                  * Initialisation
  12                  * (don't call before document ready)
  13                  */
  14                 init: function () {
  15                         var profile, $tocTitle, $tocToggleLink, hideTocCookie;
  16
  17                         /* Set tooltipAccessKeyPrefix */
  18                         profile = $.client.profile();
  19
  20                         // Opera on any platform
  21                         if ( profile.name === 'opera' ) {
  22                                 util.tooltipAccessKeyPrefix = 'shift-esc-';
  23
  24                         // Chrome on any platform
  25                         } else if ( profile.name === 'chrome' ) {
  26
  27                                 util.tooltipAccessKeyPrefix = (
  28                                         profile.platform === 'mac'
  29                                                 // Chrome on Mac
  30                                                 ? 'ctrl-option-'
  31                                                 // Chrome on Windows or Linux
  32                                                 // (both alt- and alt-shift work, but alt with E, D, F etc does not
  33                                                 // work since they are browser shortcuts)
  34                                                 : 'alt-shift-'
  35                                 );
  36
  37                         // Non-Windows Safari with webkit_version > 526
  38                         } else if ( profile.platform !== 'win'
  39                                 && profile.name === 'safari'
  40                                 && profile.layoutVersion > 526 ) {
  41                                 util.tooltipAccessKeyPrefix = 'ctrl-alt-';
  42                         // Firefox 14+ on Mac
  43                         } else if ( profile.platform === 'mac'
  44                                 && profile.name === 'firefox'
  45                                 && profile.versionNumber >= 14 ) {
  46                                 util.tooltipAccessKeyPrefix = 'ctrl-option-';
  47                         // Safari/Konqueror on any platform, or any browser on Mac
  48                         // (but not Safari on Windows)
  49                         } else if ( !( profile.platform === 'win' && profile.name === 'safari' )
  50                                                         && ( profile.name === 'safari'
  51                                                         || profile.platform === 'mac'
  52                                                         || profile.name === 'konqueror' ) ) {
  53                                 util.tooltipAccessKeyPrefix = 'ctrl-';
  54
  55                         // Firefox 2.x and later
  56                         } else if ( profile.name === 'firefox' && profile.versionBase > '1' ) {
  57                                 util.tooltipAccessKeyPrefix = 'alt-shift-';
  58                         }
  59
  60                         /* Fill $content var */
  61                         util.$content = ( function () {
  62                                 var i, l, $content, selectors;
  63                                 selectors = [
  64                                         // The preferred standard for setting $content (class="mw-body")
  65                                         // You may also use (class="mw-body mw-body-primary") if you use
  66                                         // mw-body in multiple locations.
  67                                         // Or class="mw-body-primary" if you want $content to be deeper
  68                                         // in the dom than mw-body
  69                                         '.mw-body-primary',
  70                                         '.mw-body',
  71
  72                                         /* Legacy fallbacks for setting the content */
  73                                         // Vector, Monobook, Chick, etc... based skins
  74                                         '#bodyContent',
  75
  76                                         // Modern based skins
  77                                         '#mw_contentholder',
  78
  79                                         // Standard, CologneBlue
  80                                         '#article',
  81
  82                                         // #content is present on almost all if not all skins. Most skins (the above cases)
  83                                         // have #content too, but as an outer wrapper instead of the article text container.
  84                                         // The skins that don't have an outer wrapper do have #content for everything
  85                                         // so it's a good fallback
  86                                         '#content',
  87
  88                                         // If nothing better is found fall back to our bodytext div that is guaranteed to be here
  89                                         '#mw-content-text',
  90
  91                                         // Should never happen... well, it could if someone is not finished writing a skin and has
  92                                         // not inserted bodytext yet. But in any case <body> should always exist
  93                                         'body'
  94                                 ];
  95                                 for ( i = 0, l = selectors.length; i < l; i++ ) {
  96                                         $content = $( selectors[i] ).first();
  97                                         if ( $content.length ) {
  98                                                 return $content;
  99                                         }
 100                                 }
 101
 102                                 // Make sure we don't unset util.$content if it was preset and we don't find anything
 103                                 return util.$content;
 104                         } )();
 105
 106                         // Table of contents toggle
 107                         $tocTitle = $( '#toctitle' );
 108                         $tocToggleLink = $( '#togglelink' );
 109                         // Only add it if there is a TOC and there is no toggle added already
 110                         if ( $( '#toc' ).length && $tocTitle.length && !$tocToggleLink.length ) {
 111                                 hideTocCookie = $.cookie( 'mw_hidetoc' );
 112                                         $tocToggleLink = $( '<a href="#" class="internal" id="togglelink"></a>' )
 113                                                 .text( mw.msg( 'hidetoc' ) )
 114                                                 .click( function ( e ) {
 115                                                         e.preventDefault();
 116                                                         util.toggleToc( $(this) );
 117                                                 } );
 118                                 $tocTitle.append(
 119                                         $tocToggleLink
 120                                                 .wrap( '<span class="toctoggle"></span>' )
 121                                                 .parent()
 122                                                         .prepend( '&nbsp;[' )
 123                                                         .append( ']&nbsp;' )
 124                                 );
 125
 126                                 if ( hideTocCookie === '1' ) {
 127                                         util.toggleToc( $tocToggleLink );
 128                                 }
 129                         }
 130                 },
 131
 132                 /* Main body */
 133
 134                 /**
 135                  * Encode the string like PHP's rawurlencode
 136                  *
 137                  * @param str string String to be encoded
 138                  */
 139                 rawurlencode: function ( str ) {
 140                         str = String( str );
 141                         return encodeURIComponent( str )
 142                                 .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
 143                                 .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
 144                 },
 145
 146                 /**
 147                  * Encode page titles for use in a URL
 148                  * We want / and : to be included as literal characters in our title URLs
 149                  * as they otherwise fatally break the title
 150                  *
 151                  * @param str string String to be encoded
 152                  */
 153                 wikiUrlencode: function ( str ) {
 154                         return util.rawurlencode( str )
 155                                 .replace( /%20/g, '_' ).replace( /%3A/g, ':' ).replace( /%2F/g, '/' );
 156                 },
 157
 158                 /**
 159                  * Get the link to a page name (relative to wgServer)
 160                  *
 161                  * @param str String: Page name to get the link for.
 162                  * @return String: Location for a page with name of 'str' or boolean false on error.
 163                  */
 164                 wikiGetlink: function ( str ) {
 165                         return mw.config.get( 'wgArticlePath' ).replace( '$1',
 166                                 util.wikiUrlencode( typeof str === 'string' ? str : mw.config.get( 'wgPageName' ) ) );
 167                 },
 168
 169                 /**
 170                  * Get address to a script in the wiki root.
 171                  * For index.php use mw.config.get( 'wgScript' )
 172                  *
 173                  * @since 1.18
 174                  * @param str string Name of script (eg. 'api'), defaults to 'index'
 175                  * @return string Address to script (eg. '/w/api.php' )
 176                  */
 177                 wikiScript: function ( str ) {
 178                         str = str || 'index';
 179                         if ( str === 'index' ) {
 180                                 return mw.config.get( 'wgScript' );
 181                         } else if ( str === 'load' ) {
 182                                 return mw.config.get( 'wgLoadScript' );
 183                         } else {
 184                                 return mw.config.get( 'wgScriptPath' ) + '/' + str +
 185                                         mw.config.get( 'wgScriptExtension' );
 186                         }
 187                 },
 188
 189                 /**
 190                  * Append a new style block to the head and return the CSSStyleSheet object.
 191                  * Use .ownerNode to access the <style> element, or use mw.loader.addStyleTag.
 192                  * This function returns the styleSheet object for convience (due to cross-browsers
 193                  * difference as to where it is located).
 194                  * @example
 195                  * <code>
 196                  * var sheet = mw.util.addCSS('.foobar { display: none; }');
 197                  * $(foo).click(function () {
 198                  *     // Toggle the sheet on and off
 199                  *     sheet.disabled = !sheet.disabled;
 200                  * });
 201                  * </code>
 202                  *
 203                  * @param text string CSS to be appended
 204                  * @return CSSStyleSheet (use .ownerNode to get to the <style> element)
 205                  */
 206                 addCSS: function ( text ) {
 207                         var s = mw.loader.addStyleTag( text );
 208                         return s.sheet || s;
 209                 },
 210
 211                 /**
 212                  * Hide/show the table of contents element
 213                  *
 214                  * @param $toggleLink jQuery A jQuery object of the toggle link.
 215                  * @param callback function Function to be called after the toggle is
 216                  * completed (including the animation) (optional)
 217                  * @return mixed Boolean visibility of the toc (true if it's visible)
 218                  * or Null if there was no table of contents.
 219                  */
 220                 toggleToc: function ( $toggleLink, callback ) {
 221                         var $tocList = $( '#toc ul:first' );
 222
 223                         // This function shouldn't be called if there's no TOC,
 224                         // but just in case...
 225                         if ( $tocList.length ) {
 226                                 if ( $tocList.is( ':hidden' ) ) {
 227                                         $tocList.slideDown( 'fast', callback );
 228                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 229                                         $( '#toc' ).removeClass( 'tochidden' );
 230                                         $.cookie( 'mw_hidetoc', null, {
 231                                                 expires: 30,
 232                                                 path: '/'
 233                                         } );
 234                                         return true;
 235                                 } else {
 236                                         $tocList.slideUp( 'fast', callback );
 237                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 238                                         $( '#toc' ).addClass( 'tochidden' );
 239                                         $.cookie( 'mw_hidetoc', '1', {
 240                                                 expires: 30,
 241                                                 path: '/'
 242                                         } );
 243                                         return false;
 244                                 }
 245                         } else {
 246                                 return null;
 247                         }
 248                 },
 249
 250                 /**
 251                  * Grab the URL parameter value for the given parameter.
 252                  * Returns null if not found.
 253                  *
 254                  * @param param string The parameter name.
 255                  * @param url string URL to search through (optional)
 256                  * @return mixed Parameter value or null.
 257                  */
 258                 getParamValue: function ( param, url ) {
 259                         if ( url === undefined ) {
 260                                 url = document.location.href;
 261                         }
 262                         // Get last match, stop at hash
 263                         var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
 264                                 m = re.exec( url );
 265                         if ( m ) {
 266                                 // Beware that decodeURIComponent is not required to understand '+'
 267                                 // by spec, as encodeURIComponent does not produce it.
 268                                 return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
 269                         }
 270                         return null;
 271                 },
 272
 273                 /**
 274                  * @var string
 275                  * Access key prefix. Will be re-defined based on browser/operating system
 276                  * detection in mw.util.init().
 277                  */
 278                 tooltipAccessKeyPrefix: 'alt-',
 279
 280                 /**
 281                  * @var RegExp
 282                  * Regex to match accesskey tooltips.
 283                  */
 284                 tooltipAccessKeyRegexp: /\[(ctrl-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 285
 286                 /**
 287                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 288                  * If the nodeList parameter is given, only those nodes are updated;
 289                  * otherwise, all the nodes that will probably have accesskeys by
 290                  * default are updated.
 291                  *
 292                  * @param $nodes {Array|jQuery} [optional] A jQuery object, or array
 293                  * of elements to update.
 294                  */
 295                 updateTooltipAccessKeys: function ( $nodes ) {
 296                         if ( !$nodes ) {
 297                                 // Rather than going into a loop of all anchor tags, limit to few elements that
 298                                 // contain the relevant anchor tags.
 299                                 // Input and label are rare enough that no such optimization is needed
 300                                 $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
 301                         } else if ( !( $nodes instanceof $ ) ) {
 302                                 $nodes = $( $nodes );
 303                         }
 304
 305                         $nodes.attr( 'title', function ( i, val ) {
 306                                 if ( val && util.tooltipAccessKeyRegexp.exec( val ) ) {
 307                                         return val.replace( util.tooltipAccessKeyRegexp,
 308                                                 '[' + util.tooltipAccessKeyPrefix + '$5]' );
 309                                 }
 310                                 return val;
 311                         } );
 312                 },
 313
 314                 /*
 315                  * @var jQuery
 316                  * A jQuery object that refers to the content area element
 317                  * Populated by init().
 318                  */
 319                 $content: null,
 320
 321                 /**
 322                  * Add a link to a portlet menu on the page, such as:
 323                  *
 324                  * p-cactions (Content actions), p-personal (Personal tools),
 325                  * p-navigation (Navigation), p-tb (Toolbox)
 326                  *
 327                  * The first three paramters are required, the others are optional and
 328                  * may be null. Though providing an id and tooltip is recommended.
 329                  *
 330                  * By default the new link will be added to the end of the list. To
 331                  * add the link before a given existing item, pass the DOM node
 332                  * (document.getElementById( 'foobar' )) or the jQuery-selector
 333                  * ( '#foobar' ) of that item.
 334                  *
 335                  * @example mw.util.addPortletLink(
 336                  *       'p-tb', 'http://mediawiki.org/',
 337                  *       'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 338                  * )
 339                  *
 340                  * @param portlet string ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 341                  * @param href string Link URL
 342                  * @param text string Link text
 343                  * @param id string ID of the new item, should be unique and preferably have
 344                  * the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 345                  * @param tooltip string Text to show when hovering over the link, without accesskey suffix
 346                  * @param accesskey string Access key to activate this link (one character, try
 347                  * to avoid conflicts. Use $( '[accesskey=x]' ).get() in the console to
 348                  * see if 'x' is already used.
 349                  * @param nextnode mixed DOM Node or jQuery-selector string of the item that the new
 350                  * item should be added before, should be another item in the same
 351                  * list, it will be ignored otherwise
 352                  *
 353                  * @return mixed The DOM Node of the added item (a ListItem or Anchor element,
 354                  * depending on the skin) or null if no element was added to the document.
 355                  */
 356                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 357                         var $item, $link, $portlet, $ul;
 358
 359                         // Check if there's atleast 3 arguments to prevent a TypeError
 360                         if ( arguments.length < 3 ) {
 361                                 return null;
 362                         }
 363                         // Setup the anchor tag
 364                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 365                         if ( tooltip ) {
 366                                 $link.attr( 'title', tooltip );
 367                         }
 368
 369                         // Some skins don't have any portlets
 370                         // just add it to the bottom of their 'sidebar' element as a fallback
 371                         switch ( mw.config.get( 'skin' ) ) {
 372                         case 'standard':
 373                                 $( '#quickbar' ).append( $link.after( '<br/>' ) );
 374                                 return $link[0];
 375                         case 'nostalgia':
 376                                 $( '#searchform' ).before( $link ).before( ' &#124; ' );
 377                                 return $link[0];
 378                         default: // Skins like chick, modern, monobook, myskin, simple, vector...
 379
 380                                 // Select the specified portlet
 381                                 $portlet = $( '#' + portlet );
 382                                 if ( $portlet.length === 0 ) {
 383                                         return null;
 384                                 }
 385                                 // Select the first (most likely only) unordered list inside the portlet
 386                                 $ul = $portlet.find( 'ul' ).eq( 0 );
 387
 388                                 // If it didn't have an unordered list yet, create it
 389                                 if ( $ul.length === 0 ) {
 390
 391                                         $ul = $( '<ul>' );
 392
 393                                         // If there's no <div> inside, append it to the portlet directly
 394                                         if ( $portlet.find( 'div:first' ).length === 0 ) {
 395                                                 $portlet.append( $ul );
 396                                         } else {
 397                                                 // otherwise if there's a div (such as div.body or div.pBody)
 398                                                 // append the <ul> to last (most likely only) div
 399                                                 $portlet.find( 'div' ).eq( -1 ).append( $ul );
 400                                         }
 401                                 }
 402                                 // Just in case..
 403                                 if ( $ul.length === 0 ) {
 404                                         return null;
 405                                 }
 406
 407                                 // Unhide portlet if it was hidden before
 408                                 $portlet.removeClass( 'emptyPortlet' );
 409
 410                                 // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 411                                 // and back up the selector to the list item
 412                                 if ( $portlet.hasClass( 'vectorTabs' ) ) {
 413                                         $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 414                                 } else {
 415                                         $item = $link.wrap( '<li></li>' ).parent();
 416                                 }
 417
 418                                 // Implement the properties passed to the function
 419                                 if ( id ) {
 420                                         $item.attr( 'id', id );
 421                                 }
 422                                 if ( accesskey ) {
 423                                         $link.attr( 'accesskey', accesskey );
 424                                         tooltip += ' [' + accesskey + ']';
 425                                         $link.attr( 'title', tooltip );
 426                                 }
 427                                 if ( accesskey && tooltip ) {
 428                                         util.updateTooltipAccessKeys( $link );
 429                                 }
 430
 431                                 // Where to put our node ?
 432                                 // - nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 433                                 if ( nextnode && nextnode.parentNode === $ul[0] ) {
 434                                         $(nextnode).before( $item );
 435
 436                                 // - nextnode is a CSS selector for jQuery
 437                                 } else if ( typeof nextnode === 'string' && $ul.find( nextnode ).length !== 0 ) {
 438                                         $ul.find( nextnode ).eq( 0 ).before( $item );
 439
 440                                 // If the jQuery selector isn't found within the <ul>,
 441                                 // or if nextnode was invalid or not passed at all,
 442                                 // then just append it at the end of the <ul> (this is the default behaviour)
 443                                 } else {
 444                                         $ul.append( $item );
 445                                 }
 446
 447
 448                                 return $item[0];
 449                         }
 450                 },
 451
 452                 /**
 453                  * Add a little box at the top of the screen to inform the user of
 454                  * something, replacing any previous message.
 455                  * Calling with no arguments, with an empty string or null will hide the message
 456                  *
 457                  * @param message {mixed} The DOM-element, jQuery object or HTML-string to be put inside the message box.
 458                  * to allow CSS/JS to hide different boxes. null = no class used.
 459                  * @depreceated Use mw.notify
 460                  */
 461                 jsMessage: function ( message ) {
 462                         if ( !arguments.length || message === '' || message === null ) {
 463                                 return true;
 464                         }
 465                         if ( typeof message !== 'object' ) {
 466                                 message = $.parseHTML( message );
 467                         }
 468                         mw.notify( message, { autoHide: true, tag: 'legacy' } );
 469                         return true;
 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                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 485
 486                         if ( mailtxt === '' ) {
 487                                 return null;
 488                         }
 489
 490                         /**
 491                          * HTML5 defines a string as valid e-mail address if it matches
 492                          * the ABNF:
 493                          *      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 494                          * With:
 495                          * - atext      : defined in RFC 5322 section 3.2.3
 496                          * - ldh-str : defined in RFC 1034 section 3.5
 497                          *
 498                          * (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68):
 499                          */
 500
 501                         /**
 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                         */
 515                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 516
 517                         /**
 518                          * Next define the RFC 1034 'ldh-str'
 519                          *      <domain> ::= <subdomain> | " "
 520                          *      <subdomain> ::= <label> | <subdomain> "." <label>
 521                          *      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 522                          *      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 523                          *      <let-dig-hyp> ::= <let-dig> | "-"
 524                          *      <let-dig> ::= <letter> | <digit>
 525                          */
 526                         rfc1034LdhStr = 'a-z0-9\\-';
 527
 528                         html5EmailRegexp = new RegExp(
 529                                 // start of string
 530                                 '^'
 531                                 +
 532                                 // User part which is liberal :p
 533                                 '[' + rfc5322Atext + '\\.]+'
 534                                 +
 535                                 // 'at'
 536                                 '@'
 537                                 +
 538                                 // Domain first part
 539                                 '[' + rfc1034LdhStr + ']+'
 540                                 +
 541                                 // Optional second part and following are separated by a dot
 542                                 '(?:\\.[' + rfc1034LdhStr + ']+)*'
 543                                 +
 544                                 // End of string
 545                                 '$',
 546                                 // RegExp is case insensitive
 547                                 'i'
 548                         );
 549                         return (null !== mailtxt.match( html5EmailRegexp ) );
 550                 },
 551
 552                 /**
 553                  * Note: borrows from IP::isIPv4
 554                  *
 555                  * @param address string
 556                  * @param allowBlock boolean
 557                  * @return boolean
 558                  */
 559                 isIPv4Address: function ( address, allowBlock ) {
 560                         if ( typeof address !== 'string' ) {
 561                                 return false;
 562                         }
 563
 564                         var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
 565                                 RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
 566                                 RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 567
 568                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
 569                 },
 570
 571                 /**
 572                  * Note: borrows from IP::isIPv6
 573                  *
 574                  * @param address string
 575                  * @param allowBlock boolean
 576                  * @return boolean
 577                  */
 578                 isIPv6Address: function ( address, allowBlock ) {
 579                         if ( typeof address !== 'string' ) {
 580                                 return false;
 581                         }
 582
 583                         var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
 584                                 RE_IPV6_ADD =
 585                         '(?:' + // starts with "::" (including "::")
 586                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 587                         '|' + // ends with "::" (except "::")
 588                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 589                         '|' + // contains no "::"
 590                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 591                         ')';
 592
 593                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
 594                                 return true;
 595                         }
 596
 597                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 598                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 599
 600                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
 601                                 && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
 602                 }
 603         };
 604
 605         mw.util = util;
 606
 607 }( mediaWiki, jQuery ) );