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                         // Table of contents toggle
 108                         $tocTitle = $( '#toctitle' );
 109                         $tocToggleLink = $( '#togglelink' );
 110                         // Only add it if there is a TOC and there is no toggle added already
 111                         if ( $( '#toc' ).length && $tocTitle.length && !$tocToggleLink.length ) {
 112                                 hideTocCookie = $.cookie( 'mw_hidetoc' );
 113                                         $tocToggleLink = $( '<a href="#" class="internal" id="togglelink"></a>' )
 114                                                 .text( mw.msg( 'hidetoc' ) )
 115                                                 .click( function ( e ) {
 116                                                         e.preventDefault();
 117                                                         util.toggleToc( $(this) );
 118                                                 } );
 119                                 $tocTitle.append(
 120                                         $tocToggleLink
 121                                                 .wrap( '<span class="toctoggle"></span>' )
 122                                                 .parent()
 123                                                         .prepend( '&nbsp;[' )
 124                                                         .append( ']&nbsp;' )
 125                                 );
 126
 127                                 if ( hideTocCookie === '1' ) {
 128                                         util.toggleToc( $tocToggleLink );
 129                                 }
 130                         }
 131                 },
 132
 133                 /* Main body */
 134
 135                 /**
 136                  * Encode the string like PHP's rawurlencode
 137                  *
 138                  * @param {string} str String to be encoded.
 139                  */
 140                 rawurlencode: function ( str ) {
 141                         str = String( str );
 142                         return encodeURIComponent( str )
 143                                 .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
 144                                 .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
 145                 },
 146
 147                 /**
 148                  * Encode page titles for use in a URL
 149                  * We want / and : to be included as literal characters in our title URLs
 150                  * as they otherwise fatally break the title
 151                  *
 152                  * @param {string} str String to be encoded.
 153                  */
 154                 wikiUrlencode: function ( str ) {
 155                         return util.rawurlencode( str )
 156                                 .replace( /%20/g, '_' ).replace( /%3A/g, ':' ).replace( /%2F/g, '/' );
 157                 },
 158
 159                 /**
 160                  * Get the link to a page name (relative to `wgServer`),
 161                  *
 162                  * @param {string} str Page name to get the link for.
 163                  * @return {string} Location for a page with name of `str` or boolean false on error.
 164                  */
 165                 wikiGetlink: function ( str ) {
 166                         return mw.config.get( 'wgArticlePath' ).replace( '$1',
 167                                 util.wikiUrlencode( typeof str === 'string' ? str : mw.config.get( 'wgPageName' ) ) );
 168                 },
 169
 170                 /**
 171                  * Get address to a script in the wiki root.
 172                  * For index.php use `mw.config.get( 'wgScript' )`.
 173                  *
 174                  * @since 1.18
 175                  * @param str string Name of script (eg. 'api'), defaults to 'index'
 176                  * @return string Address to script (eg. '/w/api.php' )
 177                  */
 178                 wikiScript: function ( str ) {
 179                         str = str || 'index';
 180                         if ( str === 'index' ) {
 181                                 return mw.config.get( 'wgScript' );
 182                         } else if ( str === 'load' ) {
 183                                 return mw.config.get( 'wgLoadScript' );
 184                         } else {
 185                                 return mw.config.get( 'wgScriptPath' ) + '/' + str +
 186                                         mw.config.get( 'wgScriptExtension' );
 187                         }
 188                 },
 189
 190                 /**
 191                  * Append a new style block to the head and return the CSSStyleSheet object.
 192                  * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
 193                  * This function returns the styleSheet object for convience (due to cross-browsers
 194                  * difference as to where it is located).
 195                  *
 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                  *
 202                  * @param {string} text CSS to be appended
 203                  * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
 204                  */
 205                 addCSS: function ( text ) {
 206                         var s = mw.loader.addStyleTag( text );
 207                         return s.sheet || s;
 208                 },
 209
 210                 /**
 211                  * Hide/show the table of contents element
 212                  *
 213                  * @param {jQuery} $toggleLink A jQuery object of the toggle link.
 214                  * @param {Function} [callback] Function to be called after the toggle is
 215                  *  completed (including the animation).
 216                  * @return {Mixed} Boolean visibility of the toc (true if it's visible)
 217                  * or Null if there was no table of contents.
 218                  */
 219                 toggleToc: function ( $toggleLink, callback ) {
 220                         var $tocList = $( '#toc ul:first' );
 221
 222                         // This function shouldn't be called if there's no TOC,
 223                         // but just in case...
 224                         if ( $tocList.length ) {
 225                                 if ( $tocList.is( ':hidden' ) ) {
 226                                         $tocList.slideDown( 'fast', callback );
 227                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 228                                         $( '#toc' ).removeClass( 'tochidden' );
 229                                         $.cookie( 'mw_hidetoc', null, {
 230                                                 expires: 30,
 231                                                 path: '/'
 232                                         } );
 233                                         return true;
 234                                 } else {
 235                                         $tocList.slideUp( 'fast', callback );
 236                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 237                                         $( '#toc' ).addClass( 'tochidden' );
 238                                         $.cookie( 'mw_hidetoc', '1', {
 239                                                 expires: 30,
 240                                                 path: '/'
 241                                         } );
 242                                         return false;
 243                                 }
 244                         } else {
 245                                 return null;
 246                         }
 247                 },
 248
 249                 /**
 250                  * Grab the URL parameter value for the given parameter.
 251                  * Returns null if not found.
 252                  *
 253                  * @param {string} param The parameter name.
 254                  * @param {string} [url=document.location.href] URL to search through, defaulting to the current document's URL.
 255                  * @return {Mixed} Parameter value or null.
 256                  */
 257                 getParamValue: function ( param, url ) {
 258                         if ( url === undefined ) {
 259                                 url = document.location.href;
 260                         }
 261                         // Get last match, stop at hash
 262                         var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
 263                                 m = re.exec( url );
 264                         if ( m ) {
 265                                 // Beware that decodeURIComponent is not required to understand '+'
 266                                 // by spec, as encodeURIComponent does not produce it.
 267                                 return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
 268                         }
 269                         return null;
 270                 },
 271
 272                 /**
 273                  * @property {string}
 274                  * Access key prefix. Will be re-defined based on browser/operating system
 275                  * detection in mw.util#init.
 276                  */
 277                 tooltipAccessKeyPrefix: 'alt-',
 278
 279                 /**
 280                  * @property {RegExp}
 281                  * Regex to match accesskey tooltips.
 282                  *
 283                  * Should match:
 284                  *
 285                  * - "ctrl-option-"
 286                  * - "alt-shift-"
 287                  * - "ctrl-alt-"
 288                  * - "ctrl-"
 289                  *
 290                  * The accesskey is matched in group $6.
 291                  */
 292                 tooltipAccessKeyRegexp: /\[(ctrl-)?(option-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 293
 294                 /**
 295                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 296                  * If the nodeList parameter is given, only those nodes are updated;
 297                  * otherwise, all the nodes that will probably have accesskeys by
 298                  * default are updated.
 299                  *
 300                  * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
 301                  */
 302                 updateTooltipAccessKeys: function ( $nodes ) {
 303                         if ( !$nodes ) {
 304                                 // Rather than going into a loop of all anchor tags, limit to few elements that
 305                                 // contain the relevant anchor tags.
 306                                 // Input and label are rare enough that no such optimization is needed
 307                                 $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
 308                         } else if ( !( $nodes instanceof $ ) ) {
 309                                 $nodes = $( $nodes );
 310                         }
 311
 312                         $nodes.attr( 'title', function ( i, val ) {
 313                                 if ( val && util.tooltipAccessKeyRegexp.test( val ) ) {
 314                                         return val.replace( util.tooltipAccessKeyRegexp,
 315                                                 '[' + util.tooltipAccessKeyPrefix + '$6]' );
 316                                 }
 317                                 return val;
 318                         } );
 319                 },
 320
 321                 /*
 322                  * @property {jQuery}
 323                  * A jQuery object that refers to the content area element.
 324                  * Populated by #init.
 325                  */
 326                 $content: null,
 327
 328                 /**
 329                  * Add a link to a portlet menu on the page, such as:
 330                  *
 331                  * p-cactions (Content actions), p-personal (Personal tools),
 332                  * p-navigation (Navigation), p-tb (Toolbox)
 333                  *
 334                  * The first three paramters are required, the others are optional and
 335                  * may be null. Though providing an id and tooltip is recommended.
 336                  *
 337                  * By default the new link will be added to the end of the list. To
 338                  * add the link before a given existing item, pass the DOM node
 339                  * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
 340                  * (e.g. `'#foobar'`) for that item.
 341                  *
 342                  *     mw.util.addPortletLink(
 343                  *         'p-tb', 'http://mediawiki.org/',
 344                  *         'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 345                  *     );
 346                  *
 347                  * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 348                  * @param {string} href Link URL
 349                  * @param {string} text Link text
 350                  * @param {string} [id] ID of the new item, should be unique and preferably have
 351                  *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 352                  * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
 353                  * @param {string} [accesskey] Access key to activate this link (one character, try
 354                  *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
 355                  *  see if 'x' is already used.
 356                  * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
 357                  *  the new item should be added before, should be another item in the same
 358                  *  list, it will be ignored otherwise
 359                  *
 360                  * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
 361                  * depending on the skin) or null if no element was added to the document.
 362                  */
 363                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 364                         var $item, $link, $portlet, $ul;
 365
 366                         // Check if there's atleast 3 arguments to prevent a TypeError
 367                         if ( arguments.length < 3 ) {
 368                                 return null;
 369                         }
 370                         // Setup the anchor tag
 371                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 372                         if ( tooltip ) {
 373                                 $link.attr( 'title', tooltip );
 374                         }
 375
 376                         // Select the specified portlet
 377                         $portlet = $( '#' + portlet );
 378                         if ( $portlet.length === 0 ) {
 379                                 return null;
 380                         }
 381                         // Select the first (most likely only) unordered list inside the portlet
 382                         $ul = $portlet.find( 'ul' ).eq( 0 );
 383
 384                         // If it didn't have an unordered list yet, create it
 385                         if ( $ul.length === 0 ) {
 386
 387                                 $ul = $( '<ul>' );
 388
 389                                 // If there's no <div> inside, append it to the portlet directly
 390                                 if ( $portlet.find( 'div:first' ).length === 0 ) {
 391                                         $portlet.append( $ul );
 392                                 } else {
 393                                         // otherwise if there's a div (such as div.body or div.pBody)
 394                                         // append the <ul> to last (most likely only) div
 395                                         $portlet.find( 'div' ).eq( -1 ).append( $ul );
 396                                 }
 397                         }
 398                         // Just in case..
 399                         if ( $ul.length === 0 ) {
 400                                 return null;
 401                         }
 402
 403                         // Unhide portlet if it was hidden before
 404                         $portlet.removeClass( 'emptyPortlet' );
 405
 406                         // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 407                         // and back up the selector to the list item
 408                         if ( $portlet.hasClass( 'vectorTabs' ) ) {
 409                                 $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 410                         } else {
 411                                 $item = $link.wrap( '<li></li>' ).parent();
 412                         }
 413
 414                         // Implement the properties passed to the function
 415                         if ( id ) {
 416                                 $item.attr( 'id', id );
 417                         }
 418
 419                         if ( tooltip ) {
 420                                 // Trim any existing accesskey hint and the trailing space
 421                                 tooltip = $.trim( tooltip.replace( util.tooltipAccessKeyRegexp, '' ) );
 422                                 if ( accesskey ) {
 423                                         tooltip += ' [' + accesskey + ']';
 424                                 }
 425                                 $link.attr( 'title', tooltip );
 426                                 if ( accesskey ) {
 427                                         util.updateTooltipAccessKeys( $link );
 428                                 }
 429                         }
 430
 431                         if ( accesskey ) {
 432                                 $link.attr( 'accesskey', accesskey );
 433                         }
 434
 435                         if ( nextnode ) {
 436                                 if ( nextnode.nodeType || typeof nextnode === 'string' ) {
 437                                         // nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 438                                         // or nextnode is a CSS selector for jQuery
 439                                         nextnode = $ul.find( nextnode );
 440                                 } else if ( !nextnode.jquery || nextnode[0].parentNode !== $ul[0] ) {
 441                                         // Fallback
 442                                         $ul.append( $item );
 443                                         return $item[0];
 444                                 }
 445                                 if ( nextnode.length === 1 ) {
 446                                         // nextnode is a jQuery object that represents exactly one element
 447                                         nextnode.before( $item );
 448                                         return $item[0];
 449                                 }
 450                         }
 451
 452                         // Fallback (this is the default behavior)
 453                         $ul.append( $item );
 454                         return $item[0];
 455
 456                 },
 457
 458                 /**
 459                  * Add a little box at the top of the screen to inform the user of
 460                  * something, replacing any previous message.
 461                  * Calling with no arguments, with an empty string or null will hide the message
 462                  *
 463                  * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
 464                  * to allow CSS/JS to hide different boxes. null = no class used.
 465                  * @deprecated since 1.20 Use mw#notify
 466                  */
 467                 jsMessage: function ( message ) {
 468                         if ( !arguments.length || message === '' || message === null ) {
 469                                 return true;
 470                         }
 471                         if ( typeof message !== 'object' ) {
 472                                 message = $.parseHTML( message );
 473                         }
 474                         mw.notify( message, { autoHide: true, tag: 'legacy' } );
 475                         return true;
 476                 },
 477
 478                 /**
 479                  * Validate a string as representing a valid e-mail address
 480                  * according to HTML5 specification. Please note the specification
 481                  * does not validate a domain with one character.
 482                  *
 483                  * FIXME: should be moved to or replaced by a validation module.
 484                  *
 485                  * @param {string} mailtxt E-mail address to be validated.
 486                  * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
 487                  * as determined by validation.
 488                  */
 489                 validateEmail: function ( mailtxt ) {
 490                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 491
 492                         if ( mailtxt === '' ) {
 493                                 return null;
 494                         }
 495
 496                         // HTML5 defines a string as valid e-mail address if it matches
 497                         // the ABNF:
 498                         //      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 499                         // With:
 500                         // - atext      : defined in RFC 5322 section 3.2.3
 501                         // - ldh-str : defined in RFC 1034 section 3.5
 502                         //
 503                         // (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68)
 504                         // First, define the RFC 5322 'atext' which is pretty easy:
 505                         // atext = ALPHA / DIGIT / ; Printable US-ASCII
 506                         //     "!" / "#" /    ; characters not including
 507                         //     "$" / "%" /    ; specials. Used for atoms.
 508                         //     "&" / "'" /
 509                         //     "*" / "+" /
 510                         //     "-" / "/" /
 511                         //     "=" / "?" /
 512                         //     "^" / "_" /
 513                         //     "`" / "{" /
 514                         //     "|" / "}" /
 515                         //     "~"
 516                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 517
 518                         // Next define the RFC 1034 'ldh-str'
 519                         //      <domain> ::= <subdomain> | " "
 520                         //      <subdomain> ::= <label> | <subdomain> "." <label>
 521                         //      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 522                         //      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 523                         //      <let-dig-hyp> ::= <let-dig> | "-"
 524                         //      <let-dig> ::= <letter> | <digit>
 525                         rfc1034LdhStr = 'a-z0-9\\-';
 526
 527                         html5EmailRegexp = new RegExp(
 528                                 // start of string
 529                                 '^'
 530                                 +
 531                                 // User part which is liberal :p
 532                                 '[' + rfc5322Atext + '\\.]+'
 533                                 +
 534                                 // 'at'
 535                                 '@'
 536                                 +
 537                                 // Domain first part
 538                                 '[' + rfc1034LdhStr + ']+'
 539                                 +
 540                                 // Optional second part and following are separated by a dot
 541                                 '(?:\\.[' + rfc1034LdhStr + ']+)*'
 542                                 +
 543                                 // End of string
 544                                 '$',
 545                                 // RegExp is case insensitive
 546                                 'i'
 547                         );
 548                         return (null !== mailtxt.match( html5EmailRegexp ) );
 549                 },
 550
 551                 /**
 552                  * Note: borrows from IP::isIPv4
 553                  *
 554                  * @param {string} address
 555                  * @param {boolean} allowBlock
 556                  * @return {boolean}
 557                  */
 558                 isIPv4Address: function ( address, allowBlock ) {
 559                         if ( typeof address !== 'string' ) {
 560                                 return false;
 561                         }
 562
 563                         var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
 564                                 RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
 565                                 RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 566
 567                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
 568                 },
 569
 570                 /**
 571                  * Note: borrows from IP::isIPv6
 572                  *
 573                  * @param {string} address
 574                  * @param {boolean} allowBlock
 575                  * @return {boolean}
 576                  */
 577                 isIPv6Address: function ( address, allowBlock ) {
 578                         if ( typeof address !== 'string' ) {
 579                                 return false;
 580                         }
 581
 582                         var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
 583                                 RE_IPV6_ADD =
 584                         '(?:' + // starts with "::" (including "::")
 585                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 586                         '|' + // ends with "::" (except "::")
 587                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 588                         '|' + // contains no "::"
 589                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 590                         ')';
 591
 592                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
 593                                 return true;
 594                         }
 595
 596                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 597                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 598
 599                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
 600                                 && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
 601                 }
 602         };
 603
 604         mw.util = util;
 605
 606 }( mediaWiki, jQuery ) );