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                                                 : profile.platform === 'win'
  32                                                         // Chrome on Windows
  33                                                         // (both alt- and alt-shift work, but alt-f triggers Chrome wrench menu
  34                                                         // which alt-shift-f does not)
  35                                                         ? 'alt-shift-'
  36                                                         // Chrome on other (Ubuntu?)
  37                                                         : 'alt-'
  38                                 );
  39
  40                         // Non-Windows Safari with webkit_version > 526
  41                         } else if ( profile.platform !== 'win'
  42                                 && profile.name === 'safari'
  43                                 && profile.layoutVersion > 526 ) {
  44                                 util.tooltipAccessKeyPrefix = 'ctrl-alt-';
  45                         // Firefox 14+ on Mac
  46                         } else if ( profile.platform === 'mac'
  47                                 && profile.name === 'firefox'
  48                                 && profile.versionNumber >= 14 ) {
  49                                 util.tooltipAccessKeyPrefix = 'ctrl-option-';
  50                         // Safari/Konqueror on any platform, or any browser on Mac
  51                         // (but not Safari on Windows)
  52                         } else if ( !( profile.platform === 'win' && profile.name === 'safari' )
  53                                                         && ( profile.name === 'safari'
  54                                                         || profile.platform === 'mac'
  55                                                         || profile.name === 'konqueror' ) ) {
  56                                 util.tooltipAccessKeyPrefix = 'ctrl-';
  57
  58                         // Firefox 2.x and later
  59                         } else if ( profile.name === 'firefox' && profile.versionBase > '1' ) {
  60                                 util.tooltipAccessKeyPrefix = 'alt-shift-';
  61                         }
  62
  63                         /* Fill $content var */
  64                         util.$content = ( function () {
  65                                 var i, l, $content, selectors;
  66                                 selectors = [
  67                                         // The preferred standard for setting $content (class="mw-body")
  68                                         // You may also use (class="mw-body mw-body-primary") if you use
  69                                         // mw-body in multiple locations.
  70                                         // Or class="mw-body-primary" if you want $content to be deeper
  71                                         // in the dom than mw-body
  72                                         '.mw-body-primary',
  73                                         '.mw-body',
  74
  75                                         /* Legacy fallbacks for setting the content */
  76                                         // Vector, Monobook, Chick, etc... based skins
  77                                         '#bodyContent',
  78
  79                                         // Modern based skins
  80                                         '#mw_contentholder',
  81
  82                                         // Standard, CologneBlue
  83                                         '#article',
  84
  85                                         // #content is present on almost all if not all skins. Most skins (the above cases)
  86                                         // have #content too, but as an outer wrapper instead of the article text container.
  87                                         // The skins that don't have an outer wrapper do have #content for everything
  88                                         // so it's a good fallback
  89                                         '#content',
  90
  91                                         // If nothing better is found fall back to our bodytext div that is guaranteed to be here
  92                                         '#mw-content-text',
  93
  94                                         // Should never happen... well, it could if someone is not finished writing a skin and has
  95                                         // not inserted bodytext yet. But in any case <body> should always exist
  96                                         'body'
  97                                 ];
  98                                 for ( i = 0, l = selectors.length; i < l; i++ ) {
  99                                         $content = $( selectors[i] ).first();
 100                                         if ( $content.length ) {
 101                                                 return $content;
 102                                         }
 103                                 }
 104
 105                                 // Make sure we don't unset util.$content if it was preset and we don't find anything
 106                                 return util.$content;
 107                         } )();
 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 str string 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 str string 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 str String: 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                  * @example
 198                  * <code>
 199                  * var sheet = mw.util.addCSS('.foobar { display: none; }');
 200                  * $(foo).click(function () {
 201                  *     // Toggle the sheet on and off
 202                  *     sheet.disabled = !sheet.disabled;
 203                  * });
 204                  * </code>
 205                  *
 206                  * @param text string CSS to be appended
 207                  * @return CSSStyleSheet (use .ownerNode to get to the <style> element)
 208                  */
 209                 addCSS: function ( text ) {
 210                         var s = mw.loader.addStyleTag( text );
 211                         return s.sheet || s;
 212                 },
 213
 214                 /**
 215                  * Hide/show the table of contents element
 216                  *
 217                  * @param $toggleLink jQuery A jQuery object of the toggle link.
 218                  * @param callback function Function to be called after the toggle is
 219                  * completed (including the animation) (optional)
 220                  * @return mixed Boolean visibility of the toc (true if it's visible)
 221                  * or Null if there was no table of contents.
 222                  */
 223                 toggleToc: function ( $toggleLink, callback ) {
 224                         var $tocList = $( '#toc ul:first' );
 225
 226                         // This function shouldn't be called if there's no TOC,
 227                         // but just in case...
 228                         if ( $tocList.length ) {
 229                                 if ( $tocList.is( ':hidden' ) ) {
 230                                         $tocList.slideDown( 'fast', callback );
 231                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 232                                         $( '#toc' ).removeClass( 'tochidden' );
 233                                         $.cookie( 'mw_hidetoc', null, {
 234                                                 expires: 30,
 235                                                 path: '/'
 236                                         } );
 237                                         return true;
 238                                 } else {
 239                                         $tocList.slideUp( 'fast', callback );
 240                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 241                                         $( '#toc' ).addClass( 'tochidden' );
 242                                         $.cookie( 'mw_hidetoc', '1', {
 243                                                 expires: 30,
 244                                                 path: '/'
 245                                         } );
 246                                         return false;
 247                                 }
 248                         } else {
 249                                 return null;
 250                         }
 251                 },
 252
 253                 /**
 254                  * Grab the URL parameter value for the given parameter.
 255                  * Returns null if not found.
 256                  *
 257                  * @param param string The parameter name.
 258                  * @param url string URL to search through (optional)
 259                  * @return mixed Parameter value or null.
 260                  */
 261                 getParamValue: function ( param, url ) {
 262                         if ( url === undefined ) {
 263                                 url = document.location.href;
 264                         }
 265                         // Get last match, stop at hash
 266                         var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
 267                                 m = re.exec( url );
 268                         if ( m ) {
 269                                 // Beware that decodeURIComponent is not required to understand '+'
 270                                 // by spec, as encodeURIComponent does not produce it.
 271                                 return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
 272                         }
 273                         return null;
 274                 },
 275
 276                 /**
 277                  * @var string
 278                  * Access key prefix. Will be re-defined based on browser/operating system
 279                  * detection in mw.util.init().
 280                  */
 281                 tooltipAccessKeyPrefix: 'alt-',
 282
 283                 /**
 284                  * @var RegExp
 285                  * Regex to match accesskey tooltips.
 286                  */
 287                 tooltipAccessKeyRegexp: /\[(ctrl-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 288
 289                 /**
 290                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 291                  * If the nodeList parameter is given, only those nodes are updated;
 292                  * otherwise, all the nodes that will probably have accesskeys by
 293                  * default are updated.
 294                  *
 295                  * @param $nodes {Array|jQuery} [optional] A jQuery object, or array
 296                  * of elements to update.
 297                  */
 298                 updateTooltipAccessKeys: function ( $nodes ) {
 299                         if ( !$nodes ) {
 300                                 // Rather than going into a loop of all anchor tags, limit to few elements that
 301                                 // contain the relevant anchor tags.
 302                                 // Input and label are rare enough that no such optimization is needed
 303                                 $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
 304                         } else if ( !( $nodes instanceof $ ) ) {
 305                                 $nodes = $( $nodes );
 306                         }
 307
 308                         $nodes.attr( 'title', function ( i, val ) {
 309                                 if ( val && util.tooltipAccessKeyRegexp.exec( val ) ) {
 310                                         return val.replace( util.tooltipAccessKeyRegexp,
 311                                                 '[' + util.tooltipAccessKeyPrefix + '$5]' );
 312                                 }
 313                                 return val;
 314                         } );
 315                 },
 316
 317                 /*
 318                  * @var jQuery
 319                  * A jQuery object that refers to the content area element
 320                  * Populated by init().
 321                  */
 322                 $content: null,
 323
 324                 /**
 325                  * Add a link to a portlet menu on the page, such as:
 326                  *
 327                  * p-cactions (Content actions), p-personal (Personal tools),
 328                  * p-navigation (Navigation), p-tb (Toolbox)
 329                  *
 330                  * The first three paramters are required, the others are optional and
 331                  * may be null. Though providing an id and tooltip is recommended.
 332                  *
 333                  * By default the new link will be added to the end of the list. To
 334                  * add the link before a given existing item, pass the DOM node
 335                  * (document.getElementById( 'foobar' )) or the jQuery-selector
 336                  * ( '#foobar' ) of that item.
 337                  *
 338                  * @example mw.util.addPortletLink(
 339                  *       'p-tb', 'http://mediawiki.org/',
 340                  *       'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 341                  * )
 342                  *
 343                  * @param portlet string ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 344                  * @param href string Link URL
 345                  * @param text string Link text
 346                  * @param id string ID of the new item, should be unique and preferably have
 347                  * the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 348                  * @param tooltip string Text to show when hovering over the link, without accesskey suffix
 349                  * @param accesskey string Access key to activate this link (one character, try
 350                  * to avoid conflicts. Use $( '[accesskey=x]' ).get() in the console to
 351                  * see if 'x' is already used.
 352                  * @param nextnode mixed DOM Node or jQuery-selector string of the item that the new
 353                  * item should be added before, should be another item in the same
 354                  * list, it will be ignored otherwise
 355                  *
 356                  * @return mixed The DOM Node of the added item (a ListItem or Anchor element,
 357                  * depending on the skin) or null if no element was added to the document.
 358                  */
 359                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 360                         var $item, $link, $portlet, $ul;
 361
 362                         // Check if there's atleast 3 arguments to prevent a TypeError
 363                         if ( arguments.length < 3 ) {
 364                                 return null;
 365                         }
 366                         // Setup the anchor tag
 367                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 368                         if ( tooltip ) {
 369                                 $link.attr( 'title', tooltip );
 370                         }
 371
 372                         // Some skins don't have any portlets
 373                         // just add it to the bottom of their 'sidebar' element as a fallback
 374                         switch ( mw.config.get( 'skin' ) ) {
 375                         case 'standard':
 376                         case 'cologneblue':
 377                                 $( '#quickbar' ).append( $link.after( '<br/>' ) );
 378                                 return $link[0];
 379                         case 'nostalgia':
 380                                 $( '#searchform' ).before( $link ).before( ' &#124; ' );
 381                                 return $link[0];
 382                         default: // Skins like chick, modern, monobook, myskin, simple, vector...
 383
 384                                 // Select the specified portlet
 385                                 $portlet = $( '#' + portlet );
 386                                 if ( $portlet.length === 0 ) {
 387                                         return null;
 388                                 }
 389                                 // Select the first (most likely only) unordered list inside the portlet
 390                                 $ul = $portlet.find( 'ul' ).eq( 0 );
 391
 392                                 // If it didn't have an unordered list yet, create it
 393                                 if ( $ul.length === 0 ) {
 394
 395                                         $ul = $( '<ul>' );
 396
 397                                         // If there's no <div> inside, append it to the portlet directly
 398                                         if ( $portlet.find( 'div:first' ).length === 0 ) {
 399                                                 $portlet.append( $ul );
 400                                         } else {
 401                                                 // otherwise if there's a div (such as div.body or div.pBody)
 402                                                 // append the <ul> to last (most likely only) div
 403                                                 $portlet.find( 'div' ).eq( -1 ).append( $ul );
 404                                         }
 405                                 }
 406                                 // Just in case..
 407                                 if ( $ul.length === 0 ) {
 408                                         return null;
 409                                 }
 410
 411                                 // Unhide portlet if it was hidden before
 412                                 $portlet.removeClass( 'emptyPortlet' );
 413
 414                                 // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 415                                 // and back up the selector to the list item
 416                                 if ( $portlet.hasClass( 'vectorTabs' ) ) {
 417                                         $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 418                                 } else {
 419                                         $item = $link.wrap( '<li></li>' ).parent();
 420                                 }
 421
 422                                 // Implement the properties passed to the function
 423                                 if ( id ) {
 424                                         $item.attr( 'id', id );
 425                                 }
 426                                 if ( accesskey ) {
 427                                         $link.attr( 'accesskey', accesskey );
 428                                         tooltip += ' [' + accesskey + ']';
 429                                         $link.attr( 'title', tooltip );
 430                                 }
 431                                 if ( accesskey && tooltip ) {
 432                                         util.updateTooltipAccessKeys( $link );
 433                                 }
 434
 435                                 // Where to put our node ?
 436                                 // - nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 437                                 if ( nextnode && nextnode.parentNode === $ul[0] ) {
 438                                         $(nextnode).before( $item );
 439
 440                                 // - nextnode is a CSS selector for jQuery
 441                                 } else if ( typeof nextnode === 'string' && $ul.find( nextnode ).length !== 0 ) {
 442                                         $ul.find( nextnode ).eq( 0 ).before( $item );
 443
 444                                 // If the jQuery selector isn't found within the <ul>,
 445                                 // or if nextnode was invalid or not passed at all,
 446                                 // then just append it at the end of the <ul> (this is the default behaviour)
 447                                 } else {
 448                                         $ul.append( $item );
 449                                 }
 450
 451
 452                                 return $item[0];
 453                         }
 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 message {mixed} 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                  * @depreceated 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                  * @todo FIXME: should be moved to or replaced by a JavaScript validation module.
 482                  *
 483                  * @param mailtxt string E-mail address to be validated.
 484                  * @return mixed Null if mailtxt was an empty string, otherwise true/false
 485                  * is determined by validation.
 486                  */
 487                 validateEmail: function ( mailtxt ) {
 488                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 489
 490                         if ( mailtxt === '' ) {
 491                                 return null;
 492                         }
 493
 494                         /**
 495                          * HTML5 defines a string as valid e-mail address if it matches
 496                          * the ABNF:
 497                          *      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 498                          * With:
 499                          * - atext      : defined in RFC 5322 section 3.2.3
 500                          * - ldh-str : defined in RFC 1034 section 3.5
 501                          *
 502                          * (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68):
 503                          */
 504
 505                         /**
 506                          * First, define the RFC 5322 'atext' which is pretty easy:
 507                          * atext = ALPHA / DIGIT / ; Printable US-ASCII
 508                                                  "!" / "#" /     ; characters not including
 509                                                  "$" / "%" /     ; specials. Used for atoms.
 510                                                  "&" / "'" /
 511                                                  "*" / "+" /
 512                                                  "-" / "/" /
 513                                                  "=" / "?" /
 514                                                  "^" / "_" /
 515                                                  "`" / "{" /
 516                                                  "|" / "}" /
 517                                                  "~"
 518                         */
 519                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 520
 521                         /**
 522                          * Next define the RFC 1034 'ldh-str'
 523                          *      <domain> ::= <subdomain> | " "
 524                          *      <subdomain> ::= <label> | <subdomain> "." <label>
 525                          *      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 526                          *      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 527                          *      <let-dig-hyp> ::= <let-dig> | "-"
 528                          *      <let-dig> ::= <letter> | <digit>
 529                          */
 530                         rfc1034LdhStr = 'a-z0-9\\-';
 531
 532                         html5EmailRegexp = new RegExp(
 533                                 // start of string
 534                                 '^'
 535                                 +
 536                                 // User part which is liberal :p
 537                                 '[' + rfc5322Atext + '\\.]+'
 538                                 +
 539                                 // 'at'
 540                                 '@'
 541                                 +
 542                                 // Domain first part
 543                                 '[' + rfc1034LdhStr + ']+'
 544                                 +
 545                                 // Optional second part and following are separated by a dot
 546                                 '(?:\\.[' + rfc1034LdhStr + ']+)*'
 547                                 +
 548                                 // End of string
 549                                 '$',
 550                                 // RegExp is case insensitive
 551                                 'i'
 552                         );
 553                         return (null !== mailtxt.match( html5EmailRegexp ) );
 554                 },
 555
 556                 /**
 557                  * Note: borrows from IP::isIPv4
 558                  *
 559                  * @param address string
 560                  * @param allowBlock boolean
 561                  * @return boolean
 562                  */
 563                 isIPv4Address: function ( address, allowBlock ) {
 564                         if ( typeof address !== 'string' ) {
 565                                 return false;
 566                         }
 567
 568                         var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
 569                                 RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
 570                                 RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 571
 572                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
 573                 },
 574
 575                 /**
 576                  * Note: borrows from IP::isIPv6
 577                  *
 578                  * @param address string
 579                  * @param allowBlock boolean
 580                  * @return boolean
 581                  */
 582                 isIPv6Address: function ( address, allowBlock ) {
 583                         if ( typeof address !== 'string' ) {
 584                                 return false;
 585                         }
 586
 587                         var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
 588                                 RE_IPV6_ADD =
 589                         '(?:' + // starts with "::" (including "::")
 590                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 591                         '|' + // ends with "::" (except "::")
 592                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 593                         '|' + // contains no "::"
 594                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 595                         ')';
 596
 597                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
 598                                 return true;
 599                         }
 600
 601                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 602                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 603
 604                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
 605                                 && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
 606                 }
 607         };
 608
 609         mw.util = util;
 610
 611 }( mediaWiki, jQuery ) );