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                  * @param {Object} params A mapping of query parameter names to values,
 164                  *     e.g. { action: 'edit' }. Optional.
 165                  * @return {string} Location for a page with name of `str` or boolean false on error.
 166                  */
 167                 wikiGetlink: function ( str, params ) {
 168                         var url = mw.config.get( 'wgArticlePath' ).replace( '$1',
 169                                 util.wikiUrlencode( typeof str === 'string' ? str : mw.config.get( 'wgPageName' ) ) );
 170                         if ( params && !$.isEmptyObject( params ) ) {
 171                                 url += url.indexOf( '?' ) !== -1 ? '&' : '?';
 172                                 url += $.param( params );
 173                         }
 174                         return url;
 175                 },
 176
 177                 /**
 178                  * Get address to a script in the wiki root.
 179                  * For index.php use `mw.config.get( 'wgScript' )`.
 180                  *
 181                  * @since 1.18
 182                  * @param str string Name of script (eg. 'api'), defaults to 'index'
 183                  * @return string Address to script (eg. '/w/api.php' )
 184                  */
 185                 wikiScript: function ( str ) {
 186                         str = str || 'index';
 187                         if ( str === 'index' ) {
 188                                 return mw.config.get( 'wgScript' );
 189                         } else if ( str === 'load' ) {
 190                                 return mw.config.get( 'wgLoadScript' );
 191                         } else {
 192                                 return mw.config.get( 'wgScriptPath' ) + '/' + str +
 193                                         mw.config.get( 'wgScriptExtension' );
 194                         }
 195                 },
 196
 197                 /**
 198                  * Append a new style block to the head and return the CSSStyleSheet object.
 199                  * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
 200                  * This function returns the styleSheet object for convience (due to cross-browsers
 201                  * difference as to where it is located).
 202                  *
 203                  *     var sheet = mw.util.addCSS('.foobar { display: none; }');
 204                  *     $(foo).click(function () {
 205                  *         // Toggle the sheet on and off
 206                  *         sheet.disabled = !sheet.disabled;
 207                  *     });
 208                  *
 209                  * @param {string} text CSS to be appended
 210                  * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
 211                  */
 212                 addCSS: function ( text ) {
 213                         var s = mw.loader.addStyleTag( text );
 214                         return s.sheet || s;
 215                 },
 216
 217                 /**
 218                  * Hide/show the table of contents element
 219                  *
 220                  * @param {jQuery} $toggleLink A jQuery object of the toggle link.
 221                  * @param {Function} [callback] Function to be called after the toggle is
 222                  *  completed (including the animation).
 223                  * @return {Mixed} Boolean visibility of the toc (true if it's visible)
 224                  * or Null if there was no table of contents.
 225                  */
 226                 toggleToc: function ( $toggleLink, callback ) {
 227                         var $tocList = $( '#toc ul:first' );
 228
 229                         // This function shouldn't be called if there's no TOC,
 230                         // but just in case...
 231                         if ( $tocList.length ) {
 232                                 if ( $tocList.is( ':hidden' ) ) {
 233                                         $tocList.slideDown( 'fast', callback );
 234                                         $toggleLink.text( mw.msg( 'hidetoc' ) );
 235                                         $( '#toc' ).removeClass( 'tochidden' );
 236                                         $.cookie( 'mw_hidetoc', null, {
 237                                                 expires: 30,
 238                                                 path: '/'
 239                                         } );
 240                                         return true;
 241                                 } else {
 242                                         $tocList.slideUp( 'fast', callback );
 243                                         $toggleLink.text( mw.msg( 'showtoc' ) );
 244                                         $( '#toc' ).addClass( 'tochidden' );
 245                                         $.cookie( 'mw_hidetoc', '1', {
 246                                                 expires: 30,
 247                                                 path: '/'
 248                                         } );
 249                                         return false;
 250                                 }
 251                         } else {
 252                                 return null;
 253                         }
 254                 },
 255
 256                 /**
 257                  * Grab the URL parameter value for the given parameter.
 258                  * Returns null if not found.
 259                  *
 260                  * @param {string} param The parameter name.
 261                  * @param {string} [url=document.location.href] URL to search through, defaulting to the current document's URL.
 262                  * @return {Mixed} Parameter value or null.
 263                  */
 264                 getParamValue: function ( param, url ) {
 265                         if ( url === undefined ) {
 266                                 url = document.location.href;
 267                         }
 268                         // Get last match, stop at hash
 269                         var     re = new RegExp( '^[^#]*[&?]' + $.escapeRE( param ) + '=([^&#]*)' ),
 270                                 m = re.exec( url );
 271                         if ( m ) {
 272                                 // Beware that decodeURIComponent is not required to understand '+'
 273                                 // by spec, as encodeURIComponent does not produce it.
 274                                 return decodeURIComponent( m[1].replace( /\+/g, '%20' ) );
 275                         }
 276                         return null;
 277                 },
 278
 279                 /**
 280                  * @property {string}
 281                  * Access key prefix. Will be re-defined based on browser/operating system
 282                  * detection in mw.util#init.
 283                  */
 284                 tooltipAccessKeyPrefix: 'alt-',
 285
 286                 /**
 287                  * @property {RegExp}
 288                  * Regex to match accesskey tooltips.
 289                  *
 290                  * Should match:
 291                  *
 292                  * - "ctrl-option-"
 293                  * - "alt-shift-"
 294                  * - "ctrl-alt-"
 295                  * - "ctrl-"
 296                  *
 297                  * The accesskey is matched in group $6.
 298                  */
 299                 tooltipAccessKeyRegexp: /\[(ctrl-)?(option-)?(alt-)?(shift-)?(esc-)?(.)\]$/,
 300
 301                 /**
 302                  * Add the appropriate prefix to the accesskey shown in the tooltip.
 303                  * If the nodeList parameter is given, only those nodes are updated;
 304                  * otherwise, all the nodes that will probably have accesskeys by
 305                  * default are updated.
 306                  *
 307                  * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
 308                  */
 309                 updateTooltipAccessKeys: function ( $nodes ) {
 310                         if ( !$nodes ) {
 311                                 // Rather than going into a loop of all anchor tags, limit to few elements that
 312                                 // contain the relevant anchor tags.
 313                                 // Input and label are rare enough that no such optimization is needed
 314                                 $nodes = $( '#column-one a, #mw-head a, #mw-panel a, #p-logo a, input, label' );
 315                         } else if ( !( $nodes instanceof $ ) ) {
 316                                 $nodes = $( $nodes );
 317                         }
 318
 319                         $nodes.attr( 'title', function ( i, val ) {
 320                                 if ( val && util.tooltipAccessKeyRegexp.test( val ) ) {
 321                                         return val.replace( util.tooltipAccessKeyRegexp,
 322                                                 '[' + util.tooltipAccessKeyPrefix + '$6]' );
 323                                 }
 324                                 return val;
 325                         } );
 326                 },
 327
 328                 /*
 329                  * @property {jQuery}
 330                  * A jQuery object that refers to the content area element.
 331                  * Populated by #init.
 332                  */
 333                 $content: null,
 334
 335                 /**
 336                  * Add a link to a portlet menu on the page, such as:
 337                  *
 338                  * p-cactions (Content actions), p-personal (Personal tools),
 339                  * p-navigation (Navigation), p-tb (Toolbox)
 340                  *
 341                  * The first three paramters are required, the others are optional and
 342                  * may be null. Though providing an id and tooltip is recommended.
 343                  *
 344                  * By default the new link will be added to the end of the list. To
 345                  * add the link before a given existing item, pass the DOM node
 346                  * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
 347                  * (e.g. `'#foobar'`) for that item.
 348                  *
 349                  *     mw.util.addPortletLink(
 350                  *         'p-tb', 'http://mediawiki.org/',
 351                  *         'MediaWiki.org', 't-mworg', 'Go to MediaWiki.org ', 'm', '#t-print'
 352                  *     );
 353                  *
 354                  * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 355                  * @param {string} href Link URL
 356                  * @param {string} text Link text
 357                  * @param {string} [id] ID of the new item, should be unique and preferably have
 358                  *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 359                  * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
 360                  * @param {string} [accesskey] Access key to activate this link (one character, try
 361                  *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
 362                  *  see if 'x' is already used.
 363                  * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
 364                  *  the new item should be added before, should be another item in the same
 365                  *  list, it will be ignored otherwise
 366                  *
 367                  * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
 368                  * depending on the skin) or null if no element was added to the document.
 369                  */
 370                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 371                         var $item, $link, $portlet, $ul;
 372
 373                         // Check if there's atleast 3 arguments to prevent a TypeError
 374                         if ( arguments.length < 3 ) {
 375                                 return null;
 376                         }
 377                         // Setup the anchor tag
 378                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 379                         if ( tooltip ) {
 380                                 $link.attr( 'title', tooltip );
 381                         }
 382
 383                         // Select the specified portlet
 384                         $portlet = $( '#' + portlet );
 385                         if ( $portlet.length === 0 ) {
 386                                 return null;
 387                         }
 388                         // Select the first (most likely only) unordered list inside the portlet
 389                         $ul = $portlet.find( 'ul' ).eq( 0 );
 390
 391                         // If it didn't have an unordered list yet, create it
 392                         if ( $ul.length === 0 ) {
 393
 394                                 $ul = $( '<ul>' );
 395
 396                                 // If there's no <div> inside, append it to the portlet directly
 397                                 if ( $portlet.find( 'div:first' ).length === 0 ) {
 398                                         $portlet.append( $ul );
 399                                 } else {
 400                                         // otherwise if there's a div (such as div.body or div.pBody)
 401                                         // append the <ul> to last (most likely only) div
 402                                         $portlet.find( 'div' ).eq( -1 ).append( $ul );
 403                                 }
 404                         }
 405                         // Just in case..
 406                         if ( $ul.length === 0 ) {
 407                                 return null;
 408                         }
 409
 410                         // Unhide portlet if it was hidden before
 411                         $portlet.removeClass( 'emptyPortlet' );
 412
 413                         // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 414                         // and back up the selector to the list item
 415                         if ( $portlet.hasClass( 'vectorTabs' ) ) {
 416                                 $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 417                         } else {
 418                                 $item = $link.wrap( '<li></li>' ).parent();
 419                         }
 420
 421                         // Implement the properties passed to the function
 422                         if ( id ) {
 423                                 $item.attr( 'id', id );
 424                         }
 425
 426                         if ( tooltip ) {
 427                                 // Trim any existing accesskey hint and the trailing space
 428                                 tooltip = $.trim( tooltip.replace( util.tooltipAccessKeyRegexp, '' ) );
 429                                 if ( accesskey ) {
 430                                         tooltip += ' [' + accesskey + ']';
 431                                 }
 432                                 $link.attr( 'title', tooltip );
 433                                 if ( accesskey ) {
 434                                         util.updateTooltipAccessKeys( $link );
 435                                 }
 436                         }
 437
 438                         if ( accesskey ) {
 439                                 $link.attr( 'accesskey', accesskey );
 440                         }
 441
 442                         if ( nextnode ) {
 443                                 if ( nextnode.nodeType || typeof nextnode === 'string' ) {
 444                                         // nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 445                                         // or nextnode is a CSS selector for jQuery
 446                                         nextnode = $ul.find( nextnode );
 447                                 } else if ( !nextnode.jquery || nextnode[0].parentNode !== $ul[0] ) {
 448                                         // Fallback
 449                                         $ul.append( $item );
 450                                         return $item[0];
 451                                 }
 452                                 if ( nextnode.length === 1 ) {
 453                                         // nextnode is a jQuery object that represents exactly one element
 454                                         nextnode.before( $item );
 455                                         return $item[0];
 456                                 }
 457                         }
 458
 459                         // Fallback (this is the default behavior)
 460                         $ul.append( $item );
 461                         return $item[0];
 462
 463                 },
 464
 465                 /**
 466                  * Add a little box at the top of the screen to inform the user of
 467                  * something, replacing any previous message.
 468                  * Calling with no arguments, with an empty string or null will hide the message
 469                  *
 470                  * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
 471                  * to allow CSS/JS to hide different boxes. null = no class used.
 472                  * @deprecated since 1.20 Use mw#notify
 473                  */
 474                 jsMessage: function ( message ) {
 475                         if ( !arguments.length || message === '' || message === null ) {
 476                                 return true;
 477                         }
 478                         if ( typeof message !== 'object' ) {
 479                                 message = $.parseHTML( message );
 480                         }
 481                         mw.notify( message, { autoHide: true, tag: 'legacy' } );
 482                         return true;
 483                 },
 484
 485                 /**
 486                  * Validate a string as representing a valid e-mail address
 487                  * according to HTML5 specification. Please note the specification
 488                  * does not validate a domain with one character.
 489                  *
 490                  * FIXME: should be moved to or replaced by a validation module.
 491                  *
 492                  * @param {string} mailtxt E-mail address to be validated.
 493                  * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
 494                  * as determined by validation.
 495                  */
 496                 validateEmail: function ( mailtxt ) {
 497                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 498
 499                         if ( mailtxt === '' ) {
 500                                 return null;
 501                         }
 502
 503                         // HTML5 defines a string as valid e-mail address if it matches
 504                         // the ABNF:
 505                         //      1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 506                         // With:
 507                         // - atext      : defined in RFC 5322 section 3.2.3
 508                         // - ldh-str : defined in RFC 1034 section 3.5
 509                         //
 510                         // (see STD 68 / RFC 5234 http://tools.ietf.org/html/std68)
 511                         // First, define the RFC 5322 'atext' which is pretty easy:
 512                         // atext = ALPHA / DIGIT / ; Printable US-ASCII
 513                         //     "!" / "#" /    ; characters not including
 514                         //     "$" / "%" /    ; specials. Used for atoms.
 515                         //     "&" / "'" /
 516                         //     "*" / "+" /
 517                         //     "-" / "/" /
 518                         //     "=" / "?" /
 519                         //     "^" / "_" /
 520                         //     "`" / "{" /
 521                         //     "|" / "}" /
 522                         //     "~"
 523                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 524
 525                         // Next define the RFC 1034 'ldh-str'
 526                         //      <domain> ::= <subdomain> | " "
 527                         //      <subdomain> ::= <label> | <subdomain> "." <label>
 528                         //      <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 529                         //      <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 530                         //      <let-dig-hyp> ::= <let-dig> | "-"
 531                         //      <let-dig> ::= <letter> | <digit>
 532                         rfc1034LdhStr = 'a-z0-9\\-';
 533
 534                         html5EmailRegexp = new RegExp(
 535                                 // start of string
 536                                 '^'
 537                                 +
 538                                 // User part which is liberal :p
 539                                 '[' + rfc5322Atext + '\\.]+'
 540                                 +
 541                                 // 'at'
 542                                 '@'
 543                                 +
 544                                 // Domain first part
 545                                 '[' + rfc1034LdhStr + ']+'
 546                                 +
 547                                 // Optional second part and following are separated by a dot
 548                                 '(?:\\.[' + rfc1034LdhStr + ']+)*'
 549                                 +
 550                                 // End of string
 551                                 '$',
 552                                 // RegExp is case insensitive
 553                                 'i'
 554                         );
 555                         return (null !== mailtxt.match( html5EmailRegexp ) );
 556                 },
 557
 558                 /**
 559                  * Note: borrows from IP::isIPv4
 560                  *
 561                  * @param {string} address
 562                  * @param {boolean} allowBlock
 563                  * @return {boolean}
 564                  */
 565                 isIPv4Address: function ( address, allowBlock ) {
 566                         if ( typeof address !== 'string' ) {
 567                                 return false;
 568                         }
 569
 570                         var     block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '',
 571                                 RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])',
 572                                 RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 573
 574                         return address.search( new RegExp( '^' + RE_IP_ADD + block + '$' ) ) !== -1;
 575                 },
 576
 577                 /**
 578                  * Note: borrows from IP::isIPv6
 579                  *
 580                  * @param {string} address
 581                  * @param {boolean} allowBlock
 582                  * @return {boolean}
 583                  */
 584                 isIPv6Address: function ( address, allowBlock ) {
 585                         if ( typeof address !== 'string' ) {
 586                                 return false;
 587                         }
 588
 589                         var     block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '',
 590                                 RE_IPV6_ADD =
 591                         '(?:' + // starts with "::" (including "::")
 592                         ':(?::|(?::' + '[0-9A-Fa-f]{1,4}' + '){1,7})' +
 593                         '|' + // ends with "::" (except "::")
 594                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){0,6}::' +
 595                         '|' + // contains no "::"
 596                         '[0-9A-Fa-f]{1,4}' + '(?::' + '[0-9A-Fa-f]{1,4}' + '){7}' +
 597                         ')';
 598
 599                         if ( address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1 ) {
 600                                 return true;
 601                         }
 602
 603                         RE_IPV6_ADD = // contains one "::" in the middle (single '::' check below)
 604                                 '[0-9A-Fa-f]{1,4}' + '(?:::?' + '[0-9A-Fa-f]{1,4}' + '){1,6}';
 605
 606                         return address.search( new RegExp( '^' + RE_IPV6_ADD + block + '$' ) ) !== -1
 607                                 && address.search( /::/ ) !== -1 && address.search( /::.*::/ ) === -1;
 608                 }
 609         };
 610
 611         mw.util = util;
 612
 613 }( mediaWiki, jQuery ) );