resources/src/mediawiki/mediawiki.util.js

   1 ( function ( mw, $ ) {
   2         'use strict';
   3
   4         var util;
   5
   6         /**
   7          * Encode the string like PHP's rawurlencode
   8          * @ignore
   9          *
  10          * @param {string} str String to be encoded.
  11          * @return {string} Encoded string
  12          */
  13         function rawurlencode( str ) {
  14                 str = String( str );
  15                 return encodeURIComponent( str )
  16                         .replace( /!/g, '%21' ).replace( /'/g, '%27' ).replace( /\(/g, '%28' )
  17                         .replace( /\)/g, '%29' ).replace( /\*/g, '%2A' ).replace( /~/g, '%7E' );
  18         }
  19
  20         /**
  21          * Private helper function used by util.escapeId*()
  22          * @ignore
  23          *
  24          * @param {string} str String to be encoded
  25          * @param {string} mode Encoding mode, see documentation for $wgFragmentMode
  26          *     in DefaultSettings.php
  27          * @return {string} Encoded string
  28          */
  29         function escapeIdInternal( str, mode ) {
  30                 str = String( str );
  31
  32                 switch ( mode ) {
  33                         case 'html5':
  34                                 return str.replace( / /g, '_' );
  35                         case 'html5-legacy':
  36                                 str = str.replace( /[ \t\n\r\f_'"&#%]+/g, '_' )
  37                                         .replace( /^_+|_+$/, '' );
  38                                 if ( str === '' ) {
  39                                         str = '_';
  40                                 }
  41                                 return str;
  42                         case 'legacy':
  43                                 return rawurlencode( str.replace( / /g, '_' ) )
  44                                         .replace( /%3A/g, ':' )
  45                                         .replace( /%/g, '.' );
  46                         default:
  47                                 throw new Error( 'Unrecognized ID escaping mode ' + mode );
  48                 }
  49         }
  50
  51         /**
  52          * Utility library
  53          * @class mw.util
  54          * @singleton
  55          */
  56         util = {
  57
  58                 /* Main body */
  59
  60                 /**
  61                  * Encode the string like PHP's rawurlencode
  62                  *
  63                  * @param {string} str String to be encoded.
  64                  * @return {string} Encoded string
  65                  */
  66                 rawurlencode: rawurlencode,
  67
  68                 /**
  69                  * Encode string into HTML id compatible form suitable for use in HTML
  70                  * Analog to PHP Sanitizer::escapeIdForAttribute()
  71                  *
  72                  * @since 1.30
  73                  *
  74                  * @param {string} str String to encode
  75                  * @return {string} Encoded string
  76                  */
  77                 escapeIdForAttribute: function ( str ) {
  78                         var mode = mw.config.get( 'wgFragmentMode' )[ 0 ];
  79
  80                         return escapeIdInternal( str, mode );
  81                 },
  82
  83                 /**
  84                  * Encode string into HTML id compatible form suitable for use in links
  85                  * Analog to PHP Sanitizer::escapeIdForLink()
  86                  *
  87                  * @since 1.30
  88                  *
  89                  * @param {string} str String to encode
  90                  * @return {string} Encoded string
  91                  */
  92                 escapeIdForLink: function ( str ) {
  93                         var mode = mw.config.get( 'wgFragmentMode' )[ 0 ];
  94
  95                         return escapeIdInternal( str, mode );
  96                 },
  97
  98                 /**
  99                  * Encode page titles for use in a URL
 100                  *
 101                  * We want / and : to be included as literal characters in our title URLs
 102                  * as they otherwise fatally break the title.
 103                  *
 104                  * The others are decoded because we can, it's prettier and matches behaviour
 105                  * of `wfUrlencode` in PHP.
 106                  *
 107                  * @param {string} str String to be encoded.
 108                  * @return {string} Encoded string
 109                  */
 110                 wikiUrlencode: function ( str ) {
 111                         return util.rawurlencode( str )
 112                                 .replace( /%20/g, '_' )
 113                                 // wfUrlencode replacements
 114                                 .replace( /%3B/g, ';' )
 115                                 .replace( /%40/g, '@' )
 116                                 .replace( /%24/g, '$' )
 117                                 .replace( /%21/g, '!' )
 118                                 .replace( /%2A/g, '*' )
 119                                 .replace( /%28/g, '(' )
 120                                 .replace( /%29/g, ')' )
 121                                 .replace( /%2C/g, ',' )
 122                                 .replace( /%2F/g, '/' )
 123                                 .replace( /%7E/g, '~' )
 124                                 .replace( /%3A/g, ':' );
 125                 },
 126
 127                 /**
 128                  * Get the link to a page name (relative to `wgServer`),
 129                  *
 130                  * @param {string|null} [pageName=wgPageName] Page name
 131                  * @param {Object} [params] A mapping of query parameter names to values,
 132                  *  e.g. `{ action: 'edit' }`
 133                  * @return {string} Url of the page with name of `pageName`
 134                  */
 135                 getUrl: function ( pageName, params ) {
 136                         var titleFragmentStart, url, query,
 137                                 fragment = '',
 138                                 title = typeof pageName === 'string' ? pageName : mw.config.get( 'wgPageName' );
 139
 140                         // Find any fragment
 141                         titleFragmentStart = title.indexOf( '#' );
 142                         if ( titleFragmentStart !== -1 ) {
 143                                 fragment = title.slice( titleFragmentStart + 1 );
 144                                 // Exclude the fragment from the page name
 145                                 title = title.slice( 0, titleFragmentStart );
 146                         }
 147
 148                         // Produce query string
 149                         if ( params ) {
 150                                 query = $.param( params );
 151                         }
 152                         if ( query ) {
 153                                 url = title ?
 154                                         util.wikiScript() + '?title=' + util.wikiUrlencode( title ) + '&' + query :
 155                                         util.wikiScript() + '?' + query;
 156                         } else {
 157                                 url = mw.config.get( 'wgArticlePath' )
 158                                         .replace( '$1', util.wikiUrlencode( title ).replace( /\$/g, '$$$$' ) );
 159                         }
 160
 161                         // Append the encoded fragment
 162                         if ( fragment.length ) {
 163                                 url += '#' + util.escapeIdForLink( fragment );
 164                         }
 165
 166                         return url;
 167                 },
 168
 169                 /**
 170                  * Get address to a script in the wiki root.
 171                  * For index.php use `mw.config.get( 'wgScript' )`.
 172                  *
 173                  * @since 1.18
 174                  * @param {string} str Name of script (e.g. 'api'), defaults to 'index'
 175                  * @return {string} Address to script (e.g. '/w/api.php' )
 176                  */
 177                 wikiScript: function ( str ) {
 178                         str = str || 'index';
 179                         if ( str === 'index' ) {
 180                                 return mw.config.get( 'wgScript' );
 181                         } else if ( str === 'load' ) {
 182                                 return mw.config.get( 'wgLoadScript' );
 183                         } else {
 184                                 return mw.config.get( 'wgScriptPath' ) + '/' + str + '.php';
 185                         }
 186                 },
 187
 188                 /**
 189                  * Append a new style block to the head and return the CSSStyleSheet object.
 190                  * Use .ownerNode to access the `<style>` element, or use mw.loader#addStyleTag.
 191                  * This function returns the styleSheet object for convience (due to cross-browsers
 192                  * difference as to where it is located).
 193                  *
 194                  *     var sheet = util.addCSS( '.foobar { display: none; }' );
 195                  *     $( foo ).click( function () {
 196                  *         // Toggle the sheet on and off
 197                  *         sheet.disabled = !sheet.disabled;
 198                  *     } );
 199                  *
 200                  * @param {string} text CSS to be appended
 201                  * @return {CSSStyleSheet} Use .ownerNode to get to the `<style>` element.
 202                  */
 203                 addCSS: function ( text ) {
 204                         var s = mw.loader.addStyleTag( text );
 205                         return s.sheet || s.styleSheet || s;
 206                 },
 207
 208                 /**
 209                  * Grab the URL parameter value for the given parameter.
 210                  * Returns null if not found.
 211                  *
 212                  * @param {string} param The parameter name.
 213                  * @param {string} [url=location.href] URL to search through, defaulting to the current browsing location.
 214                  * @return {Mixed} Parameter value or null.
 215                  */
 216                 getParamValue: function ( param, url ) {
 217                         // Get last match, stop at hash
 218                         var     re = new RegExp( '^[^#]*[&?]' + mw.RegExp.escape( param ) + '=([^&#]*)' ),
 219                                 m = re.exec( url !== undefined ? url : location.href );
 220
 221                         if ( m ) {
 222                                 // Beware that decodeURIComponent is not required to understand '+'
 223                                 // by spec, as encodeURIComponent does not produce it.
 224                                 return decodeURIComponent( m[ 1 ].replace( /\+/g, '%20' ) );
 225                         }
 226                         return null;
 227                 },
 228
 229                 /**
 230                  * The content wrapper of the skin (e.g. `.mw-body`).
 231                  *
 232                  * Populated on document ready. To use this property,
 233                  * wait for `$.ready` and be sure to have a module dependency on
 234                  * `mediawiki.util` which will ensure
 235                  * your document ready handler fires after initialization.
 236                  *
 237                  * Because of the lazy-initialised nature of this property,
 238                  * you're discouraged from using it.
 239                  *
 240                  * If you need just the wikipage content (not any of the
 241                  * extra elements output by the skin), use `$( '#mw-content-text' )`
 242                  * instead. Or listen to mw.hook#wikipage_content which will
 243                  * allow your code to re-run when the page changes (e.g. live preview
 244                  * or re-render after ajax save).
 245                  *
 246                  * @property {jQuery}
 247                  */
 248                 $content: null,
 249
 250                 /**
 251                  * Add a link to a portlet menu on the page, such as:
 252                  *
 253                  * p-cactions (Content actions), p-personal (Personal tools),
 254                  * p-navigation (Navigation), p-tb (Toolbox)
 255                  *
 256                  * The first three parameters are required, the others are optional and
 257                  * may be null. Though providing an id and tooltip is recommended.
 258                  *
 259                  * By default the new link will be added to the end of the list. To
 260                  * add the link before a given existing item, pass the DOM node
 261                  * (e.g. `document.getElementById( 'foobar' )`) or a jQuery-selector
 262                  * (e.g. `'#foobar'`) for that item.
 263                  *
 264                  *     util.addPortletLink(
 265                  *         'p-tb', 'https://www.mediawiki.org/',
 266                  *         'mediawiki.org', 't-mworg', 'Go to mediawiki.org', 'm', '#t-print'
 267                  *     );
 268                  *
 269                  *     var node = util.addPortletLink(
 270                  *         'p-tb',
 271                  *         new mw.Title( 'Special:Example' ).getUrl(),
 272                  *         'Example'
 273                  *     );
 274                  *     $( node ).on( 'click', function ( e ) {
 275                  *         console.log( 'Example' );
 276                  *         e.preventDefault();
 277                  *     } );
 278                  *
 279                  * @param {string} portlet ID of the target portlet ( 'p-cactions' or 'p-personal' etc.)
 280                  * @param {string} href Link URL
 281                  * @param {string} text Link text
 282                  * @param {string} [id] ID of the new item, should be unique and preferably have
 283                  *  the appropriate prefix ( 'ca-', 'pt-', 'n-' or 't-' )
 284                  * @param {string} [tooltip] Text to show when hovering over the link, without accesskey suffix
 285                  * @param {string} [accesskey] Access key to activate this link (one character, try
 286                  *  to avoid conflicts. Use `$( '[accesskey=x]' ).get()` in the console to
 287                  *  see if 'x' is already used.
 288                  * @param {HTMLElement|jQuery|string} [nextnode] Element or jQuery-selector string to the item that
 289                  *  the new item should be added before, should be another item in the same
 290                  *  list, it will be ignored otherwise
 291                  *
 292                  * @return {HTMLElement|null} The added element (a ListItem or Anchor element,
 293                  * depending on the skin) or null if no element was added to the document.
 294                  */
 295                 addPortletLink: function ( portlet, href, text, id, tooltip, accesskey, nextnode ) {
 296                         var $item, $link, $portlet, $ul;
 297
 298                         // Check if there's at least 3 arguments to prevent a TypeError
 299                         if ( arguments.length < 3 ) {
 300                                 return null;
 301                         }
 302                         // Setup the anchor tag
 303                         $link = $( '<a>' ).attr( 'href', href ).text( text );
 304                         if ( tooltip ) {
 305                                 $link.attr( 'title', tooltip );
 306                         }
 307
 308                         // Select the specified portlet
 309                         $portlet = $( '#' + portlet );
 310                         if ( $portlet.length === 0 ) {
 311                                 return null;
 312                         }
 313                         // Select the first (most likely only) unordered list inside the portlet
 314                         $ul = $portlet.find( 'ul' ).eq( 0 );
 315
 316                         // If it didn't have an unordered list yet, create it
 317                         if ( $ul.length === 0 ) {
 318
 319                                 $ul = $( '<ul>' );
 320
 321                                 // If there's no <div> inside, append it to the portlet directly
 322                                 if ( $portlet.find( 'div:first' ).length === 0 ) {
 323                                         $portlet.append( $ul );
 324                                 } else {
 325                                         // otherwise if there's a div (such as div.body or div.pBody)
 326                                         // append the <ul> to last (most likely only) div
 327                                         $portlet.find( 'div' ).eq( -1 ).append( $ul );
 328                                 }
 329                         }
 330                         // Just in case..
 331                         if ( $ul.length === 0 ) {
 332                                 return null;
 333                         }
 334
 335                         // Unhide portlet if it was hidden before
 336                         $portlet.removeClass( 'emptyPortlet' );
 337
 338                         // Wrap the anchor tag in a list item (and a span if $portlet is a Vector tab)
 339                         // and back up the selector to the list item
 340                         if ( $portlet.hasClass( 'vectorTabs' ) ) {
 341                                 $item = $link.wrap( '<li><span></span></li>' ).parent().parent();
 342                         } else {
 343                                 $item = $link.wrap( '<li></li>' ).parent();
 344                         }
 345
 346                         // Implement the properties passed to the function
 347                         if ( id ) {
 348                                 $item.attr( 'id', id );
 349                         }
 350
 351                         if ( accesskey ) {
 352                                 $link.attr( 'accesskey', accesskey );
 353                         }
 354
 355                         if ( tooltip ) {
 356                                 $link.attr( 'title', tooltip );
 357                         }
 358
 359                         if ( nextnode ) {
 360                                 // Case: nextnode is a DOM element (was the only option before MW 1.17, in wikibits.js)
 361                                 // Case: nextnode is a CSS selector for jQuery
 362                                 if ( nextnode.nodeType || typeof nextnode === 'string' ) {
 363                                         nextnode = $ul.find( nextnode );
 364                                 } else if ( !nextnode.jquery ) {
 365                                         // Error: Invalid nextnode
 366                                         nextnode = undefined;
 367                                 }
 368                                 if ( nextnode && ( nextnode.length !== 1 || nextnode[ 0 ].parentNode !== $ul[ 0 ] ) ) {
 369                                         // Error: nextnode must resolve to a single node
 370                                         // Error: nextnode must have the associated <ul> as its parent
 371                                         nextnode = undefined;
 372                                 }
 373                         }
 374
 375                         // Case: nextnode is a jQuery-wrapped DOM element
 376                         if ( nextnode ) {
 377                                 nextnode.before( $item );
 378                         } else {
 379                                 // Fallback (this is the default behavior)
 380                                 $ul.append( $item );
 381                         }
 382
 383                         // Update tooltip for the access key after inserting into DOM
 384                         // to get a localized access key label (T69946).
 385                         $link.updateTooltipAccessKeys();
 386
 387                         return $item[ 0 ];
 388                 },
 389
 390                 /**
 391                  * Validate a string as representing a valid e-mail address
 392                  * according to HTML5 specification. Please note the specification
 393                  * does not validate a domain with one character.
 394                  *
 395                  * FIXME: should be moved to or replaced by a validation module.
 396                  *
 397                  * @param {string} mailtxt E-mail address to be validated.
 398                  * @return {boolean|null} Null if `mailtxt` was an empty string, otherwise true/false
 399                  * as determined by validation.
 400                  */
 401                 validateEmail: function ( mailtxt ) {
 402                         var rfc5322Atext, rfc1034LdhStr, html5EmailRegexp;
 403
 404                         if ( mailtxt === '' ) {
 405                                 return null;
 406                         }
 407
 408                         // HTML5 defines a string as valid e-mail address if it matches
 409                         // the ABNF:
 410                         //     1 * ( atext / "." ) "@" ldh-str 1*( "." ldh-str )
 411                         // With:
 412                         // - atext   : defined in RFC 5322 section 3.2.3
 413                         // - ldh-str : defined in RFC 1034 section 3.5
 414                         //
 415                         // (see STD 68 / RFC 5234 https://tools.ietf.org/html/std68)
 416                         // First, define the RFC 5322 'atext' which is pretty easy:
 417                         // atext = ALPHA / DIGIT / ; Printable US-ASCII
 418                         //     "!" / "#" /    ; characters not including
 419                         //     "$" / "%" /    ; specials. Used for atoms.
 420                         //     "&" / "'" /
 421                         //     "*" / "+" /
 422                         //     "-" / "/" /
 423                         //     "=" / "?" /
 424                         //     "^" / "_" /
 425                         //     "`" / "{" /
 426                         //     "|" / "}" /
 427                         //     "~"
 428                         rfc5322Atext = 'a-z0-9!#$%&\'*+\\-/=?^_`{|}~';
 429
 430                         // Next define the RFC 1034 'ldh-str'
 431                         //     <domain> ::= <subdomain> | " "
 432                         //     <subdomain> ::= <label> | <subdomain> "." <label>
 433                         //     <label> ::= <letter> [ [ <ldh-str> ] <let-dig> ]
 434                         //     <ldh-str> ::= <let-dig-hyp> | <let-dig-hyp> <ldh-str>
 435                         //     <let-dig-hyp> ::= <let-dig> | "-"
 436                         //     <let-dig> ::= <letter> | <digit>
 437                         rfc1034LdhStr = 'a-z0-9\\-';
 438
 439                         html5EmailRegexp = new RegExp(
 440                                 // start of string
 441                                 '^' +
 442                                 // User part which is liberal :p
 443                                 '[' + rfc5322Atext + '\\.]+' +
 444                                 // 'at'
 445                                 '@' +
 446                                 // Domain first part
 447                                 '[' + rfc1034LdhStr + ']+' +
 448                                 // Optional second part and following are separated by a dot
 449                                 '(?:\\.[' + rfc1034LdhStr + ']+)*' +
 450                                 // End of string
 451                                 '$',
 452                                 // RegExp is case insensitive
 453                                 'i'
 454                         );
 455                         return ( mailtxt.match( html5EmailRegexp ) !== null );
 456                 },
 457
 458                 /**
 459                  * Note: borrows from IP::isIPv4
 460                  *
 461                  * @param {string} address
 462                  * @param {boolean} allowBlock
 463                  * @return {boolean}
 464                  */
 465                 isIPv4Address: function ( address, allowBlock ) {
 466                         var block, RE_IP_BYTE, RE_IP_ADD;
 467
 468                         if ( typeof address !== 'string' ) {
 469                                 return false;
 470                         }
 471
 472                         block = allowBlock ? '(?:\\/(?:3[0-2]|[12]?\\d))?' : '';
 473                         RE_IP_BYTE = '(?:25[0-5]|2[0-4][0-9]|1[0-9][0-9]|0?[0-9]?[0-9])';
 474                         RE_IP_ADD = '(?:' + RE_IP_BYTE + '\\.){3}' + RE_IP_BYTE;
 475
 476                         return ( new RegExp( '^' + RE_IP_ADD + block + '$' ).test( address ) );
 477                 },
 478
 479                 /**
 480                  * Note: borrows from IP::isIPv6
 481                  *
 482                  * @param {string} address
 483                  * @param {boolean} allowBlock
 484                  * @return {boolean}
 485                  */
 486                 isIPv6Address: function ( address, allowBlock ) {
 487                         var block, RE_IPV6_ADD;
 488
 489                         if ( typeof address !== 'string' ) {
 490                                 return false;
 491                         }
 492
 493                         block = allowBlock ? '(?:\\/(?:12[0-8]|1[01][0-9]|[1-9]?\\d))?' : '';
 494                         RE_IPV6_ADD =
 495                                 '(?:' + // starts with "::" (including "::")
 496                                         ':(?::|(?::' +
 497                                                 '[0-9A-Fa-f]{1,4}' +
 498                                         '){1,7})' +
 499                                         '|' + // ends with "::" (except "::")
 500                                         '[0-9A-Fa-f]{1,4}' +
 501                                         '(?::' +
 502                                                 '[0-9A-Fa-f]{1,4}' +
 503                                         '){0,6}::' +
 504                                         '|' + // contains no "::"
 505                                         '[0-9A-Fa-f]{1,4}' +
 506                                         '(?::' +
 507                                                 '[0-9A-Fa-f]{1,4}' +
 508                                         '){7}' +
 509                                 ')';
 510
 511                         if ( new RegExp( '^' + RE_IPV6_ADD + block + '$' ).test( address ) ) {
 512                                 return true;
 513                         }
 514
 515                         // contains one "::" in the middle (single '::' check below)
 516                         RE_IPV6_ADD =
 517                                 '[0-9A-Fa-f]{1,4}' +
 518                                 '(?:::?' +
 519                                         '[0-9A-Fa-f]{1,4}' +
 520                                 '){1,6}';
 521
 522                         return (
 523                                 new RegExp( '^' + RE_IPV6_ADD + block + '$' ).test( address ) &&
 524                                 /::/.test( address ) &&
 525                                 !/::.*::/.test( address )
 526                         );
 527                 },
 528
 529                 /**
 530                  * Check whether a string is an IP address
 531                  *
 532                  * @since 1.25
 533                  * @param {string} address String to check
 534                  * @param {boolean} allowBlock True if a block of IPs should be allowed
 535                  * @return {boolean}
 536                  */
 537                 isIPAddress: function ( address, allowBlock ) {
 538                         return util.isIPv4Address( address, allowBlock ) ||
 539                                 util.isIPv6Address( address, allowBlock );
 540                 }
 541         };
 542
 543         /**
 544          * @method wikiGetlink
 545          * @inheritdoc #getUrl
 546          * @deprecated since 1.23 Use #getUrl instead.
 547          */
 548         mw.log.deprecate( util, 'wikiGetlink', util.getUrl, 'Use mw.util.getUrl instead.', 'mw.util.wikiGetlink' );
 549
 550         /**
 551          * Add the appropriate prefix to the accesskey shown in the tooltip.
 552          *
 553          * If the `$nodes` parameter is given, only those nodes are updated;
 554          * otherwise we update all elements with accesskeys on the page.
 555          *
 556          * @method updateTooltipAccessKeys
 557          * @param {Array|jQuery} [$nodes] A jQuery object, or array of nodes to update.
 558          * @deprecated since 1.24 Use the module jquery.accessKeyLabel instead.
 559          */
 560         mw.log.deprecate( util, 'updateTooltipAccessKeys', function ( $nodes ) {
 561                 if ( !$nodes ) {
 562                         $nodes = $( '[accesskey]' );
 563                 } else if ( !( $nodes instanceof $ ) ) {
 564                         $nodes = $( $nodes );
 565                 }
 566
 567                 $nodes.updateTooltipAccessKeys();
 568         }, 'Use jquery.accessKeyLabel instead.', 'mw.util.updateTooltipAccessKeys' );
 569
 570         /**
 571          * Add a little box at the top of the screen to inform the user of
 572          * something, replacing any previous message.
 573          * Calling with no arguments, with an empty string or null will hide the message
 574          *
 575          * @method jsMessage
 576          * @deprecated since 1.20 Use mw#notify
 577          * @param {Mixed} message The DOM-element, jQuery object or HTML-string to be put inside the message box.
 578          *  to allow CSS/JS to hide different boxes. null = no class used.
 579          */
 580         mw.log.deprecate( util, 'jsMessage', function ( message ) {
 581                 if ( !arguments.length || message === '' || message === null ) {
 582                         return true;
 583                 }
 584                 if ( typeof message !== 'object' ) {
 585                         message = $.parseHTML( message );
 586                 }
 587                 mw.notify( message, { autoHide: true, tag: 'legacy' } );
 588                 return true;
 589         }, 'Use mw.notify instead.', 'mw.util.jsMessage' );
 590
 591         /**
 592          * Encode the string like Sanitizer::escapeId() in PHP
 593          *
 594          * @method escapeId
 595          * @deprecated since 1.30 use escapeIdForAttribute() or escapeIdForLink()
 596          * @param {string} str String to be encoded.
 597          * @return {string} Encoded string
 598          */
 599         mw.log.deprecate( util, 'escapeId', function ( str ) {
 600                 return escapeIdInternal( str, 'legacy' );
 601         }, 'Use mw.util.escapeIdForAttribute or mw.util.escapeIdForLink instead.', 'mw.util.escapeId' );
 602
 603         /**
 604          * Initialisation of mw.util.$content
 605          */
 606         function init() {
 607                 util.$content = ( function () {
 608                         var i, l, $node, selectors;
 609
 610                         selectors = [
 611                                 // The preferred standard is class "mw-body".
 612                                 // You may also use class "mw-body mw-body-primary" if you use
 613                                 // mw-body in multiple locations. Or class "mw-body-primary" if
 614                                 // you use mw-body deeper in the DOM.
 615                                 '.mw-body-primary',
 616                                 '.mw-body',
 617
 618                                 // If the skin has no such class, fall back to the parser output
 619                                 '#mw-content-text'
 620                         ];
 621
 622                         for ( i = 0, l = selectors.length; i < l; i++ ) {
 623                                 $node = $( selectors[ i ] );
 624                                 if ( $node.length ) {
 625                                         return $node.first();
 626                                 }
 627                         }
 628
 629                         // Should never happen... well, it could if someone is not finished writing a
 630                         // skin and has not yet inserted bodytext yet.
 631                         return $( 'body' );
 632                 }() );
 633         }
 634
 635         /**
 636          * Former public initialisation. Now a no-op function.
 637          *
 638          * @method util_init
 639          * @deprecated since 1.30
 640          */
 641         mw.log.deprecate( util, 'init', $.noop, 'Remove the call of mw.util.init().', 'mw.util.init' );
 642
 643         $( init );
 644
 645         mw.util = util;
 646         module.exports = util;
 647
 648 }( mediaWiki, jQuery ) );