resources/src/mediawiki.special.upload/upload.js

   1 /**
   2  * JavaScript for Special:Upload
   3  *
   4  * @private
   5  * @class mw.special.upload
   6  * @singleton
   7  */
   8
   9 /* global Uint8Array */
  10
  11 ( function () {
  12         var uploadWarning, uploadTemplatePreview,
  13                 ajaxUploadDestCheck = mw.config.get( 'wgAjaxUploadDestCheck' ),
  14                 $license = $( '#wpLicense' );
  15
  16         window.wgUploadWarningObj = uploadWarning = {
  17                 responseCache: { '': '&nbsp;' },
  18                 nameToCheck: '',
  19                 typing: false,
  20                 delay: 500, // ms
  21                 timeoutID: false,
  22
  23                 keypress: function () {
  24                         if ( !ajaxUploadDestCheck ) {
  25                                 return;
  26                         }
  27
  28                         // Find file to upload
  29                         if ( !$( '#wpDestFile' ).length || !$( '#wpDestFile-warning' ).length ) {
  30                                 return;
  31                         }
  32
  33                         this.nameToCheck = $( '#wpDestFile' ).val();
  34
  35                         // Clear timer
  36                         if ( this.timeoutID ) {
  37                                 clearTimeout( this.timeoutID );
  38                         }
  39                         // Check response cache
  40                         if ( Object.prototype.hasOwnProperty.call( this.responseCache, this.nameToCheck ) ) {
  41                                 this.setWarning( this.responseCache[ this.nameToCheck ] );
  42                                 return;
  43                         }
  44
  45                         this.timeoutID = setTimeout( function () {
  46                                 uploadWarning.timeout();
  47                         }, this.delay );
  48                 },
  49
  50                 checkNow: function ( fname ) {
  51                         if ( !ajaxUploadDestCheck ) {
  52                                 return;
  53                         }
  54                         if ( this.timeoutID ) {
  55                                 clearTimeout( this.timeoutID );
  56                         }
  57                         this.nameToCheck = fname;
  58                         this.timeout();
  59                 },
  60
  61                 timeout: function () {
  62                         var $spinnerDestCheck, title;
  63                         if ( !ajaxUploadDestCheck || this.nameToCheck.trim() === '' ) {
  64                                 return;
  65                         }
  66                         $spinnerDestCheck = $.createSpinner().insertAfter( '#wpDestFile' );
  67                         title = mw.Title.newFromText( this.nameToCheck, mw.config.get( 'wgNamespaceIds' ).file );
  68
  69                         ( new mw.Api() ).get( {
  70                                 formatversion: 2,
  71                                 action: 'query',
  72                                 // If title is empty, user input is invalid, the API call will produce details about why
  73                                 titles: [ title ? title.getPrefixedText() : this.nameToCheck ],
  74                                 prop: 'imageinfo',
  75                                 iiprop: 'uploadwarning',
  76                                 errorformat: 'html',
  77                                 errorlang: mw.config.get( 'wgUserLanguage' )
  78                         } ).done( function ( result ) {
  79                                 var
  80                                         resultOut = '',
  81                                         page = result.query.pages[ 0 ];
  82                                 if ( page.imageinfo ) {
  83                                         resultOut = page.imageinfo[ 0 ].html;
  84                                 } else if ( page.invalidreason ) {
  85                                         resultOut = page.invalidreason.html;
  86                                 }
  87                                 uploadWarning.processResult( resultOut, uploadWarning.nameToCheck );
  88                         } ).always( function () {
  89                                 $spinnerDestCheck.remove();
  90                         } );
  91                 },
  92
  93                 processResult: function ( result, fileName ) {
  94                         this.setWarning( result );
  95                         this.responseCache[ fileName ] = result;
  96                 },
  97
  98                 setWarning: function ( warning ) {
  99                         var $warningBox = $( '#wpDestFile-warning' ),
 100                                 $warning = $( $.parseHTML( warning ) );
 101                         mw.hook( 'wikipage.content' ).fire( $warning );
 102                         $warningBox.empty().append( $warning );
 103
 104                         // Set a value in the form indicating that the warning is acknowledged and
 105                         // doesn't need to be redisplayed post-upload
 106                         if ( !warning ) {
 107                                 $( '#wpDestFileWarningAck' ).val( '' );
 108                                 $warningBox.removeAttr( 'class' );
 109                         } else {
 110                                 $( '#wpDestFileWarningAck' ).val( '1' );
 111                                 $warningBox.attr( 'class', 'mw-destfile-warning' );
 112                         }
 113
 114                 }
 115         };
 116
 117         window.wgUploadTemplatePreviewObj = uploadTemplatePreview = {
 118
 119                 responseCache: { '': '' },
 120
 121                 /**
 122                  * @param {jQuery} $element The element whose .val() will be previewed
 123                  * @param {jQuery} $previewContainer The container to display the preview in
 124                  */
 125                 getPreview: function ( $element, $previewContainer ) {
 126                         var template = $element.val(),
 127                                 $spinner;
 128
 129                         if ( Object.prototype.hasOwnProperty.call( this.responseCache, template ) ) {
 130                                 this.showPreview( this.responseCache[ template ], $previewContainer );
 131                                 return;
 132                         }
 133
 134                         $spinner = $.createSpinner().insertAfter( $element );
 135
 136                         ( new mw.Api() ).parse( '{{' + template + '}}', {
 137                                 title: $( '#wpDestFile' ).val() || 'File:Sample.jpg',
 138                                 prop: 'text',
 139                                 pst: true,
 140                                 uselang: mw.config.get( 'wgUserLanguage' )
 141                         } ).done( function ( result ) {
 142                                 uploadTemplatePreview.processResult( result, template, $previewContainer );
 143                         } ).always( function () {
 144                                 $spinner.remove();
 145                         } );
 146                 },
 147
 148                 processResult: function ( result, template, $previewContainer ) {
 149                         this.responseCache[ template ] = result;
 150                         this.showPreview( this.responseCache[ template ], $previewContainer );
 151                 },
 152
 153                 showPreview: function ( preview, $previewContainer ) {
 154                         $previewContainer.html( preview );
 155                 }
 156
 157         };
 158
 159         $( function () {
 160                 // AJAX wpDestFile warnings
 161                 if ( ajaxUploadDestCheck ) {
 162                         // Insert an event handler that fetches upload warnings when wpDestFile
 163                         // has been changed
 164                         $( '#wpDestFile' ).change( function () {
 165                                 uploadWarning.checkNow( $( this ).val() );
 166                         } );
 167                         // Insert a row where the warnings will be displayed just below the
 168                         // wpDestFile row
 169                         $( '#mw-htmlform-description tbody' ).append(
 170                                 $( '<tr>' ).append(
 171                                         $( '<td>' )
 172                                                 .attr( 'id', 'wpDestFile-warning' )
 173                                                 .attr( 'colspan', 2 )
 174                                 )
 175                         );
 176                 }
 177
 178                 if ( mw.config.get( 'wgAjaxLicensePreview' ) && $license.length ) {
 179                         // License selector check
 180                         $license.change( function () {
 181                                 // We might show a preview
 182                                 uploadTemplatePreview.getPreview( $license, $( '#mw-license-preview' ) );
 183                         } );
 184
 185                         // License selector table row
 186                         $license.closest( 'tr' ).after(
 187                                 $( '<tr>' ).append(
 188                                         $( '<td>' ),
 189                                         $( '<td>' ).attr( 'id', 'mw-license-preview' )
 190                                 )
 191                         );
 192                 }
 193
 194                 // fillDestFile setup
 195                 mw.config.get( 'wgUploadSourceIds' ).forEach( function ( sourceId ) {
 196                         $( '#' + sourceId ).change( function () {
 197                                 var path, slash, backslash, fname;
 198                                 if ( !mw.config.get( 'wgUploadAutoFill' ) ) {
 199                                         return;
 200                                 }
 201                                 // Remove any previously flagged errors
 202                                 $( '#mw-upload-permitted' ).attr( 'class', '' );
 203                                 $( '#mw-upload-prohibited' ).attr( 'class', '' );
 204
 205                                 path = $( this ).val();
 206                                 // Find trailing part
 207                                 slash = path.lastIndexOf( '/' );
 208                                 backslash = path.lastIndexOf( '\\' );
 209                                 if ( slash === -1 && backslash === -1 ) {
 210                                         fname = path;
 211                                 } else if ( slash > backslash ) {
 212                                         fname = path.slice( slash + 1 );
 213                                 } else {
 214                                         fname = path.slice( backslash + 1 );
 215                                 }
 216
 217                                 // Clear the filename if it does not have a valid extension.
 218                                 // URLs are less likely to have a useful extension, so don't include them in the
 219                                 // extension check.
 220                                 if (
 221                                         mw.config.get( 'wgCheckFileExtensions' ) &&
 222                                         mw.config.get( 'wgStrictFileExtensions' ) &&
 223                                         Array.isArray( mw.config.get( 'wgFileExtensions' ) ) &&
 224                                         $( this ).attr( 'id' ) !== 'wpUploadFileURL'
 225                                 ) {
 226                                         if (
 227                                                 fname.lastIndexOf( '.' ) === -1 ||
 228                                                 mw.config.get( 'wgFileExtensions' ).map( function ( element ) {
 229                                                         return element.toLowerCase();
 230                                                 } ).indexOf( fname.slice( fname.lastIndexOf( '.' ) + 1 ).toLowerCase() ) === -1
 231                                         ) {
 232                                                 // Not a valid extension
 233                                                 // Clear the upload and set mw-upload-permitted to error
 234                                                 $( this ).val( '' );
 235                                                 $( '#mw-upload-permitted' ).attr( 'class', 'error' );
 236                                                 $( '#mw-upload-prohibited' ).attr( 'class', 'error' );
 237                                                 // Clear wpDestFile as well
 238                                                 $( '#wpDestFile' ).val( '' );
 239
 240                                                 return false;
 241                                         }
 242                                 }
 243
 244                                 // Replace spaces by underscores
 245                                 fname = fname.replace( / /g, '_' );
 246                                 // Capitalise first letter if needed
 247                                 if ( mw.config.get( 'wgCapitalizeUploads' ) ) {
 248                                         fname = fname[ 0 ].toUpperCase() + fname.slice( 1 );
 249                                 }
 250
 251                                 // Output result
 252                                 if ( $( '#wpDestFile' ).length ) {
 253                                         // Call decodeURIComponent function to remove possible URL-encoded characters
 254                                         // from the file name (T32390). Especially likely with upload-form-url.
 255                                         // decodeURIComponent can throw an exception if input is invalid utf-8
 256                                         try {
 257                                                 $( '#wpDestFile' ).val( decodeURIComponent( fname ) );
 258                                         } catch ( err ) {
 259                                                 $( '#wpDestFile' ).val( fname );
 260                                         }
 261                                         uploadWarning.checkNow( fname );
 262                                 }
 263                         } );
 264                 } );
 265         } );
 266
 267         // Add a preview to the upload form
 268         $( function () {
 269                 /**
 270                  * Is the FileAPI available with sufficient functionality?
 271                  *
 272                  * @return {boolean}
 273                  */
 274                 function hasFileAPI() {
 275                         return window.FileReader !== undefined;
 276                 }
 277
 278                 /**
 279                  * Check if this is a recognizable image type...
 280                  * Also excludes files over 10M to avoid going insane on memory usage.
 281                  *
 282                  * TODO: Is there a way we can ask the browser what's supported in `<img>`s?
 283                  *
 284                  * TODO: Put SVG back after working around Firefox 7 bug <https://phabricator.wikimedia.org/T33643>
 285                  *
 286                  * @param {File} file
 287                  * @return {boolean}
 288                  */
 289                 function fileIsPreviewable( file ) {
 290                         var known = [ 'image/png', 'image/gif', 'image/jpeg', 'image/svg+xml' ],
 291                                 tooHuge = 10 * 1024 * 1024;
 292                         return ( known.indexOf( file.type ) !== -1 ) && file.size > 0 && file.size < tooHuge;
 293                 }
 294
 295                 /**
 296                  * Format a file size attractively.
 297                  *
 298                  * TODO: Match numeric formatting
 299                  *
 300                  * @param {number} s
 301                  * @return {string}
 302                  */
 303                 function prettySize( s ) {
 304                         var sizeMsgs = [ 'size-bytes', 'size-kilobytes', 'size-megabytes', 'size-gigabytes' ];
 305                         while ( s >= 1024 && sizeMsgs.length > 1 ) {
 306                                 s /= 1024;
 307                                 sizeMsgs = sizeMsgs.slice( 1 );
 308                         }
 309                         return mw.msg( sizeMsgs[ 0 ], Math.round( s ) );
 310                 }
 311
 312                 /**
 313                  * Start loading a file into memory; when complete, pass it as a
 314                  * data URL to the callback function. If the callbackBinary is set it will
 315                  * first be read as binary and afterwards as data URL. Useful if you want
 316                  * to do preprocessing on the binary data first.
 317                  *
 318                  * @param {File} file
 319                  * @param {Function} callback
 320                  * @param {Function} callbackBinary
 321                  */
 322                 function fetchPreview( file, callback, callbackBinary ) {
 323                         var reader = new FileReader();
 324                         if ( callbackBinary && 'readAsBinaryString' in reader ) {
 325                                 // To fetch JPEG metadata we need a binary string; start there.
 326                                 // TODO
 327                                 reader.onload = function () {
 328                                         callbackBinary( reader.result );
 329
 330                                         // Now run back through the regular code path.
 331                                         fetchPreview( file, callback );
 332                                 };
 333                                 reader.readAsBinaryString( file );
 334                         } else if ( callbackBinary && 'readAsArrayBuffer' in reader ) {
 335                                 // readAsArrayBuffer replaces readAsBinaryString
 336                                 // However, our JPEG metadata library wants a string.
 337                                 // So, this is going to be an ugly conversion.
 338                                 reader.onload = function () {
 339                                         var i,
 340                                                 buffer = new Uint8Array( reader.result ),
 341                                                 string = '';
 342                                         for ( i = 0; i < buffer.byteLength; i++ ) {
 343                                                 string += String.fromCharCode( buffer[ i ] );
 344                                         }
 345                                         callbackBinary( string );
 346
 347                                         // Now run back through the regular code path.
 348                                         fetchPreview( file, callback );
 349                                 };
 350                                 reader.readAsArrayBuffer( file );
 351                         } else if ( 'URL' in window && 'createObjectURL' in window.URL ) {
 352                                 // Supported in Firefox 4.0 and above <https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL>
 353                                 // WebKit has it in a namespace for now but that's ok. ;)
 354                                 //
 355                                 // Lifetime of this URL is until document close, which is fine
 356                                 // for Special:Upload -- if this code gets used on longer-running
 357                                 // pages, add a revokeObjectURL() when it's no longer needed.
 358                                 //
 359                                 // Prefer this over readAsDataURL for Firefox 7 due to bug reading
 360                                 // some SVG files from data URIs <https://bugzilla.mozilla.org/show_bug.cgi?id=694165>
 361                                 callback( window.URL.createObjectURL( file ) );
 362                         } else {
 363                                 // This ends up decoding the file to base-64 and back again, which
 364                                 // feels horribly inefficient.
 365                                 reader.onload = function () {
 366                                         callback( reader.result );
 367                                 };
 368                                 reader.readAsDataURL( file );
 369                         }
 370                 }
 371
 372                 /**
 373                  * Clear the file upload preview area.
 374                  */
 375                 function clearPreview() {
 376                         $( '#mw-upload-thumbnail' ).remove();
 377                 }
 378
 379                 /**
 380                  * Show a thumbnail preview of PNG, JPEG, GIF, and SVG files prior to upload
 381                  * in browsers supporting HTML5 FileAPI.
 382                  *
 383                  * As of this writing, known good:
 384                  *
 385                  * - Firefox 3.6+
 386                  * - Chrome 7.something
 387                  *
 388                  * TODO: Check file size limits and warn of likely failures
 389                  *
 390                  * @param {File} file
 391                  */
 392                 function showPreview( file ) {
 393                         var $canvas,
 394                                 ctx,
 395                                 meta,
 396                                 previewSize = 180,
 397                                 $spinner = $.createSpinner( { size: 'small', type: 'block' } )
 398                                         .css( { width: previewSize, height: previewSize } ),
 399                                 thumb = mw.template.get( 'mediawiki.special.upload', 'thumbnail.html' ).render();
 400
 401                         thumb
 402                                 .find( '.filename' ).text( file.name ).end()
 403                                 .find( '.fileinfo' ).text( prettySize( file.size ) ).end()
 404                                 .find( '.thumbinner' ).prepend( $spinner ).end();
 405
 406                         $canvas = $( '<canvas>' ).attr( { width: previewSize, height: previewSize } );
 407                         ctx = $canvas[ 0 ].getContext( '2d' );
 408                         $( '#mw-htmlform-source' ).parent().prepend( thumb );
 409
 410                         fetchPreview( file, function ( dataURL ) {
 411                                 var img = new Image(),
 412                                         rotation = 0;
 413
 414                                 if ( meta && meta.tiff && meta.tiff.Orientation ) {
 415                                         rotation = ( 360 - ( function () {
 416                                                 // See BitmapHandler class in PHP
 417                                                 switch ( meta.tiff.Orientation.value ) {
 418                                                         case 8:
 419                                                                 return 90;
 420                                                         case 3:
 421                                                                 return 180;
 422                                                         case 6:
 423                                                                 return 270;
 424                                                         default:
 425                                                                 return 0;
 426                                                 }
 427                                         }() ) ) % 360;
 428                                 }
 429
 430                                 img.onload = function () {
 431                                         var info, width, height, x, y, dx, dy, logicalWidth, logicalHeight;
 432
 433                                         // Fit the image within the previewSizexpreviewSize box
 434                                         if ( img.width > img.height ) {
 435                                                 width = previewSize;
 436                                                 height = img.height / img.width * previewSize;
 437                                         } else {
 438                                                 height = previewSize;
 439                                                 width = img.width / img.height * previewSize;
 440                                         }
 441                                         // Determine the offset required to center the image
 442                                         dx = ( 180 - width ) / 2;
 443                                         dy = ( 180 - height ) / 2;
 444                                         switch ( rotation ) {
 445                                                 // If a rotation is applied, the direction of the axis
 446                                                 // changes as well. You can derive the values below by
 447                                                 // drawing on paper an axis system, rotate it and see
 448                                                 // where the positive axis direction is
 449                                                 case 0:
 450                                                         x = dx;
 451                                                         y = dy;
 452                                                         logicalWidth = img.width;
 453                                                         logicalHeight = img.height;
 454                                                         break;
 455                                                 case 90:
 456
 457                                                         x = dx;
 458                                                         y = dy - previewSize;
 459                                                         logicalWidth = img.height;
 460                                                         logicalHeight = img.width;
 461                                                         break;
 462                                                 case 180:
 463                                                         x = dx - previewSize;
 464                                                         y = dy - previewSize;
 465                                                         logicalWidth = img.width;
 466                                                         logicalHeight = img.height;
 467                                                         break;
 468                                                 case 270:
 469                                                         x = dx - previewSize;
 470                                                         y = dy;
 471                                                         logicalWidth = img.height;
 472                                                         logicalHeight = img.width;
 473                                                         break;
 474                                         }
 475
 476                                         ctx.clearRect( 0, 0, 180, 180 );
 477                                         ctx.rotate( rotation / 180 * Math.PI );
 478                                         ctx.drawImage( img, x, y, width, height );
 479                                         $spinner.replaceWith( $canvas );
 480
 481                                         // Image size
 482                                         info = mw.msg( 'widthheight', logicalWidth, logicalHeight ) +
 483                                                 ', ' + prettySize( file.size );
 484
 485                                         $( '#mw-upload-thumbnail .fileinfo' ).text( info );
 486                                 };
 487                                 img.onerror = function () {
 488                                         // Can happen for example for invalid SVG files
 489                                         clearPreview();
 490                                 };
 491                                 img.src = dataURL;
 492                         }, mw.config.get( 'wgFileCanRotate' ) ? function ( data ) {
 493                                 var jpegmeta = mw.loader.require( 'mediawiki.libs.jpegmeta' );
 494                                 try {
 495                                         meta = jpegmeta( data, file.fileName );
 496                                         // eslint-disable-next-line no-underscore-dangle, camelcase
 497                                         meta._binary_data = null;
 498                                 } catch ( e ) {
 499                                         meta = null;
 500                                 }
 501                         } : null );
 502                 }
 503
 504                 /**
 505                  * Check if the file does not exceed the maximum size
 506                  *
 507                  * @param {File} file
 508                  * @return {boolean}
 509                  */
 510                 function checkMaxUploadSize( file ) {
 511                         var maxSize, $error;
 512
 513                         function getMaxUploadSize( type ) {
 514                                 var sizes = mw.config.get( 'wgMaxUploadSize' );
 515
 516                                 if ( sizes[ type ] !== undefined ) {
 517                                         return sizes[ type ];
 518                                 }
 519                                 return sizes[ '*' ];
 520                         }
 521
 522                         $( '.mw-upload-source-error' ).remove();
 523
 524                         maxSize = getMaxUploadSize( 'file' );
 525                         if ( file.size > maxSize ) {
 526                                 $error = $( '<p class="error mw-upload-source-error" id="wpSourceTypeFile-error">' +
 527                                         mw.message( 'largefileserver', file.size, maxSize ).escaped() + '</p>' );
 528
 529                                 $( '#wpUploadFile' ).after( $error );
 530
 531                                 return false;
 532                         }
 533
 534                         return true;
 535                 }
 536
 537                 /* Initialization */
 538                 if ( hasFileAPI() ) {
 539                         // Update thumbnail when the file selection control is updated.
 540                         $( '#wpUploadFile' ).change( function () {
 541                                 var file;
 542                                 clearPreview();
 543                                 if ( this.files && this.files.length ) {
 544                                         // Note: would need to be updated to handle multiple files.
 545                                         file = this.files[ 0 ];
 546
 547                                         if ( !checkMaxUploadSize( file ) ) {
 548                                                 return;
 549                                         }
 550
 551                                         if ( fileIsPreviewable( file ) ) {
 552                                                 showPreview( file );
 553                                         }
 554                                 }
 555                         } );
 556                 }
 557         } );
 558
 559         // Disable all upload source fields except the selected one
 560         $( function () {
 561                 var $rows = $( '.mw-htmlform-field-UploadSourceField' );
 562
 563                 $rows.on( 'change', 'input[type="radio"]', function ( e ) {
 564                         var currentRow = e.delegateTarget;
 565
 566                         if ( !this.checked ) {
 567                                 return;
 568                         }
 569
 570                         $( '.mw-upload-source-error' ).remove();
 571
 572                         // Enable selected upload method
 573                         $( currentRow ).find( 'input' ).prop( 'disabled', false );
 574
 575                         // Disable inputs of other upload methods
 576                         // (except for the radio button to re-enable it)
 577                         $rows
 578                                 .not( currentRow )
 579                                 .find( 'input[type!="radio"]' )
 580                                 .prop( 'disabled', true );
 581                 } );
 582
 583                 // Set initial state
 584                 if ( !$( '#wpSourceTypeurl' ).prop( 'checked' ) ) {
 585                         $( '#wpUploadFileURL' ).prop( 'disabled', true );
 586                 }
 587         } );
 588
 589         $( function () {
 590                 // Prevent losing work
 591                 var allowCloseWindow,
 592                         $uploadForm = $( '#mw-upload-form' );
 593
 594                 if ( !mw.user.options.get( 'useeditwarning' ) ) {
 595                         // If the user doesn't want edit warnings, don't set things up.
 596                         return;
 597                 }
 598
 599                 $uploadForm.data( 'origtext', $uploadForm.serialize() );
 600
 601                 allowCloseWindow = mw.confirmCloseWindow( {
 602                         test: function () {
 603                                 return $( '#wpUploadFile' ).get( 0 ).files.length !== 0 ||
 604                                         $uploadForm.data( 'origtext' ) !== $uploadForm.serialize();
 605                         },
 606
 607                         message: mw.msg( 'editwarning-warning' ),
 608                         namespace: 'uploadwarning'
 609                 } );
 610
 611                 $uploadForm.submit( function () {
 612                         allowCloseWindow.release();
 613                 } );
 614         } );
 615
 616         // Add tabindex to mw-editTools
 617         $( function () {
 618                 // Function to change tabindex for all links within mw-editTools
 619                 function setEditTabindex( $val ) {
 620                         $( '.mw-editTools' ).find( 'a' ).each( function () {
 621                                 $( this ).attr( 'tabindex', $val );
 622                         } );
 623                 }
 624
 625                 // Change tabindex to 0 if user pressed spaced or enter while focused
 626                 $( '.mw-editTools' ).on( 'keypress', function ( e ) {
 627                         // Don't continue if pressed key was not enter or spacebar
 628                         if ( e.which !== 13 && e.which !== 32 ) {
 629                                 return;
 630                         }
 631
 632                         // Change tabindex only when main div has focus
 633                         if ( $( this ).is( ':focus' ) ) {
 634                                 $( this ).find( 'a' ).first().focus();
 635                                 setEditTabindex( '0' );
 636                         }
 637                 } );
 638
 639                 // Reset tabindex for elements when user focused out mw-editTools
 640                 $( '.mw-editTools' ).on( 'focusout', function ( e ) {
 641                         // Don't continue if relatedTarget is within mw-editTools
 642                         if ( e.relatedTarget !== null && $( e.relatedTarget ).closest( '.mw-editTools' ).length > 0 ) {
 643                                 return;
 644                         }
 645
 646                         // Reset tabindex back to -1
 647                         setEditTabindex( '-1' );
 648                 } );
 649
 650                 // Set initial tabindex for mw-editTools to 0 and to -1 for all links
 651                 $( '.mw-editTools' ).attr( 'tabindex', '0' );
 652                 setEditTabindex( '-1' );
 653         } );
 654 }() );