includes/htmlform/HTMLFormField.php

   1 <?php
   2
   3 /**
   4  * The parent class to generate form fields.  Any field type should
   5  * be a subclass of this.
   6  */
   7 abstract class HTMLFormField {
   8         public $mParams;
   9
  10         protected $mValidationCallback;
  11         protected $mFilterCallback;
  12         protected $mName;
  13         protected $mDir;
  14         protected $mLabel; # String label, as HTML. Set on construction.
  15         protected $mID;
  16         protected $mClass = '';
  17         protected $mVFormClass = '';
  18         protected $mHelpClass = false;
  19         protected $mDefault;
  20         /**
  21          * @var array|bool|null
  22          */
  23         protected $mOptions = false;
  24         protected $mOptionsLabelsNotFromMessage = false;
  25         protected $mHideIf = null;
  26
  27         /**
  28          * @var bool If true will generate an empty div element with no label
  29          * @since 1.22
  30          */
  31         protected $mShowEmptyLabels = true;
  32
  33         /**
  34          * @var HTMLForm|null
  35          */
  36         public $mParent;
  37
  38         /**
  39          * This function must be implemented to return the HTML to generate
  40          * the input object itself.  It should not implement the surrounding
  41          * table cells/rows, or labels/help messages.
  42          *
  43          * @param string $value The value to set the input to; eg a default
  44          *     text for a text input.
  45          *
  46          * @return string Valid HTML.
  47          */
  48         abstract public function getInputHTML( $value );
  49
  50         /**
  51          * Same as getInputHTML, but returns an OOUI object.
  52          * Defaults to false, which getOOUI will interpret as "use the HTML version"
  53          *
  54          * @param string $value
  55          * @return OOUI\Widget|false
  56          */
  57         public function getInputOOUI( $value ) {
  58                 return false;
  59         }
  60
  61         /**
  62          * True if this field type is able to display errors; false if validation errors need to be
  63          * displayed in the main HTMLForm error area.
  64          * @return bool
  65          */
  66         public function canDisplayErrors() {
  67                 return $this->hasVisibleOutput();
  68         }
  69
  70         /**
  71          * Get a translated interface message
  72          *
  73          * This is a wrapper around $this->mParent->msg() if $this->mParent is set
  74          * and wfMessage() otherwise.
  75          *
  76          * Parameters are the same as wfMessage().
  77          *
  78          * @return Message
  79          */
  80         public function msg() {
  81                 $args = func_get_args();
  82
  83                 if ( $this->mParent ) {
  84                         $callback = [ $this->mParent, 'msg' ];
  85                 } else {
  86                         $callback = 'wfMessage';
  87                 }
  88
  89                 return call_user_func_array( $callback, $args );
  90         }
  91
  92         /**
  93          * If this field has a user-visible output or not. If not,
  94          * it will not be rendered
  95          *
  96          * @return bool
  97          */
  98         public function hasVisibleOutput() {
  99                 return true;
 100         }
 101
 102         /**
 103          * Fetch a field value from $alldata for the closest field matching a given
 104          * name.
 105          *
 106          * This is complex because it needs to handle array fields like the user
 107          * would expect. The general algorithm is to look for $name as a sibling
 108          * of $this, then a sibling of $this's parent, and so on. Keeping in mind
 109          * that $name itself might be referencing an array.
 110          *
 111          * @param array $alldata
 112          * @param string $name
 113          * @return string
 114          */
 115         protected function getNearestFieldByName( $alldata, $name ) {
 116                 $tmp = $this->mName;
 117                 $thisKeys = [];
 118                 while ( preg_match( '/^(.+)\[([^\]]+)\]$/', $tmp, $m ) ) {
 119                         array_unshift( $thisKeys, $m[2] );
 120                         $tmp = $m[1];
 121                 }
 122                 if ( substr( $tmp, 0, 2 ) == 'wp' &&
 123                         !array_key_exists( $tmp, $alldata ) &&
 124                         array_key_exists( substr( $tmp, 2 ), $alldata )
 125                 ) {
 126                         // Adjust for name mangling.
 127                         $tmp = substr( $tmp, 2 );
 128                 }
 129                 array_unshift( $thisKeys, $tmp );
 130
 131                 $tmp = $name;
 132                 $nameKeys = [];
 133                 while ( preg_match( '/^(.+)\[([^\]]+)\]$/', $tmp, $m ) ) {
 134                         array_unshift( $nameKeys, $m[2] );
 135                         $tmp = $m[1];
 136                 }
 137                 array_unshift( $nameKeys, $tmp );
 138
 139                 $testValue = '';
 140                 for ( $i = count( $thisKeys ) - 1; $i >= 0; $i-- ) {
 141                         $keys = array_merge( array_slice( $thisKeys, 0, $i ), $nameKeys );
 142                         $data = $alldata;
 143                         while ( $keys ) {
 144                                 $key = array_shift( $keys );
 145                                 if ( !is_array( $data ) || !array_key_exists( $key, $data ) ) {
 146                                         continue 2;
 147                                 }
 148                                 $data = $data[$key];
 149                         }
 150                         $testValue = (string)$data;
 151                         break;
 152                 }
 153
 154                 return $testValue;
 155         }
 156
 157         /**
 158          * Helper function for isHidden to handle recursive data structures.
 159          *
 160          * @param array $alldata
 161          * @param array $params
 162          * @return bool
 163          * @throws MWException
 164          */
 165         protected function isHiddenRecurse( array $alldata, array $params ) {
 166                 $origParams = $params;
 167                 $op = array_shift( $params );
 168
 169                 try {
 170                         switch ( $op ) {
 171                                 case 'AND':
 172                                         foreach ( $params as $i => $p ) {
 173                                                 if ( !is_array( $p ) ) {
 174                                                         throw new MWException(
 175                                                                 "Expected array, found " . gettype( $p ) . " at index $i"
 176                                                         );
 177                                                 }
 178                                                 if ( !$this->isHiddenRecurse( $alldata, $p ) ) {
 179                                                         return false;
 180                                                 }
 181                                         }
 182                                         return true;
 183
 184                                 case 'OR':
 185                                         foreach ( $params as $i => $p ) {
 186                                                 if ( !is_array( $p ) ) {
 187                                                         throw new MWException(
 188                                                                 "Expected array, found " . gettype( $p ) . " at index $i"
 189                                                         );
 190                                                 }
 191                                                 if ( $this->isHiddenRecurse( $alldata, $p ) ) {
 192                                                         return true;
 193                                                 }
 194                                         }
 195                                         return false;
 196
 197                                 case 'NAND':
 198                                         foreach ( $params as $i => $p ) {
 199                                                 if ( !is_array( $p ) ) {
 200                                                         throw new MWException(
 201                                                                 "Expected array, found " . gettype( $p ) . " at index $i"
 202                                                         );
 203                                                 }
 204                                                 if ( !$this->isHiddenRecurse( $alldata, $p ) ) {
 205                                                         return true;
 206                                                 }
 207                                         }
 208                                         return false;
 209
 210                                 case 'NOR':
 211                                         foreach ( $params as $i => $p ) {
 212                                                 if ( !is_array( $p ) ) {
 213                                                         throw new MWException(
 214                                                                 "Expected array, found " . gettype( $p ) . " at index $i"
 215                                                         );
 216                                                 }
 217                                                 if ( $this->isHiddenRecurse( $alldata, $p ) ) {
 218                                                         return false;
 219                                                 }
 220                                         }
 221                                         return true;
 222
 223                                 case 'NOT':
 224                                         if ( count( $params ) !== 1 ) {
 225                                                 throw new MWException( "NOT takes exactly one parameter" );
 226                                         }
 227                                         $p = $params[0];
 228                                         if ( !is_array( $p ) ) {
 229                                                 throw new MWException(
 230                                                         "Expected array, found " . gettype( $p ) . " at index 0"
 231                                                 );
 232                                         }
 233                                         return !$this->isHiddenRecurse( $alldata, $p );
 234
 235                                 case '===':
 236                                 case '!==':
 237                                         if ( count( $params ) !== 2 ) {
 238                                                 throw new MWException( "$op takes exactly two parameters" );
 239                                         }
 240                                         list( $field, $value ) = $params;
 241                                         if ( !is_string( $field ) || !is_string( $value ) ) {
 242                                                 throw new MWException( "Parameters for $op must be strings" );
 243                                         }
 244                                         $testValue = $this->getNearestFieldByName( $alldata, $field );
 245                                         switch ( $op ) {
 246                                                 case '===':
 247                                                         return ( $value === $testValue );
 248                                                 case '!==':
 249                                                         return ( $value !== $testValue );
 250                                         }
 251
 252                                 default:
 253                                         throw new MWException( "Unknown operation" );
 254                         }
 255                 } catch ( Exception $ex ) {
 256                         throw new MWException(
 257                                 "Invalid hide-if specification for $this->mName: " .
 258                                 $ex->getMessage() . " in " . var_export( $origParams, true ),
 259                                 0, $ex
 260                         );
 261                 }
 262         }
 263
 264         /**
 265          * Test whether this field is supposed to be hidden, based on the values of
 266          * the other form fields.
 267          *
 268          * @since 1.23
 269          * @param array $alldata The data collected from the form
 270          * @return bool
 271          */
 272         public function isHidden( $alldata ) {
 273                 if ( !$this->mHideIf ) {
 274                         return false;
 275                 }
 276
 277                 return $this->isHiddenRecurse( $alldata, $this->mHideIf );
 278         }
 279
 280         /**
 281          * Override this function if the control can somehow trigger a form
 282          * submission that shouldn't actually submit the HTMLForm.
 283          *
 284          * @since 1.23
 285          * @param string|array $value The value the field was submitted with
 286          * @param array $alldata The data collected from the form
 287          *
 288          * @return bool True to cancel the submission
 289          */
 290         public function cancelSubmit( $value, $alldata ) {
 291                 return false;
 292         }
 293
 294         /**
 295          * Override this function to add specific validation checks on the
 296          * field input.  Don't forget to call parent::validate() to ensure
 297          * that the user-defined callback mValidationCallback is still run
 298          *
 299          * @param string|array $value The value the field was submitted with
 300          * @param array $alldata The data collected from the form
 301          *
 302          * @return bool|string|Message True on success, or String/Message error to display, or
 303          *   false to fail validation without displaying an error.
 304          */
 305         public function validate( $value, $alldata ) {
 306                 if ( $this->isHidden( $alldata ) ) {
 307                         return true;
 308                 }
 309
 310                 if ( isset( $this->mParams['required'] )
 311                         && $this->mParams['required'] !== false
 312                         && $value === ''
 313                 ) {
 314                         return $this->msg( 'htmlform-required' );
 315                 }
 316
 317                 if ( isset( $this->mValidationCallback ) ) {
 318                         return call_user_func( $this->mValidationCallback, $value, $alldata, $this->mParent );
 319                 }
 320
 321                 return true;
 322         }
 323
 324         public function filter( $value, $alldata ) {
 325                 if ( isset( $this->mFilterCallback ) ) {
 326                         $value = call_user_func( $this->mFilterCallback, $value, $alldata, $this->mParent );
 327                 }
 328
 329                 return $value;
 330         }
 331
 332         /**
 333          * Should this field have a label, or is there no input element with the
 334          * appropriate id for the label to point to?
 335          *
 336          * @return bool True to output a label, false to suppress
 337          */
 338         protected function needsLabel() {
 339                 return true;
 340         }
 341
 342         /**
 343          * Tell the field whether to generate a separate label element if its label
 344          * is blank.
 345          *
 346          * @since 1.22
 347          *
 348          * @param bool $show Set to false to not generate a label.
 349          * @return void
 350          */
 351         public function setShowEmptyLabel( $show ) {
 352                 $this->mShowEmptyLabels = $show;
 353         }
 354
 355         /**
 356          * Can we assume that the request is an attempt to submit a HTMLForm, as opposed to an attempt to
 357          * just view it? This can't normally be distinguished for e.g. checkboxes.
 358          *
 359          * Returns true if the request has a field for a CSRF token (wpEditToken) or a form identifier
 360          * (wpFormIdentifier).
 361          *
 362          * @param WebRequest $request
 363          * @return bool
 364          */
 365         protected function isSubmitAttempt( WebRequest $request ) {
 366                 return $request->getCheck( 'wpEditToken' ) || $request->getCheck( 'wpFormIdentifier' );
 367         }
 368
 369         /**
 370          * Get the value that this input has been set to from a posted form,
 371          * or the input's default value if it has not been set.
 372          *
 373          * @param WebRequest $request
 374          * @return string The value
 375          */
 376         public function loadDataFromRequest( $request ) {
 377                 if ( $request->getCheck( $this->mName ) ) {
 378                         return $request->getText( $this->mName );
 379                 } else {
 380                         return $this->getDefault();
 381                 }
 382         }
 383
 384         /**
 385          * Initialise the object
 386          *
 387          * @param array $params Associative Array. See HTMLForm doc for syntax.
 388          *
 389          * @since 1.22 The 'label' attribute no longer accepts raw HTML, use 'label-raw' instead
 390          * @throws MWException
 391          */
 392         public function __construct( $params ) {
 393                 $this->mParams = $params;
 394
 395                 if ( isset( $params['parent'] ) && $params['parent'] instanceof HTMLForm ) {
 396                         $this->mParent = $params['parent'];
 397                 }
 398
 399                 # Generate the label from a message, if possible
 400                 if ( isset( $params['label-message'] ) ) {
 401                         $this->mLabel = $this->getMessage( $params['label-message'] )->parse();
 402                 } elseif ( isset( $params['label'] ) ) {
 403                         if ( $params['label'] === '&#160;' ) {
 404                                 // Apparently some things set &nbsp directly and in an odd format
 405                                 $this->mLabel = '&#160;';
 406                         } else {
 407                                 $this->mLabel = htmlspecialchars( $params['label'] );
 408                         }
 409                 } elseif ( isset( $params['label-raw'] ) ) {
 410                         $this->mLabel = $params['label-raw'];
 411                 }
 412
 413                 $this->mName = "wp{$params['fieldname']}";
 414                 if ( isset( $params['name'] ) ) {
 415                         $this->mName = $params['name'];
 416                 }
 417
 418                 if ( isset( $params['dir'] ) ) {
 419                         $this->mDir = $params['dir'];
 420                 }
 421
 422                 $validName = urlencode( $this->mName );
 423                 $validName = str_replace( [ '%5B', '%5D' ], [ '[', ']' ], $validName );
 424                 if ( $this->mName != $validName && !isset( $params['nodata'] ) ) {
 425                         throw new MWException( "Invalid name '{$this->mName}' passed to " . __METHOD__ );
 426                 }
 427
 428                 $this->mID = "mw-input-{$this->mName}";
 429
 430                 if ( isset( $params['default'] ) ) {
 431                         $this->mDefault = $params['default'];
 432                 }
 433
 434                 if ( isset( $params['id'] ) ) {
 435                         $id = $params['id'];
 436                         $validId = urlencode( $id );
 437
 438                         if ( $id != $validId ) {
 439                                 throw new MWException( "Invalid id '$id' passed to " . __METHOD__ );
 440                         }
 441
 442                         $this->mID = $id;
 443                 }
 444
 445                 if ( isset( $params['cssclass'] ) ) {
 446                         $this->mClass = $params['cssclass'];
 447                 }
 448
 449                 if ( isset( $params['csshelpclass'] ) ) {
 450                         $this->mHelpClass = $params['csshelpclass'];
 451                 }
 452
 453                 if ( isset( $params['validation-callback'] ) ) {
 454                         $this->mValidationCallback = $params['validation-callback'];
 455                 }
 456
 457                 if ( isset( $params['filter-callback'] ) ) {
 458                         $this->mFilterCallback = $params['filter-callback'];
 459                 }
 460
 461                 if ( isset( $params['hidelabel'] ) ) {
 462                         $this->mShowEmptyLabels = false;
 463                 }
 464
 465                 if ( isset( $params['hide-if'] ) ) {
 466                         $this->mHideIf = $params['hide-if'];
 467                 }
 468         }
 469
 470         /**
 471          * Get the complete table row for the input, including help text,
 472          * labels, and whatever.
 473          *
 474          * @param string $value The value to set the input to.
 475          *
 476          * @return string Complete HTML table row.
 477          */
 478         public function getTableRow( $value ) {
 479                 list( $errors, $errorClass ) = $this->getErrorsAndErrorClass( $value );
 480                 $inputHtml = $this->getInputHTML( $value );
 481                 $fieldType = static::class;
 482                 $helptext = $this->getHelpTextHtmlTable( $this->getHelpText() );
 483                 $cellAttributes = [];
 484                 $rowAttributes = [];
 485                 $rowClasses = '';
 486
 487                 if ( !empty( $this->mParams['vertical-label'] ) ) {
 488                         $cellAttributes['colspan'] = 2;
 489                         $verticalLabel = true;
 490                 } else {
 491                         $verticalLabel = false;
 492                 }
 493
 494                 $label = $this->getLabelHtml( $cellAttributes );
 495
 496                 $field = Html::rawElement(
 497                         'td',
 498                         [ 'class' => 'mw-input' ] + $cellAttributes,
 499                         $inputHtml . "\n$errors"
 500                 );
 501
 502                 if ( $this->mHideIf ) {
 503                         $rowAttributes['data-hide-if'] = FormatJson::encode( $this->mHideIf );
 504                         $rowClasses .= ' mw-htmlform-hide-if';
 505                 }
 506
 507                 if ( $verticalLabel ) {
 508                         $html = Html::rawElement( 'tr',
 509                                 $rowAttributes + [ 'class' => "mw-htmlform-vertical-label $rowClasses" ], $label );
 510                         $html .= Html::rawElement( 'tr',
 511                                 $rowAttributes + [
 512                                         'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass $rowClasses"
 513                                 ],
 514                                 $field );
 515                 } else {
 516                         $html =
 517                                 Html::rawElement( 'tr',
 518                                         $rowAttributes + [
 519                                                 'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass $rowClasses"
 520                                         ],
 521                                         $label . $field );
 522                 }
 523
 524                 return $html . $helptext;
 525         }
 526
 527         /**
 528          * Get the complete div for the input, including help text,
 529          * labels, and whatever.
 530          * @since 1.20
 531          *
 532          * @param string $value The value to set the input to.
 533          *
 534          * @return string Complete HTML table row.
 535          */
 536         public function getDiv( $value ) {
 537                 list( $errors, $errorClass ) = $this->getErrorsAndErrorClass( $value );
 538                 $inputHtml = $this->getInputHTML( $value );
 539                 $fieldType = static::class;
 540                 $helptext = $this->getHelpTextHtmlDiv( $this->getHelpText() );
 541                 $cellAttributes = [];
 542                 $label = $this->getLabelHtml( $cellAttributes );
 543
 544                 $outerDivClass = [
 545                         'mw-input',
 546                         'mw-htmlform-nolabel' => ( $label === '' )
 547                 ];
 548
 549                 $horizontalLabel = $this->mParams['horizontal-label'] ?? false;
 550
 551                 if ( $horizontalLabel ) {
 552                         $field = '&#160;' . $inputHtml . "\n$errors";
 553                 } else {
 554                         $field = Html::rawElement(
 555                                 'div',
 556                                 [ 'class' => $outerDivClass ] + $cellAttributes,
 557                                 $inputHtml . "\n$errors"
 558                         );
 559                 }
 560                 $divCssClasses = [ "mw-htmlform-field-$fieldType",
 561                         $this->mClass, $this->mVFormClass, $errorClass ];
 562
 563                 $wrapperAttributes = [
 564                         'class' => $divCssClasses,
 565                 ];
 566                 if ( $this->mHideIf ) {
 567                         $wrapperAttributes['data-hide-if'] = FormatJson::encode( $this->mHideIf );
 568                         $wrapperAttributes['class'][] = ' mw-htmlform-hide-if';
 569                 }
 570                 $html = Html::rawElement( 'div', $wrapperAttributes, $label . $field );
 571                 $html .= $helptext;
 572
 573                 return $html;
 574         }
 575
 576         /**
 577          * Get the OOUI version of the div. Falls back to getDiv by default.
 578          * @since 1.26
 579          *
 580          * @param string $value The value to set the input to.
 581          *
 582          * @return OOUI\FieldLayout|OOUI\ActionFieldLayout
 583          */
 584         public function getOOUI( $value ) {
 585                 $inputField = $this->getInputOOUI( $value );
 586
 587                 if ( !$inputField ) {
 588                         // This field doesn't have an OOUI implementation yet at all. Fall back to getDiv() to
 589                         // generate the whole field, label and errors and all, then wrap it in a Widget.
 590                         // It might look weird, but it'll work OK.
 591                         return $this->getFieldLayoutOOUI(
 592                                 new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $this->getDiv( $value ) ) ] ),
 593                                 [ 'infusable' => false, 'align' => 'top' ]
 594                         );
 595                 }
 596
 597                 $infusable = true;
 598                 if ( is_string( $inputField ) ) {
 599                         // We have an OOUI implementation, but it's not proper, and we got a load of HTML.
 600                         // Cheat a little and wrap it in a widget. It won't be infusable, though, since client-side
 601                         // JavaScript doesn't know how to rebuilt the contents.
 602                         $inputField = new OOUI\Widget( [ 'content' => new OOUI\HtmlSnippet( $inputField ) ] );
 603                         $infusable = false;
 604                 }
 605
 606                 $fieldType = static::class;
 607                 $help = $this->getHelpText();
 608                 $errors = $this->getErrorsRaw( $value );
 609                 foreach ( $errors as &$error ) {
 610                         $error = new OOUI\HtmlSnippet( $error );
 611                 }
 612
 613                 $notices = $this->getNotices();
 614                 foreach ( $notices as &$notice ) {
 615                         $notice = new OOUI\HtmlSnippet( $notice );
 616                 }
 617
 618                 $config = [
 619                         'classes' => [ "mw-htmlform-field-$fieldType", $this->mClass ],
 620                         'align' => $this->getLabelAlignOOUI(),
 621                         'help' => ( $help !== null && $help !== '' ) ? new OOUI\HtmlSnippet( $help ) : null,
 622                         'errors' => $errors,
 623                         'notices' => $notices,
 624                         'infusable' => $infusable,
 625                 ];
 626
 627                 $preloadModules = false;
 628
 629                 if ( $infusable && $this->shouldInfuseOOUI() ) {
 630                         $preloadModules = true;
 631                         $config['classes'][] = 'mw-htmlform-field-autoinfuse';
 632                 }
 633
 634                 // the element could specify, that the label doesn't need to be added
 635                 $label = $this->getLabel();
 636                 if ( $label && $label !== '&#160;' ) {
 637                         $config['label'] = new OOUI\HtmlSnippet( $label );
 638                 }
 639
 640                 if ( $this->mHideIf ) {
 641                         $preloadModules = true;
 642                         $config['hideIf'] = $this->mHideIf;
 643                 }
 644
 645                 $config['modules'] = $this->getOOUIModules();
 646
 647                 if ( $preloadModules ) {
 648                         $this->mParent->getOutput()->addModules( 'mediawiki.htmlform.ooui' );
 649                         $this->mParent->getOutput()->addModules( $this->getOOUIModules() );
 650                 }
 651
 652                 return $this->getFieldLayoutOOUI( $inputField, $config );
 653         }
 654
 655         /**
 656          * Get label alignment when generating field for OOUI.
 657          * @return string 'left', 'right', 'top' or 'inline'
 658          */
 659         protected function getLabelAlignOOUI() {
 660                 return 'top';
 661         }
 662
 663         /**
 664          * Get a FieldLayout (or subclass thereof) to wrap this field in when using OOUI output.
 665          * @param string $inputField
 666          * @param array $config
 667          * @return OOUI\FieldLayout|OOUI\ActionFieldLayout
 668          */
 669         protected function getFieldLayoutOOUI( $inputField, $config ) {
 670                 if ( isset( $this->mClassWithButton ) ) {
 671                         $buttonWidget = $this->mClassWithButton->getInputOOUI( '' );
 672                         return new HTMLFormActionFieldLayout( $inputField, $buttonWidget, $config );
 673                 }
 674                 return new HTMLFormFieldLayout( $inputField, $config );
 675         }
 676
 677         /**
 678          * Whether the field should be automatically infused. Note that all OOUI HTMLForm fields are
 679          * infusable (you can call OO.ui.infuse() on them), but not all are infused by default, since
 680          * there is no benefit in doing it e.g. for buttons and it's a small performance hit on page load.
 681          *
 682          * @return bool
 683          */
 684         protected function shouldInfuseOOUI() {
 685                 // Always infuse fields with help text, since the interface for it is nicer with JS
 686                 return $this->getHelpText() !== null;
 687         }
 688
 689         /**
 690          * Get the list of extra ResourceLoader modules which must be loaded client-side before it's
 691          * possible to infuse this field's OOUI widget.
 692          *
 693          * @return string[]
 694          */
 695         protected function getOOUIModules() {
 696                 return [];
 697         }
 698
 699         /**
 700          * Get the complete raw fields for the input, including help text,
 701          * labels, and whatever.
 702          * @since 1.20
 703          *
 704          * @param string $value The value to set the input to.
 705          *
 706          * @return string Complete HTML table row.
 707          */
 708         public function getRaw( $value ) {
 709                 list( $errors, ) = $this->getErrorsAndErrorClass( $value );
 710                 $inputHtml = $this->getInputHTML( $value );
 711                 $helptext = $this->getHelpTextHtmlRaw( $this->getHelpText() );
 712                 $cellAttributes = [];
 713                 $label = $this->getLabelHtml( $cellAttributes );
 714
 715                 $html = "\n$errors";
 716                 $html .= $label;
 717                 $html .= $inputHtml;
 718                 $html .= $helptext;
 719
 720                 return $html;
 721         }
 722
 723         /**
 724          * Get the complete field for the input, including help text,
 725          * labels, and whatever. Fall back from 'vform' to 'div' when not overridden.
 726          *
 727          * @since 1.25
 728          * @param string $value The value to set the input to.
 729          * @return string Complete HTML field.
 730          */
 731         public function getVForm( $value ) {
 732                 // Ewwww
 733                 $this->mVFormClass = ' mw-ui-vform-field';
 734                 return $this->getDiv( $value );
 735         }
 736
 737         /**
 738          * Get the complete field as an inline element.
 739          * @since 1.25
 740          * @param string $value The value to set the input to.
 741          * @return string Complete HTML inline element
 742          */
 743         public function getInline( $value ) {
 744                 list( $errors, $errorClass ) = $this->getErrorsAndErrorClass( $value );
 745                 $inputHtml = $this->getInputHTML( $value );
 746                 $helptext = $this->getHelpTextHtmlDiv( $this->getHelpText() );
 747                 $cellAttributes = [];
 748                 $label = $this->getLabelHtml( $cellAttributes );
 749
 750                 $html = "\n" . $errors .
 751                         $label . '&#160;' .
 752                         $inputHtml .
 753                         $helptext;
 754
 755                 return $html;
 756         }
 757
 758         /**
 759          * Generate help text HTML in table format
 760          * @since 1.20
 761          *
 762          * @param string|null $helptext
 763          * @return string
 764          */
 765         public function getHelpTextHtmlTable( $helptext ) {
 766                 if ( is_null( $helptext ) ) {
 767                         return '';
 768                 }
 769
 770                 $rowAttributes = [];
 771                 if ( $this->mHideIf ) {
 772                         $rowAttributes['data-hide-if'] = FormatJson::encode( $this->mHideIf );
 773                         $rowAttributes['class'] = 'mw-htmlform-hide-if';
 774                 }
 775
 776                 $tdClasses = [ 'htmlform-tip' ];
 777                 if ( $this->mHelpClass !== false ) {
 778                         $tdClasses[] = $this->mHelpClass;
 779                 }
 780                 $row = Html::rawElement( 'td', [ 'colspan' => 2, 'class' => $tdClasses ], $helptext );
 781                 $row = Html::rawElement( 'tr', $rowAttributes, $row );
 782
 783                 return $row;
 784         }
 785
 786         /**
 787          * Generate help text HTML in div format
 788          * @since 1.20
 789          *
 790          * @param string|null $helptext
 791          *
 792          * @return string
 793          */
 794         public function getHelpTextHtmlDiv( $helptext ) {
 795                 if ( is_null( $helptext ) ) {
 796                         return '';
 797                 }
 798
 799                 $wrapperAttributes = [
 800                         'class' => 'htmlform-tip',
 801                 ];
 802                 if ( $this->mHelpClass !== false ) {
 803                         $wrapperAttributes['class'] .= " {$this->mHelpClass}";
 804                 }
 805                 if ( $this->mHideIf ) {
 806                         $wrapperAttributes['data-hide-if'] = FormatJson::encode( $this->mHideIf );
 807                         $wrapperAttributes['class'] .= ' mw-htmlform-hide-if';
 808                 }
 809                 $div = Html::rawElement( 'div', $wrapperAttributes, $helptext );
 810
 811                 return $div;
 812         }
 813
 814         /**
 815          * Generate help text HTML formatted for raw output
 816          * @since 1.20
 817          *
 818          * @param string|null $helptext
 819          * @return string
 820          */
 821         public function getHelpTextHtmlRaw( $helptext ) {
 822                 return $this->getHelpTextHtmlDiv( $helptext );
 823         }
 824
 825         /**
 826          * Determine the help text to display
 827          * @since 1.20
 828          * @return string|null HTML
 829          */
 830         public function getHelpText() {
 831                 $helptext = null;
 832
 833                 if ( isset( $this->mParams['help-message'] ) ) {
 834                         $this->mParams['help-messages'] = [ $this->mParams['help-message'] ];
 835                 }
 836
 837                 if ( isset( $this->mParams['help-messages'] ) ) {
 838                         foreach ( $this->mParams['help-messages'] as $msg ) {
 839                                 $msg = $this->getMessage( $msg );
 840
 841                                 if ( $msg->exists() ) {
 842                                         if ( is_null( $helptext ) ) {
 843                                                 $helptext = '';
 844                                         } else {
 845                                                 $helptext .= $this->msg( 'word-separator' )->escaped(); // some space
 846                                         }
 847                                         $helptext .= $msg->parse(); // Append message
 848                                 }
 849                         }
 850                 } elseif ( isset( $this->mParams['help'] ) ) {
 851                         $helptext = $this->mParams['help'];
 852                 }
 853
 854                 return $helptext;
 855         }
 856
 857         /**
 858          * Determine form errors to display and their classes
 859          * @since 1.20
 860          *
 861          * @param string $value The value of the input
 862          * @return array array( $errors, $errorClass )
 863          */
 864         public function getErrorsAndErrorClass( $value ) {
 865                 $errors = $this->validate( $value, $this->mParent->mFieldData );
 866
 867                 if ( is_bool( $errors ) || !$this->mParent->wasSubmitted() ) {
 868                         $errors = '';
 869                         $errorClass = '';
 870                 } else {
 871                         $errors = self::formatErrors( $errors );
 872                         $errorClass = 'mw-htmlform-invalid-input';
 873                 }
 874
 875                 return [ $errors, $errorClass ];
 876         }
 877
 878         /**
 879          * Determine form errors to display, returning them in an array.
 880          *
 881          * @since 1.26
 882          * @param string $value The value of the input
 883          * @return string[] Array of error HTML strings
 884          */
 885         public function getErrorsRaw( $value ) {
 886                 $errors = $this->validate( $value, $this->mParent->mFieldData );
 887
 888                 if ( is_bool( $errors ) || !$this->mParent->wasSubmitted() ) {
 889                         $errors = [];
 890                 }
 891
 892                 if ( !is_array( $errors ) ) {
 893                         $errors = [ $errors ];
 894                 }
 895                 foreach ( $errors as &$error ) {
 896                         if ( $error instanceof Message ) {
 897                                 $error = $error->parse();
 898                         }
 899                 }
 900
 901                 return $errors;
 902         }
 903
 904         /**
 905          * Determine notices to display for the field.
 906          *
 907          * @since 1.28
 908          * @return string[]
 909          */
 910         public function getNotices() {
 911                 $notices = [];
 912
 913                 if ( isset( $this->mParams['notice-message'] ) ) {
 914                         $notices[] = $this->getMessage( $this->mParams['notice-message'] )->parse();
 915                 }
 916
 917                 if ( isset( $this->mParams['notice-messages'] ) ) {
 918                         foreach ( $this->mParams['notice-messages'] as $msg ) {
 919                                 $notices[] = $this->getMessage( $msg )->parse();
 920                         }
 921                 } elseif ( isset( $this->mParams['notice'] ) ) {
 922                         $notices[] = $this->mParams['notice'];
 923                 }
 924
 925                 return $notices;
 926         }
 927
 928         /**
 929          * @return string HTML
 930          */
 931         public function getLabel() {
 932                 return is_null( $this->mLabel ) ? '' : $this->mLabel;
 933         }
 934
 935         public function getLabelHtml( $cellAttributes = [] ) {
 936                 # Don't output a for= attribute for labels with no associated input.
 937                 # Kind of hacky here, possibly we don't want these to be <label>s at all.
 938                 $for = [];
 939
 940                 if ( $this->needsLabel() ) {
 941                         $for['for'] = $this->mID;
 942                 }
 943
 944                 $labelValue = trim( $this->getLabel() );
 945                 $hasLabel = false;
 946                 if ( $labelValue !== '&#160;' && $labelValue !== '' ) {
 947                         $hasLabel = true;
 948                 }
 949
 950                 $displayFormat = $this->mParent->getDisplayFormat();
 951                 $html = '';
 952                 $horizontalLabel = $this->mParams['horizontal-label'] ?? false;
 953
 954                 if ( $displayFormat === 'table' ) {
 955                         $html =
 956                                 Html::rawElement( 'td',
 957                                         [ 'class' => 'mw-label' ] + $cellAttributes,
 958                                         Html::rawElement( 'label', $for, $labelValue ) );
 959                 } elseif ( $hasLabel || $this->mShowEmptyLabels ) {
 960                         if ( $displayFormat === 'div' && !$horizontalLabel ) {
 961                                 $html =
 962                                         Html::rawElement( 'div',
 963                                                 [ 'class' => 'mw-label' ] + $cellAttributes,
 964                                                 Html::rawElement( 'label', $for, $labelValue ) );
 965                         } else {
 966                                 $html = Html::rawElement( 'label', $for, $labelValue );
 967                         }
 968                 }
 969
 970                 return $html;
 971         }
 972
 973         public function getDefault() {
 974                 if ( isset( $this->mDefault ) ) {
 975                         return $this->mDefault;
 976                 } else {
 977                         return null;
 978                 }
 979         }
 980
 981         /**
 982          * Returns the attributes required for the tooltip and accesskey, for Html::element() etc.
 983          *
 984          * @return array Attributes
 985          */
 986         public function getTooltipAndAccessKey() {
 987                 if ( empty( $this->mParams['tooltip'] ) ) {
 988                         return [];
 989                 }
 990
 991                 return Linker::tooltipAndAccesskeyAttribs( $this->mParams['tooltip'] );
 992         }
 993
 994         /**
 995          * Returns the attributes required for the tooltip and accesskey, for OOUI widgets' config.
 996          *
 997          * @return array Attributes
 998          */
 999         public function getTooltipAndAccessKeyOOUI() {
1000                 if ( empty( $this->mParams['tooltip'] ) ) {
1001                         return [];
1002                 }
1003
1004                 return [
1005                         'title' => Linker::titleAttrib( $this->mParams['tooltip'] ),
1006                         'accessKey' => Linker::accesskey( $this->mParams['tooltip'] ),
1007                 ];
1008         }
1009
1010         /**
1011          * Returns the given attributes from the parameters
1012          *
1013          * @param array $list List of attributes to get
1014          * @return array Attributes
1015          */
1016         public function getAttributes( array $list ) {
1017                 static $boolAttribs = [ 'disabled', 'required', 'autofocus', 'multiple', 'readonly' ];
1018
1019                 $ret = [];
1020                 foreach ( $list as $key ) {
1021                         if ( in_array( $key, $boolAttribs ) ) {
1022                                 if ( !empty( $this->mParams[$key] ) ) {
1023                                         $ret[$key] = '';
1024                                 }
1025                         } elseif ( isset( $this->mParams[$key] ) ) {
1026                                 $ret[$key] = $this->mParams[$key];
1027                         }
1028                 }
1029
1030                 return $ret;
1031         }
1032
1033         /**
1034          * Given an array of msg-key => value mappings, returns an array with keys
1035          * being the message texts. It also forces values to strings.
1036          *
1037          * @param array $options
1038          * @return array
1039          */
1040         private function lookupOptionsKeys( $options ) {
1041                 $ret = [];
1042                 foreach ( $options as $key => $value ) {
1043                         $key = $this->msg( $key )->plain();
1044                         $ret[$key] = is_array( $value )
1045                                 ? $this->lookupOptionsKeys( $value )
1046                                 : strval( $value );
1047                 }
1048                 return $ret;
1049         }
1050
1051         /**
1052          * Recursively forces values in an array to strings, because issues arise
1053          * with integer 0 as a value.
1054          *
1055          * @param array $array
1056          * @return array|string
1057          */
1058         public static function forceToStringRecursive( $array ) {
1059                 if ( is_array( $array ) ) {
1060                         return array_map( [ __CLASS__, 'forceToStringRecursive' ], $array );
1061                 } else {
1062                         return strval( $array );
1063                 }
1064         }
1065
1066         /**
1067          * Fetch the array of options from the field's parameters. In order, this
1068          * checks 'options-messages', 'options', then 'options-message'.
1069          *
1070          * @return array|null Options array
1071          */
1072         public function getOptions() {
1073                 if ( $this->mOptions === false ) {
1074                         if ( array_key_exists( 'options-messages', $this->mParams ) ) {
1075                                 $this->mOptions = $this->lookupOptionsKeys( $this->mParams['options-messages'] );
1076                         } elseif ( array_key_exists( 'options', $this->mParams ) ) {
1077                                 $this->mOptionsLabelsNotFromMessage = true;
1078                                 $this->mOptions = self::forceToStringRecursive( $this->mParams['options'] );
1079                         } elseif ( array_key_exists( 'options-message', $this->mParams ) ) {
1080                                 $message = $this->getMessage( $this->mParams['options-message'] )->inContentLanguage()->plain();
1081                                 $this->mOptions = Xml::listDropDownOptions( $message );
1082                         } else {
1083                                 $this->mOptions = null;
1084                         }
1085                 }
1086
1087                 return $this->mOptions;
1088         }
1089
1090         /**
1091          * Get options and make them into arrays suitable for OOUI.
1092          * @return array Options for inclusion in a select or whatever.
1093          */
1094         public function getOptionsOOUI() {
1095                 $oldoptions = $this->getOptions();
1096
1097                 if ( $oldoptions === null ) {
1098                         return null;
1099                 }
1100
1101                 return Xml::listDropDownOptionsOoui( $oldoptions );
1102         }
1103
1104         /**
1105          * flatten an array of options to a single array, for instance,
1106          * a set of "<options>" inside "<optgroups>".
1107          *
1108          * @param array $options Associative Array with values either Strings or Arrays
1109          * @return array Flattened input
1110          */
1111         public static function flattenOptions( $options ) {
1112                 $flatOpts = [];
1113
1114                 foreach ( $options as $value ) {
1115                         if ( is_array( $value ) ) {
1116                                 $flatOpts = array_merge( $flatOpts, self::flattenOptions( $value ) );
1117                         } else {
1118                                 $flatOpts[] = $value;
1119                         }
1120                 }
1121
1122                 return $flatOpts;
1123         }
1124
1125         /**
1126          * Formats one or more errors as accepted by field validation-callback.
1127          *
1128          * @param string|Message|array $errors Array of strings or Message instances
1129          * @return string HTML
1130          * @since 1.18
1131          */
1132         protected static function formatErrors( $errors ) {
1133                 // Note: If you change the logic in this method, change
1134                 // htmlform.Checker.js to match.
1135
1136                 if ( is_array( $errors ) && count( $errors ) === 1 ) {
1137                         $errors = array_shift( $errors );
1138                 }
1139
1140                 if ( is_array( $errors ) ) {
1141                         $lines = [];
1142                         foreach ( $errors as $error ) {
1143                                 if ( $error instanceof Message ) {
1144                                         $lines[] = Html::rawElement( 'li', [], $error->parse() );
1145                                 } else {
1146                                         $lines[] = Html::rawElement( 'li', [], $error );
1147                                 }
1148                         }
1149
1150                         return Html::rawElement( 'ul', [ 'class' => 'error' ], implode( "\n", $lines ) );
1151                 } else {
1152                         if ( $errors instanceof Message ) {
1153                                 $errors = $errors->parse();
1154                         }
1155
1156                         return Html::rawElement( 'span', [ 'class' => 'error' ], $errors );
1157                 }
1158         }
1159
1160         /**
1161          * Turns a *-message parameter (which could be a MessageSpecifier, or a message name, or a
1162          * name + parameters array) into a Message.
1163          * @param mixed $value
1164          * @return Message
1165          */
1166         protected function getMessage( $value ) {
1167                 $message = Message::newFromSpecifier( $value );
1168
1169                 if ( $this->mParent ) {
1170                         $message->setContext( $this->mParent );
1171                 }
1172
1173                 return $message;
1174         }
1175
1176         /**
1177          * Skip this field when collecting data.
1178          * @param WebRequest $request
1179          * @return bool
1180          * @since 1.27
1181          */
1182         public function skipLoadData( $request ) {
1183                 return !empty( $this->mParams['nodata'] );
1184         }
1185
1186         /**
1187          * Whether this field requires the user agent to have JavaScript enabled for the client-side HTML5
1188          * form validation to work correctly.
1189          *
1190          * @return bool
1191          * @since 1.29
1192          */
1193         public function needsJSForHtml5FormValidation() {
1194                 if ( $this->mHideIf ) {
1195                         // This is probably more restrictive than it needs to be, but better safe than sorry
1196                         return true;
1197                 }
1198                 return false;
1199         }
1200 }