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