includes/HTMLForm.php

   1 <?php
   2 /**
   3  * Object handling generic submission, CSRF protection, layout and
   4  * other logic for UI forms. in a reusable manner.
   5  *
   6  * In order to generate the form, the HTMLForm object takes an array
   7  * structure detailing the form fields available. Each element of the
   8  * array is a basic property-list, including the type of field, the
   9  * label it is to be given in the form, callbacks for validation and
  10  * 'filtering', and other pertinent information.
  11  *
  12  * Field types are implemented as subclasses of the generic HTMLFormField
  13  * object, and typically implement at least getInputHTML, which generates
  14  * the HTML for the input field to be placed in the table.
  15  *
  16  * The constructor input is an associative array of $fieldname => $info,
  17  * where $info is an Associative Array with any of the following:
  18  *
  19  *       'class'        -- the subclass of HTMLFormField that will be used
  20  *                                 to create the object.  *NOT* the CSS class!
  21  *       'type'     -- roughly translates into the <select> type attribute.
  22  *                                 if 'class' is not specified, this is used as a map
  23  *                                 through HTMLForm::$typeMappings to get the class name.
  24  *       'default'  -- default value when the form is displayed
  25  *       'id'       -- HTML id attribute
  26  *       'cssclass' -- CSS class
  27  *       'options'  -- varies according to the specific object.
  28  *       'label-message' -- message key for a message to use as the label.
  29  *                                 can be an array of msg key and then parameters to
  30  *                                 the message.
  31  *       'label'        -- alternatively, a raw text message. Overridden by
  32  *                                 label-message
  33  *       'help-message'  -- message key for a message to use as a help text.
  34  *                                 can be an array of msg key and then parameters to
  35  *                                 the message.
  36  *       'required' -- passed through to the object, indicating that it
  37  *                                 is a required field.
  38  *       'size'     -- the length of text fields
  39  *       'filter-callback -- a function name to give you the chance to
  40  *                                 massage the inputted value before it's processed.
  41  *                                 @see HTMLForm::filter()
  42  *       'validation-callback' -- a function name to give you the chance
  43  *                                 to impose extra validation on the field input.
  44  *                                 @see HTMLForm::validate()
  45  *
  46  * TODO: Document 'section' / 'subsection' stuff
  47  */
  48 class HTMLForm {
  49         static $jsAdded = false;
  50
  51         # A mapping of 'type' inputs onto standard HTMLFormField subclasses
  52         static $typeMappings = array(
  53                 'text' => 'HTMLTextField',
  54                 'textarea' => 'HTMLTextAreaField',
  55                 'select' => 'HTMLSelectField',
  56                 'radio' => 'HTMLRadioField',
  57                 'multiselect' => 'HTMLMultiSelectField',
  58                 'check' => 'HTMLCheckField',
  59                 'toggle' => 'HTMLCheckField',
  60                 'int' => 'HTMLIntField',
  61                 'float' => 'HTMLFloatField',
  62                 'info' => 'HTMLInfoField',
  63                 'selectorother' => 'HTMLSelectOrOtherField',
  64                 'submit' => 'HTMLSubmitField',
  65                 'hidden' => 'HTMLHiddenField',
  66                 'edittools' => 'HTMLEditTools',
  67
  68                 # HTMLTextField will output the correct type="" attribute automagically.
  69                 # There are about four zillion other HTML5 input types, like url, but
  70                 # we don't use those at the moment, so no point in adding all of them.
  71                 'email' => 'HTMLTextField',
  72                 'password' => 'HTMLTextField',
  73         );
  74
  75         protected $mMessagePrefix;
  76         protected $mFlatFields;
  77         protected $mFieldTree;
  78         protected $mShowReset = false;
  79         public $mFieldData;
  80
  81         protected $mSubmitCallback;
  82         protected $mValidationErrorMessage;
  83
  84         protected $mPre = '';
  85         protected $mHeader = '';
  86         protected $mFooter = '';
  87         protected $mPost = '';
  88         protected $mId;
  89
  90         protected $mSubmitID;
  91         protected $mSubmitName;
  92         protected $mSubmitText;
  93         protected $mSubmitTooltip;
  94         protected $mTitle;
  95
  96         protected $mUseMultipart = false;
  97         protected $mHiddenFields = array();
  98         protected $mButtons = array();
  99
 100         protected $mWrapperLegend = false;
 101
 102         /**
 103          * Build a new HTMLForm from an array of field attributes
 104          * @param $descriptor Array of Field constructs, as described above
 105          * @param $messagePrefix String a prefix to go in front of default messages
 106          */
 107         public function __construct( $descriptor, $messagePrefix = '' ) {
 108                 $this->mMessagePrefix = $messagePrefix;
 109
 110                 // Expand out into a tree.
 111                 $loadedDescriptor = array();
 112                 $this->mFlatFields = array();
 113
 114                 foreach ( $descriptor as $fieldname => $info ) {
 115                         $section = isset( $info['section'] )
 116                                 ? $info['section']
 117                                 : '';
 118
 119                         $info['name'] = isset( $info['name'] )
 120                                 ? $info['name']
 121                                 : $fieldname;
 122
 123                         if ( isset( $info['type'] ) && $info['type'] == 'file' ) {
 124                                 $this->mUseMultipart = true;
 125                         }
 126
 127                         $field = self::loadInputFromParameters( $info );
 128                         $field->mParent = $this;
 129
 130                         $setSection =& $loadedDescriptor;
 131                         if ( $section ) {
 132                                 $sectionParts = explode( '/', $section );
 133
 134                                 while ( count( $sectionParts ) ) {
 135                                         $newName = array_shift( $sectionParts );
 136
 137                                         if ( !isset( $setSection[$newName] ) ) {
 138                                                 $setSection[$newName] = array();
 139                                         }
 140
 141                                         $setSection =& $setSection[$newName];
 142                                 }
 143                         }
 144
 145                         $setSection[$fieldname] = $field;
 146                         $this->mFlatFields[$fieldname] = $field;
 147                 }
 148
 149                 $this->mFieldTree = $loadedDescriptor;
 150         }
 151
 152         /**
 153          * Add the HTMLForm-specific JavaScript, if it hasn't been
 154          * done already.
 155          */
 156         static function addJS() {
 157                 if ( self::$jsAdded ) return;
 158
 159                 global $wgOut, $wgStylePath;
 160
 161                 $wgOut->addScriptFile( "$wgStylePath/common/htmlform.js" );
 162         }
 163
 164         /**
 165          * Initialise a new Object for the field
 166          * @param $descriptor input Descriptor, as described above
 167          * @return HTMLFormField subclass
 168          */
 169         static function loadInputFromParameters( $descriptor ) {
 170                 if ( isset( $descriptor['class'] ) ) {
 171                         $class = $descriptor['class'];
 172                 } elseif ( isset( $descriptor['type'] ) ) {
 173                         $class = self::$typeMappings[$descriptor['type']];
 174                         $descriptor['class'] = $class;
 175                 }
 176
 177                 if ( !$class ) {
 178                         throw new MWException( "Descriptor with no class: " . print_r( $descriptor, true ) );
 179                 }
 180
 181                 $obj = new $class( $descriptor );
 182
 183                 return $obj;
 184         }
 185
 186         /**
 187          * The here's-one-I-made-earlier option: do the submission if
 188          * posted, or display the form with or without funky valiation
 189          * errors
 190          * @return Bool whether submission was successful.
 191          */
 192         function show() {
 193                 // Check if we have the info we need
 194                 if ( ! $this->mTitle ) {
 195                         throw new MWException( "You must call setTitle() on an HTMLForm" );
 196                 }
 197
 198                 self::addJS();
 199
 200                 # Load data from the request.
 201                 $this->loadData();
 202
 203                 # Try a submission
 204                 global $wgUser, $wgRequest;
 205                 $editToken = $wgRequest->getVal( 'wpEditToken' );
 206
 207                 $result = false;
 208                 if ( $wgUser->matchEditToken( $editToken ) ) {
 209                         $result = $this->trySubmit();
 210                 }
 211
 212                 if ( $result === true ) {
 213                         return $result;
 214                 }
 215
 216                 # Display form.
 217                 $this->displayForm( $result );
 218                 return false;
 219         }
 220
 221         /**
 222          * Validate all the fields, and call the submision callback
 223          * function if everything is kosher.
 224          * @return Mixed Bool true == Successful submission, Bool false
 225          *       == No submission attempted, anything else == Error to
 226          *       display.
 227          */
 228         function trySubmit() {
 229                 # Check for validation
 230                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 231                         if ( !empty( $field->mParams['nodata'] ) ) {
 232                                 continue;
 233                         }
 234                         if ( $field->validate(
 235                                         $this->mFieldData[$fieldname],
 236                                         $this->mFieldData )
 237                                 !== true
 238                         ) {
 239                                 return isset( $this->mValidationErrorMessage )
 240                                         ? $this->mValidationErrorMessage
 241                                         : array( 'htmlform-invalid-input' );
 242                         }
 243                 }
 244
 245                 $callback = $this->mSubmitCallback;
 246
 247                 $data = $this->filterDataForSubmit( $this->mFieldData );
 248
 249                 $res = call_user_func( $callback, $data );
 250
 251                 return $res;
 252         }
 253
 254         /**
 255          * Set a callback to a function to do something with the form
 256          * once it's been successfully validated.
 257          * @param $cb String function name.  The function will be passed
 258          *       the output from HTMLForm::filterDataForSubmit, and must
 259          *       return Bool true on success, Bool false if no submission
 260          *       was attempted, or String HTML output to display on error.
 261          */
 262         function setSubmitCallback( $cb ) {
 263                 $this->mSubmitCallback = $cb;
 264         }
 265
 266         /**
 267          * Set a message to display on a validation error.
 268          * @param $msg Mixed String or Array of valid inputs to wfMsgExt()
 269          *       (so each entry can be either a String or Array)
 270          */
 271         function setValidationErrorMessage( $msg ) {
 272                 $this->mValidationErrorMessage = $msg;
 273         }
 274
 275         /**
 276          * Set the introductory message, overwriting any existing message.
 277          * @param $msg String complete text of message to display
 278          */
 279         function setIntro( $msg ) { $this->mPre = $msg; }
 280
 281         /**
 282          * Add introductory text.
 283          * @param $msg String complete text of message to display
 284          */
 285         function addPreText( $msg ) { $this->mPre .= $msg; }
 286
 287         /**
 288          * Add header text, inside the form.
 289          * @param $msg String complete text of message to display
 290          */
 291         function addHeaderText( $msg ) { $this->mHeader .= $msg; }
 292
 293         /**
 294          * Add footer text, inside the form.
 295          * @param $msg String complete text of message to display
 296          */
 297         function addFooterText( $msg ) { $this->mFooter .= $msg; }
 298
 299         /**
 300          * Add text to the end of the display.
 301          * @param $msg String complete text of message to display
 302          */
 303         function addPostText( $msg ) { $this->mPost .= $msg; }
 304
 305         /**
 306          * Add a hidden field to the output
 307          * @param $name String field name
 308          * @param $value String field value
 309          * @param $attribs Array
 310          */
 311         public function addHiddenField( $name, $value, $attribs = array() ) {
 312                 $attribs += array( 'name' => $name );
 313                 $this->mHiddenFields[] = array( $value, $attribs );
 314         }
 315
 316         public function addButton( $name, $value, $id = null, $attribs = null ) {
 317                 $this->mButtons[] = compact( 'name', 'value', 'id', 'attribs' );
 318         }
 319
 320         /**
 321          * Display the form (sending to wgOut), with an appropriate error
 322          * message or stack of messages, and any validation errors, etc.
 323          * @param $submitResult Mixed output from HTMLForm::trySubmit()
 324          */
 325         function displayForm( $submitResult ) {
 326                 global $wgOut;
 327
 328                 $html = ''
 329                         . $this->getErrors( $submitResult )
 330                         . $this->mHeader
 331                         . $this->getBody()
 332                         . $this->getHiddenFields()
 333                         . $this->getButtons()
 334                         . $this->mFooter
 335                 ;
 336
 337                 $html = $this->wrapForm( $html );
 338
 339                 $wgOut->addHTML( ''
 340                         . $this->mPre
 341                         . $html
 342                         . $this->mPost
 343                 );
 344         }
 345
 346         /**
 347          * Wrap the form innards in an actual <form> element
 348          * @param $html String HTML contents to wrap.
 349          * @return String wrapped HTML.
 350          */
 351         function wrapForm( $html ) {
 352
 353                 # Include a <fieldset> wrapper for style, if requested.
 354                 if ( $this->mWrapperLegend !== false ) {
 355                         $html = Xml::fieldset( $this->mWrapperLegend, $html );
 356                 }
 357                 # Use multipart/form-data
 358                 $encType = $this->mUseMultipart
 359                         ? 'multipart/form-data'
 360                         : 'application/x-www-form-urlencoded';
 361                 # Attributes
 362                 $attribs = array(
 363                         'action'  => $this->getTitle()->getFullURL(),
 364                         'method'  => 'post',
 365                         'class'   => 'visualClear',
 366                         'enctype' => $encType,
 367                 );
 368                 if ( !empty( $this->mId ) ) {
 369                         $attribs['id'] = $this->mId;
 370                 }
 371
 372                 return Html::rawElement( 'form', $attribs, $html );
 373         }
 374
 375         /**
 376          * Get the hidden fields that should go inside the form.
 377          * @return String HTML.
 378          */
 379         function getHiddenFields() {
 380                 global $wgUser;
 381
 382                 $html = '';
 383                 $html .= Html::hidden( 'wpEditToken', $wgUser->editToken(), array( 'id' => 'wpEditToken' ) ) . "\n";
 384                 $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
 385
 386                 foreach ( $this->mHiddenFields as $data ) {
 387                         list( $value, $attribs ) = $data;
 388                         $html .= Html::hidden( $attribs['name'], $value, $attribs ) . "\n";
 389                 }
 390
 391                 return $html;
 392         }
 393
 394         /**
 395          * Get the submit and (potentially) reset buttons.
 396          * @return String HTML.
 397          */
 398         function getButtons() {
 399                 $html = '';
 400                 $attribs = array();
 401
 402                 if ( isset( $this->mSubmitID ) ) {
 403                         $attribs['id'] = $this->mSubmitID;
 404                 }
 405
 406                 if ( isset( $this->mSubmitName ) ) {
 407                         $attribs['name'] = $this->mSubmitName;
 408                 }
 409
 410                 if ( isset( $this->mSubmitTooltip ) ) {
 411                         global $wgUser;
 412                         $attribs += $wgUser->getSkin()->tooltipAndAccessKeyAttribs( $this->mSubmitTooltip );
 413                 }
 414
 415                 $attribs['class'] = 'mw-htmlform-submit';
 416
 417                 $html .= Xml::submitButton( $this->getSubmitText(), $attribs ) . "\n";
 418
 419                 if ( $this->mShowReset ) {
 420                         $html .= Html::element(
 421                                 'input',
 422                                 array(
 423                                         'type' => 'reset',
 424                                         'value' => wfMsg( 'htmlform-reset' )
 425                                 )
 426                         ) . "\n";
 427                 }
 428
 429                 foreach ( $this->mButtons as $button ) {
 430                         $attrs = array(
 431                                 'type'  => 'submit',
 432                                 'name'  => $button['name'],
 433                                 'value' => $button['value']
 434                         );
 435
 436                         if ( $button['attribs'] ) {
 437                                 $attrs += $button['attribs'];
 438                         }
 439
 440                         if ( isset( $button['id'] ) ) {
 441                                 $attrs['id'] = $button['id'];
 442                         }
 443
 444                         $html .= Html::element( 'input', $attrs );
 445                 }
 446
 447                 return $html;
 448         }
 449
 450         /**
 451          * Get the whole body of the form.
 452          */
 453         function getBody() {
 454                 return $this->displaySection( $this->mFieldTree );
 455         }
 456
 457         /**
 458          * Format and display an error message stack.
 459          * @param $errors Mixed String or Array of message keys
 460          * @return String
 461          */
 462         function getErrors( $errors ) {
 463                 if ( is_array( $errors ) ) {
 464                         $errorstr = $this->formatErrors( $errors );
 465                 } else {
 466                         $errorstr = $errors;
 467                 }
 468
 469                 return $errorstr
 470                         ? Html::rawElement( 'div', array( 'class' => 'error' ), $errorstr )
 471                         : '';
 472         }
 473
 474         /**
 475          * Format a stack of error messages into a single HTML string
 476          * @param $errors Array of message keys/values
 477          * @return String HTML, a <ul> list of errors
 478          */
 479         static function formatErrors( $errors ) {
 480                 $errorstr = '';
 481
 482                 foreach ( $errors as $error ) {
 483                         if ( is_array( $error ) ) {
 484                                 $msg = array_shift( $error );
 485                         } else {
 486                                 $msg = $error;
 487                                 $error = array();
 488                         }
 489
 490                         $errorstr .= Html::rawElement(
 491                                 'li',
 492                                 null,
 493                                 wfMsgExt( $msg, array( 'parseinline' ), $error )
 494                         );
 495                 }
 496
 497                 $errorstr = Html::rawElement( 'ul', array(), $errorstr );
 498
 499                 return $errorstr;
 500         }
 501
 502         /**
 503          * Set the text for the submit button
 504          * @param $t String plaintext.
 505          */
 506         function setSubmitText( $t ) {
 507                 $this->mSubmitText = $t;
 508         }
 509
 510         /**
 511          * Get the text for the submit button, either customised or a default.
 512          * @return unknown_type
 513          */
 514         function getSubmitText() {
 515                 return $this->mSubmitText
 516                         ? $this->mSubmitText
 517                         : wfMsg( 'htmlform-submit' );
 518         }
 519
 520         public function setSubmitName( $name ) {
 521                 $this->mSubmitName = $name;
 522         }
 523
 524         public function setSubmitTooltip( $name ) {
 525                 $this->mSubmitTooltip = $name;
 526         }
 527
 528
 529         /**
 530          * Set the id for the submit button.
 531          * @param $t String.  FIXME: Integrity is *not* validated
 532          */
 533         function setSubmitID( $t ) {
 534                 $this->mSubmitID = $t;
 535         }
 536
 537         public function setId( $id ) {
 538                 $this->mId = $id;
 539         }
 540         /**
 541          * Prompt the whole form to be wrapped in a <fieldset>, with
 542          * this text as its <legend> element.
 543          * @param $legend String HTML to go inside the <legend> element.
 544          *       Will be escaped
 545          */
 546         public function setWrapperLegend( $legend ) { $this->mWrapperLegend = $legend; }
 547
 548         /**
 549          * Set the prefix for various default messages
 550          * TODO: currently only used for the <fieldset> legend on forms
 551          * with multiple sections; should be used elsewhre?
 552          * @param $p String
 553          */
 554         function setMessagePrefix( $p ) {
 555                 $this->mMessagePrefix = $p;
 556         }
 557
 558         /**
 559          * Set the title for form submission
 560          * @param $t Title of page the form is on/should be posted to
 561          */
 562         function setTitle( $t ) {
 563                 $this->mTitle = $t;
 564         }
 565
 566         /**
 567          * Get the title
 568          * @return Title
 569          */
 570         function getTitle() {
 571                 return $this->mTitle;
 572         }
 573
 574         /**
 575          * TODO: Document
 576          * @param $fields
 577          */
 578         function displaySection( $fields, $sectionName = '' ) {
 579                 $tableHtml = '';
 580                 $subsectionHtml = '';
 581                 $hasLeftColumn = false;
 582
 583                 foreach ( $fields as $key => $value ) {
 584                         if ( is_object( $value ) ) {
 585                                 $v = empty( $value->mParams['nodata'] )
 586                                         ? $this->mFieldData[$key]
 587                                         : $value->getDefault();
 588                                 $tableHtml .= $value->getTableRow( $v );
 589
 590                                 if ( $value->getLabel() != '&#160;' )
 591                                         $hasLeftColumn = true;
 592                         } elseif ( is_array( $value ) ) {
 593                                 $section = $this->displaySection( $value, $key );
 594                                 $legend = wfMsg( "{$this->mMessagePrefix}-$key" );
 595                                 $subsectionHtml .= Xml::fieldset( $legend, $section ) . "\n";
 596                         }
 597                 }
 598
 599                 $classes = array();
 600
 601                 if ( !$hasLeftColumn ) { // Avoid strange spacing when no labels exist
 602                         $classes[] = 'mw-htmlform-nolabel';
 603                 }
 604
 605                 $attribs = array(
 606                         'class' => implode( ' ', $classes ),
 607                 );
 608
 609                 if ( $sectionName ) {
 610                         $attribs['id'] = Sanitizer::escapeId( "mw-htmlform-$sectionName" );
 611                 }
 612
 613                 $tableHtml = Html::rawElement( 'table', $attribs,
 614                         Html::rawElement( 'tbody', array(), "\n$tableHtml\n" ) ) . "\n";
 615
 616                 return $subsectionHtml . "\n" . $tableHtml;
 617         }
 618
 619         /**
 620          * Construct the form fields from the Descriptor array
 621          */
 622         function loadData() {
 623                 global $wgRequest;
 624
 625                 $fieldData = array();
 626
 627                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 628                         if ( !empty( $field->mParams['nodata'] ) ) {
 629                                 continue;
 630                         } elseif ( !empty( $field->mParams['disabled'] ) ) {
 631                                 $fieldData[$fieldname] = $field->getDefault();
 632                         } else {
 633                                 $fieldData[$fieldname] = $field->loadDataFromRequest( $wgRequest );
 634                         }
 635                 }
 636
 637                 # Filter data.
 638                 foreach ( $fieldData as $name => &$value ) {
 639                         $field = $this->mFlatFields[$name];
 640                         $value = $field->filter( $value, $this->mFlatFields );
 641                 }
 642
 643                 $this->mFieldData = $fieldData;
 644         }
 645
 646         /**
 647          * Stop a reset button being shown for this form
 648          * @param $suppressReset Bool set to false to re-enable the
 649          *       button again
 650          */
 651         function suppressReset( $suppressReset = true ) {
 652                 $this->mShowReset = !$suppressReset;
 653         }
 654
 655         /**
 656          * Overload this if you want to apply special filtration routines
 657          * to the form as a whole, after it's submitted but before it's
 658          * processed.
 659          * @param $data
 660          * @return unknown_type
 661          */
 662         function filterDataForSubmit( $data ) {
 663                 return $data;
 664         }
 665 }
 666
 667 /**
 668  * The parent class to generate form fields.  Any field type should
 669  * be a subclass of this.
 670  */
 671 abstract class HTMLFormField {
 672
 673         protected $mValidationCallback;
 674         protected $mFilterCallback;
 675         protected $mName;
 676         public $mParams;
 677         protected $mLabel;      # String label.  Set on construction
 678         protected $mID;
 679         protected $mClass = '';
 680         protected $mDefault;
 681         public $mParent;
 682
 683         /**
 684          * This function must be implemented to return the HTML to generate
 685          * the input object itself.  It should not implement the surrounding
 686          * table cells/rows, or labels/help messages.
 687          * @param $value String the value to set the input to; eg a default
 688          *       text for a text input.
 689          * @return String valid HTML.
 690          */
 691         abstract function getInputHTML( $value );
 692
 693         /**
 694          * Override this function to add specific validation checks on the
 695          * field input.  Don't forget to call parent::validate() to ensure
 696          * that the user-defined callback mValidationCallback is still run
 697          * @param $value String the value the field was submitted with
 698          * @param $alldata Array the data collected from the form
 699          * @return Mixed Bool true on success, or String error to display.
 700          */
 701         function validate( $value, $alldata ) {
 702                 if ( isset( $this->mValidationCallback ) ) {
 703                         return call_user_func( $this->mValidationCallback, $value, $alldata );
 704                 }
 705
 706                 return true;
 707         }
 708
 709         function filter( $value, $alldata ) {
 710                 if ( isset( $this->mFilterCallback ) ) {
 711                         $value = call_user_func( $this->mFilterCallback, $value, $alldata );
 712                 }
 713
 714                 return $value;
 715         }
 716
 717         /**
 718          * Should this field have a label, or is there no input element with the
 719          * appropriate id for the label to point to?
 720          *
 721          * @return bool True to output a label, false to suppress
 722          */
 723         protected function needsLabel() {
 724                 return true;
 725         }
 726
 727         /**
 728          * Get the value that this input has been set to from a posted form,
 729          * or the input's default value if it has not been set.
 730          * @param $request WebRequest
 731          * @return String the value
 732          */
 733         function loadDataFromRequest( $request ) {
 734                 if ( $request->getCheck( $this->mName ) ) {
 735                         return $request->getText( $this->mName );
 736                 } else {
 737                         return $this->getDefault();
 738                 }
 739         }
 740
 741         /**
 742          * Initialise the object
 743          * @param $params Associative Array. See HTMLForm doc for syntax.
 744          */
 745         function __construct( $params ) {
 746                 $this->mParams = $params;
 747
 748                 # Generate the label from a message, if possible
 749                 if ( isset( $params['label-message'] ) ) {
 750                         $msgInfo = $params['label-message'];
 751
 752                         if ( is_array( $msgInfo ) ) {
 753                                 $msg = array_shift( $msgInfo );
 754                         } else {
 755                                 $msg = $msgInfo;
 756                                 $msgInfo = array();
 757                         }
 758
 759                         $this->mLabel = wfMsgExt( $msg, 'parseinline', $msgInfo );
 760                 } elseif ( isset( $params['label'] ) ) {
 761                         $this->mLabel = $params['label'];
 762                 }
 763
 764                 if ( isset( $params['name'] ) ) {
 765                         $name = $params['name'];
 766                         $validName = Sanitizer::escapeId( $name );
 767
 768                         if ( $name != $validName ) {
 769                                 throw new MWException( "Invalid name '$name' passed to " . __METHOD__ );
 770                         }
 771
 772                         $this->mName = 'wp' . $name;
 773                         $this->mID = 'mw-input-' . $name;
 774                 }
 775
 776                 if ( isset( $params['default'] ) ) {
 777                         $this->mDefault = $params['default'];
 778                 }
 779
 780                 if ( isset( $params['id'] ) ) {
 781                         $id = $params['id'];
 782                         $validId = Sanitizer::escapeId( $id );
 783
 784                         if ( $id != $validId ) {
 785                                 throw new MWException( "Invalid id '$id' passed to " . __METHOD__ );
 786                         }
 787
 788                         $this->mID = $id;
 789                 }
 790
 791                 if ( isset( $params['cssclass'] ) ) {
 792                         $this->mClass = $params['cssclass'];
 793                 }
 794
 795                 if ( isset( $params['validation-callback'] ) ) {
 796                         $this->mValidationCallback = $params['validation-callback'];
 797                 }
 798
 799                 if ( isset( $params['filter-callback'] ) ) {
 800                         $this->mFilterCallback = $params['filter-callback'];
 801                 }
 802         }
 803
 804         /**
 805          * Get the complete table row for the input, including help text,
 806          * labels, and whatever.
 807          * @param $value String the value to set the input to.
 808          * @return String complete HTML table row.
 809          */
 810         function getTableRow( $value ) {
 811                 # Check for invalid data.
 812                 global $wgRequest;
 813
 814                 $errors = $this->validate( $value, $this->mParent->mFieldData );
 815
 816                 $cellAttributes = array();
 817                 $verticalLabel = false;
 818
 819                 if ( !empty($this->mParams['vertical-label']) ) {
 820                         $cellAttributes['colspan'] = 2;
 821                         $verticalLabel = true;
 822                 }
 823
 824                 if ( $errors === true || !$wgRequest->wasPosted() ) {
 825                         $errors = '';
 826                 } else {
 827                         $errors = Html::rawElement( 'span', array( 'class' => 'error' ), $errors );
 828                 }
 829
 830                 $label = $this->getLabelHtml( $cellAttributes );
 831                 $field = Html::rawElement(
 832                         'td',
 833                         array( 'class' => 'mw-input' ) + $cellAttributes,
 834                         $this->getInputHTML( $value ) . "\n$errors"
 835                 );
 836
 837                 $fieldType = get_class( $this );
 838
 839                 if ($verticalLabel) {
 840                         $html = Html::rawElement( 'tr',
 841                                 array( 'class' => 'mw-htmlform-vertical-label' ), $label );
 842                         $html .= Html::rawElement( 'tr',
 843                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass}" ),
 844                                 $field );
 845                 } else {
 846                         $html = Html::rawElement( 'tr',
 847                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass}" ),
 848                                 $label . $field );
 849                 }
 850
 851                 $helptext = null;
 852
 853                 if ( isset( $this->mParams['help-message'] ) ) {
 854                         $msg = $this->mParams['help-message'];
 855                         $helptext = wfMsgExt( $msg, 'parseinline' );
 856                         if ( wfEmptyMsg( $msg, $helptext ) ) {
 857                                 # Never mind
 858                                 $helptext = null;
 859                         }
 860                 } elseif ( isset( $this->mParams['help'] ) ) {
 861                         $helptext = $this->mParams['help'];
 862                 }
 863
 864                 if ( !is_null( $helptext ) ) {
 865                         $row = Html::rawElement( 'td', array( 'colspan' => 2, 'class' => 'htmlform-tip' ),
 866                                 $helptext );
 867                         $row = Html::rawElement( 'tr', array(), $row );
 868                         $html .= "$row\n";
 869                 }
 870
 871                 return $html;
 872         }
 873
 874         function getLabel() {
 875                 return $this->mLabel;
 876         }
 877         function getLabelHtml( $cellAttributes = array() ) {
 878                 # Don't output a for= attribute for labels with no associated input.
 879                 # Kind of hacky here, possibly we don't want these to be <label>s at all.
 880                 $for = array();
 881
 882                 if ( $this->needsLabel() ) {
 883                         $for['for'] = $this->mID;
 884                 }
 885
 886                 return Html::rawElement( 'td', array( 'class' => 'mw-label' ) + $cellAttributes,
 887                         Html::rawElement( 'label', $for, $this->getLabel() )
 888                 );
 889         }
 890
 891         function getDefault() {
 892                 if ( isset( $this->mDefault ) ) {
 893                         return $this->mDefault;
 894                 } else {
 895                         return null;
 896                 }
 897         }
 898
 899         /**
 900          * Returns the attributes required for the tooltip and accesskey.
 901          *
 902          * @return array Attributes
 903          */
 904         public function getTooltipAndAccessKey() {
 905                 if ( empty( $this->mParams['tooltip'] ) ) {
 906                         return array();
 907                 }
 908
 909                 global $wgUser;
 910
 911                 return $wgUser->getSkin()->tooltipAndAccessKeyAttribs();
 912         }
 913
 914         /**
 915          * flatten an array of options to a single array, for instance,
 916          * a set of <options> inside <optgroups>.
 917          * @param $options Associative Array with values either Strings
 918          *       or Arrays
 919          * @return Array flattened input
 920          */
 921         public static function flattenOptions( $options ) {
 922                 $flatOpts = array();
 923
 924                 foreach ( $options as $key => $value ) {
 925                         if ( is_array( $value ) ) {
 926                                 $flatOpts = array_merge( $flatOpts, self::flattenOptions( $value ) );
 927                         } else {
 928                                 $flatOpts[] = $value;
 929                         }
 930                 }
 931
 932                 return $flatOpts;
 933         }
 934 }
 935
 936 class HTMLTextField extends HTMLFormField {
 937         function getSize() {
 938                 return isset( $this->mParams['size'] )
 939                         ? $this->mParams['size']
 940                         : 45;
 941         }
 942
 943         function getInputHTML( $value ) {
 944                 $attribs = array(
 945                         'id' => $this->mID,
 946                         'name' => $this->mName,
 947                         'size' => $this->getSize(),
 948                         'value' => $value,
 949                 ) + $this->getTooltipAndAccessKey();
 950
 951                 if ( isset( $this->mParams['maxlength'] ) ) {
 952                         $attribs['maxlength'] = $this->mParams['maxlength'];
 953                 }
 954
 955                 if ( !empty( $this->mParams['disabled'] ) ) {
 956                         $attribs['disabled'] = 'disabled';
 957                 }
 958
 959                 # TODO: Enforce pattern, step, required, readonly on the server side as
 960                 # well
 961                 foreach ( array( 'min', 'max', 'pattern', 'title', 'step',
 962                 'placeholder' ) as $param ) {
 963                         if ( isset( $this->mParams[$param] ) ) {
 964                                 $attribs[$param] = $this->mParams[$param];
 965                         }
 966                 }
 967
 968                 foreach ( array( 'required', 'autofocus', 'multiple', 'readonly' ) as $param ) {
 969                         if ( isset( $this->mParams[$param] ) ) {
 970                                 $attribs[$param] = '';
 971                         }
 972                 }
 973
 974                 # Implement tiny differences between some field variants
 975                 # here, rather than creating a new class for each one which
 976                 # is essentially just a clone of this one.
 977                 if ( isset( $this->mParams['type'] ) ) {
 978                         switch ( $this->mParams['type'] ) {
 979                                 case 'email':
 980                                         $attribs['type'] = 'email';
 981                                         break;
 982                                 case 'int':
 983                                         $attribs['type'] = 'number';
 984                                         break;
 985                                 case 'float':
 986                                         $attribs['type'] = 'number';
 987                                         $attribs['step'] = 'any';
 988                                         break;
 989                                 # Pass through
 990                                 case 'password':
 991                                 case 'file':
 992                                         $attribs['type'] = $this->mParams['type'];
 993                                         break;
 994                         }
 995                 }
 996
 997                 return Html::element( 'input', $attribs );
 998         }
 999
1000         public function validate( $value, $alldata ) {
1001                 $p = parent::validate( $value, $alldata );
1002
1003                 if ( $p !== true ) {
1004                         return $p;
1005                 }
1006
1007                 if ( isset( $this->mParams['required'] ) && $value === '' ) {
1008                         return wfMsgExt( 'htmlform-required', 'parseinline' );
1009                 }
1010
1011                 return true;
1012         }
1013 }
1014 class HTMLTextAreaField extends HTMLFormField {
1015         function getCols() {
1016                 return isset( $this->mParams['cols'] )
1017                         ? $this->mParams['cols']
1018                         : 80;
1019         }
1020
1021         function getRows() {
1022                 return isset( $this->mParams['rows'] )
1023                         ? $this->mParams['rows']
1024                         : 25;
1025         }
1026
1027         function getInputHTML( $value ) {
1028                 $attribs = array(
1029                         'id' => $this->mID,
1030                         'name' => $this->mName,
1031                         'cols' => $this->getCols(),
1032                         'rows' => $this->getRows(),
1033                 ) + $this->getTooltipAndAccessKey();
1034
1035
1036                 if ( !empty( $this->mParams['disabled'] ) ) {
1037                         $attribs['disabled'] = 'disabled';
1038                 }
1039
1040                 if ( !empty( $this->mParams['readonly'] ) ) {
1041                         $attribs['readonly'] = 'readonly';
1042                 }
1043
1044                 foreach ( array( 'required', 'autofocus' ) as $param ) {
1045                         if ( isset( $this->mParams[$param] ) ) {
1046                                 $attribs[$param] = '';
1047                         }
1048                 }
1049
1050                 return Html::element( 'textarea', $attribs, $value );
1051         }
1052
1053         public function validate( $value, $alldata ) {
1054                 $p = parent::validate( $value, $alldata );
1055
1056                 if ( $p !== true ) {
1057                         return $p;
1058                 }
1059
1060                 if ( isset( $this->mParams['required'] ) && $value === '' ) {
1061                         return wfMsgExt( 'htmlform-required', 'parseinline' );
1062                 }
1063
1064                 return true;
1065         }
1066 }
1067
1068 /**
1069  * A field that will contain a numeric value
1070  */
1071 class HTMLFloatField extends HTMLTextField {
1072         function getSize() {
1073                 return isset( $this->mParams['size'] )
1074                         ? $this->mParams['size']
1075                         : 20;
1076         }
1077
1078         function validate( $value, $alldata ) {
1079                 $p = parent::validate( $value, $alldata );
1080
1081                 if ( $p !== true ) {
1082                         return $p;
1083                 }
1084
1085                 if ( floatval( $value ) != $value ) {
1086                         return wfMsgExt( 'htmlform-float-invalid', 'parse' );
1087                 }
1088
1089                 $in_range = true;
1090
1091                 # The "int" part of these message names is rather confusing.
1092                 # They make equal sense for all numbers.
1093                 if ( isset( $this->mParams['min'] ) ) {
1094                         $min = $this->mParams['min'];
1095
1096                         if ( $min > $value ) {
1097                                 return wfMsgExt( 'htmlform-int-toolow', 'parse', array( $min ) );
1098                         }
1099                 }
1100
1101                 if ( isset( $this->mParams['max'] ) ) {
1102                         $max = $this->mParams['max'];
1103
1104                         if ( $max < $value ) {
1105                                 return wfMsgExt( 'htmlform-int-toohigh', 'parse', array( $max ) );
1106                         }
1107                 }
1108
1109                 return true;
1110         }
1111 }
1112
1113 /**
1114  * A field that must contain a number
1115  */
1116 class HTMLIntField extends HTMLFloatField {
1117         function validate( $value, $alldata ) {
1118                 $p = parent::validate( $value, $alldata );
1119
1120                 if ( $p !== true ) {
1121                         return $p;
1122                 }
1123
1124                 if ( $value !== ''
1125                         && ( !is_numeric( $value ) || round( $value ) != $value )
1126                 ) {
1127                         return wfMsgExt( 'htmlform-int-invalid', 'parse' );
1128                 }
1129
1130                 return true;
1131         }
1132 }
1133
1134 /**
1135  * A checkbox field
1136  */
1137 class HTMLCheckField extends HTMLFormField {
1138         function getInputHTML( $value ) {
1139                 if ( !empty( $this->mParams['invert'] ) ) {
1140                         $value = !$value;
1141                 }
1142
1143                 $attr = $this->getTooltipAndAccessKey();
1144                 $attr['id'] = $this->mID;
1145
1146                 if ( !empty( $this->mParams['disabled'] ) ) {
1147                         $attr['disabled'] = 'disabled';
1148                 }
1149
1150                 return Xml::check( $this->mName, $value, $attr ) . '&#160;' .
1151                         Html::rawElement( 'label', array( 'for' => $this->mID ), $this->mLabel );
1152         }
1153
1154         /**
1155          * For a checkbox, the label goes on the right hand side, and is
1156          * added in getInputHTML(), rather than HTMLFormField::getRow()
1157          */
1158         function getLabel() {
1159                 return '&#160;';
1160         }
1161
1162         function loadDataFromRequest( $request ) {
1163                 $invert = false;
1164                 if ( isset( $this->mParams['invert'] ) && $this->mParams['invert'] ) {
1165                         $invert = true;
1166                 }
1167
1168                 // GetCheck won't work like we want for checks.
1169                 if ( $request->getCheck( 'wpEditToken' ) ) {
1170                         // XOR has the following truth table, which is what we want
1171                         // INVERT VALUE | OUTPUT
1172                         // true   true  | false
1173                         // false  true  | true
1174                         // false  false | false
1175                         // true   false | true
1176                         return $request->getBool( $this->mName ) xor $invert;
1177                 } else {
1178                         return $this->getDefault();
1179                 }
1180         }
1181 }
1182
1183 /**
1184  * A select dropdown field.  Basically a wrapper for Xmlselect class
1185  */
1186 class HTMLSelectField extends HTMLFormField {
1187         function validate( $value, $alldata ) {
1188                 $p = parent::validate( $value, $alldata );
1189
1190                 if ( $p !== true ) {
1191                         return $p;
1192                 }
1193
1194                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1195
1196                 if ( in_array( $value, $validOptions ) )
1197                         return true;
1198                 else
1199                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1200         }
1201
1202         function getInputHTML( $value ) {
1203                 $select = new XmlSelect( $this->mName, $this->mID, strval( $value ) );
1204
1205                 # If one of the options' 'name' is int(0), it is automatically selected.
1206                 # because PHP sucks and things int(0) == 'some string'.
1207                 # Working around this by forcing all of them to strings.
1208                 $options = array_map( 'strval', $this->mParams['options'] );
1209
1210                 if ( !empty( $this->mParams['disabled'] ) ) {
1211                         $select->setAttribute( 'disabled', 'disabled' );
1212                 }
1213
1214                 $select->addOptions( $options );
1215
1216                 return $select->getHTML();
1217         }
1218 }
1219
1220 /**
1221  * Select dropdown field, with an additional "other" textbox.
1222  */
1223 class HTMLSelectOrOtherField extends HTMLTextField {
1224         static $jsAdded = false;
1225
1226         function __construct( $params ) {
1227                 if ( !in_array( 'other', $params['options'], true ) ) {
1228                         $params['options'][wfMsg( 'htmlform-selectorother-other' )] = 'other';
1229                 }
1230
1231                 parent::__construct( $params );
1232         }
1233
1234         static function forceToStringRecursive( $array ) {
1235                 if ( is_array( $array ) ) {
1236                         return array_map( array( __CLASS__, 'forceToStringRecursive' ), $array );
1237                 } else {
1238                         return strval( $array );
1239                 }
1240         }
1241
1242         function getInputHTML( $value ) {
1243                 $valInSelect = false;
1244
1245                 if ( $value !== false ) {
1246                         $valInSelect = in_array(
1247                                 $value,
1248                                 HTMLFormField::flattenOptions( $this->mParams['options'] )
1249                         );
1250                 }
1251
1252                 $selected = $valInSelect ? $value : 'other';
1253
1254                 $opts = self::forceToStringRecursive( $this->mParams['options'] );
1255
1256                 $select = new XmlSelect( $this->mName, $this->mID, $selected );
1257                 $select->addOptions( $opts );
1258
1259                 $select->setAttribute( 'class', 'mw-htmlform-select-or-other' );
1260
1261                 $tbAttribs = array( 'id' => $this->mID . '-other', 'size' => $this->getSize() );
1262
1263                 if ( !empty( $this->mParams['disabled'] ) ) {
1264                         $select->setAttribute( 'disabled', 'disabled' );
1265                         $tbAttribs['disabled'] = 'disabled';
1266                 }
1267
1268                 $select = $select->getHTML();
1269
1270                 if ( isset( $this->mParams['maxlength'] ) ) {
1271                         $tbAttribs['maxlength'] = $this->mParams['maxlength'];
1272                 }
1273
1274                 $textbox = Html::input(
1275                         $this->mName . '-other',
1276                         $valInSelect ? '' : $value,
1277                         'text',
1278                         $tbAttribs
1279                 );
1280
1281                 return "$select<br />\n$textbox";
1282         }
1283
1284         function loadDataFromRequest( $request ) {
1285                 if ( $request->getCheck( $this->mName ) ) {
1286                         $val = $request->getText( $this->mName );
1287
1288                         if ( $val == 'other' ) {
1289                                 $val = $request->getText( $this->mName . '-other' );
1290                         }
1291
1292                         return $val;
1293                 } else {
1294                         return $this->getDefault();
1295                 }
1296         }
1297 }
1298
1299 /**
1300  * Multi-select field
1301  */
1302 class HTMLMultiSelectField extends HTMLFormField {
1303         function validate( $value, $alldata ) {
1304                 $p = parent::validate( $value, $alldata );
1305
1306                 if ( $p !== true ) {
1307                         return $p;
1308                 }
1309
1310                 if ( !is_array( $value ) ) {
1311                         return false;
1312                 }
1313
1314                 # If all options are valid, array_intersect of the valid options
1315                 # and the provided options will return the provided options.
1316                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1317
1318                 $validValues = array_intersect( $value, $validOptions );
1319                 if ( count( $validValues ) == count( $value ) ) {
1320                         return true;
1321                 } else {
1322                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1323                 }
1324         }
1325
1326         function getInputHTML( $value ) {
1327                 $html = $this->formatOptions( $this->mParams['options'], $value );
1328
1329                 return $html;
1330         }
1331
1332         function formatOptions( $options, $value ) {
1333                 $html = '';
1334
1335                 $attribs = array();
1336
1337                 if ( !empty( $this->mParams['disabled'] ) ) {
1338                         $attribs['disabled'] = 'disabled';
1339                 }
1340
1341                 foreach ( $options as $label => $info ) {
1342                         if ( is_array( $info ) ) {
1343                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1344                                 $html .= $this->formatOptions( $info, $value );
1345                         } else {
1346                                 $thisAttribs = array( 'id' => $this->mID . "-$info", 'value' => $info );
1347
1348                                 $checkbox = Xml::check( $this->mName . '[]', in_array( $info, $value, true ),
1349                                                                 $attribs + $thisAttribs );
1350                                 $checkbox .= '&#160;' . Html::rawElement( 'label', array( 'for' => $this->mID . "-$info" ), $label );
1351
1352                                 $html .= $checkbox . '<br />';
1353                         }
1354                 }
1355
1356                 return $html;
1357         }
1358
1359         function loadDataFromRequest( $request ) {
1360                 # won't work with getCheck
1361                 if ( $request->getCheck( 'wpEditToken' ) ) {
1362                         $arr = $request->getArray( $this->mName );
1363
1364                         if ( !$arr ) {
1365                                 $arr = array();
1366                         }
1367
1368                         return $arr;
1369                 } else {
1370                         return $this->getDefault();
1371                 }
1372         }
1373
1374         function getDefault() {
1375                 if ( isset( $this->mDefault ) ) {
1376                         return $this->mDefault;
1377                 } else {
1378                         return array();
1379                 }
1380         }
1381
1382         protected function needsLabel() {
1383                 return false;
1384         }
1385 }
1386
1387 /**
1388  * Radio checkbox fields.
1389  */
1390 class HTMLRadioField extends HTMLFormField {
1391         function validate( $value, $alldata ) {
1392                 $p = parent::validate( $value, $alldata );
1393
1394                 if ( $p !== true ) {
1395                         return $p;
1396                 }
1397
1398                 if ( !is_string( $value ) && !is_int( $value ) ) {
1399                         return false;
1400                 }
1401
1402                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1403
1404                 if ( in_array( $value, $validOptions ) ) {
1405                         return true;
1406                 } else {
1407                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1408                 }
1409         }
1410
1411         /**
1412          * This returns a block of all the radio options, in one cell.
1413          * @see includes/HTMLFormField#getInputHTML()
1414          */
1415         function getInputHTML( $value ) {
1416                 $html = $this->formatOptions( $this->mParams['options'], $value );
1417
1418                 return $html;
1419         }
1420
1421         function formatOptions( $options, $value ) {
1422                 $html = '';
1423
1424                 $attribs = array();
1425                 if ( !empty( $this->mParams['disabled'] ) ) {
1426                         $attribs['disabled'] = 'disabled';
1427                 }
1428
1429                 # TODO: should this produce an unordered list perhaps?
1430                 foreach ( $options as $label => $info ) {
1431                         if ( is_array( $info ) ) {
1432                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1433                                 $html .= $this->formatOptions( $info, $value );
1434                         } else {
1435                                 $id = Sanitizer::escapeId( $this->mID . "-$info" );
1436                                 $html .= Xml::radio(
1437                                         $this->mName,
1438                                         $info,
1439                                         $info == $value,
1440                                         $attribs + array( 'id' => $id )
1441                                 );
1442                                 $html .= '&#160;' .
1443                                                 Html::rawElement( 'label', array( 'for' => $id ), $label );
1444
1445                                 $html .= "<br />\n";
1446                         }
1447                 }
1448
1449                 return $html;
1450         }
1451
1452         protected function needsLabel() {
1453                 return false;
1454         }
1455 }
1456
1457 /**
1458  * An information field (text blob), not a proper input.
1459  */
1460 class HTMLInfoField extends HTMLFormField {
1461         function __construct( $info ) {
1462                 $info['nodata'] = true;
1463
1464                 parent::__construct( $info );
1465         }
1466
1467         function getInputHTML( $value ) {
1468                 return !empty( $this->mParams['raw'] ) ? $value : htmlspecialchars( $value );
1469         }
1470
1471         function getTableRow( $value ) {
1472                 if ( !empty( $this->mParams['rawrow'] ) ) {
1473                         return $value;
1474                 }
1475
1476                 return parent::getTableRow( $value );
1477         }
1478
1479         protected function needsLabel() {
1480                 return false;
1481         }
1482 }
1483
1484 class HTMLHiddenField extends HTMLFormField {
1485         public function __construct( $params ) {
1486                 parent::__construct( $params );
1487                 # forcing the 'wp' prefix on hidden field names
1488                 # is undesirable
1489                 $this->mName = substr( $this->mName, 2 );
1490         }
1491
1492         public function getTableRow( $value ) {
1493                 $params = array();
1494                 if ( $this->mID ) {
1495                         $params['id'] = $this->mID;
1496                 }
1497
1498                 $this->mParent->addHiddenField(
1499                         $this->mName,
1500                         $this->mDefault,
1501                         $params
1502                 );
1503
1504                 return '';
1505         }
1506
1507         public function getInputHTML( $value ) { return ''; }
1508 }
1509
1510 /**
1511  * Add a submit button inline in the form (as opposed to
1512  * HTMLForm::addButton(), which will add it at the end).
1513  */
1514 class HTMLSubmitField extends HTMLFormField {
1515
1516         function __construct( $info ) {
1517                 $info['nodata'] = true;
1518                 parent::__construct( $info );
1519         }
1520
1521         function getInputHTML( $value ) {
1522                 return Xml::submitButton(
1523                         $value,
1524                         array(
1525                                 'class' => 'mw-htmlform-submit',
1526                                 'name' => $this->mName,
1527                                 'id' => $this->mID,
1528                         )
1529                 );
1530         }
1531
1532         protected function needsLabel() {
1533                 return false;
1534         }
1535 }
1536
1537 class HTMLEditTools extends HTMLFormField {
1538         public function getInputHTML( $value ) {
1539                 return '';
1540         }
1541
1542         public function getTableRow( $value ) {
1543                 return "<tr><td></td><td class=\"mw-input\">"
1544                         . '<div class="mw-editTools">'
1545                         . wfMsgExt( empty( $this->mParams['message'] )
1546                                 ? 'edittools' : $this->mParams['message'],
1547                                 array( 'parse', 'content' ) )
1548                         . "</div></td></tr>\n";
1549         }
1550 }