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  *                           Overwrites 'help-messages'.
  37  *  'help-messages'       -- array of message key. As above, each item can
  38  *                           be an array of msg key and then parameters.
  39  *                           Overwrites 'help-message'.
  40  *      'required'            -- passed through to the object, indicating that it
  41  *                               is a required field.
  42  *      'size'                -- the length of text fields
  43  *      'filter-callback      -- a function name to give you the chance to
  44  *                               massage the inputted value before it's processed.
  45  *                               @see HTMLForm::filter()
  46  *      'validation-callback' -- a function name to give you the chance
  47  *                               to impose extra validation on the field input.
  48  *                               @see HTMLForm::validate()
  49  *      'name'                -- By default, the 'name' attribute of the input field
  50  *                               is "wp{$fieldname}".  If you want a different name
  51  *                               (eg one without the "wp" prefix), specify it here and
  52  *                               it will be used without modification.
  53  *
  54  * TODO: Document 'section' / 'subsection' stuff
  55  */
  56 class HTMLForm {
  57
  58         # A mapping of 'type' inputs onto standard HTMLFormField subclasses
  59         static $typeMappings = array(
  60                 'text' => 'HTMLTextField',
  61                 'textarea' => 'HTMLTextAreaField',
  62                 'select' => 'HTMLSelectField',
  63                 'radio' => 'HTMLRadioField',
  64                 'multiselect' => 'HTMLMultiSelectField',
  65                 'check' => 'HTMLCheckField',
  66                 'toggle' => 'HTMLCheckField',
  67                 'int' => 'HTMLIntField',
  68                 'float' => 'HTMLFloatField',
  69                 'info' => 'HTMLInfoField',
  70                 'selectorother' => 'HTMLSelectOrOtherField',
  71                 'selectandother' => 'HTMLSelectAndOtherField',
  72                 'submit' => 'HTMLSubmitField',
  73                 'hidden' => 'HTMLHiddenField',
  74                 'edittools' => 'HTMLEditTools',
  75
  76                 # HTMLTextField will output the correct type="" attribute automagically.
  77                 # There are about four zillion other HTML5 input types, like url, but
  78                 # we don't use those at the moment, so no point in adding all of them.
  79                 'email' => 'HTMLTextField',
  80                 'password' => 'HTMLTextField',
  81         );
  82
  83         protected $mMessagePrefix;
  84         protected $mFlatFields;
  85         protected $mFieldTree;
  86         protected $mShowReset = false;
  87         public $mFieldData;
  88
  89         protected $mSubmitCallback;
  90         protected $mValidationErrorMessage;
  91
  92         protected $mPre = '';
  93         protected $mHeader = '';
  94         protected $mFooter = '';
  95         protected $mSectionHeaders = array();
  96         protected $mSectionFooters = array();
  97         protected $mPost = '';
  98         protected $mId;
  99
 100         protected $mSubmitID;
 101         protected $mSubmitName;
 102         protected $mSubmitText;
 103         protected $mSubmitTooltip;
 104
 105         protected $mContext; // <! RequestContext
 106         protected $mTitle;
 107         protected $mMethod = 'post';
 108
 109         protected $mUseMultipart = false;
 110         protected $mHiddenFields = array();
 111         protected $mButtons = array();
 112
 113         protected $mWrapperLegend = false;
 114
 115         /**
 116          * Build a new HTMLForm from an array of field attributes
 117          * @param $descriptor Array of Field constructs, as described above
 118          * @param $context RequestContext available since 1.18, will become compulsory in 1.19.
 119          *     Obviates the need to call $form->setTitle()
 120          * @param $messagePrefix String a prefix to go in front of default messages
 121          */
 122         public function __construct( $descriptor, /*RequestContext*/ $context = null, $messagePrefix = '' ) {
 123                 if( $context instanceof RequestContext ){
 124                         $this->mContext = $context;
 125                         $this->mTitle = false; // We don't need them to set a title
 126                         $this->mMessagePrefix = $messagePrefix;
 127                 } else {
 128                         // B/C since 1.18
 129                         if( is_string( $context ) && $messagePrefix === '' ){
 130                                 // it's actually $messagePrefix
 131                                 $this->mMessagePrefix = $context;
 132                         }
 133                 }
 134
 135                 // Expand out into a tree.
 136                 $loadedDescriptor = array();
 137                 $this->mFlatFields = array();
 138
 139                 foreach ( $descriptor as $fieldname => $info ) {
 140                         $section = isset( $info['section'] )
 141                                 ? $info['section']
 142                                 : '';
 143
 144                         if ( isset( $info['type'] ) && $info['type'] == 'file' ) {
 145                                 $this->mUseMultipart = true;
 146                         }
 147
 148                         $field = self::loadInputFromParameters( $fieldname, $info );
 149                         $field->mParent = $this;
 150
 151                         $setSection =& $loadedDescriptor;
 152                         if ( $section ) {
 153                                 $sectionParts = explode( '/', $section );
 154
 155                                 while ( count( $sectionParts ) ) {
 156                                         $newName = array_shift( $sectionParts );
 157
 158                                         if ( !isset( $setSection[$newName] ) ) {
 159                                                 $setSection[$newName] = array();
 160                                         }
 161
 162                                         $setSection =& $setSection[$newName];
 163                                 }
 164                         }
 165
 166                         $setSection[$fieldname] = $field;
 167                         $this->mFlatFields[$fieldname] = $field;
 168                 }
 169
 170                 $this->mFieldTree = $loadedDescriptor;
 171         }
 172
 173         /**
 174          * Add the HTMLForm-specific JavaScript, if it hasn't been
 175          * done already.
 176          * @deprecated since 1.18 load modules with ResourceLoader instead
 177          */
 178         static function addJS() { }
 179
 180         /**
 181          * Initialise a new Object for the field
 182          * @param $descriptor input Descriptor, as described above
 183          * @return HTMLFormField subclass
 184          */
 185         static function loadInputFromParameters( $fieldname, $descriptor ) {
 186                 if ( isset( $descriptor['class'] ) ) {
 187                         $class = $descriptor['class'];
 188                 } elseif ( isset( $descriptor['type'] ) ) {
 189                         $class = self::$typeMappings[$descriptor['type']];
 190                         $descriptor['class'] = $class;
 191                 } else {
 192                         $class = null;
 193                 }
 194
 195                 if ( !$class ) {
 196                         throw new MWException( "Descriptor with no class: " . print_r( $descriptor, true ) );
 197                 }
 198
 199                 $descriptor['fieldname'] = $fieldname;
 200
 201                 $obj = new $class( $descriptor );
 202
 203                 return $obj;
 204         }
 205
 206         /**
 207          * Prepare form for submission
 208          */
 209         function prepareForm() {
 210                 # Check if we have the info we need
 211                 if ( !$this->mTitle instanceof Title && $this->mTitle !== false ) {
 212                         throw new MWException( "You must call setTitle() on an HTMLForm" );
 213                 }
 214
 215                 # Load data from the request.
 216                 $this->loadData();
 217         }
 218
 219         /**
 220          * Try submitting, with edit token check first
 221          * @return Status|boolean
 222          */
 223         function tryAuthorizedSubmit() {
 224                 $editToken = $this->getRequest()->getVal( 'wpEditToken' );
 225
 226                 $result = false;
 227                 if ( $this->getMethod() != 'post' || $this->getUser()->matchEditToken( $editToken ) ) {
 228                         $result = $this->trySubmit();
 229                 }
 230                 return $result;
 231         }
 232
 233         /**
 234          * The here's-one-I-made-earlier option: do the submission if
 235          * posted, or display the form with or without funky valiation
 236          * errors
 237          * @return Bool or Status whether submission was successful.
 238          */
 239         function show() {
 240                 $this->prepareForm();
 241
 242                 $result = $this->tryAuthorizedSubmit();
 243                 if ( $result === true || ( $result instanceof Status && $result->isGood() ) ){
 244                         return $result;
 245                 }
 246
 247                 $this->displayForm( $result );
 248                 return false;
 249         }
 250
 251         /**
 252          * Validate all the fields, and call the submision callback
 253          * function if everything is kosher.
 254          * @return Mixed Bool true == Successful submission, Bool false
 255          *       == No submission attempted, anything else == Error to
 256          *       display.
 257          */
 258         function trySubmit() {
 259                 # Check for validation
 260                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 261                         if ( !empty( $field->mParams['nodata'] ) ) {
 262                                 continue;
 263                         }
 264                         if ( $field->validate(
 265                                         $this->mFieldData[$fieldname],
 266                                         $this->mFieldData )
 267                                 !== true
 268                         ) {
 269                                 return isset( $this->mValidationErrorMessage )
 270                                         ? $this->mValidationErrorMessage
 271                                         : array( 'htmlform-invalid-input' );
 272                         }
 273                 }
 274
 275                 $callback = $this->mSubmitCallback;
 276
 277                 $data = $this->filterDataForSubmit( $this->mFieldData );
 278
 279                 $res = call_user_func( $callback, $data );
 280
 281                 return $res;
 282         }
 283
 284         /**
 285          * Set a callback to a function to do something with the form
 286          * once it's been successfully validated.
 287          * @param $cb String function name.  The function will be passed
 288          *       the output from HTMLForm::filterDataForSubmit, and must
 289          *       return Bool true on success, Bool false if no submission
 290          *       was attempted, or String HTML output to display on error.
 291          */
 292         function setSubmitCallback( $cb ) {
 293                 $this->mSubmitCallback = $cb;
 294         }
 295
 296         /**
 297          * Set a message to display on a validation error.
 298          * @param $msg Mixed String or Array of valid inputs to wfMsgExt()
 299          *       (so each entry can be either a String or Array)
 300          */
 301         function setValidationErrorMessage( $msg ) {
 302                 $this->mValidationErrorMessage = $msg;
 303         }
 304
 305         /**
 306          * Set the introductory message, overwriting any existing message.
 307          * @param $msg String complete text of message to display
 308          */
 309         function setIntro( $msg ) { $this->mPre = $msg; }
 310
 311         /**
 312          * Add introductory text.
 313          * @param $msg String complete text of message to display
 314          */
 315         function addPreText( $msg ) { $this->mPre .= $msg; }
 316
 317         /**
 318          * Add header text, inside the form.
 319          * @param $msg String complete text of message to display
 320          */
 321         function addHeaderText( $msg, $section = null ) {
 322                 if ( is_null( $section ) ) {
 323                         $this->mHeader .= $msg;
 324                 } else {
 325                         if ( !isset( $this->mSectionHeaders[$section] ) ) {
 326                                 $this->mSectionHeaders[$section] = '';
 327                         }
 328                         $this->mSectionHeaders[$section] .= $msg;
 329                 }
 330         }
 331
 332         /**
 333          * Add footer text, inside the form.
 334          * @param $msg String complete text of message to display
 335          */
 336         function addFooterText( $msg, $section = null ) {
 337                 if ( is_null( $section ) ) {
 338                         $this->mFooter .= $msg;
 339                 } else {
 340                         if ( !isset( $this->mSectionFooters[$section] ) ) {
 341                                 $this->mSectionFooters[$section] = '';
 342                         }
 343                         $this->mSectionFooters[$section] .= $msg;
 344                 }
 345         }
 346
 347         /**
 348          * Add text to the end of the display.
 349          * @param $msg String complete text of message to display
 350          */
 351         function addPostText( $msg ) { $this->mPost .= $msg; }
 352
 353         /**
 354          * Add a hidden field to the output
 355          * @param $name String field name.  This will be used exactly as entered
 356          * @param $value String field value
 357          * @param $attribs Array
 358          */
 359         public function addHiddenField( $name, $value, $attribs = array() ) {
 360                 $attribs += array( 'name' => $name );
 361                 $this->mHiddenFields[] = array( $value, $attribs );
 362         }
 363
 364         public function addButton( $name, $value, $id = null, $attribs = null ) {
 365                 $this->mButtons[] = compact( 'name', 'value', 'id', 'attribs' );
 366         }
 367
 368         /**
 369          * Display the form (sending to wgOut), with an appropriate error
 370          * message or stack of messages, and any validation errors, etc.
 371          * @param $submitResult Mixed output from HTMLForm::trySubmit()
 372          */
 373         function displayForm( $submitResult ) {
 374                 # For good measure (it is the default)
 375                 $this->getOutput()->preventClickjacking();
 376                 $this->getOutput()->addModules( 'mediawiki.htmlform' );
 377
 378                 $html = ''
 379                         . $this->getErrors( $submitResult )
 380                         . $this->mHeader
 381                         . $this->getBody()
 382                         . $this->getHiddenFields()
 383                         . $this->getButtons()
 384                         . $this->mFooter
 385                 ;
 386
 387                 $html = $this->wrapForm( $html );
 388
 389                 $this->getOutput()->addHTML( ''
 390                         . $this->mPre
 391                         . $html
 392                         . $this->mPost
 393                 );
 394         }
 395
 396         /**
 397          * Wrap the form innards in an actual <form> element
 398          * @param $html String HTML contents to wrap.
 399          * @return String wrapped HTML.
 400          */
 401         function wrapForm( $html ) {
 402
 403                 # Include a <fieldset> wrapper for style, if requested.
 404                 if ( $this->mWrapperLegend !== false ) {
 405                         $html = Xml::fieldset( $this->mWrapperLegend, $html );
 406                 }
 407                 # Use multipart/form-data
 408                 $encType = $this->mUseMultipart
 409                         ? 'multipart/form-data'
 410                         : 'application/x-www-form-urlencoded';
 411                 # Attributes
 412                 $attribs = array(
 413                         'action'  => $this->getTitle()->getFullURL(),
 414                         'method'  => $this->mMethod,
 415                         'class'   => 'visualClear',
 416                         'enctype' => $encType,
 417                 );
 418                 if ( !empty( $this->mId ) ) {
 419                         $attribs['id'] = $this->mId;
 420                 }
 421
 422                 return Html::rawElement( 'form', $attribs, $html );
 423         }
 424
 425         /**
 426          * Get the hidden fields that should go inside the form.
 427          * @return String HTML.
 428          */
 429         function getHiddenFields() {
 430                 $html = '';
 431                 if( $this->getMethod() == 'post' ){
 432                         $html .= Html::hidden( 'wpEditToken', $this->getUser()->editToken(), array( 'id' => 'wpEditToken' ) ) . "\n";
 433                         $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
 434                 }
 435
 436                 foreach ( $this->mHiddenFields as $data ) {
 437                         list( $value, $attribs ) = $data;
 438                         $html .= Html::hidden( $attribs['name'], $value, $attribs ) . "\n";
 439                 }
 440
 441                 return $html;
 442         }
 443
 444         /**
 445          * Get the submit and (potentially) reset buttons.
 446          * @return String HTML.
 447          */
 448         function getButtons() {
 449                 $html = '';
 450                 $attribs = array();
 451
 452                 if ( isset( $this->mSubmitID ) ) {
 453                         $attribs['id'] = $this->mSubmitID;
 454                 }
 455
 456                 if ( isset( $this->mSubmitName ) ) {
 457                         $attribs['name'] = $this->mSubmitName;
 458                 }
 459
 460                 if ( isset( $this->mSubmitTooltip ) ) {
 461                         $attribs += Linker::tooltipAndAccessKeyAttribs( $this->mSubmitTooltip );
 462                 }
 463
 464                 $attribs['class'] = 'mw-htmlform-submit';
 465
 466                 $html .= Xml::submitButton( $this->getSubmitText(), $attribs ) . "\n";
 467
 468                 if ( $this->mShowReset ) {
 469                         $html .= Html::element(
 470                                 'input',
 471                                 array(
 472                                         'type' => 'reset',
 473                                         'value' => wfMsg( 'htmlform-reset' )
 474                                 )
 475                         ) . "\n";
 476                 }
 477
 478                 foreach ( $this->mButtons as $button ) {
 479                         $attrs = array(
 480                                 'type'  => 'submit',
 481                                 'name'  => $button['name'],
 482                                 'value' => $button['value']
 483                         );
 484
 485                         if ( $button['attribs'] ) {
 486                                 $attrs += $button['attribs'];
 487                         }
 488
 489                         if ( isset( $button['id'] ) ) {
 490                                 $attrs['id'] = $button['id'];
 491                         }
 492
 493                         $html .= Html::element( 'input', $attrs );
 494                 }
 495
 496                 return $html;
 497         }
 498
 499         /**
 500          * Get the whole body of the form.
 501          */
 502         function getBody() {
 503                 return $this->displaySection( $this->mFieldTree );
 504         }
 505
 506         /**
 507          * Format and display an error message stack.
 508          * @param $errors String|Array|Status
 509          * @return String
 510          */
 511         function getErrors( $errors ) {
 512                 if ( $errors instanceof Status ) {
 513                         if ( $errors->isOK() ) {
 514                                 $errorstr = '';
 515                         } else {
 516                                 $errorstr = $this->getOutput()->parse( $errors->getWikiText() );
 517                         }
 518                 } elseif ( is_array( $errors ) ) {
 519                         $errorstr = $this->formatErrors( $errors );
 520                 } else {
 521                         $errorstr = $errors;
 522                 }
 523
 524                 return $errorstr
 525                         ? Html::rawElement( 'div', array( 'class' => 'error' ), $errorstr )
 526                         : '';
 527         }
 528
 529         /**
 530          * Format a stack of error messages into a single HTML string
 531          * @param $errors Array of message keys/values
 532          * @return String HTML, a <ul> list of errors
 533          */
 534         public static function formatErrors( $errors ) {
 535                 $errorstr = '';
 536
 537                 foreach ( $errors as $error ) {
 538                         if ( is_array( $error ) ) {
 539                                 $msg = array_shift( $error );
 540                         } else {
 541                                 $msg = $error;
 542                                 $error = array();
 543                         }
 544
 545                         $errorstr .= Html::rawElement(
 546                                 'li',
 547                                 array(),
 548                                 wfMsgExt( $msg, array( 'parseinline' ), $error )
 549                         );
 550                 }
 551
 552                 $errorstr = Html::rawElement( 'ul', array(), $errorstr );
 553
 554                 return $errorstr;
 555         }
 556
 557         /**
 558          * Set the text for the submit button
 559          * @param $t String plaintext.
 560          */
 561         function setSubmitText( $t ) {
 562                 $this->mSubmitText = $t;
 563         }
 564
 565         /**
 566          * Get the text for the submit button, either customised or a default.
 567          * @return unknown_type
 568          */
 569         function getSubmitText() {
 570                 return $this->mSubmitText
 571                         ? $this->mSubmitText
 572                         : wfMsg( 'htmlform-submit' );
 573         }
 574
 575         public function setSubmitName( $name ) {
 576                 $this->mSubmitName = $name;
 577         }
 578
 579         public function setSubmitTooltip( $name ) {
 580                 $this->mSubmitTooltip = $name;
 581         }
 582
 583         /**
 584          * Set the id for the submit button.
 585          * @param $t String.
 586          * @todo FIXME: Integrity of $t is *not* validated
 587          */
 588         function setSubmitID( $t ) {
 589                 $this->mSubmitID = $t;
 590         }
 591
 592         public function setId( $id ) {
 593                 $this->mId = $id;
 594         }
 595         /**
 596          * Prompt the whole form to be wrapped in a <fieldset>, with
 597          * this text as its <legend> element.
 598          * @param $legend String HTML to go inside the <legend> element.
 599          *       Will be escaped
 600          */
 601         public function setWrapperLegend( $legend ) { $this->mWrapperLegend = $legend; }
 602
 603         /**
 604          * Set the prefix for various default messages
 605          * TODO: currently only used for the <fieldset> legend on forms
 606          * with multiple sections; should be used elsewhre?
 607          * @param $p String
 608          */
 609         function setMessagePrefix( $p ) {
 610                 $this->mMessagePrefix = $p;
 611         }
 612
 613         /**
 614          * Set the title for form submission
 615          * @param $t Title of page the form is on/should be posted to
 616          */
 617         function setTitle( $t ) {
 618                 $this->mTitle = $t;
 619         }
 620
 621         /**
 622          * Get the title
 623          * @return Title
 624          */
 625         function getTitle() {
 626                 return $this->mTitle === false
 627                         ? $this->getContext()->title
 628                         : $this->mTitle;
 629         }
 630
 631         /**
 632          * @return RequestContext
 633          */
 634         public function getContext(){
 635                 return $this->mContext instanceof RequestContext
 636                         ? $this->mContext
 637                         : RequestContext::getMain();
 638         }
 639
 640         /**
 641          * @return OutputPage
 642          */
 643         public function getOutput(){
 644                 return $this->getContext()->output;
 645         }
 646
 647         /**
 648          * @return WebRequest
 649          */
 650         public function getRequest(){
 651                 return $this->getContext()->request;
 652         }
 653
 654         /**
 655          * @return User
 656          */
 657         public function getUser(){
 658                 return $this->getContext()->user;
 659         }
 660
 661         /**
 662          * Set the method used to submit the form
 663          * @param $method String
 664          */
 665         public function setMethod( $method='post' ){
 666                 $this->mMethod = $method;
 667         }
 668
 669         public function getMethod(){
 670                 return $this->mMethod;
 671         }
 672
 673         /**
 674          * TODO: Document
 675          * @param $fields
 676          */
 677         function displaySection( $fields, $sectionName = '' ) {
 678                 $tableHtml = '';
 679                 $subsectionHtml = '';
 680                 $hasLeftColumn = false;
 681
 682                 foreach ( $fields as $key => $value ) {
 683                         if ( is_object( $value ) ) {
 684                                 $v = empty( $value->mParams['nodata'] )
 685                                         ? $this->mFieldData[$key]
 686                                         : $value->getDefault();
 687                                 $tableHtml .= $value->getTableRow( $v );
 688
 689                                 if ( $value->getLabel() != '&#160;' )
 690                                         $hasLeftColumn = true;
 691                         } elseif ( is_array( $value ) ) {
 692                                 $section = $this->displaySection( $value, $key );
 693                                 $legend = $this->getLegend( $key );
 694                                 if ( isset( $this->mSectionHeaders[$key] ) ) {
 695                                         $section = $this->mSectionHeaders[$key] . $section;
 696                                 }
 697                                 if ( isset( $this->mSectionFooters[$key] ) ) {
 698                                         $section .= $this->mSectionFooters[$key];
 699                                 }
 700                                 $subsectionHtml .= Xml::fieldset( $legend, $section ) . "\n";
 701                         }
 702                 }
 703
 704                 $classes = array();
 705
 706                 if ( !$hasLeftColumn ) { // Avoid strange spacing when no labels exist
 707                         $classes[] = 'mw-htmlform-nolabel';
 708                 }
 709
 710                 $attribs = array(
 711                         'class' => implode( ' ', $classes ),
 712                 );
 713
 714                 if ( $sectionName ) {
 715                         $attribs['id'] = Sanitizer::escapeId( "mw-htmlform-$sectionName" );
 716                 }
 717
 718                 $tableHtml = Html::rawElement( 'table', $attribs,
 719                         Html::rawElement( 'tbody', array(), "\n$tableHtml\n" ) ) . "\n";
 720
 721                 return $subsectionHtml . "\n" . $tableHtml;
 722         }
 723
 724         /**
 725          * Construct the form fields from the Descriptor array
 726          */
 727         function loadData() {
 728                 $fieldData = array();
 729
 730                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 731                         if ( !empty( $field->mParams['nodata'] ) ) {
 732                                 continue;
 733                         } elseif ( !empty( $field->mParams['disabled'] ) ) {
 734                                 $fieldData[$fieldname] = $field->getDefault();
 735                         } else {
 736                                 $fieldData[$fieldname] = $field->loadDataFromRequest( $this->getRequest() );
 737                         }
 738                 }
 739
 740                 # Filter data.
 741                 foreach ( $fieldData as $name => &$value ) {
 742                         $field = $this->mFlatFields[$name];
 743                         $value = $field->filter( $value, $this->mFlatFields );
 744                 }
 745
 746                 $this->mFieldData = $fieldData;
 747         }
 748
 749         /**
 750          * Stop a reset button being shown for this form
 751          * @param $suppressReset Bool set to false to re-enable the
 752          *       button again
 753          */
 754         function suppressReset( $suppressReset = true ) {
 755                 $this->mShowReset = !$suppressReset;
 756         }
 757
 758         /**
 759          * Overload this if you want to apply special filtration routines
 760          * to the form as a whole, after it's submitted but before it's
 761          * processed.
 762          * @param $data
 763          * @return unknown_type
 764          */
 765         function filterDataForSubmit( $data ) {
 766                 return $data;
 767         }
 768
 769         /**
 770          * Get a string to go in the <legend> of a section fieldset.  Override this if you
 771          * want something more complicated
 772          * @param $key String
 773          * @return String
 774          */
 775         public function getLegend( $key ) {
 776                 return wfMsg( "{$this->mMessagePrefix}-$key" );
 777         }
 778 }
 779
 780 /**
 781  * The parent class to generate form fields.  Any field type should
 782  * be a subclass of this.
 783  */
 784 abstract class HTMLFormField {
 785
 786         protected $mValidationCallback;
 787         protected $mFilterCallback;
 788         protected $mName;
 789         public $mParams;
 790         protected $mLabel;      # String label.  Set on construction
 791         protected $mID;
 792         protected $mClass = '';
 793         protected $mDefault;
 794
 795         /**
 796          * @var HTMLForm
 797          */
 798         public $mParent;
 799
 800         /**
 801          * This function must be implemented to return the HTML to generate
 802          * the input object itself.  It should not implement the surrounding
 803          * table cells/rows, or labels/help messages.
 804          * @param $value String the value to set the input to; eg a default
 805          *       text for a text input.
 806          * @return String valid HTML.
 807          */
 808         abstract function getInputHTML( $value );
 809
 810         /**
 811          * Override this function to add specific validation checks on the
 812          * field input.  Don't forget to call parent::validate() to ensure
 813          * that the user-defined callback mValidationCallback is still run
 814          * @param $value String the value the field was submitted with
 815          * @param $alldata Array the data collected from the form
 816          * @return Mixed Bool true on success, or String error to display.
 817          */
 818         function validate( $value, $alldata ) {
 819                 if ( isset( $this->mValidationCallback ) ) {
 820                         return call_user_func( $this->mValidationCallback, $value, $alldata );
 821                 }
 822
 823                 if ( isset( $this->mParams['required'] ) && $value === '' ) {
 824                         return wfMsgExt( 'htmlform-required', 'parseinline' );
 825                 }
 826
 827                 return true;
 828         }
 829
 830         function filter( $value, $alldata ) {
 831                 if ( isset( $this->mFilterCallback ) ) {
 832                         $value = call_user_func( $this->mFilterCallback, $value, $alldata );
 833                 }
 834
 835                 return $value;
 836         }
 837
 838         /**
 839          * Should this field have a label, or is there no input element with the
 840          * appropriate id for the label to point to?
 841          *
 842          * @return bool True to output a label, false to suppress
 843          */
 844         protected function needsLabel() {
 845                 return true;
 846         }
 847
 848         /**
 849          * Get the value that this input has been set to from a posted form,
 850          * or the input's default value if it has not been set.
 851          * @param $request WebRequest
 852          * @return String the value
 853          */
 854         function loadDataFromRequest( $request ) {
 855                 if ( $request->getCheck( $this->mName ) ) {
 856                         return $request->getText( $this->mName );
 857                 } else {
 858                         return $this->getDefault();
 859                 }
 860         }
 861
 862         /**
 863          * Initialise the object
 864          * @param $params Associative Array. See HTMLForm doc for syntax.
 865          */
 866         function __construct( $params ) {
 867                 $this->mParams = $params;
 868
 869                 # Generate the label from a message, if possible
 870                 if ( isset( $params['label-message'] ) ) {
 871                         $msgInfo = $params['label-message'];
 872
 873                         if ( is_array( $msgInfo ) ) {
 874                                 $msg = array_shift( $msgInfo );
 875                         } else {
 876                                 $msg = $msgInfo;
 877                                 $msgInfo = array();
 878                         }
 879
 880                         $this->mLabel = wfMsgExt( $msg, 'parseinline', $msgInfo );
 881                 } elseif ( isset( $params['label'] ) ) {
 882                         $this->mLabel = $params['label'];
 883                 }
 884
 885                 $this->mName = "wp{$params['fieldname']}";
 886                 if ( isset( $params['name'] ) ) {
 887                         $this->mName = $params['name'];
 888                 }
 889
 890                 $validName = Sanitizer::escapeId( $this->mName );
 891                 if ( $this->mName != $validName && !isset( $params['nodata'] ) ) {
 892                         throw new MWException( "Invalid name '{$this->mName}' passed to " . __METHOD__ );
 893                 }
 894
 895                 $this->mID = "mw-input-{$this->mName}";
 896
 897                 if ( isset( $params['default'] ) ) {
 898                         $this->mDefault = $params['default'];
 899                 }
 900
 901                 if ( isset( $params['id'] ) ) {
 902                         $id = $params['id'];
 903                         $validId = Sanitizer::escapeId( $id );
 904
 905                         if ( $id != $validId ) {
 906                                 throw new MWException( "Invalid id '$id' passed to " . __METHOD__ );
 907                         }
 908
 909                         $this->mID = $id;
 910                 }
 911
 912                 if ( isset( $params['cssclass'] ) ) {
 913                         $this->mClass = $params['cssclass'];
 914                 }
 915
 916                 if ( isset( $params['validation-callback'] ) ) {
 917                         $this->mValidationCallback = $params['validation-callback'];
 918                 }
 919
 920                 if ( isset( $params['filter-callback'] ) ) {
 921                         $this->mFilterCallback = $params['filter-callback'];
 922                 }
 923         }
 924
 925         /**
 926          * Get the complete table row for the input, including help text,
 927          * labels, and whatever.
 928          * @param $value String the value to set the input to.
 929          * @return String complete HTML table row.
 930          */
 931         function getTableRow( $value ) {
 932                 # Check for invalid data.
 933
 934                 $errors = $this->validate( $value, $this->mParent->mFieldData );
 935
 936                 $cellAttributes = array();
 937                 $verticalLabel = false;
 938
 939                 if ( !empty($this->mParams['vertical-label']) ) {
 940                         $cellAttributes['colspan'] = 2;
 941                         $verticalLabel = true;
 942                 }
 943
 944                 if ( $errors === true || ( !$this->mParent->getRequest()->wasPosted() && ( $this->mParent->getMethod() == 'post' ) ) ) {
 945                         $errors = '';
 946                         $errorClass = '';
 947                 } else {
 948                         $errors = self::formatErrors( $errors );
 949                         $errorClass = 'mw-htmlform-invalid-input';
 950                 }
 951
 952                 $label = $this->getLabelHtml( $cellAttributes );
 953                 $field = Html::rawElement(
 954                         'td',
 955                         array( 'class' => 'mw-input' ) + $cellAttributes,
 956                         $this->getInputHTML( $value ) . "\n$errors"
 957                 );
 958
 959                 $fieldType = get_class( $this );
 960
 961                 if ( $verticalLabel ) {
 962                         $html = Html::rawElement( 'tr',
 963                                 array( 'class' => 'mw-htmlform-vertical-label' ), $label );
 964                         $html .= Html::rawElement( 'tr',
 965                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass" ),
 966                                 $field );
 967                 } else {
 968                         $html = Html::rawElement( 'tr',
 969                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass" ),
 970                                 $label . $field );
 971                 }
 972
 973                 $helptext = null;
 974
 975                 if ( isset( $this->mParams['help-message'] ) ) {
 976                         $msg = $this->mParams['help-message'];
 977                         $helptext = wfMsgExt( $msg, 'parseinline' );
 978                         if ( wfEmptyMsg( $msg ) ) {
 979                                 # Never mind
 980                                 $helptext = null;
 981                         }
 982                 } elseif ( isset( $this->mParams['help-messages'] ) ) {
 983                         # help-message can be passed a message key (string) or an array containing
 984                         # a message key and additional parameters. This makes it impossible to pass
 985                         # an array of message key
 986                         foreach( $this->mParams['help-messages'] as $msg ) {
 987                                 $candidate = wfMsgExt( $msg, 'parseinline' );
 988                                 if( wfEmptyMsg( $msg ) ) {
 989                                         $candidate = null;
 990                                 }
 991                                 $helptext .= $candidate; // append message
 992                         }
 993                 } elseif ( isset( $this->mParams['help'] ) ) {
 994                         $helptext = $this->mParams['help'];
 995                 }
 996
 997                 if ( !is_null( $helptext ) ) {
 998                         $row = Html::rawElement( 'td', array( 'colspan' => 2, 'class' => 'htmlform-tip' ),
 999                                 $helptext );
1000                         $row = Html::rawElement( 'tr', array(), $row );
1001                         $html .= "$row\n";
1002                 }
1003
1004                 return $html;
1005         }
1006
1007         function getLabel() {
1008                 return $this->mLabel;
1009         }
1010         function getLabelHtml( $cellAttributes = array() ) {
1011                 # Don't output a for= attribute for labels with no associated input.
1012                 # Kind of hacky here, possibly we don't want these to be <label>s at all.
1013                 $for = array();
1014
1015                 if ( $this->needsLabel() ) {
1016                         $for['for'] = $this->mID;
1017                 }
1018
1019                 return Html::rawElement( 'td', array( 'class' => 'mw-label' ) + $cellAttributes,
1020                         Html::rawElement( 'label', $for, $this->getLabel() )
1021                 );
1022         }
1023
1024         function getDefault() {
1025                 if ( isset( $this->mDefault ) ) {
1026                         return $this->mDefault;
1027                 } else {
1028                         return null;
1029                 }
1030         }
1031
1032         /**
1033          * Returns the attributes required for the tooltip and accesskey.
1034          *
1035          * @return array Attributes
1036          */
1037         public function getTooltipAndAccessKey() {
1038                 if ( empty( $this->mParams['tooltip'] ) ) {
1039                         return array();
1040                 }
1041                 return Linker::tooltipAndAccessKeyAttribs( $this->mParams['tooltip'] );
1042         }
1043
1044         /**
1045          * flatten an array of options to a single array, for instance,
1046          * a set of <options> inside <optgroups>.
1047          * @param $options Associative Array with values either Strings
1048          *       or Arrays
1049          * @return Array flattened input
1050          */
1051         public static function flattenOptions( $options ) {
1052                 $flatOpts = array();
1053
1054                 foreach ( $options as $value ) {
1055                         if ( is_array( $value ) ) {
1056                                 $flatOpts = array_merge( $flatOpts, self::flattenOptions( $value ) );
1057                         } else {
1058                                 $flatOpts[] = $value;
1059                         }
1060                 }
1061
1062                 return $flatOpts;
1063         }
1064
1065         /**
1066          * Formats one or more errors as accepted by field validation-callback.
1067          * @param $errors String|Message|Array of strings or Message instances
1068          * @return String html
1069          * @since 1.18
1070          */
1071         protected static function formatErrors( $errors ) {
1072                 if ( is_array( $errors ) && count( $errors ) === 1 ) {
1073                         $errors = array_shift( $errors );
1074                 }
1075
1076                 if ( is_array( $errors ) ) {
1077                         $lines = array();
1078                         foreach ( $errors as $error ) {
1079                                 if ( $error instanceof Message ) {
1080                                         $lines[] = Html::rawElement( 'li', array(), $error->parse() );
1081                                 } else {
1082                                         $lines[] = Html::rawElement( 'li', array(), $error );
1083                                 }
1084                         }
1085                         return Html::rawElement( 'ul', array( 'class' => 'error' ), implode( "\n", $lines ) );
1086                 } else {
1087                         if ( $errors instanceof Message ) {
1088                                 $errors = $errors->parse();
1089                         }
1090                         return Html::rawElement( 'span', array( 'class' => 'error' ), $errors );
1091                 }
1092         }
1093 }
1094
1095 class HTMLTextField extends HTMLFormField {
1096         function getSize() {
1097                 return isset( $this->mParams['size'] )
1098                         ? $this->mParams['size']
1099                         : 45;
1100         }
1101
1102         function getInputHTML( $value ) {
1103                 $attribs = array(
1104                         'id' => $this->mID,
1105                         'name' => $this->mName,
1106                         'size' => $this->getSize(),
1107                         'value' => $value,
1108                 ) + $this->getTooltipAndAccessKey();
1109
1110                 if ( isset( $this->mParams['maxlength'] ) ) {
1111                         $attribs['maxlength'] = $this->mParams['maxlength'];
1112                 }
1113
1114                 if ( !empty( $this->mParams['disabled'] ) ) {
1115                         $attribs['disabled'] = 'disabled';
1116                 }
1117
1118                 # TODO: Enforce pattern, step, required, readonly on the server side as
1119                 # well
1120                 foreach ( array( 'min', 'max', 'pattern', 'title', 'step',
1121                 'placeholder' ) as $param ) {
1122                         if ( isset( $this->mParams[$param] ) ) {
1123                                 $attribs[$param] = $this->mParams[$param];
1124                         }
1125                 }
1126
1127                 foreach ( array( 'required', 'autofocus', 'multiple', 'readonly' ) as $param ) {
1128                         if ( isset( $this->mParams[$param] ) ) {
1129                                 $attribs[$param] = '';
1130                         }
1131                 }
1132
1133                 # Implement tiny differences between some field variants
1134                 # here, rather than creating a new class for each one which
1135                 # is essentially just a clone of this one.
1136                 if ( isset( $this->mParams['type'] ) ) {
1137                         switch ( $this->mParams['type'] ) {
1138                                 case 'email':
1139                                         $attribs['type'] = 'email';
1140                                         break;
1141                                 case 'int':
1142                                         $attribs['type'] = 'number';
1143                                         break;
1144                                 case 'float':
1145                                         $attribs['type'] = 'number';
1146                                         $attribs['step'] = 'any';
1147                                         break;
1148                                 # Pass through
1149                                 case 'password':
1150                                 case 'file':
1151                                         $attribs['type'] = $this->mParams['type'];
1152                                         break;
1153                         }
1154                 }
1155
1156                 return Html::element( 'input', $attribs );
1157         }
1158 }
1159 class HTMLTextAreaField extends HTMLFormField {
1160         function getCols() {
1161                 return isset( $this->mParams['cols'] )
1162                         ? $this->mParams['cols']
1163                         : 80;
1164         }
1165
1166         function getRows() {
1167                 return isset( $this->mParams['rows'] )
1168                         ? $this->mParams['rows']
1169                         : 25;
1170         }
1171
1172         function getInputHTML( $value ) {
1173                 $attribs = array(
1174                         'id' => $this->mID,
1175                         'name' => $this->mName,
1176                         'cols' => $this->getCols(),
1177                         'rows' => $this->getRows(),
1178                 ) + $this->getTooltipAndAccessKey();
1179
1180
1181                 if ( !empty( $this->mParams['disabled'] ) ) {
1182                         $attribs['disabled'] = 'disabled';
1183                 }
1184
1185                 if ( !empty( $this->mParams['readonly'] ) ) {
1186                         $attribs['readonly'] = 'readonly';
1187                 }
1188
1189                 foreach ( array( 'required', 'autofocus' ) as $param ) {
1190                         if ( isset( $this->mParams[$param] ) ) {
1191                                 $attribs[$param] = '';
1192                         }
1193                 }
1194
1195                 return Html::element( 'textarea', $attribs, $value );
1196         }
1197 }
1198
1199 /**
1200  * A field that will contain a numeric value
1201  */
1202 class HTMLFloatField extends HTMLTextField {
1203         function getSize() {
1204                 return isset( $this->mParams['size'] )
1205                         ? $this->mParams['size']
1206                         : 20;
1207         }
1208
1209         function validate( $value, $alldata ) {
1210                 $p = parent::validate( $value, $alldata );
1211
1212                 if ( $p !== true ) {
1213                         return $p;
1214                 }
1215
1216                 $value = trim( $value );
1217
1218                 # http://dev.w3.org/html5/spec/common-microsyntaxes.html#real-numbers
1219                 # with the addition that a leading '+' sign is ok.
1220                 if ( !preg_match( '/^((\+|\-)?\d+(\.\d+)?(E(\+|\-)?\d+)?)?$/i', $value ) ) {
1221                         return wfMsgExt( 'htmlform-float-invalid', 'parse' );
1222                 }
1223
1224                 # The "int" part of these message names is rather confusing.
1225                 # They make equal sense for all numbers.
1226                 if ( isset( $this->mParams['min'] ) ) {
1227                         $min = $this->mParams['min'];
1228
1229                         if ( $min > $value ) {
1230                                 return wfMsgExt( 'htmlform-int-toolow', 'parse', array( $min ) );
1231                         }
1232                 }
1233
1234                 if ( isset( $this->mParams['max'] ) ) {
1235                         $max = $this->mParams['max'];
1236
1237                         if ( $max < $value ) {
1238                                 return wfMsgExt( 'htmlform-int-toohigh', 'parse', array( $max ) );
1239                         }
1240                 }
1241
1242                 return true;
1243         }
1244 }
1245
1246 /**
1247  * A field that must contain a number
1248  */
1249 class HTMLIntField extends HTMLFloatField {
1250         function validate( $value, $alldata ) {
1251                 $p = parent::validate( $value, $alldata );
1252
1253                 if ( $p !== true ) {
1254                         return $p;
1255                 }
1256
1257                 # http://dev.w3.org/html5/spec/common-microsyntaxes.html#signed-integers
1258                 # with the addition that a leading '+' sign is ok. Note that leading zeros
1259                 # are fine, and will be left in the input, which is useful for things like
1260                 # phone numbers when you know that they are integers (the HTML5 type=tel
1261                 # input does not require its value to be numeric).  If you want a tidier
1262                 # value to, eg, save in the DB, clean it up with intval().
1263                 if ( !preg_match( '/^((\+|\-)?\d+)?$/', trim( $value ) )
1264                 ) {
1265                         return wfMsgExt( 'htmlform-int-invalid', 'parse' );
1266                 }
1267
1268                 return true;
1269         }
1270 }
1271
1272 /**
1273  * A checkbox field
1274  */
1275 class HTMLCheckField extends HTMLFormField {
1276         function getInputHTML( $value ) {
1277                 if ( !empty( $this->mParams['invert'] ) ) {
1278                         $value = !$value;
1279                 }
1280
1281                 $attr = $this->getTooltipAndAccessKey();
1282                 $attr['id'] = $this->mID;
1283
1284                 if ( !empty( $this->mParams['disabled'] ) ) {
1285                         $attr['disabled'] = 'disabled';
1286                 }
1287
1288                 return Xml::check( $this->mName, $value, $attr ) . '&#160;' .
1289                         Html::rawElement( 'label', array( 'for' => $this->mID ), $this->mLabel );
1290         }
1291
1292         /**
1293          * For a checkbox, the label goes on the right hand side, and is
1294          * added in getInputHTML(), rather than HTMLFormField::getRow()
1295          */
1296         function getLabel() {
1297                 return '&#160;';
1298         }
1299
1300         /**
1301          * @param  $request WebRequest
1302          * @return String
1303          */
1304         function loadDataFromRequest( $request ) {
1305                 $invert = false;
1306                 if ( isset( $this->mParams['invert'] ) && $this->mParams['invert'] ) {
1307                         $invert = true;
1308                 }
1309
1310                 // GetCheck won't work like we want for checks.
1311                 if ( $request->getCheck( 'wpEditToken' ) || $this->mParent->getMethod() != 'post' ) {
1312                         // XOR has the following truth table, which is what we want
1313                         // INVERT VALUE | OUTPUT
1314                         // true   true  | false
1315                         // false  true  | true
1316                         // false  false | false
1317                         // true   false | true
1318                         return $request->getBool( $this->mName ) xor $invert;
1319                 } else {
1320                         return $this->getDefault();
1321                 }
1322         }
1323 }
1324
1325 /**
1326  * A select dropdown field.  Basically a wrapper for Xmlselect class
1327  */
1328 class HTMLSelectField extends HTMLFormField {
1329         function validate( $value, $alldata ) {
1330                 $p = parent::validate( $value, $alldata );
1331
1332                 if ( $p !== true ) {
1333                         return $p;
1334                 }
1335
1336                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1337
1338                 if ( in_array( $value, $validOptions ) )
1339                         return true;
1340                 else
1341                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1342         }
1343
1344         function getInputHTML( $value ) {
1345                 $select = new XmlSelect( $this->mName, $this->mID, strval( $value ) );
1346
1347                 # If one of the options' 'name' is int(0), it is automatically selected.
1348                 # because PHP sucks and thinks int(0) == 'some string'.
1349                 # Working around this by forcing all of them to strings.
1350                 foreach( $this->mParams['options'] as &$opt ){
1351                         if( is_int( $opt ) ){
1352                                 $opt = strval( $opt );
1353                         }
1354                 }
1355                 unset( $opt ); # PHP keeps $opt around as a reference, which is a bit scary
1356
1357                 if ( !empty( $this->mParams['disabled'] ) ) {
1358                         $select->setAttribute( 'disabled', 'disabled' );
1359                 }
1360
1361                 $select->addOptions( $this->mParams['options'] );
1362
1363                 return $select->getHTML();
1364         }
1365 }
1366
1367 /**
1368  * Select dropdown field, with an additional "other" textbox.
1369  */
1370 class HTMLSelectOrOtherField extends HTMLTextField {
1371         static $jsAdded = false;
1372
1373         function __construct( $params ) {
1374                 if ( !in_array( 'other', $params['options'], true ) ) {
1375                         $params['options'][wfMsg( 'htmlform-selectorother-other' )] = 'other';
1376                 }
1377
1378                 parent::__construct( $params );
1379         }
1380
1381         static function forceToStringRecursive( $array ) {
1382                 if ( is_array( $array ) ) {
1383                         return array_map( array( __CLASS__, 'forceToStringRecursive' ), $array );
1384                 } else {
1385                         return strval( $array );
1386                 }
1387         }
1388
1389         function getInputHTML( $value ) {
1390                 $valInSelect = false;
1391
1392                 if ( $value !== false ) {
1393                         $valInSelect = in_array(
1394                                 $value,
1395                                 HTMLFormField::flattenOptions( $this->mParams['options'] )
1396                         );
1397                 }
1398
1399                 $selected = $valInSelect ? $value : 'other';
1400
1401                 $opts = self::forceToStringRecursive( $this->mParams['options'] );
1402
1403                 $select = new XmlSelect( $this->mName, $this->mID, $selected );
1404                 $select->addOptions( $opts );
1405
1406                 $select->setAttribute( 'class', 'mw-htmlform-select-or-other' );
1407
1408                 $tbAttribs = array( 'id' => $this->mID . '-other', 'size' => $this->getSize() );
1409
1410                 if ( !empty( $this->mParams['disabled'] ) ) {
1411                         $select->setAttribute( 'disabled', 'disabled' );
1412                         $tbAttribs['disabled'] = 'disabled';
1413                 }
1414
1415                 $select = $select->getHTML();
1416
1417                 if ( isset( $this->mParams['maxlength'] ) ) {
1418                         $tbAttribs['maxlength'] = $this->mParams['maxlength'];
1419                 }
1420
1421                 $textbox = Html::input(
1422                         $this->mName . '-other',
1423                         $valInSelect ? '' : $value,
1424                         'text',
1425                         $tbAttribs
1426                 );
1427
1428                 return "$select<br />\n$textbox";
1429         }
1430
1431         /**
1432          * @param  $request WebRequest
1433          * @return String
1434          */
1435         function loadDataFromRequest( $request ) {
1436                 if ( $request->getCheck( $this->mName ) ) {
1437                         $val = $request->getText( $this->mName );
1438
1439                         if ( $val == 'other' ) {
1440                                 $val = $request->getText( $this->mName . '-other' );
1441                         }
1442
1443                         return $val;
1444                 } else {
1445                         return $this->getDefault();
1446                 }
1447         }
1448 }
1449
1450 /**
1451  * Multi-select field
1452  */
1453 class HTMLMultiSelectField extends HTMLFormField {
1454
1455         public function __construct( $params ){
1456                 parent::__construct( $params );
1457                 if( isset( $params['flatlist'] ) ){
1458                         $this->mClass .= ' mw-htmlform-multiselect-flatlist';
1459                 }
1460         }
1461
1462         function validate( $value, $alldata ) {
1463                 $p = parent::validate( $value, $alldata );
1464
1465                 if ( $p !== true ) {
1466                         return $p;
1467                 }
1468
1469                 if ( !is_array( $value ) ) {
1470                         return false;
1471                 }
1472
1473                 # If all options are valid, array_intersect of the valid options
1474                 # and the provided options will return the provided options.
1475                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1476
1477                 $validValues = array_intersect( $value, $validOptions );
1478                 if ( count( $validValues ) == count( $value ) ) {
1479                         return true;
1480                 } else {
1481                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1482                 }
1483         }
1484
1485         function getInputHTML( $value ) {
1486                 $html = $this->formatOptions( $this->mParams['options'], $value );
1487
1488                 return $html;
1489         }
1490
1491         function formatOptions( $options, $value ) {
1492                 $html = '';
1493
1494                 $attribs = array();
1495
1496                 if ( !empty( $this->mParams['disabled'] ) ) {
1497                         $attribs['disabled'] = 'disabled';
1498                 }
1499
1500                 foreach ( $options as $label => $info ) {
1501                         if ( is_array( $info ) ) {
1502                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1503                                 $html .= $this->formatOptions( $info, $value );
1504                         } else {
1505                                 $thisAttribs = array( 'id' => "{$this->mID}-$info", 'value' => $info );
1506
1507                                 $checkbox = Xml::check(
1508                                         $this->mName . '[]',
1509                                         in_array( $info, $value, true ),
1510                                         $attribs + $thisAttribs );
1511                                 $checkbox .= '&#160;' . Html::rawElement( 'label', array( 'for' => "{$this->mID}-$info" ), $label );
1512
1513                                 $html .= ' ' . Html::rawElement( 'div', array( 'class' => 'mw-htmlform-multiselect-item' ), $checkbox );
1514                         }
1515                 }
1516
1517                 return $html;
1518         }
1519
1520         /**
1521          * @param  $request WebRequest
1522          * @return String
1523          */
1524         function loadDataFromRequest( $request ) {
1525                 if ( $this->mParent->getMethod() == 'post' ) {
1526                         if( $request->wasPosted() ){
1527                                 # Checkboxes are just not added to the request arrays if they're not checked,
1528                                 # so it's perfectly possible for there not to be an entry at all
1529                                 return $request->getArray( $this->mName, array() );
1530                         } else {
1531                                 # That's ok, the user has not yet submitted the form, so show the defaults
1532                                 return $this->getDefault();
1533                         }
1534                 } else {
1535                         # This is the impossible case: if we look at $_GET and see no data for our
1536                         # field, is it because the user has not yet submitted the form, or that they
1537                         # have submitted it with all the options unchecked? We will have to assume the
1538                         # latter, which basically means that you can't specify 'positive' defaults
1539                         # for GET forms.
1540                         # @todo FIXME...
1541                         return $request->getArray( $this->mName, array() );
1542                 }
1543         }
1544
1545         function getDefault() {
1546                 if ( isset( $this->mDefault ) ) {
1547                         return $this->mDefault;
1548                 } else {
1549                         return array();
1550                 }
1551         }
1552
1553         protected function needsLabel() {
1554                 return false;
1555         }
1556 }
1557
1558 /**
1559  * Double field with a dropdown list constructed from a system message in the format
1560  *     * Optgroup header
1561  *     ** <option value>|<option name>
1562  *     ** <option value == option name>
1563  *     * New Optgroup header
1564  * Plus a text field underneath for an additional reason.  The 'value' of the field is
1565  * ""<select>: <extra reason>"", or "<extra reason>" if nothing has been selected in the
1566  * select dropdown.
1567  * @todo FIXME: If made 'required', only the text field should be compulsory.
1568  */
1569 class HTMLSelectAndOtherField extends HTMLSelectField {
1570
1571         function __construct( $params ) {
1572                 if ( array_key_exists( 'other', $params ) ) {
1573                 } elseif( array_key_exists( 'other-message', $params ) ){
1574                         $params['other'] = wfMsg( $params['other-message'] );
1575                 } else {
1576                         $params['other'] = wfMsg( 'htmlform-selectorother-other' );
1577                 }
1578
1579                 if ( array_key_exists( 'options', $params ) ) {
1580                         # Options array already specified
1581                 } elseif( array_key_exists( 'options-message', $params ) ){
1582                         # Generate options array from a system message
1583                         $params['options'] = self::parseMessage( wfMsg( $params['options-message'], $params['other'] ) );
1584                 } else {
1585                         # Sulk
1586                         throw new MWException( 'HTMLSelectAndOtherField called without any options' );
1587                 }
1588                 $this->mFlatOptions = self::flattenOptions( $params['options'] );
1589
1590                 parent::__construct( $params );
1591         }
1592
1593         /**
1594          * Build a drop-down box from a textual list.
1595          * @param $string String message text
1596          * @param $otherName String name of "other reason" option
1597          * @return Array
1598          * TODO: this is copied from Xml::listDropDown(), deprecate/avoid duplication?
1599          */
1600         public static function parseMessage( $string, $otherName=null ) {
1601                 if( $otherName === null ){
1602                         $otherName = wfMsg( 'htmlform-selectorother-other' );
1603                 }
1604
1605                 $optgroup = false;
1606                 $options = array( $otherName => 'other' );
1607
1608                 foreach ( explode( "\n", $string ) as $option ) {
1609                         $value = trim( $option );
1610                         if ( $value == '' ) {
1611                                 continue;
1612                         } elseif ( substr( $value, 0, 1) == '*' && substr( $value, 1, 1) != '*' ) {
1613                                 # A new group is starting...
1614                                 $value = trim( substr( $value, 1 ) );
1615                                 $optgroup = $value;
1616                         } elseif ( substr( $value, 0, 2) == '**' ) {
1617                                 # groupmember
1618                                 $opt = trim( substr( $value, 2 ) );
1619                                 $parts = array_map( 'trim', explode( '|', $opt, 2 ) );
1620                                 if( count( $parts ) === 1 ){
1621                                         $parts[1] = $parts[0];
1622                                 }
1623                                 if( $optgroup === false ){
1624                                         $options[$parts[1]] = $parts[0];
1625                                 } else {
1626                                         $options[$optgroup][$parts[1]] = $parts[0];
1627                                 }
1628                         } else {
1629                                 # groupless reason list
1630                                 $optgroup = false;
1631                                 $parts = array_map( 'trim', explode( '|', $option, 2 ) );
1632                                 if( count( $parts ) === 1 ){
1633                                         $parts[1] = $parts[0];
1634                                 }
1635                                 $options[$parts[1]] = $parts[0];
1636                         }
1637                 }
1638
1639                 return $options;
1640         }
1641
1642         function getInputHTML( $value ) {
1643                 $select = parent::getInputHTML( $value[1] );
1644
1645                 $textAttribs = array(
1646                         'id' => $this->mID . '-other',
1647                         'size' => $this->getSize(),
1648                 );
1649
1650                 foreach ( array( 'required', 'autofocus', 'multiple', 'disabled' ) as $param ) {
1651                         if ( isset( $this->mParams[$param] ) ) {
1652                                 $textAttribs[$param] = '';
1653                         }
1654                 }
1655
1656                 $textbox = Html::input(
1657                         $this->mName . '-other',
1658                         $value[2],
1659                         'text',
1660                         $textAttribs
1661                 );
1662
1663                 return "$select<br />\n$textbox";
1664         }
1665
1666         /**
1667          * @param  $request WebRequest
1668          * @return Array( <overall message>, <select value>, <text field value> )
1669          */
1670         function loadDataFromRequest( $request ) {
1671                 if ( $request->getCheck( $this->mName ) ) {
1672
1673                         $list = $request->getText( $this->mName );
1674                         $text = $request->getText( $this->mName . '-other' );
1675
1676                         if ( $list == 'other' ) {
1677                                 $final = $text;
1678                         } elseif( !in_array( $list, $this->mFlatOptions ) ){
1679                                 # User has spoofed the select form to give an option which wasn't
1680                                 # in the original offer.  Sulk...
1681                                 $final = $text;
1682                         } elseif( $text == '' ) {
1683                                 $final = $list;
1684                         } else {
1685                                 $final = $list . wfMsgForContent( 'colon-separator' ) . $text;
1686                         }
1687
1688                 } else {
1689                         $final = $this->getDefault();
1690                         $list = $text = '';
1691                 }
1692                 return array( $final, $list, $text );
1693         }
1694
1695         function getSize() {
1696                 return isset( $this->mParams['size'] )
1697                         ? $this->mParams['size']
1698                         : 45;
1699         }
1700
1701         function validate( $value, $alldata ) {
1702                 # HTMLSelectField forces $value to be one of the options in the select
1703                 # field, which is not useful here.  But we do want the validation further up
1704                 # the chain
1705                 $p = parent::validate( $value[1], $alldata );
1706
1707                 if ( $p !== true ) {
1708                         return $p;
1709                 }
1710
1711                 if( isset( $this->mParams['required'] ) && $value[1] === '' ){
1712                         return wfMsgExt( 'htmlform-required', 'parseinline' );
1713                 }
1714
1715                 return true;
1716         }
1717 }
1718
1719 /**
1720  * Radio checkbox fields.
1721  */
1722 class HTMLRadioField extends HTMLFormField {
1723         function validate( $value, $alldata ) {
1724                 $p = parent::validate( $value, $alldata );
1725
1726                 if ( $p !== true ) {
1727                         return $p;
1728                 }
1729
1730                 if ( !is_string( $value ) && !is_int( $value ) ) {
1731                         return false;
1732                 }
1733
1734                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1735
1736                 if ( in_array( $value, $validOptions ) ) {
1737                         return true;
1738                 } else {
1739                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1740                 }
1741         }
1742
1743         /**
1744          * This returns a block of all the radio options, in one cell.
1745          * @see includes/HTMLFormField#getInputHTML()
1746          */
1747         function getInputHTML( $value ) {
1748                 $html = $this->formatOptions( $this->mParams['options'], $value );
1749
1750                 return $html;
1751         }
1752
1753         function formatOptions( $options, $value ) {
1754                 $html = '';
1755
1756                 $attribs = array();
1757                 if ( !empty( $this->mParams['disabled'] ) ) {
1758                         $attribs['disabled'] = 'disabled';
1759                 }
1760
1761                 # TODO: should this produce an unordered list perhaps?
1762                 foreach ( $options as $label => $info ) {
1763                         if ( is_array( $info ) ) {
1764                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1765                                 $html .= $this->formatOptions( $info, $value );
1766                         } else {
1767                                 $id = Sanitizer::escapeId( $this->mID . "-$info" );
1768                                 $html .= Xml::radio(
1769                                         $this->mName,
1770                                         $info,
1771                                         $info == $value,
1772                                         $attribs + array( 'id' => $id )
1773                                 );
1774                                 $html .= '&#160;' .
1775                                                 Html::rawElement( 'label', array( 'for' => $id ), $label );
1776
1777                                 $html .= "<br />\n";
1778                         }
1779                 }
1780
1781                 return $html;
1782         }
1783
1784         protected function needsLabel() {
1785                 return false;
1786         }
1787 }
1788
1789 /**
1790  * An information field (text blob), not a proper input.
1791  */
1792 class HTMLInfoField extends HTMLFormField {
1793         function __construct( $info ) {
1794                 $info['nodata'] = true;
1795
1796                 parent::__construct( $info );
1797         }
1798
1799         function getInputHTML( $value ) {
1800                 return !empty( $this->mParams['raw'] ) ? $value : htmlspecialchars( $value );
1801         }
1802
1803         function getTableRow( $value ) {
1804                 if ( !empty( $this->mParams['rawrow'] ) ) {
1805                         return $value;
1806                 }
1807
1808                 return parent::getTableRow( $value );
1809         }
1810
1811         protected function needsLabel() {
1812                 return false;
1813         }
1814 }
1815
1816 class HTMLHiddenField extends HTMLFormField {
1817         public function __construct( $params ) {
1818                 parent::__construct( $params );
1819
1820                 # Per HTML5 spec, hidden fields cannot be 'required'
1821                 # http://dev.w3.org/html5/spec/states-of-the-type-attribute.html#hidden-state
1822                 unset( $this->mParams['required'] );
1823         }
1824
1825         public function getTableRow( $value ) {
1826                 $params = array();
1827                 if ( $this->mID ) {
1828                         $params['id'] = $this->mID;
1829                 }
1830
1831                 $this->mParent->addHiddenField(
1832                         $this->mName,
1833                         $this->mDefault,
1834                         $params
1835                 );
1836
1837                 return '';
1838         }
1839
1840         public function getInputHTML( $value ) { return ''; }
1841 }
1842
1843 /**
1844  * Add a submit button inline in the form (as opposed to
1845  * HTMLForm::addButton(), which will add it at the end).
1846  */
1847 class HTMLSubmitField extends HTMLFormField {
1848
1849         function __construct( $info ) {
1850                 $info['nodata'] = true;
1851                 parent::__construct( $info );
1852         }
1853
1854         function getInputHTML( $value ) {
1855                 return Xml::submitButton(
1856                         $value,
1857                         array(
1858                                 'class' => 'mw-htmlform-submit',
1859                                 'name' => $this->mName,
1860                                 'id' => $this->mID,
1861                         )
1862                 );
1863         }
1864
1865         protected function needsLabel() {
1866                 return false;
1867         }
1868
1869         /**
1870          * Button cannot be invalid
1871          */
1872         public function validate( $value, $alldata ){
1873                 return true;
1874         }
1875 }
1876
1877 class HTMLEditTools extends HTMLFormField {
1878         public function getInputHTML( $value ) {
1879                 return '';
1880         }
1881
1882         public function getTableRow( $value ) {
1883                 if ( empty( $this->mParams['message'] ) ) {
1884                         $msg = wfMessage( 'edittools' );
1885                 } else {
1886                         $msg = wfMessage( $this->mParams['message'] );
1887                         if ( $msg->isDisabled() ) {
1888                                 $msg = wfMessage( 'edittools' );
1889                         }
1890                 }
1891                 $msg->inContentLanguage();
1892
1893
1894                 return '<tr><td></td><td class="mw-input">'
1895                         . '<div class="mw-editTools">'
1896                         . $msg->parseAsBlock()
1897                         . "</div></td></tr>\n";
1898         }
1899 }