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 text for a message to use as a help text.
  34  *      'help-message'        -- message key for a message to use as a help text.
  35  *                               can be an array of msg key and then parameters to
  36  *                               the message.
  37  *                               Overwrites 'help-messages' and 'help'.
  38  *      'help-messages'       -- array of message key. As above, each item can
  39  *                               be an array of msg key and then parameters.
  40  *                               Overwrites 'help'.
  41  *      'required'            -- passed through to the object, indicating that it
  42  *                               is a required field.
  43  *      'size'                -- the length of text fields
  44  *      'filter-callback      -- a function name to give you the chance to
  45  *                               massage the inputted value before it's processed.
  46  *                               @see HTMLForm::filter()
  47  *      'validation-callback' -- a function name to give you the chance
  48  *                               to impose extra validation on the field input.
  49  *                               @see HTMLForm::validate()
  50  *      'name'                -- By default, the 'name' attribute of the input field
  51  *                               is "wp{$fieldname}".  If you want a different name
  52  *                               (eg one without the "wp" prefix), specify it here and
  53  *                               it will be used without modification.
  54  *
  55  * TODO: Document 'section' / 'subsection' stuff
  56  */
  57 class HTMLForm extends ContextSource {
  58
  59         // A mapping of 'type' inputs onto standard HTMLFormField subclasses
  60         static $typeMappings = array(
  61                 'text' => 'HTMLTextField',
  62                 'textarea' => 'HTMLTextAreaField',
  63                 'select' => 'HTMLSelectField',
  64                 'radio' => 'HTMLRadioField',
  65                 'multiselect' => 'HTMLMultiSelectField',
  66                 'check' => 'HTMLCheckField',
  67                 'toggle' => 'HTMLCheckField',
  68                 'int' => 'HTMLIntField',
  69                 'float' => 'HTMLFloatField',
  70                 'info' => 'HTMLInfoField',
  71                 'selectorother' => 'HTMLSelectOrOtherField',
  72                 'selectandother' => 'HTMLSelectAndOtherField',
  73                 'submit' => 'HTMLSubmitField',
  74                 'hidden' => 'HTMLHiddenField',
  75                 'edittools' => 'HTMLEditTools',
  76
  77                 // HTMLTextField will output the correct type="" attribute automagically.
  78                 // There are about four zillion other HTML5 input types, like url, but
  79                 // we don't use those at the moment, so no point in adding all of them.
  80                 'email' => 'HTMLTextField',
  81                 'password' => 'HTMLTextField',
  82         );
  83
  84         protected $mMessagePrefix;
  85
  86         /** @var HTMLFormField[] */
  87         protected $mFlatFields;
  88
  89         protected $mFieldTree;
  90         protected $mShowReset = false;
  91         public $mFieldData;
  92
  93         protected $mSubmitCallback;
  94         protected $mValidationErrorMessage;
  95
  96         protected $mPre = '';
  97         protected $mHeader = '';
  98         protected $mFooter = '';
  99         protected $mSectionHeaders = array();
 100         protected $mSectionFooters = array();
 101         protected $mPost = '';
 102         protected $mId;
 103
 104         protected $mSubmitID;
 105         protected $mSubmitName;
 106         protected $mSubmitText;
 107         protected $mSubmitTooltip;
 108
 109         protected $mTitle;
 110         protected $mMethod = 'post';
 111
 112         /**
 113          * Form action URL. false means we will use the URL to set Title
 114          * @since 1.19
 115          * @var bool|string
 116          */
 117         protected $mAction = false;
 118
 119         protected $mUseMultipart = false;
 120         protected $mHiddenFields = array();
 121         protected $mButtons = array();
 122
 123         protected $mWrapperLegend = false;
 124
 125         /**
 126          * If true, sections that contain both fields and subsections will
 127          * render their subsections before their fields.
 128          *
 129          * Subclasses may set this to false to render subsections after fields
 130          * instead.
 131          */
 132         protected $mSubSectionBeforeFields = true;
 133
 134         /**
 135          * Build a new HTMLForm from an array of field attributes
 136          * @param $descriptor Array of Field constructs, as described above
 137          * @param $context IContextSource available since 1.18, will become compulsory in 1.18.
 138          *     Obviates the need to call $form->setTitle()
 139          * @param $messagePrefix String a prefix to go in front of default messages
 140          */
 141         public function __construct( $descriptor, /*IContextSource*/ $context = null, $messagePrefix = '' ) {
 142                 if( $context instanceof IContextSource ){
 143                         $this->setContext( $context );
 144                         $this->mTitle = false; // We don't need them to set a title
 145                         $this->mMessagePrefix = $messagePrefix;
 146                 } else {
 147                         // B/C since 1.18
 148                         if( is_string( $context ) && $messagePrefix === '' ){
 149                                 // it's actually $messagePrefix
 150                                 $this->mMessagePrefix = $context;
 151                         }
 152                 }
 153
 154                 // Expand out into a tree.
 155                 $loadedDescriptor = array();
 156                 $this->mFlatFields = array();
 157
 158                 foreach ( $descriptor as $fieldname => $info ) {
 159                         $section = isset( $info['section'] )
 160                                 ? $info['section']
 161                                 : '';
 162
 163                         if ( isset( $info['type'] ) && $info['type'] == 'file' ) {
 164                                 $this->mUseMultipart = true;
 165                         }
 166
 167                         $field = self::loadInputFromParameters( $fieldname, $info );
 168                         $field->mParent = $this;
 169
 170                         $setSection =& $loadedDescriptor;
 171                         if ( $section ) {
 172                                 $sectionParts = explode( '/', $section );
 173
 174                                 while ( count( $sectionParts ) ) {
 175                                         $newName = array_shift( $sectionParts );
 176
 177                                         if ( !isset( $setSection[$newName] ) ) {
 178                                                 $setSection[$newName] = array();
 179                                         }
 180
 181                                         $setSection =& $setSection[$newName];
 182                                 }
 183                         }
 184
 185                         $setSection[$fieldname] = $field;
 186                         $this->mFlatFields[$fieldname] = $field;
 187                 }
 188
 189                 $this->mFieldTree = $loadedDescriptor;
 190         }
 191
 192         /**
 193          * Add the HTMLForm-specific JavaScript, if it hasn't been
 194          * done already.
 195          * @deprecated since 1.18 load modules with ResourceLoader instead
 196          */
 197         static function addJS() { wfDeprecated( __METHOD__, '1.18' ); }
 198
 199         /**
 200          * Initialise a new Object for the field
 201          * @param $fieldname string
 202          * @param $descriptor string input Descriptor, as described above
 203          * @return HTMLFormField subclass
 204          */
 205         static function loadInputFromParameters( $fieldname, $descriptor ) {
 206                 if ( isset( $descriptor['class'] ) ) {
 207                         $class = $descriptor['class'];
 208                 } elseif ( isset( $descriptor['type'] ) ) {
 209                         $class = self::$typeMappings[$descriptor['type']];
 210                         $descriptor['class'] = $class;
 211                 } else {
 212                         $class = null;
 213                 }
 214
 215                 if ( !$class ) {
 216                         throw new MWException( "Descriptor with no class: " . print_r( $descriptor, true ) );
 217                 }
 218
 219                 $descriptor['fieldname'] = $fieldname;
 220
 221                 # TODO
 222                 # This will throw a fatal error whenever someone try to use
 223                 # 'class' to feed a CSS class instead of 'cssclass'. Would be
 224                 # great to avoid the fatal error and show a nice error.
 225                 $obj = new $class( $descriptor );
 226
 227                 return $obj;
 228         }
 229
 230         /**
 231          * Prepare form for submission
 232          */
 233         function prepareForm() {
 234                 # Check if we have the info we need
 235                 if ( !$this->mTitle instanceof Title && $this->mTitle !== false ) {
 236                         throw new MWException( "You must call setTitle() on an HTMLForm" );
 237                 }
 238
 239                 # Load data from the request.
 240                 $this->loadData();
 241         }
 242
 243         /**
 244          * Try submitting, with edit token check first
 245          * @return Status|boolean
 246          */
 247         function tryAuthorizedSubmit() {
 248                 $result = false;
 249
 250                 $submit = false;
 251                 if ( $this->getMethod() != 'post' ) {
 252                         $submit = true; // no session check needed
 253                 } elseif ( $this->getRequest()->wasPosted() ) {
 254                         $editToken = $this->getRequest()->getVal( 'wpEditToken' );
 255                         if ( $this->getUser()->isLoggedIn() || $editToken != null ) {
 256                                 // Session tokens for logged-out users have no security value.
 257                                 // However, if the user gave one, check it in order to give a nice
 258                                 // "session expired" error instead of "permission denied" or such.
 259                                 $submit = $this->getUser()->matchEditToken( $editToken );
 260                         } else {
 261                                 $submit = true;
 262                         }
 263                 }
 264
 265                 if ( $submit ) {
 266                         $result = $this->trySubmit();
 267                 }
 268
 269                 return $result;
 270         }
 271
 272         /**
 273          * The here's-one-I-made-earlier option: do the submission if
 274          * posted, or display the form with or without funky validation
 275          * errors
 276          * @return Bool or Status whether submission was successful.
 277          */
 278         function show() {
 279                 $this->prepareForm();
 280
 281                 $result = $this->tryAuthorizedSubmit();
 282                 if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
 283                         return $result;
 284                 }
 285
 286                 $this->displayForm( $result );
 287                 return false;
 288         }
 289
 290         /**
 291          * Validate all the fields, and call the submision callback
 292          * function if everything is kosher.
 293          * @return Mixed Bool true == Successful submission, Bool false
 294          *       == No submission attempted, anything else == Error to
 295          *       display.
 296          */
 297         function trySubmit() {
 298                 # Check for validation
 299                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 300                         if ( !empty( $field->mParams['nodata'] ) ) {
 301                                 continue;
 302                         }
 303                         if ( $field->validate(
 304                                         $this->mFieldData[$fieldname],
 305                                         $this->mFieldData )
 306                                 !== true
 307                         ) {
 308                                 return isset( $this->mValidationErrorMessage )
 309                                         ? $this->mValidationErrorMessage
 310                                         : array( 'htmlform-invalid-input' );
 311                         }
 312                 }
 313
 314                 $callback = $this->mSubmitCallback;
 315
 316                 $data = $this->filterDataForSubmit( $this->mFieldData );
 317
 318                 $res = call_user_func( $callback, $data, $this );
 319
 320                 return $res;
 321         }
 322
 323         /**
 324          * Set a callback to a function to do something with the form
 325          * once it's been successfully validated.
 326          * @param $cb String function name.  The function will be passed
 327          *       the output from HTMLForm::filterDataForSubmit, and must
 328          *       return Bool true on success, Bool false if no submission
 329          *       was attempted, or String HTML output to display on error.
 330          */
 331         function setSubmitCallback( $cb ) {
 332                 $this->mSubmitCallback = $cb;
 333         }
 334
 335         /**
 336          * Set a message to display on a validation error.
 337          * @param $msg Mixed String or Array of valid inputs to wfMsgExt()
 338          *       (so each entry can be either a String or Array)
 339          */
 340         function setValidationErrorMessage( $msg ) {
 341                 $this->mValidationErrorMessage = $msg;
 342         }
 343
 344         /**
 345          * Set the introductory message, overwriting any existing message.
 346          * @param $msg String complete text of message to display
 347          */
 348         function setIntro( $msg ) {
 349                 $this->setPreText( $msg );
 350         }
 351
 352         /**
 353          * Set the introductory message, overwriting any existing message.
 354          * @since 1.19
 355          * @param $msg String complete text of message to display
 356          */
 357         function setPreText( $msg ) { $this->mPre = $msg; }
 358
 359         /**
 360          * Add introductory text.
 361          * @param $msg String complete text of message to display
 362          */
 363         function addPreText( $msg ) { $this->mPre .= $msg; }
 364
 365         /**
 366          * Add header text, inside the form.
 367          * @param $msg String complete text of message to display
 368          * @param $section string The section to add the header to
 369          */
 370         function addHeaderText( $msg, $section = null ) {
 371                 if ( is_null( $section ) ) {
 372                         $this->mHeader .= $msg;
 373                 } else {
 374                         if ( !isset( $this->mSectionHeaders[$section] ) ) {
 375                                 $this->mSectionHeaders[$section] = '';
 376                         }
 377                         $this->mSectionHeaders[$section] .= $msg;
 378                 }
 379         }
 380
 381         /**
 382          * Set header text, inside the form.
 383          * @since 1.19
 384          * @param $msg String complete text of message to display
 385          * @param $section The section to add the header to
 386          */
 387         function setHeaderText( $msg, $section = null ) {
 388                 if ( is_null( $section ) ) {
 389                         $this->mHeader = $msg;
 390                 } else {
 391                         $this->mSectionHeaders[$section] = $msg;
 392                 }
 393         }
 394
 395         /**
 396          * Add footer text, inside the form.
 397          * @param $msg String complete text of message to display
 398          * @param $section string The section to add the footer text to
 399          */
 400         function addFooterText( $msg, $section = null ) {
 401                 if ( is_null( $section ) ) {
 402                         $this->mFooter .= $msg;
 403                 } else {
 404                         if ( !isset( $this->mSectionFooters[$section] ) ) {
 405                                 $this->mSectionFooters[$section] = '';
 406                         }
 407                         $this->mSectionFooters[$section] .= $msg;
 408                 }
 409         }
 410
 411         /**
 412          * Set footer text, inside the form.
 413          * @since 1.19
 414          * @param $msg String complete text of message to display
 415          * @param $section string The section to add the footer text to
 416          */
 417         function setFooterText( $msg, $section = null ) {
 418                 if ( is_null( $section ) ) {
 419                         $this->mFooter = $msg;
 420                 } else {
 421                         $this->mSectionFooters[$section] = $msg;
 422                 }
 423         }
 424
 425         /**
 426          * Add text to the end of the display.
 427          * @param $msg String complete text of message to display
 428          */
 429         function addPostText( $msg ) { $this->mPost .= $msg; }
 430
 431         /**
 432          * Set text at the end of the display.
 433          * @param $msg String complete text of message to display
 434          */
 435         function setPostText( $msg ) { $this->mPost = $msg; }
 436
 437         /**
 438          * Add a hidden field to the output
 439          * @param $name String field name.  This will be used exactly as entered
 440          * @param $value String field value
 441          * @param $attribs Array
 442          */
 443         public function addHiddenField( $name, $value, $attribs = array() ) {
 444                 $attribs += array( 'name' => $name );
 445                 $this->mHiddenFields[] = array( $value, $attribs );
 446         }
 447
 448         public function addButton( $name, $value, $id = null, $attribs = null ) {
 449                 $this->mButtons[] = compact( 'name', 'value', 'id', 'attribs' );
 450         }
 451
 452         /**
 453          * Display the form (sending to $wgOut), with an appropriate error
 454          * message or stack of messages, and any validation errors, etc.
 455          * @param $submitResult Mixed output from HTMLForm::trySubmit()
 456          */
 457         function displayForm( $submitResult ) {
 458                 $this->getOutput()->addHTML( $this->getHTML( $submitResult ) );
 459         }
 460
 461         /**
 462          * Returns the raw HTML generated by the form
 463          * @param $submitResult Mixed output from HTMLForm::trySubmit()
 464          * @return string
 465          */
 466         function getHTML( $submitResult ) {
 467                 # For good measure (it is the default)
 468                 $this->getOutput()->preventClickjacking();
 469                 $this->getOutput()->addModules( 'mediawiki.htmlform' );
 470
 471                 $html = ''
 472                         . $this->getErrors( $submitResult )
 473                         . $this->mHeader
 474                         . $this->getBody()
 475                         . $this->getHiddenFields()
 476                         . $this->getButtons()
 477                         . $this->mFooter
 478                 ;
 479
 480                 $html = $this->wrapForm( $html );
 481
 482                 return '' . $this->mPre . $html . $this->mPost;
 483         }
 484
 485         /**
 486          * Wrap the form innards in an actual <form> element
 487          * @param $html String HTML contents to wrap.
 488          * @return String wrapped HTML.
 489          */
 490         function wrapForm( $html ) {
 491
 492                 # Include a <fieldset> wrapper for style, if requested.
 493                 if ( $this->mWrapperLegend !== false ) {
 494                         $html = Xml::fieldset( $this->mWrapperLegend, $html );
 495                 }
 496                 # Use multipart/form-data
 497                 $encType = $this->mUseMultipart
 498                         ? 'multipart/form-data'
 499                         : 'application/x-www-form-urlencoded';
 500                 # Attributes
 501                 $attribs = array(
 502                         'action'  => $this->mAction === false ? $this->getTitle()->getFullURL() : $this->mAction,
 503                         'method'  => $this->mMethod,
 504                         'class'   => 'visualClear',
 505                         'enctype' => $encType,
 506                 );
 507                 if ( !empty( $this->mId ) ) {
 508                         $attribs['id'] = $this->mId;
 509                 }
 510
 511                 return Html::rawElement( 'form', $attribs, $html );
 512         }
 513
 514         /**
 515          * Get the hidden fields that should go inside the form.
 516          * @return String HTML.
 517          */
 518         function getHiddenFields() {
 519                 global $wgUsePathInfo;
 520
 521                 $html = '';
 522                 if( $this->getMethod() == 'post' ){
 523                         $html .= Html::hidden( 'wpEditToken', $this->getUser()->getEditToken(), array( 'id' => 'wpEditToken' ) ) . "\n";
 524                         $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
 525                 }
 526
 527                 if ( !$wgUsePathInfo && $this->getMethod() == 'get' ) {
 528                         $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
 529                 }
 530
 531                 foreach ( $this->mHiddenFields as $data ) {
 532                         list( $value, $attribs ) = $data;
 533                         $html .= Html::hidden( $attribs['name'], $value, $attribs ) . "\n";
 534                 }
 535
 536                 return $html;
 537         }
 538
 539         /**
 540          * Get the submit and (potentially) reset buttons.
 541          * @return String HTML.
 542          */
 543         function getButtons() {
 544                 $html = '';
 545                 $attribs = array();
 546
 547                 if ( isset( $this->mSubmitID ) ) {
 548                         $attribs['id'] = $this->mSubmitID;
 549                 }
 550
 551                 if ( isset( $this->mSubmitName ) ) {
 552                         $attribs['name'] = $this->mSubmitName;
 553                 }
 554
 555                 if ( isset( $this->mSubmitTooltip ) ) {
 556                         $attribs += Linker::tooltipAndAccesskeyAttribs( $this->mSubmitTooltip );
 557                 }
 558
 559                 $attribs['class'] = 'mw-htmlform-submit';
 560
 561                 $html .= Xml::submitButton( $this->getSubmitText(), $attribs ) . "\n";
 562
 563                 if ( $this->mShowReset ) {
 564                         $html .= Html::element(
 565                                 'input',
 566                                 array(
 567                                         'type' => 'reset',
 568                                         'value' => wfMsg( 'htmlform-reset' )
 569                                 )
 570                         ) . "\n";
 571                 }
 572
 573                 foreach ( $this->mButtons as $button ) {
 574                         $attrs = array(
 575                                 'type'  => 'submit',
 576                                 'name'  => $button['name'],
 577                                 'value' => $button['value']
 578                         );
 579
 580                         if ( $button['attribs'] ) {
 581                                 $attrs += $button['attribs'];
 582                         }
 583
 584                         if ( isset( $button['id'] ) ) {
 585                                 $attrs['id'] = $button['id'];
 586                         }
 587
 588                         $html .= Html::element( 'input', $attrs );
 589                 }
 590
 591                 return $html;
 592         }
 593
 594         /**
 595          * Get the whole body of the form.
 596          * @return String
 597          */
 598         function getBody() {
 599                 return $this->displaySection( $this->mFieldTree );
 600         }
 601
 602         /**
 603          * Format and display an error message stack.
 604          * @param $errors String|Array|Status
 605          * @return String
 606          */
 607         function getErrors( $errors ) {
 608                 if ( $errors instanceof Status ) {
 609                         if ( $errors->isOK() ) {
 610                                 $errorstr = '';
 611                         } else {
 612                                 $errorstr = $this->getOutput()->parse( $errors->getWikiText() );
 613                         }
 614                 } elseif ( is_array( $errors ) ) {
 615                         $errorstr = $this->formatErrors( $errors );
 616                 } else {
 617                         $errorstr = $errors;
 618                 }
 619
 620                 return $errorstr
 621                         ? Html::rawElement( 'div', array( 'class' => 'error' ), $errorstr )
 622                         : '';
 623         }
 624
 625         /**
 626          * Format a stack of error messages into a single HTML string
 627          * @param $errors Array of message keys/values
 628          * @return String HTML, a <ul> list of errors
 629          */
 630         public static function formatErrors( $errors ) {
 631                 $errorstr = '';
 632
 633                 foreach ( $errors as $error ) {
 634                         if ( is_array( $error ) ) {
 635                                 $msg = array_shift( $error );
 636                         } else {
 637                                 $msg = $error;
 638                                 $error = array();
 639                         }
 640
 641                         $errorstr .= Html::rawElement(
 642                                 'li',
 643                                 array(),
 644                                 wfMsgExt( $msg, array( 'parseinline' ), $error )
 645                         );
 646                 }
 647
 648                 $errorstr = Html::rawElement( 'ul', array(), $errorstr );
 649
 650                 return $errorstr;
 651         }
 652
 653         /**
 654          * Set the text for the submit button
 655          * @param $t String plaintext.
 656          */
 657         function setSubmitText( $t ) {
 658                 $this->mSubmitText = $t;
 659         }
 660
 661         /**
 662          * Set the text for the submit button to a message
 663          * @since 1.19
 664          * @param $msg String message key
 665          */
 666         public function setSubmitTextMsg( $msg ) {
 667                 return $this->setSubmitText( $this->msg( $msg )->escaped() );
 668         }
 669
 670         /**
 671          * Get the text for the submit button, either customised or a default.
 672          * @return string
 673          */
 674         function getSubmitText() {
 675                 return $this->mSubmitText
 676                         ? $this->mSubmitText
 677                         : wfMsg( 'htmlform-submit' );
 678         }
 679
 680         public function setSubmitName( $name ) {
 681                 $this->mSubmitName = $name;
 682         }
 683
 684         public function setSubmitTooltip( $name ) {
 685                 $this->mSubmitTooltip = $name;
 686         }
 687
 688         /**
 689          * Set the id for the submit button.
 690          * @param $t String.
 691          * @todo FIXME: Integrity of $t is *not* validated
 692          */
 693         function setSubmitID( $t ) {
 694                 $this->mSubmitID = $t;
 695         }
 696
 697         public function setId( $id ) {
 698                 $this->mId = $id;
 699         }
 700         /**
 701          * Prompt the whole form to be wrapped in a <fieldset>, with
 702          * this text as its <legend> element.
 703          * @param $legend String HTML to go inside the <legend> element.
 704          *       Will be escaped
 705          */
 706         public function setWrapperLegend( $legend ) { $this->mWrapperLegend = $legend; }
 707
 708         /**
 709          * Prompt the whole form to be wrapped in a <fieldset>, with
 710          * this message as its <legend> element.
 711          * @since 1.19
 712          * @param $msg String message key
 713          */
 714         public function setWrapperLegendMsg( $msg ) {
 715                 return $this->setWrapperLegend( $this->msg( $msg )->escaped() );
 716         }
 717
 718         /**
 719          * Set the prefix for various default messages
 720          * TODO: currently only used for the <fieldset> legend on forms
 721          * with multiple sections; should be used elsewhre?
 722          * @param $p String
 723          */
 724         function setMessagePrefix( $p ) {
 725                 $this->mMessagePrefix = $p;
 726         }
 727
 728         /**
 729          * Set the title for form submission
 730          * @param $t Title of page the form is on/should be posted to
 731          */
 732         function setTitle( $t ) {
 733                 $this->mTitle = $t;
 734         }
 735
 736         /**
 737          * Get the title
 738          * @return Title
 739          */
 740         function getTitle() {
 741                 return $this->mTitle === false
 742                         ? $this->getContext()->getTitle()
 743                         : $this->mTitle;
 744         }
 745
 746         /**
 747          * Set the method used to submit the form
 748          * @param $method String
 749          */
 750         public function setMethod( $method = 'post' ) {
 751                 $this->mMethod = $method;
 752         }
 753
 754         public function getMethod() {
 755                 return $this->mMethod;
 756         }
 757
 758         /**
 759          * TODO: Document
 760          * @param $fields array[]|HTMLFormField[] array of fields (either arrays or objects)
 761          * @param $sectionName string ID attribute of the <table> tag for this section, ignored if empty
 762          * @param $fieldsetIDPrefix string ID prefix for the <fieldset> tag of each subsection, ignored if empty
 763          * @return String
 764          */
 765         function displaySection( $fields, $sectionName = '', $fieldsetIDPrefix = '' ) {
 766                 $tableHtml = '';
 767                 $subsectionHtml = '';
 768                 $hasLeftColumn = false;
 769
 770                 foreach ( $fields as $key => $value ) {
 771                         if ( is_object( $value ) ) {
 772                                 $v = empty( $value->mParams['nodata'] )
 773                                         ? $this->mFieldData[$key]
 774                                         : $value->getDefault();
 775                                 $tableHtml .= $value->getTableRow( $v );
 776
 777                                 if ( $value->getLabel() != '&#160;' ) {
 778                                         $hasLeftColumn = true;
 779                                 }
 780                         } elseif ( is_array( $value ) ) {
 781                                 $section = $this->displaySection( $value, $key );
 782                                 $legend = $this->getLegend( $key );
 783                                 if ( isset( $this->mSectionHeaders[$key] ) ) {
 784                                         $section = $this->mSectionHeaders[$key] . $section;
 785                                 }
 786                                 if ( isset( $this->mSectionFooters[$key] ) ) {
 787                                         $section .= $this->mSectionFooters[$key];
 788                                 }
 789                                 $attributes = array();
 790                                 if ( $fieldsetIDPrefix ) {
 791                                         $attributes['id'] = Sanitizer::escapeId( "$fieldsetIDPrefix$key" );
 792                                 }
 793                                 $subsectionHtml .= Xml::fieldset( $legend, $section, $attributes ) . "\n";
 794                         }
 795                 }
 796
 797                 $classes = array();
 798
 799                 if ( !$hasLeftColumn ) { // Avoid strange spacing when no labels exist
 800                         $classes[] = 'mw-htmlform-nolabel';
 801                 }
 802
 803                 $attribs = array(
 804                         'class' => implode( ' ', $classes ),
 805                 );
 806
 807                 if ( $sectionName ) {
 808                         $attribs['id'] = Sanitizer::escapeId( "mw-htmlform-$sectionName" );
 809                 }
 810
 811                 $tableHtml = Html::rawElement( 'table', $attribs,
 812                         Html::rawElement( 'tbody', array(), "\n$tableHtml\n" ) ) . "\n";
 813
 814                 if ( $this->mSubSectionBeforeFields ) {
 815                         return $subsectionHtml . "\n" . $tableHtml;
 816                 } else {
 817                         return $tableHtml . "\n" . $subsectionHtml;
 818                 }
 819         }
 820
 821         /**
 822          * Construct the form fields from the Descriptor array
 823          */
 824         function loadData() {
 825                 $fieldData = array();
 826
 827                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 828                         if ( !empty( $field->mParams['nodata'] ) ) {
 829                                 continue;
 830                         } elseif ( !empty( $field->mParams['disabled'] ) ) {
 831                                 $fieldData[$fieldname] = $field->getDefault();
 832                         } else {
 833                                 $fieldData[$fieldname] = $field->loadDataFromRequest( $this->getRequest() );
 834                         }
 835                 }
 836
 837                 # Filter data.
 838                 foreach ( $fieldData as $name => &$value ) {
 839                         $field = $this->mFlatFields[$name];
 840                         $value = $field->filter( $value, $this->mFlatFields );
 841                 }
 842
 843                 $this->mFieldData = $fieldData;
 844         }
 845
 846         /**
 847          * Stop a reset button being shown for this form
 848          * @param $suppressReset Bool set to false to re-enable the
 849          *       button again
 850          */
 851         function suppressReset( $suppressReset = true ) {
 852                 $this->mShowReset = !$suppressReset;
 853         }
 854
 855         /**
 856          * Overload this if you want to apply special filtration routines
 857          * to the form as a whole, after it's submitted but before it's
 858          * processed.
 859          * @param $data
 860          * @return
 861          */
 862         function filterDataForSubmit( $data ) {
 863                 return $data;
 864         }
 865
 866         /**
 867          * Get a string to go in the <legend> of a section fieldset.  Override this if you
 868          * want something more complicated
 869          * @param $key String
 870          * @return String
 871          */
 872         public function getLegend( $key ) {
 873                 return wfMsg( "{$this->mMessagePrefix}-$key" );
 874         }
 875
 876         /**
 877          * Set the value for the action attribute of the form.
 878          * When set to false (which is the default state), the set title is used.
 879          *
 880          * @since 1.19
 881          *
 882          * @param string|bool $action
 883          */
 884         public function setAction( $action ) {
 885                 $this->mAction = $action;
 886         }
 887
 888 }
 889
 890 /**
 891  * The parent class to generate form fields.  Any field type should
 892  * be a subclass of this.
 893  */
 894 abstract class HTMLFormField {
 895
 896         protected $mValidationCallback;
 897         protected $mFilterCallback;
 898         protected $mName;
 899         public $mParams;
 900         protected $mLabel;      # String label.  Set on construction
 901         protected $mID;
 902         protected $mClass = '';
 903         protected $mDefault;
 904
 905         /**
 906          * @var HTMLForm
 907          */
 908         public $mParent;
 909
 910         /**
 911          * This function must be implemented to return the HTML to generate
 912          * the input object itself.  It should not implement the surrounding
 913          * table cells/rows, or labels/help messages.
 914          * @param $value String the value to set the input to; eg a default
 915          *       text for a text input.
 916          * @return String valid HTML.
 917          */
 918         abstract function getInputHTML( $value );
 919
 920         /**
 921          * Override this function to add specific validation checks on the
 922          * field input.  Don't forget to call parent::validate() to ensure
 923          * that the user-defined callback mValidationCallback is still run
 924          * @param $value String the value the field was submitted with
 925          * @param $alldata Array the data collected from the form
 926          * @return Mixed Bool true on success, or String error to display.
 927          */
 928         function validate( $value, $alldata ) {
 929                 if ( isset( $this->mParams['required'] ) && $value === '' ) {
 930                         return wfMsgExt( 'htmlform-required', 'parseinline' );
 931                 }
 932
 933                 if ( isset( $this->mValidationCallback ) ) {
 934                         return call_user_func( $this->mValidationCallback, $value, $alldata, $this->mParent );
 935                 }
 936
 937                 return true;
 938         }
 939
 940         function filter( $value, $alldata ) {
 941                 if ( isset( $this->mFilterCallback ) ) {
 942                         $value = call_user_func( $this->mFilterCallback, $value, $alldata, $this->mParent );
 943                 }
 944
 945                 return $value;
 946         }
 947
 948         /**
 949          * Should this field have a label, or is there no input element with the
 950          * appropriate id for the label to point to?
 951          *
 952          * @return bool True to output a label, false to suppress
 953          */
 954         protected function needsLabel() {
 955                 return true;
 956         }
 957
 958         /**
 959          * Get the value that this input has been set to from a posted form,
 960          * or the input's default value if it has not been set.
 961          * @param $request WebRequest
 962          * @return String the value
 963          */
 964         function loadDataFromRequest( $request ) {
 965                 if ( $request->getCheck( $this->mName ) ) {
 966                         return $request->getText( $this->mName );
 967                 } else {
 968                         return $this->getDefault();
 969                 }
 970         }
 971
 972         /**
 973          * Initialise the object
 974          * @param $params array Associative Array. See HTMLForm doc for syntax.
 975          */
 976         function __construct( $params ) {
 977                 $this->mParams = $params;
 978
 979                 # Generate the label from a message, if possible
 980                 if ( isset( $params['label-message'] ) ) {
 981                         $msgInfo = $params['label-message'];
 982
 983                         if ( is_array( $msgInfo ) ) {
 984                                 $msg = array_shift( $msgInfo );
 985                         } else {
 986                                 $msg = $msgInfo;
 987                                 $msgInfo = array();
 988                         }
 989
 990                         $this->mLabel = wfMsgExt( $msg, 'parseinline', $msgInfo );
 991                 } elseif ( isset( $params['label'] ) ) {
 992                         $this->mLabel = $params['label'];
 993                 }
 994
 995                 $this->mName = "wp{$params['fieldname']}";
 996                 if ( isset( $params['name'] ) ) {
 997                         $this->mName = $params['name'];
 998                 }
 999
1000                 $validName = Sanitizer::escapeId( $this->mName );
1001                 if ( $this->mName != $validName && !isset( $params['nodata'] ) ) {
1002                         throw new MWException( "Invalid name '{$this->mName}' passed to " . __METHOD__ );
1003                 }
1004
1005                 $this->mID = "mw-input-{$this->mName}";
1006
1007                 if ( isset( $params['default'] ) ) {
1008                         $this->mDefault = $params['default'];
1009                 }
1010
1011                 if ( isset( $params['id'] ) ) {
1012                         $id = $params['id'];
1013                         $validId = Sanitizer::escapeId( $id );
1014
1015                         if ( $id != $validId ) {
1016                                 throw new MWException( "Invalid id '$id' passed to " . __METHOD__ );
1017                         }
1018
1019                         $this->mID = $id;
1020                 }
1021
1022                 if ( isset( $params['cssclass'] ) ) {
1023                         $this->mClass = $params['cssclass'];
1024                 }
1025
1026                 if ( isset( $params['validation-callback'] ) ) {
1027                         $this->mValidationCallback = $params['validation-callback'];
1028                 }
1029
1030                 if ( isset( $params['filter-callback'] ) ) {
1031                         $this->mFilterCallback = $params['filter-callback'];
1032                 }
1033
1034                 if ( isset( $params['flatlist'] ) ){
1035                         $this->mClass .= ' mw-htmlform-flatlist';
1036                 }
1037         }
1038
1039         /**
1040          * Get the complete table row for the input, including help text,
1041          * labels, and whatever.
1042          * @param $value String the value to set the input to.
1043          * @return String complete HTML table row.
1044          */
1045         function getTableRow( $value ) {
1046                 # Check for invalid data.
1047
1048                 $errors = $this->validate( $value, $this->mParent->mFieldData );
1049
1050                 $cellAttributes = array();
1051                 $verticalLabel = false;
1052
1053                 if ( !empty($this->mParams['vertical-label']) ) {
1054                         $cellAttributes['colspan'] = 2;
1055                         $verticalLabel = true;
1056                 }
1057
1058                 if ( $errors === true || ( !$this->mParent->getRequest()->wasPosted() && ( $this->mParent->getMethod() == 'post' ) ) ) {
1059                         $errors = '';
1060                         $errorClass = '';
1061                 } else {
1062                         $errors = self::formatErrors( $errors );
1063                         $errorClass = 'mw-htmlform-invalid-input';
1064                 }
1065
1066                 $label = $this->getLabelHtml( $cellAttributes );
1067                 $field = Html::rawElement(
1068                         'td',
1069                         array( 'class' => 'mw-input' ) + $cellAttributes,
1070                         $this->getInputHTML( $value ) . "\n$errors"
1071                 );
1072
1073                 $fieldType = get_class( $this );
1074
1075                 if ( $verticalLabel ) {
1076                         $html = Html::rawElement( 'tr',
1077                                 array( 'class' => 'mw-htmlform-vertical-label' ), $label );
1078                         $html .= Html::rawElement( 'tr',
1079                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass" ),
1080                                 $field );
1081                 } else {
1082                         $html = Html::rawElement( 'tr',
1083                                 array( 'class' => "mw-htmlform-field-$fieldType {$this->mClass} $errorClass" ),
1084                                 $label . $field );
1085                 }
1086
1087                 $helptext = null;
1088
1089                 if ( isset( $this->mParams['help-message'] ) ) {
1090                         $this->mParams['help-messages'] = array( $this->mParams['help-message'] );
1091                 }
1092
1093                 if ( isset( $this->mParams['help-messages'] ) ) {
1094                         foreach( $this->mParams['help-messages'] as $name ) {
1095                                 $helpMessage = (array)$name;
1096                                 $msg = wfMessage( array_shift( $helpMessage ), $helpMessage );
1097
1098                                 if( $msg->exists() ) {
1099                                         $helptext .= $msg->parse(); // Append message
1100                                 }
1101                         }
1102                 }
1103                 elseif ( isset( $this->mParams['help'] ) ) {
1104                         $helptext = $this->mParams['help'];
1105                 }
1106
1107                 if ( !is_null( $helptext ) ) {
1108                         $row = Html::rawElement(
1109                                 'td',
1110                                 array( 'colspan' => 2, 'class' => 'htmlform-tip' ),
1111                                 $helptext
1112                         );
1113                         $row = Html::rawElement( 'tr', array(), $row );
1114                         $html .= "$row\n";
1115                 }
1116
1117                 return $html;
1118         }
1119
1120         function getLabel() {
1121                 return $this->mLabel;
1122         }
1123         function getLabelHtml( $cellAttributes = array() ) {
1124                 # Don't output a for= attribute for labels with no associated input.
1125                 # Kind of hacky here, possibly we don't want these to be <label>s at all.
1126                 $for = array();
1127
1128                 if ( $this->needsLabel() ) {
1129                         $for['for'] = $this->mID;
1130                 }
1131
1132                 return Html::rawElement( 'td', array( 'class' => 'mw-label' ) + $cellAttributes,
1133                         Html::rawElement( 'label', $for, $this->getLabel() )
1134                 );
1135         }
1136
1137         function getDefault() {
1138                 if ( isset( $this->mDefault ) ) {
1139                         return $this->mDefault;
1140                 } else {
1141                         return null;
1142                 }
1143         }
1144
1145         /**
1146          * Returns the attributes required for the tooltip and accesskey.
1147          *
1148          * @return array Attributes
1149          */
1150         public function getTooltipAndAccessKey() {
1151                 if ( empty( $this->mParams['tooltip'] ) ) {
1152                         return array();
1153                 }
1154                 return Linker::tooltipAndAccesskeyAttribs( $this->mParams['tooltip'] );
1155         }
1156
1157         /**
1158          * flatten an array of options to a single array, for instance,
1159          * a set of <options> inside <optgroups>.
1160          * @param $options array Associative Array with values either Strings
1161          *       or Arrays
1162          * @return Array flattened input
1163          */
1164         public static function flattenOptions( $options ) {
1165                 $flatOpts = array();
1166
1167                 foreach ( $options as $value ) {
1168                         if ( is_array( $value ) ) {
1169                                 $flatOpts = array_merge( $flatOpts, self::flattenOptions( $value ) );
1170                         } else {
1171                                 $flatOpts[] = $value;
1172                         }
1173                 }
1174
1175                 return $flatOpts;
1176         }
1177
1178         /**
1179          * Formats one or more errors as accepted by field validation-callback.
1180          * @param $errors String|Message|Array of strings or Message instances
1181          * @return String html
1182          * @since 1.18
1183          */
1184         protected static function formatErrors( $errors ) {
1185                 if ( is_array( $errors ) && count( $errors ) === 1 ) {
1186                         $errors = array_shift( $errors );
1187                 }
1188
1189                 if ( is_array( $errors ) ) {
1190                         $lines = array();
1191                         foreach ( $errors as $error ) {
1192                                 if ( $error instanceof Message ) {
1193                                         $lines[] = Html::rawElement( 'li', array(), $error->parse() );
1194                                 } else {
1195                                         $lines[] = Html::rawElement( 'li', array(), $error );
1196                                 }
1197                         }
1198                         return Html::rawElement( 'ul', array( 'class' => 'error' ), implode( "\n", $lines ) );
1199                 } else {
1200                         if ( $errors instanceof Message ) {
1201                                 $errors = $errors->parse();
1202                         }
1203                         return Html::rawElement( 'span', array( 'class' => 'error' ), $errors );
1204                 }
1205         }
1206 }
1207
1208 class HTMLTextField extends HTMLFormField {
1209         function getSize() {
1210                 return isset( $this->mParams['size'] )
1211                         ? $this->mParams['size']
1212                         : 45;
1213         }
1214
1215         function getInputHTML( $value ) {
1216                 $attribs = array(
1217                         'id' => $this->mID,
1218                         'name' => $this->mName,
1219                         'size' => $this->getSize(),
1220                         'value' => $value,
1221                 ) + $this->getTooltipAndAccessKey();
1222
1223                 if ( $this->mClass !== '' ) {
1224                         $attribs['class'] = $this->mClass;
1225                 }
1226
1227                 if ( isset( $this->mParams['maxlength'] ) ) {
1228                         $attribs['maxlength'] = $this->mParams['maxlength'];
1229                 }
1230
1231                 if ( !empty( $this->mParams['disabled'] ) ) {
1232                         $attribs['disabled'] = 'disabled';
1233                 }
1234
1235                 # TODO: Enforce pattern, step, required, readonly on the server side as
1236                 # well
1237                 foreach ( array( 'min', 'max', 'pattern', 'title', 'step',
1238                 'placeholder' ) as $param ) {
1239                         if ( isset( $this->mParams[$param] ) ) {
1240                                 $attribs[$param] = $this->mParams[$param];
1241                         }
1242                 }
1243
1244                 foreach ( array( 'required', 'autofocus', 'multiple', 'readonly' ) as $param ) {
1245                         if ( isset( $this->mParams[$param] ) ) {
1246                                 $attribs[$param] = '';
1247                         }
1248                 }
1249
1250                 # Implement tiny differences between some field variants
1251                 # here, rather than creating a new class for each one which
1252                 # is essentially just a clone of this one.
1253                 if ( isset( $this->mParams['type'] ) ) {
1254                         switch ( $this->mParams['type'] ) {
1255                                 case 'email':
1256                                         $attribs['type'] = 'email';
1257                                         break;
1258                                 case 'int':
1259                                         $attribs['type'] = 'number';
1260                                         break;
1261                                 case 'float':
1262                                         $attribs['type'] = 'number';
1263                                         $attribs['step'] = 'any';
1264                                         break;
1265                                 # Pass through
1266                                 case 'password':
1267                                 case 'file':
1268                                         $attribs['type'] = $this->mParams['type'];
1269                                         break;
1270                         }
1271                 }
1272
1273                 return Html::element( 'input', $attribs );
1274         }
1275 }
1276 class HTMLTextAreaField extends HTMLFormField {
1277         function getCols() {
1278                 return isset( $this->mParams['cols'] )
1279                         ? $this->mParams['cols']
1280                         : 80;
1281         }
1282
1283         function getRows() {
1284                 return isset( $this->mParams['rows'] )
1285                         ? $this->mParams['rows']
1286                         : 25;
1287         }
1288
1289         function getInputHTML( $value ) {
1290                 $attribs = array(
1291                         'id' => $this->mID,
1292                         'name' => $this->mName,
1293                         'cols' => $this->getCols(),
1294                         'rows' => $this->getRows(),
1295                 ) + $this->getTooltipAndAccessKey();
1296
1297                 if ( $this->mClass !== '' ) {
1298                         $attribs['class'] = $this->mClass;
1299                 }
1300
1301                 if ( !empty( $this->mParams['disabled'] ) ) {
1302                         $attribs['disabled'] = 'disabled';
1303                 }
1304
1305                 if ( !empty( $this->mParams['readonly'] ) ) {
1306                         $attribs['readonly'] = 'readonly';
1307                 }
1308
1309                 foreach ( array( 'required', 'autofocus' ) as $param ) {
1310                         if ( isset( $this->mParams[$param] ) ) {
1311                                 $attribs[$param] = '';
1312                         }
1313                 }
1314
1315                 return Html::element( 'textarea', $attribs, $value );
1316         }
1317 }
1318
1319 /**
1320  * A field that will contain a numeric value
1321  */
1322 class HTMLFloatField extends HTMLTextField {
1323         function getSize() {
1324                 return isset( $this->mParams['size'] )
1325                         ? $this->mParams['size']
1326                         : 20;
1327         }
1328
1329         function validate( $value, $alldata ) {
1330                 $p = parent::validate( $value, $alldata );
1331
1332                 if ( $p !== true ) {
1333                         return $p;
1334                 }
1335
1336                 $value = trim( $value );
1337
1338                 # http://dev.w3.org/html5/spec/common-microsyntaxes.html#real-numbers
1339                 # with the addition that a leading '+' sign is ok.
1340                 if ( !preg_match( '/^((\+|\-)?\d+(\.\d+)?(E(\+|\-)?\d+)?)?$/i', $value ) ) {
1341                         return wfMsgExt( 'htmlform-float-invalid', 'parse' );
1342                 }
1343
1344                 # The "int" part of these message names is rather confusing.
1345                 # They make equal sense for all numbers.
1346                 if ( isset( $this->mParams['min'] ) ) {
1347                         $min = $this->mParams['min'];
1348
1349                         if ( $min > $value ) {
1350                                 return wfMsgExt( 'htmlform-int-toolow', 'parse', array( $min ) );
1351                         }
1352                 }
1353
1354                 if ( isset( $this->mParams['max'] ) ) {
1355                         $max = $this->mParams['max'];
1356
1357                         if ( $max < $value ) {
1358                                 return wfMsgExt( 'htmlform-int-toohigh', 'parse', array( $max ) );
1359                         }
1360                 }
1361
1362                 return true;
1363         }
1364 }
1365
1366 /**
1367  * A field that must contain a number
1368  */
1369 class HTMLIntField extends HTMLFloatField {
1370         function validate( $value, $alldata ) {
1371                 $p = parent::validate( $value, $alldata );
1372
1373                 if ( $p !== true ) {
1374                         return $p;
1375                 }
1376
1377                 # http://dev.w3.org/html5/spec/common-microsyntaxes.html#signed-integers
1378                 # with the addition that a leading '+' sign is ok. Note that leading zeros
1379                 # are fine, and will be left in the input, which is useful for things like
1380                 # phone numbers when you know that they are integers (the HTML5 type=tel
1381                 # input does not require its value to be numeric).  If you want a tidier
1382                 # value to, eg, save in the DB, clean it up with intval().
1383                 if ( !preg_match( '/^((\+|\-)?\d+)?$/', trim( $value ) )
1384                 ) {
1385                         return wfMsgExt( 'htmlform-int-invalid', 'parse' );
1386                 }
1387
1388                 return true;
1389         }
1390 }
1391
1392 /**
1393  * A checkbox field
1394  */
1395 class HTMLCheckField extends HTMLFormField {
1396         function getInputHTML( $value ) {
1397                 if ( !empty( $this->mParams['invert'] ) ) {
1398                         $value = !$value;
1399                 }
1400
1401                 $attr = $this->getTooltipAndAccessKey();
1402                 $attr['id'] = $this->mID;
1403
1404                 if ( !empty( $this->mParams['disabled'] ) ) {
1405                         $attr['disabled'] = 'disabled';
1406                 }
1407
1408                 if ( $this->mClass !== '' ) {
1409                         $attr['class'] = $this->mClass;
1410                 }
1411
1412                 return Xml::check( $this->mName, $value, $attr ) . '&#160;' .
1413                         Html::rawElement( 'label', array( 'for' => $this->mID ), $this->mLabel );
1414         }
1415
1416         /**
1417          * For a checkbox, the label goes on the right hand side, and is
1418          * added in getInputHTML(), rather than HTMLFormField::getRow()
1419          * @return String
1420          */
1421         function getLabel() {
1422                 return '&#160;';
1423         }
1424
1425         /**
1426          * @param  $request WebRequest
1427          * @return String
1428          */
1429         function loadDataFromRequest( $request ) {
1430                 $invert = false;
1431                 if ( isset( $this->mParams['invert'] ) && $this->mParams['invert'] ) {
1432                         $invert = true;
1433                 }
1434
1435                 // GetCheck won't work like we want for checks.
1436                 // Fetch the value in either one of the two following case:
1437                 // - we have a valid token (form got posted or GET forged by the user)
1438                 // - checkbox name has a value (false or true), ie is not null
1439                 if ( $request->getCheck( 'wpEditToken' ) || $request->getVal( $this->mName )!== null ) {
1440                         // XOR has the following truth table, which is what we want
1441                         // INVERT VALUE | OUTPUT
1442                         // true   true  | false
1443                         // false  true  | true
1444                         // false  false | false
1445                         // true   false | true
1446                         return $request->getBool( $this->mName ) xor $invert;
1447                 } else {
1448                         return $this->getDefault();
1449                 }
1450         }
1451 }
1452
1453 /**
1454  * A select dropdown field.  Basically a wrapper for Xmlselect class
1455  */
1456 class HTMLSelectField extends HTMLFormField {
1457         function validate( $value, $alldata ) {
1458                 $p = parent::validate( $value, $alldata );
1459
1460                 if ( $p !== true ) {
1461                         return $p;
1462                 }
1463
1464                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1465
1466                 if ( in_array( $value, $validOptions ) )
1467                         return true;
1468                 else
1469                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1470         }
1471
1472         function getInputHTML( $value ) {
1473                 $select = new XmlSelect( $this->mName, $this->mID, strval( $value ) );
1474
1475                 # If one of the options' 'name' is int(0), it is automatically selected.
1476                 # because PHP sucks and thinks int(0) == 'some string'.
1477                 # Working around this by forcing all of them to strings.
1478                 foreach( $this->mParams['options'] as &$opt ){
1479                         if( is_int( $opt ) ){
1480                                 $opt = strval( $opt );
1481                         }
1482                 }
1483                 unset( $opt ); # PHP keeps $opt around as a reference, which is a bit scary
1484
1485                 if ( !empty( $this->mParams['disabled'] ) ) {
1486                         $select->setAttribute( 'disabled', 'disabled' );
1487                 }
1488
1489                 if ( $this->mClass !== '' ) {
1490                         $select->setAttribute( 'class', $this->mClass );
1491                 }
1492
1493                 $select->addOptions( $this->mParams['options'] );
1494
1495                 return $select->getHTML();
1496         }
1497 }
1498
1499 /**
1500  * Select dropdown field, with an additional "other" textbox.
1501  */
1502 class HTMLSelectOrOtherField extends HTMLTextField {
1503         static $jsAdded = false;
1504
1505         function __construct( $params ) {
1506                 if ( !in_array( 'other', $params['options'], true ) ) {
1507                         $msg = isset( $params['other'] ) ? $params['other'] : wfMsg( 'htmlform-selectorother-other' );
1508                         $params['options'][$msg] = 'other';
1509                 }
1510
1511                 parent::__construct( $params );
1512         }
1513
1514         static function forceToStringRecursive( $array ) {
1515                 if ( is_array( $array ) ) {
1516                         return array_map( array( __CLASS__, 'forceToStringRecursive' ), $array );
1517                 } else {
1518                         return strval( $array );
1519                 }
1520         }
1521
1522         function getInputHTML( $value ) {
1523                 $valInSelect = false;
1524
1525                 if ( $value !== false ) {
1526                         $valInSelect = in_array(
1527                                 $value,
1528                                 HTMLFormField::flattenOptions( $this->mParams['options'] )
1529                         );
1530                 }
1531
1532                 $selected = $valInSelect ? $value : 'other';
1533
1534                 $opts = self::forceToStringRecursive( $this->mParams['options'] );
1535
1536                 $select = new XmlSelect( $this->mName, $this->mID, $selected );
1537                 $select->addOptions( $opts );
1538
1539                 $select->setAttribute( 'class', 'mw-htmlform-select-or-other' );
1540
1541                 $tbAttribs = array( 'id' => $this->mID . '-other', 'size' => $this->getSize() );
1542
1543                 if ( !empty( $this->mParams['disabled'] ) ) {
1544                         $select->setAttribute( 'disabled', 'disabled' );
1545                         $tbAttribs['disabled'] = 'disabled';
1546                 }
1547
1548                 $select = $select->getHTML();
1549
1550                 if ( isset( $this->mParams['maxlength'] ) ) {
1551                         $tbAttribs['maxlength'] = $this->mParams['maxlength'];
1552                 }
1553
1554                 if ( $this->mClass !== '' ) {
1555                         $tbAttribs['class'] = $this->mClass;
1556                 }
1557
1558                 $textbox = Html::input(
1559                         $this->mName . '-other',
1560                         $valInSelect ? '' : $value,
1561                         'text',
1562                         $tbAttribs
1563                 );
1564
1565                 return "$select<br />\n$textbox";
1566         }
1567
1568         /**
1569          * @param  $request WebRequest
1570          * @return String
1571          */
1572         function loadDataFromRequest( $request ) {
1573                 if ( $request->getCheck( $this->mName ) ) {
1574                         $val = $request->getText( $this->mName );
1575
1576                         if ( $val == 'other' ) {
1577                                 $val = $request->getText( $this->mName . '-other' );
1578                         }
1579
1580                         return $val;
1581                 } else {
1582                         return $this->getDefault();
1583                 }
1584         }
1585 }
1586
1587 /**
1588  * Multi-select field
1589  */
1590 class HTMLMultiSelectField extends HTMLFormField {
1591
1592         function validate( $value, $alldata ) {
1593                 $p = parent::validate( $value, $alldata );
1594
1595                 if ( $p !== true ) {
1596                         return $p;
1597                 }
1598
1599                 if ( !is_array( $value ) ) {
1600                         return false;
1601                 }
1602
1603                 # If all options are valid, array_intersect of the valid options
1604                 # and the provided options will return the provided options.
1605                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1606
1607                 $validValues = array_intersect( $value, $validOptions );
1608                 if ( count( $validValues ) == count( $value ) ) {
1609                         return true;
1610                 } else {
1611                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1612                 }
1613         }
1614
1615         function getInputHTML( $value ) {
1616                 $html = $this->formatOptions( $this->mParams['options'], $value );
1617
1618                 return $html;
1619         }
1620
1621         function formatOptions( $options, $value ) {
1622                 $html = '';
1623
1624                 $attribs = array();
1625
1626                 if ( !empty( $this->mParams['disabled'] ) ) {
1627                         $attribs['disabled'] = 'disabled';
1628                 }
1629
1630                 foreach ( $options as $label => $info ) {
1631                         if ( is_array( $info ) ) {
1632                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1633                                 $html .= $this->formatOptions( $info, $value );
1634                         } else {
1635                                 $thisAttribs = array( 'id' => "{$this->mID}-$info", 'value' => $info );
1636
1637                                 $checkbox = Xml::check(
1638                                         $this->mName . '[]',
1639                                         in_array( $info, $value, true ),
1640                                         $attribs + $thisAttribs );
1641                                 $checkbox .= '&#160;' . Html::rawElement( 'label', array( 'for' => "{$this->mID}-$info" ), $label );
1642
1643                                 $html .= ' ' . Html::rawElement( 'div', array( 'class' => 'mw-htmlform-flatlist-item' ), $checkbox );
1644                         }
1645                 }
1646
1647                 return $html;
1648         }
1649
1650         /**
1651          * @param  $request WebRequest
1652          * @return String
1653          */
1654         function loadDataFromRequest( $request ) {
1655                 if ( $this->mParent->getMethod() == 'post' ) {
1656                         if( $request->wasPosted() ){
1657                                 # Checkboxes are just not added to the request arrays if they're not checked,
1658                                 # so it's perfectly possible for there not to be an entry at all
1659                                 return $request->getArray( $this->mName, array() );
1660                         } else {
1661                                 # That's ok, the user has not yet submitted the form, so show the defaults
1662                                 return $this->getDefault();
1663                         }
1664                 } else {
1665                         # This is the impossible case: if we look at $_GET and see no data for our
1666                         # field, is it because the user has not yet submitted the form, or that they
1667                         # have submitted it with all the options unchecked? We will have to assume the
1668                         # latter, which basically means that you can't specify 'positive' defaults
1669                         # for GET forms.
1670                         # @todo FIXME...
1671                         return $request->getArray( $this->mName, array() );
1672                 }
1673         }
1674
1675         function getDefault() {
1676                 if ( isset( $this->mDefault ) ) {
1677                         return $this->mDefault;
1678                 } else {
1679                         return array();
1680                 }
1681         }
1682
1683         protected function needsLabel() {
1684                 return false;
1685         }
1686 }
1687
1688 /**
1689  * Double field with a dropdown list constructed from a system message in the format
1690  *     * Optgroup header
1691  *     ** <option value>
1692  *     * New Optgroup header
1693  * Plus a text field underneath for an additional reason.  The 'value' of the field is
1694  * ""<select>: <extra reason>"", or "<extra reason>" if nothing has been selected in the
1695  * select dropdown.
1696  * @todo FIXME: If made 'required', only the text field should be compulsory.
1697  */
1698 class HTMLSelectAndOtherField extends HTMLSelectField {
1699
1700         function __construct( $params ) {
1701                 if ( array_key_exists( 'other', $params ) ) {
1702                 } elseif( array_key_exists( 'other-message', $params ) ){
1703                         $params['other'] = wfMessage( $params['other-message'] )->plain();
1704                 } else {
1705                         $params['other'] = null;
1706                 }
1707
1708                 if ( array_key_exists( 'options', $params ) ) {
1709                         # Options array already specified
1710                 } elseif( array_key_exists( 'options-message', $params ) ){
1711                         # Generate options array from a system message
1712                         $params['options'] = self::parseMessage(
1713                                 wfMessage( $params['options-message'] )->inContentLanguage()->plain(),
1714                                 $params['other']
1715                         );
1716                 } else {
1717                         # Sulk
1718                         throw new MWException( 'HTMLSelectAndOtherField called without any options' );
1719                 }
1720                 $this->mFlatOptions = self::flattenOptions( $params['options'] );
1721
1722                 parent::__construct( $params );
1723         }
1724
1725         /**
1726          * Build a drop-down box from a textual list.
1727          * @param $string String message text
1728          * @param $otherName String name of "other reason" option
1729          * @return Array
1730          * TODO: this is copied from Xml::listDropDown(), deprecate/avoid duplication?
1731          */
1732         public static function parseMessage( $string, $otherName=null ) {
1733                 if( $otherName === null ){
1734                         $otherName = wfMessage( 'htmlform-selectorother-other' )->plain();
1735                 }
1736
1737                 $optgroup = false;
1738                 $options = array( $otherName => 'other' );
1739
1740                 foreach ( explode( "\n", $string ) as $option ) {
1741                         $value = trim( $option );
1742                         if ( $value == '' ) {
1743                                 continue;
1744                         } elseif ( substr( $value, 0, 1) == '*' && substr( $value, 1, 1) != '*' ) {
1745                                 # A new group is starting...
1746                                 $value = trim( substr( $value, 1 ) );
1747                                 $optgroup = $value;
1748                         } elseif ( substr( $value, 0, 2) == '**' ) {
1749                                 # groupmember
1750                                 $opt = trim( substr( $value, 2 ) );
1751                                 if( $optgroup === false ){
1752                                         $options[$opt] = $opt;
1753                                 } else {
1754                                         $options[$optgroup][$opt] = $opt;
1755                                 }
1756                         } else {
1757                                 # groupless reason list
1758                                 $optgroup = false;
1759                                 $options[$option] = $option;
1760                         }
1761                 }
1762
1763                 return $options;
1764         }
1765
1766         function getInputHTML( $value ) {
1767                 $select = parent::getInputHTML( $value[1] );
1768
1769                 $textAttribs = array(
1770                         'id' => $this->mID . '-other',
1771                         'size' => $this->getSize(),
1772                 );
1773
1774                 if ( $this->mClass !== '' ) {
1775                         $textAttribs['class'] = $this->mClass;
1776                 }
1777
1778                 foreach ( array( 'required', 'autofocus', 'multiple', 'disabled' ) as $param ) {
1779                         if ( isset( $this->mParams[$param] ) ) {
1780                                 $textAttribs[$param] = '';
1781                         }
1782                 }
1783
1784                 $textbox = Html::input(
1785                         $this->mName . '-other',
1786                         $value[2],
1787                         'text',
1788                         $textAttribs
1789                 );
1790
1791                 return "$select<br />\n$textbox";
1792         }
1793
1794         /**
1795          * @param  $request WebRequest
1796          * @return Array( <overall message>, <select value>, <text field value> )
1797          */
1798         function loadDataFromRequest( $request ) {
1799                 if ( $request->getCheck( $this->mName ) ) {
1800
1801                         $list = $request->getText( $this->mName );
1802                         $text = $request->getText( $this->mName . '-other' );
1803
1804                         if ( $list == 'other' ) {
1805                                 $final = $text;
1806                         } elseif( !in_array( $list, $this->mFlatOptions ) ){
1807                                 # User has spoofed the select form to give an option which wasn't
1808                                 # in the original offer.  Sulk...
1809                                 $final = $text;
1810                         } elseif( $text == '' ) {
1811                                 $final = $list;
1812                         } else {
1813                                 $final = $list . wfMsgForContent( 'colon-separator' ) . $text;
1814                         }
1815
1816                 } else {
1817                         $final = $this->getDefault();
1818
1819                         $list = 'other';
1820                         $text = $final;
1821                         foreach ( $this->mFlatOptions as $option ) {
1822                                 $match = $option . wfMsgForContent( 'colon-separator' );
1823                                 if( strpos( $text, $match ) === 0 ) {
1824                                         $list = $option;
1825                                         $text = substr( $text, strlen( $match ) );
1826                                         break;
1827                                 }
1828                         }
1829                 }
1830                 return array( $final, $list, $text );
1831         }
1832
1833         function getSize() {
1834                 return isset( $this->mParams['size'] )
1835                         ? $this->mParams['size']
1836                         : 45;
1837         }
1838
1839         function validate( $value, $alldata ) {
1840                 # HTMLSelectField forces $value to be one of the options in the select
1841                 # field, which is not useful here.  But we do want the validation further up
1842                 # the chain
1843                 $p = parent::validate( $value[1], $alldata );
1844
1845                 if ( $p !== true ) {
1846                         return $p;
1847                 }
1848
1849                 if( isset( $this->mParams['required'] ) && $value[1] === '' ){
1850                         return wfMsgExt( 'htmlform-required', 'parseinline' );
1851                 }
1852
1853                 return true;
1854         }
1855 }
1856
1857 /**
1858  * Radio checkbox fields.
1859  */
1860 class HTMLRadioField extends HTMLFormField {
1861
1862
1863         function validate( $value, $alldata ) {
1864                 $p = parent::validate( $value, $alldata );
1865
1866                 if ( $p !== true ) {
1867                         return $p;
1868                 }
1869
1870                 if ( !is_string( $value ) && !is_int( $value ) ) {
1871                         return false;
1872                 }
1873
1874                 $validOptions = HTMLFormField::flattenOptions( $this->mParams['options'] );
1875
1876                 if ( in_array( $value, $validOptions ) ) {
1877                         return true;
1878                 } else {
1879                         return wfMsgExt( 'htmlform-select-badoption', 'parseinline' );
1880                 }
1881         }
1882
1883         /**
1884          * This returns a block of all the radio options, in one cell.
1885          * @see includes/HTMLFormField#getInputHTML()
1886          * @param $value String
1887          * @return String
1888          */
1889         function getInputHTML( $value ) {
1890                 $html = $this->formatOptions( $this->mParams['options'], $value );
1891
1892                 return $html;
1893         }
1894
1895         function formatOptions( $options, $value ) {
1896                 $html = '';
1897
1898                 $attribs = array();
1899                 if ( !empty( $this->mParams['disabled'] ) ) {
1900                         $attribs['disabled'] = 'disabled';
1901                 }
1902
1903                 # TODO: should this produce an unordered list perhaps?
1904                 foreach ( $options as $label => $info ) {
1905                         if ( is_array( $info ) ) {
1906                                 $html .= Html::rawElement( 'h1', array(), $label ) . "\n";
1907                                 $html .= $this->formatOptions( $info, $value );
1908                         } else {
1909                                 $id = Sanitizer::escapeId( $this->mID . "-$info" );
1910                                 $radio = Xml::radio(
1911                                         $this->mName,
1912                                         $info,
1913                                         $info == $value,
1914                                         $attribs + array( 'id' => $id )
1915                                 );
1916                                 $radio .= '&#160;' .
1917                                                 Html::rawElement( 'label', array( 'for' => $id ), $label );
1918
1919                                 $html .= ' ' . Html::rawElement( 'div', array( 'class' => 'mw-htmlform-flatlist-item' ), $radio );
1920                         }
1921                 }
1922
1923                 return $html;
1924         }
1925
1926         protected function needsLabel() {
1927                 return false;
1928         }
1929 }
1930
1931 /**
1932  * An information field (text blob), not a proper input.
1933  */
1934 class HTMLInfoField extends HTMLFormField {
1935         function __construct( $info ) {
1936                 $info['nodata'] = true;
1937
1938                 parent::__construct( $info );
1939         }
1940
1941         function getInputHTML( $value ) {
1942                 return !empty( $this->mParams['raw'] ) ? $value : htmlspecialchars( $value );
1943         }
1944
1945         function getTableRow( $value ) {
1946                 if ( !empty( $this->mParams['rawrow'] ) ) {
1947                         return $value;
1948                 }
1949
1950                 return parent::getTableRow( $value );
1951         }
1952
1953         protected function needsLabel() {
1954                 return false;
1955         }
1956 }
1957
1958 class HTMLHiddenField extends HTMLFormField {
1959         public function __construct( $params ) {
1960                 parent::__construct( $params );
1961
1962                 # Per HTML5 spec, hidden fields cannot be 'required'
1963                 # http://dev.w3.org/html5/spec/states-of-the-type-attribute.html#hidden-state
1964                 unset( $this->mParams['required'] );
1965         }
1966
1967         public function getTableRow( $value ) {
1968                 $params = array();
1969                 if ( $this->mID ) {
1970                         $params['id'] = $this->mID;
1971                 }
1972
1973                 $this->mParent->addHiddenField(
1974                         $this->mName,
1975                         $this->mDefault,
1976                         $params
1977                 );
1978
1979                 return '';
1980         }
1981
1982         public function getInputHTML( $value ) { return ''; }
1983 }
1984
1985 /**
1986  * Add a submit button inline in the form (as opposed to
1987  * HTMLForm::addButton(), which will add it at the end).
1988  */
1989 class HTMLSubmitField extends HTMLFormField {
1990
1991         function __construct( $info ) {
1992                 $info['nodata'] = true;
1993                 parent::__construct( $info );
1994         }
1995
1996         function getInputHTML( $value ) {
1997                 return Xml::submitButton(
1998                         $value,
1999                         array(
2000                                 'class' => 'mw-htmlform-submit ' . $this->mClass,
2001                                 'name' => $this->mName,
2002                                 'id' => $this->mID,
2003                         )
2004                 );
2005         }
2006
2007         protected function needsLabel() {
2008                 return false;
2009         }
2010
2011         /**
2012          * Button cannot be invalid
2013          * @param $value String
2014          * @param $alldata Array
2015          * @return Bool
2016          */
2017         public function validate( $value, $alldata ){
2018                 return true;
2019         }
2020 }
2021
2022 class HTMLEditTools extends HTMLFormField {
2023         public function getInputHTML( $value ) {
2024                 return '';
2025         }
2026
2027         public function getTableRow( $value ) {
2028                 if ( empty( $this->mParams['message'] ) ) {
2029                         $msg = wfMessage( 'edittools' );
2030                 } else {
2031                         $msg = wfMessage( $this->mParams['message'] );
2032                         if ( $msg->isDisabled() ) {
2033                                 $msg = wfMessage( 'edittools' );
2034                         }
2035                 }
2036                 $msg->inContentLanguage();
2037
2038
2039                 return '<tr><td></td><td class="mw-input">'
2040                         . '<div class="mw-editTools">'
2041                         . $msg->parseAsBlock()
2042                         . "</div></td></tr>\n";
2043         }
2044 }