includes/htmlform/HTMLForm.php

   1 <?php
   2
   3 /**
   4  * HTML form generation and submission handling.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19  * http://www.gnu.org/copyleft/gpl.html
  20  *
  21  * @file
  22  */
  23
  24 /**
  25  * Object handling generic submission, CSRF protection, layout and
  26  * other logic for UI forms. in a reusable manner.
  27  *
  28  * In order to generate the form, the HTMLForm object takes an array
  29  * structure detailing the form fields available. Each element of the
  30  * array is a basic property-list, including the type of field, the
  31  * label it is to be given in the form, callbacks for validation and
  32  * 'filtering', and other pertinent information.
  33  *
  34  * Field types are implemented as subclasses of the generic HTMLFormField
  35  * object, and typically implement at least getInputHTML, which generates
  36  * the HTML for the input field to be placed in the table.
  37  *
  38  * You can find extensive documentation on the www.mediawiki.org wiki:
  39  *  - https://www.mediawiki.org/wiki/HTMLForm
  40  *  - https://www.mediawiki.org/wiki/HTMLForm/tutorial
  41  *
  42  * The constructor input is an associative array of $fieldname => $info,
  43  * where $info is an Associative Array with any of the following:
  44  *
  45  *    'class'               -- the subclass of HTMLFormField that will be used
  46  *                             to create the object.  *NOT* the CSS class!
  47  *    'type'                -- roughly translates into the <select> type attribute.
  48  *                             if 'class' is not specified, this is used as a map
  49  *                             through HTMLForm::$typeMappings to get the class name.
  50  *    'default'             -- default value when the form is displayed
  51  *    'id'                  -- HTML id attribute
  52  *    'cssclass'            -- CSS class
  53  *    'csshelpclass'        -- CSS class used to style help text
  54  *    'dir'                 -- Direction of the element.
  55  *    'options'             -- associative array mapping labels to values.
  56  *                             Some field types support multi-level arrays.
  57  *    'options-messages'    -- associative array mapping message keys to values.
  58  *                             Some field types support multi-level arrays.
  59  *    'options-message'     -- message key or object to be parsed to extract the list of
  60  *                             options (like 'ipbreason-dropdown').
  61  *    'label-message'       -- message key or object for a message to use as the label.
  62  *                             can be an array of msg key and then parameters to
  63  *                             the message.
  64  *    'label'               -- alternatively, a raw text message. Overridden by
  65  *                             label-message
  66  *    'help'                -- message text for a message to use as a help text.
  67  *    'help-message'        -- message key or object for a message to use as a help text.
  68  *                             can be an array of msg key and then parameters to
  69  *                             the message.
  70  *                             Overwrites 'help-messages' and 'help'.
  71  *    'help-messages'       -- array of message keys/objects. As above, each item can
  72  *                             be an array of msg key and then parameters.
  73  *                             Overwrites 'help'.
  74  *    'notice'              -- message text for a message to use as a notice in the field.
  75  *                             Currently used by OOUI form fields only.
  76  *    'notice-messages'     -- array of message keys/objects to use for notice.
  77  *                             Overrides 'notice'.
  78  *    'notice-message'      -- message key or object to use as a notice.
  79  *    'required'            -- passed through to the object, indicating that it
  80  *                             is a required field.
  81  *    'size'                -- the length of text fields
  82  *    'filter-callback'     -- a function name to give you the chance to
  83  *                             massage the inputted value before it's processed.
  84  *                             @see HTMLFormField::filter()
  85  *    'validation-callback' -- a function name to give you the chance
  86  *                             to impose extra validation on the field input.
  87  *                             @see HTMLFormField::validate()
  88  *    'name'                -- By default, the 'name' attribute of the input field
  89  *                             is "wp{$fieldname}".  If you want a different name
  90  *                             (eg one without the "wp" prefix), specify it here and
  91  *                             it will be used without modification.
  92  *    'hide-if'             -- expression given as an array stating when the field
  93  *                             should be hidden. The first array value has to be the
  94  *                             expression's logic operator. Supported expressions:
  95  *                               'NOT'
  96  *                                 [ 'NOT', array $expression ]
  97  *                                 To hide a field if a given expression is not true.
  98  *                               '==='
  99  *                                 [ '===', string $fieldName, string $value ]
 100  *                                 To hide a field if another field identified by
 101  *                                 $field has the value $value.
 102  *                               '!=='
 103  *                                 [ '!==', string $fieldName, string $value ]
 104  *                                 Same as [ 'NOT', [ '===', $fieldName, $value ]
 105  *                               'OR', 'AND', 'NOR', 'NAND'
 106  *                                 [ 'XXX', array $expression1, ..., array $expressionN ]
 107  *                                 To hide a field if one or more (OR), all (AND),
 108  *                                 neither (NOR) or not all (NAND) given expressions
 109  *                                 are evaluated as true.
 110  *                             The expressions will be given to a JavaScript frontend
 111  *                             module which will continually update the field's
 112  *                             visibility.
 113  *
 114  * Since 1.20, you can chain mutators to ease the form generation:
 115  * @par Example:
 116  * @code
 117  * $form = new HTMLForm( $someFields );
 118  * $form->setMethod( 'get' )
 119  *      ->setWrapperLegendMsg( 'message-key' )
 120  *      ->prepareForm()
 121  *      ->displayForm( '' );
 122  * @endcode
 123  * Note that you will have prepareForm and displayForm at the end. Other
 124  * methods call done after that would simply not be part of the form :(
 125  *
 126  * @todo Document 'section' / 'subsection' stuff
 127  */
 128 class HTMLForm extends ContextSource {
 129         // A mapping of 'type' inputs onto standard HTMLFormField subclasses
 130         public static $typeMappings = [
 131                 'api' => 'HTMLApiField',
 132                 'text' => 'HTMLTextField',
 133                 'textwithbutton' => 'HTMLTextFieldWithButton',
 134                 'textarea' => 'HTMLTextAreaField',
 135                 'select' => 'HTMLSelectField',
 136                 'combobox' => 'HTMLComboboxField',
 137                 'radio' => 'HTMLRadioField',
 138                 'multiselect' => 'HTMLMultiSelectField',
 139                 'limitselect' => 'HTMLSelectLimitField',
 140                 'check' => 'HTMLCheckField',
 141                 'toggle' => 'HTMLCheckField',
 142                 'int' => 'HTMLIntField',
 143                 'float' => 'HTMLFloatField',
 144                 'info' => 'HTMLInfoField',
 145                 'selectorother' => 'HTMLSelectOrOtherField',
 146                 'selectandother' => 'HTMLSelectAndOtherField',
 147                 'namespaceselect' => 'HTMLSelectNamespace',
 148                 'namespaceselectwithbutton' => 'HTMLSelectNamespaceWithButton',
 149                 'tagfilter' => 'HTMLTagFilter',
 150                 'sizefilter' => 'HTMLSizeFilterField',
 151                 'submit' => 'HTMLSubmitField',
 152                 'hidden' => 'HTMLHiddenField',
 153                 'edittools' => 'HTMLEditTools',
 154                 'checkmatrix' => 'HTMLCheckMatrix',
 155                 'cloner' => 'HTMLFormFieldCloner',
 156                 'autocompleteselect' => 'HTMLAutoCompleteSelectField',
 157                 'date' => 'HTMLDateTimeField',
 158                 'time' => 'HTMLDateTimeField',
 159                 'datetime' => 'HTMLDateTimeField',
 160                 // HTMLTextField will output the correct type="" attribute automagically.
 161                 // There are about four zillion other HTML5 input types, like range, but
 162                 // we don't use those at the moment, so no point in adding all of them.
 163                 'email' => 'HTMLTextField',
 164                 'password' => 'HTMLTextField',
 165                 'url' => 'HTMLTextField',
 166                 'title' => 'HTMLTitleTextField',
 167                 'user' => 'HTMLUserTextField',
 168                 'usersmultiselect' => 'HTMLUsersMultiselectField',
 169         ];
 170
 171         public $mFieldData;
 172
 173         protected $mMessagePrefix;
 174
 175         /** @var HTMLFormField[] */
 176         protected $mFlatFields;
 177
 178         protected $mFieldTree;
 179         protected $mShowReset = false;
 180         protected $mShowSubmit = true;
 181         protected $mSubmitFlags = [ 'primary', 'progressive' ];
 182         protected $mShowCancel = false;
 183         protected $mCancelTarget;
 184
 185         protected $mSubmitCallback;
 186         protected $mValidationErrorMessage;
 187
 188         protected $mPre = '';
 189         protected $mHeader = '';
 190         protected $mFooter = '';
 191         protected $mSectionHeaders = [];
 192         protected $mSectionFooters = [];
 193         protected $mPost = '';
 194         protected $mId;
 195         protected $mName;
 196         protected $mTableId = '';
 197
 198         protected $mSubmitID;
 199         protected $mSubmitName;
 200         protected $mSubmitText;
 201         protected $mSubmitTooltip;
 202
 203         protected $mFormIdentifier;
 204         protected $mTitle;
 205         protected $mMethod = 'post';
 206         protected $mWasSubmitted = false;
 207
 208         /**
 209          * Form action URL. false means we will use the URL to set Title
 210          * @since 1.19
 211          * @var bool|string
 212          */
 213         protected $mAction = false;
 214
 215         /**
 216          * Form attribute autocomplete. false does not set the attribute
 217          * @since 1.27
 218          * @var bool|string
 219          */
 220         protected $mAutocomplete = false;
 221
 222         protected $mUseMultipart = false;
 223         protected $mHiddenFields = [];
 224         protected $mButtons = [];
 225
 226         protected $mWrapperLegend = false;
 227
 228         /**
 229          * Salt for the edit token.
 230          * @var string|array
 231          */
 232         protected $mTokenSalt = '';
 233
 234         /**
 235          * If true, sections that contain both fields and subsections will
 236          * render their subsections before their fields.
 237          *
 238          * Subclasses may set this to false to render subsections after fields
 239          * instead.
 240          */
 241         protected $mSubSectionBeforeFields = true;
 242
 243         /**
 244          * Format in which to display form. For viable options,
 245          * @see $availableDisplayFormats
 246          * @var string
 247          */
 248         protected $displayFormat = 'table';
 249
 250         /**
 251          * Available formats in which to display the form
 252          * @var array
 253          */
 254         protected $availableDisplayFormats = [
 255                 'table',
 256                 'div',
 257                 'raw',
 258                 'inline',
 259         ];
 260
 261         /**
 262          * Available formats in which to display the form
 263          * @var array
 264          */
 265         protected $availableSubclassDisplayFormats = [
 266                 'vform',
 267                 'ooui',
 268         ];
 269
 270         /**
 271          * Construct a HTMLForm object for given display type. May return a HTMLForm subclass.
 272          *
 273          * @param string $displayFormat
 274          * @param mixed $arguments... Additional arguments to pass to the constructor.
 275          * @return HTMLForm
 276          */
 277         public static function factory( $displayFormat/*, $arguments...*/ ) {
 278                 $arguments = func_get_args();
 279                 array_shift( $arguments );
 280
 281                 switch ( $displayFormat ) {
 282                         case 'vform':
 283                                 return ObjectFactory::constructClassInstance( VFormHTMLForm::class, $arguments );
 284                         case 'ooui':
 285                                 return ObjectFactory::constructClassInstance( OOUIHTMLForm::class, $arguments );
 286                         default:
 287                                 /** @var HTMLForm $form */
 288                                 $form = ObjectFactory::constructClassInstance( self::class, $arguments );
 289                                 $form->setDisplayFormat( $displayFormat );
 290                                 return $form;
 291                 }
 292         }
 293
 294         /**
 295          * Build a new HTMLForm from an array of field attributes
 296          *
 297          * @param array $descriptor Array of Field constructs, as described above
 298          * @param IContextSource $context Available since 1.18, will become compulsory in 1.18.
 299          *     Obviates the need to call $form->setTitle()
 300          * @param string $messagePrefix A prefix to go in front of default messages
 301          */
 302         public function __construct( $descriptor, /*IContextSource*/ $context = null,
 303                 $messagePrefix = ''
 304         ) {
 305                 if ( $context instanceof IContextSource ) {
 306                         $this->setContext( $context );
 307                         $this->mTitle = false; // We don't need them to set a title
 308                         $this->mMessagePrefix = $messagePrefix;
 309                 } elseif ( $context === null && $messagePrefix !== '' ) {
 310                         $this->mMessagePrefix = $messagePrefix;
 311                 } elseif ( is_string( $context ) && $messagePrefix === '' ) {
 312                         // B/C since 1.18
 313                         // it's actually $messagePrefix
 314                         $this->mMessagePrefix = $context;
 315                 }
 316
 317                 // Evil hack for mobile :(
 318                 if (
 319                         !$this->getConfig()->get( 'HTMLFormAllowTableFormat' )
 320                         && $this->displayFormat === 'table'
 321                 ) {
 322                         $this->displayFormat = 'div';
 323                 }
 324
 325                 // Expand out into a tree.
 326                 $loadedDescriptor = [];
 327                 $this->mFlatFields = [];
 328
 329                 foreach ( $descriptor as $fieldname => $info ) {
 330                         $section = isset( $info['section'] )
 331                                 ? $info['section']
 332                                 : '';
 333
 334                         if ( isset( $info['type'] ) && $info['type'] === 'file' ) {
 335                                 $this->mUseMultipart = true;
 336                         }
 337
 338                         $field = static::loadInputFromParameters( $fieldname, $info, $this );
 339
 340                         $setSection =& $loadedDescriptor;
 341                         if ( $section ) {
 342                                 $sectionParts = explode( '/', $section );
 343
 344                                 while ( count( $sectionParts ) ) {
 345                                         $newName = array_shift( $sectionParts );
 346
 347                                         if ( !isset( $setSection[$newName] ) ) {
 348                                                 $setSection[$newName] = [];
 349                                         }
 350
 351                                         $setSection =& $setSection[$newName];
 352                                 }
 353                         }
 354
 355                         $setSection[$fieldname] = $field;
 356                         $this->mFlatFields[$fieldname] = $field;
 357                 }
 358
 359                 $this->mFieldTree = $loadedDescriptor;
 360         }
 361
 362         /**
 363          * @param string $fieldname
 364          * @return bool
 365          */
 366         public function hasField( $fieldname ) {
 367                 return isset( $this->mFlatFields[$fieldname] );
 368         }
 369
 370         /**
 371          * @param string $fieldname
 372          * @return HTMLFormField
 373          * @throws DomainException on invalid field name
 374          */
 375         public function getField( $fieldname ) {
 376                 if ( !$this->hasField( $fieldname ) ) {
 377                         throw new DomainException( __METHOD__ . ': no field named ' . $fieldname );
 378                 }
 379                 return $this->mFlatFields[$fieldname];
 380         }
 381
 382         /**
 383          * Set format in which to display the form
 384          *
 385          * @param string $format The name of the format to use, must be one of
 386          *   $this->availableDisplayFormats
 387          *
 388          * @throws MWException
 389          * @since 1.20
 390          * @return HTMLForm $this for chaining calls (since 1.20)
 391          */
 392         public function setDisplayFormat( $format ) {
 393                 if (
 394                         in_array( $format, $this->availableSubclassDisplayFormats, true ) ||
 395                         in_array( $this->displayFormat, $this->availableSubclassDisplayFormats, true )
 396                 ) {
 397                         throw new MWException( 'Cannot change display format after creation, ' .
 398                                 'use HTMLForm::factory() instead' );
 399                 }
 400
 401                 if ( !in_array( $format, $this->availableDisplayFormats, true ) ) {
 402                         throw new MWException( 'Display format must be one of ' .
 403                                 print_r(
 404                                         array_merge(
 405                                                 $this->availableDisplayFormats,
 406                                                 $this->availableSubclassDisplayFormats
 407                                         ),
 408                                         true
 409                                 ) );
 410                 }
 411
 412                 // Evil hack for mobile :(
 413                 if ( !$this->getConfig()->get( 'HTMLFormAllowTableFormat' ) && $format === 'table' ) {
 414                         $format = 'div';
 415                 }
 416
 417                 $this->displayFormat = $format;
 418
 419                 return $this;
 420         }
 421
 422         /**
 423          * Getter for displayFormat
 424          * @since 1.20
 425          * @return string
 426          */
 427         public function getDisplayFormat() {
 428                 return $this->displayFormat;
 429         }
 430
 431         /**
 432          * Test if displayFormat is 'vform'
 433          * @since 1.22
 434          * @deprecated since 1.25
 435          * @return bool
 436          */
 437         public function isVForm() {
 438                 wfDeprecated( __METHOD__, '1.25' );
 439                 return false;
 440         }
 441
 442         /**
 443          * Get the HTMLFormField subclass for this descriptor.
 444          *
 445          * The descriptor can be passed either 'class' which is the name of
 446          * a HTMLFormField subclass, or a shorter 'type' which is an alias.
 447          * This makes sure the 'class' is always set, and also is returned by
 448          * this function for ease.
 449          *
 450          * @since 1.23
 451          *
 452          * @param string $fieldname Name of the field
 453          * @param array $descriptor Input Descriptor, as described above
 454          *
 455          * @throws MWException
 456          * @return string Name of a HTMLFormField subclass
 457          */
 458         public static function getClassFromDescriptor( $fieldname, &$descriptor ) {
 459                 if ( isset( $descriptor['class'] ) ) {
 460                         $class = $descriptor['class'];
 461                 } elseif ( isset( $descriptor['type'] ) ) {
 462                         $class = static::$typeMappings[$descriptor['type']];
 463                         $descriptor['class'] = $class;
 464                 } else {
 465                         $class = null;
 466                 }
 467
 468                 if ( !$class ) {
 469                         throw new MWException( "Descriptor with no class for $fieldname: "
 470                                 . print_r( $descriptor, true ) );
 471                 }
 472
 473                 return $class;
 474         }
 475
 476         /**
 477          * Initialise a new Object for the field
 478          *
 479          * @param string $fieldname Name of the field
 480          * @param array $descriptor Input Descriptor, as described above
 481          * @param HTMLForm|null $parent Parent instance of HTMLForm
 482          *
 483          * @throws MWException
 484          * @return HTMLFormField Instance of a subclass of HTMLFormField
 485          */
 486         public static function loadInputFromParameters( $fieldname, $descriptor,
 487                 HTMLForm $parent = null
 488         ) {
 489                 $class = static::getClassFromDescriptor( $fieldname, $descriptor );
 490
 491                 $descriptor['fieldname'] = $fieldname;
 492                 if ( $parent ) {
 493                         $descriptor['parent'] = $parent;
 494                 }
 495
 496                 # @todo This will throw a fatal error whenever someone try to use
 497                 # 'class' to feed a CSS class instead of 'cssclass'. Would be
 498                 # great to avoid the fatal error and show a nice error.
 499                 return new $class( $descriptor );
 500         }
 501
 502         /**
 503          * Prepare form for submission.
 504          *
 505          * @attention When doing method chaining, that should be the very last
 506          * method call before displayForm().
 507          *
 508          * @throws MWException
 509          * @return HTMLForm $this for chaining calls (since 1.20)
 510          */
 511         public function prepareForm() {
 512                 # Check if we have the info we need
 513                 if ( !$this->mTitle instanceof Title && $this->mTitle !== false ) {
 514                         throw new MWException( 'You must call setTitle() on an HTMLForm' );
 515                 }
 516
 517                 # Load data from the request.
 518                 if (
 519                         $this->mFormIdentifier === null ||
 520                         $this->getRequest()->getVal( 'wpFormIdentifier' ) === $this->mFormIdentifier
 521                 ) {
 522                         $this->loadData();
 523                 } else {
 524                         $this->mFieldData = [];
 525                 }
 526
 527                 return $this;
 528         }
 529
 530         /**
 531          * Try submitting, with edit token check first
 532          * @return Status|bool
 533          */
 534         public function tryAuthorizedSubmit() {
 535                 $result = false;
 536
 537                 $identOkay = false;
 538                 if ( $this->mFormIdentifier === null ) {
 539                         $identOkay = true;
 540                 } else {
 541                         $identOkay = $this->getRequest()->getVal( 'wpFormIdentifier' ) === $this->mFormIdentifier;
 542                 }
 543
 544                 $tokenOkay = false;
 545                 if ( $this->getMethod() !== 'post' ) {
 546                         $tokenOkay = true; // no session check needed
 547                 } elseif ( $this->getRequest()->wasPosted() ) {
 548                         $editToken = $this->getRequest()->getVal( 'wpEditToken' );
 549                         if ( $this->getUser()->isLoggedIn() || $editToken !== null ) {
 550                                 // Session tokens for logged-out users have no security value.
 551                                 // However, if the user gave one, check it in order to give a nice
 552                                 // "session expired" error instead of "permission denied" or such.
 553                                 $tokenOkay = $this->getUser()->matchEditToken( $editToken, $this->mTokenSalt );
 554                         } else {
 555                                 $tokenOkay = true;
 556                         }
 557                 }
 558
 559                 if ( $tokenOkay && $identOkay ) {
 560                         $this->mWasSubmitted = true;
 561                         $result = $this->trySubmit();
 562                 }
 563
 564                 return $result;
 565         }
 566
 567         /**
 568          * The here's-one-I-made-earlier option: do the submission if
 569          * posted, or display the form with or without funky validation
 570          * errors
 571          * @return bool|Status Whether submission was successful.
 572          */
 573         public function show() {
 574                 $this->prepareForm();
 575
 576                 $result = $this->tryAuthorizedSubmit();
 577                 if ( $result === true || ( $result instanceof Status && $result->isGood() ) ) {
 578                         return $result;
 579                 }
 580
 581                 $this->displayForm( $result );
 582
 583                 return false;
 584         }
 585
 586         /**
 587          * Same as self::show with the difference, that the form will be
 588          * added to the output, no matter, if the validation was good or not.
 589          * @return bool|Status Whether submission was successful.
 590          */
 591         public function showAlways() {
 592                 $this->prepareForm();
 593
 594                 $result = $this->tryAuthorizedSubmit();
 595
 596                 $this->displayForm( $result );
 597
 598                 return $result;
 599         }
 600
 601         /**
 602          * Validate all the fields, and call the submission callback
 603          * function if everything is kosher.
 604          * @throws MWException
 605          * @return bool|string|array|Status
 606          *     - Bool true or a good Status object indicates success,
 607          *     - Bool false indicates no submission was attempted,
 608          *     - Anything else indicates failure. The value may be a fatal Status
 609          *       object, an HTML string, or an array of arrays (message keys and
 610          *       params) or strings (message keys)
 611          */
 612         public function trySubmit() {
 613                 $valid = true;
 614                 $hoistedErrors = Status::newGood();
 615                 if ( $this->mValidationErrorMessage ) {
 616                         foreach ( (array)$this->mValidationErrorMessage as $error ) {
 617                                 call_user_func_array( [ $hoistedErrors, 'fatal' ], $error );
 618                         }
 619                 } else {
 620                         $hoistedErrors->fatal( 'htmlform-invalid-input' );
 621                 }
 622
 623                 $this->mWasSubmitted = true;
 624
 625                 # Check for cancelled submission
 626                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 627                         if ( !array_key_exists( $fieldname, $this->mFieldData ) ) {
 628                                 continue;
 629                         }
 630                         if ( $field->cancelSubmit( $this->mFieldData[$fieldname], $this->mFieldData ) ) {
 631                                 $this->mWasSubmitted = false;
 632                                 return false;
 633                         }
 634                 }
 635
 636                 # Check for validation
 637                 foreach ( $this->mFlatFields as $fieldname => $field ) {
 638                         if ( !array_key_exists( $fieldname, $this->mFieldData ) ) {
 639                                 continue;
 640                         }
 641                         if ( $field->isHidden( $this->mFieldData ) ) {
 642                                 continue;
 643                         }
 644                         $res = $field->validate( $this->mFieldData[$fieldname], $this->mFieldData );
 645                         if ( $res !== true ) {
 646                                 $valid = false;
 647                                 if ( $res !== false && !$field->canDisplayErrors() ) {
 648                                         if ( is_string( $res ) ) {
 649                                                 $hoistedErrors->fatal( 'rawmessage', $res );
 650                                         } else {
 651                                                 $hoistedErrors->fatal( $res );
 652                                         }
 653                                 }
 654                         }
 655                 }
 656
 657                 if ( !$valid ) {
 658                         return $hoistedErrors;
 659                 }
 660
 661                 $callback = $this->mSubmitCallback;
 662                 if ( !is_callable( $callback ) ) {
 663                         throw new MWException( 'HTMLForm: no submit callback provided. Use ' .
 664                                 'setSubmitCallback() to set one.' );
 665                 }
 666
 667                 $data = $this->filterDataForSubmit( $this->mFieldData );
 668
 669                 $res = call_user_func( $callback, $data, $this );
 670                 if ( $res === false ) {
 671                         $this->mWasSubmitted = false;
 672                 }
 673
 674                 return $res;
 675         }
 676
 677         /**
 678          * Test whether the form was considered to have been submitted or not, i.e.
 679          * whether the last call to tryAuthorizedSubmit or trySubmit returned
 680          * non-false.
 681          *
 682          * This will return false until HTMLForm::tryAuthorizedSubmit or
 683          * HTMLForm::trySubmit is called.
 684          *
 685          * @since 1.23
 686          * @return bool
 687          */
 688         public function wasSubmitted() {
 689                 return $this->mWasSubmitted;
 690         }
 691
 692         /**
 693          * Set a callback to a function to do something with the form
 694          * once it's been successfully validated.
 695          *
 696          * @param callable $cb The function will be passed the output from
 697          *   HTMLForm::filterDataForSubmit and this HTMLForm object, and must
 698          *   return as documented for HTMLForm::trySubmit
 699          *
 700          * @return HTMLForm $this for chaining calls (since 1.20)
 701          */
 702         public function setSubmitCallback( $cb ) {
 703                 $this->mSubmitCallback = $cb;
 704
 705                 return $this;
 706         }
 707
 708         /**
 709          * Set a message to display on a validation error.
 710          *
 711          * @param string|array $msg String or Array of valid inputs to wfMessage()
 712          *     (so each entry can be either a String or Array)
 713          *
 714          * @return HTMLForm $this for chaining calls (since 1.20)
 715          */
 716         public function setValidationErrorMessage( $msg ) {
 717                 $this->mValidationErrorMessage = $msg;
 718
 719                 return $this;
 720         }
 721
 722         /**
 723          * Set the introductory message, overwriting any existing message.
 724          *
 725          * @param string $msg Complete text of message to display
 726          *
 727          * @return HTMLForm $this for chaining calls (since 1.20)
 728          */
 729         public function setIntro( $msg ) {
 730                 $this->setPreText( $msg );
 731
 732                 return $this;
 733         }
 734
 735         /**
 736          * Set the introductory message HTML, overwriting any existing message.
 737          * @since 1.19
 738          *
 739          * @param string $msg Complete HTML of message to display
 740          *
 741          * @return HTMLForm $this for chaining calls (since 1.20)
 742          */
 743         public function setPreText( $msg ) {
 744                 $this->mPre = $msg;
 745
 746                 return $this;
 747         }
 748
 749         /**
 750          * Add HTML to introductory message.
 751          *
 752          * @param string $msg Complete HTML of message to display
 753          *
 754          * @return HTMLForm $this for chaining calls (since 1.20)
 755          */
 756         public function addPreText( $msg ) {
 757                 $this->mPre .= $msg;
 758
 759                 return $this;
 760         }
 761
 762         /**
 763          * Add HTML to the header, inside the form.
 764          *
 765          * @param string $msg Additional HTML to display in header
 766          * @param string|null $section The section to add the header to
 767          *
 768          * @return HTMLForm $this for chaining calls (since 1.20)
 769          */
 770         public function addHeaderText( $msg, $section = null ) {
 771                 if ( $section === null ) {
 772                         $this->mHeader .= $msg;
 773                 } else {
 774                         if ( !isset( $this->mSectionHeaders[$section] ) ) {
 775                                 $this->mSectionHeaders[$section] = '';
 776                         }
 777                         $this->mSectionHeaders[$section] .= $msg;
 778                 }
 779
 780                 return $this;
 781         }
 782
 783         /**
 784          * Set header text, inside the form.
 785          * @since 1.19
 786          *
 787          * @param string $msg Complete HTML of header to display
 788          * @param string|null $section The section to add the header to
 789          *
 790          * @return HTMLForm $this for chaining calls (since 1.20)
 791          */
 792         public function setHeaderText( $msg, $section = null ) {
 793                 if ( $section === null ) {
 794                         $this->mHeader = $msg;
 795                 } else {
 796                         $this->mSectionHeaders[$section] = $msg;
 797                 }
 798
 799                 return $this;
 800         }
 801
 802         /**
 803          * Get header text.
 804          *
 805          * @param string|null $section The section to get the header text for
 806          * @since 1.26
 807          * @return string HTML
 808          */
 809         public function getHeaderText( $section = null ) {
 810                 if ( $section === null ) {
 811                         return $this->mHeader;
 812                 } else {
 813                         return isset( $this->mSectionHeaders[$section] ) ? $this->mSectionHeaders[$section] : '';
 814                 }
 815         }
 816
 817         /**
 818          * Add footer text, inside the form.
 819          *
 820          * @param string $msg Complete text of message to display
 821          * @param string|null $section The section to add the footer text to
 822          *
 823          * @return HTMLForm $this for chaining calls (since 1.20)
 824          */
 825         public function addFooterText( $msg, $section = null ) {
 826                 if ( $section === null ) {
 827                         $this->mFooter .= $msg;
 828                 } else {
 829                         if ( !isset( $this->mSectionFooters[$section] ) ) {
 830                                 $this->mSectionFooters[$section] = '';
 831                         }
 832                         $this->mSectionFooters[$section] .= $msg;
 833                 }
 834
 835                 return $this;
 836         }
 837
 838         /**
 839          * Set footer text, inside the form.
 840          * @since 1.19
 841          *
 842          * @param string $msg Complete text of message to display
 843          * @param string|null $section The section to add the footer text to
 844          *
 845          * @return HTMLForm $this for chaining calls (since 1.20)
 846          */
 847         public function setFooterText( $msg, $section = null ) {
 848                 if ( $section === null ) {
 849                         $this->mFooter = $msg;
 850                 } else {
 851                         $this->mSectionFooters[$section] = $msg;
 852                 }
 853
 854                 return $this;
 855         }
 856
 857         /**
 858          * Get footer text.
 859          *
 860          * @param string|null $section The section to get the footer text for
 861          * @since 1.26
 862          * @return string
 863          */
 864         public function getFooterText( $section = null ) {
 865                 if ( $section === null ) {
 866                         return $this->mFooter;
 867                 } else {
 868                         return isset( $this->mSectionFooters[$section] ) ? $this->mSectionFooters[$section] : '';
 869                 }
 870         }
 871
 872         /**
 873          * Add text to the end of the display.
 874          *
 875          * @param string $msg Complete text of message to display
 876          *
 877          * @return HTMLForm $this for chaining calls (since 1.20)
 878          */
 879         public function addPostText( $msg ) {
 880                 $this->mPost .= $msg;
 881
 882                 return $this;
 883         }
 884
 885         /**
 886          * Set text at the end of the display.
 887          *
 888          * @param string $msg Complete text of message to display
 889          *
 890          * @return HTMLForm $this for chaining calls (since 1.20)
 891          */
 892         public function setPostText( $msg ) {
 893                 $this->mPost = $msg;
 894
 895                 return $this;
 896         }
 897
 898         /**
 899          * Add a hidden field to the output
 900          *
 901          * @param string $name Field name.  This will be used exactly as entered
 902          * @param string $value Field value
 903          * @param array $attribs
 904          *
 905          * @return HTMLForm $this for chaining calls (since 1.20)
 906          */
 907         public function addHiddenField( $name, $value, array $attribs = [] ) {
 908                 $attribs += [ 'name' => $name ];
 909                 $this->mHiddenFields[] = [ $value, $attribs ];
 910
 911                 return $this;
 912         }
 913
 914         /**
 915          * Add an array of hidden fields to the output
 916          *
 917          * @since 1.22
 918          *
 919          * @param array $fields Associative array of fields to add;
 920          *        mapping names to their values
 921          *
 922          * @return HTMLForm $this for chaining calls
 923          */
 924         public function addHiddenFields( array $fields ) {
 925                 foreach ( $fields as $name => $value ) {
 926                         $this->mHiddenFields[] = [ $value, [ 'name' => $name ] ];
 927                 }
 928
 929                 return $this;
 930         }
 931
 932         /**
 933          * Add a button to the form
 934          *
 935          * @since 1.27 takes an array as shown. Earlier versions accepted
 936          *  'name', 'value', 'id', and 'attribs' as separate parameters in that
 937          *  order.
 938          * @note Custom labels ('label', 'label-message', 'label-raw') are not
 939          *  supported for IE6 and IE7 due to bugs in those browsers. If detected,
 940          *  they will be served buttons using 'value' as the button label.
 941          * @param array $data Data to define the button:
 942          *  - name: (string) Button name.
 943          *  - value: (string) Button value.
 944          *  - label-message: (string, optional) Button label message key to use
 945          *    instead of 'value'. Overrides 'label' and 'label-raw'.
 946          *  - label: (string, optional) Button label text to use instead of
 947          *    'value'. Overrides 'label-raw'.
 948          *  - label-raw: (string, optional) Button label HTML to use instead of
 949          *    'value'.
 950          *  - id: (string, optional) DOM id for the button.
 951          *  - attribs: (array, optional) Additional HTML attributes.
 952          *  - flags: (string|string[], optional) OOUI flags.
 953          *  - framed: (boolean=true, optional) OOUI framed attribute.
 954          * @return HTMLForm $this for chaining calls (since 1.20)
 955          */
 956         public function addButton( $data ) {
 957                 if ( !is_array( $data ) ) {
 958                         $args = func_get_args();
 959                         if ( count( $args ) < 2 || count( $args ) > 4 ) {
 960                                 throw new InvalidArgumentException(
 961                                         'Incorrect number of arguments for deprecated calling style'
 962                                 );
 963                         }
 964                         $data = [
 965                                 'name' => $args[0],
 966                                 'value' => $args[1],
 967                                 'id' => isset( $args[2] ) ? $args[2] : null,
 968                                 'attribs' => isset( $args[3] ) ? $args[3] : null,
 969                         ];
 970                 } else {
 971                         if ( !isset( $data['name'] ) ) {
 972                                 throw new InvalidArgumentException( 'A name is required' );
 973                         }
 974                         if ( !isset( $data['value'] ) ) {
 975                                 throw new InvalidArgumentException( 'A value is required' );
 976                         }
 977                 }
 978                 $this->mButtons[] = $data + [
 979                         'id' => null,
 980                         'attribs' => null,
 981                         'flags' => null,
 982                         'framed' => true,
 983                 ];
 984
 985                 return $this;
 986         }
 987
 988         /**
 989          * Set the salt for the edit token.
 990          *
 991          * Only useful when the method is "post".
 992          *
 993          * @since 1.24
 994          * @param string|array $salt Salt to use
 995          * @return HTMLForm $this For chaining calls
 996          */
 997         public function setTokenSalt( $salt ) {
 998                 $this->mTokenSalt = $salt;
 999
1000                 return $this;
1001         }
1002
1003         /**
1004          * Display the form (sending to the context's OutputPage object), with an
1005          * appropriate error message or stack of messages, and any validation errors, etc.
1006          *
1007          * @attention You should call prepareForm() before calling this function.
1008          * Moreover, when doing method chaining this should be the very last method
1009          * call just after prepareForm().
1010          *
1011          * @param bool|string|array|Status $submitResult Output from HTMLForm::trySubmit()
1012          *
1013          * @return void Nothing, should be last call
1014          */
1015         public function displayForm( $submitResult ) {
1016                 $this->getOutput()->addHTML( $this->getHTML( $submitResult ) );
1017         }
1018
1019         /**
1020          * Returns the raw HTML generated by the form
1021          *
1022          * @param bool|string|array|Status $submitResult Output from HTMLForm::trySubmit()
1023          *
1024          * @return string HTML
1025          */
1026         public function getHTML( $submitResult ) {
1027                 # For good measure (it is the default)
1028                 $this->getOutput()->preventClickjacking();
1029                 $this->getOutput()->addModules( 'mediawiki.htmlform' );
1030                 $this->getOutput()->addModuleStyles( 'mediawiki.htmlform.styles' );
1031
1032                 $html = ''
1033                         . $this->getErrorsOrWarnings( $submitResult, 'error' )
1034                         . $this->getErrorsOrWarnings( $submitResult, 'warning' )
1035                         . $this->getHeaderText()
1036                         . $this->getBody()
1037                         . $this->getHiddenFields()
1038                         . $this->getButtons()
1039                         . $this->getFooterText();
1040
1041                 $html = $this->wrapForm( $html );
1042
1043                 return '' . $this->mPre . $html . $this->mPost;
1044         }
1045
1046         /**
1047          * Get HTML attributes for the `<form>` tag.
1048          * @return array
1049          */
1050         protected function getFormAttributes() {
1051                 # Use multipart/form-data
1052                 $encType = $this->mUseMultipart
1053                         ? 'multipart/form-data'
1054                         : 'application/x-www-form-urlencoded';
1055                 # Attributes
1056                 $attribs = [
1057                         'class' => 'mw-htmlform',
1058                         'action' => $this->getAction(),
1059                         'method' => $this->getMethod(),
1060                         'enctype' => $encType,
1061                 ];
1062                 if ( $this->mId ) {
1063                         $attribs['id'] = $this->mId;
1064                 }
1065                 if ( $this->mAutocomplete ) {
1066                         $attribs['autocomplete'] = $this->mAutocomplete;
1067                 }
1068                 if ( $this->mName ) {
1069                         $attribs['name'] = $this->mName;
1070                 }
1071                 if ( $this->needsJSForHtml5FormValidation() ) {
1072                         $attribs['novalidate'] = true;
1073                 }
1074                 return $attribs;
1075         }
1076
1077         /**
1078          * Wrap the form innards in an actual "<form>" element
1079          *
1080          * @param string $html HTML contents to wrap.
1081          *
1082          * @return string Wrapped HTML.
1083          */
1084         public function wrapForm( $html ) {
1085                 # Include a <fieldset> wrapper for style, if requested.
1086                 if ( $this->mWrapperLegend !== false ) {
1087                         $legend = is_string( $this->mWrapperLegend ) ? $this->mWrapperLegend : false;
1088                         $html = Xml::fieldset( $legend, $html );
1089                 }
1090
1091                 return Html::rawElement(
1092                         'form',
1093                         $this->getFormAttributes(),
1094                         $html
1095                 );
1096         }
1097
1098         /**
1099          * Get the hidden fields that should go inside the form.
1100          * @return string HTML.
1101          */
1102         public function getHiddenFields() {
1103                 $html = '';
1104                 if ( $this->mFormIdentifier !== null ) {
1105                         $html .= Html::hidden(
1106                                 'wpFormIdentifier',
1107                                 $this->mFormIdentifier
1108                         ) . "\n";
1109                 }
1110                 if ( $this->getMethod() === 'post' ) {
1111                         $html .= Html::hidden(
1112                                 'wpEditToken',
1113                                 $this->getUser()->getEditToken( $this->mTokenSalt ),
1114                                 [ 'id' => 'wpEditToken' ]
1115                         ) . "\n";
1116                         $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
1117                 }
1118
1119                 $articlePath = $this->getConfig()->get( 'ArticlePath' );
1120                 if ( strpos( $articlePath, '?' ) !== false && $this->getMethod() === 'get' ) {
1121                         $html .= Html::hidden( 'title', $this->getTitle()->getPrefixedText() ) . "\n";
1122                 }
1123
1124                 foreach ( $this->mHiddenFields as $data ) {
1125                         list( $value, $attribs ) = $data;
1126                         $html .= Html::hidden( $attribs['name'], $value, $attribs ) . "\n";
1127                 }
1128
1129                 return $html;
1130         }
1131
1132         /**
1133          * Get the submit and (potentially) reset buttons.
1134          * @return string HTML.
1135          */
1136         public function getButtons() {
1137                 $buttons = '';
1138                 $useMediaWikiUIEverywhere = $this->getConfig()->get( 'UseMediaWikiUIEverywhere' );
1139
1140                 if ( $this->mShowSubmit ) {
1141                         $attribs = [];
1142
1143                         if ( isset( $this->mSubmitID ) ) {
1144                                 $attribs['id'] = $this->mSubmitID;
1145                         }
1146
1147                         if ( isset( $this->mSubmitName ) ) {
1148                                 $attribs['name'] = $this->mSubmitName;
1149                         }
1150
1151                         if ( isset( $this->mSubmitTooltip ) ) {
1152                                 $attribs += Linker::tooltipAndAccesskeyAttribs( $this->mSubmitTooltip );
1153                         }
1154
1155                         $attribs['class'] = [ 'mw-htmlform-submit' ];
1156
1157                         if ( $useMediaWikiUIEverywhere ) {
1158                                 foreach ( $this->mSubmitFlags as $flag ) {
1159                                         $attribs['class'][] = 'mw-ui-' . $flag;
1160                                 }
1161                                 $attribs['class'][] = 'mw-ui-button';
1162                         }
1163
1164                         $buttons .= Xml::submitButton( $this->getSubmitText(), $attribs ) . "\n";
1165                 }
1166
1167                 if ( $this->mShowReset ) {
1168                         $buttons .= Html::element(
1169                                 'input',
1170                                 [
1171                                         'type' => 'reset',
1172                                         'value' => $this->msg( 'htmlform-reset' )->text(),
1173                                         'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button' : null,
1174                                 ]
1175                         ) . "\n";
1176                 }
1177
1178                 if ( $this->mShowCancel ) {
1179                         $target = $this->mCancelTarget ?: Title::newMainPage();
1180                         if ( $target instanceof Title ) {
1181                                 $target = $target->getLocalURL();
1182                         }
1183                         $buttons .= Html::element(
1184                                         'a',
1185                                         [
1186                                                 'class' => $useMediaWikiUIEverywhere ? 'mw-ui-button' : null,
1187                                                 'href' => $target,
1188                                         ],
1189                                         $this->msg( 'cancel' )->text()
1190                                 ) . "\n";
1191                 }
1192
1193                 // IE<8 has bugs with <button>, so we'll need to avoid them.
1194                 $isBadIE = preg_match( '/MSIE [1-7]\./i', $this->getRequest()->getHeader( 'User-Agent' ) );
1195
1196                 foreach ( $this->mButtons as $button ) {
1197                         $attrs = [
1198                                 'type' => 'submit',
1199                                 'name' => $button['name'],
1200                                 'value' => $button['value']
1201                         ];
1202
1203                         if ( isset( $button['label-message'] ) ) {
1204                                 $label = $this->getMessage( $button['label-message'] )->parse();
1205                         } elseif ( isset( $button['label'] ) ) {
1206                                 $label = htmlspecialchars( $button['label'] );
1207                         } elseif ( isset( $button['label-raw'] ) ) {
1208                                 $label = $button['label-raw'];
1209                         } else {
1210                                 $label = htmlspecialchars( $button['value'] );
1211                         }
1212
1213                         if ( $button['attribs'] ) {
1214                                 $attrs += $button['attribs'];
1215                         }
1216
1217                         if ( isset( $button['id'] ) ) {
1218                                 $attrs['id'] = $button['id'];
1219                         }
1220
1221                         if ( $useMediaWikiUIEverywhere ) {
1222                                 $attrs['class'] = isset( $attrs['class'] ) ? (array)$attrs['class'] : [];
1223                                 $attrs['class'][] = 'mw-ui-button';
1224                         }
1225
1226                         if ( $isBadIE ) {
1227                                 $buttons .= Html::element( 'input', $attrs ) . "\n";
1228                         } else {
1229                                 $buttons .= Html::rawElement( 'button', $attrs, $label ) . "\n";
1230                         }
1231                 }
1232
1233                 if ( !$buttons ) {
1234                         return '';
1235                 }
1236
1237                 return Html::rawElement( 'span',
1238                         [ 'class' => 'mw-htmlform-submit-buttons' ], "\n$buttons" ) . "\n";
1239         }
1240
1241         /**
1242          * Get the whole body of the form.
1243          * @return string
1244          */
1245         public function getBody() {
1246                 return $this->displaySection( $this->mFieldTree, $this->mTableId );
1247         }
1248
1249         /**
1250          * Format and display an error message stack.
1251          *
1252          * @param string|array|Status $errors
1253          *
1254          * @deprecated since 1.28, use getErrorsOrWarnings() instead
1255          *
1256          * @return string
1257          */
1258         public function getErrors( $errors ) {
1259                 wfDeprecated( __METHOD__ );
1260                 return $this->getErrorsOrWarnings( $errors, 'error' );
1261         }
1262
1263         /**
1264          * Returns a formatted list of errors or warnings from the given elements.
1265          *
1266          * @param string|array|Status $elements The set of errors/warnings to process.
1267          * @param string $elementsType Should warnings or errors be returned.  This is meant
1268          *     for Status objects, all other valid types are always considered as errors.
1269          * @return string
1270          */
1271         public function getErrorsOrWarnings( $elements, $elementsType ) {
1272                 if ( !in_array( $elementsType, [ 'error', 'warning' ], true ) ) {
1273                         throw new DomainException( $elementsType . ' is not a valid type.' );
1274                 }
1275                 $elementstr = false;
1276                 if ( $elements instanceof Status ) {
1277                         list( $errorStatus, $warningStatus ) = $elements->splitByErrorType();
1278                         $status = $elementsType === 'error' ? $errorStatus : $warningStatus;
1279                         if ( $status->isGood() ) {
1280                                 $elementstr = '';
1281                         } else {
1282                                 $elementstr = $this->getOutput()->parse(
1283                                         $status->getWikiText()
1284                                 );
1285                         }
1286                 } elseif ( is_array( $elements ) && $elementsType === 'error' ) {
1287                         $elementstr = $this->formatErrors( $elements );
1288                 } elseif ( $elementsType === 'error' ) {
1289                         $elementstr = $elements;
1290                 }
1291
1292                 return $elementstr
1293                         ? Html::rawElement( 'div', [ 'class' => $elementsType ], $elementstr )
1294                         : '';
1295         }
1296
1297         /**
1298          * Format a stack of error messages into a single HTML string
1299          *
1300          * @param array $errors Array of message keys/values
1301          *
1302          * @return string HTML, a "<ul>" list of errors
1303          */
1304         public function formatErrors( $errors ) {
1305                 $errorstr = '';
1306
1307                 foreach ( $errors as $error ) {
1308                         $errorstr .= Html::rawElement(
1309                                 'li',
1310                                 [],
1311                                 $this->getMessage( $error )->parse()
1312                         );
1313                 }
1314
1315                 $errorstr = Html::rawElement( 'ul', [], $errorstr );
1316
1317                 return $errorstr;
1318         }
1319
1320         /**
1321          * Set the text for the submit button
1322          *
1323          * @param string $t Plaintext
1324          *
1325          * @return HTMLForm $this for chaining calls (since 1.20)
1326          */
1327         public function setSubmitText( $t ) {
1328                 $this->mSubmitText = $t;
1329
1330                 return $this;
1331         }
1332
1333         /**
1334          * Identify that the submit button in the form has a destructive action
1335          * @since 1.24
1336          *
1337          * @return HTMLForm $this for chaining calls (since 1.28)
1338          */
1339         public function setSubmitDestructive() {
1340                 $this->mSubmitFlags = [ 'destructive', 'primary' ];
1341
1342                 return $this;
1343         }
1344
1345         /**
1346          * Identify that the submit button in the form has a progressive action
1347          * @since 1.25
1348          *
1349          * @return HTMLForm $this for chaining calls (since 1.28)
1350          */
1351         public function setSubmitProgressive() {
1352                 $this->mSubmitFlags = [ 'progressive', 'primary' ];
1353
1354                 return $this;
1355         }
1356
1357         /**
1358          * Set the text for the submit button to a message
1359          * @since 1.19
1360          *
1361          * @param string|Message $msg Message key or Message object
1362          *
1363          * @return HTMLForm $this for chaining calls (since 1.20)
1364          */
1365         public function setSubmitTextMsg( $msg ) {
1366                 if ( !$msg instanceof Message ) {
1367                         $msg = $this->msg( $msg );
1368                 }
1369                 $this->setSubmitText( $msg->text() );
1370
1371                 return $this;
1372         }
1373
1374         /**
1375          * Get the text for the submit button, either customised or a default.
1376          * @return string
1377          */
1378         public function getSubmitText() {
1379                 return $this->mSubmitText ?: $this->msg( 'htmlform-submit' )->text();
1380         }
1381
1382         /**
1383          * @param string $name Submit button name
1384          *
1385          * @return HTMLForm $this for chaining calls (since 1.20)
1386          */
1387         public function setSubmitName( $name ) {
1388                 $this->mSubmitName = $name;
1389
1390                 return $this;
1391         }
1392
1393         /**
1394          * @param string $name Tooltip for the submit button
1395          *
1396          * @return HTMLForm $this for chaining calls (since 1.20)
1397          */
1398         public function setSubmitTooltip( $name ) {
1399                 $this->mSubmitTooltip = $name;
1400
1401                 return $this;
1402         }
1403
1404         /**
1405          * Set the id for the submit button.
1406          *
1407          * @param string $t
1408          *
1409          * @todo FIXME: Integrity of $t is *not* validated
1410          * @return HTMLForm $this for chaining calls (since 1.20)
1411          */
1412         public function setSubmitID( $t ) {
1413                 $this->mSubmitID = $t;
1414
1415                 return $this;
1416         }
1417
1418         /**
1419          * Set an internal identifier for this form. It will be submitted as a hidden form field, allowing
1420          * HTMLForm to determine whether the form was submitted (or merely viewed). Setting this serves
1421          * two purposes:
1422          *
1423          * - If you use two or more forms on one page, it allows HTMLForm to identify which of the forms
1424          *   was submitted, and not attempt to validate the other ones.
1425          * - If you use checkbox or multiselect fields inside a form using the GET method, it allows
1426          *   HTMLForm to distinguish between the initial page view and a form submission with all
1427          *   checkboxes or select options unchecked.
1428          *
1429          * @since 1.28
1430          * @param string $ident
1431          * @return $this
1432          */
1433         public function setFormIdentifier( $ident ) {
1434                 $this->mFormIdentifier = $ident;
1435
1436                 return $this;
1437         }
1438
1439         /**
1440          * Stop a default submit button being shown for this form. This implies that an
1441          * alternate submit method must be provided manually.
1442          *
1443          * @since 1.22
1444          *
1445          * @param bool $suppressSubmit Set to false to re-enable the button again
1446          *
1447          * @return HTMLForm $this for chaining calls
1448          */
1449         public function suppressDefaultSubmit( $suppressSubmit = true ) {
1450                 $this->mShowSubmit = !$suppressSubmit;
1451
1452                 return $this;
1453         }
1454
1455         /**
1456          * Show a cancel button (or prevent it). The button is not shown by default.
1457          * @param bool $show
1458          * @return HTMLForm $this for chaining calls
1459          * @since 1.27
1460          */
1461         public function showCancel( $show = true ) {
1462                 $this->mShowCancel = $show;
1463                 return $this;
1464         }
1465
1466         /**
1467          * Sets the target where the user is redirected to after clicking cancel.
1468          * @param Title|string $target Target as a Title object or an URL
1469          * @return HTMLForm $this for chaining calls
1470          * @since 1.27
1471          */
1472         public function setCancelTarget( $target ) {
1473                 $this->mCancelTarget = $target;
1474                 return $this;
1475         }
1476
1477         /**
1478          * Set the id of the \<table\> or outermost \<div\> element.
1479          *
1480          * @since 1.22
1481          *
1482          * @param string $id New value of the id attribute, or "" to remove
1483          *
1484          * @return HTMLForm $this for chaining calls
1485          */
1486         public function setTableId( $id ) {
1487                 $this->mTableId = $id;
1488
1489                 return $this;
1490         }
1491
1492         /**
1493          * @param string $id DOM id for the form
1494          *
1495          * @return HTMLForm $this for chaining calls (since 1.20)
1496          */
1497         public function setId( $id ) {
1498                 $this->mId = $id;
1499
1500                 return $this;
1501         }
1502
1503         /**
1504          * @param string $name 'name' attribute for the form
1505          * @return HTMLForm $this for chaining calls
1506          */
1507         public function setName( $name ) {
1508                 $this->mName = $name;
1509
1510                 return $this;
1511         }
1512
1513         /**
1514          * Prompt the whole form to be wrapped in a "<fieldset>", with
1515          * this text as its "<legend>" element.
1516          *
1517          * @param string|bool $legend If false, no wrapper or legend will be displayed.
1518          *     If true, a wrapper will be displayed, but no legend.
1519          *     If a string, a wrapper will be displayed with that string as a legend.
1520          *     The string will be escaped before being output (this doesn't support HTML).
1521          *
1522          * @return HTMLForm $this for chaining calls (since 1.20)
1523          */
1524         public function setWrapperLegend( $legend ) {
1525                 $this->mWrapperLegend = $legend;
1526
1527                 return $this;
1528         }
1529
1530         /**
1531          * Prompt the whole form to be wrapped in a "<fieldset>", with
1532          * this message as its "<legend>" element.
1533          * @since 1.19
1534          *
1535          * @param string|Message $msg Message key or Message object
1536          *
1537          * @return HTMLForm $this for chaining calls (since 1.20)
1538          */
1539         public function setWrapperLegendMsg( $msg ) {
1540                 if ( !$msg instanceof Message ) {
1541                         $msg = $this->msg( $msg );
1542                 }
1543                 $this->setWrapperLegend( $msg->text() );
1544
1545                 return $this;
1546         }
1547
1548         /**
1549          * Set the prefix for various default messages
1550          * @todo Currently only used for the "<fieldset>" legend on forms
1551          * with multiple sections; should be used elsewhere?
1552          *
1553          * @param string $p
1554          *
1555          * @return HTMLForm $this for chaining calls (since 1.20)
1556          */
1557         public function setMessagePrefix( $p ) {
1558                 $this->mMessagePrefix = $p;
1559
1560                 return $this;
1561         }
1562
1563         /**
1564          * Set the title for form submission
1565          *
1566          * @param Title $t Title of page the form is on/should be posted to
1567          *
1568          * @return HTMLForm $this for chaining calls (since 1.20)
1569          */
1570         public function setTitle( $t ) {
1571                 $this->mTitle = $t;
1572
1573                 return $this;
1574         }
1575
1576         /**
1577          * Get the title
1578          * @return Title
1579          */
1580         public function getTitle() {
1581                 return $this->mTitle === false
1582                         ? $this->getContext()->getTitle()
1583                         : $this->mTitle;
1584         }
1585
1586         /**
1587          * Set the method used to submit the form
1588          *
1589          * @param string $method
1590          *
1591          * @return HTMLForm $this for chaining calls (since 1.20)
1592          */
1593         public function setMethod( $method = 'post' ) {
1594                 $this->mMethod = strtolower( $method );
1595
1596                 return $this;
1597         }
1598
1599         /**
1600          * @return string Always lowercase
1601          */
1602         public function getMethod() {
1603                 return $this->mMethod;
1604         }
1605
1606         /**
1607          * Wraps the given $section into an user-visible fieldset.
1608          *
1609          * @param string $legend Legend text for the fieldset
1610          * @param string $section The section content in plain Html
1611          * @param array $attributes Additional attributes for the fieldset
1612          * @return string The fieldset's Html
1613          */
1614         protected function wrapFieldSetSection( $legend, $section, $attributes ) {
1615                 return Xml::fieldset( $legend, $section, $attributes ) . "\n";
1616         }
1617
1618         /**
1619          * @todo Document
1620          *
1621          * @param array[]|HTMLFormField[] $fields Array of fields (either arrays or
1622          *   objects).
1623          * @param string $sectionName ID attribute of the "<table>" tag for this
1624          *   section, ignored if empty.
1625          * @param string $fieldsetIDPrefix ID prefix for the "<fieldset>" tag of
1626          *   each subsection, ignored if empty.
1627          * @param bool &$hasUserVisibleFields Whether the section had user-visible fields.
1628          * @throws LogicException When called on uninitialized field data, e.g. When
1629          *  HTMLForm::displayForm was called without calling HTMLForm::prepareForm
1630          *  first.
1631          *
1632          * @return string
1633          */
1634         public function displaySection( $fields,
1635                 $sectionName = '',
1636                 $fieldsetIDPrefix = '',
1637                 &$hasUserVisibleFields = false
1638         ) {
1639                 if ( $this->mFieldData === null ) {
1640                         throw new LogicException( 'HTMLForm::displaySection() called on uninitialized field data. '
1641                                 . 'You probably called displayForm() without calling prepareForm() first.' );
1642                 }
1643
1644                 $displayFormat = $this->getDisplayFormat();
1645
1646                 $html = [];
1647                 $subsectionHtml = '';
1648                 $hasLabel = false;
1649
1650                 // Conveniently, PHP method names are case-insensitive.
1651                 // For grep: this can call getDiv, getRaw, getInline, getVForm, getOOUI
1652                 $getFieldHtmlMethod = $displayFormat === 'table' ? 'getTableRow' : ( 'get' . $displayFormat );
1653
1654                 foreach ( $fields as $key => $value ) {
1655                         if ( $value instanceof HTMLFormField ) {
1656                                 $v = array_key_exists( $key, $this->mFieldData )
1657                                         ? $this->mFieldData[$key]
1658                                         : $value->getDefault();
1659
1660                                 $retval = $value->$getFieldHtmlMethod( $v );
1661
1662                                 // check, if the form field should be added to
1663                                 // the output.
1664                                 if ( $value->hasVisibleOutput() ) {
1665                                         $html[] = $retval;
1666
1667                                         $labelValue = trim( $value->getLabel() );
1668                                         if ( $labelValue !== '&#160;' && $labelValue !== '' ) {
1669                                                 $hasLabel = true;
1670                                         }
1671
1672                                         $hasUserVisibleFields = true;
1673                                 }
1674                         } elseif ( is_array( $value ) ) {
1675                                 $subsectionHasVisibleFields = false;
1676                                 $section =
1677                                         $this->displaySection( $value,
1678                                                 "mw-htmlform-$key",
1679                                                 "$fieldsetIDPrefix$key-",
1680                                                 $subsectionHasVisibleFields );
1681                                 $legend = null;
1682
1683                                 if ( $subsectionHasVisibleFields === true ) {
1684                                         // Display the section with various niceties.
1685                                         $hasUserVisibleFields = true;
1686
1687                                         $legend = $this->getLegend( $key );
1688
1689                                         $section = $this->getHeaderText( $key ) .
1690                                                 $section .
1691                                                 $this->getFooterText( $key );
1692
1693                                         $attributes = [];
1694                                         if ( $fieldsetIDPrefix ) {
1695                                                 $attributes['id'] = Sanitizer::escapeIdForAttribute( "$fieldsetIDPrefix$key" );
1696                                         }
1697                                         $subsectionHtml .= $this->wrapFieldSetSection( $legend, $section, $attributes );
1698                                 } else {
1699                                         // Just return the inputs, nothing fancy.
1700                                         $subsectionHtml .= $section;
1701                                 }
1702                         }
1703                 }
1704
1705                 $html = $this->formatSection( $html, $sectionName, $hasLabel );
1706
1707                 if ( $subsectionHtml ) {
1708                         if ( $this->mSubSectionBeforeFields ) {
1709                                 return $subsectionHtml . "\n" . $html;
1710                         } else {
1711                                 return $html . "\n" . $subsectionHtml;
1712                         }
1713                 } else {
1714                         return $html;
1715                 }
1716         }
1717
1718         /**
1719          * Put a form section together from the individual fields' HTML, merging it and wrapping.
1720          * @param array $fieldsHtml
1721          * @param string $sectionName
1722          * @param bool $anyFieldHasLabel
1723          * @return string HTML
1724          */
1725         protected function formatSection( array $fieldsHtml, $sectionName, $anyFieldHasLabel ) {
1726                 $displayFormat = $this->getDisplayFormat();
1727                 $html = implode( '', $fieldsHtml );
1728
1729                 if ( $displayFormat === 'raw' ) {
1730                         return $html;
1731                 }
1732
1733                 $classes = [];
1734
1735                 if ( !$anyFieldHasLabel ) { // Avoid strange spacing when no labels exist
1736                         $classes[] = 'mw-htmlform-nolabel';
1737                 }
1738
1739                 $attribs = [
1740                         'class' => implode( ' ', $classes ),
1741                 ];
1742
1743                 if ( $sectionName ) {
1744                         $attribs['id'] = Sanitizer::escapeIdForAttribute( $sectionName );
1745                 }
1746
1747                 if ( $displayFormat === 'table' ) {
1748                         return Html::rawElement( 'table',
1749                                         $attribs,
1750                                         Html::rawElement( 'tbody', [], "\n$html\n" ) ) . "\n";
1751                 } elseif ( $displayFormat === 'inline' ) {
1752                         return Html::rawElement( 'span', $attribs, "\n$html\n" );
1753                 } else {
1754                         return Html::rawElement( 'div', $attribs, "\n$html\n" );
1755                 }
1756         }
1757
1758         /**
1759          * Construct the form fields from the Descriptor array
1760          */
1761         public function loadData() {
1762                 $fieldData = [];
1763
1764                 foreach ( $this->mFlatFields as $fieldname => $field ) {
1765                         $request = $this->getRequest();
1766                         if ( $field->skipLoadData( $request ) ) {
1767                                 continue;
1768                         } elseif ( !empty( $field->mParams['disabled'] ) ) {
1769                                 $fieldData[$fieldname] = $field->getDefault();
1770                         } else {
1771                                 $fieldData[$fieldname] = $field->loadDataFromRequest( $request );
1772                         }
1773                 }
1774
1775                 # Filter data.
1776                 foreach ( $fieldData as $name => &$value ) {
1777                         $field = $this->mFlatFields[$name];
1778                         $value = $field->filter( $value, $this->mFlatFields );
1779                 }
1780
1781                 $this->mFieldData = $fieldData;
1782         }
1783
1784         /**
1785          * Stop a reset button being shown for this form
1786          *
1787          * @param bool $suppressReset Set to false to re-enable the button again
1788          *
1789          * @return HTMLForm $this for chaining calls (since 1.20)
1790          */
1791         public function suppressReset( $suppressReset = true ) {
1792                 $this->mShowReset = !$suppressReset;
1793
1794                 return $this;
1795         }
1796
1797         /**
1798          * Overload this if you want to apply special filtration routines
1799          * to the form as a whole, after it's submitted but before it's
1800          * processed.
1801          *
1802          * @param array $data
1803          *
1804          * @return array
1805          */
1806         public function filterDataForSubmit( $data ) {
1807                 return $data;
1808         }
1809
1810         /**
1811          * Get a string to go in the "<legend>" of a section fieldset.
1812          * Override this if you want something more complicated.
1813          *
1814          * @param string $key
1815          *
1816          * @return string
1817          */
1818         public function getLegend( $key ) {
1819                 return $this->msg( "{$this->mMessagePrefix}-$key" )->text();
1820         }
1821
1822         /**
1823          * Set the value for the action attribute of the form.
1824          * When set to false (which is the default state), the set title is used.
1825          *
1826          * @since 1.19
1827          *
1828          * @param string|bool $action
1829          *
1830          * @return HTMLForm $this for chaining calls (since 1.20)
1831          */
1832         public function setAction( $action ) {
1833                 $this->mAction = $action;
1834
1835                 return $this;
1836         }
1837
1838         /**
1839          * Get the value for the action attribute of the form.
1840          *
1841          * @since 1.22
1842          *
1843          * @return string
1844          */
1845         public function getAction() {
1846                 // If an action is alredy provided, return it
1847                 if ( $this->mAction !== false ) {
1848                         return $this->mAction;
1849                 }
1850
1851                 $articlePath = $this->getConfig()->get( 'ArticlePath' );
1852                 // Check whether we are in GET mode and the ArticlePath contains a "?"
1853                 // meaning that getLocalURL() would return something like "index.php?title=...".
1854                 // As browser remove the query string before submitting GET forms,
1855                 // it means that the title would be lost. In such case use wfScript() instead
1856                 // and put title in an hidden field (see getHiddenFields()).
1857                 if ( strpos( $articlePath, '?' ) !== false && $this->getMethod() === 'get' ) {
1858                         return wfScript();
1859                 }
1860
1861                 return $this->getTitle()->getLocalURL();
1862         }
1863
1864         /**
1865          * Set the value for the autocomplete attribute of the form.
1866          * When set to false (which is the default state), the attribute get not set.
1867          *
1868          * @since 1.27
1869          *
1870          * @param string|bool $autocomplete
1871          *
1872          * @return HTMLForm $this for chaining calls
1873          */
1874         public function setAutocomplete( $autocomplete ) {
1875                 $this->mAutocomplete = $autocomplete;
1876
1877                 return $this;
1878         }
1879
1880         /**
1881          * Turns a *-message parameter (which could be a MessageSpecifier, or a message name, or a
1882          * name + parameters array) into a Message.
1883          * @param mixed $value
1884          * @return Message
1885          */
1886         protected function getMessage( $value ) {
1887                 return Message::newFromSpecifier( $value )->setContext( $this );
1888         }
1889
1890         /**
1891          * Whether this form, with its current fields, requires the user agent to have JavaScript enabled
1892          * for the client-side HTML5 form validation to work correctly. If this function returns true, a
1893          * 'novalidate' attribute will be added on the `<form>` element. It will be removed if the user
1894          * agent has JavaScript support, in htmlform.js.
1895          *
1896          * @return boolean
1897          * @since 1.29
1898          */
1899         public function needsJSForHtml5FormValidation() {
1900                 foreach ( $this->mFlatFields as $fieldname => $field ) {
1901                         if ( $field->needsJSForHtml5FormValidation() ) {
1902                                 return true;
1903                         }
1904                 }
1905                 return false;
1906         }
1907 }