includes/Xml.php

   1 <?php
   2
   3 /**
   4  * Module of static functions for generating XML
   5  */
   6
   7 class Xml {
   8         /**
   9          * Format an XML element with given attributes and, optionally, text content.
  10          * Element and attribute names are assumed to be ready for literal inclusion.
  11          * Strings are assumed to not contain XML-illegal characters; special
  12          * characters (<, >, &) are escaped but illegals are not touched.
  13          *
  14          * @param $element String: element name
  15          * @param $attribs Array: Name=>value pairs. Values will be escaped.
  16          * @param $contents String: NULL to make an open tag only; '' for a contentless closed tag (default)
  17          * @param $allowShortTag Bool: whether '' in $contents will result in a contentless closed tag
  18          * @return string
  19          */
  20         public static function element( $element, $attribs = null, $contents = '', $allowShortTag = true ) {
  21                 $out = '<' . $element;
  22                 if( !is_null( $attribs ) ) {
  23                         $out .=  self::expandAttributes( $attribs );
  24                 }
  25                 if( is_null( $contents ) ) {
  26                         $out .= '>';
  27                 } else {
  28                         if( $allowShortTag && $contents === '' ) {
  29                                 $out .= ' />';
  30                         } else {
  31                                 $out .= '>' . htmlspecialchars( $contents ) . "</$element>";
  32                         }
  33                 }
  34                 return $out;
  35         }
  36
  37         /**
  38          * Given an array of ('attributename' => 'value'), it generates the code
  39          * to set the XML attributes : attributename="value".
  40          * The values are passed to Sanitizer::encodeAttribute.
  41          * Return null if no attributes given.
  42          * @param $attribs Array of attributes for an XML element
  43          */
  44         private static function expandAttributes( $attribs ) {
  45                 $out = '';
  46                 if( is_null( $attribs ) ) {
  47                         return null;
  48                 } elseif( is_array( $attribs ) ) {
  49                         foreach( $attribs as $name => $val )
  50                                 $out .= " {$name}=\"" . Sanitizer::encodeAttribute( $val ) . '"';
  51                         return $out;
  52                 } else {
  53                         throw new MWException( 'Expected attribute array, got something else in ' . __METHOD__ );
  54                 }
  55         }
  56
  57         /**
  58          * Given a string of attributes for an element, return an array of key =>
  59          * value pairs.  Can be used for backward compatibility with old functions
  60          * that accept attributes as strings instead of arrays.  Does not validate
  61          * the string, so watch out for GIGO.
  62          *
  63          * @param $attribs string
  64          * @return array
  65          */
  66         public static function explodeAttributes( $attribs ) {
  67                 $matches = array();
  68                 preg_match_all( '/([^\s=\'"]+)\s*=\s*(?:\'([^\']*)\'|"([^"]*)")/',
  69                         $attribs, $matches );
  70                 $ret = array();
  71                 for( $i = 0; $i < count( $matches[0] ); ++$i ) {
  72                         if( $matches[2][$i] !== '' ) {
  73                                 $val = $matches[2][$i];
  74                         } else {
  75                                 $val = $matches[3][$i];
  76                         }
  77                         $ret[$matches[1][$i]] = html_entity_decode( $val );
  78                 }
  79                 return $ret;
  80         }
  81
  82         /**
  83          * Format an XML element as with self::element(), but run text through the
  84          * UtfNormal::cleanUp() validator first to ensure that no invalid UTF-8
  85          * is passed.
  86          *
  87          * @param $element String:
  88          * @param $attribs Array: Name=>value pairs. Values will be escaped.
  89          * @param $contents String: NULL to make an open tag only; '' for a contentless closed tag (default)
  90          * @return string
  91          */
  92         public static function elementClean( $element, $attribs = array(), $contents = '') {
  93                 if( $attribs ) {
  94                         $attribs = array_map( array( 'UtfNormal', 'cleanUp' ), $attribs );
  95                 }
  96                 if( $contents ) {
  97                         wfProfileIn( __METHOD__ . '-norm' );
  98                         $contents = UtfNormal::cleanUp( $contents );
  99                         wfProfileOut( __METHOD__ . '-norm' );
 100                 }
 101                 return self::element( $element, $attribs, $contents );
 102         }
 103
 104         /**
 105          * This opens an XML element
 106          *
 107          * @param $element name of the element
 108          * @param $attribs array of attributes, see Xml::expandAttributes()
 109          * @return string
 110          */
 111         public static function openElement( $element, $attribs = null ) {
 112                 return '<' . $element . self::expandAttributes( $attribs ) . '>';
 113         }
 114
 115         /**
 116          * Shortcut to close an XML element
 117          * @param $element element name
 118          * @return string
 119          */
 120         public static function closeElement( $element ) { return "</$element>"; }
 121
 122         /**
 123          * Same as Xml::element(), but does not escape contents. Handy when the
 124          * content you have is already valid xml.
 125          *
 126          * @param $element element name
 127          * @param $attribs array of attributes
 128          * @param $contents content of the element
 129          * @return string
 130          */
 131         public static function tags( $element, $attribs = null, $contents ) {
 132                 return self::openElement( $element, $attribs ) . $contents . "</$element>";
 133         }
 134
 135         /**
 136          * Build a drop-down box for selecting a namespace
 137          *
 138          * @param $selected Mixed: Namespace which should be pre-selected
 139          * @param $all Mixed: Value of an item denoting all namespaces, or null to omit
 140          * @param $hidden Mixed: Include hidden namespaces? [WTF? --RC]
 141          * @param $element_name String: value of the "name" attribute of the select tag
 142          * @return string
 143          */
 144         public static function namespaceSelector( $selected = '', $all = null, $hidden = false, $element_name = 'namespace' ) {
 145                 global $wgContLang;
 146                 $namespaces = $wgContLang->getFormattedNamespaces();
 147                 $options = array();
 148
 149                 // Godawful hack... we'll be frequently passed selected namespaces
 150                 // as strings since PHP is such a shithole.
 151                 // But we also don't want blanks and nulls and "all"s matching 0,
 152                 // so let's convert *just* string ints to clean ints.
 153                 if( preg_match( '/^\d+$/', $selected ) ) {
 154                         $selected = intval( $selected );
 155                 }
 156
 157                 if( !is_null( $all ) )
 158                         $namespaces = array( $all => wfMsg( 'namespacesall' ) ) + $namespaces;
 159                 foreach( $namespaces as $index => $name ) {
 160                         if( $index < NS_MAIN )
 161                                 continue;
 162                         if( $index === 0 )
 163                                 $name = wfMsg( 'blanknamespace' );
 164                         $options[] = self::option( $name, $index, $index === $selected );
 165                 }
 166
 167                 return Xml::openElement( 'select', array( 'id' => 'namespace', 'name' => $element_name,
 168                         'class' => 'namespaceselector' ) )
 169                         . "\n"
 170                         . implode( "\n", $options )
 171                         . "\n"
 172                         . Xml::closeElement( 'select' );
 173         }
 174
 175         /**
 176          * Create a date selector
 177          *
 178          * @param $selected Mixed: the month which should be selected, default ''
 179          * @param $allmonths String: value of a special item denoting all month. Null to not include (default)
 180          * @param $id String: Element identifier
 181          * @return String: Html string containing the month selector
 182          */
 183         public static function monthSelector( $selected = '', $allmonths = null, $id = 'month' ) {
 184                 global $wgLang;
 185                 $options = array();
 186             if( is_null( $selected ) )
 187                         $selected = '';
 188             if( !is_null( $allmonths ) )
 189                         $options[] = self::option( wfMsg( 'monthsall' ), $allmonths, $selected === $allmonths );
 190                 for( $i = 1; $i < 13; $i++ )
 191                                 $options[] = self::option( $wgLang->getMonthName( $i ), $i, $selected === $i );
 192                 return self::openElement( 'select', array( 'id' => $id, 'name' => 'month', 'class' => 'mw-month-selector' ) )
 193                         . implode( "\n", $options )
 194                         . self::closeElement( 'select' );
 195         }
 196
 197         /**
 198          *
 199          * @param $selected The language code of the selected language
 200          * @param $customisedOnly If true only languages which have some content are listed
 201          * @return array of label and select
 202          */
 203         public static function languageSelector( $selected, $customisedOnly = true ) {
 204                 global $wgContLanguageCode;
 205                 /**
 206                  * Make sure the site language is in the list; a custom language code
 207                  * might not have a defined name...
 208                  */
 209                 $languages = Language::getLanguageNames( $customisedOnly );
 210                 if( !array_key_exists( $wgContLanguageCode, $languages ) ) {
 211                         $languages[$wgContLanguageCode] = $wgContLanguageCode;
 212                 }
 213                 ksort( $languages );
 214
 215                 /**
 216                  * If a bogus value is set, default to the content language.
 217                  * Otherwise, no default is selected and the user ends up
 218                  * with an Afrikaans interface since it's first in the list.
 219                  */
 220                 $selected = isset( $languages[$selected] ) ? $selected : $wgContLanguageCode;
 221                 $options = "\n";
 222                 foreach( $languages as $code => $name ) {
 223                         $options .= Xml::option( "$code - $name", $code, ($code == $selected) ) . "\n";
 224                 }
 225
 226                 return array(
 227                         Xml::label( wfMsg('yourlanguage'), 'wpUserLanguage' ),
 228                         Xml::tags( 'select',
 229                                 array( 'id' => 'wpUserLanguage', 'name' => 'wpUserLanguage' ),
 230                                 $options
 231                         )
 232                 );
 233
 234         }
 235
 236         /**
 237          * Shortcut to make a span element
 238          * @param $text content of the element, will be escaped
 239          * @param $class class name of the span element
 240          * @param $attribs other attributes
 241          * @return string
 242          */
 243         public static function span( $text, $class, $attribs=array() ) {
 244                 return self::element( 'span', array( 'class' => $class ) + $attribs, $text );
 245         }
 246
 247         /**
 248          * Shortcut to make a specific element with a class attribute
 249          * @param $text content of the element, will be escaped
 250          * @param $class class name of the span element
 251          * @param $tag element name
 252          * @param $attribs other attributes
 253          * @return string
 254          */
 255         public static function wrapClass( $text, $class, $tag='span', $attribs=array() ) {
 256                 return self::tags( $tag, array( 'class' => $class ) + $attribs, $text );
 257         }
 258
 259         /**
 260          * Convenience function to build an HTML text input field
 261          * @param $name value of the name attribute
 262          * @param $size value of the size attribute
 263          * @param $value value of the value attribute
 264          * @param $attribs other attributes
 265          * @return string HTML
 266          */
 267         public static function input( $name, $size=false, $value=false, $attribs=array() ) {
 268                 return self::element( 'input', array(
 269                         'name' => $name,
 270                         'size' => $size,
 271                         'value' => $value ) + $attribs );
 272         }
 273
 274         /**
 275          * Convenience function to build an HTML password input field
 276          * @param $name value of the name attribute
 277          * @param $size value of the size attribute
 278          * @param $value value of the value attribute
 279          * @param $attribs other attributes
 280          * @return string HTML
 281          */
 282         public static function password( $name, $size=false, $value=false, $attribs=array() ) {
 283                 return self::input( $name, $size, $value, array_merge($attribs, array('type' => 'password')));
 284         }
 285
 286         /**
 287          * Internal function for use in checkboxes and radio buttons and such.
 288          * @return array
 289          */
 290         public static function attrib( $name, $present = true ) {
 291                 return $present ? array( $name => $name ) : array();
 292         }
 293
 294         /**
 295          * Convenience function to build an HTML checkbox
 296          * @param $name value of the name attribute
 297          * @param $checked Whether the checkbox is checked or not
 298          * @param $attribs other attributes
 299          * @return string HTML
 300          */
 301         public static function check( $name, $checked=false, $attribs=array() ) {
 302                 return self::element( 'input', array_merge(
 303                         array(
 304                                 'name' => $name,
 305                                 'type' => 'checkbox',
 306                                 'value' => 1 ),
 307                         self::attrib( 'checked', $checked ),
 308                         $attribs ) );
 309         }
 310
 311         /**
 312          * Convenience function to build an HTML radio button
 313          * @param $name value of the name attribute
 314          * @param $value value of the value attribute
 315          * @param $checked Whether the checkbox is checked or not
 316          * @param $attribs other attributes
 317          * @return string HTML
 318          */
 319         public static function radio( $name, $value, $checked=false, $attribs=array() ) {
 320                 return self::element( 'input', array(
 321                         'name' => $name,
 322                         'type' => 'radio',
 323                         'value' => $value ) + self::attrib( 'checked', $checked ) + $attribs );
 324         }
 325
 326         /**
 327          * Convenience function to build an HTML form label
 328          * @param $label text of the label
 329          * @param $id
 330          * @return string HTML
 331          */
 332         public static function label( $label, $id ) {
 333                 return self::element( 'label', array( 'for' => $id ), $label );
 334         }
 335
 336         /**
 337          * Convenience function to build an HTML text input field with a label
 338          * @param $label text of the label
 339          * @param $name value of the name attribute
 340          * @param $id id of the input
 341          * @param $size value of the size attribute
 342          * @param $value value of the value attribute
 343          * @param $attribs other attributes
 344          * @return string HTML
 345          */
 346         public static function inputLabel( $label, $name, $id, $size=false, $value=false, $attribs=array() ) {
 347                 list( $label, $input ) = self::inputLabelSep( $label, $name, $id, $size, $value, $attribs );
 348                 return $label . '&nbsp;' . $input;
 349         }
 350
 351         /**
 352          * Same as Xml::inputLabel() but return input and label in an array
 353          */
 354         public static function inputLabelSep( $label, $name, $id, $size=false, $value=false, $attribs=array() ) {
 355                 return array(
 356                         Xml::label( $label, $id ),
 357                         self::input( $name, $size, $value, array( 'id' => $id ) + $attribs )
 358                 );
 359         }
 360
 361         /**
 362          * Convenience function to build an HTML checkbox with a label
 363          * @return string HTML
 364          */
 365         public static function checkLabel( $label, $name, $id, $checked=false, $attribs=array() ) {
 366                 return self::check( $name, $checked, array( 'id' => $id ) + $attribs ) .
 367                         '&nbsp;' .
 368                         self::label( $label, $id );
 369         }
 370
 371         /**
 372          * Convenience function to build an HTML radio button with a label
 373          * @return string HTML
 374          */
 375         public static function radioLabel( $label, $name, $value, $id, $checked=false, $attribs=array() ) {
 376                 return self::radio( $name, $value, $checked, array( 'id' => $id ) + $attribs ) .
 377                         '&nbsp;' .
 378                         self::label( $label, $id );
 379         }
 380
 381         /**
 382          * Convenience function to build an HTML submit button
 383          * @param $value String: label text for the button
 384          * @param $attribs Array: optional custom attributes
 385          * @return string HTML
 386          */
 387         public static function submitButton( $value, $attribs=array() ) {
 388                 return self::element( 'input', array( 'type' => 'submit', 'value' => $value ) + $attribs );
 389         }
 390
 391         /**
 392          * Convenience function to build an HTML hidden form field.
 393          * @param $name String: name attribute for the field
 394          * @param $value String: value for the hidden field
 395          * @param $attribs Array: optional custom attributes
 396          * @return string HTML
 397          */
 398         public static function hidden( $name, $value, $attribs=array() ) {
 399                 return self::element( 'input', array(
 400                         'name' => $name,
 401                         'type' => 'hidden',
 402                         'value' => $value ) + $attribs );
 403         }
 404
 405         /**
 406          * Convenience function to build an HTML drop-down list item.
 407          * @param $text String: text for this item
 408          * @param $value String: form submission value; if empty, use text
 409          * @param $selected boolean: if true, will be the default selected item
 410          * @param $attribs array: optional additional HTML attributes
 411          * @return string HTML
 412          */
 413         public static function option( $text, $value=null, $selected=false,
 414                         $attribs=array() ) {
 415                 if( !is_null( $value ) ) {
 416                         $attribs['value'] = $value;
 417                 }
 418                 if( $selected ) {
 419                         $attribs['selected'] = 'selected';
 420                 }
 421                 return self::element( 'option', $attribs, $text );
 422         }
 423
 424         /**
 425          * Build a drop-down box from a textual list.
 426          *
 427          * @param $name Mixed: Name and id for the drop-down
 428          * @param $class Mixed: CSS classes for the drop-down
 429          * @param $other Mixed: Text for the "Other reasons" option
 430          * @param $list Mixed: Correctly formatted text to be used to generate the options
 431          * @param $selected Mixed: Option which should be pre-selected
 432          * @param $tabindex Mixed: Value of the tabindex attribute
 433          * @return string
 434          */
 435         public static function listDropDown( $name= '', $list = '', $other = '', $selected = '', $class = '', $tabindex = Null ) {
 436                 $options = '';
 437                 $optgroup = false;
 438
 439                 $options = self::option( $other, 'other', $selected === 'other' );
 440
 441                 foreach ( explode( "\n", $list ) as $option) {
 442                                 $value = trim( $option );
 443                                 if ( $value == '' ) {
 444                                         continue;
 445                                 } elseif ( substr( $value, 0, 1) == '*' && substr( $value, 1, 1) != '*' ) {
 446                                         // A new group is starting ...
 447                                         $value = trim( substr( $value, 1 ) );
 448                                         if( $optgroup ) $options .= self::closeElement('optgroup');
 449                                         $options .= self::openElement( 'optgroup', array( 'label' => $value ) );
 450                                         $optgroup = true;
 451                                 } elseif ( substr( $value, 0, 2) == '**' ) {
 452                                         // groupmember
 453                                         $value = trim( substr( $value, 2 ) );
 454                                         $options .= self::option( $value, $value, $selected === $value );
 455                                 } else {
 456                                         // groupless reason list
 457                                         if( $optgroup ) $options .= self::closeElement('optgroup');
 458                                         $options .= self::option( $value, $value, $selected === $value );
 459                                         $optgroup = false;
 460                                 }
 461                         }
 462                         if( $optgroup ) $options .= self::closeElement('optgroup');
 463
 464                 $attribs = array();
 465                 if( $name ) {
 466                         $attribs['id'] = $name;
 467                         $attribs['name'] = $name;
 468                 }
 469                 if( $class ) {
 470                         $attribs['class'] = $class;
 471                 }
 472                 if( $tabindex ) {
 473                         $attribs['tabindex'] = $tabindex;
 474                 }
 475                 return Xml::openElement( 'select', $attribs )
 476                         . "\n"
 477                         . $options
 478                         . "\n"
 479                         . Xml::closeElement( 'select' );
 480         }
 481
 482         /**
 483          * Shortcut for creating fieldsets.
 484          *
 485          * @param $legend Legend of the fieldset. If evaluates to false, legend is not added.
 486          * @param $content Pre-escaped content for the fieldset. If false, only open fieldset is returned.
 487          * @param $attribs Any attributes to fieldset-element.
 488          */
 489         public static function fieldset( $legend = false, $content = false, $attribs = array() ) {
 490                 $s = Xml::openElement( 'fieldset', $attribs ) . "\n";
 491                 if ( $legend ) {
 492                         $s .= Xml::element( 'legend', null, $legend ) . "\n";
 493                 }
 494                 if ( $content !== false ) {
 495                         $s .= $content . "\n";
 496                         $s .= Xml::closeElement( 'fieldset' ) . "\n";
 497                 }
 498
 499                 return $s;
 500         }
 501
 502         /**
 503          * Shortcut for creating textareas.
 504          *
 505          * @param $name The 'name' for the textarea
 506          * @param $content Content for the textarea
 507          * @param $cols The number of columns for the textarea
 508          * @param $rows The number of rows for the textarea
 509          * @param $attribs Any other attributes for the textarea
 510          */
 511         public static function textarea( $name, $content, $cols = 40, $rows = 5, $attribs = array() ) {
 512                 return self::element( 'textarea',
 513                                         array(  'name' => $name,
 514                                                 'id' => $name,
 515                                                 'cols' => $cols,
 516                                                 'rows' => $rows
 517                                         ) + $attribs,
 518                                         $content, false );
 519         }
 520
 521         /**
 522          * Returns an escaped string suitable for inclusion in a string literal
 523          * for JavaScript source code.
 524          * Illegal control characters are assumed not to be present.
 525          *
 526          * @param $string String to escape
 527          * @return String
 528          */
 529         public static function escapeJsString( $string ) {
 530                 // See ECMA 262 section 7.8.4 for string literal format
 531                 $pairs = array(
 532                         "\\" => "\\\\",
 533                         "\"" => "\\\"",
 534                         '\'' => '\\\'',
 535                         "\n" => "\\n",
 536                         "\r" => "\\r",
 537
 538                         # To avoid closing the element or CDATA section
 539                         "<" => "\\x3c",
 540                         ">" => "\\x3e",
 541
 542                         # To avoid any complaints about bad entity refs
 543                         "&" => "\\x26",
 544
 545                         # Work around https://bugzilla.mozilla.org/show_bug.cgi?id=274152
 546                         # Encode certain Unicode formatting chars so affected
 547                         # versions of Gecko don't misinterpret our strings;
 548                         # this is a common problem with Farsi text.
 549                         "\xe2\x80\x8c" => "\\u200c", // ZERO WIDTH NON-JOINER
 550                         "\xe2\x80\x8d" => "\\u200d", // ZERO WIDTH JOINER
 551                 );
 552                 return strtr( $string, $pairs );
 553         }
 554
 555         /**
 556          * Encode a variable of unknown type to JavaScript.
 557          * Arrays are converted to JS arrays, objects are converted to JS associative
 558          * arrays (objects). So cast your PHP associative arrays to objects before
 559          * passing them to here.
 560          */
 561         public static function encodeJsVar( $value ) {
 562                 if ( is_bool( $value ) ) {
 563                         $s = $value ? 'true' : 'false';
 564                 } elseif ( is_null( $value ) ) {
 565                         $s = 'null';
 566                 } elseif ( is_int( $value ) ) {
 567                         $s = $value;
 568                 } elseif ( is_array( $value ) ) {
 569                         $s = '[';
 570                         foreach ( $value as $elt ) {
 571                                 if ( $s != '[' ) {
 572                                         $s .= ', ';
 573                                 }
 574                                 $s .= self::encodeJsVar( $elt );
 575                         }
 576                         $s .= ']';
 577                 } elseif ( is_object( $value ) ) {
 578                         $s = '{';
 579                         foreach ( (array)$value as $name => $elt ) {
 580                                 if ( $s != '{' ) {
 581                                         $s .= ', ';
 582                                 }
 583                                 $s .= '"' . self::escapeJsString( $name ) . '": ' .
 584                                         self::encodeJsVar( $elt );
 585                         }
 586                         $s .= '}';
 587                 } else {
 588                         $s = '"' . self::escapeJsString( $value ) . '"';
 589                 }
 590                 return $s;
 591         }
 592
 593
 594         /**
 595          * Check if a string is well-formed XML.
 596          * Must include the surrounding tag.
 597          *
 598          * @param $text String: string to test.
 599          * @return bool
 600          *
 601          * @todo Error position reporting return
 602          */
 603         public static function isWellFormed( $text ) {
 604                 $parser = xml_parser_create( "UTF-8" );
 605
 606                 # case folding violates XML standard, turn it off
 607                 xml_parser_set_option( $parser, XML_OPTION_CASE_FOLDING, false );
 608
 609                 if( !xml_parse( $parser, $text, true ) ) {
 610                         //$err = xml_error_string( xml_get_error_code( $parser ) );
 611                         //$position = xml_get_current_byte_index( $parser );
 612                         //$fragment = $this->extractFragment( $html, $position );
 613                         //$this->mXmlError = "$err at byte $position:\n$fragment";
 614                         xml_parser_free( $parser );
 615                         return false;
 616                 }
 617                 xml_parser_free( $parser );
 618                 return true;
 619         }
 620
 621         /**
 622          * Check if a string is a well-formed XML fragment.
 623          * Wraps fragment in an \<html\> bit and doctype, so it can be a fragment
 624          * and can use HTML named entities.
 625          *
 626          * @param $text String:
 627          * @return bool
 628          */
 629         public static function isWellFormedXmlFragment( $text ) {
 630                 $html =
 631                         Sanitizer::hackDocType() .
 632                         '<html>' .
 633                         $text .
 634                         '</html>';
 635                 return Xml::isWellFormed( $html );
 636         }
 637
 638         /**
 639          * Replace " > and < with their respective HTML entities ( &quot;,
 640          * &gt;, &lt;)
 641          *
 642          * @param $in String: text that might contain HTML tags.
 643          * @return string Escaped string
 644          */
 645         public static function escapeTagsOnly( $in ) {
 646                 return str_replace(
 647                         array( '"', '>', '<' ),
 648                         array( '&quot;', '&gt;', '&lt;' ),
 649                         $in );
 650         }
 651
 652         /**
 653         * Generate a form (without the opening form element).
 654         * Output optionally includes a submit button.
 655         * @param $fields Associative array, key is message corresponding to a description for the field (colon is in the message), value is appropriate input.
 656         * @param $submitLabel A message containing a label for the submit button.
 657         * @return string HTML form.
 658         */
 659         public static function buildForm( $fields, $submitLabel = null ) {
 660                 $form = '';
 661                 $form .= "<table><tbody>";
 662
 663                 foreach( $fields as $labelmsg => $input ) {
 664                         $id = "mw-$labelmsg";
 665
 666                         $form .= Xml::openElement( 'tr', array( 'id' => $id ) );
 667                         $form .= Xml::tags( 'td', array('class' => 'mw-label'), wfMsgExt( $labelmsg, array('parseinline') ) );
 668                         $form .= Xml::openElement( 'td' ) . $input . Xml::closeElement( 'td' );
 669                         $form .= Xml::closeElement( 'tr' );
 670                 }
 671
 672                 $form .= "</tbody></table>";
 673
 674                 if ($submitLabel) {
 675                         $form .= Xml::submitButton( wfMsg($submitLabel) );
 676                 }
 677
 678                 return $form;
 679         }
 680 }
 681
 682 class XmlSelect {
 683         protected $options = array();
 684         protected $default = false;
 685         protected $attributes = array();
 686
 687         public function __construct( $name = false, $id = false, $default = false ) {
 688                 if ( $name ) $this->setAttribute( 'name', $name );
 689                 if ( $id ) $this->setAttribute( 'id', $id );
 690                 if ( $default ) $this->default = $default;
 691         }
 692
 693         public function setDefault( $default ) {
 694                 $this->default = $default;
 695         }
 696
 697         public function setAttribute( $name, $value ) {
 698                 $this->attributes[$name] = $value;
 699         }
 700
 701         public function addOption( $name, $value = false ) {
 702                 $value = $value ? $value : $name;
 703                 $this->options[] = Xml::option( $name, $value, $value === $this->default );
 704         }
 705
 706         public function getHTML() {
 707                 return Xml::tags( 'select', $this->attributes, implode( "\n", $this->options ) );
 708         }
 709
 710 }