includes/parser/Preprocessor_Hash.php

   1 <?php
   2 /**
   3  * Preprocessor using PHP arrays
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Parser
  22  */
  23
  24 /**
  25  * Differences from DOM schema:
  26  *   * attribute nodes are children
  27  *   * "<h>" nodes that aren't at the top are replaced with <possible-h>
  28  * @ingroup Parser
  29  * @codingStandardsIgnoreStart
  30  */
  31 class Preprocessor_Hash implements Preprocessor {
  32         // @codingStandardsIgnoreEnd
  33
  34         /**
  35          * @var Parser
  36          */
  37         public $parser;
  38
  39         const CACHE_VERSION = 1;
  40
  41         public function __construct( $parser ) {
  42                 $this->parser = $parser;
  43         }
  44
  45         /**
  46          * @return PPFrame_Hash
  47          */
  48         public function newFrame() {
  49                 return new PPFrame_Hash( $this );
  50         }
  51
  52         /**
  53          * @param array $args
  54          * @return PPCustomFrame_Hash
  55          */
  56         public function newCustomFrame( $args ) {
  57                 return new PPCustomFrame_Hash( $this, $args );
  58         }
  59
  60         /**
  61          * @param array $values
  62          * @return PPNode_Hash_Array
  63          */
  64         public function newPartNodeArray( $values ) {
  65                 $list = array();
  66
  67                 foreach ( $values as $k => $val ) {
  68                         $partNode = new PPNode_Hash_Tree( 'part' );
  69                         $nameNode = new PPNode_Hash_Tree( 'name' );
  70
  71                         if ( is_int( $k ) ) {
  72                                 $nameNode->addChild( new PPNode_Hash_Attr( 'index', $k ) );
  73                                 $partNode->addChild( $nameNode );
  74                         } else {
  75                                 $nameNode->addChild( new PPNode_Hash_Text( $k ) );
  76                                 $partNode->addChild( $nameNode );
  77                                 $partNode->addChild( new PPNode_Hash_Text( '=' ) );
  78                         }
  79
  80                         $valueNode = new PPNode_Hash_Tree( 'value' );
  81                         $valueNode->addChild( new PPNode_Hash_Text( $val ) );
  82                         $partNode->addChild( $valueNode );
  83
  84                         $list[] = $partNode;
  85                 }
  86
  87                 $node = new PPNode_Hash_Array( $list );
  88                 return $node;
  89         }
  90
  91         /**
  92          * Preprocess some wikitext and return the document tree.
  93          * This is the ghost of Parser::replace_variables().
  94          *
  95          * @param string $text The text to parse
  96          * @param int $flags Bitwise combination of:
  97          *    Parser::PTD_FOR_INCLUSION    Handle "<noinclude>" and "<includeonly>" as if the text is being
  98          *                                 included. Default is to assume a direct page view.
  99          *
 100          * The generated DOM tree must depend only on the input text and the flags.
 101          * The DOM tree must be the same in OT_HTML and OT_WIKI mode, to avoid a regression of bug 4899.
 102          *
 103          * Any flag added to the $flags parameter here, or any other parameter liable to cause a
 104          * change in the DOM tree for a given text, must be passed through the section identifier
 105          * in the section edit link and thus back to extractSections().
 106          *
 107          * The output of this function is currently only cached in process memory, but a persistent
 108          * cache may be implemented at a later date which takes further advantage of these strict
 109          * dependency requirements.
 110          *
 111          * @throws MWException
 112          * @return PPNode_Hash_Tree
 113          */
 114         public function preprocessToObj( $text, $flags = 0 ) {
 115                 // Check cache.
 116                 global $wgMemc, $wgPreprocessorCacheThreshold;
 117
 118                 $cacheable = $wgPreprocessorCacheThreshold !== false
 119                         && strlen( $text ) > $wgPreprocessorCacheThreshold;
 120
 121                 if ( $cacheable ) {
 122
 123                         $cacheKey = wfMemcKey( 'preprocess-hash', md5( $text ), $flags );
 124                         $cacheValue = $wgMemc->get( $cacheKey );
 125                         if ( $cacheValue ) {
 126                                 $version = substr( $cacheValue, 0, 8 );
 127                                 if ( intval( $version ) == self::CACHE_VERSION ) {
 128                                         $hash = unserialize( substr( $cacheValue, 8 ) );
 129                                         // From the cache
 130                                         wfDebugLog( "Preprocessor",
 131                                                 "Loaded preprocessor hash from memcached (key $cacheKey)" );
 132                                         return $hash;
 133                                 }
 134                         }
 135                 }
 136
 137                 $rules = array(
 138                         '{' => array(
 139                                 'end' => '}',
 140                                 'names' => array(
 141                                         2 => 'template',
 142                                         3 => 'tplarg',
 143                                 ),
 144                                 'min' => 2,
 145                                 'max' => 3,
 146                         ),
 147                         '[' => array(
 148                                 'end' => ']',
 149                                 'names' => array( 2 => null ),
 150                                 'min' => 2,
 151                                 'max' => 2,
 152                         )
 153                 );
 154
 155                 $forInclusion = $flags & Parser::PTD_FOR_INCLUSION;
 156
 157                 $xmlishElements = $this->parser->getStripList();
 158                 $enableOnlyinclude = false;
 159                 if ( $forInclusion ) {
 160                         $ignoredTags = array( 'includeonly', '/includeonly' );
 161                         $ignoredElements = array( 'noinclude' );
 162                         $xmlishElements[] = 'noinclude';
 163                         if ( strpos( $text, '<onlyinclude>' ) !== false
 164                                 && strpos( $text, '</onlyinclude>' ) !== false
 165                         ) {
 166                                 $enableOnlyinclude = true;
 167                         }
 168                 } else {
 169                         $ignoredTags = array( 'noinclude', '/noinclude', 'onlyinclude', '/onlyinclude' );
 170                         $ignoredElements = array( 'includeonly' );
 171                         $xmlishElements[] = 'includeonly';
 172                 }
 173                 $xmlishRegex = implode( '|', array_merge( $xmlishElements, $ignoredTags ) );
 174
 175                 // Use "A" modifier (anchored) instead of "^", because ^ doesn't work with an offset
 176                 $elementsRegex = "~($xmlishRegex)(?:\s|\/>|>)|(!--)~iA";
 177
 178                 $stack = new PPDStack_Hash;
 179
 180                 $searchBase = "[{<\n";
 181                 // For fast reverse searches
 182                 $revText = strrev( $text );
 183                 $lengthText = strlen( $text );
 184
 185                 // Input pointer, starts out pointing to a pseudo-newline before the start
 186                 $i = 0;
 187                 // Current accumulator
 188                 $accum =& $stack->getAccum();
 189                 // True to find equals signs in arguments
 190                 $findEquals = false;
 191                 // True to take notice of pipe characters
 192                 $findPipe = false;
 193                 $headingIndex = 1;
 194                 // True if $i is inside a possible heading
 195                 $inHeading = false;
 196                 // True if there are no more greater-than (>) signs right of $i
 197                 $noMoreGT = false;
 198                 // True to ignore all input up to the next <onlyinclude>
 199                 $findOnlyinclude = $enableOnlyinclude;
 200                 // Do a line-start run without outputting an LF character
 201                 $fakeLineStart = true;
 202
 203                 while ( true ) {
 204                         //$this->memCheck();
 205
 206                         if ( $findOnlyinclude ) {
 207                                 // Ignore all input up to the next <onlyinclude>
 208                                 $startPos = strpos( $text, '<onlyinclude>', $i );
 209                                 if ( $startPos === false ) {
 210                                         // Ignored section runs to the end
 211                                         $accum->addNodeWithText( 'ignore', substr( $text, $i ) );
 212                                         break;
 213                                 }
 214                                 $tagEndPos = $startPos + strlen( '<onlyinclude>' ); // past-the-end
 215                                 $accum->addNodeWithText( 'ignore', substr( $text, $i, $tagEndPos - $i ) );
 216                                 $i = $tagEndPos;
 217                                 $findOnlyinclude = false;
 218                         }
 219
 220                         if ( $fakeLineStart ) {
 221                                 $found = 'line-start';
 222                                 $curChar = '';
 223                         } else {
 224                                 # Find next opening brace, closing brace or pipe
 225                                 $search = $searchBase;
 226                                 if ( $stack->top === false ) {
 227                                         $currentClosing = '';
 228                                 } else {
 229                                         $currentClosing = $stack->top->close;
 230                                         $search .= $currentClosing;
 231                                 }
 232                                 if ( $findPipe ) {
 233                                         $search .= '|';
 234                                 }
 235                                 if ( $findEquals ) {
 236                                         // First equals will be for the template
 237                                         $search .= '=';
 238                                 }
 239                                 $rule = null;
 240                                 # Output literal section, advance input counter
 241                                 $literalLength = strcspn( $text, $search, $i );
 242                                 if ( $literalLength > 0 ) {
 243                                         $accum->addLiteral( substr( $text, $i, $literalLength ) );
 244                                         $i += $literalLength;
 245                                 }
 246                                 if ( $i >= $lengthText ) {
 247                                         if ( $currentClosing == "\n" ) {
 248                                                 // Do a past-the-end run to finish off the heading
 249                                                 $curChar = '';
 250                                                 $found = 'line-end';
 251                                         } else {
 252                                                 # All done
 253                                                 break;
 254                                         }
 255                                 } else {
 256                                         $curChar = $text[$i];
 257                                         if ( $curChar == '|' ) {
 258                                                 $found = 'pipe';
 259                                         } elseif ( $curChar == '=' ) {
 260                                                 $found = 'equals';
 261                                         } elseif ( $curChar == '<' ) {
 262                                                 $found = 'angle';
 263                                         } elseif ( $curChar == "\n" ) {
 264                                                 if ( $inHeading ) {
 265                                                         $found = 'line-end';
 266                                                 } else {
 267                                                         $found = 'line-start';
 268                                                 }
 269                                         } elseif ( $curChar == $currentClosing ) {
 270                                                 $found = 'close';
 271                                         } elseif ( isset( $rules[$curChar] ) ) {
 272                                                 $found = 'open';
 273                                                 $rule = $rules[$curChar];
 274                                         } else {
 275                                                 # Some versions of PHP have a strcspn which stops on null characters
 276                                                 # Ignore and continue
 277                                                 ++$i;
 278                                                 continue;
 279                                         }
 280                                 }
 281                         }
 282
 283                         if ( $found == 'angle' ) {
 284                                 $matches = false;
 285                                 // Handle </onlyinclude>
 286                                 if ( $enableOnlyinclude
 287                                         && substr( $text, $i, strlen( '</onlyinclude>' ) ) == '</onlyinclude>'
 288                                 ) {
 289                                         $findOnlyinclude = true;
 290                                         continue;
 291                                 }
 292
 293                                 // Determine element name
 294                                 if ( !preg_match( $elementsRegex, $text, $matches, 0, $i + 1 ) ) {
 295                                         // Element name missing or not listed
 296                                         $accum->addLiteral( '<' );
 297                                         ++$i;
 298                                         continue;
 299                                 }
 300                                 // Handle comments
 301                                 if ( isset( $matches[2] ) && $matches[2] == '!--' ) {
 302
 303                                         // To avoid leaving blank lines, when a sequence of
 304                                         // space-separated comments is both preceded and followed by
 305                                         // a newline (ignoring spaces), then
 306                                         // trim leading and trailing spaces and the trailing newline.
 307
 308                                         // Find the end
 309                                         $endPos = strpos( $text, '-->', $i + 4 );
 310                                         if ( $endPos === false ) {
 311                                                 // Unclosed comment in input, runs to end
 312                                                 $inner = substr( $text, $i );
 313                                                 $accum->addNodeWithText( 'comment', $inner );
 314                                                 $i = $lengthText;
 315                                         } else {
 316                                                 // Search backwards for leading whitespace
 317                                                 $wsStart = $i ? ( $i - strspn( $revText, " \t", $lengthText - $i ) ) : 0;
 318
 319                                                 // Search forwards for trailing whitespace
 320                                                 // $wsEnd will be the position of the last space (or the '>' if there's none)
 321                                                 $wsEnd = $endPos + 2 + strspn( $text, " \t", $endPos + 3 );
 322
 323                                                 // Keep looking forward as long as we're finding more
 324                                                 // comments.
 325                                                 $comments = array( array( $wsStart, $wsEnd ) );
 326                                                 while ( substr( $text, $wsEnd + 1, 4 ) == '<!--' ) {
 327                                                         $c = strpos( $text, '-->', $wsEnd + 4 );
 328                                                         if ( $c === false ) {
 329                                                                 break;
 330                                                         }
 331                                                         $c = $c + 2 + strspn( $text, " \t", $c + 3 );
 332                                                         $comments[] = array( $wsEnd + 1, $c );
 333                                                         $wsEnd = $c;
 334                                                 }
 335
 336                                                 // Eat the line if possible
 337                                                 // TODO: This could theoretically be done if $wsStart == 0, i.e. for comments at
 338                                                 // the overall start. That's not how Sanitizer::removeHTMLcomments() did it, but
 339                                                 // it's a possible beneficial b/c break.
 340                                                 if ( $wsStart > 0 && substr( $text, $wsStart - 1, 1 ) == "\n"
 341                                                         && substr( $text, $wsEnd + 1, 1 ) == "\n"
 342                                                 ) {
 343                                                         // Remove leading whitespace from the end of the accumulator
 344                                                         // Sanity check first though
 345                                                         $wsLength = $i - $wsStart;
 346                                                         if ( $wsLength > 0
 347                                                                 && $accum->lastNode instanceof PPNode_Hash_Text
 348                                                                 && strspn( $accum->lastNode->value, " \t", -$wsLength ) === $wsLength
 349                                                         ) {
 350                                                                 $accum->lastNode->value = substr( $accum->lastNode->value, 0, -$wsLength );
 351                                                         }
 352
 353                                                         // Dump all but the last comment to the accumulator
 354                                                         foreach ( $comments as $j => $com ) {
 355                                                                 $startPos = $com[0];
 356                                                                 $endPos = $com[1] + 1;
 357                                                                 if ( $j == ( count( $comments ) - 1 ) ) {
 358                                                                         break;
 359                                                                 }
 360                                                                 $inner = substr( $text, $startPos, $endPos - $startPos );
 361                                                                 $accum->addNodeWithText( 'comment', $inner );
 362                                                         }
 363
 364                                                         // Do a line-start run next time to look for headings after the comment
 365                                                         $fakeLineStart = true;
 366                                                 } else {
 367                                                         // No line to eat, just take the comment itself
 368                                                         $startPos = $i;
 369                                                         $endPos += 2;
 370                                                 }
 371
 372                                                 if ( $stack->top ) {
 373                                                         $part = $stack->top->getCurrentPart();
 374                                                         if ( !( isset( $part->commentEnd ) && $part->commentEnd == $wsStart - 1 ) ) {
 375                                                                 $part->visualEnd = $wsStart;
 376                                                         }
 377                                                         // Else comments abutting, no change in visual end
 378                                                         $part->commentEnd = $endPos;
 379                                                 }
 380                                                 $i = $endPos + 1;
 381                                                 $inner = substr( $text, $startPos, $endPos - $startPos + 1 );
 382                                                 $accum->addNodeWithText( 'comment', $inner );
 383                                         }
 384                                         continue;
 385                                 }
 386                                 $name = $matches[1];
 387                                 $lowerName = strtolower( $name );
 388                                 $attrStart = $i + strlen( $name ) + 1;
 389
 390                                 // Find end of tag
 391                                 $tagEndPos = $noMoreGT ? false : strpos( $text, '>', $attrStart );
 392                                 if ( $tagEndPos === false ) {
 393                                         // Infinite backtrack
 394                                         // Disable tag search to prevent worst-case O(N^2) performance
 395                                         $noMoreGT = true;
 396                                         $accum->addLiteral( '<' );
 397                                         ++$i;
 398                                         continue;
 399                                 }
 400
 401                                 // Handle ignored tags
 402                                 if ( in_array( $lowerName, $ignoredTags ) ) {
 403                                         $accum->addNodeWithText( 'ignore', substr( $text, $i, $tagEndPos - $i + 1 ) );
 404                                         $i = $tagEndPos + 1;
 405                                         continue;
 406                                 }
 407
 408                                 $tagStartPos = $i;
 409                                 if ( $text[$tagEndPos - 1] == '/' ) {
 410                                         // Short end tag
 411                                         $attrEnd = $tagEndPos - 1;
 412                                         $inner = null;
 413                                         $i = $tagEndPos + 1;
 414                                         $close = null;
 415                                 } else {
 416                                         $attrEnd = $tagEndPos;
 417                                         // Find closing tag
 418                                         if ( preg_match( "/<\/" . preg_quote( $name, '/' ) . "\s*>/i",
 419                                                         $text, $matches, PREG_OFFSET_CAPTURE, $tagEndPos + 1 )
 420                                         ) {
 421                                                 $inner = substr( $text, $tagEndPos + 1, $matches[0][1] - $tagEndPos - 1 );
 422                                                 $i = $matches[0][1] + strlen( $matches[0][0] );
 423                                                 $close = $matches[0][0];
 424                                         } else {
 425                                                 // No end tag -- let it run out to the end of the text.
 426                                                 $inner = substr( $text, $tagEndPos + 1 );
 427                                                 $i = $lengthText;
 428                                                 $close = null;
 429                                         }
 430                                 }
 431                                 // <includeonly> and <noinclude> just become <ignore> tags
 432                                 if ( in_array( $lowerName, $ignoredElements ) ) {
 433                                         $accum->addNodeWithText( 'ignore', substr( $text, $tagStartPos, $i - $tagStartPos ) );
 434                                         continue;
 435                                 }
 436
 437                                 if ( $attrEnd <= $attrStart ) {
 438                                         $attr = '';
 439                                 } else {
 440                                         // Note that the attr element contains the whitespace between name and attribute,
 441                                         // this is necessary for precise reconstruction during pre-save transform.
 442                                         $attr = substr( $text, $attrStart, $attrEnd - $attrStart );
 443                                 }
 444
 445                                 $extNode = new PPNode_Hash_Tree( 'ext' );
 446                                 $extNode->addChild( PPNode_Hash_Tree::newWithText( 'name', $name ) );
 447                                 $extNode->addChild( PPNode_Hash_Tree::newWithText( 'attr', $attr ) );
 448                                 if ( $inner !== null ) {
 449                                         $extNode->addChild( PPNode_Hash_Tree::newWithText( 'inner', $inner ) );
 450                                 }
 451                                 if ( $close !== null ) {
 452                                         $extNode->addChild( PPNode_Hash_Tree::newWithText( 'close', $close ) );
 453                                 }
 454                                 $accum->addNode( $extNode );
 455                         } elseif ( $found == 'line-start' ) {
 456                                 // Is this the start of a heading?
 457                                 // Line break belongs before the heading element in any case
 458                                 if ( $fakeLineStart ) {
 459                                         $fakeLineStart = false;
 460                                 } else {
 461                                         $accum->addLiteral( $curChar );
 462                                         $i++;
 463                                 }
 464
 465                                 $count = strspn( $text, '=', $i, 6 );
 466                                 if ( $count == 1 && $findEquals ) {
 467                                         // DWIM: This looks kind of like a name/value separator.
 468                                         // Let's let the equals handler have it and break the potential
 469                                         // heading. This is heuristic, but AFAICT the methods for
 470                                         // completely correct disambiguation are very complex.
 471                                 } elseif ( $count > 0 ) {
 472                                         $piece = array(
 473                                                 'open' => "\n",
 474                                                 'close' => "\n",
 475                                                 'parts' => array( new PPDPart_Hash( str_repeat( '=', $count ) ) ),
 476                                                 'startPos' => $i,
 477                                                 'count' => $count );
 478                                         $stack->push( $piece );
 479                                         $accum =& $stack->getAccum();
 480                                         extract( $stack->getFlags() );
 481                                         $i += $count;
 482                                 }
 483                         } elseif ( $found == 'line-end' ) {
 484                                 $piece = $stack->top;
 485                                 // A heading must be open, otherwise \n wouldn't have been in the search list
 486                                 assert( '$piece->open == "\n"' );
 487                                 $part = $piece->getCurrentPart();
 488                                 // Search back through the input to see if it has a proper close.
 489                                 // Do this using the reversed string since the other solutions
 490                                 // (end anchor, etc.) are inefficient.
 491                                 $wsLength = strspn( $revText, " \t", $lengthText - $i );
 492                                 $searchStart = $i - $wsLength;
 493                                 if ( isset( $part->commentEnd ) && $searchStart - 1 == $part->commentEnd ) {
 494                                         // Comment found at line end
 495                                         // Search for equals signs before the comment
 496                                         $searchStart = $part->visualEnd;
 497                                         $searchStart -= strspn( $revText, " \t", $lengthText - $searchStart );
 498                                 }
 499                                 $count = $piece->count;
 500                                 $equalsLength = strspn( $revText, '=', $lengthText - $searchStart );
 501                                 if ( $equalsLength > 0 ) {
 502                                         if ( $searchStart - $equalsLength == $piece->startPos ) {
 503                                                 // This is just a single string of equals signs on its own line
 504                                                 // Replicate the doHeadings behavior /={count}(.+)={count}/
 505                                                 // First find out how many equals signs there really are (don't stop at 6)
 506                                                 $count = $equalsLength;
 507                                                 if ( $count < 3 ) {
 508                                                         $count = 0;
 509                                                 } else {
 510                                                         $count = min( 6, intval( ( $count - 1 ) / 2 ) );
 511                                                 }
 512                                         } else {
 513                                                 $count = min( $equalsLength, $count );
 514                                         }
 515                                         if ( $count > 0 ) {
 516                                                 // Normal match, output <h>
 517                                                 $element = new PPNode_Hash_Tree( 'possible-h' );
 518                                                 $element->addChild( new PPNode_Hash_Attr( 'level', $count ) );
 519                                                 $element->addChild( new PPNode_Hash_Attr( 'i', $headingIndex++ ) );
 520                                                 $element->lastChild->nextSibling = $accum->firstNode;
 521                                                 $element->lastChild = $accum->lastNode;
 522                                         } else {
 523                                                 // Single equals sign on its own line, count=0
 524                                                 $element = $accum;
 525                                         }
 526                                 } else {
 527                                         // No match, no <h>, just pass down the inner text
 528                                         $element = $accum;
 529                                 }
 530                                 // Unwind the stack
 531                                 $stack->pop();
 532                                 $accum =& $stack->getAccum();
 533                                 extract( $stack->getFlags() );
 534
 535                                 // Append the result to the enclosing accumulator
 536                                 if ( $element instanceof PPNode ) {
 537                                         $accum->addNode( $element );
 538                                 } else {
 539                                         $accum->addAccum( $element );
 540                                 }
 541                                 // Note that we do NOT increment the input pointer.
 542                                 // This is because the closing linebreak could be the opening linebreak of
 543                                 // another heading. Infinite loops are avoided because the next iteration MUST
 544                                 // hit the heading open case above, which unconditionally increments the
 545                                 // input pointer.
 546                         } elseif ( $found == 'open' ) {
 547                                 # count opening brace characters
 548                                 $count = strspn( $text, $curChar, $i );
 549
 550                                 # we need to add to stack only if opening brace count is enough for one of the rules
 551                                 if ( $count >= $rule['min'] ) {
 552                                         # Add it to the stack
 553                                         $piece = array(
 554                                                 'open' => $curChar,
 555                                                 'close' => $rule['end'],
 556                                                 'count' => $count,
 557                                                 'lineStart' => ( $i > 0 && $text[$i - 1] == "\n" ),
 558                                         );
 559
 560                                         $stack->push( $piece );
 561                                         $accum =& $stack->getAccum();
 562                                         extract( $stack->getFlags() );
 563                                 } else {
 564                                         # Add literal brace(s)
 565                                         $accum->addLiteral( str_repeat( $curChar, $count ) );
 566                                 }
 567                                 $i += $count;
 568                         } elseif ( $found == 'close' ) {
 569                                 $piece = $stack->top;
 570                                 # lets check if there are enough characters for closing brace
 571                                 $maxCount = $piece->count;
 572                                 $count = strspn( $text, $curChar, $i, $maxCount );
 573
 574                                 # check for maximum matching characters (if there are 5 closing
 575                                 # characters, we will probably need only 3 - depending on the rules)
 576                                 $rule = $rules[$piece->open];
 577                                 if ( $count > $rule['max'] ) {
 578                                         # The specified maximum exists in the callback array, unless the caller
 579                                         # has made an error
 580                                         $matchingCount = $rule['max'];
 581                                 } else {
 582                                         # Count is less than the maximum
 583                                         # Skip any gaps in the callback array to find the true largest match
 584                                         # Need to use array_key_exists not isset because the callback can be null
 585                                         $matchingCount = $count;
 586                                         while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $rule['names'] ) ) {
 587                                                 --$matchingCount;
 588                                         }
 589                                 }
 590
 591                                 if ( $matchingCount <= 0 ) {
 592                                         # No matching element found in callback array
 593                                         # Output a literal closing brace and continue
 594                                         $accum->addLiteral( str_repeat( $curChar, $count ) );
 595                                         $i += $count;
 596                                         continue;
 597                                 }
 598                                 $name = $rule['names'][$matchingCount];
 599                                 if ( $name === null ) {
 600                                         // No element, just literal text
 601                                         $element = $piece->breakSyntax( $matchingCount );
 602                                         $element->addLiteral( str_repeat( $rule['end'], $matchingCount ) );
 603                                 } else {
 604                                         # Create XML element
 605                                         # Note: $parts is already XML, does not need to be encoded further
 606                                         $parts = $piece->parts;
 607                                         $titleAccum = $parts[0]->out;
 608                                         unset( $parts[0] );
 609
 610                                         $element = new PPNode_Hash_Tree( $name );
 611
 612                                         # The invocation is at the start of the line if lineStart is set in
 613                                         # the stack, and all opening brackets are used up.
 614                                         if ( $maxCount == $matchingCount && !empty( $piece->lineStart ) ) {
 615                                                 $element->addChild( new PPNode_Hash_Attr( 'lineStart', 1 ) );
 616                                         }
 617                                         $titleNode = new PPNode_Hash_Tree( 'title' );
 618                                         $titleNode->firstChild = $titleAccum->firstNode;
 619                                         $titleNode->lastChild = $titleAccum->lastNode;
 620                                         $element->addChild( $titleNode );
 621                                         $argIndex = 1;
 622                                         foreach ( $parts as $part ) {
 623                                                 if ( isset( $part->eqpos ) ) {
 624                                                         // Find equals
 625                                                         $lastNode = false;
 626                                                         for ( $node = $part->out->firstNode; $node; $node = $node->nextSibling ) {
 627                                                                 if ( $node === $part->eqpos ) {
 628                                                                         break;
 629                                                                 }
 630                                                                 $lastNode = $node;
 631                                                         }
 632                                                         if ( !$node ) {
 633                                                                 if ( $cacheable ) {
 634                                                                 }
 635                                                                 throw new MWException( __METHOD__ . ': eqpos not found' );
 636                                                         }
 637                                                         if ( $node->name !== 'equals' ) {
 638                                                                 if ( $cacheable ) {
 639                                                                 }
 640                                                                 throw new MWException( __METHOD__ . ': eqpos is not equals' );
 641                                                         }
 642                                                         $equalsNode = $node;
 643
 644                                                         // Construct name node
 645                                                         $nameNode = new PPNode_Hash_Tree( 'name' );
 646                                                         if ( $lastNode !== false ) {
 647                                                                 $lastNode->nextSibling = false;
 648                                                                 $nameNode->firstChild = $part->out->firstNode;
 649                                                                 $nameNode->lastChild = $lastNode;
 650                                                         }
 651
 652                                                         // Construct value node
 653                                                         $valueNode = new PPNode_Hash_Tree( 'value' );
 654                                                         if ( $equalsNode->nextSibling !== false ) {
 655                                                                 $valueNode->firstChild = $equalsNode->nextSibling;
 656                                                                 $valueNode->lastChild = $part->out->lastNode;
 657                                                         }
 658                                                         $partNode = new PPNode_Hash_Tree( 'part' );
 659                                                         $partNode->addChild( $nameNode );
 660                                                         $partNode->addChild( $equalsNode->firstChild );
 661                                                         $partNode->addChild( $valueNode );
 662                                                         $element->addChild( $partNode );
 663                                                 } else {
 664                                                         $partNode = new PPNode_Hash_Tree( 'part' );
 665                                                         $nameNode = new PPNode_Hash_Tree( 'name' );
 666                                                         $nameNode->addChild( new PPNode_Hash_Attr( 'index', $argIndex++ ) );
 667                                                         $valueNode = new PPNode_Hash_Tree( 'value' );
 668                                                         $valueNode->firstChild = $part->out->firstNode;
 669                                                         $valueNode->lastChild = $part->out->lastNode;
 670                                                         $partNode->addChild( $nameNode );
 671                                                         $partNode->addChild( $valueNode );
 672                                                         $element->addChild( $partNode );
 673                                                 }
 674                                         }
 675                                 }
 676
 677                                 # Advance input pointer
 678                                 $i += $matchingCount;
 679
 680                                 # Unwind the stack
 681                                 $stack->pop();
 682                                 $accum =& $stack->getAccum();
 683
 684                                 # Re-add the old stack element if it still has unmatched opening characters remaining
 685                                 if ( $matchingCount < $piece->count ) {
 686                                         $piece->parts = array( new PPDPart_Hash );
 687                                         $piece->count -= $matchingCount;
 688                                         # do we still qualify for any callback with remaining count?
 689                                         $min = $rules[$piece->open]['min'];
 690                                         if ( $piece->count >= $min ) {
 691                                                 $stack->push( $piece );
 692                                                 $accum =& $stack->getAccum();
 693                                         } else {
 694                                                 $accum->addLiteral( str_repeat( $piece->open, $piece->count ) );
 695                                         }
 696                                 }
 697
 698                                 extract( $stack->getFlags() );
 699
 700                                 # Add XML element to the enclosing accumulator
 701                                 if ( $element instanceof PPNode ) {
 702                                         $accum->addNode( $element );
 703                                 } else {
 704                                         $accum->addAccum( $element );
 705                                 }
 706                         } elseif ( $found == 'pipe' ) {
 707                                 $findEquals = true; // shortcut for getFlags()
 708                                 $stack->addPart();
 709                                 $accum =& $stack->getAccum();
 710                                 ++$i;
 711                         } elseif ( $found == 'equals' ) {
 712                                 $findEquals = false; // shortcut for getFlags()
 713                                 $accum->addNodeWithText( 'equals', '=' );
 714                                 $stack->getCurrentPart()->eqpos = $accum->lastNode;
 715                                 ++$i;
 716                         }
 717                 }
 718
 719                 # Output any remaining unclosed brackets
 720                 foreach ( $stack->stack as $piece ) {
 721                         $stack->rootAccum->addAccum( $piece->breakSyntax() );
 722                 }
 723
 724                 # Enable top-level headings
 725                 for ( $node = $stack->rootAccum->firstNode; $node; $node = $node->nextSibling ) {
 726                         if ( isset( $node->name ) && $node->name === 'possible-h' ) {
 727                                 $node->name = 'h';
 728                         }
 729                 }
 730
 731                 $rootNode = new PPNode_Hash_Tree( 'root' );
 732                 $rootNode->firstChild = $stack->rootAccum->firstNode;
 733                 $rootNode->lastChild = $stack->rootAccum->lastNode;
 734
 735                 // Cache
 736                 if ( $cacheable ) {
 737                         $cacheValue = sprintf( "%08d", self::CACHE_VERSION ) . serialize( $rootNode );
 738                         $wgMemc->set( $cacheKey, $cacheValue, 86400 );
 739                         wfDebugLog( "Preprocessor", "Saved preprocessor Hash to memcached (key $cacheKey)" );
 740                 }
 741
 742                 return $rootNode;
 743         }
 744 }
 745
 746 /**
 747  * Stack class to help Preprocessor::preprocessToObj()
 748  * @ingroup Parser
 749  * @codingStandardsIgnoreStart
 750  */
 751 class PPDStack_Hash extends PPDStack {
 752         // @codingStandardsIgnoreEnd
 753
 754         public function __construct() {
 755                 $this->elementClass = 'PPDStackElement_Hash';
 756                 parent::__construct();
 757                 $this->rootAccum = new PPDAccum_Hash;
 758         }
 759 }
 760
 761 /**
 762  * @ingroup Parser
 763  * @codingStandardsIgnoreStart
 764  */
 765 class PPDStackElement_Hash extends PPDStackElement {
 766         // @codingStandardsIgnoreENd
 767
 768         public function __construct( $data = array() ) {
 769                 $this->partClass = 'PPDPart_Hash';
 770                 parent::__construct( $data );
 771         }
 772
 773         /**
 774          * Get the accumulator that would result if the close is not found.
 775          *
 776          * @param int|bool $openingCount
 777          * @return PPDAccum_Hash
 778          */
 779         public function breakSyntax( $openingCount = false ) {
 780                 if ( $this->open == "\n" ) {
 781                         $accum = $this->parts[0]->out;
 782                 } else {
 783                         if ( $openingCount === false ) {
 784                                 $openingCount = $this->count;
 785                         }
 786                         $accum = new PPDAccum_Hash;
 787                         $accum->addLiteral( str_repeat( $this->open, $openingCount ) );
 788                         $first = true;
 789                         foreach ( $this->parts as $part ) {
 790                                 if ( $first ) {
 791                                         $first = false;
 792                                 } else {
 793                                         $accum->addLiteral( '|' );
 794                                 }
 795                                 $accum->addAccum( $part->out );
 796                         }
 797                 }
 798                 return $accum;
 799         }
 800 }
 801
 802 /**
 803  * @ingroup Parser
 804  * @codingStandardsIgnoreStart
 805  */
 806 class PPDPart_Hash extends PPDPart {
 807         // @codingStandardsIgnoreEnd
 808
 809         public function __construct( $out = '' ) {
 810                 $accum = new PPDAccum_Hash;
 811                 if ( $out !== '' ) {
 812                         $accum->addLiteral( $out );
 813                 }
 814                 parent::__construct( $accum );
 815         }
 816 }
 817
 818 /**
 819  * @ingroup Parser
 820  * @codingStandardsIgnoreStart
 821  */
 822 class PPDAccum_Hash {
 823         // @codingStandardsIgnoreEnd
 824
 825         public $firstNode, $lastNode;
 826
 827         public function __construct() {
 828                 $this->firstNode = $this->lastNode = false;
 829         }
 830
 831         /**
 832          * Append a string literal
 833          * @param string $s
 834          */
 835         public function addLiteral( $s ) {
 836                 if ( $this->lastNode === false ) {
 837                         $this->firstNode = $this->lastNode = new PPNode_Hash_Text( $s );
 838                 } elseif ( $this->lastNode instanceof PPNode_Hash_Text ) {
 839                         $this->lastNode->value .= $s;
 840                 } else {
 841                         $this->lastNode->nextSibling = new PPNode_Hash_Text( $s );
 842                         $this->lastNode = $this->lastNode->nextSibling;
 843                 }
 844         }
 845
 846         /**
 847          * Append a PPNode
 848          * @param PPNode $node
 849          */
 850         public function addNode( PPNode $node ) {
 851                 if ( $this->lastNode === false ) {
 852                         $this->firstNode = $this->lastNode = $node;
 853                 } else {
 854                         $this->lastNode->nextSibling = $node;
 855                         $this->lastNode = $node;
 856                 }
 857         }
 858
 859         /**
 860          * Append a tree node with text contents
 861          * @param string $name
 862          * @param string $value
 863          */
 864         public function addNodeWithText( $name, $value ) {
 865                 $node = PPNode_Hash_Tree::newWithText( $name, $value );
 866                 $this->addNode( $node );
 867         }
 868
 869         /**
 870          * Append a PPDAccum_Hash
 871          * Takes over ownership of the nodes in the source argument. These nodes may
 872          * subsequently be modified, especially nextSibling.
 873          * @param PPDAccum_Hash $accum
 874          */
 875         public function addAccum( $accum ) {
 876                 if ( $accum->lastNode === false ) {
 877                         // nothing to add
 878                 } elseif ( $this->lastNode === false ) {
 879                         $this->firstNode = $accum->firstNode;
 880                         $this->lastNode = $accum->lastNode;
 881                 } else {
 882                         $this->lastNode->nextSibling = $accum->firstNode;
 883                         $this->lastNode = $accum->lastNode;
 884                 }
 885         }
 886 }
 887
 888 /**
 889  * An expansion frame, used as a context to expand the result of preprocessToObj()
 890  * @ingroup Parser
 891  * @codingStandardsIgnoreStart
 892  */
 893 class PPFrame_Hash implements PPFrame {
 894         // @codingStandardsIgnoreEnd
 895
 896         /**
 897          * @var Parser
 898          */
 899         public $parser;
 900
 901         /**
 902          * @var Preprocessor
 903          */
 904         public $preprocessor;
 905
 906         /**
 907          * @var Title
 908          */
 909         public $title;
 910         public $titleCache;
 911
 912         /**
 913          * Hashtable listing templates which are disallowed for expansion in this frame,
 914          * having been encountered previously in parent frames.
 915          */
 916         public $loopCheckHash;
 917
 918         /**
 919          * Recursion depth of this frame, top = 0
 920          * Note that this is NOT the same as expansion depth in expand()
 921          */
 922         public $depth;
 923
 924         private $volatile = false;
 925         private $ttl = null;
 926
 927         /**
 928          * @var array
 929          */
 930         protected $childExpansionCache;
 931
 932         /**
 933          * Construct a new preprocessor frame.
 934          * @param Preprocessor $preprocessor The parent preprocessor
 935          */
 936         public function __construct( $preprocessor ) {
 937                 $this->preprocessor = $preprocessor;
 938                 $this->parser = $preprocessor->parser;
 939                 $this->title = $this->parser->mTitle;
 940                 $this->titleCache = array( $this->title ? $this->title->getPrefixedDBkey() : false );
 941                 $this->loopCheckHash = array();
 942                 $this->depth = 0;
 943                 $this->childExpansionCache = array();
 944         }
 945
 946         /**
 947          * Create a new child frame
 948          * $args is optionally a multi-root PPNode or array containing the template arguments
 949          *
 950          * @param array|bool|PPNode_Hash_Array $args
 951          * @param Title|bool $title
 952          * @param int $indexOffset
 953          * @throws MWException
 954          * @return PPTemplateFrame_Hash
 955          */
 956         public function newChild( $args = false, $title = false, $indexOffset = 0 ) {
 957                 $namedArgs = array();
 958                 $numberedArgs = array();
 959                 if ( $title === false ) {
 960                         $title = $this->title;
 961                 }
 962                 if ( $args !== false ) {
 963                         if ( $args instanceof PPNode_Hash_Array ) {
 964                                 $args = $args->value;
 965                         } elseif ( !is_array( $args ) ) {
 966                                 throw new MWException( __METHOD__ . ': $args must be array or PPNode_Hash_Array' );
 967                         }
 968                         foreach ( $args as $arg ) {
 969                                 $bits = $arg->splitArg();
 970                                 if ( $bits['index'] !== '' ) {
 971                                         // Numbered parameter
 972                                         $index = $bits['index'] - $indexOffset;
 973                                         if ( isset( $namedArgs[$index] ) || isset( $numberedArgs[$index] ) ) {
 974                                                 $this->parser->getOutput()->addWarning( wfMessage( 'duplicate-args-warning',
 975                                                         wfEscapeWikiText( $this->title ),
 976                                                         wfEscapeWikiText( $title ),
 977                                                         wfEscapeWikiText( $index ) )->text() );
 978                                                 $this->parser->addTrackingCategory( 'duplicate-args-category' );
 979                                         }
 980                                         $numberedArgs[$index] = $bits['value'];
 981                                         unset( $namedArgs[$index] );
 982                                 } else {
 983                                         // Named parameter
 984                                         $name = trim( $this->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
 985                                         if ( isset( $namedArgs[$name] ) || isset( $numberedArgs[$name] ) ) {
 986                                                 $this->parser->getOutput()->addWarning( wfMessage( 'duplicate-args-warning',
 987                                                         wfEscapeWikiText( $this->title ),
 988                                                         wfEscapeWikiText( $title ),
 989                                                         wfEscapeWikiText( $name ) )->text() );
 990                                                 $this->parser->addTrackingCategory( 'duplicate-args-category' );
 991                                         }
 992                                         $namedArgs[$name] = $bits['value'];
 993                                         unset( $numberedArgs[$name] );
 994                                 }
 995                         }
 996                 }
 997                 return new PPTemplateFrame_Hash( $this->preprocessor, $this, $numberedArgs, $namedArgs, $title );
 998         }
 999
1000         /**
1001          * @throws MWException
1002          * @param string|int $key
1003          * @param string|PPNode $root
1004          * @param int $flags
1005          * @return string
1006          */
1007         public function cachedExpand( $key, $root, $flags = 0 ) {
1008                 // we don't have a parent, so we don't have a cache
1009                 return $this->expand( $root, $flags );
1010         }
1011
1012         /**
1013          * @throws MWException
1014          * @param string|PPNode $root
1015          * @param int $flags
1016          * @return string
1017          */
1018         public function expand( $root, $flags = 0 ) {
1019                 static $expansionDepth = 0;
1020                 if ( is_string( $root ) ) {
1021                         return $root;
1022                 }
1023
1024                 if ( ++$this->parser->mPPNodeCount > $this->parser->mOptions->getMaxPPNodeCount() ) {
1025                         $this->parser->limitationWarn( 'node-count-exceeded',
1026                                         $this->parser->mPPNodeCount,
1027                                         $this->parser->mOptions->getMaxPPNodeCount()
1028                         );
1029                         return '<span class="error">Node-count limit exceeded</span>';
1030                 }
1031                 if ( $expansionDepth > $this->parser->mOptions->getMaxPPExpandDepth() ) {
1032                         $this->parser->limitationWarn( 'expansion-depth-exceeded',
1033                                         $expansionDepth,
1034                                         $this->parser->mOptions->getMaxPPExpandDepth()
1035                         );
1036                         return '<span class="error">Expansion depth limit exceeded</span>';
1037                 }
1038                 ++$expansionDepth;
1039                 if ( $expansionDepth > $this->parser->mHighestExpansionDepth ) {
1040                         $this->parser->mHighestExpansionDepth = $expansionDepth;
1041                 }
1042
1043                 $outStack = array( '', '' );
1044                 $iteratorStack = array( false, $root );
1045                 $indexStack = array( 0, 0 );
1046
1047                 while ( count( $iteratorStack ) > 1 ) {
1048                         $level = count( $outStack ) - 1;
1049                         $iteratorNode =& $iteratorStack[$level];
1050                         $out =& $outStack[$level];
1051                         $index =& $indexStack[$level];
1052
1053                         if ( is_array( $iteratorNode ) ) {
1054                                 if ( $index >= count( $iteratorNode ) ) {
1055                                         // All done with this iterator
1056                                         $iteratorStack[$level] = false;
1057                                         $contextNode = false;
1058                                 } else {
1059                                         $contextNode = $iteratorNode[$index];
1060                                         $index++;
1061                                 }
1062                         } elseif ( $iteratorNode instanceof PPNode_Hash_Array ) {
1063                                 if ( $index >= $iteratorNode->getLength() ) {
1064                                         // All done with this iterator
1065                                         $iteratorStack[$level] = false;
1066                                         $contextNode = false;
1067                                 } else {
1068                                         $contextNode = $iteratorNode->item( $index );
1069                                         $index++;
1070                                 }
1071                         } else {
1072                                 // Copy to $contextNode and then delete from iterator stack,
1073                                 // because this is not an iterator but we do have to execute it once
1074                                 $contextNode = $iteratorStack[$level];
1075                                 $iteratorStack[$level] = false;
1076                         }
1077
1078                         $newIterator = false;
1079
1080                         if ( $contextNode === false ) {
1081                                 // nothing to do
1082                         } elseif ( is_string( $contextNode ) ) {
1083                                 $out .= $contextNode;
1084                         } elseif ( is_array( $contextNode ) || $contextNode instanceof PPNode_Hash_Array ) {
1085                                 $newIterator = $contextNode;
1086                         } elseif ( $contextNode instanceof PPNode_Hash_Attr ) {
1087                                 // No output
1088                         } elseif ( $contextNode instanceof PPNode_Hash_Text ) {
1089                                 $out .= $contextNode->value;
1090                         } elseif ( $contextNode instanceof PPNode_Hash_Tree ) {
1091                                 if ( $contextNode->name == 'template' ) {
1092                                         # Double-brace expansion
1093                                         $bits = $contextNode->splitTemplate();
1094                                         if ( $flags & PPFrame::NO_TEMPLATES ) {
1095                                                 $newIterator = $this->virtualBracketedImplode(
1096                                                         '{{', '|', '}}',
1097                                                         $bits['title'],
1098                                                         $bits['parts']
1099                                                 );
1100                                         } else {
1101                                                 $ret = $this->parser->braceSubstitution( $bits, $this );
1102                                                 if ( isset( $ret['object'] ) ) {
1103                                                         $newIterator = $ret['object'];
1104                                                 } else {
1105                                                         $out .= $ret['text'];
1106                                                 }
1107                                         }
1108                                 } elseif ( $contextNode->name == 'tplarg' ) {
1109                                         # Triple-brace expansion
1110                                         $bits = $contextNode->splitTemplate();
1111                                         if ( $flags & PPFrame::NO_ARGS ) {
1112                                                 $newIterator = $this->virtualBracketedImplode(
1113                                                         '{{{', '|', '}}}',
1114                                                         $bits['title'],
1115                                                         $bits['parts']
1116                                                 );
1117                                         } else {
1118                                                 $ret = $this->parser->argSubstitution( $bits, $this );
1119                                                 if ( isset( $ret['object'] ) ) {
1120                                                         $newIterator = $ret['object'];
1121                                                 } else {
1122                                                         $out .= $ret['text'];
1123                                                 }
1124                                         }
1125                                 } elseif ( $contextNode->name == 'comment' ) {
1126                                         # HTML-style comment
1127                                         # Remove it in HTML, pre+remove and STRIP_COMMENTS modes
1128                                         if ( $this->parser->ot['html']
1129                                                 || ( $this->parser->ot['pre'] && $this->parser->mOptions->getRemoveComments() )
1130                                                 || ( $flags & PPFrame::STRIP_COMMENTS )
1131                                         ) {
1132                                                 $out .= '';
1133                                         } elseif ( $this->parser->ot['wiki'] && !( $flags & PPFrame::RECOVER_COMMENTS ) ) {
1134                                                 # Add a strip marker in PST mode so that pstPass2() can
1135                                                 # run some old-fashioned regexes on the result.
1136                                                 # Not in RECOVER_COMMENTS mode (extractSections) though.
1137                                                 $out .= $this->parser->insertStripItem( $contextNode->firstChild->value );
1138                                         } else {
1139                                                 # Recover the literal comment in RECOVER_COMMENTS and pre+no-remove
1140                                                 $out .= $contextNode->firstChild->value;
1141                                         }
1142                                 } elseif ( $contextNode->name == 'ignore' ) {
1143                                         # Output suppression used by <includeonly> etc.
1144                                         # OT_WIKI will only respect <ignore> in substed templates.
1145                                         # The other output types respect it unless NO_IGNORE is set.
1146                                         # extractSections() sets NO_IGNORE and so never respects it.
1147                                         if ( ( !isset( $this->parent ) && $this->parser->ot['wiki'] )
1148                                                 || ( $flags & PPFrame::NO_IGNORE )
1149                                         ) {
1150                                                 $out .= $contextNode->firstChild->value;
1151                                         } else {
1152                                                 //$out .= '';
1153                                         }
1154                                 } elseif ( $contextNode->name == 'ext' ) {
1155                                         # Extension tag
1156                                         $bits = $contextNode->splitExt() + array( 'attr' => null, 'inner' => null, 'close' => null );
1157                                         if ( $flags & PPFrame::NO_TAGS ) {
1158                                                 $s = '<' . $bits['name']->firstChild->value;
1159                                                 if ( $bits['attr'] ) {
1160                                                         $s .= $bits['attr']->firstChild->value;
1161                                                 }
1162                                                 if ( $bits['inner'] ) {
1163                                                         $s .= '>' . $bits['inner']->firstChild->value;
1164                                                         if ( $bits['close'] ) {
1165                                                                 $s .= $bits['close']->firstChild->value;
1166                                                         }
1167                                                 } else {
1168                                                         $s .= '/>';
1169                                                 }
1170                                                 $out .= $s;
1171                                         } else {
1172                                                 $out .= $this->parser->extensionSubstitution( $bits, $this );
1173                                         }
1174                                 } elseif ( $contextNode->name == 'h' ) {
1175                                         # Heading
1176                                         if ( $this->parser->ot['html'] ) {
1177                                                 # Expand immediately and insert heading index marker
1178                                                 $s = '';
1179                                                 for ( $node = $contextNode->firstChild; $node; $node = $node->nextSibling ) {
1180                                                         $s .= $this->expand( $node, $flags );
1181                                                 }
1182
1183                                                 $bits = $contextNode->splitHeading();
1184                                                 $titleText = $this->title->getPrefixedDBkey();
1185                                                 $this->parser->mHeadings[] = array( $titleText, $bits['i'] );
1186                                                 $serial = count( $this->parser->mHeadings ) - 1;
1187                                                 $marker = Parser::MARKER_PREFIX . "-h-$serial-" . Parser::MARKER_SUFFIX;
1188                                                 $s = substr( $s, 0, $bits['level'] ) . $marker . substr( $s, $bits['level'] );
1189                                                 $this->parser->mStripState->addGeneral( $marker, '' );
1190                                                 $out .= $s;
1191                                         } else {
1192                                                 # Expand in virtual stack
1193                                                 $newIterator = $contextNode->getChildren();
1194                                         }
1195                                 } else {
1196                                         # Generic recursive expansion
1197                                         $newIterator = $contextNode->getChildren();
1198                                 }
1199                         } else {
1200                                 throw new MWException( __METHOD__ . ': Invalid parameter type' );
1201                         }
1202
1203                         if ( $newIterator !== false ) {
1204                                 $outStack[] = '';
1205                                 $iteratorStack[] = $newIterator;
1206                                 $indexStack[] = 0;
1207                         } elseif ( $iteratorStack[$level] === false ) {
1208                                 // Return accumulated value to parent
1209                                 // With tail recursion
1210                                 while ( $iteratorStack[$level] === false && $level > 0 ) {
1211                                         $outStack[$level - 1] .= $out;
1212                                         array_pop( $outStack );
1213                                         array_pop( $iteratorStack );
1214                                         array_pop( $indexStack );
1215                                         $level--;
1216                                 }
1217                         }
1218                 }
1219                 --$expansionDepth;
1220                 return $outStack[0];
1221         }
1222
1223         /**
1224          * @param string $sep
1225          * @param int $flags
1226          * @param string|PPNode $args,...
1227          * @return string
1228          */
1229         public function implodeWithFlags( $sep, $flags /*, ... */ ) {
1230                 $args = array_slice( func_get_args(), 2 );
1231
1232                 $first = true;
1233                 $s = '';
1234                 foreach ( $args as $root ) {
1235                         if ( $root instanceof PPNode_Hash_Array ) {
1236                                 $root = $root->value;
1237                         }
1238                         if ( !is_array( $root ) ) {
1239                                 $root = array( $root );
1240                         }
1241                         foreach ( $root as $node ) {
1242                                 if ( $first ) {
1243                                         $first = false;
1244                                 } else {
1245                                         $s .= $sep;
1246                                 }
1247                                 $s .= $this->expand( $node, $flags );
1248                         }
1249                 }
1250                 return $s;
1251         }
1252
1253         /**
1254          * Implode with no flags specified
1255          * This previously called implodeWithFlags but has now been inlined to reduce stack depth
1256          * @param string $sep
1257          * @param string|PPNode $args,...
1258          * @return string
1259          */
1260         public function implode( $sep /*, ... */ ) {
1261                 $args = array_slice( func_get_args(), 1 );
1262
1263                 $first = true;
1264                 $s = '';
1265                 foreach ( $args as $root ) {
1266                         if ( $root instanceof PPNode_Hash_Array ) {
1267                                 $root = $root->value;
1268                         }
1269                         if ( !is_array( $root ) ) {
1270                                 $root = array( $root );
1271                         }
1272                         foreach ( $root as $node ) {
1273                                 if ( $first ) {
1274                                         $first = false;
1275                                 } else {
1276                                         $s .= $sep;
1277                                 }
1278                                 $s .= $this->expand( $node );
1279                         }
1280                 }
1281                 return $s;
1282         }
1283
1284         /**
1285          * Makes an object that, when expand()ed, will be the same as one obtained
1286          * with implode()
1287          *
1288          * @param string $sep
1289          * @param string|PPNode $args,...
1290          * @return PPNode_Hash_Array
1291          */
1292         public function virtualImplode( $sep /*, ... */ ) {
1293                 $args = array_slice( func_get_args(), 1 );
1294                 $out = array();
1295                 $first = true;
1296
1297                 foreach ( $args as $root ) {
1298                         if ( $root instanceof PPNode_Hash_Array ) {
1299                                 $root = $root->value;
1300                         }
1301                         if ( !is_array( $root ) ) {
1302                                 $root = array( $root );
1303                         }
1304                         foreach ( $root as $node ) {
1305                                 if ( $first ) {
1306                                         $first = false;
1307                                 } else {
1308                                         $out[] = $sep;
1309                                 }
1310                                 $out[] = $node;
1311                         }
1312                 }
1313                 return new PPNode_Hash_Array( $out );
1314         }
1315
1316         /**
1317          * Virtual implode with brackets
1318          *
1319          * @param string $start
1320          * @param string $sep
1321          * @param string $end
1322          * @param string|PPNode $args,...
1323          * @return PPNode_Hash_Array
1324          */
1325         public function virtualBracketedImplode( $start, $sep, $end /*, ... */ ) {
1326                 $args = array_slice( func_get_args(), 3 );
1327                 $out = array( $start );
1328                 $first = true;
1329
1330                 foreach ( $args as $root ) {
1331                         if ( $root instanceof PPNode_Hash_Array ) {
1332                                 $root = $root->value;
1333                         }
1334                         if ( !is_array( $root ) ) {
1335                                 $root = array( $root );
1336                         }
1337                         foreach ( $root as $node ) {
1338                                 if ( $first ) {
1339                                         $first = false;
1340                                 } else {
1341                                         $out[] = $sep;
1342                                 }
1343                                 $out[] = $node;
1344                         }
1345                 }
1346                 $out[] = $end;
1347                 return new PPNode_Hash_Array( $out );
1348         }
1349
1350         public function __toString() {
1351                 return 'frame{}';
1352         }
1353
1354         /**
1355          * @param bool $level
1356          * @return array|bool|string
1357          */
1358         public function getPDBK( $level = false ) {
1359                 if ( $level === false ) {
1360                         return $this->title->getPrefixedDBkey();
1361                 } else {
1362                         return isset( $this->titleCache[$level] ) ? $this->titleCache[$level] : false;
1363                 }
1364         }
1365
1366         /**
1367          * @return array
1368          */
1369         public function getArguments() {
1370                 return array();
1371         }
1372
1373         /**
1374          * @return array
1375          */
1376         public function getNumberedArguments() {
1377                 return array();
1378         }
1379
1380         /**
1381          * @return array
1382          */
1383         public function getNamedArguments() {
1384                 return array();
1385         }
1386
1387         /**
1388          * Returns true if there are no arguments in this frame
1389          *
1390          * @return bool
1391          */
1392         public function isEmpty() {
1393                 return true;
1394         }
1395
1396         /**
1397          * @param string $name
1398          * @return bool
1399          */
1400         public function getArgument( $name ) {
1401                 return false;
1402         }
1403
1404         /**
1405          * Returns true if the infinite loop check is OK, false if a loop is detected
1406          *
1407          * @param Title $title
1408          *
1409          * @return bool
1410          */
1411         public function loopCheck( $title ) {
1412                 return !isset( $this->loopCheckHash[$title->getPrefixedDBkey()] );
1413         }
1414
1415         /**
1416          * Return true if the frame is a template frame
1417          *
1418          * @return bool
1419          */
1420         public function isTemplate() {
1421                 return false;
1422         }
1423
1424         /**
1425          * Get a title of frame
1426          *
1427          * @return Title
1428          */
1429         public function getTitle() {
1430                 return $this->title;
1431         }
1432
1433         /**
1434          * Set the volatile flag
1435          *
1436          * @param bool $flag
1437          */
1438         public function setVolatile( $flag = true ) {
1439                 $this->volatile = $flag;
1440         }
1441
1442         /**
1443          * Get the volatile flag
1444          *
1445          * @return bool
1446          */
1447         public function isVolatile() {
1448                 return $this->volatile;
1449         }
1450
1451         /**
1452          * Set the TTL
1453          *
1454          * @param int $ttl
1455          */
1456         public function setTTL( $ttl ) {
1457                 if ( $ttl !== null && ( $this->ttl === null || $ttl < $this->ttl ) ) {
1458                         $this->ttl = $ttl;
1459                 }
1460         }
1461
1462         /**
1463          * Get the TTL
1464          *
1465          * @return int|null
1466          */
1467         public function getTTL() {
1468                 return $this->ttl;
1469         }
1470 }
1471
1472 /**
1473  * Expansion frame with template arguments
1474  * @ingroup Parser
1475  * @codingStandardsIgnoreStart
1476  */
1477 class PPTemplateFrame_Hash extends PPFrame_Hash {
1478         // @codingStandardsIgnoreEnd
1479
1480         public $numberedArgs, $namedArgs, $parent;
1481         public $numberedExpansionCache, $namedExpansionCache;
1482
1483         /**
1484          * @param Preprocessor $preprocessor
1485          * @param bool|PPFrame $parent
1486          * @param array $numberedArgs
1487          * @param array $namedArgs
1488          * @param bool|Title $title
1489          */
1490         public function __construct( $preprocessor, $parent = false, $numberedArgs = array(),
1491                 $namedArgs = array(), $title = false
1492         ) {
1493                 parent::__construct( $preprocessor );
1494
1495                 $this->parent = $parent;
1496                 $this->numberedArgs = $numberedArgs;
1497                 $this->namedArgs = $namedArgs;
1498                 $this->title = $title;
1499                 $pdbk = $title ? $title->getPrefixedDBkey() : false;
1500                 $this->titleCache = $parent->titleCache;
1501                 $this->titleCache[] = $pdbk;
1502                 $this->loopCheckHash = /*clone*/ $parent->loopCheckHash;
1503                 if ( $pdbk !== false ) {
1504                         $this->loopCheckHash[$pdbk] = true;
1505                 }
1506                 $this->depth = $parent->depth + 1;
1507                 $this->numberedExpansionCache = $this->namedExpansionCache = array();
1508         }
1509
1510         public function __toString() {
1511                 $s = 'tplframe{';
1512                 $first = true;
1513                 $args = $this->numberedArgs + $this->namedArgs;
1514                 foreach ( $args as $name => $value ) {
1515                         if ( $first ) {
1516                                 $first = false;
1517                         } else {
1518                                 $s .= ', ';
1519                         }
1520                         $s .= "\"$name\":\"" .
1521                                 str_replace( '"', '\\"', $value->__toString() ) . '"';
1522                 }
1523                 $s .= '}';
1524                 return $s;
1525         }
1526
1527         /**
1528          * @throws MWException
1529          * @param string|int $key
1530          * @param string|PPNode $root
1531          * @param int $flags
1532          * @return string
1533          */
1534         public function cachedExpand( $key, $root, $flags = 0 ) {
1535                 if ( isset( $this->parent->childExpansionCache[$key] ) ) {
1536                         return $this->parent->childExpansionCache[$key];
1537                 }
1538                 $retval = $this->expand( $root, $flags );
1539                 if ( !$this->isVolatile() ) {
1540                         $this->parent->childExpansionCache[$key] = $retval;
1541                 }
1542                 return $retval;
1543         }
1544
1545         /**
1546          * Returns true if there are no arguments in this frame
1547          *
1548          * @return bool
1549          */
1550         public function isEmpty() {
1551                 return !count( $this->numberedArgs ) && !count( $this->namedArgs );
1552         }
1553
1554         /**
1555          * @return array
1556          */
1557         public function getArguments() {
1558                 $arguments = array();
1559                 foreach ( array_merge(
1560                                 array_keys( $this->numberedArgs ),
1561                                 array_keys( $this->namedArgs ) ) as $key ) {
1562                         $arguments[$key] = $this->getArgument( $key );
1563                 }
1564                 return $arguments;
1565         }
1566
1567         /**
1568          * @return array
1569          */
1570         public function getNumberedArguments() {
1571                 $arguments = array();
1572                 foreach ( array_keys( $this->numberedArgs ) as $key ) {
1573                         $arguments[$key] = $this->getArgument( $key );
1574                 }
1575                 return $arguments;
1576         }
1577
1578         /**
1579          * @return array
1580          */
1581         public function getNamedArguments() {
1582                 $arguments = array();
1583                 foreach ( array_keys( $this->namedArgs ) as $key ) {
1584                         $arguments[$key] = $this->getArgument( $key );
1585                 }
1586                 return $arguments;
1587         }
1588
1589         /**
1590          * @param int $index
1591          * @return array|bool
1592          */
1593         public function getNumberedArgument( $index ) {
1594                 if ( !isset( $this->numberedArgs[$index] ) ) {
1595                         return false;
1596                 }
1597                 if ( !isset( $this->numberedExpansionCache[$index] ) ) {
1598                         # No trimming for unnamed arguments
1599                         $this->numberedExpansionCache[$index] = $this->parent->expand(
1600                                 $this->numberedArgs[$index],
1601                                 PPFrame::STRIP_COMMENTS
1602                         );
1603                 }
1604                 return $this->numberedExpansionCache[$index];
1605         }
1606
1607         /**
1608          * @param string $name
1609          * @return bool
1610          */
1611         public function getNamedArgument( $name ) {
1612                 if ( !isset( $this->namedArgs[$name] ) ) {
1613                         return false;
1614                 }
1615                 if ( !isset( $this->namedExpansionCache[$name] ) ) {
1616                         # Trim named arguments post-expand, for backwards compatibility
1617                         $this->namedExpansionCache[$name] = trim(
1618                                 $this->parent->expand( $this->namedArgs[$name], PPFrame::STRIP_COMMENTS ) );
1619                 }
1620                 return $this->namedExpansionCache[$name];
1621         }
1622
1623         /**
1624          * @param string $name
1625          * @return array|bool
1626          */
1627         public function getArgument( $name ) {
1628                 $text = $this->getNumberedArgument( $name );
1629                 if ( $text === false ) {
1630                         $text = $this->getNamedArgument( $name );
1631                 }
1632                 return $text;
1633         }
1634
1635         /**
1636          * Return true if the frame is a template frame
1637          *
1638          * @return bool
1639          */
1640         public function isTemplate() {
1641                 return true;
1642         }
1643
1644         public function setVolatile( $flag = true ) {
1645                 parent::setVolatile( $flag );
1646                 $this->parent->setVolatile( $flag );
1647         }
1648
1649         public function setTTL( $ttl ) {
1650                 parent::setTTL( $ttl );
1651                 $this->parent->setTTL( $ttl );
1652         }
1653 }
1654
1655 /**
1656  * Expansion frame with custom arguments
1657  * @ingroup Parser
1658  * @codingStandardsIgnoreStart
1659  */
1660 class PPCustomFrame_Hash extends PPFrame_Hash {
1661         // @codingStandardsIgnoreEnd
1662
1663         public $args;
1664
1665         public function __construct( $preprocessor, $args ) {
1666                 parent::__construct( $preprocessor );
1667                 $this->args = $args;
1668         }
1669
1670         public function __toString() {
1671                 $s = 'cstmframe{';
1672                 $first = true;
1673                 foreach ( $this->args as $name => $value ) {
1674                         if ( $first ) {
1675                                 $first = false;
1676                         } else {
1677                                 $s .= ', ';
1678                         }
1679                         $s .= "\"$name\":\"" .
1680                                 str_replace( '"', '\\"', $value->__toString() ) . '"';
1681                 }
1682                 $s .= '}';
1683                 return $s;
1684         }
1685
1686         /**
1687          * @return bool
1688          */
1689         public function isEmpty() {
1690                 return !count( $this->args );
1691         }
1692
1693         /**
1694          * @param int $index
1695          * @return bool
1696          */
1697         public function getArgument( $index ) {
1698                 if ( !isset( $this->args[$index] ) ) {
1699                         return false;
1700                 }
1701                 return $this->args[$index];
1702         }
1703
1704         public function getArguments() {
1705                 return $this->args;
1706         }
1707 }
1708
1709 /**
1710  * @ingroup Parser
1711  * @codingStandardsIgnoreStart
1712  */
1713 class PPNode_Hash_Tree implements PPNode {
1714         // @codingStandardsIgnoreEnd
1715
1716         public $name, $firstChild, $lastChild, $nextSibling;
1717
1718         public function __construct( $name ) {
1719                 $this->name = $name;
1720                 $this->firstChild = $this->lastChild = $this->nextSibling = false;
1721         }
1722
1723         public function __toString() {
1724                 $inner = '';
1725                 $attribs = '';
1726                 for ( $node = $this->firstChild; $node; $node = $node->nextSibling ) {
1727                         if ( $node instanceof PPNode_Hash_Attr ) {
1728                                 $attribs .= ' ' . $node->name . '="' . htmlspecialchars( $node->value ) . '"';
1729                         } else {
1730                                 $inner .= $node->__toString();
1731                         }
1732                 }
1733                 if ( $inner === '' ) {
1734                         return "<{$this->name}$attribs/>";
1735                 } else {
1736                         return "<{$this->name}$attribs>$inner</{$this->name}>";
1737                 }
1738         }
1739
1740         /**
1741          * @param string $name
1742          * @param string $text
1743          * @return PPNode_Hash_Tree
1744          */
1745         public static function newWithText( $name, $text ) {
1746                 $obj = new self( $name );
1747                 $obj->addChild( new PPNode_Hash_Text( $text ) );
1748                 return $obj;
1749         }
1750
1751         public function addChild( $node ) {
1752                 if ( $this->lastChild === false ) {
1753                         $this->firstChild = $this->lastChild = $node;
1754                 } else {
1755                         $this->lastChild->nextSibling = $node;
1756                         $this->lastChild = $node;
1757                 }
1758         }
1759
1760         /**
1761          * @return PPNode_Hash_Array
1762          */
1763         public function getChildren() {
1764                 $children = array();
1765                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1766                         $children[] = $child;
1767                 }
1768                 return new PPNode_Hash_Array( $children );
1769         }
1770
1771         public function getFirstChild() {
1772                 return $this->firstChild;
1773         }
1774
1775         public function getNextSibling() {
1776                 return $this->nextSibling;
1777         }
1778
1779         public function getChildrenOfType( $name ) {
1780                 $children = array();
1781                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1782                         if ( isset( $child->name ) && $child->name === $name ) {
1783                                 $children[] = $child;
1784                         }
1785                 }
1786                 return $children;
1787         }
1788
1789         /**
1790          * @return bool
1791          */
1792         public function getLength() {
1793                 return false;
1794         }
1795
1796         /**
1797          * @param int $i
1798          * @return bool
1799          */
1800         public function item( $i ) {
1801                 return false;
1802         }
1803
1804         /**
1805          * @return string
1806          */
1807         public function getName() {
1808                 return $this->name;
1809         }
1810
1811         /**
1812          * Split a "<part>" node into an associative array containing:
1813          *  - name          PPNode name
1814          *  - index         String index
1815          *  - value         PPNode value
1816          *
1817          * @throws MWException
1818          * @return array
1819          */
1820         public function splitArg() {
1821                 $bits = array();
1822                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1823                         if ( !isset( $child->name ) ) {
1824                                 continue;
1825                         }
1826                         if ( $child->name === 'name' ) {
1827                                 $bits['name'] = $child;
1828                                 if ( $child->firstChild instanceof PPNode_Hash_Attr
1829                                         && $child->firstChild->name === 'index'
1830                                 ) {
1831                                         $bits['index'] = $child->firstChild->value;
1832                                 }
1833                         } elseif ( $child->name === 'value' ) {
1834                                 $bits['value'] = $child;
1835                         }
1836                 }
1837
1838                 if ( !isset( $bits['name'] ) ) {
1839                         throw new MWException( 'Invalid brace node passed to ' . __METHOD__ );
1840                 }
1841                 if ( !isset( $bits['index'] ) ) {
1842                         $bits['index'] = '';
1843                 }
1844                 return $bits;
1845         }
1846
1847         /**
1848          * Split an "<ext>" node into an associative array containing name, attr, inner and close
1849          * All values in the resulting array are PPNodes. Inner and close are optional.
1850          *
1851          * @throws MWException
1852          * @return array
1853          */
1854         public function splitExt() {
1855                 $bits = array();
1856                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1857                         if ( !isset( $child->name ) ) {
1858                                 continue;
1859                         }
1860                         if ( $child->name == 'name' ) {
1861                                 $bits['name'] = $child;
1862                         } elseif ( $child->name == 'attr' ) {
1863                                 $bits['attr'] = $child;
1864                         } elseif ( $child->name == 'inner' ) {
1865                                 $bits['inner'] = $child;
1866                         } elseif ( $child->name == 'close' ) {
1867                                 $bits['close'] = $child;
1868                         }
1869                 }
1870                 if ( !isset( $bits['name'] ) ) {
1871                         throw new MWException( 'Invalid ext node passed to ' . __METHOD__ );
1872                 }
1873                 return $bits;
1874         }
1875
1876         /**
1877          * Split an "<h>" node
1878          *
1879          * @throws MWException
1880          * @return array
1881          */
1882         public function splitHeading() {
1883                 if ( $this->name !== 'h' ) {
1884                         throw new MWException( 'Invalid h node passed to ' . __METHOD__ );
1885                 }
1886                 $bits = array();
1887                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1888                         if ( !isset( $child->name ) ) {
1889                                 continue;
1890                         }
1891                         if ( $child->name == 'i' ) {
1892                                 $bits['i'] = $child->value;
1893                         } elseif ( $child->name == 'level' ) {
1894                                 $bits['level'] = $child->value;
1895                         }
1896                 }
1897                 if ( !isset( $bits['i'] ) ) {
1898                         throw new MWException( 'Invalid h node passed to ' . __METHOD__ );
1899                 }
1900                 return $bits;
1901         }
1902
1903         /**
1904          * Split a "<template>" or "<tplarg>" node
1905          *
1906          * @throws MWException
1907          * @return array
1908          */
1909         public function splitTemplate() {
1910                 $parts = array();
1911                 $bits = array( 'lineStart' => '' );
1912                 for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
1913                         if ( !isset( $child->name ) ) {
1914                                 continue;
1915                         }
1916                         if ( $child->name == 'title' ) {
1917                                 $bits['title'] = $child;
1918                         }
1919                         if ( $child->name == 'part' ) {
1920                                 $parts[] = $child;
1921                         }
1922                         if ( $child->name == 'lineStart' ) {
1923                                 $bits['lineStart'] = '1';
1924                         }
1925                 }
1926                 if ( !isset( $bits['title'] ) ) {
1927                         throw new MWException( 'Invalid node passed to ' . __METHOD__ );
1928                 }
1929                 $bits['parts'] = new PPNode_Hash_Array( $parts );
1930                 return $bits;
1931         }
1932 }
1933
1934 /**
1935  * @ingroup Parser
1936  * @codingStandardsIgnoreStart
1937  */
1938 class PPNode_Hash_Text implements PPNode {
1939         // @codingStandardsIgnoreEnd
1940
1941         public $value, $nextSibling;
1942
1943         public function __construct( $value ) {
1944                 if ( is_object( $value ) ) {
1945                         throw new MWException( __CLASS__ . ' given object instead of string' );
1946                 }
1947                 $this->value = $value;
1948         }
1949
1950         public function __toString() {
1951                 return htmlspecialchars( $this->value );
1952         }
1953
1954         public function getNextSibling() {
1955                 return $this->nextSibling;
1956         }
1957
1958         public function getChildren() {
1959                 return false;
1960         }
1961
1962         public function getFirstChild() {
1963                 return false;
1964         }
1965
1966         public function getChildrenOfType( $name ) {
1967                 return false;
1968         }
1969
1970         public function getLength() {
1971                 return false;
1972         }
1973
1974         public function item( $i ) {
1975                 return false;
1976         }
1977
1978         public function getName() {
1979                 return '#text';
1980         }
1981
1982         public function splitArg() {
1983                 throw new MWException( __METHOD__ . ': not supported' );
1984         }
1985
1986         public function splitExt() {
1987                 throw new MWException( __METHOD__ . ': not supported' );
1988         }
1989
1990         public function splitHeading() {
1991                 throw new MWException( __METHOD__ . ': not supported' );
1992         }
1993 }
1994
1995 /**
1996  * @ingroup Parser
1997  * @codingStandardsIgnoreStart
1998  */
1999 class PPNode_Hash_Array implements PPNode {
2000         // @codingStandardsIgnoreEnd
2001
2002         public $value, $nextSibling;
2003
2004         public function __construct( $value ) {
2005                 $this->value = $value;
2006         }
2007
2008         public function __toString() {
2009                 return var_export( $this, true );
2010         }
2011
2012         public function getLength() {
2013                 return count( $this->value );
2014         }
2015
2016         public function item( $i ) {
2017                 return $this->value[$i];
2018         }
2019
2020         public function getName() {
2021                 return '#nodelist';
2022         }
2023
2024         public function getNextSibling() {
2025                 return $this->nextSibling;
2026         }
2027
2028         public function getChildren() {
2029                 return false;
2030         }
2031
2032         public function getFirstChild() {
2033                 return false;
2034         }
2035
2036         public function getChildrenOfType( $name ) {
2037                 return false;
2038         }
2039
2040         public function splitArg() {
2041                 throw new MWException( __METHOD__ . ': not supported' );
2042         }
2043
2044         public function splitExt() {
2045                 throw new MWException( __METHOD__ . ': not supported' );
2046         }
2047
2048         public function splitHeading() {
2049                 throw new MWException( __METHOD__ . ': not supported' );
2050         }
2051 }
2052
2053 /**
2054  * @ingroup Parser
2055  * @codingStandardsIgnoreStart
2056  */
2057 class PPNode_Hash_Attr implements PPNode {
2058         // @codingStandardsIgnoreEnd
2059
2060         public $name, $value, $nextSibling;
2061
2062         public function __construct( $name, $value ) {
2063                 $this->name = $name;
2064                 $this->value = $value;
2065         }
2066
2067         public function __toString() {
2068                 return "<@{$this->name}>" . htmlspecialchars( $this->value ) . "</@{$this->name}>";
2069         }
2070
2071         public function getName() {
2072                 return $this->name;
2073         }
2074
2075         public function getNextSibling() {
2076                 return $this->nextSibling;
2077         }
2078
2079         public function getChildren() {
2080                 return false;
2081         }
2082
2083         public function getFirstChild() {
2084                 return false;
2085         }
2086
2087         public function getChildrenOfType( $name ) {
2088                 return false;
2089         }
2090
2091         public function getLength() {
2092                 return false;
2093         }
2094
2095         public function item( $i ) {
2096                 return false;
2097         }
2098
2099         public function splitArg() {
2100                 throw new MWException( __METHOD__ . ': not supported' );
2101         }
2102
2103         public function splitExt() {
2104                 throw new MWException( __METHOD__ . ': not supported' );
2105         }
2106
2107         public function splitHeading() {
2108                 throw new MWException( __METHOD__ . ': not supported' );
2109         }
2110 }