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<?php
/**
* A preprocessor optimised for HipHop, using HipHop-specific syntax.
* vim: ft=php
*
* @file
* @ingroup Parser
*/
/**
* @ingroup Parser
*/
class Preprocessor_HipHop implements Preprocessor {
/**
* @var Parser
*/
var $parser;
const CACHE_VERSION = 1;
function __construct( $parser ) {
$this->parser = $parser;
}
/**
* @return PPFrame_HipHop
*/
function newFrame() {
return new PPFrame_HipHop( $this );
}
/**
* @param $args
* @return PPCustomFrame_HipHop
*/
function newCustomFrame( array $args ) {
return new PPCustomFrame_HipHop( $this, $args );
}
/**
* @param $values array
* @return PPNode_HipHop_Array
*/
function newPartNodeArray( $values ) {
$list = array();
foreach ( $values as $k => $val ) {
$partNode = new PPNode_HipHop_Tree( 'part' );
$nameNode = new PPNode_HipHop_Tree( 'name' );
if ( is_int( $k ) ) {
$nameNode->addChild( new PPNode_HipHop_Attr( 'index', $k ) );
$partNode->addChild( $nameNode );
} else {
$nameNode->addChild( new PPNode_HipHop_Text( $k ) );
$partNode->addChild( $nameNode );
$partNode->addChild( new PPNode_HipHop_Text( '=' ) );
}
$valueNode = new PPNode_HipHop_Tree( 'value' );
$valueNode->addChild( new PPNode_HipHop_Text( $val ) );
$partNode->addChild( $valueNode );
$list[] = $partNode;
}
$node = new PPNode_HipHop_Array( $list );
return $node;
}
/**
* Preprocess some wikitext and return the document tree.
* This is the ghost of Parser::replace_variables().
*
* @param $text String: the text to parse
* @param $flags Integer: bitwise combination of:
* Parser::PTD_FOR_INCLUSION Handle <noinclude>/<includeonly> as if the text is being
* included. Default is to assume a direct page view.
*
* The generated DOM tree must depend only on the input text and the flags.
* The DOM tree must be the same in OT_HTML and OT_WIKI mode, to avoid a regression of bug 4899.
*
* Any flag added to the $flags parameter here, or any other parameter liable to cause a
* change in the DOM tree for a given text, must be passed through the section identifier
* in the section edit link and thus back to extractSections().
*
* The output of this function is currently only cached in process memory, but a persistent
* cache may be implemented at a later date which takes further advantage of these strict
* dependency requirements.
*
* @return PPNode_HipHop_Tree
*/
function preprocessToObj( string $text, int $flags = 0 ) {
wfProfileIn( __METHOD__ );
// Check cache.
global $wgMemc, $wgPreprocessorCacheThreshold;
$cacheable = ($wgPreprocessorCacheThreshold !== false && strlen( $text ) > $wgPreprocessorCacheThreshold);
if ( $cacheable ) {
wfProfileIn( __METHOD__.'-cacheable' );
$cacheKey = strval( wfMemcKey( 'preprocess-hash', md5($text), $flags ) );
$cacheValue = strval( $wgMemc->get( $cacheKey ) );
if ( $cacheValue !== '' ) {
$version = substr( $cacheValue, 0, 8 );
if ( intval( $version ) == self::CACHE_VERSION ) {
$hash = unserialize( substr( $cacheValue, 8 ) );
// From the cache
wfDebugLog( "Preprocessor",
"Loaded preprocessor hash from memcached (key $cacheKey)" );
wfProfileOut( __METHOD__.'-cacheable' );
wfProfileOut( __METHOD__ );
return $hash;
}
}
wfProfileIn( __METHOD__.'-cache-miss' );
}
$rules = array(
'{' => array(
'end' => '}',
'names' => array(
2 => 'template',
3 => 'tplarg',
),
'min' => 2,
'max' => 3,
),
'[' => array(
'end' => ']',
'names' => array( 2 => 'LITERAL' ),
'min' => 2,
'max' => 2,
)
);
$forInclusion = (bool)( $flags & Parser::PTD_FOR_INCLUSION );
$xmlishElements = (array)$this->parser->getStripList();
$enableOnlyinclude = false;
if ( $forInclusion ) {
$ignoredTags = array( 'includeonly', '/includeonly' );
$ignoredElements = array( 'noinclude' );
$xmlishElements[] = 'noinclude';
if ( strpos( $text, '<onlyinclude>' ) !== false && strpos( $text, '</onlyinclude>' ) !== false ) {
$enableOnlyinclude = true;
}
} else if ( $this->parser->ot['wiki'] ) {
$ignoredTags = array( 'noinclude', '/noinclude', 'onlyinclude', '/onlyinclude', 'includeonly', '/includeonly' );
$ignoredElements = array();
} else {
$ignoredTags = array( 'noinclude', '/noinclude', 'onlyinclude', '/onlyinclude' );
$ignoredElements = array( 'includeonly' );
$xmlishElements[] = 'includeonly';
}
$xmlishRegex = implode( '|', array_merge( $xmlishElements, $ignoredTags ) );
// Use "A" modifier (anchored) instead of "^", because ^ doesn't work with an offset
$elementsRegex = "~($xmlishRegex)(?:\s|\/>|>)|(!--)~iA";
$stack = new PPDStack_HipHop;
$searchBase = "[{<\n";
$revText = strrev( $text ); // For fast reverse searches
$i = 0; # Input pointer, starts out pointing to a pseudo-newline before the start
$accum = $stack->getAccum(); # Current accumulator
$headingIndex = 1;
$stackFlags = array(
'findPipe' => false, # True to take notice of pipe characters
'findEquals' => false, # True to find equals signs in arguments
'inHeading' => false, # True if $i is inside a possible heading
);
$noMoreGT = false; # True if there are no more greater-than (>) signs right of $i
$findOnlyinclude = $enableOnlyinclude; # True to ignore all input up to the next <onlyinclude>
$fakeLineStart = true; # Do a line-start run without outputting an LF character
while ( true ) {
//$this->memCheck();
if ( $findOnlyinclude ) {
// Ignore all input up to the next <onlyinclude>
$variantStartPos = strpos( $text, '<onlyinclude>', $i );
if ( $variantStartPos === false ) {
// Ignored section runs to the end
$accum->addNodeWithText( 'ignore', strval( substr( $text, $i ) ) );
break;
}
$startPos1 = intval( $variantStartPos );
$tagEndPos = $startPos1 + strlen( '<onlyinclude>' ); // past-the-end
$accum->addNodeWithText( 'ignore', strval( substr( $text, $i, $tagEndPos - $i ) ) );
$i = $tagEndPos;
$findOnlyinclude = false;
}
if ( $fakeLineStart ) {
$found = 'line-start';
$curChar = '';
} else {
# Find next opening brace, closing brace or pipe
$search = $searchBase;
if ( $stack->top === false ) {
$currentClosing = '';
} else {
$currentClosing = strval( $stack->getTop()->close );
$search .= $currentClosing;
}
if ( $stackFlags['findPipe'] ) {
$search .= '|';
}
if ( $stackFlags['findEquals'] ) {
// First equals will be for the template
$search .= '=';
}
$rule = null;
# Output literal section, advance input counter
$literalLength = intval( strcspn( $text, $search, $i ) );
if ( $literalLength > 0 ) {
$accum->addLiteral( strval( substr( $text, $i, $literalLength ) ) );
$i += $literalLength;
}
if ( $i >= strlen( $text ) ) {
if ( $currentClosing === "\n" ) {
// Do a past-the-end run to finish off the heading
$curChar = '';
$found = 'line-end';
} else {
# All done
break;
}
} else {
$curChar = $text[$i];
if ( $curChar === '|' ) {
$found = 'pipe';
} elseif ( $curChar === '=' ) {
$found = 'equals';
} elseif ( $curChar === '<' ) {
$found = 'angle';
} elseif ( $curChar === "\n" ) {
if ( $stackFlags['inHeading'] ) {
$found = 'line-end';
} else {
$found = 'line-start';
}
} elseif ( $curChar === $currentClosing ) {
$found = 'close';
} elseif ( isset( $rules[$curChar] ) ) {
$found = 'open';
$rule = $rules[$curChar];
} else {
# Some versions of PHP have a strcspn which stops on null characters
# Ignore and continue
++$i;
continue;
}
}
}
if ( $found === 'angle' ) {
$matches = false;
// Handle </onlyinclude>
if ( $enableOnlyinclude
&& substr( $text, $i, strlen( '</onlyinclude>' ) ) === '</onlyinclude>' )
{
$findOnlyinclude = true;
continue;
}
// Determine element name
if ( !preg_match( $elementsRegex, $text, $matches, 0, $i + 1 ) ) {
// Element name missing or not listed
$accum->addLiteral( '<' );
++$i;
continue;
}
// Handle comments
if ( isset( $matches[2] ) && $matches[2] === '!--' ) {
// To avoid leaving blank lines, when a comment is both preceded
// and followed by a newline (ignoring spaces), trim leading and
// trailing spaces and one of the newlines.
// Find the end
$variantEndPos = strpos( $text, '-->', $i + 4 );
if ( $variantEndPos === false ) {
// Unclosed comment in input, runs to end
$inner = strval( substr( $text, $i ) );
$accum->addNodeWithText( 'comment', $inner );
$i = strlen( $text );
} else {
$endPos = intval( $variantEndPos );
// Search backwards for leading whitespace
if ( $i ) {
$wsStart = $i - intval( strspn( $revText, ' ', strlen( $text ) - $i ) );
} else {
$wsStart = 0;
}
// Search forwards for trailing whitespace
// $wsEnd will be the position of the last space (or the '>' if there's none)
$wsEnd = $endPos + 2 + intval( strspn( $text, ' ', $endPos + 3 ) );
// Eat the line if possible
// TODO: This could theoretically be done if $wsStart == 0, i.e. for comments at
// the overall start. That's not how Sanitizer::removeHTMLcomments() did it, but
// it's a possible beneficial b/c break.
if ( $wsStart > 0 && substr( $text, $wsStart - 1, 1 ) === "\n"
&& substr( $text, $wsEnd + 1, 1 ) === "\n" )
{
$startPos2 = $wsStart;
$endPos = $wsEnd + 1;
// Remove leading whitespace from the end of the accumulator
// Sanity check first though
$wsLength = $i - $wsStart;
if ( $wsLength > 0
&& $accum->lastNode instanceof PPNode_HipHop_Text
&& substr( $accum->lastNode->value, -$wsLength ) === str_repeat( ' ', $wsLength ) )
{
$accum->lastNode->value = strval( substr( $accum->lastNode->value, 0, -$wsLength ) );
}
// Do a line-start run next time to look for headings after the comment
$fakeLineStart = true;
} else {
// No line to eat, just take the comment itself
$startPos2 = $i;
$endPos += 2;
}
if ( $stack->top ) {
$part = $stack->getTop()->getCurrentPart();
if ( ! (isset( $part->commentEnd ) && $part->commentEnd == $wsStart - 1 )) {
$part->visualEnd = $wsStart;
}
// Else comments abutting, no change in visual end
$part->commentEnd = $endPos;
}
$i = $endPos + 1;
$inner = strval( substr( $text, $startPos2, $endPos - $startPos2 + 1 ) );
$accum->addNodeWithText( 'comment', $inner );
}
continue;
}
$name = strval( $matches[1] );
$lowerName = strtolower( $name );
$attrStart = $i + strlen( $name ) + 1;
// Find end of tag
$variantTagEndPos = $noMoreGT ? false : strpos( $text, '>', $attrStart );
if ( $variantTagEndPos === false ) {
// Infinite backtrack
// Disable tag search to prevent worst-case O(N^2) performance
$noMoreGT = true;
$accum->addLiteral( '<' );
++$i;
continue;
}
$tagEndPos = intval( $variantTagEndPos );
// Handle ignored tags
if ( in_array( $lowerName, $ignoredTags ) ) {
$accum->addNodeWithText( 'ignore', strval( substr( $text, $i, $tagEndPos - $i + 1 ) ) );
$i = $tagEndPos + 1;
continue;
}
$tagStartPos = $i;
$close = '';
if ( $text[$tagEndPos-1] === '/' ) {
// Short end tag
$attrEnd = $tagEndPos - 1;
$shortEnd = true;
$inner = '';
$i = $tagEndPos + 1;
$haveClose = false;
} else {
$attrEnd = $tagEndPos;
$shortEnd = false;
// Find closing tag
if ( preg_match( "/<\/" . preg_quote( $name, '/' ) . "\s*>/i",
$text, $matches, PREG_OFFSET_CAPTURE, $tagEndPos + 1 ) )
{
$inner = strval( substr( $text, $tagEndPos + 1, $matches[0][1] - $tagEndPos - 1 ) );
$i = intval( $matches[0][1] ) + strlen( $matches[0][0] );
$close = strval( $matches[0][0] );
$haveClose = true;
} else {
// No end tag -- let it run out to the end of the text.
$inner = strval( substr( $text, $tagEndPos + 1 ) );
$i = strlen( $text );
$haveClose = false;
}
}
// <includeonly> and <noinclude> just become <ignore> tags
if ( in_array( $lowerName, $ignoredElements ) ) {
$accum->addNodeWithText( 'ignore', strval( substr( $text, $tagStartPos, $i - $tagStartPos ) ) );
continue;
}
if ( $attrEnd <= $attrStart ) {
$attr = '';
} else {
// Note that the attr element contains the whitespace between name and attribute,
// this is necessary for precise reconstruction during pre-save transform.
$attr = strval( substr( $text, $attrStart, $attrEnd - $attrStart ) );
}
$extNode = new PPNode_HipHop_Tree( 'ext' );
$extNode->addChild( PPNode_HipHop_Tree::newWithText( 'name', $name ) );
$extNode->addChild( PPNode_HipHop_Tree::newWithText( 'attr', $attr ) );
if ( !$shortEnd ) {
$extNode->addChild( PPNode_HipHop_Tree::newWithText( 'inner', $inner ) );
}
if ( $haveClose ) {
$extNode->addChild( PPNode_HipHop_Tree::newWithText( 'close', $close ) );
}
$accum->addNode( $extNode );
}
elseif ( $found === 'line-start' ) {
// Is this the start of a heading?
// Line break belongs before the heading element in any case
if ( $fakeLineStart ) {
$fakeLineStart = false;
} else {
$accum->addLiteral( $curChar );
$i++;
}
$count = intval( strspn( $text, '=', $i, 6 ) );
if ( $count == 1 && $stackFlags['findEquals'] ) {
// DWIM: This looks kind of like a name/value separator
// Let's let the equals handler have it and break the potential heading
// This is heuristic, but AFAICT the methods for completely correct disambiguation are very complex.
} elseif ( $count > 0 ) {
$partData = array(
'open' => "\n",
'close' => "\n",
'parts' => array( new PPDPart_HipHop( str_repeat( '=', $count ) ) ),
'startPos' => $i,
'count' => $count );
$stack->push( $partData );
$accum = $stack->getAccum();
$stackFlags = $stack->getFlags();
$i += $count;
}
} elseif ( $found === 'line-end' ) {
$piece = $stack->getTop();
// A heading must be open, otherwise \n wouldn't have been in the search list
assert( $piece->open === "\n" );
$part = $piece->getCurrentPart();
// Search back through the input to see if it has a proper close
// Do this using the reversed string since the other solutions (end anchor, etc.) are inefficient
$wsLength = intval( strspn( $revText, " \t", strlen( $text ) - $i ) );
$searchStart = $i - $wsLength;
if ( isset( $part->commentEnd ) && $searchStart - 1 == $part->commentEnd ) {
// Comment found at line end
// Search for equals signs before the comment
$searchStart = intval( $part->visualEnd );
$searchStart -= intval( strspn( $revText, " \t", strlen( $text ) - $searchStart ) );
}
$count = intval( $piece->count );
$equalsLength = intval( strspn( $revText, '=', strlen( $text ) - $searchStart ) );
$isTreeNode = false;
$resultAccum = $accum;
if ( $equalsLength > 0 ) {
if ( $searchStart - $equalsLength == $piece->startPos ) {
// This is just a single string of equals signs on its own line
// Replicate the doHeadings behaviour /={count}(.+)={count}/
// First find out how many equals signs there really are (don't stop at 6)
$count = $equalsLength;
if ( $count < 3 ) {
$count = 0;
} else {
$count = intval( ( $count - 1 ) / 2 );
if ( $count > 6 ) {
$count = 6;
}
}
} else {
if ( $count > $equalsLength ) {
$count = $equalsLength;
}
}
if ( $count > 0 ) {
// Normal match, output <h>
$tree = new PPNode_HipHop_Tree( 'possible-h' );
$tree->addChild( new PPNode_HipHop_Attr( 'level', $count ) );
$tree->addChild( new PPNode_HipHop_Attr( 'i', $headingIndex++ ) );
$tree->lastChild->nextSibling = $accum->firstNode;
$tree->lastChild = $accum->lastNode;
$isTreeNode = true;
} else {
// Single equals sign on its own line, count=0
// Output $resultAccum
}
} else {
// No match, no <h>, just pass down the inner text
// Output $resultAccum
}
// Unwind the stack
$stack->pop();
$accum = $stack->getAccum();
$stackFlags = $stack->getFlags();
// Append the result to the enclosing accumulator
if ( $isTreeNode ) {
$accum->addNode( $tree );
} else {
$accum->addAccum( $resultAccum );
}
// Note that we do NOT increment the input pointer.
// This is because the closing linebreak could be the opening linebreak of
// another heading. Infinite loops are avoided because the next iteration MUST
// hit the heading open case above, which unconditionally increments the
// input pointer.
} elseif ( $found === 'open' ) {
# count opening brace characters
$count = intval( strspn( $text, $curChar, $i ) );
# we need to add to stack only if opening brace count is enough for one of the rules
if ( $count >= $rule['min'] ) {
# Add it to the stack
$partData = array(
'open' => $curChar,
'close' => $rule['end'],
'count' => $count,
'lineStart' => ($i == 0 || $text[$i-1] === "\n"),
);
$stack->push( $partData );
$accum = $stack->getAccum();
$stackFlags = $stack->getFlags();
} else {
# Add literal brace(s)
$accum->addLiteral( str_repeat( $curChar, $count ) );
}
$i += $count;
} elseif ( $found === 'close' ) {
$piece = $stack->getTop();
# lets check if there are enough characters for closing brace
$maxCount = intval( $piece->count );
$count = intval( strspn( $text, $curChar, $i, $maxCount ) );
# check for maximum matching characters (if there are 5 closing
# characters, we will probably need only 3 - depending on the rules)
$rule = $rules[$piece->open];
if ( $count > $rule['max'] ) {
# The specified maximum exists in the callback array, unless the caller
# has made an error
$matchingCount = intval( $rule['max'] );
} else {
# Count is less than the maximum
# Skip any gaps in the callback array to find the true largest match
# Need to use array_key_exists not isset because the callback can be null
$matchingCount = $count;
while ( $matchingCount > 0 && !array_key_exists( $matchingCount, $rule['names'] ) ) {
--$matchingCount;
}
}
if ($matchingCount <= 0) {
# No matching element found in callback array
# Output a literal closing brace and continue
$accum->addLiteral( str_repeat( $curChar, $count ) );
$i += $count;
continue;
}
$name = strval( $rule['names'][$matchingCount] );
$isTreeNode = false;
if ( $name === 'LITERAL' ) {
// No element, just literal text
$resultAccum = $piece->breakSyntax( $matchingCount );
$resultAccum->addLiteral( str_repeat( $rule['end'], $matchingCount ) );
} else {
# Create XML element
# Note: $parts is already XML, does not need to be encoded further
$isTreeNode = true;
$parts = $piece->parts;
$titleAccum = PPDAccum_HipHop::cast( $parts[0]->out );
unset( $parts[0] );
$tree = new PPNode_HipHop_Tree( $name );
# The invocation is at the start of the line if lineStart is set in
# the stack, and all opening brackets are used up.
if ( $maxCount == $matchingCount && !empty( $piece->lineStart ) ) {
$tree->addChild( new PPNode_HipHop_Attr( 'lineStart', 1 ) );
}
$titleNode = new PPNode_HipHop_Tree( 'title' );
$titleNode->firstChild = $titleAccum->firstNode;
$titleNode->lastChild = $titleAccum->lastNode;
$tree->addChild( $titleNode );
$argIndex = 1;
foreach ( $parts as $variantPart ) {
$part = PPDPart_HipHop::cast( $variantPart );
if ( isset( $part->eqpos ) ) {
// Find equals
$lastNode = false;
for ( $node = $part->out->firstNode; $node; $node = $node->nextSibling ) {
if ( $node === $part->eqpos ) {
break;
}
$lastNode = $node;
}
if ( !$node ) {
throw new MWException( __METHOD__. ': eqpos not found' );
}
if ( $node->name !== 'equals' ) {
throw new MWException( __METHOD__ .': eqpos is not equals' );
}
$equalsNode = $node;
// Construct name node
$nameNode = new PPNode_HipHop_Tree( 'name' );
if ( $lastNode !== false ) {
$lastNode->nextSibling = false;
$nameNode->firstChild = $part->out->firstNode;
$nameNode->lastChild = $lastNode;
}
// Construct value node
$valueNode = new PPNode_HipHop_Tree( 'value' );
if ( $equalsNode->nextSibling !== false ) {
$valueNode->firstChild = $equalsNode->nextSibling;
$valueNode->lastChild = $part->out->lastNode;
}
$partNode = new PPNode_HipHop_Tree( 'part' );
$partNode->addChild( $nameNode );
$partNode->addChild( $equalsNode->firstChild );
$partNode->addChild( $valueNode );
$tree->addChild( $partNode );
} else {
$partNode = new PPNode_HipHop_Tree( 'part' );
$nameNode = new PPNode_HipHop_Tree( 'name' );
$nameNode->addChild( new PPNode_HipHop_Attr( 'index', $argIndex++ ) );
$valueNode = new PPNode_HipHop_Tree( 'value' );
$valueNode->firstChild = $part->out->firstNode;
$valueNode->lastChild = $part->out->lastNode;
$partNode->addChild( $nameNode );
$partNode->addChild( $valueNode );
$tree->addChild( $partNode );
}
}
}
# Advance input pointer
$i += $matchingCount;
# Unwind the stack
$stack->pop();
$accum = $stack->getAccum();
# Re-add the old stack element if it still has unmatched opening characters remaining
if ($matchingCount < $piece->count) {
$piece->parts = array( new PPDPart_HipHop );
$piece->count -= $matchingCount;
# do we still qualify for any callback with remaining count?
$names = $rules[$piece->open]['names'];
$skippedBraces = 0;
$enclosingAccum = $accum;
while ( $piece->count ) {
if ( array_key_exists( $piece->count, $names ) ) {
$stack->push( $piece );
$accum = $stack->getAccum();
break;
}
--$piece->count;
$skippedBraces ++;
}
$enclosingAccum->addLiteral( str_repeat( $piece->open, $skippedBraces ) );
}
$stackFlags = $stack->getFlags();
# Add XML element to the enclosing accumulator
if ( $isTreeNode ) {
$accum->addNode( $tree );
} else {
$accum->addAccum( $resultAccum );
}
} elseif ( $found === 'pipe' ) {
$stackFlags['findEquals'] = true; // shortcut for getFlags()
$stack->addPart();
$accum = $stack->getAccum();
++$i;
} elseif ( $found === 'equals' ) {
$stackFlags['findEquals'] = false; // shortcut for getFlags()
$accum->addNodeWithText( 'equals', '=' );
$stack->getCurrentPart()->eqpos = $accum->lastNode;
++$i;
}
}
# Output any remaining unclosed brackets
foreach ( $stack->stack as $variantPiece ) {
$piece = PPDStackElement_HipHop::cast( $variantPiece );
$stack->rootAccum->addAccum( $piece->breakSyntax() );
}
# Enable top-level headings
for ( $node = $stack->rootAccum->firstNode; $node; $node = $node->nextSibling ) {
if ( isset( $node->name ) && $node->name === 'possible-h' ) {
$node->name = 'h';
}
}
$rootNode = new PPNode_HipHop_Tree( 'root' );
$rootNode->firstChild = $stack->rootAccum->firstNode;
$rootNode->lastChild = $stack->rootAccum->lastNode;
// Cache
if ($cacheable) {
$cacheValue = sprintf( "%08d", self::CACHE_VERSION ) . serialize( $rootNode );
$wgMemc->set( $cacheKey, $cacheValue, 86400 );
wfProfileOut( __METHOD__.'-cache-miss' );
wfProfileOut( __METHOD__.'-cacheable' );
wfDebugLog( "Preprocessor", "Saved preprocessor Hash to memcached (key $cacheKey)" );
}
wfProfileOut( __METHOD__ );
return $rootNode;
}
}
/**
* Stack class to help Preprocessor::preprocessToObj()
* @ingroup Parser
*/
class PPDStack_HipHop {
var $stack, $rootAccum;
/**
* @var PPDStack
*/
var $top;
var $out;
static $false = false;
function __construct() {
$this->stack = array();
$this->top = false;
$this->rootAccum = new PPDAccum_HipHop;
$this->accum = $this->rootAccum;
}
/**
* @return int
*/
function count() {
return count( $this->stack );
}
function getAccum() {
return PPDAccum_HipHop::cast( $this->accum );
}
function getCurrentPart() {
return $this->getTop()->getCurrentPart();
}
function getTop() {
return PPDStackElement_HipHop::cast( $this->top );
}
function push( $data ) {
if ( $data instanceof PPDStackElement_HipHop ) {
$this->stack[] = $data;
} else {
$this->stack[] = new PPDStackElement_HipHop( $data );
}
$this->top = $this->stack[ count( $this->stack ) - 1 ];
$this->accum = $this->top->getAccum();
}
function pop() {
if ( !count( $this->stack ) ) {
throw new MWException( __METHOD__.': no elements remaining' );
}
$temp = array_pop( $this->stack );
if ( count( $this->stack ) ) {
$this->top = $this->stack[ count( $this->stack ) - 1 ];
$this->accum = $this->top->getAccum();
} else {
$this->top = self::$false;
$this->accum = $this->rootAccum;
}
return $temp;
}
function addPart( $s = '' ) {
$this->top->addPart( $s );
$this->accum = $this->top->getAccum();
}
/**
* @return array
*/
function getFlags() {
if ( !count( $this->stack ) ) {
return array(
'findEquals' => false,
'findPipe' => false,
'inHeading' => false,
);
} else {
return $this->top->getFlags();
}
}
}
/**
* @ingroup Parser
*/
class PPDStackElement_HipHop {
var $open, // Opening character (\n for heading)
$close, // Matching closing character
$count, // Number of opening characters found (number of "=" for heading)
$parts, // Array of PPDPart objects describing pipe-separated parts.
$lineStart; // True if the open char appeared at the start of the input line. Not set for headings.
static function cast( PPDStackElement_HipHop $obj ) {
return $obj;
}
function __construct( $data = array() ) {
$this->parts = array( new PPDPart_HipHop );
foreach ( $data as $name => $value ) {
$this->$name = $value;
}
}
function getAccum() {
return PPDAccum_HipHop::cast( $this->parts[count($this->parts) - 1]->out );
}
function addPart( $s = '' ) {
$this->parts[] = new PPDPart_HipHop( $s );
}
function getCurrentPart() {
return PPDPart_HipHop::cast( $this->parts[count($this->parts) - 1] );
}
/**
* @return array
*/
function getFlags() {
$partCount = count( $this->parts );
$findPipe = $this->open !== "\n" && $this->open !== '[';
return array(
'findPipe' => $findPipe,
'findEquals' => $findPipe && $partCount > 1 && !isset( $this->parts[$partCount - 1]->eqpos ),
'inHeading' => $this->open === "\n",
);
}
/**
* Get the accumulator that would result if the close is not found.
*
* @return PPDAccum_HipHop
*/
function breakSyntax( $openingCount = false ) {
if ( $this->open === "\n" ) {
$accum = PPDAccum_HipHop::cast( $this->parts[0]->out );
} else {
if ( $openingCount === false ) {
$openingCount = $this->count;
}
$accum = new PPDAccum_HipHop;
$accum->addLiteral( str_repeat( $this->open, $openingCount ) );
$first = true;
foreach ( $this->parts as $part ) {
if ( $first ) {
$first = false;
} else {
$accum->addLiteral( '|' );
}
$accum->addAccum( $part->out );
}
}
return $accum;
}
}
/**
* @ingroup Parser
*/
class PPDPart_HipHop {
var $out; // Output accumulator object
// Optional member variables:
// eqpos Position of equals sign in output accumulator
// commentEnd Past-the-end input pointer for the last comment encountered
// visualEnd Past-the-end input pointer for the end of the accumulator minus comments
function __construct( $out = '' ) {
$this->out = new PPDAccum_HipHop;
if ( $out !== '' ) {
$this->out->addLiteral( $out );
}
}
static function cast( PPDPart_HipHop $obj ) {
return $obj;
}
}
/**
* @ingroup Parser
*/
class PPDAccum_HipHop {
var $firstNode, $lastNode;
function __construct() {
$this->firstNode = $this->lastNode = false;
}
static function cast( PPDAccum_HipHop $obj ) {
return $obj;
}
/**
* Append a string literal
*/
function addLiteral( string $s ) {
if ( $this->lastNode === false ) {
$this->firstNode = $this->lastNode = new PPNode_HipHop_Text( $s );
} elseif ( $this->lastNode instanceof PPNode_HipHop_Text ) {
$this->lastNode->value .= $s;
} else {
$this->lastNode->nextSibling = new PPNode_HipHop_Text( $s );
$this->lastNode = $this->lastNode->nextSibling;
}
}
/**
* Append a PPNode
*/
function addNode( PPNode $node ) {
if ( $this->lastNode === false ) {
$this->firstNode = $this->lastNode = $node;
} else {
$this->lastNode->nextSibling = $node;
$this->lastNode = $node;
}
}
/**
* Append a tree node with text contents
*/
function addNodeWithText( string $name, string $value ) {
$node = PPNode_HipHop_Tree::newWithText( $name, $value );
$this->addNode( $node );
}
/**
* Append a PPDAccum_HipHop
* Takes over ownership of the nodes in the source argument. These nodes may
* subsequently be modified, especially nextSibling.
*/
function addAccum( PPDAccum_HipHop $accum ) {
if ( $accum->lastNode === false ) {
// nothing to add
} elseif ( $this->lastNode === false ) {
$this->firstNode = $accum->firstNode;
$this->lastNode = $accum->lastNode;
} else {
$this->lastNode->nextSibling = $accum->firstNode;
$this->lastNode = $accum->lastNode;
}
}
}
/**
* An expansion frame, used as a context to expand the result of preprocessToObj()
* @ingroup Parser
*/
class PPFrame_HipHop implements PPFrame {
/**
* @var Parser
*/
var $parser;
/**
* @var Preprocessor
*/
var $preprocessor;
/**
* @var Title
*/
var $title;
var $titleCache;
/**
* Hashtable listing templates which are disallowed for expansion in this frame,
* having been encountered previously in parent frames.
*/
var $loopCheckHash;
/**
* Recursion depth of this frame, top = 0
* Note that this is NOT the same as expansion depth in expand()
*/
var $depth;
/**
* Construct a new preprocessor frame.
* @param $preprocessor Preprocessor: the parent preprocessor
*/
function __construct( $preprocessor ) {
$this->preprocessor = $preprocessor;
$this->parser = $preprocessor->parser;
$this->title = $this->parser->mTitle;
$this->titleCache = array( $this->title ? $this->title->getPrefixedDBkey() : false );
$this->loopCheckHash = array();
$this->depth = 0;
}
/**
* Create a new child frame
* $args is optionally a multi-root PPNode or array containing the template arguments
*
* @param $args PPNode_HipHop_Array|array
* @param $title Title|false
*
* @return PPTemplateFrame_HipHop
*/
function newChild( $args = false, $title = false ) {
$namedArgs = array();
$numberedArgs = array();
if ( $title === false ) {
$title = $this->title;
}
if ( $args !== false ) {
if ( $args instanceof PPNode_HipHop_Array ) {
$args = $args->value;
} elseif ( !is_array( $args ) ) {
throw new MWException( __METHOD__ . ': $args must be array or PPNode_HipHop_Array' );
}
foreach ( $args as $arg ) {
$bits = $arg->splitArg();
if ( $bits['index'] !== '' ) {
// Numbered parameter
$numberedArgs[$bits['index']] = $bits['value'];
unset( $namedArgs[$bits['index']] );
} else {
// Named parameter
$name = trim( $this->expand( $bits['name'], PPFrame::STRIP_COMMENTS ) );
$namedArgs[$name] = $bits['value'];
unset( $numberedArgs[$name] );
}
}
}
return new PPTemplateFrame_HipHop( $this->preprocessor, $this, $numberedArgs, $namedArgs, $title );
}
/**
* @throws MWException
* @param $root
* @param $flags int
* @return string
*/
function expand( $root, $flags = 0 ) {
static $expansionDepth = 0;
if ( is_string( $root ) ) {
return $root;
}
if ( ++$this->parser->mPPNodeCount > $this->parser->mOptions->getMaxPPNodeCount() ) {
return '<span class="error">Node-count limit exceeded</span>';
}
if ( $expansionDepth > $this->parser->mOptions->getMaxPPExpandDepth() ) {
return '<span class="error">Expansion depth limit exceeded</span>';
}
++$expansionDepth;
$outStack = array( '', '' );
$iteratorStack = array( false, $root );
$indexStack = array( 0, 0 );
while ( count( $iteratorStack ) > 1 ) {
$level = count( $outStack ) - 1;
$iteratorNode =& $iteratorStack[ $level ];
$out =& $outStack[$level];
$index =& $indexStack[$level];
if ( is_array( $iteratorNode ) ) {
if ( $index >= count( $iteratorNode ) ) {
// All done with this iterator
$iteratorStack[$level] = false;
$contextNode = false;
} else {
$contextNode = $iteratorNode[$index];
$index++;
}
} elseif ( $iteratorNode instanceof PPNode_HipHop_Array ) {
if ( $index >= $iteratorNode->getLength() ) {
// All done with this iterator
$iteratorStack[$level] = false;
$contextNode = false;
} else {
$contextNode = $iteratorNode->item( $index );
$index++;
}
} else {
// Copy to $contextNode and then delete from iterator stack,
// because this is not an iterator but we do have to execute it once
$contextNode = $iteratorStack[$level];
$iteratorStack[$level] = false;
}
$newIterator = false;
if ( $contextNode === false ) {
// nothing to do
} elseif ( is_string( $contextNode ) ) {
$out .= $contextNode;
} elseif ( is_array( $contextNode ) || $contextNode instanceof PPNode_HipHop_Array ) {
$newIterator = $contextNode;
} elseif ( $contextNode instanceof PPNode_HipHop_Attr ) {
// No output
} elseif ( $contextNode instanceof PPNode_HipHop_Text ) {
$out .= $contextNode->value;
} elseif ( $contextNode instanceof PPNode_HipHop_Tree ) {
if ( $contextNode->name === 'template' ) {
# Double-brace expansion
$bits = $contextNode->splitTemplate();
if ( $flags & PPFrame::NO_TEMPLATES ) {
$newIterator = $this->virtualBracketedImplode( '{{', '|', '}}', $bits['title'], $bits['parts'] );
} else {
$ret = $this->parser->braceSubstitution( $bits, $this );
if ( isset( $ret['object'] ) ) {
$newIterator = $ret['object'];
} else {
$out .= $ret['text'];
}
}
} elseif ( $contextNode->name === 'tplarg' ) {
# Triple-brace expansion
$bits = $contextNode->splitTemplate();
if ( $flags & PPFrame::NO_ARGS ) {
$newIterator = $this->virtualBracketedImplode( '{{{', '|', '}}}', $bits['title'], $bits['parts'] );
} else {
$ret = $this->parser->argSubstitution( $bits, $this );
if ( isset( $ret['object'] ) ) {
$newIterator = $ret['object'];
} else {
$out .= $ret['text'];
}
}
} elseif ( $contextNode->name === 'comment' ) {
# HTML-style comment
# Remove it in HTML, pre+remove and STRIP_COMMENTS modes
if ( $this->parser->ot['html']
|| ( $this->parser->ot['pre'] && $this->parser->mOptions->getRemoveComments() )
|| ( $flags & PPFrame::STRIP_COMMENTS ) )
{
$out .= '';
}
# Add a strip marker in PST mode so that pstPass2() can run some old-fashioned regexes on the result
# Not in RECOVER_COMMENTS mode (extractSections) though
elseif ( $this->parser->ot['wiki'] && ! ( $flags & PPFrame::RECOVER_COMMENTS ) ) {
$out .= $this->parser->insertStripItem( $contextNode->firstChild->value );
}
# Recover the literal comment in RECOVER_COMMENTS and pre+no-remove
else {
$out .= $contextNode->firstChild->value;
}
} elseif ( $contextNode->name === 'ignore' ) {
# Output suppression used by <includeonly> etc.
# OT_WIKI will only respect <ignore> in substed templates.
# The other output types respect it unless NO_IGNORE is set.
# extractSections() sets NO_IGNORE and so never respects it.
if ( ( !isset( $this->parent ) && $this->parser->ot['wiki'] ) || ( $flags & PPFrame::NO_IGNORE ) ) {
$out .= $contextNode->firstChild->value;
} else {
//$out .= '';
}
} elseif ( $contextNode->name === 'ext' ) {
# Extension tag
$bits = $contextNode->splitExt() + array( 'attr' => null, 'inner' => null, 'close' => null );
$out .= $this->parser->extensionSubstitution( $bits, $this );
} elseif ( $contextNode->name === 'h' ) {
# Heading
if ( $this->parser->ot['html'] ) {
# Expand immediately and insert heading index marker
$s = '';
for ( $node = $contextNode->firstChild; $node; $node = $node->nextSibling ) {
$s .= $this->expand( $node, $flags );
}
$bits = $contextNode->splitHeading();
$titleText = $this->title->getPrefixedDBkey();
$this->parser->mHeadings[] = array( $titleText, $bits['i'] );
$serial = count( $this->parser->mHeadings ) - 1;
$marker = "{$this->parser->mUniqPrefix}-h-$serial-" . Parser::MARKER_SUFFIX;
$s = substr( $s, 0, $bits['level'] ) . $marker . substr( $s, $bits['level'] );
$this->parser->mStripState->addGeneral( $marker, '' );
$out .= $s;
} else {
# Expand in virtual stack
$newIterator = $contextNode->getChildren();
}
} else {
# Generic recursive expansion
$newIterator = $contextNode->getChildren();
}
} else {
throw new MWException( __METHOD__.': Invalid parameter type' );
}
if ( $newIterator !== false ) {
$outStack[] = '';
$iteratorStack[] = $newIterator;
$indexStack[] = 0;
} elseif ( $iteratorStack[$level] === false ) {
// Return accumulated value to parent
// With tail recursion
while ( $iteratorStack[$level] === false && $level > 0 ) {
$outStack[$level - 1] .= $out;
array_pop( $outStack );
array_pop( $iteratorStack );
array_pop( $indexStack );
$level--;
}
}
}
--$expansionDepth;
return $outStack[0];
}
/**
* @param $sep
* @param $flags
* @return string
*/
function implodeWithFlags( $sep, $flags /*, ... */ ) {
$args = array_slice( func_get_args(), 2 );
$first = true;
$s = '';
foreach ( $args as $root ) {
if ( $root instanceof PPNode_HipHop_Array ) {
$root = $root->value;
}
if ( !is_array( $root ) ) {
$root = array( $root );
}
foreach ( $root as $node ) {
if ( $first ) {
$first = false;
} else {
$s .= $sep;
}
$s .= $this->expand( $node, $flags );
}
}
return $s;
}
/**
* Implode with no flags specified
* This previously called implodeWithFlags but has now been inlined to reduce stack depth
* @return string
*/
function implode( $sep /*, ... */ ) {
$args = array_slice( func_get_args(), 1 );
$first = true;
$s = '';
foreach ( $args as $root ) {
if ( $root instanceof PPNode_HipHop_Array ) {
$root = $root->value;
}
if ( !is_array( $root ) ) {
$root = array( $root );
}
foreach ( $root as $node ) {
if ( $first ) {
$first = false;
} else {
$s .= $sep;
}
$s .= $this->expand( $node );
}
}
return $s;
}
/**
* Makes an object that, when expand()ed, will be the same as one obtained
* with implode()
*
* @return PPNode_HipHop_Array
*/
function virtualImplode( $sep /*, ... */ ) {
$args = array_slice( func_get_args(), 1 );
$out = array();
$first = true;
foreach ( $args as $root ) {
if ( $root instanceof PPNode_HipHop_Array ) {
$root = $root->value;
}
if ( !is_array( $root ) ) {
$root = array( $root );
}
foreach ( $root as $node ) {
if ( $first ) {
$first = false;
} else {
$out[] = $sep;
}
$out[] = $node;
}
}
return new PPNode_HipHop_Array( $out );
}
/**
* Virtual implode with brackets
*
* @return PPNode_HipHop_Array
*/
function virtualBracketedImplode( $start, $sep, $end /*, ... */ ) {
$args = array_slice( func_get_args(), 3 );
$out = array( $start );
$first = true;
foreach ( $args as $root ) {
if ( $root instanceof PPNode_HipHop_Array ) {
$root = $root->value;
}
if ( !is_array( $root ) ) {
$root = array( $root );
}
foreach ( $root as $node ) {
if ( $first ) {
$first = false;
} else {
$out[] = $sep;
}
$out[] = $node;
}
}
$out[] = $end;
return new PPNode_HipHop_Array( $out );
}
function __toString() {
return 'frame{}';
}
/**
* @param $level bool
* @return array|bool|String
*/
function getPDBK( $level = false ) {
if ( $level === false ) {
return $this->title->getPrefixedDBkey();
} else {
return isset( $this->titleCache[$level] ) ? $this->titleCache[$level] : false;
}
}
/**
* @return array
*/
function getArguments() {
return array();
}
/**
* @return array
*/
function getNumberedArguments() {
return array();
}
/**
* @return array
*/
function getNamedArguments() {
return array();
}
/**
* Returns true if there are no arguments in this frame
*
* @return bool
*/
function isEmpty() {
return true;
}
/**
* @param $name
* @return bool
*/
function getArgument( $name ) {
return false;
}
/**
* Returns true if the infinite loop check is OK, false if a loop is detected
*
* @param $title Title
*
* @return bool
*/
function loopCheck( $title ) {
return !isset( $this->loopCheckHash[$title->getPrefixedDBkey()] );
}
/**
* Return true if the frame is a template frame
*
* @return bool
*/
function isTemplate() {
return false;
}
/**
* Get a title of frame
*
* @return Title
*/
function getTitle() {
return $this->title;
}
}
/**
* Expansion frame with template arguments
* @ingroup Parser
*/
class PPTemplateFrame_HipHop extends PPFrame_HipHop {
var $numberedArgs, $namedArgs, $parent;
var $numberedExpansionCache, $namedExpansionCache;
/**
* @param $preprocessor
* @param $parent
* @param $numberedArgs array
* @param $namedArgs array
* @param $title Title
*/
function __construct( $preprocessor, $parent = false, $numberedArgs = array(), $namedArgs = array(), $title = false ) {
parent::__construct( $preprocessor );
$this->parent = $parent;
$this->numberedArgs = $numberedArgs;
$this->namedArgs = $namedArgs;
$this->title = $title;
$pdbk = $title ? $title->getPrefixedDBkey() : false;
$this->titleCache = $parent->titleCache;
$this->titleCache[] = $pdbk;
$this->loopCheckHash = /*clone*/ $parent->loopCheckHash;
if ( $pdbk !== false ) {
$this->loopCheckHash[$pdbk] = true;
}
$this->depth = $parent->depth + 1;
$this->numberedExpansionCache = $this->namedExpansionCache = array();
}
function __toString() {
$s = 'tplframe{';
$first = true;
$args = $this->numberedArgs + $this->namedArgs;
foreach ( $args as $name => $value ) {
if ( $first ) {
$first = false;
} else {
$s .= ', ';
}
$s .= "\"$name\":\"" .
str_replace( '"', '\\"', $value->__toString() ) . '"';
}
$s .= '}';
return $s;
}
/**
* Returns true if there are no arguments in this frame
*
* @return bool
*/
function isEmpty() {
return !count( $this->numberedArgs ) && !count( $this->namedArgs );
}
/**
* @return array
*/
function getArguments() {
$arguments = array();
foreach ( array_merge(
array_keys($this->numberedArgs),
array_keys($this->namedArgs)) as $key ) {
$arguments[$key] = $this->getArgument($key);
}
return $arguments;
}
/**
* @return array
*/
function getNumberedArguments() {
$arguments = array();
foreach ( array_keys($this->numberedArgs) as $key ) {
$arguments[$key] = $this->getArgument($key);
}
return $arguments;
}
/**
* @return array
*/
function getNamedArguments() {
$arguments = array();
foreach ( array_keys($this->namedArgs) as $key ) {
$arguments[$key] = $this->getArgument($key);
}
return $arguments;
}
/**
* @param $index
* @return array|bool
*/
function getNumberedArgument( $index ) {
if ( !isset( $this->numberedArgs[$index] ) ) {
return false;
}
if ( !isset( $this->numberedExpansionCache[$index] ) ) {
# No trimming for unnamed arguments
$this->numberedExpansionCache[$index] = $this->parent->expand( $this->numberedArgs[$index], PPFrame::STRIP_COMMENTS );
}
return $this->numberedExpansionCache[$index];
}
/**
* @param $name
* @return bool
*/
function getNamedArgument( $name ) {
if ( !isset( $this->namedArgs[$name] ) ) {
return false;
}
if ( !isset( $this->namedExpansionCache[$name] ) ) {
# Trim named arguments post-expand, for backwards compatibility
$this->namedExpansionCache[$name] = trim(
$this->parent->expand( $this->namedArgs[$name], PPFrame::STRIP_COMMENTS ) );
}
return $this->namedExpansionCache[$name];
}
/**
* @param $name
* @return array|bool
*/
function getArgument( $name ) {
$text = $this->getNumberedArgument( $name );
if ( $text === false ) {
$text = $this->getNamedArgument( $name );
}
return $text;
}
/**
* Return true if the frame is a template frame
*
* @return bool
*/
function isTemplate() {
return true;
}
}
/**
* Expansion frame with custom arguments
* @ingroup Parser
*/
class PPCustomFrame_HipHop extends PPFrame_HipHop {
var $args;
function __construct( $preprocessor, $args ) {
parent::__construct( $preprocessor );
$this->args = $args;
}
function __toString() {
$s = 'cstmframe{';
$first = true;
foreach ( $this->args as $name => $value ) {
if ( $first ) {
$first = false;
} else {
$s .= ', ';
}
$s .= "\"$name\":\"" .
str_replace( '"', '\\"', $value->__toString() ) . '"';
}
$s .= '}';
return $s;
}
/**
* @return bool
*/
function isEmpty() {
return !count( $this->args );
}
/**
* @param $index
* @return bool
*/
function getArgument( $index ) {
if ( !isset( $this->args[$index] ) ) {
return false;
}
return $this->args[$index];
}
}
/**
* @ingroup Parser
*/
class PPNode_HipHop_Tree implements PPNode {
var $name, $firstChild, $lastChild, $nextSibling;
function __construct( $name ) {
$this->name = $name;
$this->firstChild = $this->lastChild = $this->nextSibling = false;
}
function __toString() {
$inner = '';
$attribs = '';
for ( $node = $this->firstChild; $node; $node = $node->nextSibling ) {
if ( $node instanceof PPNode_HipHop_Attr ) {
$attribs .= ' ' . $node->name . '="' . htmlspecialchars( $node->value ) . '"';
} else {
$inner .= $node->__toString();
}
}
if ( $inner === '' ) {
return "<{$this->name}$attribs/>";
} else {
return "<{$this->name}$attribs>$inner</{$this->name}>";
}
}
/**
* @param $name
* @param $text
* @return PPNode_HipHop_Tree
*/
static function newWithText( $name, $text ) {
$obj = new self( $name );
$obj->addChild( new PPNode_HipHop_Text( $text ) );
return $obj;
}
function addChild( $node ) {
if ( $this->lastChild === false ) {
$this->firstChild = $this->lastChild = $node;
} else {
$this->lastChild->nextSibling = $node;
$this->lastChild = $node;
}
}
/**
* @return PPNode_HipHop_Array
*/
function getChildren() {
$children = array();
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
$children[] = $child;
}
return new PPNode_HipHop_Array( $children );
}
function getFirstChild() {
return $this->firstChild;
}
function getNextSibling() {
return $this->nextSibling;
}
function getChildrenOfType( $name ) {
$children = array();
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
if ( isset( $child->name ) && $child->name === $name ) {
$children[] = $name;
}
}
return $children;
}
/**
* @return bool
*/
function getLength() {
return false;
}
/**
* @param $i
* @return bool
*/
function item( $i ) {
return false;
}
/**
* @return string
*/
function getName() {
return $this->name;
}
/**
* Split a <part> node into an associative array containing:
* name PPNode name
* index String index
* value PPNode value
*
* @return array
*/
function splitArg() {
$bits = array();
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
if ( !isset( $child->name ) ) {
continue;
}
if ( $child->name === 'name' ) {
$bits['name'] = $child;
if ( $child->firstChild instanceof PPNode_HipHop_Attr
&& $child->firstChild->name === 'index' )
{
$bits['index'] = $child->firstChild->value;
}
} elseif ( $child->name === 'value' ) {
$bits['value'] = $child;
}
}
if ( !isset( $bits['name'] ) ) {
throw new MWException( 'Invalid brace node passed to ' . __METHOD__ );
}
if ( !isset( $bits['index'] ) ) {
$bits['index'] = '';
}
return $bits;
}
/**
* Split an <ext> node into an associative array containing name, attr, inner and close
* All values in the resulting array are PPNodes. Inner and close are optional.
*
* @return array
*/
function splitExt() {
$bits = array();
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
if ( !isset( $child->name ) ) {
continue;
}
if ( $child->name === 'name' ) {
$bits['name'] = $child;
} elseif ( $child->name === 'attr' ) {
$bits['attr'] = $child;
} elseif ( $child->name === 'inner' ) {
$bits['inner'] = $child;
} elseif ( $child->name === 'close' ) {
$bits['close'] = $child;
}
}
if ( !isset( $bits['name'] ) ) {
throw new MWException( 'Invalid ext node passed to ' . __METHOD__ );
}
return $bits;
}
/**
* Split an <h> node
*
* @return array
*/
function splitHeading() {
if ( $this->name !== 'h' ) {
throw new MWException( 'Invalid h node passed to ' . __METHOD__ );
}
$bits = array();
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
if ( !isset( $child->name ) ) {
continue;
}
if ( $child->name === 'i' ) {
$bits['i'] = $child->value;
} elseif ( $child->name === 'level' ) {
$bits['level'] = $child->value;
}
}
if ( !isset( $bits['i'] ) ) {
throw new MWException( 'Invalid h node passed to ' . __METHOD__ );
}
return $bits;
}
/**
* Split a <template> or <tplarg> node
*
* @return array
*/
function splitTemplate() {
$parts = array();
$bits = array( 'lineStart' => '' );
for ( $child = $this->firstChild; $child; $child = $child->nextSibling ) {
if ( !isset( $child->name ) ) {
continue;
}
if ( $child->name === 'title' ) {
$bits['title'] = $child;
}
if ( $child->name === 'part' ) {
$parts[] = $child;
}
if ( $child->name === 'lineStart' ) {
$bits['lineStart'] = '1';
}
}
if ( !isset( $bits['title'] ) ) {
throw new MWException( 'Invalid node passed to ' . __METHOD__ );
}
$bits['parts'] = new PPNode_HipHop_Array( $parts );
return $bits;
}
}
/**
* @ingroup Parser
*/
class PPNode_HipHop_Text implements PPNode {
var $value, $nextSibling;
function __construct( $value ) {
if ( is_object( $value ) ) {
throw new MWException( __CLASS__ . ' given object instead of string' );
}
$this->value = $value;
}
function __toString() {
return htmlspecialchars( $this->value );
}
function getNextSibling() {
return $this->nextSibling;
}
function getChildren() { return false; }
function getFirstChild() { return false; }
function getChildrenOfType( $name ) { return false; }
function getLength() { return false; }
function item( $i ) { return false; }
function getName() { return '#text'; }
function splitArg() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitExt() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitHeading() { throw new MWException( __METHOD__ . ': not supported' ); }
}
/**
* @ingroup Parser
*/
class PPNode_HipHop_Array implements PPNode {
var $value, $nextSibling;
function __construct( $value ) {
$this->value = $value;
}
function __toString() {
return var_export( $this, true );
}
function getLength() {
return count( $this->value );
}
function item( $i ) {
return $this->value[$i];
}
function getName() { return '#nodelist'; }
function getNextSibling() {
return $this->nextSibling;
}
function getChildren() { return false; }
function getFirstChild() { return false; }
function getChildrenOfType( $name ) { return false; }
function splitArg() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitExt() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitHeading() { throw new MWException( __METHOD__ . ': not supported' ); }
}
/**
* @ingroup Parser
*/
class PPNode_HipHop_Attr implements PPNode {
var $name, $value, $nextSibling;
function __construct( $name, $value ) {
$this->name = $name;
$this->value = $value;
}
function __toString() {
return "<@{$this->name}>" . htmlspecialchars( $this->value ) . "</@{$this->name}>";
}
function getName() {
return $this->name;
}
function getNextSibling() {
return $this->nextSibling;
}
function getChildren() { return false; }
function getFirstChild() { return false; }
function getChildrenOfType( $name ) { return false; }
function getLength() { return false; }
function item( $i ) { return false; }
function splitArg() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitExt() { throw new MWException( __METHOD__ . ': not supported' ); }
function splitHeading() { throw new MWException( __METHOD__ . ': not supported' ); }
}