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<?php
/**
* @todo document, briefly.
* @ingroup Parser
*/
class StripState {
protected $prefix;
protected $data;
protected $regex;
protected $tempType, $tempMergePrefix;
function __construct( $prefix ) {
$this->prefix = $prefix;
$this->data = array(
'nowiki' => array(),
'general' => array()
);
$this->regex = "/{$this->prefix}([^\x7f]+)" . Parser::MARKER_SUFFIX . '/';
}
/**
* Add a nowiki strip item
* @param $marker
* @param $value
*/
function addNoWiki( $marker, $value ) {
$this->addItem( 'nowiki', $marker, $value );
}
/**
* @param $marker
* @param $value
*/
function addGeneral( $marker, $value ) {
$this->addItem( 'general', $marker, $value );
}
/**
* @throws MWException
* @param $type
* @param $marker
* @param $value
*/
protected function addItem( $type, $marker, $value ) {
if ( !preg_match( $this->regex, $marker, $m ) ) {
throw new MWException( "Invalid marker: $marker" );
}
$this->data[$type][$m[1]] = $value;
}
/**
* @param $text
* @return mixed
*/
function unstripGeneral( $text ) {
return $this->unstripType( 'general', $text );
}
/**
* @param $text
* @return mixed
*/
function unstripNoWiki( $text ) {
return $this->unstripType( 'nowiki', $text );
}
/**
* @param $text
* @return mixed
*/
function unstripBoth( $text ) {
$text = $this->unstripType( 'general', $text );
$text = $this->unstripType( 'nowiki', $text );
return $text;
}
/**
* @param $type
* @param $text
* @return mixed
*/
protected function unstripType( $type, $text ) {
// Shortcut
if ( !count( $this->data[$type] ) ) {
return $text;
}
wfProfileIn( __METHOD__ );
$this->tempType = $type;
do {
$oldText = $text;
$text = preg_replace_callback( $this->regex, array( $this, 'unstripCallback' ), $text );
} while ( $text !== $oldText );
$this->tempType = null;
wfProfileOut( __METHOD__ );
return $text;
}
/**
* @param $m array
* @return array
*/
protected function unstripCallback( $m ) {
if ( isset( $this->data[$this->tempType][$m[1]] ) ) {
return $this->data[$this->tempType][$m[1]];
} else {
return $m[0];
}
}
/**
* Get a StripState object which is sufficient to unstrip the given text.
* It will contain the minimum subset of strip items necessary.
*
* @param $text string
*
* @return StripState
*/
function getSubState( $text ) {
$subState = new StripState( $this->prefix );
$pos = 0;
while ( true ) {
$startPos = strpos( $text, $this->prefix, $pos );
$endPos = strpos( $text, Parser::MARKER_SUFFIX, $pos );
if ( $startPos === false || $endPos === false ) {
break;
}
$endPos += strlen( Parser::MARKER_SUFFIX );
$marker = substr( $text, $startPos, $endPos - $startPos );
if ( !preg_match( $this->regex, $marker, $m ) ) {
continue;
}
$key = $m[1];
if ( isset( $this->data['nowiki'][$key] ) ) {
$subState->data['nowiki'][$key] = $this->data['nowiki'][$key];
} elseif ( isset( $this->data['general'][$key] ) ) {
$subState->data['general'][$key] = $this->data['general'][$key];
}
$pos = $endPos;
}
return $subState;
}
/**
* Merge another StripState object into this one. The strip marker keys
* will not be preserved. The strings in the $texts array will have their
* strip markers rewritten, the resulting array of strings will be returned.
*
* @param $otherState StripState
* @param $texts Array
* @return Array
*/
function merge( $otherState, $texts ) {
$mergePrefix = Parser::getRandomString();
foreach ( $otherState->data as $type => $items ) {
foreach ( $items as $key => $value ) {
$this->data[$type]["$mergePrefix-$key"] = $value;
}
}
$this->tempMergePrefix = $mergePrefix;
$texts = preg_replace_callback( $otherState->regex, array( $this, 'mergeCallback' ), $texts );
$this->tempMergePrefix = null;
return $texts;
}
protected function mergeCallback( $m ) {
$key = $m[1];
return "{$this->prefix}{$this->tempMergePrefix}-$key" . Parser::MARKER_SUFFIX;
}
/**
* Remove any strip markers found in the given text.
*
* @param $text Input string
* @return string
*/
function killMarkers( $text ) {
return preg_replace( $this->regex, '', $text );
}
}
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