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<?php
namespace SMW;
use Parser;
use ParserOptions;
use Revision;
use Title;
use User;
/**
* Fetches the ParserOutput either by parsing an invoked text component,
* re-parsing a text revision, or accessing the ContentHandler to generate a
* ParserOutput object
*
* @ingroup SMW
*
* @licence GNU GPL v2+
* @since 1.9
*
* @author mwjames
*/
class ContentParser {
/** @var Title */
protected $title;
/** @var Parser */
protected $parser = null;
/** @var ParserOutput */
protected $parserOutput = null;
/** @var Revision */
protected $revision = null;
/** @var array */
protected $errors = [];
/**
* @var boolean
*/
private $enabledToUseContentHandler = true;
/**
* @var boolean
*/
private $skipInTextAnnotationParser = false;
/**
* @note Injecting new Parser() alone will not yield an expected result and
* doing new Parser( $GLOBALS['wgParserConf'] brings no benefits therefore
* we stick to the GLOBAL as fallback if no parser is injected.
*
* @since 1.9
*
* @param Title $title
* @param Parser|null $parser
*/
public function __construct( Title $title, Parser $parser = null ) {
$this->title = $title;
$this->parser = $parser;
if ( $this->parser === null ) {
$this->parser = $GLOBALS['wgParser'];
}
}
/**
* @since 2.3
*
* @return Parser $parser
*/
public function setParser( Parser $parser ) {
$this->parser = $parser;
}
/**
* @since 1.9.1
*
* @return ContentParser
*/
public function setRevision( Revision $revision = null ) {
$this->revision = $revision;
return $this;
}
/**
* @bug 62856 and #212
*
* @since 2.0
*/
public function forceToUseParser() {
$this->enabledToUseContentHandler = false;
}
/**
* @since 1.9
*
* @return Title
*/
public function getTitle() {
return $this->title;
}
/**
* @since 1.9
*
* @return ParserOutput|null
*/
public function getOutput() {
return $this->parserOutput;
}
/**
* @since 1.9
*
* @return array
*/
public function getErrors() {
return $this->errors;
}
public function skipInTextAnnotationParser() {
return $this->skipInTextAnnotationParser = true;
}
/**
* Generates or fetches the ParserOutput object from an appropriate source
*
* @since 1.9
*
* @param string|null $text
*
* @return ContentParser
*/
public function parse( $text = null ) {
if ( $text !== null ) {
return $this->parseText( $text );
}
if ( $this->hasContentHandler() && $this->enabledToUseContentHandler ) {
return $this->fetchFromContent();
}
return $this->fetchFromParser();
}
protected function parseText( $text ) {
$this->parserOutput = $this->parser->parse(
$text,
$this->getTitle(),
$this->makeParserOptions()
);
return $this;
}
/**
* @note Revision ID must be passed to the parser output to
* get revision variables correct
*
* @note If no content is available create an empty object
*/
protected function fetchFromContent() {
if ( $this->getRevision() === null ) {
return $this->msgForNullRevision();
}
$content = $this->getRevision()->getContent( Revision::RAW );
if ( !$content ) {
$content = $this->getRevision()->getContentHandler()->makeEmptyContent();
}
$this->parserOutput = $content->getParserOutput(
$this->getTitle(),
$this->getRevision()->getId(),
null,
true
);
return $this;
}
protected function fetchFromParser() {
if ( $this->getRevision() === null ) {
return $this->msgForNullRevision();
}
$this->parserOutput = $this->parser->parse(
$this->getRevision()->getText(),
$this->getTitle(),
$this->makeParserOptions(),
true,
true,
$this->getRevision()->getID()
);
return $this;
}
protected function msgForNullRevision( $fname = __METHOD__ ) {
$this->errors = [ $fname . " No revision available for {$this->getTitle()->getPrefixedDBkey()}" ];
return $this;
}
protected function makeParserOptions() {
$user = null;
if ( $this->getRevision() !== null ) {
$user = User::newFromId( $this->getRevision()->getUser() );
}
$parserOptions = new ParserOptions( $user );
// Use the InterfaceMessage marker to skip InTextAnnotationParser
// processing
$parserOptions->setInterfaceMessage( $this->skipInTextAnnotationParser );
return $parserOptions;
}
protected function getRevision() {
if ( $this->revision instanceof Revision ) {
return $this->revision;
}
// Revision::READ_NORMAL is not specified in MW 1.19
if ( defined( 'Revision::READ_NORMAL' ) ) {
$this->revision = Revision::newFromTitle( $this->getTitle(), false, Revision::READ_NORMAL );
} else {
$this->revision = Revision::newFromTitle( $this->getTitle() );
}
\Hooks::run( 'SMW::Parser::ChangeRevision', [ $this->getTitle(), &$this->revision ] );
return $this->revision;
}
protected function hasContentHandler() {
return defined( 'CONTENT_MODEL_WIKITEXT' );
}
}
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