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<?php
/**
* Interfaces for preprocessors
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
* @ingroup Parser
*/
namespace MediaWiki\Parser;
use Wikimedia\ObjectCache\WANObjectCache;
/**
* @ingroup Parser
*/
abstract class Preprocessor {
/** Transclusion mode flag for Preprocessor::preprocessToObj() */
public const DOM_FOR_INCLUSION = 1;
/** Language conversion construct omission flag for Preprocessor::preprocessToObj() */
public const DOM_LANG_CONVERSION_DISABLED = 2;
/** Preprocessor cache bypass flag for Preprocessor::preprocessToObj */
public const DOM_UNCACHED = 4;
// Does preprocessing start in Start-Of-Line(SOL) state? Only relevant for Parsoid
// content, since Parsoid models templates as independent documents in SOL start.
// This flag is never set by the legacy parser (but see T2529 which has a similar
// effect).
public const START_IN_SOL_STATE = 8;
/** @var Parser */
public $parser;
/** @var WANObjectCache */
protected $wanCache;
/** @var bool Whether language variant conversion is disabled */
protected $disableLangConversion;
/** @var array Brace matching rules */
protected $rules = [
'{' => [
'end' => '}',
'names' => [
2 => 'template',
3 => 'tplarg',
],
'min' => 2,
'max' => 3,
],
'[' => [
'end' => ']',
'names' => [ 2 => null ],
'min' => 2,
'max' => 2,
],
'-{' => [
'end' => '}-',
'names' => [ 2 => null ],
'min' => 2,
'max' => 2,
],
];
/**
* @param Parser $parser
* @param WANObjectCache|null $wanCache
* @param array $options Map of additional options, including:
* - disableLangConversion: disable language variant conversion. [Default: false]
*/
public function __construct(
Parser $parser,
?WANObjectCache $wanCache = null,
array $options = []
) {
$this->parser = $parser;
$this->wanCache = $wanCache ?: WANObjectCache::newEmpty();
$this->disableLangConversion = !empty( $options['disableLangConversion'] );
}
/**
* Allows resetting the internal Parser reference after Preprocessor is
* cloned.
*
* Do not use this function in new code, since this method will be
* moved once Parser cloning goes away (T250448)
*
* @param ?Parser $parser
* @internal
*/
public function resetParser( ?Parser $parser ) {
// @phan-suppress-next-line PhanPossiblyNullTypeMismatchProperty For internal use only
$this->parser = $parser;
}
/**
* Create a new top-level frame for expansion of a page
*
* @return PPFrame
*/
abstract public function newFrame();
/**
* Create a new custom frame for programmatic use of parameter replacement
*
* This is useful for certain types of extensions
*
* @param array $args
* @return PPFrame
*/
abstract public function newCustomFrame( $args );
/**
* Create a new custom node for programmatic use of parameter replacement
*
* This is useful for certain types of extensions
*
* @param array $values
*/
abstract public function newPartNodeArray( $values );
/**
* Get the document object model for the given wikitext
*
* Any flag added to the $flags parameter here, or any other parameter liable to cause
* a change in the DOM tree for the given wikitext, must be passed through the section
* identifier in the section edit link and thus back to extractSections().
*
* @param string $text Wikitext
* @param int $flags Bit field of Preprocessor::DOM_* flags:
* - Preprocessor::DOM_FOR_INCLUSION: treat the wikitext as transcluded content from
* a page rather than direct content of a page or message. By default, the text is
* assumed to be undergoing processing for use by direct page views. The use of this
* flag causes text within <noinclude> tags to be ignored, text within <includeonly>
* to be included, and text outside of <onlyinclude> to be ignored.
* - Preprocessor::DOM_NO_LANG_CONV: do not parse "-{ ... }-" constructs, which are
* involved in language variant conversion. (deprecated since 1.36)
* - Preprocessor::DOM_UNCACHED: disable use of the preprocessor cache.
* @return PPNode
*/
abstract public function preprocessToObj( $text, $flags = 0 );
}
/** @deprecated class alias since 1.43 */
class_alias( Preprocessor::class, 'Preprocessor' );