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<?php
namespace MediaWiki\OutputTransform;
use MediaWiki\Parser\ParserOptions;
use MediaWiki\Parser\ParserOutput;
use MediaWiki\Parser\ParserOutputFlags;
use MediaWiki\Parser\Parsoid\PageBundleParserOutputConverter;
/**
* @unstable
*/
class OutputTransformPipeline {
/** @var OutputTransformStage[] */
private array $stages = [];
public function addStage( OutputTransformStage $stage ): OutputTransformPipeline {
$this->stages[] = $stage;
return $this;
}
/**
* Runs the pipeline on the ParserOutput, yielding a transformed ParserOutput.
* @param ParserOutput $in Parser output to which the transformations are
* applied. It is typically copied before applying transformations and is
* hence not mutated by this method, but if $options['allowClone'] is
* set it to false WILL be mutated!
* @param ?ParserOptions $popts - will eventually replace options as container
* for transformation options
* @param array $options Transformations to apply to the HTML
* - allowClone: (bool) Whether to clone the ParserOutput before
* applying transformations. Default is true.
* - allowTOC: (bool) Show the TOC, assuming there were enough headings
* to generate one and `__NOTOC__` wasn't used. Default is true,
* but might be statefully overridden.
* - injectTOC: (bool) Replace the TOC_PLACEHOLDER with TOC contents;
* otherwise the marker will be left in the article (and the skin
* will be responsible for replacing or removing it). Default is
* true.
* - enableSectionEditLinks: (bool) Include section edit links, assuming
* section edit link tokens are present in the HTML. Default is true,
* but might be statefully overridden.
* - userLang: (Language) Language object used for localizing UX messages,
* for example the heading of the table of contents. If omitted, will
* use the language of the main request context.
* - skin: (Skin) Skin object used for transforming section edit links.
* - unwrap: (bool) Return text without a wrapper div. Default is false,
* meaning a wrapper div will be added if getWrapperDivClass() returns
* a non-empty string.
* - wrapperDivClass: (string) Wrap the output in a div and apply the given
* CSS class to that div. This overrides the output of getWrapperDivClass().
* Setting this to an empty string has the same effect as 'unwrap' => true.
* - deduplicateStyles: (bool) When true, which is the default, `<style>`
* tags with the `data-mw-deduplicate` attribute set are deduplicated by
* value of the attribute: all but the first will be replaced by `<link
* rel="mw-deduplicated-inline-style" href="mw-data:..."/>` tags, where
* the scheme-specific-part of the href is the (percent-encoded) value
* of the `data-mw-deduplicate` attribute.
* - absoluteURLs: (bool) use absolute URLs in all links. Default: false
* - includeDebugInfo: (bool) render PP limit report in HTML. Default: false
*/
public function run( ParserOutput $in, ?ParserOptions $popts, array $options ): ParserOutput {
// Initialize some $options from the ParserOutput
$options += [
'enableSectionEditLinks' => !$in->getOutputFlag( ParserOutputFlags::NO_SECTION_EDIT_LINKS ),
'wrapperDivClass' => $in->getWrapperDivClass(),
'isParsoidContent' => PageBundleParserOutputConverter::hasPageBundle( $in ),
];
if ( $options['allowClone'] ?? true ) {
$out = clone $in;
} else {
// T353257: This should be a clone, but we've need to suppress it
// for some legacy codepaths.
$out = $in;
}
foreach ( $this->stages as $stage ) {
if ( $stage->shouldRun( $out, $popts, $options ) ) {
// Some stages may (for now) modify $options. See OutputTransformStage documentation for more info.
$out = $stage->transform( $out, $popts, $options );
}
}
return $out;
}
}