a67cad6d0f
This causes RevisionStore to use FallbackContent instances to represent content for which no content handler is defined. This may happen when loading revisions using a model that was defined by an extension that has since been uninstalled. Bug: T220594 Bug: T220793 Bug: T228921 Change-Id: I5cc9e61223ab22406091479617b077512aa6ae2d
117 lines
3.2 KiB
PHP
117 lines
3.2 KiB
PHP
<?php
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/**
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* Base content handler class for flat text contents.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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* http://www.gnu.org/copyleft/gpl.html
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*
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* @since 1.34
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*
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* @file
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* @ingroup Content
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*/
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/**
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* Content handler implementation for unknown content.
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*
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* This can be used to handle content for which no ContentHandler exists on the system,
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* perhaps because the extension that provided it has been removed.
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*
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* @ingroup Content
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*/
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class FallbackContentHandler extends ContentHandler {
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/**
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* Constructs an UnknownContentHandler. Since UnknownContentHandler can be registered
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* for multiple model IDs on a system, multiple instances of UnknownContentHandler may
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* coexist.
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*
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* To preserve the serialization format of the original content model, it must be supplied
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* to the constructor via the $formats parameter. If not given, the default format is
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* reported as 'application/octet-stream'.
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*
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* @param string $modelId
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* @param string[]|null $formats
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*/
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public function __construct( $modelId, $formats = null ) {
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parent::__construct(
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$modelId,
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$formats ?? [
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'application/octet-stream',
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'application/unknown',
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'application/x-binary',
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'text/unknown',
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'unknown/unknown',
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]
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);
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}
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/**
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* Returns the content's data as-is.
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*
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* @param Content $content
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* @param string|null $format The serialization format to check
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*
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* @return mixed
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*/
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public function serializeContent( Content $content, $format = null ) {
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/** @var FallbackContent $content */
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'@phan-var FallbackContent $content';
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return $content->getData();
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}
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/**
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* Constructs an UnknownContent instance wrapping the given data.
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*
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* @since 1.21
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*
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* @param string $blob serialized content in an unknown format
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* @param string|null $format ignored
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*
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* @return Content The UnknownContent object wrapping $data
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*/
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public function unserializeContent( $blob, $format = null ) {
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return new FallbackContent( $blob, $this->getModelID() );
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}
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/**
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* Creates an empty UnknownContent object.
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*
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* @since 1.21
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*
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* @return Content A new UnknownContent object with empty text.
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*/
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public function makeEmptyContent() {
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return $this->unserializeContent( '' );
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}
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/**
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* @return false
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*/
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public function supportsDirectEditing() {
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return false;
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}
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/**
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* @param IContextSource $context
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*
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* @return SlotDiffRenderer
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*/
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protected function getSlotDiffRendererInternal( IContextSource $context ) {
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return new UnsupportedSlotDiffRenderer( $context );
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}
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}
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class_alias( FallbackContentHandler::class, 'UnknownContentHandler' );
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