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<?php
/**
* Base content handler class for flat text contents.
*
* 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
*
* @since 1.21
*
* @file
* @ingroup Content
*/
/**
* Base content handler implementation for flat text contents.
*
* @ingroup Content
*/
class TextContentHandler extends ContentHandler {
// @codingStandardsIgnoreStart bug 57585
public function __construct( $modelId = CONTENT_MODEL_TEXT,
$formats = [ CONTENT_FORMAT_TEXT ] ) {
parent::__construct( $modelId, $formats );
}
// @codingStandardsIgnoreEnd
/**
* Returns the content's text as-is.
*
* @param Content $content
* @param string $format The serialization format to check
*
* @return mixed
*/
public function serializeContent( Content $content, $format = null ) {
$this->checkFormat( $format );
return $content->getNativeData();
}
/**
* Attempts to merge differences between three versions. Returns a new
* Content object for a clean merge and false for failure or a conflict.
*
* All three Content objects passed as parameters must have the same
* content model.
*
* This text-based implementation uses wfMerge().
*
* @param Content $oldContent The page's previous content.
* @param Content $myContent One of the page's conflicting contents.
* @param Content $yourContent One of the page's conflicting contents.
*
* @return Content|bool
*/
public function merge3( Content $oldContent, Content $myContent, Content $yourContent ) {
$this->checkModelID( $oldContent->getModel() );
$this->checkModelID( $myContent->getModel() );
$this->checkModelID( $yourContent->getModel() );
$format = $this->getDefaultFormat();
$old = $this->serializeContent( $oldContent, $format );
$mine = $this->serializeContent( $myContent, $format );
$yours = $this->serializeContent( $yourContent, $format );
$ok = wfMerge( $old, $mine, $yours, $result );
if ( !$ok ) {
return false;
}
if ( !$result ) {
return $this->makeEmptyContent();
}
$mergedContent = $this->unserializeContent( $result, $format );
return $mergedContent;
}
/**
* Returns the name of the associated Content class, to
* be used when creating new objects. Override expected
* by subclasses.
*
* @since 1.24
*
* @return string
*/
protected function getContentClass() {
return 'TextContent';
}
/**
* Unserializes a Content object of the type supported by this ContentHandler.
*
* @since 1.21
*
* @param string $text Serialized form of the content
* @param string $format The format used for serialization
*
* @return Content The TextContent object wrapping $text
*/
public function unserializeContent( $text, $format = null ) {
$this->checkFormat( $format );
$class = $this->getContentClass();
return new $class( $text );
}
/**
* Creates an empty TextContent object.
*
* @since 1.21
*
* @return Content A new TextContent object with empty text.
*/
public function makeEmptyContent() {
$class = $this->getContentClass();
return new $class( '' );
}
/**
* @see ContentHandler::supportsDirectEditing
*
* @return bool Default is true for TextContent and derivatives.
*/
public function supportsDirectEditing() {
return true;
}
}