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115 lines
3.2 KiB
PHP
115 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 1.21
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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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* Base content handler implementation for flat text contents.
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*
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* @ingroup Content
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*/
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class TextContentHandler extends ContentHandler {
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public function __construct( $modelId = CONTENT_MODEL_TEXT, $formats = array( CONTENT_FORMAT_TEXT ) ) {
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parent::__construct( $modelId, $formats );
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}
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/**
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* Returns the content's text as-is.
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*
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* @param $content Content
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* @param $format string|null
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* @return mixed
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*/
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public function serializeContent( Content $content, $format = null ) {
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$this->checkFormat( $format );
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return $content->getNativeData();
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}
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/**
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* Attempts to merge differences between three versions. Returns a new
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* Content object for a clean merge and false for failure or a conflict.
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*
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* All three Content objects passed as parameters must have the same
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* content model.
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*
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* This text-based implementation uses wfMerge().
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*
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* @param $oldContent Content|string String
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* @param $myContent Content|string String
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* @param $yourContent Content|string String
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*
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* @return Content|Bool
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*/
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public function merge3( Content $oldContent, Content $myContent, Content $yourContent ) {
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$this->checkModelID( $oldContent->getModel() );
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$this->checkModelID( $myContent->getModel() );
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$this->checkModelID( $yourContent->getModel() );
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$format = $this->getDefaultFormat();
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$old = $this->serializeContent( $oldContent, $format );
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$mine = $this->serializeContent( $myContent, $format );
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$yours = $this->serializeContent( $yourContent, $format );
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$ok = wfMerge( $old, $mine, $yours, $result );
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if ( !$ok ) {
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return false;
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}
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if ( !$result ) {
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return $this->makeEmptyContent();
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}
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$mergedContent = $this->unserializeContent( $result, $format );
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return $mergedContent;
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}
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/**
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* Unserializes a Content object of the type supported by this ContentHandler.
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*
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* @since 1.21
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*
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* @param $text string serialized form of the content
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* @param $format null|String the format used for serialization
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*
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* @return Content the TextContent object wrapping $text
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*/
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public function unserializeContent( $text, $format = null ) {
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$this->checkFormat( $format );
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return new TextContent( $text );
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}
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/**
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* Creates an empty TextContent object.
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*
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* @since 1.21
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*
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* @return Content
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*/
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public function makeEmptyContent() {
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return new TextContent( '' );
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}
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}
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