1 files changed, 115 insertions, 0 deletions
diff --git a/includes/content/TextContentHandler.php b/includes/content/TextContentHandler.php
new file mode 100644
index 00000000..e7f41e18
--- /dev/null
+++ b/includes/content/TextContentHandler.php
@@ -0,0 +1,115 @@
+<?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 {
+
+	public function __construct( $modelId = CONTENT_MODEL_TEXT, $formats = array( CONTENT_FORMAT_TEXT ) ) {
+		parent::__construct( $modelId, $formats );
+	}
+
+	/**
+	 * Returns the content's text as-is.
+	 *
+	 * @param $content Content
+	 * @param $format string|null
+	 * @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 $oldContent Content|string  String
+	 * @param $myContent Content|string   String
+	 * @param $yourContent Content|string String
+	 *
+	 * @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;
+	}
+
+	/**
+	 * Unserializes a Content object of the type supported by this ContentHandler.
+	 *
+	 * @since 1.21
+	 *
+	 * @param $text   string serialized form of the content
+	 * @param $format null|String the format used for serialization
+	 *
+	 * @return Content the TextContent object wrapping $text
+	 */
+	public function unserializeContent( $text, $format = null ) {
+		$this->checkFormat( $format );
+
+		return new TextContent( $text );
+	}
+
+	/**
+	 * Creates an empty TextContent object.
+	 *
+	 * @since 1.21
+	 *
+	 * @return Content
+	 */
+	public function makeEmptyContent() {
+		return new TextContent( '' );
+	}
+}