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+<?php
+/**
+ * Wrapper content object allowing to handle a system message as a Content object.
+ *
+ * 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
+ *
+ * @author Daniel Kinzler
+ */
+
+/**
+ * Wrapper allowing us to handle a system message as a Content object.
+ * Note that this is generally *not* used to represent content from the
+ * MediaWiki namespace, and that there is no MessageContentHandler.
+ * MessageContent is just intended as glue for wrapping a message programatically.
+ *
+ * @ingroup Content
+ */
+class MessageContent extends AbstractContent {
+
+ /**
+ * @var Message
+ */
+ protected $mMessage;
+
+ /**
+ * @param Message|String $msg A Message object, or a message key
+ * @param array|null $params An optional array of message parameters
+ */
+ public function __construct( $msg, $params = null ) {
+ # XXX: messages may be wikitext, html or plain text! and maybe even something else entirely.
+ parent::__construct( CONTENT_MODEL_WIKITEXT );
+
+ if ( is_string( $msg ) ) {
+ $this->mMessage = wfMessage( $msg );
+ } else {
+ $this->mMessage = clone $msg;
+ }
+
+ if ( $params ) {
+ $this->mMessage = $this->mMessage->params( $params );
+ }
+ }
+
+ /**
+ * Returns the message as rendered HTML
+ *
+ * @return string The message text, parsed into html
+ */
+ public function getHtml() {
+ return $this->mMessage->parse();
+ }
+
+ /**
+ * Returns the message as rendered HTML
+ *
+ * @return string The message text, parsed into html
+ */
+ public function getWikitext() {
+ return $this->mMessage->text();
+ }
+
+ /**
+ * Returns the message object, with any parameters already substituted.
+ *
+ * @return Message The message object.
+ */
+ public function getNativeData() {
+ //NOTE: Message objects are mutable. Cloning here makes MessageContent immutable.
+ return clone $this->mMessage;
+ }
+
+ /**
+ * @see Content::getTextForSearchIndex
+ */
+ public function getTextForSearchIndex() {
+ return $this->mMessage->plain();
+ }
+
+ /**
+ * @see Content::getWikitextForTransclusion
+ */
+ public function getWikitextForTransclusion() {
+ return $this->getWikitext();
+ }
+
+ /**
+ * @see Content::getTextForSummary
+ */
+ public function getTextForSummary( $maxlength = 250 ) {
+ return substr( $this->mMessage->plain(), 0, $maxlength );
+ }
+
+ /**
+ * @see Content::getSize
+ *
+ * @return int
+ */
+ public function getSize() {
+ return strlen( $this->mMessage->plain() );
+ }
+
+ /**
+ * @see Content::copy
+ *
+ * @return Content. A copy of this object
+ */
+ public function copy() {
+ // MessageContent is immutable (because getNativeData() returns a clone of the Message object)
+ return $this;
+ }
+
+ /**
+ * @see Content::isCountable
+ *
+ * @return bool false
+ */
+ public function isCountable( $hasLinks = null ) {
+ return false;
+ }
+
+ /**
+ * @see Content::getParserOutput
+ *
+ * @return ParserOutput
+ */
+ public function getParserOutput(
+ Title $title, $revId = null,
+ ParserOptions $options = null, $generateHtml = true
+ ) {
+
+ if ( $generateHtml ) {
+ $html = $this->getHtml();
+ } else {
+ $html = '';
+ }
+
+ $po = new ParserOutput( $html );
+ return $po;
+ }
+}