View file upload/library/XenForo/ViewPublic/Conversation/ViewMessage.php

<?php

class XenForo_ViewPublic_Conversation_ViewMessage extends XenForo_ViewPublic_Base
{
	public function renderHtml()
	{
		$bbCodeParser = XenForo_BbCode_Parser::create(XenForo_BbCode_Formatter_Base::create('Base', array('view' => $this)));
		$bbCodeOptions = array(
			'states' => array(
				'viewAttachments' => $this->_params['canViewAttachments']
			)
		);

		$this->_params['message']['messageHtml'] = XenForo_ViewPublic_Helper_Message::getBbCodeWrapper(
			$this->_params['message'], $bbCodeParser, $bbCodeOptions);
	}
}