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+<?php
+/**
+ * A title formatter service for %MediaWiki.
+ *
+ * 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
+ *
+ * @file
+ * @license GPL 2+
+ * @author Daniel Kinzler
+ */
+
+/**
+ * A title formatter service for MediaWiki.
+ *
+ * This is designed to encapsulate knowledge about conventions for the title
+ * forms to be used in the database, in urls, in wikitext, etc.
+ *
+ * @see https://www.mediawiki.org/wiki/Requests_for_comment/TitleValue
+ */
+interface TitleFormatter {
+ /**
+ * Returns the title formatted for display.
+ * Per default, this includes the namespace but not the fragment.
+ *
+ * @note Normalization is applied if $title is not in TitleValue::TITLE_FORM.
+ *
+ * @param int|bool $namespace The namespace ID (or false, if the namespace should be ignored)
+ * @param string $text The page title
+ * @param string $fragment The fragment name (may be empty).
+ *
+ * @return string
+ */
+ public function formatTitle( $namespace, $text, $fragment = '' );
+
+ /**
+ * Returns the title text formatted for display, without namespace of fragment.
+ *
+ * @note Only minimal normalization is applied. Consider using TitleValue::getText() directly.
+ *
+ * @param TitleValue $title The title to format
+ *
+ * @return string
+ */
+ public function getText( TitleValue $title );
+
+ /**
+ * Returns the title formatted for display, including the namespace name.
+ *
+ * @param TitleValue $title The title to format
+ *
+ * @return string
+ */
+ public function getPrefixedText( TitleValue $title );
+
+ /**
+ * Returns the title formatted for display, with namespace and fragment.
+ *
+ * @param TitleValue $title The title to format
+ *
+ * @return string
+ */
+ public function getFullText( TitleValue $title );
+
+ /**
+ * Returns the name of the namespace for the given title.
+ *
+ * @note This must take into account gender sensitive namespace names.
+ * @todo Move this to a separate interface
+ *
+ * @param int $namespace
+ * @param string $text
+ *
+ * @throws InvalidArgumentException
+ * @return string
+ */
+ public function getNamespaceName( $namespace, $text );
+}