wp/wp-includes/l10n.php
changeset 0 d970ebf37754
child 5 5e2f62d02dcd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/l10n.php	Wed Nov 06 03:21:17 2013 +0000
@@ -0,0 +1,805 @@
+<?php
+/**
+ * WordPress Translation API
+ *
+ * @package WordPress
+ * @subpackage i18n
+ */
+
+/**
+ * Get the current locale.
+ *
+ * If the locale is set, then it will filter the locale in the 'locale' filter
+ * hook and return the value.
+ *
+ * If the locale is not set already, then the WPLANG constant is used if it is
+ * defined. Then it is filtered through the 'locale' filter hook and the value
+ * for the locale global set and the locale is returned.
+ *
+ * The process to get the locale should only be done once, but the locale will
+ * always be filtered using the 'locale' hook.
+ *
+ * @since 1.5.0
+ *
+ * @return string The locale of the blog or from the 'locale' hook.
+ */
+function get_locale() {
+	global $locale;
+
+	if ( isset( $locale ) )
+		/**
+		 * Filter WordPress install's locale ID.
+		 *
+		 * @since 1.5.2
+		 *
+		 * @param string $locale The locale ID.
+		 */
+		return apply_filters( 'locale', $locale );
+
+	// WPLANG is defined in wp-config.
+	if ( defined( 'WPLANG' ) )
+		$locale = WPLANG;
+
+	// If multisite, check options.
+	if ( is_multisite() ) {
+		// Don't check blog option when installing.
+		if ( defined( 'WP_INSTALLING' ) || ( false === $ms_locale = get_option( 'WPLANG' ) ) )
+			$ms_locale = get_site_option('WPLANG');
+
+		if ( $ms_locale !== false )
+			$locale = $ms_locale;
+	}
+
+	if ( empty( $locale ) )
+		$locale = 'en_US';
+
+	// duplicate_hook
+	return apply_filters( 'locale', $locale );
+}
+
+/**
+ * Retrieve the translation of $text.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * <strong>Note:</strong> Don't use translate() directly, use __() or related functions.
+ *
+ * @since 2.2.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text
+ */
+function translate( $text, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translations = $translations->translate( $text );
+	/**
+	 * Filter text with its translation.
+	 *
+	 * @since 2.0.11
+	 *
+	 * @param string $translations Translated text.
+	 * @param string $text         Text to translate.
+	 * @param string $domain       Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'gettext', $translations, $text, $domain );
+}
+
+/**
+ * Remove last item on a pipe-delimited string.
+ *
+ * Meant for removing the last item in a string, such as 'Role name|User role'. The original
+ * string will be returned if no pipe '|' characters are found in the string.
+ *
+ * @since 2.8.0
+ *
+ * @param string $string A pipe-delimited string.
+ * @return string Either $string or everything before the last pipe.
+ */
+function before_last_bar( $string ) {
+	$last_bar = strrpos( $string, '|' );
+	if ( false == $last_bar )
+		return $string;
+	else
+		return substr( $string, 0, $last_bar );
+}
+
+/**
+ * Retrieve the translation of $text in the context defined in $context.
+ *
+ * If there is no translation, or the text domain isn't loaded the original
+ * text is returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text on success, original text on failure.
+ */
+function translate_with_gettext_context( $text, $context, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translations = $translations->translate( $text, $context );
+	/**
+	 * Filter text with its translation based on context information.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $translations Translated text.
+	 * @param string $text         Text to translate.
+	 * @param string $context      Context information for the translators.
+	 * @param string $domain       Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'gettext_with_context', $translations, $text, $context, $domain );
+}
+
+/**
+ * Retrieve the translation of $text. If there is no translation,
+ * or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.1.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text.
+ */
+function __( $text, $domain = 'default' ) {
+	return translate( $text, $domain );
+}
+
+/**
+ * Retrieve the translation of $text and escapes it for safe use in an attribute.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text on success, original text on failure.
+ */
+function esc_attr__( $text, $domain = 'default' ) {
+	return esc_attr( translate( $text, $domain ) );
+}
+
+/**
+ * Retrieve the translation of $text and escapes it for safe use in HTML output.
+ *
+ * If there is no translation, or the text domain isn't loaded, the original text is returned.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text
+ */
+function esc_html__( $text, $domain = 'default' ) {
+	return esc_html( translate( $text, $domain ) );
+}
+
+/**
+ * Display translated text.
+ *
+ * @since 1.2.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ */
+function _e( $text, $domain = 'default' ) {
+	echo translate( $text, $domain );
+}
+
+/**
+ * Display translated text that has been escaped for safe use in an attribute.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ */
+function esc_attr_e( $text, $domain = 'default' ) {
+	echo esc_attr( translate( $text, $domain ) );
+}
+
+/**
+ * Display translated text that has been escaped for safe use in HTML output.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text   Text to translate.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ */
+function esc_html_e( $text, $domain = 'default' ) {
+	echo esc_html( translate( $text, $domain ) );
+}
+
+/**
+ * Retrieve translated string with gettext context.
+ *
+ * Quite a few times, there will be collisions with similar translatable text
+ * found in more than two places, but with different translated context.
+ *
+ * By including the context in the pot file, translators can translate the two
+ * strings differently.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated context string without pipe.
+ */
+function _x( $text, $context, $domain = 'default' ) {
+	return translate_with_gettext_context( $text, $context, $domain );
+}
+
+/**
+ * Display translated string with gettext context.
+ *
+ * @since 3.0.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated context string without pipe.
+ */
+function _ex( $text, $context, $domain = 'default' ) {
+	echo _x( $text, $context, $domain );
+}
+
+/**
+ * Translate string with gettext context, and escapes it for safe use in an attribute.
+ *
+ * @since 2.8.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text
+ */
+function esc_attr_x( $text, $context, $domain = 'default' ) {
+	return esc_attr( translate_with_gettext_context( $text, $context, $domain ) );
+}
+
+/**
+ * Translate string with gettext context, and escapes it for safe use in HTML output.
+ *
+ * @since 2.9.0
+ *
+ * @param string $text    Text to translate.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Translated text.
+ */
+function esc_html_x( $text, $context, $domain = 'default' ) {
+	return esc_html( translate_with_gettext_context( $text, $context, $domain ) );
+}
+
+/**
+ * Retrieve the plural or single form based on the supplied amount.
+ *
+ * If the text domain is not set in the $l10n list, then a comparison will be made
+ * and either $plural or $single parameters returned.
+ *
+ * If the text domain does exist, then the parameters $single, $plural, and $number
+ * will first be passed to the text domain's ngettext method. Then it will be passed
+ * to the 'ngettext' filter hook along with the same parameters. The expected
+ * type will be a string.
+ *
+ * @since 2.8.0
+ *
+ * @param string $single The text that will be used if $number is 1.
+ * @param string $plural The text that will be used if $number is not 1.
+ * @param int    $number The number to compare against to use either $single or $plural.
+ * @param string $domain Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Either $single or $plural translated text.
+ */
+function _n( $single, $plural, $number, $domain = 'default' ) {
+	$translations = get_translations_for_domain( $domain );
+	$translation = $translations->translate_plural( $single, $plural, $number );
+	/**
+	 * Filter text with its translation when plural option is available.
+	 *
+	 * @since 2.2.0
+	 *
+	 * @param string $translation Translated text.
+	 * @param string $single      The text that will be used if $number is 1.
+	 * @param string $plural      The text that will be used if $number is not 1.
+	 * @param string $number      The number to compare against to use either $single or $plural.
+	 * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'ngettext', $translation, $single, $plural, $number, $domain );
+}
+
+/**
+ * Retrieve the plural or single form based on the supplied amount with gettext context.
+ *
+ * This is a hybrid of _n() and _x(). It supports contexts and plurals.
+ *
+ * @since 2.8.0
+ *
+ * @param string $single  The text that will be used if $number is 1.
+ * @param string $plural  The text that will be used if $number is not 1.
+ * @param int    $number  The number to compare against to use either $single or $plural.
+ * @param string $context Context information for the translators.
+ * @param string $domain  Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return string Either $single or $plural translated text with context.
+ */
+function _nx($single, $plural, $number, $context, $domain = 'default') {
+	$translations = get_translations_for_domain( $domain );
+	$translation = $translations->translate_plural( $single, $plural, $number, $context );
+	/**
+	 * Filter text with its translation while plural option and context are available.
+	 *
+	 * @since 2.8.0
+	 *
+	 * @param string $translation Translated text.
+	 * @param string $single      The text that will be used if $number is 1.
+	 * @param string $plural      The text that will be used if $number is not 1.
+	 * @param string $number      The number to compare against to use either $single or $plural.
+	 * @param string $context     Context information for the translators.
+	 * @param string $domain      Text domain. Unique identifier for retrieving translated strings.
+	 */
+	return apply_filters( 'ngettext_with_context', $translation, $single, $plural, $number, $context, $domain );
+}
+
+/**
+ * Register plural strings in POT file, but don't translate them.
+ *
+ * Used when you want to keep structures with translatable plural
+ * strings and use them later.
+ *
+ * Example:
+ * <code>
+ * $messages = array(
+ *  	'post' => _n_noop('%s post', '%s posts'),
+ *  	'page' => _n_noop('%s pages', '%s pages')
+ * );
+ * ...
+ * $message = $messages[$type];
+ * $usable_text = sprintf( translate_nooped_plural( $message, $count ), $count );
+ * </code>
+ *
+ * @since 2.5.0
+ *
+ * @param string $singular Single form to be i18ned.
+ * @param string $plural   Plural form to be i18ned.
+ * @param string $domain   Optional. Text domain. Unique identifier for retrieving translated strings.
+ * @return array array($singular, $plural)
+ */
+function _n_noop( $singular, $plural, $domain = null ) {
+	return array( 0 => $singular, 1 => $plural, 'singular' => $singular, 'plural' => $plural, 'context' => null, 'domain' => $domain );
+}
+
+/**
+ * Register plural strings with context in POT file, but don't translate them.
+ *
+ * @since 2.8.0
+ */
+function _nx_noop( $singular, $plural, $context, $domain = null ) {
+	return array( 0 => $singular, 1 => $plural, 2 => $context, 'singular' => $singular, 'plural' => $plural, 'context' => $context, 'domain' => $domain );
+}
+
+/**
+ * Translate the result of _n_noop() or _nx_noop().
+ *
+ * @since 3.1.0
+ *
+ * @param array  $nooped_plural Array with singular, plural and context keys, usually the result of _n_noop() or _nx_noop()
+ * @param int    $count         Number of objects
+ * @param string $domain        Optional. Text domain. Unique identifier for retrieving translated strings. If $nooped_plural contains
+ *                              a text domain passed to _n_noop() or _nx_noop(), it will override this value.
+ * @return string Either $single or $plural translated text.
+ */
+function translate_nooped_plural( $nooped_plural, $count, $domain = 'default' ) {
+	if ( $nooped_plural['domain'] )
+		$domain = $nooped_plural['domain'];
+
+	if ( $nooped_plural['context'] )
+		return _nx( $nooped_plural['singular'], $nooped_plural['plural'], $count, $nooped_plural['context'], $domain );
+	else
+		return _n( $nooped_plural['singular'], $nooped_plural['plural'], $count, $domain );
+}
+
+/**
+ * Load a .mo file into the text domain $domain.
+ *
+ * If the text domain already exists, the translations will be merged. If both
+ * sets have the same string, the translation from the original value will be taken.
+ *
+ * On success, the .mo file will be placed in the $l10n global by $domain
+ * and will be a MO object.
+ *
+ * @since 1.5.0
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param string $mofile Path to the .mo file.
+ * @return bool True on success, false on failure.
+ */
+function load_textdomain( $domain, $mofile ) {
+	global $l10n;
+
+	/**
+	 * Filter text domain and/or MO file path for loading translations.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param boolean        Whether to override the text domain. Default false.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 * @param string $mofile Path to the MO file.
+	 */
+	$plugin_override = apply_filters( 'override_load_textdomain', false, $domain, $mofile );
+
+	if ( true == $plugin_override ) {
+		return true;
+	}
+
+	/**
+	 * Fires before the MO translation file is loaded.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 * @param string $mofile Path to the .mo file.
+	 */
+	do_action( 'load_textdomain', $domain, $mofile );
+
+	/**
+	 * Filter MO file path for loading translations for a specific text domain.
+	 *
+	 * @since 2.9.0
+	 *
+	 * @param string $mofile Path to the MO file.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$mofile = apply_filters( 'load_textdomain_mofile', $mofile, $domain );
+
+	if ( !is_readable( $mofile ) ) return false;
+
+	$mo = new MO();
+	if ( !$mo->import_from_file( $mofile ) ) return false;
+
+	if ( isset( $l10n[$domain] ) )
+		$mo->merge_with( $l10n[$domain] );
+
+	$l10n[$domain] = &$mo;
+
+	return true;
+}
+
+/**
+ * Unload translations for a text domain.
+ *
+ * @since 3.0.0
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool Whether textdomain was unloaded.
+ */
+function unload_textdomain( $domain ) {
+	global $l10n;
+
+	/**
+	 * Filter text text domain for loading translation.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param boolean        Whether to override unloading the text domain. Default false.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$plugin_override = apply_filters( 'override_unload_textdomain', false, $domain );
+
+	if ( $plugin_override )
+		return true;
+
+	/**
+	 * Fires before the text domain is unloaded.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	do_action( 'unload_textdomain', $domain );
+
+	if ( isset( $l10n[$domain] ) ) {
+		unset( $l10n[$domain] );
+		return true;
+	}
+
+	return false;
+}
+
+/**
+ * Load default translated strings based on locale.
+ *
+ * Loads the .mo file in WP_LANG_DIR constant path from WordPress root.
+ * The translated (.mo) file is named based on the locale.
+ *
+ * @see load_textdomain()
+ *
+ * @since 1.5.0
+ */
+function load_default_textdomain() {
+	$locale = get_locale();
+
+	load_textdomain( 'default', WP_LANG_DIR . "/$locale.mo" );
+
+	if ( ( is_multisite() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) ) && ! file_exists(  WP_LANG_DIR . "/admin-$locale.mo" ) ) {
+		load_textdomain( 'default', WP_LANG_DIR . "/ms-$locale.mo" );
+		return;
+	}
+
+	if ( is_admin() || ( defined( 'WP_REPAIRING' ) && WP_REPAIRING ) )
+		load_textdomain( 'default', WP_LANG_DIR . "/admin-$locale.mo" );
+
+	if ( is_network_admin() || ( defined( 'WP_INSTALLING_NETWORK' ) && WP_INSTALLING_NETWORK ) )
+		load_textdomain( 'default', WP_LANG_DIR . "/admin-network-$locale.mo" );
+
+}
+
+/**
+ * Load a plugin's translated strings.
+ *
+ * If the path is not given then it will be the root of the plugin directory.
+ *
+ * The .mo file should be named based on the text domain with a dash, and then the locale exactly.
+ *
+ * @since 1.5.0
+ *
+ * @param string $domain          Unique identifier for retrieving translated strings
+ * @param string $deprecated      Use the $plugin_rel_path parameter instead.
+ * @param string $plugin_rel_path Optional. Relative path to WP_PLUGIN_DIR where the .mo file resides.
+ */
+function load_plugin_textdomain( $domain, $deprecated = false, $plugin_rel_path = false ) {
+	$locale = get_locale();
+	/**
+	 * Filter a plugin's locale.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $locale The plugin's current locale.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$locale = apply_filters( 'plugin_locale', $locale, $domain );
+
+	if ( false !== $plugin_rel_path	) {
+		$path = WP_PLUGIN_DIR . '/' . trim( $plugin_rel_path, '/' );
+	} else if ( false !== $deprecated ) {
+		_deprecated_argument( __FUNCTION__, '2.7' );
+		$path = ABSPATH . trim( $deprecated, '/' );
+	} else {
+		$path = WP_PLUGIN_DIR;
+	}
+
+	// Load the textdomain according to the plugin first
+	$mofile = $domain . '-' . $locale . '.mo';
+	if ( $loaded = load_textdomain( $domain, $path . '/'. $mofile ) )
+		return $loaded;
+
+	// Otherwise, load from the languages directory
+	$mofile = WP_LANG_DIR . '/plugins/' . $mofile;
+	return load_textdomain( $domain, $mofile );
+}
+
+/**
+ * Load the translated strings for a plugin residing in the mu-plugins directory.
+ *
+ * @since 3.0.0
+ *
+ * @param string $domain             Text domain. Unique identifier for retrieving translated strings.
+ * @param string $mu_plugin_rel_path Relative to WPMU_PLUGIN_DIR directory in which the .mo file resides.
+ *                                   Default empty string.
+ * @return bool True when textdomain is successfully loaded, false otherwise.
+ */
+function load_muplugin_textdomain( $domain, $mu_plugin_rel_path = '' ) {
+	// duplicate_hook
+	$locale = apply_filters( 'plugin_locale', get_locale(), $domain );
+	$path = trailingslashit( WPMU_PLUGIN_DIR . '/' . ltrim( $mu_plugin_rel_path, '/' ) );
+
+	// Load the textdomain according to the plugin first
+	$mofile = $domain . '-' . $locale . '.mo';
+	if ( $loaded = load_textdomain( $domain, $path . $mofile ) )
+		return $loaded;
+
+	// Otherwise, load from the languages directory
+	$mofile = WP_LANG_DIR . '/plugins/' . $mofile;
+	return load_textdomain( $domain, $mofile );
+}
+
+/**
+ * Load the theme's translated strings.
+ *
+ * If the current locale exists as a .mo file in the theme's root directory, it
+ * will be included in the translated strings by the $domain.
+ *
+ * The .mo files must be named based on the locale exactly.
+ *
+ * @since 1.5.0
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @param string $path   Optional. Path to the directory containing the .mo file.
+ *                       Default false.
+ * @return bool True when textdomain is successfully loaded, false otherwise.
+ */
+function load_theme_textdomain( $domain, $path = false ) {
+	$locale = get_locale();
+	/**
+	 * Filter a theme's locale.
+	 *
+	 * @since 3.0.0
+	 *
+	 * @param string $locale The theme's current locale.
+	 * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+	 */
+	$locale = apply_filters( 'theme_locale', $locale, $domain );
+
+	if ( ! $path )
+		$path = get_template_directory();
+
+	// Load the textdomain according to the theme
+	$mofile = "{$path}/{$locale}.mo";
+	if ( $loaded = load_textdomain( $domain, $mofile ) )
+		return $loaded;
+
+	// Otherwise, load from the languages directory
+	$mofile = WP_LANG_DIR . "/themes/{$domain}-{$locale}.mo";
+	return load_textdomain( $domain, $mofile );
+}
+
+/**
+ * Load the child themes translated strings.
+ *
+ * If the current locale exists as a .mo file in the child themes
+ * root directory, it will be included in the translated strings by the $domain.
+ *
+ * The .mo files must be named based on the locale exactly.
+ *
+ * @since 2.9.0
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool True when the theme textdomain is successfully loaded, false otherwise.
+ */
+function load_child_theme_textdomain( $domain, $path = false ) {
+	if ( ! $path )
+		$path = get_stylesheet_directory();
+	return load_theme_textdomain( $domain, $path );
+}
+
+/**
+ * Return the Translations instance for a text domain.
+ *
+ * If there isn't one, returns empty Translations instance.
+ *
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return Translations A Translations instance.
+ */
+function get_translations_for_domain( $domain ) {
+	global $l10n;
+	if ( !isset( $l10n[$domain] ) ) {
+		$l10n[$domain] = new NOOP_Translations;
+	}
+	return $l10n[$domain];
+}
+
+/**
+ * Whether there are translations for the text domain.
+ *
+ * @since 3.0.0
+ * @param string $domain Text domain. Unique identifier for retrieving translated strings.
+ * @return bool Whether there are translations.
+ */
+function is_textdomain_loaded( $domain ) {
+	global $l10n;
+	return isset( $l10n[$domain] );
+}
+
+/**
+ * Translates role name.
+ *
+ * Since the role names are in the database and not in the source there
+ * are dummy gettext calls to get them into the POT file and this function
+ * properly translates them back.
+ *
+ * The before_last_bar() call is needed, because older installs keep the roles
+ * using the old context format: 'Role name|User role' and just skipping the
+ * content after the last bar is easier than fixing them in the DB. New installs
+ * won't suffer from that problem.
+ *
+ * @since 2.8.0
+ *
+ * @param string $name The role name.
+ * @return string Translated role name on success, original name on failure.
+ */
+function translate_user_role( $name ) {
+	return translate_with_gettext_context( before_last_bar($name), 'User role' );
+}
+
+/**
+ * Get all available languages based on the presence of *.mo files in a given directory.
+ *
+ * The default directory is WP_LANG_DIR.
+ *
+ * @since 3.0.0
+ *
+ * @param string $dir A directory to search for language files.
+ *                    Default WP_LANG_DIR.
+ * @return array An array of language codes or an empty array if no languages are present. Language codes are formed by stripping the .mo extension from the language file names.
+ */
+function get_available_languages( $dir = null ) {
+	$languages = array();
+
+	foreach( (array)glob( ( is_null( $dir) ? WP_LANG_DIR : $dir ) . '/*.mo' ) as $lang_file ) {
+		$lang_file = basename($lang_file, '.mo');
+		if ( 0 !== strpos( $lang_file, 'continents-cities' ) && 0 !== strpos( $lang_file, 'ms-' ) &&
+			0 !== strpos( $lang_file, 'admin-' ))
+			$languages[] = $lang_file;
+	}
+
+	return $languages;
+}
+
+/**
+ * Get installed translations.
+ *
+ * Looks in the wp-content/languages directory for translations of
+ * plugins or themes.
+ *
+ * @since 3.7.0
+ *
+ * @param string $type What to search for. Accepts 'plugins', 'themes', 'core'.
+ * @return array Array of language data.
+ */
+function wp_get_installed_translations( $type ) {
+	if ( $type !== 'themes' && $type !== 'plugins' && $type !== 'core' )
+		return array();
+
+	$dir = 'core' === $type ? '' : "/$type";
+
+	if ( ! is_dir( WP_LANG_DIR ) )
+		return array();
+
+	if ( $dir && ! is_dir( WP_LANG_DIR . $dir ) )
+		return array();
+
+	$files = scandir( WP_LANG_DIR . $dir );
+	if ( ! $files )
+		return array();
+
+	$language_data = array();
+
+	foreach ( $files as $file ) {
+		if ( '.' === $file[0] || is_dir( $file ) )
+			continue;
+		if ( substr( $file, -3 ) !== '.po' )
+			continue;
+		if ( ! preg_match( '/(?:(.+)-)?([A-Za-z_]{2,6}).po/', $file, $match ) )
+			continue;
+
+		list( , $textdomain, $language ) = $match;
+		if ( '' === $textdomain )
+			$textdomain = 'default';
+		$language_data[ $textdomain ][ $language ] = wp_get_pomo_file_data( WP_LANG_DIR . "$dir/$file" );
+	}
+	return $language_data;
+}
+
+/**
+ * Extract headers from a PO file.
+ *
+ * @since 3.7.0
+ *
+ * @param string $po_file Path to PO file.
+ * @return array PO file headers.
+ */
+function wp_get_pomo_file_data( $po_file ) {
+	$headers = get_file_data( $po_file, array(
+		'POT-Creation-Date'  => '"POT-Creation-Date',
+		'PO-Revision-Date'   => '"PO-Revision-Date',
+		'Project-Id-Version' => '"Project-Id-Version',
+		'X-Generator'        => '"X-Generator',
+	) );
+	foreach ( $headers as $header => $value ) {
+		// Remove possible contextual '\n' and closing double quote.
+		$headers[ $header ] = preg_replace( '~(\\\n)?"$~', '', $value );
+	}
+	return $headers;
+}