name : choose-lang-content.php <?php /** * Choose the language when it is set from content * The language is set either in parse_query with priority 2 or in wp with priority 5 * * @since 1.2 */ class PLL_Choose_Lang_Content extends PLL_Choose_Lang { /** * Defers the language choice to the 'wp' action (when the content is known) * * @since 1.8 */ public function init() { parent::init(); if ( ! did_action( 'pll_language_defined' ) ) { // Set the languages from content add_action( 'wp', array( $this, 'wp' ), 5 ); // Priority 5 for post types and taxonomies registered in wp hook with default priority // If no language found, choose the preferred one add_filter( 'pll_get_current_language', array( $this, 'pll_get_current_language' ) ); } } /** * Overwrites parent::set_language to remove the 'wp' action if the language is set before * * @since 1.2 * * @param object $curlang current language */ protected function set_language( $curlang ) { parent::set_language( $curlang ); remove_action( 'wp', array( $this, 'wp' ), 5 ); // won't attempt to set the language a 2nd time } /** * Returns the language based on the queried content * * @since 1.2 * * @return object|bool detected language, false if none was found */ protected function get_language_from_content() { // No language set for 404 if ( is_404() || ( is_attachment() && ! $this->options['media_support'] ) ) { return $this->get_preferred_language(); } if ( $var = get_query_var( 'lang' ) ) { $lang = explode( ',', $var ); $lang = $this->model->get_language( reset( $lang ) ); // Choose the first queried language } elseif ( ( is_single() || is_page() || ( is_attachment() && $this->options['media_support'] ) ) && ( ( $var = get_queried_object_id() ) || ( $var = get_query_var( 'p' ) ) || ( $var = get_query_var( 'page_id' ) ) || ( $var = get_query_var( 'attachment_id' ) ) ) ) { $lang = $this->model->post->get_language( $var ); } else { foreach ( $this->model->get_translated_taxonomies() as $taxonomy ) { if ( $var = get_query_var( get_taxonomy( $taxonomy )->query_var ) ) { $lang = $this->model->term->get_language( $var, $taxonomy ); } } } /** * Filter the language before it is set from the content * * @since 0.9 * * @param bool|object $lang language object or false if none was found */ return apply_filters( 'pll_get_current_language', isset( $lang ) ? $lang : false ); } /** * Sets the language for home page * Add the lang query var when querying archives with no language code * * @since 1.2 * * @param object $query instance of WP_Query */ public function parse_main_query( $query ) { if ( $query !== $GLOBALS['wp_the_query'] ) { return; } $qv = $query->query_vars; // Homepage is requested, let's set the language // Take care to avoid posts page for which is_home = 1 if ( empty( $query->query ) && ( is_home() || is_page() ) ) { $this->home_language(); $this->home_requested(); } parent::parse_main_query( $query ); $is_archive = ( count( $query->query ) == 1 && ! empty( $qv['paged'] ) ) || $query->is_date || $query->is_author || ( ! empty( $qv['post_type'] ) && $query->is_post_type_archive && $this->model->is_translated_post_type( $qv['post_type'] ) ); // Sets the language in case we hide the default language // Use $query->query['s'] as is_search is not set when search is empty // http://wordpress.org/support/topic/search-for-empty-string-in-default-language if ( $this->options['hide_default'] && ! isset( $qv['lang'] ) && ( $is_archive || isset( $query->query['s'] ) || ( count( $query->query ) == 1 && ! empty( $qv['feed'] ) ) ) ) { $this->set_language( $this->model->get_language( $this->options['default_lang'] ) ); $this->set_curlang_in_query( $query ); } } /** * Sets the language from content * * @since 1.2 */ public function wp() { // Nothing to do if the language has already been set ( although normally the filter has been removed ) if ( ! $this->curlang && $curlang = $this->get_language_from_content() ) { parent::set_language( $curlang ); } } /** * If no language found by get_language_from_content, return the preferred one * * @since 0.9 * * @param object|bool $lang Language found in get_language_from_content * @return object Language */ public function pll_get_current_language( $lang ) { return ! $lang ? $this->get_preferred_language() : $lang; } }