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<?php |
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/** |
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* @package Polylang |
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*/ |
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|
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/** |
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* Choose the language when it is set from content |
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* The language is set either in parse_query with priority 2 or in wp with priority 5 |
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* |
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* @since 1.2 |
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*/ |
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class PLL_Choose_Lang_Content extends PLL_Choose_Lang { |
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|
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/** |
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* Defers the language choice to the 'wp' action (when the content is known) |
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* |
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* @since 1.8 |
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* |
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* @return void |
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*/ |
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public function init() { |
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parent::init(); |
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|
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if ( ! did_action( 'pll_language_defined' ) ) { |
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// Set the languages from content |
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add_action( 'wp', array( $this, 'wp' ), 5 ); // Priority 5 for post types and taxonomies registered in wp hook with default priority |
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} |
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} |
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|
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/** |
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* Overwrites parent::set_language to remove the 'wp' action if the language is set before. |
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* |
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* @since 1.2 |
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* |
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* @param PLL_Language|false $curlang Optional. Current language. Default is `false`. |
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* @return void |
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*/ |
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protected function set_language( $curlang = false ): void { |
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parent::set_language( $curlang ); |
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remove_action( 'wp', array( $this, 'wp' ), 5 ); // won't attempt to set the language a 2nd time |
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} |
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|
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/** |
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* Returns the language based on the queried content. |
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* |
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* @since 1.2 |
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* @since 3.8 Renamed from `get_language_from_content()`. |
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* |
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* @return PLL_Language|false |
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*/ |
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protected function get_current_language() { |
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global $wp_query; |
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if ( ! isset( $wp_query ) ) { |
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return false; |
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} |
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|
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// No language set for 404. |
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if ( is_404() || ( is_attachment() && ! $this->options['media_support'] ) ) { |
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return false; |
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} |
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|
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$var = get_query_var( 'lang' ); |
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|
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if ( ! empty( $var ) && is_string( $var ) ) { |
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$lang = explode( ',', $var ); |
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return $this->model->get_language( reset( $lang ) ); // Choose the first queried language. |
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} |
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|
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if ( is_singular() ) { |
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foreach ( $this->get_singular_query_vars() as $var ) { |
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if ( ! empty( $var ) && is_numeric( $var ) ) { |
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return $this->model->post->get_language( (int) $var ); |
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} |
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} |
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} |
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|
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foreach ( $this->model->get_translated_taxonomies() as $taxonomy ) { |
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$tax_object = get_taxonomy( $taxonomy ); |
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|
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if ( empty( $tax_object ) || empty( $tax_object->query_var ) ) { |
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continue; |
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} |
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|
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$var = get_query_var( $tax_object->query_var ); |
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|
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if ( ! is_string( $var ) || empty( $var ) ) { |
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continue; |
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} |
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|
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$term = get_term_by( 'slug', $var, $taxonomy ); |
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|
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if ( ! $term instanceof WP_Term ) { |
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continue; |
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} |
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|
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return $this->model->term->get_language( $term->term_id ); |
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} |
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|
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return false; |
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} |
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|
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/** |
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* Returns the values of query vars corresponding to "singular" pages. |
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* |
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* @since 3.8 |
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* |
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* @return Generator |
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*/ |
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private function get_singular_query_vars(): Generator { |
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yield get_queried_object_id(); |
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yield get_query_var( 'p' ); |
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yield get_query_var( 'page_id' ); |
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yield get_query_var( 'attachment_id' ); |
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} |
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|
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/** |
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* Sets the language for the home page. |
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* Adds the lang query var when querying archives with no language code. |
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* |
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* @since 1.2 |
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* |
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* @param WP_Query $query Instance of WP_Query. |
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* @return void |
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*/ |
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public function parse_main_query( $query ) { |
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if ( empty( $GLOBALS['wp_the_query'] ) || $query !== $GLOBALS['wp_the_query'] ) { |
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return; |
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} |
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|
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$qv = $query->query_vars; |
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|
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// Homepage is requested, let's set the language |
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// Take care to avoid posts page for which is_home = 1 |
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if ( empty( $query->query ) && ( is_home() || is_page() ) ) { |
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$this->set_language( $this->get_home_language() ); |
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$this->home_requested(); |
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} |
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|
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parent::parse_main_query( $query ); |
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|
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$is_archive = ( count( $query->query ) == 1 && ! empty( $qv['paged'] ) ) || |
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$query->is_date || |
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$query->is_author || |
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( ! empty( $qv['post_type'] ) && $query->is_post_type_archive && $this->model->is_translated_post_type( $qv['post_type'] ) ); |
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|
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// Sets the language in case we hide the default language |
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// Use $query->query['s'] as is_search is not set when search is empty |
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// http://wordpress.org/support/topic/search-for-empty-string-in-default-language |
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if ( $this->options['hide_default'] && ! isset( $qv['lang'] ) && ( $is_archive || isset( $query->query['s'] ) || ( count( $query->query ) == 1 && ! empty( $qv['feed'] ) ) ) ) { |
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$this->set_language( $this->model->get_default_language() ); |
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$this->set_curlang_in_query( $query ); |
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} |
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} |
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|
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/** |
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* Sets the language from content. |
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* |
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* @since 1.2 |
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* |
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* @return void |
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*/ |
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public function wp(): void { |
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parent::set_language(); |
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} |
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} |
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|
