Viewing file:  choose-lang-content.php (4.4 KB) -rw-r--r--
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<?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_lang_query_var( $query, $this->curlang );
}
}
/**
* 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 language found in get_language_from_content
* @return object language
*/
public function pll_get_current_language( $lang ) {
return ! $lang ? $this->get_preferred_language() : $lang;
}
}
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