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<?php
/**
* A class to handle the WPML API based on hooks, introduced since WPML 3.2
* It partly relies on the legacy API
*
* @see https://wpml.org/documentation/support/wpml-coding-api/wpml-hooks-reference/
*
* @since 2.0
*/
class PLL_WPML_API {
/**
* Constructor
*
* @since 2.0
*/
public function __construct() {
// Site Wide Language informations
add_filter( 'wpml_active_languages', array( $this, 'wpml_active_languages' ), 10, 2 );
add_filter( 'wpml_display_language_names', array( $this, 'wpml_display_language_names' ), 10, 5 );
// wpml_translated_language_name => not applicable
add_filter( 'wpml_current_language', 'pll_current_language', 10, 0 );
add_filter( 'wpml_default_language', 'pll_default_language', 10, 0 );
// wpml_add_language_selector => not implemented
// wpml_footer_language_selector => not applicable
add_action( 'wpml_add_language_form_field', array( $this, 'wpml_add_language_form_field' ) );
add_filter( 'wpml_language_is_active', array( $this, 'wpml_language_is_active' ), 10, 2 );
add_filter( 'wpml_is_rtl', array( $this, 'wpml_is_rtl' ) );
// wpml_language_form_input_field => See wpml_add_language_form_field
// wpml_language_has_switched => not implemented
// wpml_element_trid => not implemented
// wpml_get_element_translations => not implemented
// wpml_language_switcher => not implemented
// wpml_browser_redirect_language_params => not implemented
// wpml_enqueue_browser_redirect_language => not applicable
// wpml_enqueued_browser_redirect_language => not applicable
// wpml_encode_string => not applicable
// wpml_decode_string => not applicable
// Retrieving Language Information for Content
add_filter( 'wpml_post_language_details', 'wpml_get_language_information', 10, 2 );
// wpml_switch_language => not implemented
add_filter( 'wpml_element_language_code', array( $this, 'wpml_element_language_code' ), 10, 3 );
// wpml_element_language_details => not applicable
// Retrieving Localized Content
add_filter( 'wpml_home_url', 'pll_home_url', 10, 0 );
add_filter( 'wpml_element_link', 'icl_link_to_element', 10, 7 );
add_filter( 'wpml_object_id', 'icl_object_id', 10, 4 );
add_filter( 'wpml_translate_single_string', array( $this, 'wpml_translate_single_string' ), 10, 4 );
// wpml_translate_string => not applicable
// wpml_unfiltered_admin_string => not implemented
add_filter( 'wpml_permalink', array( $this, 'wpml_permalink' ), 10, 2 );
// wpml_elements_without_translations => not implemented
add_filter( 'wpml_get_translated_slug', array( $this, 'wpml_get_translated_slug' ), 10, 3 );
// Finding the Translation State of Content
// wpml_element_translation_type => not implemented
add_filter( 'wpml_element_has_translations', array( $this, 'wpml_element_has_translations' ), 10, 3 );
// wpml_master_post_from_duplicate => not applicable
// wpml_post_duplicates => not applicable
// Inserting Content
// wpml_admin_make_post_duplicates => not applicable
// wpml_make_post_duplicates => not applicable
add_action( 'wpml_register_single_string', 'icl_register_string', 10, 3 );
// wpml_register_string => not applicable
// wpml_register_string_packages => not applicable
// wpml_delete_package_action => not applicable
// wpml_show_package_language_ui => not applicable
// wpml_set_element_language_details => not implemented
// wpml_multilingual_options => not applicable
// Miscellaneous
// wpml_element_type => not applicable
// wpml_setting => not applicable
// wpml_sub_setting => not applicable
// wpml_editor_cf_to_display => not applicable
// wpml_tm_save_translation_cf => not implemented
// wpml_tm_xliff_export_translated_cf => not applicable
// wpml_tm_xliff_export_original_cf => not applicable
// wpml_duplicate_generic_string => not applicable
// wpml_translatable_user_meta_fields => not implemented
// wpml_cross_domain_language_data => not applicable
// wpml_get_cross_domain_language_data => not applicable
// wpml_loaded => not applicable
// wpml_st_loaded => not applicable
// wpml_tm_loaded => not applicable
// wpml_hide_management_column (3.4.1) => not applicable
// wpml_ls_directories_to_scan => not applicable
// wpml_ls_model_css_classes => not applicable
// wpml_ls_model_language_css_classes => not applicable
// wpml_tf_feedback_open_link => not applicable
// wpml_sync_custom_field => not implemented
// wpml_sync_all_custom_fields => not implemented
// wpml_is_redirected => not implemented
// Updating Content
// wpml_set_translation_mode_for_post_type => not implemented
}
/**
* Get a list of the languages enabled for a site
*
* @since 2.0
*
* @param mixed $null Not used
* @param array| string $args See arguments of icl_get_languages()
* @return array Array of arrays per language
*/
public function wpml_active_languages( $null, $args = '' ) {
return icl_get_languages( $args );
}
/**
* In WPML, get a language's native and translated name for display in a custom language switcher
* Since Polylang does not implement the translated name, always returns only the native name
*
* @since 2.2
*
* @param mixed $null Not used.
* @param string $native_name The language native name.
* @param string|bool $translated_name The language translated name. Not used.
* @param bool $native_hidden Whether to hide the language native name or not. Not used.
* @param bool $translated_hidden Whether to hide the language translated name or not. Not used.
* @return string
*/
public function wpml_display_language_names( $null, $native_name, $translated_name = false, $native_hidden = false, $translated_hidden = false ) {
return $native_name;
}
/**
* Returns an HTML hidden input field with name=”lang” and as value the current language
*
* @since 2.0
*/
public function wpml_add_language_form_field() {
$lang = pll_current_language();
$field = sprintf( '<input type="hidden" name="lang" value="%s" />', esc_attr( $lang ) );
$field = apply_filters( 'wpml_language_form_input_field', $field, $lang );
echo $field;
}
/**
* Find out if a specific language is enabled for the site
*
* @since 2.0
*
* @param mixed $null Not used
* @param string $slug Language code
* @return bool
*/
public function wpml_language_is_active( $null, $slug ) {
$language = PLL()->model->get_language( $slug );
return empty( $language->active ) || true === $language->active;
}
/**
* Find out whether the current language text direction is RTL or not
*
* @since 2.0
*
* @param mixed $null Not used
* @return bool
*/
public function wpml_is_rtl( $null ) {
return pll_current_language( 'is_rtl' );
}
/**
* Get the language code for a translatable element
*
* @since 2.0
*
* @param mixed $language_code
* @param array $args An array with two keys element_id => post_id or term_taxonomy_id, element_type => post type or taxonomy
* @return string
*/
public function wpml_element_language_code( $language_code, $args ) {
$type = $args['element_type'];
$id = $args['element_id'];
$pll_type = ( 'post' == $type || pll_is_translated_post_type( $type ) ) ? 'post' : ( 'term' == $type || pll_is_translated_taxonomy( $type ) ? 'term' : false );
if ( 'term' === $pll_type && $term = wpcom_vip_get_term_by( 'term_taxonomy_id', $id ) ) {
$id = $term->term_id;
}
return $pll_type ? call_user_func( "pll_get_{$pll_type}_language", $id ) : $language_code;
}
/**
* Translates a string
*
* @since 2.0
*
* @param string $string The string's original value
* @param string $context The string's registered context
* @param string $name The string's registered name
* @param null|string $lang Optional, return the translation in this language, defaults to current language
* @return string The translated string
*/
public function wpml_translate_single_string( $string, $context, $name, $lang = null ) {
$has_translation = null; // Passed by reference
return icl_translate( $context, $name, $string, false, $has_translation, $lang );
}
/**
* Converts a permalink to a language specific permalink
*
* @since 2.2
*
* @param string $url The url to filter
* @param null|string $lang Langage code, optional, defaults to the current language
* @return string
*/
public function wpml_permalink( $url, $lang = '' ) {
$lang = PLL()->model->get_language( $lang );
if ( empty( $lang ) && ! empty( PLL()->curlang ) ) {
$lang = PLL()->curlang;
}
return empty( $lang ) ? $url : PLL()->links_model->switch_language_in_link( $url, $lang );
}
/**
* Translates a post type slug
*
* @since 2.2
*
* @param string $slug Post type slug
* @param string $post_type Post type name
* @param string $lang Optional language code (defaults to current language)
* @return string
*/
public function wpml_get_translated_slug( $slug, $post_type, $lang = null ) {
if ( isset( PLL()->translate_slugs ) ) {
if ( empty( $lang ) ) {
$lang = pll_current_language();
}
$slug = PLL()->translate_slugs->slugs_model->get_translated_slug( $post_type, $lang );
}
return $slug;
}
/**
* Find out whether a post type or a taxonomy term is translated
*
* @since 2.0
*
* @param mixed $null
* @param int $id The post_id or term_id
* @param string $type The post type or taxonomy
* @return bool
*/
public function wpml_element_has_translations( $null, $id, $type ) {
$pll_type = ( 'post' == $type || pll_is_translated_post_type( $type ) ) ? 'post' : ( 'term' == $type || pll_is_translated_taxonomy( $type ) ? 'term' : false );
return ( $pll_type && $translations = call_user_func( "pll_get_{$pll_type}_translations", $id ) ) ? count( $translations ) > 1 : false;
}
}
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