links = &$polylang->links;
// Removes the editor and the template select dropdown for pages for posts
add_filter( 'use_block_editor_for_post', array( $this, 'use_block_editor_for_post' ), 10, 2 ); // Since WP 5.0
add_action( 'add_meta_boxes', array( $this, 'add_meta_boxes' ), 10, 2 );
// Add post state for translations of the front page and posts page
add_filter( 'display_post_states', array( $this, 'display_post_states' ), 10, 2 );
// Refresh language cache when a static front page has been translated
add_action( 'pll_save_post', array( $this, 'pll_save_post' ), 10, 3 );
// Checks if chosen page on front is translated
add_filter( 'pre_update_option_page_on_front', array( $this, 'update_page_on_front' ), 10, 2 );
add_filter( 'customize_validate_page_on_front', array( $this, 'customize_validate_page_on_front' ), 10, 2 );
// Prevents WP resetting the option
add_filter( 'pre_update_option_show_on_front', array( $this, 'update_show_on_front' ), 10, 2 );
add_action( 'admin_notices', array( $this, 'notice_must_translate' ) );
}
/**
* Don't use the block editor for the translations of the pages for posts
*
* @since 2.5
*
* @param bool $use_block_editor Whether the post can be edited or not.
* @param WP_Post $post The post being checked.
* @return bool
*/
public function use_block_editor_for_post( $use_block_editor, $post ) {
if ( 'page' === $post->post_type ) {
add_filter( 'option_page_for_posts', array( $this, 'translate_page_for_posts' ) );
if ( ( get_option( 'page_for_posts' ) == $post->ID ) && empty( $post->post_content ) ) {
return false;
}
}
return $use_block_editor;
}
/**
* Removes the editor for translations of the pages for posts
* Removes the page template select dropdown in page attributes metabox too
*
* @since 2.2.2
*
* @param string $post_type Current post type
* @param object $post Current post
*/
public function add_meta_boxes( $post_type, $post ) {
if ( 'page' === $post_type ) {
add_filter( 'option_page_for_posts', array( $this, 'translate_page_for_posts' ) );
if ( ( get_option( 'page_for_posts' ) == $post->ID ) && empty( $post->post_content ) ) {
add_action( 'edit_form_after_title', '_wp_posts_page_notice' );
remove_post_type_support( $post_type, 'editor' );
}
}
}
/**
* Add post state for translations of the front page and posts page
*
* @since 1.8
*
* @param array $post_states An array of post display states.
* @param object $post The current post object.
* @return array
*/
public function display_post_states( $post_states, $post ) {
if ( in_array( $post->ID, $this->model->get_languages_list( array( 'fields' => 'page_on_front' ) ) ) ) {
$post_states['page_on_front'] = __( 'Front Page', 'polylang' );
}
if ( in_array( $post->ID, $this->model->get_languages_list( array( 'fields' => 'page_for_posts' ) ) ) ) {
$post_states['page_for_posts'] = __( 'Posts Page', 'polylang' );
}
return $post_states;
}
/**
* Refresh language cache when a static front page has been translated
*
* @since 1.8
*
* @param int $post_id Not used
* @param object $post Not used
* @param array $translations
*/
public function pll_save_post( $post_id, $post, $translations ) {
if ( in_array( $this->page_on_front, $translations ) ) {
$this->model->clean_languages_cache();
}
}
/**
* Checks if a page is translated in all languages
*
* @since 2.2
*
* @param int $page_id
* @return bool
*/
protected function is_page_translated( $page_id ) {
if ( $page_id ) {
$translations = count( $this->model->post->get_translations( $page_id ) );
$languages = count( $this->model->get_languages_list() );
if ( $languages > 1 && $translations != $languages ) {
return false;
}
}
return true;
}
/**
* Prevents choosing an untranslated static front page
* Displays an error message
*
* @since 1.6
*
* @param int $page_id New page on front page id
* @param int $old_id Old page on front page_id
* @return int
*/
public function update_page_on_front( $page_id, $old_id ) {
if ( ! $this->is_page_translated( $page_id ) ) {
$page_id = $old_id;
add_settings_error( 'reading', 'pll_page_on_front_error', __( 'The chosen static front page must be translated in all languages.', 'polylang' ) );
}
return $page_id;
}
/**
* Displays an error message in the customizer when choosing an untranslated static front page
*
* @since 2.2
*
* @param object $validity WP_Error object
* @param int $page_id New page on front page id
* @return object
*/
public function customize_validate_page_on_front( $validity, $page_id ) {
if ( ! $this->is_page_translated( $page_id ) ) {
return new WP_Error( 'pll_page_on_front_error', __( 'The chosen static front page must be translated in all languages.', 'polylang' ) );
}
return $validity;
}
/**
* Prevents WP resetting the option if the admin language filter is active for a language with no pages
*
* @since 1.9.3
*
* @param string $value
* @param string $old_value
* @return string
*/
public function update_show_on_front( $value, $old_value ) {
if ( ! empty( $GLOBALS['pagenow'] ) && 'options-reading.php' === $GLOBALS['pagenow'] && 'posts' === $value && ! get_pages() && get_pages( array( 'lang' => '' ) ) ) {
$value = $old_value;
}
return $value;
}
/**
* Add a notice to translate the static front page if it is not translated in all languages
* This is especially useful after a new language is created.
* The notice is not dismissible and displayed on the Languages pages and the list of pages.
*
* @since 2.6
*/
public function notice_must_translate() {
$screen = get_current_screen();
if ( $this->page_on_front && ( 'toplevel_page_mlang' === $screen->id || 'edit-page' === $screen->id ) ) {
$untranslated = array();
foreach ( $this->model->get_languages_list() as $language ) {
if ( ! $this->model->post->get( $this->page_on_front, $language ) ) {
$untranslated[] = sprintf(
'%s',
esc_url( $this->links->get_new_post_translation_link( $this->page_on_front, $language ) ),
esc_html( $language->name )
);
}
}
if ( ! empty( $untranslated ) ) {
printf(
'',
sprintf(
/* translators: %s is a comma separated list of native language names */
esc_html__( 'You must translate your static front page in %s.', 'polylang' ),
implode( ', ', $untranslated ) // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
)
);
}
}
}
}