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<?php |
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/* |
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Plugin Name: Polylang |
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Plugin URI: http://wordpress.org/extend/plugins/polylang/ |
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Version: 0.3.1 |
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Author: F. Demarle |
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Description: Adds multilingual capability to Wordpress |
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*/ |
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|
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/* Copyright 2011 F. Demarle |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License, version 2, as |
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published by the Free Software Foundation. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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|
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define('POLYLANG_VERSION', '0.3'); |
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define('POLYLANG_DIR', dirname(__FILE__)); |
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require_once(POLYLANG_DIR.'/base.php'); |
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require_once(POLYLANG_DIR.'/admin.php'); |
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require_once(POLYLANG_DIR.'/widget.php'); |
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|
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class Polylang extends Polylang_Base { |
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var $curlang; |
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var $default_locale; |
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var $list_textdomains = array(); |
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var $search_form_filter = false; |
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|
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function __construct() { |
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|
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// manages plugin activation and deactivation |
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register_activation_hook( __FILE__, array(&$this, 'activate') ); |
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register_deactivation_hook( __FILE__, array(&$this, 'deactivate') ); |
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|
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// plugin and widget initialization |
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add_action('init', array(&$this, 'init')); |
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add_action('widgets_init', array(&$this, 'widgets_init')); |
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|
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// rewrite rules |
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add_filter('rewrite_rules_array', array(&$this, 'rewrite_rules_array' )); |
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|
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// filters categories and post tags by language |
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add_filter('terms_clauses', array(&$this, 'terms_clauses'), 10, 3); |
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|
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if (is_admin()) |
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new Polylang_Admin(); |
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else { |
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// text domain management |
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add_filter('locale', array(&$this, 'get_locale')); |
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add_filter('override_load_textdomain', array(&$this, 'mofile'), 10, 3); |
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add_action('wp', array(&$this, 'load_textdomains')); |
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|
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// filters posts according to the language |
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add_filter('pre_get_posts', array(&$this, 'pre_get_posts')); |
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|
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// meta in the html head section |
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remove_action('wp_head', 'rel_canonical'); |
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add_action('wp_head', array(&$this, 'wp_head')); |
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|
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// prevents redirection of the homepage |
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add_filter('redirect_canonical', array(&$this, 'redirect_canonical'), 10, 2); |
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|
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// adds javascript at the end of the document |
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add_action('wp_print_footer_scripts', array(&$this, 'wp_print_footer_scripts')); |
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|
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// adds the language information in the search form |
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add_filter('get_search_form', array(&$this, 'get_search_form')); |
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|
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// filters the pages according to the current language |
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add_filter('get_pages', array(&$this, 'get_pages'), 10, 2); |
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|
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// filters the comments according to the current language |
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add_filter('comments_clauses', array(&$this, 'comments_clauses')); |
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|
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// rewrites feed links to filter them by language |
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add_filter('feed_link', array(&$this, 'feed_link'), 10, 2); |
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|
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// rewrites archives links to filter them by language |
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add_filter('getarchives_join', array(&$this, 'posts_join')); |
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add_filter('getarchives_where', array(&$this, 'posts_where')); |
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add_filter('get_archives_link', array(&$this, 'get_archives_link')); |
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|
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// rewrites next and previous post links to filter them by language |
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add_filter('get_previous_post_join', array(&$this, 'posts_join')); |
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add_filter('get_next_post_join', array(&$this, 'posts_join')); |
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add_filter('get_previous_post_where', array(&$this, 'posts_where')); |
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add_filter('get_next_post_where', array(&$this, 'posts_where')); |
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|
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// filters the nav menus according to the current language |
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add_filter('wp_nav_menu_args', array(&$this, 'wp_nav_menu_args')); |
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|
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// filters the widgets according to the current language |
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add_filter('widget_display_callback', array(&$this, 'widget_display_callback'), 10, 3); |
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|
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// allows a new value for the 'show' parameter to display the homepage url according to the current language |
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add_filter('bloginfo_url', array(&$this, 'bloginfo_url'), 10, 2); |
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|
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// Template tags |
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add_action('the_languages', array(&$this, 'the_languages')); |
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} |
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} |
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|
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// plugin activation |
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function activate() { |
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// create the termmeta table - not provided by WP by default - if it does not already exists |
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// uses exactly the same model as other meta tables to be able to use access functions provided by WP |
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global $wpdb; |
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$charset_collate = ''; |
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if ( ! empty($wpdb->charset) ) |
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$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset"; |
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if ( ! empty($wpdb->collate) ) |
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$charset_collate .= " COLLATE $wpdb->collate"; |
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|
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$table = $wpdb->prefix . 'termmeta'; |
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|
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$tables = $wpdb->get_results("show tables like '$table'"); |
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if (!count($tables)) |
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$wpdb->query("CREATE TABLE $table ( |
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meta_id bigint(20) unsigned NOT NULL auto_increment, |
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term_id bigint(20) unsigned NOT NULL default '0', |
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meta_key varchar(255) default NULL, |
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meta_value longtext, |
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PRIMARY KEY (meta_id), |
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KEY term_id (term_id), |
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KEY meta_key (meta_key) |
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) $charset_collate;"); |
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|
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// codex tells to use the init action to call register_taxonomy but I need it now for my rewrite rules |
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register_taxonomy('language', array('post', 'page'), array('label' => false, 'query_var'=>'lang')); |
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|
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// defines default values for options in case this is the first installation |
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$options = get_option('polylang'); |
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if (!$options) { |
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$options['browser'] = 1; // default language for the front page is set by browser preference |
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$options['rewrite'] = 0; // do not remove /language/ in permalinks |
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} |
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$options['version'] = POLYLANG_VERSION; // do not manage versions yet but prepare for it |
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update_option('polylang', $options); |
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|
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// add our rewrite rules |
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global $wp_rewrite; |
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$wp_rewrite->flush_rules(); |
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} |
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|
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// plugin deactivation |
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function deactivate() { |
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// delete our rewrite rules |
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remove_filter('rewrite_rules_array', array(&$this,'rewrite_rules_array' )); |
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global $wp_rewrite; |
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$wp_rewrite->flush_rules(); |
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} |
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|
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// some initialization |
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function init() { |
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global $wpdb; |
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$wpdb->termmeta = $wpdb->prefix . 'termmeta'; // registers the termmeta table in wpdb |
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|
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// registers the language taxonomy |
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// codex: use the init action to call this function |
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register_taxonomy('language', 'post', array( |
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'label' => false, |
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'query_var'=>'lang', |
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'update_count_callback' => '_update_post_term_count')); |
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|
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// optionaly removes 'language' in permalinks so that we get http://www.myblog/en/ instead of http://www.myblog/language/en/ |
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// the simple line of code is inspired by the WP No Category Base plugin : http://wordpresssupplies.com/wordpress-plugins/no-category-base/ |
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$options = get_option('polylang'); |
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if ($options['rewrite']) { |
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global $wp_rewrite; |
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$wp_rewrite->extra_permastructs['language'][0] = '%language%'; |
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} |
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|
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$this->default_locale = get_locale(); // save the default locale before we start any language manipulation |
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load_plugin_textdomain('polylang', false, dirname(plugin_basename( __FILE__ ))); // plugin i18n |
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} |
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|
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// registers our widget |
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function widgets_init() { |
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register_widget('Polylang_Widget'); |
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} |
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|
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// rewrites rules if pretty permalinks are used |
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function rewrite_rules_array($rules) { |
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$options = get_option('polylang'); |
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$newrules = array(); |
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$listlanguages = $this->get_languages_list(); |
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|
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// modifies the rules created by WordPress when '/language/' is removed in permalinks |
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if ($options['rewrite']) { |
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foreach ($listlanguages as $language) { |
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$newrules[$language->slug.'/feed/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]'; |
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$newrules[$language->slug.'/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]'; |
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$newrules[$language->slug.'/page/?([0-9]{1,})/?$'] = 'index.php?lang='.$language->slug.'&paged=$matches[1]'; |
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$newrules[$language->slug.'/?$'] = 'index.php?lang='.$language->slug; |
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} |
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unset($rules['([^/]+)/feed/(feed|rdf|rss|rss2|atom)/?$']); // => index.php?lang=$matches[1]&feed=$matches[2] |
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unset($rules['([^/]+)/(feed|rdf|rss|rss2|atom)/?$']); // => index.php?lang=$matches[1]&feed=$matches[2] |
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unset($rules['([^/]+)/page/?([0-9]{1,})/?$']); // => index.php?lang=$matches[1]&paged=$matches[2] |
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unset($rules['([^/]+)/?$']); // => index.php?lang=$matches[1] |
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} |
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|
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$options['rewrite'] ? $base = '' : $base = 'language/'; |
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|
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// rewrite rules for comments feed filtered by language |
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foreach ($listlanguages as $language) { |
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$newrules[$base.$language->slug.'/comments/feed/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]&withcomments=1'; |
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$newrules[$base.$language->slug.'/comments/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]&withcomments=1'; |
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} |
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unset($rules['comments/feed/(feed|rdf|rss|rss2|atom)/?$']); // => index.php?&feed=$matches[1]&withcomments=1 |
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unset($rules['comments/(feed|rdf|rss|rss2|atom)/?$']); // => index.php?&feed=$matches[1]&withcomments=1 |
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|
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// rewrite rules for archives filtered by language |
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foreach ($rules as $key => $rule) { |
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$is_archive = strpos($rule, 'year=') && !( |
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strpos($rule, 'p=') || |
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strpos($rule, 'name=') || |
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strpos($rule, 'page=') || |
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strpos($rule, 'cpage=') ); |
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|
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if ($is_archive) { |
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foreach ($listlanguages as $language) |
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$newrules[$base.$language->slug.'/'.$key] = str_replace('?', '?lang='.$language->slug.'&', $rule); |
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|
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unset($rules[$key]); // now useless |
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} |
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} |
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|
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return $newrules + $rules; |
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} |
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|
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// filters categories and post tags by language when needed (both in admin panels and frontend) |
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function terms_clauses($clauses, $taxonomies, $args) { |
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// does nothing except on categories and post tags |
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if ( !in_array('category', $taxonomies) && !in_array('post_tag', $taxonomies) ) |
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return $clauses; |
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|
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if (is_admin()) { |
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$screen = get_current_screen(); //FIXME breaks a user's admin -> use pagenow instead ? Or simply test the function. |
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|
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// NOTE: $screen is not defined in the tag cloud of the Edit Post panel ($pagenow set to admin-ajax.php) |
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if (isset($screen)) |
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// does nothing in the Categories, Post tags, Languages an Posts* admin panels |
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if ($screen->base == 'edit-tags' || $screen->base == 'toplevel_page_mlang' || $screen->base == 'edit') |
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return $clauses; |
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|
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// *FIXME I want all categories in the dropdown list and only the ones in the right language in the inline edit |
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// It seems that I need javascript to get the post_id as inline edit data are manipulated in inline-edit-post.js |
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|
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$this->curlang = $this->get_current_language(); |
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} |
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|
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// adds our clauses to filter by current language |
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if ($this->curlang) { |
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global $wpdb; |
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$clauses['join'] .= " INNER JOIN $wpdb->termmeta AS tm ON t.term_id = tm.term_id"; |
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$clauses['where'] .= $wpdb->prepare(" AND tm.meta_key = '_language' AND tm.meta_value = %d", $this->curlang->term_id); |
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} |
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return $clauses; |
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} |
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|
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// returns the language according to browser preference or the default language |
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function get_preferred_language() { |
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// check first is the user was already browsing this site |
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if (isset($_COOKIE['wordpress_polylang'])) |
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return $this->get_language($_COOKIE['wordpress_polylang']); |
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|
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// sets the browsing language according to the browser preferences |
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// code adapted from http://www.thefutureoftheweb.com/blog/use-accept-language-header |
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$options = get_option('polylang'); |
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if ($options['browser']) { |
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$accept_langs = array(); |
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|
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if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) { |
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// break up string into pieces (languages and q factors) |
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preg_match_all('/([a-z]{1,8}(-[a-z]{1,8})?)\s*(;\s*q\s*=\s*(1|0\.[0-9]+))?/i', $_SERVER['HTTP_ACCEPT_LANGUAGE'], $lang_parse); |
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|
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if (count($lang_parse[1])) { |
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// NOTE: array_combine => PHP5 |
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$accept_langs = array_combine($lang_parse[1], $lang_parse[4]); // create a list like "en" => 0.8 |
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// set default to 1 for any without q factor |
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foreach ($accept_langs as $accept_lang => $val) { |
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if ($val === '') $accept_langs[$accept_lang] = 1; |
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} |
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arsort($accept_langs, SORT_NUMERIC); // sort list based on value |
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} |
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} |
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|
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// looks through sorted list and use first one that matches our language list |
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$listlanguages = $this->get_languages_list(true); // hides languages with no post |
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foreach ($accept_langs as $accept_lang => $val) { |
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foreach ($listlanguages as $language) { |
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if (strpos($accept_lang, $language->slug) === 0 && !isset($pref_lang)) { |
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$pref_lang = $language; |
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} |
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} |
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} |
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} // options['browser'] |
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|
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// either there is no preference in the browser or preferences does not match our language list or it is requested not to use the browser preference |
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if (!isset($pref_lang)) |
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$pref_lang = $this->get_language($options['default_lang']); |
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|
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return $pref_lang; |
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} |
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|
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// returns the current language |
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function get_current_language() { |
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global $post_ID; |
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|
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if($this->curlang) |
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return $this->curlang; |
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|
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if (is_404()) |
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return $this->get_preferred_language(); |
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|
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if (is_admin()) { |
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if (isset($post_ID)) |
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$lang = $this->get_post_language($post_ID); |
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|
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// trick to get the post number in the Post Tags metabox in the Edit Post screen (as $post_ID not defined) |
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$qvars = $this->get_referer_vars(); |
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if (isset($qvars['post'])) |
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$lang = $this->get_post_language($qvars['post']); |
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} |
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else { |
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$var = get_query_var('lang'); |
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if ($var) |
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$lang = $this->get_language($var); |
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else { |
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$var = get_queried_object_id(); |
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if ($var && is_single() || is_page()) |
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$lang = $this->get_post_language($var); |
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else { |
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$var = get_query_var('cat'); |
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if ($var) |
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$lang = $this->get_term_language($var); |
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else { |
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$var = get_query_var('tag_id'); |
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if ($var) |
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$lang = $this->get_term_language($var); |
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} |
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} |
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} |
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} |
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|
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return (isset($lang)) ? $lang : NULL; |
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} |
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|
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// returns the locale based on current language |
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function get_locale($locale) { |
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if ($this->curlang) |
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$locale = $this->curlang->description; |
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return $locale; |
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} |
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|
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// saves all text domains in a table for later usage |
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function mofile( $bool, $domain, $mofile) { |
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$this->list_textdomains[] = array ('mo' => $mofile, 'domain' => $domain); |
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return true; // prevents WP loading text domains as we will load them all later |
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} |
| 370 |
|
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// NOTE: I believe there are two ways for a plugin to force the WP language |
| 372 |
// as done by xili_language and here : load text domains and reinitialize wp_locale with the action 'wp' |
| 373 |
// as done by qtranslate : define the locale with the action 'plugins_loaded', but in this case, the language must be specified in the url. |
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function load_textdomains() { |
| 375 |
// sets the current language and set a cookie to remember it |
| 376 |
if ($this->curlang = $this->get_current_language()) |
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setcookie('wordpress_polylang', $this->curlang->slug, time() + 31536000 /* 1 year */, COOKIEPATH, COOKIE_DOMAIN); |
| 378 |
|
| 379 |
// our override_load_textdomain has done its job. let's remove it before calling load_textdomain |
| 380 |
remove_filter('override_load_textdomain', array(&$this, 'mofile')); |
| 381 |
|
| 382 |
// now we can load text domains with the right language |
| 383 |
$new_locale = get_locale(); |
| 384 |
foreach ($this->list_textdomains as $textdomain) |
| 385 |
load_textdomain( $textdomain['domain'], str_replace($this->default_locale, $new_locale, $textdomain['mo'])); |
| 386 |
|
| 387 |
global $wp_locale; |
| 388 |
$wp_locale->init(); // reinitializes wp_locale for weekdays and months |
| 389 |
} |
| 390 |
|
| 391 |
// filters posts according to the language |
| 392 |
function pre_get_posts($query) { |
| 393 |
|
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if (empty($query->query)) { |
| 395 |
|
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// sets the language according to browser preference or default language |
| 397 |
$this->curlang = $this->get_preferred_language(); |
| 398 |
|
| 399 |
// redirect to the right translated page in case a static page is used as front page |
| 400 |
$post_id = get_option('page_on_front'); |
| 401 |
if (isset($this->curlang) && $post_id) { |
| 402 |
// a static page is used as front page |
| 403 |
|
| 404 |
$language = $this->get_post_language($post_id); |
| 405 |
if ($language->slug != $this->curlang->slug) { |
| 406 |
// but the one defined in the "Reading Settings" panel is not in the right language, so let's redirect to the right one |
| 407 |
$link_id = $this->get_translated_post($post_id, $this->curlang); |
| 408 |
if ($link_id) { |
| 409 |
$url = _get_page_link($link_id); |
| 410 |
wp_redirect($url); |
| 411 |
exit; |
| 412 |
} |
| 413 |
} |
| 414 |
} |
| 415 |
} |
| 416 |
$qvars = $query->query_vars; |
| 417 |
|
| 418 |
// filters recent posts to the current language |
| 419 |
// FIXME if $qvars['post_type'] == 'nav_menu_item', setting lang breaks custom menus. |
| 420 |
// since to get nav_menu_items, get_post is used and no language is linked to nav_menu_items |
| 421 |
if ($query->is_home && $this->curlang && !isset($qvars['post_type'])) |
| 422 |
$query->set('lang', $this->curlang->slug); |
| 423 |
|
| 424 |
// remove pages query when the language is set |
| 425 |
if (isset($qvars['lang']) && $qvars['lang'] && !isset($qvars['post_type'])) |
| 426 |
$query->set('post_type', 'post'); |
| 427 |
} |
| 428 |
|
| 429 |
function wp_head() { |
| 430 |
// modifies the canonical link to the homepage |
| 431 |
if (is_singular()) { |
| 432 |
global $wp_the_query; |
| 433 |
if ($id = $wp_the_query->get_queried_object_id()) { |
| 434 |
if (is_page()) |
| 435 |
$link = _get_page_link($id); // ignores page_on_front unlike get_permalink |
| 436 |
else |
| 437 |
$link = get_permalink ($id); |
| 438 |
echo "<link rel='canonical' href='$link' />\n"; |
| 439 |
} |
| 440 |
} |
| 441 |
|
| 442 |
// outputs references to translated pages (if exists) in the html head section |
| 443 |
// FIXME improve this to make only one db query |
| 444 |
$listlanguages = $this->get_languages_list(); |
| 445 |
foreach ($listlanguages as $language) { |
| 446 |
if ($language->slug != $this->curlang->slug) { |
| 447 |
$url = $this->get_translation_url($language); |
| 448 |
if ($url) |
| 449 |
printf("<link hreflang='%s' href='%s' rel='alternate' />\n", esc_attr($language->slug), $url); |
| 450 |
} |
| 451 |
} |
| 452 |
} |
| 453 |
|
| 454 |
// prevents redirection of the homepage |
| 455 |
function redirect_canonical($redirect_url, $requested_url) { |
| 456 |
if($requested_url == _get_page_link(get_option('page_on_front'))) |
| 457 |
return false; |
| 458 |
return $redirect_url; |
| 459 |
} |
| 460 |
|
| 461 |
// adds some javascript workaround knowing it's not perfect... |
| 462 |
function wp_print_footer_scripts() { |
| 463 |
if ($this->curlang) { |
| 464 |
$js = "<script type='text/javascript'>"; |
| 465 |
|
| 466 |
// modifies links to the homepage to filter by the right language |
| 467 |
// since filtering home_url breaks things in the core and filtering bloginfo_url is not enough if the template uses home_url() |
| 468 |
$url = rtrim(home_url(), '/'); |
| 469 |
|
| 470 |
if ($page = get_option('page_on_front')) |
| 471 |
$newurl = _get_page_link($this->get_post($page, $this->curlang)); |
| 472 |
else |
| 473 |
$newurl = get_term_link($this->curlang->slug, 'language'); |
| 474 |
|
| 475 |
$js .= "var e = document.getElementsByTagName('a'); |
| 476 |
for (var i = 0; i < e.length; i++) { |
| 477 |
var href = e[i].href; |
| 478 |
if (href == '$url' || href == '$url/') { |
| 479 |
e[i].href = '$newurl'; |
| 480 |
} |
| 481 |
}"; |
| 482 |
|
| 483 |
// modifies the search form since filtering get_search_form won't work if the template uses searchform.php |
| 484 |
// don't use directly e[0] just in case there is somewhere else an element named 's' |
| 485 |
// check before if the hidden input has not already been introduced by get_search_form |
| 486 |
if (!$this->search_form_filter) { |
| 487 |
$lang = esc_js($this->curlang->slug); |
| 488 |
$js .= "e = document.getElementsByName('s'); |
| 489 |
for (i = 0; i < e.length; i++) { |
| 490 |
if (e[i] == '[object HTMLInputElement]') { |
| 491 |
var ih = document.createElement('input'); |
| 492 |
ih.type = 'hidden'; |
| 493 |
ih.name = 'lang'; |
| 494 |
ih.value = '$lang'; |
| 495 |
e[i].parentNode.appendChild(ih); |
| 496 |
} |
| 497 |
}"; |
| 498 |
} |
| 499 |
|
| 500 |
$js .= "</script>"; |
| 501 |
echo $js; |
| 502 |
} |
| 503 |
} |
| 504 |
|
| 505 |
// adds the language information in the search form |
| 506 |
// FIXME does not work if searchform.php is used |
| 507 |
function get_search_form($form) { |
| 508 |
if ($form) { |
| 509 |
$this->search_form_filter = true; |
| 510 |
$form = str_replace('</form>', '<input type="hidden" name="lang" value="'.esc_attr($this->curlang->slug).'" /></form>', $form); |
| 511 |
} |
| 512 |
return $form; |
| 513 |
} |
| 514 |
|
| 515 |
// filters the list of pages according to the current language |
| 516 |
// it seems that there is currently no way to filter before the database query (3.2) |
| 517 |
// cannot play with widget_pages_args filter either as it seems that get_pages does not query taxonomies :( |
| 518 |
// so redo the query with get_posts and the 'lang' parameter seems to be be the current best way (rather than trying to manipulate $pages) |
| 519 |
function get_pages($pages, $r) { |
| 520 |
if (isset($this->curlang)) { |
| 521 |
$r['lang'] = $this->curlang->slug; |
| 522 |
$pages = get_posts($r); |
| 523 |
} |
| 524 |
return $pages; |
| 525 |
} |
| 526 |
|
| 527 |
// filters the comments according to the current language |
| 528 |
function comments_clauses($clauses) { |
| 529 |
if ($this->curlang) { |
| 530 |
global $wpdb; |
| 531 |
$clauses['join'] .= " INNER JOIN $wpdb->term_relationships AS tr ON tr.object_id = ID"; |
| 532 |
$clauses['join'] .= " INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id"; |
| 533 |
$clauses['where'] .= $wpdb->prepare(" AND tt.term_id = %d", $this->curlang->term_id); |
| 534 |
} |
| 535 |
return $clauses; |
| 536 |
} |
| 537 |
|
| 538 |
// Modifies the feed link to add the language parameter |
| 539 |
// FIXME should be an option to do this ? |
| 540 |
function feed_link($url, $feed) { |
| 541 |
global $wp_rewrite; |
| 542 |
$options = get_option('polylang'); |
| 543 |
|
| 544 |
if ($this->curlang) { |
| 545 |
if ($wp_rewrite->using_permalinks()) { |
| 546 |
$home = home_url(); |
| 547 |
$options['rewrite'] ? $base = '/' : $base = '/language/'; |
| 548 |
$url = esc_url(str_replace($home, $home.$base.$this->curlang->slug, $url)); |
| 549 |
} |
| 550 |
else { |
| 551 |
if ($feed) |
| 552 |
$url = esc_url(home_url('?lang='.$this->curlang->slug.'&feed='.$feed)); |
| 553 |
} |
| 554 |
} |
| 555 |
return $url; |
| 556 |
} |
| 557 |
|
| 558 |
// modifies the sql request for wp_get_archives an get_adjacent_post to filter by the current language |
| 559 |
function posts_join($sql) { |
| 560 |
if ($this->curlang) { |
| 561 |
global $wpdb; |
| 562 |
$sql .= " INNER JOIN $wpdb->term_relationships ON object_id = ID"; |
| 563 |
} |
| 564 |
return $sql; |
| 565 |
} |
| 566 |
|
| 567 |
// modifies the sql request for wp_get_archives and get_adjacent_post to filter by the current language |
| 568 |
function posts_where($sql) { |
| 569 |
if ($this->curlang) { |
| 570 |
global $wpdb; |
| 571 |
$sql .= $wpdb->prepare(" AND term_taxonomy_id = %d", $this->curlang->term_id); |
| 572 |
} |
| 573 |
return $sql; |
| 574 |
} |
| 575 |
|
| 576 |
// modifies the archives link to add the language parameter |
| 577 |
function get_archives_link($link_html) { |
| 578 |
if ($this->curlang) { |
| 579 |
global $wp_rewrite; |
| 580 |
$options = get_option('polylang'); |
| 581 |
$home = home_url(); |
| 582 |
if ($wp_rewrite->using_permalinks()) { |
| 583 |
$options['rewrite'] ? $base = '/' : $base = '/language/'; |
| 584 |
$link_html = str_replace($home, esc_attr($home.$base.$this->curlang->slug), $link_html); |
| 585 |
} |
| 586 |
else |
| 587 |
$link_html = str_replace($home.'/?', esc_attr($home.'/?lang='.$this->curlang->slug).'&', $link_html); |
| 588 |
} |
| 589 |
return $link_html; |
| 590 |
} |
| 591 |
|
| 592 |
// returns the url of the translation (if exists) of the current page |
| 593 |
function get_translation_url($language) { |
| 594 |
|
| 595 |
if ( is_single()) { |
| 596 |
$id = $this->get_post(get_the_ID(), $language); |
| 597 |
if ($id) |
| 598 |
$url = get_permalink($id); |
| 599 |
} |
| 600 |
|
| 601 |
elseif ( is_page() ) { |
| 602 |
$id = $this->get_post(get_the_ID(), $language); |
| 603 |
if ($id) |
| 604 |
$url = _get_page_link($id); |
| 605 |
} |
| 606 |
|
| 607 |
elseif ( is_category() || is_tag() ) { |
| 608 |
$term = get_queried_object(); |
| 609 |
$term_id = $term->term_id; |
| 610 |
$taxonomy = $term->taxonomy; |
| 611 |
$lang = $this->get_term_language($term_id); |
| 612 |
|
| 613 |
if ($language->slug == $lang->slug) |
| 614 |
$url = get_term_link($term->slug, $taxonomy); // self link |
| 615 |
else { |
| 616 |
$link_id = $this->get_translated_term($term_id, $language); |
| 617 |
if ($link_id) { |
| 618 |
$term = get_term($link_id,$taxonomy); // We need the slug for get_term_link |
| 619 |
$url = get_term_link($term->slug, $taxonomy); |
| 620 |
} |
| 621 |
} |
| 622 |
} |
| 623 |
|
| 624 |
// FIXME for date links, if I simply modify the lang query, there is a risk that there is no posts (if all are not translated at this date) |
| 625 |
// do nothing for now |
| 626 |
elseif ( is_year() ) { |
| 627 |
} |
| 628 |
|
| 629 |
elseif ( is_month() ) { |
| 630 |
} |
| 631 |
|
| 632 |
elseif (is_home() || is_tax('language') ) |
| 633 |
$url = get_term_link($language->slug, 'language'); |
| 634 |
|
| 635 |
return isset($url) ? $url : null; |
| 636 |
} |
| 637 |
|
| 638 |
// filters the nav menus according to the current language |
| 639 |
function wp_nav_menu_args($args) { |
| 640 |
if (!$args['menu'] && $args['theme_location'] && $this->curlang) { |
| 641 |
$menu_lang = get_option('polylang_nav_menus'); |
| 642 |
$args['menu'] = $menu_lang[$args['theme_location']][$this->curlang->slug]; |
| 643 |
} |
| 644 |
return $args; |
| 645 |
} |
| 646 |
|
| 647 |
// filters the widgets according to the current language |
| 648 |
function widget_display_callback($instance, $widget, $args) { |
| 649 |
$widget_lang = get_option('polylang_widgets'); |
| 650 |
// don't display if a language filter is set and this is not the current one |
| 651 |
if (isset($this->curlang) && isset($widget_lang[$widget->id]) && $widget_lang[$widget->id] && $widget_lang[$widget->id] != $this->curlang->slug) |
| 652 |
return false; |
| 653 |
|
| 654 |
return $instance; |
| 655 |
} |
| 656 |
|
| 657 |
// returns the home url in the right language |
| 658 |
function get_home_url($language) { |
| 659 |
$post_id = get_option('page_on_front'); |
| 660 |
if ($post_id) { |
| 661 |
// a static page is used as front page |
| 662 |
$id = $this->get_post($post_id, $language); |
| 663 |
if($id) |
| 664 |
$url = _get_page_link($id); |
| 665 |
} |
| 666 |
return isset($url) ? $url : get_term_link($language->slug, 'language'); |
| 667 |
} |
| 668 |
|
| 669 |
// adds 'lang_url' as possible value to the 'show' parameter of bloginfo to display the home url in the correct language |
| 670 |
// FIXME not tested |
| 671 |
function bloginfo_url($output, $show) { |
| 672 |
if ($show == 'lang_url' && $this->curlang) { |
| 673 |
$url = $this->get_home_url($this->curlang); |
| 674 |
$output = isset($url) ? $url : home_url('/'); |
| 675 |
} |
| 676 |
return $output; |
| 677 |
} |
| 678 |
|
| 679 |
// Template tag : Displays links to the current page in other languages |
| 680 |
// Usage : do_action('the_languages'); |
| 681 |
function the_languages() { |
| 682 |
$listlanguages = $this->get_languages_list(true); // hides languages with no posts |
| 683 |
$output = "<ul>\n"; |
| 684 |
foreach ($listlanguages as $language) { |
| 685 |
$url = $this->get_translation_url($language); |
| 686 |
if (!isset($url)) |
| 687 |
$url = $this->get_home_url($language); // if the page is not translated, link to the home page |
| 688 |
$output .= "<li><a href='$url'>".esc_attr($language->name)."</a></li>\n"; |
| 689 |
} |
| 690 |
$output .= "</ul>\n"; |
| 691 |
echo $output; |
| 692 |
} |
| 693 |
|
| 694 |
} // class Polylang |
| 695 |
|
| 696 |
if (class_exists("Polylang")) |
| 697 |
new Polylang(); |
| 698 |
|
| 699 |
?> |
| 700 |
|
