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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: 0.4.4 |
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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', '0.4.4'); |
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|
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define('POLYLANG_DIR', dirname(__FILE__)); |
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define('INC_DIR', POLYLANG_DIR.'/include'); |
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|
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require_once(INC_DIR.'/base.php'); |
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require_once(INC_DIR.'/admin.php'); |
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require_once(INC_DIR.'/widget.php'); |
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|
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class Polylang extends Polylang_Base { |
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var $curlang; // current language |
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var $default_locale; |
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var $list_textdomains = array(); // all text domains |
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var $search_form_filter = false; // did we pass our get_search_form filter ? |
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|
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function __construct() { |
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// manages plugin activation and deactivation |
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register_activation_hook( __FILE__, array(&$this, 'activate') ); |
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register_deactivation_hook( __FILE__, array(&$this, 'deactivate') ); |
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|
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// manages plugin upgrade |
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add_filter('upgrader_pre_install', array(&$this, 'pre_upgrade')); |
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add_filter('upgrader_post_install', array(&$this, 'post_upgrade')); |
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|
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// plugin and widget initialization |
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add_action('init', array(&$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(&$this, 'get_search_form')); |
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|
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// filters the pages according to the current language in wp_list_pages |
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add_filter('wp_list_pages_excludes', array(&$this, 'wp_list_pages_excludes')); |
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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(&$this, 'comments_clauses'), 10, 2); |
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|
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// rewrites feed links to filter them by language |
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add_filter('feed_link', array(&$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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|
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// rewrites author and date links to filter them by language |
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add_filter('author_link', array(&$this, 'archive_link')); |
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add_filter('year_link', array(&$this, 'archive_link')); |
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add_filter('month_link', array(&$this, 'archive_link')); |
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add_filter('day_link', array(&$this, 'archive_link')); |
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|
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// modifies the calendar to filter posts by language |
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add_filter('get_calendar', array(&$this, 'get_calendar')); |
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|
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// rewrites next and previous post links to filter them by language |
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add_filter('get_previous_post_join', array(&$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(&$this, 'widget_display_callback'), 10, 3); |
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|
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// modifies the home url |
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add_filter('home_url', array(&$this, 'home_url')); |
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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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) $charset_collate;"); |
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|
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// codex tells to use the init action to call register_taxonomy but I need it now for my rewrite rules |
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register_taxonomy('language', get_post_types(array('show_ui' => true)), array('label' => false, 'query_var'=>'lang')); |
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|
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// defines default values for options in case this is the first installation |
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$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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$options['rewrite'] = 0; // do not remove /language/ in permalinks |
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$options['hide_default'] = 0; // do not remove URL language information for default language |
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} |
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$options['version'] = POLYLANG_VERSION; |
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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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// saves the local_flags directory before upgrade |
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function pre_upgrade() { |
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// nothing to backup |
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if (!@is_dir($flags_dir = POLYLANG_DIR . '/local_flags')) |
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return true; |
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|
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$upgrade_dirs = array( |
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WP_CONTENT_DIR . '/upgrade', |
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WP_CONTENT_DIR . '/upgrade/polylang' |
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); |
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|
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foreach ($upgrade_dirs as $dir) { |
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if (!@is_dir($dir) && !@mkdir($dir, 0755)) |
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return new WP_Error('polylang_upgrade_error', sprintf('%s<br />%s <strong>%s</strong>', |
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__("Error: Upgrade directory doesn't exist!", 'polylang'), |
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__('Please create', 'polylang'), |
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esc_attr($dir) |
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)); |
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} |
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|
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if (!@rename($flags_dir, WP_CONTENT_DIR . '/upgrade/polylang/local_flags')) |
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return new WP_Error('polylang_backup_error', sprintf('%s<br />%s <strong>%s</strong>', |
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__('Error: Backup of local flags failed!', 'polylang'), |
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__('Please backup', 'polylang'), |
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esc_attr($flags_dir) |
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)); |
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|
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return true; |
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} |
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|
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// restores the local_flags directory after upgrade |
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function post_upgrade() { |
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// nothing to restore |
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if (!@is_dir($upgrade_dir = WP_CONTENT_DIR . '/upgrade/polylang/local_flags')) |
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return true; |
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|
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if (!@rename($upgrade_dir, POLYLANG_DIR . '/local_flags')) |
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return new WP_Error('polylang_restore_error', sprintf('%s<br />%s (<strong>%s</strong>)', |
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__('Error: Restore of local flags failed!', 'polylang'), |
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__('Please restore your local flags', 'polylang'), |
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esc_attr($upgrade_dir) |
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)); |
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|
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@rmdir(WP_CONTENT_DIR . '/upgrade/polylang'); |
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return true; |
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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', get_post_types(array('show_ui' => true)), array( |
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'label' => false, |
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'public' => false, // avoid displaying the 'like post tags text box' in the quick edit |
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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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global $wp_rewrite; |
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$options = get_option('polylang'); |
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if ($options['rewrite'] && $wp_rewrite->extra_permastructs) |
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$wp_rewrite->extra_permastructs['language'][0] = '%language%'; |
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|
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$this->default_locale = get_locale(); // save the default locale before we start any language manipulation |
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load_plugin_textdomain('polylang', false, basename(POLYLANG_DIR).'/languages'); // plugin i18n |
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} |
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|
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// registers our widget |
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function widgets_init() { |
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register_widget('Polylang_Widget'); |
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} |
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|
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// rewrites rules if pretty permalinks are used |
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function rewrite_rules_array($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 $language) { |
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$slug = $options['default_lang'] == $language->slug && $options['hide_default'] ? '' : $language->slug . '/'; |
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$newrules[$slug.'feed/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]'; |
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$newrules[$slug.'(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]'; |
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$newrules[$slug.'page/?([0-9]{1,})/?$'] = 'index.php?lang='.$language->slug.'&paged=$matches[1]'; |
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if ($slug) |
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$newrules[$slug.'?$'] = '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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$base = $options['rewrite'] ? '' : 'language/'; |
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|
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// rewrite rules for comments feed filtered by language |
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foreach ($listlanguages as $language) { |
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$slug = $options['default_lang'] == $language->slug && $options['hide_default'] ? '' : $base.$language->slug . '/'; |
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$newrules[$slug.'comments/feed/(feed|rdf|rss|rss2|atom)/?$'] = 'index.php?lang='.$language->slug.'&feed=$matches[1]&withcomments=1'; |
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$newrules[$slug.'comments/(feed|rdf|rss|rss2|atom)/?$'] = '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($rule, 'author_name=') || strpos($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 $language) { |
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$slug = $options['default_lang'] == $language->slug && $options['hide_default'] ? '' : $base.$language->slug . '/'; |
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$newrules[$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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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, $args) { |
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// does nothing except on taxonomies which have show_ui set to 1 (includes category and post_tags) |
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foreach ($taxonomies as $tax) { |
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if(!get_taxonomy($tax)->show_ui) |
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return $clauses; |
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} |
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|
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if (is_admin()) { |
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|
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if (function_exists('get_current_screen')) |
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$screen = get_current_screen(); // since WP 3.1, may not be available the first time(s) get_terms is called |
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|
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// does nothing in the Categories, Post tags, Languages and Posts* admin panels |
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if (!isset($screen) || $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 = $language; |
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} |
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} |
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} |
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} // options['browser'] |
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|
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// either there is no preference in the browser or preferences does not match our language list or it is requested not to use the browser preference |
| 379 |
if (!isset($pref_lang)) |
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$pref_lang = $this->get_language($options['default_lang']); |
| 381 |
|
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return $pref_lang; |
| 383 |
} |
| 384 |
|
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// returns the current language |
| 386 |
function get_current_language() { |
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global $post_ID; |
| 388 |
|
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if($this->curlang) |
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return $this->curlang; |
| 391 |
|
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// no language set for 404 and attachment |
| 393 |
if (is_404() || is_attachment()) |
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return $this->get_preferred_language(); |
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|
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|
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if (is_admin()) { |
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if (isset($post_ID)) |
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$lang = $this->get_post_language($post_ID); |
| 400 |
|
| 401 |
if (isset($_POST['action']) && $_POST['action'] == 'get-tagcloud') { |
| 402 |
// to get the language in the Post Tags metabox in the Edit Post screen (as $post_ID not defined) |
| 403 |
$qvars = $this->get_referer_vars(); |
| 404 |
if (isset($qvars['new_lang'])) |
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$lang= $this->get_language($qvars['new_lang']); // post has been created with 'add new' (translation) |
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elseif (isset($qvars['post'])) |
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$lang = $this->get_post_language($qvars['post']); // edit post |
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} |
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|
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// the post is created with the 'add new' (translation) link |
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if (isset($_GET['new_lang'])) |
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$lang = $this->get_language($_GET['new_lang']); |
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} |
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elseif ($var = get_query_var('lang')) |
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$lang = $this->get_language($var); |
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|
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elseif (is_single() || is_page() && $var = get_queried_object_id()) |
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$lang = $this->get_post_language($var); |
| 419 |
|
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else { |
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foreach (get_taxonomies(array('show_ui'=>true)) as $taxonomy) { |
| 422 |
if ($var = get_query_var(get_taxonomy($taxonomy)->query_var)) |
| 423 |
$lang = $this->get_term_language($var, $taxonomy); |
| 424 |
} |
| 425 |
} |
| 426 |
|
| 427 |
return (isset($lang)) ? $lang : NULL; |
| 428 |
} |
| 429 |
|
| 430 |
// returns the locale based on current language |
| 431 |
function get_locale($locale) { |
| 432 |
if ($this->curlang) |
| 433 |
$locale = $this->curlang->description; |
| 434 |
return $locale; |
| 435 |
} |
| 436 |
|
| 437 |
// saves all text domains in a table for later usage |
| 438 |
function mofile($bool, $domain, $mofile) { |
| 439 |
$this->list_textdomains[] = array ('mo' => $mofile, 'domain' => $domain); |
| 440 |
return true; // prevents WP loading text domains as we will load them all later |
| 441 |
} |
| 442 |
|
| 443 |
// NOTE: I believe there are two ways for a plugin to force the WP language |
| 444 |
// as done by xili_language and here: load text domains and reinitialize wp_locale with the action 'wp' |
| 445 |
// as done by qtranslate: define the locale with the action 'plugins_loaded', but in this case, the language must be specified in the url. |
| 446 |
function load_textdomains() { |
| 447 |
// sets the current language and set a cookie to remember it |
| 448 |
if ($this->curlang = $this->get_current_language()) |
| 449 |
setcookie('wordpress_polylang', $this->curlang->slug, time() + 31536000 /* 1 year */, COOKIEPATH, COOKIE_DOMAIN); |
| 450 |
|
| 451 |
// our override_load_textdomain filter has done its job. let's remove it before calling load_textdomain |
| 452 |
remove_filter('override_load_textdomain', array(&$this, 'mofile')); |
| 453 |
|
| 454 |
// now we can load text domains with the right language |
| 455 |
$new_locale = get_locale(); |
| 456 |
foreach ($this->list_textdomains as $textdomain) |
| 457 |
load_textdomain( $textdomain['domain'], str_replace($this->default_locale, $new_locale, $textdomain['mo'])); |
| 458 |
|
| 459 |
global $wp_locale; |
| 460 |
$wp_locale->init(); // reinitializes wp_locale for weekdays and months |
| 461 |
} |
| 462 |
|
| 463 |
// filters posts according to the language |
| 464 |
function pre_get_posts($query) { |
| 465 |
$options = get_option('polylang'); |
| 466 |
$qvars = $query->query_vars; |
| 467 |
|
| 468 |
// detect our exclude pages query and returns to avoid conflicts |
| 469 |
// this test should be sufficient |
| 470 |
if (isset($qvars['tax_query'][0]) && isset($qvars['tax_query'][0]['taxonomy']) && isset($qvars['tax_query'][0]['operator'])) |
| 471 |
return; |
| 472 |
|
| 473 |
if (empty($query->query)) { |
| 474 |
if ( $options['hide_default'] && isset($_COOKIE['wordpress_polylang']) ) |
| 475 |
$this->curlang = $this->get_language($options['default_lang']); |
| 476 |
else |
| 477 |
$this->curlang = $this->get_preferred_language(); // sets the language according to browser preference or default language |
| 478 |
|
| 479 |
if ($options['default_lang'] == $this->curlang->slug && $options['hide_default']) { |
| 480 |
if (($post_id = get_option('page_on_front')) && $link_id = $this->get_post($post_id, $this->curlang)) |
| 481 |
$query->set('page_id', $link_id); |
| 482 |
else |
| 483 |
$query->set('lang', $this->curlang->slug); |
| 484 |
} |
| 485 |
else { |
| 486 |
if (($post_id = get_option('page_on_front')) && $link_id = $this->get_post($post_id, $this->curlang)) |
| 487 |
$url = _get_page_link($link_id); |
| 488 |
else |
| 489 |
$url = home_url('?lang='.$this->curlang->slug); |
| 490 |
|
| 491 |
wp_redirect($url); |
| 492 |
exit; |
| 493 |
} |
| 494 |
} |
| 495 |
|
| 496 |
// sets the language for posts page in case the front page displays a static page |
| 497 |
if (($page_for_posts = get_option('page_for_posts')) && |
| 498 |
isset($query->queried_object_id) && |
| 499 |
$this->get_post($query->queried_object_id, $this->get_post_language($page_for_posts)) == $page_for_posts |
| 500 |
) { |
| 501 |
$query->set('lang',$this->get_post_language($query->queried_object_id)->slug); |
| 502 |
$query->queried_object_id = get_option('page_for_posts'); |
| 503 |
$query->is_page = false; |
| 504 |
$query->is_home = true; |
| 505 |
$query->is_posts_page = true; |
| 506 |
$query->is_singular = false; |
| 507 |
} |
| 508 |
|
| 509 |
// FIXME to generalize as I probably forget things |
| 510 |
// sets the language in case we hide the default language |
| 511 |
if ( $options['hide_default'] && !isset($qvars['lang']) && ( |
| 512 |
(count($query->query) == 1 && isset($qvars['paged']) && $qvars['paged']) || |
| 513 |
isset($qvars['m']) && $qvars['m'] || |
| 514 |
isset($qvars['feed']) && $qvars['feed'] || |
| 515 |
isset($qvars['author']) && $qvars['author'])) |
| 516 |
$query->set('lang', $options['default_lang']); |
| 517 |
|
| 518 |
// filters recent posts to the current language |
| 519 |
// FIXME if $qvars['post_type'] == 'nav_menu_item', setting lang breaks custom menus. |
| 520 |
// since to get nav_menu_items, get_post is used and no language is linked to nav_menu_items |
| 521 |
if ($query->is_home && $this->curlang && !isset($qvars['post_type'])) |
| 522 |
$query->set('lang', $this->curlang->slug); |
| 523 |
|
| 524 |
// remove pages query when the language is set unless we do a search |
| 525 |
// FIXME is only search broken by this ? |
| 526 |
if (isset($qvars['lang']) && $qvars['lang'] && !isset($qvars['post_type']) && !is_search()) |
| 527 |
$query->set('post_type', 'post'); |
| 528 |
|
| 529 |
// unset the is_archive flag for language pages to prevent loading the archive template |
| 530 |
// keep archive flag for comment feed otherwise the language filter does not work |
| 531 |
if (isset($qvars['lang']) && $qvars['lang'] && !is_post_type_archive() && !is_date() && !is_author() && !is_category() && !is_tag() && !is_comment_feed()) |
| 532 |
$query->is_archive = false; |
| 533 |
|
| 534 |
// unset the is_tax flag for authors pages |
| 535 |
// FIXME Probably I should do this for other cases |
| 536 |
if (isset($qvars['lang']) && $qvars['lang'] && is_author()) |
| 537 |
$query->is_tax = false; |
| 538 |
} |
| 539 |
|
| 540 |
function wp_head() { |
| 541 |
// modifies the canonical link to the homepage |
| 542 |
if (is_singular()) { |
| 543 |
global $wp_the_query; |
| 544 |
if ($id = $wp_the_query->get_queried_object_id()) { |
| 545 |
if (is_page()) |
| 546 |
$link = _get_page_link($id); // ignores page_on_front unlike get_permalink |
| 547 |
else |
| 548 |
$link = get_permalink ($id); |
| 549 |
echo "<link rel='canonical' href='$link' />\n"; |
| 550 |
} |
| 551 |
} |
| 552 |
|
| 553 |
// outputs references to translated pages (if exists) in the html head section |
| 554 |
foreach ($this->get_languages_list() as $language) { |
| 555 |
if ($language->slug != $this->curlang->slug && $url = $this->get_translation_url($language)) |
| 556 |
printf("<link hreflang='%s' href='%s' rel='alternate' />\n", esc_attr($language->slug), esc_url($url)); |
| 557 |
} |
| 558 |
} |
| 559 |
|
| 560 |
// prevents redirection of the homepage |
| 561 |
function redirect_canonical($redirect_url, $requested_url) { |
| 562 |
if($requested_url == _get_page_link(get_option('page_on_front'))) |
| 563 |
return false; |
| 564 |
return $redirect_url; |
| 565 |
} |
| 566 |
|
| 567 |
// adds some javascript workaround knowing it's not perfect... |
| 568 |
function wp_print_footer_scripts() { |
| 569 |
if ($this->curlang) { |
| 570 |
$js = ''; |
| 571 |
|
| 572 |
// modifies the search form since filtering get_search_form won't work if the template uses searchform.php |
| 573 |
// don't use directly e[0] just in case there is somewhere else an element named 's' |
| 574 |
// check before if the hidden input has not already been introduced by get_search_form |
| 575 |
if (!$this->search_form_filter) { |
| 576 |
$lang = esc_js($this->curlang->slug); |
| 577 |
$js .= "e = document.getElementsByName('s'); |
| 578 |
for (i = 0; i < e.length; i++) { |
| 579 |
if (e[i] == '[object HTMLInputElement]') { |
| 580 |
var ih = document.createElement('input'); |
| 581 |
ih.type = 'hidden'; |
| 582 |
ih.name = 'lang'; |
| 583 |
ih.value = '$lang'; |
| 584 |
e[i].parentNode.appendChild(ih); |
| 585 |
} |
| 586 |
}"; |
| 587 |
} |
| 588 |
|
| 589 |
if ($js) |
| 590 |
echo "<script type='text/javascript'>" .$js. "</script>"; |
| 591 |
} |
| 592 |
} |
| 593 |
|
| 594 |
// adds the language information in the search form |
| 595 |
// does not work if searchform.php is used |
| 596 |
function get_search_form($form) { |
| 597 |
if ($form) { |
| 598 |
$this->search_form_filter = true; |
| 599 |
$form = str_replace('</form>', '<input type="hidden" name="lang" value="'.esc_attr($this->curlang->slug).'" /></form>', $form); |
| 600 |
} |
| 601 |
return $form; |
| 602 |
} |
| 603 |
|
| 604 |
// excludes pages which are not in the current language for wp_list_pages |
| 605 |
// useful for the pages widget |
| 606 |
function wp_list_pages_excludes($pages) { |
| 607 |
if (isset($this->curlang)) { |
| 608 |
$q = array( |
| 609 |
'numberposts'=>-1, |
| 610 |
'post_type' => 'page', |
| 611 |
'fields' => 'ids', |
| 612 |
'tax_query' => array(array( |
| 613 |
'taxonomy'=>'language', |
| 614 |
'fields' => 'id', |
| 615 |
'terms'=>$this->curlang->term_id, |
| 616 |
'operator'=>'NOT IN' |
| 617 |
)) |
| 618 |
); |
| 619 |
$pages = array_merge($pages, get_posts($q)); |
| 620 |
} |
| 621 |
return $pages; |
| 622 |
} |
| 623 |
|
| 624 |
// filters the comments according to the current language mainly for the recent comments widget |
| 625 |
function comments_clauses($clauses, $comment_query) { |
| 626 |
// first test if wp_posts.ID already available in the query |
| 627 |
if ($this->curlang && strpos($clauses['join'], '.ID')) { |
| 628 |
global $wpdb; |
| 629 |
$clauses['join'] .= " INNER JOIN $wpdb->term_relationships AS tr ON tr.object_id = ID"; |
| 630 |
$clauses['join'] .= " INNER JOIN $wpdb->term_taxonomy AS tt ON tr.term_taxonomy_id = tt.term_taxonomy_id"; |
| 631 |
$clauses['where'] .= $wpdb->prepare(" AND tt.term_id = %d", $this->curlang->term_id); |
| 632 |
} |
| 633 |
return $clauses; |
| 634 |
} |
| 635 |
|
| 636 |
// Modifies the feed link to add the language parameter |
| 637 |
function feed_link($url, $feed) { |
| 638 |
global $wp_rewrite; |
| 639 |
$options = get_option('polylang'); |
| 640 |
|
| 641 |
if ($this->curlang) { |
| 642 |
if ($wp_rewrite->using_permalinks()) { |
| 643 |
$home = get_option('home'); |
| 644 |
$base = $options['rewrite'] ? '/' : '/language/'; |
| 645 |
$slug = $options['default_lang'] == $this->curlang->slug && $options['hide_default'] ? '' : $base.$this->curlang->slug; |
| 646 |
$url = esc_url(str_replace($home, $home.$slug, $url)); |
| 647 |
} |
| 648 |
elseif ($feed) |
| 649 |
$url = esc_url(home_url('?lang='.$this->curlang->slug.'&feed='.$feed)); |
| 650 |
|
| 651 |
} |
| 652 |
return $url; |
| 653 |
} |
| 654 |
|
| 655 |
// modifies the sql request for wp_get_archives an get_adjacent_post to filter by the current language |
| 656 |
function posts_join($sql) { |
| 657 |
if ($this->curlang) { |
| 658 |
global $wpdb; |
| 659 |
$sql .= " INNER JOIN $wpdb->term_relationships ON object_id = ID"; |
| 660 |
} |
| 661 |
return $sql; |
| 662 |
} |
| 663 |
|
| 664 |
// modifies the sql request for wp_get_archives and get_adjacent_post to filter by the current language |
| 665 |
function posts_where($sql) { |
| 666 |
if ($this->curlang) { |
| 667 |
global $wpdb; |
| 668 |
$sql .= $wpdb->prepare(" AND term_taxonomy_id = %d", $this->curlang->term_id); |
| 669 |
} |
| 670 |
return $sql; |
| 671 |
} |
| 672 |
|
| 673 |
// modifies the author and date links to add the language parameter |
| 674 |
function archive_link($link) { |
| 675 |
if ($this->curlang) { |
| 676 |
global $wp_rewrite; |
| 677 |
$options = get_option('polylang'); |
| 678 |
$home = get_option('home'); |
| 679 |
|
| 680 |
if ($wp_rewrite->using_permalinks()) { |
| 681 |
$base = $options['rewrite'] ? '/' : '/language/'; |
| 682 |
$slug = $options['default_lang'] == $this->curlang->slug && $options['hide_default'] ? '' : $base.$this->curlang->slug; |
| 683 |
$link = esc_url(str_replace($home, $home.$slug, $link)); |
| 684 |
} |
| 685 |
else |
| 686 |
$link = esc_url(str_replace($home.'/?', $home.'/?lang='.$this->curlang->slug.'&', $link)); |
| 687 |
} |
| 688 |
return $link; |
| 689 |
} |
| 690 |
|
| 691 |
// modifies the calendar to filter posts by language |
| 692 |
function get_calendar() { |
| 693 |
require_once(INC_DIR.'/calendar.php'); |
| 694 |
return $calendar_output; |
| 695 |
} |
| 696 |
|
| 697 |
// returns the url of the translation (if exists) of the current page |
| 698 |
function get_translation_url($language) { |
| 699 |
global $wp_query, $wp_rewrite; |
| 700 |
$qvars = $wp_query->query; |
| 701 |
$options = get_option('polylang'); |
| 702 |
$hide = $options['default_lang'] == $language->slug && $options['hide_default']; |
| 703 |
|
| 704 |
// is_single is set to 1 for attachment but no language is set |
| 705 |
if (is_single() && !is_attachment() && $id = $this->get_post(get_the_ID(), $language)) |
| 706 |
$url = get_permalink($id); |
| 707 |
|
| 708 |
// page for posts |
| 709 |
elseif (isset($wp_query->queried_object_id) && $wp_query->queried_object_id == ($page_for_posts = get_option('page_for_posts'))) |
| 710 |
$url = get_permalink($this->get_post($page_for_posts, $language)); |
| 711 |
|
| 712 |
elseif (is_page() && $id = $this->get_post(get_the_ID(), $language)) |
| 713 |
$url = $hide && $id == $this->get_post(get_option('page_on_front'), $language) ? |
| 714 |
get_option('home') : |
| 715 |
_get_page_link($id); |
| 716 |
|
| 717 |
elseif ( !is_tax ('language') && (is_category() || is_tag() || is_tax () ) ) { |
| 718 |
$term = get_queried_object(); |
| 719 |
$lang = $this->get_term_language($term->term_id); |
| 720 |
$taxonomy = $term->taxonomy; |
| 721 |
|
| 722 |
if ($language->slug == $lang->slug) |
| 723 |
$url = get_term_link($term, $taxonomy); // self link |
| 724 |
elseif ($link_id = $this->get_translated_term($term->term_id, $language)) |
| 725 |
$url = get_term_link(get_term($link_id, $taxonomy), $taxonomy); |
| 726 |
} |
| 727 |
|
| 728 |
// don't test if there are existing translations before creating the url as it would be very expensive in sql queries |
| 729 |
elseif(is_archive()) { |
| 730 |
if ($wp_rewrite->using_permalinks()) { |
| 731 |
$base = $options['rewrite'] ? '/' : '/language/'; |
| 732 |
$base = $hide ? '' : $base.$language->slug; |
| 733 |
$base = get_option('home').$base.'/'; |
| 734 |
|
| 735 |
if (is_author()) |
| 736 |
$url = esc_url($base.'author/'.$qvars['author_name'].'/'); |
| 737 |
|
| 738 |
if (is_year()) |
| 739 |
$url = esc_url($base.$qvars['year'].'/'); |
| 740 |
|
| 741 |
if (is_month()) |
| 742 |
$url = esc_url($base.$qvars['year'].'/'.$qvars['monthnum'].'/'); |
| 743 |
|
| 744 |
if (is_day()) |
| 745 |
$url = esc_url($base.$qvars['year'].'/'.$qvars['monthnum'].'/'.$qvars['day'].'/'); |
| 746 |
} |
| 747 |
else |
| 748 |
$url = $hide ? remove_query_arg('lang') : add_query_arg('lang', $language->slug); |
| 749 |
} |
| 750 |
|
| 751 |
elseif (is_home() || is_tax('language') ) |
| 752 |
$url = $hide ? get_option('home') : get_term_link($language, 'language'); |
| 753 |
|
| 754 |
return isset($url) ? $url : null; |
| 755 |
} |
| 756 |
|
| 757 |
// filters the nav menus according to the current language |
| 758 |
function wp_nav_menu_args($args) { |
| 759 |
if (!$args['menu'] && $args['theme_location'] && $this->curlang) { |
| 760 |
$menu_lang = get_option('polylang_nav_menus'); |
| 761 |
$args['menu'] = $menu_lang[$args['theme_location']][$this->curlang->slug]; |
| 762 |
} |
| 763 |
return $args; |
| 764 |
} |
| 765 |
|
| 766 |
// filters the widgets according to the current language |
| 767 |
function widget_display_callback($instance, $widget, $args) { |
| 768 |
$widget_lang = get_option('polylang_widgets'); |
| 769 |
// don't display if a language filter is set and this is not the current one |
| 770 |
if (isset($this->curlang) && isset($widget_lang[$widget->id]) && $widget_lang[$widget->id] && $widget_lang[$widget->id] != $this->curlang->slug) |
| 771 |
return false; |
| 772 |
|
| 773 |
return $instance; |
| 774 |
} |
| 775 |
|
| 776 |
// filters the home url to get the right language |
| 777 |
function home_url($url) { |
| 778 |
if ( !(did_action('template_redirect') && rtrim($url,'/') == rtrim(get_option('home'),'/') && $this->curlang) ) |
| 779 |
return $url; |
| 780 |
|
| 781 |
// don't like this but at least for WP_Widget_Categories::widget, it seems to be the only solution |
| 782 |
// FIXME are there other exceptions ? |
| 783 |
foreach (debug_backtrace() as $trace) { |
| 784 |
$exceptions = $trace['function'] == 'get_pagenum_link' || |
| 785 |
$trace['function'] == 'get_author_posts_url' || |
| 786 |
($trace['function'] == 'widget' && $trace['class'] == 'WP_Widget_Categories'); |
| 787 |
if ($exceptions) |
| 788 |
return $url; |
| 789 |
} |
| 790 |
|
| 791 |
return $this->get_home_url($this->curlang); |
| 792 |
} |
| 793 |
|
| 794 |
// returns the home url in the right language |
| 795 |
function get_home_url($language) { |
| 796 |
$options = get_option('polylang'); |
| 797 |
if ($options['default_lang'] == $language->slug && $options['hide_default']) |
| 798 |
return trailingslashit(get_option('home')); |
| 799 |
|
| 800 |
// a static page is used as front page |
| 801 |
if (($post_id = get_option('page_on_front')) && $id = $this->get_post($post_id, $language)) |
| 802 |
$url = _get_page_link($id); |
| 803 |
|
| 804 |
return isset($url) ? $url : get_term_link($language, 'language'); |
| 805 |
} |
| 806 |
|
| 807 |
// adds 'lang_url' as possible value to the 'show' parameter of bloginfo to display the home url in the correct language |
| 808 |
// FIXME not tested |
| 809 |
function bloginfo_url($output, $show) { |
| 810 |
if ($show == 'lang_url' && $this->curlang) { |
| 811 |
$url = $this->get_home_url($this->curlang); |
| 812 |
$output = isset($url) ? $url : get_option('home'); |
| 813 |
} |
| 814 |
return $output; |
| 815 |
} |
| 816 |
|
| 817 |
// Template tag: Displays links to the current page in other languages |
| 818 |
// Usage: do_action('the_languages'); |
| 819 |
function the_languages($args = '') { |
| 820 |
$defaults = array( |
| 821 |
'dropdown' => 0, // display as list and not as dropdown |
| 822 |
'show_names' => 1, // show language names |
| 823 |
'show_flags' => 0, // don't show flags |
| 824 |
'hide_if_empty' => 1 // hides languages with no posts (or pages) |
| 825 |
); |
| 826 |
extract(wp_parse_args($args, $defaults)); |
| 827 |
|
| 828 |
$listlanguages = $this->get_languages_list($hide_if_empty); |
| 829 |
$output = $dropdown ? '<select name="lang_choice" id="lang_choice">' : "<ul>\n"; |
| 830 |
|
| 831 |
foreach ($listlanguages as $language) { |
| 832 |
if ($dropdown) { |
| 833 |
$output .= sprintf( |
| 834 |
"<option value='%s'%s>%s</option>\n", |
| 835 |
esc_attr($language->slug), |
| 836 |
$language->slug == $this->curlang->slug ? ' selected="selected"' : '', |
| 837 |
esc_attr($language->name) // FIXME flag does not work for the dropdown list |
| 838 |
); |
| 839 |
} |
| 840 |
else { |
| 841 |
$url = $this->get_translation_url($language); |
| 842 |
$url = isset($url) ? $url : $this->get_home_url($language); // if the page is not translated, link to the home page |
| 843 |
|
| 844 |
$class = 'lang-item lang-item-'.esc_attr($language->term_id); |
| 845 |
$class .= $language->slug == $this->curlang->slug ? ' current-lang' : ''; |
| 846 |
|
| 847 |
$flag = $show_flags && ( |
| 848 |
file_exists(POLYLANG_DIR.($file = '/local_flags/'.$language->description.'.png')) || |
| 849 |
file_exists(POLYLANG_DIR.($file = '/local_flags/'.$language->description.'.jpg')) || |
| 850 |
file_exists(POLYLANG_DIR.($file = '/flags/'.$language->description.'.png')) ) ? |
| 851 |
'<img src="'.esc_url(WP_PLUGIN_URL.'/polylang'.$file).'" alt="'.esc_attr($language->name).'" />' : ''; |
| 852 |
|
| 853 |
$name = $show_names || !$show_flags ? esc_attr($language->name) : ''; |
| 854 |
|
| 855 |
$output .= '<li class="'.$class.'"><a href="'.esc_url($url).'">'.($show_flags && $show_names ? $flag.' '.$name : $flag.$name)."</a></li>\n"; |
| 856 |
} |
| 857 |
} |
| 858 |
|
| 859 |
$output .= $dropdown ? '</select>' : "</ul>\n"; |
| 860 |
echo $output; |
| 861 |
} |
| 862 |
|
| 863 |
} // class Polylang |
| 864 |
|
| 865 |
if (class_exists("Polylang")) |
| 866 |
new Polylang(); |
| 867 |
|
| 868 |
?> |
| 869 |
|
