Description: This plugin modify on the fly the translation of the theme depending the language of the post or other blog elements - a way to create a real multilanguage site (cms or blog). Numerous template tags and three widgets are included. It introduce a new taxonomy - here language - to describe posts and pages. To complete with tags, use also xili-tidy-tags plugin. To include and set translation of .mo files use xili-dictionary plugin. Includes add-on for multilingual bbPress forums.

Version: 2.8.1

License: GPLv2

Text Domain: xili-language

Domain Path: /languages/

# updated 120921 - 2.8.1 - fixes sticky perma - improvements for bbPress - new filters in admin - fixes feed links meta

# updated 120903 - 2.8.0 - fixes, new: admin side language selection - b : langstate

# updated 120819 - 120723 - 2.7.1 - fixes lang_perma detect for permalinks add-ons - new start via action

# updated 120721 - 2.7.0 - multilingual features in media library - centralize alert messages and ready for link to wiki

# updated 120708 - 2.6.3 - fixes notice when page-on-front - new icons - test propagate cats

# updated 120701 - 2.6.2 - add news pointer in class admin, tabs in help

# updated 120615 - 2.6.1 - fixes notice xlrp

# updated 120528 - 2.6.0 - class admin in separate file, able to detect and use local files (local-xx_XX.mo) containing translations

# updated 120420 - 2.5.1 - add style for post edit (flag in imput)

# updated 120415 - 2.5.0 - new dashboard metabox for translations list of linked posts and actions (as in XD2), language postmetas now hidden, hreflang link added in head, WP3.4 pre-tests: fixes metaboxes columns

# updated 120329 - 2.4.4 - fixes posts list language column in 3.2.1

# updated 120225 - 2.4.3 - fixes before releasing

# updated 120212 - 2.4.2 - admin_bar replaced by toolbar and node (>= WP3.3) - cc: + Reply-To: - better merge loadthemedomain in multisite - ready for XD 2.0 - sub-sub-folder for language files

# updated 120128 - 2.4.1 - new readme - new tabs in settings - improved lang slug creation - test menu location get_registered_nav_menus - 

# updated 111222 - 2.4.0 - if needed and present add rtl.css for rtl languages - new date based on wp_locale - time options

# less than 2.4….

# see readme text for these intermediate versions for WP 2.x. or visit other previous versions (2.5).

define('XILILANGUAGE_VER','2.8.1'); /* used in admin UI*/

define('XILILANGUAGE_WP_VER','3.3'); /* used in error - see at end */

define('XILILANGUAGE_PHP_VER','5.0.0'); /* used in error - see at end */

define('XILILANGUAGE_PREV_VER','2.4.3');

/********************* the CLASS **********************/

	var $xili_settings; /* saved in options */

	var $langs_group_id; /* group ID and Term Taxo ID */

	var $langs_group_tt_id; 

	var $default_slug; /* slug of language of config.php since 1.5.3 wpmu*/

	var $thetextdomain = ""; /* since 1.5.2 - used if multiple */

	var $lang_neither_browser = ''; // when neither match with browser

	var $rtllanglist = 'ar-he-fa-ur'; /* default-list - can be set after class instantiation */

	var $domaindetectmsg = ""; // used if pb with load_theme_textdomain

	var $langs_list_options = array( array('','default'), array('typeone','Type #1'), array('typeonenew','Type for single'), array('navmenu', 'Nav Menu' ) , array('navmenu-1', 'Nav Menu Singular' ) ); // type of languages list see options in xili_language_list or navmenu

	var $comment_form_labels = array ( // since 1.6.0 for comment_form 

		'name' => 'Name',

		'email' => 'Email',

		'website' => 'Website',

		'comment' => 'Comment',

		'youmustbe' => 'You must be <a href="%s">logged in</a> to post a comment.',

		'loggedinas' => 'Logged in as <a href="%1$s">%2$s</a>. <a href="%3$s" title="Log out of this account">Log out?</a>',

		'emailnotpublished' => 'Your email address will not be published.',

		'requiredmarked' => ' Required fields are marked <span class="required">*</span>',

		'youmayuse' => 'You may use these <abbr title="HyperText Markup Language">HTML</abbr> tags and attributes:',

		'leavereply' => 'Leave a Reply',

		'replyto' => 'Leave a Reply to %s',

		'cancelreply' => 'Cancel reply',

		'postcomment' => 'Post Comment'

		);

	var $sticky_keep_original = false ; // since 1.6.1 see translate_sticky_posts_ID function 

	var $xl_recent_posts = false ;

	var $ltd = false ; // load_textdomain detected 1.8.5

	var $arraydomains = array();

	var $show = false ;

	var $langs_ids_array ; // array slug => id

	var $langs_slug_name_array ; // array slug => name // 2.4.2

	var $langs_slug_fullname_array; // array slug => full name // 2.6.3

	var $show_page_on_front = false; 

	/* for permalink with lang at root */

	var $lang_perma = false; // if true new permalink for root and categories /en_us/category/.... if special action available… 2.1.1

	var $lpr = ''; // 2.3.2

	var $show_page_on_front_array = array(); // array of lang=>page_id if show_on_front == page

	var $undefchar = "."; // 2.2.3 - used to detect undefined

	var $sublang = ""; // 2.2.3 - used to detect - or fr_fr- of like

	// 2.5

	// other in class admin

	var $translation_state = '_xl_translation_state' ; // set to initial when post created from dashboard metabox (to update post slug)

	// 2.6 - class admin in separate file

	var $file_file = ''; // see in construct below

	var $file_basename = '';

	var $plugin_basename = '';

	var $plugin_url = '';

	var $plugin_path = ''; // The path to this plugin - see construct

	var $xilidev_folder = '/xilidev-libraries'; //must be in plugins

	//since 2.7.1 - updated 2.8.0

	var $examples_list = array();

	/**** Construct is future ****/

	public function __construct( $locale_method = false, $show = false, $class_admin = false ) {

		// 2.6 - class admin in separate file

		$this->file_file = __FILE__ ; // see in construct below

		$this->file_basename = basename(__FILE__) ;

		$this->plugin_basename = plugin_basename(__FILE__) ;

		$this->plugin_url = plugins_url('', __FILE__) ; 

		$this->plugin_path = plugin_dir_path(__FILE__) ;

		$this->show = $show;

		$this->class_admin = $class_admin;

		/* activated when first activation of plug */

		$this->ossep = strtoupper( substr(PHP_OS ,0 ,3 ) == 'WIN' ) ? '\\' : '/';	

		/** 

		 * get current settings

		 */

		$this->xili_settings = get_option('xili_language_settings'); 

		if( false === $this->xili_settings ) { //1.9.1

			$this->initial_settings ();

			update_option('xili_language_settings', $this->xili_settings);				

		} else {

			if ($this->xili_settings['version'] == '1.9') { /* 2.4.0 */	

				$this->xili_settings['wp_locale'] = 'wp_locale'; //wp_locale new mode

				$this->xili_settings['version'] = '2.0';

				update_option('xili_language_settings', $this->xili_settings); //

			}

			if ($this->xili_settings['version'] == '2.0') { /* 2.4.0 */	

				$this->xili_settings['available_langs'] = array(); // default array 

				$this->xili_settings['version'] = '2.1';

				update_option('xili_language_settings', $this->xili_settings); //

			}

			if ($this->xili_settings['version'] == '2.1') { /* 2.6.0 */	

				$this->xili_settings['external_xl_style'] = "on";

				$this->xili_settings['creation_redirect'] = 'redirect'; // default - after initial creation 

				$this->xili_settings['version'] = '2.2';

				update_option('xili_language_settings', $this->xili_settings);  //

			}

			if ( ! isset ( $this->xili_settings['version'] ) || $this->xili_settings['version'] != '2.2') { // repair or restart from new

				$this->initial_settings ();

				update_option('xili_language_settings', $this->xili_settings);  

			}

		}

		if ( ! $class_admin ) {

			if ( ! defined( 'TAXONAME' ) ) define('TAXONAME', $this->xili_settings['taxonomy']);

			if ( ! defined( 'QUETAG' ) ) define('QUETAG', $this->xili_settings['reqtag']); // 'lang'

			if ( ! defined( 'TAXOLANGSGROUP' ) ) define('TAXOLANGSGROUP', $this->xili_settings['taxolangsgroup']);

			if ( ! defined( 'LANG_UNDEF' ) ) define('LANG_UNDEF', $this->xili_settings['lang_undefined']); //2.2.3

		}

		$this->browseroption = $this->xili_settings['browseroption']; 

		$this->lang_neither_browser = $this->xili_settings['lang_neither_browser']; // 2.3.1

		$this->authorbrowseroption = $this->xili_settings['authorbrowseroption'];

		//$this->thetextdomain = $this->xili_settings['theme_domain']; /* since 1.5.2 */

		$this->langsliststatus = $this->xili_settings['langs_list_status'];  /* 1.6.0 */

		/* detect research about permalinks */

		//$this->lang_perma = ( has_filter ( 'term_link', 'insert_lang_4cat' ) ) ? true : false ;	// 1.4.1

		$this->show_page_on_front = ( 'page' == $this->get_option_wo_xili('show_on_front') ) ;

		if ( !$class_admin )  { // filtering only one time 2.6

			add_action( 'init', array(&$this,'init_textdomain'));

			add_action( 'init', array(&$this,'init_and_register_language_post_taxonomy') );

		}

		add_action( 'init', array(&$this,'init_vars') ); // moved here 2.8.0

		if ( !$class_admin ) { // filtering only one time 2.6

			add_action( 'init', array(&$this,'add_link_taxonomy'), 12 ); // 1.8.5	

			/* special to detect theme changing since 1.1.9 */

			add_action( 'switch_theme', array(&$this,'theme_switched') );	

			/* query filters */	

			add_filter( 'posts_join', array(&$this,'posts_join_with_lang'), 10, 2 );

			add_filter( 'posts_where', array(&$this,'posts_where_lang'), 10, 2 );

			add_filter( 'posts_search', array(&$this,'posts_search_filter'), 10, 2 ); //2.2.3

			add_action( 'pre_get_posts', array(&$this,'xiliml_modify_querytag') );

			add_action( 'wp', array(&$this,'xiliml_language_wp') ); /// since 2.2.3 - wp_loaded - wp before

			/* 'wp' = where theme's language is defined just after query */

			if ( $this->xili_settings['wp_locale'] == 'wp_locale' )

				add_action( 'wp', array(&$this,'xili_locale_setup'), 15 ); // since 2.4

			if ( $this->locale_method )

				add_filter('locale', array(&$this,'xiliml_setlocale'), 10);

			/* to be compatible with l10n cache from Johan since 1.1.9 */

	 		add_filter( 'widget_title', array(&$this,'one_text')); /* added 0.9.8.1 */

		 	add_filter( 'widget_text', array(&$this,'one_text'));

			add_filter( 'list_cats', array(&$this,'xiliml_cat_language'), 10, 2 ); /* mode 2 : content = name */

			add_filter( 'link_category', array(&$this,'one_text')); // 1.6.0 for wp_list_bookmarks (forgotten)

			add_filter( 'category_link', array(&$this,'xiliml_link_append_lang'), 10, 2 );

			$filter = 'category_link';

			$function = 'xiliml_link_append_lang';

			$this->idx['xiliml_link_append_lang'] = _wp_filter_build_unique_id($filter, array (&$this, $function == '' ? $filter : $function), 10, 2); 

			/* unique id of this filter from object fixed 1.0.1 */

			add_filter( 'category_description',array(&$this,'xiliml_link_translate_desc'));

			add_filter( 'single_cat_title',array(&$this,'xiliml_single_cat_title_translate')); /* 1.4.1 wp_title() */

			add_filter( 'tag_link', array(&$this,'xiliml_taglink_append_lang' ));

			add_filter( 'bloginfo', array(&$this,'xiliml_bloginfo'), 10, 2); /* since 1.6.0 - description - date - time */

			/* filters for archives since 0.9.9.4 */

			add_filter( 'getarchives_join', array(&$this, 'xiliml_getarchives_join'), 10, 2 );

			add_filter( 'getarchives_where', array(&$this, 'xiliml_getarchives_where'), 10, 2 );

			add_filter( 'get_archives_link', array(&$this, 'xiliml_get_archives_link') );

			/* option modified */

			add_filter( 'option_sticky_posts', array(&$this, 'translate_sticky_posts_ID') ); /* 1.6.1 */

			add_filter( 'option_page_on_front', array(&$this, 'translate_page_on_front_ID') ); /* 1.7.0 */

			$filter = 'option_page_on_front';

			$function = 'translate_page_on_front_ID';

			$this->idx['translate_page_on_front_ID'] = _wp_filter_build_unique_id($filter, array (&$this, $function == '' ? $filter : $function), 10, 2);

			/* bookmarks and widget_links  1.8.5  #2500 */

			add_filter( 'widget_links_args', array( &$this, 'widget_links_args_and_lang' ), 10, 1 ); // in class WP_Widget_Links (default-widgets.php)

			add_filter( 'get_bookmarks', array( &$this, 'the_get_bookmarks_lang' ), 10, 2); // only active if 'lang' in wp_list_bookmarks()

			add_action( 'wp_head', array(&$this,'head_insert_language_metas'), 11 ); // © and options present in functions.php

			if ( !is_admin() ) {

				add_filter( 'the_category', array(&$this,'xl_get_the_category_list'), 10, 2); /* 1.7.0 */

				add_filter( 'gettext', array(&$this,'change_plugin_domain'), 10, 3); /* 1.8.7 */

				add_filter( 'gettext_with_context', array(&$this,'change_plugin_domain_with_context'), 10, 4); /* 1.8.8 */

				add_filter( 'ngettext', array(&$this,'change_plugin_domain_plural'), 10, 5);

				add_filter( 'ngettext_with_context', array(&$this,'change_plugin_domain_plural_with_context'), 10, 6);

				// for wp nav menu

				add_filter('the_title', array(&$this,'wp_nav_title_text'),10,2);

				if ('' != $this->xili_settings['in_nav_menu'])

						add_filter('wp_nav_menu_items', 'xili_nav_lang_list',10,2);

				if ('' != $this->xili_settings['page_in_nav_menu'])

						add_filter('wp_nav_menu_items', 'xili_nav_page_list',9,2); // before lang's links - 1.7.1

				if ('' != $this->xili_settings['home_item_nav_menu'])

						add_filter('walker_nav_menu_start_el', 'xili_nav_page_home_item',10,4); // add lang if - 1.8.9.2

				add_filter( 'language_attributes',  array(&$this,'head_language_attributes'));

				add_action( 'wp_head', array(&$this,'head_insert_hreflang_link' ), 10 ); // since 2.5

				add_filter( 'option_date_format', array(&$this, 'translate_date_format') ); /* 1.7.0 */

				add_filter( 'category_feed_link', array(&$this, 'category_feed_link') ); // 2.8.1

			}

			// since 1.5.5

			add_filter( 'comment_form_default_fields', array(&$this,'xili_comment_form_default_fields'));

			add_filter( 'comment_form_defaults', array(&$this,'xili_comment_form_defaults'));

			// since 2.4.0 for rtl.css

			add_filter( 'locale_stylesheet_uri', array(&$this, 'change_locale_stylesheet_uri' ),10, 2 ) ;

			// since 1.8.8 - activate xl widget series

			if ( $this->xili_settings['widget'] == 'enable' )

				add_action( 'widgets_init', array(&$this,'add_new_widgets') );

			/* new actions for xili-language theme's templates tags */

			$this->add_action( 'xili_language_list', 'xili_language_list', 10, 5); /* add third param 0.9.7.4 - 4th 1.6.0*/

			$this->add_action( 'xili_post_language', 'xili_post_language', 10, 2);

			$this->add_action( 'xiliml_the_other_posts', 'the_other_posts', 10, 4); /* add a param 1.1 */

			$this->add_action( 'xiliml_the_category', 'the_category', 10, 3);

			$this->add_filter( 'xiliml_langinsearchform', 'xiliml_langinsearchform', 10, 3); // 1.8.2 action to filter

		// verify theme and set ltd for both parent and admin child

			add_filter( 'override_load_textdomain', array(&$this,'xiliml_override_load'), 10, 3); // since 1.5.0

			add_filter( 'theme_locale', array(&$this,'xiliml_theme_locale'), 10, 2);	// two times if is_admin()

		}

	}

	/** 

	 * first activation or empty settings 

	 */

	function initial_settings () {

		$this->xili_settings = array(

			    'version' 		=> '2.2',

			    'reqtag'		=> 'lang', // query_var

			    'homelang' => '',

			    'langs_list_status' => '',

			    'in_nav_menu' => '',

			    'page_in_nav_menu' => '',

				'args_page_in_nav_menu' => '',

				'multilingual_custom_post' => array(),

				'langs_in_root_theme' => '',

				'domains' => array( 'all' => 'disable', 'default' => 'disable','bbpress' => 'disable' ),  // no default domain to theme domain 1.8.7

				'widget' => 'enable',

				'delete_settings' => '', //1.8.8 for uninstall

				'allcategories_lang' => 'browser', // 1.8.9.1

				'lang_features' => array() ,

				'home_item_nav_menu' => '', // 1.8.9.2

				'lang_undefined' => $this->undefchar, //2.2.3

				'lang_neither_browser' => '', // 2.3.1

				'wp_locale' => 'wp_locale', // 2.7.1 new mode as default - 2.4.0 = old mode based on db strftime

				'available_langs' => array(),

				'creation_redirect' => 'redirect', // 2.6 to redirect to new post after creation

				'external_xl_style' => "on" // activate external xl-style.css - on by default :2.6.3

	/* first activation of plugin */

	function xili_language_activate() {

		$this->xili_settings = get_option('xili_language_settings');

		if( empty($this->xili_settings) ) {

			$this->initial_settings ();

		    update_option('xili_language_settings', $this->xili_settings);  

		}

	}

	function add_action ( $action, $function = '', $priority = 10, $accepted_args = 1 )

	function add_filter ( $filter, $function = '', $priority = 10, $accepted_args = 1 )

	/**

	 * for wpmu 

	 * register functions must be called by init

	 *

	 * @since 1.5.1

	 *

	 */

	function init_and_register_language_post_taxonomy () {

		/** add new taxonomy in available taxonomies 

		 * 1.0.2 - add label false as http://core.trac.wordpress.org/ticket/10437 

		 * 			to avoid metabox as tag displayed  , 'query_var' => QUETAG 

		 * @updated 1.4.1

		 */

		if ( !$this->class_admin ) {

			if ( $this->xili_settings['wp_locale'] == 'wp_locale' )

				xiliml_declare_xl_wp_locale ();

			if ( $this->lang_perma ) {

				register_taxonomy( TAXONAME, 'post', array('hierarchical' => false, 'label' => false, 'rewrite' => false , 'update_count_callback' => array(&$this, '_update_post_lang_count'), 'show_ui' => false, '_builtin' => false, 'query_var' => QUETAG ));

				$this->lpr = "-"; // 2.3.2

			} else {

				add_filter('query_vars', array(&$this,'keywords_addQueryVar')); // now in taxonomy decl. // 2.1.1

				register_taxonomy( TAXONAME, 'post', array('hierarchical' => false, 'label' => false, 'rewrite' => false , 'update_count_callback' => array(&$this, '_update_post_lang_count'), 'show_ui' => false, '_builtin' => false ));

			}

			register_taxonomy( TAXOLANGSGROUP, 'term', array('hierarchical' => false, 'update_count_callback' => '', 'show_ui' => false, 'label'=>false, 'rewrite' => false, '_builtin' => false ));

		}

	}

	/**

	 * since 2.6

	 *

	 */

	function init_vars () {

		$this->examples_list = array(

		'af' => __('afrikaans','xili-language'),

		'ar_AR' => __('arabic', 'xili-language'),

		'be_BY' => __('belarusian', 'xili-language'),

		'bs_BA' => __('bosnian', 'xili-language'),

		'bg_BG' => __('bulgarian', 'xili-language'),

		'bn_BD' => __('bangla', 'xili-language'),

		'ca' => __('catalan', 'xili-language'),

		'cs_CZ' => __('czech', 'xili-language'),

		'cy' => __('welsh', 'xili-language'),

		'da_DK' => __('danish', 'xili-language'),

		'de_DE' => __('german', 'xili-language'),

		'el' => __('greek', 'xili-language'),

		'en_GB' => __('british english', 'xili-language'),

		'en_US' => __('english', 'xili-language'),

		'eo' => __('esperanto', 'xili-language'),

		'es_ES' => __('spanish', 'xili-language'),

		'es_CL' => __('chilean', 'xili-language'),

		'et' => __('estonian', 'xili-language'),

		'eu' => __('euskara', 'xili-language'),

		'fa_IR' => __('persian', 'xili-language'),

		'fi_FI' => __('finnish', 'xili-language'),

		'fo' => __('faroese', 'xili-language'),

		'fr_FR' => __('french', 'xili-language'),

		'ge_GE' => __('georgian', 'xili-language'),

		'gl_ES' => __('galician', 'xili-language'),

		'he_IL' => __('hebrew', 'xili-language'),

		'hr' => __('croatian', 'xili-language'),

		'hu_HU' => __('hungarian', 'xili-language'),

		'id_ID' => __('indonesian', 'xili-language'),

		'is_IS' => __('icelandic', 'xili-language'),

		'it_IT' => __('italian', 'xili-language'),

		'ja' => __('japanese', 'xili-language'),

		'km_KH' => __('khmer', 'xili-language'),

		'ko_KR' => __('korean', 'xili-language'),

		'lt_LT' => __('lithuanian', 'xili-language'),

		'lv' => __('latvian', 'xili-language'),

		'mg_MG' => __('malagasy', 'xili-language'),

		'mk_MK' => __('macedonian', 'xili-language'),

		'mn_MN' => __('mongolian', 'xili-language'),

		'ms_MY' => __('malay', 'xili-language'),

		'nb_NO' => __('norwegian', 'xili-language'),

		'ni_ID' => __('nias', 'xili-language'),

		'nl_NL' => __('dutch', 'xili-language'),

		'pl_PL' => __('polish', 'xili-language'),

		'pt_BR' => __('brazilian portuguese', 'xili-language'),

		'pt_PT' => __('portuguese', 'xili-language'),

		'ro_RO' => __('romanian', 'xili-language'),

		'ru_RU' => __('russian', 'xili-language'),

		'si_LK' => __('sinhala', 'xili-language'),

		'sk_SK' => __('slovak', 'xili-language'),

		'sl_SI' => __('slovenian', 'xili-language'),

		'sq_AL' => __('albanian', 'xili-language'),

		'sr_CS' => __('serbian', 'xili-language'),

		'sv_SE' => __('swedish', 'xili-language'),

		'su_ID' => __('sundanese', 'xili-language'),

		'tg' => __('tajik', 'xili-language'),

		'th' => __('thai', 'xili-language'),

		'tr' => __('turkish', 'xili-language'),

		'uk_UA' => __('ukrainian', 'xili-language'),

		'uz_UZ' => __('uzbek', 'xili-language'),

		'vi' => __('vietnamese', 'xili-language'),

		'zh_CN' => __('chinese', 'xili-language'),

		'zh_TW' => __('taiwan chinese', 'xili-language'),

		'zh_HK' => __('hong kong chinese', 'xili-language')

		);

		/* default values */

		if ( ''!= WPLANG && ( strlen( WPLANG )==5 || strlen( WPLANG ) == 2 ) ) : // for japanese

			$this->default_lang = WPLANG;

		else:

			$this->default_lang = 'en_US';

		endif;