| 1 |
<?php |
| 2 |
// filters posts and terms by language, rewrites links to include the language, etc... |
| 3 |
// used only for frontend |
| 4 |
class Polylang_Core extends Polylang_base { |
| 5 |
private $curlang; // current language |
| 6 |
private $default_locale; |
| 7 |
private $list_textdomains = array(); // all text domains |
| 8 |
private $search_form_filter = false; // did we pass our get_search_form filter ? |
| 9 |
|
| 10 |
// options often needed |
| 11 |
private $page_for_posts; |
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private $page_on_front; |
| 13 |
|
| 14 |
function __construct() { |
| 15 |
parent::__construct(); |
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|
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// init options often needed |
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$this->page_for_posts = get_option('page_for_posts'); |
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$this->page_on_front = get_option('page_on_front'); |
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|
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// sets the language of comment |
| 22 |
add_action('pre_comment_on_post', array(&$this, 'pre_comment_on_post')); |
| 23 |
|
| 24 |
// text domain management |
| 25 |
add_action('init', array(&$this, 'init')); |
| 26 |
add_filter('override_load_textdomain', array(&$this, 'mofile'), 10, 3); |
| 27 |
add_action('wp', array(&$this, 'load_textdomains')); |
| 28 |
add_action('login_init', array(&$this, 'load_textdomains')); |
| 29 |
|
| 30 |
// filters posts according to the language |
| 31 |
add_filter('pre_get_posts', array(&$this, 'pre_get_posts')); |
| 32 |
|
| 33 |
// filter sticky posts by current language |
| 34 |
add_filter('option_sticky_posts', array(&$this, 'option_sticky_posts')); |
| 35 |
|
| 36 |
// translates page for posts and page on front |
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add_filter('option_page_for_posts', array(&$this, 'translate_page')); |
| 38 |
add_filter('option_page_on_front', array(&$this, 'translate_page')); |
| 39 |
} |
| 40 |
|
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// set these filters and actions only once the current language has been defined |
| 42 |
function add_language_filters() { |
| 43 |
// filters the WordPress locale |
| 44 |
add_filter('locale', array(&$this, 'get_locale')); |
| 45 |
|
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// modifies the language information in rss feed |
| 47 |
// useful if WP < 3.4 |
| 48 |
add_filter('option_rss_language', array(&$this, 'option_rss_language')); |
| 49 |
|
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// filters categories and post tags by language |
| 51 |
add_filter('terms_clauses', array(&$this, 'terms_clauses'), 10, 3); |
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|
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// meta in the html head section |
| 54 |
add_action('wp_head', array(&$this, 'wp_head')); |
| 55 |
|
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// modifies the page link in case the front page is not in the default language |
| 57 |
add_filter('page_link', array(&$this, 'page_link'), 10, 2); |
| 58 |
|
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// prevents redirection of the homepage |
| 60 |
add_filter('redirect_canonical', array(&$this, 'redirect_canonical'), 10, 2); |
| 61 |
|
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// adds javascript at the end of the document |
| 63 |
add_action('wp_print_footer_scripts', array(&$this, 'wp_print_footer_scripts')); |
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|
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// adds the language information in the search form |
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// low priority in case the search form is created using the same filter as described in http://codex.wordpress.org/Function_Reference/get_search_form |
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add_filter('get_search_form', array(&$this, 'get_search_form'), 99); |
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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 archives, next and previous post links to filter them by language |
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foreach (array('getarchives', 'get_previous_post', 'get_next_post') as $filter) |
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foreach (array('_join', '_where') as $clause) |
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add_filter($filter.$clause, array(&$this, 'posts'.$clause)); |
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|
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// rewrites author and date links to filter them by language |
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foreach (array('feed_link', 'author_link', 'post_type_archive_link', 'year_link', 'month_link', 'day_link') as $filter) |
| 82 |
add_filter($filter, array(&$this, 'archive_link')); |
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|
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$this->add_post_term_link_filters(); // these filters are in base as they may be used on admin side too |
| 85 |
|
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// filters the nav menus according to the current language |
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add_filter('theme_mod_nav_menu_locations', array(&$this, 'nav_menu_locations')); |
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add_filter('wp_nav_menu_args', array(&$this, 'wp_nav_menu_args')); |
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add_filter('wp_nav_menu_items', array(&$this, 'wp_nav_menu_items'), 10, 2); |
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|
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// filters the widgets according to the current language |
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add_filter('widget_display_callback', array(&$this, 'widget_display_callback'), 10, 3); |
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|
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// strings translation (must be applied before WordPress applies its default formatting filters) |
| 95 |
add_filter('widget_title', array(&$this, 'widget_title'), 1); |
| 96 |
add_filter('bloginfo', array(&$this, 'bloginfo'), 1, 2); |
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add_filter('get_bloginfo_rss', array(&$this, 'bloginfo'), 1, 2); |
| 98 |
|
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// modifies the home url |
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if (PLL_FILTER_HOME_URL) |
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add_filter('home_url', array(&$this, 'home_url')); |
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|
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// Template tag: displays the language switcher |
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// FIXME Backward compatibility for versions < 0.5 -> replaced by pll_the_languages |
| 105 |
add_action('the_languages', array(&$this, 'the_languages')); |
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} |
| 107 |
|
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// returns the language according to browser preference or the default language |
| 109 |
function get_preferred_language() { |
| 110 |
// check first is the user was already browsing this site |
| 111 |
if (isset($_COOKIE['wordpress_polylang'])) |
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return $this->get_language($_COOKIE['wordpress_polylang']); |
| 113 |
|
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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 |
| 116 |
if ($this->options['browser']) { |
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$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 |
| 135 |
$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 = $language; |
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} |
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} |
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} |
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} // options['browser'] |
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|
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// return default if there is no preferences in the browser or preferences does not match our languages or it is requested not to use the browser preference |
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return isset($pref_lang) && !is_wp_error($pref_lang) ? $pref_lang : $this->get_language($this->options['default_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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if ($this->curlang) |
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return $this->curlang; |
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|
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// no language set for 404 and attachment |
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if (is_404() || is_attachment() || current_filter() == 'login_init') |
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return $this->get_preferred_language(); |
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|
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if ($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()) && ( ($var = get_queried_object_id()) || ($var = get_query_var('p')) || ($var = get_query_var('page_id')) )) |
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$lang = $this->get_post_language($var); |
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|
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else { |
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foreach ($this->taxonomies as $taxonomy) { |
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if ($var = get_query_var(get_taxonomy($taxonomy)->query_var)) |
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$lang = $this->get_term_language($var, $taxonomy); |
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} |
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} |
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return isset($lang) ? $lang : false; |
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} |
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|
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// sets the language of comment |
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// useful to redirect to correct post comment url when adding the language to all url |
| 175 |
function pre_comment_on_post($post_id) { |
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$this->curlang = $this->get_post_language($post_id); |
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$this->add_post_term_link_filters(); |
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} |
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|
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// save the default locale before we start any language manipulation |
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function init() { |
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$this->default_locale = get_locale(); |
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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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return $this->curlang->description; |
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} |
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|
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// modifies the language information in rss feed |
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function option_rss_language($value) { |
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return get_bloginfo_rss('language'); |
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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' => $domain); |
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return true; // prevents WP loading text domains as we will load them all later |
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} |
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|
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// NOTE: I believe there are two ways for a plugin to force the WP language |
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// as done by xili_language and here: load text domains and reinitialize wp_locale with the action 'wp' |
| 203 |
// as done by qtranslate: define the locale with the action 'plugins_loaded', but in this case, the language must be specified in the url. |
| 204 |
function load_textdomains() { |
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|
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// our override_load_textdomain filter has done its job. let's remove it before calling load_textdomain |
| 207 |
remove_filter('override_load_textdomain', array(&$this, 'mofile')); |
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|
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// check there is at least one language defined and sets the current language |
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if ($this->get_languages_list() && $this->curlang = $this->get_current_language()) { |
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|
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// set a cookie to remember the language. check headers have not been sent to avoid ugly error |
| 213 |
if (!headers_sent()) |
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setcookie('wordpress_polylang', $this->curlang->slug, time() + 31536000 /* 1 year */, COOKIEPATH, COOKIE_DOMAIN); |
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|
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// set all our language filters and actions |
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$this->add_language_filters(); |
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|
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// now we can load text domains with the right language |
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$new_locale = get_locale(); |
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foreach ($this->list_textdomains as $textdomain) |
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load_textdomain( $textdomain['domain'], str_replace($this->default_locale, $new_locale, $textdomain['mo'])); |
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|
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// and finally load user defined strings |
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global $l10n; |
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$l10n['pll_string'] = $this->mo_import($this->curlang); |
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|
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// reinitializes wp_locale for weekdays and months, as well as for text direction |
| 229 |
global $wp_locale; |
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$wp_locale->init(); |
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$wp_locale->text_direction = get_metadata('term', $this->curlang->term_id, '_rtl', true) ? 'rtl' : 'ltr'; |
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} |
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|
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else { |
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// cant't work so load the text domains with WordPress default language |
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foreach ($this->list_textdomains as $textdomain) |
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load_textdomain($textdomain['domain'], $textdomain['mo']); |
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} |
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} |
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|
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// filters posts according to the language |
| 242 |
function pre_get_posts($query) { |
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// don't make anything if no language has been defined yet |
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if (!$this->get_languages_list()) |
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return; |
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|
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$qvars = $query->query_vars; |
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|
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// users may want to display content in a different language than the current one by setting it explicitely in the query |
| 250 |
if ($this->curlang && isset($qvars['lang']) && $qvars['lang']) |
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return; |
| 252 |
|
| 253 |
// detect our exclude pages query and returns to avoid conflicts |
| 254 |
// this test should be sufficient |
| 255 |
if (isset($qvars['tax_query'][0]['taxonomy']) && $qvars['tax_query'][0]['taxonomy'] == 'language' && |
| 256 |
isset($qvars['tax_query'][0]['operator']) && $qvars['tax_query'][0]['operator'] == 'NOT IN') |
| 257 |
return; |
| 258 |
|
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// homepage is requested, let's set the language |
| 260 |
if (is_home() && !$this->curlang) { |
| 261 |
// special case for wp-signup.php & wp-activate.php for which WP set is_home to true |
| 262 |
if (false === strpos($_SERVER['SCRIPT_NAME'], 'index.php')) { |
| 263 |
$this->curlang = $this->get_preferred_language(); |
| 264 |
return; |
| 265 |
} |
| 266 |
|
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// now, it should be the true homepage |
| 268 |
// find out the language |
| 269 |
if ($this->options['hide_default'] && isset($_COOKIE['wordpress_polylang'])) |
| 270 |
$this->curlang = $this->get_language($this->options['default_lang']); |
| 271 |
else |
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$this->curlang = $this->get_preferred_language(); // sets the language according to browser preference or default language |
| 273 |
|
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// we are already on the right page |
| 275 |
if ($this->options['default_lang'] == $this->curlang->slug && $this->options['hide_default']) { |
| 276 |
if ($this->page_on_front && $link_id = $this->get_post($this->page_on_front, $this->curlang)) |
| 277 |
$query->set('page_id', $link_id); |
| 278 |
else |
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$query->set('lang', $this->curlang->slug); |
| 280 |
} |
| 281 |
// redirect to the home page in the right language |
| 282 |
else { |
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wp_redirect($this->get_home_url($this->curlang)); |
| 284 |
exit; |
| 285 |
} |
| 286 |
} |
| 287 |
|
| 288 |
// redirect the language page to the homepage |
| 289 |
if ($this->options['redirect_lang'] && is_tax('language') && count($query->query) == 1 && $this->page_on_front) { |
| 290 |
$this->curlang = $this->get_language(get_query_var('lang')); |
| 291 |
$query->parse_query('page_id='.$this->get_post($this->page_on_front, $this->curlang)); |
| 292 |
return; |
| 293 |
} |
| 294 |
|
| 295 |
// sets is_home on translated home page when it displays posts |
| 296 |
// is_home must be true on page 2, 3... too |
| 297 |
if (!$this->page_on_front && is_tax('language') && (count($query->query) == 1 || (is_paged() && count($query->query) == 2))) { |
| 298 |
$query->is_home = true; |
| 299 |
$query->is_tax = false; |
| 300 |
$this->curlang = $this->get_language(get_query_var('lang')); // sets the language now otherwise it will be too late to filter sticky posts ! |
| 301 |
} |
| 302 |
|
| 303 |
// sets the language for posts page in case the front page displays a static page |
| 304 |
if ($this->page_for_posts) { |
| 305 |
// If permalinks are used, WordPress does set and use $query->queried_object_id and sets $query->query_vars['page_id'] to 0 |
| 306 |
// and does set and use $query->query_vars['page_id'] if permalinks are not used :( |
| 307 |
if (isset($qvars['pagename']) && $qvars['pagename'] && isset($query->queried_object_id)) |
| 308 |
$page_id = $query->queried_object_id; |
| 309 |
elseif (isset($qvars['page_id'])) |
| 310 |
$page_id = $qvars['page_id']; |
| 311 |
|
| 312 |
if (isset($page_id) && $page_id && $this->get_post($page_id, $this->get_post_language($this->page_for_posts)) == $this->page_for_posts) { |
| 313 |
$this->page_for_posts = $page_id; |
| 314 |
$this->curlang = $this->get_post_language($page_id); |
| 315 |
$query->set('lang', $this->curlang->slug); |
| 316 |
$query->is_page = false; |
| 317 |
$query->is_home = true; |
| 318 |
$query->is_posts_page = true; |
| 319 |
$query->is_singular = false; |
| 320 |
} |
| 321 |
} |
| 322 |
|
| 323 |
// FIXME to generalize as I probably forget things |
| 324 |
$is_archive = (count($query->query) == 1 && isset($qvars['paged']) && $qvars['paged']) || |
| 325 |
(isset($qvars['m']) && $qvars['m']) || |
| 326 |
(isset($qvars['author']) && $qvars['author']) || |
| 327 |
(isset($qvars['post_type']) && is_post_type_archive() && in_array($qvars['post_type'], $this->post_types)); |
| 328 |
|
| 329 |
// sets 404 when the language is not set for archives needing the language in the url |
| 330 |
if (!$this->options['hide_default'] && !isset($qvars['lang']) && !$GLOBALS['wp_rewrite']->using_permalinks() && $is_archive) |
| 331 |
$query->set_404(); |
| 332 |
|
| 333 |
// sets the language in case we hide the default language |
| 334 |
if ($this->options['hide_default'] && !isset($qvars['lang']) && ($is_archive || (count($query->query) == 1 && isset($qvars['feed']) && $qvars['feed']) )) |
| 335 |
$query->set('lang', $this->options['default_lang']); |
| 336 |
|
| 337 |
// allow filtering recent posts and secondary queries by the current language |
| 338 |
// take care not to break queries for non visible post types such as nav_menu_items, attachments... |
| 339 |
if (/*$query->is_home && */$this->curlang && (!isset($qvars['post_type']) || in_array($qvars['post_type'], $this->post_types) || |
| 340 |
(is_array($qvars['post_type']) && array_intersect($qvars['post_type'], $this->post_types)) )) |
| 341 |
$query->set('lang', $this->curlang->slug); |
| 342 |
|
| 343 |
// remove pages query when the language is set unless we do a search |
| 344 |
// FIXME is only search broken by this ? |
| 345 |
if (isset($qvars['lang']) && $qvars['lang'] && !isset($qvars['post_type']) && !is_search()) |
| 346 |
$query->set('post_type', 'post'); |
| 347 |
|
| 348 |
// unset the is_archive flag for language pages to prevent loading the archive template |
| 349 |
// keep archive flag for comment feed otherwise the language filter does not work |
| 350 |
if (isset($qvars['lang']) && $qvars['lang'] && !is_comment_feed() && |
| 351 |
!is_post_type_archive() && !is_date() && !is_author() && !is_category() && !is_tag() && !is_tax('post_format')) |
| 352 |
$query->is_archive = false; |
| 353 |
|
| 354 |
// unset the is_tax flag for authors pages and post types archives |
| 355 |
// FIXME Probably I should do this for other cases |
| 356 |
if (isset($qvars['lang']) && $qvars['lang'] && (is_author() || is_post_type_archive())) { |
| 357 |
$query->is_tax = false; |
| 358 |
unset($query->queried_object); |
| 359 |
} |
| 360 |
|
| 361 |
// sets a language for theme preview |
| 362 |
if (isset($_GET['preview'])) |
| 363 |
$query->set('lang', $this->options['default_lang']); |
| 364 |
|
| 365 |
if (PLL_DISPLAY_ALL) { |
| 366 |
// add posts with no language set |
| 367 |
$query->query_vars['tax_query'] = array( |
| 368 |
'relation' => 'OR', array( |
| 369 |
'taxonomy'=> 'language', |
| 370 |
'terms'=> get_terms('language', array('fields'=>'ids')), |
| 371 |
'operator'=>'NOT IN')); |
| 372 |
} |
| 373 |
} |
| 374 |
|
| 375 |
// filter sticky posts by current language |
| 376 |
function option_sticky_posts($posts) { |
| 377 |
if ($this->curlang && !empty($posts)) { |
| 378 |
foreach ($posts as $key=>$post_id) { |
| 379 |
if ($this->get_post_language($post_id)->term_id != $this->curlang->term_id) |
| 380 |
unset($posts[$key]); |
| 381 |
} |
| 382 |
} |
| 383 |
return $posts; |
| 384 |
} |
| 385 |
|
| 386 |
// filters categories and post tags by language when needed |
| 387 |
function terms_clauses($clauses, $taxonomies, $args) { |
| 388 |
// does nothing except on taxonomies which are filterable |
| 389 |
foreach ($taxonomies as $tax) { |
| 390 |
if (!in_array($tax, $this->taxonomies)) |
| 391 |
return $clauses; |
| 392 |
} |
| 393 |
|
| 394 |
// adds our clauses to filter by current language |
| 395 |
return $this->_terms_clauses($clauses, $this->curlang, PLL_DISPLAY_ALL); |
| 396 |
} |
| 397 |
|
| 398 |
// meta in the html head section |
| 399 |
function wp_head() { |
| 400 |
// outputs references to translated pages (if exists) in the html head section |
| 401 |
foreach ($this->get_languages_list() as $language) { |
| 402 |
if ($language->slug != $this->curlang->slug && $url = $this->get_translation_url($language)) |
| 403 |
printf("<link hreflang='%s' href='%s' rel='alternate' />\n", esc_attr($language->slug), esc_url($url)); |
| 404 |
} |
| 405 |
} |
| 406 |
|
| 407 |
// modifies the page link in case the front page is not in the default language |
| 408 |
function page_link($link, $id) { |
| 409 |
if ($this->options['redirect_lang'] && $this->page_on_front && $id == $this->get_post($this->page_on_front, $lang = $this->get_post_language($id))) |
| 410 |
return $this->options['hide_default'] && $lang->slug == $this->options['default_lang'] ? trailingslashit($this->home) : get_term_link($lang, 'language'); |
| 411 |
|
| 412 |
if ($this->page_on_front && $this->options['hide_default'] && $id == $this->get_post($this->page_on_front, $this->options['default_lang'])) |
| 413 |
return trailingslashit($this->home); |
| 414 |
|
| 415 |
return _get_page_link($id); |
| 416 |
} |
| 417 |
|
| 418 |
// prevents redirection of the homepage when using page on front |
| 419 |
function redirect_canonical($redirect_url, $requested_url) { |
| 420 |
return $requested_url == home_url('/') || $requested_url == $this->page_link('', get_option('page_on_front')) ? false : $redirect_url; |
| 421 |
} |
| 422 |
|
| 423 |
// adds some javascript workaround knowing it's not perfect... |
| 424 |
function wp_print_footer_scripts() { |
| 425 |
// modifies the search form since filtering get_search_form won't work if the template uses searchform.php or the search form is hardcoded |
| 426 |
// don't use directly e[0] just in case there is somewhere else an element named 's' |
| 427 |
// check before if the hidden input has not already been introduced by get_search_form |
| 428 |
// thanks to AndyDeGroo for improving the code for compatility with old browsers |
| 429 |
// http://wordpress.org/support/topic/development-of-polylang-version-08?replies=6#post-2645559 |
| 430 |
if (!$this->search_form_filter) { |
| 431 |
$lang = esc_js($this->curlang->slug); |
| 432 |
$js = "e = document.getElementsByName('s'); |
| 433 |
for (i = 0; i < e.length; i++) { |
| 434 |
if (e[i].tagName.toUpperCase() == 'INPUT') { |
| 435 |
var ih = document.createElement('input'); |
| 436 |
ih.type = 'hidden'; |
| 437 |
ih.name = 'lang'; |
| 438 |
ih.value = '$lang'; |
| 439 |
e[i].parentNode.appendChild(ih); |
| 440 |
} |
| 441 |
}"; |
| 442 |
echo "<script type='text/javascript'>" .$js. "</script>"; |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
// adds the language information in the search form |
| 447 |
// does not work if searchform.php is used or if the search form is hardcoded in another template file |
| 448 |
function get_search_form($form) { |
| 449 |
if ($form) { |
| 450 |
$this->search_form_filter = true; |
| 451 |
$form = str_replace('</form>', '<input type="hidden" name="lang" value="'.esc_attr($this->curlang->slug).'" /></form>', $form); |
| 452 |
} |
| 453 |
return $form; |
| 454 |
} |
| 455 |
|
| 456 |
// excludes pages which are not in the current language for wp_list_pages |
| 457 |
// useful for the pages widget |
| 458 |
function wp_list_pages_excludes($pages) { |
| 459 |
return array_merge($pages, $this->exclude_pages($this->curlang->term_id)); |
| 460 |
} |
| 461 |
|
| 462 |
// filters the comments according to the current language mainly for the recent comments widget |
| 463 |
function comments_clauses($clauses, $comment_query) { |
| 464 |
// first test if wp_posts.ID already available in the query |
| 465 |
if (strpos($clauses['join'], '.ID')) { |
| 466 |
global $wpdb; |
| 467 |
$clauses['join'] .= $wpdb->prepare(" INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = ID"); |
| 468 |
$clauses['where'] .= $wpdb->prepare(" AND pll_tr.term_taxonomy_id = %d", $this->curlang->term_taxonomy_id); |
| 469 |
} |
| 470 |
return $clauses; |
| 471 |
} |
| 472 |
|
| 473 |
// modifies the sql request for wp_get_archives an get_adjacent_post to filter by the current language |
| 474 |
function posts_join($sql) { |
| 475 |
global $wpdb; |
| 476 |
return $sql . $wpdb->prepare(" INNER JOIN $wpdb->term_relationships AS pll_tr ON pll_tr.object_id = ID"); |
| 477 |
} |
| 478 |
|
| 479 |
// modifies the sql request for wp_get_archives and get_adjacent_post to filter by the current language |
| 480 |
function posts_where($sql) { |
| 481 |
global $wpdb; |
| 482 |
return $sql . $wpdb->prepare(" AND pll_tr.term_taxonomy_id = %d", $this->curlang->term_taxonomy_id); |
| 483 |
} |
| 484 |
|
| 485 |
// modifies the author and date links to add the language parameter (as well as feed link) |
| 486 |
function archive_link($link) { |
| 487 |
return $this->add_language_to_link($link, $this->curlang); |
| 488 |
} |
| 489 |
|
| 490 |
// returns the url of the translation (if exists) of the current page |
| 491 |
function get_translation_url($language) { |
| 492 |
global $wp_query, $wp_rewrite; |
| 493 |
$qvars = $wp_query->query; |
| 494 |
$hide = $this->options['default_lang'] == $language->slug && $this->options['hide_default']; |
| 495 |
|
| 496 |
// is_single is set to 1 for attachment but no language is set |
| 497 |
if (is_single() && !is_attachment() && $id = $this->get_post($wp_query->queried_object_id, $language)) |
| 498 |
$url = get_permalink($id); |
| 499 |
|
| 500 |
// page for posts |
| 501 |
elseif (get_option('show_on_front') == 'page' && isset($wp_query->queried_object_id) && $wp_query->queried_object_id && |
| 502 |
$wp_query->queried_object_id == $this->page_for_posts && ($id = $this->get_post($this->page_for_posts, $language))) |
| 503 |
$url = get_permalink($id); |
| 504 |
|
| 505 |
elseif (is_page() && $id = $this->get_post($wp_query->queried_object_id, $language)) |
| 506 |
$url = $hide && $id == $this->get_post($this->page_on_front, $language) ? $this->home : get_page_link($id); |
| 507 |
|
| 508 |
elseif (!is_tax('post_format') && !is_tax('language') && (is_category() || is_tag() || is_tax()) ) { |
| 509 |
$term = get_queried_object(); |
| 510 |
$lang = $this->get_term_language($term->term_id); |
| 511 |
$taxonomy = $term->taxonomy; |
| 512 |
|
| 513 |
if ($language->slug == $lang->slug) |
| 514 |
$url = get_term_link($term, $taxonomy); // self link |
| 515 |
elseif ($link_id = $this->get_translation('term', $term->term_id, $language)) |
| 516 |
$url = get_term_link(get_term($link_id, $taxonomy), $taxonomy); |
| 517 |
} |
| 518 |
|
| 519 |
// don't test if there are existing translations before creating the url as it would be very expensive in sql queries |
| 520 |
elseif (is_archive()) { |
| 521 |
if ($wp_rewrite->using_permalinks()) { |
| 522 |
$filters = array('author_link', 'post_type_archive_link', 'year_link', 'month_link', 'day_link'); |
| 523 |
|
| 524 |
// prevents filtering links by current language |
| 525 |
remove_filter('term_link', array(&$this, 'term_link')); // for post format |
| 526 |
foreach ($filters as $filter) |
| 527 |
remove_filter($filter, array(&$this, 'archive_link')); |
| 528 |
|
| 529 |
if (is_author()) |
| 530 |
$url = $this->add_language_to_link(get_author_posts_url(0, $qvars['author_name']), $language); |
| 531 |
|
| 532 |
if (is_year()) |
| 533 |
$url = $this->add_language_to_link(get_year_link($qvars['year']), $language); |
| 534 |
|
| 535 |
if (is_month()) |
| 536 |
$url = $this->add_language_to_link(get_month_link($qvars['year'], $qvars['monthnum']), $language); |
| 537 |
|
| 538 |
if (is_day()) |
| 539 |
$url = $this->add_language_to_link(get_day_link($qvars['year'], $qvars['monthnum'], $qvars['day']), $language); |
| 540 |
|
| 541 |
if (is_post_type_archive()) |
| 542 |
$url = $this->add_language_to_link(get_post_type_archive_link($qvars['post_type']), $language); |
| 543 |
|
| 544 |
if (is_tax('post_format')) |
| 545 |
$url = $this->add_language_to_link(get_post_format_link($qvars['post_format']), $language); |
| 546 |
|
| 547 |
// put our language filters again |
| 548 |
add_filter('term_link', array(&$this, 'term_link'), 10, 3); |
| 549 |
foreach ($filters as $filter) |
| 550 |
add_filter($filter, array(&$this, 'archive_link')); |
| 551 |
} |
| 552 |
else |
| 553 |
$url = $hide ? remove_query_arg('lang') : add_query_arg('lang', $language->slug); |
| 554 |
} |
| 555 |
|
| 556 |
elseif (is_home() || is_tax('language') ) |
| 557 |
$url = $this->get_home_url($language); |
| 558 |
|
| 559 |
return isset($url) ? $url : null; |
| 560 |
} |
| 561 |
|
| 562 |
// filters the nav menus according to the current language when called from get_nav_menu_locations() |
| 563 |
// mainly for Artisteer generated themes |
| 564 |
function nav_menu_locations($menus) { |
| 565 |
if (is_array($menus)) { |
| 566 |
foreach($menus as $location => $menu) { |
| 567 |
$menu_lang = get_option('polylang_nav_menus'); |
| 568 |
if (isset($menu_lang[$location][$this->curlang->slug])) |
| 569 |
$menus[$location] = $menu_lang[$location][$this->curlang->slug]; |
| 570 |
} |
| 571 |
} |
| 572 |
return $menus; |
| 573 |
} |
| 574 |
|
| 575 |
// filters the nav menus according to the current language when called from wp_nav_menus |
| 576 |
function wp_nav_menu_args($args) { |
| 577 |
if (!$args['menu'] && $args['theme_location']) { |
| 578 |
$menu_lang = get_option('polylang_nav_menus'); |
| 579 |
if (isset($menu_lang[$args['theme_location']][$this->curlang->slug])) |
| 580 |
$args['menu'] = $menu_lang[$args['theme_location']][$this->curlang->slug]; |
| 581 |
} |
| 582 |
return $args; |
| 583 |
} |
| 584 |
|
| 585 |
// adds the language switcher at the end of the menu |
| 586 |
function wp_nav_menu_items($items, $args) { |
| 587 |
$menu_lang = get_option('polylang_nav_menus'); |
| 588 |
return isset($args->theme_location) && isset($menu_lang[$args->theme_location]['switcher']) && $menu_lang[$args->theme_location]['switcher'] ? |
| 589 |
$items . $this->the_languages(array_merge($menu_lang[$args->theme_location], array('menu' => 1, 'echo' => 0))) : $items; |
| 590 |
} |
| 591 |
|
| 592 |
// filters the widgets according to the current language |
| 593 |
function widget_display_callback($instance, $widget, $args) { |
| 594 |
$widget_lang = get_option('polylang_widgets'); |
| 595 |
// don't display if a language filter is set and this is not the current one |
| 596 |
return isset($widget_lang[$widget->id]) && $widget_lang[$widget->id] && $widget_lang[$widget->id] != $this->curlang->slug ? false : $instance; |
| 597 |
} |
| 598 |
|
| 599 |
// translates widget titles |
| 600 |
function widget_title($title) { |
| 601 |
return __($title, 'pll_string'); |
| 602 |
} |
| 603 |
|
| 604 |
// translates site title and tagline |
| 605 |
function bloginfo($output, $show) { |
| 606 |
return in_array($show, array('', 'name', 'description')) ? __($output, 'pll_string') : $output; |
| 607 |
} |
| 608 |
|
| 609 |
// translates page for posts and page on front |
| 610 |
function translate_page($value) { |
| 611 |
return isset($this->curlang) && $value ? $this->get_post($value, $this->curlang) : $value; |
| 612 |
} |
| 613 |
|
| 614 |
// filters the home url to get the right language |
| 615 |
function home_url($url) { |
| 616 |
if (!did_action('template_redirect') || rtrim($url,'/') != $this->home) |
| 617 |
return $url; |
| 618 |
|
| 619 |
$theme = get_theme_root(); |
| 620 |
foreach (debug_backtrace() as $trace) { |
| 621 |
$ok = $trace['function'] == 'wp_nav_menu' || |
| 622 |
// direct call from the theme |
| 623 |
(isset($trace['file']) && !strpos($trace['file'], 'searchform.php') && strpos($trace['file'], $theme) !== false && |
| 624 |
in_array($trace['function'], array('home_url', 'bloginfo', 'get_bloginfo')) ); |
| 625 |
|
| 626 |
if ($ok) |
| 627 |
return $this->get_home_url($this->curlang); |
| 628 |
} |
| 629 |
|
| 630 |
return $url; |
| 631 |
} |
| 632 |
|
| 633 |
// returns the home url in the right language |
| 634 |
function get_home_url($language = '') { |
| 635 |
if ($language == '') |
| 636 |
$language = $this->curlang; |
| 637 |
|
| 638 |
if ($this->options['default_lang'] == $language->slug && $this->options['hide_default']) |
| 639 |
return trailingslashit($this->home); |
| 640 |
|
| 641 |
// a static page is used as front page : /!\ don't use get_page_link to avoid infinite loop |
| 642 |
if ($this->page_on_front && $id = $this->get_post($this->page_on_front, $language)) |
| 643 |
return $this->page_link('', $id); |
| 644 |
|
| 645 |
return get_term_link($language, 'language'); |
| 646 |
} |
| 647 |
|
| 648 |
// displays (or returns) the language switcher |
| 649 |
function the_languages($args = '') { |
| 650 |
$defaults = array( |
| 651 |
'dropdown' => 0, // display as list and not as dropdown |
| 652 |
'echo' => 1, // echoes the list |
| 653 |
'hide_if_empty' => 1, // hides languages with no posts (or pages) |
| 654 |
'menu' => '0', // not for nav menu |
| 655 |
'show_flags' => 0, // don't show flags |
| 656 |
'show_names' => 1, // show language names |
| 657 |
'display_names_as' => 'name', // valid options are slug and name |
| 658 |
'force_home' => 0, // tries to find a translation |
| 659 |
'hide_if_no_translation' => 0, // don't hide the link if there is no translation |
| 660 |
'hide_current' => 0, // don't hide current language |
| 661 |
'post_id' => null, // if not null, link to translations of post defined by post_id |
| 662 |
); |
| 663 |
extract(wp_parse_args($args, $defaults)); |
| 664 |
|
| 665 |
if ($dropdown) |
| 666 |
$output = $this->dropdown_languages(array('hide_empty' => $hide_if_empty, 'selected' => $this->curlang->slug)); |
| 667 |
|
| 668 |
else { |
| 669 |
$output = ''; |
| 670 |
|
| 671 |
foreach ($this->get_languages_list($hide_if_empty) as $language) { |
| 672 |
// hide current language |
| 673 |
if ($this->curlang->term_id == $language->term_id && $hide_current) |
| 674 |
continue; |
| 675 |
|
| 676 |
$url = $post_id !== null && ($tr_id = $this->get_post($post_id, $language)) ? get_permalink($tr_id) : |
| 677 |
$post_id === null && !$force_home ? $this->get_translation_url($language) : null; |
| 678 |
|
| 679 |
$url = apply_filters('pll_the_language_link', $url, $language->slug, $language->description); |
| 680 |
|
| 681 |
// hide if no translation exists |
| 682 |
if (!isset($url) && $hide_if_no_translation) |
| 683 |
continue; |
| 684 |
|
| 685 |
$url = isset($url) ? $url : $this->get_home_url($language); // if the page is not translated, link to the home page |
| 686 |
|
| 687 |
$class = 'lang-item lang-item-'.esc_attr($language->term_id); |
| 688 |
$class .= $language->term_id == $this->curlang->term_id ? ' current-lang' : ''; |
| 689 |
$class .= $menu ? ' menu-item' : ''; |
| 690 |
|
| 691 |
$flag = $show_flags ? $this->get_flag($language) : ''; |
| 692 |
$name = $show_names || !$show_flags ? esc_html($display_names_as == 'slug' ? $language->slug : $language->name) : ''; |
| 693 |
|
| 694 |
$output .= sprintf("<li class='%s'><a hreflang='%s' href='%s'>%s</a></li>\n", |
| 695 |
$class, esc_attr($language->slug), esc_url($url), $show_flags && $show_names ? $flag.' '.$name : $flag.$name); |
| 696 |
} |
| 697 |
} |
| 698 |
|
| 699 |
$output = apply_filters('pll_the_languages', $output, $args); |
| 700 |
|
| 701 |
if(!$echo) |
| 702 |
return $output; |
| 703 |
echo $output; |
| 704 |
} |
| 705 |
|
| 706 |
// just returns the current language for API |
| 707 |
function current_language($args) { |
| 708 |
return !isset($this->curlang) ? false : |
| 709 |
$args == 'name' ? $this->curlang->name : |
| 710 |
$args == 'locale' ? $this->curlang->description : |
| 711 |
$this->curlang->slug; |
| 712 |
} |
| 713 |
} |
| 714 |
?> |
| 715 |
|
