| 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 $home; |
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private $options; |
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private $page_for_posts; |
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private $page_on_front; |
| 15 |
|
| 16 |
function __construct() { |
| 17 |
|
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// init options often needed |
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$this->options = get_option('polylang'); |
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$this->home = get_option('home'); |
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$this->page_for_posts = get_option('page_for_posts'); |
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$this->page_on_front = get_option('page_on_front'); |
| 23 |
|
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// text domain management |
| 25 |
add_action('init', array(&$this, 'init')); |
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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')); |
| 28 |
|
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// filters posts according to the language |
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add_filter('pre_get_posts', array(&$this, 'pre_get_posts')); |
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} |
| 32 |
|
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// set these filters and actions only once the current language has been defined |
| 34 |
function add_language_filters() { |
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// filters the WordPress locale |
| 36 |
add_filter('locale', array(&$this, 'get_locale')); |
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|
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// filters categories and post tags by language |
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add_filter('terms_clauses', array(&$this, 'terms_clauses'), 10, 3); |
| 40 |
|
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// meta in the html head section |
| 42 |
remove_action('wp_head', 'rel_canonical'); |
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add_action('wp_head', array(&$this, 'wp_head')); |
| 44 |
|
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// prevents redirection of the homepage |
| 46 |
add_filter('redirect_canonical', array(&$this, 'redirect_canonical'), 10, 2); |
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|
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// adds javascript at the end of the document |
| 49 |
add_action('wp_print_footer_scripts', array(&$this, 'wp_print_footer_scripts')); |
| 50 |
|
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// adds the language information in the search form |
| 52 |
// 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 |
| 53 |
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')); |
| 57 |
|
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// filters the comments according to the current language |
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add_filter('comments_clauses', array(&$this, 'comments_clauses'), 10, 2); |
| 60 |
|
| 61 |
// rewrites feed links to filter them by language |
| 62 |
add_filter('feed_link', array(&$this, 'feed_link'), 10, 2); |
| 63 |
|
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// rewrites archives links to filter them by language |
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add_filter('getarchives_join', array(&$this, 'posts_join')); |
| 66 |
add_filter('getarchives_where', array(&$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(&$this, 'archive_link')); |
| 70 |
add_filter('year_link', array(&$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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// 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(&$this, 'wp_nav_menu_args')); |
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add_filter('wp_nav_menu_items', array(&$this, 'wp_nav_menu_items'), 10, 2); |
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add_filter('wp_nav_menu_objects', array(&$this, 'wp_nav_menu_objects'), 10, 2); |
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add_filter('wp_page_menu', array(&$this, 'wp_page_menu'), 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(&$this, 'widget_display_callback'), 10, 3); |
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|
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// strings translation (must be applied before WordPress applies its default formatting filters) |
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add_filter('widget_title', array(&$this, 'widget_title'), 1); |
| 91 |
add_filter('bloginfo', array(&$this,'bloginfo'), 1, 2); |
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|
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// loads front page template on translated front page |
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add_filter('template_include', array(&$this, 'template_include')); |
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|
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// modifies the home url |
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add_filter('home_url', array(&$this, 'home_url')); |
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|
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// allows a new value for the 'show' parameter to display the homepage url according to the current language |
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// FIXME Backward compatibily for versions < 0.5 -> replaced by a filter on home_url |
| 101 |
add_filter('bloginfo_url', array(&$this, 'bloginfo_url'), 10, 2); |
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|
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// Template tag: displays the language switcher |
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// FIXME Backward compatibily for versions < 0.5 -> replaced by pll_the_languages |
| 105 |
add_action('the_languages', array(&$this, 'the_languages')); |
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} |
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|
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// returns the language according to browser preference or the default language |
| 109 |
function get_preferred_language() { |
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// check first is the user was already browsing this site |
| 111 |
if (isset($_COOKIE['wordpress_polylang'])) |
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return $this->get_language($_COOKIE['wordpress_polylang']); |
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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 |
| 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($accept_langs, SORT_NUMERIC); // sort list based on value |
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} |
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} |
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|
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// looks through sorted list and use first one that matches our language list |
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$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 = $language; |
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} |
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} |
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} |
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} // options['browser'] |
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|
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// return default if there is no preferences in the browser or preferences does not match our languages or it is requested not to use the browser preference |
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return isset($pref_lang) ? $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()) |
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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() && $var = get_queried_object_id()) |
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$lang = $this->get_post_language($var); |
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|
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else { |
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foreach (get_taxonomies(array('show_ui'=>true)) 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, $taxonomy); |
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} |
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} |
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|
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return (isset($lang)) ? $lang : false; |
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} |
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|
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// save the default locale before we start any language manipulation |
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function init() { |
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$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 $this->curlang->description; |
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} |
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|
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// saves all text domains in a table for later usage |
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function mofile($bool, $domain, $mofile) { |
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$this->list_textdomains[] = array ('mo' => $mofile, 'domain' => $domain); |
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return true; // prevents WP loading text domains as we will load them all later |
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} |
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|
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// NOTE: I believe there are two ways for a plugin to force the WP language |
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// as done by xili_language and here: load text domains and reinitialize wp_locale with the action 'wp' |
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// as done by qtranslate: define the locale with the action 'plugins_loaded', but in this case, the language must be specified in the url. |
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function load_textdomains() { |
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// sets the current language |
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if (!($this->curlang = $this->get_current_language())) |
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return; // something went wrong |
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|
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// set a cookie to remember the language and then set all our language filters and actions |
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setcookie('wordpress_polylang', $this->curlang->slug, time() + 31536000 /* 1 year */, COOKIEPATH, COOKIE_DOMAIN); |
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$this->add_language_filters(); |
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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 |
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remove_filter('override_load_textdomain', array(&$this, 'mofile')); |
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|
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// now we can load text domains with the right language |
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$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 $l10n; |
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$mo = new MO(); |
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$reader = new POMO_StringReader(base64_decode(get_option('polylang_mo'.$this->curlang->term_id))); |
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$mo->import_from_reader($reader); |
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$l10n['pll_string'] = &$mo; |
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|
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// reinitializes wp_locale for weekdays and months |
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global $wp_locale; |
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$wp_locale->init(); |
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} |
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|
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// filters posts according to the language |
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function pre_get_posts($query) { |
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global $wp_rewrite; |
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$qvars = $query->query_vars; |
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|
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// detect our exclude pages query and returns to avoid conflicts |
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// this test should be sufficient |
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if (isset($qvars['tax_query'][0]) && isset($qvars['tax_query'][0]['taxonomy']) && isset($qvars['tax_query'][0]['operator'])) |
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return; |
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|
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// homepage is requested, let's set the language |
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if (empty($query->query)) { |
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// find out the language |
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if ($this->options['hide_default'] && isset($_COOKIE['wordpress_polylang'])) |
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$this->curlang = $this->get_language($this->options['default_lang']); |
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else |
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$this->curlang = $this->get_preferred_language(); // sets the language according to browser preference or default language |
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|
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// we are already on the right page |
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if ($this->options['default_lang'] == $this->curlang->slug && $this->options['hide_default']) { |
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if ($this->page_on_front && $link_id = $this->get_post($this->page_on_front, $this->curlang)) |
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$query->set('page_id', $link_id); |
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else |
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$query->set('lang', $this->curlang->slug); |
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} |
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// redirect to the home page in the right language |
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else { |
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if ($this->page_on_front && $link_id = $this->get_post($this->page_on_front, $this->curlang)) |
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$url = _get_page_link($link_id); |
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else |
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$url = home_url('?lang='.$this->curlang->slug); |
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|
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wp_redirect($url); |
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exit; |
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} |
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} |
| 258 |
|
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// sets is_home on translated home page when it displays posts |
| 260 |
if (!$this->page_on_front && $query->is_tax && count($query->query) == 1) { |
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$query->is_home = true; |
| 262 |
$query->is_tax = false; |
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} |
| 264 |
|
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// sets the language for posts page in case the front page displays a static page |
| 266 |
if ($this->page_for_posts) { |
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// If permalinks are used, WordPress does set and use $query->queried_object_id and sets $query->query_vars['page_id'] to 0 |
| 268 |
// and does set and use $query->query_vars['page_id'] if permalinks are not used :( |
| 269 |
if (isset($query->queried_object_id)) |
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$page_id = $query->queried_object_id; |
| 271 |
elseif (isset($qvars['page_id'])) |
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$page_id = $qvars['page_id']; |
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|
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if (isset($page_id) && $page_id && $this->get_post($page_id, $this->get_post_language($this->page_for_posts)) == $this->page_for_posts) { |
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$query->set('lang',$this->get_post_language($page_id)->slug); |
| 276 |
$query->queried_object_id = $this->page_for_posts; |
| 277 |
$query->query_vars['page_id'] = $this->page_for_posts; // FIXME the trick works but breaks .current-menu-item and .current_page_item |
| 278 |
$query->is_page = false; |
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$query->is_home = true; |
| 280 |
$query->is_posts_page = true; |
| 281 |
$query->is_singular = false; |
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} |
| 283 |
} |
| 284 |
|
| 285 |
// FIXME to generalize as I probably forget things |
| 286 |
// sets the language in case we hide the default language |
| 287 |
if ($this->options['hide_default'] && !isset($qvars['lang']) && ( |
| 288 |
(count($query->query) == 1 && isset($qvars['paged']) && $qvars['paged']) || |
| 289 |
isset($qvars['m']) && $qvars['m'] || |
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isset($qvars['feed']) && $qvars['feed'] || |
| 291 |
isset($qvars['author']) && $qvars['author'])) |
| 292 |
$query->set('lang', $this->options['default_lang']); |
| 293 |
|
| 294 |
// allow filtering recent posts by the current language |
| 295 |
// take care not to break queries for non visible post types such as nav_menu_items, attachments... |
| 296 |
if ($query->is_home && $this->curlang && (!isset($qvars['post_type']) || !in_array($qvars['post_type'], get_post_types(array('show_ui' => false))))) |
| 297 |
$query->set('lang', $this->curlang->slug); |
| 298 |
|
| 299 |
// remove pages query when the language is set unless we do a search |
| 300 |
// FIXME is only search broken by this ? |
| 301 |
if (isset($qvars['lang']) && $qvars['lang'] && !isset($qvars['post_type']) && !is_search()) |
| 302 |
$query->set('post_type', 'post'); |
| 303 |
|
| 304 |
// unset the is_archive flag for language pages to prevent loading the archive template |
| 305 |
// keep archive flag for comment feed otherwise the language filter does not work |
| 306 |
if (isset($qvars['lang']) && $qvars['lang'] && !is_post_type_archive() && !is_date() && !is_author() && !is_category() && !is_tag() && !is_comment_feed()) |
| 307 |
$query->is_archive = false; |
| 308 |
|
| 309 |
// unset the is_tax flag for authors pages |
| 310 |
// FIXME Probably I should do this for other cases |
| 311 |
if (isset($qvars['lang']) && $qvars['lang'] && is_author()) |
| 312 |
$query->is_tax = false; |
| 313 |
|
| 314 |
// sets a language for theme preview |
| 315 |
if (isset($_GET['preview'])) |
| 316 |
$query->set('lang', $this->options['default_lang']); |
| 317 |
|
| 318 |
if (PLL_DISPLAY_ALL) { |
| 319 |
// add posts with no language set |
| 320 |
$query->query_vars['tax_query'] = array( |
| 321 |
'relation' => 'OR', array( |
| 322 |
'taxonomy'=> 'language', |
| 323 |
'terms'=> get_terms('language', array('fields'=>'ids')), |
| 324 |
'operator'=>'NOT IN')); |
| 325 |
} |
| 326 |
} |
| 327 |
|
| 328 |
// filters categories and post tags by language when needed |
| 329 |
function terms_clauses($clauses, $taxonomies, $args) { |
| 330 |
// does nothing except on taxonomies which have show_ui set to 1 (includes category and post_tags) |
| 331 |
foreach ($taxonomies as $tax) { |
| 332 |
if(!get_taxonomy($tax)->show_ui) |
| 333 |
return $clauses; |
| 334 |
} |
| 335 |
|
| 336 |
// adds our clauses to filter by current language |
| 337 |
return $this->_terms_clauses($clauses, $this->curlang, PLL_DISPLAY_ALL); |
| 338 |
} |
| 339 |
|
| 340 |
// meta in the html head section |
| 341 |
function wp_head() { |
| 342 |
// modifies the canonical link to the homepage |
| 343 |
if (is_singular()) { |
| 344 |
global $wp_the_query; |
| 345 |
if ($id = $wp_the_query->get_queried_object_id()) { |
| 346 |
if (is_page()) |
| 347 |
$link = _get_page_link($id); // ignores page_on_front unlike get_permalink |
| 348 |
else |
| 349 |
$link = get_permalink ($id); |
| 350 |
echo "<link rel='canonical' href='$link' />\n"; |
| 351 |
} |
| 352 |
} |
| 353 |
|
| 354 |
// outputs references to translated pages (if exists) in the html head section |
| 355 |
foreach ($this->get_languages_list() as $language) { |
| 356 |
if ($language->slug != $this->curlang->slug && $url = $this->get_translation_url($language)) |
| 357 |
printf("<link hreflang='%s' href='%s' rel='alternate' />\n", esc_attr($language->slug), esc_url($url)); |
| 358 |
} |
| 359 |
} |
| 360 |
|
| 361 |
// prevents redirection of the homepage |
| 362 |
function redirect_canonical($redirect_url, $requested_url) { |
| 363 |
return $requested_url == _get_page_link($this->page_on_front) ? false : $redirect_url; |
| 364 |
} |
| 365 |
|
| 366 |
// adds some javascript workaround knowing it's not perfect... |
| 367 |
function wp_print_footer_scripts() { |
| 368 |
$js = ''; |
| 369 |
|
| 370 |
// modifies the search form since filtering get_search_form won't work if the template uses searchform.php |
| 371 |
// don't use directly e[0] just in case there is somewhere else an element named 's' |
| 372 |
// check before if the hidden input has not already been introduced by get_search_form |
| 373 |
if (!$this->search_form_filter) { |
| 374 |
$lang = esc_js($this->curlang->slug); |
| 375 |
$js .= "e = document.getElementsByName('s'); |
| 376 |
for (i = 0; i < e.length; i++) { |
| 377 |
if (e[i] == '[object HTMLInputElement]') { |
| 378 |
var ih = document.createElement('input'); |
| 379 |
ih.type = 'hidden'; |
| 380 |
ih.name = 'lang'; |
| 381 |
ih.value = '$lang'; |
| 382 |
e[i].parentNode.appendChild(ih); |
| 383 |
} |
| 384 |
}"; |
| 385 |
} |
| 386 |
|
| 387 |
if ($js) |
| 388 |
echo "<script type='text/javascript'>" .$js. "</script>"; |
| 389 |
} |
| 390 |
|
| 391 |
// adds the language information in the search form |
| 392 |
// does not work if searchform.php is used |
| 393 |
function get_search_form($form) { |
| 394 |
if ($form) { |
| 395 |
$this->search_form_filter = true; |
| 396 |
$form = str_replace('</form>', '<input type="hidden" name="lang" value="'.esc_attr($this->curlang->slug).'" /></form>', $form); |
| 397 |
} |
| 398 |
return $form; |
| 399 |
} |
| 400 |
|
| 401 |
// excludes pages which are not in the current language for wp_list_pages |
| 402 |
// useful for the pages widget |
| 403 |
function wp_list_pages_excludes($pages) { |
| 404 |
return array_merge($pages, $this->exclude_pages($this->curlang->term_id)); |
| 405 |
} |
| 406 |
|
| 407 |
// filters the comments according to the current language mainly for the recent comments widget |
| 408 |
function comments_clauses($clauses, $comment_query) { |
| 409 |
// first test if wp_posts.ID already available in the query |
| 410 |
if (strpos($clauses['join'], '.ID')) { |
| 411 |
global $wpdb; |
| 412 |
$clauses['join'] .= $wpdb->prepare(" INNER JOIN $wpdb->term_relationships AS tr ON tr.object_id = ID"); |
| 413 |
$clauses['where'] .= $wpdb->prepare(" AND tr.term_taxonomy_id = %d", $this->curlang->term_taxonomy_id); |
| 414 |
} |
| 415 |
return $clauses; |
| 416 |
} |
| 417 |
|
| 418 |
// adds language information to a link when using pretty permalinks |
| 419 |
function add_language_to_link($url) { |
| 420 |
$base = $this->options['rewrite'] ? '/' : '/language/'; |
| 421 |
$slug = $this->options['default_lang'] == $this->curlang->slug && $this->options['hide_default'] ? '' : $base.$this->curlang->slug; |
| 422 |
return esc_url(str_replace($this->home, $this->home.$slug, $url)); |
| 423 |
} |
| 424 |
|
| 425 |
// Modifies the feed link to add the language parameter |
| 426 |
function feed_link($url, $feed) { |
| 427 |
return $GLOBALS['wp_rewrite']->using_permalinks() ? $this->add_language_to_link($url) : esc_url(home_url('?lang='.$this->curlang->slug.'&feed='.$feed)); |
| 428 |
} |
| 429 |
|
| 430 |
// modifies the sql request for wp_get_archives an get_adjacent_post to filter by the current language |
| 431 |
function posts_join($sql) { |
| 432 |
return $sql . $GLOBALS['wpdb']->prepare(" INNER JOIN $wpdb->term_relationships ON object_id = ID"); |
| 433 |
} |
| 434 |
|
| 435 |
// modifies the sql request for wp_get_archives and get_adjacent_post to filter by the current language |
| 436 |
function posts_where($sql) { |
| 437 |
return $sql . $GLOBALS['wpdb']->prepare(" AND term_taxonomy_id = %d", $this->curlang->term_taxonomy_id); |
| 438 |
} |
| 439 |
|
| 440 |
// modifies the author and date links to add the language parameter |
| 441 |
function archive_link($link) { |
| 442 |
return $GLOBALS['wp_rewrite']->using_permalinks() ? |
| 443 |
$this->add_language_to_link($link) : |
| 444 |
esc_url(str_replace($this->home.'/?', $this->home.'/?lang='.$this->curlang->slug.'&', $link)); |
| 445 |
} |
| 446 |
|
| 447 |
// returns the url of the translation (if exists) of the current page |
| 448 |
function get_translation_url($language) { |
| 449 |
global $wp_query, $wp_rewrite; |
| 450 |
$qvars = $wp_query->query; |
| 451 |
$hide = $this->options['default_lang'] == $language->slug && $this->options['hide_default']; |
| 452 |
|
| 453 |
// is_single is set to 1 for attachment but no language is set |
| 454 |
if (is_single() && !is_attachment() && $id = $this->get_post($wp_query->queried_object_id, $language)) |
| 455 |
$url = get_permalink($id); |
| 456 |
|
| 457 |
// page for posts |
| 458 |
elseif (get_option('show_on_front') == 'page' && isset($wp_query->queried_object_id) && $wp_query->queried_object_id == $this->page_for_posts) |
| 459 |
$url = get_permalink($this->get_post($this->page_for_posts, $language)); |
| 460 |
|
| 461 |
elseif (is_page() && $id = $this->get_post($wp_query->queried_object_id, $language)) |
| 462 |
$url = $hide && $id == $this->get_post($this->page_on_front, $language) ? $this->home : _get_page_link($id); |
| 463 |
|
| 464 |
elseif ( !is_tax('language') && (is_category() || is_tag() || is_tax ()) ) { |
| 465 |
$term = get_queried_object(); |
| 466 |
$lang = $this->get_term_language($term->term_id); |
| 467 |
$taxonomy = $term->taxonomy; |
| 468 |
|
| 469 |
if ($language->slug == $lang->slug) |
| 470 |
$url = get_term_link($term, $taxonomy); // self link |
| 471 |
elseif ($link_id = $this->get_translation('term', $term->term_id, $language)) |
| 472 |
$url = get_term_link(get_term($link_id, $taxonomy), $taxonomy); |
| 473 |
} |
| 474 |
|
| 475 |
// don't test if there are existing translations before creating the url as it would be very expensive in sql queries |
| 476 |
elseif(is_archive()) { |
| 477 |
if ($wp_rewrite->using_permalinks()) { |
| 478 |
$base = $this->options['rewrite'] ? '/' : '/language/'; |
| 479 |
$base = $hide ? '' : $base.$language->slug; |
| 480 |
$base = $this->home.$base.'/'; |
| 481 |
|
| 482 |
if (is_author()) |
| 483 |
$url = esc_url($base.'author/'.$qvars['author_name'].'/'); |
| 484 |
|
| 485 |
if (is_year()) |
| 486 |
$url = esc_url($base.$qvars['year'].'/'); |
| 487 |
|
| 488 |
if (is_month()) |
| 489 |
$url = esc_url($base.$qvars['year'].'/'.$qvars['monthnum'].'/'); |
| 490 |
|
| 491 |
if (is_day()) |
| 492 |
$url = esc_url($base.$qvars['year'].'/'.$qvars['monthnum'].'/'.$qvars['day'].'/'); |
| 493 |
} |
| 494 |
else |
| 495 |
$url = $hide ? remove_query_arg('lang') : add_query_arg('lang', $language->slug); |
| 496 |
} |
| 497 |
|
| 498 |
elseif (is_home() || is_tax('language') ) |
| 499 |
$url = $hide ? $this->home : get_term_link($language, 'language'); |
| 500 |
|
| 501 |
return isset($url) ? $url : null; |
| 502 |
} |
| 503 |
|
| 504 |
// filters the nav menus according to the current language |
| 505 |
function wp_nav_menu_args($args) { |
| 506 |
if (!$args['menu'] && $args['theme_location']) { |
| 507 |
$menu_lang = get_option('polylang_nav_menus'); |
| 508 |
$args['menu'] = $menu_lang[$args['theme_location']][$this->curlang->slug]; |
| 509 |
} |
| 510 |
return $args; |
| 511 |
} |
| 512 |
|
| 513 |
// filters the widgets according to the current language |
| 514 |
function widget_display_callback($instance, $widget, $args) { |
| 515 |
$widget_lang = get_option('polylang_widgets'); |
| 516 |
// don't display if a language filter is set and this is not the current one |
| 517 |
return isset($widget_lang[$widget->id]) && $widget_lang[$widget->id] && $widget_lang[$widget->id] != $this->curlang->slug ? false : $instance; |
| 518 |
} |
| 519 |
|
| 520 |
// adds the language switcher at the end of the menu |
| 521 |
function wp_nav_menu_items($items, $args) { |
| 522 |
$menu_lang = get_option('polylang_nav_menus'); |
| 523 |
return $menu_lang[$args->theme_location]['switcher'] ? |
| 524 |
$items . $this->the_languages(array( |
| 525 |
'menu' => 1, |
| 526 |
'show_names' => $menu_lang[$args->theme_location]['show_names'], |
| 527 |
'show_flags' => $menu_lang[$args->theme_location]['show_flags'], |
| 528 |
'force_home' => $menu_lang[$args->theme_location]['force_home'], |
| 529 |
'echo' => 0)) : |
| 530 |
$items; |
| 531 |
} |
| 532 |
|
| 533 |
// corrects some issues on front page and post pages nav menus items |
| 534 |
function wp_nav_menu_objects($menu_items, $args) { |
| 535 |
global $wp_query; |
| 536 |
|
| 537 |
// corrects classes in the menu for posts page |
| 538 |
// FIXME check for child pages |
| 539 |
if ($wp_query->is_posts_page) { |
| 540 |
$classes = array('current-menu-item', 'current_page_item', 'current_page_parent'); |
| 541 |
foreach($menu_items as $item) { |
| 542 |
$item->classes = array_diff($item->classes, $classes); |
| 543 |
if ($item->object_id == $this->get_post($this->page_for_posts, $this->curlang)) |
| 544 |
$item->classes = array_merge($item->classes, $classes); |
| 545 |
} |
| 546 |
} |
| 547 |
|
| 548 |
foreach($menu_items as $item) { |
| 549 |
if ($item->object == 'page') |
| 550 |
$item->url = _get_page_link($item->object_id); // avoids bad link on translated front page |
| 551 |
} |
| 552 |
|
| 553 |
return $menu_items; |
| 554 |
} |
| 555 |
|
| 556 |
// corrects the output of the function for translated home |
| 557 |
function wp_page_menu($menu, $args) { |
| 558 |
global $wp_query; |
| 559 |
|
| 560 |
// add current_page_item class to posts page |
| 561 |
if ($wp_query->is_posts_page) { |
| 562 |
$id = $this->get_post($this->page_for_posts, $this->curlang); |
| 563 |
$menu = str_replace('<li class="page_item page-item-'.$id.'">', '<li class="page_item page-item-'.$id.' current_page_item">', $menu); |
| 564 |
} |
| 565 |
|
| 566 |
// add current_page_item class to home page |
| 567 |
// normally only the homepage has no class. note the space in <li > |
| 568 |
if ($this->is_front_page() && !is_paged()) |
| 569 |
$menu = str_replace('<li >', '<li class="current_page_item">', $menu); |
| 570 |
|
| 571 |
// remove the 2nd occurrence of homepage (when translated) |
| 572 |
if ($this->page_on_front) { |
| 573 |
$id = $this->get_post($this->page_on_front, $this->curlang); |
| 574 |
$url = _get_page_link($id); |
| 575 |
$title = apply_filters( 'the_title', get_page($id)->post_title); |
| 576 |
$menu = str_replace('<li class="page_item page-item-'.$id.'"><a href="'.$url.'">'.$title.'</a></li>', '', $menu); |
| 577 |
$menu = str_replace('<li class="page_item page-item-'.$id.' current_page_item"><a href="'.$url.'">'.$title.'</a></li>', '', $menu); |
| 578 |
} |
| 579 |
return $menu; |
| 580 |
} |
| 581 |
|
| 582 |
// translates widget titles |
| 583 |
function widget_title($title) { |
| 584 |
return __($title, 'pll_string'); |
| 585 |
} |
| 586 |
|
| 587 |
// translates site title and tagline |
| 588 |
function bloginfo($output, $show) { |
| 589 |
return in_array($show, array('', 'name', 'description')) ? __($output, 'pll_string') : $output; |
| 590 |
} |
| 591 |
|
| 592 |
// acts as is_front_page but knows about translated front page |
| 593 |
function is_front_page() { |
| 594 |
if ('posts' == get_option('show_on_front') && is_home()) |
| 595 |
return true; |
| 596 |
elseif ('page' == get_option('show_on_front') && $this->page_on_front && is_page($this->get_post($this->page_on_front, $this->get_current_language()))) |
| 597 |
return true; |
| 598 |
elseif(is_tax('language')) |
| 599 |
return true; |
| 600 |
else |
| 601 |
return false; |
| 602 |
} |
| 603 |
|
| 604 |
// loads front page template on translated front page |
| 605 |
function template_include($template) { |
| 606 |
return ($this->is_front_page() && $front_page = get_front_page_template()) ? $front_page : $template; |
| 607 |
} |
| 608 |
|
| 609 |
// filters the home url to get the right language |
| 610 |
function home_url($url) { |
| 611 |
if ( !(did_action('template_redirect') && rtrim($url,'/') == rtrim($this->home,'/')) ) |
| 612 |
return $url; |
| 613 |
|
| 614 |
// don't like this but at least for WP_Widget_Categories::widget, it seems to be the only solution |
| 615 |
// FIXME are there other exceptions ? |
| 616 |
foreach (debug_backtrace() as $trace) { |
| 617 |
$exceptions = $trace['function'] == 'get_pagenum_link' || |
| 618 |
$trace['function'] == 'get_author_posts_url' || |
| 619 |
$trace['function'] == 'get_search_form' || |
| 620 |
(isset($trace['file']) && strpos($trace['file'], 'searchform.php')) || |
| 621 |
($trace['function'] == 'widget' && $trace['class'] == 'WP_Widget_Categories'); |
| 622 |
if ($exceptions) |
| 623 |
return $url; |
| 624 |
} |
| 625 |
return $this->get_home_url($this->curlang); |
| 626 |
} |
| 627 |
|
| 628 |
// returns the home url in the right language |
| 629 |
function get_home_url($language) { |
| 630 |
if ($this->options['default_lang'] == $language->slug && $this->options['hide_default']) |
| 631 |
return trailingslashit($this->home); |
| 632 |
|
| 633 |
// a static page is used as front page |
| 634 |
if ($this->page_on_front && $id = $this->get_post($this->page_on_front, $language)) |
| 635 |
$url = _get_page_link($id); |
| 636 |
|
| 637 |
return isset($url) ? $url : get_term_link($language, 'language'); |
| 638 |
} |
| 639 |
|
| 640 |
// adds 'lang_url' as possible value to the 'show' parameter of bloginfo to display the home url in the correct language |
| 641 |
// FIXME not tested |
| 642 |
function bloginfo_url($output, $show) { |
| 643 |
if ($show == 'lang_url') { |
| 644 |
$url = $this->get_home_url($this->curlang); |
| 645 |
$output = isset($url) ? $url : $this->home; |
| 646 |
} |
| 647 |
return $output; |
| 648 |
} |
| 649 |
|
| 650 |
// displays the language switcher |
| 651 |
function the_languages($args = '') { |
| 652 |
$defaults = array( |
| 653 |
'dropdown' => 0, // display as list and not as dropdown |
| 654 |
'echo' => 1, // echoes the list |
| 655 |
'hide_if_empty' => 1, // hides languages with no posts (or pages) |
| 656 |
'menu' => '0', // not for nav menu |
| 657 |
'show_flags' => 0, // don't show flags |
| 658 |
'show_names' => 1, // show language names |
| 659 |
'force_home' => 0, // tries to find a translation (available only if display != dropdown) |
| 660 |
'hide_if_no_translation' => 0, // don't hide the link if there is no translation |
| 661 |
'hide_current' => 0, // don't hide current language |
| 662 |
); |
| 663 |
extract(wp_parse_args($args, $defaults)); |
| 664 |
|
| 665 |
$output = ''; |
| 666 |
$listlanguages = $this->get_languages_list($hide_if_empty); |
| 667 |
|
| 668 |
foreach ($listlanguages as $language) { |
| 669 |
if ($dropdown) { |
| 670 |
$output .= sprintf("<option value='%s'%s>%s</option>\n", |
| 671 |
esc_attr($language->slug), |
| 672 |
$language->term_id == $this->curlang->term_id ? ' selected="selected"' : '', |
| 673 |
esc_html($language->name) |
| 674 |
); |
| 675 |
} |
| 676 |
else { |
| 677 |
// hide current language |
| 678 |
if ($this->curlang->term_id == $language->term_id && $hide_current) |
| 679 |
continue; |
| 680 |
|
| 681 |
$url = $force_home ? null : $this->get_translation_url($language); |
| 682 |
|
| 683 |
// hide if no translation exists |
| 684 |
if (!isset($url) && $hide_if_no_translation) |
| 685 |
continue; |
| 686 |
|
| 687 |
$url = isset($url) ? $url : $this->get_home_url($language); // if the page is not translated, link to the home page |
| 688 |
|
| 689 |
$class = 'lang-item lang-item-'.esc_attr($language->term_id); |
| 690 |
$class .= $language->term_id == $this->curlang->term_id ? ' current-lang' : ''; |
| 691 |
$class .= $menu ? ' menu-item' : ''; |
| 692 |
|
| 693 |
$flag = $show_flags ? $this->get_flag($language) : ''; |
| 694 |
$name = $show_names || !$show_flags ? esc_html($language->name) : ''; |
| 695 |
|
| 696 |
$output .= '<li class="'.$class.'"><a href="'.esc_url($url).'">'.($show_flags && $show_names ? $flag.' '.$name : $flag.$name)."</a></li>\n"; |
| 697 |
} |
| 698 |
} |
| 699 |
|
| 700 |
$output = $dropdown ? "<select name='lang_choice' id='lang_choice'>\n" . $output . "</select>\n" : $output; |
| 701 |
|
| 702 |
if ($echo) |
| 703 |
echo $output; |
| 704 |
else |
| 705 |
return $output; |
| 706 |
} |
| 707 |
} |
| 708 |
?> |
| 709 |
|
