polylang / frontend / frontend-filters-search.php

frontend-filters-search.php in Polylang 2.0.3, at frontend/frontend-filters-search.php

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1	<?php
2
3	/**
4	* filters search forms when using permalinks
5	*
6	* @since 1.2
7	*/
8	class PLL_Frontend_Filters_Search {
9	public $links_model, $curlang;
10
11	/**
12	* constructor
13	*
14	* @since 1.2
15	*
16	* @param object $polylang
17	*/
18	public function __construct( &$polylang ) {
19	$this->links_model = &$polylang->links_model;
20	$this->curlang = &$polylang->curlang;
21
22	// adds the language information in the search form
23	// 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
24	add_filter( 'get_search_form', array( $this, 'get_search_form' ), 99 );
25
26	// adds the language information in admin bar search form
27	add_action( 'add_admin_bar_menus', array( $this, 'add_admin_bar_menus' ) );
28
29	// adds javascript at the end of the document
30	// was used for WP < 3.6. kept just in case
31	if ( defined( 'PLL_SEARCH_FORM_JS' ) && PLL_SEARCH_FORM_JS ) {
32	add_action( 'wp_footer', array( $this, 'wp_print_footer_scripts' ) );
33	}
34	}
35
36	/**
37	* adds the language information in the search form
38	* does not work if searchform.php ( prior to WP 3.6 ) is used or if the search form is hardcoded in another template file
39	*
40	* @since 0.1
41	*
42	* @param string $form search form
43	* @return string modified search form
44	*/
45	public function get_search_form( $form ) {
46	if ( $form ) {
47	if ( $this->links_model->using_permalinks ) {
48	// take care to modify only the url in the <form> tag
49	preg_match( '#<form.+>#', $form, $matches );
50	$old = reset( $matches );
51	$new = preg_replace( '#' . esc_url( $this->links_model->home ) . '\/?#', esc_url( $this->curlang->search_url ), $old );
52	$form = str_replace( $old, $new, $form );
53	}
54	else {
55	$form = str_replace( '</form>', '<input type="hidden" name="lang" value="'.esc_attr( $this->curlang->slug ).'" /></form>', $form );
56	}
57	}
58
59	return $form;
60	}
61
62	/**
63	* adds the language information in admin bar search form
64	*
65	* @since 1.2
66	*/
67	function add_admin_bar_menus() {
68	remove_action( 'admin_bar_menu', 'wp_admin_bar_search_menu', 4 );
69	add_action( 'admin_bar_menu', array( $this, 'admin_bar_search_menu' ), 4 );
70	}
71
72	/**
73	* rewrites the admin bar search form to pass our get_search form filter. See #21342
74	* code base is WP 4.3.1
75	*
76	* @since 0.9
77	*
78	* @param object $wp_admin_bar
79	*/
80	public function admin_bar_search_menu( $wp_admin_bar ) {
81	$form = '<form action="' . esc_url( home_url( '/' ) ) . '" method="get" id="adminbarsearch">';
82	$form .= '<input class="adminbar-input" name="s" id="adminbar-search" type="text" value="" maxlength="150" />';
83	$form .= '<label for="adminbar-search" class="screen-reader-text">' . esc_html__( 'Search' ) . '</label>';
84	$form .= '<input type="submit" class="adminbar-button" value="' . esc_attr__( 'Search' ) . '"/>';
85	$form .= '</form>';
86
87	$wp_admin_bar->add_menu( array(
88	'parent' => 'top-secondary',
89	'id' => 'search',
90	'title' => $this->get_search_form( $form ), // pass the get_search_form filter
91	'meta' => array( 'class' => 'admin-bar-search', 'tabindex' => -1 ),
92	) );
93	}
94
95	/**
96	* allows modifying the search form if it does not pass get_search_form
97	*
98	* @since 0.1
99	*/
100	public function wp_print_footer_scripts() {
101	// don't use directly e[0] just in case there is somewhere else an element named 's'
102	// check before if the hidden input has not already been introduced by get_search_form ( FIXME: is there a way to improve this ) ?
103	// thanks to AndyDeGroo for improving the code for compatility with old browsers
104	// http://wordpress.org/support/topic/development-of-polylang-version-08?replies=6#post-2645559
105	$lang = esc_js( $this->curlang->slug );
106	$js = "//<![CDATA[
107	e = document.getElementsByName( 's' );
108	for ( i = 0; i < e.length; i++ ) {
109	if ( e[i].tagName.toUpperCase() == 'INPUT' ) {
110	s = e[i].parentNode.parentNode.children;
111	l = 0;
112	for ( j = 0; j < s.length; j++ ) {
113	if ( s[j].name == 'lang' ) {
114	l = 1;
115	}
116	}
117	if ( l == 0 ) {
118	var ih = document.createElement( 'input' );
119	ih.type = 'hidden';
120	ih.name = 'lang';
121	ih.value = '$lang';
122	e[i].parentNode.appendChild( ih );
123	}
124	}
125	}
126	//]]>";
127	echo '<script type="text/javascript">' . $js . '</script>';
128	}
129	}
130