polylang / include / widget-languages.php

widget-languages.php in Polylang 2.8, at include/widget-languages.php

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1	<?php
2	/**
3	* @package Polylang
4	*/
5
6	/**
7	* The language switcher widget
8	*
9	* @since 0.1
10	*/
11	class PLL_Widget_Languages extends WP_Widget {
12
13	/**
14	* Constructor
15	*
16	* @since 0.1
17	*/
18	public function __construct() {
19	parent::__construct(
20	'polylang',
21	__( 'Language switcher', 'polylang' ),
22	array(
23	'description' => __( 'Displays a language switcher', 'polylang' ),
24	'customize_selective_refresh' => true,
25	)
26	);
27	}
28
29	/**
30	* Displays the widget
31	*
32	* @since 0.1
33	*
34	* @param array $args Display arguments including before_title, after_title, before_widget, and after_widget.
35	* @param array $instance The settings for the particular instance of the widget
36	*/
37	public function widget( $args, $instance ) {
38	// Sets a unique id for dropdown
39	$instance['dropdown'] = empty( $instance['dropdown'] ) ? 0 : $args['widget_id'];
40
41	if ( $list = pll_the_languages( array_merge( $instance, array( 'echo' => 0 ) ) ) ) {
42	$title = empty( $instance['title'] ) ? '' : $instance['title'];
43	/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
44	$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );
45
46	echo $args['before_widget']; // phpcs:ignore WordPress.Security.EscapeOutput
47	if ( $title ) {
48	echo $args['before_title'] . $title . $args['after_title']; // phpcs:ignore WordPress.Security.EscapeOutput
49	}
50	if ( $instance['dropdown'] ) {
51	echo '<label class="screen-reader-text" for="' . esc_attr( 'lang_choice_' . $instance['dropdown'] ) . '">' . esc_html__( 'Choose a language', 'polylang' ) . '</label>';
52	echo $list; // phpcs:ignore WordPress.Security.EscapeOutput
53	} else {
54	echo "<ul>\n" . $list . "</ul>\n"; // phpcs:ignore WordPress.Security.EscapeOutput
55	}
56	echo $args['after_widget']; // phpcs:ignore WordPress.Security.EscapeOutput
57	}
58	}
59
60	/**
61	* Updates the widget options
62	*
63	* @since 0.4
64	*
65	* @param array $new_instance New settings for this instance as input by the user via form()
66	* @param array $old_instance Old settings for this instance
67	* @return array Settings to save or bool false to cancel saving
68	*/
69	public function update( $new_instance, $old_instance ) {
70	$instance = array( 'title' => sanitize_text_field( $new_instance['title'] ) );
71	foreach ( array_keys( PLL_Switcher::get_switcher_options( 'widget' ) ) as $key ) {
72	$instance[ $key ] = ! empty( $new_instance[ $key ] ) ? 1 : 0;
73	}
74
75	return $instance;
76	}
77
78	/**
79	* Displays the widget form
80	*
81	* @since 0.4
82	*
83	* @param array $instance Current settings
84	*/
85	public function form( $instance ) {
86	// Default values
87	$instance = wp_parse_args( (array) $instance, array_merge( array( 'title' => '' ), PLL_Switcher::get_switcher_options( 'widget', 'default' ) ) );
88
89	// Title
90	printf(
91	'<p><label for="%1$s">%2$s</label><input class="widefat" id="%1$s" name="%3$s" type="text" value="%4$s" /></p>',
92	esc_attr( $this->get_field_id( 'title' ) ),
93	esc_html__( 'Title:', 'polylang' ),
94	esc_attr( $this->get_field_name( 'title' ) ),
95	esc_attr( $instance['title'] )
96	);
97
98	foreach ( PLL_Switcher::get_switcher_options( 'widget' ) as $key => $str ) {
99	printf(
100	'<div%5$s%6$s><input type="checkbox" class="checkbox %7$s" id="%1$s" name="%2$s"%3$s /><label for="%1$s">%4$s</label></div>',
101	esc_attr( $this->get_field_id( $key ) ),
102	esc_attr( $this->get_field_name( $key ) ),
103	checked( $instance[ $key ], true, false ),
104	esc_html( $str ),
105	in_array( $key, array( 'show_names', 'show_flags', 'hide_current' ) ) ? sprintf( ' class="no-dropdown-%s"', esc_attr( $this->id ) ) : '',
106	( ! empty( $instance['dropdown'] ) && in_array( $key, array( 'show_names', 'show_flags', 'hide_current' ) ) ? ' style="display:none;"' : '' ),
107	esc_attr( 'pll-' . $key )
108	);
109	}
110
111	// FIXME echoing script in form is not very clean
112	// but it does not work if enqueued properly :
113	// clicking save on a widget makes this code unreachable for the just saved widget ( ?! )
114	$this->admin_print_script();
115	}
116
117	/**
118	* Add javascript to control the language switcher options
119	*
120	* @since 1.3
121	*/
122	public function admin_print_script() {
123	static $done = false;
124
125	if ( $done ) {
126	return;
127	}
128
129	$done = true;
130	?>
131	<script type='text/javascript'>
132	//<![CDATA[
133	jQuery( document ).ready( function( $ ) {
134	function pll_toggle( a, test ) {
135	test ? a.show() : a.hide();
136	}
137
138	// Remove all options if dropdown is checked
139	$( '.widgets-sortables,.control-section-sidebar' ).on( 'change', '.pll-dropdown', function() {
140	var this_id = $( this ).parent().parent().parent().children( '.widget-id' ).attr( 'value' );
141	pll_toggle( $( '.no-dropdown-' + this_id ), true != $( this ).prop( 'checked' ) );
142	} );
143
144	// Disallow unchecking both show names and show flags
145	var options = ['-show_flags', '-show_names'];
146	$.each( options, function( i, v ) {
147	$( '.widgets-sortables,.control-section-sidebar' ).on( 'change', '.pll' + v, function() {
148	var this_id = $( this ).parent().parent().parent().children( '.widget-id' ).attr( 'value' );
149	if ( true != $( this ).prop( 'checked' ) ) {
150	$( '#widget-' + this_id + options[ 1-i ] ).prop( 'checked', true );
151	}
152	} );
153	} );
154	} );
155	//]]>
156	</script>
157	<?php
158	}
159	}
160