polylang / include / widget-languages.php

widget-languages.php in Polylang 2.6.8, at include/widget-languages.php

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