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1<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
2/**
3 * Plugin Name: Google Translate Widget for WordPress.com
4 * Plugin URI: https://automattic.com
5 * Description: Add a widget for automatic translation
6 * Author: Artur Piszek
7 * Version: 0.1
8 * Author URI: https://automattic.com
9 * Text Domain: jetpack
10 */
11
12// phpcs:disable Universal.Files.SeparateFunctionsFromOO.Mixed -- TODO: Move classes to appropriately-named class files.
13
14use Automattic\Jetpack\Assets;
15
16if ( ! defined( 'ABSPATH' ) ) {
17    exit( 0 );
18}
19
20/**
21 * Jetpack_Google_Translate_Widget main class.
22 */
23class Jetpack_Google_Translate_Widget extends WP_Widget {
24    /**
25     * Singleton instance of the widget, not to show more than once.
26     *
27     * @var array
28     */
29    public static $instance = null;
30
31    /**
32     * Default widget title.
33     *
34     * @var string $default_title
35     */
36    public $default_title;
37
38    /**
39     * Register widget with WordPress.
40     */
41    public function __construct() {
42        parent::__construct(
43            'google_translate_widget',
44            /** This filter is documented in modules/widgets/facebook-likebox.php */
45            apply_filters( 'jetpack_widget_name', __( 'Google Translate', 'jetpack' ) ),
46            array(
47                'description'                 => __( 'Provide your readers with the option to translate your site into their preferred language.', 'jetpack' ),
48                'customize_selective_refresh' => true,
49            )
50        );
51        add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_scripts' ) );
52
53        $this->default_title = esc_html__( 'Translate', 'jetpack' );
54    }
55
56    /**
57     * Enqueue frontend JS scripts.
58     */
59    public function enqueue_scripts() {
60        wp_register_script(
61            'google-translate-init',
62            Assets::get_file_url_for_environment(
63                '_inc/build/widgets/google-translate/google-translate.min.js',
64                'modules/widgets/google-translate/google-translate.js'
65            ),
66            array(),
67            JETPACK__VERSION,
68            false
69        );
70        wp_register_script(
71            'google-translate',
72            '//translate.google.com/translate_a/element.js?cb=googleTranslateElementInit',
73            array( 'google-translate-init' ),
74            JETPACK__VERSION,
75            false
76        );
77        // Admin bar is also displayed on top of the site which causes google translate bar to hide beneath.
78        // Overwrite position of body.admin-bar
79        // This is a hack to show google translate bar a bit lower.
80        $lower_translate_bar = '
81            .admin-bar {
82                position: inherit !important;
83                top: auto !important;
84            }
85            .admin-bar .goog-te-banner-frame {
86                top: 32px !important
87            }
88            @media screen and (max-width: 782px) {
89                .admin-bar .goog-te-banner-frame {
90                    top: 46px !important;
91                }
92            }
93            @media screen and (max-width: 480px) {
94                .admin-bar .goog-te-banner-frame {
95                    position: absolute;
96                }
97            }
98        ';
99        wp_add_inline_style( 'admin-bar', $lower_translate_bar );
100        wp_add_inline_style( 'wpcom-admin-bar', $lower_translate_bar );
101    }
102
103    /**
104     * Display the Widget.
105     *
106     * @see WP_Widget::widget()
107     *
108     * @param array $args     Display arguments.
109     * @param array $instance The settings for the particular instance of the widget.
110     */
111    public function widget( $args, $instance ) {
112        // We never should show more than 1 instance of this.
113        if ( null === self::$instance ) {
114            $instance = wp_parse_args(
115                $instance,
116                array(
117                    'title' => $this->default_title,
118                )
119            );
120
121            /**
122             * Filter the layout of the Google Translate Widget.
123             *
124             * 3 different integers are accepted.
125             *  0 for the vertical layout.
126             *  1 for the horizontal layout.
127             *  2 for the dropdown only.
128             *
129             * @see https://translate.google.com/manager/website/
130             *
131             * @module widgets
132             *
133             * @since 5.5.0
134             *
135             * @param string $layout layout of the Google Translate Widget.
136             */
137            $button_layout = apply_filters( 'jetpack_google_translate_widget_layout', 0 );
138
139            if (
140                ! is_int( $button_layout )
141                || 0 > $button_layout
142                || 2 < $button_layout
143            ) {
144                $button_layout = 0;
145            }
146
147            wp_localize_script(
148                'google-translate-init',
149                '_wp_google_translate_widget',
150                array(
151                    'lang'   => get_locale(),
152                    'layout' => $button_layout,
153                )
154            );
155            wp_enqueue_script( 'google-translate-init' );
156            wp_enqueue_script( 'google-translate' );
157
158            $title = $instance['title'];
159
160            if ( ! isset( $title ) ) {
161                $title = $this->default_title;
162            }
163
164            /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
165            $title = apply_filters( 'widget_title', $title );
166
167            echo $args['before_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
168            if ( ! empty( $title ) ) {
169                echo $args['before_title'] . $title . $args['after_title']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
170            }
171            echo '<div id="google_translate_element"></div>';
172            echo $args['after_widget']; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
173            self::$instance = $instance;
174            /** This action is documented in modules/widgets/gravatar-profile.php */
175            do_action( 'jetpack_stats_extra', 'widget_view', 'google-translate' );
176        }
177    }
178
179    /**
180     * Widget form in the dashboard.
181     *
182     * @see WP_Widget::form()
183     *
184     * @param array $instance Previously saved values from database.
185     * @return string|void
186     */
187    public function form( $instance ) {
188        $title = isset( $instance['title'] ) ? $instance['title'] : false;
189        if ( false === $title ) {
190            $title = $this->default_title;
191        }
192        ?>
193<p>
194    <label for="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>"><?php esc_html_e( 'Title:', 'jetpack' ); ?></label>
195    <input class="widefat" id="<?php echo esc_attr( $this->get_field_id( 'title' ) ); ?>" name="<?php echo esc_attr( $this->get_field_name( 'title' ) ); ?>" type="text" value="<?php echo esc_attr( $title ); ?>" />
196</p>
197        <?php
198    }
199
200    /**
201     * Sanitize widget form values as they are saved.
202     *
203     * @see WP_Widget::update()
204     *
205     * @param array $new_instance Values just sent to be saved.
206     * @param array $old_instance Previously saved values from database.
207     *
208     * @return array $instance Updated safe values to be saved.
209     */
210    public function update( $new_instance, $old_instance ) { // phpcs:ignore VariableAnalysis.CodeAnalysis.VariableAnalysis.UnusedVariable
211        $instance          = array();
212        $instance['title'] = wp_kses( $new_instance['title'], array() );
213        if ( $instance['title'] === $this->default_title ) {
214            $instance['title'] = false; // Store as false in case of language change.
215        }
216        return $instance;
217    }
218}
219
220/**
221 * Register the widget for use in Appearance -> Widgets.
222 */
223function jetpack_google_translate_widget_init() {
224    register_widget( 'Jetpack_Google_Translate_Widget' );
225}
226add_action( 'widgets_init', 'jetpack_google_translate_widget_init' );