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<?php /** * Widget API: WP_Media_Widget class * * @package WordPress * @subpackage Widgets * @since 4.8.0 */ /** * Core class that implements a media widget. * * @since 4.8.0 * * @see WP_Widget */ abstract class WP_Widget_Media extends WP_Widget { /** * Translation labels. * * @since 4.8.0 * @var array */ public $l10n = array( 'add_to_widget' => '', 'replace_media' => '', 'edit_media' => '', 'media_library_state_multi' => '', 'media_library_state_single' => '', 'missing_attachment' => '', 'no_media_selected' => '', 'add_media' => '', ); /** * Whether or not the widget has been registered yet. * * @since 4.8.1 * @var bool */ protected $registered = false; /** * Constructor. * * @since 4.8.0 * * @param string $id_base Base ID for the widget, lowercase and unique. * @param string $name Name for the widget displayed on the configuration page. * @param array $widget_options Optional. Widget options. See wp_register_sidebar_widget() for * information on accepted arguments. Default empty array. * @param array $control_options Optional. Widget control options. See wp_register_widget_control() * for information on accepted arguments. Default empty array. */ public function __construct( $id_base, $name, $widget_options = array(), $control_options = array() ) { $widget_opts = wp_parse_args( $widget_options, array( 'description' => __( 'A media item.' ), 'customize_selective_refresh' => true, 'mime_type' => '', ) ); $control_opts = wp_parse_args( $control_options, array() ); $l10n_defaults = array( 'no_media_selected' => __( 'No media selected' ), 'add_media' => _x( 'Add Media', 'label for button in the media widget' ), 'replace_media' => _x( 'Replace Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ), 'edit_media' => _x( 'Edit Media', 'label for button in the media widget; should preferably not be longer than ~13 characters long' ), 'add_to_widget' => __( 'Add to Widget' ), 'missing_attachment' => sprintf( /* translators: %s: URL to media library. */ __( 'We can’t find that file. Check your <a href="%s">media library</a> and make sure it wasn’t deleted.' ), esc_url( admin_url( 'upload.php' ) ) ), /* translators: %d: Widget count. */ 'media_library_state_multi' => _n_noop( 'Media Widget (%d)', 'Media Widget (%d)' ), 'media_library_state_single' => __( 'Media Widget' ), 'unsupported_file_type' => __( 'Looks like this isn’t the correct kind of file. Please link to an appropriate file instead.' ), ); $this->l10n = array_merge( $l10n_defaults, array_filter( $this->l10n ) ); parent::__construct( $id_base, $name, $widget_opts, $control_opts ); } /** * Add hooks while registering all widget instances of this widget class. * * @since 4.8.0 * * @param int $number Optional. The unique order number of this widget instance * compared to other instances of the same class. Default -1. */ public function _register_one( $number = -1 ) { parent::_register_one( $number ); if ( $this->registered ) { return; } $this->registered = true; // Note that the widgets component in the customizer will also do // the 'admin_print_scripts-widgets.php' action in WP_Customize_Widgets::print_scripts(). add_action( 'admin_print_scripts-widgets.php', array( $this, 'enqueue_admin_scripts' ) ); if ( $this->is_preview() ) { add_action( 'wp_enqueue_scripts', array( $this, 'enqueue_preview_scripts' ) ); } // Note that the widgets component in the customizer will also do // the 'admin_footer-widgets.php' action in WP_Customize_Widgets::print_footer_scripts(). add_action( 'admin_footer-widgets.php', array( $this, 'render_control_template_scripts' ) ); add_filter( 'display_media_states', array( $this, 'display_media_state' ), 10, 2 ); } /** * Get schema for properties of a widget instance (item). * * @since 4.8.0 * * @see WP_REST_Controller::get_item_schema() * @see WP_REST_Controller::get_additional_fields() * @link https://core.trac.wordpress.org/ticket/35574 * * @return array Schema for properties. */ public function get_instance_schema() { $schema = array( 'attachment_id' => array( 'type' => 'integer', 'default' => 0, 'minimum' => 0, 'description' => __( 'Attachment post ID' ), 'media_prop' => 'id', ), 'url' => array( 'type' => 'string', 'default' => '', 'format' => 'uri', 'description' => __( 'URL to the media file' ), ), 'title' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field', 'description' => __( 'Title for the widget' ), 'should_preview_update' => false, ), ); /** * Filters the media widget instance schema to add additional properties. * * @since 4.9.0 * * @param array $schema Instance schema. * @param WP_Widget_Media $widget Widget object. */ $schema = apply_filters( "widget_{$this->id_base}_instance_schema", $schema, $this ); return $schema; } /** * Determine if the supplied attachment is for a valid attachment post with the specified MIME type. * * @since 4.8.0 * * @param int|WP_Post $attachment Attachment post ID or object. * @param string $mime_type MIME type. * @return bool Is matching MIME type. */ public function is_attachment_with_mime_type( $attachment, $mime_type ) { if ( empty( $attachment ) ) { return false; } $attachment = get_post( $attachment ); if ( ! $attachment ) { return false; } if ( 'attachment' !== $attachment->post_type ) { return false; } return wp_attachment_is( $mime_type, $attachment ); } /** * Sanitize a token list string, such as used in HTML rel and class attributes. * * @since 4.8.0 * * @link http://w3c.github.io/html/infrastructure.html#space-separated-tokens * @link https://developer.mozilla.org/en-US/docs/Web/API/DOMTokenList * @param string|array $tokens List of tokens separated by spaces, or an array of tokens. * @return string Sanitized token string list. */ public function sanitize_token_list( $tokens ) { if ( is_string( $tokens ) ) { $tokens = preg_split( '/\s+/', trim( $tokens ) ); } $tokens = array_map( 'sanitize_html_class', $tokens ); $tokens = array_filter( $tokens ); return implode( ' ', $tokens ); } /** * Displays the widget on the front-end. * * @since 4.8.0 * * @see WP_Widget::widget() * * @param array $args Display arguments including before_title, after_title, before_widget, and after_widget. * @param array $instance Saved setting from the database. */ public function widget( $args, $instance ) { $instance = wp_parse_args( $instance, wp_list_pluck( $this->get_instance_schema(), 'default' ) ); // Short-circuit if no media is selected. if ( ! $this->has_content( $instance ) ) { return; } echo $args['before_widget']; /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */ $title = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base ); if ( $title ) { echo $args['before_title'] . $title . $args['after_title']; } /** * Filters the media widget instance prior to rendering the media. * * @since 4.8.0 * * @param array $instance Instance data. * @param array $args Widget args. * @param WP_Widget_Media $widget Widget object. */ $instance = apply_filters( "widget_{$this->id_base}_instance", $instance, $args, $this ); $this->render_media( $instance ); echo $args['after_widget']; } /** * Sanitizes the widget form values as they are saved. * * @since 4.8.0 * * @see WP_Widget::update() * @see WP_REST_Request::has_valid_params() * @see WP_REST_Request::sanitize_params() * * @param array $new_instance Values just sent to be saved. * @param array $instance Previously saved values from database. * @return array Updated safe values to be saved. */ public function update( $new_instance, $instance ) { $schema = $this->get_instance_schema(); foreach ( $schema as $field => $field_schema ) { if ( ! array_key_exists( $field, $new_instance ) ) { continue; } $value = $new_instance[ $field ]; /* * Workaround for rest_validate_value_from_schema() due to the fact that * rest_is_boolean( '' ) === false, while rest_is_boolean( '1' ) is true. */ if ( 'boolean' === $field_schema['type'] && '' === $value ) { $value = false; } if ( true !== rest_validate_value_from_schema( $value, $field_schema, $field ) ) { continue; } $value = rest_sanitize_value_from_schema( $value, $field_schema ); // @codeCoverageIgnoreStart if ( is_wp_error( $value ) ) { continue; // Handle case when rest_sanitize_value_from_schema() ever returns WP_Error as its phpdoc @return tag indicates. } // @codeCoverageIgnoreEnd if ( isset( $field_schema['sanitize_callback'] ) ) { $value = call_user_func( $field_schema['sanitize_callback'], $value ); } if ( is_wp_error( $value ) ) { continue; } $instance[ $field ] = $value; } return $instance; } /** * Render the media on the frontend. * * @since 4.8.0 * * @param array $instance Widget instance props. * @return string */ abstract public function render_media( $instance ); /** * Outputs the settings update form. * * Note that the widget UI itself is rendered with JavaScript via `MediaWidgetControl#render()`. * * @since 4.8.0 * * @see \WP_Widget_Media::render_control_template_scripts() Where the JS template is located. * * @param array $instance Current settings. */ final public function form( $instance ) { $instance_schema = $this->get_instance_schema(); $instance = wp_array_slice_assoc( wp_parse_args( (array) $instance, wp_list_pluck( $instance_schema, 'default' ) ), array_keys( $instance_schema ) ); foreach ( $instance as $name => $value ) : ?> <input type="hidden" data-property="<?php echo esc_attr( $name ); ?>" class="media-widget-instance-property" name="<?php echo esc_attr( $this->get_field_name( $name ) ); ?>" id="<?php echo esc_attr( $this->get_field_id( $name ) ); // Needed specifically by wpWidgets.appendTitle(). ?>" value="<?php echo esc_attr( is_array( $value ) ? implode( ',', $value ) : (string) $value ); ?>" /> <?php endforeach; } /** * Filters the default media display states for items in the Media list table. * * @since 4.8.0 * * @param array $states An array of media states. * @param WP_Post $post The current attachment object. * @return array */ public function display_media_state( $states, $post = null ) { if ( ! $post ) { $post = get_post(); } // Count how many times this attachment is used in widgets. $use_count = 0; foreach ( $this->get_settings() as $instance ) { if ( isset( $instance['attachment_id'] ) && $instance['attachment_id'] === $post->ID ) { $use_count++; } } if ( 1 === $use_count ) { $states[] = $this->l10n['media_library_state_single']; } elseif ( $use_count > 0 ) { $states[] = sprintf( translate_nooped_plural( $this->l10n['media_library_state_multi'], $use_count ), number_format_i18n( $use_count ) ); } return $states; } /** * Enqueue preview scripts. * * These scripts normally are enqueued just-in-time when a widget is rendered. * In the customizer, however, widgets can be dynamically added and rendered via * selective refresh, and so it is important to unconditionally enqueue them in * case a widget does get added. * * @since 4.8.0 */ public function enqueue_preview_scripts() {} /** * Loads the required scripts and styles for the widget control. * * @since 4.8.0 */ public function enqueue_admin_scripts() { wp_enqueue_media(); wp_enqueue_script( 'media-widgets' ); } /** * Render form template scripts. * * @since 4.8.0 */ public function render_control_template_scripts() { ?> <script type="text/html" id="tmpl-widget-media-<?php echo esc_attr( $this->id_base ); ?>-control"> <# var elementIdPrefix = 'el' + String( Math.random() ) + '_' #> <p> <label for="{{ elementIdPrefix }}title"><?php esc_html_e( 'Title:' ); ?></label> <input id="{{ elementIdPrefix }}title" type="text" class="widefat title"> </p> <div class="media-widget-preview <?php echo esc_attr( $this->id_base ); ?>"> <div class="attachment-media-view"> <button type="button" class="select-media button-add-media not-selected"> <?php echo esc_html( $this->l10n['add_media'] ); ?> </button> </div> </div> <p class="media-widget-buttons"> <button type="button" class="button edit-media selected"> <?php echo esc_html( $this->l10n['edit_media'] ); ?> </button> <?php if ( ! empty( $this->l10n['replace_media'] ) ) : ?> <button type="button" class="button change-media select-media selected"> <?php echo esc_html( $this->l10n['replace_media'] ); ?> </button> <?php endif; ?> </p> <div class="media-widget-fields"> </div> </script> <?php } /** * Whether the widget has content to show. * * @since 4.8.0 * * @param array $instance Widget instance props. * @return bool Whether widget has content. */ protected function has_content( $instance ) { return ( $instance['attachment_id'] && 'attachment' === get_post_type( $instance['attachment_id'] ) ) || $instance['url']; } }
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