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