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This is a clone of the WP_Widget_Media_Image class that was introduced in WP version 4.8.0.
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| <?php | |
| /** | |
| * This is a clone of the WP_Widget_Media_Image class that was introduced | |
| * in WP version 4.8.0. | |
| * | |
| * By cloning this class we can add new fields without modifying the original | |
| * class. This means we can extend it to do whatever we want :D | |
| * | |
| * @package WordPress | |
| * @subpackage Widgets | |
| * @since 4.8.0 | |
| */ | |
| /** | |
| * How to clone Image class: | |
| * | |
| * 1.) Copy the PHP and JS files from this Gist and put them in your theme's directory | |
| * under /lib/custom_image_widget/. | |
| * @link https://gist.github.com/StuffieStephie/8dd2d3e5a36b08f0094a33bd70384dd0/ (JS File) | |
| * | |
| * 2.) In your theme's functions.php file paste the following: | |
| * // Load up a custom image widget class clone | |
| * include_once __DIR__ . "/lib/custom_image_widget/custom_image_widget.php"; | |
| * | |
| * That should be it! If you need another copy or want to rename aspects of this class | |
| * follow the steps below for this file. (Search `Step #` to find where to edit quickly) | |
| * | |
| * Step 1: | |
| * Rename class (Name here: `Custom_Widget_Media_Image`) | |
| * --------------------------------------------------------------------- | |
| * Step 2: | |
| * In the __construct function change the id_base (Name here: `custom_media_image`) | |
| * --------------------------------------------------------------------- | |
| * Step 3: | |
| * Assign $handle. (Name here: `custom-media-image-widget`) | |
| * --------------------------------------------------------------------- | |
| * Step 4: | |
| * Enqueue your modified JS file. | |
| * NOTE: This assumes the path is `/yourtheme/lib/custom_image_widget/` | |
| * Change if needed. | |
| * --------------------------------------------------------------------- | |
| * Step 5: | |
| * Change Fields Template script ID. | |
| * Name here: `tmpl-custom-media-widget-image-fields` | |
| * NOTE: Must start with `tmpl`. | |
| * Step 5a: | |
| * In JS file, assign the fieldsContainer variable | |
| * to this ID sans `tmpl-` at the beginning. It will not work without it. | |
| * Ex. fieldsTemplate = wp.template( 'custom-media-widget-image-fields' ); | |
| * --------------------------------------------------------------------- | |
| * Step 6: | |
| * Similar to Step 5 -- Change Preview Template script ID. | |
| * Name here: `tmpl-custom-media-widget-image-preview` | |
| * NOTE: Must start with `tmpl`. | |
| * Step 6a: | |
| * In JS file, assign the fieldsContainer variable | |
| * to this ID sans `tmpl-` at the beginning. It will not work without it. | |
| * Ex. previewTemplate = wp.template( 'custom-media-widget-image-preview' ); | |
| * --------------------------------------------------------------------- | |
| * Step 7: | |
| * Register Custom_Widget_Text widget. (Rename if needed.) | |
| * --------------------------------------------------------------------- | |
| * Step 8: | |
| * Call function on widget init (Function name defined in Step 7) | |
| * --------------------------- END ------------------------ */ | |
| /** | |
| * Core class that implements an image widget. | |
| * | |
| * @since 4.8.0 | |
| * | |
| * @see WP_Widget_Media & WP_Widget_Media_Image | |
| */ | |
| /*-------------------------------------------------------------- | |
| # Step 1: Rename class (I've named it `Custom_Widget_Media_Image`) | |
| --------------------------------------------------------------*/ | |
| class Custom_Widget_Media_Image extends WP_Widget_Media { | |
| /** | |
| * Constructor. | |
| * | |
| * @since 4.8.0 | |
| */ | |
| public function __construct() { | |
| /*-------------------------------------------------------------- | |
| # Step 2: | |
| * In the __construct function change the id_base (Name here: `custom_media_image`) | |
| --------------------------------------------------------------*/ | |
| parent::__construct( 'custom_media_image', __( 'Custom Image' ), array( | |
| 'description' => __( 'Custom: Displays an image.' ), | |
| 'mime_type' => 'image', | |
| ) ); | |
| $this->l10n = array_merge( $this->l10n, array( | |
| 'no_media_selected' => __( 'No image selected' ), | |
| 'add_media' => _x( 'Add Image', 'label for button in the image widget' ), | |
| 'replace_media' => _x( 'Replace Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ), | |
| 'edit_media' => _x( 'Edit Image', 'label for button in the image widget; should preferably not be longer than ~13 characters long' ), | |
| 'missing_attachment' => sprintf( | |
| /* translators: placeholder is URL to media library */ | |
| __( 'We can’t find that image. Check your <a href="%s">media library</a> and make sure it wasn’t deleted.' ), | |
| esc_url( admin_url( 'upload.php' ) ) | |
| ), | |
| /* translators: %d is widget count */ | |
| 'media_library_state_multi' => _n_noop( 'Image Widget (%d)', 'Image Widget (%d)' ), | |
| 'media_library_state_single' => __( 'Image Widget' ), | |
| ) ); | |
| } | |
| /** | |
| * 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() { | |
| return array_merge( | |
| parent::get_instance_schema(), | |
| array( | |
| 'size' => array( | |
| 'type' => 'string', | |
| 'enum' => array_merge( get_intermediate_image_sizes(), array( 'full', 'custom' ) ), | |
| 'default' => 'medium', | |
| 'description' => __( 'Size' ), | |
| ), | |
| 'width' => array( // Via 'customWidth', only when size=custom; otherwise via 'width'. | |
| 'type' => 'integer', | |
| 'minimum' => 0, | |
| 'default' => 0, | |
| 'description' => __( 'Width' ), | |
| ), | |
| 'height' => array( // Via 'customHeight', only when size=custom; otherwise via 'height'. | |
| 'type' => 'integer', | |
| 'minimum' => 0, | |
| 'default' => 0, | |
| 'description' => __( 'Height' ), | |
| ), | |
| 'caption' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => 'wp_kses_post', | |
| 'description' => __( 'Caption' ), | |
| 'should_preview_update' => false, | |
| ), | |
| 'alt' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => 'sanitize_text_field', | |
| 'description' => __( 'Alternative Text' ), | |
| ), | |
| 'link_type' => array( | |
| 'type' => 'string', | |
| 'enum' => array( 'none', 'file', 'post', 'custom' ), | |
| 'default' => 'none', | |
| 'media_prop' => 'link', | |
| 'description' => __( 'Link To' ), | |
| 'should_preview_update' => true, | |
| ), | |
| 'link_url' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'format' => 'uri', | |
| 'media_prop' => 'linkUrl', | |
| 'description' => __( 'URL' ), | |
| 'should_preview_update' => true, | |
| ), | |
| 'image_classes' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => array( $this, 'sanitize_token_list' ), | |
| 'media_prop' => 'extraClasses', | |
| 'description' => __( 'Image CSS Class' ), | |
| 'should_preview_update' => false, | |
| ), | |
| 'link_classes' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => array( $this, 'sanitize_token_list' ), | |
| 'media_prop' => 'linkClassName', | |
| 'should_preview_update' => false, | |
| 'description' => __( 'Link CSS Class' ), | |
| ), | |
| 'link_rel' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => array( $this, 'sanitize_token_list' ), | |
| 'media_prop' => 'linkRel', | |
| 'description' => __( 'Link Rel' ), | |
| 'should_preview_update' => false, | |
| ), | |
| 'link_target_blank' => array( | |
| 'type' => 'boolean', | |
| 'default' => false, | |
| 'media_prop' => 'linkTargetBlank', | |
| 'description' => __( 'Open link in a new tab' ), | |
| 'should_preview_update' => false, | |
| ), | |
| 'image_title' => array( | |
| 'type' => 'string', | |
| 'default' => '', | |
| 'sanitize_callback' => 'sanitize_text_field', | |
| 'media_prop' => 'title', | |
| 'description' => __( 'Image Title Attribute' ), | |
| 'should_preview_update' => false, | |
| ), | |
| /* | |
| * There are two additional properties exposed by the PostImage modal | |
| * that don't seem to be relevant, as they may only be derived read-only | |
| * values: | |
| * - originalUrl | |
| * - aspectRatio | |
| * - height (redundant when size is not custom) | |
| * - width (redundant when size is not custom) | |
| */ | |
| ) | |
| ); | |
| } | |
| /** | |
| * Render the media on the frontend. | |
| * | |
| * @since 4.8.0 | |
| * | |
| * @param array $instance Widget instance props. | |
| * @return void | |
| */ | |
| public function render_media( $instance ) { | |
| $instance = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance ); | |
| $instance = wp_parse_args( $instance, array( | |
| 'size' => 'thumbnail', | |
| ) ); | |
| $attachment = null; | |
| if ( $this->is_attachment_with_mime_type( $instance['attachment_id'], $this->widget_options['mime_type'] ) ) { | |
| $attachment = get_post( $instance['attachment_id'] ); | |
| } | |
| if ( $attachment ) { | |
| $caption = $attachment->post_excerpt; | |
| if ( $instance['caption'] ) { | |
| $caption = $instance['caption']; | |
| } | |
| $image_attributes = array( | |
| 'class' => sprintf( 'image wp-image-%d %s', $attachment->ID, $instance['image_classes'] ), | |
| 'style' => 'max-width: 100%; height: auto;', | |
| ); | |
| if ( ! empty( $instance['image_title'] ) ) { | |
| $image_attributes['title'] = $instance['image_title']; | |
| } | |
| if ( $instance['alt'] ) { | |
| $image_attributes['alt'] = $instance['alt']; | |
| } | |
| $size = $instance['size']; | |
| if ( 'custom' === $size || ! in_array( $size, array_merge( get_intermediate_image_sizes(), array( 'full' ) ), true ) ) { | |
| $size = array( $instance['width'], $instance['height'] ); | |
| } | |
| $image_attributes['class'] .= sprintf( ' attachment-%1$s size-%1$s', is_array( $size ) ? join( 'x', $size ) : $size ); | |
| $image = wp_get_attachment_image( $attachment->ID, $size, false, $image_attributes ); | |
| $caption_size = _wp_get_image_size_from_meta( $instance['size'], wp_get_attachment_metadata( $attachment->ID ) ); | |
| $width = empty( $caption_size[0] ) ? 0 : $caption_size[0]; | |
| } else { | |
| if ( empty( $instance['url'] ) ) { | |
| return; | |
| } | |
| $instance['size'] = 'custom'; | |
| $caption = $instance['caption']; | |
| $width = $instance['width']; | |
| $classes = 'image ' . $instance['image_classes']; | |
| if ( 0 === $instance['width'] ) { | |
| $instance['width'] = ''; | |
| } | |
| if ( 0 === $instance['height'] ) { | |
| $instance['height'] = ''; | |
| } | |
| $image = sprintf( '<img class="%1$s" src="%2$s" alt="%3$s" width="%4$s" height="%5$s" />', | |
| esc_attr( $classes ), | |
| esc_url( $instance['url'] ), | |
| esc_attr( $instance['alt'] ), | |
| esc_attr( $instance['width'] ), | |
| esc_attr( $instance['height'] ) | |
| ); | |
| } // End if(). | |
| $url = ''; | |
| if ( 'file' === $instance['link_type'] ) { | |
| $url = $attachment ? wp_get_attachment_url( $attachment->ID ) : $instance['url']; | |
| } elseif ( $attachment && 'post' === $instance['link_type'] ) { | |
| $url = get_attachment_link( $attachment->ID ); | |
| } elseif ( 'custom' === $instance['link_type'] && ! empty( $instance['link_url'] ) ) { | |
| $url = $instance['link_url']; | |
| } | |
| if ( $url ) { | |
| $image = sprintf( | |
| '<a href="%1$s" class="%2$s" rel="%3$s" target="%4$s">%5$s</a>', | |
| esc_url( $url ), | |
| esc_attr( $instance['link_classes'] ), | |
| esc_attr( $instance['link_rel'] ), | |
| ! empty( $instance['link_target_blank'] ) ? '_blank' : '', | |
| $image | |
| ); | |
| } | |
| if ( $caption ) { | |
| $image = img_caption_shortcode( array( | |
| 'width' => $width, | |
| 'caption' => $caption, | |
| ), $image ); | |
| } | |
| echo $image; | |
| } | |
| /** | |
| * Loads the required media files for the media manager and scripts for media widgets. | |
| * | |
| * @since 4.8.0 | |
| */ | |
| public function enqueue_admin_scripts() { | |
| parent::enqueue_admin_scripts(); | |
| /*-------------------------------------------------------------- | |
| # Step 3: | |
| * Assign $handle. Name here: `custom-media-image-widget` | |
| --------------------------------------------------------------*/ | |
| $handle = 'custom-media-image-widget'; | |
| /*-------------------------------------------------------------- | |
| # Step 4: | |
| * Enqueue your modified JS file. | |
| * NOTE: This assumes the path is `/yourtheme/lib/custom_image_widget/` | |
| * Change if needed. | |
| --------------------------------------------------------------*/ | |
| $path_to_JS = '/lib/custom_image_widget/custom-media-image-widget.js'; | |
| wp_enqueue_script( $handle, // Unique ID | |
| get_template_directory_uri() . $path_to_JS, //Filepath | |
| array('jquery'), // Dependencies | |
| '1.0.0', //Version number | |
| true //load in footer | |
| ); | |
| $exported_schema = array(); | |
| foreach ( $this->get_instance_schema() as $field => $field_schema ) { | |
| $exported_schema[ $field ] = wp_array_slice_assoc( $field_schema, array( 'type', 'default', 'enum', 'minimum', 'format', 'media_prop', 'should_preview_update' ) ); | |
| } | |
| wp_add_inline_script( | |
| $handle, | |
| sprintf( | |
| 'wp.mediaWidgets.modelConstructors[ %s ].prototype.schema = %s;', | |
| wp_json_encode( $this->id_base ), | |
| wp_json_encode( $exported_schema ) | |
| ) | |
| ); | |
| wp_add_inline_script( | |
| $handle, | |
| sprintf( | |
| ' | |
| wp.mediaWidgets.controlConstructors[ %1$s ].prototype.mime_type = %2$s; | |
| wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n = _.extend( {}, wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n, %3$s ); | |
| ', | |
| wp_json_encode( $this->id_base ), | |
| wp_json_encode( $this->widget_options['mime_type'] ), | |
| wp_json_encode( $this->l10n ) | |
| ) | |
| ); | |
| } | |
| /** | |
| * Render form template scripts. | |
| * | |
| * @since 4.8.0 | |
| */ | |
| public function render_control_template_scripts() { | |
| parent::render_control_template_scripts(); | |
| /*-------------------------------------------------------------- | |
| # Step 5: | |
| * Change Fields Template script ID. | |
| * Name here: `tmpl-custom-media-widget-image-fields` | |
| * NOTE: Must start with `tmpl`. | |
| * Step 5a: | |
| * In JS file, assign the fieldsTemplate variable | |
| * to this ID sans `tmpl-` at the beginning. It will not work without it. | |
| * Ex. fieldsTemplate = wp.template( 'custom-media-widget-image-fields' ); | |
| --------------------------------------------------------------*/ | |
| ?> | |
| <script type="text/html" id="tmpl-custom-media-widget-image-fields"> | |
| <# var elementIdPrefix = 'el' + String( Math.random() ) + '_'; #> | |
| <# if ( data.url ) { #> | |
| <p class="media-widget-image-link"> | |
| <label for="{{ elementIdPrefix }}linkUrl"><?php esc_html_e( 'Link to:' ); ?></label> | |
| <input id="{{ elementIdPrefix }}linkUrl" type="url" class="widefat link" value="{{ data.link_url }}" placeholder="http://"> | |
| </p> | |
| <# } #> | |
| </script> | |
| <?php | |
| /*-------------------------------------------------------------- | |
| # Step 6: | |
| * Similar to Step 5 -- Change Preview Template script ID. | |
| * Name here: `tmpl-custom-media-widget-image-preview` | |
| * NOTE: Must start with `tmpl`. | |
| * Step 6a: | |
| * In JS file, assign the previewTemplate variable | |
| * to this ID sans `tmpl-` at the beginning. It will not work without it. | |
| * Ex. previewTemplate = wp.template( 'custom-media-widget-image-preview' ); | |
| --------------------------------------------------------------*/ | |
| ?> | |
| <script type="text/html" id="tmpl-custom-media-widget-image-preview"> | |
| <# var describedById = 'describedBy-' + String( Math.random() ); #> | |
| <# if ( data.error && 'missing_attachment' === data.error ) { #> | |
| <div class="notice notice-error notice-alt notice-missing-attachment"> | |
| <p><?php echo $this->l10n['missing_attachment']; ?></p> | |
| </div> | |
| <# } else if ( data.error ) { #> | |
| <div class="notice notice-error notice-alt"> | |
| <p><?php _e( 'Unable to preview media due to an unknown error.' ); ?></p> | |
| </div> | |
| <# } else if ( data.url ) { #> | |
| <img class="attachment-thumb" src="{{ data.url }}" draggable="false" alt="{{ data.alt }}" <# if ( ! data.alt && data.currentFilename ) { #> aria-describedby="{{ describedById }}" <# } #> /> | |
| <# if ( ! data.alt && data.currentFilename ) { #> | |
| <p class="hidden" id="{{ describedById }}"><?php | |
| /* translators: placeholder is image filename */ | |
| echo sprintf( __( 'Current image: %s' ), '{{ data.currentFilename }}' ); | |
| ?></p> | |
| <# } #> | |
| <# } #> | |
| </script> | |
| <?php | |
| } | |
| } | |
| /*-------------------------------------------------------------- | |
| # Step 7: | |
| * Register Custom_Widget_Text widget. (Rename if needed.) | |
| --------------------------------------------------------------*/ | |
| function register_custom_image_widget() { | |
| register_widget( | |
| 'Custom_Widget_Media_Image' //Name of new class | |
| ); | |
| } | |
| /*-------------------------------------------------------------- | |
| # Step 8: | |
| * Call function on widget init (Function name defined in Step 7) | |
| --------------------------------------------------------------*/ | |
| add_action( 'widgets_init', | |
| 'register_custom_image_widget' // Function name defined in Step 7 | |
| ); |
@StuffieStephie Я могу следовать код для клонирования класса-WP-виджет-медиа-изображения, а также добавить дополнительное поле «Image Details» в массив в get_instance_schema () следующим образом :
`'image_details' => array( 'type' => 'string', 'default' => '', 'sanitize_callback' => 'sanitize_text_field', 'media_prop' => 'imageDetails', 'description' => __('Image Details'), 'should_preview_update' => false, ),`
и я также добавил соответствующие теги в render_control_template_scripts (). Я вижу новое поле и ввожу новое значение в раскрывающееся меню редактирования виджета. Однако я не могу сохранить стоимость. Всякий раз, когда я обновляю страницу редактирования виджета, ввод исчезает.Нужно ли мне что-то делать в функции Update () базового класса? Пожалуйста помоги. Спасибо.
Did you manage to solve the problem?
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@StuffieStephie I am able to follow your code to clone the class-wp-widget-media-image, and add an additional field "Image Details" to the array in get_instance_schema() as follow:
`
`
and I also added the corresponding tags in render_control_template_scripts(). I can see the new field and enter new value in the widget-edit dropdown. However, I am unable to save the value. Whenever I refresh the widget-edit page and the input is gone.
Do I need to do something in the base class' Update() function? Please Help. Thank you.