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+<?php
+/**
+ * Widget API: WP_Widget_Media_Image class
+ *
+ * @package WordPress
+ * @subpackage Widgets
+ * @since 4.8.0
+ */
+
+/**
+ * Core class that implements an image widget.
+ *
+ * @since 4.8.0
+ *
+ * @see WP_Widget_Media
+ * @see WP_Widget
+ */
+class WP_Widget_Media_Image extends WP_Widget_Media {
+
+ /**
+ * Constructor.
+ *
+ * @since 4.8.0
+ */
+ public function __construct() {
+ parent::__construct(
+ 'media_image',
+ __( 'Image' ),
+ array(
+ 'description' => __( '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: %s: URL to media library. */
+ __( 'That image cannot be found. Check your <a href="%s">media library</a> and make sure it was not deleted.' ),
+ esc_url( admin_url( 'upload.php' ) )
+ ),
+ /* translators: %d: 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(
+ 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' => 'custom',
+ '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)
+ */
+ ),
+ parent::get_instance_schema()
+ );
+ }
+
+ /**
+ * Render the media on the frontend.
+ *
+ * @since 4.8.0
+ *
+ * @param array $instance Widget instance props.
+ */
+ 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 = '';
+ if ( ! isset( $instance['caption'] ) ) {
+ $caption = $attachment->post_excerpt;
+ } elseif ( trim( $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'] );
+ $width = $instance['width'];
+ } else {
+ $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];
+ }
+
+ $image_attributes['class'] .= sprintf( ' attachment-%1$s size-%1$s', is_array( $size ) ? implode( 'x', $size ) : $size );
+
+ $image = wp_get_attachment_image( $attachment->ID, $size, false, $image_attributes );
+
+ } 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'] = '';
+ }
+
+ $attr = array(
+ 'class' => $classes,
+ 'src' => $instance['url'],
+ 'alt' => $instance['alt'],
+ 'width' => $instance['width'],
+ 'height' => $instance['height'],
+ );
+
+ $loading_optimization_attr = wp_get_loading_optimization_attributes(
+ 'img',
+ $attr,
+ 'widget_media_image'
+ );
+
+ $attr = array_merge( $attr, $loading_optimization_attr );
+
+ $attr = array_map( 'esc_attr', $attr );
+ $image = '<img';
+
+ foreach ( $attr as $name => $value ) {
+ $image .= ' ' . $name . '="' . $value . '"';
+ }
+
+ $image .= ' />';
+ } // 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 ) {
+ $link = sprintf( '<a href="%s"', esc_url( $url ) );
+ if ( ! empty( $instance['link_classes'] ) ) {
+ $link .= sprintf( ' class="%s"', esc_attr( $instance['link_classes'] ) );
+ }
+ if ( ! empty( $instance['link_rel'] ) ) {
+ $link .= sprintf( ' rel="%s"', esc_attr( $instance['link_rel'] ) );
+ }
+ if ( ! empty( $instance['link_target_blank'] ) ) {
+ $link .= ' target="_blank"';
+ }
+ $link .= '>';
+ $link .= $image;
+ $link .= '</a>';
+ $image = wp_targeted_link_rel( $link );
+ }
+
+ 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();
+
+ $handle = 'media-image-widget';
+ wp_enqueue_script( $handle );
+
+ $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( $this->l10n )
+ )
+ );
+ }
+
+ /**
+ * Render form template scripts.
+ *
+ * @since 4.8.0
+ */
+ public function render_control_template_scripts() {
+ parent::render_control_template_scripts();
+
+ ?>
+ <script type="text/html" id="tmpl-wp-media-widget-image-fields">
+ <# var elementIdPrefix = 'el' + String( Math.random() ) + '_'; #>
+ <# if ( data.url ) { #>
+ <p class="media-widget-image-link">
+ <label for="{{ elementIdPrefix }}linkUrl"><?php esc_html_e( 'Link to:' ); ?></label>
+ <input id="{{ elementIdPrefix }}linkUrl" type="text" class="widefat link" value="{{ data.link_url }}" placeholder="https://" pattern="((\w+:)?\/\/\w.*|\w+:(?!\/\/$)|\/|\?|#).*">
+ </p>
+ <# } #>
+ </script>
+ <script type="text/html" id="tmpl-wp-media-widget-image-preview">
+ <# if ( data.error && 'missing_attachment' === data.error ) { #>
+ <?php
+ wp_admin_notice(
+ $this->l10n['missing_attachment'],
+ array(
+ 'type' => 'error',
+ 'additional_classes' => array( 'notice-alt', 'notice-missing-attachment' ),
+ )
+ );
+ ?>
+ <# } else if ( data.error ) { #>
+ <?php
+ wp_admin_notice(
+ __( 'Unable to preview media due to an unknown error.' ),
+ array(
+ 'type' => 'error',
+ 'additional_classes' => array( 'notice-alt' ),
+ )
+ );
+ ?>
+ <# } else if ( data.url ) { #>
+ <img class="attachment-thumb" src="{{ data.url }}" draggable="false" alt="{{ data.alt }}"
+ <# if ( ! data.alt && data.currentFilename ) { #>
+ aria-label="
+ <?php
+ echo esc_attr(
+ sprintf(
+ /* translators: %s: The image file name. */
+ __( 'The current image has no alternative text. The file name is: %s' ),
+ '{{ data.currentFilename }}'
+ )
+ );
+ ?>
+ "
+ <# } #>
+ />
+ <# } #>
+ </script>
+ <?php
+ }
+}