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<?php
/**
* Widget API: WP_Widget_Media_Gallery class
*
* @package WordPress
* @subpackage Widgets
* @since 4.9.0
*/
/**
* Core class that implements a gallery widget.
*
* @since 4.9.0
*
* @see WP_Widget_Media
* @see WP_Widget
*/
class WP_Widget_Media_Gallery extends WP_Widget_Media {
/**
* Constructor.
*
* @since 4.9.0
*/
public function __construct() {
parent::__construct(
'media_gallery',
__( 'Gallery' ),
array(
'description' => __( 'Displays an image gallery.' ),
'mime_type' => 'image',
)
);
$this->l10n = array_merge(
$this->l10n,
array(
'no_media_selected' => __( 'No images selected' ),
'add_media' => _x( 'Add Images', 'label for button in the gallery widget; should not be longer than ~13 characters long' ),
'replace_media' => '',
'edit_media' => _x( 'Edit Gallery', 'label for button in the gallery widget; should not be longer than ~13 characters long' ),
)
);
}
/**
* Get schema for properties of a widget instance (item).
*
* @since 4.9.0
*
* @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(
'title' => array(
'type' => 'string',
'default' => '',
'sanitize_callback' => 'sanitize_text_field',
'description' => __( 'Title for the widget' ),
'should_preview_update' => false,
),
'ids' => array(
'type' => 'array',
'items' => array(
'type' => 'integer',
),
'default' => array(),
'sanitize_callback' => 'wp_parse_id_list',
),
'columns' => array(
'type' => 'integer',
'default' => 3,
'minimum' => 1,
'maximum' => 9,
),
'size' => array(
'type' => 'string',
'enum' => array_merge( get_intermediate_image_sizes(), array( 'full', 'custom' ) ),
'default' => 'thumbnail',
),
'link_type' => array(
'type' => 'string',
'enum' => array( 'post', 'file', 'none' ),
'default' => 'post',
'media_prop' => 'link',
'should_preview_update' => false,
),
'orderby_random' => array(
'type' => 'boolean',
'default' => false,
'media_prop' => '_orderbyRandom',
'should_preview_update' => false,
),
);
/** This filter is documented in wp-includes/widgets/class-wp-widget-media.php */
$schema = apply_filters( "widget_{$this->id_base}_instance_schema", $schema, $this );
return $schema;
}
/**
* Render the media on the frontend.
*
* @since 4.9.0
*
* @param array $instance Widget instance props.
*/
public function render_media( $instance ) {
$instance = array_merge( wp_list_pluck( $this->get_instance_schema(), 'default' ), $instance );
$shortcode_atts = array_merge(
$instance,
array(
'link' => $instance['link_type'],
)
);
// @codeCoverageIgnoreStart
if ( $instance['orderby_random'] ) {
$shortcode_atts['orderby'] = 'rand';
}
// @codeCoverageIgnoreEnd
echo gallery_shortcode( $shortcode_atts );
}
/**
* Loads the required media files for the media manager and scripts for media widgets.
*
* @since 4.9.0
*/
public function enqueue_admin_scripts() {
parent::enqueue_admin_scripts();
$handle = 'media-gallery-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', 'items' ) );
}
wp_add_inline_script(
$handle,
sprintf(
'wp.mediaWidgets.modelConstructors[ %s ].prototype.schema = %s;',
wp_json_encode( $this->id_base, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ),
wp_json_encode( $exported_schema, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES )
)
);
wp_add_inline_script(
$handle,
sprintf(
'
wp.mediaWidgets.controlConstructors[ %1$s ].prototype.mime_type = %2$s;
_.extend( wp.mediaWidgets.controlConstructors[ %1$s ].prototype.l10n, %3$s );
',
wp_json_encode( $this->id_base, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ),
wp_json_encode( $this->widget_options['mime_type'], JSON_HEX_TAG | JSON_UNESCAPED_SLASHES ),
wp_json_encode( $this->l10n, JSON_HEX_TAG | JSON_UNESCAPED_SLASHES )
)
);
}
/**
* Render form template scripts.
*
* @since 4.9.0
*/
public function render_control_template_scripts() {
parent::render_control_template_scripts();
?>
<script type="text/html" id="tmpl-wp-media-widget-gallery-preview">
<#
var ids = _.filter( data.ids, function( id ) {
return ( id in data.attachments );
} );
#>
<# if ( ids.length ) { #>
<ul class="gallery media-widget-gallery-preview" role="list">
<# _.each( ids, function( id, index ) { #>
<# var attachment = data.attachments[ id ]; #>
<# if ( index < 6 ) { #>
<li class="gallery-item">
<div class="gallery-icon">
<img alt="{{ attachment.alt }}"
<# if ( index === 5 && data.ids.length > 6 ) { #> aria-hidden="true" <# } #>
<# if ( attachment.sizes.thumbnail ) { #>
src="{{ attachment.sizes.thumbnail.url }}" width="{{ attachment.sizes.thumbnail.width }}" height="{{ attachment.sizes.thumbnail.height }}"
<# } else { #>
src="{{ attachment.url }}"
<# } #>
<# if ( ! attachment.alt && attachment.filename ) { #>
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' ),
'{{ attachment.filename }}'
)
);
?>
"
<# } #>
/>
<# if ( index === 5 && data.ids.length > 6 ) { #>
<div class="gallery-icon-placeholder">
<p class="gallery-icon-placeholder-text" aria-label="
<?php
printf(
/* translators: %s: The amount of additional, not visible images in the gallery widget preview. */
__( 'Additional images added to this gallery: %s' ),
'{{ data.ids.length - 5 }}'
);
?>
">+{{ data.ids.length - 5 }}</p>
</div>
<# } #>
</div>
</li>
<# } #>
<# } ); #>
</ul>
<# } else { #>
<div class="attachment-media-view">
<button type="button" class="placeholder button-add-media"><?php echo esc_html( $this->l10n['add_media'] ); ?></button>
</div>
<# } #>
</script>
<?php
}
/**
* Whether the widget has content to show.
*
* @since 4.9.0
*
* @param array $instance Widget instance props.
* @return bool Whether widget has content.
*/
protected function has_content( $instance ) {
if ( ! empty( $instance['ids'] ) ) {
$attachments = wp_parse_id_list( $instance['ids'] );
// Prime attachment post caches.
_prime_post_caches( $attachments, false, false );
foreach ( $attachments as $attachment ) {
if ( 'attachment' !== get_post_type( $attachment ) ) {
return false;
}
}
return true;
}
return false;
}
}