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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 = $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
}
}