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<?php |
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|
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/** |
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* Slideshow shortcode usage: [gallery type="slideshow"] or the older [slideshow] |
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*/ |
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class Jetpack_Slideshow_Shortcode { |
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public $instance_count = 0; |
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|
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function __construct() { |
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global $shortcode_tags; |
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|
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$needs_scripts = false; |
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|
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// Only if the slideshow shortcode has not already been defined. |
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if ( ! array_key_exists( 'slideshow', $shortcode_tags ) ) { |
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add_shortcode( 'slideshow', array( $this, 'shortcode_callback' ) ); |
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$needs_scripts = true; |
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} |
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|
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// Only if the gallery shortcode has not been redefined. |
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if ( isset( $shortcode_tags['gallery'] ) && 'gallery_shortcode' === $shortcode_tags['gallery'] ) { |
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add_filter( 'post_gallery', array( $this, 'post_gallery' ), 1002, 2 ); |
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add_filter( 'jetpack_gallery_types', array( $this, 'add_gallery_type' ), 10 ); |
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$needs_scripts = true; |
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} |
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|
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if ( $needs_scripts ) { |
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add_action( 'wp_enqueue_scripts', array( $this, 'maybe_enqueue_scripts' ), 1 ); |
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} |
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|
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/** |
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* For the moment, comment out the setting for v2.8. |
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* The remainder should work as it always has. |
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* See: https://github.com/Automattic/jetpack/pull/85/files |
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*/ |
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// add_action( 'admin_init', array( $this, 'register_settings' ), 5 ); |
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} |
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|
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/** |
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* Responds to the [gallery] shortcode, but not an actual shortcode callback. |
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* |
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* @param $value string An empty string if nothing has modified the gallery output, the output html otherwise |
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* @param $attr array The shortcode attributes array |
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* |
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* @return string The (un)modified $value |
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*/ |
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function post_gallery( $value, $attr ) { |
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// Bail if somebody else has done something |
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if ( ! empty( $value ) ) { |
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return $value; |
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} |
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|
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// If [gallery type="slideshow"] have it behave just like [slideshow] |
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if ( ! empty( $attr['type'] ) && 'slideshow' == $attr['type'] ) { |
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return $this->shortcode_callback( $attr ); |
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} |
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|
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return $value; |
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} |
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|
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/** |
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* Add the Slideshow type to gallery settings |
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* |
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* @see Jetpack_Tiled_Gallery::media_ui_print_templates |
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* |
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* @param $types array An array of types where the key is the value, and the value is the caption. |
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* |
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* @return array |
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*/ |
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function add_gallery_type( $types = array() ) { |
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$types['slideshow'] = esc_html__( 'Slideshow', 'jetpack' ); |
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|
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return $types; |
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} |
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|
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function register_settings() { |
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add_settings_section( 'slideshow_section', __( 'Image Gallery Slideshow', 'jetpack' ), '__return_empty_string', 'media' ); |
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|
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add_settings_field( 'jetpack_slideshow_background_color', __( 'Background color', 'jetpack' ), array( $this, 'slideshow_background_color_callback' ), 'media', 'slideshow_section' ); |
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|
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register_setting( 'media', 'jetpack_slideshow_background_color', array( $this, 'slideshow_background_color_sanitize' ) ); |
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} |
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|
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function slideshow_background_color_callback() { |
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$options = array( |
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'black' => __( 'Black', 'jetpack' ), |
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'white' => __( 'White', 'jetpack' ), |
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); |
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$this->settings_select( 'jetpack_slideshow_background_color', $options ); |
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} |
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|
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function settings_select( $name, $values, $extra_text = '' ) { |
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if ( empty( $name ) || empty( $values ) || ! is_array( $values ) ) { |
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return; |
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} |
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$option = get_option( $name ); |
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?> |
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<fieldset> |
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<select name="<?php echo esc_attr( $name ); ?>" id="<?php echo esc_attr( $name ); ?>"> |
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<?php foreach ( $values as $key => $value ) : ?> |
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<option value="<?php echo esc_attr( $key ); ?>" <?php selected( $key, $option ); ?>> |
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<?php echo esc_html( $value ); ?> |
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</option> |
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<?php endforeach; ?> |
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</select> |
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<?php if ( ! empty( $extra_text ) ) : ?> |
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<p class="description"><?php echo esc_html( $extra_text ); ?></p> |
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<?php endif; ?> |
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</fieldset> |
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<?php |
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} |
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|
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function slideshow_background_color_sanitize( $value ) { |
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return ( 'white' == $value ) ? 'white' : 'black'; |
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} |
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|
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function shortcode_callback( $attr ) { |
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global $post; |
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|
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$attr = shortcode_atts( |
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array( |
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'trans' => 'fade', |
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'order' => 'ASC', |
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'orderby' => 'menu_order ID', |
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'id' => $post->ID, |
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'include' => '', |
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'exclude' => '', |
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'autostart' => true, |
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'size' => '', |
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), $attr, 'slideshow' |
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); |
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|
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if ( 'rand' == strtolower( $attr['order'] ) ) { |
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$attr['orderby'] = 'none'; |
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} |
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|
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$attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] ); |
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if ( ! $attr['orderby'] ) { |
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$attr['orderby'] = 'menu_order ID'; |
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} |
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|
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if ( ! $attr['size'] ) { |
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$attr['size'] = 'full'; |
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} |
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|
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// Don't restrict to the current post if include |
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$post_parent = ( empty( $attr['include'] ) ) ? intval( $attr['id'] ) : null; |
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|
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$attachments = get_posts( |
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array( |
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'post_status' => 'inherit', |
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'post_type' => 'attachment', |
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'post_mime_type' => 'image', |
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'posts_per_page' => - 1, |
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'post_parent' => $post_parent, |
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'order' => $attr['order'], |
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'orderby' => $attr['orderby'], |
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'include' => $attr['include'], |
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'exclude' => $attr['exclude'], |
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) |
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); |
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|
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if ( count( $attachments ) < 1 ) { |
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return false; |
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} |
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|
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$gallery_instance = sprintf( 'gallery-%d-%d', $attr['id'], ++$this->instance_count ); |
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|
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$gallery = array(); |
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foreach ( $attachments as $attachment ) { |
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$attachment_image_src = wp_get_attachment_image_src( $attachment->ID, $attr['size'] ); |
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$attachment_image_src = $attachment_image_src[0]; // [url, width, height] |
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$attachment_image_title = get_the_title( $attachment->ID ); |
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$attachment_image_alt = get_post_meta( $attachment->ID, '_wp_attachment_image_alt', true ); |
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/** |
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* Filters the Slideshow slide caption. |
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* |
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* @module shortcodes |
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* |
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* @since 2.3.0 |
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* |
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* @param string wptexturize( strip_tags( $attachment->post_excerpt ) ) Post excerpt. |
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* @param string $attachment ->ID Attachment ID. |
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*/ |
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$caption = apply_filters( 'jetpack_slideshow_slide_caption', wptexturize( strip_tags( $attachment->post_excerpt ) ), $attachment->ID ); |
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|
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$gallery[] = (object) array( |
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'src' => (string) esc_url_raw( $attachment_image_src ), |
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'id' => (string) $attachment->ID, |
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'title' => (string) esc_attr( $attachment_image_title ), |
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'alt' => (string) esc_attr( $attachment_image_alt ), |
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'caption' => (string) $caption, |
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'itemprop' => 'image', |
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); |
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} |
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|
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$color = Jetpack_Options::get_option( 'slideshow_background_color', 'black' ); |
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|
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$js_attr = array( |
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'gallery' => $gallery, |
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'selector' => $gallery_instance, |
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'trans' => $attr['trans'] ? $attr['trans'] : 'fade', |
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'autostart' => $attr['autostart'] ? $attr['autostart'] : 'true', |
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'color' => $color, |
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); |
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|
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// Show a link to the gallery in feeds. |
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if ( is_feed() ) { |
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return sprintf( |
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'<a href="%s">%s</a>', |
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esc_url( get_permalink( $post->ID ) . '#' . $gallery_instance . '-slideshow' ), |
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esc_html__( 'Click to view slideshow.', 'jetpack' ) |
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); |
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} |
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|
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return $this->slideshow_js( $js_attr ); |
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} |
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|
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/** |
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* Render the slideshow js |
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* |
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* Returns the necessary markup and js to fire a slideshow. |
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* |
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* @param $attr array Attributes for the slideshow. |
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* |
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* @uses $this->enqueue_scripts() |
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* |
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* @return string HTML output. |
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*/ |
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function slideshow_js( $attr ) { |
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// Enqueue scripts |
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$this->enqueue_scripts(); |
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|
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$output = ''; |
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|
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if ( defined( 'JSON_HEX_AMP' ) ) { |
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// This is nice to have, but not strictly necessary since we use _wp_specialchars() below |
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$gallery = json_encode( $attr['gallery'], JSON_HEX_TAG | JSON_HEX_AMP | JSON_HEX_APOS | JSON_HEX_QUOT ); |
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} else { |
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$gallery = json_encode( $attr['gallery'] ); |
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} |
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|
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$output .= '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>'; |
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$output .= sprintf( |
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'<div id="%s" class="slideshow-window jetpack-slideshow slideshow-%s" data-trans="%s" data-autostart="%s" data-gallery="%s" itemscope itemtype="https://schema.org/ImageGallery"></div>', |
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esc_attr( $attr['selector'] . '-slideshow' ), |
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esc_attr( $attr['color'] ), |
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esc_attr( $attr['trans'] ), |
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esc_attr( $attr['autostart'] ), |
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/* |
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* The input to json_encode() above can contain '"'. |
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* |
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* For calls to json_encode() lacking the JSON_HEX_AMP option, |
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* that '"' is left unaltered. Running '"' through esc_attr() |
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* also leaves it unaltered since esc_attr() does not double-encode. |
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* |
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* This means we end up with an attribute like |
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* `data-gallery="{"foo":"""}"`, |
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* which is interpreted by the browser as `{"foo":"""}`, |
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* which cannot be JSON decoded. |
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* |
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* The preferred workaround is to include the JSON_HEX_AMP (and friends) |
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* options, but these are not available until 5.3.0. |
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* Alternatively, we can use _wp_specialchars( , , , true ) instead of |
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* esc_attr(), which will double-encode. |
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* |
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* Since we can't rely on JSON_HEX_AMP, we do both. |
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*/ |
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_wp_specialchars( wp_check_invalid_utf8( $gallery ), ENT_QUOTES, false, true ) |
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); |
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|
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return $output; |
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} |
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|
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/** |
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* Infinite Scroll needs the scripts to be present at all times |
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*/ |
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function maybe_enqueue_scripts() { |
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if ( is_home() && current_theme_supports( 'infinite-scroll' ) ) { |
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$this->enqueue_scripts(); |
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} |
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} |
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|
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/** |
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* Actually enqueues the scripts and styles. |
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*/ |
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function enqueue_scripts() { |
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static $enqueued = false; |
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|
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if ( $enqueued ) { |
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return; |
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} |
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|
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wp_enqueue_script( 'jquery-cycle', plugins_url( '/js/jquery.cycle.js', __FILE__ ), array( 'jquery' ), '2.9999.8', true ); |
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wp_enqueue_script( 'jetpack-slideshow', plugins_url( '/js/slideshow-shortcode.js', __FILE__ ), array( 'jquery-cycle' ), '20121214.1', true ); |
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if ( is_rtl() ) { |
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wp_enqueue_style( 'jetpack-slideshow', plugins_url( '/css/rtl/slideshow-shortcode-rtl.css', __FILE__ ) ); |
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} else { |
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wp_enqueue_style( 'jetpack-slideshow', plugins_url( '/css/slideshow-shortcode.css', __FILE__ ) ); |
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} |
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|
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wp_localize_script( |
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'jetpack-slideshow', |
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'jetpackSlideshowSettings', |
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/** |
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* Filters the slideshow JavaScript spinner. |
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* |
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* @module shortcodes |
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* |
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* @since 2.1.0 |
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* |
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* @param array $args |
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* - string - spinner - URL of the spinner image. |
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*/ |
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apply_filters( |
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'jetpack_js_slideshow_settings', array( |
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'spinner' => plugins_url( '/img/slideshow-loader.gif', __FILE__ ), |
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) |
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) |
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); |
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|
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$enqueued = true; |
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} |
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|
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public static function init() { |
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$gallery = new Jetpack_Slideshow_Shortcode; |
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} |
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} |
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|
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add_action( 'init', array( 'Jetpack_Slideshow_Shortcode', 'init' ) ); |
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|
