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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'] ) && $shortcode_tags['gallery'] == 'gallery_shortcode' ) { |
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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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* Responds to the [gallery] shortcode, but not an actual shortcode callback. |
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* |
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* @param $value An empty string if nothing has modified the gallery output, the output html otherwise |
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* @param $attr 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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// 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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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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* @param $types An array of types where the key is the value, and the value is the caption. |
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* @see Jetpack_Tiled_Gallery::media_ui_print_templates |
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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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return $types; |
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} |
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|
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function shortcode_callback( $attr, $content = null ) { |
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global $post, $content_width; |
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|
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$attr = shortcode_atts( 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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), $attr ); |
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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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$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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// 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( 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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if ( count( $attachments ) < 2 ) |
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return; |
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|
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$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( $attachment->ID, 'full' ); |
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$attachment_image_src = $attachment_image_src[0]; // [url, width, height] |
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$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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'caption' => (string) $caption, |
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); |
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} |
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|
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$max_width = intval( get_option( 'large_size_w' ) ); |
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$max_height = 450; |
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if ( intval( $content_width ) > 0 ) |
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$max_width = min( intval( $content_width ), $max_width ); |
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|
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$js_attr = array( |
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'gallery' => $gallery, |
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'selector' => $gallery_instance, |
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'width' => $max_width, |
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'height' => $max_height, |
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'trans' => $attr['trans'] ? $attr['trans'] : 'fade', |
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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( '<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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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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* @uses $this->enqueue_scripts() |
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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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if ( $attr['width'] <= 100 ) |
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$attr['width'] = 450; |
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|
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if ( $attr['height'] <= 100 ) |
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$attr['height'] = 450; |
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|
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// 40px padding |
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$attr['width'] -= 40; |
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$attr['height'] -= 40; |
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|
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$output = ''; |
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|
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$output .= '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>'; |
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$output .= '<div id="' . esc_attr( $attr['selector'] . '-slideshow' ) . '" class="slideshow-window jetpack-slideshow" data-width="' . esc_attr( $attr['width'] ) . '" data-height="' . esc_attr( $attr['height'] ) . '" data-trans="' . esc_attr( $attr['trans'] ) . '" data-gallery="' . esc_attr( json_encode( $attr['gallery'] ) ) . '"></div>'; |
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|
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$output .= " |
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<style> |
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#{$attr['selector']}-slideshow .slideshow-slide img { |
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max-height: " . intval( $attr['height'] ) ."px; |
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/* Emulate max-height in IE 6 */ |
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_height: expression(this.scrollHeight >= " . intval( $attr['height'] ) . " ? '" . intval( $attr['height'] ) . "px' : 'auto'); |
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} |
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</style> |
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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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* 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 ( $enqueued ) |
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return; |
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|
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wp_enqueue_script( 'jquery-cycle', plugins_url( '/js/jquery.cycle.js', __FILE__ ) , array( 'jquery' ), '2.9999.8', true ); |
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wp_enqueue_script( 'jetpack-slideshow', plugins_url( '/js/slideshow-shortcode.js', __FILE__ ), array( 'jquery-cycle' ), '20121214.1', true ); |
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wp_enqueue_style( 'jetpack-slideshow', plugins_url( '/css/slideshow-shortcode.css', __FILE__ ) ); |
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|
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wp_localize_script( 'jetpack-slideshow', 'jetpackSlideshowSettings', apply_filters( 'jetpack_js_slideshow_settings', array( |
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'spinner' => plugins_url( '/img/slideshow-loader.gif', __FILE__ ), |
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) ) ); |
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|
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$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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add_action( 'init', array( 'Jetpack_Slideshow_Shortcode', 'init' ) ); |
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|
