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<?php
/**
* Slideshow shortcode usage: [gallery type="slideshow"] or the older [slideshow]
*/
class Jetpack_Slideshow_Shortcode {
public $instance_count = 0;
function __construct() {
global $shortcode_tags;
$needs_scripts = false;
// Only if the slideshow shortcode has not already been defined.
if ( ! array_key_exists( 'slideshow', $shortcode_tags ) ) {
add_shortcode( 'slideshow', array( $this, 'shortcode_callback' ) );
$needs_scripts = true;
}
// Only if the gallery shortcode has not been redefined.
if ( isset( $shortcode_tags['gallery'] ) && $shortcode_tags['gallery'] == 'gallery_shortcode' ) {
add_filter( 'post_gallery', array( $this, 'post_gallery' ), 1002, 2 );
add_filter( 'jetpack_gallery_types', array( $this, 'add_gallery_type' ), 10 );
$needs_scripts = true;
}
if ( $needs_scripts )
add_action( 'wp_enqueue_scripts', array( $this, 'maybe_enqueue_scripts' ), 1 );
}
/**
* Responds to the [gallery] shortcode, but not an actual shortcode callback.
*
* @param $value An empty string if nothing has modified the gallery output, the output html otherwise
* @param $attr The shortcode attributes array
*
* @return string The (un)modified $value
*/
function post_gallery( $value, $attr ) {
// Bail if somebody else has done something
if ( ! empty( $value ) )
return $value;
// If [gallery type="slideshow"] have it behave just like [slideshow]
if ( ! empty( $attr['type'] ) && 'slideshow' == $attr['type'] )
return $this->shortcode_callback( $attr );
return $value;
}
/**
* Add the Slideshow type to gallery settings
*
* @param $types An array of types where the key is the value, and the value is the caption.
* @see Jetpack_Tiled_Gallery::media_ui_print_templates
*/
function add_gallery_type( $types = array() ) {
$types['slideshow'] = esc_html__( 'Slideshow', 'jetpack' );
return $types;
}
function shortcode_callback( $attr, $content = null ) {
global $post, $content_width;
$attr = shortcode_atts( array(
'trans' => 'fade',
'order' => 'ASC',
'orderby' => 'menu_order ID',
'id' => $post->ID,
'include' => '',
'exclude' => '',
), $attr );
if ( 'rand' == strtolower( $attr['order'] ) )
$attr['orderby'] = 'none';
$attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] );
if ( ! $attr['orderby'] )
$attr['orderby'] = 'menu_order ID';
// Don't restrict to the current post if include
$post_parent = ( empty( $attr['include'] ) ) ? intval( $attr['id'] ) : null;
$attachments = get_posts( array(
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
'posts_per_page' => -1,
'post_parent' => $post_parent,
'order' => $attr['order'],
'orderby' => $attr['orderby'],
'include' => $attr['include'],
'exclude' => $attr['exclude'],
) );
if ( count( $attachments ) < 2 )
return;
$gallery_instance = sprintf( "gallery-%d-%d", $attr['id'], ++$this->instance_count );
$gallery = array();
foreach ( $attachments as $attachment ) {
$attachment_image_src = wp_get_attachment_image_src( $attachment->ID, 'full' );
$attachment_image_src = $attachment_image_src[0]; // [url, width, height]
$caption = wptexturize( strip_tags( $attachment->post_excerpt ) );
$gallery[] = (object) array(
'src' => (string) esc_url_raw( $attachment_image_src ),
'id' => (string) $attachment->ID,
'caption' => (string) $caption,
);
}
$max_width = intval( get_option( 'large_size_w' ) );
$max_height = 450;
if ( intval( $content_width ) > 0 )
$max_width = min( intval( $content_width ), $max_width );
$js_attr = array(
'gallery' => $gallery,
'selector' => $gallery_instance,
'width' => $max_width,
'height' => $max_height,
'trans' => $attr['trans'] ? $attr['trans'] : 'fade',
);
// Show a link to the gallery in feeds.
if ( is_feed() )
return sprintf( '<a href="%s">%s</a>',
esc_url( get_permalink( $post->ID ) . '#' . $gallery_instance . '-slideshow' ),
esc_html__( 'Click to view slideshow.', 'jetpack' )
);
return $this->slideshow_js( $js_attr );
}
/**
* Render the slideshow js
*
* Returns the necessary markup and js to fire a slideshow.
*
* @uses $this->enqueue_scripts()
*/
function slideshow_js( $attr ) {
// Enqueue scripts
$this->enqueue_scripts();
if ( $attr['width'] <= 100 )
$attr['width'] = 450;
if ( $attr['height'] <= 100 )
$attr['height'] = 450;
// 40px padding
$attr['width'] -= 40;
$attr['height'] -= 40;
$output = '';
$output .= '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>';
$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>';
$output .= "
<style>
#{$attr['selector']}-slideshow .slideshow-slide img {
max-height: " . intval( $attr['height'] ) ."px;
/* Emulate max-height in IE 6 */
_height: expression(this.scrollHeight >= " . intval( $attr['height'] ) . " ? '" . intval( $attr['height'] ) . "px' : 'auto');
}
</style>
";
return $output;
}
/**
* Infinite Scroll needs the scripts to be present at all times
*/
function maybe_enqueue_scripts() {
if ( is_home() && current_theme_supports( 'infinite-scroll' ) )
$this->enqueue_scripts();
}
/**
* Actually enqueues the scripts and styles.
*/
function enqueue_scripts() {
static $enqueued = false;
if ( $enqueued )
return;
wp_enqueue_script( 'jquery-cycle', plugins_url( '/js/jquery.cycle.js', __FILE__ ) , array( 'jquery' ), '2.9999.8', true );
wp_enqueue_script( 'jetpack-slideshow', plugins_url( '/js/slideshow-shortcode.js', __FILE__ ), array( 'jquery-cycle' ), '20121214.1', true );
wp_enqueue_style( 'jetpack-slideshow', plugins_url( '/css/slideshow-shortcode.css', __FILE__ ) );
wp_localize_script( 'jetpack-slideshow', 'jetpackSlideshowSettings', apply_filters( 'jetpack_js_slideshow_settings', array(
'spinner' => plugins_url( '/img/slideshow-loader.gif', __FILE__ ),
) ) );
$enqueued = true;
}
public static function init() {
$gallery = new Jetpack_Slideshow_Shortcode;
}
}
add_action( 'init', array( 'Jetpack_Slideshow_Shortcode', 'init' ) );
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