slideshow.php
| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Slideshow shortcode usage: [gallery type="slideshow"] or the older [slideshow] |
| 5 | */ |
| 6 | class Jetpack_Slideshow_Shortcode { |
| 7 | public $instance_count = 0; |
| 8 | |
| 9 | function __construct() { |
| 10 | global $shortcode_tags; |
| 11 | |
| 12 | $needs_scripts = false; |
| 13 | |
| 14 | // Only if the slideshow shortcode has not already been defined. |
| 15 | if ( ! array_key_exists( 'slideshow', $shortcode_tags ) ) { |
| 16 | add_shortcode( 'slideshow', array( $this, 'shortcode_callback' ) ); |
| 17 | $needs_scripts = true; |
| 18 | } |
| 19 | |
| 20 | // Only if the gallery shortcode has not been redefined. |
| 21 | if ( isset( $shortcode_tags['gallery'] ) && $shortcode_tags['gallery'] == 'gallery_shortcode' ) { |
| 22 | add_filter( 'post_gallery', array( $this, 'post_gallery' ), 1002, 2 ); |
| 23 | add_filter( 'jetpack_gallery_types', array( $this, 'add_gallery_type' ), 10 ); |
| 24 | $needs_scripts = true; |
| 25 | } |
| 26 | |
| 27 | if ( $needs_scripts ) |
| 28 | add_action( 'wp_enqueue_scripts', array( $this, 'maybe_enqueue_scripts' ), 1 ); |
| 29 | } |
| 30 | |
| 31 | /** |
| 32 | * Responds to the [gallery] shortcode, but not an actual shortcode callback. |
| 33 | * |
| 34 | * @param $value An empty string if nothing has modified the gallery output, the output html otherwise |
| 35 | * @param $attr The shortcode attributes array |
| 36 | * |
| 37 | * @return string The (un)modified $value |
| 38 | */ |
| 39 | function post_gallery( $value, $attr ) { |
| 40 | // Bail if somebody else has done something |
| 41 | if ( ! empty( $value ) ) |
| 42 | return $value; |
| 43 | |
| 44 | // If [gallery type="slideshow"] have it behave just like [slideshow] |
| 45 | if ( ! empty( $attr['type'] ) && 'slideshow' == $attr['type'] ) |
| 46 | return $this->shortcode_callback( $attr ); |
| 47 | |
| 48 | return $value; |
| 49 | } |
| 50 | |
| 51 | /** |
| 52 | * Add the Slideshow type to gallery settings |
| 53 | * |
| 54 | * @param $types An array of types where the key is the value, and the value is the caption. |
| 55 | * @see Jetpack_Tiled_Gallery::media_ui_print_templates |
| 56 | */ |
| 57 | function add_gallery_type( $types = array() ) { |
| 58 | $types['slideshow'] = esc_html__( 'Slideshow', 'jetpack' ); |
| 59 | return $types; |
| 60 | } |
| 61 | |
| 62 | function shortcode_callback( $attr, $content = null ) { |
| 63 | global $post, $content_width; |
| 64 | |
| 65 | $attr = shortcode_atts( array( |
| 66 | 'trans' => 'fade', |
| 67 | 'order' => 'ASC', |
| 68 | 'orderby' => 'menu_order ID', |
| 69 | 'id' => $post->ID, |
| 70 | 'include' => '', |
| 71 | 'exclude' => '', |
| 72 | ), $attr ); |
| 73 | |
| 74 | if ( 'rand' == strtolower( $attr['order'] ) ) |
| 75 | $attr['orderby'] = 'none'; |
| 76 | |
| 77 | $attr['orderby'] = sanitize_sql_orderby( $attr['orderby'] ); |
| 78 | if ( ! $attr['orderby'] ) |
| 79 | $attr['orderby'] = 'menu_order ID'; |
| 80 | |
| 81 | // Don't restrict to the current post if include |
| 82 | $post_parent = ( empty( $attr['include'] ) ) ? intval( $attr['id'] ) : null; |
| 83 | |
| 84 | $attachments = get_posts( array( |
| 85 | 'post_status' => 'inherit', |
| 86 | 'post_type' => 'attachment', |
| 87 | 'post_mime_type' => 'image', |
| 88 | 'posts_per_page' => -1, |
| 89 | 'post_parent' => $post_parent, |
| 90 | 'order' => $attr['order'], |
| 91 | 'orderby' => $attr['orderby'], |
| 92 | 'include' => $attr['include'], |
| 93 | 'exclude' => $attr['exclude'], |
| 94 | ) ); |
| 95 | |
| 96 | if ( count( $attachments ) < 2 ) |
| 97 | return; |
| 98 | |
| 99 | $gallery_instance = sprintf( "gallery-%d-%d", $attr['id'], ++$this->instance_count ); |
| 100 | |
| 101 | $gallery = array(); |
| 102 | foreach ( $attachments as $attachment ) { |
| 103 | $attachment_image_src = wp_get_attachment_image_src( $attachment->ID, 'full' ); |
| 104 | $attachment_image_src = $attachment_image_src[0]; // [url, width, height] |
| 105 | $caption = apply_filters( 'jetpack_slideshow_slide_caption', wptexturize( strip_tags( $attachment->post_excerpt ) ), $attachment->ID ); |
| 106 | |
| 107 | $gallery[] = (object) array( |
| 108 | 'src' => (string) esc_url_raw( $attachment_image_src ), |
| 109 | 'id' => (string) $attachment->ID, |
| 110 | 'caption' => (string) $caption, |
| 111 | ); |
| 112 | } |
| 113 | |
| 114 | $max_width = intval( get_option( 'large_size_w' ) ); |
| 115 | $max_height = 450; |
| 116 | if ( intval( $content_width ) > 0 ) |
| 117 | $max_width = min( intval( $content_width ), $max_width ); |
| 118 | |
| 119 | $js_attr = array( |
| 120 | 'gallery' => $gallery, |
| 121 | 'selector' => $gallery_instance, |
| 122 | 'width' => $max_width, |
| 123 | 'height' => $max_height, |
| 124 | 'trans' => $attr['trans'] ? $attr['trans'] : 'fade', |
| 125 | ); |
| 126 | |
| 127 | // Show a link to the gallery in feeds. |
| 128 | if ( is_feed() ) |
| 129 | return sprintf( '<a href="%s">%s</a>', |
| 130 | esc_url( get_permalink( $post->ID ) . '#' . $gallery_instance . '-slideshow' ), |
| 131 | esc_html__( 'Click to view slideshow.', 'jetpack' ) |
| 132 | ); |
| 133 | |
| 134 | return $this->slideshow_js( $js_attr ); |
| 135 | } |
| 136 | |
| 137 | /** |
| 138 | * Render the slideshow js |
| 139 | * |
| 140 | * Returns the necessary markup and js to fire a slideshow. |
| 141 | * |
| 142 | * @uses $this->enqueue_scripts() |
| 143 | */ |
| 144 | function slideshow_js( $attr ) { |
| 145 | // Enqueue scripts |
| 146 | $this->enqueue_scripts(); |
| 147 | |
| 148 | if ( $attr['width'] <= 100 ) |
| 149 | $attr['width'] = 450; |
| 150 | |
| 151 | if ( $attr['height'] <= 100 ) |
| 152 | $attr['height'] = 450; |
| 153 | |
| 154 | // 40px padding |
| 155 | $attr['width'] -= 40; |
| 156 | $attr['height'] -= 40; |
| 157 | |
| 158 | $output = ''; |
| 159 | |
| 160 | $output .= '<p class="jetpack-slideshow-noscript robots-nocontent">' . esc_html__( 'This slideshow requires JavaScript.', 'jetpack' ) . '</p>'; |
| 161 | $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>'; |
| 162 | |
| 163 | $output .= " |
| 164 | <style> |
| 165 | #{$attr['selector']}-slideshow .slideshow-slide img { |
| 166 | max-height: " . intval( $attr['height'] ) ."px; |
| 167 | /* Emulate max-height in IE 6 */ |
| 168 | _height: expression(this.scrollHeight >= " . intval( $attr['height'] ) . " ? '" . intval( $attr['height'] ) . "px' : 'auto'); |
| 169 | } |
| 170 | </style> |
| 171 | "; |
| 172 | |
| 173 | return $output; |
| 174 | } |
| 175 | |
| 176 | /** |
| 177 | * Infinite Scroll needs the scripts to be present at all times |
| 178 | */ |
| 179 | function maybe_enqueue_scripts() { |
| 180 | if ( is_home() && current_theme_supports( 'infinite-scroll' ) ) |
| 181 | $this->enqueue_scripts(); |
| 182 | } |
| 183 | |
| 184 | /** |
| 185 | * Actually enqueues the scripts and styles. |
| 186 | */ |
| 187 | function enqueue_scripts() { |
| 188 | static $enqueued = false; |
| 189 | |
| 190 | if ( $enqueued ) |
| 191 | return; |
| 192 | |
| 193 | wp_enqueue_script( 'jquery-cycle', plugins_url( '/js/jquery.cycle.js', __FILE__ ) , array( 'jquery' ), '2.9999.8', true ); |
| 194 | wp_enqueue_script( 'jetpack-slideshow', plugins_url( '/js/slideshow-shortcode.js', __FILE__ ), array( 'jquery-cycle' ), '20121214.1', true ); |
| 195 | wp_enqueue_style( 'jetpack-slideshow', plugins_url( '/css/slideshow-shortcode.css', __FILE__ ) ); |
| 196 | |
| 197 | wp_localize_script( 'jetpack-slideshow', 'jetpackSlideshowSettings', apply_filters( 'jetpack_js_slideshow_settings', array( |
| 198 | 'spinner' => plugins_url( '/img/slideshow-loader.gif', __FILE__ ), |
| 199 | ) ) ); |
| 200 | |
| 201 | $enqueued = true; |
| 202 | } |
| 203 | |
| 204 | public static function init() { |
| 205 | $gallery = new Jetpack_Slideshow_Shortcode; |
| 206 | } |
| 207 | } |
| 208 | add_action( 'init', array( 'Jetpack_Slideshow_Shortcode', 'init' ) ); |
| 209 |