how to have the gallery shortcode output one single UL list instead of several DL?

2 comments

1. You can use the the following attributes for the gallery shortcode:

   [gallery itemtag="ul" icontag="li" captiontag="li"]
   

   The problem with this is that the gallery shortcode wraps the image and the caption in different elements(thats why the default solution is using dl-dt-dd), so this will generate one li element for the image, and one for the caption. You can still style it using CSS though, because both of the element has unique classnames.

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2. Ok, so I rewrote the gallery shortcode function by copying the original and removing/adding/changing what I needed, and now I share it with you. The major things I added/changed are:

   • One single UL/LI list per gallery instead of a DL for each damned item..
   • Removed ‘itemtag’ attr, since there’s no point in using another tag for items inside an UL
   • ‘icontag’ now defaults to ‘figure’, ‘captiontag’ now defaults to ‘p’
   • new ‘class’ attr for adding a custom class to the container UL
   • new ‘first-in-row’, ‘last-in-row’, ‘first-row’, ‘last-row’ helper classes for LI items (though I strongly recommend to use nth-child css selectors instead)

   Here’s the code:

   //remove styles: I'll use mine
   add_filter('use_default_gallery_style','__return_false');
   
   
   //remove default shortcode
   remove_shortcode('gallery');
   //add new shortcode
   add_shortcode('gallery', 'custom_gallery');
   
   function custom_gallery($attr) {
     $post = get_post();
   
     static $instance = 0;
     $instance++;
   
     if(!empty($attr['ids'])){
       // 'ids' is explicitly ordered, unless you specify otherwise.
       if(empty($attr['orderby'])){ $attr['orderby'] = 'post__in'; }
       $attr['include'] = $attr['ids'];
     }
   
     $output = '';
   
     // We're trusting author input, so let's at least make sure it looks like a valid orderby statement
     if(isset($attr['orderby'])){
       $attr['orderby'] = sanitize_sql_orderby($attr['orderby']);
       if(!$attr['orderby']) unset($attr['orderby']);
     }
   
     extract(shortcode_atts(array(
       'order'      => 'ASC',
       'orderby'    => 'menu_order ID',
       'id'         => $post ? $post->ID : 0,
       'icontag'    => 'figure',
       'captiontag' => 'p',
       'columns'    => 3,
       'size'       => 'thumbnail',
       'include'    => '',
       'exclude'    => '',
       'link'       => '',
       'class'      => ''//now you can add custom class to container UL 
     ), $attr, 'gallery'));
   
     $id = intval($id);
   
     if('RAND' == $order) $orderby = 'none';
   
     if(!empty($include)){
       $_attachments = get_posts(array(
         'include' => $include,
         'post_status' => 'inherit',
         'post_type' => 'attachment',
         'post_mime_type' => 'image',
         'order' => $order,
         'orderby' => $orderby
       ));
   
       $attachments = array();
       foreach($_attachments as $key => $val){
         $attachments[$val->ID] = $_attachments[$key];
       }
     } elseif (!empty($exclude)){
       $attachments = get_children(array(
         'post_parent' => $id,
         'exclude' => $exclude,
         'post_status' => 'inherit',
         'post_type' => 'attachment',
         'post_mime_type' => 'image',
         'order' => $order,
         'orderby' => $orderby
       ));
     } else {
       $attachments = get_children(array(
         'post_parent' => $id,
         'post_status' => 'inherit',
         'post_type' => 'attachment',
         'post_mime_type' => 'image',
         'order' => $order,
         'orderby' => $orderby
       ));
     }
   
     if(empty($attachments)) return '';
   
     //if ( is_feed() ) //removed, see original in media.php
   
   
     $itemtag = tag_escape('li');//new tag for item 
     $captiontag = tag_escape($captiontag);
     $icontag = tag_escape($icontag);
   
     //valid tags check removed, see original in media.php
   
     $columns = intval($columns);
     $selector = "gallery-{$instance}";
   
     $size_class = sanitize_html_class( $size );
   
     //new tag for container 
     $output = "<ul id='$selector' class='gallery galleryid-{$id} gallery-columns-{$columns} gallery-size-{$size_class} {$class}'>";
   
     $i = 0;
     $c = count($attachments);
     $o = (int)floor($c/$columns)*$columns;
   
     foreach ( $attachments as $id => $attachment ) {
       if(!empty($link) && 'file' === $link) $image_output = wp_get_attachment_link($id,$size,false,false);
       elseif(!empty($link) && 'none' === $link) $image_output = wp_get_attachment_image($id,$size,false);
       else $image_output = wp_get_attachment_link( $id, $size, true, false );
       $image_meta = wp_get_attachment_metadata($id);
       $orientation = '';
       if(isset($image_meta['height'], $image_meta['width'])) $orientation = ($image_meta['height'] > $image_meta['width']) ? 'portrait' : 'landscape';
   
       //setup custom aux classes to help style
       $m = ++$i % $columns;
       $item_pos_class = ($m == 1) ? 'first-in-row' : (($m == 0) ? 'last-in-row' : '');
       $row_class = ($i <= $columns) ? 'first-row' : (($i > $o) ? 'last-row' : '');
   
       //added: custom aux classes
       $output .= "<{$itemtag} class='gallery-item {$item_pos_class} {$row_class}'>";
       $output .= "<{$icontag} class='gallery-icon {$orientation}'>$image_output</{$icontag}>";
       if($captiontag && trim($attachment->post_excerpt)){
         $output .= "<{$captiontag} class='wp-caption-text gallery-caption'>" . wptexturize($attachment->post_excerpt) . "</{$captiontag}>";
       }
       $output .= "</{$itemtag}>";
     }
   
     //changed BR>clear:both with a more conventional clearfix div
     $output .= "</ul>n<div class='clearfix'></div>";
   
     return $output;
   }//end custom gallery
   

   And just to complete the gallery shortcode “chapter”, here I show you how to eventually programmatically change the default and/or user defined attributes. Say for example I need to change the size attr based on number of items:

   add_filter('shortcode_atts_gallery','set_gallery_thumbs_size',10,3);
   
   function set_gallery_thumbs_size($out, $pairs, $atts) {
   
     //in this case, if size was defined by the user, keep original and stop here
     if(isset($atts['size'])) return $out;
   
     //get number of images
     $c = count(explode(',',$atts['ids']));
     //set different sizes based on items count
     //new sizes were created with add_image_size() and image_size_names_choose filter (see wp docs)
     $atts['size'] = ($c > 2) ? 'thumb-3c' : ( ($c > 1) ? 'thumb-2c' : 'thumbnail');
     //merge original array with new one and return it
     return array_merge($out,$atts);
   }
   

   Hope it will help other people searching for a cleaner gallery markup.

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