count-tags-for-plugins.php

<?php
/*
 * Ensure that the post_tag taxonomy uses our own special counting logic.
 *
 * Normally, this would simply be specified by register_taxonomy() with
 * the update_count_callback flag. Since we use the core tag taxonomy,
 * let's just continue to hijack it.
 */
add_action( 'init', function() {
  $GLOBALS['wp_taxonomies']['post_tag']->update_count_callback = 'jquery_update_plugin_tag_count';
} );

/**
 * Mostly just _update_post_term_count(), tweaked for post_parent = 0.
 */
function jquery_update_plugin_tag_count( $terms, $taxonomy ) {
	global $wpdb;
	foreach ( (array) $terms as $term ) {
		$count = (int) $wpdb->get_var( $wpdb->prepare( "SELECT COUNT(*) FROM $wpdb->term_relationships, $wpdb->posts WHERE $wpdb->posts.ID = $wpdb->term_relationships.object_id AND post_status = 'publish' AND post_type = 'jquery-plugin' AND post_parent = 0 AND term_taxonomy_id = %d", $term ) );
		do_action( 'edit_term_taxonomy', $term, $taxonomy );
		$wpdb->update( $wpdb->term_taxonomy, compact( 'count' ), array( 'term_taxonomy_id' => $term ) );
		do_action( 'edited_term_taxonomy', $term, $taxonomy );
	}
}