Untitled

<?php
/**
 * WordPress Chosen Taxonomy Metabox
 * Author: Helen Hou-Sandi
 *
 * Use Chosen for a replacement taxonomy metabox in WordPress
 * Useful for taxonomies that aren't changed much on the fly,
 * as Chosen is for selection only.
 * You can always use the taxonomy admin screen to add/edit taxonomy terms.
 *
 * Example screenshot: http://cl.ly/2T2D232x172G353i2V2C
 *
 * Chosen: http://harvesthq.github.com/chosen/
 */

add_action( 'admin_init', 'hhs_add_meta_boxes', 1 );
function hhs_add_meta_boxes() {
        add_meta_box( 'chosen-tax', 'Choose Terms', 'hhs_chosen_tax_meta_box_display', 'post', 'side', 'default' );
}

function hhs_chosen_tax_meta_box_display() {
        global $post;

        wp_nonce_field( 'hhs_chosen_tax_meta_box_nonce', 'hhs_chosen_tax_meta_box_nonce' );
        ?>
        <script type="text/javascript">
        jQuery(document).ready(function($){
                $( '.chzn-select' ).chosen();
        });
        </script>
        <?php
        // which taxonomies should be used - can be multiple
        $taxes = array(
                'post_tag' => 'Tags',
        );

        foreach ( $taxes as $tax => $label ) {
                // add more args if you want (e.g. orderby)
                $terms = get_terms( $tax, array( 'hide_empty' => 0 ) );
                $current_terms = wp_get_post_terms ( $post->ID, $tax, array('fields' => 'ids') );
                ?>
                <p><label for="<?php echo $tax; ?>"><?php echo $label; ?></label>:</p>
                <p><select name="<?php echo $tax; ?>[]" class="chzn-select widefat" data-placeholder="Select one or more" multiple="multiple">
                <?php foreach ( $terms as $term ) { ?>
                        <option value="<?php echo $term->slug; ?>"<?php selected( in_array( $term->term_id, $current_terms ) ); ?>><?php echo $term->name; ?></option>
                <?php } ?>
                </select>
                </p>
                <?php
        }
}
add_action( 'save_post', 'hhs_chosen_tax_meta_box_display_save' );
function hhs_chosen_tax_meta_box_display_save( $post_id ) {

        // verify nonce
        if ( ! isset( $_POST['hhs_chosen_tax_meta_box_nonce'] ) ||
             ! wp_verify_nonce( $_POST['hhs_chosen_tax_meta_box_nonce'], 'hhs_chosen_tax_meta_box_nonce' ) )
                return;

        // check autosave - maybe overkill?
        if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE )
                return;

        // check permissions
        if ( ! current_user_can( 'edit_post', $post_id ) )
                return;

        // change to match above, or be a good coder and don't dupe this
        $taxes = array (
                'post_tag',
        );

        foreach ( $taxes as $tax ) {
                if ( isset( $_POST[$tax] ) && is_array( $_POST[$tax] ) )
                        wp_set_post_terms( $post_id, $_POST[$tax], $tax, false );
        }
}

// Chosen JS and CSS enqueue - assumes you are doing this in a theme
// with the JS, CSS, and sprite files in themefolder/js/chosen/
// You'd want to use plugins_url() instead if using this in a plugin
add_action( 'admin_enqueue_scripts', 'hhs_add_admin_scripts', 10, 1 );
function hhs_add_admin_scripts( $hook ) {
        global $post;

        // There's probably a better way to check the screen...
        if ( $hook == 'post-new.php' || $hook == 'post.php' ) {
                if ( 'post' === $post->post_type ) {
                        wp_enqueue_script(  'chosen', get_template_directory_uri().'/js/chosen/chosen.jquery.min.js', array( 'jquery' ), '1.0' );
                        wp_enqueue_style( 'chosen', get_template_directory_uri().'/js/chosen/chosen.css' );
                }
        }
}

// Hide unused taxonomy metabox(es)
add_action( 'do_meta_boxes', 'hhs_remove_tax_meta_boxes', 10, 3 );
function hhs_remove_tax_meta_boxes( $post_type, $priority, $post ) {
        remove_meta_box( 'tagsdiv-post_tag', 'post', 'side' );
}
?>