/wp-content/themes/modernize/include/plugin/dropdown-menus.php

<?php

/*

Plugin Name: Dropdown Menus

Plugin URI: http://interconnectit.com/?p=2190

Description: Outputs WordPress Menus as a dropdown. Use the widget or the function <code>dropdown_menu();</code> with the same arguments as <code>wp_nav_menu();</code>.

Author: Robert O'Rourke @ interconnect/it

Version: 0.5

Author URI: http://interconnectit.com

*/



/*

Changelog:



0.5:

	improved backwards compat with getElementsByClassName. Works back to IE 5.5. Thanks to Rob Nyman http://code.google.com/p/getelementsbyclassname/



0.4:

	added the use of the menu name as the blank item text

	fixed it for when the menu object wasn't present if called via theme_location

	changed white space to reflect coding guidelines



0.3:

	added an argument to alter the blanking text, empty to not have it all together, and an improved filter that passes $args

	changed widget class name



*/



// pretty useless without this

if ( ! function_exists( 'wp_nav_menu' ) )

	return false;





/**

 * Tack on the blank option for urls not in the menu

 */

add_filter( 'wp_nav_menu_items', 'dropdown_add_blank_item', 10, 2 );

function dropdown_add_blank_item( $items, $args ) {

	if ( isset( $args->walker ) && is_object( $args->walker ) && method_exists( $args->walker, 'is_dropdown' ) ) {

		if ( ( ! isset( $args->menu ) || empty( $args->menu ) ) && isset( $args->theme_location ) ) {

			$theme_locations = get_nav_menu_locations();

			$args->menu = wp_get_nav_menu_object( $theme_locations[ $args->theme_location ] );

		}

		$title = isset( $args->dropdown_title ) ? wptexturize( $args->dropdown_title ) : '&mdash; ' . $args->menu->name . ' &mdash;';

		if ( ! empty( $title ) )

			$items = '<option value="" class="blank">' . apply_filters( 'dropdown_blank_item_text', $title, $args ) . '</option>' . $items;

	}

	return $items;

}





/**

 * Remove empty options created in the sub levels output

 */

add_filter( 'wp_nav_menu_items', 'dropdown_remove_empty_items', 10, 2 );

function dropdown_remove_empty_items( $items, $args ) {

	if ( isset( $args->walker ) && is_object( $args->walker ) && method_exists( $args->walker, 'is_dropdown' ) )

		$items = str_replace( "<option></option>", "", $items );

	return $items;

}





/**

 * Script to make it go (no jquery! (for once))

 */

add_action( 'wp_footer', 'dropdown_javascript' );

function dropdown_javascript() {

	if ( is_admin() ) return; ?>

	<script>

		var getElementsByClassName=function(a,b,c){if(document.getElementsByClassName){getElementsByClassName=function(a,b,c){c=c||document;var d=c.getElementsByClassName(a),e=b?new RegExp("\\b"+b+"\\b","i"):null,f=[],g;for(var h=0,i=d.length;h<i;h+=1){g=d[h];if(!e||e.test(g.nodeName)){f.push(g)}}return f}}else if(document.evaluate){getElementsByClassName=function(a,b,c){b=b||"*";c=c||document;var d=a.split(" "),e="",f="http://www.w3.org/1999/xhtml",g=document.documentElement.namespaceURI===f?f:null,h=[],i,j;for(var k=0,l=d.length;k<l;k+=1){e+="[contains(concat(' ', @class, ' '), ' "+d[k]+" ')]"}try{i=document.evaluate(".//"+b+e,c,g,0,null)}catch(m){i=document.evaluate(".//"+b+e,c,null,0,null)}while(j=i.iterateNext()){h.push(j)}return h}}else{getElementsByClassName=function(a,b,c){b=b||"*";c=c||document;var d=a.split(" "),e=[],f=b==="*"&&c.all?c.all:c.getElementsByTagName(b),g,h=[],i;for(var j=0,k=d.length;j<k;j+=1){e.push(new RegExp("(^|\\s)"+d[j]+"(\\s|$)"))}for(var l=0,m=f.length;l<m;l+=1){g=f[l];i=false;for(var n=0,o=e.length;n<o;n+=1){i=e[n].test(g.className);if(!i){break}}if(i){h.push(g)}}return h}}return getElementsByClassName(a,b,c)},

			dropdowns = getElementsByClassName( 'dropdown-menu' );

		for ( i=0; i<dropdowns.length; i++ )

			dropdowns[i].onchange = function(){ if ( this.value != '' ) window.location.href = this.value; }

	</script>

	<?php

}





/**

 * Overrides the walker argument and container argument then calls wp_nav_menu

 */

function dropdown_menu( $args ) {

	// enforce these arguments so it actually works

	$args[ 'walker' ] = new DropDown_Nav_Menu();

	$args[ 'items_wrap' ] = '<select id="%1$s" class="%2$s dropdown-menu">%3$s</select>';



	// custom args for controlling indentation of sub menu items

	$args[ 'indent_string' ] = isset( $args[ 'indent_string' ] ) ? $args[ 'indent_string' ] : '&ndash;&nbsp;';

	$args[ 'indent_after' ] =  isset( $args[ 'indent_after' ] ) ? $args[ 'indent_after' ] : '';



	wp_nav_menu( $args );

}





class DropDown_Nav_Menu extends Walker_Nav_Menu {



	// easy way to check it's this walker we're using to mod the output

	function is_dropdown() {

		return true;

	}



	/**

	 * @see Walker::start_lvl()

	 * @since 3.0.0

	 *

	 * @param string $output Passed by reference. Used to append additional content.

	 * @param int $depth Depth of page. Used for padding.

	 */

	function start_lvl( &$output, $depth ) {

		$output .= "</option>";

	}



	/**

	 * @see Walker::end_lvl()

	 * @since 3.0.0

	 *

	 * @param string $output Passed by reference. Used to append additional content.

	 * @param int $depth Depth of page. Used for padding.

	 */

	function end_lvl( &$output, $depth ) {

		$output .= "<option>";

	}



	/**

	 * @see Walker::start_el()

	 * @since 3.0.0

	 *

	 * @param string $output Passed by reference. Used to append additional content.

	 * @param object $item Menu item data object.

	 * @param int $depth Depth of menu item. Used for padding.

	 * @param int $current_page Menu item ID.

	 * @param object $args

	 */

	function start_el( &$output, $item, $depth, $args ) {

		global $wp_query;

		$indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';



		$class_names = $value = '';



		$classes = empty( $item->classes ) ? array() : (array) $item->classes;

		$classes[] = 'menu-item-' . $item->ID;

		$classes[] = 'menu-item-depth-' . $depth;



		$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_unique( array_filter( $classes ) ), $item, $args ) );

		$class_names = ' class="' . esc_attr( $class_names ) . '"';



		// select current item

		$selected = in_array( 'current-menu-item', $classes ) ? ' selected="selected"' : '';



		$output .= $indent . '<option' . $class_names .' value="'. $item->url .'"'. $selected .'>';



		// push sub-menu items in as we can't nest optgroups

		$indent_string = str_repeat( apply_filters( 'dropdown_menus_indent_string', $args->indent_string, $item, $depth, $args ), ( $depth ) ? $depth : 0 );

		$indent_string .= !empty( $indent_string ) ? apply_filters( 'dropdown_menus_indent_after', $args->indent_after, $item, $depth, $args ) : '';



		$item_output = $args->before . $indent_string;

		$item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;

		$item_output .= $args->after;



		$output .= apply_filters( 'walker_nav_menu_dropdown_start_el', $item_output, $item, $depth, $args );

	}



	/**

	 * @see Walker::end_el()

	 * @since 3.0.0

	 *

	 * @param string $output Passed by reference. Used to append additional content.

	 * @param object $item Page data object. Not used.

	 * @param int $depth Depth of page. Not Used.

	 */

	function end_el( &$output, $item, $depth ) {

		$output .= apply_filters( 'walker_nav_menu_dropdown_end_el', "</option>\n", $item, $depth);

	}

}



/**

 * Navigation DropDown Menu widget class

 */

class DropDown_Menu_Widget extends WP_Widget {



	function __construct() {

		$widget_ops = array( 'classname' => 'dropdown-menu-widget', 'description' => __( 'Use this widget to add one of your custom menus as a dropdown.', 'gdl_back_office') );

		parent::__construct( 'dropdown_menu', __('Dropdown Menu', 'gdl_back_office'), $widget_ops );

	}



	function widget( $args, $instance ) {

		// Get menu

		$nav_menu = wp_get_nav_menu_object( $instance[ 'nav_menu' ] );



		if ( ! $nav_menu )

			return;



		$instance[ 'title' ] = apply_filters( 'widget_title', $instance['title'], $instance, $this->id_base );



		echo $args[ 'before_widget' ];



		if ( ! empty( $instance[ 'title' ] ) )

			echo $args[ 'before_title' ] . $instance[ 'title' ] . $args[ 'after_title' ];



		dropdown_menu( array( 'fallback_cb' => '', 'menu' => $nav_menu ) );



		echo $args[ 'after_widget' ];

	}



	function update( $new_instance, $old_instance ) {

		$instance[ 'title' ] = strip_tags( stripslashes( $new_instance[ 'title' ] ) );

		$instance[ 'nav_menu' ] = (int) $new_instance[ 'nav_menu' ];

		return $instance;

	}



	function form( $instance ) {

		$title = isset( $instance[ 'title' ] ) ? $instance[ 'title' ] : '';

		$nav_menu = isset( $instance[ 'nav_menu' ] ) ? $instance[ 'nav_menu' ] : '';



		// Get menus

		$menus = get_terms( 'nav_menu', array( 'hide_empty' => false ) );



		// If no menus exists, direct the user to go and create some.

		if ( ! $menus ) {

			echo '<p>'. sprintf( __( 'No menus have been created yet. <a href="%s">Create some</a>.' ), admin_url( 'nav-menus.php' ) ) .'</p>';

			return;

		}

		?>

		<p>

			<label for="<?php echo $this->get_field_id( 'title' ); ?>"><?php _e( 'Title:', 'gdl_back_office' ) ?></label>

			<input type="text" class="widefat" id="<?php echo $this->get_field_id( 'title' ); ?>" name="<?php echo $this->get_field_name( 'title' ); ?>" value="<?php echo $title; ?>" />

		</p>

		<p>

			<label for="<?php echo $this->get_field_id( 'nav_menu' ); ?>"><?php _e( 'Select Menu:', 'gdl_back_office' ); ?></label>

			<select id="<?php echo $this->get_field_id( 'nav_menu' ); ?>" name="<?php echo $this->get_field_name( 'nav_menu' ); ?>">

		<?php

			foreach ( $menus as $menu ) {

				$selected = $nav_menu == $menu->term_id ? ' selected="selected"' : '';

				echo '<option'. $selected .' value="'. $menu->term_id .'">'. $menu->name .'</option>';

			}

		?>

			</select>

		</p>

		<?php

	}



	function init() {

		register_widget( __CLASS__ );

	}

}



// add widget

// add_action( 'widgets_init', array( 'DropDown_Menu_Widget', 'init' ) );



?>