pc-switcher-widget.php

<?php
/*
Widget Name: PC Switcher Widget (Sparkart Fork)
Plugin URI: https://github.com/SparkartGroupInc/multi-device-switcher
Description: PC Switcher Widget add-on for the Multi Device Switcher. Use this widget to add the PC Switcher to a widget.
Version: 1.3.0
Author: Sparkart
Author URI: http://www.sparkart.com/
License: GPL2
*/

/*
    Copyright 2013 thingsym (http://www.thingslabo.com/)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA
*/

/**
 * PC Switcher Widget
 *
 * @since 1.2
 */
if ( class_exists('Multi_Device_Switcher') )
	add_action('widgets_init', 'PC_Switcher_load_widgets');

function PC_Switcher_load_widgets() {
	register_widget('PC_Switcher');
}

class PC_Switcher extends WP_Widget {

	function __construct() {
		load_plugin_textdomain('multi-device-switcher', false, 'multi-device-switcher/languages');
		$widget_ops = array('classname' => 'widget_pc_switcher', 'description' => __( "Add the PC Switcher to a widget.", 'multi-device-switcher') );
		parent::__construct('pc-switcher', __('PC Switcher', 'multi-device-switcher'), $widget_ops);
		$this->alt_option_name = 'widget_pc_switcher';

		add_action( 'save_post', array(&$this, 'flush_widget_cache') );
		add_action( 'deleted_post', array(&$this, 'flush_widget_cache') );
		add_action( 'switch_theme', array(&$this, 'flush_widget_cache') );
	}

	function widget($args, $instance) {
		if ( !function_exists( 'multi_device_switcher_add_pc_switcher' ) )
			return;

		global $multi_device_switcher;
		$name = $multi_device_switcher->get_device_theme();

		if ( $name && $name != 'None' ) {

			$cache = wp_cache_get('widget_pc_switcher', 'widget');

			if ( !is_array($cache) )
				$cache = array();

			if ( isset($cache[ $args['widget_id'] ]) ) {
				echo $cache[ $args['widget_id'] ];
				return;
			}

			ob_start();
			extract($args);

			echo $before_widget;
			multi_device_switcher_add_pc_switcher();
			echo $after_widget;

			$cache[ $args['widget_id'] ] = ob_get_flush();
			wp_cache_set('widget_pc_switcher', $cache, 'widget');
		}
	}

	function update( $new_instance, $old_instance ) {
		$instance = $old_instance;

		$this->flush_widget_cache();

		$alloptions = wp_cache_get( 'alloptions', 'options' );
		if ( isset($alloptions['widget_pc_switcher']) )
			delete_option('widget_pc_switcher');

		return $instance;
	}

	function flush_widget_cache() {
		wp_cache_delete('widget_pc_switcher', 'widget');
	}

	function form( $instance ) {
	}
}
?>