<?php
/*
Plugin Name: Display Widgets
Plugin URI: http://strategy11.com/display-widgets/
Description: Adds checkboxes to each widget to show or hide on site pages.
Author: Strategy11
Author URI: http://strategy11.com
Version: 2.03
*/

/*
// Change the hook this is triggered on with a bit of custom code. Copy and paste into your theme functions.php or a new plugin.
add_filter('dw_callback_trigger', 'dw_callback_trigger');
function dw_callback_trigger(){
    return 'wp_head'; //plugins_loaded, after_setup_theme, wp_loaded, wp_head
}
*/


global $dw_plugin;
$dw_plugin = new DWPlugin();

class DWPlugin{
    var $transient_name = 'dw_details';
    var $checked = array();
    var $id_base = '';
    var $number = '';
    
    // pages on site
    var $pages = array();
    
    // custom post types
    var $cposts = array();
    
    // taxonomies
    var $taxes = array();
    
    // categories
    var $cats = array();
    
    // WPML languages
    var $langs = array();
    
    function __construct(){
        //add_filter('widget_display_callback', array(&$this, 'show_widget'));
        
        // change the hook that triggers widget check
        $hook = apply_filters('dw_callback_trigger', 'wp_loaded');
        
        add_filter($hook, array(&$this, 'trigger_widget_checks'));
        add_action('in_widget_form', array(&$this, 'hidden_widget_options'), 10, 3);
        add_filter('widget_update_callback', array(&$this, 'update_widget_options'), 10, 3);
        add_action('wp_ajax_dw_show_widget', array(&$this, 'show_widget_options'));
        add_action('admin_footer', array(&$this, 'load_js'));
        
        // when a page is saved
        add_action('save_post_page', array(&$this, 'delete_transient'));
        
        // when a new category/taxonomy is created
        add_action('created_term', array(&$this, 'delete_transient'));
        
        // when a custom post type is added
        add_action('update_option_rewrite_rules', array(&$this, 'delete_transient'));
        
        // reset transient after activating the plugin
        register_activation_hook(dirname(__FILE__) .'/display-widgets.php', array(&$this, 'delete_transient'));
        
        add_action('plugins_loaded', array(&$this, 'load_lang'));
    }
    
    function trigger_widget_checks() {
        add_filter('sidebars_widgets', array(&$this, 'sidebars_widgets'));
    }

    function show_widget($instance) {
        $post_id = get_queried_object_id();
        $post_id = self::get_lang_id($post_id, 'page');

        if ( is_home() ) {
            $show = isset($instance['page-home']) ? $instance['page-home'] : false;
            if ( !$show && $post_id ){
                $show = isset($instance['page-'. $post_id]) ? $instance['page-'. $post_id] : false;
            }
            
            // check if blog page is front page too
            if ( !$show && is_front_page() && isset($instance['page-front']) ) {
                $show = $instance['page-front'];
            }
        } else if ( is_front_page() ) {
            $show = isset($instance['page-front']) ? $instance['page-front'] : false;
            if ( !$show && $post_id ) {
                $show = isset($instance['page-'. $post_id]) ? $instance['page-'. $post_id] : false;
            }
        } else if ( is_category() ) {
            $show = isset($instance['cat-'. get_query_var('cat')]) ? $instance['cat-'. get_query_var('cat')] : false;
        } else if ( is_tax() ) {
            $term = get_queried_object();
            $show = isset($instance['tax-'. $term->taxonomy]) ? $instance['tax-'. $term->taxonomy] : false;
            unset($term);
        } else if ( is_post_type_archive() ) {
            $type = get_post_type();
            $show = isset($instance['type-'. $type .'-archive']) ? $instance['type-'. $type .'-archive'] : false;
        } else if ( is_archive() ) {
            $show = isset($instance['page-archive']) ? $instance['page-archive'] : false;
        } else if ( is_single() ) {
            $type = get_post_type();
            if ( $type != 'page' && $type != 'post' ) {
                $show = isset($instance['type-'. $type]) ? $instance['type-'. $type] : false;
            }

            if ( !isset($show) ) {
                $show = isset($instance['page-single']) ? $instance['page-single'] : false;
            }

            if ( !$show ) {
                $cats = get_the_category();
                foreach ( $cats as $cat ) { 
                    if ($show) break;
                    $c_id = self::get_lang_id($cat->cat_ID, 'category');
                    if ( isset($instance['cat-'. $c_id]) ) {
                        $show = $instance['cat-'. $c_id];
                    }
                    unset($c_id);
                    unset($cat);
                } 
            }
            
        } else if ( is_404() ) {
            $show = isset($instance['page-404']) ? $instance['page-404'] : false;
        } else if ( is_search() ) {
            $show = isset($instance['page-search']) ? $instance['page-search'] : false;
        } else if ( $post_id ) {
            $show = isset($instance['page-'. $post_id]) ? $instance['page-'. $post_id] : false;
        } else {
            $show = false;
        }

        if ( $post_id && !$show && isset($instance['other_ids']) && !empty($instance['other_ids']) ) {
            $other_ids = explode(',', $instance['other_ids']);
            foreach ( $other_ids as $other_id ) {
                if ( $post_id == (int) $other_id ) {
                    $show = true;
                }
            }
        }

        if ( !$show && defined('ICL_LANGUAGE_CODE') ) {
            // check for WPML widgets
            $show = isset($instance['lang-'. ICL_LANGUAGE_CODE]) ? $instance['lang-'. ICL_LANGUAGE_CODE] : false;
        }

        if ( !isset($show) ) {
            $show = false;
        }

        $instance['dw_include'] = isset($instance['dw_include']) ? $instance['dw_include'] : 0;
        $instance['dw_logged'] = self::show_logged($instance);
        
        if ( ( $instance['dw_include'] && false == $show ) || ( 0 == $instance['dw_include'] && $show ) ) {
            return false;
        } else {
            $user_ID = is_user_logged_in();
            if ( ( 'out' == $instance['dw_logged'] && $user_ID ) ||
                ( 'in' == $instance['dw_logged'] && !$user_ID ) ) {
                return false;
            }

        }
        
	    return $instance;
    }

    function sidebars_widgets($sidebars) {    
        if ( is_admin() ) {
            return $sidebars;
        }

        global $wp_registered_widgets;

        foreach ( $sidebars as $s => $sidebar ) {
            if ( $s == 'wp_inactive_widgets' || strpos($s, 'orphaned_widgets') === 0 || empty($sidebar) ) {
                continue;
            }

            foreach ( $sidebar as $w => $widget ) {
                // $widget is the id of the widget
                if ( !isset($wp_registered_widgets[$widget]) ) {
                    continue;
                }

                if ( isset($this->checked[$widget]) ) {
                    $show = $this->checked[$widget];
                } else {
                    $opts = $wp_registered_widgets[$widget];
                    $id_base = is_array($opts['callback']) ? $opts['callback'][0]->id_base : $opts['callback'];

                    if ( !$id_base ) {
                        continue;
                    }

                    $instance = get_option('widget_' . $id_base);

                    if ( !$instance || !is_array($instance) ) {
                        continue;
                    }

                    if ( isset($instance['_multiwidget']) && $instance['_multiwidget'] ) {
                        $number = $opts['params'][0]['number'];
                        if ( !isset($instance[$number]) ) {
                            continue;
                        }

                        $instance = $instance[$number];
                        unset($number);
                    }

                    unset($opts);

                    $show = self::show_widget($instance);

                    $this->checked[$widget] = $show ? true : false;
                }

                if ( !$show ) {
                    unset($sidebars[$s][$w]);
                }

                unset($widget);
            }
            unset($sidebar);
        }

        return $sidebars;
    }
    
    function hidden_widget_options($widget, $return, $instance) {
        if ( $_POST && isset($_POST['id_base']) && $_POST['id_base'] == $widget->id_base ) {
            // widget was just saved so it's open
            self::show_hide_widget_options($widget, $return, $instance);
            return;
        }
        
        self::register_globals();
        
        $instance['dw_include'] = isset($instance['dw_include']) ? $instance['dw_include'] : 0;
        $instance['dw_logged'] = self::show_logged($instance);
        $instance['other_ids'] = isset($instance['other_ids']) ? $instance['other_ids'] : '';
?>
<div class="dw_opts">
    <input type="hidden" name="<?php echo $widget->get_field_name('dw_include'); ?>" id="<?php echo $widget->get_field_id('dw_include'); ?>" value="<?php echo $instance['dw_include'] ?>" />  
    <input type="hidden" id="<?php echo $widget->get_field_id('dw_logged'); ?>" name="<?php echo $widget->get_field_name('dw_logged'); ?>" value="<?php echo $instance['dw_logged'] ?>" />
    
    <?php foreach ( $instance as $k => $v ) {
            if ( !$v ) {
                continue;
            }
            
            if ( strpos($k, 'page-') === 0 || strpos($k, 'type-') === 0 || strpos($k, 'cat-') === 0 || 
                strpos($k, 'tax-') === 0 || strpos($k, 'lang-') === 0) { 
    ?>
    <input type="hidden" id="<?php echo $widget->get_field_id($k); ?>" name="<?php echo $widget->get_field_name($k); ?>" value="<?php echo $v ?>"  />
    <?php   } ?>
    <?php } ?>    
    
    <input type="hidden" name="<?php echo $widget->get_field_name('other_ids'); ?>" id="<?php echo $widget->get_field_id('other_ids'); ?>" value="<?php echo esc_attr($instance['other_ids']) ?>" />
</div>
<?php
    }
    
    function show_widget_options() {
        $instance = htmlspecialchars_decode(nl2br(stripslashes($_POST['opts'])));
        $instance = json_decode($instance, true);
        $this->id_base = $_POST['id_base'];
        $this->number = $_POST['widget_number'];
        
        $new_instance = array();
        $prefix = 'widget-'. $this->id_base .'['. $this->number .'][';
        foreach ( $instance as $k => $v ) {
            $n = str_replace( array( $prefix, ']'), '', $v['name']);
            $new_instance[$n] = $v['value'];
        }

        self::show_hide_widget_options($this, '', $new_instance);
        die();
    }

    function show_hide_widget_options($widget, $return, $instance) {
        self::register_globals();
    
        $wp_page_types = self::page_types();
            
        $instance['dw_include'] = isset($instance['dw_include']) ? $instance['dw_include'] : 0;
        $instance['dw_logged'] = self::show_logged($instance);
        $instance['other_ids'] = isset($instance['other_ids']) ? $instance['other_ids'] : '';
?>   
    <p>
        <label for="<?php echo $widget->get_field_id('dw_include'); ?>"><?php _e('Show Widget for:', 'display-widgets') ?></label>
        <select name="<?php echo $widget->get_field_name('dw_logged'); ?>" id="<?php echo $widget->get_field_id('dw_logged'); ?>" class="widefat">
            <option value=""><?php _e('Everyone', 'display-widgets') ?></option>
            <option value="out" <?php echo selected( $instance['dw_logged'], 'out' ) ?>><?php _e('Logged-out users', 'display-widgets') ?></option>
            <option value="in" <?php echo selected( $instance['dw_logged'], 'in' ) ?>><?php _e('Logged-in users', 'display-widgets') ?></option>
        </select>
    </p>

     <p>
    	<select name="<?php echo $widget->get_field_name('dw_include'); ?>" id="<?php echo $widget->get_field_id('dw_include'); ?>" class="widefat">
            <option value="0"><?php _e('Hide on checked pages', 'display-widgets') ?></option> 
            <option value="1" <?php echo selected( $instance['dw_include'], 1 ) ?>><?php _e('Show on checked pages', 'display-widgets') ?></option>
        </select>
    </p>    

<div style="height:150px; overflow:auto; border:1px solid #dfdfdf; padding:5px; margin-bottom:5px;">
    <h4 class="dw_toggle" style="cursor:pointer;margin-top:0;"><?php _e('Miscellaneous', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ($wp_page_types as $key => $label){ 
        $instance['page-'. $key] = isset($instance['page-'. $key]) ? $instance['page-'. $key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['page-'. $key], true) ?> id="<?php echo $widget->get_field_id('page-'. $key); ?>" name="<?php echo $widget->get_field_name('page-'. $key); ?>" />
        <label for="<?php echo $widget->get_field_id('page-'. $key); ?>"><?php echo $label .' '. __('Page', 'display-widgets') ?></label></p>
    <?php } ?>
    </div>
    
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Pages') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->pages as $page ) { 
        $instance['page-'. $page->ID] = isset($instance['page-'. $page->ID]) ? $instance['page-'. $page->ID] : false;
        $p_title = apply_filters('the_title', $page->post_title, $page->ID);
        if ( $page->post_parent ) {
            $parent = get_post($page->post_parent);
            $p_title .= ' ('. apply_filters('the_title', $parent->post_title, $parent->ID);
            if ( $parent->post_parent ) {
                $grandparent = get_post($parent->post_parent);
                $p_title .= ' - '. apply_filters('the_title', $grandparent->post_title, $grandparent->ID);
                unset($grandparent);
            }
            $p_title .= ')';
            unset($parent);
        }

    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['page-'. $page->ID], true) ?> id="<?php echo $widget->get_field_id('page-'. $page->ID); ?>" name="<?php echo $widget->get_field_name('page-'. $page->ID); ?>" />
        <label for="<?php echo $widget->get_field_id('page-'. $page->ID); ?>"><?php echo $p_title ?></label></p>
    <?php   unset($p_title);	
        }  ?>
    </div>
    
    <?php if ( !empty($this->cposts) ) { ?>
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Custom Post Types', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->cposts as $post_key => $custom_post ) { 
        $instance['type-'. $post_key] = isset($instance['type-'. $post_key]) ? $instance['type-'. $post_key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['type-'. $post_key], true) ?> id="<?php echo $widget->get_field_id('type-'. $post_key); ?>" name="<?php echo $widget->get_field_name('type-'. $post_key); ?>" />
        <label for="<?php echo $widget->get_field_id('type-'. $post_key); ?>"><?php echo stripslashes($custom_post->labels->name) ?></label></p>
    <?php
            unset($post_key);
            unset($custom_post);
        } ?>
    </div>
    
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Custom Post Type Archives', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->cposts as $post_key => $custom_post ) {
        if ( !$custom_post->has_archive ) {
            // don't give the option if there is no archive page
            continue;
        }
        $instance['type-'. $post_key .'-archive'] = isset($instance['type-'. $post_key .'-archive']) ? $instance['type-'. $post_key .'-archive'] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['type-'. $post_key.'-archive'], true) ?> id="<?php echo $widget->get_field_id('type-'. $post_key .'-archive'); ?>" name="<?php echo $widget->get_field_name('type-'. $post_key .'-archive'); ?>" />
        <label for="<?php echo $widget->get_field_id('type-'. $post_key .'-archive'); ?>"><?php echo stripslashes($custom_post->labels->name) ?> <?php _e('Archive', 'display-widgets') ?></label></p>
    <?php } ?>
    </div>
    <?php } ?>
    
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Categories') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->cats as $cat ) {
        $instance['cat-'. $cat->cat_ID] = isset($instance['cat-'. $cat->cat_ID]) ? $instance['cat-'. $cat->cat_ID] : false;   
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['cat-'. $cat->cat_ID], true) ?> id="<?php echo $widget->get_field_id('cat-'. $cat->cat_ID); ?>" name="<?php echo $widget->get_field_name('cat-'. $cat->cat_ID); ?>" />
        <label for="<?php echo $widget->get_field_id('cat-'. $cat->cat_ID); ?>"><?php echo $cat->cat_name ?></label></p>
    <?php
        unset($cat);
        } 
    ?>
    </div>
    
    <?php if ( !empty($this->taxes) ) { ?>
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Taxonomies', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->taxes as $tax ) { 
        $instance['tax-'. $tax] = isset($instance['tax-'. $tax]) ? $instance['tax-'. $tax] : false;   
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['tax-'. $tax], true) ?> id="<?php echo $widget->get_field_id('tax-'. $tax); ?>" name="<?php echo $widget->get_field_name('tax-'. $tax); ?>" />
        <label for="<?php echo $widget->get_field_id('tax-'. $tax); ?>"><?php echo str_replace(array('_','-'), ' ', ucfirst($tax)) ?></label></p>
    <?php
        unset($tax);
        } 
    ?>
    </div>
    <?php } ?>
    
    <?php if ( !empty($this->langs) ) { ?>
    <h4 class="dw_toggle" style="cursor:pointer;"><?php _e('Languages', 'display-widgets') ?> +/-</h4>
    <div class="dw_collapse">
    <?php foreach ( $this->langs as $lang ) {
		$key = $lang['language_code'];
     	$instance['lang-'. $key] = isset($instance['lang-'. $key]) ? $instance['lang-'. $key] : false;
    ?>
        <p><input class="checkbox" type="checkbox" <?php checked($instance['lang-'. $key], true) ?> id="<?php echo $widget->get_field_id('lang-'. $key); ?>" name="<?php echo $widget->get_field_name('lang-'. $key); ?>" />
        <label for="<?php echo $widget->get_field_id('lang-'. $key); ?>"><?php echo $lang['native_name'] ?></label></p>
       
    <?php 
        unset($lang);
        unset($key);
        } 
    ?>
    </div>
    <?php } ?>
    
    <p><label for="<?php echo $widget->get_field_id('other_ids'); ?>"><?php _e('Comma Separated list of IDs of posts not listed above', 'display-widgets') ?>:</label>
    <input type="text" value="<?php echo $instance['other_ids'] ?>" name="<?php echo $widget->get_field_name('other_ids'); ?>" id="<?php echo $widget->get_field_id('other_ids'); ?>" />
    </p>
    </div>
<?php
    }

    function update_widget_options($instance, $new_instance, $old_instance) {
        self::register_globals();
    
        if ( !empty($this->pages) ) {
            foreach ($this->pages as $page) {
                if ( isset($new_instance['page-'. $page->ID]) ) {
                    $instance['page-'. $page->ID] = 1;
                } else if ( isset($instance['page-'. $page->ID]) ) {
                    unset($instance['page-'. $page->ID]);
                }
                unset($page);
            }
        }

        foreach ( $this->cats as $cat ) {
            if ( isset($new_instance['cat-'. $cat->cat_ID]) ) {
                $instance['cat-'. $cat->cat_ID] = 1;
            } else if ( isset($instance['cat-'. $cat->cat_ID]) ){
                unset($instance['cat-'. $cat->cat_ID]);
            }
            unset($cat);
        }

        if ( !empty($this->cposts) ) {
            foreach ( $this->cposts as $post_key => $custom_post ) {
                if ( isset($new_instance['type-'. $post_key]) ) {
                    $instance['type-'. $post_key] = 1;
                } else if (isset($instance['type-'. $post_key]) ) {
                    unset($instance['type-'. $post_key]);
                }

                if ( isset($new_instance['type-'. $post_key .'-archive']) ) {
                    $instance['type-'. $post_key .'-archive'] = 1;
                } else if ( isset($instance['type-'. $post_key .'-archive']) ) {
                    unset($instance['type-'. $post_key .'-archive']);
                }
                
                unset($custom_post);
            }
        }

        if ( !empty($this->taxes) ) {
            foreach ( $this->taxes as $tax ) {
                if ( isset($new_instance['tax-'. $tax]) ) {
                    $instance['tax-'. $tax] = 1;
                } else if ( isset($instance['tax-'. $tax]) ) {
                    unset($instance['tax-'. $tax]);
                }
                unset($tax);
            }
        }

        if ( !empty($this->langs) ) {
            foreach ( $this->langs as $lang ) {
                if ( isset($new_instance['lang-'. $lang['language_code'] ]) ) {
                    $instance['lang-'. $lang['language_code']] = 1;
                } else if(isset($instance['lang-'. $lang['language_code']]) ) {
                    unset($instance['lang-'. $lang['language_code']]);
                }
                unset($lang);
            }    
        }

        $instance['dw_include'] = ( isset($new_instance['dw_include']) && $new_instance['dw_include'] ) ? 1 : 0;
        $instance['dw_logged'] = ( isset($new_instance['dw_logged']) && $new_instance['dw_logged'] ) ? $new_instance['dw_logged'] : '';
        $instance['other_ids'] = ( isset($new_instance['other_ids']) && $new_instance['other_ids'] ) ? $new_instance['other_ids'] : '';
        
        $page_types = self::page_types();
        foreach ( array_keys($page_types) as $page ) {
            if ( isset($new_instance['page-'. $page]) ) {
                $instance['page-'. $page] = 1;
            } else if ( isset($instance['page-'. $page]) ) {
                unset($instance['page-'. $page]);
            }
        }
        unset($page_types);

        return $instance;
    }
    
    function get_field_name($field_name) {
		return 'widget-' . $this->id_base . '[' . $this->number . '][' . $field_name . ']';
	}
    
	function get_field_id($field_name) {
		return 'widget-' . $this->id_base . '-' . $this->number . '-' . $field_name;
	}
    
    function load_js() {
        global $pagenow;
        
        if ( $pagenow != 'widgets.php' ) {
            //only load the js on the widgets page
            return;
        }
?>
<script type="text/javascript">
/*<![CDATA[*/
jQuery(document).ready(function($){
$('.widgets-holder-wrap').on('click', '.dw_toggle', dw_toggle);
});
jQuery(document.body).bind('click.widgets-toggle', dw_show_opts);
function dw_show_opts(e){
    var target = jQuery(e.target);
    var widget = target.closest('div.widget');
	var inside = widget.children('.widget-inside');
	var opts = inside.find('.dw_opts');
	if(opts.length == 0){
	    return;
	}
	
	inside.find('.spinner').show();
    
    jQuery.ajax({
		type:'POST',url:'<?php echo admin_url( "admin-ajax.php" ) ?>',
		data:{
		    'action':'dw_show_widget',
		    'opts':JSON.stringify(opts.children('input').serializeArray()),
		    'id_base':inside.find('input.id_base').val(),
		    'widget_number':(inside.find('input.multi_number').val() == '') ? inside.find('input.widget_number').val() : inside.find('input.multi_number').val()
		},
		success:function(html){ opts.replaceWith(html); inside.find('.spinner').hide(); }
	});
}
function dw_toggle(){jQuery(this).next('.dw_collapse').toggle();}
/*]]>*/
</script>
<?php
    }
    
    function show_logged($instance) {
        if ( isset($instance['dw_logged']) ) {
            return $instance['dw_logged'];
        }
        
        if ( isset($instance['dw_logout']) && $instance['dw_logout'] ) {
            $instance['dw_logged'] = 'out';
        } else if ( isset($instance['dw_login']) && $instance['dw_login'] ) {
            $instance['dw_logged'] = 'in';
        } else {
            $instance['dw_logged'] = '';
        }
        
        return $instance['dw_logged'];
    }
    
    function page_types(){
        $page_types = array(
            'front'     => __('Front', 'display-widgets'), 
            'home'      => __('Blog', 'display-widgets'),
            'archive'   => __('Archives'),
            'single'    => __('Single Post'),
            '404'       => '404',
            'search'    => __('Search'),
        );
        
        return $page_types;
    }

    function register_globals(){
        if ( !empty($this->checked) ) {
            return;
        }
        
        $saved_details = get_transient( $this->transient_name );
        if ( $saved_details ) {
            foreach ( $saved_details as $k => $d ) {
                if ( empty($this->{$k}) ) {
                    $this->{$k} = $d;
                }
                
                unset($k);
                unset($d);
            }
        }
        
        if ( empty($this->pages) ) {
            $this->pages = get_posts( array(
                'post_type' => 'page', 'post_status' => 'publish', 
                'numberposts' => -1, 'orderby' => 'title', 'order' => 'ASC',
                'fields' => array('ID', 'name'),
            ));
        }
        
        if ( empty($this->cats) ) {
            $this->cats = get_categories( array(
                'hide_empty'    => false,
                //'fields'        => 'id=>name', //added in 3.8
            ) );    
        }
        
        if ( empty($this->cposts) ) {
            $this->cposts = get_post_types( array(
                'public' => true,
            ), 'object');
            
            foreach ( array( 'revision', 'post', 'page', 'attachment', 'nav_menu_item' ) as $unset ) {
                unset($this->cposts[$unset]);
            }
            
            foreach ( $this->cposts as $c => $type ) {
                $post_taxes = get_object_taxonomies($c);
                foreach ( $post_taxes as $post_tax) {
                    $this->taxes[] = $post_tax;
                }
            }
        }
        
        if ( empty($this->langs) && function_exists('icl_get_languages') ) {
            $this->langs = icl_get_languages('skip_missing=0&orderby=code');
        }
        
        // save for one week
        set_transient( $this->transient_name, array(
            'pages'     => $this->pages,
            'cats'      => $this->cats,
            'cposts'    => $this->cposts,
            'taxes'     => $this->taxes,
        ), 60*60*24*7 );

        if ( empty($this->checked) ) {
            $this->checked[] = true;
        }
    }
    
    function delete_transient() {
        delete_transient( $this->transient_name );
    }

    function load_lang(){
        load_plugin_textdomain( 'display-widgets', false, dirname( plugin_basename( __FILE__ ) ) . '/languages/' );
    }

    /* WPML support */
    function get_lang_id($id, $type = 'page') {
        if ( function_exists('icl_object_id') ) {
            $id = icl_object_id($id, $type, true);
        }
    
        return $id;
    }

}