/**
     * Output widget.
     *
     * @see WP_Widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget($args, $instance)
    {
        global $wp, $wp_the_query;
        if (!is_post_type_archive('product') && !is_tax(get_object_taxonomies('product'))) {
            return;
        }
        if (!$wp_the_query->post_count) {
            return;
        }
        $min_price = isset($_GET['min_price']) ? esc_attr($_GET['min_price']) : '';
        $max_price = isset($_GET['max_price']) ? esc_attr($_GET['max_price']) : '';
        wp_enqueue_script('wc-price-slider');
        // Find min and max price in current result set
        $prices = $this->get_filtered_price();
        $min = floor($prices->min_price);
        $max = ceil($prices->max_price);
        if ($min === $max) {
            return;
        }
        $this->widget_start($args, $instance);
        if ('' === get_option('permalink_structure')) {
            $form_action = remove_query_arg(array('page', 'paged'), add_query_arg($wp->query_string, '', home_url($wp->request)));
        } else {
            $form_action = preg_replace('%\\/page/[0-9]+%', '', home_url(trailingslashit($wp->request)));
        }
        /**
         * Adjust max if the store taxes are not displayed how they are stored.
         * Min is left alone because the product may not be taxable.
         * Kicks in when prices excluding tax are displayed including tax.
         */
        if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
            $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
            $class_max = $max;
            foreach ($tax_classes as $tax_class) {
                if ($tax_rates = WC_Tax::get_rates($tax_class)) {
                    $class_max = $max + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($max, $tax_rates));
                }
            }
            $max = $class_max;
        }
        echo '<form method="get" action="' . esc_url($form_action) . '">
			<div class="price_slider_wrapper">
				<div class="price_slider" style="display:none;"></div>
				<div class="price_slider_amount">
					<input type="text" id="min_price" name="min_price" value="' . esc_attr($min_price) . '" data-min="' . esc_attr(apply_filters('woocommerce_price_filter_widget_min_amount', $min)) . '" placeholder="' . esc_attr__('Min price', 'woocommerce') . '" />
					<input type="text" id="max_price" name="max_price" value="' . esc_attr($max_price) . '" data-max="' . esc_attr(apply_filters('woocommerce_price_filter_widget_max_amount', $max)) . '" placeholder="' . esc_attr__('Max price', 'woocommerce') . '" />
					<button type="submit" class="button">' . __('Filter', 'woocommerce') . '</button>
					<div class="price_label" style="display:none;">
						' . __('Price:', 'woocommerce') . ' <span class="from"></span> &mdash; <span class="to"></span>
					</div>
					' . wc_query_string_form_fields(null, array('min_price', 'max_price'), '', true) . '
					<div class="clear"></div>
				</div>
			</div>
		</form>';
        $this->widget_end($args);
    }

 /**
  * Constructor for the cart class. Loads options and hooks in the init method.
  */
 public function __construct()
 {
     $this->prices_include_tax = wc_prices_include_tax();
     $this->round_at_subtotal = get_option('woocommerce_tax_round_at_subtotal') == 'yes';
     $this->tax_display_cart = get_option('woocommerce_tax_display_cart');
     $this->dp = wc_get_price_decimals();
     $this->display_totals_ex_tax = $this->tax_display_cart == 'excl';
     $this->display_cart_ex_tax = $this->tax_display_cart == 'excl';
     add_action('wp_loaded', array($this, 'init'));
     // Get cart after WP and plugins are loaded.
     add_action('wp', array($this, 'maybe_set_cart_cookies'), 99);
     // Set cookies
     add_action('shutdown', array($this, 'maybe_set_cart_cookies'), 0);
     // Set cookies before shutdown and ob flushing
     add_action('woocommerce_add_to_cart', array($this, 'calculate_totals'), 20, 0);
     add_action('woocommerce_applied_coupon', array($this, 'calculate_totals'), 20, 0);
 }

 /**
  * Get discount amount for a cart item
  *
  * @param  float $discounting_amount Amount the coupon is being applied to
  * @param  array|null $cart_item Cart item being discounted if applicable
  * @param  boolean $single True if discounting a single qty item, false if its the line
  * @return float Amount this coupon has discounted
  */
 public function get_discount_amount($discounting_amount, $cart_item = null, $single = false)
 {
     $discount = 0;
     if ($this->is_type('fixed_product')) {
         $discount = $discounting_amount < $this->coupon_amount ? $discounting_amount : $this->coupon_amount;
         // If dealing with a line and not a single item, we need to multiple fixed discount by cart item qty.
         if (!$single && !is_null($cart_item)) {
             // Discount for the line.
             $discount = $discount * $cart_item['quantity'];
         }
     } elseif ($this->is_type(array('percent_product', 'percent'))) {
         $discount = round($discounting_amount / 100 * $this->coupon_amount, WC()->cart->dp);
     } elseif ($this->is_type('fixed_cart')) {
         if (!is_null($cart_item)) {
             /**
              * This is the most complex discount - we need to divide the discount between rows based on their price in
              * proportion to the subtotal. This is so rows with different tax rates get a fair discount, and so rows
              * with no price (free) don't get discounted.
              *
              * Get item discount by dividing item cost by subtotal to get a %
              */
             $discount_percent = 0;
             if (WC()->cart->subtotal_ex_tax) {
                 // Uses price inc tax if prices include tax to work around https://github.com/woothemes/woocommerce/issues/7669
                 $discount_percent = $cart_item['data']->get_price() * $cart_item['quantity'] / (wc_prices_include_tax() ? WC()->cart->subtotal : WC()->cart->subtotal_ex_tax);
             }
             $discount = min($this->coupon_amount * $discount_percent / $cart_item['quantity'], $discounting_amount);
         } else {
             $discount = min($this->coupon_amount, $discounting_amount);
         }
     }
     // Handle the limit_usage_to_x_items option
     if ($this->is_type(array('percent_product', 'fixed_product')) && !is_null($cart_item)) {
         if ('' === $this->limit_usage_to_x_items) {
             $qty = $cart_item['quantity'];
         } else {
             $qty = min($this->limit_usage_to_x_items, $cart_item['quantity']);
             $this->limit_usage_to_x_items = max(0, $this->limit_usage_to_x_items - $qty);
         }
         if ($single) {
             $discount = $discount * $qty / $cart_item['quantity'];
         } else {
             $discount = $discount / $cart_item['quantity'] * $qty;
         }
     }
     return apply_filters('woocommerce_coupon_get_discount_amount', $discount, $discounting_amount, $cart_item, $single, $this);
 }

 /**
  * Price Filter post filter.
  *
  * @param array $filtered_posts
  * @return array
  */
 public function price_filter($filtered_posts = array())
 {
     global $wpdb;
     if (isset($_GET['max_price']) || isset($_GET['min_price'])) {
         $matched_products = array();
         $min = isset($_GET['min_price']) ? floatval($_GET['min_price']) : 0;
         $max = isset($_GET['max_price']) ? floatval($_GET['max_price']) : 9999999999;
         // If displaying prices in the shop including taxes, but prices don't include taxes..
         if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
             $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
             foreach ($tax_classes as $tax_class) {
                 $tax_rates = WC_Tax::get_rates($tax_class);
                 $min_class = $min - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($min, $tax_rates));
                 $max_class = $max - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($max, $tax_rates));
                 $matched_products_query = apply_filters('woocommerce_price_filter_results', $wpdb->get_results($wpdb->prepare("\n\t\t\t\t\t\tSELECT DISTINCT ID, post_parent, post_type FROM {$wpdb->posts}\n\t\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm1 ON ID = pm1.post_id\n\t\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm2 ON ID = pm2.post_id\n\t\t\t\t\t\tWHERE post_type IN ( 'product', 'product_variation' )\n\t\t\t\t\t\tAND post_status = 'publish'\n\t\t\t\t\t\tAND pm1.meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t\t\t\tAND pm1.meta_value BETWEEN %f AND %f\n\t\t\t\t\t\tAND pm2.meta_key = '_tax_class'\n\t\t\t\t\t\tAND pm2.meta_value = %s\n\t\t\t\t\t", $min_class, $max_class, sanitize_title($tax_class)), OBJECT_K), $min_class, $max_class);
                 if ($matched_products_query) {
                     foreach ($matched_products_query as $product) {
                         if ($product->post_type == 'product') {
                             $matched_products[] = $product->ID;
                         }
                         if ($product->post_parent > 0) {
                             $matched_products[] = $product->post_parent;
                         }
                     }
                 }
             }
         } else {
             $matched_products_query = apply_filters('woocommerce_price_filter_results', $wpdb->get_results($wpdb->prepare("\n\t\t\t\t\tSELECT DISTINCT ID, post_parent, post_type FROM {$wpdb->posts}\n\t\t\t\t\tINNER JOIN {$wpdb->postmeta} pm1 ON ID = pm1.post_id\n\t\t\t\t\tWHERE post_type IN ( 'product', 'product_variation' )\n\t\t\t\t\tAND post_status = 'publish'\n\t\t\t\t\tAND pm1.meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t\t\tAND pm1.meta_value BETWEEN %d AND %d\n\t\t\t\t", $min, $max), OBJECT_K), $min, $max);
             if ($matched_products_query) {
                 foreach ($matched_products_query as $product) {
                     if ($product->post_type == 'product') {
                         $matched_products[] = $product->ID;
                     }
                     if ($product->post_parent > 0) {
                         $matched_products[] = $product->post_parent;
                     }
                 }
             }
         }
         $matched_products = array_unique($matched_products);
         // Filter the id's
         if (0 === sizeof($filtered_posts)) {
             $filtered_posts = $matched_products;
         } else {
             $filtered_posts = array_intersect($filtered_posts, $matched_products);
         }
         $filtered_posts[] = 0;
     }
     return (array) $filtered_posts;
 }

 /**
  * Get line item args for paypal request.
  * @param  WC_Order $order
  * @return array
  */
 protected function get_line_item_args($order)
 {
     /**
      * Try passing a line item per product if supported.
      */
     if ((!wc_tax_enabled() || !wc_prices_include_tax()) && $this->prepare_line_items($order)) {
         $line_item_args = array();
         $line_item_args['tax_cart'] = $this->number_format($order->get_total_tax(), $order);
         if ($order->get_total_discount() > 0) {
             $line_item_args['discount_amount_cart'] = $this->number_format($this->round($order->get_total_discount(), $order), $order);
         }
         // Add shipping costs. Paypal ignores anything over 5 digits (999.99 is the max).
         // We also check that shipping is not the **only** cost as PayPal won't allow payment
         // if the items have no cost.
         if ($order->get_shipping_total() > 0 && $order->get_shipping_total() < 999.99 && $this->number_format($order->get_shipping_total() + $order->get_shipping_tax(), $order) !== $this->number_format($order->get_total(), $order)) {
             $line_item_args['shipping_1'] = $this->number_format($order->get_shipping_total(), $order);
         } elseif ($order->get_shipping_total() > 0) {
             $this->add_line_item(sprintf(__('Shipping via %s', 'woocommerce'), $order->get_shipping_method()), 1, $this->number_format($order->get_shipping_total(), $order));
         }
         $line_item_args = array_merge($line_item_args, $this->get_line_items());
         /**
          * Send order as a single item.
          *
          * For shipping, we longer use shipping_1 because paypal ignores it if *any* shipping rules are within paypal, and paypal ignores anything over 5 digits (999.99 is the max).
          */
     } else {
         $this->delete_line_items();
         $line_item_args = array();
         $all_items_name = $this->get_order_item_names($order);
         $this->add_line_item($all_items_name ? $all_items_name : __('Order', 'woocommerce'), 1, $this->number_format($order->get_total() - $this->round($order->get_shipping_total() + $order->get_shipping_tax(), $order), $order), $order->get_order_number());
         // Add shipping costs. Paypal ignores anything over 5 digits (999.99 is the max).
         // We also check that shipping is not the **only** cost as PayPal won't allow payment
         // if the items have no cost.
         if ($order->get_shipping_total() > 0 && $order->get_shipping_total() < 999.99 && $this->number_format($order->get_shipping_total() + $order->get_shipping_tax(), $order) !== $this->number_format($order->get_total(), $order)) {
             $line_item_args['shipping_1'] = $this->number_format($order->get_shipping_total() + $order->get_shipping_tax(), $order);
         } elseif ($order->get_shipping_total() > 0) {
             $this->add_line_item(sprintf(__('Shipping via %s', 'woocommerce'), $order->get_shipping_method()), 1, $this->number_format($order->get_shipping_total() + $order->get_shipping_tax(), $order));
         }
         $line_item_args = array_merge($line_item_args, $this->get_line_items());
     }
     return $line_item_args;
 }

    /**
     * Output widget.
     *
     * @see WP_Widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget($args, $instance)
    {
        global $wp, $wp_the_query;
        if (!is_post_type_archive('product') && !is_tax(get_object_taxonomies('product'))) {
            return;
        }
        if (!$wp_the_query->post_count) {
            return;
        }
        $min_price = isset($_GET['min_price']) ? esc_attr($_GET['min_price']) : '';
        $max_price = isset($_GET['max_price']) ? esc_attr($_GET['max_price']) : '';
        wp_enqueue_script('wc-price-slider');
        // Remember current filters/search
        $fields = '';
        if (get_search_query()) {
            $fields .= '<input type="hidden" name="s" value="' . get_search_query() . '" />';
        }
        if (!empty($_GET['post_type'])) {
            $fields .= '<input type="hidden" name="post_type" value="' . esc_attr($_GET['post_type']) . '" />';
        }
        if (!empty($_GET['product_cat'])) {
            $fields .= '<input type="hidden" name="product_cat" value="' . esc_attr($_GET['product_cat']) . '" />';
        }
        if (!empty($_GET['product_tag'])) {
            $fields .= '<input type="hidden" name="product_tag" value="' . esc_attr($_GET['product_tag']) . '" />';
        }
        if (!empty($_GET['orderby'])) {
            $fields .= '<input type="hidden" name="orderby" value="' . esc_attr($_GET['orderby']) . '" />';
        }
        if (!empty($_GET['min_rating'])) {
            $fields .= '<input type="hidden" name="min_rating" value="' . esc_attr($_GET['min_rating']) . '" />';
        }
        if ($_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes()) {
            foreach ($_chosen_attributes as $attribute => $data) {
                $taxonomy_filter = 'filter_' . str_replace('pa_', '', $attribute);
                $fields .= '<input type="hidden" name="' . esc_attr($taxonomy_filter) . '" value="' . esc_attr(implode(',', $data['terms'])) . '" />';
                if ('or' == $data['query_type']) {
                    $fields .= '<input type="hidden" name="' . esc_attr(str_replace('pa_', 'query_type_', $attribute)) . '" value="or" />';
                }
            }
        }
        // Find min and max price in current result set
        $prices = $this->get_filtered_price();
        $min = floor($prices->min_price);
        $max = ceil($prices->max_price);
        if ($min === $max) {
            return;
        }
        $this->widget_start($args, $instance);
        if ('' == get_option('permalink_structure')) {
            $form_action = remove_query_arg(array('page', 'paged'), add_query_arg($wp->query_string, '', home_url($wp->request)));
        } else {
            $form_action = preg_replace('%\\/page/[0-9]+%', '', home_url(trailingslashit($wp->request)));
        }
        // Adjust min and max if the store taxes are not displayed how they are stored
        if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
            $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
            foreach ($tax_classes as $tax_class) {
                $tax_rates = WC_Tax::get_rates($tax_class);
                $class_min = $min + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($min, $tax_rates));
                $class_max = $max + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($max, $tax_rates));
                if ($class_min < $min) {
                    $min = $class_min;
                }
                if ($class_max > $max) {
                    $max = $class_max;
                }
            }
        }
        echo '<form method="get" action="' . esc_url($form_action) . '">
			<div class="price_slider_wrapper">
				<div class="price_slider" style="display:none;"></div>
				<div class="price_slider_amount">
					<input type="text" id="min_price" name="min_price" value="' . esc_attr($min_price) . '" data-min="' . esc_attr(apply_filters('woocommerce_price_filter_widget_min_amount', $min)) . '" placeholder="' . esc_attr__('Min price', 'woocommerce') . '" />
					<input type="text" id="max_price" name="max_price" value="' . esc_attr($max_price) . '" data-max="' . esc_attr(apply_filters('woocommerce_price_filter_widget_max_amount', $max)) . '" placeholder="' . esc_attr__('Max price', 'woocommerce') . '" />
					<button type="submit" class="button">' . __('Filter', 'woocommerce') . '</button>
					<div class="price_label" style="display:none;">
						' . __('Price:', 'woocommerce') . ' <span class="from"></span> &mdash; <span class="to"></span>
					</div>
					' . $fields . '
					<div class="clear"></div>
				</div>
			</div>
		</form>';
        $this->widget_end($args);
    }

 /**
  * Auto-load in-accessible properties on demand.
  *
  * @param mixed $key
  * @return mixed
  */
 public function __get($key)
 {
     switch ($key) {
         case 'prices_include_tax':
             return wc_prices_include_tax();
             break;
         case 'round_at_subtotal':
             return 'yes' === get_option('woocommerce_tax_round_at_subtotal');
             break;
         case 'tax_display_cart':
             return get_option('woocommerce_tax_display_cart');
             break;
         case 'dp':
             return wc_get_price_decimals();
             break;
         case 'display_totals_ex_tax':
         case 'display_cart_ex_tax':
             return $this->tax_display_cart === 'excl';
             break;
         case 'cart_contents_weight':
             return $this->get_cart_contents_weight();
             break;
         case 'cart_contents_count':
             return $this->get_cart_contents_count();
             break;
         case 'tax':
             _deprecated_argument('WC_Cart->tax', '2.3', 'Use WC_Tax:: directly');
             $this->tax = new WC_Tax();
             return $this->tax;
         case 'discount_total':
             _deprecated_argument('WC_Cart->discount_total', '2.3', 'After tax coupons are no longer supported. For more information see: https://woocommerce.wordpress.com/2014/12/upcoming-coupon-changes-in-woocommerce-2-3/');
             return 0;
     }
 }

 /**
  * Get discount amount for a cart item.
  *
  * @param  float $discounting_amount Amount the coupon is being applied to
  * @param  array|null $cart_item Cart item being discounted if applicable
  * @param  boolean $single True if discounting a single qty item, false if its the line
  * @return float Amount this coupon has discounted
  */
 public function get_discount_amount($discounting_amount, $cart_item = null, $single = false)
 {
     $discount = 0;
     $cart_item_qty = is_null($cart_item) ? 1 : $cart_item['quantity'];
     if ($this->is_type(array('percent_product', 'percent'))) {
         $discount = $this->coupon_amount * ($discounting_amount / 100);
     } elseif ($this->is_type('fixed_cart') && !is_null($cart_item) && WC()->cart->subtotal_ex_tax) {
         /**
          * This is the most complex discount - we need to divide the discount between rows based on their price in.
          * proportion to the subtotal. This is so rows with different tax rates get a fair discount, and so rows.
          * with no price (free) don't get discounted.
          *
          * Get item discount by dividing item cost by subtotal to get a %.
          *
          * Uses price inc tax if prices include tax to work around https://github.com/woothemes/woocommerce/issues/7669 and https://github.com/woothemes/woocommerce/issues/8074.
          */
         if (wc_prices_include_tax()) {
             $discount_percent = $cart_item['data']->get_price_including_tax() * $cart_item_qty / WC()->cart->subtotal;
         } else {
             $discount_percent = $cart_item['data']->get_price_excluding_tax() * $cart_item_qty / WC()->cart->subtotal_ex_tax;
         }
         $discount = $this->coupon_amount * $discount_percent / $cart_item_qty;
     } elseif ($this->is_type('fixed_product')) {
         $discount = min($this->coupon_amount, $discounting_amount);
         $discount = $single ? $discount : $discount * $cart_item_qty;
     }
     $discount = min($discount, $discounting_amount);
     // Handle the limit_usage_to_x_items option
     if ($this->is_type(array('percent_product', 'fixed_product'))) {
         if ($discounting_amount) {
             if ('' === $this->limit_usage_to_x_items) {
                 $limit_usage_qty = $cart_item_qty;
             } else {
                 $limit_usage_qty = min($this->limit_usage_to_x_items, $cart_item_qty);
                 $this->limit_usage_to_x_items = max(0, $this->limit_usage_to_x_items - $limit_usage_qty);
             }
             if ($single) {
                 $discount = $discount * $limit_usage_qty / $cart_item_qty;
             } else {
                 $discount = $discount / $cart_item_qty * $limit_usage_qty;
             }
         }
     }
     $discount = round($discount, WC_ROUNDING_PRECISION);
     return apply_filters('woocommerce_coupon_get_discount_amount', $discount, $discounting_amount, $cart_item, $single, $this);
 }

 /**
  * Get the site index.
  *
  * This endpoint describes the capabilities of the site.
  *
  * @since 2.3
  * @return array Index entity
  */
 public function get_index()
 {
     // General site data
     $available = array('store' => array('name' => get_option('blogname'), 'description' => get_option('blogdescription'), 'URL' => get_option('siteurl'), 'wc_version' => WC()->version, 'routes' => array(), 'meta' => array('timezone' => wc_timezone_string(), 'currency' => get_woocommerce_currency(), 'currency_format' => get_woocommerce_currency_symbol(), 'currency_position' => get_option('woocommerce_currency_pos'), 'thousand_separator' => get_option('woocommerce_price_decimal_sep'), 'decimal_separator' => get_option('woocommerce_price_thousand_sep'), 'price_num_decimals' => wc_get_price_decimals(), 'tax_included' => wc_prices_include_tax(), 'weight_unit' => get_option('woocommerce_weight_unit'), 'dimension_unit' => get_option('woocommerce_dimension_unit'), 'ssl_enabled' => 'yes' === get_option('woocommerce_force_ssl_checkout'), 'permalinks_enabled' => '' !== get_option('permalink_structure'), 'links' => array('help' => 'http://woothemes.github.io/woocommerce-rest-api-docs/'))));
     // Find the available routes
     foreach ($this->get_routes() as $route => $callbacks) {
         $data = array();
         $route = preg_replace('#\\(\\?P(<\\w+?>).*?\\)#', '$1', $route);
         foreach (self::$method_map as $name => $bitmask) {
             foreach ($callbacks as $callback) {
                 // Skip to the next route if any callback is hidden
                 if ($callback[1] & self::HIDDEN_ENDPOINT) {
                     continue 3;
                 }
                 if ($callback[1] & $bitmask) {
                     $data['supports'][] = $name;
                 }
                 if ($callback[1] & self::ACCEPT_DATA) {
                     $data['accepts_data'] = true;
                 }
                 // For non-variable routes, generate links
                 if (strpos($route, '<') === false) {
                     $data['meta'] = array('self' => get_woocommerce_api_url($route));
                 }
             }
         }
         $available['store']['routes'][$route] = apply_filters('woocommerce_api_endpoints_description', $data);
     }
     return apply_filters('woocommerce_api_index', $available);
 }

 /**
  * Return a meta query for filtering by price.
  * @return array
  */
 private function price_filter_meta_query()
 {
     if (isset($_GET['max_price']) || isset($_GET['min_price'])) {
         $min = isset($_GET['min_price']) ? floatval($_GET['min_price']) : 0;
         $max = isset($_GET['max_price']) ? floatval($_GET['max_price']) : 9999999999.0;
         // If displaying prices in the shop including taxes, but prices don't include taxes..
         if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
             $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
             foreach ($tax_classes as $tax_class) {
                 $tax_rates = WC_Tax::get_rates($tax_class);
                 $class_min = $min - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($min, $tax_rates));
                 $class_max = $max - WC_Tax::get_tax_total(WC_Tax::calc_inclusive_tax($max, $tax_rates));
                 if ($class_min < $min) {
                     $min = $class_min;
                 }
                 if ($class_max > $max) {
                     $max = $class_max;
                 }
             }
         }
         return array('key' => '_price', 'value' => array($min, $max), 'compare' => 'BETWEEN', 'type' => 'DECIMAL', 'price_filter' => true);
     }
     return array();
 }

function wc_update_230_options()
{
    // _money_spent and _order_count may be out of sync - clear them
    delete_metadata('user', 0, '_money_spent', '', true);
    delete_metadata('user', 0, '_order_count', '', true);
    // To prevent taxes being hidden when using a default 'no address' in a store with tax inc prices, set the woocommerce_default_customer_address to use the store base address by default
    if ('' === get_option('woocommerce_default_customer_address', false) && wc_prices_include_tax()) {
        update_option('woocommerce_default_customer_address', 'base');
    }
}

 /**
  * Restore renewal flag when cart is reset and modify Product object with renewal order related info
  *
  * @since 2.0
  */
 public function get_cart_item_from_session($cart_item_session_data, $cart_item, $key)
 {
     if (isset($cart_item[$this->cart_item_key]['subscription_id'])) {
         $cart_item_session_data[$this->cart_item_key] = $cart_item[$this->cart_item_key];
         $_product = $cart_item_session_data['data'];
         // Need to get the original subscription price, not the current price
         $subscription = wcs_get_subscription($cart_item[$this->cart_item_key]['subscription_id']);
         if ($subscription) {
             $subscription_items = $subscription->get_items();
             $item_to_renew = $subscription_items[$cart_item_session_data[$this->cart_item_key]['subscription_line_item_id']];
             $price = $item_to_renew['line_subtotal'];
             if (wc_prices_include_tax()) {
                 $base_tax_rates = WC_Tax::get_base_tax_rates($_product->tax_class);
                 $base_taxes_on_item = WC_Tax::calc_tax($price, $base_tax_rates, false, false);
                 $price += array_sum($base_taxes_on_item);
             }
             $_product->price = $price / $item_to_renew['qty'];
             // Don't carry over any sign up fee
             $_product->subscription_sign_up_fee = 0;
             $_product->post->post_title = apply_filters('woocommerce_subscriptions_renewal_product_title', $_product->get_title(), $_product);
             // Make sure the same quantity is renewed
             $cart_item_session_data['quantity'] = $item_to_renew['qty'];
         }
     }
     return $cart_item_session_data;
 }

    /**
     * widget function.
     *
     * @see WP_Widget
     *
     * @param array $args
     * @param array $instance
     */
    public function widget($args, $instance)
    {
        global $_chosen_attributes, $wpdb, $wp;
        if (!is_post_type_archive('product') && !is_tax(get_object_taxonomies('product'))) {
            return;
        }
        if (sizeof(WC()->query->unfiltered_product_ids) == 0) {
            return;
            // None shown - return
        }
        $min_price = isset($_GET['min_price']) ? esc_attr($_GET['min_price']) : '';
        $max_price = isset($_GET['max_price']) ? esc_attr($_GET['max_price']) : '';
        wp_enqueue_script('wc-price-slider');
        // Remember current filters/search
        $fields = '';
        if (get_search_query()) {
            $fields .= '<input type="hidden" name="s" value="' . get_search_query() . '" />';
        }
        if (!empty($_GET['post_type'])) {
            $fields .= '<input type="hidden" name="post_type" value="' . esc_attr($_GET['post_type']) . '" />';
        }
        if (!empty($_GET['product_cat'])) {
            $fields .= '<input type="hidden" name="product_cat" value="' . esc_attr($_GET['product_cat']) . '" />';
        }
        if (!empty($_GET['product_tag'])) {
            $fields .= '<input type="hidden" name="product_tag" value="' . esc_attr($_GET['product_tag']) . '" />';
        }
        if (!empty($_GET['orderby'])) {
            $fields .= '<input type="hidden" name="orderby" value="' . esc_attr($_GET['orderby']) . '" />';
        }
        if ($_chosen_attributes) {
            foreach ($_chosen_attributes as $attribute => $data) {
                $taxonomy_filter = 'filter_' . str_replace('pa_', '', $attribute);
                $fields .= '<input type="hidden" name="' . esc_attr($taxonomy_filter) . '" value="' . esc_attr(implode(',', $data['terms'])) . '" />';
                if ('or' == $data['query_type']) {
                    $fields .= '<input type="hidden" name="' . esc_attr(str_replace('pa_', 'query_type_', $attribute)) . '" value="or" />';
                }
            }
        }
        if (0 === sizeof(WC()->query->layered_nav_product_ids)) {
            $min = floor($wpdb->get_var("\n\t\t\t\tSELECT min(meta_value + 0)\n\t\t\t\tFROM {$wpdb->posts} as posts\n\t\t\t\tLEFT JOIN {$wpdb->postmeta} as postmeta ON posts.ID = postmeta.post_id\n\t\t\t\tWHERE meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price', '_min_variation_price')))) . "')\n\t\t\t\tAND meta_value != ''\n\t\t\t"));
            $max = ceil($wpdb->get_var("\n\t\t\t\tSELECT max(meta_value + 0)\n\t\t\t\tFROM {$wpdb->posts} as posts\n\t\t\t\tLEFT JOIN {$wpdb->postmeta} as postmeta ON posts.ID = postmeta.post_id\n\t\t\t\tWHERE meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t"));
        } else {
            $min = floor($wpdb->get_var("\n\t\t\t\tSELECT min(meta_value + 0)\n\t\t\t\tFROM {$wpdb->posts} as posts\n\t\t\t\tLEFT JOIN {$wpdb->postmeta} as postmeta ON posts.ID = postmeta.post_id\n\t\t\t\tWHERE meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price', '_min_variation_price')))) . "')\n\t\t\t\tAND meta_value != ''\n\t\t\t\tAND (\n\t\t\t\t\tposts.ID IN (" . implode(',', array_map('absint', WC()->query->layered_nav_product_ids)) . ")\n\t\t\t\t\tOR (\n\t\t\t\t\t\tposts.post_parent IN (" . implode(',', array_map('absint', WC()->query->layered_nav_product_ids)) . ")\n\t\t\t\t\t\tAND posts.post_parent != 0\n\t\t\t\t\t)\n\t\t\t\t)\n\t\t\t"));
            $max = ceil($wpdb->get_var("\n\t\t\t\tSELECT max(meta_value + 0)\n\t\t\t\tFROM {$wpdb->posts} as posts\n\t\t\t\tLEFT JOIN {$wpdb->postmeta} as postmeta ON posts.ID = postmeta.post_id\n\t\t\t\tWHERE meta_key IN ('" . implode("','", array_map('esc_sql', apply_filters('woocommerce_price_filter_meta_keys', array('_price')))) . "')\n\t\t\t\tAND (\n\t\t\t\t\tposts.ID IN (" . implode(',', array_map('absint', WC()->query->layered_nav_product_ids)) . ")\n\t\t\t\t\tOR (\n\t\t\t\t\t\tposts.post_parent IN (" . implode(',', array_map('absint', WC()->query->layered_nav_product_ids)) . ")\n\t\t\t\t\t\tAND posts.post_parent != 0\n\t\t\t\t\t)\n\t\t\t\t)\n\t\t\t"));
        }
        if ($min == $max) {
            return;
        }
        $this->widget_start($args, $instance);
        if ('' == get_option('permalink_structure')) {
            $form_action = remove_query_arg(array('page', 'paged'), add_query_arg($wp->query_string, '', home_url($wp->request)));
        } else {
            $form_action = preg_replace('%\\/page/[0-9]+%', '', home_url(trailingslashit($wp->request)));
        }
        if (wc_tax_enabled() && 'incl' === get_option('woocommerce_tax_display_shop') && !wc_prices_include_tax()) {
            $tax_classes = array_merge(array(''), WC_Tax::get_tax_classes());
            $min = 0;
            foreach ($tax_classes as $tax_class) {
                $tax_rates = WC_Tax::get_rates($tax_class);
                $class_min = $min + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($min, $tax_rates));
                $class_max = $max + WC_Tax::get_tax_total(WC_Tax::calc_exclusive_tax($max, $tax_rates));
                if ($min === 0 || $class_min < $min) {
                    $min = $class_min;
                }
                if ($class_max > $max) {
                    $max = $class_max;
                }
            }
        }
        echo '<form method="get" action="' . esc_url($form_action) . '">
			<div class="price_slider_wrapper">
				<div class="price_slider" style="display:none;"></div>
				<div class="price_slider_amount">
					<input type="text" id="min_price" name="min_price" value="' . esc_attr($min_price) . '" data-min="' . esc_attr(apply_filters('woocommerce_price_filter_widget_min_amount', $min)) . '" placeholder="' . esc_attr__('Min price', 'woocommerce') . '" />
					<input type="text" id="max_price" name="max_price" value="' . esc_attr($max_price) . '" data-max="' . esc_attr(apply_filters('woocommerce_price_filter_widget_max_amount', $max)) . '" placeholder="' . esc_attr__('Max price', 'woocommerce') . '" />
					<button type="submit" class=" filter">' . __('Filter', 'woocommerce') . '</button>
					<div class="price_label price-input" style="display:none;">
						' . __('Price:', 'woocommerce') . ' <span class="from"></span> &mdash; <span class="to"></span>
					</div>
					' . $fields . '
					<div class="clear"></div>
				</div>
			</div>
		</form>';
        $this->widget_end($args);
    }

<?php

/**
 * Update WC to 2.3.0
 *
 * @author 		WooThemes
 * @category 	Admin
 * @package 	WooCommerce/Admin/Updates
 * @version     2.3.0
 */
if (!defined('ABSPATH')) {
    exit;
}
// _money_spent and _order_count may be out of sync - clear them
delete_metadata('user', 0, '_money_spent', '', true);
delete_metadata('user', 0, '_order_count', '', true);
// To prevent taxes being hidden when using a default 'no address' in a store with tax inc prices, set the woocommerce_default_customer_address to use the store base address by default
if ('' === get_option('woocommerce_default_customer_address', false) && wc_prices_include_tax()) {
    update_option('woocommerce_default_customer_address', 'base');
}

 /**
  * Calculates a price (could be per period price or sign-up fee) for a subscription less tax
  * if the subscription is taxable and the prices in the store include tax.
  *
  * Based on the WC_Product::get_price_excluding_tax() function.
  *
  * @param float $price The price to adjust based on taxes
  * @param WC_Product $product The product the price belongs too (needed to determine tax class)
  * @since 1.0
  */
 public static function calculate_tax_for_subscription($price, $product, $deduct_base_taxes = false)
 {
     _deprecated_function(__METHOD__, '1.5.8', 'WC_Product::get_price_including_tax()');
     if ($product->is_taxable()) {
         $tax = new WC_Tax();
         $base_tax_rates = $tax->get_shop_base_rate($product->tax_class);
         $tax_rates = $tax->get_rates($product->get_tax_class());
         // This will get the base rate unless we're on the checkout page
         if ($deduct_base_taxes && wc_prices_include_tax()) {
             $base_taxes = $tax->calc_tax($price, $base_tax_rates, true);
             $taxes = $tax->calc_tax($price - array_sum($base_taxes), $tax_rates, false);
         } elseif (get_option('woocommerce_prices_include_tax') == 'yes') {
             $taxes = $tax->calc_tax($price, $base_tax_rates, true);
         } else {
             $taxes = $tax->calc_tax($price, $base_tax_rates, false);
         }
         $tax_amount = $tax->get_tax_total($taxes);
     } else {
         $tax_amount = 0;
     }
     return $tax_amount;
 }

 /**
  * Get the customer tax location based on their status and the current page.
  *
  * Used by get_rates(), get_shipping_rates().
  *
  * @param  $tax_class string Optional, passed to the filter for advanced tax setups.
  * @return array
  */
 public static function get_tax_location($tax_class = '')
 {
     $location = array();
     if (!empty(WC()->customer)) {
         $location = WC()->customer->get_taxable_address();
     } elseif (wc_prices_include_tax() || 'base' === get_option('woocommerce_default_customer_address') || 'base' === get_option('woocommerce_tax_based_on')) {
         $location = array(WC()->countries->get_base_country(), WC()->countries->get_base_state(), WC()->countries->get_base_postcode(), WC()->countries->get_base_city());
     }
     return apply_filters('woo