[FIX] point_of_sale: wrong price on receipt fix

Before this commit, if a user select option 'tax-Included Price' in pricing
from pos.config and sale product with a discount, it is first displaying
price without tax instead of the price including tax.

Task-2002464
Closes #33733

closes odoo/odoo#34259

Signed-off-by: Nicolas Martinelli (nim) <nim@odoo.com>

addons/point_of_sale/static/src/js/models.js

@@ -1573,6 +1573,7 @@ exports.Orderline = Backbone.Model.extend({
             price_display :     this.get_display_price(),
             price_with_tax :    this.get_price_with_tax(),
             price_without_tax:  this.get_price_without_tax(),
+            price_with_tax_before_discount:  this.get_price_with_tax_before_discount(),
             tax:                this.get_tax(),
             product_description:      this.get_product().description,
             product_description_sale: this.get_product().description_sale,
@@ -1669,6 +1670,9 @@ exports.Orderline = Backbone.Model.extend({
     get_price_with_tax: function(){
         return this.get_all_prices().priceWithTax;
     },
+    get_price_with_tax_before_discount: function () {
+        return this.get_all_prices().priceWithTaxBeforeDiscount;
+    },
     get_tax: function(){
         return this.get_all_prices().tax;
     },
@@ -1822,6 +1826,7 @@ exports.Orderline = Backbone.Model.extend({
         });
 
         var all_taxes = this.compute_all(product_taxes, price_unit, this.get_quantity(), this.pos.currency.rounding);
+        var all_taxes_before_discount = this.compute_all(product_taxes, this.get_unit_price(), this.get_quantity(), this.pos.currency.rounding);
         _(all_taxes.taxes).each(function(tax) {
             taxtotal += tax.amount;
             taxdetail[tax.id] = tax.amount;
@@ -1831,6 +1836,7 @@ exports.Orderline = Backbone.Model.extend({
             "priceWithTax": all_taxes.total_included,
             "priceWithoutTax": all_taxes.total_excluded,
             "priceSumTaxVoid": all_taxes.total_void,
+            "priceWithTaxBeforeDiscount": all_taxes_before_discount.total_included,
             "tax": taxtotal,
             "taxDetails": taxdetail,
         };

addons/point_of_sale/static/src/xml/pos.xml

@@ -812,7 +812,12 @@
                             <line indent='1'>
                                 <left>
                                     <value t-att-value-decimals='pos.dp["Product Price"]'>
-                                        <t t-esc="line.price_lst" />
+                                        <t t-if="pos.config.iface_tax_included === 'total'">
+                                            <t t-esc="line.price_with_tax_before_discount" />
+                                        </t>
+                                        <t t-else="">
+                                            <t t-esc="line.price_lst" />
+                                        </t>
                                     </value>
                                 </left>
                             </line>