[Payments] Desktop: implement shipping address/option change

components/payments/content/payment_request_spec.h

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_SPEC_H_
 #define COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_SPEC_H_
 
 #include <set>
 #include <string>
 #include <vector>
@@ skipping 14 matching lines @@
 // certain occasions by the merchant (see API).
 class PaymentRequestSpec : public PaymentOptionsProvider {
  public:
   // Any class call add itself as Observer via AddObserver() and receive
   // notification about spec events.
   class Observer {
    public:
     // Called when the provided spec (details, options, method_data) is invalid.
     virtual void OnInvalidSpecProvided() = 0;
 
+    // Called when the provided spec has changed.
+    virtual void OnSpecUpdated() = 0;
+
    protected:
     virtual ~Observer() {}
   };
 
   PaymentRequestSpec(mojom::PaymentOptionsPtr options,
                      mojom::PaymentDetailsPtr details,
                      std::vector<mojom::PaymentMethodDataPtr> method_data,
                      PaymentRequestSpec::Observer* observer,
                      const std::string& app_locale);
   ~PaymentRequestSpec() override;
 
+  // Called when the merchant has new PaymentDetails. Will recompute every spec
+  // state that depends on |details|.
+  void UpdateWith(mojom::PaymentDetailsPtr details);
+
   void AddObserver(Observer* observer);
   void RemoveObserver(Observer* observer);
 
   // PaymentOptionsProvider:
   bool request_shipping() const override;
   bool request_payer_name() const override;
   bool request_payer_phone() const override;
   bool request_payer_email() const override;
   PaymentShippingType shipping_type() const override;
 
@@ skipping 11 matching lines @@
   // Uses CurrencyFormatter to format |amount| with the currency symbol for this
   // request's currency. Will use currency of the "total" display item, because
   // all items are supposed to have the same currency in a given request.
   base::string16 GetFormattedCurrencyAmount(const std::string& amount);
 
   // Uses CurrencyFormatter to get the formatted currency code for this
   // request's currency. Will use currency of the "total" display item, because
   // all items are supposed to have the same currency in a given request.
   std::string GetFormattedCurrencyCode();
 
+  mojom::PaymentShippingOption* selected_shipping_option() const {
+    return selected_shipping_option_;
+  }
+
   const mojom::PaymentDetails& details() const { return *details_.get(); }
 
  private:
+  friend class PaymentRequestDialogView;
+  void add_observer_for_testing(Observer* observer_for_testing) {
+    observer_for_testing_ = observer_for_testing;
+  }
+
   // Validates the |method_data| and fills |supported_card_networks_|.
   void PopulateValidatedMethodData(
       const std::vector<mojom::PaymentMethodDataPtr>& method_data);
 
+  // Updates the selected_shipping_option based on the data passed to this
+  // payment request by the website. This will set selected_shipping_option_ to
+  // the last option marked selected in the options array.
+  void UpdateSelectedShippingOption();
+
   // Will notify all observers that the spec is invalid.
   void NotifyOnInvalidSpecProvided();
+  // Will notify all observers that the spec has changed.
+  void NotifyOnSpecUpdated();
 
   // Returns the CurrencyFormatter instance for this PaymentRequest.
   // |locale_name| should be the result of the browser's GetApplicationLocale().
   // Note: Having multiple currencies per PaymentRequest is not supported; hence
   // the CurrencyFormatter is cached here.
   CurrencyFormatter* GetOrCreateCurrencyFormatter(
       const std::string& currency_code,
       const std::string& currency_system,
       const std::string& locale_name);
 
   mojom::PaymentOptionsPtr options_;
   mojom::PaymentDetailsPtr details_;
   const std::string app_locale_;
+  // The currently shipping option as specified by the merchant.
+  mojom::PaymentShippingOption* selected_shipping_option_;
+
   std::unique_ptr<CurrencyFormatter> currency_formatter_;
 
   // A list/set of supported basic card networks. The list is used to keep the
   // order in which they were specified by the merchant. The set is used for
   // fast lookup of supported methods.
   std::vector<std::string> supported_card_networks_;
   std::set<std::string> supported_card_networks_set_;
 
   // Only the set of basic-card specified networks. NOTE: callers should use
   // |supported_card_networks_set_| to check merchant support.
   std::set<std::string> basic_card_specified_networks_;
 
+  // The |observer_for_testing_| will fire after all the |observers_| have been
+  // notified.
   base::ObserverList<Observer> observers_;
+  Observer* observer_for_testing_;
 
   DISALLOW_COPY_AND_ASSIGN(PaymentRequestSpec);
 };
 
 }  // namespace payments
 
 #endif  // COMPONENTS_PAYMENTS_CONTENT_PAYMENT_REQUEST_SPEC_H_