[Payments] Implements the credit card editor for Desktop UI

chrome/browser/ui/views/payments/payment_method_view_controller.cc

 // 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.
 
 #include "chrome/browser/ui/views/payments/payment_method_view_controller.h"
 
 #include <memory>
 #include <utility>
 
-#include "base/logging.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
+#include "chrome/browser/ui/views/payments/payment_request_dialog_view_ids.h"
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
+#include "chrome/grit/generated_resources.h"
 #include "components/payments/payment_request.h"
 #include "components/strings/grit/components_strings.h"
 #include "ui/base/l10n/l10n_util.h"
+#include "ui/views/controls/button/label_button.h"
+#include "ui/views/controls/button/md_text_button.h"
+#include "ui/views/layout/fill_layout.h"
 
 namespace payments {
 
+namespace {
+
+constexpr int kFirstTagValue = static_cast<int>(
+    payments::PaymentRequestCommonTags::PAYMENT_REQUEST_COMMON_TAG_MAX);
+
+enum class PaymentMethodViewControllerTags : int {
+  // The tag for the button that triggers the "add card" flow. Starts at
+  // |kFirstTagValue| not to conflict with tags common to all views.
+  ADD_CREDIT_CARD_BUTTON = kFirstTagValue,
+};
+
+}  // namespace
+
 PaymentMethodViewController::PaymentMethodViewController(
     PaymentRequest* request,
     PaymentRequestDialogView* dialog)
     : PaymentRequestSheetController(request, dialog) {}
 
 PaymentMethodViewController::~PaymentMethodViewController() {}
 
 std::unique_ptr<views::View> PaymentMethodViewController::CreateView() {
   std::unique_ptr<views::View> content_view = base::MakeUnique<views::View>();
 
-  // TODO(anthonyvd): populate this view.
+  views::FillLayout* layout = new views::FillLayout();
+  content_view->SetLayoutManager(layout);
+
+  // Create the "Add a card" button.
+  views::LabelButton* button = views::MdTextButton::CreateSecondaryUiButton(
+      this, l10n_util::GetStringUTF16(IDS_AUTOFILL_ADD_CREDITCARD_CAPTION));
+  button->set_tag(static_cast<int>(
+      PaymentMethodViewControllerTags::ADD_CREDIT_CARD_BUTTON));
+  button->set_id(
+      static_cast<int>(DialogViewID::PAYMENT_METHOD_ADD_CARD_BUTTON));
+  content_view->AddChildView(button);
 
   return CreatePaymentView(CreateSheetHeaderView(
           true,
           l10n_util::GetStringUTF16(
               IDS_PAYMENT_REQUEST_PAYMENT_METHOD_SECTION_NAME),
           this),
       std::move(content_view));
 }
 
+void PaymentMethodViewController::ButtonPressed(views::Button* sender,
+                                                const ui::Event& event) {
+  switch (sender->tag()) {
+    case static_cast<int>(
+        PaymentMethodViewControllerTags::ADD_CREDIT_CARD_BUTTON):
+      dialog()->ShowCreditCardEditor();
+      break;
+    default:
+      PaymentRequestSheetController::ButtonPressed(sender, event);
+      break;
+  }
+}
+
 }  // namespace payments