[Payments] Add the pay button, and control its enabled state

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

 // Copyright 2016 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_sheet_view_controller.h"
 
 #include <algorithm>
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/browser_process.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_row_view.h"
 #include "chrome/browser/ui/views/payments/payment_request_views_util.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/autofill/core/browser/autofill_type.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/field_types.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
-#include "components/payments/content/payment_request.h"
 #include "components/payments/core/currency_formatter.h"
 #include "components/strings/grit/components_strings.h"
 #include "content/public/browser/web_contents.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/gfx/color_utils.h"
 #include "ui/gfx/font.h"
 #include "ui/gfx/paint_vector_icon.h"
 #include "ui/gfx/range/range.h"
-#include "ui/views/controls/button/label_button.h"
 #include "ui/views/controls/button/md_text_button.h"
 #include "ui/views/controls/image_view.h"
 #include "ui/views/controls/label.h"
 #include "ui/views/controls/styled_label.h"
 #include "ui/views/layout/fill_layout.h"
 #include "ui/views/layout/grid_layout.h"
 #include "ui/views/vector_icons.h"
 #include "ui/views/view.h"
 
 namespace payments {
 namespace {
 
 constexpr int kFirstTagValue = static_cast<int>(
     payments::PaymentRequestCommonTags::PAYMENT_REQUEST_COMMON_TAG_MAX);
 
 enum class PaymentSheetViewControllerTags {
   // The tag for the button that navigates to the Order Summary sheet.
   SHOW_ORDER_SUMMARY_BUTTON = kFirstTagValue,
   SHOW_SHIPPING_BUTTON,
   SHOW_PAYMENT_METHOD_BUTTON,
   SHOW_CONTACT_INFO_BUTTON,
+  PAY_BUTTON
 };
 
 int ComputeWidestNameColumnViewWidth() {
   // The name colums in each row should all have the same width, large enough to
   // accomodate the longest piece of text they contain. Because of this, each
   // row's GridLayout requires its first column to have a fixed width of the
   // correct size. To measure the required size, layout a label with each
   // section name, measure its width, then initialize |widest_column_width|
   // with the largest value.
   std::vector<int> section_names{
@@ skipping 93 matching lines @@
 
   return std::move(row);
 }
 
 }  // namespace
 
 PaymentSheetViewController::PaymentSheetViewController(
     PaymentRequest* request,
     PaymentRequestDialogView* dialog)
     : PaymentRequestSheetController(request, dialog),
-      widest_name_column_view_width_(ComputeWidestNameColumnViewWidth()) {}
+      pay_button_(nullptr),
+      widest_name_column_view_width_(ComputeWidestNameColumnViewWidth()) {
+  request->AddObserver(this);
+}
 
 PaymentSheetViewController::~PaymentSheetViewController() {}
 
 std::unique_ptr<views::View> PaymentSheetViewController::CreateView() {
   std::unique_ptr<views::View> content_view = base::MakeUnique<views::View>();
 
   views::GridLayout* layout = new views::GridLayout(content_view.get());
   content_view->SetLayoutManager(layout);
   views::ColumnSet* columns = layout->AddColumnSet(0);
   columns->AddColumn(views::GridLayout::FILL, views::GridLayout::CENTER,
                      1, views::GridLayout::USE_PREF, 0, 0);
 
   layout->StartRow(0, 0);
   layout->AddView(CreatePaymentSheetSummaryRow().release());
   layout->StartRow(1, 0);
   layout->AddView(CreateShippingRow().release());
   layout->StartRow(0, 0);
   layout->AddView(CreatePaymentMethodRow().release());
   layout->StartRow(1, 0);
   layout->AddView(CreateContactInfoRow().release());
 
   return CreatePaymentView(
       CreateSheetHeaderView(
           false,
           l10n_util::GetStringUTF16(IDS_PAYMENT_REQUEST_PAYMENT_SHEET_TITLE),
           this),
       std::move(content_view));
 }
 
+std::unique_ptr<views::Button>
+PaymentSheetViewController::CreatePrimaryButton() {
+  std::unique_ptr<views::Button> button(
+      views::MdTextButton::CreateSecondaryUiBlueButton(
+          this, l10n_util::GetStringUTF16(IDS_PAYMENTS_PAY_BUTTON)));
+  button->set_tag(static_cast<int>(PaymentRequestCommonTags::PAY_BUTTON_TAG));
+  button->set_id(static_cast<int>(DialogViewID::PAYMENT_SHEET_PAY_BUTTON));
+  pay_button_ = button.get();
+  UpdatePayButtonState(request()->is_ready_to_pay());
+  return button;
+}
+
+void PaymentSheetViewController::OnSelectedInformationChanged() {
+  UpdatePayButtonState(request()->is_ready_to_pay());
+}
+
 void PaymentSheetViewController::ButtonPressed(
     views::Button* sender, const ui::Event& event) {
   switch (sender->tag()) {
     case static_cast<int>(
         PaymentSheetViewControllerTags::SHOW_ORDER_SUMMARY_BUTTON):
       dialog()->ShowOrderSummary();
       break;
 
     case static_cast<int>(PaymentSheetViewControllerTags::SHOW_SHIPPING_BUTTON):
       dialog()->ShowShippingListSheet();
       break;
 
     case static_cast<int>(
         PaymentSheetViewControllerTags::SHOW_PAYMENT_METHOD_BUTTON):
       dialog()->ShowPaymentMethodSheet();
       break;
 
     case static_cast<int>(
         PaymentSheetViewControllerTags::SHOW_CONTACT_INFO_BUTTON):
       // TODO(tmartino): Transition to contact info page once it exists.
       break;
 
     default:
       PaymentRequestSheetController::ButtonPressed(sender, event);
       break;
   }
 }
 
+void PaymentSheetViewController::UpdatePayButtonState(bool enabled) {
+  pay_button_->SetEnabled(enabled);
+}
+
 std::unique_ptr<views::View>
 PaymentSheetViewController::CreateOrderSummarySectionContent() {
   CurrencyFormatter* formatter = request()->GetOrCreateCurrencyFormatter(
       request()->details()->total->amount->currency,
       request()->details()->total->amount->currency_system,
       g_browser_process->GetApplicationLocale());
   base::string16 label_value = l10n_util::GetStringFUTF16(
       IDS_PAYMENT_REQUEST_ORDER_SUMMARY_SECTION_TOTAL_FORMAT,
       base::UTF8ToUTF16(request()->details()->total->label),
       base::UTF8ToUTF16(formatter->formatted_currency_code()),
@@ skipping 126 matching lines @@
       CreateContactInfoSectionContent(), std::unique_ptr<views::View>(nullptr),
       widest_name_column_view_width_);
   section->set_tag(static_cast<int>(
       PaymentSheetViewControllerTags::SHOW_CONTACT_INFO_BUTTON));
   section->set_id(
       static_cast<int>(DialogViewID::PAYMENT_SHEET_CONTACT_INFO_SECTION));
   return section;
 }
 
 }  // namespace payments