[Payments] Add combobox support to editors.

chrome/browser/ui/views/payments/credit_card_editor_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/credit_card_editor_view_controller.h"
 
 #include <utility>
 
 #include "base/memory/ptr_util.h"
 #include "base/strings/string16.h"
+#include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
+#include "base/time/time.h"
 #include "chrome/browser/ui/views/payments/payment_request_dialog_view.h"
+#include "chrome/browser/ui/views/payments/validating_combobox.h"
+#include "chrome/browser/ui/views/payments/validating_textfield.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/validation.h"
+#include "components/autofill/core/common/autofill_clock.h"
 #include "components/autofill/core/common/autofill_constants.h"
 #include "components/payments/payment_request.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/views/controls/textfield/textfield.h"
 
 namespace payments {
 
+namespace {
+
+// Number of years (including the current one) to be shown in the expiration
+// year dropdown.
+const size_t kNumberOfExpirationYears = 10u;
+
+// Returns the items that are in the expiration month dropdown.
+std::vector<base::string16> GetExpirationMonthItems() {
+  std::vector<base::string16> months;
+  months.reserve(12);
+
+  base::Time::Exploded now_exploded;
+  autofill::AutofillClock::Now().LocalExplode(&now_exploded);
+  int wrapped = 0;
+  for (int i = 0; i < 12; i++) {
+    int month = (now_exploded.month + i + wrapped) % 13;
+    if (month == 0) {
+      month = 1;
+      wrapped = 1;
+    }
+    months.push_back(base::UTF8ToUTF16(base::StringPrintf("%02d", month)));
+  }
+  return months;
+}
+
+// Returns the items that are in the expiration year dropdown.
+std::vector<base::string16> GetExpirationYearItems() {
+  std::vector<base::string16> years;
+  years.reserve(kNumberOfExpirationYears);
+
+  base::Time::Exploded now_exploded;
+  autofill::AutofillClock::Now().LocalExplode(&now_exploded);
+  for (size_t i = 0u; i < kNumberOfExpirationYears; i++) {
+    years.push_back(base::UTF8ToUTF16(std::to_string(now_exploded.year + i)));
+  }
+  return years;
+}
+
+}  // namespace
+
 CreditCardEditorViewController::CreditCardEditorViewController(
     PaymentRequest* request,
     PaymentRequestDialogView* dialog)
     : EditorViewController(request, dialog) {}
 
 CreditCardEditorViewController::~CreditCardEditorViewController() {}
 
 std::vector<EditorField> CreditCardEditorViewController::GetFieldDefinitions() {
   return std::vector<EditorField>{
       {autofill::CREDIT_CARD_NAME_FULL,
        l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_NAME_ON_CARD),
        EditorField::LengthHint::HINT_LONG, true},
       {autofill::CREDIT_CARD_NUMBER,
        l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_CREDIT_CARD_NUMBER),
        EditorField::LengthHint::HINT_LONG, true},
-      {autofill::CREDIT_CARD_EXP_DATE_2_DIGIT_YEAR,
-       l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_EXPIRATION_DATE),
-       EditorField::LengthHint::HINT_SHORT, true}};
+      {autofill::CREDIT_CARD_EXP_MONTH,
+       l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_EXPIRATION_MONTH),
+       EditorField::LengthHint::HINT_SHORT, true,
+       EditorField::ControlType::COMBOBOX},
+      {autofill::CREDIT_CARD_EXP_4_DIGIT_YEAR,
+       l10n_util::GetStringUTF16(IDS_AUTOFILL_FIELD_LABEL_EXPIRATION_YEAR),
+       EditorField::LengthHint::HINT_SHORT, true,
+       EditorField::ControlType::COMBOBOX}};
 }
 
 bool CreditCardEditorViewController::ValidateModelAndSave() {
   autofill::CreditCard credit_card;
   credit_card.set_origin(autofill::kSettingsOrigin);
   for (const auto& field : text_fields()) {
     // ValidatingTextfield* is the key, EditorField is the value.
     DCHECK_EQ(autofill::CREDIT_CARD,
               autofill::AutofillType(field.second.type).group());
     if (field.first->invalid())
       return false;
 
     credit_card.SetRawInfo(field.second.type, field.first->text());
   }
+  for (const auto& field : comboboxes()) {

[Mathieu, 2017/02/15 03:15:57]

I'm not a huge fan of repeating this code here. I've thought of having a common
type for ValidatingTextfield and ValidatingCombobox (ValidatingInput?) which
defines value() and invalid() so that I could have one map, and iterate once to
validate. In the end it adds a lot of cruft for just these few repeated lines.
Let me know what you think 

+    // ValidatingCombobox* is the key, EditorField is the value.
+    DCHECK_EQ(autofill::CREDIT_CARD,
+              autofill::AutofillType(field.second.type).group());
+    ValidatingCombobox* combobox = field.first;
+    if (combobox->invalid())
+      return false;
+
+    credit_card.SetRawInfo(field.second.type,
+                           combobox->GetTextForRow(combobox->selected_index()));
+  }
 
   // TODO(mathp): Display global error message.
   if (!credit_card.IsValid())
     return false;
 
   // Add the card (will not add a duplicate).
   request()->personal_data_manager()->AddCreditCard(credit_card);
 
   return true;
 }
 
-std::unique_ptr<ValidatingTextfield::Delegate>
+std::unique_ptr<ValidationDelegate>
 CreditCardEditorViewController::CreateValidationDelegate(
     const EditorField& field) {
-  return base::MakeUnique<CreditCardEditorViewController::ValidationDelegate>(
-      field);
+  return base::MakeUnique<
+      CreditCardEditorViewController::CreditCardValidationDelegate>(field);
 }
 
-CreditCardEditorViewController::ValidationDelegate::ValidationDelegate(
-    const EditorField& field)
+std::unique_ptr<ui::ComboboxModel>
+CreditCardEditorViewController::GetComboboxModelForType(
+    const autofill::ServerFieldType& type) {
+  switch (type) {
+    case autofill::CREDIT_CARD_EXP_MONTH:
+      return std::unique_ptr<ui::ComboboxModel>(
+          new ui::SimpleComboboxModel(GetExpirationMonthItems()));
+    case autofill::CREDIT_CARD_EXP_4_DIGIT_YEAR:
+      return std::unique_ptr<ui::ComboboxModel>(
+          new ui::SimpleComboboxModel(GetExpirationYearItems()));
+    default:
+      NOTREACHED();
+      break;
+  }
+  return std::unique_ptr<ui::ComboboxModel>();
+}
+
+CreditCardEditorViewController::CreditCardValidationDelegate::
+    CreditCardValidationDelegate(const EditorField& field)
     : field_(field) {}
-CreditCardEditorViewController::ValidationDelegate::~ValidationDelegate() {}
+CreditCardEditorViewController::CreditCardValidationDelegate::
+    ~CreditCardValidationDelegate() {}
 
-bool CreditCardEditorViewController::ValidationDelegate::ValidateTextfield(
-    views::Textfield* textfield) {
-  if (!textfield->text().empty()) {
+bool CreditCardEditorViewController::CreditCardValidationDelegate::
+    ValidateTextfield(views::Textfield* textfield) {
+  return ValidateValue(textfield->text());
+}
+
+bool CreditCardEditorViewController::CreditCardValidationDelegate::
+    ValidateCombobox(views::Combobox* combobox) {
+  return ValidateValue(combobox->GetTextForRow(combobox->selected_index()));
+}
+
+bool CreditCardEditorViewController::CreditCardValidationDelegate::
+    ValidateValue(const base::string16& value) {
+  if (!value.empty()) {
     base::string16 error_message;
     // TODO(mathp): Display |error_message| around |textfield|.
-    return autofill::IsValidForType(textfield->text(), field_.type,
-                                    &error_message);
+    return autofill::IsValidForType(value, field_.type, &error_message);
   }
 
   // TODO(mathp): Display "required" error if applicable.
   return !field_.required;
 }
 
 }  // namespace payments