Upstream Chrome on iOS source code [3/11].

ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.mm

Index: ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.mm
diff --git a/ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.mm b/ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.mm
new file mode 100644
index 0000000000000000000000000000000000000000..04b6fd630ce80c6bd414a14ea1a38355f8472a20
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+++ b/ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.mm
@@ -0,0 +1,588 @@
+// Copyright 2015 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 "ios/chrome/browser/ui/autofill/card_unmask_prompt_view_bridge.h"
+
+#include "base/bind.h"
+#include "base/ios/ios_util.h"
+#include "base/location.h"
+#include "base/mac/foundation_util.h"
+#include "base/single_thread_task_runner.h"
+#include "base/strings/sys_string_conversions.h"
+#include "base/threading/thread_task_runner_handle.h"
+#include "components/autofill/core/browser/ui/card_unmask_prompt_controller.h"
+#include "components/strings/grit/components_strings.h"
+#import "ios/chrome/browser/ui/autofill/cells/cvc_item.h"
+#import "ios/chrome/browser/ui/autofill/cells/status_item.h"
+#import "ios/chrome/browser/ui/autofill/cells/storage_switch_item.h"
+#import "ios/chrome/browser/ui/autofill/storage_switch_tooltip.h"
+#import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_controller.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h"
+#import "ios/chrome/browser/ui/rtl_geometry.h"
+#import "ios/third_party/material_components_ios/src/components/AppBar/src/MaterialAppBar.h"
+#import "ios/third_party/material_components_ios/src/components/Palettes/src/MaterialPalettes.h"
+#include "ui/base/l10n/l10n_util.h"
+
+namespace {
+
+const CGFloat kTitleVerticalSpacing = 2.0f;
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierMain = kSectionIdentifierEnumZero,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeCVC = kItemTypeEnumZero,
+  ItemTypeStatus,
+  ItemTypeStorageSwitch,
+};
+
+}  // namespace
+
+namespace autofill {
+
+#pragma mark CardUnmaskPromptViewBridge
+
+CardUnmaskPromptViewBridge::CardUnmaskPromptViewBridge(
+    CardUnmaskPromptController* controller)
+    : controller_(controller), weak_ptr_factory_(this) {
+  DCHECK(controller_);
+}
+
+CardUnmaskPromptViewBridge::~CardUnmaskPromptViewBridge() {
+  if (controller_)
+    controller_->OnUnmaskDialogClosed();
+}
+
+void CardUnmaskPromptViewBridge::Show() {
+  view_.reset([[CardUnmaskPromptViewIOS alloc] initWithBridge:this]);
+  // Present the view controller.
+  UIViewController* rootController =
+      [UIApplication sharedApplication].keyWindow.rootViewController;
+  [rootController presentViewController:view_ animated:YES completion:nil];
+}
+
+void CardUnmaskPromptViewBridge::ControllerGone() {
+  controller_ = nullptr;
+  PerformClose();
+}
+
+void CardUnmaskPromptViewBridge::DisableAndWaitForVerification() {
+  [view_ showSpinner];
+}
+
+void CardUnmaskPromptViewBridge::GotVerificationResult(
+    const base::string16& error_message,
+    bool allow_retry) {
+  if (error_message.empty()) {
+    [view_ showSuccess];
+    base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
+        FROM_HERE, base::Bind(&CardUnmaskPromptViewBridge::PerformClose,
+                              weak_ptr_factory_.GetWeakPtr()),
+        controller_->GetSuccessMessageDuration());
+  } else {
+    if (allow_retry) {
+      [view_ showCVCInputFormWithError:SysUTF16ToNSString(error_message)];
+    } else {
+      [view_ showError:SysUTF16ToNSString(error_message)];
+    }
+  }
+}
+
+CardUnmaskPromptController* CardUnmaskPromptViewBridge::GetController() {
+  return controller_;
+}
+
+void CardUnmaskPromptViewBridge::PerformClose() {
+  [view_ dismissViewControllerAnimated:YES
+                            completion:^{
+                              this->DeleteSelf();
+                            }];
+}
+
+void CardUnmaskPromptViewBridge::DeleteSelf() {
+  delete this;
+}
+
+}  // autofill
+
+@interface CardUnmaskPromptViewIOS ()<UITextFieldDelegate> {
+  base::scoped_nsobject<UIBarButtonItem> _cancelButton;
+  base::scoped_nsobject<UIBarButtonItem> _verifyButton;
+  base::scoped_nsobject<CVCItem> _CVCItem;
+  base::scoped_nsobject<StatusItem> _statusItem;
+  base::scoped_nsobject<StorageSwitchItem> _storageSwitchItem;
+
+  // The tooltip is added as a child of the collection view rather than the
+  // StorageSwitchContentView to allow it to overflow the bounds of the switch
+  // view.
+  base::scoped_nsobject<StorageSwitchTooltip> _storageSwitchTooltip;
+
+  // Owns |self|.
+  autofill::CardUnmaskPromptViewBridge* _bridge;  // weak
+}
+
+@end
+
+@implementation CardUnmaskPromptViewIOS
+
+- (instancetype)initWithBridge:(autofill::CardUnmaskPromptViewBridge*)bridge {
+  DCHECK(bridge);
+  self = [super initWithStyle:CollectionViewControllerStyleAppBar];
+  if (self) {
+    _bridge = bridge;
+  }
+  return self;
+}
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  self.styler.cellStyle = MDCCollectionViewCellStyleCard;
+
+  UILabel* titleLabel =
+      [[[UILabel alloc] initWithFrame:CGRectZero] autorelease];
+  titleLabel.text =
+      SysUTF16ToNSString(_bridge->GetController()->GetWindowTitle());
+  titleLabel.font = [UIFont boldSystemFontOfSize:16];
+  titleLabel.accessibilityTraits |= UIAccessibilityTraitHeader;
+  [titleLabel sizeToFit];
+
+  UIView* titleView = [[[UIView alloc] initWithFrame:CGRectZero] autorelease];
+  [titleView addSubview:titleLabel];
+  CGRect titleBounds = titleView.bounds;
+  titleBounds.origin.y -= kTitleVerticalSpacing;
+  titleView.bounds = titleBounds;
+  titleView.autoresizingMask = UIViewAutoresizingFlexibleLeadingMargin() |
+                               UIViewAutoresizingFlexibleBottomMargin;
+  self.appBar.navigationBar.titleView = titleView;
+
+  [self showCVCInputForm];
+
+  // Add the navigation buttons.
+  _cancelButton.reset([[UIBarButtonItem alloc]
+      initWithTitle:l10n_util::GetNSString(IDS_CANCEL)
+              style:UIBarButtonItemStylePlain
+             target:self
+             action:@selector(onCancel:)]);
+  self.navigationItem.leftBarButtonItem = _cancelButton;
+
+  NSString* verifyButtonText =
+      SysUTF16ToNSString(_bridge->GetController()->GetOkButtonLabel());
+  _verifyButton.reset([[UIBarButtonItem alloc]
+      initWithTitle:verifyButtonText
+              style:UIBarButtonItemStylePlain
+             target:self
+             action:@selector(onVerify:)]);
+  [_verifyButton setTitleTextAttributes:@{
+    NSForegroundColorAttributeName : [[MDCPalette cr_bluePalette] tint600]
+  }
+                               forState:UIControlStateNormal];
+  [_verifyButton setTitleTextAttributes:@{
+    NSForegroundColorAttributeName : [UIColor lightGrayColor]
+  }
+                               forState:UIControlStateDisabled];
+  [_verifyButton setEnabled:NO];
+  self.navigationItem.rightBarButtonItem = _verifyButton;
+}
+
+- (void)viewWillLayoutSubviews {
+  [super viewWillLayoutSubviews];
+  NSIndexPath* CVCIndexPath =
+      [self.collectionViewModel indexPathForItem:_CVCItem
+                         inSectionWithIdentifier:SectionIdentifierMain];
+  CVCCell* CVC = base::mac::ObjCCastStrict<CVCCell>(
+      [self.collectionView cellForItemAtIndexPath:CVCIndexPath]);
+  [self focusInputIfNeeded:CVC];
+}
+
+#pragma mark - CollectionViewController
+
+- (void)loadModel {
+  [super loadModel];
+  CollectionViewModel* model = self.collectionViewModel;
+  [model addSectionWithIdentifier:SectionIdentifierMain];
+
+  autofill::CardUnmaskPromptController* controller = _bridge->GetController();
+  NSString* instructions =
+      SysUTF16ToNSString(controller->GetInstructionsMessage());
+  int CVCImageResourceID = controller->GetCvcImageRid();
+  _CVCItem.reset([[CVCItem alloc] initWithType:ItemTypeCVC]);
+  _CVCItem.get().instructionsText = instructions;
+  _CVCItem.get().CVCImageResourceID = CVCImageResourceID;
+  [model addItem:_CVCItem toSectionWithIdentifier:SectionIdentifierMain];
+
+  if (controller->CanStoreLocally()) {
+    _storageSwitchItem.reset(
+        [[StorageSwitchItem alloc] initWithType:ItemTypeStorageSwitch]);
+    _storageSwitchItem.get().on = controller->GetStoreLocallyStartState();
+    [model addItem:_storageSwitchItem
+        toSectionWithIdentifier:SectionIdentifierMain];
+
+    _storageSwitchTooltip.reset([[StorageSwitchTooltip alloc] init]);
+    [_storageSwitchTooltip setHidden:YES];
+    [self.collectionView addSubview:_storageSwitchTooltip];
+  } else {
+    _storageSwitchItem.reset();
+  }
+
+  // No status item when loading the model.
+  _statusItem.reset();
+}
+
+#pragma mark - Private
+
+- (void)showCVCInputForm {
+  [self showCVCInputFormWithError:nil];
+}
+
+- (void)showCVCInputFormWithError:(NSString*)errorMessage {
+  [_verifyButton setEnabled:NO];
+
+  [self loadModel];
+  _CVCItem.get().errorMessage = errorMessage;
+  // If the server requested a new expiration date, show the date input. If it
+  // didn't and there was an error, show the "New card?" link which will show
+  // the date inputs on click. This link is intended to remind the user that
+  // they might have recently received a new card with updated expiration date
+  // and CVC. At the same time, we only put the CVC input in an error state if
+  // we're not requesting a new date. Because if we're asking the user for both,
+  // we don't know which is incorrect.
+  if (_bridge->GetController()->ShouldRequestExpirationDate()) {
+    _CVCItem.get().showDateInput = YES;
+  } else if (errorMessage) {
+    _CVCItem.get().showNewCardButton = YES;
+    _CVCItem.get().showCVCInputError = YES;
+  }
+}
+
+- (void)showSpinner {
+  [_verifyButton setEnabled:NO];
+  [_storageSwitchTooltip setHidden:YES];
+
+  [self
+      updateWithStatus:StatusItemState::VERIFYING
+                  text:l10n_util::GetNSString(
+                           IDS_AUTOFILL_CARD_UNMASK_VERIFICATION_IN_PROGRESS)];
+}
+
+- (void)showSuccess {
+  [_verifyButton setEnabled:NO];
+
+  [self updateWithStatus:StatusItemState::VERIFIED
+                    text:l10n_util::GetNSString(
+                             IDS_AUTOFILL_CARD_UNMASK_VERIFICATION_SUCCESS)];
+}
+
+- (void)showError:(NSString*)errorMessage {
+  [_cancelButton setTitle:l10n_util::GetNSString(IDS_CLOSE)];
+  [_verifyButton setEnabled:NO];
+
+  [self updateWithStatus:StatusItemState::ERROR text:errorMessage];
+}
+
+- (void)updateWithStatus:(StatusItemState)state text:(NSString*)text {
+  if (!_statusItem) {
+    _statusItem.reset([[StatusItem alloc] initWithType:ItemTypeStatus]);
+    _statusItem.get().text = text;
+    _statusItem.get().state = state;
+    // Remove all the present items to replace them with the status item.
+    [self.collectionViewModel
+        removeSectionWithIdentifier:SectionIdentifierMain];
+    [self.collectionViewModel addSectionWithIdentifier:SectionIdentifierMain];
+    [self.collectionViewModel addItem:_statusItem
+              toSectionWithIdentifier:SectionIdentifierMain];
+    [self.collectionView reloadData];
+  } else {
+    _statusItem.get().text = text;
+    _statusItem.get().state = state;
+    [self reconfigureCellsForItems:@[ _statusItem.get() ]
+           inSectionWithIdentifier:SectionIdentifierMain];
+    [self.collectionViewLayout invalidateLayout];
+  }
+}
+
+- (CGFloat)statusCellHeight {
+  const CGFloat collectionViewWidth =
+      CGRectGetWidth(self.collectionView.bounds);
+
+  // The status cell replaces the previous content of the collection. So it is
+  // sized based on what appears when not loading.
+  const CGFloat preferredHeightForCVC =
+      [MDCCollectionViewCell cr_preferredHeightForWidth:collectionViewWidth
+                                                forItem:_CVCItem];
+  CGFloat preferredHeightForStorageSwitch = 0;
+  if (_storageSwitchItem) {
+    preferredHeightForStorageSwitch =
+        [MDCCollectionViewCell cr_preferredHeightForWidth:collectionViewWidth
+                                                  forItem:_storageSwitchItem];
+  }
+  const CGFloat preferredHeightForStatus =
+      [MDCCollectionViewCell cr_preferredHeightForWidth:collectionViewWidth
+                                                forItem:_statusItem];
+  // Return the size of the replaced content, but make sure it is at least the
+  // minimal status cell height.
+  return MAX(preferredHeightForCVC + preferredHeightForStorageSwitch,
+             preferredHeightForStatus);
+}
+
+- (void)layoutTooltipFromButton:(UIButton*)button {
+  const CGRect buttonFrameInCollectionView =
+      [self.collectionView convertRect:button.bounds fromView:button];
+  CGRect tooltipFrame = _storageSwitchTooltip.get().frame;
+
+  // First, set the width and use sizeToFit to have the label flow the text and
+  // set the height appropriately.
+  const CGFloat kTooltipMargin = 8;
+  CGFloat availableWidth =
+      CGRectGetMinX(buttonFrameInCollectionView) - 2 * kTooltipMargin;
+  const CGFloat kMaxTooltipWidth = 210;
+  tooltipFrame.size.width = MIN(availableWidth, kMaxTooltipWidth);
+  _storageSwitchTooltip.get().frame = tooltipFrame;
+  [_storageSwitchTooltip sizeToFit];
+
+  // Then use the size to position the tooltip appropriately, based on the
+  // button position.
+  tooltipFrame = _storageSwitchTooltip.get().frame;
+  tooltipFrame.origin.x = CGRectGetMinX(buttonFrameInCollectionView) -
+                          kTooltipMargin - CGRectGetWidth(tooltipFrame);
+  tooltipFrame.origin.y = CGRectGetMaxY(buttonFrameInCollectionView) -
+                          CGRectGetHeight(tooltipFrame);
+  _storageSwitchTooltip.get().frame = tooltipFrame;
+}
+
+- (BOOL)inputCVCIsValid:(CVCItem*)item {
+  return _bridge->GetController()->InputCvcIsValid(
+      base::SysNSStringToUTF16(item.CVCText));
+}
+
+- (BOOL)inputExpirationIsValid:(CVCItem*)item {
+  if (!item.showDateInput) {
+    return YES;
+  }
+
+  return _bridge->GetController()->InputExpirationIsValid(
+      base::SysNSStringToUTF16(item.monthText),
+      base::SysNSStringToUTF16(item.yearText));
+}
+
+- (void)inputsDidChange:(CVCItem*)item {
+  [_verifyButton setEnabled:[self inputCVCIsValid:item] &&
+                            [self inputExpirationIsValid:item]];
+}
+
+- (void)updateDateErrorState:(CVCItem*)item {
+  // Only change the error state if the inputs are of a length that can be
+  // interpreted as valid or not.
+  NSUInteger monthTextLength = item.monthText.length;
+  if (monthTextLength != 1 && monthTextLength != 2) {
+    return;
+  }
+  NSUInteger yearTextLength = item.yearText.length;
+  if (yearTextLength != 2 && yearTextLength != 4) {
+    return;
+  }
+
+  if ([self inputExpirationIsValid:item]) {
+    item.showDateInputError = NO;
+    item.errorMessage = @"";
+  } else {
+    item.showDateInputError = NO;
+    item.errorMessage = l10n_util::GetNSString(
+        IDS_AUTOFILL_CARD_UNMASK_INVALID_EXPIRATION_DATE);
+  }
+
+  [self reconfigureCellsForItems:@[ item ]
+         inSectionWithIdentifier:SectionIdentifierMain];
+  [self.collectionViewLayout invalidateLayout];
+}
+
+- (void)focusInputIfNeeded:(CVCCell*)CVC {
+  // Focus the first visible input, unless the orientation is landscape. In
+  // landscape, the keyboard covers up the storage checkbox shown below this
+  // view and the user might never see it.
+  if (UIInterfaceOrientationIsPortrait(
+          [UIApplication sharedApplication].statusBarOrientation)) {
+    // Also check whether any of the inputs are already the first responder and
+    // are non-empty, in which case the focus should be left there.
+    if ((!CVC.monthInput.isFirstResponder || CVC.monthInput.text.length == 0) &&
+        (!CVC.yearInput.isFirstResponder || CVC.yearInput.text.length == 0) &&
+        (!CVC.CVCInput.isFirstResponder || CVC.CVCInput.text.length == 0)) {
+      if (_CVCItem.get().showDateInput) {
+        [CVC.monthInput becomeFirstResponder];
+      } else {
+        [CVC.CVCInput becomeFirstResponder];
+      }
+    }
+  }
+}
+
+#pragma mark - Actions
+
+- (void)onVerify:(id)sender {
+  autofill::CardUnmaskPromptController* controller = _bridge->GetController();
+  DCHECK(controller);
+
+  // The controller requires a 4-digit year. Convert if necessary.
+  NSString* yearText = _CVCItem.get().yearText;
+  if (yearText.length == 2) {
+    NSInteger inputYear = yearText.integerValue;
+    NSInteger currentYear =
+        [[NSCalendar currentCalendar] components:NSCalendarUnitYear
+                                        fromDate:[NSDate date]]
+            .year;
+    inputYear += currentYear - (currentYear % 100);
+    yearText = [@(inputYear) stringValue];
+  }
+
+  controller->OnUnmaskResponse(
+      base::SysNSStringToUTF16(_CVCItem.get().CVCText),
+      base::SysNSStringToUTF16(_CVCItem.get().monthText),
+      base::SysNSStringToUTF16(yearText), _storageSwitchItem.get().on);
+}
+
+- (void)onCancel:(id)sender {
+  _bridge->PerformClose();
+}
+
+- (void)onTooltipButtonTapped:(UIButton*)button {
+  BOOL shouldShowTooltip = !button.selected;
+  button.highlighted = shouldShowTooltip;
+  if (shouldShowTooltip) {
+    button.selected = YES;
+    [self layoutTooltipFromButton:button];
+    [_storageSwitchTooltip setHidden:NO];
+  } else {
+    button.selected = NO;
+    [_storageSwitchTooltip setHidden:YES];
+  }
+}
+
+- (void)onStorageSwitchChanged:(UISwitch*)switchView {
+  // Update the item.
+  _storageSwitchItem.get().on = switchView.on;
+}
+
+- (void)onNewCardLinkTapped:(UIButton*)button {
+  _bridge->GetController()->NewCardLinkClicked();
+  _CVCItem.get().instructionsText =
+      SysUTF16ToNSString(_bridge->GetController()->GetInstructionsMessage());
+  _CVCItem.get().monthText = @"";
+  _CVCItem.get().yearText = @"";
+  _CVCItem.get().CVCText = @"";
+  _CVCItem.get().errorMessage = @"";
+  _CVCItem.get().showDateInput = YES;
+  _CVCItem.get().showNewCardButton = NO;
+  _CVCItem.get().showDateInputError = NO;
+  _CVCItem.get().showCVCInputError = NO;
+
+  [self reconfigureCellsForItems:@[ _CVCItem.get() ]
+         inSectionWithIdentifier:SectionIdentifierMain];
+  [self.collectionViewLayout invalidateLayout];
+
+  [self inputsDidChange:_CVCItem];
+}
+
+#pragma mark - UITextField Events
+
+- (void)monthInputDidChange:(UITextField*)textField {
+  _CVCItem.get().monthText = textField.text;
+  [self inputsDidChange:_CVCItem];
+  [self updateDateErrorState:_CVCItem];
+}
+
+- (void)yearInputDidChange:(UITextField*)textField {
+  _CVCItem.get().yearText = textField.text;
+  [self inputsDidChange:_CVCItem];
+  [self updateDateErrorState:_CVCItem];
+}
+
+- (void)CVCInputDidChange:(UITextField*)textField {
+  _CVCItem.get().CVCText = textField.text;
+  [self inputsDidChange:_CVCItem];
+  if (_bridge->GetController()->InputCvcIsValid(
+          base::SysNSStringToUTF16(textField.text))) {
+    _CVCItem.get().showCVCInputError = NO;
+    [self updateDateErrorState:_CVCItem];
+  }
+}
+
+#pragma mark - MDCCollectionViewStylingDelegate
+
+- (CGFloat)collectionView:(UICollectionView*)collectionView
+    cellHeightAtIndexPath:(NSIndexPath*)indexPath {
+  CollectionViewItem* item =
+      [self.collectionViewModel itemAtIndexPath:indexPath];
+  if (item.type == ItemTypeStatus) {
+    return [self statusCellHeight];
+  }
+  return [MDCCollectionViewCell
+      cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds)
+                         forItem:item];
+}
+
+- (BOOL)collectionView:(UICollectionView*)collectionView
+    hidesInkViewAtIndexPath:(NSIndexPath*)indexPath {
+  return YES;
+}
+
+#pragma mark - UICollectionViewDataSource
+
+- (UICollectionViewCell*)collectionView:(UICollectionView*)collectionView
+                 cellForItemAtIndexPath:(NSIndexPath*)indexPath {
+  UICollectionViewCell* cell =
+      [super collectionView:collectionView cellForItemAtIndexPath:indexPath];
+
+  ItemType itemType = static_cast<ItemType>(
+      [self.collectionViewModel itemTypeForIndexPath:indexPath]);
+  switch (itemType) {
+    case ItemTypeCVC: {
+      CVCCell* cellForCVC = base::mac::ObjCCastStrict<CVCCell>(cell);
+      [cellForCVC.monthInput addTarget:self
+                                action:@selector(monthInputDidChange:)
+                      forControlEvents:UIControlEventEditingChanged];
+      [cellForCVC.yearInput addTarget:self
+                               action:@selector(yearInputDidChange:)
+                     forControlEvents:UIControlEventEditingChanged];
+      [cellForCVC.CVCInput addTarget:self
+                              action:@selector(CVCInputDidChange:)
+                    forControlEvents:UIControlEventEditingChanged];
+      [cellForCVC.buttonForNewCard addTarget:self
+                                      action:@selector(onNewCardLinkTapped:)
+                            forControlEvents:UIControlEventTouchUpInside];
+      break;
+    }
+    case ItemTypeStorageSwitch: {
+      StorageSwitchCell* storageSwitchCell =
+          base::mac::ObjCCastStrict<StorageSwitchCell>(cell);
+      [storageSwitchCell.tooltipButton
+                 addTarget:self
+                    action:@selector(onTooltipButtonTapped:)
+          forControlEvents:UIControlEventTouchUpInside];
+      [storageSwitchCell.switchView addTarget:self
+                                       action:@selector(onStorageSwitchChanged:)
+                             forControlEvents:UIControlEventValueChanged];
+      break;
+    }
+    default:
+      break;
+  }
+  return cell;
+}
+
+#pragma mark - UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView*)collectionView
+       willDisplayCell:(UICollectionViewCell*)cell
+    forItemAtIndexPath:(NSIndexPath*)indexPath {
+  CVCCell* CVC = base::mac::ObjCCast<CVCCell>(cell);
+  if (CVC) {
+    [self focusInputIfNeeded:CVC];
+  }
+}
+
+@end