Upstream Chrome on iOS source code [7/11].

ios/chrome/browser/ui/settings/import_data_collection_view_controller.mm

+// 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.
+
+#import "ios/chrome/browser/ui/settings/import_data_collection_view_controller.h"
+
+#import "base/ios/weak_nsobject.h"
+#include "base/logging.h"
+#import "base/mac/foundation_util.h"
+#import "base/mac/scoped_nsobject.h"
+#include "base/strings/sys_string_conversions.h"
+#import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/settings/cells/card_multiline_item.h"
+#import "ios/chrome/browser/ui/settings/cells/import_data_multiline_detail_cell.h"
+#include "ios/chrome/grit/ios_strings.h"
+#import "ios/third_party/material_components_ios/src/components/CollectionCells/src/MaterialCollectionCells.h"
+#import "ios/third_party/material_components_ios/src/components/Collections/src/MaterialCollections.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+// The accessibility identifier of the Import Data cell.
+NSString* const kImportDataImportCellId = @"kImportDataImportCellId";
+// The accessibility identifier of the Keep Data Separate cell.
+NSString* const kImportDataKeepSeparateCellId =
+    @"kImportDataKeepSeparateCellId";
+
+namespace {
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierDisclaimer = kSectionIdentifierEnumZero,
+  SectionIdentifierOptions,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeFooter = kItemTypeEnumZero,
+  ItemTypeOptionImportData,
+  ItemTypeOptionKeepDataSeparate,
+};
+
+}  // namespace
+
+@implementation ImportDataCollectionViewController {
+  base::WeakNSProtocol<id<ImportDataControllerDelegate>> _delegate;
+  base::scoped_nsobject<NSString> _fromEmail;
+  base::scoped_nsobject<NSString> _toEmail;
+  BOOL _isSignedIn;
+  ShouldClearData _shouldClearData;
+  base::scoped_nsobject<CollectionViewDetailItem> _importDataItem;
+  base::scoped_nsobject<CollectionViewDetailItem> _keepDataSeparateItem;
+}
+
+#pragma mark Initialization
+
+- (instancetype)initWithDelegate:(id<ImportDataControllerDelegate>)delegate
+                       fromEmail:(NSString*)fromEmail
+                         toEmail:(NSString*)toEmail
+                      isSignedIn:(BOOL)isSignedIn {
+  DCHECK(fromEmail);
+  DCHECK(toEmail);
+  self = [super initWithStyle:CollectionViewControllerStyleAppBar];
+  if (self) {
+    _delegate.reset(delegate);
+    _fromEmail.reset([fromEmail copy]);
+    _toEmail.reset([toEmail copy]);
+    _isSignedIn = isSignedIn;
+    _shouldClearData = isSignedIn ? SHOULD_CLEAR_DATA_CLEAR_DATA
+                                  : SHOULD_CLEAR_DATA_MERGE_DATA;
+    self.title = l10n_util::GetNSString(IDS_IOS_OPTIONS_IMPORT_DATA_TITLE);
+    [self setShouldHideDoneButton:YES];
+    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc]
+        initWithTitle:l10n_util::GetNSString(
+                          IDS_IOS_OPTIONS_IMPORT_DATA_CONTINUE_BUTTON)
+                style:UIBarButtonItemStyleDone
+               target:self
+               action:@selector(didTapContinue)] autorelease];
+    [self loadModel];
+  }
+  return self;
+}
+
+#pragma mark SettingsRootCollectionViewController
+
+- (void)loadModel {
+  [super loadModel];
+  CollectionViewModel* model = self.collectionViewModel;
+
+  [model addSectionWithIdentifier:SectionIdentifierDisclaimer];
+  [model addItem:[self descriptionItem]
+      toSectionWithIdentifier:SectionIdentifierDisclaimer];
+
+  [model addSectionWithIdentifier:SectionIdentifierOptions];
+  _importDataItem.reset([[self importDataItem] retain]);
+  [model addItem:_importDataItem
+      toSectionWithIdentifier:SectionIdentifierOptions];
+  _keepDataSeparateItem.reset([[self keepDataSeparateItem] retain]);
+  [model addItem:_keepDataSeparateItem
+      toSectionWithIdentifier:SectionIdentifierOptions];
+}
+
+#pragma mark Items
+
+- (CollectionViewItem*)descriptionItem {
+  CardMultilineItem* item =
+      [[[CardMultilineItem alloc] initWithType:ItemTypeFooter] autorelease];
+  item.text = l10n_util::GetNSStringF(IDS_IOS_OPTIONS_IMPORT_DATA_HEADER,
+                                      base::SysNSStringToUTF16(_fromEmail));
+  return item;
+}
+
+- (CollectionViewDetailItem*)importDataItem {
+  CollectionViewDetailItem* item = [[[CollectionViewDetailItem alloc]
+      initWithType:ItemTypeOptionImportData] autorelease];
+  item.cellClass = [ImportDataMultilineDetailCell class];
+  item.text = l10n_util::GetNSString(IDS_IOS_OPTIONS_IMPORT_DATA_IMPORT_TITLE);
+  item.detailText =
+      l10n_util::GetNSStringF(IDS_IOS_OPTIONS_IMPORT_DATA_IMPORT_SUBTITLE,
+                              base::SysNSStringToUTF16(_toEmail));
+  item.accessoryType = _isSignedIn ? MDCCollectionViewCellAccessoryNone
+                                   : MDCCollectionViewCellAccessoryCheckmark;
+  item.accessibilityIdentifier = kImportDataImportCellId;
+  return item;
+}
+
+- (CollectionViewDetailItem*)keepDataSeparateItem {
+  CollectionViewDetailItem* item = [[[CollectionViewDetailItem alloc]
+      initWithType:ItemTypeOptionKeepDataSeparate] autorelease];
+  item.cellClass = [ImportDataMultilineDetailCell class];
+  item.text = l10n_util::GetNSString(IDS_IOS_OPTIONS_IMPORT_DATA_KEEP_TITLE);
+  if (_isSignedIn) {
+    item.detailText = l10n_util::GetNSStringF(
+        IDS_IOS_OPTIONS_IMPORT_DATA_KEEP_SUBTITLE_SWITCH,
+        base::SysNSStringToUTF16(_fromEmail));
+  } else {
+    item.detailText = l10n_util::GetNSString(
+        IDS_IOS_OPTIONS_IMPORT_DATA_KEEP_SUBTITLE_SIGNIN);
+  }
+  item.accessoryType = _isSignedIn ? MDCCollectionViewCellAccessoryCheckmark
+                                   : MDCCollectionViewCellAccessoryNone;
+  item.accessibilityIdentifier = kImportDataKeepSeparateCellId;
+  return item;
+}
+
+#pragma mark MDCCollectionViewStylingDelegate
+
+- (CGFloat)collectionView:(UICollectionView*)collectionView
+    cellHeightAtIndexPath:(NSIndexPath*)indexPath {
+  CollectionViewItem* item =
+      [self.collectionViewModel itemAtIndexPath:indexPath];
+  CGFloat cardWidth = CGRectGetWidth(collectionView.bounds) -
+                      2 * MDCCollectionViewCellStyleCardSectionInset;
+  return
+      [MDCCollectionViewCell cr_preferredHeightForWidth:cardWidth forItem:item];
+}
+
+#pragma mark UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView*)collectionView
+    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
+  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
+  NSInteger sectionIdentifier =
+      [self.collectionViewModel sectionIdentifierForSection:indexPath.section];
+
+  if (sectionIdentifier == SectionIdentifierOptions) {
+    // Store the user choice.
+    NSInteger itemType =
+        [self.collectionViewModel itemTypeForIndexPath:indexPath];
+    _shouldClearData = (itemType == ItemTypeOptionImportData)
+                           ? SHOULD_CLEAR_DATA_MERGE_DATA
+                           : SHOULD_CLEAR_DATA_CLEAR_DATA;
+    [self updateUI];
+  }
+}
+
+#pragma mark Private methods
+
+// Updates the UI based on the value of |_shouldClearData|.
+- (void)updateUI {
+  BOOL importDataSelected = _shouldClearData == SHOULD_CLEAR_DATA_MERGE_DATA;
+  _importDataItem.get().accessoryType =
+      importDataSelected ? MDCCollectionViewCellAccessoryCheckmark
+                         : MDCCollectionViewCellAccessoryNone;
+  _keepDataSeparateItem.get().accessoryType =
+      importDataSelected ? MDCCollectionViewCellAccessoryNone
+                         : MDCCollectionViewCellAccessoryCheckmark;
+  [self reconfigureCellsForItems:@[ _importDataItem, _keepDataSeparateItem ]
+         inSectionWithIdentifier:SectionIdentifierOptions];
+}
+
+- (void)didTapContinue {
+  [_delegate didChooseClearDataPolicy:self shouldClearData:_shouldClearData];
+}
+
+@end