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

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

+// Copyright 2013 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/content_settings_collection_view_controller.h"
+
+#include "base/logging.h"
+#include "base/mac/scoped_nsobject.h"
+#include "components/content_settings/core/browser/host_content_settings_map.h"
+#include "components/content_settings/core/common/content_settings.h"
+#include "components/content_settings/core/common/content_settings_types.h"
+#include "components/prefs/pref_change_registrar.h"
+#include "components/prefs/pref_service.h"
+#include "components/strings/grit/components_strings.h"
+#include "components/translate/core/common/translate_pref_names.h"
+#include "ios/chrome/browser/browser_state/chrome_browser_state.h"
+#include "ios/chrome/browser/content_settings/host_content_settings_map_factory.h"
+#import "ios/chrome/browser/prefs/pref_observer_bridge.h"
+#import "ios/chrome/browser/ui/collection_view/cells/collection_view_detail_item.h"
+#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
+#import "ios/chrome/browser/ui/settings/block_popups_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/settings_navigation_controller.h"
+#import "ios/chrome/browser/ui/settings/translate_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/utils/content_setting_backed_boolean.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/Palettes/src/MaterialPalettes.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/l10n/l10n_util_mac.h"
+
+namespace {
+
+typedef NS_ENUM(NSInteger, SectionIdentifier) {
+  SectionIdentifierSettings = kSectionIdentifierEnumZero,
+};
+
+typedef NS_ENUM(NSInteger, ItemType) {
+  ItemTypeSettingsBlockPopups = kItemTypeEnumZero,
+  ItemTypeSettingsTranslate,
+};
+
+}  // namespace
+
+@interface ContentSettingsCollectionViewController ()<PrefObserverDelegate,
+                                                      BooleanObserver> {
+  // Pref observer to track changes to prefs.
+  std::unique_ptr<PrefObserverBridge> _prefObserverBridge;
+  // Registrar for pref changes notifications.
+  PrefChangeRegistrar _prefChangeRegistrar;
+
+  // The observable boolean that binds to the "Disable Popups" setting state.
+  base::scoped_nsobject<ContentSettingBackedBoolean> _disablePopupsSetting;
+
+  // Updatable Items
+  base::scoped_nsobject<CollectionViewDetailItem> _blockPopupsDetailItem;
+  base::scoped_nsobject<CollectionViewDetailItem> _translateDetailItem;
+}
+
+// Returns the value for the default setting with ID |settingID|.
+- (ContentSetting)getContentSetting:(ContentSettingsType)settingID;
+
+// Helpers to create collection view items.
+- (id)blockPopupsItem;
+- (id)translateItem;
+
+@end
+
+@implementation ContentSettingsCollectionViewController {
+  ios::ChromeBrowserState* browserState_;  // weak
+}
+
+- (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState {
+  DCHECK(browserState);
+  self = [super initWithStyle:CollectionViewControllerStyleAppBar];
+  if (self) {
+    browserState_ = browserState;
+    self.title = l10n_util::GetNSString(IDS_IOS_CONTENT_SETTINGS_TITLE);
+
+    _prefChangeRegistrar.Init(browserState->GetPrefs());
+    _prefObserverBridge.reset(new PrefObserverBridge(self));
+    // Register to observe any changes on Perf backed values displayed by the
+    // screen.
+    _prefObserverBridge->ObserveChangesForPreference(prefs::kEnableTranslate,
+                                                     &_prefChangeRegistrar);
+
+    HostContentSettingsMap* settingsMap =
+        ios::HostContentSettingsMapFactory::GetForBrowserState(browserState);
+    _disablePopupsSetting.reset([[ContentSettingBackedBoolean alloc]
+        initWithHostContentSettingsMap:settingsMap
+                             settingID:CONTENT_SETTINGS_TYPE_POPUPS
+                              inverted:YES]);
+    [_disablePopupsSetting setObserver:self];
+
+    [self loadModel];
+  }
+  return self;
+}
+
+- (void)dealloc {
+  [_disablePopupsSetting setObserver:nil];
+  [super dealloc];
+}
+
+- (instancetype)init {
+  NOTREACHED();
+  return nil;
+}
+
+- (void)loadModel {
+  [super loadModel];
+
+  CollectionViewModel* model = self.collectionViewModel;
+  [model addSectionWithIdentifier:SectionIdentifierSettings];
+  [model addItem:[self blockPopupsItem]
+      toSectionWithIdentifier:SectionIdentifierSettings];
+  [model addItem:[self translateItem]
+      toSectionWithIdentifier:SectionIdentifierSettings];
+}
+
+- (CollectionViewItem*)blockPopupsItem {
+  _blockPopupsDetailItem.reset([[CollectionViewDetailItem alloc]
+      initWithType:ItemTypeSettingsBlockPopups]);
+  NSString* subtitle = [_disablePopupsSetting value]
+                           ? l10n_util::GetNSString(IDS_IOS_SETTING_ON)
+                           : l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
+  _blockPopupsDetailItem.get().text =
+      l10n_util::GetNSString(IDS_IOS_BLOCK_POPUPS);
+  _blockPopupsDetailItem.get().detailText = subtitle;
+  _blockPopupsDetailItem.get().accessoryType =
+      MDCCollectionViewCellAccessoryDisclosureIndicator;
+  _blockPopupsDetailItem.get().accessibilityTraits |=
+      UIAccessibilityTraitButton;
+  return _blockPopupsDetailItem;
+}
+
+- (CollectionViewItem*)translateItem {
+  _translateDetailItem.reset([[CollectionViewDetailItem alloc]
+      initWithType:ItemTypeSettingsTranslate]);
+  BOOL enabled = browserState_->GetPrefs()->GetBoolean(prefs::kEnableTranslate);
+  NSString* subtitle = enabled ? l10n_util::GetNSString(IDS_IOS_SETTING_ON)
+                               : l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
+  _translateDetailItem.get().text =
+      l10n_util::GetNSString(IDS_IOS_TRANSLATE_SETTING);
+  _translateDetailItem.get().detailText = subtitle;
+  _translateDetailItem.get().accessoryType =
+      MDCCollectionViewCellAccessoryDisclosureIndicator;
+  _translateDetailItem.get().accessibilityTraits |= UIAccessibilityTraitButton;
+  return _translateDetailItem;
+}
+
+- (ContentSetting)getContentSetting:(ContentSettingsType)settingID {
+  return ios::HostContentSettingsMapFactory::GetForBrowserState(browserState_)
+      ->GetDefaultContentSetting(settingID, NULL);
+}
+
+#pragma mark - UICollectionViewDelegate
+
+- (void)collectionView:(UICollectionView*)collectionView
+    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
+  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
+
+  NSInteger itemType =
+      [self.collectionViewModel itemTypeForIndexPath:indexPath];
+  switch (itemType) {
+    case ItemTypeSettingsBlockPopups: {
+      base::scoped_nsobject<UIViewController> controller(
+          [[BlockPopupsCollectionViewController alloc]
+              initWithBrowserState:browserState_]);
+      [self.navigationController pushViewController:controller animated:YES];
+      break;
+    }
+    case ItemTypeSettingsTranslate: {
+      base::scoped_nsobject<UIViewController> controller(
+          [[TranslateCollectionViewController alloc]
+              initWithPrefs:browserState_->GetPrefs()]);
+      [self.navigationController pushViewController:controller animated:YES];
+      break;
+    }
+  }
+}
+
+#pragma mark - PrefObserverDelegate
+
+- (void)onPreferenceChanged:(const std::string&)preferenceName {
+  if (preferenceName == prefs::kEnableTranslate) {
+    BOOL enabled = browserState_->GetPrefs()->GetBoolean(preferenceName);
+    NSString* subtitle = enabled ? l10n_util::GetNSString(IDS_IOS_SETTING_ON)
+                                 : l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
+    _translateDetailItem.get().detailText = subtitle;
+    [self reconfigureCellsForItems:@[ _translateDetailItem ]
+           inSectionWithIdentifier:SectionIdentifierSettings];
+  }
+}
+
+#pragma mark - BooleanObserver
+
+- (void)booleanDidChange:(id<ObservableBoolean>)observableBoolean {
+  DCHECK_EQ(observableBoolean, _disablePopupsSetting.get());
+
+  NSString* subtitle = [_disablePopupsSetting value]
+                           ? l10n_util::GetNSString(IDS_IOS_SETTING_ON)
+                           : l10n_util::GetNSString(IDS_IOS_SETTING_OFF);
+  // Update the item.
+  _blockPopupsDetailItem.get().detailText = subtitle;
+
+  // Update the cell.
+  [self reconfigureCellsForItems:@[ _blockPopupsDetailItem ]
+         inSectionWithIdentifier:SectionIdentifierSettings];
+}
+
+@end