Migrate SearchEngineSettingsCollectionViewController from

CollectionViewController to ChromeTableViewController, and show search
engines' keywords in Settings.

This CL migrates the SearchEngineSettingsCollectionViewController from
CollectionViewController, which is based on MDCCollectionViewController,
to ChromeTableViewController, which is based on UITableViewController.

This CL also enables showing search engines' keywords in Settings for
security considerations.

Bug: 894791, 433824
Change-Id: I0eb6cf7081159d13cf389750f99ca13ee162c9d6
Reviewed-on: https://chromium-review.googlesource.com/c/1344134
Commit-Queue: Yi Su <mrsuyi@chromium.org>
Reviewed-by: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#609781}

ios/chrome/browser/ui/settings/BUILD.gn

@@ -74,8 +74,8 @@ source_set("settings") {
     "reauthentication_protocol.h",
     "save_passwords_collection_view_controller.h",
     "save_passwords_collection_view_controller.mm",
-    "search_engine_settings_collection_view_controller.h",
-    "search_engine_settings_collection_view_controller.mm",
+    "search_engine_table_view_controller.h",
+    "search_engine_table_view_controller.mm",
     "settings_collection_view_controller.h",
     "settings_collection_view_controller.mm",
     "settings_navigation_controller.h",
@@ -285,7 +285,7 @@ source_set("unit_tests") {
     "privacy_table_view_controller_unittest.mm",
     "reauthentication_module_unittest.mm",
     "save_passwords_collection_view_controller_unittest.mm",
-    "search_engine_settings_collection_view_controller_unittest.mm",
+    "search_engine_table_view_controller_unittest.mm",
     "settings_navigation_controller_unittest.mm",
     "settings_root_collection_view_controller_unittest.mm",
     "settings_root_table_view_controller_unittest.mm",

ios/chrome/browser/ui/settings/search_engine_settings_collection_view_controller.h → ios/chrome/browser/ui/settings/search_engine_table_view_controller.h

@@ -2,27 +2,26 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
-#define IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
+#ifndef IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_TABLE_VIEW_CONTROLLER_H_
+#define IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_TABLE_VIEW_CONTROLLER_H_
 
-#import "ios/chrome/browser/ui/settings/settings_root_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/settings_root_table_view_controller.h"
 
 namespace ios {
 class ChromeBrowserState;
 }  // namespace ios
 
 // This class is the table view for the Search Engine settings.
-@interface SearchEngineSettingsCollectionViewController
-    : SettingsRootCollectionViewController
+@interface SearchEngineTableViewController : SettingsRootTableViewController
 
 // The designated initializer. |browserState| must not be nil.
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState
     NS_DESIGNATED_INITIALIZER;
-
-- (instancetype)initWithLayout:(UICollectionViewLayout*)layout
-                         style:(CollectionViewControllerStyle)style
+- (instancetype)initWithTableViewStyle:(UITableViewStyle)style
+                           appBarStyle:
+                               (ChromeTableViewControllerStyle)appBarStyle
     NS_UNAVAILABLE;
 
 @end
 
-#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_SETTINGS_COLLECTION_VIEW_CONTROLLER_H_
+#endif  // IOS_CHROME_BROWSER_UI_SETTINGS_SEARCH_ENGINE_TABLE_VIEW_CONTROLLER_H_

ios/chrome/browser/ui/settings/search_engine_settings_collection_view_controller.mm → ios/chrome/browser/ui/settings/search_engine_table_view_controller.mm

@@ -2,7 +2,7 @@
 // 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/search_engine_settings_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/search_engine_table_view_controller.h"
 
 #include <memory>
 
@@ -14,11 +14,9 @@
 #include "ios/chrome/browser/browser_state/chrome_browser_state.h"
 #import "ios/chrome/browser/search_engines/search_engine_observer_bridge.h"
 #include "ios/chrome/browser/search_engines/template_url_service_factory.h"
-#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
-#import "ios/chrome/browser/ui/settings/cells/settings_text_item.h"
+#import "ios/chrome/browser/ui/table_view/cells/table_view_detail_text_item.h"
+#import "ios/chrome/browser/ui/table_view/cells/table_view_text_header_footer_item.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_mac.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -45,11 +43,10 @@ const char kUmaSelectDefaultSearchEngine[] =
 
 }  // namespace
 
-@interface SearchEngineSettingsCollectionViewController ()<
-    SearchEngineObserving>
+@interface SearchEngineTableViewController ()<SearchEngineObserving>
 @end
 
-@implementation SearchEngineSettingsCollectionViewController {
+@implementation SearchEngineTableViewController {
   TemplateURLService* _templateURLService;  // weak
   std::unique_ptr<SearchEngineObserverBridge> _observer;
   // Prevent unnecessary notifications when we write to the setting.
@@ -67,9 +64,9 @@ const char kUmaSelectDefaultSearchEngine[] =
 
 - (instancetype)initWithBrowserState:(ios::ChromeBrowserState*)browserState {
   DCHECK(browserState);
-  UICollectionViewLayout* layout = [[MDCCollectionViewFlowLayout alloc] init];
   self =
-      [super initWithLayout:layout style:CollectionViewControllerStyleAppBar];
+      [super initWithTableViewStyle:UITableViewStyleGrouped
+                        appBarStyle:ChromeTableViewControllerStyleWithAppBar];
   if (self) {
     _templateURLService =
         ios::TemplateURLServiceFactory::GetForBrowserState(browserState);
@@ -77,17 +74,23 @@ const char kUmaSelectDefaultSearchEngine[] =
         std::make_unique<SearchEngineObserverBridge>(self, _templateURLService);
     _templateURLService->Load();
     [self setTitle:l10n_util::GetNSString(IDS_IOS_SEARCH_ENGINE_SETTING_TITLE)];
-    [self setCollectionViewAccessibilityIdentifier:@"Search Engine"];
-    // TODO(crbug.com/764578): -loadModel should not be called from
-    // initializer. A possible fix is to move this call to -viewDidLoad.
-    [self loadModel];
   }
   return self;
 }
 
+#pragma mark - UIViewController
+
+- (void)viewDidLoad {
+  [super viewDidLoad];
+
+  [self loadModel];
+}
+
+#pragma mark - ChromeTableViewController
+
 - (void)loadModel {
   [super loadModel];
-  CollectionViewModel* model = self.collectionViewModel;
+  TableViewModel* model = self.tableViewModel;
   [self loadSearchEngines];
 
   // Add prior search engines.
@@ -95,11 +98,12 @@ const char kUmaSelectDefaultSearchEngine[] =
     [model addSectionWithIdentifier:SectionIdentifierPriorSearchEngines];
 
     for (TemplateURL* url : _priorSearchEngines) {
-      SettingsTextItem* engine = [[SettingsTextItem alloc]
+      TableViewDetailTextItem* engine = [[TableViewDetailTextItem alloc]
           initWithType:ItemTypePriorSearchEnginesEngine];
-      [engine setText:base::SysUTF16ToNSString(url->short_name())];
+      engine.text = base::SysUTF16ToNSString(url->short_name());
+      engine.detailText = base::SysUTF16ToNSString(url->keyword());
       if (url == _templateURLService->GetDefaultSearchProvider()) {
-        [engine setAccessoryType:MDCCollectionViewCellAccessoryCheckmark];
+        [engine setAccessoryType:UITableViewCellAccessoryCheckmark];
       }
       [model addItem:engine
           toSectionWithIdentifier:SectionIdentifierPriorSearchEngines];
@@ -110,20 +114,21 @@ const char kUmaSelectDefaultSearchEngine[] =
   if (_customSearchEngines.size() > 0) {
     [model addSectionWithIdentifier:SectionIdentifierCustomSearchEngines];
 
-    SettingsTextItem* header = [[SettingsTextItem alloc]
-        initWithType:ItemTypeCustomSearchEnginesEngineHeader];
+    TableViewTextHeaderFooterItem* header =
+        [[TableViewTextHeaderFooterItem alloc]
+            initWithType:ItemTypeCustomSearchEnginesEngineHeader];
     header.text = l10n_util::GetNSString(
         IDS_IOS_SEARCH_ENGINE_SETTING_CUSTOM_SECTION_HEADER);
-    header.textColor = [[MDCPalette greyPalette] tint500];
     [model setHeader:header
         forSectionWithIdentifier:SectionIdentifierCustomSearchEngines];
 
     for (TemplateURL* url : _customSearchEngines) {
-      SettingsTextItem* engine = [[SettingsTextItem alloc]
+      TableViewDetailTextItem* engine = [[TableViewDetailTextItem alloc]
           initWithType:ItemTypeCustomSearchEnginesEngine];
-      [engine setText:base::SysUTF16ToNSString(url->short_name())];
+      engine.text = base::SysUTF16ToNSString(url->short_name());
+      engine.detailText = base::SysUTF16ToNSString(url->keyword());
       if (url == _templateURLService->GetDefaultSearchProvider()) {
-        [engine setAccessoryType:MDCCollectionViewCellAccessoryCheckmark];
+        [engine setAccessoryType:UITableViewCellAccessoryCheckmark];
       }
       [model addItem:engine
           toSectionWithIdentifier:SectionIdentifierCustomSearchEngines];
@@ -131,25 +136,24 @@ const char kUmaSelectDefaultSearchEngine[] =
   }
 }
 
-#pragma mark UICollectionViewDelegate
+#pragma mark UITableViewDelegate
 
-- (void)collectionView:(UICollectionView*)collectionView
-    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
-  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
-  CollectionViewModel* model = self.collectionViewModel;
+- (void)tableView:(UITableView*)tableView
+    didSelectRowAtIndexPath:(NSIndexPath*)indexPath {
+  [super tableView:tableView didSelectRowAtIndexPath:indexPath];
+  TableViewModel* model = self.tableViewModel;
 
   // Only handle taps on search engine items.
-  CollectionViewItem* selectedItem = [model itemAtIndexPath:indexPath];
+  TableViewItem* selectedItem = [model itemAtIndexPath:indexPath];
   if (selectedItem.type != ItemTypePriorSearchEnginesEngine &&
       selectedItem.type != ItemTypeCustomSearchEnginesEngine) {
     return;
   }
 
   // Do nothing if the tapped engine was already the default.
-  SettingsTextItem* selectedTextItem =
-      base::mac::ObjCCastStrict<SettingsTextItem>(selectedItem);
-  if (selectedTextItem.accessoryType ==
-      MDCCollectionViewCellAccessoryCheckmark) {
+  TableViewDetailTextItem* selectedTextItem =
+      base::mac::ObjCCastStrict<TableViewDetailTextItem>(selectedItem);
+  if (selectedTextItem.accessoryType == UITableViewCellAccessoryCheckmark) {
     return;
   }
 
@@ -158,42 +162,42 @@ const char kUmaSelectDefaultSearchEngine[] =
   // Iterate through the engines and remove the checkmark from any that have it.
   if ([model
           hasSectionForSectionIdentifier:SectionIdentifierPriorSearchEngines]) {
-    for (CollectionViewItem* item in
+    for (TableViewItem* item in
          [model itemsInSectionWithIdentifier:
                     SectionIdentifierPriorSearchEngines]) {
       if (item.type != ItemTypePriorSearchEnginesEngine) {
         continue;
       }
-      SettingsTextItem* textItem =
-          base::mac::ObjCCastStrict<SettingsTextItem>(item);
-      if (textItem.accessoryType == MDCCollectionViewCellAccessoryCheckmark) {
-        textItem.accessoryType = MDCCollectionViewCellAccessoryNone;
+      TableViewDetailTextItem* textItem =
+          base::mac::ObjCCastStrict<TableViewDetailTextItem>(item);
+      if (textItem.accessoryType == UITableViewCellAccessoryCheckmark) {
+        textItem.accessoryType = UITableViewCellAccessoryNone;
         [modifiedItems addObject:textItem];
       }
     }
   }
   if ([model hasSectionForSectionIdentifier:
                  SectionIdentifierCustomSearchEngines]) {
-    for (CollectionViewItem* item in
+    for (TableViewItem* item in
          [model itemsInSectionWithIdentifier:
                     SectionIdentifierCustomSearchEngines]) {
       if (item.type != ItemTypeCustomSearchEnginesEngine) {
         continue;
       }
-      SettingsTextItem* textItem =
-          base::mac::ObjCCastStrict<SettingsTextItem>(item);
-      if (textItem.accessoryType == MDCCollectionViewCellAccessoryCheckmark) {
-        textItem.accessoryType = MDCCollectionViewCellAccessoryNone;
+      TableViewDetailTextItem* textItem =
+          base::mac::ObjCCastStrict<TableViewDetailTextItem>(item);
+      if (textItem.accessoryType == UITableViewCellAccessoryCheckmark) {
+        textItem.accessoryType = UITableViewCellAccessoryNone;
         [modifiedItems addObject:textItem];
       }
     }
   }
 
   // Show the checkmark on the new default engine.
-  SettingsTextItem* newDefaultEngine =
-      base::mac::ObjCCastStrict<SettingsTextItem>(
+  TableViewDetailTextItem* newDefaultEngine =
+      base::mac::ObjCCastStrict<TableViewDetailTextItem>(
           [model itemAtIndexPath:indexPath]);
-  newDefaultEngine.accessoryType = MDCCollectionViewCellAccessoryCheckmark;
+  newDefaultEngine.accessoryType = UITableViewCellAccessoryCheckmark;
   [modifiedItems addObject:newDefaultEngine];
 
   // Set the new engine as the default.
@@ -205,6 +209,7 @@ const char kUmaSelectDefaultSearchEngine[] =
               [model indexInItemTypeForIndexPath:indexPath]];
 
   [self reconfigureCellsForItems:modifiedItems];
+  [tableView deselectRowAtIndexPath:indexPath animated:YES];
 }
 
 #pragma mark Internal methods

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

@@ -56,7 +56,7 @@
 #import "ios/chrome/browser/ui/settings/material_cell_catalog_view_controller.h"
 #import "ios/chrome/browser/ui/settings/privacy_table_view_controller.h"
 #import "ios/chrome/browser/ui/settings/save_passwords_collection_view_controller.h"
-#import "ios/chrome/browser/ui/settings/search_engine_settings_collection_view_controller.h"
+#import "ios/chrome/browser/ui/settings/search_engine_table_view_controller.h"
 #import "ios/chrome/browser/ui/settings/sync_utils/sync_util.h"
 #import "ios/chrome/browser/ui/settings/table_cell_catalog_view_controller.h"
 #import "ios/chrome/browser/ui/settings/utils/pref_backed_boolean.h"
@@ -855,7 +855,7 @@ void IdentityObserverBridge::OnPrimaryAccountCleared(
       [self showSyncGoogleService];
       break;
     case ItemTypeSearchEngine:
-      controller = [[SearchEngineSettingsCollectionViewController alloc]
+      controller = [[SearchEngineTableViewController alloc]
           initWithBrowserState:_browserState];
       break;
     case ItemTypeSavedPasswords:

ios/chrome/browser/ui/settings/settings_root_table_view_controller.h

@@ -29,6 +29,10 @@
 // using shouldHideDoneButton to know if it should display the edit button.
 - (void)updateEditButton;
 
+// Reloads the table view model with |loadModel| and then reloads the
+// table view data.
+- (void)reloadData;
+
 @end
 
 // Subclasses of SettingsRootTableViewController should implement the

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

@@ -47,6 +47,11 @@
   }
 }
 
+- (void)reloadData {
+  [self loadModel];
+  [self.tableView reloadData];
+}
+
 #pragma mark - Property
 
 - (UIBarButtonItem*)deleteButton {