[iOS][AF] Create FormInputAccessoryMediator

This CL moves all the logic from the FormInputAccessoryViewController
that is not directly related to managing its view to a new mediator.
Creates a consumer for the communication the the view controller.
Updates tests to use this mediator instead.
Removes the dependency on the CRWWebViewProxy.

Cq-Include-Trybots: luci.chromium.try:ios-simulator-full-configs;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: I1b0f6c595f069ea45e04c9dacdc4437dbfe9041a
Bug: 661622, 727716, 845472, 847408
Reviewed-on: https://chromium-review.googlesource.com/1130522Reviewed-by: Moe Ahmadi <mahmadi@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: Javier Ernesto Flores Robles <javierrobles@chromium.org>
Cr-Commit-Position: refs/heads/master@{#582056}

ios/chrome/browser/autofill/BUILD.gn

@@ -7,11 +7,15 @@ source_set("autofill") {
   sources = [
     "address_normalizer_factory.cc",
     "address_normalizer_factory.h",
+    "form_input_accessory_consumer.h",
     "form_input_accessory_view.h",
     "form_input_accessory_view.mm",
     "form_input_accessory_view_controller.h",
     "form_input_accessory_view_controller.mm",
     "form_input_accessory_view_delegate.h",
+    "form_input_accessory_view_handler.h",
+    "form_input_accessory_view_handler.mm",
+    "form_input_accessory_view_provider.h",
     "form_suggestion_controller.h",
     "form_suggestion_controller.mm",
     "form_suggestion_label.h",
@@ -48,7 +52,6 @@ source_set("autofill") {
     "//base:i18n",
     "//components/autofill/core/browser",
     "//components/autofill/ios/browser",
-    "//components/autofill/ios/form_util",
     "//components/keyed_service/core",
     "//components/keyed_service/ios",
     "//components/prefs",
@@ -474,6 +477,7 @@ source_set("eg_tests") {
     ":autofill",
     "//base",
     "//base/test:test_support",
+    "//components/autofill/ios/browser:browser",
     "//ios/chrome/app/strings",
     "//ios/chrome/browser/ui",
     "//ios/chrome/test/app:test_support",

ios/chrome/browser/autofill/autofill_controller_unittest.mm

@@ -9,6 +9,7 @@
 
 #include "base/guid.h"
 #include "base/ios/ios_util.h"
+#include "base/mac/foundation_util.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/task/task_scheduler/task_scheduler.h"
@@ -19,17 +20,18 @@
 #import "components/autofill/ios/browser/autofill_agent.h"
 #include "components/autofill/ios/browser/autofill_driver_ios.h"
 #import "components/autofill/ios/browser/form_suggestion.h"
+#import "components/autofill/ios/browser/js_suggestion_manager.h"
 #include "components/infobars/core/confirm_infobar_delegate.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_manager.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/security_state/ios/ssl_status_input_event_data.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
 #import "ios/chrome/browser/autofill/form_suggestion_controller.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #include "ios/chrome/browser/infobars/infobar_manager_impl.h"
 #include "ios/chrome/browser/ssl/ios_security_state_tab_helper.h"
 #import "ios/chrome/browser/ui/autofill/chrome_autofill_client_ios.h"
+#import "ios/chrome/browser/ui/autofill/form_input_accessory_mediator.h"
 #include "ios/chrome/browser/ui/settings/personal_data_manager_data_changed_observer.h"
 #include "ios/chrome/browser/web/chrome_web_client.h"
 #import "ios/chrome/browser/web/chrome_web_test.h"
@@ -37,6 +39,7 @@
 #import "ios/web/public/navigation_item.h"
 #import "ios/web/public/navigation_manager.h"
 #include "ios/web/public/ssl_status.h"
+#import "ios/web/public/web_state/js/crw_js_injection_receiver.h"
 #import "ios/web/public/web_state/web_state.h"
 #import "testing/gtest_mac.h"
 #include "ui/base/test/ios/ui_view_test_utils.h"
@@ -192,7 +195,7 @@ class AutofillControllerTest : public ChromeWebTest {
   TestSuggestionController* suggestion_controller_;
 
   // Retrieves accessory views according to form events.
-  FormInputAccessoryViewController* accessory_controller_;
+  FormInputAccessoryMediator* accessory_mediator_;
 
   // Manages autofill for a single page.
   AutofillController* autofill_controller_;
@@ -222,9 +225,17 @@ void AutofillControllerTest::SetUp() {
   suggestion_controller_ = [[TestSuggestionController alloc]
       initWithWebState:web_state()
              providers:@[ [autofill_controller_ suggestionProvider] ]];
-  accessory_controller_ = [[FormInputAccessoryViewController alloc]
-      initWithWebState:web_state()
-             providers:@[ [suggestion_controller_ accessoryViewProvider] ]];
+  accessory_mediator_ =
+      [[FormInputAccessoryMediator alloc] initWithConsumer:nil
+                                              webStateList:NULL];
+  [accessory_mediator_ injectWebState:web_state()];
+  [accessory_mediator_
+      injectProviders:@[ [suggestion_controller_ accessoryViewProvider] ]];
+  auto suggestionManager = base::mac::ObjCCastStrict<JsSuggestionManager>(
+      [web_state()->GetJSInjectionReceiver()
+          instanceOfClass:[JsSuggestionManager class]]);
+  [accessory_mediator_ injectSuggestionManager:suggestionManager];
+
   histogram_tester_.reset(new base::HistogramTester());
 }
 

ios/chrome/browser/autofill/form_input_accessory_consumer.h

+// Copyright 2018 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.
+
+#ifndef IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_CONSUMER_H_
+#define IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_CONSUMER_H_
+
+#import <UIKit/UIKit.h>
+
+@protocol FormInputAccessoryViewDelegate;
+
+@protocol FormInputAccessoryConsumer<NSObject>
+
+// Restores the default input accessory view, removing (if necessary) any
+// previously-added custom view.
+- (void)restoreDefaultInputAccessoryView;
+
+// Hides the default input accessory view and replaces it with one that shows
+// |customView| and form navigation controls.
+- (void)showCustomInputAccessoryView:(UIView*)view
+                  navigationDelegate:
+                      (id<FormInputAccessoryViewDelegate>)navigationDelegate;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_CONSUMER_H_

ios/chrome/browser/autofill/form_input_accessory_view_controller.h

@@ -7,16 +7,9 @@
 
 #import <UIKit/UIKit.h>
 
-#import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
-#import "ios/web/public/web_state/web_state_observer_bridge.h"
-
-@protocol CRWWebViewProxy;
-@protocol FormInputAccessoryViewProvider;
+#import "ios/chrome/browser/autofill/form_input_accessory_consumer.h"
 
 namespace autofill {
-extern NSString* const kFormSuggestionAssistButtonPreviousElement;
-extern NSString* const kFormSuggestionAssistButtonNextElement;
-extern NSString* const kFormSuggestionAssistButtonDone;
 extern CGFloat const kInputAccessoryHeight;
 }  // namespace autofill
 
@@ -24,33 +17,7 @@ extern CGFloat const kInputAccessoryHeight;
 // interacting with a form. Also handles hiding and showing the default
 // accessory view elements.
 @interface FormInputAccessoryViewController
-    : NSObject<CRWWebStateObserver, FormInputAccessoryViewDelegate>
-
-// The current web view proxy.
-// TODO(crbug.com/727716): This property should not be a part of the public
-// interface, it is used in tests as a backdoor.
-@property(nonatomic, readonly) id<CRWWebViewProxy> webViewProxy;
-
-// The current web state that this view controller is observing.
-@property(nonatomic) web::WebState* webState;
-
-// Initializes a new controller with the specified |providers| of input
-// accessory views.
-- (instancetype)initWithWebState:(web::WebState*)webState
-                       providers:(NSArray<id<FormInputAccessoryViewProvider>>*)
-                                     providers;
-
-// Instructs the controller to detach itself from the WebState.
-- (void)detachFromWebState;
-
-// Hides the default input accessory view and replaces it with one that shows
-// |customView| and form navigation controls.
-- (void)showCustomInputAccessoryView:(UIView*)customView;
-
-// Restores the default input accessory view, removing (if necessary) any
-// previously-added custom view.
-- (void)restoreDefaultInputAccessoryView;
-
+    : NSObject<FormInputAccessoryConsumer>
 @end
 
 #endif  // IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_CONTROLLER_H_

ios/chrome/browser/autofill/form_input_accessory_view_handler.h

+// Copyright 2018 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.
+
+#ifndef IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_HANDLER_H_
+#define IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_HANDLER_H_
+
+#import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
+
+@class JsSuggestionManager;
+
+// This handles user actions in the default keyboard accessory view buttons.
+@interface FormInputAccessoryViewHandler
+    : NSObject<FormInputAccessoryViewDelegate>
+
+// The JS manager for interacting with the underlying form.
+@property(nonatomic, weak) JsSuggestionManager* JSSuggestionManager;
+
+// Resets the metrics logger of the instance.
+- (void)reset;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_HANDLER_H_

ios/chrome/browser/autofill/form_input_accessory_view_handler.mm

+// Copyright 2018 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/autofill/form_input_accessory_view_handler.h"
+
+#import <UIKit/UIKit.h>
+
+#include "base/mac/foundation_util.h"
+#import "components/autofill/core/browser/keyboard_accessory_metrics_logger.h"
+#import "components/autofill/ios/browser/js_suggestion_manager.h"
+#import "ios/chrome/browser/ui/uikit_ui_util.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+namespace autofill {
+NSString* const kFormSuggestionAssistButtonPreviousElement = @"previousTap";
+NSString* const kFormSuggestionAssistButtonNextElement = @"nextTap";
+NSString* const kFormSuggestionAssistButtonDone = @"done";
+}  // namespace autofill
+
+namespace {
+
+// Finds all views of a particular kind if class |aClass| in the subview
+// hierarchy of the given |root| view.
+NSArray* SubviewsWithClass(UIView* root, Class aClass) {
+  DCHECK(root);
+  NSMutableArray* viewsToExamine = [NSMutableArray arrayWithObject:root];
+  NSMutableArray* subviews = [NSMutableArray array];
+
+  while ([viewsToExamine count]) {
+    UIView* view = [viewsToExamine lastObject];
+    if ([view isKindOfClass:aClass])
+      [subviews addObject:view];
+
+    [viewsToExamine removeLastObject];
+    [viewsToExamine addObjectsFromArray:[view subviews]];
+  }
+
+  return subviews;
+}
+
+// Returns true if |item|'s action name contains |actionName|.
+BOOL ItemActionMatchesName(UIBarButtonItem* item, NSString* actionName) {
+  SEL itemAction = [item action];
+  if (!itemAction)
+    return false;
+  NSString* itemActionName = NSStringFromSelector(itemAction);
+
+  // This doesn't do a strict string match for the action name.
+  return [itemActionName rangeOfString:actionName].location != NSNotFound;
+}
+
+// Finds all UIToolbarItems associated with a given UIToolbar |toolbar| with
+// action selectors with a name that contains the action name specified by
+// |actionName|.
+NSArray* FindToolbarItemsForActionName(UIToolbar* toolbar,
+                                       NSString* actionName) {
+  NSMutableArray* toolbarItems = [NSMutableArray array];
+
+  for (UIBarButtonItem* item in [toolbar items]) {
+    if (ItemActionMatchesName(item, actionName))
+      [toolbarItems addObject:item];
+  }
+
+  return toolbarItems;
+}
+
+// Finds all UIToolbarItem(s) with action selectors of the name specified by
+// |actionName| in any UIToolbars in the view hierarchy below |root|.
+NSArray* FindDescendantToolbarItemsForActionName(UIView* root,
+                                                 NSString* actionName) {
+  NSMutableArray* descendants = [NSMutableArray array];
+
+  NSArray* toolbars = SubviewsWithClass(root, [UIToolbar class]);
+  for (UIToolbar* toolbar in toolbars) {
+    [descendants
+        addObjectsFromArray:FindToolbarItemsForActionName(toolbar, actionName)];
+  }
+
+  return descendants;
+}
+
+// Finds all UIBarButtonItem(s) with action selectors of the name specified by
+// |actionName| in the UITextInputAssistantItem passed.
+NSArray* FindDescendantToolbarItemsForActionName(
+    UITextInputAssistantItem* inputAssistantItem,
+    NSString* actionName) {
+  NSMutableArray* toolbarItems = [NSMutableArray array];
+
+  NSMutableArray* buttonGroupsGroup = [[NSMutableArray alloc] init];
+  if (inputAssistantItem.leadingBarButtonGroups)
+    [buttonGroupsGroup addObject:inputAssistantItem.leadingBarButtonGroups];
+  if (inputAssistantItem.trailingBarButtonGroups)
+    [buttonGroupsGroup addObject:inputAssistantItem.trailingBarButtonGroups];
+  for (NSArray* buttonGroups in buttonGroupsGroup) {
+    for (UIBarButtonItemGroup* group in buttonGroups) {
+      NSArray* items = group.barButtonItems;
+      for (UIBarButtonItem* item in items) {
+        if (ItemActionMatchesName(item, actionName))
+          [toolbarItems addObject:item];
+      }
+    }
+  }
+
+  return toolbarItems;
+}
+
+}  // namespace
+
+@implementation FormInputAccessoryViewHandler {
+  // Logs UMA metrics for the keyboard accessory.
+  std::unique_ptr<autofill::KeyboardAccessoryMetricsLogger>
+      _keyboardAccessoryMetricsLogger;
+}
+
+@synthesize JSSuggestionManager = _JSSuggestionManager;
+
+- (instancetype)init {
+  self = [super init];
+  if (self) {
+    _keyboardAccessoryMetricsLogger.reset(
+        new autofill::KeyboardAccessoryMetricsLogger());
+  }
+  return self;
+}
+
+// Attempts to execute/tap/send-an-event-to the iOS built-in "next" and
+// "previous" form assist controls. Returns NO if this attempt failed, YES
+// otherwise. [HACK] Because the buttons on the assist controls can change any
+// time, this can break with any new iOS version.
+- (BOOL)executeFormAssistAction:(NSString*)actionName {
+  NSArray* descendants = nil;
+  if (IsIPadIdiom()) {
+    // There is no input accessory view for iPads, instead Apple adds the assist
+    // controls to the UITextInputAssistantItem.
+    UIResponder* firstResponder = GetFirstResponder();
+    UITextInputAssistantItem* inputAssistantItem =
+        firstResponder.inputAssistantItem;
+    if (!inputAssistantItem)
+      return NO;
+    descendants =
+        FindDescendantToolbarItemsForActionName(inputAssistantItem, actionName);
+  } else {
+    UIResponder* firstResponder = GetFirstResponder();
+    UIView* inputAccessoryView = firstResponder.inputAccessoryView;
+    if (!inputAccessoryView)
+      return NO;
+    descendants =
+        FindDescendantToolbarItemsForActionName(inputAccessoryView, actionName);
+  }
+
+  if (![descendants count])
+    return NO;
+
+  UIBarButtonItem* item = descendants.firstObject;
+#pragma clang diagnostic push
+#pragma clang diagnostic ignored "-Warc-performSelector-leaks"
+  [[item target] performSelector:[item action] withObject:item];
+#pragma clang diagnostic pop
+  return YES;
+}
+
+- (void)reset {
+  _keyboardAccessoryMetricsLogger.reset(
+      new autofill::KeyboardAccessoryMetricsLogger());
+}
+
+#pragma mark - FormInputAccessoryViewDelegate
+
+- (void)closeKeyboardWithButtonPress {
+  [self closeKeyboardLoggingButtonPressed:YES];
+}
+
+- (void)closeKeyboardWithoutButtonPress {
+  [self closeKeyboardLoggingButtonPressed:NO];
+}
+
+- (void)selectPreviousElementWithButtonPress {
+  [self selectPreviousElementLoggingButtonPressed:YES];
+}
+
+- (void)selectPreviousElementWithoutButtonPress {
+  [self selectPreviousElementLoggingButtonPressed:NO];
+}
+
+- (void)selectNextElementWithButtonPress {
+  [self selectNextElementLoggingButtonPressed:YES];
+}
+
+- (void)selectNextElementWithoutButtonPress {
+  [self selectNextElementLoggingButtonPressed:NO];
+}
+
+- (void)fetchPreviousAndNextElementsPresenceWithCompletionHandler:
+    (void (^)(BOOL, BOOL))completionHandler {
+  DCHECK(completionHandler);
+  [_JSSuggestionManager
+      fetchPreviousAndNextElementsPresenceWithCompletionHandler:
+          completionHandler];
+}
+
+#pragma mark - Private
+
+// Tries to close the keyboard sendind an action to the default accessory bar
+// if that fails, fallbacks on JavaScript. Logs metrics if loggingButtonPressed
+// is YES.
+- (void)closeKeyboardLoggingButtonPressed:(BOOL)loggingButtonPressed {
+  NSString* actionName = autofill::kFormSuggestionAssistButtonDone;
+  BOOL performedAction = [self executeFormAssistAction:actionName];
+
+  if (!performedAction) {
+    // We could not find the built-in form assist controls, so try to focus
+    // the next or previous control using JavaScript.
+    [_JSSuggestionManager closeKeyboard];
+  }
+  if (loggingButtonPressed) {
+    _keyboardAccessoryMetricsLogger->OnCloseButtonPressed();
+  }
+}
+
+// Tries to focus on the next element sendind an action to the default accessory
+// bar if that fails, fallbacks on JavaScript. Logs metrics if
+// loggingButtonPressed is YES.
+- (void)selectPreviousElementLoggingButtonPressed:(BOOL)loggingButtonPressed {
+  NSString* actionName = autofill::kFormSuggestionAssistButtonPreviousElement;
+  BOOL performedAction = [self executeFormAssistAction:actionName];
+
+  if (!performedAction) {
+    // We could not find the built-in form assist controls, so try to focus
+    // the next or previous control using JavaScript.
+    [_JSSuggestionManager selectPreviousElement];
+  }
+  if (loggingButtonPressed) {
+    _keyboardAccessoryMetricsLogger->OnPreviousButtonPressed();
+  }
+}
+
+// Tries to focus on the previous element sendind an action to the default
+// accessory bar if that fails, fallbacks on JavaScript. Logs metrics if
+// loggingButtonPressed is YES.
+- (void)selectNextElementLoggingButtonPressed:(BOOL)loggingButtonPressed {
+  NSString* actionName = autofill::kFormSuggestionAssistButtonNextElement;
+  BOOL performedAction = [self executeFormAssistAction:actionName];
+
+  if (!performedAction) {
+    // We could not find the built-in form assist controls, so try to focus
+    // the next or previous control using JavaScript.
+    [_JSSuggestionManager selectNextElement];
+  }
+  if (loggingButtonPressed) {
+    _keyboardAccessoryMetricsLogger->OnNextButtonPressed();
+  }
+}
+
+@end

ios/chrome/browser/autofill/form_input_accessory_view_provider.h

@@ -5,6 +5,8 @@
 #ifndef IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_PROVIDER_H_
 #define IOS_CHROME_BROWSER_AUTOFILL_FORM_INPUT_ACCESSORY_VIEW_PROVIDER_H_
 
+#import <UIKit/UIKit.h>
+
 namespace web {
 struct FormActivityParams;
 class WebState;
@@ -12,9 +14,6 @@ class WebState;
 
 @protocol FormInputAccessoryViewDelegate;
 @protocol FormInputAccessoryViewProvider;
-@class FormInputAccessoryViewController;
-
-#import <UIKit/UIKit.h>
 
 // Block type to provide an accessory view asynchronously.
 typedef void (^AccessoryViewReadyCompletion)(
@@ -37,13 +36,7 @@ typedef void (^AccessoryViewReadyCompletion)(
                 (AccessoryViewReadyCompletion)accessoryViewUpdateBlock;
 
 // Notifies this provider that the accessory view is going away.
-- (void)inputAccessoryViewControllerDidReset:
-    (FormInputAccessoryViewController*)controller;
-
-// Notifies this provider that the accessory view frame is changing. If the
-// view provided by this provider needs to change, the updated view should be
-// set using |accessoryViewUpdateBlock|.
-- (void)resizeAccessoryView;
+- (void)inputAccessoryViewControllerDidReset;
 
 @end
 

ios/chrome/browser/autofill/form_input_egtest.mm

@@ -4,9 +4,11 @@
 
 #import <EarlGrey/EarlGrey.h>
 
+#include "base/mac/foundation_util.h"
 #include "base/strings/sys_string_conversions.h"
 #import "base/test/ios/wait_util.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
+#import "components/autofill/ios/browser/js_suggestion_manager.h"
+#import "ios/chrome/browser/autofill/form_input_accessory_view_handler.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #include "ios/chrome/grit/ios_strings.h"
 #import "ios/chrome/test/app/chrome_test_util.h"
@@ -19,6 +21,7 @@
 #include "ios/web/public/test/element_selector.h"
 #import "ios/web/public/test/http_server/http_server.h"
 #include "ios/web/public/test/http_server/http_server_util.h"
+#import "ios/web/public/web_state/js/crw_js_injection_receiver.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
@@ -154,14 +157,17 @@ void AssertElementIsFocused(const std::string& element_id) {
 // Tests that trying to programmatically dismiss the keyboard when it isn't
 // visible doesn't crash the browser.
 - (void)testCloseKeyboardWhenNotVisible {
-  FormInputAccessoryViewController* viewController =
-      [[FormInputAccessoryViewController alloc] init];
-  GREYAssertNotNil(
-      viewController,
-      @"The input accessory view controller should not be non nil.");
-  [viewController closeKeyboardWithoutButtonPress];
-  viewController.webState = chrome_test_util::GetCurrentWebState();
-  [viewController closeKeyboardWithoutButtonPress];
+  FormInputAccessoryViewHandler* accessoryViewDelegate =
+      [[FormInputAccessoryViewHandler alloc] init];
+  GREYAssertNotNil(accessoryViewDelegate,
+                   @"The Accessory View Delegate should not be non nil.");
+  [accessoryViewDelegate closeKeyboardWithoutButtonPress];
+  CRWJSInjectionReceiver* injectionReceiver =
+      chrome_test_util::GetCurrentWebState()->GetJSInjectionReceiver();
+  accessoryViewDelegate.JSSuggestionManager =
+      base::mac::ObjCCastStrict<JsSuggestionManager>(
+          [injectionReceiver instanceOfClass:[JsSuggestionManager class]]);
+  [accessoryViewDelegate closeKeyboardWithoutButtonPress];
 }
 
 @end

ios/chrome/browser/autofill/form_suggestion_controller.mm

@@ -16,6 +16,7 @@
 #import "components/autofill/ios/browser/form_suggestion.h"
 #import "components/autofill/ios/browser/form_suggestion_provider.h"
 #import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
+#import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
 #import "ios/chrome/browser/autofill/form_input_accessory_view_provider.h"
 #import "ios/chrome/browser/autofill/form_suggestion_view.h"
 #import "ios/chrome/browser/passwords/password_generation_utils.h"
@@ -350,7 +351,6 @@ AutofillSuggestionState::AutofillSuggestionState(
         completionHandler:^{
           [[weakSelf accessoryViewDelegate] closeKeyboardWithoutButtonPress];
         }];
-  _provider = nil;
 }
 
 - (id<FormInputAccessoryViewProvider>)accessoryViewProvider {
@@ -379,14 +379,9 @@ AutofillSuggestionState::AutofillSuggestionState(
   [self retrieveSuggestionsForForm:params webState:webState];
 }
 
-- (void)inputAccessoryViewControllerDidReset:
-    (FormInputAccessoryViewController*)controller {
+- (void)inputAccessoryViewControllerDidReset {
   accessoryViewUpdateBlock_ = nil;
   [self resetSuggestionState];
 }
 
-- (void)resizeAccessoryView {
-  [self updateKeyboard:_suggestionState.get()];
-}
-
 @end

ios/chrome/browser/autofill/form_suggestion_controller_unittest.mm

@@ -14,8 +14,9 @@
 #import "components/autofill/ios/browser/form_suggestion_provider.h"
 #import "components/autofill/ios/form_util/form_activity_observer_bridge.h"
 #include "components/autofill/ios/form_util/test_form_activity_tab_helper.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
+#import "ios/chrome/browser/autofill/form_input_accessory_consumer.h"
 #import "ios/chrome/browser/autofill/form_suggestion_view.h"
+#import "ios/chrome/browser/ui/autofill/form_input_accessory_mediator.h"
 #include "ios/chrome/browser/ui/ui_util.h"
 #import "ios/web/public/navigation_manager.h"
 #import "ios/web/public/test/fakes/test_web_state.h"
@@ -31,12 +32,6 @@
 #error "This file requires ARC support."
 #endif
 
-@interface FormInputAccessoryViewController (Testing)
-- (instancetype)initWithWebState:(web::WebState*)webState
-             JSSuggestionManager:(JsSuggestionManager*)JSSuggestionManager
-                       providers:(NSArray*)providers;
-@end
-
 // Test provider that records invocations of its interface methods.
 @interface TestSuggestionProvider : NSObject<FormSuggestionProvider>
 
@@ -181,52 +176,38 @@ class FormSuggestionControllerTest : public PlatformTest {
                   providers:providers
         JsSuggestionManager:mock_js_suggestion_manager_];
     [suggestion_controller_ setWebViewProxy:mock_web_view_proxy_];
-    @autoreleasepool {
-      accessory_controller_ = [[FormInputAccessoryViewController alloc]
-             initWithWebState:&test_web_state_
-          JSSuggestionManager:mock_js_suggestion_manager_
-                    providers:@[
-                      [suggestion_controller_ accessoryViewProvider]
-                    ]];
-    }
-    // Mock out the FormInputAccessoryViewController so it can use the fake
-    // CRWWebViewProxy
-    id mock_accessory_controller =
-        [OCMockObject partialMockForObject:accessory_controller_];
-    [[[mock_accessory_controller stub] andReturn:mock_web_view_proxy_]
-        webViewProxy];
-
-    // On iPad devices, the suggestion view is added directly to the
-    // keyboard view instead of to the input accessory view which is no longer
-    // available on iPad devices. The following code mocks out the methods on
-    // FormInputAccessoryViewController that add and remove the suggestion view.
-    // The mocks now just add and remove it directly to and from
-    // input_accessory_view_ so that the tests can locate it with
-    // GetSuggestionView (defined above).
-    // TODO(crbug.com/661622): Revisit this to see if there's a better way to
-    // test the iPad case. At a minimum, the name 'input_accessory_view_' should
-    // be made more generic.
-    if (IsIPadIdiom()) {
+
+    id mock_consumer_ = [OCMockObject
+        niceMockForProtocol:@protocol(FormInputAccessoryConsumer)];
+    accessory_mediator_ =
+        [[FormInputAccessoryMediator alloc] initWithConsumer:mock_consumer_
+                                                webStateList:NULL];
+    [accessory_mediator_ injectWebState:&test_web_state_];
+    [accessory_mediator_
+        injectProviders:@[ [suggestion_controller_ accessoryViewProvider] ]];
+    [accessory_mediator_ injectSuggestionManager:mock_js_suggestion_manager_];
+
+    // Mock the mediator consumer used to verify the suggestion views.
     void (^mockShow)(NSInvocation*) = ^(NSInvocation* invocation) {
-        __unsafe_unretained UIView* view;
-        [invocation getArgument:&view atIndex:2];
       for (UIView* view in [input_accessory_view_ subviews]) {
         [view removeFromSuperview];
       }
+      __unsafe_unretained UIView* view;
+      [invocation getArgument:&view atIndex:2];
       [input_accessory_view_ addSubview:view];
     };
-      [[[mock_accessory_controller stub] andDo:mockShow]
-          showCustomInputAccessoryView:[OCMArg any]];
+    [[[mock_consumer_ stub] andDo:mockShow]
+        showCustomInputAccessoryView:[OCMArg any]
+                  navigationDelegate:[OCMArg any]];
 
     void (^mockRestore)(NSInvocation*) = ^(NSInvocation* invocation) {
       for (UIView* view in [input_accessory_view_ subviews]) {
         [view removeFromSuperview];
       }
     };
-      [[[mock_accessory_controller stub] andDo:mockRestore]
+    [[[mock_consumer_ stub] andDo:mockRestore]
         restoreDefaultInputAccessoryView];
   }
-  }
 
   // The FormSuggestionController under test.
   FormSuggestionController* suggestion_controller_;
@@ -241,7 +222,7 @@ class FormSuggestionControllerTest : public PlatformTest {
   id mock_web_view_proxy_;
 
   // Accessory view controller.
-  FormInputAccessoryViewController* accessory_controller_;
+  FormInputAccessoryMediator* accessory_mediator_;
 
   // The fake WebState to simulate navigation and JavaScript events.
   web::TestWebState test_web_state_;

ios/chrome/browser/passwords/BUILD.gn

@@ -137,6 +137,7 @@ source_set("unit_tests") {
     "//ios/chrome/browser/autofill",
     "//ios/chrome/browser/browser_state:test_support",
     "//ios/chrome/browser/ssl",
+    "//ios/chrome/browser/ui/autofill:autofill",
     "//ios/chrome/browser/ui/commands",
     "//ios/chrome/browser/web:test_support",
     "//ios/chrome/browser/web:web_internal",

ios/chrome/browser/passwords/password_controller_unittest.mm

@@ -27,10 +27,10 @@
 #include "components/prefs/pref_registry_simple.h"
 #include "components/prefs/testing_pref_service.h"
 #include "components/security_state/ios/ssl_status_input_event_data.h"
-#import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
 #import "ios/chrome/browser/autofill/form_suggestion_controller.h"
 #include "ios/chrome/browser/browser_state/test_chrome_browser_state.h"
 #import "ios/chrome/browser/passwords/password_form_filler.h"
+#import "ios/chrome/browser/ui/autofill/form_input_accessory_mediator.h"
 #include "ios/chrome/browser/web/chrome_web_client.h"
 #import "ios/chrome/browser/web/chrome_web_test.h"
 #import "ios/web/public/navigation_item.h"
@@ -207,9 +207,12 @@ class PasswordControllerTest : public ChromeWebTest {
       suggestionController_ = [[PasswordsTestSuggestionController alloc]
           initWithWebState:web_state()
                  providers:@[ [passwordController_ suggestionProvider] ]];
-      accessoryViewController_ = [[FormInputAccessoryViewController alloc]
-          initWithWebState:web_state()
-                 providers:@[ [suggestionController_ accessoryViewProvider] ]];
+      accessoryMediator_ =
+          [[FormInputAccessoryMediator alloc] initWithConsumer:nil
+                                                  webStateList:NULL];
+      [accessoryMediator_ injectWebState:web_state()];
+      [accessoryMediator_
+          injectProviders:@[ [suggestionController_ accessoryViewProvider] ]];
     }
   }
 
@@ -275,8 +278,8 @@ class PasswordControllerTest : public ChromeWebTest {
   // SuggestionController for testing.
   PasswordsTestSuggestionController* suggestionController_;
 
-  // FormInputAccessoryViewController for testing.
-  FormInputAccessoryViewController* accessoryViewController_;
+  // FormInputAccessoryMediatorfor testing.
+  FormInputAccessoryMediator* accessoryMediator_;
 
   // PasswordController for testing.
   PasswordController* passwordController_;

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

@@ -13,6 +13,8 @@ source_set("autofill") {
     "chrome_autofill_client_ios.mm",
     "form_input_accessory_coordinator.h",
     "form_input_accessory_coordinator.mm",
+    "form_input_accessory_mediator.h",
+    "form_input_accessory_mediator.mm",
   ]
   deps = [
     ":autofill_ui",
@@ -20,6 +22,7 @@ source_set("autofill") {
     "//components/autofill/core/browser",
     "//components/autofill/core/common",
     "//components/autofill/ios/browser",
+    "//components/autofill/ios/form_util",
     "//components/browser_sync",
     "//components/infobars/core",
     "//components/keyed_service/core",
@@ -32,6 +35,7 @@ source_set("autofill") {
     "//ios/chrome/browser/browser_state",
     "//ios/chrome/browser/infobars",
     "//ios/chrome/browser/metrics",
+    "//ios/chrome/browser/passwords:passwords_generation_utils",
     "//ios/chrome/browser/signin",
     "//ios/chrome/browser/ssl",
     "//ios/chrome/browser/sync",

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

@@ -4,33 +4,30 @@
 
 #import "ios/chrome/browser/ui/autofill/form_input_accessory_coordinator.h"
 
+#include "base/mac/foundation_util.h"
+#import "components/autofill/ios/browser/js_suggestion_manager.h"
 #import "ios/chrome/browser/autofill/form_input_accessory_view_controller.h"
-#import "ios/chrome/browser/web_state_list/web_state_list.h"
-#import "ios/chrome/browser/web_state_list/web_state_list_observer_bridge.h"
-#include "ios/web/public/web_state/web_state.h"
+#import "ios/chrome/browser/ui/autofill/form_input_accessory_mediator.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
-@interface FormInputAccessoryCoordinator ()<WebStateListObserving>
+@interface FormInputAccessoryCoordinator ()
 
 // The View Controller for the input accessory view.
 @property FormInputAccessoryViewController* formInputAccessoryViewController;
 
-@end
+// The Mediator for the input accessory view controller.
+@property FormInputAccessoryMediator* formInputAccessoryMediator;
 
-@implementation FormInputAccessoryCoordinator {
-  // The WebStateList this instance is observing in order to update the
-  // active WebState.
-  WebStateList* _webStateList;
+@end
 
-  // Bridge to observe the web state list from Objective-C.
-  std::unique_ptr<WebStateListObserverBridge> _webStateListObserver;
-}
+@implementation FormInputAccessoryCoordinator
 
 @synthesize formInputAccessoryViewController =
     _formInputAccessoryViewController;
+@synthesize formInputAccessoryMediator = _formInputAccessoryMediator;
 
 - (instancetype)initWithBaseViewController:(UIViewController*)viewController
                               browserState:
@@ -40,46 +37,13 @@
                               browserState:browserState];
   if (self) {
     DCHECK(webStateList);
-    _webStateList = webStateList;
-    _webStateListObserver = std::make_unique<WebStateListObserverBridge>(self);
-    _webStateList->AddObserver(_webStateListObserver.get());
+    _formInputAccessoryViewController =
+        [[FormInputAccessoryViewController alloc] init];
+    _formInputAccessoryMediator = [[FormInputAccessoryMediator alloc]
+        initWithConsumer:self.formInputAccessoryViewController
+            webStateList:webStateList];
   }
   return self;
 }
 
-- (void)dealloc {
-  if (_webStateList) {
-    _webStateList->RemoveObserver(_webStateListObserver.get());
-    _webStateListObserver.reset();
-    _webStateList = nullptr;
-  }
-}
-
-- (void)start {
-  self.formInputAccessoryViewController =
-      [[FormInputAccessoryViewController alloc] init];
-  [self updateFormInputAccessoryViewController];
-}
-
-- (void)stop {
-  self.formInputAccessoryViewController = nil;
-}
-
-#pragma mark - Private
-
-- (void)updateFormInputAccessoryViewController {
-  web::WebState* activeWebState = _webStateList->GetActiveWebState();
-  self.formInputAccessoryViewController.webState = activeWebState;
-}
-
-#pragma mark - CRWWebStateListObserver
-
-- (void)webStateList:(WebStateList*)webStateList
-    didChangeActiveWebState:(web::WebState*)newWebState
-                oldWebState:(web::WebState*)oldWebState
-                    atIndex:(int)atIndex
-                     reason:(int)reason {
-  self.formInputAccessoryViewController.webState = newWebState;
-}
-
 @end

ios/chrome/browser/ui/autofill/form_input_accessory_mediator.h

+// Copyright 2018 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.
+
+#ifndef IOS_CHROME_BROWSER_UI_AUTOFILL_FORM_INPUT_ACCESSORY_MEDIATOR_H_
+#define IOS_CHROME_BROWSER_UI_AUTOFILL_FORM_INPUT_ACCESSORY_MEDIATOR_H_
+
+#import <Foundation/Foundation.h>
+
+#import "ios/chrome/browser/autofill/form_input_accessory_view_delegate.h"
+#import "ios/chrome/browser/web_state_list/web_state_list_observer_bridge.h"
+#import "ios/web/public/web_state/web_state_observer_bridge.h"
+
+@protocol FormInputAccessoryConsumer;
+@protocol FormInputAccessoryViewProvider;
+@class JsSuggestionManager;
+class WebStateList;
+namespace web {
+class WebState;
+}
+
+// This class contains all the logic to get and provide keyboard input accessory
+// views to its consumer. As well as telling the consumer when the default
+// accessory view shoeuld be restored to the system default.
+@interface FormInputAccessoryMediator : NSObject
+
+// Returns a mediator observing the passed `WebStateList` and associated with
+// the passed consumer. `webSateList` can be nullptr and `consumer` can be nil.
+- (instancetype)initWithConsumer:(id<FormInputAccessoryConsumer>)consumer
+                    webStateList:(WebStateList*)webStateList;
+
+// Unavailable, use initWithConsumer:webStateList: instead.
+- (instancetype)init NS_UNAVAILABLE;
+
+@end
+
+// Methods to allow injection in tests.
+@interface FormInputAccessoryMediator (Tests)
+
+// The WebState this instance is observing. Can be null.
+- (void)injectWebState:(web::WebState*)webState;
+
+// The JS manager for interacting with the underlying form.
+- (void)injectSuggestionManager:(JsSuggestionManager*)JSSuggestionManager;
+
+// The objects that can provide a custom input accessory view while filling
+// forms.
+- (void)injectProviders:(NSArray<id<FormInputAccessoryViewProvider>>*)providers;
+
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_AUTOFILL_FORM_INPUT_ACCESSORY_MEDIATOR_H_

ios/web/public/web_state/ui/crw_web_view_proxy.h

@@ -65,9 +65,6 @@
 // Returns the currently visible keyboard accessory, or nil.
 - (UIView*)keyboardAccessory;
 
-// Returns the currently visible keyboard input assistant item, or nil.
-- (UITextInputAssistantItem*)inputAssistantItem;
-
 // Wrapper around the becomeFirstResponder method of the webview.
 - (BOOL)becomeFirstResponder;
 

ios/web/web_state/ui/crw_web_view_proxy_impl.mm

@@ -175,13 +175,6 @@ UIView* GetFirstResponderSubview(UIView* view) {
   return firstResponder.inputAccessoryView;
 }
 
-- (UITextInputAssistantItem*)inputAssistantItem {
-  if (!_contentView)
-    return nil;
-  UIView* firstResponder = GetFirstResponderSubview(_contentView);
-  return firstResponder.inputAssistantItem;
-}
-
 - (BOOL)becomeFirstResponder {
   return [_contentView becomeFirstResponder];
 }