[ios] Beginnings of tab grid mediator

Bug: 804496
Cq-Include-Trybots: master.tryserver.chromium.mac:ios-simulator-cronet;master.tryserver.chromium.mac:ios-simulator-full-configs
Change-Id: Ifed54179a9f9ffb5e61f270664af35a3f86c9deb
Reviewed-on: https://chromium-review.googlesource.com/924532Reviewed-by: edchin <edchin@chromium.org>
Reviewed-by: Mark Cogan <marq@chromium.org>
Commit-Queue: edchin <edchin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#537509}

ios/chrome/app/main_controller.mm

@@ -901,8 +901,11 @@ void MainControllerAuthenticationServiceDelegate::ClearBrowsingData(
   if (!_mainCoordinator) {
     // Lazily create the main coordinator.
     if (IsTabSwitcherTabGridEnabled()) {
-      _mainCoordinator =
+      TabGridCoordinator* tabGridCoordinator =
           [[TabGridCoordinator alloc] initWithWindow:self.window];
+      tabGridCoordinator.regularTabModel = self.mainTabModel;
+      tabGridCoordinator.incognitoTabModel = self.otrTabModel;
+      _mainCoordinator = tabGridCoordinator;
     } else {
       _mainCoordinator = [[MainCoordinator alloc] initWithWindow:self.window];
     }

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

@@ -10,6 +10,8 @@ source_set("tab_grid") {
     "tab_grid_adaptor.mm",
     "tab_grid_coordinator.h",
     "tab_grid_coordinator.mm",
+    "tab_grid_mediator.h",
+    "tab_grid_mediator.mm",
   ]
 
   configs += [ "//build/config/compiler:enable_arc" ]
@@ -17,6 +19,7 @@ source_set("tab_grid") {
   deps = [
     ":tab_grid_ui",
     "//base",
+    "//ios/chrome/browser/tabs",
     "//ios/chrome/browser/ui/coordinators:chrome_coordinators",
     "//ios/chrome/browser/ui/main",
     "//ios/chrome/browser/ui/tab_switcher",

ios/chrome/browser/ui/tab_grid/tab_grid_coordinator.h

@@ -10,12 +10,16 @@
 #import "ios/chrome/browser/ui/main/main_coordinator.h"
 #import "ios/chrome/browser/ui/main/view_controller_swapping.h"
 
+@class TabModel;
 @protocol TabSwitcher;
 
 @interface TabGridCoordinator : MainCoordinator<ViewControllerSwapping>
 
 @property(nonatomic, readonly) id<TabSwitcher> tabSwitcher;
 
+@property(nonatomic, weak) TabModel* regularTabModel;
+@property(nonatomic, weak) TabModel* incognitoTabModel;
+
 // If this property is YES, calls to |showTabSwitcher:completion:| and
 // |showTabViewController:completion:| will present the given view controllers
 // without animation.  This should only be used by unittests.

ios/chrome/browser/ui/tab_grid/tab_grid_coordinator.mm

@@ -4,9 +4,10 @@
 
 #import "ios/chrome/browser/ui/tab_grid/tab_grid_coordinator.h"
 
+#import "ios/chrome/browser/tabs/tab_model.h"
 #import "ios/chrome/browser/ui/main/bvc_container_view_controller.h"
 #import "ios/chrome/browser/ui/tab_grid/tab_grid_adaptor.h"
-
+#import "ios/chrome/browser/ui/tab_grid/tab_grid_mediator.h"
 #import "ios/chrome/browser/ui/tab_grid/tab_grid_view_controller.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
@@ -19,6 +20,8 @@
 // Container view controller for the BVC to live in; this class's view
 // controller will present this.
 @property(nonatomic, strong) BVCContainerViewController* bvcContainer;
+// Mediates between the model layer and the tab grid UI layer.
+@property(nonatomic, strong) TabGridMediator* mediator;
 @end
 
 @implementation TabGridCoordinator
@@ -26,9 +29,12 @@
 @synthesize mainViewController = _mainViewController;
 // Public properties.
 @synthesize animationsDisabledForTesting = _animationsDisabledForTesting;
+@synthesize regularTabModel = _regularTabModel;
+@synthesize incognitoTabModel = _incognitoTabModel;
 // Private properties.
 @synthesize adaptor = _adaptor;
 @synthesize bvcContainer = _bvcContainer;
+@synthesize mediator = _mediator;
 
 #pragma mark - Public properties
 
@@ -51,6 +57,10 @@
   self.window.rootViewController = self.mainViewController;
   self.adaptor = [[TabGridAdaptor alloc] init];
   self.adaptor.tabGridViewController = self.mainViewController;
+
+  self.mediator = [[TabGridMediator alloc] init];
+  self.mediator.regularTabModel = self.regularTabModel;
+  self.mediator.incognitoTabModel = self.incognitoTabModel;
 }
 
 #pragma mark - UIViewControllerTransitioningDelegate

ios/chrome/browser/ui/tab_grid/tab_grid_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_TAB_GRID_TAB_GRID_MEDIATOR_H_
+#define IOS_CHROME_BROWSER_UI_TAB_GRID_TAB_GRID_MEDIATOR_H_
+
+#import <Foundation/Foundation.h>
+
+@class TabModel;
+
+// Mediates between model layer and tab grid UI layer.
+@interface TabGridMediator : NSObject
+@property(nonatomic, weak) TabModel* regularTabModel;
+@property(nonatomic, weak) TabModel* incognitoTabModel;
+@end
+
+#endif  // IOS_CHROME_BROWSER_UI_TAB_GRID_TAB_GRID_MEDIATOR_H_

ios/chrome/browser/ui/tab_grid/tab_grid_mediator.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/ui/tab_grid/tab_grid_mediator.h"
+
+#import "ios/chrome/browser/tabs/tab_model.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@implementation TabGridMediator
+@synthesize regularTabModel = _regularTabModel;
+@synthesize incognitoTabModel = _incognitoTabModel;
+@end