Upstream ios/showcase source code.

ios/showcase/tab_grid/sc_tab_grid_coordinator.mm

+// Copyright 2016 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/showcase/tab_grid/sc_tab_grid_coordinator.h"
+
+#import "base/format_macros.h"
+#import "ios/chrome/browser/ui/tab_grid/tab_grid_view_controller.h"
+
+#if !defined(__has_feature) || !__has_feature(objc_arc)
+#error "This file requires ARC support."
+#endif
+
+@interface SCTabGridCoordinator ()<TabGridDataSource, TabGridActionDelegate>
+@property(nonatomic, strong) TabGridViewController* viewController;
+@end
+
+@implementation SCTabGridCoordinator
+@synthesize baseViewController = _baseViewController;
+@synthesize viewController = _viewController;
+
+- (void)start {
+  self.viewController = [[TabGridViewController alloc] init];
+  self.viewController.title = @"Tab Grid";
+  self.viewController.dataSource = self;
+  self.viewController.actionDelegate = self;
+  [self.baseViewController setHidesBarsOnSwipe:YES];
+  [self.baseViewController pushViewController:self.viewController animated:YES];
+}
+
+#pragma mark - TabGridDataSource
+
+- (NSUInteger)numberOfTabsInTabGrid {
+  return 3;
+}
+
+- (NSString*)titleAtIndex:(NSInteger)index {
+  return [NSString stringWithFormat:@"Tab %" PRIdNS, index];
+}
+
+#pragma mark - TabGridActionDelegate
+
+- (void)showTabAtIndexPath:(NSIndexPath*)indexPath {
+  [self
+      showAlertWithTitle:NSStringFromProtocol(@protocol(TabGridActionDelegate))
+                 message:[NSString
+                             stringWithFormat:@"showTabAtIndexPath:%" PRIdNS,
+                                              indexPath.item]];
+}
+
+- (void)showTabGrid {
+  [self
+      showAlertWithTitle:NSStringFromProtocol(@protocol(TabGridActionDelegate))
+                 message:NSStringFromSelector(_cmd)];
+}
+
+- (void)showSettings {
+  [self
+      showAlertWithTitle:NSStringFromProtocol(@protocol(TabGridActionDelegate))
+                 message:NSStringFromSelector(_cmd)];
+}
+
+#pragma mark - Private
+
+// Helper to show simple alert.
+- (void)showAlertWithTitle:(NSString*)title message:(NSString*)message {
+  UIAlertController* alertController =
+      [UIAlertController alertControllerWithTitle:title
+                                          message:message
+                                   preferredStyle:UIAlertControllerStyleAlert];
+  UIAlertAction* action =
+      [UIAlertAction actionWithTitle:@"Done"
+                               style:UIAlertActionStyleCancel
+                             handler:nil];
+  [alertController addAction:action];
+  [self.baseViewController presentViewController:alertController
+                                        animated:YES
+                                      completion:nil];
+}
+
+@end