ios/showcase/tab_grid/sc_grid_coordinator.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/showcase/tab_grid/sc_grid_coordinator.h"

#import "ios/chrome/browser/ui/tab_grid/grid/grid_image_data_source.h"
#import "ios/chrome/browser/ui/tab_grid/grid/grid_item.h"
#import "ios/chrome/browser/ui/tab_grid/grid/grid_view_controller.h"
#import "ios/showcase/common/protocol_alerter.h"

#if !defined(__has_feature) || !__has_feature(objc_arc)
#error "This file requires ARC support."
#endif

@interface SCGridCoordinator ()<UINavigationControllerDelegate,
                                GridImageDataSource>
@property(nonatomic, strong) ProtocolAlerter* alerter;
@property(nonatomic, strong) GridViewController* gridViewController;
@end

@implementation SCGridCoordinator
@synthesize baseViewController = _baseViewController;
@synthesize alerter = _alerter;
@synthesize gridViewController = _gridViewController;

- (void)start {
  self.baseViewController.delegate = self;
  self.alerter = [[ProtocolAlerter alloc]
      initWithProtocols:@[ @protocol(GridViewControllerDelegate) ]];
  GridViewController* gridViewController = [[GridViewController alloc] init];
  gridViewController.theme = GridThemeLight;
  gridViewController.delegate =
      static_cast<id<GridViewControllerDelegate>>(self.alerter);
  gridViewController.imageDataSource = self;
  self.alerter.baseViewController = gridViewController;

  NSMutableArray<GridItem*>* items = [[NSMutableArray alloc] init];
  for (int i = 0; i < 20; i++) {
    GridItem* item = [[GridItem alloc]
        initWithIdentifier:[NSString stringWithFormat:@"item%d", i]];
    item.title = @"The New York Times - Breaking News";
    [items addObject:item];
  }
  [gridViewController populateItems:items selectedItemID:items[0].identifier];
  gridViewController.title = @"Grid UI";
  [self.baseViewController pushViewController:gridViewController animated:YES];
  self.gridViewController = gridViewController;
}

#pragma mark - UINavigationControllerDelegate

// This delegate method is used as a way to have a completion handler after
// pushing onto a navigation controller.
- (void)navigationController:(UINavigationController*)navigationController
       didShowViewController:(UIViewController*)viewController
                    animated:(BOOL)animated {
}

#pragma mark - GridImageDataSource

- (void)snapshotForIdentifier:(NSString*)identifier
                   completion:(void (^)(UIImage*))completion {
  completion([UIImage imageNamed:@"Sample-screenshot-portrait"]);
}

- (void)faviconForIdentifier:(NSString*)identifier
                  completion:(void (^)(UIImage*))completion {
  completion(nil);
}

- (void)preloadSnapshotsForVisibleGridSize:(int)gridSize {
  // No-op here.
}

- (void)clearPreloadedSnapshots {
  // No-op here.
}

@end