Move ios/ui/suggestions to ios/ui/content_suggestions

ios/chrome/browser/ui/suggestions/suggestions_view_controller.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/chrome/browser/ui/suggestions/suggestions_view_controller.h"
-
-#include "base/mac/foundation_util.h"
-#import "ios/chrome/browser/ui/collection_view/cells/MDCCollectionViewCell+Chrome.h"
-#import "ios/chrome/browser/ui/collection_view/cells/collection_view_item.h"
-#import "ios/chrome/browser/ui/collection_view/collection_view_model.h"
-#import "ios/chrome/browser/ui/suggestions/expandable_item.h"
-#import "ios/chrome/browser/ui/suggestions/suggestions_collection_updater.h"
-#import "ios/chrome/browser/ui/suggestions/suggestions_commands.h"
-#import "ios/chrome/browser/ui/suggestions/suggestions_item_actions.h"
-#import "ios/chrome/browser/ui/suggestions/suggestions_stack_item.h"
-#import "ios/chrome/browser/ui/suggestions/suggestions_stack_item_actions.h"
-
-#if !defined(__has_feature) || !__has_feature(objc_arc)
-#error "This file requires ARC support."
-#endif
-
-namespace {
-const NSTimeInterval kAnimationDuration = 0.35;
-}  // namespace
-
-@interface SuggestionsViewController ()<SuggestionsItemActions,
-                                        SuggestionsStackItemActions>
-
-@property(nonatomic, strong) SuggestionsCollectionUpdater* collectionUpdater;
-
-// Expand or collapse the |cell|, if it is a SuggestionsExpandableCell,
-// according to |expand|.
-- (void)expand:(BOOL)expand cell:(UICollectionViewCell*)cell;
-
-@end
-
-@implementation SuggestionsViewController
-
-@synthesize suggestionCommandHandler = _suggestionCommandHandler;
-@synthesize collectionUpdater = _collectionUpdater;
-
-#pragma mark - UIViewController
-
-- (void)viewDidLoad {
-  [super viewDidLoad];
-
-  _collectionUpdater = [[SuggestionsCollectionUpdater alloc] init];
-  _collectionUpdater.collectionViewController = self;
-
-  self.collectionView.delegate = self;
-  self.styler.cellStyle = MDCCollectionViewCellStyleCard;
-}
-
-#pragma mark - UICollectionViewDelegate
-
-- (void)collectionView:(UICollectionView*)collectionView
-    didSelectItemAtIndexPath:(NSIndexPath*)indexPath {
-  [super collectionView:collectionView didSelectItemAtIndexPath:indexPath];
-
-  CollectionViewItem* item =
-      [self.collectionViewModel itemAtIndexPath:indexPath];
-  if (item.type == ItemTypeStack) {
-    [self.suggestionCommandHandler openReadingList];
-  }
-}
-
-#pragma mark - SuggestionsExpandableCellDelegate
-
-- (void)collapseCell:(UICollectionViewCell*)cell {
-  [self expand:NO cell:cell];
-}
-
-- (void)expandCell:(UICollectionViewCell*)cell {
-  [self expand:YES cell:cell];
-}
-
-#pragma mark - SuggestionsItemActions
-
-- (void)addNewItem:(id)sender {
-  [self.suggestionCommandHandler addEmptyItem];
-}
-
-#pragma mark - SuggestionsCollectionUpdater forwarding
-
-- (void)addTextItem:(NSString*)title
-           subtitle:(NSString*)subtitle
-          toSection:(NSInteger)inputSection {
-  [self.collectionUpdater addTextItem:title
-                             subtitle:subtitle
-                            toSection:inputSection];
-}
-
-#pragma mark - SuggestionsStackItemActions
-
-- (void)openReadingListFirstItem:(id)sender {
-  [self.suggestionCommandHandler openFirstPageOfReadingList];
-}
-
-#pragma mark - MDCCollectionViewStylingDelegate
-
-- (UIColor*)collectionView:(nonnull UICollectionView*)collectionView
-    cellBackgroundColorAtIndexPath:(nonnull NSIndexPath*)indexPath {
-  if ([self.collectionUpdater
-          shouldUseCustomStyleForSection:indexPath.section]) {
-    return [UIColor clearColor];
-  }
-  return [UIColor whiteColor];
-}
-
-- (BOOL)collectionView:(nonnull UICollectionView*)collectionView
-    shouldHideItemBackgroundAtIndexPath:(nonnull NSIndexPath*)indexPath {
-  if ([self.collectionUpdater
-          shouldUseCustomStyleForSection:indexPath.section]) {
-    return YES;
-  }
-  return NO;
-}
-
-- (CGFloat)collectionView:(UICollectionView*)collectionView
-    cellHeightAtIndexPath:(NSIndexPath*)indexPath {
-  CollectionViewItem* item =
-      [self.collectionViewModel itemAtIndexPath:indexPath];
-  UIEdgeInsets inset = [self collectionView:collectionView
-                                     layout:collectionView.collectionViewLayout
-                     insetForSectionAtIndex:indexPath.section];
-
-  return [MDCCollectionViewCell
-      cr_preferredHeightForWidth:CGRectGetWidth(collectionView.bounds) -
-                                 inset.left - inset.right
-                         forItem:item];
-}
-
-#pragma mark - Private
-
-- (void)expand:(BOOL)expand cell:(UICollectionViewCell*)cell {
-  NSIndexPath* indexPath = [self.collectionView indexPathForCell:cell];
-  CollectionViewItem* item =
-      [self.collectionViewModel itemAtIndexPath:indexPath];
-  if ([item conformsToProtocol:@protocol(SuggestionsExpandableArticle)]) {
-    id<SuggestionsExpandableArticle> expandableItem =
-        (id<SuggestionsExpandableArticle>)item;
-
-    NSInteger sectionIdentifier = [self.collectionViewModel
-        sectionIdentifierForSection:indexPath.section];
-
-    expandableItem.expanded = expand;
-    [self reconfigureCellsForItems:@[ item ]
-           inSectionWithIdentifier:sectionIdentifier];
-
-    [UIView
-        animateWithDuration:kAnimationDuration
-                 animations:^{
-                   [self.collectionView.collectionViewLayout invalidateLayout];
-                 }];
-  }
-}
-
-@end