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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #import "ios/chrome/browser/ui/content_suggestions/content_suggestions_expandabl
e_item.h" | |
| 6 | |
| 7 #import "ios/chrome/browser/ui/uikit_ui_util.h" | |
| 8 #include "ui/base/l10n/l10n_util_mac.h" | |
| 9 | |
| 10 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
| 11 #error "This file requires ARC support." | |
| 12 #endif | |
| 13 | |
| 14 namespace { | |
| 15 const CGFloat kImageSize = 80; | |
| 16 const CGFloat kStandardSpacing = 8; | |
| 17 } | |
| 18 | |
| 19 #pragma mark - SuggestionsExpandableItem | |
| 20 | |
| 21 @implementation SuggestionsExpandableItem { | |
| 22 NSString* _title; | |
| 23 NSString* _subtitle; | |
| 24 UIImage* _image; | |
| 25 NSString* _detail; | |
| 26 } | |
| 27 | |
| 28 @synthesize delegate = _delegate; | |
| 29 @synthesize expanded = _expanded; | |
| 30 | |
| 31 - (instancetype)initWithType:(NSInteger)type | |
| 32 title:(NSString*)title | |
| 33 subtitle:(NSString*)subtitle | |
| 34 image:(UIImage*)image | |
| 35 detailText:(NSString*)detail { | |
| 36 self = [super initWithType:type]; | |
| 37 if (self) { | |
| 38 self.cellClass = [ContentSuggestionsExpandableCell class]; | |
| 39 _title = [title copy]; | |
| 40 _subtitle = [subtitle copy]; | |
| 41 _image = image; | |
| 42 _detail = [detail copy]; | |
| 43 } | |
| 44 return self; | |
| 45 } | |
| 46 | |
| 47 #pragma mark - CollectionViewItem | |
| 48 | |
| 49 - (void)configureCell:(ContentSuggestionsExpandableCell*)cell { | |
| 50 [super configureCell:cell]; | |
| 51 cell.delegate = self.delegate; | |
| 52 cell.titleLabel.text = _title; | |
| 53 cell.subtitleLabel.text = _subtitle; | |
| 54 cell.imageView.image = _image; | |
| 55 cell.detailLabel.text = _detail; | |
| 56 if (self.expanded) | |
| 57 [cell expand]; | |
| 58 else | |
| 59 [cell collapse]; | |
| 60 } | |
| 61 | |
| 62 @end | |
| 63 | |
| 64 #pragma mark - ContentSuggestionsExpandableCell | |
| 65 | |
| 66 @interface ContentSuggestionsExpandableCell () { | |
| 67 UIView* _articleContainer; | |
| 68 UIButton* _interactionButton; | |
| 69 UIButton* _expandButton; | |
| 70 BOOL _expanded; | |
| 71 NSArray<NSLayoutConstraint*>* _expandedConstraints; | |
| 72 NSArray<NSLayoutConstraint*>* _collapsedConstraints; | |
| 73 } | |
| 74 | |
| 75 // Callback for the UI action showing the details. | |
| 76 - (void)expand:(id)sender; | |
| 77 // Callback for the UI action hiding the details. | |
| 78 - (void)collapse:(id)sender; | |
| 79 | |
| 80 @end | |
| 81 | |
| 82 @implementation ContentSuggestionsExpandableCell | |
| 83 | |
| 84 @synthesize titleLabel = _titleLabel; | |
| 85 @synthesize subtitleLabel = _subtitleLabel; | |
| 86 @synthesize detailLabel = _detailLabel; | |
| 87 @synthesize imageView = _imageView; | |
| 88 @synthesize delegate = _delegate; | |
| 89 | |
| 90 - (instancetype)initWithFrame:(CGRect)frame { | |
| 91 self = [super initWithFrame:frame]; | |
| 92 if (self) { | |
| 93 _expanded = NO; | |
| 94 _titleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 95 _subtitleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 96 _imageView = [[UIImageView alloc] initWithFrame:CGRectZero]; | |
| 97 _articleContainer = [[UIView alloc] initWithFrame:CGRectZero]; | |
| 98 _expandButton = [UIButton buttonWithType:UIButtonTypeSystem]; | |
| 99 _detailLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 100 _interactionButton = [UIButton buttonWithType:UIButtonTypeSystem]; | |
| 101 | |
| 102 _subtitleLabel.numberOfLines = 0; | |
| 103 [_expandButton setTitle:@"See more" forState:UIControlStateNormal]; | |
| 104 _detailLabel.numberOfLines = 0; | |
| 105 [_interactionButton setTitle:@"Less interaction" | |
| 106 forState:UIControlStateNormal]; | |
| 107 | |
| 108 _imageView.translatesAutoresizingMaskIntoConstraints = NO; | |
| 109 _titleLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 110 _subtitleLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 111 _articleContainer.translatesAutoresizingMaskIntoConstraints = NO; | |
| 112 _expandButton.translatesAutoresizingMaskIntoConstraints = NO; | |
| 113 _detailLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 114 _interactionButton.translatesAutoresizingMaskIntoConstraints = NO; | |
| 115 | |
| 116 [_expandButton addTarget:self | |
| 117 action:@selector(expand:) | |
| 118 forControlEvents:UIControlEventTouchUpInside]; | |
| 119 [_interactionButton addTarget:self | |
| 120 action:@selector(collapse:) | |
| 121 forControlEvents:UIControlEventTouchUpInside]; | |
| 122 | |
| 123 [_articleContainer addSubview:_imageView]; | |
| 124 [_articleContainer addSubview:_titleLabel]; | |
| 125 [_articleContainer addSubview:_subtitleLabel]; | |
| 126 | |
| 127 [self.contentView addSubview:_articleContainer]; | |
| 128 [self.contentView addSubview:_expandButton]; | |
| 129 | |
| 130 [NSLayoutConstraint activateConstraints:@[ | |
| 131 [self.contentView.centerXAnchor | |
| 132 constraintEqualToAnchor:_expandButton.centerXAnchor], | |
| 133 [_expandButton.topAnchor | |
| 134 constraintEqualToAnchor:_articleContainer.bottomAnchor], | |
| 135 [_expandButton.bottomAnchor | |
| 136 constraintEqualToAnchor:self.contentView.bottomAnchor], | |
| 137 [_articleContainer.bottomAnchor | |
| 138 constraintGreaterThanOrEqualToAnchor:_imageView.bottomAnchor | |
| 139 constant:kStandardSpacing], | |
| 140 [_articleContainer.bottomAnchor | |
| 141 constraintGreaterThanOrEqualToAnchor:_subtitleLabel.bottomAnchor | |
| 142 constant:kStandardSpacing], | |
| 143 ]]; | |
| 144 | |
| 145 ApplyVisualConstraintsWithMetrics( | |
| 146 @[ | |
| 147 @"H:|[container]|", @"H:|-[title]-[image(imageSize)]-|", | |
| 148 @"H:|-[text]-[image]", @"V:|-[image(imageSize)]", | |
| 149 @"V:|-[title]-[text]", @"V:|[container]" | |
| 150 ], | |
| 151 @{ | |
| 152 @"image" : _imageView, | |
| 153 @"title" : _titleLabel, | |
| 154 @"text" : _subtitleLabel, | |
| 155 @"container" : _articleContainer | |
| 156 }, | |
| 157 @{ @"imageSize" : @(kImageSize) }); | |
| 158 | |
| 159 _expandedConstraints = @[ | |
| 160 [_detailLabel.topAnchor | |
| 161 constraintEqualToAnchor:_articleContainer.bottomAnchor], | |
| 162 [_detailLabel.bottomAnchor | |
| 163 constraintEqualToAnchor:_interactionButton.topAnchor], | |
| 164 [_interactionButton.bottomAnchor | |
| 165 constraintEqualToAnchor:self.contentView.bottomAnchor], | |
| 166 [_detailLabel.leadingAnchor | |
| 167 constraintEqualToAnchor:self.contentView.leadingAnchor], | |
| 168 [_detailLabel.trailingAnchor | |
| 169 constraintEqualToAnchor:self.contentView.trailingAnchor] | |
| 170 ]; | |
| 171 _collapsedConstraints = @[ | |
| 172 [self.contentView.centerXAnchor | |
| 173 constraintEqualToAnchor:_expandButton.centerXAnchor], | |
| 174 [_expandButton.topAnchor | |
| 175 constraintEqualToAnchor:_articleContainer.bottomAnchor], | |
| 176 [_expandButton.bottomAnchor | |
| 177 constraintEqualToAnchor:self.contentView.bottomAnchor] | |
| 178 ]; | |
| 179 } | |
| 180 return self; | |
| 181 } | |
| 182 | |
| 183 #pragma mark - Private | |
| 184 | |
| 185 - (void)expand:(id)sender { | |
| 186 [self.delegate expandCell:self]; | |
| 187 } | |
| 188 | |
| 189 - (void)collapse:(id)sender { | |
| 190 [self.delegate collapseCell:self]; | |
| 191 } | |
| 192 | |
| 193 - (void)expand { | |
| 194 if (_expanded) | |
| 195 return; | |
| 196 _expanded = YES; | |
| 197 | |
| 198 [self.contentView addSubview:_detailLabel]; | |
| 199 [self.contentView addSubview:_interactionButton]; | |
| 200 [_expandButton removeFromSuperview]; | |
| 201 | |
| 202 [NSLayoutConstraint deactivateConstraints:_collapsedConstraints]; | |
| 203 [NSLayoutConstraint activateConstraints:_expandedConstraints]; | |
| 204 } | |
| 205 | |
| 206 - (void)collapse { | |
| 207 if (!_expanded) | |
| 208 return; | |
| 209 _expanded = NO; | |
| 210 | |
| 211 [_detailLabel removeFromSuperview]; | |
| 212 [_interactionButton removeFromSuperview]; | |
| 213 [self.contentView addSubview:_expandButton]; | |
| 214 | |
| 215 [NSLayoutConstraint deactivateConstraints:_expandedConstraints]; | |
| 216 [NSLayoutConstraint activateConstraints:_collapsedConstraints]; | |
| 217 } | |
| 218 | |
| 219 #pragma mark - UIView | |
| 220 | |
| 221 // Implements -layoutSubviews as per instructions in documentation for | |
| 222 // +[MDCCollectionViewCell cr_preferredHeightForWidth:forItem:]. | |
| 223 - (void)layoutSubviews { | |
| 224 [super layoutSubviews]; | |
| 225 | |
| 226 // Adjust the text label preferredMaxLayoutWidth when the parent's width | |
| 227 // changes, for instance on screen rotation. | |
| 228 CGFloat parentWidth = CGRectGetWidth(self.contentView.bounds); | |
| 229 _subtitleLabel.preferredMaxLayoutWidth = parentWidth - kImageSize - 3 * 8; | |
| 230 _detailLabel.preferredMaxLayoutWidth = parentWidth; | |
| 231 | |
| 232 // Re-layout with the new preferred width to allow the label to adjust its | |
| 233 // height. | |
| 234 [super layoutSubviews]; | |
| 235 } | |
| 236 | |
| 237 @end | |
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Chromium Code Reviews
Issue 2761753002:
Cleanup ContentSuggestions cells (Closed)
