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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_article_i
tem.h" | |
| 6 | |
| 7 #include "base/time/time.h" | |
| 8 #import "ios/chrome/browser/ui/colors/MDCPalette+CrAdditions.h" | |
| 9 #import "ios/chrome/browser/ui/uikit_ui_util.h" | |
| 10 #import "ios/chrome/browser/ui/util/i18n_string.h" | |
| 11 #import "ios/third_party/material_components_ios/src/components/Typography/src/M
aterialTypography.h" | |
| 12 | |
| 13 #if !defined(__has_feature) || !__has_feature(objc_arc) | |
| 14 #error "This file requires ARC support." | |
| 15 #endif | |
| 16 | |
| 17 namespace { | |
| 18 const CGFloat kImageSize = 72; | |
| 19 // When updating this, make sure to update |layoutSubviews|. | |
| 20 const CGFloat kStandardSpacing = 8; | |
| 21 } | |
| 22 | |
| 23 @interface ContentSuggestionsArticleItem () | |
| 24 | |
| 25 @property(nonatomic, copy) NSString* subtitle; | |
| 26 // Used to check if the image has already been fetched. There is no way to | |
| 27 // discriminate between failed image download and nonexitent image. The article | |
| 28 // tries to download the image only once. | |
| 29 @property(nonatomic, assign) BOOL imageFetched; | |
| 30 | |
| 31 @end | |
| 32 | |
| 33 #pragma mark - ContentSuggestionsArticleItem | |
| 34 | |
| 35 @implementation ContentSuggestionsArticleItem | |
| 36 | |
| 37 @synthesize title = _title; | |
| 38 @synthesize subtitle = _subtitle; | |
| 39 @synthesize image = _image; | |
| 40 @synthesize articleURL = _articleURL; | |
| 41 @synthesize publisher = _publisher; | |
| 42 @synthesize publishDate = _publishDate; | |
| 43 @synthesize suggestionIdentifier = _suggestionIdentifier; | |
| 44 @synthesize delegate = _delegate; | |
| 45 @synthesize imageFetched = _imageFetched; | |
| 46 | |
| 47 - (instancetype)initWithType:(NSInteger)type | |
| 48 title:(NSString*)title | |
| 49 subtitle:(NSString*)subtitle | |
| 50 delegate:(id<ContentSuggestionsArticleItemDelegate>)delegate | |
| 51 url:(const GURL&)url { | |
| 52 self = [super initWithType:type]; | |
| 53 if (self) { | |
| 54 self.cellClass = [ContentSuggestionsArticleCell class]; | |
| 55 _title = [title copy]; | |
| 56 _subtitle = [subtitle copy]; | |
| 57 _articleURL = url; | |
| 58 _delegate = delegate; | |
| 59 _image = [self emptyImageBackground]; | |
| 60 } | |
| 61 return self; | |
| 62 } | |
| 63 | |
| 64 - (void)configureCell:(ContentSuggestionsArticleCell*)cell { | |
| 65 [super configureCell:cell]; | |
| 66 if (!self.imageFetched) { | |
| 67 self.imageFetched = YES; | |
| 68 // Fetch the image. During the fetch the cell's image should still be set. | |
| 69 [self.delegate loadImageForArticleItem:self]; | |
| 70 } | |
| 71 cell.titleLabel.text = self.title; | |
| 72 cell.subtitleLabel.text = self.subtitle; | |
| 73 cell.imageView.image = self.image; | |
| 74 [cell setPublisherName:self.publisher date:self.publishDate]; | |
| 75 } | |
| 76 | |
| 77 #pragma mark - Private | |
| 78 | |
| 79 - (UIImage*)emptyImageBackground { | |
| 80 // TODO(crbug.com/698171): Remove this function once we have real background | |
| 81 // image. | |
| 82 UIColor* color = [UIColor lightGrayColor]; | |
| 83 CGRect rect = CGRectMake(0, 0, 1, 1); | |
| 84 UIGraphicsBeginImageContext(rect.size); | |
| 85 [color setFill]; | |
| 86 UIRectFill(rect); | |
| 87 UIImage* image = UIGraphicsGetImageFromCurrentImageContext(); | |
| 88 UIGraphicsEndImageContext(); | |
| 89 return image; | |
| 90 } | |
| 91 | |
| 92 @end | |
| 93 | |
| 94 #pragma mark - ContentSuggestionsArticleCell | |
| 95 | |
| 96 @interface ContentSuggestionsArticleCell () | |
| 97 | |
| 98 @property(nonatomic, strong) UILabel* publisherLabel; | |
| 99 | |
| 100 // Applies the constraints on the elements. Called in the init. | |
| 101 - (void)applyConstraints; | |
| 102 | |
| 103 @end | |
| 104 | |
| 105 @implementation ContentSuggestionsArticleCell | |
| 106 | |
| 107 @synthesize titleLabel = _titleLabel; | |
| 108 @synthesize subtitleLabel = _subtitleLabel; | |
| 109 @synthesize imageView = _imageView; | |
| 110 @synthesize publisherLabel = _publisherLabel; | |
| 111 | |
| 112 - (instancetype)initWithFrame:(CGRect)frame { | |
| 113 self = [super initWithFrame:frame]; | |
| 114 if (self) { | |
| 115 _titleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 116 _subtitleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 117 _imageView = [[UIImageView alloc] initWithFrame:CGRectZero]; | |
| 118 _publisherLabel = [[UILabel alloc] initWithFrame:CGRectZero]; | |
| 119 | |
| 120 _titleLabel.numberOfLines = 2; | |
| 121 _subtitleLabel.numberOfLines = 0; | |
| 122 [_subtitleLabel setContentHuggingPriority:UILayoutPriorityDefaultHigh | |
| 123 forAxis:UILayoutConstraintAxisVertical]; | |
| 124 [_titleLabel setContentHuggingPriority:UILayoutPriorityDefaultHigh | |
| 125 forAxis:UILayoutConstraintAxisVertical]; | |
| 126 _imageView.contentMode = UIViewContentModeScaleAspectFill; | |
| 127 _imageView.clipsToBounds = YES; | |
| 128 | |
| 129 _imageView.translatesAutoresizingMaskIntoConstraints = NO; | |
| 130 _titleLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 131 _subtitleLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 132 _publisherLabel.translatesAutoresizingMaskIntoConstraints = NO; | |
| 133 | |
| 134 [self.contentView addSubview:_imageView]; | |
| 135 [self.contentView addSubview:_titleLabel]; | |
| 136 [self.contentView addSubview:_subtitleLabel]; | |
| 137 [self.contentView addSubview:_publisherLabel]; | |
| 138 | |
| 139 _titleLabel.font = [MDCTypography subheadFont]; | |
| 140 _subtitleLabel.font = [MDCTypography body1Font]; | |
| 141 _publisherLabel.font = [MDCTypography captionFont]; | |
| 142 | |
| 143 _subtitleLabel.textColor = [[MDCPalette greyPalette] tint700]; | |
| 144 _publisherLabel.textColor = [[MDCPalette greyPalette] tint700]; | |
| 145 | |
| 146 [self applyConstraints]; | |
| 147 } | |
| 148 return self; | |
| 149 } | |
| 150 | |
| 151 - (void)setPublisherName:(NSString*)publisherName date:(base::Time)publishDate { | |
| 152 NSDate* date = [NSDate dateWithTimeIntervalSince1970:publishDate.ToDoubleT()]; | |
| 153 NSString* dateString = | |
| 154 [NSDateFormatter localizedStringFromDate:date | |
| 155 dateStyle:NSDateFormatterMediumStyle | |
| 156 timeStyle:NSDateFormatterNoStyle]; | |
| 157 | |
| 158 self.publisherLabel.text = AdjustStringForLocaleDirection( | |
| 159 [NSString stringWithFormat:@"%@ - %@.", publisherName, dateString]); | |
| 160 } | |
| 161 | |
| 162 #pragma mark - UIView | |
| 163 | |
| 164 // Implements -layoutSubviews as per instructions in documentation for | |
| 165 // +[MDCCollectionViewCell cr_preferredHeightForWidth:forItem:]. | |
| 166 - (void)layoutSubviews { | |
| 167 [super layoutSubviews]; | |
| 168 | |
| 169 // Adjust the text label preferredMaxLayoutWidth when the parent's width | |
| 170 // changes, for instance on screen rotation. | |
| 171 CGFloat parentWidth = CGRectGetWidth(self.contentView.bounds); | |
| 172 | |
| 173 self.titleLabel.preferredMaxLayoutWidth = | |
| 174 parentWidth - kImageSize - 3 * kStandardSpacing; | |
| 175 self.subtitleLabel.preferredMaxLayoutWidth = | |
| 176 parentWidth - kImageSize - 3 * kStandardSpacing; | |
| 177 | |
| 178 // Re-layout with the new preferred width to allow the label to adjust its | |
| 179 // height. | |
| 180 [super layoutSubviews]; | |
| 181 } | |
| 182 | |
| 183 #pragma mark - Private | |
| 184 | |
| 185 - (void)applyConstraints { | |
| 186 [NSLayoutConstraint activateConstraints:@[ | |
| 187 [_imageView.widthAnchor constraintEqualToConstant:kImageSize], | |
| 188 [_imageView.heightAnchor constraintEqualToAnchor:_imageView.widthAnchor], | |
| 189 [_publisherLabel.topAnchor | |
| 190 constraintGreaterThanOrEqualToAnchor:_imageView.bottomAnchor | |
| 191 constant:kStandardSpacing], | |
| 192 [_publisherLabel.topAnchor | |
| 193 constraintGreaterThanOrEqualToAnchor:_subtitleLabel.bottomAnchor | |
| 194 constant:kStandardSpacing], | |
| 195 ]]; | |
| 196 | |
| 197 ApplyVisualConstraintsWithMetrics( | |
| 198 @[ | |
| 199 @"H:|-(space)-[title]-(space)-[image]-(space)-|", | |
| 200 @"H:|-(space)-[text]-(space)-[image]", | |
| 201 @"V:|-[title]-[text]", | |
| 202 @"V:|-[image]", | |
| 203 @"H:|-[publish]-|", | |
| 204 @"V:[publish]-|", | |
| 205 ], | |
| 206 @{ | |
| 207 @"image" : _imageView, | |
| 208 @"title" : _titleLabel, | |
| 209 @"text" : _subtitleLabel, | |
| 210 @"publish" : _publisherLabel, | |
| 211 }, | |
| 212 @{ @"space" : @(kStandardSpacing) }); | |
| 213 } | |
| 214 | |
| 215 @end | |
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Chromium Code Reviews
Issue 2761753002:
Cleanup ContentSuggestions cells (Closed)
