/
AttributedTableViewCell.m
180 lines (143 loc) · 8.64 KB
/
AttributedTableViewCell.m
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
// AttributedTableViewCell.m
//
// Copyright (c) 2011 Mattt Thompson (http://mattt.me)
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
#import <QuartzCore/QuartzCore.h>
#import "AttributedTableViewCell.h"
#import "TTTAttributedLabel.h"
static CGFloat const kEspressoDescriptionTextFontSize = 17;
static inline NSRegularExpression * NameRegularExpression() {
static NSRegularExpression *_nameRegularExpression = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_nameRegularExpression = [[NSRegularExpression alloc] initWithPattern:@"^\\w+" options:NSRegularExpressionCaseInsensitive error:nil];
});
return _nameRegularExpression;
}
static inline NSRegularExpression * ParenthesisRegularExpression() {
static NSRegularExpression *_parenthesisRegularExpression = nil;
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
_parenthesisRegularExpression = [[NSRegularExpression alloc] initWithPattern:@"\\([^\\(\\)]+\\)" options:NSRegularExpressionCaseInsensitive error:nil];
});
return _parenthesisRegularExpression;
}
@implementation AttributedTableViewCell
@synthesize summaryText = _summaryText;
@synthesize summaryLabel = _summaryLabel;
- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (!self) {
return nil;
}
self.layer.shouldRasterize = YES;
self.layer.rasterizationScale = [[UIScreen mainScreen] scale];
self.summaryLabel = [[TTTAttributedLabel alloc] initWithFrame:CGRectZero];
self.summaryLabel.font = [UIFont systemFontOfSize:kEspressoDescriptionTextFontSize];
self.summaryLabel.textColor = [UIColor darkGrayColor];
self.summaryLabel.lineBreakMode = UILineBreakModeWordWrap;
self.summaryLabel.numberOfLines = 0;
self.summaryLabel.linkAttributes = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:YES] forKey:(__bridge NSString *)kCTUnderlineStyleAttributeName];
NSMutableDictionary *mutableActiveLinkAttributes = [NSMutableDictionary dictionary];
[mutableActiveLinkAttributes setValue:[NSNumber numberWithBool:NO] forKey:(NSString *)kCTUnderlineStyleAttributeName];
[mutableActiveLinkAttributes setValue:(__bridge id)[[UIColor redColor] CGColor] forKey:(NSString *)kCTForegroundColorAttributeName];
[mutableActiveLinkAttributes setValue:(__bridge id)[[UIColor colorWithRed:1.0f green:0.0f blue:0.0f alpha:0.1f] CGColor] forKey:(NSString *)kTTTBackgroundFillColorAttributeName];
[mutableActiveLinkAttributes setValue:(__bridge id)[[UIColor colorWithRed:1.0f green:0.0f blue:0.0f alpha:0.25f] CGColor] forKey:(NSString *)kTTTBackgroundStrokeColorAttributeName];
[mutableActiveLinkAttributes setValue:[NSNumber numberWithFloat:1.0f] forKey:(NSString *)kTTTBackgroundLineWidthAttributeName];
[mutableActiveLinkAttributes setValue:[NSNumber numberWithFloat:5.0f] forKey:(NSString *)kTTTBackgroundCornerRadiusAttributeName];
self.summaryLabel.activeLinkAttributes = mutableActiveLinkAttributes;
self.summaryLabel.highlightedTextColor = [UIColor whiteColor];
self.summaryLabel.shadowColor = [UIColor colorWithWhite:0.87f alpha:1.0f];
self.summaryLabel.shadowOffset = CGSizeMake(0.0f, 1.0f);
self.summaryLabel.highlightedShadowColor = [UIColor colorWithWhite:0.0f alpha:0.25f];
self.summaryLabel.highlightedShadowOffset = CGSizeMake(0.0f, -1.0f);
self.summaryLabel.highlightedShadowRadius = 1;
self.summaryLabel.verticalAlignment = TTTAttributedLabelVerticalAlignmentTop;
[self.contentView addSubview:self.summaryLabel];
self.isAccessibilityElement = NO;
return self;
}
- (void)setSummaryText:(NSString *)text {
_summaryText = [text copy];
}
- (void)drawRect:(CGRect)rect {
[super drawRect:rect];
[self.summaryLabel setText:self.summaryText afterInheritingLabelAttributesAndConfiguringWithBlock:^NSMutableAttributedString *(NSMutableAttributedString *mutableAttributedString) {
NSRange stringRange = NSMakeRange(0, [mutableAttributedString length]);
NSRegularExpression *regexp = NameRegularExpression();
NSRange nameRange = [regexp rangeOfFirstMatchInString:[mutableAttributedString string] options:0 range:stringRange];
UIFont *boldSystemFont = [UIFont boldSystemFontOfSize:kEspressoDescriptionTextFontSize];
CTFontRef boldFont = CTFontCreateWithName((__bridge CFStringRef)boldSystemFont.fontName, boldSystemFont.pointSize, NULL);
if (boldFont) {
[mutableAttributedString removeAttribute:(__bridge NSString *)kCTFontAttributeName range:nameRange];
[mutableAttributedString addAttribute:(__bridge NSString *)kCTFontAttributeName value:(__bridge id)boldFont range:nameRange];
CFRelease(boldFont);
}
[mutableAttributedString replaceCharactersInRange:nameRange withString:[[[mutableAttributedString string] substringWithRange:nameRange] uppercaseString]];
regexp = ParenthesisRegularExpression();
[regexp enumerateMatchesInString:[mutableAttributedString string] options:0 range:stringRange usingBlock:^(NSTextCheckingResult *result, __unused NSMatchingFlags flags, __unused BOOL *stop) {
UIFont *italicSystemFont = [UIFont italicSystemFontOfSize:kEspressoDescriptionTextFontSize];
CTFontRef italicFont = CTFontCreateWithName((__bridge CFStringRef)italicSystemFont.fontName, italicSystemFont.pointSize, NULL);
if (italicFont) {
[mutableAttributedString removeAttribute:(NSString *)kCTFontAttributeName range:result.range];
[mutableAttributedString addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)italicFont range:result.range];
CFRelease(italicFont);
[mutableAttributedString removeAttribute:(NSString *)kCTForegroundColorAttributeName range:result.range];
[mutableAttributedString addAttribute:(NSString *)kCTForegroundColorAttributeName value:(__bridge id)[[UIColor grayColor] CGColor] range:result.range];
}
}];
return mutableAttributedString;
}];
NSRegularExpression *regexp = NameRegularExpression();
NSRange linkRange = [regexp rangeOfFirstMatchInString:self.summaryText options:0 range:NSMakeRange(0, [self.summaryText length])];
NSURL *url = [NSURL URLWithString:[NSString stringWithFormat:@"http://en.wikipedia.org/wiki/%@", [self.summaryText substringWithRange:linkRange]]];
[self.summaryLabel addLinkToURL:url withRange:linkRange];
[self.summaryLabel setNeedsDisplay];
}
+ (CGFloat)heightForCellWithText:(NSString *)text {
static CGFloat padding = 10.0;
UIFont *systemFont = [UIFont systemFontOfSize:kEspressoDescriptionTextFontSize];
CGSize textSize = CGSizeMake(275.0, CGFLOAT_MAX);
CGSize sizeWithFont = [text sizeWithFont:systemFont constrainedToSize:textSize lineBreakMode:NSLineBreakByWordWrapping];
#if defined(__LP64__) && __LP64__
return ceil(sizeWithFont.height) + padding;
#else
return ceilf(sizeWithFont.height) + padding;
#endif
}
#pragma mark - UIView
- (void)layoutSubviews {
[super layoutSubviews];
self.textLabel.hidden = YES;
self.detailTextLabel.hidden = YES;
self.summaryLabel.frame = CGRectOffset(CGRectInset(self.bounds, 20.0f, 5.0f), -10.0f, 0.0f);
[self setNeedsDisplay];
}
#pragma mark - UIAccessibilityContainer
- (NSInteger)accessibilityElementCount {
return 1;
}
- (id)accessibilityElementAtIndex:(__unused NSInteger)index {
return self.summaryLabel;
}
- (NSInteger)indexOfAccessibilityElement:(__unused id)element {
return 0;
}
@end