-
Notifications
You must be signed in to change notification settings - Fork 1.2k
/
NSCharacterSet+HTML.m
97 lines (70 loc) · 2.65 KB
/
NSCharacterSet+HTML.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
//
// NSCharacterSet+HTML.m
// CoreTextExtensions
//
// Created by Oliver Drobnik on 1/15/11.
// Copyright 2011 Drobnik.com. All rights reserved.
//
#import "NSCharacterSet+HTML.h"
#import "DTCoreTextConstants.h"
static NSCharacterSet *_tagNameCharacterSet = nil;
static NSCharacterSet *_ignorableWhitespaceCharacterSet = nil;
static NSCharacterSet *_tagAttributeNameCharacterSet = nil;
static NSCharacterSet *_quoteCharacterSet = nil;
static NSCharacterSet *_nonQuotedAttributeEndCharacterSet = nil;
static NSCharacterSet *_cssStyleAttributeNameCharacterSet = nil;
@implementation NSCharacterSet (HTML)
+ (NSCharacterSet *)tagNameCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
_tagNameCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"];
});
return _tagNameCharacterSet;
}
+ (NSCharacterSet *)tagAttributeNameCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
_tagAttributeNameCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@"-_:abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"];
});
return _tagAttributeNameCharacterSet;
}
+ (NSCharacterSet *)ignorableWhitespaceCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
NSMutableCharacterSet *tmpSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
[tmpSet removeCharactersInString:UNICODE_NON_BREAKING_SPACE];
_ignorableWhitespaceCharacterSet = [tmpSet copy];
});
return _ignorableWhitespaceCharacterSet;
}
+ (NSCharacterSet *)quoteCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
_quoteCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@"'\""];
});
return _quoteCharacterSet;
}
+ (NSCharacterSet *)nonQuotedAttributeEndCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
NSMutableCharacterSet *tmpCharacterSet = [NSMutableCharacterSet characterSetWithCharactersInString:@"/>"];
[tmpCharacterSet formUnionWithCharacterSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
_nonQuotedAttributeEndCharacterSet = [tmpCharacterSet copy];
});
return _nonQuotedAttributeEndCharacterSet;
}
// NOTE: cannot contain : because otherwise this messes up parsing of CSS style attributes
+ (NSCharacterSet *)cssStyleAttributeNameCharacterSet
{
static dispatch_once_t predicate;
dispatch_once(&predicate, ^{
_cssStyleAttributeNameCharacterSet = [NSCharacterSet characterSetWithCharactersInString:@"-_abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"];
});
return _cssStyleAttributeNameCharacterSet;
}
@end