-
Notifications
You must be signed in to change notification settings - Fork 49
/
PKURLState.m
219 lines (180 loc) · 4.8 KB
/
PKURLState.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
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
//
// PKURLState.m
// ParseKit
//
// Created by Todd Ditchendorf on 3/26/10.
// Copyright 2010 Todd Ditchendorf. All rights reserved.
//
#import <ParseKit/PKURLState.h>
#import <ParseKit/PKReader.h>
#import <ParseKit/PKTokenizer.h>
#import <ParseKit/PKToken.h>
#import <ParseKit/PKTypes.h>
// Gruber original
// \b(([\w-]+://?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|/)))
@interface PKToken ()
@property (nonatomic, readwrite) NSUInteger offset;
@end
@interface PKTokenizerState ()
- (void)resetWithReader:(PKReader *)r;
- (void)append:(PKUniChar)c;
- (NSString *)bufferedString;
- (PKTokenizerState *)nextTokenizerStateFor:(PKUniChar)c tokenizer:(PKTokenizer *)t;
@end
@interface PKURLState ()
- (BOOL)parseWWWFromReader:(PKReader *)r;
- (BOOL)parseSchemeFromReader:(PKReader *)r;
- (BOOL)parseHostFromReader:(PKReader *)r;
- (void)parsePathFromReader:(PKReader *)r;
@end
@implementation PKURLState
- (id)init {
if (self = [super init]) {
self.allowsWWWPrefix = YES;
}
return self;
}
- (void)dealloc {
[super dealloc];
}
- (void)append:(PKUniChar)ch {
lastChar = ch;
[super append:ch];
}
- (PKToken *)nextTokenFromReader:(PKReader *)r startingWith:(PKUniChar)cin tokenizer:(PKTokenizer *)t {
NSParameterAssert(r);
[self resetWithReader:r];
lastChar = PKEOF;
c = cin;
BOOL matched = NO;
if (allowsWWWPrefix && 'w' == c) {
matched = [self parseWWWFromReader:r];
if (!matched) {
[r unread:[[self bufferedString] length]];
[self resetWithReader:r];
c = cin;
}
}
if (!matched) {
matched = [self parseSchemeFromReader:r];
}
if (matched) {
matched = [self parseHostFromReader:r];
}
if (matched) {
[self parsePathFromReader:r];
}
NSString *s = [self bufferedString];
if (PKEOF != c) {
[r unread];
}
if (matched) {
if ('.' == lastChar || ',' == lastChar || '-' == lastChar) {
s = [s substringToIndex:[s length] - 1];
[r unread];
}
PKToken *tok = [PKToken tokenWithTokenType:PKTokenTypeURL stringValue:s floatValue:0.0];
tok.offset = offset;
return tok;
} else {
[r unread:[s length] - 1];
return [[self nextTokenizerStateFor:cin tokenizer:t] nextTokenFromReader:r startingWith:cin tokenizer:t];
}
}
- (BOOL)parseWWWFromReader:(PKReader *)r {
BOOL result = NO;
NSInteger wcount = 0;
while ('w' == c) {
wcount++;
[self append:c];
c = [r read];
if (3 == wcount) {
if ('.' == c) {
[self append:c];
c = [r read];
result = YES;
break;
} else {
result = NO;
break;
}
}
}
return result;
}
- (BOOL)parseSchemeFromReader:(PKReader *)r {
BOOL result = NO;
// [[:alpha:]-]+://?
for (;;) {
if (isalnum(c) || '-' == c) {
[self append:c];
} else if (':' == c) {
[self append:c];
c = [r read];
if ('/' == c) { // endgame
[self append:c];
c = [r read];
if ('/' == c) {
[self append:c];
c = [r read];
}
result = YES;
break;
} else {
result = NO;
break;
}
} else {
result = NO;
break;
}
c = [r read];
}
return result;
}
- (BOOL)parseHostFromReader:(PKReader *)r {
BOOL result = NO;
BOOL hasAtLeastOneChar = NO;
// BOOL hasDot = NO;
// ^[:space:]()<>
for (;;) {
if (PKEOF == c || isspace(c) || '(' == c || ')' == c || '<' == c || '>' == c) {
result = hasAtLeastOneChar;
break;
} else if ('/' == c && hasAtLeastOneChar/* && hasDot*/) {
result = YES;
break;
} else {
// if ('.' == c) {
// hasDot = YES;
// }
hasAtLeastOneChar = YES;
[self append:c];
c = [r read];
}
}
return result;
}
- (void)parsePathFromReader:(PKReader *)r {
BOOL hasOpenParen = NO;
for (;;) {
if (PKEOF == c || isspace(c) || '<' == c || '>' == c) {
break;
} else if (')' == c) {
if (hasOpenParen) {
hasOpenParen = NO;
[self append:c];
} else {
break;
}
} else {
if (!hasOpenParen) {
hasOpenParen = ('(' == c);
}
[self append:c];
}
c = [r read];
}
}
@synthesize allowsWWWPrefix;
@end