blob: 85a51d3f55a963561f1deb0fb8ccfc6f531f9123 (
plain)
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
|
/*
* Copyright 2013 Alex Merry <alex.merry@kdemail.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#import "NSString+Tikz.h"
#import "TikzGraphAssembler.h"
@implementation NSString (Tikz)
- (NSString*) tikzEscapedString {
static NSCharacterSet *avoid = nil;
if (avoid == nil)
avoid = [[[NSCharacterSet characterSetWithCharactersInString:@"abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ<>-'0123456789. "] invertedSet] retain];
if ([self rangeOfCharacterFromSet:avoid].length > 0) {
return [NSString stringWithFormat:@"{%@}", self];
} else {
return [[self retain] autorelease];
}
}
- (BOOL) isValidTikz {
NSUInteger length = [self length];
unsigned int brace_depth = 0;
unsigned int escape = 0;
for (NSUInteger i = 0; i < length; ++i) {
unichar c = [self characterAtIndex:i];
if (escape) {
escape = 0;
} else if (c == '\\') {
escape = 1;
} else if (c == '{') {
brace_depth++;
} else if (c == '}') {
if (brace_depth == 0)
return NO;
brace_depth--;
}
}
return !escape && brace_depth == 0;
}
@end
// vi:ft=objc:noet:ts=4:sts=4:sw=4
|