From 0f2452356ae718b73e9467e388092c8af6752a8f Mon Sep 17 00:00:00 2001 From: Alex Merry Date: Mon, 4 Feb 2013 17:29:37 +0000 Subject: {-quote keys as well as values in property lists --- tikzit/src/common/NSString+Tikz.m | 59 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 tikzit/src/common/NSString+Tikz.m (limited to 'tikzit/src/common/NSString+Tikz.m') diff --git a/tikzit/src/common/NSString+Tikz.m b/tikzit/src/common/NSString+Tikz.m new file mode 100644 index 0000000..85a51d3 --- /dev/null +++ b/tikzit/src/common/NSString+Tikz.m @@ -0,0 +1,59 @@ +/* + * Copyright 2013 Alex Merry + * + * 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 . + */ + +#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 -- cgit v1.2.3