diff options
Diffstat (limited to 'src/common/NSString+LatexConstants.m')
| -rw-r--r-- | src/common/NSString+LatexConstants.m | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/src/common/NSString+LatexConstants.m b/src/common/NSString+LatexConstants.m new file mode 100644 index 0000000..1114d40 --- /dev/null +++ b/src/common/NSString+LatexConstants.m @@ -0,0 +1,204 @@ +// +// NSString+LatexConstants.m +// TikZiT +// +// Copyright 2010 Aleks Kissinger. All rights reserved. +// +// +// This file is part of TikZiT. +// +// TikZiT 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 3 of the License, or +// (at your option) any later version. +// +// TikZiT 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 TikZiT. If not, see <http://www.gnu.org/licenses/>. +// + +#import "NSString+LatexConstants.h" + +// can't use sizeof() in non-fragile ABI (eg: clang) +#define texConstantCount 62 +static NSString *texConstantNames[texConstantCount] = { + @"alpha", + @"beta", + @"gamma", + @"delta", + @"epsilon", + @"zeta", + @"eta", + @"theta", + @"iota", + @"kappa", + @"lambda", + @"mu", + @"nu", + @"xi", + @"pi", + @"rho", + @"sigma", + @"tau", + @"upsilon", + @"phi", + @"chi", + @"psi", + @"omega", + @"Gamma", + @"Delta", + @"Theta", + @"Lambda", + @"Xi", + @"Pi", + @"Sigma", + @"Upsilon", + @"Phi", + @"Psi", + @"Omega", + + @"pm", + @"to", + @"Rightarrow", + @"Leftrightarrow", + @"forall", + @"partial", + @"exists", + @"emptyset", + @"nabla", + @"in", + @"notin", + @"prod", + @"sum", + @"surd", + @"infty", + @"wedge", + @"vee", + @"cap", + @"cup", + @"int", + @"approx", + @"neq", + @"equiv", + @"leq", + @"geq", + @"subset", + @"supset", + @"cdot" +}; + +static char * texConstantCodes[texConstantCount] = { + "\u03b1","\u03b2","\u03b3","\u03b4","\u03b5","\u03b6","\u03b7", + "\u03b8","\u03b9","\u03ba","\u03bb","\u03bc","\u03bd","\u03be", + "\u03c0","\u03c1","\u03c3","\u03c4","\u03c5","\u03c6","\u03c7", + "\u03c8","\u03c9","\u0393","\u0394","\u0398","\u039b","\u039e", + "\u03a0","\u03a3","\u03a5","\u03a6","\u03a8","\u03a9", + + "\u00b1","\u2192","\u21d2","\u21d4","\u2200","\u2202","\u2203", + "\u2205","\u2207","\u2208","\u2209","\u220f","\u2211","\u221a", + "\u221e","\u2227","\u2228","\u2229","\u222a","\u222b","\u2248", + "\u2260","\u2261","\u2264","\u2265","\u2282","\u2283","\u22c5" +}; + +#define texModifierCount 10 +static NSString *texModifierNames[texModifierCount] = { + @"tiny", + @"scriptsize", + @"footnotesize", + @"small", + @"normalsize", + @"large", + @"Large", + @"LARGE", + @"huge", + @"Huge" +}; + +static NSDictionary *texConstants = nil; +static NSSet *texModifiers = nil; + +@implementation NSString(LatexConstants) + +- (NSString*)stringByExpandingLatexConstants { + + if (texConstants == nil) { + NSMutableDictionary *constants = [[NSMutableDictionary alloc] initWithCapacity:texConstantCount]; + for (int i = 0; i < texConstantCount; ++i) { + [constants setObject:[NSString stringWithUTF8String:texConstantCodes[i]] forKey:texConstantNames[i]]; + } + texConstants = constants; + } + if (texModifiers == nil) { + texModifiers = [[NSSet alloc] initWithObjects:texModifierNames count:texModifierCount]; + } + + NSMutableString *buf = [[NSMutableString alloc] initWithCapacity:[self length]]; + NSMutableString *wordBuf = [[NSMutableString alloc] initWithCapacity:10]; + + unichar c_a = [@"a" characterAtIndex:0]; + unichar c_z = [@"z" characterAtIndex:0]; + unichar c_A = [@"A" characterAtIndex:0]; + unichar c_Z = [@"Z" characterAtIndex:0]; + + int state = 0; + // a tiny little DFA to replace \\([\w*]) with unicode of $1 + unichar c; + NSString *code; + int i; + for (i = 0; i<[self length]; ++i) { + c = [self characterAtIndex:i]; + switch (state) { + case 0: + if (c=='\\') { + state = 1; + } else { + [buf appendFormat:@"%C", c]; + } + break; + case 1: + if ((c>=c_a && c<=c_z) || (c>=c_A && c<=c_Z)) { + [wordBuf appendFormat:@"%C", c]; + } else { + code = [texConstants objectForKey:wordBuf]; + if (code != nil) { + [buf appendString:code]; + } else if (![texModifiers containsObject:wordBuf]) { + [buf appendFormat:@"\\%@", wordBuf]; + } + + [wordBuf setString:@""]; + if (c=='\\') { + state = 1; + } else { + [buf appendFormat:@"%C", c]; + state = 0; + } + + } + break; + } + } + + if (state == 1) { + code = [texConstants objectForKey:wordBuf]; + if (code != nil) { + [buf appendString:code]; + } else if (![texModifiers containsObject:wordBuf]) { + [buf appendFormat:@"\\%@", wordBuf]; + } + } + + NSString *ret = [buf copy]; + [buf release]; + [wordBuf release]; + + return [ret autorelease]; +} + +@end + +// vi:ft=objc:ts=4:noet:sts=4:sw=4 |