/
EntityReference.m
335 lines (324 loc) · 21.4 KB
/
EntityReference.m
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//
// EntityReference.m
// DreamCatcher
//
// Created by James Howard on 8/21/05.
// Copyright 2005 __MyCompanyName__. All rights reserved.
//
#import "EntityReference.h"
static NSDictionary* namesToCodes = nil;
@interface EntityReference (private)
+ (NSDictionary*)namesToCodes;
@end
@implementation EntityReference
+ (NSString*)entityToString: (NSString*)htmlEntityReference
{
// there are no correct entity references of length < 4
if([htmlEntityReference length] < 4) return @"";
// try to look up the code in the table if it isn't a direct # type reference
if([htmlEntityReference characterAtIndex: 1] != '#') {
htmlEntityReference = [[EntityReference namesToCodes] objectForKey: htmlEntityReference];
if(htmlEntityReference == nil) return @"";
if([htmlEntityReference length] < 4 || [htmlEntityReference characterAtIndex: 1] != '#') {
NSLog(@"Something might be wrong with the html entity reference table for %@", htmlEntityReference);
return @"";
}
}
NSString* characterPart = [htmlEntityReference substringWithRange:
NSMakeRange(2, [htmlEntityReference length] - 3)];
int number = [characterPart intValue];
if(number == 0) return @"";
NSString* ret = [NSString stringWithFormat: @"%C", number];
if(ret == nil) return @"";
return ret;
}
+ (NSDictionary*)namesToCodes
{
// NOTE: you can generate these lists, ready to feed into NSDictionary,
// with the following regexes in bbedit:
// 1) Convert make each reference comment be on a single line:
// s/\r\s*[^<]//g
// 2) Extract out relevant info and format it for NSDictionary:
// s/.*ENTITY\s+(\w+)\s+CDATA\s+"(.*?)"\s+\-\-\s+(.*?)\s+\-\-\>.*/@"\2",\t@"\&\1;",\t// \3/g
// You can find the lists of character entities at the w3:
// http://www.w3.org/TR/REC-html40/sgml/entities.html
if(namesToCodes == nil) {
namesToCodes = [[NSDictionary alloc]
initWithObjectsAndKeys:
// 24.2 Character entity references for ISO 8859-1 characters
@" ", @" ", // no-break space = non-breaking space, U+00A0 ISOnum
@"¡", @"¡", // inverted exclamation mark, U+00A1 ISOnum
@"¢", @"¢", // cent sign, U+00A2 ISOnum
@"£", @"£", // pound sign, U+00A3 ISOnum
@"¤", @"¤", // currency sign, U+00A4 ISOnum
@"¥", @"¥", // yen sign = yuan sign, U+00A5 ISOnum
@"¦", @"¦", // broken bar = broken vertical bar, U+00A6 ISOnum
@"§", @"§", // section sign, U+00A7 ISOnum
@"¨", @"¨", // diaeresis = spacing diaeresis, U+00A8 ISOdia
@"©", @"©", // copyright sign, U+00A9 ISOnum
@"ª", @"ª", // feminine ordinal indicator, U+00AA ISOnum
@"«", @"«", // left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum
@"¬", @"¬", // not sign, U+00AC ISOnum
@"­", @"­", // soft hyphen = discretionary hyphen, U+00AD ISOnum
@"®", @"®", // registered sign = registered trade mark sign,+00AE ISOnum
@"¯", @"¯", // macron = spacing macron = overline APL overbar, U+00AF ISOdia
@"°", @"°", // degree sign, U+00B0 ISOnum
@"±", @"±", // plus-minus sign = plus-or-minus sign,+00B1 ISOnum
@"²", @"²", // superscript two = superscript digit two squared, U+00B2 ISOnum
@"³", @"³", // superscript three = superscript digit three cubed, U+00B3 ISOnum
@"´", @"´", // acute accent = spacing acute,+00B4 ISOdia
@"µ", @"µ", // micro sign, U+00B5 ISOnum
@"¶", @"¶", // pilcrow sign = paragraph sign,+00B6 ISOnum
@"·", @"·", // middle dot = Georgian comma Greek middle dot, U+00B7 ISOnum
@"¸", @"¸", // cedilla = spacing cedilla, U+00B8 ISOdia
@"¹", @"¹", // superscript one = superscript digit one,+00B9 ISOnum
@"º", @"º", // masculine ordinal indicator,+00BA ISOnum
@"»", @"»", // right-pointing double angle quotation mark right pointing guillemet, U+00BB ISOnum
@"¼", @"¼", // vulgar fraction one quarter fraction one quarter, U+00BC ISOnum
@"½", @"½", // vulgar fraction one half fraction one half, U+00BD ISOnum
@"¾", @"¾", // vulgar fraction three quarters fraction three quarters, U+00BE ISOnum
@"¿", @"¿", // inverted question mark turned question mark, U+00BF ISOnum
@"À", @"À", // latin capital letter A with grave latin capital letter A grave,+00C0 ISOlat1
@"Á", @"Á", // latin capital letter A with acute,+00C1 ISOlat1
@"Â", @"Â", // latin capital letter A with circumflex,+00C2 ISOlat1
@"Ã", @"Ã", // latin capital letter A with tilde,+00C3 ISOlat1
@"Ä", @"Ä", // latin capital letter A with diaeresis,+00C4 ISOlat1
@"Å", @"Å", // latin capital letter A with ring above latin capital letter A ring,+00C5 ISOlat1
@"Æ", @"Æ", // latin capital letter AE latin capital ligature AE,+00C6 ISOlat1
@"Ç", @"Ç", // latin capital letter C with cedilla,+00C7 ISOlat1
@"È", @"È", // latin capital letter E with grave,+00C8 ISOlat1
@"É", @"É", // latin capital letter E with acute,+00C9 ISOlat1
@"Ê", @"Ê", // latin capital letter E with circumflex,+00CA ISOlat1
@"Ë", @"Ë", // latin capital letter E with diaeresis,+00CB ISOlat1
@"Ì", @"Ì", // latin capital letter I with grave,+00CC ISOlat1
@"Í", @"Í", // latin capital letter I with acute,+00CD ISOlat1
@"Î", @"Î", // latin capital letter I with circumflex,+00CE ISOlat1
@"Ï", @"Ï", // latin capital letter I with diaeresis,+00CF ISOlat1
@"Ð", @"Ð", // latin capital letter ETH, U+00D0 ISOlat1
@"Ñ", @"Ñ", // latin capital letter N with tilde,+00D1 ISOlat1
@"Ò", @"Ò", // latin capital letter O with grave,+00D2 ISOlat1
@"Ó", @"Ó", // latin capital letter O with acute,+00D3 ISOlat1
@"Ô", @"Ô", // latin capital letter O with circumflex,+00D4 ISOlat1
@"Õ", @"Õ", // latin capital letter O with tilde,+00D5 ISOlat1
@"Ö", @"Ö", // latin capital letter O with diaeresis,+00D6 ISOlat1
@"×", @"×", // multiplication sign, U+00D7 ISOnum
@"Ø", @"Ø", // latin capital letter O with stroke latin capital letter O slash,+00D8 ISOlat1
@"Ù", @"Ù", // latin capital letter U with grave,+00D9 ISOlat1
@"Ú", @"Ú", // latin capital letter U with acute,+00DA ISOlat1
@"Û", @"Û", // latin capital letter U with circumflex,+00DB ISOlat1
@"Ü", @"Ü", // latin capital letter U with diaeresis,+00DC ISOlat1
@"Ý", @"Ý", // latin capital letter Y with acute,+00DD ISOlat1
@"Þ", @"Þ", // latin capital letter THORN,+00DE ISOlat1
@"ß", @"ß", // latin small letter sharp s = ess-zed,+00DF ISOlat1
@"à", @"à", // latin small letter a with grave latin small letter a grave,+00E0 ISOlat1
@"á", @"á", // latin small letter a with acute,+00E1 ISOlat1
@"â", @"â", // latin small letter a with circumflex,+00E2 ISOlat1
@"ã", @"ã", // latin small letter a with tilde,+00E3 ISOlat1
@"ä", @"ä", // latin small letter a with diaeresis,+00E4 ISOlat1
@"å", @"å", // latin small letter a with ring above latin small letter a ring,+00E5 ISOlat1
@"æ", @"æ", // latin small letter ae latin small ligature ae, U+00E6 ISOlat1
@"ç", @"ç", // latin small letter c with cedilla,+00E7 ISOlat1
@"è", @"è", // latin small letter e with grave,+00E8 ISOlat1
@"é", @"é", // latin small letter e with acute,+00E9 ISOlat1
@"ê", @"ê", // latin small letter e with circumflex,+00EA ISOlat1
@"ë", @"ë", // latin small letter e with diaeresis,+00EB ISOlat1
@"ì", @"ì", // latin small letter i with grave,+00EC ISOlat1
@"í", @"í", // latin small letter i with acute,+00ED ISOlat1
@"î", @"î", // latin small letter i with circumflex,+00EE ISOlat1
@"ï", @"ï", // latin small letter i with diaeresis,+00EF ISOlat1
@"ð", @"ð", // latin small letter eth, U+00F0 ISOlat1
@"ñ", @"ñ", // latin small letter n with tilde,+00F1 ISOlat1
@"ò", @"ò", // latin small letter o with grave,+00F2 ISOlat1
@"ó", @"ó", // latin small letter o with acute,+00F3 ISOlat1
@"ô", @"ô", // latin small letter o with circumflex,+00F4 ISOlat1
@"õ", @"õ", // latin small letter o with tilde,+00F5 ISOlat1
@"ö", @"ö", // latin small letter o with diaeresis,+00F6 ISOlat1
@"÷", @"÷", // division sign, U+00F7 ISOnum
@"ø", @"ø", // latin small letter o with stroke, latin small letter o slash,+00F8 ISOlat1
@"ù", @"ù", // latin small letter u with grave,+00F9 ISOlat1
@"ú", @"ú", // latin small letter u with acute,+00FA ISOlat1
@"û", @"û", // latin small letter u with circumflex,+00FB ISOlat1
@"ü", @"ü", // latin small letter u with diaeresis,+00FC ISOlat1
@"ý", @"ý", // latin small letter y with acute,+00FD ISOlat1
@"þ", @"þ", // latin small letter thorn,+00FE ISOlat1
@"ÿ", @"ÿ", // latin small letter y with diaeresis,+00FF ISOlat1
// 24.3 Character entity references for symbols, mathematical symbols, and Greek letters
@"ƒ", @"ƒ", // latin small f with hook = function florin, U+0192 ISOtech
@"Α", @"Α", // greek capital letter alpha, U+0391
@"Β", @"Β", // greek capital letter beta, U+0392
@"Γ", @"Γ", // greek capital letter gamma,+0393 ISOgrk3
@"Δ", @"Δ", // greek capital letter delta,+0394 ISOgrk3
@"Ε", @"Ε", // greek capital letter epsilon, U+0395
@"Ζ", @"Ζ", // greek capital letter zeta, U+0396
@"Η", @"Η", // greek capital letter eta, U+0397
@"Θ", @"Θ", // greek capital letter theta,+0398 ISOgrk3
@"Ι", @"Ι", // greek capital letter iota, U+0399
@"Κ", @"Κ", // greek capital letter kappa, U+039A
@"Λ", @"Λ", // greek capital letter lambda,+039B ISOgrk3
@"Μ", @"Μ", // greek capital letter mu, U+039C
@"Ν", @"Ν", // greek capital letter nu, U+039D
@"Ξ", @"Ξ", // greek capital letter xi, U+039E ISOgrk3
@"Ο", @"Ο", // greek capital letter omicron, U+039F
@"Π", @"Π", // greek capital letter pi, U+03A0 ISOgrk3
@"Ρ", @"Ρ", // greek capital letter rho, U+03A1
/* there is no Sigmaf, and no U+03A2 character either */
@"Σ", @"Σ", // greek capital letter sigma,+03A3 ISOgrk3
@"Τ", @"Τ", // greek capital letter tau, U+03A4
@"Υ", @"Υ", // greek capital letter upsilon,+03A5 ISOgrk3
@"Φ", @"Φ", // greek capital letter phi,+03A6 ISOgrk3
@"Χ", @"Χ", // greek capital letter chi, U+03A7
@"Ψ", @"Ψ", // greek capital letter psi,+03A8 ISOgrk3
@"α", @"α", // greek small letter alpha,+03B1 ISOgrk3
@"β", @"β", // greek small letter beta, U+03B2 ISOgrk3
@"γ", @"γ", // greek small letter gamma,+03B3 ISOgrk3
@"δ", @"δ", // greek small letter delta,+03B4 ISOgrk3
@"ε", @"ε", // greek small letter epsilon,+03B5 ISOgrk3
@"ζ", @"ζ", // greek small letter zeta, U+03B6 ISOgrk3
@"η", @"η", // greek small letter eta, U+03B7 ISOgrk3
@"θ", @"θ", // greek small letter theta,+03B8 ISOgrk3
@"ι", @"ι", // greek small letter iota, U+03B9 ISOgrk3
@"κ", @"κ", // greek small letter kappa,+03BA ISOgrk3
@"λ", @"λ", // greek small letter lambda,+03BB ISOgrk3
@"μ", @"μ", // greek small letter mu, U+03BC ISOgrk3
@"ν", @"ν", // greek small letter nu, U+03BD ISOgrk3
@"ξ", @"ξ", // greek small letter xi, U+03BE ISOgrk3
@"ο", @"ο", // greek small letter omicron, U+03BF NEW
@"π", @"π", // greek small letter pi, U+03C0 ISOgrk3
@"ρ", @"ρ", // greek small letter rho, U+03C1 ISOgrk3
@"ς", @"ς", // greek small letter final sigma,+03C2 ISOgrk3
@"σ", @"σ", // greek small letter sigma,+03C3 ISOgrk3
@"τ", @"τ", // greek small letter tau, U+03C4 ISOgrk3
@"υ", @"υ", // greek small letter upsilon,+03C5 ISOgrk3
@"φ", @"φ", // greek small letter phi, U+03C6 ISOgrk3
@"χ", @"χ", // greek small letter chi, U+03C7 ISOgrk3
@"ψ", @"ψ", // greek small letter psi, U+03C8 ISOgrk3
@"ω", @"ω", // greek small letter omega,+03C9 ISOgrk3
@"ϑ", @"ϑ", // greek small letter theta symbol,+03D1 NEW
@"ϒ", @"ϒ", // greek upsilon with hook symbol,+03D2 NEW
@"ϖ", @"ϖ", // greek pi symbol, U+03D6 ISOgrk3
@"•", @"•", // bullet = black small circle,+2022 ISOpub
/* bullet is NOT the same as bullet operator, U+2219 */
@"…", @"…", // horizontal ellipsis = three dot leader,+2026 ISOpub
@"′", @"′", // prime = minutes = feet, U+2032 ISOtech
@"″", @"″", // double prime = seconds = inches,+2033 ISOtech
@"‾", @"‾", // overline = spacing overscore,+203E NEW
@"⁄", @"⁄", // fraction slash, U+2044 NEW
@"℘", @"℘", // script capital P = power set Weierstrass p, U+2118 ISOamso
@"ℑ", @"ℑ", // blackletter capital I = imaginary part,+2111 ISOamso
@"ℜ", @"ℜ", // blackletter capital R = real part symbol,+211C ISOamso
@"™", @"™", // trade mark sign, U+2122 ISOnum
@"ℵ", @"ℵ", // alef symbol = first transfinite cardinal,+2135 NEW
/* alef symbol is NOT the same as hebrew letter alef,+05D0 although the same glyph could be used to depict both characters *//* Arrows */
@"←", @"←", // leftwards arrow, U+2190 ISOnum
@"↑", @"↑", // upwards arrow, U+2191 ISOnum
@"→", @"→", // rightwards arrow, U+2192 ISOnum
@"↓", @"↓", // downwards arrow, U+2193 ISOnum
@"↔", @"↔", // left right arrow, U+2194 ISOamsa
@"↵", @"↵", // downwards arrow with corner leftwards carriage return, U+21B5 NEW
@"⇐", @"⇐", // leftwards double arrow, U+21D0 ISOtech
/* ISO 10646 does not say that lArr is the same as the 'is implied by' arrowut also does not have any other character for that function. So ? lArr cane used for 'is implied by' as ISOtech suggests */
@"⇑", @"⇑", // upwards double arrow, U+21D1 ISOamsa
@"⇒", @"⇒", // rightwards double arrow,+21D2 ISOtech
/* ISO 10646 does not say this is the 'implies' character but does not have nother character with this function so ?Arr can be used for 'implies' as ISOtech suggests */
@"⇓", @"⇓", // downwards double arrow, U+21D3 ISOamsa
@"⇔", @"⇔", // left right double arrow,+21D4 ISOamsa
@"∀", @"∀", // for all, U+2200 ISOtech
@"∂", @"∂", // partial differential, U+2202 ISOtech
@"∃", @"∃", // there exists, U+2203 ISOtech
@"∅", @"∅", // empty set = null set = diameter,+2205 ISOamso
@"∇", @"∇", // nabla = backward difference,+2207 ISOtech
@"∈", @"∈", // element of, U+2208 ISOtech
@"∉", @"∉", // not an element of, U+2209 ISOtech
@"∋", @"∋", // contains as member, U+220B ISOtech
/* should there be a more memorable name than 'ni'? */
@"∏", @"∏", // n-ary product = product sign,+220F ISOamsb
/* prod is NOT the same character as U+03A0 'greek capital letter pi' thoughhe same glyph might be used for both */
@"∑", @"∑", // n-ary sumation, U+2211 ISOamsb
/* sum is NOT the same character as U+03A3 'greek capital letter sigma'hough the same glyph might be used for both */
@"−", @"−", // minus sign, U+2212 ISOtech
@"∗", @"∗", // asterisk operator, U+2217 ISOtech
@"√", @"√", // square root = radical sign,+221A ISOtech
@"∝", @"∝", // proportional to, U+221D ISOtech
@"∞", @"∞", // infinity, U+221E ISOtech
@"∠", @"∠", // angle, U+2220 ISOamso
@"∧", @"∧", // logical and = wedge, U+2227 ISOtech
@"∨", @"∨", // logical or = vee, U+2228 ISOtech
@"∩", @"∩", // intersection = cap, U+2229 ISOtech
@"∪", @"∪", // union = cup, U+222A ISOtech
@"∫", @"∫", // integral, U+222B ISOtech
@"∴", @"∴", // therefore, U+2234 ISOtech
@"∼", @"∼", // tilde operator = varies with = similar to,+223C ISOtech
/* tilde operator is NOT the same character as the tilde, U+007E,lthough the same glyph might be used to represent both */
@"≅", @"≅", // approximately equal to, U+2245 ISOtech
@"≈", @"≈", // almost equal to = asymptotic to,+2248 ISOamsr
@"≠", @"≠", // not equal to, U+2260 ISOtech
@"≡", @"≡", // identical to, U+2261 ISOtech
@"≤", @"≤", // less-than or equal to, U+2264 ISOtech
@"≥", @"≥", // greater-than or equal to,+2265 ISOtech
@"⊂", @"⊂", // subset of, U+2282 ISOtech
@"⊃", @"⊃", // superset of, U+2283 ISOtech
/* note that nsup, 'not a superset of, U+2283' is not covered by the Symbol ont encoding and is not included. Should it be, for symmetry?t is in ISOamsn */
@"⊄", @"⊄", // not a subset of, U+2284 ISOamsn
@"⊆", @"⊆", // subset of or equal to, U+2286 ISOtech
@"⊇", @"⊇", // superset of or equal to,+2287 ISOtech
@"⊕", @"⊕", // circled plus = direct sum,+2295 ISOamsb
@"⊗", @"⊗", // circled times = vector product,+2297 ISOamsb
@"⊥", @"⊥", // up tack = orthogonal to = perpendicular,+22A5 ISOtech
@"⋅", @"⋅", // dot operator, U+22C5 ISOamsb
/* dot operator is NOT the same character as U+00B7 middle dot *//* Miscellaneous Technical */
@"⌈", @"⌈", // left ceiling = apl upstile,+2308 ISOamsc
@"⌉", @"⌉", // right ceiling, U+2309 ISOamsc
@"⌊", @"⌊", // left floor = apl downstile,+230A ISOamsc
@"⌋", @"⌋", // right floor, U+230B ISOamsc
@"〈", @"⟨", // left-pointing angle bracket = bra,+2329 ISOtech
/* lang is NOT the same character as U+003C 'less than' r U+2039 'single left-pointing angle quotation mark' */
@"〉", @"⟩", // right-pointing angle bracket = ket,+232A ISOtech
/* rang is NOT the same character as U+003E 'greater than' r U+203A 'single right-pointing angle quotation mark' *//* Geometric Shapes */
@"◊", @"◊", // lozenge, U+25CA ISOpub
@"♠", @"♠", // black spade suit, U+2660 ISOpub
/* black here seems to mean filled as opposed to hollow */
@"♣", @"♣", // black club suit = shamrock,+2663 ISOpub
@"♥", @"♥", // black heart suit = valentine,+2665 ISOpub
@"♦", @"♦", // black diamond suit, U+2666 ISOpub
// 24.4 Character entity references for markup-significant and internationalization characters
/* C0 Controls and Basic Latin */
@""", @""", // quotation mark = APL quote,+0022 ISOnum
@"&", @"&", // ampersand, U+0026 ISOnum
@"<", @"<", // less-than sign, U+003C ISOnum
@">", @">", // greater-than sign, U+003E ISOnum
@"Œ", @"Œ", // latin capital ligature OE,+0152 ISOlat2
@"œ", @"œ", // latin small ligature oe, U+0153 ISOlat2
/* ligature is a misnomer, this is a separate character in some languages */
@"Š", @"Š", // latin capital letter S with caron,+0160 ISOlat2
@"š", @"š", // latin small letter s with caron,+0161 ISOlat2
@"Ÿ", @"Ÿ", // latin capital letter Y with diaeresis,+0178 ISOlat2
@"ˆ", @"ˆ", // modifier letter circumflex accent,+02C6 ISOpub
@"˜", @"˜", // small tilde, U+02DC ISOdia
@" ", @" ", // en space, U+2002 ISOpub
@" ", @" ", // em space, U+2003 ISOpub
@" ", @" ", // thin space, U+2009 ISOpub
@"‌", @"‌", // zero width non-joiner,+200C NEW RFC 2070
@"‍", @"‍", // zero width joiner, U+200D NEW RFC 2070
@"‎", @"‎", // left-to-right mark, U+200E NEW RFC 2070
@"‏", @"‏", // right-to-left mark, U+200F NEW RFC 2070
@"–", @"–", // en dash, U+2013 ISOpub
@"—", @"—", // em dash, U+2014 ISOpub
@"‘", @"‘", // left single quotation mark,+2018 ISOnum
@"’", @"’", // right single quotation mark,+2019 ISOnum
@"‚", @"‚", // single low-9 quotation mark, U+201A NEW
@"“", @"“", // left double quotation mark,+201C ISOnum
@"”", @"”", // right double quotation mark,+201D ISOnum
@"„", @"„", // double low-9 quotation mark, U+201E NEW
@"†", @"†", // dagger, U+2020 ISOpub
@"‡", @"‡", // double dagger, U+2021 ISOpub
@"‰", @"‰", // per mille sign, U+2030 ISOtech
@"‹", @"‹", // single left-pointing angle quotation mark,+2039 ISO proposed
/* lsaquo is proposed but not yet ISO standardized */
@"›", @"›", // single right-pointing angle quotation mark,+203A ISO proposed
/* rsaquo is proposed but not yet ISO standardized */
@"€", @"€", // euro sign, U+20AC NEW
nil];
}
return namesToCodes;
}
@end