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September 23, 2008 21:53
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HTML encoder using named entities
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| #region Imports | |
| using System; | |
| using System.Globalization; | |
| using System.Text; | |
| using System.Text.RegularExpressions; | |
| #endregion | |
| public static class HtmlEncoder | |
| { | |
| private readonly static string[] _entityNames; | |
| private static readonly Regex _entityExpression = new Regex( | |
| @"&\#(?:(?:x([0-9a-f]{1,4}))|([0-9]{1,5}));", | |
| RegexOptions.IgnoreCase | RegexOptions.Compiled); | |
| /// <summary> | |
| /// Replaces as many numbered entitiy references in the input HTML | |
| /// string to their named counterparts where possible. For | |
| /// example, &#252; (U+00FC) will be coverted to &uuml;. | |
| /// </summary> | |
| /// <remarks> | |
| /// If a numbered entity reference has no name then it is left as | |
| /// in the source string. Numbered entity reference for simple | |
| /// whitespace characters like TAB (U+0009), CR (U+000A) and | |
| /// LF (U+000D) are converted to native character. | |
| /// </remarks> | |
| public static string NameNumberedEntities(string html) | |
| { | |
| var sb = NameNumberedEntitiesImpl(html, null); | |
| return sb != null ? sb.ToString() : html; | |
| } | |
| /// <summary> | |
| /// Replaces as many numbered entitiy references in the input HTML | |
| /// string to their named counterparts where possible. For | |
| /// example, &#252; (U+00FC) will be coverted to &uuml;. | |
| /// </summary> | |
| /// <remarks> | |
| /// If a numbered entity reference has no name then it is left as | |
| /// in the source string. Numbered entity reference for simple | |
| /// whitespace characters like TAB (U+0009), CR (U+000A) and | |
| /// LF (U+000D) are converted to native character. | |
| /// </remarks> | |
| public static void NameNumberedEntitiesTo(string html, StringBuilder sb) | |
| { | |
| if (sb == null) throw new ArgumentNullException("sb"); | |
| NameNumberedEntitiesImpl(html, sb); | |
| } | |
| private static StringBuilder NameNumberedEntitiesImpl(string html, StringBuilder sb) | |
| { | |
| var start = 0; | |
| foreach (Match match in _entityExpression.Matches(html)) | |
| { | |
| var hex = match.Groups[1]; | |
| var dec = match.Groups[2]; | |
| var ch = (char)int.Parse( | |
| hex.Success ? hex.Value : dec.Value, | |
| hex.Success ? NumberStyles.AllowHexSpecifier : NumberStyles.None, | |
| NumberFormatInfo.InvariantInfo); | |
| char? chch = null; | |
| string name = null; | |
| if (ch == '\t' || ch == '\n' || ch == '\r' || ( | |
| ch >= 0x20 && ch < 0x80 | |
| && ch != '"' && ch != '&' | |
| && ch != '<' && ch != '>')) | |
| { | |
| chch = ch; | |
| } | |
| else | |
| { | |
| name = ch < _entityNames.Length ? _entityNames[ch] : match.Value; | |
| } | |
| if (sb == null) | |
| sb = new StringBuilder(html.Length + 10); | |
| var index = match.Index; | |
| sb.Append(html, start, index - start); | |
| start = index + match.Length; | |
| if (chch == null) | |
| sb.Append(name); | |
| else | |
| sb.Append(chch); | |
| } | |
| if (sb == null) | |
| return null; | |
| if (start < html.Length) | |
| sb.Append(html, start, html.Length - start); | |
| return sb; | |
| } | |
| /// <summary> | |
| /// HTML-encodes the input string. It behaves similar to | |
| /// <a href="http://msdn.microsoft.com/en-us/library/system.web.httputility.htmlencode.aspx">HttpUtility.HtmlEncode</a> | |
| /// except it uses named entity references wherever possible. For | |
| /// example, a small letter U with umlaut (U+00FC) in the source | |
| /// string will be encoded as ü instead of ü. | |
| /// </summary> | |
| public static string EncodeNamed(string input) | |
| { | |
| return EncodeNamed(input, false); | |
| } | |
| /// <summary> | |
| /// HTML-encodes the input string. It behaves similar to | |
| /// <a href="http://msdn.microsoft.com/en-us/library/system.web.httputility.htmlencode.aspx">HttpUtility.HtmlEncode</a> | |
| /// except it uses named entity references wherever possible. For | |
| /// example, a small letter U with umlaut (U+00FC) in the source | |
| /// string will be encoded as ü instead of ü. | |
| /// </summary> | |
| public static string EncodeNamed(string input, bool escaped) | |
| { | |
| var sb = EncodeNamedImpl(input, escaped, null); | |
| return sb != null ? sb.ToString() : input; | |
| } | |
| /// <summary> | |
| /// HTML-encodes the input string. It behaves similar to | |
| /// <a href="http://msdn.microsoft.com/en-us/library/system.web.httputility.htmlencode.aspx">HttpUtility.HtmlEncode</a> | |
| /// except it uses named entity references wherever possible. For | |
| /// example, a small letter U with umlaut (U+00FC) in the source | |
| /// string will be encoded as ü instead of ü. | |
| /// </summary> | |
| public static void EncodeNamedTo(string input, bool escaped, StringBuilder sb) | |
| { | |
| if (sb == null) throw new ArgumentNullException("sb"); | |
| EncodeNamedImpl(input, escaped, sb); | |
| } | |
| private static StringBuilder EncodeNamedImpl(string input, bool escaped, StringBuilder sb) | |
| { | |
| if (input == null) | |
| return null; | |
| var start = 0; | |
| for (var index = 0; index < input.Length; index++) | |
| { | |
| var ch = input[index]; | |
| if (ch == '\t' || ch == '\n' || ch == '\r' | |
| || (ch >= 0x20 && ch < 0x80 | |
| && (escaped | |
| || (ch != '"' && ch != '&' | |
| && ch != '<' && ch != '>')))) | |
| { | |
| continue; | |
| } | |
| if (sb == null) | |
| sb = new StringBuilder(input.Length + 10); | |
| sb.Append(input, start, index - start); | |
| start = index + 1; | |
| var name = ch < _entityNames.Length ? _entityNames[ch] : null; | |
| if (name != null) | |
| { | |
| sb.Append(name); | |
| } | |
| else | |
| { | |
| sb.Append("&#") | |
| .Append(((int)ch).ToString(NumberFormatInfo.InvariantInfo)) | |
| .Append(';'); | |
| } | |
| } | |
| if (sb == null) | |
| return null; | |
| if (start < input.Length) | |
| sb.Append(input, start, input.Length - start); | |
| return sb; | |
| } | |
| static HtmlEncoder() | |
| { | |
| var e = new string[9831]; // Approx. 38.4K on a 32-bit machine | |
| e[34] = """; // quot = quotation mark = APL quote, U+0022 ISOnum | |
| e[38] = "&"; // amp = ampersand, U+0026 ISOnum | |
| e[60] = "<"; // lt = less-than sign, U+003C ISOnum | |
| e[62] = ">"; // gt = greater-than sign, U+003E ISOnum | |
| // Latin-1 character entities | |
| e[160] = " "; // nbsp = no-break space = non-breaking space, U+00A0 ISOnum | |
| e[161] = "¡"; // iexcl = inverted exclamation mark, U+00A1 ISOnum | |
| e[162] = "¢"; // cent = cent sign, U+00A2 ISOnum | |
| e[163] = "£"; // pound = pound sign, U+00A3 ISOnum | |
| e[164] = "¤"; // curren = currency sign, U+00A4 ISOnum | |
| e[165] = "¥"; // yen = yen sign = yuan sign, U+00A5 ISOnum | |
| e[166] = "¦"; // brvbar = broken bar = broken vertical bar, U+00A6 ISOnum | |
| e[167] = "§"; // sect = section sign, U+00A7 ISOnum | |
| e[168] = "¨"; // uml = diaeresis = spacing diaeresis, U+00A8 ISOdia | |
| e[169] = "©"; // copy = copyright sign, U+00A9 ISOnum | |
| e[170] = "ª"; // ordf = feminine ordinal indicator, U+00AA ISOnum | |
| e[171] = "«"; // laquo = left-pointing double angle quotation mark = left pointing guillemet, U+00AB ISOnum | |
| e[172] = "¬"; // not = not sign, U+00AC ISOnum | |
| e[173] = "­"; // shy = soft hyphen = discretionary hyphen, U+00AD ISOnum | |
| e[174] = "®"; // reg = registered sign = registered trade mark sign, U+00AE ISOnum | |
| e[175] = "¯"; // macr = macron = spacing macron = overline = APL overbar, U+00AF ISOdia | |
| e[176] = "°"; // deg = degree sign, U+00B0 ISOnum | |
| e[177] = "±"; // plusmn = plus-minus sign = plus-or-minus sign, U+00B1 ISOnum | |
| e[178] = "²"; // sup2 = superscript two = superscript digit two = squared, U+00B2 ISOnum | |
| e[179] = "³"; // sup3 = superscript three = superscript digit three = cubed, U+00B3 ISOnum | |
| e[180] = "´"; // acute = acute accent = spacing acute, U+00B4 ISOdia | |
| e[181] = "µ"; // micro = micro sign, U+00B5 ISOnum | |
| e[182] = "¶"; // para = pilcrow sign = paragraph sign, U+00B6 ISOnum | |
| e[183] = "·"; // middot = middle dot = Georgian comma = Greek middle dot, U+00B7 ISOnum | |
| e[184] = "¸"; // cedil = cedilla = spacing cedilla, U+00B8 ISOdia | |
| e[185] = "¹"; // sup1 = superscript one = superscript digit one, U+00B9 ISOnum | |
| e[186] = "º"; // ordm = masculine ordinal indicator, U+00BA ISOnum | |
| e[187] = "»"; // raquo = right-pointing double angle quotation mark = right pointing guillemet, U+00BB ISOnum | |
| e[188] = "¼"; // frac14 = vulgar fraction one quarter = fraction one quarter, U+00BC ISOnum | |
| e[189] = "½"; // frac12 = vulgar fraction one half = fraction one half, U+00BD ISOnum | |
| e[190] = "¾"; // frac34 = vulgar fraction three quarters = fraction three quarters, U+00BE ISOnum | |
| e[191] = "¿"; // iquest = inverted question mark = turned question mark, U+00BF ISOnum | |
| e[192] = "À"; // Agrave = latin capital letter A with grave = latin capital letter A grave, U+00C0 ISOlat1 | |
| e[193] = "Á"; // Aacute = latin capital letter A with acute, U+00C1 ISOlat1 | |
| e[194] = "Â"; // Acirc = latin capital letter A with circumflex, U+00C2 ISOlat1 | |
| e[195] = "Ã"; // Atilde = latin capital letter A with tilde, U+00C3 ISOlat1 | |
| e[196] = "Ä"; // Auml = latin capital letter A with diaeresis, U+00C4 ISOlat1 | |
| e[197] = "Å"; // Aring = latin capital letter A with ring above = latin capital letter A ring, U+00C5 ISOlat1 | |
| e[198] = "Æ"; // AElig = latin capital letter AE = latin capital ligature AE, U+00C6 ISOlat1 | |
| e[199] = "Ç"; // Ccedil = latin capital letter C with cedilla, U+00C7 ISOlat1 | |
| e[200] = "È"; // Egrave = latin capital letter E with grave, U+00C8 ISOlat1 | |
| e[201] = "É"; // Eacute = latin capital letter E with acute, U+00C9 ISOlat1 | |
| e[202] = "Ê"; // Ecirc = latin capital letter E with circumflex, U+00CA ISOlat1 | |
| e[203] = "Ë"; // Euml = latin capital letter E with diaeresis, U+00CB ISOlat1 | |
| e[204] = "Ì"; // Igrave = latin capital letter I with grave, U+00CC ISOlat1 | |
| e[205] = "Í"; // Iacute = latin capital letter I with acute, U+00CD ISOlat1 | |
| e[206] = "Î"; // Icirc = latin capital letter I with circumflex, U+00CE ISOlat1 | |
| e[207] = "Ï"; // Iuml = latin capital letter I with diaeresis, U+00CF ISOlat1 | |
| e[208] = "Ð"; // ETH = latin capital letter ETH, U+00D0 ISOlat1 | |
| e[209] = "Ñ"; // Ntilde = latin capital letter N with tilde, U+00D1 ISOlat1 | |
| e[210] = "Ò"; // Ograve = latin capital letter O with grave, U+00D2 ISOlat1 | |
| e[211] = "Ó"; // Oacute = latin capital letter O with acute, U+00D3 ISOlat1 | |
| e[212] = "Ô"; // Ocirc = latin capital letter O with circumflex, U+00D4 ISOlat1 | |
| e[213] = "Õ"; // Otilde = latin capital letter O with tilde, U+00D5 ISOlat1 | |
| e[214] = "Ö"; // Ouml = latin capital letter O with diaeresis, U+00D6 ISOlat1 | |
| e[215] = "×"; // times = multiplication sign, U+00D7 ISOnum | |
| e[216] = "Ø"; // Oslash = latin capital letter O with stroke = latin capital letter O slash, U+00D8 ISOlat1 | |
| e[217] = "Ù"; // Ugrave = latin capital letter U with grave, U+00D9 ISOlat1 | |
| e[218] = "Ú"; // Uacute = latin capital letter U with acute, U+00DA ISOlat1 | |
| e[219] = "Û"; // Ucirc = latin capital letter U with circumflex, U+00DB ISOlat1 | |
| e[220] = "Ü"; // Uuml = latin capital letter U with diaeresis, U+00DC ISOlat1 | |
| e[221] = "Ý"; // Yacute = latin capital letter Y with acute, U+00DD ISOlat1 | |
| e[222] = "Þ"; // THORN = latin capital letter THORN, U+00DE ISOlat1 | |
| e[223] = "ß"; // szlig = latin small letter sharp s = ess-zed, U+00DF ISOlat1 | |
| e[224] = "à"; // agrave = latin small letter a with grave = latin small letter a grave, U+00E0 ISOlat1 | |
| e[225] = "á"; // aacute = latin small letter a with acute, U+00E1 ISOlat1 | |
| e[226] = "â"; // acirc = latin small letter a with circumflex, U+00E2 ISOlat1 | |
| e[227] = "ã"; // atilde = latin small letter a with tilde, U+00E3 ISOlat1 | |
| e[228] = "ä"; // auml = latin small letter a with diaeresis, U+00E4 ISOlat1 | |
| e[229] = "å"; // aring = latin small letter a with ring above = latin small letter a ring, U+00E5 ISOlat1 | |
| e[230] = "æ"; // aelig = latin small letter ae = latin small ligature ae, U+00E6 ISOlat1 | |
| e[231] = "ç"; // ccedil = latin small letter c with cedilla, U+00E7 ISOlat1 | |
| e[232] = "è"; // egrave = latin small letter e with grave, U+00E8 ISOlat1 | |
| e[233] = "é"; // eacute = latin small letter e with acute, U+00E9 ISOlat1 | |
| e[234] = "ê"; // ecirc = latin small letter e with circumflex, U+00EA ISOlat1 | |
| e[235] = "ë"; // euml = latin small letter e with diaeresis, U+00EB ISOlat1 | |
| e[236] = "ì"; // igrave = latin small letter i with grave, U+00EC ISOlat1 | |
| e[237] = "í"; // iacute = latin small letter i with acute, U+00ED ISOlat1 | |
| e[238] = "î"; // icirc = latin small letter i with circumflex, U+00EE ISOlat1 | |
| e[239] = "ï"; // iuml = latin small letter i with diaeresis, U+00EF ISOlat1 | |
| e[240] = "ð"; // eth = latin small letter eth, U+00F0 ISOlat1 | |
| e[241] = "ñ"; // ntilde = latin small letter n with tilde, U+00F1 ISOlat1 | |
| e[242] = "ò"; // ograve = latin small letter o with grave, U+00F2 ISOlat1 | |
| e[243] = "ó"; // oacute = latin small letter o with acute, U+00F3 ISOlat1 | |
| e[244] = "ô"; // ocirc = latin small letter o with circumflex, U+00F4 ISOlat1 | |
| e[245] = "õ"; // otilde = latin small letter o with tilde, U+00F5 ISOlat1 | |
| e[246] = "ö"; // ouml = latin small letter o with diaeresis, U+00F6 ISOlat1 | |
| e[247] = "÷"; // divide = division sign, U+00F7 ISOnum | |
| e[248] = "ø"; // oslash = latin small letter o with stroke, = latin small letter o slash, U+00F8 ISOlat1 | |
| e[249] = "ù"; // ugrave = latin small letter u with grave, U+00F9 ISOlat1 | |
| e[250] = "ú"; // uacute = latin small letter u with acute, U+00FA ISOlat1 | |
| e[251] = "û"; // ucirc = latin small letter u with circumflex, U+00FB ISOlat1 | |
| e[252] = "ü"; // uuml = latin small letter u with diaeresis, U+00FC ISOlat1 | |
| e[253] = "ý"; // yacute = latin small letter y with acute, U+00FD ISOlat1 | |
| e[254] = "þ"; // thorn = latin small letter thorn, U+00FE ISOlat1 | |
| e[255] = "ÿ"; // yuml = latin small letter y with diaeresis, U+00FF ISOlat1 | |
| // Extended Entities defined in HTML 4: Symbols | |
| e[402] = "ƒ"; // fnof = latin small f with hook = function = florin, U+0192 ISOtech | |
| e[913] = "Α"; // Alpha = greek capital letter alpha, U+0391 | |
| e[914] = "Β"; // Beta = greek capital letter beta, U+0392 | |
| e[915] = "Γ"; // Gamma = greek capital letter gamma, U+0393 ISOgrk3 | |
| e[916] = "Δ"; // Delta = greek capital letter delta, U+0394 ISOgrk3 | |
| e[917] = "Ε"; // Epsilon = greek capital letter epsilon, U+0395 | |
| e[918] = "Ζ"; // Zeta = greek capital letter zeta, U+0396 | |
| e[919] = "Η"; // Eta = greek capital letter eta, U+0397 | |
| e[920] = "Θ"; // Theta = greek capital letter theta, U+0398 ISOgrk3 | |
| e[921] = "Ι"; // Iota = greek capital letter iota, U+0399 | |
| e[922] = "Κ"; // Kappa = greek capital letter kappa, U+039A | |
| e[923] = "Λ"; // Lambda = greek capital letter lambda, U+039B ISOgrk3 | |
| e[924] = "Μ"; // Mu = greek capital letter mu, U+039C | |
| e[925] = "Ν"; // Nu = greek capital letter nu, U+039D | |
| e[926] = "Ξ"; // Xi = greek capital letter xi, U+039E ISOgrk3 | |
| e[927] = "Ο"; // Omicron = greek capital letter omicron, U+039F | |
| e[928] = "Π"; // Pi = greek capital letter pi, U+03A0 ISOgrk3 | |
| e[929] = "Ρ"; // Rho = greek capital letter rho, U+03A1 | |
| e[931] = "Σ"; // Sigma = greek capital letter sigma, U+03A3 ISOgrk3 | |
| e[932] = "Τ"; // Tau = greek capital letter tau, U+03A4 | |
| e[933] = "Υ"; // Upsilon = greek capital letter upsilon, U+03A5 ISOgrk3 | |
| e[934] = "Φ"; // Phi = greek capital letter phi, U+03A6 ISOgrk3 | |
| e[935] = "Χ"; // Chi = greek capital letter chi, U+03A7 | |
| e[936] = "Ψ"; // Psi = greek capital letter psi, U+03A8 ISOgrk3 | |
| e[937] = "Ω"; // Omega = greek capital letter omega, U+03A9 ISOgrk3 | |
| e[945] = "α"; // alpha = greek small letter alpha, U+03B1 ISOgrk3 | |
| e[946] = "β"; // beta = greek small letter beta, U+03B2 ISOgrk3 | |
| e[947] = "γ"; // gamma = greek small letter gamma, U+03B3 ISOgrk3 | |
| e[948] = "δ"; // delta = greek small letter delta, U+03B4 ISOgrk3 | |
| e[949] = "ε"; // epsilon = greek small letter epsilon, U+03B5 ISOgrk3 | |
| e[950] = "ζ"; // zeta = greek small letter zeta, U+03B6 ISOgrk3 | |
| e[951] = "η"; // eta = greek small letter eta, U+03B7 ISOgrk3 | |
| e[952] = "θ"; // theta = greek small letter theta, U+03B8 ISOgrk3 | |
| e[953] = "ι"; // iota = greek small letter iota, U+03B9 ISOgrk3 | |
| e[954] = "κ"; // kappa = greek small letter kappa, U+03BA ISOgrk3 | |
| e[955] = "λ"; // lambda = greek small letter lambda, U+03BB ISOgrk3 | |
| e[956] = "μ"; // mu = greek small letter mu, U+03BC ISOgrk3 | |
| e[957] = "ν"; // nu = greek small letter nu, U+03BD ISOgrk3 | |
| e[958] = "ξ"; // xi = greek small letter xi, U+03BE ISOgrk3 | |
| e[959] = "ο"; // omicron = greek small letter omicron, U+03BF NEW | |
| e[960] = "π"; // pi = greek small letter pi, U+03C0 ISOgrk3 | |
| e[961] = "ρ"; // rho = greek small letter rho, U+03C1 ISOgrk3 | |
| e[962] = "ς"; // sigmaf = greek small letter final sigma, U+03C2 ISOgrk3 | |
| e[963] = "σ"; // sigma = greek small letter sigma, U+03C3 ISOgrk3 | |
| e[964] = "τ"; // tau = greek small letter tau, U+03C4 ISOgrk3 | |
| e[965] = "υ"; // upsilon = greek small letter upsilon, U+03C5 ISOgrk3 | |
| e[966] = "φ"; // phi = greek small letter phi, U+03C6 ISOgrk3 | |
| e[967] = "χ"; // chi = greek small letter chi, U+03C7 ISOgrk3 | |
| e[968] = "ψ"; // psi = greek small letter psi, U+03C8 ISOgrk3 | |
| e[969] = "ω"; // omega = greek small letter omega, U+03C9 ISOgrk3 | |
| e[977] = "ϑ"; // thetasym = greek small letter theta symbol, U+03D1 NEW | |
| e[978] = "ϒ"; // upsih = greek upsilon with hook symbol, U+03D2 NEW | |
| e[982] = "ϖ"; // piv = greek pi symbol, U+03D6 ISOgrk3 | |
| e[8226] = "•"; // bull = bullet = black small circle, U+2022 ISOpub | |
| e[8230] = "…"; // hellip = horizontal ellipsis = three dot leader, U+2026 ISOpub | |
| e[8242] = "′"; // prime = prime = minutes = feet, U+2032 ISOtech | |
| e[8243] = "″"; // Prime = double prime = seconds = inches, U+2033 ISOtech | |
| e[8254] = "‾"; // oline = overline = spacing overscore, U+203E NEW | |
| e[8260] = "⁄"; // frasl = fraction slash, U+2044 NEW | |
| e[8472] = "℘"; // weierp = script capital P = power set = Weierstrass p, U+2118 ISOamso | |
| e[8465] = "ℑ"; // image = blackletter capital I = imaginary part, U+2111 ISOamso | |
| e[8476] = "ℜ"; // real = blackletter capital R = real part symbol, U+211C ISOamso | |
| e[8482] = "™"; // trade = trade mark sign, U+2122 ISOnum | |
| e[8501] = "ℵ"; // alefsym = alef symbol = first transfinite cardinal, U+2135 NEW | |
| e[8592] = "←"; // larr = leftwards arrow, U+2190 ISOnum | |
| e[8593] = "↑"; // uarr = upwards arrow, U+2191 ISOnum | |
| e[8594] = "→"; // rarr = rightwards arrow, U+2192 ISOnum | |
| e[8595] = "↓"; // darr = downwards arrow, U+2193 ISOnum | |
| e[8596] = "↔"; // harr = left right arrow, U+2194 ISOamsa | |
| e[8629] = "↵"; // crarr = downwards arrow with corner leftwards = carriage return, U+21B5 NEW | |
| e[8656] = "⇐"; // lArr = leftwards double arrow, U+21D0 ISOtech | |
| e[8657] = "⇑"; // uArr = upwards double arrow, U+21D1 ISOamsa | |
| e[8658] = "⇒"; // rArr = rightwards double arrow, U+21D2 ISOtech | |
| e[8659] = "⇓"; // dArr = downwards double arrow, U+21D3 ISOamsa | |
| e[8660] = "⇔"; // hArr = left right double arrow, U+21D4 ISOamsa | |
| e[8704] = "∀"; // forall = for all, U+2200 ISOtech | |
| e[8706] = "∂"; // part = partial differential, U+2202 ISOtech | |
| e[8707] = "∃"; // exist = there exists, U+2203 ISOtech | |
| e[8709] = "∅"; // empty = empty set = null set = diameter, U+2205 ISOamso | |
| e[8711] = "∇"; // nabla = nabla = backward difference, U+2207 ISOtech | |
| e[8712] = "∈"; // isin = element of, U+2208 ISOtech | |
| e[8713] = "∉"; // notin = not an element of, U+2209 ISOtech | |
| e[8715] = "∋"; // ni = contains as member, U+220B ISOtech | |
| e[8719] = "∏"; // prod = n-ary product = product sign, U+220F ISOamsb | |
| e[8721] = "∑"; // sum = n-ary sumation, U+2211 ISOamsb | |
| e[8722] = "−"; // minus = minus sign, U+2212 ISOtech | |
| e[8727] = "∗"; // lowast = asterisk operator, U+2217 ISOtech | |
| e[8730] = "√"; // radic = square root = radical sign, U+221A ISOtech | |
| e[8733] = "∝"; // prop = proportional to, U+221D ISOtech | |
| e[8734] = "∞"; // infin = infinity, U+221E ISOtech | |
| e[8736] = "∠"; // ang = angle, U+2220 ISOamso | |
| e[8743] = "∧"; // and = logical and = wedge, U+2227 ISOtech | |
| e[8744] = "∨"; // or = logical or = vee, U+2228 ISOtech | |
| e[8745] = "∩"; // cap = intersection = cap, U+2229 ISOtech | |
| e[8746] = "∪"; // cup = union = cup, U+222A ISOtech | |
| e[8747] = "∫"; // int = integral, U+222B ISOtech | |
| e[8756] = "∴"; // there4 = therefore, U+2234 ISOtech | |
| e[8764] = "∼"; // sim = tilde operator = varies with = similar to, U+223C ISOtech | |
| e[8773] = "≅"; // cong = approximately equal to, U+2245 ISOtech | |
| e[8776] = "≈"; // asymp = almost equal to = asymptotic to, U+2248 ISOamsr | |
| e[8800] = "≠"; // ne = not equal to, U+2260 ISOtech | |
| e[8801] = "≡"; // equiv = identical to, U+2261 ISOtech | |
| e[8804] = "≤"; // le = less-than or equal to, U+2264 ISOtech | |
| e[8805] = "≥"; // ge = greater-than or equal to, U+2265 ISOtech | |
| e[8834] = "⊂"; // sub = subset of, U+2282 ISOtech | |
| e[8835] = "⊃"; // sup = superset of, U+2283 ISOtech | |
| e[8836] = "⊄"; // nsub = not a subset of, U+2284 ISOamsn | |
| e[8838] = "⊆"; // sube = subset of or equal to, U+2286 ISOtech | |
| e[8839] = "⊇"; // supe = superset of or equal to, U+2287 ISOtech | |
| e[8853] = "⊕"; // oplus = circled plus = direct sum, U+2295 ISOamsb | |
| e[8855] = "⊗"; // otimes = circled times = vector product, U+2297 ISOamsb | |
| e[8869] = "⊥"; // perp = up tack = orthogonal to = perpendicular, U+22A5 ISOtech | |
| e[8901] = "⋅"; // sdot = dot operator, U+22C5 ISOamsb | |
| e[8968] = "⌈"; // lceil = left ceiling = apl upstile, U+2308 ISOamsc | |
| e[8969] = "⌉"; // rceil = right ceiling, U+2309 ISOamsc | |
| e[8970] = "⌊"; // lfloor = left floor = apl downstile, U+230A ISOamsc | |
| e[8971] = "⌋"; // rfloor = right floor, U+230B ISOamsc | |
| e[9001] = "⟨"; // lang = left-pointing angle bracket = bra, U+2329 ISOtech | |
| e[9002] = "⟩"; // rang = right-pointing angle bracket = ket, U+232A ISOtech | |
| e[9674] = "◊"; // loz = lozenge, U+25CA ISOpub | |
| e[9824] = "♠"; // spades = black spade suit, U+2660 ISOpub | |
| e[9827] = "♣"; // clubs = black club suit = shamrock, U+2663 ISOpub | |
| e[9829] = "♥"; // hearts = black heart suit = valentine, U+2665 ISOpub | |
| e[9830] = "♦"; // diams = black diamond suit, U+2666 ISOpub | |
| // Extended Entities defined in HTML 4: Special | |
| e[338] = "Œ"; // OElig = latin capital ligature OE, U+0152 ISOlat2 | |
| e[339] = "œ"; // oelig = latin small ligature oe, U+0153 ISOlat2 | |
| e[352] = "Š"; // Scaron = latin capital letter S with caron, U+0160 ISOlat2 | |
| e[353] = "š"; // scaron = latin small letter s with caron, U+0161 ISOlat2 | |
| e[376] = "Ÿ"; // Yuml = latin capital letter Y with diaeresis, U+0178 ISOlat2 | |
| e[710] = "ˆ"; // circ = modifier letter circumflex accent, U+02C6 ISOpub | |
| e[732] = "˜"; // tilde = small tilde, U+02DC ISOdia | |
| e[8194] = " "; // ensp = en space, U+2002 ISOpub | |
| e[8195] = " "; // emsp = em space, U+2003 ISOpub | |
| e[8201] = " "; // thinsp = thin space, U+2009 ISOpub | |
| e[8204] = "‌"; // zwnj = zero width non-joiner, U+200C NEW RFC 2070 | |
| e[8205] = "‍"; // zwj = zero width joiner, U+200D NEW RFC 2070 | |
| e[8206] = "‎"; // lrm = left-to-right mark, U+200E NEW RFC 2070 | |
| e[8207] = "‏"; // rlm = right-to-left mark, U+200F NEW RFC 2070 | |
| e[8211] = "–"; // ndash = en dash, U+2013 ISOpub | |
| e[8212] = "—"; // mdash = em dash, U+2014 ISOpub | |
| e[8216] = "‘"; // lsquo = left single quotation mark, U+2018 ISOnum | |
| e[8217] = "’"; // rsquo = right single quotation mark, U+2019 ISOnum | |
| e[8218] = "‚"; // sbquo = single low-9 quotation mark, U+201A NEW | |
| e[8220] = "“"; // ldquo = left double quotation mark, U+201C ISOnum | |
| e[8221] = "”"; // rdquo = right double quotation mark, U+201D ISOnum | |
| e[8222] = "„"; // bdquo = double low-9 quotation mark, U+201E NEW | |
| e[8224] = "†"; // dagger = dagger, U+2020 ISOpub | |
| e[8225] = "‡"; // Dagger = double dagger, U+2021 ISOpub | |
| e[8240] = "‰"; // permil = per mille sign, U+2030 ISOtech | |
| e[8249] = "‹"; // lsaquo = single left-pointing angle quotation mark, U+2039 ISO proposed | |
| e[8250] = "›"; // rsaquo = single right-pointing angle quotation mark, U+203A ISO proposed | |
| e[8364] = "€"; // euro = euro sign, U+20AC NEW | |
| _entityNames = e; | |
| } | |
| } |
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