import java.util.HashMap;
import java.util.Map;
/* -----------------------------------------------------------
* nntp//rss - a bridge between the RSS world and NNTP clients
* Copyright (c) 2002, 2003 Jason Brome. All Rights Reserved.
*
* email: [email protected]
* mail: Methodize Solutions
* PO Box 3865
* Grand Central Station
* New York NY 10163
*
* This file is part of nntp//rss
*
* Entities list from:
* http://www.w3.org/TR/html401/sgml/entities.html
*
* Portions © International Organization for Standardization 1986:
* Permission to copy in any form is granted for use with
* conforming SGML systems and applications as defined in
* ISO 8879, provided this notice is included in all copies.
*
* nntp//rss 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, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307 USA
* ----------------------------------------------------- */
/**
* @author Jason Brome <[email protected]>
* @version $Id: HTMLHelper.java,v 1.1 2003/03/24 03:13:03 jasonbrome Exp $
*/
public class HTMLHelper {
private static Map escapeMap = new HashMap();
static {
// escapeMap.put("nbsp", new Character((char) 160));
escapeMap.put("nbsp", new Character(' '));
escapeMap.put("iexcl", new Character((char) 161));
escapeMap.put("cent", new Character((char) 162));
escapeMap.put("pound", new Character((char) 163));
escapeMap.put("curren", new Character((char) 164));
escapeMap.put("yen", new Character((char) 165));
escapeMap.put("brvbar", new Character((char) 166));
escapeMap.put("sect", new Character((char) 167));
escapeMap.put("uml", new Character((char) 168));
escapeMap.put("copy", new Character((char) 169));
escapeMap.put("ordf", new Character((char) 170));
escapeMap.put("laquo", new Character((char) 171));
escapeMap.put("not", new Character((char) 172));
escapeMap.put("shy", new Character((char) 173));
escapeMap.put("reg", new Character((char) 174));
escapeMap.put("macr", new Character((char) 175));
escapeMap.put("deg", new Character((char) 176));
escapeMap.put("plusmn", new Character((char) 177));
escapeMap.put("sup2", new Character((char) 178));
escapeMap.put("sup3", new Character((char) 179));
escapeMap.put("acute", new Character((char) 180));
escapeMap.put("micro", new Character((char) 181));
escapeMap.put("para", new Character((char) 182));
escapeMap.put("middot", new Character((char) 183));
escapeMap.put("cedil", new Character((char) 184));
escapeMap.put("sup1", new Character((char) 185));
escapeMap.put("ordm", new Character((char) 186));
escapeMap.put("raquo", new Character((char) 187));
escapeMap.put("frac14", new Character((char) 188));
escapeMap.put("frac12", new Character((char) 189));
escapeMap.put("frac34", new Character((char) 190));
escapeMap.put("iquest", new Character((char) 191));
escapeMap.put("Agrave", new Character((char) 192));
escapeMap.put("Aacute", new Character((char) 193));
escapeMap.put("Acirc", new Character((char) 194));
escapeMap.put("Atilde", new Character((char) 195));
escapeMap.put("Auml", new Character((char) 196));
escapeMap.put("Aring", new Character((char) 197));
escapeMap.put("AElig", new Character((char) 198));
escapeMap.put("Ccedil", new Character((char) 199));
escapeMap.put("Egrave", new Character((char) 200));
escapeMap.put("Eacute", new Character((char) 201));
escapeMap.put("Ecirc", new Character((char) 202));
escapeMap.put("Euml", new Character((char) 203));
escapeMap.put("Igrave", new Character((char) 204));
escapeMap.put("Iacute", new Character((char) 205));
escapeMap.put("Icirc", new Character((char) 206));
escapeMap.put("Iuml", new Character((char) 207));
escapeMap.put("ETH ", new Character((char) 208));
escapeMap.put("Ntilde", new Character((char) 209));
escapeMap.put("Ograve", new Character((char) 210));
escapeMap.put("Oacute", new Character((char) 211));
escapeMap.put("Ocirc", new Character((char) 212));
escapeMap.put("Otilde", new Character((char) 213));
escapeMap.put("Ouml", new Character((char) 214));
escapeMap.put("times", new Character((char) 215));
escapeMap.put("Oslash", new Character((char) 216));
escapeMap.put("Ugrave", new Character((char) 217));
escapeMap.put("Uacute", new Character((char) 218));
escapeMap.put("Ucirc", new Character((char) 219));
escapeMap.put("Uuml", new Character((char) 220));
escapeMap.put("Yacute", new Character((char) 221));
escapeMap.put("THORN", new Character((char) 222));
escapeMap.put("szlig", new Character((char) 223));
escapeMap.put("agrave", new Character((char) 224));
escapeMap.put("aacute", new Character((char) 225));
escapeMap.put("acirc", new Character((char) 226));
escapeMap.put("atilde", new Character((char) 227));
escapeMap.put("auml", new Character((char) 228));
escapeMap.put("aring", new Character((char) 229));
escapeMap.put("aelig", new Character((char) 230));
escapeMap.put("ccedil", new Character((char) 231));
escapeMap.put("egrave", new Character((char) 232));
escapeMap.put("eacute", new Character((char) 233));
escapeMap.put("ecirc", new Character((char) 234));
escapeMap.put("euml", new Character((char) 235));
escapeMap.put("igrave", new Character((char) 236));
escapeMap.put("iacute", new Character((char) 237));
escapeMap.put("icirc", new Character((char) 238));
escapeMap.put("iuml", new Character((char) 239));
escapeMap.put("eth ", new Character((char) 240));
escapeMap.put("ntilde", new Character((char) 241));
escapeMap.put("ograve", new Character((char) 242));
escapeMap.put("oacute", new Character((char) 243));
escapeMap.put("ocirc", new Character((char) 244));
escapeMap.put("otilde", new Character((char) 245));
escapeMap.put("ouml", new Character((char) 246));
escapeMap.put("divide", new Character((char) 247));
escapeMap.put("oslash", new Character((char) 248));
escapeMap.put("ugrave", new Character((char) 249));
escapeMap.put("uacute", new Character((char) 250));
escapeMap.put("ucirc", new Character((char) 251));
escapeMap.put("uuml", new Character((char) 252));
escapeMap.put("yacute", new Character((char) 253));
escapeMap.put("thorn", new Character((char) 254));
escapeMap.put("yuml", new Character((char) 255));
// Mathematical, Greek and Symbolic characters for HTML
// Latin Extended-B
escapeMap.put("fnof", new Character((char) 402));
// Greek
escapeMap.put("Alpha", new Character((char) 913));
escapeMap.put("Beta", new Character((char) 914));
escapeMap.put("Gamma", new Character((char) 915));
escapeMap.put("Delta", new Character((char) 916));
escapeMap.put("Epsilon", new Character((char) 917));
escapeMap.put("Zeta", new Character((char) 918));
escapeMap.put("Eta", new Character((char) 919));
escapeMap.put("Theta", new Character((char) 920));
escapeMap.put("Iota", new Character((char) 921));
escapeMap.put("Kappa", new Character((char) 922));
escapeMap.put("Lambda", new Character((char) 923));
escapeMap.put("Mu", new Character((char) 924));
escapeMap.put("Nu", new Character((char) 925));
escapeMap.put("Xi", new Character((char) 926));
escapeMap.put("Omicron", new Character((char) 927));
escapeMap.put("Pi", new Character((char) 928));
escapeMap.put("Rho", new Character((char) 929));
escapeMap.put("Sigma", new Character((char) 931));
escapeMap.put("Tau", new Character((char) 932));
escapeMap.put("Upsilon", new Character((char) 933));
escapeMap.put("Phi", new Character((char) 934));
escapeMap.put("Chi", new Character((char) 935));
escapeMap.put("Psi", new Character((char) 936));
escapeMap.put("Omega", new Character((char) 937));
escapeMap.put("alpha", new Character((char) 945));
escapeMap.put("beta", new Character((char) 946));
escapeMap.put("gamma", new Character((char) 947));
escapeMap.put("delta", new Character((char) 948));
escapeMap.put("epsilon", new Character((char) 949));
escapeMap.put("zeta", new Character((char) 950));
escapeMap.put("eta", new Character((char) 951));
escapeMap.put("theta", new Character((char) 952));
escapeMap.put("iota", new Character((char) 953));
escapeMap.put("kappa", new Character((char) 954));
escapeMap.put("lambda", new Character((char) 955));
escapeMap.put("mu", new Character((char) 956));
escapeMap.put("nu", new Character((char) 957));
escapeMap.put("xi", new Character((char) 958));
escapeMap.put("omicron", new Character((char) 959));
escapeMap.put("pi", new Character((char) 960));
escapeMap.put("rho", new Character((char) 961));
escapeMap.put("sigmaf", new Character((char) 962));
escapeMap.put("sigma", new Character((char) 963));
escapeMap.put("tau", new Character((char) 964));
escapeMap.put("upsilon", new Character((char) 965));
escapeMap.put("phi", new Character((char) 966));
escapeMap.put("chi", new Character((char) 967));
escapeMap.put("psi", new Character((char) 968));
escapeMap.put("omega", new Character((char) 969));
escapeMap.put("thetasym", new Character((char) 977));
escapeMap.put("upsih", new Character((char) 978));
escapeMap.put("piv", new Character((char) 982));
// General Punctuation
escapeMap.put("bull", new Character((char) 8226));
escapeMap.put("hellip", new Character((char) 8230));
escapeMap.put("prime", new Character((char) 8242));
escapeMap.put("Prime", new Character((char) 8243));
escapeMap.put("oline", new Character((char) 8254));
escapeMap.put("frasl", new Character((char) 8260));
// Letterlike Symbols
escapeMap.put("weierp", new Character((char) 8472));
escapeMap.put("image", new Character((char) 8465));
escapeMap.put("real", new Character((char) 8476));
escapeMap.put("trade", new Character((char) 8482));
escapeMap.put("alefsym", new Character((char) 8501));
// Arrows
escapeMap.put("larr", new Character((char) 8592));
escapeMap.put("uarr", new Character((char) 8593));
escapeMap.put("rarr", new Character((char) 8594));
escapeMap.put("darr", new Character((char) 8595));
escapeMap.put("harr", new Character((char) 8596));
escapeMap.put("crarr", new Character((char) 8629));
escapeMap.put("lArr", new Character((char) 8656));
escapeMap.put("uArr", new Character((char) 8657));
escapeMap.put("rArr", new Character((char) 8658));
escapeMap.put("dArr", new Character((char) 8659));
escapeMap.put("hArr", new Character((char) 8660));
// Mathematical Operators
escapeMap.put("forall", new Character((char) 8704));
escapeMap.put("part", new Character((char) 8706));
escapeMap.put("exist", new Character((char) 8707));
escapeMap.put("empty", new Character((char) 8709));
escapeMap.put("nabla", new Character((char) 8711));
escapeMap.put("isin", new Character((char) 8712));
escapeMap.put("notin", new Character((char) 8713));
escapeMap.put("ni", new Character((char) 8715));
escapeMap.put("prod", new Character((char) 8719));
escapeMap.put("sum", new Character((char) 8721));
escapeMap.put("minus", new Character((char) 8722));
escapeMap.put("lowast", new Character((char) 8727));
escapeMap.put("radic", new Character((char) 8730));
escapeMap.put("prop", new Character((char) 8733));
escapeMap.put("infin", new Character((char) 8734));
escapeMap.put("ang", new Character((char) 8736));
escapeMap.put("and", new Character((char) 8743));
escapeMap.put("or", new Character((char) 8744));
escapeMap.put("cap", new Character((char) 8745));
escapeMap.put("cup", new Character((char) 8746));
escapeMap.put("int", new Character((char) 8747));
escapeMap.put("there4", new Character((char) 8756));
escapeMap.put("sim", new Character((char) 8764));
escapeMap.put("cong", new Character((char) 8773));
escapeMap.put("asymp", new Character((char) 8776));
escapeMap.put("ne", new Character((char) 8800));
escapeMap.put("equiv", new Character((char) 8801));
escapeMap.put("le", new Character((char) 8804));
escapeMap.put("ge", new Character((char) 8805));
escapeMap.put("sub", new Character((char) 8834));
escapeMap.put("sup", new Character((char) 8835));
escapeMap.put("nsub", new Character((char) 8836));
escapeMap.put("sube", new Character((char) 8838));
escapeMap.put("supe", new Character((char) 8839));
escapeMap.put("oplus", new Character((char) 8853));
escapeMap.put("otimes", new Character((char) 8855));
escapeMap.put("perp", new Character((char) 8869));
escapeMap.put("sdot", new Character((char) 8901));
// Miscellaneous Technical
escapeMap.put("lceil", new Character((char) 8968));
escapeMap.put("rceil", new Character((char) 8969));
escapeMap.put("lfloor", new Character((char) 8970));
escapeMap.put("rfloor", new Character((char) 8971));
escapeMap.put("lang", new Character((char) 9001));
escapeMap.put("rang", new Character((char) 9002));
// Geometric Shapes
escapeMap.put("loz", new Character((char) 9674));
// Miscellaneous Symbols
escapeMap.put("spades", new Character((char) 9824));
escapeMap.put("clubs", new Character((char) 9827));
escapeMap.put("hearts", new Character((char) 9829));
escapeMap.put("diams", new Character((char) 9830));
// Special characters for HTML
// C0 Controls and Basic Latin
escapeMap.put("quot", new Character((char) 34));
escapeMap.put("amp", new Character((char) 38));
escapeMap.put("lt", new Character((char) 60));
escapeMap.put("gt", new Character((char) 62));
escapeMap.put("apos", new Character('\''));
// Latin Extended-A
escapeMap.put("OElig", new Character((char) 338));
escapeMap.put("oelig", new Character((char) 339));
escapeMap.put("Scaron", new Character((char) 352));
escapeMap.put("scaron", new Character((char) 353));
escapeMap.put("Yuml", new Character((char) 376));
// Spacing Modifier Letters
escapeMap.put("circ", new Character((char) 710));
escapeMap.put("tilde", new Character((char) 732));
// General Punctuation
escapeMap.put("ensp", new Character((char) 8194));
escapeMap.put("emsp", new Character((char) 8195));
escapeMap.put("thinsp", new Character((char) 8201));
escapeMap.put("zwnj", new Character((char) 8204));
escapeMap.put("zwj", new Character((char) 8205));
escapeMap.put("lrm", new Character((char) 8206));
escapeMap.put("rlm", new Character((char) 8207));
escapeMap.put("ndash", new Character((char) 8211));
escapeMap.put("mdash", new Character((char) 8212));
escapeMap.put("lsquo", new Character((char) 8216));
escapeMap.put("rsquo", new Character((char) 8217));
escapeMap.put("sbquo", new Character((char) 8218));
escapeMap.put("ldquo", new Character((char) 8220));
escapeMap.put("rdquo", new Character((char) 8221));
escapeMap.put("bdquo", new Character((char) 8222));
escapeMap.put("dagger", new Character((char) 8224));
escapeMap.put("Dagger", new Character((char) 8225));
escapeMap.put("permil", new Character((char) 8240));
escapeMap.put("lsaquo", new Character((char) 8249));
escapeMap.put("rsaquo", new Character((char) 8250));
escapeMap.put("euro", new Character((char) 8364));
}
public static String unescapeString(String value) {
StringBuffer unescapedString = new StringBuffer();
StringBuffer charBuf = null;
for (int pos = 0; pos < value.length(); pos++) {
char c = value.charAt(pos);
if (c == '&') { // Process reference...
c = value.charAt(++pos);
boolean numeric = false;
if (c == '#') {
numeric = true;
c = value.charAt(++pos);
}
if (charBuf == null) {
charBuf = new StringBuffer(32);
} else {
charBuf.setLength(0);
}
while (c != ';' && pos < value.length() - 1) {
charBuf.append(c);
c = value.charAt(++pos);
}
if (numeric) {
try {
c = (char) Integer.parseInt(charBuf.toString(), 16);
} catch (NumberFormatException nfe) {
// If we can't process it, just write out the text...
unescapedString.append("&#").append(
charBuf.toString()).append(
';');
}
} else {
Character unescapedVer =
(Character) escapeMap.get(charBuf.toString());
if (unescapedVer != null) {
unescapedString.append(unescapedVer);
} else {
unescapedString.append("&").append(
charBuf.toString()).append(
';');
}
}
} else {
unescapedString.append(c);
}
}
return unescapedString.toString();
}
public static String escapeString(String value) {
StringBuffer escapedString = new StringBuffer();
for (int charCount = 0; charCount < value.length(); charCount++) {
char c = value.charAt(charCount);
switch (c) {
case '&' :
escapedString.append("&");
break;
case '<' :
escapedString.append("<");
break;
case '>' :
escapedString.append(">");
break;
case '\"' :
escapedString.append(""");
break;
case '\'' :
escapedString.append("'");
break;
default :
escapedString.append(c);
}
}
return escapedString.toString();
}
public static String stripCRLF(String value) {
StringBuffer strippedString = new StringBuffer();
for (int i = 0; i < value.length(); i++) {
char c = value.charAt(i);
if (!(c == '\n' || c == '\r')) {
strippedString.append(c);
}
}
return strippedString.toString();
}
}
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