package com.dwdesign.tweetings.util;
/*
* Static String formatting and query routines.
* Copyright (C) 2001-2005 Stephen Ostermiller
* http://ostermiller.org/contact.pl?regarding=Java+Utilities
*
* 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.
*
* See COPYING.TXT for details.
*/
import java.util.HashMap;
/**
* Utilities for String formatting, manipulation, and queries. More information
* about this class is available from <a target="_top" href=
* "http://ostermiller.org/utils/HtmlUnescapeHelper.html">ostermiller.org</a>.
*
* @author Stephen Ostermiller
* http://ostermiller.org/contact.pl?regarding=Java+Utilities
* @since ostermillerutils 1.00.00
*/
public class HtmlEscapeHelper {
@SuppressWarnings("serial")
private static final HashMap<String, Integer> htmlEntities = new HashMap<String, Integer>() {
{
put("nbsp", 160);
put("iexcl", 161);
put("cent", 162);
put("pound", 163);
put("curren", 164);
put("yen", 165);
put("brvbar", 166);
put("sect", 167);
put("uml", 168);
put("copy", 169);
put("ordf", 170);
put("laquo", 171);
put("not", 172);
put("shy", 173);
put("reg", 174);
put("macr", 175);
put("deg", 176);
put("plusmn", 177);
put("sup2", 178);
put("sup3", 179);
put("acute", 180);
put("micro", 181);
put("para", 182);
put("middot", 183);
put("cedil", 184);
put("sup1", 185);
put("ordm", 186);
put("raquo", 187);
put("frac14", 188);
put("frac12", 189);
put("frac34", 190);
put("iquest", 191);
put("Agrave", 192);
put("Aacute", 193);
put("Acirc", 194);
put("Atilde", 195);
put("Auml", 196);
put("Aring", 197);
put("AElig", 198);
put("Ccedil", 199);
put("Egrave", 200);
put("Eacute", 201);
put("Ecirc", 202);
put("Euml", 203);
put("Igrave", 204);
put("Iacute", 205);
put("Icirc", 206);
put("Iuml", 207);
put("ETH", 208);
put("Ntilde", 209);
put("Ograve", 210);
put("Oacute", 211);
put("Ocirc", 212);
put("Otilde", 213);
put("Ouml", 214);
put("times", 215);
put("Oslash", 216);
put("Ugrave", 217);
put("Uacute", 218);
put("Ucirc", 219);
put("Uuml", 220);
put("Yacute", 221);
put("THORN", 222);
put("szlig", 223);
put("agrave", 224);
put("aacute", 225);
put("acirc", 226);
put("atilde", 227);
put("auml", 228);
put("aring", 229);
put("aelig", 230);
put("ccedil", 231);
put("egrave", 232);
put("eacute", 233);
put("ecirc", 234);
put("euml", 235);
put("igrave", 236);
put("iacute", 237);
put("icirc", 238);
put("iuml", 239);
put("eth", 240);
put("ntilde", 241);
put("ograve", 242);
put("oacute", 243);
put("ocirc", 244);
put("otilde", 245);
put("ouml", 246);
put("divide", 247);
put("oslash", 248);
put("ugrave", 249);
put("uacute", 250);
put("ucirc", 251);
put("uuml", 252);
put("yacute", 253);
put("thorn", 254);
put("yuml", 255);
put("fnof", 402);
put("Alpha", 913);
put("Beta", 914);
put("Gamma", 915);
put("Delta", 916);
put("Epsilon", 917);
put("Zeta", 918);
put("Eta", 919);
put("Theta", 920);
put("Iota", 921);
put("Kappa", 922);
put("Lambda", 923);
put("Mu", 924);
put("Nu", 925);
put("Xi", 926);
put("Omicron", 927);
put("Pi", 928);
put("Rho", 929);
put("Sigma", 931);
put("Tau", 932);
put("Upsilon", 933);
put("Phi", 934);
put("Chi", 935);
put("Psi", 936);
put("Omega", 937);
put("alpha", 945);
put("beta", 946);
put("gamma", 947);
put("delta", 948);
put("epsilon", 949);
put("zeta", 950);
put("eta", 951);
put("theta", 952);
put("iota", 953);
put("kappa", 954);
put("lambda", 955);
put("mu", 956);
put("nu", 957);
put("xi", 958);
put("omicron", 959);
put("pi", 960);
put("rho", 961);
put("sigmaf", 962);
put("sigma", 963);
put("tau", 964);
put("upsilon", 965);
put("phi", 966);
put("chi", 967);
put("psi", 968);
put("omega", 969);
put("thetasym", 977);
put("upsih", 978);
put("piv", 982);
put("bull", 8226);
put("hellip", 8230);
put("prime", 8242);
put("Prime", 8243);
put("oline", 8254);
put("frasl", 8260);
put("weierp", 8472);
put("image", 8465);
put("real", 8476);
put("trade", 8482);
put("alefsym", 8501);
put("larr", 8592);
put("uarr", 8593);
put("rarr", 8594);
put("darr", 8595);
put("harr", 8596);
put("crarr", 8629);
put("lArr", 8656);
put("uArr", 8657);
put("rArr", 8658);
put("dArr", 8659);
put("hArr", 8660);
put("forall", 8704);
put("part", 8706);
put("exist", 8707);
put("empty", 8709);
put("nabla", 8711);
put("isin", 8712);
put("notin", 8713);
put("ni", 8715);
put("prod", 8719);
put("sum", 8721);
put("minus", 8722);
put("lowast", 8727);
put("radic", 8730);
put("prop", 8733);
put("infin", 8734);
put("ang", 8736);
put("and", 8743);
put("or", 8744);
put("cap", 8745);
put("cup", 8746);
put("int", 8747);
put("there4", 8756);
put("sim", 8764);
put("cong", 8773);
put("asymp", 8776);
put("ne", 8800);
put("equiv", 8801);
put("le", 8804);
put("ge", 8805);
put("sub", 8834);
put("sup", 8835);
put("nsub", 8836);
put("sube", 8838);
put("supe", 8839);
put("oplus", 8853);
put("otimes", 8855);
put("perp", 8869);
put("sdot", 8901);
put("lceil", 8968);
put("rceil", 8969);
put("lfloor", 8970);
put("rfloor", 8971);
put("lang", 9001);
put("rang", 9002);
put("loz", 9674);
put("spades", 9824);
put("clubs", 9827);
put("hearts", 9829);
put("diams", 9830);
put("quot", 34);
put("amp", 38);
put("lt", 60);
put("gt", 62);
put("OElig", 338);
put("oelig", 339);
put("Scaron", 352);
put("scaron", 353);
put("Yuml", 376);
put("circ", 710);
put("tilde", 732);
put("ensp", 8194);
put("emsp", 8195);
put("thinsp", 8201);
put("zwnj", 8204);
put("zwj", 8205);
put("lrm", 8206);
put("rlm", 8207);
put("ndash", 8211);
put("mdash", 8212);
put("lsquo", 8216);
put("rsquo", 8217);
put("sbquo", 8218);
put("ldquo", 8220);
put("rdquo", 8221);
put("bdquo", 8222);
put("dagger", 8224);
put("Dagger", 8225);
put("permil", 8240);
put("lsaquo", 8249);
put("rsaquo", 8250);
put("euro", 8364);
}
};
public static String escape(final String string) {
final StringBuffer sb = new StringBuffer(string.length());
// true if last char was blank
boolean lastWasBlankChar = false;
final int len = string.length();
for (int i = 0; i < len; i++) {
final char c = string.charAt(i);
if (c == ' ') {
// blank gets extra work,
// this solves the problem you get if you replace all
// blanks with , if you do that you loss
// word breaking
if (lastWasBlankChar) {
lastWasBlankChar = false;
sb.append(" ");
} else {
lastWasBlankChar = true;
sb.append(' ');
}
} else {
lastWasBlankChar = false;
// HTML Special Chars
switch (c) {
case '"':
sb.append(""");
break;
case '&':
sb.append("&");
break;
case '<':
sb.append("<");
break;
case '>':
sb.append(">");
break;
case '\n':
sb.append("<br/>");
break;
default:
final int ci = 0xffff & c;
if (ci < 160) {
// nothing special only 7 Bit
sb.append(c);
} else {
// Not 7 Bit use the unicode system
sb.append("&#");
sb.append(ci);
sb.append(';');
}
break;
}
}
}
return sb.toString();
}
/**
* Turn any HTML escape entities in the string into characters and return
* the resulting string.
*
* @param s String to be unescaped.
* @return unescaped String.
* @throws NullPointerException if s is null.
*
* @since ostermillerutils 1.00.00
*/
public static String unescape(String s) {
if (s == null) return null;
s = s.replaceAll("<br\\/>", "\n").replaceAll("<!--.*?--> |<[^>]+>", "");
final StringBuilder result = new StringBuilder();
int ampInd = s.indexOf("&");
int lastEnd = 0;
while (ampInd >= 0) {
final int nextAmp = s.indexOf("&", ampInd + 1);
final int nextSemi = s.indexOf(";", ampInd + 1);
if (nextSemi != -1 && (nextAmp == -1 || nextSemi < nextAmp)) {
int value = -1;
final String escape = s.substring(ampInd + 1, nextSemi);
try {
if (escape.startsWith("#")) {
value = Integer.parseInt(escape.substring(1), 10);
} else {
if (htmlEntities.containsKey(escape)) {
value = htmlEntities.get(escape);
}
}
} catch (final NumberFormatException e) {
// Ignore.
}
result.append(s.substring(lastEnd, ampInd));
lastEnd = nextSemi + 1;
if (value >= 0 && value <= 0xffff) {
result.append((char) value);
} else {
result.append("&").append(escape).append(";");
}
}
ampInd = nextAmp;
}
result.append(s.substring(lastEnd));
return result.toString();
}
}