/*
* Copyright (c) 1998-2011 Caucho Technology -- all rights reserved
*
* This file is part of Resin(R) Open Source
*
* Each copy or derived work must preserve the copyright notice and this
* notice unmodified.
*
* Resin Open Source 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.
*
* Resin Open Source 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, or any warranty
* of NON-INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with Resin Open Source; if not, write to the
*
* Free Software Foundation, Inc.
* 59 Temple Place, Suite 330
* Boston, MA 02111-1307 USA
*
* @author Scott Ferguson
*/
package com.caucho.util;
/**
* Html utils
*/
public class Html {
/**
* Escapes special symbols in a string. For example '<' becomes '<'
*/
public static String escapeHtml(String s)
{
if (s == null)
return null;
StringBuilder cb = new StringBuilder();
int lineCharacter = 0;
boolean startsWithSpace = false;
for (int i = 0; i < s.length(); i++) {
char ch = s.charAt(i);
lineCharacter++;
if (ch == '<')
cb.append("<");
else if (ch == '&')
cb.append("&");
else if (ch == '\n' || ch == '\r') {
lineCharacter = 0;
cb.append(ch);
startsWithSpace = false;
}
else if (lineCharacter > 70 && ch == ' ' && ! startsWithSpace) {
lineCharacter = 0;
cb.append('\n');
for (; i + 1 < s.length() && s.charAt(i + 1) == ' '; i++) {
}
}
else if (lineCharacter == 1 && (ch == ' ' || ch == '\t')) {
cb.append((char) ch);
startsWithSpace = true;
}
else
cb.append(ch);
}
return cb.toString();
}
}