/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
using System;
namespace Lucene.Net.Highlight
{
/// Simple {@link Encoder} implementation to escape text for HTML output
/// Nicko Cadell
///
///
public class SimpleHTMLEncoder : Encoder
{
public SimpleHTMLEncoder()
{
}
public virtual System.String EncodeText(System.String originalText)
{
return HtmlEncode(originalText);
}
/// Encode string into HTML
public static System.String HtmlEncode(System.String plainText)
{
if (plainText == null || plainText.Length == 0)
{
return "";
}
System.Text.StringBuilder result = new System.Text.StringBuilder(plainText.Length);
for (int index = 0; index < plainText.Length; index++)
{
char ch = plainText[index];
switch (ch)
{
case '"':
result.Append(""");
break;
case '&':
result.Append("&");
break;
case '<':
result.Append("<");
break;
case '>':
result.Append(">");
break;
default:
if (ch < 128)
{
result.Append(ch);
}
else
{
result.Append("").Append((int) ch).Append(";");
}
break;
}
}
return result.ToString();
}
}
}