| using System.Text; |
| |
| namespace Lucene.Net.Search.Highlight |
| { |
| /* |
| * 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. |
| */ |
| |
| /// <summary> |
| /// Simple <see cref="IEncoder"/> implementation to escape text for HTML output |
| /// </summary> |
| public class SimpleHTMLEncoder : IEncoder |
| { |
| public SimpleHTMLEncoder() |
| { |
| } |
| |
| public string EncodeText(string originalText) |
| { |
| return HtmlEncode(originalText); |
| } |
| |
| /// <summary> |
| /// Encode string into HTML |
| /// </summary> |
| public static string HtmlEncode(string plainText) |
| { |
| if (string.IsNullOrEmpty(plainText)) |
| { |
| return string.Empty; |
| } |
| |
| var result = new 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; |
| |
| case '\'': |
| result.Append("'"); |
| break; |
| |
| case '/': |
| result.Append("/"); |
| break; |
| |
| default: |
| // LUCENENET TODO: This logic appears to be correct, but need to |
| // verify and create/alter unit tests to accommodate this change |
| if (ch < 128) |
| { |
| result.Append(ch); |
| } |
| else |
| { |
| result.Append("&#").Append((int)ch).Append(";"); |
| } |
| break; |
| } |
| } |
| |
| return result.ToString(); |
| } |
| } |
| } |