#region License
// Copyright (c) 2007 James Newton-King
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
#endregion
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;
namespace Newtonsoft.Utilities.Text
{
public static class StringExtensions
{
public static string RemoveHtml(this string s)
{
return RemoveHtmlInternal(s, null);
}
public static string RemoveHtml(this string s, IList removeTags)
{
if (removeTags == null)
throw new ArgumentNullException("removeTags");
return RemoveHtmlInternal(s, removeTags);
}
private static string RemoveHtmlInternal(string s, IList removeTags)
{
List removeTagsUpper = null;
if (removeTags != null)
{
removeTagsUpper = new List(removeTags.Count);
foreach (string tag in removeTags)
{
removeTagsUpper.Add(tag.ToUpperInvariant());
}
}
Regex anyTag = new Regex(@"<[/]{0,1}\s*(?\w*)\s*(?.*?=['""].*?[""'])*?\s*[/]{0,1}>", RegexOptions.Compiled);
return anyTag.Replace(s, delegate(Match match)
{
string tag = match.Groups["tag"].Value.ToUpperInvariant();
if (removeTagsUpper == null)
return string.Empty;
else if (removeTagsUpper.Contains(tag))
return string.Empty;
else
return match.Value;
});
}
}
}