/// <summary>
/// 对传入的字符串进行关键字替换，并返回还原特征字符串（如果传入的字符串为空，那么特征字符串也会为空，因为不需要对其进行版本控制）
/// </summary>
/// <param name="content"></param>
/// <returns></returns>
public string Replace(string value, out string newVersion, out string newRevertInfo)
{
InitRegex();
#if DEBUG
//System.Web.HttpContext.Current.Response.Write("<font style=\"size:26px;color:red\">注意，发生了关键字替换，请确认这不是BUG</font><br />");
#endif
if (string.IsNullOrEmpty(value) || m_ReplaceKeyWordRegex == null || m_ReplaceKeywords == null || m_ReplaceKeywords.Count == 0)
{
newVersion = Version;
newRevertInfo = string.Empty;
return(value);
}
int indexOffset = 0;
ReplacedWordCollection replacedWords = new ReplacedWordCollection();
string result = m_ReplaceKeyWordRegex.Replace(value, delegate(Match match)
{
object obj = m_ReplaceKeywords[match.Value];
if (obj != null)
{
string newWord = (string)obj;
int newLength = newWord.Length;
int newIndex = match.Index + indexOffset;
indexOffset += newLength - match.Length;
ReplacedWord word = new ReplacedWord();
word.Index = newIndex;
word.Length = newLength;
word.OriginalWord = match.Value;
replacedWords.Add(word);
return(newWord);
}
return(match.Value);
});
if (replacedWords.Count > 0)
{
newRevertInfo = replacedWords.ToString();
}
else
{
newRevertInfo = string.Empty;
}
newVersion = this.Version;
return(result);
}
/// <summary>
/// 根据传入的已被替换过的内容，以及恢复特征信息，恢复原始的内容
/// </summary>
/// <param name="value"></param>
/// <param name="revertInfo"></param>
/// <returns></returns>
public string Revert(string value, string version, string revertInfo)
{
if (string.IsNullOrEmpty(value))
{
return(string.Empty);
}
if (string.IsNullOrEmpty(revertInfo) || string.IsNullOrEmpty(version))
{
return(value);
}
ReplacedWordCollection words = ReplacedWordCollection.Parse(revertInfo);
if (words.Count == 0)
{
return(value);
}
int indexOffset = 0;
StringBuilder builder = new StringBuilder(value);
foreach (ReplacedWord item in words)
{
int newIndex = item.Index + indexOffset;
if (newIndex + item.Length > builder.Length)
{
break;
}
builder.Remove(newIndex, item.Length);
builder.Insert(newIndex, item.OriginalWord);
indexOffset += item.OriginalWord.Length - item.Length;
}
return(builder.ToString());
}
