/// <summary>
/// 在文本中查找所有的关键字
/// </summary>
/// <param name="text">文本</param>
/// <returns></returns>
public virtual List <IllegalWordsSearchResult> FindAll(string text)
{
List <IllegalWordsSearchResult> result = new List <IllegalWordsSearchResult>();
TrieNode ptr = null;
char pChar = (char)0;
for (int i = 0; i < text.Length; i++)
{
char c = ToSenseWord(text[i]);
if (_skipBitArray[c])
{
continue;
}
TrieNode tn;
if (ptr == null)
{
tn = _first[c];
}
else if (ptr.TryGetValue(c, out tn) == false)
{
tn = (c != pChar) ? _first[c] : ptr;
}
if (tn != null)
{
if (ptr != tn)
{
tn.LastMatchLocation = i;
tn.Parent = ptr;
}
if (tn.End)
{
foreach (var find in tn.Results)
{
var p = tn.GetParent(find.Length - 1);
var r = new IllegalWordsSearchResult(find, p.LastMatchLocation, i, text);
result.Add(r);
}
}
}
ptr = tn;
pChar = c;
}
return(result);
}
/// <summary>
/// 从文本中查找到第一个关键字
/// </summary>
/// <param name="text"></param>
/// <returns></returns>
public override IllegalWordsSearchResult FindFirst(string text)
{
IllegalWordsSearchResult result = null;
search(text, (keyword, ch, end) => {
var start = end + 1 - keyword.Length;
result = GetIllegalResult(keyword, ch, start, end, text, text);
return(result != null);
});
if (result != null)
{
return(result);
}
var searchText = WordsHelper.ToSenseIllegalWords(text);
search(searchText, (keyword, ch, end) => {
var start = end + 1 - keyword.Length;
result = GetIllegalResult(keyword, ch, start, end, text, searchText);
return(result != null);
});
if (result != null)
{
return(result);
}
searchText = WordsHelper.RemoveNontext(searchText);
search(searchText, (keyword, ch, end) => {
var start = end;
for (int i = 0; i < keyword.Length; i++)
{
var n = searchText[start--];
while (n == 1)
{
n = searchText[start--];
}
}
start++;
result = GetIllegalResult(keyword, ch, start, end, text, searchText);
return(result != null);
});
if (result != null)
{
return(result);
}
return(IllegalWordsSearchResult.Empty);
}