public void SetSource(string source, int offset)
{
//System.Diagnostics.Debug.WriteLine(string.Format("Scan line {0}", _currentLine));
ScanLexer lexer = GetLexer();
if (lexer != null)
{
if (_currentLine >= 0 && source.Length > 0)
{
if (_source != null && _source.ProjectInfo != null)
{
var ret = _source.ProjectInfo.Engine.GetActiveEnv(_source.FileIndex, _currentLine + 1);
if (ret.Field0 != null)
{
_env = ret.Field0;
_type = ret.Field1;
}
}
}
lexer.SetLine(_currentLine + 1, source, offset, _env, _type);
}
}
/// <summary>
/// Get tokens of specified line.
/// </summary>
/// <param name="line">Line number which tokens it is necessary retrieve</param>
/// <param name="isForward">Direction of iteration (true is forward)</param>
/// <returns>Token list</returns>
List <ScanTokenInfo> GetLineTokens(int nline, bool isForward)
{
int line = nline - 1;
ScanState scanState = GetLineState(nline);
string lineText;
int index = line - _startBufferLine;
// читаем буферами по BufferLen стрк, чтобы ускорить работу
if (index < 0 || index >= _buffer.Length)
{
int start, end;
if (isForward)
{
end = Math.Min(_lineCount - 1, line + BufferLen);
start = line;
}
else
{
start = Math.Max(0, line - BufferLen);
end = line;
}
var str = Source.GetText(start, 0, end, Source.GetLineLength(end));
_buffer = str.Split(new string[] { "\r\n", "\n", "\r" }, StringSplitOptions.None);
_startBufferLine = start;
index = line - _startBufferLine;
}
lineText = _buffer[index];
Scanner.SetSource(lineText, 0);
Lex.SetLine(nline, lineText, 0, null, null);
List <ScanTokenInfo> lst = new List <ScanTokenInfo>();
foreach (ScanTokenInfo var in GetLineTokens(Lex, scanState))
{
lst.Add(var);
}
if (!isForward)
{
lst.Reverse();
}
return(lst);
}