void BuildBuffer( )
{
StringBuilder buf = new StringBuilder();
mBufferLineList = new List <ParseBufferLine>();
int lineNx = 0;
foreach (string lineText in mLines)
{
// buffer line text includes the newline pattern at the end.
string s1 = lineText + Environment.NewLine;
// add to the buffer xref list.
ParseBufferLine bl = new ParseBufferLine(s1, lineNx, buf.Length);
mBufferLineList.Add(bl);
// add to the buffer itself.
buf.Append(s1);
// inc to next line nbr.
lineNx += 1;
}
// store the concatenated string buffer.
mBuffer = buf.ToString();
}
/// <summary>
/// Find the BufferLine which contains the searched for buffer pos.
/// </summary>
/// <param name="InPos"></param>
/// <returns></returns>
public ParseBufferLine FindBufferLine(int BufferPos)
{
int ix = mLookupIx;
ParseBufferLine bufLine = null;
if (ix == -1)
{
ix = 0;
}
while (true)
{
if ((ix >= mBufferLineList.Count) || (ix < 0))
{
bufLine = null;
break;
}
bufLine = mBufferLineList[ix];
// pos to search for is before current buffer line.
if (BufferPos < bufLine.BufferPos)
{
ix = ix - 1;
}
// the pos to search for is after current buffer line.
else if (BufferPos > bufLine.BufferEndPos)
{
ix = ix + 1;
}
// line found. save the index for next search. then exit loop.
else
{
mLookupIx = ix;
break;
}
}
return(bufLine);
}