// virtual void SCI_METHOD Lex(Sci_PositionU startPos, i64 lengthDoc, int initStyle, IDocument *pAccess) = 0;
public static void Lex(IntPtr instance, UIntPtr start_pos, IntPtr length_doc, int init_style, IntPtr p_access)
{
/* main lexing method.
* start_pos is always the startposition of a line
* length_doc is NOT the total length of a document but the size of the text to be styled
* init_style is the style of last styled byte
* p_access is the pointer of the IDocument cpp class
*/
int start = (int)start_pos;
int length = (int)length_doc;
IntPtr range_ptr = editor.GetRangePointer(start, length);
string content = Marshal.PtrToStringAnsi(range_ptr, length);
for (int i = 0; i < length; i++)
{
int start_position = i;
string tag = "";
int idx = 0;
if (i + 2 < length)
{
tag = content.Substring(i, 3);
}
if (Segs1.Contains(tag))
{
idx = 3;
}
else if (Segs2.Contains(tag))
{
idx = 5;
}
else if (Segs3.Contains(tag))
{
idx = 6;
}
else if (Segs4.Contains(tag))
{
idx = 7;
}
while (i < length)
{
// read rest of the line
if (content[i] == '\n')
{
break;
}
i++;
}
// style this line
editor.StartStyling(start + start_position, 0);
editor.SetStyling(i - start_position, idx);
}
}
