AGS.Editor.ScintillaWrapper.FindTypeForThis C# (CSharp) Метод

        private string FindTypeForThis(int startAtPos)
        {
            if (_fixedTypeForThisKeyword != null)
            {
                return _fixedTypeForThisKeyword;
            }
            int lineNumber = scintillaControl1.LineFromPosition(startAtPos) - 1;
            int searchBackUntil = (lineNumber > SCAN_BACK_DISTANCE) ? lineNumber - SCAN_BACK_DISTANCE : 0;
            while (lineNumber > searchBackUntil)
            {
                string lineText = scintillaControl1.GetLine(lineNumber);
                int structNameEnd = lineText.IndexOf("::");
                if (structNameEnd >= 0)
                {
                    int structNameStart = structNameEnd - 1;
                    while ((structNameStart >= 0) && (Char.IsLetterOrDigit(lineText[structNameStart]) || (lineText[structNameStart] == '_')))
                    {
                        structNameStart--;
                    }
                    structNameStart++;
                    return lineText.Substring(structNameStart, structNameEnd - structNameStart);
                }
                int extenderFunction = lineText.IndexOf("(this ");
                if (extenderFunction >= 0)
                {
                    int structNameStart = extenderFunction + 5;
                    while (lineText[structNameStart] == ' ')
                    {
                        structNameStart++;
                    }
                    structNameEnd = structNameStart + 1;
                    while (Char.IsLetterOrDigit(lineText[structNameEnd]))
                    {
                        structNameEnd++;
                    }
                    return lineText.Substring(structNameStart, structNameEnd - structNameStart);
                }
                if (lineText.IndexOf("function ") >= 0)
                {
                    // we're in a function that wasn't a struct member
                    break;
                }
                lineNumber--;
            }
            return string.Empty;
        }