FairyGUI.TextField.GetLinesShape C# (CSharp) Method

        public void GetLinesShape(int startLine, float startCharX, int endLine, float endCharX,
            bool clipped,
            List<Rect> resultRects)
        {
            LineInfo line1 = _lines[startLine];
            LineInfo line2 = _lines[endLine];
            if (startLine == endLine)
            {
                Rect r = Rect.MinMaxRect(startCharX, line1.y, endCharX, line1.y + line1.height);
                if (clipped)
                    resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                else
                    resultRects.Add(r);
            }
            else if (startLine == endLine - 1)
            {
                Rect r = Rect.MinMaxRect(startCharX, line1.y, GUTTER_X + line1.width, line1.y + line1.height);
                if (clipped)
                    resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                else
                    resultRects.Add(r);
                r = Rect.MinMaxRect(GUTTER_X, line1.y + line1.height, endCharX, line2.y + line2.height);
                if (clipped)
                    resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                else
                    resultRects.Add(r);
            }
            else
            {
                Rect r = Rect.MinMaxRect(startCharX, line1.y, GUTTER_X + line1.width, line1.y + line1.height);
                if (clipped)
                    resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                else
                    resultRects.Add(r);
                for (int i = startLine + 1; i < endLine; i++)
                {
                    LineInfo line = _lines[i];
                    r = Rect.MinMaxRect(GUTTER_X, r.yMax, GUTTER_X + line.width, line.y + line.height);
                    if (clipped)
                        resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                    else
                        resultRects.Add(r);
                }
                r = Rect.MinMaxRect(GUTTER_X, r.yMax, endCharX, line2.y + line2.height);
                if (clipped)
                    resultRects.Add(ToolSet.Intersection(ref r, ref _contentRect));
                else
                    resultRects.Add(r);
            }
        }