public static int GetLineLength(this StringBuilder sb, int line)
{
int lineIndex = sb.FindLineIndex(line);
int afterLineIndex = sb.FindLineIndex(line + 1);
int length = afterLineIndex - lineIndex;
return(length);
}
public static StringBuilder MoveCursorToLineStart(this StringBuilder sb)
{
int cursorLine = sb.FindIndexLine(sb.FindCursorIndex());
int index = sb.FindLineIndex(cursorLine);
sb.RemoveCursor().AddCursorIndex(index);
return(sb);
}
public static StringBuilder AddCursor(this StringBuilder sb, int line)
{
return(sb.Insert(sb.FindLineIndex(line + 1), cursor));
}
public static StringBuilder NewLine(this StringBuilder sb, int line, string value)
{
sb.RemoveCursor().Insert(sb.FindLineIndex(line), $"{Environment.NewLine}{value}").AddCursor(line + 1);
return(sb);
}
public static StringBuilder NewLine(this StringBuilder sb, int line)
{
return(sb.RemoveCursor().Insert(sb.FindLineIndex(line), Environment.NewLine).AddCursor(line + 1));
}