private RTFStyleDescriptor GetRtfDescriptor(StyleIndex styleIndex)
{
List <Style> styles = new List <Style>();
//find text renderer
TextStyle textStyle = null;
int mask = 1;
bool hasTextStyle = false;
for (int i = 0; i < tb.Styles.Length; i++)
{
if (tb.Styles[i] != null && ((int)styleIndex & mask) != 0)
{
if (tb.Styles[i].IsExportable)
{
var style = tb.Styles[i];
styles.Add(style);
bool isTextStyle = style is TextStyle;
if (isTextStyle)
{
if (!hasTextStyle || tb.AllowSeveralTextStyleDrawing)
{
hasTextStyle = true;
textStyle = style as TextStyle;
}
}
}
}
mask = mask << 1;
}
//add TextStyle css
RTFStyleDescriptor result = null;
if (!hasTextStyle)
{
//draw by default renderer
result = tb.DefaultStyle.GetRTF();
}
else
{
result = textStyle.GetRTF();
}
return(result);
}
