public override RTFStyleDescriptor GetRTF()
{
var result = new RTFStyleDescriptor();
if (BackgroundBrush is SolidBrush)
{
result.BackColor = (BackgroundBrush as SolidBrush).Color;
}
if (ForeBrush is SolidBrush)
{
result.ForeColor = (ForeBrush as SolidBrush).Color;
}
if ((FontStyle & FontStyle.Bold) != 0)
{
result.AdditionalTags += @"\b";
}
if ((FontStyle & FontStyle.Italic) != 0)
{
result.AdditionalTags += @"\i";
}
if ((FontStyle & FontStyle.Strikeout) != 0)
{
result.AdditionalTags += @"\strike";
}
if ((FontStyle & FontStyle.Underline) != 0)
{
result.AdditionalTags += @"\ul";
}
return(result);
}
private RTFStyleDescriptor GetRtfDescriptor(StyleIndex styleIndex)
{
var 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)
{
Style 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);
}
private void Flush(StringBuilder sb, StringBuilder tempSB, StyleIndex currentStyle)
{
//find textRenderer
if (tempSB.Length == 0)
{
return;
}
RTFStyleDescriptor desc = GetRtfDescriptor(currentStyle);
int cf = GetColorTableNumber(desc.ForeColor);
int cb = GetColorTableNumber(desc.BackColor);
var tags = new StringBuilder();
if (cf >= 0)
{
tags.AppendFormat(@"\cf{0}", cf);
}
if (cb >= 0)
{
tags.AppendFormat(@"\highlight{0}", cb);
}
if (!string.IsNullOrEmpty(desc.AdditionalTags))
{
tags.Append(desc.AdditionalTags.Trim());
}
if (tags.Length > 0)
{
sb.AppendFormat(@"{{{0} {1}}}", tags, tempSB);
}
else
{
sb.Append(tempSB);
}
tempSB.Length = 0;
}