Something

2183   nsCOMPtr<nsIPrefBranch> prefBranch =
2184     do_GetService(NS_PREFSERVICE_CONTRACTID, &rv);
2185   if (NS_SUCCEEDED(rv) && prefBranch)
2186     prefBranch->GetBoolPref("editor.quotesPreformatted", &quotesInPre);


2220       if (NS_SUCCEEDED(rv) && preNode)
2221       {
2222         // Add an attribute on the pre node so we'll know it's a quotation.
2223         // Do this after the insertion, so that 
2224         nsCOMPtr<nsIDOMElement> preElement (do_QueryInterface(preNode));
2225         if (preElement)
2226         {
2227           preElement->SetAttribute(NS_LITERAL_STRING("_moz_quote"),
2228                                    NS_LITERAL_STRING("true"));
2229           if (quotesInPre)
2230           {
2231             // set style to not have unwanted vertical margins
2232             preElement->SetAttribute(NS_LITERAL_STRING("style"),
2233                                      NS_LITERAL_STRING("margin: 0 0 0 0px;"));
2234           }
2235           else
2236           {
2237             // turn off wrapping on spans
2238             preElement->SetAttribute(NS_LITERAL_STRING("style"),
2239                                      NS_LITERAL_STRING("white-space: pre;"));
2240           }
2241         }
2242 
2243         // and set the selection inside it:
2244         selection->Collapse(preNode, 0);
2245       }