add interface for set/get body

mailnews/compose/public/nsIMsgCompFields.h

@@ -190,6 +190,12 @@ class nsIMsgCompFields : public nsISupports {
 
   /*  <IDL>  */
   NS_IMETHOD GetAttachVCard(PRBool *_retval) = 0;
+
+  /*  <IDL>  */
+  NS_IMETHOD SetBody(const char *value, PRInt32 *_retval) = 0;
+
+  /*  <IDL>  */
+  NS_IMETHOD GetBody(char **_retval) = 0;
 };
 
 #endif /* __gen_nsImsgCompFields_h__ */

mailnews/compose/public/nsIMsgCompFields.idl

@@ -107,5 +107,8 @@ interface nsIMsgCompFields : nsISupports {
 
 	long SetAttachVCard(in boolean value);
 	boolean GetAttachVCard();
+
+	long SetBody(in string value);
+	string GetBody();
 };