Bug #10802 --> in order to implement open attachment i need the mail news channels to implement set owner

and set/get contenttype
r=sspitzer

mailnews/base/util/nsMsgProtocol.cpp

@@ -419,14 +419,17 @@ NS_IMETHODIMP nsMsgProtocol::GetContentType(char * *aContentType)
   // us to optimize the case where the message url actual refers to  
   // a part in the message that has a content type that is not message/rfc822
 
-	*aContentType = nsCRT::strdup("message/rfc822");
+  if (m_ContentType.IsEmpty())
+	  *aContentType = nsCRT::strdup("message/rfc822");
+  else
+    *aContentType = m_ContentType.ToNewCString();
 	return NS_OK;
 }
 
 NS_IMETHODIMP nsMsgProtocol::SetContentType(const char *aContentType)
 {
-    // XXX: Do not allow the content type to be changed (yet)
-    return NS_ERROR_FAILURE;
+    m_ContentType = aContentType;
+    return NS_OK;
 }
 
 NS_IMETHODIMP nsMsgProtocol::GetContentLength(PRInt32 * aContentLength)
@@ -521,14 +524,15 @@ nsMsgProtocol::SetPipeliningAllowed(PRBool aPipeliningAllowed)
 
 NS_IMETHODIMP nsMsgProtocol::GetOwner(nsISupports * *aPrincipal)
 {
-    *aPrincipal = nsnull;
+  *aPrincipal = mOwner;
+  NS_IF_ADDREF(*aPrincipal);
 	return NS_OK;
 }
 
 NS_IMETHODIMP nsMsgProtocol::SetOwner(nsISupports * aPrincipal)
 {
-    NS_NOTREACHED("SetOwner");
-	return NS_ERROR_NOT_IMPLEMENTED;
+  mOwner = aPrincipal;
+	return NS_OK;
 }
 
 NS_IMETHODIMP nsMsgProtocol::GetLoadGroup(nsILoadGroup * *aLoadGroup)

mailnews/base/util/nsMsgProtocol.h

@@ -117,6 +117,8 @@ protected:
   nsLoadFlags                 mLoadAttributes;
   nsCOMPtr<nsIProgressEventSink> mProgressEventSink;
   nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
+  nsCOMPtr<nsISupports>       mOwner;
+  nsCString                   m_ContentType;
 };
 
 #endif /* nsMsgProtocol_h__ */

mailnews/imap/src/nsImapProtocol.cpp

@@ -6770,14 +6770,17 @@ NS_IMETHODIMP nsImapMockChannel::SetLoadAttributes(nsLoadFlags aLoadAttributes)
 
 NS_IMETHODIMP nsImapMockChannel::GetContentType(char * *aContentType)
 {
-  *aContentType = nsCRT::strdup("message/rfc822");
+  if (m_ContentType.IsEmpty())
+    *aContentType = nsCRT::strdup("message/rfc822");
+  else
+    *aContentType = m_ContentType.ToNewCString();
   return NS_OK;
 }
 
 NS_IMETHODIMP nsImapMockChannel::SetContentType(const char *aContentType)
 {
-  // Do not allow the content-type to change.
-  return NS_ERROR_FAILURE;
+  m_ContentType = aContentType;
+  return NS_OK;
 }
 
 NS_IMETHODIMP nsImapMockChannel::GetContentLength(PRInt32 * aContentLength)
@@ -6872,14 +6875,15 @@ nsImapMockChannel::SetPipeliningAllowed(PRBool aPipeliningAllowed)
 
 NS_IMETHODIMP nsImapMockChannel::GetOwner(nsISupports * *aPrincipal)
 {
-  *aPrincipal = nsnull;
+  *aPrincipal = mOwner;
+  NS_IF_ADDREF(*aPrincipal);
   return NS_OK;
 }
 
 NS_IMETHODIMP nsImapMockChannel::SetOwner(nsISupports * aPrincipal)
 {
-    NS_NOTREACHED("nsImapMockChannel::SetOwner");
-    return NS_ERROR_NOT_IMPLEMENTED;
+    mOwner = aPrincipal;
+    return NS_OK;
 }
 
 ////////////////////////////////////////////////////////////////////////////////

mailnews/imap/src/nsImapProtocol.h

@@ -602,6 +602,8 @@ protected:
   nsLoadFlags mLoadAttributes;
   nsCOMPtr<nsIProgressEventSink> mProgressEventSink;
   nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
+  nsCOMPtr<nsISupports> mOwner;
+  nsCString m_ContentType;
 };
 
 #endif  // nsImapProtocol_h___