gecko-dev/lib/libmsg/msgoffnw.cpp

90 lines
2.4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#include "msg.h"
#include "msgoffnw.h"
#include "msgpane.h"
#include "msgfinfo.h"
#include "newsdb.h"
#include "newshdr.h"
extern "C"
{
extern int MK_NEWS_ITEM_UNAVAILABLE;
}
MSG_OfflineNewsArtState::MSG_OfflineNewsArtState(MSG_Pane *pane,
const char * /*group*/,
uint32 messageNumber)
{
m_pane = pane;
m_bytesReadSoFar = 0;
if (!pane->GetFolder() || !pane->GetFolder()->IsNews())
return ;
MessageDBView *view = pane->GetMsgView();
if (!view)
return ;
m_newsDB = view->GetDB()->GetNewsDB();
if (m_newsDB)
{
m_newsHeader = m_newsDB->GetNewsHdrForKey(messageNumber);
m_articleLength = (m_newsHeader) ? m_newsHeader->GetOfflineMessageLength(m_newsDB->GetDB()) : 0;
}
else
m_newsHeader = NULL;
}
MSG_OfflineNewsArtState::~MSG_OfflineNewsArtState()
{
delete m_newsHeader;
}
// Returns negative error codes for errors, 0 for done, positive number
// for number of bytes read.
int MSG_OfflineNewsArtState::Process(char *outputBuffer, int outputBufSize)
{
int32 bytesRead;
if (!m_newsHeader)
return MK_NEWS_ITEM_UNAVAILABLE;
if (m_bytesReadSoFar >= m_articleLength)
{
// m_newsHeader->OrFlags(kOffline); // eh? we're pulling it out of the db - no need to change flag
return 0;
}
int bytesToCopy = MIN(outputBufSize, m_articleLength - m_bytesReadSoFar);
bytesRead = m_newsHeader->ReadFromArticle(outputBuffer, bytesToCopy, m_bytesReadSoFar, m_newsDB->GetDB());
m_bytesReadSoFar += bytesRead;
return bytesRead;
}
int MSG_OfflineNewsArtState::Interrupt()
{
if (m_newsHeader != NULL)
{
delete m_newsHeader;
m_newsHeader = NULL;
}
return 0;
}