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/** @file
* Drag and Drop manager.
*/
/*
* Copyright (C) 2011-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
#ifndef ___VBox_HostService_DnD_dndmanager_h
#define ___VBox_HostService_DnD_dndmanager_h
#include <VBox/HostServices/Service.h>
#include <VBox/HostServices/DragAndDropSvc.h>
#include <iprt/cpp/ministring.h>
#include <iprt/cpp/list.h>
typedef DECLCALLBACK(int) FNDNDPROGRESS(unsigned uPercentage, uint32_t uState, void *pvUser);
typedef FNDNDPROGRESS *PFNDNDPROGRESS;
/**
* DnD message class. This class forms the base of all other more specialized
* message classes.
*/
class DnDMessage
{
public:
DnDMessage()
: m_pNextMsg(NULL)
{
}
virtual ~DnDMessage()
{
clearNextMsg();
}
virtual HGCM::Message* nextHGCMMessage()
{
return m_pNextMsg;
}
virtual int currentMessageInfo(uint32_t *puMsg, uint32_t *pcParms)
{
AssertPtrReturn(puMsg, VERR_INVALID_POINTER);
AssertPtrReturn(pcParms, VERR_INVALID_POINTER);
if (!m_pNextMsg)
return VERR_NO_DATA;
*puMsg = m_pNextMsg->message();
*pcParms = m_pNextMsg->paramsCount();
return VINF_SUCCESS;
}
virtual int currentMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[])
{
if (!m_pNextMsg)
return VERR_NO_DATA;
int rc = m_pNextMsg->getData(uMsg, cParms, paParms);
clearNextMsg();
return rc;
}
virtual void clearNextMsg()
{
if (m_pNextMsg)
{
delete m_pNextMsg;
m_pNextMsg = NULL;
}
}
virtual bool isMessageWaiting() const { return m_pNextMsg != NULL; }
protected:
HGCM::Message *m_pNextMsg;
};
/**
* DnD message class for generic messages which didn't need any special
* handling.
*/
class DnDGenericMessage: public DnDMessage
{
public:
DnDGenericMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[])
{
m_pNextMsg = new HGCM::Message(uMsg, cParms, paParms);
}
};
/**
* DnD message class for informing the guest about a new drop data event.
*/
class DnDHGSendDataMessage: public DnDMessage
{
public:
DnDHGSendDataMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[], PFNDNDPROGRESS pfnProgressCallback, void *pvProgressUser);
~DnDHGSendDataMessage();
HGCM::Message* nextHGCMMessage();
int currentMessageInfo(uint32_t *puMsg, uint32_t *pcParms);
int currentMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[]);
bool isMessageWaiting() const { return !!m_pNextPathMsg; }
protected:
struct PathEntry
{
PathEntry(const RTCString &strHostPath, const RTCString &strGuestPath, uint32_t fMode, uint64_t cbSize)
: m_strHostPath(strHostPath)
, m_strGuestPath(strGuestPath)
, m_fMode(fMode)
, m_cbSize(cbSize) {}
RTCString m_strHostPath;
RTCString m_strGuestPath;
uint32_t m_fMode;
uint64_t m_cbSize;
};
bool hasFileUrls(const char *pcszFormat, size_t cbMax) const;
int buildFileTree(const char *pcszPath, size_t cbBaseLen);
static DECLCALLBACK(int) progressCallback(size_t cbDone, void *pvUser);
RTCList<PathEntry> m_uriList;
DnDMessage *m_pNextPathMsg;
/* Progress stuff */
size_t m_cbAll;
size_t m_cbTransfered;
PFNDNDPROGRESS m_pfnProgressCallback;
void *m_pvProgressUser;
};
/**
* DnD message class for informing the guest to cancel any currently and
* pending activities.
*/
class DnDHGCancelMessage: public DnDMessage
{
public:
DnDHGCancelMessage()
{
m_pNextMsg = new HGCM::Message(DragAndDropSvc::HOST_DND_HG_EVT_CANCEL, 0, 0);
}
};
/**
* DnD manager. Manage creation and queuing of messages for the various DnD
* messages types.
*/
class DnDManager
{
public:
DnDManager(PFNDNDPROGRESS pfnProgressCallback, void *pvProgressUser)
: m_pCurMsg(0)
, m_fOpInProcess(false)
, m_pfnProgressCallback(pfnProgressCallback)
, m_pvProgressUser(pvProgressUser)
{}
~DnDManager()
{
clear();
}
int addMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[]);
HGCM::Message *nextHGCMMessage();
int nextMessageInfo(uint32_t *puMsg, uint32_t *pcParms);
int nextMessage(uint32_t uMsg, uint32_t cParms, VBOXHGCMSVCPARM paParms[]);
void clear();
bool hasActiveOperation() const { return m_fOpInProcess; }
private:
DnDMessage *m_pCurMsg;
RTCList<DnDMessage*> m_dndMessageQueue;
bool m_fOpInProcess;
/* Progress stuff */
PFNDNDPROGRESS m_pfnProgressCallback;
void *m_pvProgressUser;
};
#endif /* ___VBox_HostService_DnD_dndmanager_h */
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