/* $Id: ClipboardProvider.cpp 79174 2019-06-17 10:30:49Z vboxsync $ */
/** @file
 * Shared Clipboard - Provider base class implementation.
 */

/*
 * Copyright (C) 2019 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.
 */


/*********************************************************************************************************************************
*   Header Files                                                                                                                 *
*********************************************************************************************************************************/
#define LOG_GROUP LOG_GROUP_SHARED_CLIPBOARD
#include <VBox/GuestHost/SharedClipboard-uri.h>

#include <iprt/asm.h>
#include <iprt/assert.h>
#include <iprt/dir.h>
#include <iprt/errcore.h>
#include <iprt/file.h>
#include <iprt/path.h>
#include <iprt/string.h>


#include <VBox/log.h>



SharedClipboardProvider::SharedClipboardProvider(void)
    : m_cRefs(0)
{
    LogFlowFuncEnter();
}

SharedClipboardProvider::~SharedClipboardProvider(void)
{
    LogFlowFuncEnter();
    Assert(m_cRefs == 0);
}

/**
 * Creates a Shared Clipboard provider.
 *
 * @returns New Shared Clipboard provider instance.
 * @param   pCtx                Pointer to creation context.
 */
/* static */
SharedClipboardProvider *SharedClipboardProvider::Create(PSHAREDCLIPBOARDPROVIDERCREATIONCTX pCtx)
{
    AssertPtrReturn(pCtx, NULL);

    SharedClipboardProvider *pProvider = NULL;

    switch (pCtx->enmSource)
    {
#ifdef VBOX_WITH_SHARED_CLIPBOARD_GUEST
        case SHAREDCLIPBOARDPROVIDERSOURCE_VBGLR3:
            pProvider = new SharedClipboardProviderVbglR3(pCtx->u.VbglR3.uClientID);
            break;
#endif

#ifdef VBOX_WITH_SHARED_CLIPBOARD_HOST
        case SHAREDCLIPBOARDPROVIDERSOURCE_HOSTSERVICE:
            pProvider = new SharedClipboardProviderHostService();
            break;
#endif
        default:
            AssertFailed();
            break;
    }

    if (pProvider)
        pProvider->SetCallbacks(pCtx->pCallbacks);

    return pProvider;
}

/**
 * Adds a reference to a Shared Clipboard provider.
 *
 * @returns New reference count.
 */
uint32_t SharedClipboardProvider::AddRef(void)
{
    LogFlowFuncEnter();
    return ASMAtomicIncU32(&m_cRefs);
}

/**
 * Removes a reference from a Shared Clipboard cache.
 *
 * @returns New reference count.
 */
uint32_t SharedClipboardProvider::Release(void)
{
    LogFlowFuncEnter();
    Assert(m_cRefs);
    return ASMAtomicDecU32(&m_cRefs);
}

/**
 * Sets or unsets the callback table to be used for a clipboard provider.
 *
 * @returns VBox status code.
 * @param   pCallbacks          Pointer to callback table to set. Specify NULL to unset existing callbacks.
 */
void SharedClipboardProvider::SetCallbacks(PSHAREDCLIPBOARDPROVIDERCALLBACKS pCallbacks)
{
    /* pCallbacks might be NULL to unset callbacks. */

    LogFlowFunc(("pCallbacks=%p\n", pCallbacks));

    if (pCallbacks)
    {
        m_Callbacks = *pCallbacks;
    }
    else
        RT_ZERO(m_Callbacks);
}

/*
 * Stubs.
 */

int SharedClipboardProvider::ReadDataHdr(PVBOXCLIPBOARDDATAHDR pDataHdr)
{
    RT_NOREF(pDataHdr);
    return VERR_NOT_IMPLEMENTED;
}

int SharedClipboardProvider::WriteDataHdr(const PVBOXCLIPBOARDDATAHDR pDataHdr)
{
    RT_NOREF(pDataHdr);
    return VERR_NOT_IMPLEMENTED;
}

int SharedClipboardProvider::ReadDataChunk(const PVBOXCLIPBOARDDATAHDR pDataHdr, void *pvChunk, uint32_t cbChunk,
                                           uint32_t *pcbRead, uint32_t fFlags /* = 0 */)
{
    RT_NOREF(pDataHdr, pvChunk, cbChunk, pcbRead, fFlags);
    return VERR_NOT_IMPLEMENTED;
}

int SharedClipboardProvider::WriteDataChunk(const PVBOXCLIPBOARDDATAHDR pDataHdr, const void *pvChunk, uint32_t cbChunk,
                                            uint32_t *pcbWritten, uint32_t fFlags /* = 0 */)
{
    RT_NOREF(pDataHdr, pvChunk, cbChunk, pcbWritten, fFlags);
    return VERR_NOT_IMPLEMENTED;
}

int SharedClipboardProvider::ReadDirectory(PVBOXCLIPBOARDDIRDATA pDirData)
{
    RT_NOREF(pDirData);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::WriteDirectory(const PVBOXCLIPBOARDDIRDATA pDirData)
{
    RT_NOREF(pDirData);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::ReadFileHdr(PVBOXCLIPBOARDFILEHDR pFileHdr)
{
    RT_NOREF(pFileHdr);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::WriteFileHdr(const PVBOXCLIPBOARDFILEHDR pFileHdr)
{
    RT_NOREF(pFileHdr);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::ReadFileData(PVBOXCLIPBOARDFILEDATA pFileData, uint32_t *pcbRead)
{
    RT_NOREF(pFileData, pcbRead);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::WriteFileData(const PVBOXCLIPBOARDFILEDATA pFileData, uint32_t *pcbWritten)
{
    RT_NOREF(pFileData, pcbWritten);

    LogFlowFuncEnter();

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

void SharedClipboardProvider::Reset(void)
{
}

int SharedClipboardProvider::OnRead(PSHAREDCLIPBOARDPROVIDERREADPARMS pParms)
{
    RT_NOREF(pParms);

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}

int SharedClipboardProvider::OnWrite(PSHAREDCLIPBOARDPROVIDERWRITEPARMS pParms)
{
    RT_NOREF(pParms);

    int rc = VERR_NOT_IMPLEMENTED;

    LogFlowFuncLeaveRC(rc);
    return rc;
}