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/*
* OLE 2 clipboard support
*
* Copyright 1999 Noel Borthwick <noel@macadamian.com>
* Copyright 2000 Abey George <abey@macadamian.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES:
* This file contains the implementation for the OLE Clipboard and its
* internal interfaces. The OLE clipboard interacts with an IDataObject
* interface via the OleSetClipboard, OleGetClipboard and
* OleIsCurrentClipboard API's. An internal IDataObject delegates
* to a client supplied IDataObject or the WIN32 clipboard API depending
* on whether OleSetClipboard has been invoked.
* Here are some operating scenarios:
*
* 1. OleSetClipboard called: In this case the internal IDataObject
* delegates to the client supplied IDataObject. Additionally OLE takes
* ownership of the Windows clipboard and any HGLOCBAL IDataObject
* items are placed on the Windows clipboard. This allows non OLE aware
* applications to access these. A local WinProc fields WM_RENDERFORMAT
* and WM_RENDERALLFORMATS messages in this case.
*
* 2. OleGetClipboard called without previous OleSetClipboard. Here the internal
* IDataObject functionality wraps around the WIN32 clipboard API.
*
* 3. OleGetClipboard called after previous OleSetClipboard. Here the internal
* IDataObject delegates to the source IDataObjects functionality directly,
* thereby bypassing the Windows clipboard.
*
* Implementation references : Inside OLE 2'nd edition by Kraig Brockschmidt
*
* TODO:
* - Support for pasting between different processes. OLE clipboard support
* currently works only for in process copy and paste. Since we internally
* store a pointer to the source's IDataObject and delegate to that, this
* will fail if the IDataObject client belongs to a different process.
* - IDataObject::GetDataHere is not implemented
* - OleFlushClipboard needs to additionally handle TYMED_IStorage media
* by copying the storage into global memory. Subsequently the default
* data object exposed through OleGetClipboard must convert this TYMED_HGLOBAL
* back to TYMED_IStorage.
* - OLE1 compatibility formats to be synthesized from OLE2 formats and put on
* clipboard in OleSetClipboard.
*
*/
#include <assert.h>
#include <stdarg.h>
#include <string.h>
#define COBJMACROS
#define NONAMELESSUNION
#define NONAMELESSSTRUCT
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "winnls.h"
#include "ole2.h"
#include "wine/debug.h"
#include "olestd.h"
#include "storage32.h"
#include "compobj_private.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
#define HANDLE_ERROR(err) do { hr = err; TRACE("(HRESULT=%x)\n", (HRESULT)err); goto CLEANUP; } while (0)
/****************************************************************************
* ole_clipbrd
*/
struct ole_clipbrd
{
const IDataObjectVtbl* lpvtbl; /* Exposed IDataObject vtable */
LONG ref;
HWND hWndClipboard; /* Hidden clipboard window */
IDataObject* pIDataObjectSrc; /* Source object passed to OleSetClipboard */
};
typedef struct ole_clipbrd ole_clipbrd;
static inline ole_clipbrd *impl_from_IDataObject(IDataObject *iface)
{
return (ole_clipbrd*)((char*)iface - FIELD_OFFSET(ole_clipbrd, lpvtbl));
}
typedef struct PresentationDataHeader
{
BYTE unknown1[28];
DWORD dwObjectExtentX;
DWORD dwObjectExtentY;
DWORD dwSize;
} PresentationDataHeader;
/*
* The one and only ole_clipbrd object which is created by OLEClipbrd_Initialize()
*/
static ole_clipbrd* theOleClipboard;
/*
* Name of our registered OLE clipboard window class
*/
static const CHAR OLEClipbrd_WNDCLASS[] = "CLIPBRDWNDCLASS";
static UINT dataobject_clipboard_format;
static UINT ole_priv_data_clipboard_format;
/* Structure of 'Ole Private Data' clipboard format */
typedef struct
{
FORMATETC fmtetc;
DWORD first_use; /* Has this cf been added to the list already */
DWORD unk[2];
} ole_priv_data_entry;
typedef struct
{
DWORD unk1;
DWORD size; /* in bytes of the entire structure */
DWORD unk2;
DWORD count; /* no. of format entries */
DWORD unk3[2];
ole_priv_data_entry entries[1]; /* array of size count */
/* then follows any DVTARGETDEVICE structures referenced in the FORMATETCs */
} ole_priv_data;
/* Create an empty data structure. The only thing that really matters
here is setting count and size members. This is used by the enumerator as a
convenience when there's an empty list. */
static HRESULT create_empty_priv_data(ole_priv_data **data)
{
ole_priv_data *ptr;
*data = NULL;
ptr = HeapAlloc(GetProcessHeap(), 0, sizeof(*ptr));
if(!ptr) return E_OUTOFMEMORY;
ptr->size = sizeof(*ptr);
ptr->count = 0;
*data = ptr;
return S_OK;
}
/*---------------------------------------------------------------------*
* Implementation of the internal IEnumFORMATETC interface returned by
* the OLE clipboard's IDataObject.
*---------------------------------------------------------------------*/
typedef struct enum_fmtetc
{
const IEnumFORMATETCVtbl *lpVtbl;
LONG ref;
UINT pos; /* current enumerator position */
ole_priv_data *data;
} enum_fmtetc;
static inline enum_fmtetc *impl_from_IEnumFORMATETC(IEnumFORMATETC *iface)
{
return (enum_fmtetc*)((char*)iface - FIELD_OFFSET(enum_fmtetc, lpVtbl));
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_QueryInterface (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_QueryInterface
(LPENUMFORMATETC iface, REFIID riid, LPVOID* ppvObj)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(IID: %s, %p)\n", This, debugstr_guid(riid), ppvObj);
*ppvObj = NULL;
if(IsEqualIID(riid, &IID_IUnknown) ||
IsEqualIID(riid, &IID_IEnumFORMATETC))
{
*ppvObj = iface;
}
if(*ppvObj)
{
IEnumFORMATETC_AddRef((IEnumFORMATETC*)*ppvObj);
TRACE("-- Interface: (%p)->(%p)\n",ppvObj,*ppvObj);
return S_OK;
}
TRACE("-- Interface: E_NOINTERFACE\n");
return E_NOINTERFACE;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_AddRef (IUnknown)
*
*/
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_AddRef(LPENUMFORMATETC iface)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(count=%u)\n",This, This->ref);
return InterlockedIncrement(&This->ref);
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Release (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_Release(LPENUMFORMATETC iface)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
ULONG ref;
TRACE("(%p)->(count=%u)\n",This, This->ref);
ref = InterlockedDecrement(&This->ref);
if (!ref)
{
TRACE("() - destroying IEnumFORMATETC(%p)\n",This);
HeapFree(GetProcessHeap(), 0, This->data);
HeapFree(GetProcessHeap(), 0, This);
}
return ref;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Next (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Next
(LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
UINT cfetch, i;
HRESULT hres = S_FALSE;
TRACE("(%p)->(pos=%u)\n", This, This->pos);
if (This->pos < This->data->count)
{
cfetch = This->data->count - This->pos;
if (cfetch >= celt)
{
cfetch = celt;
hres = S_OK;
}
for(i = 0; i < cfetch; i++)
{
rgelt[i] = This->data->entries[This->pos++].fmtetc;
if(rgelt[i].ptd)
{
DVTARGETDEVICE *target = (DVTARGETDEVICE *)((char *)This->data + (DWORD)rgelt[i].ptd);
rgelt[i].ptd = CoTaskMemAlloc(target->tdSize);
if(!rgelt[i].ptd) return E_OUTOFMEMORY;
memcpy(rgelt[i].ptd, target, target->tdSize);
}
}
}
else
{
cfetch = 0;
}
if (pceltFethed)
{
*pceltFethed = cfetch;
}
return hres;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Skip (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Skip(LPENUMFORMATETC iface, ULONG celt)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->(num=%u)\n", This, celt);
This->pos += celt;
if (This->pos > This->data->count)
{
This->pos = This->data->count;
return S_FALSE;
}
return S_OK;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Reset (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Reset(LPENUMFORMATETC iface)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
TRACE("(%p)->()\n", This);
This->pos = 0;
return S_OK;
}
static HRESULT enum_fmtetc_construct(ole_priv_data *data, UINT pos, IEnumFORMATETC **obj);
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Clone (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone
(LPENUMFORMATETC iface, LPENUMFORMATETC* obj)
{
enum_fmtetc *This = impl_from_IEnumFORMATETC(iface);
ole_priv_data *new_data;
TRACE("(%p)->(%p)\n", This, obj);
if ( !obj ) return E_INVALIDARG;
*obj = NULL;
new_data = HeapAlloc(GetProcessHeap(), 0, This->data->size);
if(!new_data) return E_OUTOFMEMORY;
return enum_fmtetc_construct(new_data, This->pos, obj);
}
static const IEnumFORMATETCVtbl efvt =
{
OLEClipbrd_IEnumFORMATETC_QueryInterface,
OLEClipbrd_IEnumFORMATETC_AddRef,
OLEClipbrd_IEnumFORMATETC_Release,
OLEClipbrd_IEnumFORMATETC_Next,
OLEClipbrd_IEnumFORMATETC_Skip,
OLEClipbrd_IEnumFORMATETC_Reset,
OLEClipbrd_IEnumFORMATETC_Clone
};
/************************************************************************
* enum_fmtetc_construct
*
* Creates an IEnumFORMATETC enumerator from ole_priv_data which it then owns.
*/
static HRESULT enum_fmtetc_construct(ole_priv_data *data, UINT pos, IEnumFORMATETC **obj)
{
enum_fmtetc* ef;
*obj = NULL;
ef = HeapAlloc(GetProcessHeap(), 0, sizeof(*ef));
if (!ef) return E_OUTOFMEMORY;
ef->ref = 1;
ef->lpVtbl = &efvt;
ef->data = data;
ef->pos = pos;
TRACE("(%p)->()\n", ef);
*obj = (IEnumFORMATETC *)ef;
return S_OK;
}
/***********************************************************************
* OLEClipbrd_GlobalDupMem( HGLOBAL )
* Helper method to duplicate an HGLOBAL chunk of memory
*/
static HGLOBAL OLEClipbrd_GlobalDupMem( HGLOBAL hGlobalSrc )
{
HGLOBAL hGlobalDest;
PVOID pGlobalSrc, pGlobalDest;
DWORD cBytes;
if ( !hGlobalSrc )
return 0;
cBytes = GlobalSize(hGlobalSrc);
if ( 0 == cBytes )
return 0;
hGlobalDest = GlobalAlloc( GMEM_DDESHARE|GMEM_MOVEABLE,
cBytes );
if ( !hGlobalDest )
return 0;
pGlobalSrc = GlobalLock(hGlobalSrc);
pGlobalDest = GlobalLock(hGlobalDest);
if ( !pGlobalSrc || !pGlobalDest )
{
GlobalFree(hGlobalDest);
return 0;
}
memcpy(pGlobalDest, pGlobalSrc, cBytes);
GlobalUnlock(hGlobalSrc);
GlobalUnlock(hGlobalDest);
return hGlobalDest;
}
#define MAX_CLIPFORMAT_NAME 80
/***********************************************************************
* OLEClipbrd_RenderFormat(LPFORMATETC)
* Render the clipboard data. Note that this call will delegate to the
* source data object.
* Note: This function assumes it is passed an HGLOBAL format to render.
*/
static HRESULT OLEClipbrd_RenderFormat(IDataObject *pIDataObject, LPFORMATETC pFormatetc)
{
STGMEDIUM std;
HGLOBAL hDup;
HRESULT hr = S_OK;
char szFmtName[MAX_CLIPFORMAT_NAME];
ILockBytes *ptrILockBytes = 0;
HGLOBAL hStorage = 0;
if (!GetClipboardFormatNameA(pFormatetc->cfFormat, szFmtName, MAX_CLIPFORMAT_NAME))
szFmtName[0] = '\0';
/* If embed source */
if (!strcmp(szFmtName, CF_EMBEDSOURCE))
{
memset(&std, 0, sizeof(STGMEDIUM));
std.tymed = pFormatetc->tymed = TYMED_ISTORAGE;
hStorage = GlobalAlloc(GMEM_SHARE|GMEM_MOVEABLE, 0);
if (hStorage == NULL)
HANDLE_ERROR( E_OUTOFMEMORY );
hr = CreateILockBytesOnHGlobal(hStorage, FALSE, &ptrILockBytes);
hr = StgCreateDocfileOnILockBytes(ptrILockBytes, STGM_SHARE_EXCLUSIVE|STGM_READWRITE, 0, &std.u.pstg);
if (FAILED(hr = IDataObject_GetDataHere(theOleClipboard->pIDataObjectSrc, pFormatetc, &std)))
{
WARN("() : IDataObject_GetDataHere failed to render clipboard data! (%x)\n", hr);
GlobalFree(hStorage);
return hr;
}
if (1) /* check whether the presentation data is already -not- present */
{
FORMATETC fmt2;
STGMEDIUM std2;
METAFILEPICT *mfp = 0;
fmt2.cfFormat = CF_METAFILEPICT;
fmt2.ptd = 0;
fmt2.dwAspect = DVASPECT_CONTENT;
fmt2.lindex = -1;
fmt2.tymed = TYMED_MFPICT;
memset(&std2, 0, sizeof(STGMEDIUM));
std2.tymed = TYMED_MFPICT;
/* Get the metafile picture out of it */
if (SUCCEEDED(hr = IDataObject_GetData(theOleClipboard->pIDataObjectSrc, &fmt2, &std2)))
{
mfp = GlobalLock(std2.u.hGlobal);
}
if (mfp)
{
OLECHAR name[]={ 2, 'O', 'l', 'e', 'P', 'r', 'e', 's', '0', '0', '0', 0};
IStream *pStream = 0;
void *mfBits;
PresentationDataHeader pdh;
INT nSize;
CLSID clsID;
LPOLESTR strProgID;
CHAR strOleTypeName[51];
BYTE OlePresStreamHeader [] =
{
0xFF, 0xFF, 0xFF, 0xFF, 0x03, 0x00, 0x00, 0x00,
0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0xFF, 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00
};
nSize = GetMetaFileBitsEx(mfp->hMF, 0, NULL);
memset(&pdh, 0, sizeof(PresentationDataHeader));
memcpy(&pdh, OlePresStreamHeader, sizeof(OlePresStreamHeader));
pdh.dwObjectExtentX = mfp->xExt;
pdh.dwObjectExtentY = mfp->yExt;
pdh.dwSize = nSize;
hr = IStorage_CreateStream(std.u.pstg, name, STGM_CREATE|STGM_SHARE_EXCLUSIVE|STGM_READWRITE, 0, 0, &pStream);
hr = IStream_Write(pStream, &pdh, sizeof(PresentationDataHeader), NULL);
mfBits = HeapAlloc(GetProcessHeap(), 0, nSize);
nSize = GetMetaFileBitsEx(mfp->hMF, nSize, mfBits);
hr = IStream_Write(pStream, mfBits, nSize, NULL);
IStream_Release(pStream);
HeapFree(GetProcessHeap(), 0, mfBits);
GlobalUnlock(std2.u.hGlobal);
ReadClassStg(std.u.pstg, &clsID);
ProgIDFromCLSID(&clsID, &strProgID);
WideCharToMultiByte( CP_ACP, 0, strProgID, -1, strOleTypeName, sizeof(strOleTypeName), NULL, NULL );
OLECONVERT_CreateOleStream(std.u.pstg);
OLECONVERT_CreateCompObjStream(std.u.pstg, strOleTypeName);
}
}
}
else
{
if (FAILED(hr = IDataObject_GetData(pIDataObject, pFormatetc, &std)))
{
WARN("() : IDataObject_GetData failed to render clipboard data! (%x)\n", hr);
GlobalFree(hStorage);
return hr;
}
/* To put a copy back on the clipboard */
hStorage = std.u.hGlobal;
}
/*
* Put a copy of the rendered data back on the clipboard
*/
if ( !(hDup = OLEClipbrd_GlobalDupMem(hStorage)) )
HANDLE_ERROR( E_OUTOFMEMORY );
if ( !SetClipboardData( pFormatetc->cfFormat, hDup ) )
{
GlobalFree(hDup);
WARN("() : Failed to set rendered clipboard data into clipboard!\n");
}
CLEANUP:
ReleaseStgMedium(&std);
return hr;
}
/***********************************************************************
* OLEClipbrd_WndProc(HWND, unsigned, WORD, LONG)
* Processes messages sent to the OLE clipboard window.
* Note that we will intercept messages in our WndProc only when data
* has been placed in the clipboard via OleSetClipboard().
* i.e. Only when OLE owns the windows clipboard.
*/
static LRESULT CALLBACK OLEClipbrd_WndProc
(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
{
switch (message)
{
/*
* WM_RENDERFORMAT
* We receive this message to allow us to handle delayed rendering of
* a specific clipboard format when an application requests data in
* that format by calling GetClipboardData.
* (Recall that in OleSetClipboard, we used SetClipboardData to
* make all HGLOBAL formats supported by the source IDataObject
* available using delayed rendering)
* On receiving this message we must actually render the data in the
* specified format and place it on the clipboard by calling the
* SetClipboardData function.
*/
case WM_RENDERFORMAT:
{
FORMATETC rgelt;
ZeroMemory( &rgelt, sizeof(FORMATETC));
/*
* Initialize FORMATETC to a Windows clipboard friendly format
*/
rgelt.cfFormat = (UINT) wParam;
rgelt.dwAspect = DVASPECT_CONTENT;
rgelt.lindex = -1;
rgelt.tymed = TYMED_HGLOBAL;
TRACE("(): WM_RENDERFORMAT(cfFormat=%d)\n", rgelt.cfFormat);
/*
* Render the clipboard data.
* (We must have a source data object or we wouldn't be in this WndProc)
*/
OLEClipbrd_RenderFormat( (IDataObject*)&(theOleClipboard->lpvtbl), &rgelt );
break;
}
/*
* WM_RENDERALLFORMATS
* Sent before the clipboard owner window is destroyed.
* We should receive this message only when OleUninitialize is called
* while we have an IDataObject in the clipboard.
* For the content of the clipboard to remain available to other
* applications, we must render data in all the formats the source IDataObject
* is capable of generating, and place the data on the clipboard by calling
* SetClipboardData.
*/
case WM_RENDERALLFORMATS:
{
IEnumFORMATETC* penumFormatetc = NULL;
FORMATETC rgelt;
TRACE("(): WM_RENDERALLFORMATS\n");
/*
* Render all HGLOBAL formats supported by the source into
* the windows clipboard.
*/
if ( FAILED( IDataObject_EnumFormatEtc( (IDataObject*)&(theOleClipboard->lpvtbl),
DATADIR_GET, &penumFormatetc) ) )
{
WARN("(): WM_RENDERALLFORMATS failed to retrieve EnumFormatEtc!\n");
return 0;
}
while ( S_OK == IEnumFORMATETC_Next(penumFormatetc, 1, &rgelt, NULL) )
{
if ( rgelt.tymed == TYMED_HGLOBAL )
{
/*
* Render the clipboard data.
*/
if ( FAILED(OLEClipbrd_RenderFormat( (IDataObject*)&(theOleClipboard->lpvtbl), &rgelt )) )
continue;
TRACE("(): WM_RENDERALLFORMATS(cfFormat=%d)\n", rgelt.cfFormat);
}
}
IEnumFORMATETC_Release(penumFormatetc);
break;
}
/*
* WM_DESTROYCLIPBOARD
* This is sent by EmptyClipboard before the clipboard is emptied.
* We should release any IDataObject we are holding onto when we receive
* this message, since it indicates that the OLE clipboard should be empty
* from this point on.
*/
case WM_DESTROYCLIPBOARD:
{
TRACE("(): WM_DESTROYCLIPBOARD\n");
/*
* Release the data object we are holding on to
*/
if ( theOleClipboard->pIDataObjectSrc )
{
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
}
break;
}
/*
case WM_ASKCBFORMATNAME:
case WM_CHANGECBCHAIN:
case WM_DRAWCLIPBOARD:
case WM_SIZECLIPBOARD:
case WM_HSCROLLCLIPBOARD:
case WM_VSCROLLCLIPBOARD:
case WM_PAINTCLIPBOARD:
*/
default:
return DefWindowProcA(hWnd, message, wParam, lParam);
}
return 0;
}
/*---------------------------------------------------------------------*
* Implementation of the internal IDataObject interface exposed by
* the OLE clipboard.
*---------------------------------------------------------------------*/
/************************************************************************
* OLEClipbrd_IDataObject_QueryInterface (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_QueryInterface(
IDataObject* iface,
REFIID riid,
void** ppvObject)
{
ole_clipbrd *This = impl_from_IDataObject(iface);
TRACE("(%p)->(IID:%s, %p)\n", This, debugstr_guid(riid), ppvObject);
if ( (This==0) || (ppvObject==0) )
return E_INVALIDARG;
*ppvObject = 0;
if (IsEqualIID(&IID_IUnknown, riid) ||
IsEqualIID(&IID_IDataObject, riid))
{
*ppvObject = iface;
}
else
{
WARN( "() : asking for unsupported interface %s\n", debugstr_guid(riid));
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppvObject);
return S_OK;
}
/************************************************************************
* OLEClipbrd_IDataObject_AddRef (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static ULONG WINAPI OLEClipbrd_IDataObject_AddRef(
IDataObject* iface)
{
ole_clipbrd *This = impl_from_IDataObject(iface);
TRACE("(%p)->(count=%u)\n",This, This->ref);
return InterlockedIncrement(&This->ref);
}
/***********************************************************************
* OLEClipbrd_DestroyWindow(HWND)
* Destroy the clipboard window and unregister its class
*/
static void OLEClipbrd_DestroyWindow(HWND hwnd)
{
DestroyWindow(hwnd);
UnregisterClassA( OLEClipbrd_WNDCLASS, 0 );
}
static void OLEClipbrd_Destroy(ole_clipbrd* This)
{
TRACE("()\n");
if (!This) return;
theOleClipboard = NULL;
if ( This->hWndClipboard )
OLEClipbrd_DestroyWindow(This->hWndClipboard);
HeapFree(GetProcessHeap(), 0, This);
}
/************************************************************************
* OLEClipbrd_IDataObject_Release (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static ULONG WINAPI OLEClipbrd_IDataObject_Release(
IDataObject* iface)
{
ole_clipbrd *This = impl_from_IDataObject(iface);
ULONG ref;
TRACE("(%p)->(count=%u)\n",This, This->ref);
ref = InterlockedDecrement(&This->ref);
if (ref == 0)
{
OLEClipbrd_Destroy(This);
}
return ref;
}
/************************************************************************
* OLEClipbrd_IDataObject_GetData (IDataObject)
*
* The OLE Clipboard's implementation of this method delegates to
* a data source if there is one or wraps around the windows clipboard
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_GetData(
IDataObject* iface,
LPFORMATETC pformatetcIn,
STGMEDIUM* pmedium)
{
HANDLE hData = 0;
LPVOID src;
ole_clipbrd *This = impl_from_IDataObject(iface);
TRACE("(%p,%p,%p)\n", iface, pformatetcIn, pmedium);
if ( !pformatetcIn || !pmedium )
return E_INVALIDARG;
/*
* If we have a data source placed on the clipboard (via OleSetClipboard)
* simply delegate to the source object's QueryGetData
* NOTE: This code assumes that the IDataObject is in the same address space!
* We will need to add marshalling support when Wine handles multiple processes.
*/
if ( This->pIDataObjectSrc )
{
return IDataObject_GetData(This->pIDataObjectSrc, pformatetcIn, pmedium);
}
if ( pformatetcIn->lindex != -1 )
return DV_E_FORMATETC;
if ( (pformatetcIn->tymed & TYMED_HGLOBAL) != TYMED_HGLOBAL )
return DV_E_TYMED;
/*
if ( pformatetcIn->dwAspect != DVASPECT_CONTENT )
return DV_E_DVASPECT;
*/
/*
* Otherwise, get the data from the windows clipboard using GetClipboardData
*/
if ( !OpenClipboard(theOleClipboard->hWndClipboard)) return CLIPBRD_E_CANT_OPEN;
hData = GetClipboardData(pformatetcIn->cfFormat);
/* Must make a copy of global handle returned by GetClipboardData; it
* is not valid after we call CloseClipboard
* Application is responsible for freeing the memory (Forte Agent does this)
*/
src = GlobalLock(hData);
if(src) {
LPVOID dest;
ULONG size;
HANDLE hDest;
size = GlobalSize(hData);
hDest = GlobalAlloc(GHND, size);
dest = GlobalLock(hDest);
memcpy(dest, src, size);
GlobalUnlock(hDest);
GlobalUnlock(hData);
hData = hDest;
}
/*
* Return the clipboard data in the storage medium structure
*/
pmedium->tymed = (hData == 0) ? TYMED_NULL : TYMED_HGLOBAL;
pmedium->u.hGlobal = hData;
pmedium->pUnkForRelease = NULL;
if ( !CloseClipboard() ) return CLIPBRD_E_CANT_CLOSE;
return (hData == 0) ? DV_E_FORMATETC : S_OK;
}
static HRESULT WINAPI OLEClipbrd_IDataObject_GetDataHere(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium)
{
FIXME(": Stub\n");
return E_NOTIMPL;
}
/************************************************************************
* OLEClipbrd_IDataObject_QueryGetData (IDataObject)
*
* The OLE Clipboard's implementation of this method delegates to
* a data source if there is one or wraps around the windows clipboard
* function IsClipboardFormatAvailable() otherwise.
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_QueryGetData(
IDataObject* iface,
LPFORMATETC pformatetc)
{
TRACE("(%p, %p)\n", iface, pformatetc);
if (!pformatetc)
return E_INVALIDARG;
if ( pformatetc->dwAspect != DVASPECT_CONTENT )
return DV_E_FORMATETC;
if ( pformatetc->lindex != -1 )
return DV_E_FORMATETC;
/*
* Delegate to the Windows clipboard function IsClipboardFormatAvailable
*/
return (IsClipboardFormatAvailable(pformatetc->cfFormat)) ? S_OK : DV_E_CLIPFORMAT;
}
/************************************************************************
* OLEClipbrd_IDataObject_GetCanonicalFormatEtc (IDataObject)
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_GetCanonicalFormatEtc(
IDataObject* iface,
LPFORMATETC pformatectIn,
LPFORMATETC pformatetcOut)
{
TRACE("(%p, %p, %p)\n", iface, pformatectIn, pformatetcOut);
if ( !pformatectIn || !pformatetcOut )
return E_INVALIDARG;
*pformatetcOut = *pformatectIn;
return DATA_S_SAMEFORMATETC;
}
/************************************************************************
* OLEClipbrd_IDataObject_SetData (IDataObject)
*
* The OLE Clipboard's does not implement this method
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_SetData(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium,
BOOL fRelease)
{
TRACE("\n");
return E_NOTIMPL;
}
/************************************************************************
* OLEClipbrd_IDataObject_EnumFormatEtc (IDataObject)
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_EnumFormatEtc(
IDataObject* iface,
DWORD dwDirection,
IEnumFORMATETC** enum_fmt)
{
HRESULT hr = S_OK;
ole_clipbrd *This = impl_from_IDataObject(iface);
HGLOBAL handle;
ole_priv_data *data = NULL;
TRACE("(%p, %x, %p)\n", iface, dwDirection, enum_fmt);
*enum_fmt = NULL;
if ( dwDirection != DATADIR_GET ) return E_NOTIMPL;
if ( !OpenClipboard(This->hWndClipboard) ) return CLIPBRD_E_CANT_OPEN;
handle = GetClipboardData( ole_priv_data_clipboard_format );
if(handle)
{
ole_priv_data *src = GlobalLock(handle);
if(src)
{
/* FIXME: sanity check on size */
data = HeapAlloc(GetProcessHeap(), 0, src->size);
if(!data)
{
GlobalUnlock(handle);
hr = E_OUTOFMEMORY;
goto end;
}
memcpy(data, src, src->size);
GlobalUnlock(handle);
}
}
if(!data) hr = create_empty_priv_data(&data);
if(FAILED(hr)) goto end;
hr = enum_fmtetc_construct( data, 0, enum_fmt );
end:
if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE;
return hr;
}
/************************************************************************
* OLEClipbrd_IDataObject_DAdvise (IDataObject)
*
* The OLE Clipboard's does not implement this method
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_DAdvise(
IDataObject* iface,
FORMATETC* pformatetc,
DWORD advf,
IAdviseSink* pAdvSink,
DWORD* pdwConnection)
{
TRACE("\n");
return E_NOTIMPL;
}
/************************************************************************
* OLEClipbrd_IDataObject_DUnadvise (IDataObject)
*
* The OLE Clipboard's does not implement this method
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_DUnadvise(
IDataObject* iface,
DWORD dwConnection)
{
TRACE("\n");
return E_NOTIMPL;
}
/************************************************************************
* OLEClipbrd_IDataObject_EnumDAdvise (IDataObject)
*
* The OLE Clipboard does not implement this method
*
* See Windows documentation for more details on IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_EnumDAdvise(
IDataObject* iface,
IEnumSTATDATA** ppenumAdvise)
{
TRACE("\n");
return E_NOTIMPL;
}
static const IDataObjectVtbl OLEClipbrd_IDataObject_VTable =
{
OLEClipbrd_IDataObject_QueryInterface,
OLEClipbrd_IDataObject_AddRef,
OLEClipbrd_IDataObject_Release,
OLEClipbrd_IDataObject_GetData,
OLEClipbrd_IDataObject_GetDataHere,
OLEClipbrd_IDataObject_QueryGetData,
OLEClipbrd_IDataObject_GetCanonicalFormatEtc,
OLEClipbrd_IDataObject_SetData,
OLEClipbrd_IDataObject_EnumFormatEtc,
OLEClipbrd_IDataObject_DAdvise,
OLEClipbrd_IDataObject_DUnadvise,
OLEClipbrd_IDataObject_EnumDAdvise
};
/*---------------------------------------------------------------------*
* Internal implementation methods for the OLE clipboard
*---------------------------------------------------------------------*/
/*********************************************************
* Construct the OLEClipbrd class.
*/
static ole_clipbrd* OLEClipbrd_Construct(void)
{
ole_clipbrd* This;
This = HeapAlloc( GetProcessHeap(), 0, sizeof(*This) );
if (!This) return NULL;
This->lpvtbl = &OLEClipbrd_IDataObject_VTable;
This->ref = 1;
This->hWndClipboard = NULL;
This->pIDataObjectSrc = NULL;
theOleClipboard = This;
return This;
}
static void register_clipboard_formats(void)
{
static const WCHAR DataObjectW[] = { 'D','a','t','a','O','b','j','e','c','t',0 };
static const WCHAR OlePrivateDataW[] = { 'O','l','e',' ','P','r','i','v','a','t','e',' ','D','a','t','a',0 };
if(!dataobject_clipboard_format)
dataobject_clipboard_format = RegisterClipboardFormatW(DataObjectW);
if(!ole_priv_data_clipboard_format)
ole_priv_data_clipboard_format = RegisterClipboardFormatW(OlePrivateDataW);
}
/***********************************************************************
* OLEClipbrd_Initialize()
* Initializes the OLE clipboard.
*/
void OLEClipbrd_Initialize(void)
{
register_clipboard_formats();
if ( !theOleClipboard )
{
TRACE("()\n");
theOleClipboard = OLEClipbrd_Construct();
}
}
/***********************************************************************
* OLEClipbrd_UnInitialize()
* Un-Initializes the OLE clipboard
*/
void OLEClipbrd_UnInitialize(void)
{
TRACE("()\n");
/*
* Destroy the clipboard if no one holds a reference to us.
* Note that the clipboard was created with a reference count of 1.
*/
if ( theOleClipboard && (theOleClipboard->ref <= 1) )
{
OLEClipbrd_Destroy( theOleClipboard );
}
else
{
WARN( "() : OLEClipbrd_UnInitialize called while client holds an IDataObject reference!\n");
}
}
/***********************************************************************
* OLEClipbrd_CreateWindow()
* Create the clipboard window
*/
static HWND OLEClipbrd_CreateWindow(void)
{
HWND hwnd = 0;
WNDCLASSEXA wcex;
/*
* Register the clipboard window class if necessary
*/
ZeroMemory( &wcex, sizeof(WNDCLASSEXA));
wcex.cbSize = sizeof(WNDCLASSEXA);
/* Windows creates this class with a style mask of 0
* We don't bother doing this since the FindClassByAtom code
* would have to be changed to deal with this idiosyncrasy. */
wcex.style = CS_GLOBALCLASS;
wcex.lpfnWndProc = OLEClipbrd_WndProc;
wcex.hInstance = 0;
wcex.lpszClassName = OLEClipbrd_WNDCLASS;
RegisterClassExA(&wcex);
/*
* Create a hidden window to receive OLE clipboard messages
*/
/*
* If we need to store state info we can store it here.
* For now we don't need this functionality.
* ClipboardWindowInfo clipboardInfo;
* ZeroMemory( &trackerInfo, sizeof(ClipboardWindowInfo));
*/
hwnd = CreateWindowA(OLEClipbrd_WNDCLASS,
"ClipboardWindow",
WS_POPUP | WS_CLIPSIBLINGS | WS_OVERLAPPED,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
0,
0,
0,
0 /*(LPVOID)&clipboardInfo */);
return hwnd;
}
static inline BOOL is_format_in_list(ole_priv_data_entry *entries, DWORD num, UINT cf)
{
DWORD i;
for(i = 0; i < num; i++)
if(entries[i].fmtetc.cfFormat == cf)
return TRUE;
return FALSE;
}
/*********************************************************************
* set_clipboard_formats
*
* Enumerate all HGLOBAL formats supported by the source and make
* those formats available using delayed rendering using SetClipboardData.
*
* TODO: We need to additionally handle TYMED_IStorage and
* TYMED_IStream data by copying into global memory.
*/
static HRESULT set_clipboard_formats(IDataObject *data)
{
HRESULT hr;
FORMATETC fmt;
IEnumFORMATETC *enum_fmt;
HGLOBAL priv_data_handle;
DWORD target_offset;
ole_priv_data *priv_data;
DWORD count = 0, needed = sizeof(*priv_data), idx;
hr = IDataObject_EnumFormatEtc(data, DATADIR_GET, &enum_fmt);
if(FAILED(hr)) return hr;
while(IEnumFORMATETC_Next(enum_fmt, 1, &fmt, NULL) == S_OK)
{
count++;
needed += sizeof(priv_data->entries[0]);
if(fmt.ptd)
{
needed += fmt.ptd->tdSize;
CoTaskMemFree(fmt.ptd);
}
}
/* Windows pads the list with two empty ole_priv_data_entries, one
* after the entries array and one after the target device data.
* Allocating with zero init to zero these pads. */
needed += sizeof(priv_data->entries[0]); /* initialisation of needed includes one of these. */
priv_data_handle = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE | GMEM_ZEROINIT, needed);
priv_data = GlobalLock(priv_data_handle);
priv_data->unk1 = 0;
priv_data->size = needed;
priv_data->unk2 = 1;
priv_data->count = count;
priv_data->unk3[0] = 0;
priv_data->unk3[1] = 0;
IEnumFORMATETC_Reset(enum_fmt);
idx = 0;
target_offset = FIELD_OFFSET(ole_priv_data, entries[count + 1]); /* count entries + one pad. */
while(IEnumFORMATETC_Next(enum_fmt, 1, &fmt, NULL) == S_OK)
{
if (fmt.tymed == TYMED_HGLOBAL)
{
char fmt_name[80];
TRACE("(cfFormat=%d:%s)\n", fmt.cfFormat,
GetClipboardFormatNameA(fmt.cfFormat, fmt_name, sizeof(fmt_name)-1) ? fmt_name : "");
SetClipboardData(fmt.cfFormat, NULL);
}
priv_data->entries[idx].fmtetc = fmt;
if(fmt.ptd)
{
memcpy((char*)priv_data + target_offset, fmt.ptd, fmt.ptd->tdSize);
priv_data->entries[idx].fmtetc.ptd = (DVTARGETDEVICE*)target_offset;
target_offset += fmt.ptd->tdSize;
CoTaskMemFree(fmt.ptd);
}
priv_data->entries[idx].first_use = !is_format_in_list(priv_data->entries, idx, fmt.cfFormat);
priv_data->entries[idx].unk[0] = 0;
priv_data->entries[idx].unk[1] = 0;
idx++;
}
IEnumFORMATETC_Release(enum_fmt);
GlobalUnlock(priv_data_handle);
SetClipboardData(ole_priv_data_clipboard_format, priv_data_handle);
return S_OK;
}
/*********************************************************************
* set_dataobject_format
*
* Windows creates a 'DataObject' clipboard format that contains the
* clipboard window's HWND or NULL if the Ole clipboard has been flushed.
*/
static HRESULT set_dataobject_format(HWND hwnd)
{
HGLOBAL h = GlobalAlloc(GMEM_DDESHARE | GMEM_MOVEABLE, sizeof(hwnd));
HWND *data;
if(!h) return E_OUTOFMEMORY;
data = GlobalLock(h);
*data = hwnd;
GlobalUnlock(h);
if(!SetClipboardData(dataobject_clipboard_format, h))
{
GlobalFree(h);
return CLIPBRD_E_CANT_SET;
}
return S_OK;
}
/*---------------------------------------------------------------------*
* Win32 OLE clipboard API
*---------------------------------------------------------------------*/
/***********************************************************************
* OleSetClipboard [OLE32.@]
* Places a pointer to the specified data object onto the clipboard,
* making the data object accessible to the OleGetClipboard function.
*
* RETURNS
*
* S_OK IDataObject pointer placed on the clipboard
* CLIPBRD_E_CANT_OPEN OpenClipboard failed
* CLIPBRD_E_CANT_EMPTY EmptyClipboard failed
* CLIPBRD_E_CANT_CLOSE CloseClipboard failed
* CLIPBRD_E_CANT_SET SetClipboard failed
*/
HRESULT WINAPI OleSetClipboard(IDataObject* pDataObj)
{
HRESULT hr = S_OK;
struct oletls *info = COM_CurrentInfo();
TRACE("(%p)\n", pDataObj);
if(!info)
WARN("Could not allocate tls\n");
else
if(!info->ole_inits)
return CO_E_NOTINITIALIZED;
OLEClipbrd_Initialize();
/*
* If the Ole clipboard window hasn't been created yet, create it now.
*/
if ( !theOleClipboard->hWndClipboard )
theOleClipboard->hWndClipboard = OLEClipbrd_CreateWindow();
if ( !theOleClipboard->hWndClipboard ) return E_FAIL;
if ( !OpenClipboard(theOleClipboard->hWndClipboard) ) return CLIPBRD_E_CANT_OPEN;
/*
* Empty the current clipboard and make our window the clipboard owner
* NOTE: This will trigger a WM_DESTROYCLIPBOARD message
*/
if ( !EmptyClipboard() )
{
hr = CLIPBRD_E_CANT_EMPTY;
goto end;
}
/*
* If we are already holding on to an IDataObject first release that.
*/
if ( theOleClipboard->pIDataObjectSrc )
{
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
}
/* A NULL value indicates that the clipboard should be emptied. */
theOleClipboard->pIDataObjectSrc = pDataObj;
if ( pDataObj )
{
IDataObject_AddRef(theOleClipboard->pIDataObjectSrc);
hr = set_clipboard_formats(pDataObj);
if(FAILED(hr)) goto end;
}
hr = set_dataobject_format(theOleClipboard->hWndClipboard);
end:
if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE;
if ( FAILED(hr) )
{
if (theOleClipboard->pIDataObjectSrc)
{
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
}
}
return hr;
}
/***********************************************************************
* OleGetClipboard [OLE32.@]
* Returns a pointer to our internal IDataObject which represents the conceptual
* state of the Windows clipboard. If the current clipboard already contains
* an IDataObject, our internal IDataObject will delegate to this object.
*/
HRESULT WINAPI OleGetClipboard(IDataObject** ppDataObj)
{
HRESULT hr = S_OK;
TRACE("()\n");
/*
* Make sure we have a clipboard object
*/
OLEClipbrd_Initialize();
if (!theOleClipboard)
return E_OUTOFMEMORY;
/* Return a reference counted IDataObject */
hr = IDataObject_QueryInterface( (IDataObject*)&(theOleClipboard->lpvtbl),
&IID_IDataObject, (void**)ppDataObj);
return hr;
}
/******************************************************************************
* OleFlushClipboard [OLE32.@]
* Renders the data from the source IDataObject into the windows clipboard
*
* TODO: OleFlushClipboard needs to additionally handle TYMED_IStorage media
* by copying the storage into global memory. Subsequently the default
* data object exposed through OleGetClipboard must convert this TYMED_HGLOBAL
* back to TYMED_IStorage.
*/
HRESULT WINAPI OleFlushClipboard(void)
{
IEnumFORMATETC* penumFormatetc = NULL;
FORMATETC rgelt;
HRESULT hr = S_OK;
TRACE("()\n");
OLEClipbrd_Initialize();
/*
* Already flushed or no source DataObject? Nothing to do.
*/
if (!theOleClipboard->pIDataObjectSrc)
return S_OK;
if (!OpenClipboard(theOleClipboard->hWndClipboard))
return CLIPBRD_E_CANT_OPEN;
/*
* Render all HGLOBAL formats supported by the source into
* the windows clipboard.
*/
if ( FAILED( hr = IDataObject_EnumFormatEtc( theOleClipboard->pIDataObjectSrc,
DATADIR_GET,
&penumFormatetc) ))
goto end;
while ( S_OK == IEnumFORMATETC_Next(penumFormatetc, 1, &rgelt, NULL) )
{
if ( rgelt.tymed == TYMED_HGLOBAL )
{
CHAR szFmtName[80];
TRACE("(cfFormat=%d:%s)\n", rgelt.cfFormat,
GetClipboardFormatNameA(rgelt.cfFormat, szFmtName, sizeof(szFmtName)-1)
? szFmtName : "");
if ( FAILED(OLEClipbrd_RenderFormat( theOleClipboard->pIDataObjectSrc, &rgelt )) )
continue;
}
}
IEnumFORMATETC_Release(penumFormatetc);
hr = set_dataobject_format(NULL);
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
end:
if ( !CloseClipboard() ) hr = CLIPBRD_E_CANT_CLOSE;
return hr;
}
/***********************************************************************
* OleIsCurrentClipboard [OLE32.@]
*/
HRESULT WINAPI OleIsCurrentClipboard(IDataObject *pDataObject)
{
TRACE("()\n");
/*
* Make sure we have a clipboard object
*/
OLEClipbrd_Initialize();
if (!theOleClipboard)
return E_OUTOFMEMORY;
if (pDataObject == NULL)
return S_FALSE;
return (pDataObject == theOleClipboard->pIDataObjectSrc) ? S_OK : S_FALSE;
}
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