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/*
* OLE 2 clipboard support
*
* Copyright 1999 Noel Borthwick <noel@macadamian.com>
* Copyright 2000 Abey George <abey@macadamian.com>
*
* 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 "windef.h"
#include "wingdi.h"
#include "winuser.h"
#include "winbase.h"
#include "winerror.h"
#include "wine/winestring.h"
#include "ole2.h"
#include "debugtools.h"
#include "olestd.h"
#include "storage32.h"
#define HANDLE_ERROR(err) { hr = err; TRACE("(HRESULT=%lx)\n", (HRESULT)err); goto CLEANUP; }
/* For CoGetMalloc (MEMCTX_TASK is currently ignored) */
#ifndef MEMCTX_TASK
#define MEMCTX_TASK -1
#endif
DEFAULT_DEBUG_CHANNEL(ole)
/****************************************************************************
* OLEClipbrd
* DO NOT add any members before the VTables declaration!
*/
struct OLEClipbrd
{
/*
* List all interface VTables here
*/
ICOM_VTABLE(IDataObject)* lpvtbl1; /* IDataObject VTable */
/*
* The hidden OLE clipboard window. This window is used as the bridge between the
* the OLE and windows clipboard API. (Windows creates one such window per process)
*/
HWND hWndClipboard;
/*
* Pointer to the source data object (via OleSetClipboard)
*/
IDataObject* pIDataObjectSrc;
/*
* The registered DataObject clipboard format
*/
UINT cfDataObj;
/*
* The handle to our ourself
*/
UINT hSelf;
/*
* Reference count of this object
*/
ULONG ref;
};
typedef struct OLEClipbrd OLEClipbrd;
/****************************************************************************
* IEnumFORMATETC implementation
* DO NOT add any members before the VTables declaration!
*/
typedef struct
{
/* IEnumFORMATETC VTable */
ICOM_VFIELD(IEnumFORMATETC);
/* IEnumFORMATETC fields */
UINT posFmt; /* current enumerator position */
UINT countFmt; /* number of EnumFORMATETC's in array */
LPFORMATETC pFmt; /* array of EnumFORMATETC's */
/*
* Reference count of this object
*/
DWORD ref;
/*
* IUnknown implementation of the parent data object.
*/
IUnknown* pUnkDataObj;
} IEnumFORMATETCImpl;
typedef struct PresentationDataHeader
{
BYTE unknown1[28];
DWORD dwObjectExtentX;
DWORD dwObjectExtentY;
DWORD dwSize;
} PresentationDataHeader;
/*
* The one and only OLEClipbrd object which is created by OLEClipbrd_Initialize()
*/
static HGLOBAL hTheOleClipboard = 0;
static OLEClipbrd* theOleClipboard = NULL;
/*
* Prototypes for the methods of the OLEClipboard class.
*/
extern void OLEClipbrd_Initialize();
extern void OLEClipbrd_UnInitialize();
static OLEClipbrd* OLEClipbrd_Construct();
static void OLEClipbrd_Destroy(OLEClipbrd* ptrToDestroy);
static HWND OLEClipbrd_CreateWindow();
static void OLEClipbrd_DestroyWindow(HWND hwnd);
LRESULT CALLBACK OLEClipbrd_WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
static HRESULT OLEClipbrd_RenderFormat( IDataObject *pIDataObject, LPFORMATETC pFormatetc );
static HGLOBAL OLEClipbrd_GlobalDupMem( HGLOBAL hGlobalSrc );
/*
* Prototypes for the methods of the OLEClipboard class
* that implement IDataObject methods.
*/
static HRESULT WINAPI OLEClipbrd_IDataObject_QueryInterface(
IDataObject* iface,
REFIID riid,
void** ppvObject);
static ULONG WINAPI OLEClipbrd_IDataObject_AddRef(
IDataObject* iface);
static ULONG WINAPI OLEClipbrd_IDataObject_Release(
IDataObject* iface);
static HRESULT WINAPI OLEClipbrd_IDataObject_GetData(
IDataObject* iface,
LPFORMATETC pformatetcIn,
STGMEDIUM* pmedium);
static HRESULT WINAPI OLEClipbrd_IDataObject_GetDataHere(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium);
static HRESULT WINAPI OLEClipbrd_IDataObject_QueryGetData(
IDataObject* iface,
LPFORMATETC pformatetc);
static HRESULT WINAPI OLEClipbrd_IDataObject_GetCanonicalFormatEtc(
IDataObject* iface,
LPFORMATETC pformatectIn,
LPFORMATETC pformatetcOut);
static HRESULT WINAPI OLEClipbrd_IDataObject_SetData(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium,
BOOL fRelease);
static HRESULT WINAPI OLEClipbrd_IDataObject_EnumFormatEtc(
IDataObject* iface,
DWORD dwDirection,
IEnumFORMATETC** ppenumFormatEtc);
static HRESULT WINAPI OLEClipbrd_IDataObject_DAdvise(
IDataObject* iface,
FORMATETC* pformatetc,
DWORD advf,
IAdviseSink* pAdvSink,
DWORD* pdwConnection);
static HRESULT WINAPI OLEClipbrd_IDataObject_DUnadvise(
IDataObject* iface,
DWORD dwConnection);
static HRESULT WINAPI OLEClipbrd_IDataObject_EnumDAdvise(
IDataObject* iface,
IEnumSTATDATA** ppenumAdvise);
/*
* Prototypes for the IEnumFORMATETC methods.
*/
static LPENUMFORMATETC OLEClipbrd_IEnumFORMATETC_Construct(UINT cfmt, const FORMATETC afmt[],
LPUNKNOWN pUnkDataObj);
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_QueryInterface(LPENUMFORMATETC iface, REFIID riid,
LPVOID* ppvObj);
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_AddRef(LPENUMFORMATETC iface);
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_Release(LPENUMFORMATETC iface);
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Next(LPENUMFORMATETC iface, ULONG celt,
FORMATETC* rgelt, ULONG* pceltFethed);
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Skip(LPENUMFORMATETC iface, ULONG celt);
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Reset(LPENUMFORMATETC iface);
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum);
/*
* Virtual function table for the OLEClipbrd's exposed IDataObject interface
*/
static ICOM_VTABLE(IDataObject) OLEClipbrd_IDataObject_VTable =
{
ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
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
};
/*
* Virtual function table for IEnumFORMATETC interface
*/
static struct ICOM_VTABLE(IEnumFORMATETC) efvt =
{
ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
OLEClipbrd_IEnumFORMATETC_QueryInterface,
OLEClipbrd_IEnumFORMATETC_AddRef,
OLEClipbrd_IEnumFORMATETC_Release,
OLEClipbrd_IEnumFORMATETC_Next,
OLEClipbrd_IEnumFORMATETC_Skip,
OLEClipbrd_IEnumFORMATETC_Reset,
OLEClipbrd_IEnumFORMATETC_Clone
};
/*
* Name of our registered OLE clipboard window class
*/
CHAR OLEClipbrd_WNDCLASS[] = "CLIPBRDWNDCLASS";
/*
* If we need to store state info we can store it here.
* For now we dont need this functionality.
*
typedef struct tagClipboardWindowInfo
{
} ClipboardWindowInfo;
*/
/*---------------------------------------------------------------------*
* Win32 OLE clipboard API
*---------------------------------------------------------------------*/
/***********************************************************************
* OleSetClipboard [OLE32.127]
* 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;
IEnumFORMATETC* penumFormatetc = NULL;
FORMATETC rgelt;
BOOL bClipboardOpen = FALSE;
/*
HGLOBAL hDataObject = 0;
OLEClipbrd **ppDataObject;
*/
TRACE("(%p)\n", pDataObj);
/*
* Make sure we have a clipboard object
*/
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 ) /* sanity check */
HANDLE_ERROR( E_FAIL );
/*
* Open the Windows clipboard, associating it with our hidden window
*/
if ( !(bClipboardOpen = OpenClipboard(theOleClipboard->hWndClipboard)) )
HANDLE_ERROR( 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() )
HANDLE_ERROR( CLIPBRD_E_CANT_EMPTY );
/*
* If we are already holding on to an IDataObject first release that.
*/
if ( theOleClipboard->pIDataObjectSrc )
{
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
}
/*
* AddRef the data object passed in and save its pointer.
* A NULL value indicates that the clipboard should be emptied.
*/
theOleClipboard->pIDataObjectSrc = pDataObj;
if ( pDataObj )
{
IDataObject_AddRef(theOleClipboard->pIDataObjectSrc);
}
/*
* Enumerate all HGLOBAL formats supported by the source and make
* those formats available using delayed rendering using SetClipboardData.
* Only global memory based data items may be made available to non-OLE
* applications via the standard Windows clipboard API. Data based on other
* mediums(non TYMED_HGLOBAL) can only be accessed via the Ole Clipboard API.
*
* TODO: Do we need to additionally handle TYMED_IStorage media by copying
* the storage into global memory?
*/
if ( pDataObj )
{
if ( FAILED(hr = IDataObject_EnumFormatEtc( pDataObj,
DATADIR_GET,
&penumFormatetc )))
{
HANDLE_ERROR( hr );
}
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 : "");
SetClipboardData( rgelt.cfFormat, (HANDLE)NULL);
}
}
IEnumFORMATETC_Release(penumFormatetc);
}
/*
* Windows additionally creates a new "DataObject" clipboard format
* and stores in on the clipboard. We could possibly store a pointer
* to our internal IDataObject interface on the clipboard. I'm not
* sure what the use of this is though.
* Enable the code below for this functionality.
*/
/*
theOleClipboard->cfDataObj = RegisterClipboardFormatA("DataObject");
hDataObject = GlobalAlloc( GMEM_DDESHARE|GMEM_MOVEABLE|GMEM_ZEROINIT,
sizeof(OLEClipbrd *));
if (hDataObject==0)
HANDLE_ERROR( E_OUTOFMEMORY );
ppDataObject = (OLEClipbrd**)GlobalLock(hDataObject);
*ppDataObject = theOleClipboard;
GlobalUnlock(hDataObject);
if ( !SetClipboardData( theOleClipboard->cfDataObj, hDataObject ) )
HANDLE_ERROR( CLIPBRD_E_CANT_SET );
*/
hr = S_OK;
CLEANUP:
/*
* Close Windows clipboard (It remains associated with our window)
*/
if ( bClipboardOpen && !CloseClipboard() )
hr = CLIPBRD_E_CANT_CLOSE;
/*
* Release the source IDataObject if something failed
*/
if ( FAILED(hr) )
{
if (theOleClipboard->pIDataObjectSrc)
{
IDataObject_Release(theOleClipboard->pIDataObjectSrc);
theOleClipboard->pIDataObjectSrc = NULL;
}
}
return hr;
}
/***********************************************************************
* OleGetClipboard [OLE32.105]
* 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->lpvtbl1),
&IID_IDataObject, (void**)ppDataObj);
return hr;
}
/***********************************************************************
* OleFlushClipboard [OLE2.76]
*/
HRESULT WINAPI OleFlushClipboard16(void)
{
return OleFlushClipboard();
}
/******************************************************************************
* OleFlushClipboard [OLE32.103]
* 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()
{
IEnumFORMATETC* penumFormatetc = NULL;
FORMATETC rgelt;
HRESULT hr = S_OK;
BOOL bClipboardOpen = FALSE;
IDataObject* pIDataObjectSrc = NULL;
TRACE("()\n");
/*
* Make sure we have a clipboard object
*/
OLEClipbrd_Initialize();
/*
* Already flushed or no source DataObject? Nothing to do.
*/
if (!theOleClipboard->pIDataObjectSrc)
return S_OK;
/*
* Addref and save the source data object we are holding on to temporarily,
* since it will be released when we empty the clipboard.
*/
pIDataObjectSrc = theOleClipboard->pIDataObjectSrc;
IDataObject_AddRef(pIDataObjectSrc);
/*
* Open the Windows clipboard
*/
if ( !(bClipboardOpen = OpenClipboard(theOleClipboard->hWndClipboard)) )
HANDLE_ERROR( CLIPBRD_E_CANT_OPEN );
/*
* Empty the current clipboard
*/
if ( !EmptyClipboard() )
HANDLE_ERROR( CLIPBRD_E_CANT_EMPTY );
/*
* Render all HGLOBAL formats supported by the source into
* the windows clipboard.
*/
if ( FAILED( hr = IDataObject_EnumFormatEtc( pIDataObjectSrc,
DATADIR_GET,
&penumFormatetc) ))
{
HANDLE_ERROR( hr );
}
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 : "");
/*
* Render the clipboard data
*/
if ( FAILED(OLEClipbrd_RenderFormat( pIDataObjectSrc, &rgelt )) )
continue;
}
}
IEnumFORMATETC_Release(penumFormatetc);
/*
* Release the source data object we are holding on to
*/
IDataObject_Release(pIDataObjectSrc);
CLEANUP:
/*
* Close Windows clipboard (It remains associated with our window)
*/
if ( bClipboardOpen && !CloseClipboard() )
hr = CLIPBRD_E_CANT_CLOSE;
return hr;
}
/***********************************************************************
* OleIsCurrentClipboard [OLE32.110]
*/
HRESULT WINAPI OleIsCurrentClipboard ( IDataObject *pDataObject)
{
TRACE("()\n");
/*
* Make sure we have a clipboard object
*/
OLEClipbrd_Initialize();
if (!theOleClipboard)
return E_OUTOFMEMORY;
return (pDataObject == theOleClipboard->pIDataObjectSrc) ? S_OK : S_FALSE;
}
/*---------------------------------------------------------------------*
* Internal implementation methods for the OLE clipboard
*---------------------------------------------------------------------*/
/***********************************************************************
* OLEClipbrd_Initialize()
* Initializes the OLE clipboard.
*/
void OLEClipbrd_Initialize()
{
/*
* Create the clipboard if necesary
*/
if ( !theOleClipboard )
{
TRACE("()\n");
theOleClipboard = OLEClipbrd_Construct();
}
}
/***********************************************************************
* OLEClipbrd_UnInitialize()
* Un-Initializes the OLE clipboard
*/
void OLEClipbrd_UnInitialize()
{
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");
}
}
/*********************************************************
* Construct the OLEClipbrd class.
*/
static OLEClipbrd* OLEClipbrd_Construct()
{
OLEClipbrd* newObject = NULL;
HGLOBAL hNewObject = 0;
/*
* Allocate space for the object. We use GlobalAlloc since we need
* an HGLOBAL to expose our DataObject as a registered clipboard type.
*/
hNewObject = GlobalAlloc( GMEM_DDESHARE|GMEM_MOVEABLE|GMEM_ZEROINIT,
sizeof(OLEClipbrd));
if (hNewObject==0)
return NULL;
/*
* Lock the handle for the entire lifetime of the clipboard.
*/
newObject = GlobalLock(hNewObject);
/*
* Initialize the virtual function table.
*/
newObject->lpvtbl1 = &OLEClipbrd_IDataObject_VTable;
/*
* Start with one reference count. The caller of this function
* must release the interface pointer when it is done.
*/
newObject->ref = 1;
newObject->hSelf = hNewObject;
/*
* The Ole clipboard is a singleton - save the global handle and pointer
*/
theOleClipboard = newObject;
hTheOleClipboard = hNewObject;
return theOleClipboard;
}
static void OLEClipbrd_Destroy(OLEClipbrd* ptrToDestroy)
{
TRACE("()\n");
if ( !ptrToDestroy )
return;
/*
* Destroy the Ole clipboard window
*/
if ( ptrToDestroy->hWndClipboard )
OLEClipbrd_DestroyWindow(ptrToDestroy->hWndClipboard);
/*
* Free the actual OLE Clipboard structure.
*/
TRACE("() - Destroying clipboard data object.\n");
GlobalUnlock(ptrToDestroy->hSelf);
GlobalFree(ptrToDestroy->hSelf);
/*
* The Ole clipboard is a singleton (ptrToDestroy == theOleClipboard)
*/
theOleClipboard = NULL;
hTheOleClipboard = 0;
}
/***********************************************************************
* OLEClipbrd_CreateWindow()
* Create the clipboard window
*/
static HWND OLEClipbrd_CreateWindow()
{
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 dont bother doing this since the FindClassByAtom code
* would have to be changed to deal with this idiosyncracy. */
wcex.style = CS_GLOBALCLASS;
wcex.lpfnWndProc = (WNDPROC)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 dont 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;
}
/***********************************************************************
* OLEClipbrd_DestroyWindow(HWND)
* Destroy the clipboard window and unregister its class
*/
static void OLEClipbrd_DestroyWindow(HWND hwnd)
{
/*
* Destroy clipboard window and unregister its WNDCLASS
*/
DestroyWindow(hwnd);
UnregisterClassA( OLEClipbrd_WNDCLASS, 0 );
}
/***********************************************************************
* 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.
*/
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 mesage 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->lpvtbl1), &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->lpvtbl1),
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->lpvtbl1), &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;
}
#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;
GetClipboardFormatNameA(pFormatetc->cfFormat, szFmtName, MAX_CLIPFORMAT_NAME);
/* 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);
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! (%lx)\n", hr);
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 (!FAILED(hr = IDataObject_GetData(theOleClipboard->pIDataObjectSrc, &fmt2, &std2)))
{
mfp = (METAFILEPICT *)GlobalLock(std2.u.hMetaFilePict);
}
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.hMetaFilePict);
ReadClassStg(std.u.pstg, &clsID);
ProgIDFromCLSID(&clsID, &strProgID);
lstrcpyWtoA(strOleTypeName, strProgID);
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! (%lx)\n", hr);
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_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 )
return 0;
memcpy(pGlobalDest, pGlobalSrc, cBytes);
GlobalUnlock(hGlobalSrc);
GlobalUnlock(hGlobalDest);
return hGlobalDest;
}
/*---------------------------------------------------------------------*
* 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)
{
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, iface);
TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObject);
/*
* Perform a sanity check on the parameters.
*/
if ( (This==0) || (ppvObject==0) )
return E_INVALIDARG;
/*
* Initialize the return parameter.
*/
*ppvObject = 0;
/*
* Compare the riid with the interface IDs implemented by this object.
*/
if (memcmp(&IID_IUnknown, riid, sizeof(IID_IUnknown)) == 0)
{
*ppvObject = iface;
}
else if (memcmp(&IID_IDataObject, riid, sizeof(IID_IDataObject)) == 0)
{
*ppvObject = (IDataObject*)&(This->lpvtbl1);
}
else /* We only support IUnknown and IDataObject */
{
WARN( "() : asking for unsupported interface %s\n", debugstr_guid(riid));
return E_NOINTERFACE;
}
/*
* Query Interface always increases the reference count by one when it is
* successful.
*/
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)
{
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, iface);
TRACE("(%p)->(count=%lu)\n",This, This->ref);
This->ref++;
return This->ref;
}
/************************************************************************
* OLEClipbrd_IDataObject_Release (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static ULONG WINAPI OLEClipbrd_IDataObject_Release(
IDataObject* iface)
{
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, iface);
TRACE("(%p)->(count=%lu)\n",This, This->ref);
/*
* Decrease the reference count on this object.
*/
This->ref--;
/*
* If the reference count goes down to 0, perform suicide.
*/
if (This->ref==0)
{
OLEClipbrd_Destroy(This);
}
return This->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;
BOOL bClipboardOpen = FALSE;
HRESULT hr = S_OK;
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, 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_LINDEX;
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 ( !(bClipboardOpen = OpenClipboard(theOleClipboard->hWndClipboard)) )
HANDLE_ERROR( CLIPBRD_E_CANT_OPEN );
hData = GetClipboardData(pformatetcIn->cfFormat);
/*
* Return the clipboard data in the storage medium structure
*/
pmedium->tymed = (hData == 0) ? TYMED_NULL : TYMED_HGLOBAL;
pmedium->u.hGlobal = (HGLOBAL)hData;
pmedium->pUnkForRelease = NULL;
hr = S_OK;
CLEANUP:
/*
* Close Windows clipboard
*/
if ( bClipboardOpen && !CloseClipboard() )
hr = CLIPBRD_E_CANT_CLOSE;
if ( FAILED(hr) )
return hr;
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)
{
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, iface);
TRACE("(%p, %p)\n", iface, pformatetc);
/*
* If we have a data source placed on the clipboard (via OleSetClipboard)
* simply delegate to the source object's QueryGetData
*/
if ( This->pIDataObjectSrc )
{
return IDataObject_QueryGetData(This->pIDataObjectSrc, pformatetc);
}
if (!pformatetc)
return E_INVALIDARG;
/*
if ( pformatetc->dwAspect != DVASPECT_CONTENT )
return DV_E_DVASPECT;
*/
if ( pformatetc->lindex != -1 )
return DV_E_LINDEX;
/* TODO: Handle TYMED_IStorage media which were put on the clipboard
* by copying the storage into global memory. We must convert this
* TYMED_HGLOBAL back to TYMED_IStorage.
*/
if ( pformatetc->tymed != TYMED_HGLOBAL )
return DV_E_TYMED;
/*
* Delegate to the Windows clipboard function IsClipboardFormatAvailable
*/
return (IsClipboardFormatAvailable(pformatetc->cfFormat)) ? S_OK : DV_E_FORMATETC;
}
/************************************************************************
* 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;
memcpy(pformatetcOut, pformatectIn, sizeof(FORMATETC));
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** ppenumFormatEtc)
{
HRESULT hr = S_OK;
FORMATETC *afmt = NULL;
int cfmt, i;
UINT format;
BOOL bClipboardOpen;
/*
* Declare "This" pointer
*/
ICOM_THIS(OLEClipbrd, iface);
TRACE("(%p, %lx, %p)\n", iface, dwDirection, ppenumFormatEtc);
/*
* If we have a data source placed on the clipboard (via OleSetClipboard)
* simply delegate to the source object's EnumFormatEtc
*/
if ( This->pIDataObjectSrc )
{
return IDataObject_EnumFormatEtc(This->pIDataObjectSrc,
dwDirection, ppenumFormatEtc);
}
/*
* Otherwise we must provide our own enumerator which wraps around the
* Windows clipboard function EnumClipboardFormats
*/
if ( !ppenumFormatEtc )
return E_INVALIDARG;
if ( dwDirection != DATADIR_GET ) /* IDataObject_SetData not implemented */
return E_NOTIMPL;
/*
* Store all current clipboard formats in an array of FORMATETC's,
* and create an IEnumFORMATETC enumerator from this list.
*/
cfmt = CountClipboardFormats();
afmt = (FORMATETC *)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY,
sizeof(FORMATETC) * cfmt);
/*
* Open the Windows clipboard, associating it with our hidden window
*/
if ( !(bClipboardOpen = OpenClipboard(This->hWndClipboard)) )
HANDLE_ERROR( CLIPBRD_E_CANT_OPEN );
/*
* Store all current clipboard formats in an array of FORMATETC's
* TODO: Handle TYMED_IStorage media which were put on the clipboard
* by copying the storage into global memory. We must convert this
* TYMED_HGLOBAL back to TYMED_IStorage.
*/
for (i = 0, format = 0; i < cfmt; i++)
{
format = EnumClipboardFormats(format);
if (!format) /* Failed! */
{
ERR("EnumClipboardFormats failed to return format!\n");
HANDLE_ERROR( E_FAIL );
}
/* Init the FORMATETC struct */
afmt[i].cfFormat = format;
afmt[i].ptd = NULL;
afmt[i].dwAspect = DVASPECT_CONTENT;
afmt[i].lindex = -1;
afmt[i].tymed = TYMED_HGLOBAL;
}
/*
* Create an EnumFORMATETC enumerator and return an
* EnumFORMATETC after bumping up its ref count
*/
*ppenumFormatEtc = OLEClipbrd_IEnumFORMATETC_Construct( cfmt, afmt, (LPUNKNOWN)iface);
if (!(*ppenumFormatEtc))
HANDLE_ERROR( E_OUTOFMEMORY );
if (FAILED( hr = IEnumFORMATETC_AddRef(*ppenumFormatEtc)))
HANDLE_ERROR( hr );
hr = S_OK;
CLEANUP:
/*
* Free the array of FORMATETC's
*/
if (afmt)
HeapFree(GetProcessHeap(), 0, afmt);
/*
* Close Windows clipboard
*/
if ( bClipboardOpen && !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;
}
/*---------------------------------------------------------------------*
* Implementation of the internal IEnumFORMATETC interface returned by
* the OLE clipboard's IDataObject.
*---------------------------------------------------------------------*/
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Construct (UINT, const FORMATETC, LPUNKNOWN)
*
* Creates an IEnumFORMATETC enumerator from an array of FORMATETC
* Structures. pUnkOuter is the outer unknown for reference counting only.
* NOTE: this does not AddRef the interface.
*/
LPENUMFORMATETC OLEClipbrd_IEnumFORMATETC_Construct(UINT cfmt, const FORMATETC afmt[],
LPUNKNOWN pUnkDataObj)
{
IEnumFORMATETCImpl* ef;
DWORD size=cfmt * sizeof(FORMATETC);
LPMALLOC pIMalloc;
ef = (IEnumFORMATETCImpl*)HeapAlloc(GetProcessHeap(),
HEAP_ZERO_MEMORY,
sizeof(IEnumFORMATETCImpl));
if (!ef)
return NULL;
ef->ref = 0;
ICOM_VTBL(ef) = &efvt;
ef->pUnkDataObj = pUnkDataObj;
ef->posFmt = 0;
ef->countFmt = cfmt;
if (FAILED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
return NULL;
ef->pFmt = (LPFORMATETC)IMalloc_Alloc(pIMalloc, size);
IMalloc_Release(pIMalloc);
if (ef->pFmt)
memcpy(ef->pFmt, afmt, size);
TRACE("(%p)->()\n",ef);
return (LPENUMFORMATETC)ef;
}
/************************************************************************
* 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)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
TRACE("(%p)->(\n\tIID:\t%s,%p)\n",This,debugstr_guid(riid),ppvObj);
/*
* Since enumerators are seperate objects from the parent data object
* we only need to support the IUnknown and IEnumFORMATETC interfaces
*/
*ppvObj = NULL;
if(IsEqualIID(riid, &IID_IUnknown))
{
*ppvObj = This;
}
else if(IsEqualIID(riid, &IID_IEnumFORMATETC))
{
*ppvObj = (IDataObject*)This;
}
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)
*
* Since enumerating formats only makes sense when our data object is around,
* we insure that it stays as long as we stay by calling our parents IUnknown
* for AddRef and Release. But since we are not controlled by the lifetime of
* the outer object, we still keep our own reference count in order to
* free ourselves.
*/
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_AddRef(LPENUMFORMATETC iface)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
TRACE("(%p)->(count=%lu)\n",This, This->ref);
if (This->pUnkDataObj)
IUnknown_AddRef(This->pUnkDataObj);
return ++(This->ref);
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Release (IUnknown)
*
* See Windows documentation for more details on IUnknown methods.
*/
static ULONG WINAPI OLEClipbrd_IEnumFORMATETC_Release(LPENUMFORMATETC iface)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
LPMALLOC pIMalloc;
TRACE("(%p)->(count=%lu)\n",This, This->ref);
if (This->pUnkDataObj)
IUnknown_Release(This->pUnkDataObj); /* Release parent data object */
if (!--(This->ref))
{
TRACE("() - destroying IEnumFORMATETC(%p)\n",This);
if (SUCCEEDED(CoGetMalloc(MEMCTX_TASK, &pIMalloc)))
{
IMalloc_Free(pIMalloc, This->pFmt);
IMalloc_Release(pIMalloc);
}
HeapFree(GetProcessHeap(),0,This);
return 0;
}
return This->ref;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Next (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Next
(LPENUMFORMATETC iface, ULONG celt, FORMATETC *rgelt, ULONG *pceltFethed)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
UINT cfetch;
HRESULT hres = S_FALSE;
TRACE("(%p)->(pos=%u)\n", This, This->posFmt);
if (This->posFmt < This->countFmt)
{
cfetch = This->countFmt - This->posFmt;
if (cfetch >= celt)
{
cfetch = celt;
hres = S_OK;
}
memcpy(rgelt, &This->pFmt[This->posFmt], cfetch * sizeof(FORMATETC));
This->posFmt += cfetch;
}
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)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
TRACE("(%p)->(num=%lu)\n", This, celt);
This->posFmt += celt;
if (This->posFmt > This->countFmt)
{
This->posFmt = This->countFmt;
return S_FALSE;
}
return S_OK;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Reset (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Reset(LPENUMFORMATETC iface)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
TRACE("(%p)->()\n", This);
This->posFmt = 0;
return S_OK;
}
/************************************************************************
* OLEClipbrd_IEnumFORMATETC_Clone (IEnumFORMATETC)
*
* Standard enumerator members for IEnumFORMATETC
*/
static HRESULT WINAPI OLEClipbrd_IEnumFORMATETC_Clone
(LPENUMFORMATETC iface, LPENUMFORMATETC* ppenum)
{
ICOM_THIS(IEnumFORMATETCImpl,iface);
HRESULT hr = S_OK;
TRACE("(%p)->(ppenum=%p)\n", This, ppenum);
if ( !ppenum )
return E_INVALIDARG;
*ppenum = OLEClipbrd_IEnumFORMATETC_Construct(This->countFmt,
This->pFmt,
This->pUnkDataObj);
if (FAILED( hr = IEnumFORMATETC_AddRef(*ppenum)))
return ( hr );
return (*ppenum) ? S_OK : E_OUTOFMEMORY;
}
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