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Sweden-Number/dlls/ole32/datacache.c

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/*
* OLE 2 Data cache
*
* Copyright 1999 Francis Beaudet
* Copyright 2000 Abey George
*
* 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:
* The OLE2 data cache supports a whole whack of
* interfaces including:
* IDataObject, IPersistStorage, IViewObject2,
* IOleCache2 and IOleCacheControl.
*
* Most of the implementation details are taken from: Inside OLE
* second edition by Kraig Brockschmidt,
*
* NOTES
* - This implementation of the datacache will let your application
* load documents that have embedded OLE objects in them and it will
* also retrieve the metafile representation of those objects.
* - This implementation of the datacache will also allow your
* application to save new documents with OLE objects in them.
* - The main thing that it doesn't do is allow you to activate
* or modify the OLE objects in any way.
* - I haven't found any good documentation on the real usage of
* the streams created by the data cache. In particular, How to
* determine what the XXX stands for in the stream name
* "\002OlePresXXX". It appears to just be a counter.
* - Also, I don't know the real content of the presentation stream
* header. I was able to figure-out where the extent of the object
* was stored and the aspect, but that's about it.
*/
#include <stdarg.h>
#include <string.h>
#define COBJMACROS
#define NONAMELESSUNION
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "ole2.h"
#include "compobj_private.h"
#include "wine/unicode.h"
#include "wine/list.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
/****************************************************************************
* PresentationDataHeader
*
* This structure represents the header of the \002OlePresXXX stream in
* the OLE object storage.
*/
typedef struct PresentationDataHeader
{
/* clipformat:
* - standard clipformat:
* DWORD length = 0xffffffff;
* DWORD cfFormat;
* - or custom clipformat:
* DWORD length;
* CHAR format_name[length]; (null-terminated)
*/
DWORD unknown3; /* 4, possibly TYMED_ISTREAM */
DVASPECT dvAspect;
DWORD lindex;
DWORD tymed;
DWORD unknown7; /* 0 */
DWORD dwObjectExtentX;
DWORD dwObjectExtentY;
DWORD dwSize;
} PresentationDataHeader;
enum stream_type
{
no_stream,
pres_stream,
contents_stream
};
typedef struct DataCacheEntry
{
struct list entry;
/* format of this entry */
FORMATETC fmtetc;
/* the clipboard format of the data */
CLIPFORMAT data_cf;
/* cached data */
STGMEDIUM stgmedium;
/*
* This stream pointer is set through a call to
* IPersistStorage_Load. This is where the visual
* representation of the object is stored.
*/
IStream *stream;
enum stream_type stream_type;
/* connection ID */
DWORD id;
/* dirty flag */
BOOL dirty;
/* stream number (-1 if not set ) */
unsigned short stream_number;
/* sink id set when object is running */
DWORD sink_id;
/* Advise sink flags */
DWORD advise_flags;
} DataCacheEntry;
/****************************************************************************
* DataCache
*/
struct DataCache
{
/*
* List all interface here
*/
IUnknown IUnknown_inner;
IDataObject IDataObject_iface;
IPersistStorage IPersistStorage_iface;
IViewObject2 IViewObject2_iface;
IOleCache2 IOleCache2_iface;
IOleCacheControl IOleCacheControl_iface;
/* The sink that is connected to a remote object.
The other interfaces are not available by QI'ing the sink and vice-versa */
IAdviseSink IAdviseSink_iface;
/*
* Reference count of this object
*/
LONG ref;
/*
* IUnknown implementation of the outer object.
*/
IUnknown *outer_unk;
/*
* The user of this object can setup ONE advise sink
* connection with the object. These parameters describe
* that connection.
*/
DWORD sinkAspects;
DWORD sinkAdviseFlag;
IAdviseSink* sinkInterface;
IStorage *presentationStorage;
/* list of cache entries */
struct list cache_list;
/* last id assigned to an entry */
DWORD last_cache_id;
/* dirty flag */
BOOL dirty;
/* running object set by OnRun */
IDataObject *running_object;
};
typedef struct DataCache DataCache;
/*
* Here, I define utility macros to help with the casting of the
* "this" parameter.
* There is a version to accommodate all of the VTables implemented
* by this object.
*/
static inline DataCache *impl_from_IDataObject( IDataObject *iface )
{
return CONTAINING_RECORD(iface, DataCache, IDataObject_iface);
}
static inline DataCache *impl_from_IUnknown( IUnknown *iface )
{
return CONTAINING_RECORD(iface, DataCache, IUnknown_inner);
}
static inline DataCache *impl_from_IPersistStorage( IPersistStorage *iface )
{
return CONTAINING_RECORD(iface, DataCache, IPersistStorage_iface);
}
static inline DataCache *impl_from_IViewObject2( IViewObject2 *iface )
{
return CONTAINING_RECORD(iface, DataCache, IViewObject2_iface);
}
static inline DataCache *impl_from_IOleCache2( IOleCache2 *iface )
{
return CONTAINING_RECORD(iface, DataCache, IOleCache2_iface);
}
static inline DataCache *impl_from_IOleCacheControl( IOleCacheControl *iface )
{
return CONTAINING_RECORD(iface, DataCache, IOleCacheControl_iface);
}
static inline DataCache *impl_from_IAdviseSink( IAdviseSink *iface )
{
return CONTAINING_RECORD(iface, DataCache, IAdviseSink_iface);
}
const char *debugstr_formatetc(const FORMATETC *formatetc)
{
return wine_dbg_sprintf("{ cfFormat = 0x%x, ptd = %p, dwAspect = %d, lindex = %d, tymed = %d }",
formatetc->cfFormat, formatetc->ptd, formatetc->dwAspect,
formatetc->lindex, formatetc->tymed);
}
/***********************************************************************
* bitmap_info_size
*
* Return the size of the bitmap info structure including color table.
*/
int bitmap_info_size( const BITMAPINFO * info, WORD coloruse )
{
unsigned int colors, size, masks = 0;
if (info->bmiHeader.biSize == sizeof(BITMAPCOREHEADER))
{
const BITMAPCOREHEADER *core = (const BITMAPCOREHEADER *)info;
colors = (core->bcBitCount <= 8) ? 1 << core->bcBitCount : 0;
return sizeof(BITMAPCOREHEADER) + colors *
((coloruse == DIB_RGB_COLORS) ? sizeof(RGBTRIPLE) : sizeof(WORD));
}
else /* assume BITMAPINFOHEADER */
{
colors = info->bmiHeader.biClrUsed;
if (colors > 256) /* buffer overflow otherwise */
colors = 256;
if (!colors && (info->bmiHeader.biBitCount <= 8))
colors = 1 << info->bmiHeader.biBitCount;
if (info->bmiHeader.biCompression == BI_BITFIELDS) masks = 3;
size = max( info->bmiHeader.biSize, sizeof(BITMAPINFOHEADER) + masks * sizeof(DWORD) );
return size + colors * ((coloruse == DIB_RGB_COLORS) ? sizeof(RGBQUAD) : sizeof(WORD));
}
}
static void DataCacheEntry_Destroy(DataCache *cache, DataCacheEntry *cache_entry)
{
list_remove(&cache_entry->entry);
if (cache_entry->stream)
IStream_Release(cache_entry->stream);
CoTaskMemFree(cache_entry->fmtetc.ptd);
ReleaseStgMedium(&cache_entry->stgmedium);
if(cache_entry->sink_id)
IDataObject_DUnadvise(cache->running_object, cache_entry->sink_id);
HeapFree(GetProcessHeap(), 0, cache_entry);
}
static void DataCache_Destroy(
DataCache* ptrToDestroy)
{
DataCacheEntry *cache_entry, *next_cache_entry;
TRACE("()\n");
if (ptrToDestroy->sinkInterface != NULL)
{
IAdviseSink_Release(ptrToDestroy->sinkInterface);
ptrToDestroy->sinkInterface = NULL;
}
LIST_FOR_EACH_ENTRY_SAFE(cache_entry, next_cache_entry, &ptrToDestroy->cache_list, DataCacheEntry, entry)
DataCacheEntry_Destroy(ptrToDestroy, cache_entry);
if (ptrToDestroy->presentationStorage != NULL)
{
IStorage_Release(ptrToDestroy->presentationStorage);
ptrToDestroy->presentationStorage = NULL;
}
/*
* Free the datacache pointer.
*/
HeapFree(GetProcessHeap(), 0, ptrToDestroy);
}
static DataCacheEntry *DataCache_GetEntryForFormatEtc(DataCache *This, const FORMATETC *formatetc)
{
DataCacheEntry *cache_entry;
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
/* FIXME: also compare DVTARGETDEVICEs */
if ((!cache_entry->fmtetc.cfFormat || !formatetc->cfFormat || (formatetc->cfFormat == cache_entry->fmtetc.cfFormat)) &&
(formatetc->dwAspect == cache_entry->fmtetc.dwAspect) &&
(formatetc->lindex == cache_entry->fmtetc.lindex) &&
(!cache_entry->fmtetc.tymed || !formatetc->tymed || (formatetc->tymed == cache_entry->fmtetc.tymed)))
return cache_entry;
}
return NULL;
}
/* checks that the clipformat and tymed are valid and returns an error if they
* aren't and CACHE_S_NOTSUPPORTED if they are valid, but can't be rendered by
* DataCache_Draw */
static HRESULT check_valid_clipformat_and_tymed(CLIPFORMAT cfFormat, DWORD tymed, BOOL load)
{
if (!cfFormat || !tymed ||
(cfFormat == CF_METAFILEPICT && (tymed == TYMED_MFPICT || load)) ||
(cfFormat == CF_BITMAP && tymed == TYMED_GDI) ||
(cfFormat == CF_DIB && tymed == TYMED_HGLOBAL) ||
(cfFormat == CF_ENHMETAFILE && tymed == TYMED_ENHMF))
return S_OK;
else if (tymed == TYMED_HGLOBAL)
return CACHE_S_FORMATETC_NOTSUPPORTED;
else
{
WARN("invalid clipformat/tymed combination: %d/%d\n", cfFormat, tymed);
return DV_E_TYMED;
}
}
static BOOL init_cache_entry(DataCacheEntry *entry, const FORMATETC *fmt, DWORD advf,
DWORD id)
{
HRESULT hr;
hr = copy_formatetc(&entry->fmtetc, fmt);
if (FAILED(hr)) return FALSE;
entry->data_cf = 0;
entry->stgmedium.tymed = TYMED_NULL;
entry->stgmedium.pUnkForRelease = NULL;
entry->stream = NULL;
entry->stream_type = no_stream;
entry->id = id;
entry->dirty = TRUE;
entry->stream_number = -1;
entry->sink_id = 0;
entry->advise_flags = advf;
return TRUE;
}
static HRESULT DataCache_CreateEntry(DataCache *This, const FORMATETC *formatetc, DWORD advf,
DataCacheEntry **cache_entry, BOOL load)
{
HRESULT hr;
hr = check_valid_clipformat_and_tymed(formatetc->cfFormat, formatetc->tymed, load);
if (FAILED(hr))
return hr;
if (hr == CACHE_S_FORMATETC_NOTSUPPORTED)
TRACE("creating unsupported format %d\n", formatetc->cfFormat);
*cache_entry = HeapAlloc(GetProcessHeap(), 0, sizeof(**cache_entry));
if (!*cache_entry)
return E_OUTOFMEMORY;
if (!init_cache_entry(*cache_entry, formatetc, advf, This->last_cache_id))
goto fail;
list_add_tail(&This->cache_list, &(*cache_entry)->entry);
This->last_cache_id++;
return hr;
fail:
HeapFree(GetProcessHeap(), 0, *cache_entry);
return E_OUTOFMEMORY;
}
/************************************************************************
* DataCache_FireOnViewChange
*
* This method will fire an OnViewChange notification to the advise
* sink registered with the datacache.
*
* See IAdviseSink::OnViewChange for more details.
*/
static void DataCache_FireOnViewChange(
DataCache* this,
DWORD aspect,
LONG lindex)
{
TRACE("(%p, %x, %d)\n", this, aspect, lindex);
/*
* The sink supplies a filter when it registers
* we make sure we only send the notifications when that
* filter matches.
*/
if ((this->sinkAspects & aspect) != 0)
{
if (this->sinkInterface != NULL)
{
IAdviseSink_OnViewChange(this->sinkInterface,
aspect,
lindex);
/*
* Some sinks want to be unregistered automatically when
* the first notification goes out.
*/
if ( (this->sinkAdviseFlag & ADVF_ONLYONCE) != 0)
{
IAdviseSink_Release(this->sinkInterface);
this->sinkInterface = NULL;
this->sinkAspects = 0;
this->sinkAdviseFlag = 0;
}
}
}
}
/* Helper for DataCacheEntry_OpenPresStream */
static BOOL DataCache_IsPresentationStream(const STATSTG *elem)
{
/* The presentation streams have names of the form "\002OlePresXXX",
* where XXX goes from 000 to 999. */
static const WCHAR OlePres[] = { 2,'O','l','e','P','r','e','s' };
LPCWSTR name = elem->pwcsName;
return (elem->type == STGTY_STREAM)
&& (strlenW(name) == 11)
&& (strncmpW(name, OlePres, 8) == 0)
&& (name[8] >= '0') && (name[8] <= '9')
&& (name[9] >= '0') && (name[9] <= '9')
&& (name[10] >= '0') && (name[10] <= '9');
}
static HRESULT read_clipformat(IStream *stream, CLIPFORMAT *clipformat)
{
DWORD length;
HRESULT hr;
ULONG read;
*clipformat = 0;
hr = IStream_Read(stream, &length, sizeof(length), &read);
if (hr != S_OK || read != sizeof(length))
return DV_E_CLIPFORMAT;
if (length == -1)
{
DWORD cf;
hr = IStream_Read(stream, &cf, sizeof(cf), &read);
if (hr != S_OK || read != sizeof(cf))
return DV_E_CLIPFORMAT;
*clipformat = cf;
}
else
{
char *format_name = HeapAlloc(GetProcessHeap(), 0, length);
if (!format_name)
return E_OUTOFMEMORY;
hr = IStream_Read(stream, format_name, length, &read);
if (hr != S_OK || read != length || format_name[length - 1] != '\0')
{
HeapFree(GetProcessHeap(), 0, format_name);
return DV_E_CLIPFORMAT;
}
*clipformat = RegisterClipboardFormatA(format_name);
HeapFree(GetProcessHeap(), 0, format_name);
}
return S_OK;
}
static HRESULT write_clipformat(IStream *stream, CLIPFORMAT clipformat)
{
DWORD length;
HRESULT hr;
if (clipformat < 0xc000)
length = -1;
else
length = GetClipboardFormatNameA(clipformat, NULL, 0);
hr = IStream_Write(stream, &length, sizeof(length), NULL);
if (FAILED(hr))
return hr;
if (clipformat < 0xc000)
{
DWORD cf = clipformat;
hr = IStream_Write(stream, &cf, sizeof(cf), NULL);
}
else
{
char *format_name = HeapAlloc(GetProcessHeap(), 0, length);
if (!format_name)
return E_OUTOFMEMORY;
GetClipboardFormatNameA(clipformat, format_name, length);
hr = IStream_Write(stream, format_name, length, NULL);
HeapFree(GetProcessHeap(), 0, format_name);
}
return hr;
}
/************************************************************************
* DataCacheEntry_OpenPresStream
*
* This method will find the stream for the given presentation. It makes
* no attempt at fallback.
*
* Param:
* this - Pointer to the DataCache object
* drawAspect - The aspect of the object that we wish to draw.
* pStm - A returned stream. It points to the beginning of the
* - presentation data, including the header.
*
* Errors:
* S_OK The requested stream has been opened.
* OLE_E_BLANK The requested stream could not be found.
* Quite a few others I'm too lazy to map correctly.
*
* Notes:
* Algorithm: Scan the elements of the presentation storage, looking
* for presentation streams. For each presentation stream,
* load the header and check to see if the aspect matches.
*
* If a fallback is desired, just opening the first presentation stream
* is a possibility.
*/
static HRESULT DataCacheEntry_OpenPresStream(DataCacheEntry *cache_entry, IStream **ppStm)
{
HRESULT hr;
LARGE_INTEGER offset;
if (cache_entry->stream)
{
/* Rewind the stream before returning it. */
offset.QuadPart = 0;
hr = IStream_Seek( cache_entry->stream, offset, STREAM_SEEK_SET, NULL );
if (SUCCEEDED( hr ))
{
*ppStm = cache_entry->stream;
IStream_AddRef( cache_entry->stream );
}
}
else
hr = OLE_E_BLANK;
return hr;
}
static HRESULT load_mf_pict( DataCacheEntry *cache_entry, IStream *stm )
{
HRESULT hr;
STATSTG stat;
ULARGE_INTEGER current_pos;
void *bits;
METAFILEPICT *mfpict;
HGLOBAL hmfpict;
PresentationDataHeader header;
CLIPFORMAT clipformat;
static const LARGE_INTEGER offset_zero;
ULONG read;
if (cache_entry->stream_type != pres_stream)
{
FIXME( "Unimplemented for stream type %d\n", cache_entry->stream_type );
return E_FAIL;
}
hr = IStream_Stat( stm, &stat, STATFLAG_NONAME );
if (FAILED( hr )) return hr;
hr = read_clipformat( stm, &clipformat );
if (FAILED( hr )) return hr;
hr = IStream_Read( stm, &header, sizeof(header), &read );
if (hr != S_OK || read != sizeof(header)) return E_FAIL;
hr = IStream_Seek( stm, offset_zero, STREAM_SEEK_CUR, &current_pos );
if (FAILED( hr )) return hr;
stat.cbSize.QuadPart -= current_pos.QuadPart;
hmfpict = GlobalAlloc( GMEM_MOVEABLE, sizeof(METAFILEPICT) );
if (!hmfpict) return E_OUTOFMEMORY;
mfpict = GlobalLock( hmfpict );
bits = HeapAlloc( GetProcessHeap(), 0, stat.cbSize.u.LowPart);
if (!bits)
{
GlobalFree( hmfpict );
return E_OUTOFMEMORY;
}
hr = IStream_Read( stm, bits, stat.cbSize.u.LowPart, &read );
if (hr != S_OK || read != stat.cbSize.u.LowPart) hr = E_FAIL;
if (SUCCEEDED( hr ))
{
/* FIXME: get this from the stream */
mfpict->mm = MM_ANISOTROPIC;
mfpict->xExt = header.dwObjectExtentX;
mfpict->yExt = header.dwObjectExtentY;
mfpict->hMF = SetMetaFileBitsEx( stat.cbSize.u.LowPart, bits );
if (!mfpict->hMF)
hr = E_FAIL;
}
GlobalUnlock( hmfpict );
if (SUCCEEDED( hr ))
{
cache_entry->data_cf = cache_entry->fmtetc.cfFormat;
cache_entry->stgmedium.tymed = TYMED_MFPICT;
cache_entry->stgmedium.u.hMetaFilePict = hmfpict;
}
else
GlobalFree( hmfpict );
HeapFree( GetProcessHeap(), 0, bits );
return hr;
}
static HRESULT load_dib( DataCacheEntry *cache_entry, IStream *stm )
{
HRESULT hr;
STATSTG stat;
void *dib;
HGLOBAL hglobal;
ULONG read, info_size, bi_size;
BITMAPFILEHEADER file;
BITMAPINFOHEADER *info;
if (cache_entry->stream_type != contents_stream)
{
FIXME( "Unimplemented for stream type %d\n", cache_entry->stream_type );
return E_FAIL;
}
hr = IStream_Stat( stm, &stat, STATFLAG_NONAME );
if (FAILED( hr )) return hr;
if (stat.cbSize.QuadPart < sizeof(file) + sizeof(DWORD)) return E_FAIL;
hr = IStream_Read( stm, &file, sizeof(file), &read );
if (hr != S_OK || read != sizeof(file)) return E_FAIL;
stat.cbSize.QuadPart -= sizeof(file);
hglobal = GlobalAlloc( GMEM_MOVEABLE, stat.cbSize.u.LowPart );
if (!hglobal) return E_OUTOFMEMORY;
dib = GlobalLock( hglobal );
hr = IStream_Read( stm, dib, sizeof(DWORD), &read );
if (hr != S_OK || read != sizeof(DWORD)) goto fail;
bi_size = *(DWORD *)dib;
if (stat.cbSize.QuadPart < bi_size) goto fail;
hr = IStream_Read( stm, (char *)dib + sizeof(DWORD), bi_size - sizeof(DWORD), &read );
if (hr != S_OK || read != bi_size - sizeof(DWORD)) goto fail;
info_size = bitmap_info_size( dib, DIB_RGB_COLORS );
if (stat.cbSize.QuadPart < info_size) goto fail;
if (info_size > bi_size)
{
hr = IStream_Read( stm, (char *)dib + bi_size, info_size - bi_size, &read );
if (hr != S_OK || read != info_size - bi_size) goto fail;
}
stat.cbSize.QuadPart -= info_size;
if (file.bfOffBits)
{
LARGE_INTEGER skip;
skip.QuadPart = file.bfOffBits - sizeof(file) - info_size;
if (stat.cbSize.QuadPart < skip.QuadPart) goto fail;
hr = IStream_Seek( stm, skip, STREAM_SEEK_CUR, NULL );
if (hr != S_OK) goto fail;
stat.cbSize.QuadPart -= skip.QuadPart;
}
hr = IStream_Read( stm, (char *)dib + info_size, stat.cbSize.u.LowPart, &read );
if (hr != S_OK || read != stat.cbSize.QuadPart) goto fail;
if (bi_size >= sizeof(*info))
{
info = (BITMAPINFOHEADER *)dib;
if (info->biXPelsPerMeter == 0 || info->biYPelsPerMeter == 0)
{
HDC hdc = GetDC( 0 );
info->biXPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSX ), 10000, 254 );
info->biYPelsPerMeter = MulDiv( GetDeviceCaps( hdc, LOGPIXELSY ), 10000, 254 );
ReleaseDC( 0, hdc );
}
}
GlobalUnlock( hglobal );
cache_entry->data_cf = cache_entry->fmtetc.cfFormat;
cache_entry->stgmedium.tymed = TYMED_HGLOBAL;
cache_entry->stgmedium.u.hGlobal = hglobal;
return S_OK;
fail:
GlobalUnlock( hglobal );
GlobalFree( hglobal );
return E_FAIL;
}
/************************************************************************
* DataCacheEntry_LoadData
*
* This method will read information for the requested presentation
* into the given structure.
*
* Param:
* This - The entry to load the data from.
*
* Returns:
* This method returns a metafile handle if it is successful.
* it will return 0 if not.
*/
static HRESULT DataCacheEntry_LoadData(DataCacheEntry *cache_entry)
{
HRESULT hr;
IStream *stm;
hr = DataCacheEntry_OpenPresStream( cache_entry, &stm );
if (FAILED(hr)) return hr;
switch (cache_entry->fmtetc.cfFormat)
{
case CF_METAFILEPICT:
hr = load_mf_pict( cache_entry, stm );
break;
case CF_DIB:
hr = load_dib( cache_entry, stm );
break;
default:
FIXME( "Unimplemented clip format %x\n", cache_entry->fmtetc.cfFormat );
hr = E_NOTIMPL;
}
IStream_Release( stm );
return hr;
}
static HRESULT DataCacheEntry_CreateStream(DataCacheEntry *cache_entry,
IStorage *storage, IStream **stream)
{
WCHAR wszName[] = {2,'O','l','e','P','r','e','s',
'0' + (cache_entry->stream_number / 100) % 10,
'0' + (cache_entry->stream_number / 10) % 10,
'0' + cache_entry->stream_number % 10, 0};
/* FIXME: cache the created stream in This? */
return IStorage_CreateStream(storage, wszName,
STGM_READWRITE | STGM_SHARE_EXCLUSIVE | STGM_CREATE,
0, 0, stream);
}
static HRESULT DataCacheEntry_Save(DataCacheEntry *cache_entry, IStorage *storage,
BOOL same_as_load)
{
PresentationDataHeader header;
HRESULT hr;
IStream *pres_stream;
void *data = NULL;
TRACE("stream_number = %d, fmtetc = %s\n", cache_entry->stream_number, debugstr_formatetc(&cache_entry->fmtetc));
hr = DataCacheEntry_CreateStream(cache_entry, storage, &pres_stream);
if (FAILED(hr))
return hr;
hr = write_clipformat(pres_stream, cache_entry->data_cf);
if (FAILED(hr))
return hr;
if (cache_entry->fmtetc.ptd)
FIXME("ptd not serialized\n");
header.unknown3 = 4;
header.dvAspect = cache_entry->fmtetc.dwAspect;
header.lindex = cache_entry->fmtetc.lindex;
header.tymed = cache_entry->stgmedium.tymed;
header.unknown7 = 0;
header.dwObjectExtentX = 0;
header.dwObjectExtentY = 0;
header.dwSize = 0;
/* size the data */
switch (cache_entry->data_cf)
{
case CF_METAFILEPICT:
{
if (cache_entry->stgmedium.tymed != TYMED_NULL)
{
const METAFILEPICT *mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict);
if (!mfpict)
{
IStream_Release(pres_stream);
return DV_E_STGMEDIUM;
}
header.dwObjectExtentX = mfpict->xExt;
header.dwObjectExtentY = mfpict->yExt;
header.dwSize = GetMetaFileBitsEx(mfpict->hMF, 0, NULL);
GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
}
break;
}
default:
break;
}
/*
* Write the header.
*/
hr = IStream_Write(pres_stream, &header, sizeof(PresentationDataHeader),
NULL);
if (FAILED(hr))
{
IStream_Release(pres_stream);
return hr;
}
/* get the data */
switch (cache_entry->data_cf)
{
case CF_METAFILEPICT:
{
if (cache_entry->stgmedium.tymed != TYMED_NULL)
{
const METAFILEPICT *mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict);
if (!mfpict)
{
IStream_Release(pres_stream);
return DV_E_STGMEDIUM;
}
data = HeapAlloc(GetProcessHeap(), 0, header.dwSize);
GetMetaFileBitsEx(mfpict->hMF, header.dwSize, data);
GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
}
break;
}
default:
break;
}
if (data)
hr = IStream_Write(pres_stream, data, header.dwSize, NULL);
HeapFree(GetProcessHeap(), 0, data);
IStream_Release(pres_stream);
return hr;
}
/* helper for copying STGMEDIUM of type bitmap, MF, EMF or HGLOBAL.
* does no checking of whether src_stgm has a supported tymed, so this should be
* done in the caller */
static HRESULT copy_stg_medium(CLIPFORMAT cf, STGMEDIUM *dest_stgm,
const STGMEDIUM *src_stgm)
{
if (src_stgm->tymed == TYMED_MFPICT)
{
const METAFILEPICT *src_mfpict = GlobalLock(src_stgm->u.hMetaFilePict);
METAFILEPICT *dest_mfpict;
if (!src_mfpict)
return DV_E_STGMEDIUM;
dest_stgm->u.hMetaFilePict = GlobalAlloc(GMEM_MOVEABLE, sizeof(METAFILEPICT));
dest_mfpict = GlobalLock(dest_stgm->u.hMetaFilePict);
if (!dest_mfpict)
{
GlobalUnlock(src_stgm->u.hMetaFilePict);
return E_OUTOFMEMORY;
}
*dest_mfpict = *src_mfpict;
dest_mfpict->hMF = CopyMetaFileW(src_mfpict->hMF, NULL);
GlobalUnlock(src_stgm->u.hMetaFilePict);
GlobalUnlock(dest_stgm->u.hMetaFilePict);
}
else if (src_stgm->tymed != TYMED_NULL)
{
dest_stgm->u.hGlobal = OleDuplicateData(src_stgm->u.hGlobal, cf,
GMEM_MOVEABLE);
if (!dest_stgm->u.hGlobal)
return E_OUTOFMEMORY;
}
dest_stgm->tymed = src_stgm->tymed;
dest_stgm->pUnkForRelease = src_stgm->pUnkForRelease;
if (dest_stgm->pUnkForRelease)
IUnknown_AddRef(dest_stgm->pUnkForRelease);
return S_OK;
}
static HRESULT DataCacheEntry_SetData(DataCacheEntry *cache_entry,
const FORMATETC *formatetc,
const STGMEDIUM *stgmedium,
BOOL fRelease)
{
if ((!cache_entry->fmtetc.cfFormat && !formatetc->cfFormat) ||
(cache_entry->fmtetc.tymed == TYMED_NULL && formatetc->tymed == TYMED_NULL) ||
stgmedium->tymed == TYMED_NULL)
{
WARN("invalid formatetc\n");
return DV_E_FORMATETC;
}
cache_entry->dirty = TRUE;
ReleaseStgMedium(&cache_entry->stgmedium);
cache_entry->data_cf = cache_entry->fmtetc.cfFormat ? cache_entry->fmtetc.cfFormat : formatetc->cfFormat;
if (fRelease)
{
cache_entry->stgmedium = *stgmedium;
return S_OK;
}
else
return copy_stg_medium(cache_entry->data_cf,
&cache_entry->stgmedium, stgmedium);
}
static HRESULT DataCacheEntry_GetData(DataCacheEntry *cache_entry, STGMEDIUM *stgmedium)
{
if (stgmedium->tymed == TYMED_NULL && cache_entry->stream)
{
HRESULT hr = DataCacheEntry_LoadData(cache_entry);
if (FAILED(hr))
return hr;
}
if (cache_entry->stgmedium.tymed == TYMED_NULL)
return OLE_E_BLANK;
return copy_stg_medium(cache_entry->data_cf, stgmedium, &cache_entry->stgmedium);
}
static inline HRESULT DataCacheEntry_DiscardData(DataCacheEntry *cache_entry)
{
ReleaseStgMedium(&cache_entry->stgmedium);
cache_entry->data_cf = cache_entry->fmtetc.cfFormat;
return S_OK;
}
static inline void DataCacheEntry_HandsOffStorage(DataCacheEntry *cache_entry)
{
if (cache_entry->stream)
{
IStream_Release(cache_entry->stream);
cache_entry->stream = NULL;
}
}
/*********************************************************
* Method implementation for the non delegating IUnknown
* part of the DataCache class.
*/
/************************************************************************
* DataCache_NDIUnknown_QueryInterface (IUnknown)
*
* This version of QueryInterface will not delegate its implementation
* to the outer unknown.
*/
static HRESULT WINAPI DataCache_NDIUnknown_QueryInterface(
IUnknown* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IUnknown(iface);
if ( ppvObject==0 )
return E_INVALIDARG;
*ppvObject = 0;
if (IsEqualIID(&IID_IUnknown, riid))
{
*ppvObject = iface;
}
else if (IsEqualIID(&IID_IDataObject, riid))
{
*ppvObject = &this->IDataObject_iface;
}
else if ( IsEqualIID(&IID_IPersistStorage, riid) ||
IsEqualIID(&IID_IPersist, riid) )
{
*ppvObject = &this->IPersistStorage_iface;
}
else if ( IsEqualIID(&IID_IViewObject, riid) ||
IsEqualIID(&IID_IViewObject2, riid) )
{
*ppvObject = &this->IViewObject2_iface;
}
else if ( IsEqualIID(&IID_IOleCache, riid) ||
IsEqualIID(&IID_IOleCache2, riid) )
{
*ppvObject = &this->IOleCache2_iface;
}
else if ( IsEqualIID(&IID_IOleCacheControl, riid) )
{
*ppvObject = &this->IOleCacheControl_iface;
}
if ((*ppvObject)==0)
{
WARN( "() : asking for unsupported interface %s\n", debugstr_guid(riid));
return E_NOINTERFACE;
}
IUnknown_AddRef((IUnknown*)*ppvObject);
return S_OK;
}
/************************************************************************
* DataCache_NDIUnknown_AddRef (IUnknown)
*
* This version of QueryInterface will not delegate its implementation
* to the outer unknown.
*/
static ULONG WINAPI DataCache_NDIUnknown_AddRef(
IUnknown* iface)
{
DataCache *this = impl_from_IUnknown(iface);
return InterlockedIncrement(&this->ref);
}
/************************************************************************
* DataCache_NDIUnknown_Release (IUnknown)
*
* This version of QueryInterface will not delegate its implementation
* to the outer unknown.
*/
static ULONG WINAPI DataCache_NDIUnknown_Release(
IUnknown* iface)
{
DataCache *this = impl_from_IUnknown(iface);
ULONG ref;
ref = InterlockedDecrement(&this->ref);
if (ref == 0) DataCache_Destroy(this);
return ref;
}
/*********************************************************
* Method implementation for the IDataObject
* part of the DataCache class.
*/
/************************************************************************
* DataCache_IDataObject_QueryInterface (IUnknown)
*/
static HRESULT WINAPI DataCache_IDataObject_QueryInterface(
IDataObject* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IDataObject(iface);
return IUnknown_QueryInterface(this->outer_unk, riid, ppvObject);
}
/************************************************************************
* DataCache_IDataObject_AddRef (IUnknown)
*/
static ULONG WINAPI DataCache_IDataObject_AddRef(
IDataObject* iface)
{
DataCache *this = impl_from_IDataObject(iface);
return IUnknown_AddRef(this->outer_unk);
}
/************************************************************************
* DataCache_IDataObject_Release (IUnknown)
*/
static ULONG WINAPI DataCache_IDataObject_Release(
IDataObject* iface)
{
DataCache *this = impl_from_IDataObject(iface);
return IUnknown_Release(this->outer_unk);
}
/************************************************************************
* DataCache_GetData
*
* Get Data from a source dataobject using format pformatetcIn->cfFormat
*/
static HRESULT WINAPI DataCache_GetData(
IDataObject* iface,
LPFORMATETC pformatetcIn,
STGMEDIUM* pmedium)
{
DataCache *This = impl_from_IDataObject(iface);
DataCacheEntry *cache_entry;
memset(pmedium, 0, sizeof(*pmedium));
cache_entry = DataCache_GetEntryForFormatEtc(This, pformatetcIn);
if (!cache_entry)
return OLE_E_BLANK;
return DataCacheEntry_GetData(cache_entry, pmedium);
}
static HRESULT WINAPI DataCache_GetDataHere(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium)
{
FIXME("stub\n");
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_QueryGetData( IDataObject *iface, FORMATETC *fmt )
{
DataCache *This = impl_from_IDataObject( iface );
DataCacheEntry *cache_entry;
TRACE( "(%p)->(%s)\n", iface, debugstr_formatetc( fmt ) );
cache_entry = DataCache_GetEntryForFormatEtc( This, fmt );
return cache_entry ? S_OK : S_FALSE;
}
/************************************************************************
* DataCache_EnumFormatEtc (IDataObject)
*
* The data cache doesn't implement this method.
*/
static HRESULT WINAPI DataCache_GetCanonicalFormatEtc(
IDataObject* iface,
LPFORMATETC pformatectIn,
LPFORMATETC pformatetcOut)
{
TRACE("()\n");
return E_NOTIMPL;
}
/************************************************************************
* DataCache_IDataObject_SetData (IDataObject)
*
* This method is delegated to the IOleCache2 implementation.
*/
static HRESULT WINAPI DataCache_IDataObject_SetData(
IDataObject* iface,
LPFORMATETC pformatetc,
STGMEDIUM* pmedium,
BOOL fRelease)
{
IOleCache2* oleCache = NULL;
HRESULT hres;
TRACE("(%p, %p, %p, %d)\n", iface, pformatetc, pmedium, fRelease);
hres = IDataObject_QueryInterface(iface, &IID_IOleCache2, (void**)&oleCache);
if (FAILED(hres))
return E_UNEXPECTED;
hres = IOleCache2_SetData(oleCache, pformatetc, pmedium, fRelease);
IOleCache2_Release(oleCache);
return hres;
}
/************************************************************************
* DataCache_EnumFormatEtc (IDataObject)
*
* The data cache doesn't implement this method.
*/
static HRESULT WINAPI DataCache_EnumFormatEtc(
IDataObject* iface,
DWORD dwDirection,
IEnumFORMATETC** ppenumFormatEtc)
{
TRACE("()\n");
return E_NOTIMPL;
}
/************************************************************************
* DataCache_DAdvise (IDataObject)
*
* The data cache doesn't support connections.
*/
static HRESULT WINAPI DataCache_DAdvise(
IDataObject* iface,
FORMATETC* pformatetc,
DWORD advf,
IAdviseSink* pAdvSink,
DWORD* pdwConnection)
{
TRACE("()\n");
return OLE_E_ADVISENOTSUPPORTED;
}
/************************************************************************
* DataCache_DUnadvise (IDataObject)
*
* The data cache doesn't support connections.
*/
static HRESULT WINAPI DataCache_DUnadvise(
IDataObject* iface,
DWORD dwConnection)
{
TRACE("()\n");
return OLE_E_NOCONNECTION;
}
/************************************************************************
* DataCache_EnumDAdvise (IDataObject)
*
* The data cache doesn't support connections.
*/
static HRESULT WINAPI DataCache_EnumDAdvise(
IDataObject* iface,
IEnumSTATDATA** ppenumAdvise)
{
TRACE("()\n");
return OLE_E_ADVISENOTSUPPORTED;
}
/*********************************************************
* Method implementation for the IDataObject
* part of the DataCache class.
*/
/************************************************************************
* DataCache_IPersistStorage_QueryInterface (IUnknown)
*/
static HRESULT WINAPI DataCache_IPersistStorage_QueryInterface(
IPersistStorage* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IPersistStorage(iface);
return IUnknown_QueryInterface(this->outer_unk, riid, ppvObject);
}
/************************************************************************
* DataCache_IPersistStorage_AddRef (IUnknown)
*/
static ULONG WINAPI DataCache_IPersistStorage_AddRef(
IPersistStorage* iface)
{
DataCache *this = impl_from_IPersistStorage(iface);
return IUnknown_AddRef(this->outer_unk);
}
/************************************************************************
* DataCache_IPersistStorage_Release (IUnknown)
*/
static ULONG WINAPI DataCache_IPersistStorage_Release(
IPersistStorage* iface)
{
DataCache *this = impl_from_IPersistStorage(iface);
return IUnknown_Release(this->outer_unk);
}
/************************************************************************
* DataCache_GetClassID (IPersistStorage)
*
*/
static HRESULT WINAPI DataCache_GetClassID(IPersistStorage *iface, CLSID *clsid)
{
DataCache *This = impl_from_IPersistStorage( iface );
HRESULT hr;
STATSTG statstg;
TRACE( "(%p, %p)\n", iface, clsid );
if (This->presentationStorage)
{
hr = IStorage_Stat( This->presentationStorage, &statstg, STATFLAG_NONAME );
if (SUCCEEDED(hr))
{
*clsid = statstg.clsid;
return S_OK;
}
}
*clsid = CLSID_NULL;
return S_OK;
}
/************************************************************************
* DataCache_IsDirty (IPersistStorage)
*/
static HRESULT WINAPI DataCache_IsDirty(
IPersistStorage* iface)
{
DataCache *This = impl_from_IPersistStorage(iface);
DataCacheEntry *cache_entry;
TRACE("(%p)\n", iface);
if (This->dirty)
return S_OK;
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
if (cache_entry->dirty)
return S_OK;
return S_FALSE;
}
/************************************************************************
* DataCache_InitNew (IPersistStorage)
*
* The data cache implementation of IPersistStorage_InitNew simply stores
* the storage pointer.
*/
static HRESULT WINAPI DataCache_InitNew(
IPersistStorage* iface,
IStorage* pStg)
{
DataCache *This = impl_from_IPersistStorage(iface);
TRACE("(%p, %p)\n", iface, pStg);
if (This->presentationStorage != NULL)
IStorage_Release(This->presentationStorage);
This->presentationStorage = pStg;
IStorage_AddRef(This->presentationStorage);
This->dirty = TRUE;
return S_OK;
}
static HRESULT add_cache_entry( DataCache *This, const FORMATETC *fmt, IStream *stm,
enum stream_type type )
{
DataCacheEntry *cache_entry;
HRESULT hr = S_OK;
TRACE( "loading entry with formatetc: %s\n", debugstr_formatetc( fmt ) );
cache_entry = DataCache_GetEntryForFormatEtc( This, fmt );
if (!cache_entry)
hr = DataCache_CreateEntry( This, fmt, 0, &cache_entry, TRUE );
if (SUCCEEDED( hr ))
{
DataCacheEntry_DiscardData( cache_entry );
if (cache_entry->stream) IStream_Release( cache_entry->stream );
cache_entry->stream = stm;
IStream_AddRef( stm );
cache_entry->stream_type = type;
cache_entry->dirty = FALSE;
}
return hr;
}
static HRESULT parse_pres_streams( DataCache *This, IStorage *stg )
{
HRESULT hr;
IEnumSTATSTG *stat_enum;
STATSTG stat;
IStream *stm;
PresentationDataHeader header;
ULONG actual_read;
CLIPFORMAT clipformat;
FORMATETC fmtetc;
hr = IStorage_EnumElements( stg, 0, NULL, 0, &stat_enum );
if (FAILED( hr )) return hr;
while ((hr = IEnumSTATSTG_Next( stat_enum, 1, &stat, NULL )) == S_OK)
{
if (DataCache_IsPresentationStream( &stat ))
{
hr = IStorage_OpenStream( stg, stat.pwcsName, NULL, STGM_READ | STGM_SHARE_EXCLUSIVE,
0, &stm );
if (SUCCEEDED( hr ))
{
hr = read_clipformat( stm, &clipformat );
if (hr == S_OK)
hr = IStream_Read( stm, &header, sizeof(header), &actual_read );
if (hr == S_OK && actual_read == sizeof(header))
{
fmtetc.cfFormat = clipformat;
fmtetc.ptd = NULL; /* FIXME */
fmtetc.dwAspect = header.dvAspect;
fmtetc.lindex = header.lindex;
fmtetc.tymed = header.tymed;
add_cache_entry( This, &fmtetc, stm, pres_stream );
}
IStream_Release( stm );
}
}
CoTaskMemFree( stat.pwcsName );
}
IEnumSTATSTG_Release( stat_enum );
return S_OK;
}
static const FORMATETC static_dib_fmt = { CF_DIB, NULL, DVASPECT_CONTENT, -1, TYMED_HGLOBAL };
static HRESULT parse_contents_stream( DataCache *This, IStorage *stg, IStream *stm )
{
HRESULT hr;
STATSTG stat;
const FORMATETC *fmt;
hr = IStorage_Stat( stg, &stat, STATFLAG_NONAME );
if (FAILED( hr )) return hr;
if (IsEqualCLSID( &stat.clsid, &CLSID_Picture_Dib ))
fmt = &static_dib_fmt;
else
{
FIXME("unsupported format %s\n", debugstr_guid( &stat.clsid ));
return E_FAIL;
}
return add_cache_entry( This, fmt, stm, contents_stream );
}
static const WCHAR CONTENTS[] = {'C','O','N','T','E','N','T','S',0};
/************************************************************************
* DataCache_Load (IPersistStorage)
*
* The data cache implementation of IPersistStorage_Load doesn't
* actually load anything. Instead, it holds on to the storage pointer
* and it will load the presentation information when the
* IDataObject_GetData or IViewObject2_Draw methods are called.
*/
static HRESULT WINAPI DataCache_Load( IPersistStorage *iface, IStorage *pStg )
{
DataCache *This = impl_from_IPersistStorage(iface);
HRESULT hr;
IStream *stm;
TRACE("(%p, %p)\n", iface, pStg);
IPersistStorage_HandsOffStorage( iface );
hr = IStorage_OpenStream( pStg, CONTENTS, NULL, STGM_READ | STGM_SHARE_EXCLUSIVE,
0, &stm );
if (SUCCEEDED( hr ))
{
hr = parse_contents_stream( This, pStg, stm );
IStream_Release( stm );
}
if (FAILED(hr))
hr = parse_pres_streams( This, pStg );
if (SUCCEEDED( hr ))
{
This->dirty = FALSE;
This->presentationStorage = pStg;
IStorage_AddRef( This->presentationStorage );
}
return hr;
}
/************************************************************************
* DataCache_Save (IPersistStorage)
*
* Until we actually connect to a running object and retrieve new
* information to it, we never have to save anything. However, it is
* our responsibility to copy the information when saving to a new
* storage.
*/
static HRESULT WINAPI DataCache_Save(
IPersistStorage* iface,
IStorage* pStg,
BOOL fSameAsLoad)
{
DataCache *This = impl_from_IPersistStorage(iface);
DataCacheEntry *cache_entry;
BOOL dirty = FALSE;
HRESULT hr = S_OK;
unsigned short stream_number = 0;
TRACE("(%p, %p, %d)\n", iface, pStg, fSameAsLoad);
dirty = This->dirty;
if (!dirty)
{
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
dirty = cache_entry->dirty;
if (dirty)
break;
}
}
/* this is a shortcut if nothing changed */
if (!dirty && !fSameAsLoad && This->presentationStorage)
{
return IStorage_CopyTo(This->presentationStorage, 0, NULL, NULL, pStg);
}
/* assign stream numbers to the cache entries */
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
if (cache_entry->stream_number != stream_number)
{
cache_entry->dirty = TRUE; /* needs to be written out again */
cache_entry->stream_number = stream_number;
}
stream_number++;
}
/* write out the cache entries */
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
if (!fSameAsLoad || cache_entry->dirty)
{
hr = DataCacheEntry_Save(cache_entry, pStg, fSameAsLoad);
if (FAILED(hr))
break;
cache_entry->dirty = FALSE;
}
}
This->dirty = FALSE;
return hr;
}
/************************************************************************
* DataCache_SaveCompleted (IPersistStorage)
*
* This method is called to tell the cache to release the storage
* pointer it's currently holding.
*/
static HRESULT WINAPI DataCache_SaveCompleted(
IPersistStorage* iface,
IStorage* pStgNew)
{
TRACE("(%p, %p)\n", iface, pStgNew);
if (pStgNew)
{
IPersistStorage_HandsOffStorage(iface);
DataCache_Load(iface, pStgNew);
}
return S_OK;
}
/************************************************************************
* DataCache_HandsOffStorage (IPersistStorage)
*
* This method is called to tell the cache to release the storage
* pointer it's currently holding.
*/
static HRESULT WINAPI DataCache_HandsOffStorage(
IPersistStorage* iface)
{
DataCache *this = impl_from_IPersistStorage(iface);
DataCacheEntry *cache_entry;
TRACE("(%p)\n", iface);
if (this->presentationStorage != NULL)
{
IStorage_Release(this->presentationStorage);
this->presentationStorage = NULL;
}
LIST_FOR_EACH_ENTRY(cache_entry, &this->cache_list, DataCacheEntry, entry)
DataCacheEntry_HandsOffStorage(cache_entry);
return S_OK;
}
/*********************************************************
* Method implementation for the IViewObject2
* part of the DataCache class.
*/
/************************************************************************
* DataCache_IViewObject2_QueryInterface (IUnknown)
*/
static HRESULT WINAPI DataCache_IViewObject2_QueryInterface(
IViewObject2* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IViewObject2(iface);
return IUnknown_QueryInterface(this->outer_unk, riid, ppvObject);
}
/************************************************************************
* DataCache_IViewObject2_AddRef (IUnknown)
*/
static ULONG WINAPI DataCache_IViewObject2_AddRef(
IViewObject2* iface)
{
DataCache *this = impl_from_IViewObject2(iface);
return IUnknown_AddRef(this->outer_unk);
}
/************************************************************************
* DataCache_IViewObject2_Release (IUnknown)
*/
static ULONG WINAPI DataCache_IViewObject2_Release(
IViewObject2* iface)
{
DataCache *this = impl_from_IViewObject2(iface);
return IUnknown_Release(this->outer_unk);
}
/************************************************************************
* DataCache_Draw (IViewObject2)
*
* This method will draw the cached representation of the object
* to the given device context.
*/
static HRESULT WINAPI DataCache_Draw(
IViewObject2* iface,
DWORD dwDrawAspect,
LONG lindex,
void* pvAspect,
DVTARGETDEVICE* ptd,
HDC hdcTargetDev,
HDC hdcDraw,
LPCRECTL lprcBounds,
LPCRECTL lprcWBounds,
BOOL (CALLBACK *pfnContinue)(ULONG_PTR dwContinue),
ULONG_PTR dwContinue)
{
DataCache *This = impl_from_IViewObject2(iface);
HRESULT hres;
DataCacheEntry *cache_entry;
TRACE("(%p, %x, %d, %p, %p, %p, %p, %p, %p, %lx)\n",
iface,
dwDrawAspect,
lindex,
pvAspect,
hdcTargetDev,
hdcDraw,
lprcBounds,
lprcWBounds,
pfnContinue,
dwContinue);
if (lprcBounds==NULL)
return E_INVALIDARG;
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
/* FIXME: compare ptd too */
if ((cache_entry->fmtetc.dwAspect != dwDrawAspect) ||
(cache_entry->fmtetc.lindex != lindex))
continue;
/* if the data hasn't been loaded yet, do it now */
if ((cache_entry->stgmedium.tymed == TYMED_NULL) && cache_entry->stream)
{
hres = DataCacheEntry_LoadData(cache_entry);
if (FAILED(hres))
continue;
}
/* no data */
if (cache_entry->stgmedium.tymed == TYMED_NULL)
continue;
if (pfnContinue && !pfnContinue(dwContinue)) return E_ABORT;
switch (cache_entry->data_cf)
{
case CF_METAFILEPICT:
{
/*
* We have to be careful not to modify the state of the
* DC.
*/
INT prevMapMode;
SIZE oldWindowExt;
SIZE oldViewportExt;
POINT oldViewportOrg;
METAFILEPICT *mfpict;
if ((cache_entry->stgmedium.tymed != TYMED_MFPICT) ||
!((mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict))))
continue;
prevMapMode = SetMapMode(hdcDraw, mfpict->mm);
SetWindowExtEx(hdcDraw,
mfpict->xExt,
mfpict->yExt,
&oldWindowExt);
SetViewportExtEx(hdcDraw,
lprcBounds->right - lprcBounds->left,
lprcBounds->bottom - lprcBounds->top,
&oldViewportExt);
SetViewportOrgEx(hdcDraw,
lprcBounds->left,
lprcBounds->top,
&oldViewportOrg);
PlayMetaFile(hdcDraw, mfpict->hMF);
SetWindowExtEx(hdcDraw,
oldWindowExt.cx,
oldWindowExt.cy,
NULL);
SetViewportExtEx(hdcDraw,
oldViewportExt.cx,
oldViewportExt.cy,
NULL);
SetViewportOrgEx(hdcDraw,
oldViewportOrg.x,
oldViewportOrg.y,
NULL);
SetMapMode(hdcDraw, prevMapMode);
GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
return S_OK;
}
case CF_DIB:
{
BITMAPINFO *info;
BYTE *bits;
if ((cache_entry->stgmedium.tymed != TYMED_HGLOBAL) ||
!((info = GlobalLock( cache_entry->stgmedium.u.hGlobal ))))
continue;
bits = (BYTE *) info + bitmap_info_size( info, DIB_RGB_COLORS );
StretchDIBits( hdcDraw, lprcBounds->left, lprcBounds->top,
lprcBounds->right - lprcBounds->left, lprcBounds->bottom - lprcBounds->top,
0, 0, info->bmiHeader.biWidth, info->bmiHeader.biHeight,
bits, info, DIB_RGB_COLORS, SRCCOPY );
GlobalUnlock( cache_entry->stgmedium.u.hGlobal );
return S_OK;
}
}
}
WARN("no data could be found to be drawn\n");
return OLE_E_BLANK;
}
static HRESULT WINAPI DataCache_GetColorSet(
IViewObject2* iface,
DWORD dwDrawAspect,
LONG lindex,
void* pvAspect,
DVTARGETDEVICE* ptd,
HDC hicTargetDevice,
LOGPALETTE** ppColorSet)
{
FIXME("stub\n");
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_Freeze(
IViewObject2* iface,
DWORD dwDrawAspect,
LONG lindex,
void* pvAspect,
DWORD* pdwFreeze)
{
FIXME("stub\n");
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_Unfreeze(
IViewObject2* iface,
DWORD dwFreeze)
{
FIXME("stub\n");
return E_NOTIMPL;
}
/************************************************************************
* DataCache_SetAdvise (IViewObject2)
*
* This sets-up an advisory sink with the data cache. When the object's
* view changes, this sink is called.
*/
static HRESULT WINAPI DataCache_SetAdvise(
IViewObject2* iface,
DWORD aspects,
DWORD advf,
IAdviseSink* pAdvSink)
{
DataCache *this = impl_from_IViewObject2(iface);
TRACE("(%p, %x, %x, %p)\n", iface, aspects, advf, pAdvSink);
/*
* A call to this function removes the previous sink
*/
if (this->sinkInterface != NULL)
{
IAdviseSink_Release(this->sinkInterface);
this->sinkInterface = NULL;
this->sinkAspects = 0;
this->sinkAdviseFlag = 0;
}
/*
* Now, setup the new one.
*/
if (pAdvSink!=NULL)
{
this->sinkInterface = pAdvSink;
this->sinkAspects = aspects;
this->sinkAdviseFlag = advf;
IAdviseSink_AddRef(this->sinkInterface);
}
/*
* When the ADVF_PRIMEFIRST flag is set, we have to advise the
* sink immediately.
*/
if (advf & ADVF_PRIMEFIRST)
{
DataCache_FireOnViewChange(this, aspects, -1);
}
return S_OK;
}
/************************************************************************
* DataCache_GetAdvise (IViewObject2)
*
* This method queries the current state of the advise sink
* installed on the data cache.
*/
static HRESULT WINAPI DataCache_GetAdvise(
IViewObject2* iface,
DWORD* pAspects,
DWORD* pAdvf,
IAdviseSink** ppAdvSink)
{
DataCache *this = impl_from_IViewObject2(iface);
TRACE("(%p, %p, %p, %p)\n", iface, pAspects, pAdvf, ppAdvSink);
/*
* Just copy all the requested values.
*/
if (pAspects!=NULL)
*pAspects = this->sinkAspects;
if (pAdvf!=NULL)
*pAdvf = this->sinkAdviseFlag;
if (ppAdvSink!=NULL)
{
if (this->sinkInterface != NULL)
IAdviseSink_QueryInterface(this->sinkInterface,
&IID_IAdviseSink,
(void**)ppAdvSink);
else *ppAdvSink = NULL;
}
return S_OK;
}
/************************************************************************
* DataCache_GetExtent (IViewObject2)
*
* This method retrieves the "natural" size of this cached object.
*/
static HRESULT WINAPI DataCache_GetExtent(
IViewObject2* iface,
DWORD dwDrawAspect,
LONG lindex,
DVTARGETDEVICE* ptd,
LPSIZEL lpsizel)
{
DataCache *This = impl_from_IViewObject2(iface);
HRESULT hres = E_FAIL;
DataCacheEntry *cache_entry;
TRACE("(%p, %x, %d, %p, %p)\n",
iface, dwDrawAspect, lindex, ptd, lpsizel);
if (lpsizel==NULL)
return E_POINTER;
lpsizel->cx = 0;
lpsizel->cy = 0;
if (lindex!=-1)
FIXME("Unimplemented flag lindex = %d\n", lindex);
/*
* Right now, we support only the callback from
* the default handler.
*/
if (ptd!=NULL)
FIXME("Unimplemented ptd = %p\n", ptd);
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
/* FIXME: compare ptd too */
if ((cache_entry->fmtetc.dwAspect != dwDrawAspect) ||
(cache_entry->fmtetc.lindex != lindex))
continue;
/* if the data hasn't been loaded yet, do it now */
if ((cache_entry->stgmedium.tymed == TYMED_NULL) && cache_entry->stream)
{
hres = DataCacheEntry_LoadData(cache_entry);
if (FAILED(hres))
continue;
}
/* no data */
if (cache_entry->stgmedium.tymed == TYMED_NULL)
continue;
switch (cache_entry->data_cf)
{
case CF_METAFILEPICT:
{
METAFILEPICT *mfpict;
if ((cache_entry->stgmedium.tymed != TYMED_MFPICT) ||
!((mfpict = GlobalLock(cache_entry->stgmedium.u.hMetaFilePict))))
continue;
lpsizel->cx = mfpict->xExt;
lpsizel->cy = mfpict->yExt;
GlobalUnlock(cache_entry->stgmedium.u.hMetaFilePict);
return S_OK;
}
case CF_DIB:
{
BITMAPINFOHEADER *info;
LONG x_pels_m, y_pels_m;
if ((cache_entry->stgmedium.tymed != TYMED_HGLOBAL) ||
!((info = GlobalLock( cache_entry->stgmedium.u.hGlobal ))))
continue;
x_pels_m = info->biXPelsPerMeter;
y_pels_m = info->biYPelsPerMeter;
/* Size in units of 0.01mm (ie. MM_HIMETRIC) */
if (x_pels_m != 0 && y_pels_m != 0)
{
lpsizel->cx = info->biWidth * 100000 / x_pels_m;
lpsizel->cy = info->biHeight * 100000 / y_pels_m;
}
else
{
HDC hdc = GetDC( 0 );
lpsizel->cx = info->biWidth * 2540 / GetDeviceCaps( hdc, LOGPIXELSX );
lpsizel->cy = info->biHeight * 2540 / GetDeviceCaps( hdc, LOGPIXELSY );
ReleaseDC( 0, hdc );
}
GlobalUnlock( cache_entry->stgmedium.u.hGlobal );
return S_OK;
}
}
}
WARN("no data could be found to get the extents from\n");
/*
* This method returns OLE_E_BLANK when it fails.
*/
return OLE_E_BLANK;
}
/*********************************************************
* Method implementation for the IOleCache2
* part of the DataCache class.
*/
/************************************************************************
* DataCache_IOleCache2_QueryInterface (IUnknown)
*/
static HRESULT WINAPI DataCache_IOleCache2_QueryInterface(
IOleCache2* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IOleCache2(iface);
return IUnknown_QueryInterface(this->outer_unk, riid, ppvObject);
}
/************************************************************************
* DataCache_IOleCache2_AddRef (IUnknown)
*/
static ULONG WINAPI DataCache_IOleCache2_AddRef(
IOleCache2* iface)
{
DataCache *this = impl_from_IOleCache2(iface);
return IUnknown_AddRef(this->outer_unk);
}
/************************************************************************
* DataCache_IOleCache2_Release (IUnknown)
*/
static ULONG WINAPI DataCache_IOleCache2_Release(
IOleCache2* iface)
{
DataCache *this = impl_from_IOleCache2(iface);
return IUnknown_Release(this->outer_unk);
}
/*****************************************************************************
* setup_sink
*
* Set up the sink connection to the running object.
*/
static HRESULT setup_sink(DataCache *This, DataCacheEntry *cache_entry)
{
HRESULT hr = S_FALSE;
DWORD flags;
/* Clear the ADVFCACHE_* bits. Native also sets the two highest bits for some reason. */
flags = cache_entry->advise_flags & ~(ADVFCACHE_NOHANDLER | ADVFCACHE_FORCEBUILTIN | ADVFCACHE_ONSAVE);
if(This->running_object)
if(!(flags & ADVF_NODATA))
hr = IDataObject_DAdvise(This->running_object, &cache_entry->fmtetc, flags,
&This->IAdviseSink_iface, &cache_entry->sink_id);
return hr;
}
static HRESULT WINAPI DataCache_Cache(
IOleCache2* iface,
FORMATETC* pformatetc,
DWORD advf,
DWORD* pdwConnection)
{
DataCache *This = impl_from_IOleCache2(iface);
DataCacheEntry *cache_entry;
HRESULT hr;
TRACE("(%p, 0x%x, %p)\n", pformatetc, advf, pdwConnection);
if (!pformatetc || !pdwConnection)
return E_INVALIDARG;
TRACE("pformatetc = %s\n", debugstr_formatetc(pformatetc));
*pdwConnection = 0;
cache_entry = DataCache_GetEntryForFormatEtc(This, pformatetc);
if (cache_entry)
{
TRACE("found an existing cache entry\n");
*pdwConnection = cache_entry->id;
return CACHE_S_SAMECACHE;
}
hr = DataCache_CreateEntry(This, pformatetc, advf, &cache_entry, FALSE);
if (SUCCEEDED(hr))
{
*pdwConnection = cache_entry->id;
setup_sink(This, cache_entry);
}
return hr;
}
static HRESULT WINAPI DataCache_Uncache(
IOleCache2* iface,
DWORD dwConnection)
{
DataCache *This = impl_from_IOleCache2(iface);
DataCacheEntry *cache_entry;
TRACE("(%d)\n", dwConnection);
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
if (cache_entry->id == dwConnection)
{
DataCacheEntry_Destroy(This, cache_entry);
return S_OK;
}
WARN("no connection found for %d\n", dwConnection);
return OLE_E_NOCONNECTION;
}
static HRESULT WINAPI DataCache_EnumCache(
IOleCache2* iface,
IEnumSTATDATA** ppenumSTATDATA)
{
FIXME("stub\n");
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_InitCache(
IOleCache2* iface,
IDataObject* pDataObject)
{
FIXME("stub\n");
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_IOleCache2_SetData(
IOleCache2* iface,
FORMATETC* pformatetc,
STGMEDIUM* pmedium,
BOOL fRelease)
{
DataCache *This = impl_from_IOleCache2(iface);
DataCacheEntry *cache_entry;
HRESULT hr;
TRACE("(%p, %p, %s)\n", pformatetc, pmedium, fRelease ? "TRUE" : "FALSE");
TRACE("formatetc = %s\n", debugstr_formatetc(pformatetc));
cache_entry = DataCache_GetEntryForFormatEtc(This, pformatetc);
if (cache_entry)
{
hr = DataCacheEntry_SetData(cache_entry, pformatetc, pmedium, fRelease);
if (SUCCEEDED(hr))
DataCache_FireOnViewChange(This, cache_entry->fmtetc.dwAspect,
cache_entry->fmtetc.lindex);
return hr;
}
WARN("cache entry not found\n");
return OLE_E_BLANK;
}
static HRESULT WINAPI DataCache_UpdateCache(
IOleCache2* iface,
LPDATAOBJECT pDataObject,
DWORD grfUpdf,
LPVOID pReserved)
{
FIXME("(%p, 0x%x, %p): stub\n", pDataObject, grfUpdf, pReserved);
return E_NOTIMPL;
}
static HRESULT WINAPI DataCache_DiscardCache(
IOleCache2* iface,
DWORD dwDiscardOptions)
{
DataCache *This = impl_from_IOleCache2(iface);
DataCacheEntry *cache_entry;
HRESULT hr = S_OK;
TRACE("(%d)\n", dwDiscardOptions);
if (dwDiscardOptions == DISCARDCACHE_SAVEIFDIRTY)
hr = DataCache_Save(&This->IPersistStorage_iface, This->presentationStorage, TRUE);
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
hr = DataCacheEntry_DiscardData(cache_entry);
if (FAILED(hr))
break;
}
return hr;
}
/*********************************************************
* Method implementation for the IOleCacheControl
* part of the DataCache class.
*/
/************************************************************************
* DataCache_IOleCacheControl_QueryInterface (IUnknown)
*/
static HRESULT WINAPI DataCache_IOleCacheControl_QueryInterface(
IOleCacheControl* iface,
REFIID riid,
void** ppvObject)
{
DataCache *this = impl_from_IOleCacheControl(iface);
return IUnknown_QueryInterface(this->outer_unk, riid, ppvObject);
}
/************************************************************************
* DataCache_IOleCacheControl_AddRef (IUnknown)
*/
static ULONG WINAPI DataCache_IOleCacheControl_AddRef(
IOleCacheControl* iface)
{
DataCache *this = impl_from_IOleCacheControl(iface);
return IUnknown_AddRef(this->outer_unk);
}
/************************************************************************
* DataCache_IOleCacheControl_Release (IUnknown)
*/
static ULONG WINAPI DataCache_IOleCacheControl_Release(
IOleCacheControl* iface)
{
DataCache *this = impl_from_IOleCacheControl(iface);
return IUnknown_Release(this->outer_unk);
}
/************************************************************************
* DataCache_OnRun (IOleCacheControl)
*/
static HRESULT WINAPI DataCache_OnRun(IOleCacheControl* iface, IDataObject *data_obj)
{
DataCache *This = impl_from_IOleCacheControl(iface);
DataCacheEntry *cache_entry;
TRACE("(%p)->(%p)\n", iface, data_obj);
if(This->running_object) return S_OK;
/* No reference is taken on the data object */
This->running_object = data_obj;
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
setup_sink(This, cache_entry);
}
return S_OK;
}
/************************************************************************
* DataCache_OnStop (IOleCacheControl)
*/
static HRESULT WINAPI DataCache_OnStop(IOleCacheControl* iface)
{
DataCache *This = impl_from_IOleCacheControl(iface);
DataCacheEntry *cache_entry;
TRACE("(%p)\n", iface);
if(!This->running_object) return S_OK;
LIST_FOR_EACH_ENTRY(cache_entry, &This->cache_list, DataCacheEntry, entry)
{
if(cache_entry->sink_id)
{
IDataObject_DUnadvise(This->running_object, cache_entry->sink_id);
cache_entry->sink_id = 0;
}
}
/* No ref taken in OnRun, so no Release call here */
This->running_object = NULL;
return S_OK;
}
/************************************************************************
* IAdviseSink methods.
* This behaves as an internal object to the data cache. QI'ing its ptr doesn't
* give access to the cache's other interfaces. We don't maintain a ref count,
* the object exists as long as the cache is around.
*/
static HRESULT WINAPI DataCache_IAdviseSink_QueryInterface(IAdviseSink *iface, REFIID iid, void **obj)
{
*obj = NULL;
if (IsEqualIID(&IID_IUnknown, iid) ||
IsEqualIID(&IID_IAdviseSink, iid))
{
*obj = iface;
}
if(*obj)
{
IAdviseSink_AddRef(iface);
return S_OK;
}
return E_NOINTERFACE;
}
static ULONG WINAPI DataCache_IAdviseSink_AddRef(IAdviseSink *iface)
{
return 2;
}
static ULONG WINAPI DataCache_IAdviseSink_Release(IAdviseSink *iface)
{
return 1;
}
static void WINAPI DataCache_OnDataChange(IAdviseSink *iface, FORMATETC *fmt, STGMEDIUM *med)
{
DataCache *This = impl_from_IAdviseSink(iface);
TRACE("(%p)->(%s, %p)\n", This, debugstr_formatetc(fmt), med);
IOleCache2_SetData(&This->IOleCache2_iface, fmt, med, FALSE);
}
static void WINAPI DataCache_OnViewChange(IAdviseSink *iface, DWORD aspect, LONG index)
{
FIXME("stub\n");
}
static void WINAPI DataCache_OnRename(IAdviseSink *iface, IMoniker *mk)
{
FIXME("stub\n");
}
static void WINAPI DataCache_OnSave(IAdviseSink *iface)
{
FIXME("stub\n");
}
static void WINAPI DataCache_OnClose(IAdviseSink *iface)
{
FIXME("stub\n");
}
/*
* Virtual function tables for the DataCache class.
*/
static const IUnknownVtbl DataCache_NDIUnknown_VTable =
{
DataCache_NDIUnknown_QueryInterface,
DataCache_NDIUnknown_AddRef,
DataCache_NDIUnknown_Release
};
static const IDataObjectVtbl DataCache_IDataObject_VTable =
{
DataCache_IDataObject_QueryInterface,
DataCache_IDataObject_AddRef,
DataCache_IDataObject_Release,
DataCache_GetData,
DataCache_GetDataHere,
DataCache_QueryGetData,
DataCache_GetCanonicalFormatEtc,
DataCache_IDataObject_SetData,
DataCache_EnumFormatEtc,
DataCache_DAdvise,
DataCache_DUnadvise,
DataCache_EnumDAdvise
};
static const IPersistStorageVtbl DataCache_IPersistStorage_VTable =
{
DataCache_IPersistStorage_QueryInterface,
DataCache_IPersistStorage_AddRef,
DataCache_IPersistStorage_Release,
DataCache_GetClassID,
DataCache_IsDirty,
DataCache_InitNew,
DataCache_Load,
DataCache_Save,
DataCache_SaveCompleted,
DataCache_HandsOffStorage
};
static const IViewObject2Vtbl DataCache_IViewObject2_VTable =
{
DataCache_IViewObject2_QueryInterface,
DataCache_IViewObject2_AddRef,
DataCache_IViewObject2_Release,
DataCache_Draw,
DataCache_GetColorSet,
DataCache_Freeze,
DataCache_Unfreeze,
DataCache_SetAdvise,
DataCache_GetAdvise,
DataCache_GetExtent
};
static const IOleCache2Vtbl DataCache_IOleCache2_VTable =
{
DataCache_IOleCache2_QueryInterface,
DataCache_IOleCache2_AddRef,
DataCache_IOleCache2_Release,
DataCache_Cache,
DataCache_Uncache,
DataCache_EnumCache,
DataCache_InitCache,
DataCache_IOleCache2_SetData,
DataCache_UpdateCache,
DataCache_DiscardCache
};
static const IOleCacheControlVtbl DataCache_IOleCacheControl_VTable =
{
DataCache_IOleCacheControl_QueryInterface,
DataCache_IOleCacheControl_AddRef,
DataCache_IOleCacheControl_Release,
DataCache_OnRun,
DataCache_OnStop
};
static const IAdviseSinkVtbl DataCache_IAdviseSink_VTable =
{
DataCache_IAdviseSink_QueryInterface,
DataCache_IAdviseSink_AddRef,
DataCache_IAdviseSink_Release,
DataCache_OnDataChange,
DataCache_OnViewChange,
DataCache_OnRename,
DataCache_OnSave,
DataCache_OnClose
};
/*********************************************************
* Method implementation for DataCache class.
*/
static DataCache* DataCache_Construct(
REFCLSID clsid,
LPUNKNOWN pUnkOuter)
{
DataCache* newObject = 0;
/*
* Allocate space for the object.
*/
newObject = HeapAlloc(GetProcessHeap(), 0, sizeof(DataCache));
if (newObject==0)
return newObject;
/*
* Initialize the virtual function table.
*/
newObject->IDataObject_iface.lpVtbl = &DataCache_IDataObject_VTable;
newObject->IUnknown_inner.lpVtbl = &DataCache_NDIUnknown_VTable;
newObject->IPersistStorage_iface.lpVtbl = &DataCache_IPersistStorage_VTable;
newObject->IViewObject2_iface.lpVtbl = &DataCache_IViewObject2_VTable;
newObject->IOleCache2_iface.lpVtbl = &DataCache_IOleCache2_VTable;
newObject->IOleCacheControl_iface.lpVtbl = &DataCache_IOleCacheControl_VTable;
newObject->IAdviseSink_iface.lpVtbl = &DataCache_IAdviseSink_VTable;
newObject->outer_unk = pUnkOuter ? pUnkOuter : &newObject->IUnknown_inner;
newObject->ref = 1;
/*
* Initialize the other members of the structure.
*/
newObject->sinkAspects = 0;
newObject->sinkAdviseFlag = 0;
newObject->sinkInterface = 0;
newObject->presentationStorage = NULL;
list_init(&newObject->cache_list);
newObject->last_cache_id = 1;
newObject->dirty = FALSE;
newObject->running_object = NULL;
return newObject;
}
/******************************************************************************
* CreateDataCache [OLE32.@]
*
* Creates a data cache to allow an object to render one or more of its views,
* whether running or not.
*
* PARAMS
* pUnkOuter [I] Outer unknown for the object.
* rclsid [I]
* riid [I] IID of interface to return.
* ppvObj [O] Address where the data cache object will be stored on return.
*
* RETURNS
* Success: S_OK.
* Failure: HRESULT code.
*
* NOTES
* The following interfaces are supported by the returned data cache object:
* IOleCache, IOleCache2, IOleCacheControl, IPersistStorage, IDataObject,
* IViewObject and IViewObject2.
*/
HRESULT WINAPI CreateDataCache(
LPUNKNOWN pUnkOuter,
REFCLSID rclsid,
REFIID riid,
LPVOID* ppvObj)
{
DataCache* newCache = NULL;
HRESULT hr = S_OK;
TRACE("(%s, %p, %s, %p)\n", debugstr_guid(rclsid), pUnkOuter, debugstr_guid(riid), ppvObj);
/*
* Sanity check
*/
if (ppvObj==0)
return E_POINTER;
*ppvObj = 0;
/*
* If this cache is constructed for aggregation, make sure
* the caller is requesting the IUnknown interface.
* This is necessary because it's the only time the non-delegating
* IUnknown pointer can be returned to the outside.
*/
if ( pUnkOuter && !IsEqualIID(&IID_IUnknown, riid) )
return E_INVALIDARG;
/*
* Try to construct a new instance of the class.
*/
newCache = DataCache_Construct(rclsid,
pUnkOuter);
if (newCache == 0)
return E_OUTOFMEMORY;
hr = IUnknown_QueryInterface(&newCache->IUnknown_inner, riid, ppvObj);
IUnknown_Release(&newCache->IUnknown_inner);
return hr;
}
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