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Sweden-Number/dlls/user32/clipboard.c

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/*
* WIN32 clipboard implementation
*
* Copyright 1994 Martin Ayotte
* Copyright 1996 Alex Korobka
* Copyright 1999 Noel Borthwick
* Copyright 2003 Ulrich Czekalla for CodeWeavers
* Copyright 2016 Alexandre Julliard
*
* 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
*
*/
#include <assert.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winnls.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "user_private.h"
#include "win.h"
#include "wine/list.h"
#include "wine/server.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(clipboard);
struct cached_format
{
struct list entry; /* entry in cache list */
UINT format; /* format id */
UINT seqno; /* sequence number when the data was set */
HANDLE handle; /* original data handle */
};
static struct list cached_formats = LIST_INIT( cached_formats );
static struct list formats_to_free = LIST_INIT( formats_to_free );
static CRITICAL_SECTION clipboard_cs;
static CRITICAL_SECTION_DEBUG critsect_debug =
{
0, 0, &clipboard_cs,
{ &critsect_debug.ProcessLocksList, &critsect_debug.ProcessLocksList },
0, 0, { (DWORD_PTR)(__FILE__ ": clipboard_cs") }
};
static CRITICAL_SECTION clipboard_cs = { &critsect_debug, -1, 0, 0, 0, 0 };
/* platform-independent version of METAFILEPICT */
struct metafile_pict
{
LONG mm;
LONG xExt;
LONG yExt;
BYTE bits[1];
};
/* get a debug string for a format id */
static const char *debugstr_format( UINT id )
{
WCHAR buffer[256];
DWORD le = GetLastError();
BOOL r = NtUserGetClipboardFormatName( id, buffer, 256 );
SetLastError(le);
if (r)
return wine_dbg_sprintf( "%04x %s", id, debugstr_w(buffer) );
switch (id)
{
#define BUILTIN(id) case id: return #id;
BUILTIN(CF_TEXT)
BUILTIN(CF_BITMAP)
BUILTIN(CF_METAFILEPICT)
BUILTIN(CF_SYLK)
BUILTIN(CF_DIF)
BUILTIN(CF_TIFF)
BUILTIN(CF_OEMTEXT)
BUILTIN(CF_DIB)
BUILTIN(CF_PALETTE)
BUILTIN(CF_PENDATA)
BUILTIN(CF_RIFF)
BUILTIN(CF_WAVE)
BUILTIN(CF_UNICODETEXT)
BUILTIN(CF_ENHMETAFILE)
BUILTIN(CF_HDROP)
BUILTIN(CF_LOCALE)
BUILTIN(CF_DIBV5)
BUILTIN(CF_OWNERDISPLAY)
BUILTIN(CF_DSPTEXT)
BUILTIN(CF_DSPBITMAP)
BUILTIN(CF_DSPMETAFILEPICT)
BUILTIN(CF_DSPENHMETAFILE)
#undef BUILTIN
default: return wine_dbg_sprintf( "%04x", id );
}
}
/* build the data to send to the server in SetClipboardData */
static HANDLE marshal_data( UINT format, HANDLE handle, data_size_t *ret_size )
{
SIZE_T size;
switch (format)
{
case CF_BITMAP:
case CF_DSPBITMAP:
{
BITMAP bitmap, *bm;
if (!GetObjectW( handle, sizeof(bitmap), &bitmap )) return 0;
size = abs( bitmap.bmHeight ) * ((((bitmap.bmWidth * bitmap.bmBitsPixel) + 15) >> 3) & ~1);
*ret_size = sizeof(bitmap) + size;
if (!(bm = GlobalAlloc( GMEM_FIXED, *ret_size ))) return 0;
*bm = bitmap;
GetBitmapBits( handle, size, bm + 1 );
return bm;
}
case CF_PALETTE:
{
LOGPALETTE *pal;
if (!(size = GetPaletteEntries( handle, 0, 0, NULL ))) return 0;
*ret_size = offsetof( LOGPALETTE, palPalEntry[size] );
if (!(pal = GlobalAlloc( GMEM_FIXED, *ret_size ))) return 0;
pal->palVersion = 0x300;
pal->palNumEntries = size;
GetPaletteEntries( handle, 0, size, pal->palPalEntry );
return pal;
}
case CF_ENHMETAFILE:
case CF_DSPENHMETAFILE:
{
BYTE *ret;
if (!(size = GetEnhMetaFileBits( handle, 0, NULL ))) return 0;
if (!(ret = GlobalAlloc( GMEM_FIXED, size ))) return 0;
GetEnhMetaFileBits( handle, size, ret );
*ret_size = size;
return ret;
}
case CF_METAFILEPICT:
case CF_DSPMETAFILEPICT:
{
METAFILEPICT *mf;
struct metafile_pict *mfbits;
if (!(mf = GlobalLock( handle ))) return 0;
if (!(size = GetMetaFileBitsEx( mf->hMF, 0, NULL )))
{
GlobalUnlock( handle );
return 0;
}
*ret_size = offsetof( struct metafile_pict, bits[size] );
if (!(mfbits = GlobalAlloc( GMEM_FIXED, *ret_size )))
{
GlobalUnlock( handle );
return 0;
}
mfbits->mm = mf->mm;
mfbits->xExt = mf->xExt;
mfbits->yExt = mf->yExt;
GetMetaFileBitsEx( mf->hMF, size, mfbits->bits );
GlobalUnlock( handle );
return mfbits;
}
case CF_UNICODETEXT:
{
WCHAR *ptr;
if (!(size = GlobalSize( handle ))) return 0;
if ((data_size_t)size != size) return 0;
if (!(ptr = GlobalLock( handle ))) return 0;
ptr[(size + 1) / sizeof(WCHAR) - 1] = 0; /* enforce null-termination */
GlobalUnlock( handle );
*ret_size = size;
return handle;
}
case CF_TEXT:
case CF_OEMTEXT:
{
char *ptr;
if (!(size = GlobalSize( handle ))) return 0;
if ((data_size_t)size != size) return 0;
if (!(ptr = GlobalLock( handle ))) return 0;
ptr[size - 1] = 0; /* enforce null-termination */
GlobalUnlock( handle );
*ret_size = size;
return handle;
}
default:
if (!(size = GlobalSize( handle ))) return 0;
if ((data_size_t)size != size) return 0;
*ret_size = size;
return handle;
}
}
/* rebuild the target handle from the data received in GetClipboardData */
static HANDLE unmarshal_data( UINT format, void *data, data_size_t size )
{
HANDLE handle = GlobalReAlloc( data, size, 0 ); /* release unused space */
switch (format)
{
case CF_BITMAP:
{
BITMAP *bm = handle;
if (size < sizeof(*bm)) break;
if (size < bm->bmWidthBytes * abs( bm->bmHeight )) break;
if (bm->bmBits) break; /* DIB sections are not supported across processes */
bm->bmBits = bm + 1;
return CreateBitmapIndirect( bm );
}
case CF_DSPBITMAP: /* not supported across processes */
break;
case CF_PALETTE:
{
LOGPALETTE *pal = handle;
if (size < sizeof(*pal)) break;
if (size < offsetof( LOGPALETTE, palPalEntry[pal->palNumEntries] )) break;
return CreatePalette( pal );
}
case CF_ENHMETAFILE:
case CF_DSPENHMETAFILE:
return SetEnhMetaFileBits( size, handle );
case CF_METAFILEPICT:
case CF_DSPMETAFILEPICT:
{
METAFILEPICT mf;
struct metafile_pict *mfbits = handle;
if (size <= sizeof(*mfbits)) break;
mf.mm = mfbits->mm;
mf.xExt = mfbits->xExt;
mf.yExt = mfbits->yExt;
mf.hMF = SetMetaFileBitsEx( size - offsetof( struct metafile_pict, bits ), mfbits->bits );
*(METAFILEPICT *)handle = mf;
return handle;
}
}
return handle;
}
/* retrieve a data format from the cache */
static struct cached_format *get_cached_format( UINT format )
{
struct cached_format *cache;
LIST_FOR_EACH_ENTRY( cache, &cached_formats, struct cached_format, entry )
if (cache->format == format) return cache;
return NULL;
}
/* store data in the cache, or reuse the existing one if available */
static HANDLE cache_data( UINT format, HANDLE data, data_size_t size, UINT seqno,
struct cached_format *cache )
{
if (cache)
{
if (seqno == cache->seqno) /* we can reuse the cached data */
{
GlobalFree( data );
return cache->handle;
}
/* cache entry is stale, remove it */
list_remove( &cache->entry );
list_add_tail( &formats_to_free, &cache->entry );
}
/* allocate new cache entry */
if (!(cache = HeapAlloc( GetProcessHeap(), 0, sizeof(*cache) )))
{
GlobalFree( data );
return 0;
}
cache->format = format;
cache->seqno = seqno;
cache->handle = unmarshal_data( format, data, size );
list_add_tail( &cached_formats, &cache->entry );
return cache->handle;
}
/* free a single cached format */
static void free_cached_data( struct cached_format *cache )
{
void *ptr;
switch (cache->format)
{
case CF_BITMAP:
case CF_DSPBITMAP:
case CF_PALETTE:
DeleteObject( cache->handle );
break;
case CF_ENHMETAFILE:
case CF_DSPENHMETAFILE:
DeleteEnhMetaFile( cache->handle );
break;
case CF_METAFILEPICT:
case CF_DSPMETAFILEPICT:
if ((ptr = GlobalLock( cache->handle )))
{
DeleteMetaFile( ((METAFILEPICT *)ptr)->hMF );
GlobalUnlock( cache->handle );
}
GlobalFree( cache->handle );
break;
default:
GlobalFree( cache->handle );
break;
}
list_remove( &cache->entry );
HeapFree( GetProcessHeap(), 0, cache );
}
/* clear global memory formats; special types are freed on EmptyClipboard */
static void invalidate_memory_formats(void)
{
struct cached_format *cache, *next;
LIST_FOR_EACH_ENTRY_SAFE( cache, next, &cached_formats, struct cached_format, entry )
{
switch (cache->format)
{
case CF_BITMAP:
case CF_DSPBITMAP:
case CF_PALETTE:
case CF_ENHMETAFILE:
case CF_DSPENHMETAFILE:
case CF_METAFILEPICT:
case CF_DSPMETAFILEPICT:
continue;
default:
free_cached_data( cache );
break;
}
}
}
/* free all the data in the cache */
static void free_cached_formats(void)
{
struct list *ptr;
list_move_tail( &formats_to_free, &cached_formats );
while ((ptr = list_head( &formats_to_free )))
free_cached_data( LIST_ENTRY( ptr, struct cached_format, entry ));
}
/* get the clipboard locale stored in the CF_LOCALE format */
static LCID get_clipboard_locale(void)
{
HANDLE data;
LCID lcid = GetUserDefaultLCID();
if ((data = GetClipboardData( CF_LOCALE )))
{
LCID *ptr = GlobalLock( data );
if (ptr)
{
if (GlobalSize( data ) >= sizeof(*ptr)) lcid = *ptr;
GlobalUnlock( data );
}
}
return lcid;
}
/* get the codepage to use for text conversions in the specified format (CF_TEXT or CF_OEMTEXT) */
static UINT get_format_codepage( LCID lcid, UINT format )
{
LCTYPE type = (format == CF_TEXT) ? LOCALE_IDEFAULTANSICODEPAGE : LOCALE_IDEFAULTCODEPAGE;
UINT ret;
if (!GetLocaleInfoW( lcid, type | LOCALE_RETURN_NUMBER, (LPWSTR)&ret, sizeof(ret)/sizeof(WCHAR) ))
ret = (format == CF_TEXT) ? CP_ACP : CP_OEMCP;
return ret;
}
/* render synthesized ANSI text based on the contents of the 'from' format */
static HANDLE render_synthesized_textA( HANDLE data, UINT format, UINT from )
{
void *src;
WCHAR *srcW = NULL;
HANDLE ret = 0;
LCID lcid = get_clipboard_locale();
UINT codepage = get_format_codepage( lcid, format );
UINT len, size = GlobalSize( data );
if (!(src = GlobalLock( data ))) return 0;
if (from != CF_UNICODETEXT) /* first convert incoming format to Unicode */
{
UINT from_codepage = get_format_codepage( lcid, from );
len = MultiByteToWideChar( from_codepage, 0, src, size, NULL, 0 );
if (!(srcW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) ))) goto done;
MultiByteToWideChar( from_codepage, 0, src, size, srcW, len );
src = srcW;
size = len * sizeof(WCHAR);
}
if ((len = WideCharToMultiByte( codepage, 0, src, size / sizeof(WCHAR), NULL, 0, NULL, NULL )))
{
if ((ret = GlobalAlloc( GMEM_FIXED, len )))
WideCharToMultiByte( codepage, 0, src, size / sizeof(WCHAR), ret, len, NULL, NULL );
}
done:
HeapFree( GetProcessHeap(), 0, srcW );
GlobalUnlock( data );
return ret;
}
/* render synthesized Unicode text based on the contents of the 'from' format */
static HANDLE render_synthesized_textW( HANDLE data, UINT from )
{
char *src;
HANDLE ret = 0;
UINT len, size = GlobalSize( data );
UINT codepage = get_format_codepage( get_clipboard_locale(), from );
if (!(src = GlobalLock( data ))) return 0;
if ((len = MultiByteToWideChar( codepage, 0, src, size, NULL, 0 )))
{
if ((ret = GlobalAlloc( GMEM_FIXED, len * sizeof(WCHAR) )))
MultiByteToWideChar( codepage, 0, src, size, ret, len );
}
GlobalUnlock( data );
return ret;
}
/* render a synthesized bitmap based on the DIB clipboard data */
static HANDLE render_synthesized_bitmap( HANDLE data, UINT from )
{
BITMAPINFO *bmi;
HANDLE ret = 0;
HDC hdc = GetDC( 0 );
if ((bmi = GlobalLock( data )))
{
/* FIXME: validate data size */
ret = CreateDIBitmap( hdc, &bmi->bmiHeader, CBM_INIT,
(char *)bmi + bitmap_info_size( bmi, DIB_RGB_COLORS ),
bmi, DIB_RGB_COLORS );
GlobalUnlock( data );
}
NtUserReleaseDC( 0, hdc );
return ret;
}
/* render a synthesized DIB based on the clipboard data */
static HANDLE render_synthesized_dib( HANDLE data, UINT format, UINT from )
{
BITMAPINFO *bmi, *src;
DWORD src_size, header_size, bits_size;
HANDLE ret = 0;
HDC hdc = GetDC( 0 );
if (from == CF_BITMAP)
{
BITMAPV5HEADER header;
memset( &header, 0, sizeof(header) );
header.bV5Size = (format == CF_DIBV5) ? sizeof(BITMAPV5HEADER) : sizeof(BITMAPINFOHEADER);
if (!GetDIBits( hdc, data, 0, 0, NULL, (BITMAPINFO *)&header, DIB_RGB_COLORS )) goto done;
header_size = bitmap_info_size( (BITMAPINFO *)&header, DIB_RGB_COLORS );
if (!(ret = GlobalAlloc( GMEM_FIXED, header_size + header.bV5SizeImage ))) goto done;
bmi = (BITMAPINFO *)ret;
memset( bmi, 0, header_size );
memcpy( bmi, &header, header.bV5Size );
GetDIBits( hdc, data, 0, abs(header.bV5Height), (char *)bmi + header_size, bmi, DIB_RGB_COLORS );
}
else
{
SIZE_T size = GlobalSize( data );
if (size < sizeof(*bmi)) goto done;
if (!(src = GlobalLock( data ))) goto done;
src_size = bitmap_info_size( src, DIB_RGB_COLORS );
if (size <= src_size)
{
GlobalUnlock( data );
goto done;
}
bits_size = size - src_size;
header_size = (format == CF_DIBV5) ? sizeof(BITMAPV5HEADER) :
offsetof( BITMAPINFO, bmiColors[src->bmiHeader.biCompression == BI_BITFIELDS ? 3 : 0] );
if ((ret = GlobalAlloc( GMEM_FIXED, header_size + bits_size )))
{
bmi = (BITMAPINFO *)ret;
memset( bmi, 0, header_size );
memcpy( bmi, src, min( header_size, src_size ));
bmi->bmiHeader.biSize = header_size;
/* FIXME: convert colors according to DIBv5 color profile */
memcpy( (char *)bmi + header_size, (char *)src + src_size, bits_size );
}
GlobalUnlock( data );
}
done:
NtUserReleaseDC( 0, hdc );
return ret;
}
/* render a synthesized metafile based on the enhmetafile clipboard data */
static HANDLE render_synthesized_metafile( HANDLE data )
{
HANDLE ret = 0;
UINT size;
void *bits;
METAFILEPICT *pict;
ENHMETAHEADER header;
HDC hdc = GetDC( 0 );
size = GetWinMetaFileBits( data, 0, NULL, MM_ISOTROPIC, hdc );
if ((bits = HeapAlloc( GetProcessHeap(), 0, size )))
{
if (GetEnhMetaFileHeader( data, sizeof(header), &header ) &&
GetWinMetaFileBits( data, size, bits, MM_ISOTROPIC, hdc ))
{
if ((ret = GlobalAlloc( GMEM_FIXED, sizeof(*pict) )))
{
pict = (METAFILEPICT *)ret;
pict->mm = MM_ISOTROPIC;
pict->xExt = header.rclFrame.right - header.rclFrame.left;
pict->yExt = header.rclFrame.bottom - header.rclFrame.top;
pict->hMF = SetMetaFileBitsEx( size, bits );
}
}
HeapFree( GetProcessHeap(), 0, bits );
}
NtUserReleaseDC( 0, hdc );
return ret;
}
/* render a synthesized enhmetafile based on the metafile clipboard data */
static HANDLE render_synthesized_enhmetafile( HANDLE data )
{
METAFILEPICT *pict;
HANDLE ret = 0;
UINT size;
void *bits;
if (!(pict = GlobalLock( data ))) return 0;
size = GetMetaFileBitsEx( pict->hMF, 0, NULL );
if ((bits = HeapAlloc( GetProcessHeap(), 0, size )))
{
GetMetaFileBitsEx( pict->hMF, size, bits );
ret = SetWinMetaFileBits( size, bits, NULL, pict );
HeapFree( GetProcessHeap(), 0, bits );
}
GlobalUnlock( data );
return ret;
}
/* render a synthesized format */
static HANDLE render_synthesized_format( UINT format, UINT from )
{
HANDLE data = GetClipboardData( from );
if (!data) return 0;
TRACE( "rendering %s from %s\n", debugstr_format( format ), debugstr_format( from ));
switch (format)
{
case CF_TEXT:
case CF_OEMTEXT:
data = render_synthesized_textA( data, format, from );
break;
case CF_UNICODETEXT:
data = render_synthesized_textW( data, from );
break;
case CF_BITMAP:
data = render_synthesized_bitmap( data, from );
break;
case CF_DIB:
case CF_DIBV5:
data = render_synthesized_dib( data, format, from );
break;
case CF_METAFILEPICT:
data = render_synthesized_metafile( data );
break;
case CF_ENHMETAFILE:
data = render_synthesized_enhmetafile( data );
break;
default:
assert( 0 );
}
if (data)
{
TRACE( "adding %s %p\n", debugstr_format( format ), data );
SetClipboardData( format, data );
}
return data;
}
/**************************************************************************
* RegisterClipboardFormatW (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatW( LPCWSTR name )
{
return GlobalAddAtomW( name );
}
/**************************************************************************
* RegisterClipboardFormatA (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatA( LPCSTR name )
{
return GlobalAddAtomA( name );
}
/**************************************************************************
* GetClipboardFormatNameA (USER32.@)
*/
INT WINAPI GetClipboardFormatNameA( UINT format, LPSTR buffer, INT maxlen )
{
if (format < MAXINTATOM || format > 0xffff) return 0;
return GlobalGetAtomNameA( format, buffer, maxlen );
}
/**************************************************************************
* OpenClipboard (USER32.@)
*/
BOOL WINAPI OpenClipboard( HWND hwnd )
{
BOOL ret;
HWND owner;
TRACE( "%p\n", hwnd );
NtUserCallNoParam( NtUserUpdateClipboard );
EnterCriticalSection( &clipboard_cs );
SERVER_START_REQ( open_clipboard )
{
req->window = wine_server_user_handle( hwnd );
ret = !wine_server_call_err( req );
owner = wine_server_ptr_handle( reply->owner );
}
SERVER_END_REQ;
if (ret && !WIN_IsCurrentProcess( owner )) invalidate_memory_formats();
LeaveCriticalSection( &clipboard_cs );
return ret;
}
/**************************************************************************
* EmptyClipboard (USER32.@)
* Empties and acquires ownership of the clipboard
*/
BOOL WINAPI EmptyClipboard(void)
{
BOOL ret;
HWND owner = NtUserGetClipboardOwner();
TRACE( "owner %p\n", owner );
if (owner) SendMessageTimeoutW( owner, WM_DESTROYCLIPBOARD, 0, 0, SMTO_ABORTIFHUNG, 5000, NULL );
EnterCriticalSection( &clipboard_cs );
SERVER_START_REQ( empty_clipboard )
{
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
if (ret) free_cached_formats();
LeaveCriticalSection( &clipboard_cs );
return ret;
}
/**************************************************************************
* SetClipboardViewer (USER32.@)
*/
HWND WINAPI SetClipboardViewer( HWND hwnd )
{
HWND prev = 0, owner = 0;
SERVER_START_REQ( set_clipboard_viewer )
{
req->viewer = wine_server_user_handle( hwnd );
if (!wine_server_call_err( req ))
{
prev = wine_server_ptr_handle( reply->old_viewer );
owner = wine_server_ptr_handle( reply->owner );
}
}
SERVER_END_REQ;
if (hwnd) SendNotifyMessageW( hwnd, WM_DRAWCLIPBOARD, (WPARAM)owner, 0 );
TRACE( "%p returning %p\n", hwnd, prev );
return prev;
}
/**************************************************************************
* ChangeClipboardChain (USER32.@)
*/
BOOL WINAPI ChangeClipboardChain( HWND hwnd, HWND next )
{
NTSTATUS status;
HWND viewer;
if (!hwnd) return FALSE;
SERVER_START_REQ( set_clipboard_viewer )
{
req->viewer = wine_server_user_handle( next );
req->previous = wine_server_user_handle( hwnd );
status = wine_server_call( req );
viewer = wine_server_ptr_handle( reply->old_viewer );
}
SERVER_END_REQ;
if (status == STATUS_PENDING)
return !SendMessageW( viewer, WM_CHANGECBCHAIN, (WPARAM)hwnd, (LPARAM)next );
if (status) SetLastError( RtlNtStatusToDosError( status ));
return !status;
}
/**************************************************************************
* SetClipboardData (USER32.@)
*/
HANDLE WINAPI SetClipboardData( UINT format, HANDLE data )
{
struct cached_format *cache = NULL;
void *ptr = NULL;
data_size_t size = 0;
HANDLE handle = data, retval = 0;
NTSTATUS status = STATUS_SUCCESS;
TRACE( "%s %p\n", debugstr_format( format ), data );
if (data)
{
if (!(handle = marshal_data( format, data, &size ))) return 0;
if (!(ptr = GlobalLock( handle ))) goto done;
if (!(cache = HeapAlloc( GetProcessHeap(), 0, sizeof(*cache) ))) goto done;
cache->format = format;
cache->handle = data;
}
EnterCriticalSection( &clipboard_cs );
SERVER_START_REQ( set_clipboard_data )
{
req->format = format;
req->lcid = GetUserDefaultLCID();
wine_server_add_data( req, ptr, size );
if (!(status = wine_server_call( req )))
{
if (cache) cache->seqno = reply->seqno;
}
}
SERVER_END_REQ;
if (!status)
{
/* free the previous entry if any */
struct cached_format *prev;
if ((prev = get_cached_format( format ))) free_cached_data( prev );
if (cache) list_add_tail( &cached_formats, &cache->entry );
retval = data;
}
else HeapFree( GetProcessHeap(), 0, cache );
LeaveCriticalSection( &clipboard_cs );
done:
if (ptr) GlobalUnlock( handle );
if (handle != data) GlobalFree( handle );
if (status) SetLastError( RtlNtStatusToDosError( status ));
return retval;
}
/**************************************************************************
* EnumClipboardFormats (USER32.@)
*/
UINT WINAPI EnumClipboardFormats( UINT format )
{
UINT ret = 0;
SERVER_START_REQ( enum_clipboard_formats )
{
req->previous = format;
if (!wine_server_call_err( req ))
{
ret = reply->format;
SetLastError( ERROR_SUCCESS );
}
}
SERVER_END_REQ;
TRACE( "%s -> %s\n", debugstr_format( format ), debugstr_format( ret ));
return ret;
}
/**************************************************************************
* GetClipboardData (USER32.@)
*/
HANDLE WINAPI GetClipboardData( UINT format )
{
struct cached_format *cache;
NTSTATUS status;
UINT from, data_seqno;
HWND owner;
HANDLE data;
UINT size = 1024;
BOOL render = TRUE;
for (;;)
{
if (!(data = GlobalAlloc( GMEM_FIXED, size ))) return 0;
EnterCriticalSection( &clipboard_cs );
cache = get_cached_format( format );
SERVER_START_REQ( get_clipboard_data )
{
req->format = format;
req->render = render;
if (cache)
{
req->cached = 1;
req->seqno = cache->seqno;
}
wine_server_set_reply( req, data, size );
status = wine_server_call( req );
from = reply->from;
size = reply->total;
data_seqno = reply->seqno;
owner = wine_server_ptr_handle( reply->owner );
}
SERVER_END_REQ;
if (!status && size)
{
data = cache_data( format, data, size, data_seqno, cache );
LeaveCriticalSection( &clipboard_cs );
TRACE( "%s returning %p\n", debugstr_format( format ), data );
return data;
}
LeaveCriticalSection( &clipboard_cs );
GlobalFree( data );
if (status == STATUS_BUFFER_OVERFLOW) continue; /* retry with the new size */
if (status == STATUS_OBJECT_NAME_NOT_FOUND) return 0; /* no such format */
if (status)
{
SetLastError( RtlNtStatusToDosError( status ));
TRACE( "%s error %08x\n", debugstr_format( format ), status );
return 0;
}
if (render) /* try rendering it */
{
render = FALSE;
if (from)
{
render_synthesized_format( format, from );
continue;
}
else if (owner)
{
TRACE( "%s sending WM_RENDERFORMAT to %p\n", debugstr_format( format ), owner );
SendMessageW( owner, WM_RENDERFORMAT, format, 0 );
continue;
}
}
TRACE( "%s returning 0\n", debugstr_format( format ));
return 0;
}
}
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