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Sweden-Number/dlls/user32/clipboard.c

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/*
* WIN32 clipboard implementation
*
* Copyright 1994 Martin Ayotte
* 1996 Alex Korobka
* 1999 Noel Borthwick
* 2003 Ulrich Czekalla for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*
* NOTES:
* This file contains the implementation for the WIN32 Clipboard API
* and Wine's internal clipboard cache.
* The actual contents of the clipboard are held in the clipboard cache.
* The internal implementation talks to a "clipboard driver" to fill or
* expose the cache to the native device. (Currently only the X11 and
* TTY clipboard driver are available)
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <stdlib.h>
#include <sys/types.h>
#include <fcntl.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <string.h>
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "user_private.h"
#include "win.h"
#include "wine/debug.h"
#include "wine/unicode.h"
#include "wine/server.h"
WINE_DEFAULT_DEBUG_CHANNEL(clipboard);
#define CF_REGFORMATBASE 0xC000
typedef struct
{
HWND hWndOpen;
HWND hWndOwner;
HWND hWndViewer;
UINT seqno;
UINT flags;
} CLIPBOARDINFO, *LPCLIPBOARDINFO;
/*
* Indicates if data has changed since open.
*/
static BOOL bCBHasChanged = FALSE;
/**************************************************************************
* CLIPBOARD_SetClipboardOwner
*
* Set the global wineserver clipboard owner. The current process will
* be the owner and <hWnd> will get the render notifications.
*/
static BOOL CLIPBOARD_SetClipboardOwner(HWND hWnd)
{
BOOL bRet;
TRACE(" hWnd(%p)\n", hWnd);
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_OWNER;
req->owner = wine_server_user_handle( hWnd );
bRet = !wine_server_call_err( req );
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_GetClipboardInfo
*/
static BOOL CLIPBOARD_GetClipboardInfo(LPCLIPBOARDINFO cbInfo)
{
BOOL bRet;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (((bRet = !wine_server_call_err( req ))))
{
cbInfo->hWndOpen = wine_server_ptr_handle( reply->old_clipboard );
cbInfo->hWndOwner = wine_server_ptr_handle( reply->old_owner );
cbInfo->hWndViewer = wine_server_ptr_handle( reply->old_viewer );
cbInfo->seqno = reply->seqno;
cbInfo->flags = reply->flags;
}
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_ReleaseOwner
*/
BOOL CLIPBOARD_ReleaseOwner(void)
{
BOOL bRet = FALSE;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_RELOWNER | SET_CB_SEQNO;
if (wine_server_call_err( req ))
{
ERR("Failed to set clipboard.\n");
}
else
{
bRet = TRUE;
}
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_OpenClipboard
*/
static BOOL CLIPBOARD_OpenClipboard(HWND hWnd)
{
BOOL bRet;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_OPEN;
req->clipboard = wine_server_user_handle( hWnd );
bRet = !wine_server_call( req );
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_CloseClipboard
*/
static BOOL CLIPBOARD_CloseClipboard(void)
{
BOOL bRet;
TRACE(" Changed=%d\n", bCBHasChanged);
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_CLOSE;
if (bCBHasChanged) req->flags |= SET_CB_SEQNO;
bRet = !wine_server_call_err( req );
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_SetClipboardViewer
*/
static HWND CLIPBOARD_SetClipboardViewer( HWND hWnd )
{
HWND hwndPrev = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_VIEWER;
req->viewer = wine_server_user_handle( hWnd );
if (!wine_server_call_err( req ))
hwndPrev = wine_server_ptr_handle( reply->old_viewer );
}
SERVER_END_REQ;
return hwndPrev;
}
/**************************************************************************
* WIN32 Clipboard implementation
**************************************************************************/
/**************************************************************************
* RegisterClipboardFormatW (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatW(LPCWSTR FormatName)
{
return USER_Driver->pRegisterClipboardFormat(FormatName);
}
/**************************************************************************
* RegisterClipboardFormatA (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatA(LPCSTR formatName)
{
int len;
LPWSTR wFormat;
UINT ret;
len = MultiByteToWideChar(CP_ACP, 0, formatName, -1, NULL, 0);
wFormat = HeapAlloc(GetProcessHeap(), 0, len*sizeof(WCHAR));
MultiByteToWideChar(CP_ACP, 0, formatName, -1, wFormat, len);
ret = RegisterClipboardFormatW(wFormat);
HeapFree(GetProcessHeap(), 0, wFormat);
return ret;
}
/**************************************************************************
* GetClipboardFormatNameW (USER32.@)
*/
INT WINAPI GetClipboardFormatNameW(UINT wFormat, LPWSTR retStr, INT maxlen)
{
if (wFormat < MAXINTATOM) return 0;
return GlobalGetAtomNameW( wFormat, retStr, maxlen );
}
/**************************************************************************
* GetClipboardFormatNameA (USER32.@)
*/
INT WINAPI GetClipboardFormatNameA(UINT wFormat, LPSTR retStr, INT maxlen)
{
if (wFormat < MAXINTATOM) return 0;
return GlobalGetAtomNameA( wFormat, retStr, maxlen );
}
/**************************************************************************
* OpenClipboard (USER32.@)
*
* Note: Netscape uses NULL hWnd to open the clipboard.
*/
BOOL WINAPI OpenClipboard( HWND hWnd )
{
BOOL bRet;
TRACE("(%p)...\n", hWnd);
bRet = CLIPBOARD_OpenClipboard(hWnd);
TRACE(" returning %i\n", bRet);
return bRet;
}
/**************************************************************************
* CloseClipboard (USER32.@)
*/
BOOL WINAPI CloseClipboard(void)
{
BOOL bRet = FALSE;
TRACE("() Changed=%d\n", bCBHasChanged);
if (CLIPBOARD_CloseClipboard())
{
if (bCBHasChanged)
{
HWND hWndViewer = GetClipboardViewer();
USER_Driver->pEndClipboardUpdate();
bCBHasChanged = FALSE;
if (hWndViewer)
SendMessageW(hWndViewer, WM_DRAWCLIPBOARD, (WPARAM) GetClipboardOwner(), 0);
}
bRet = TRUE;
}
return bRet;
}
/**************************************************************************
* EmptyClipboard (USER32.@)
* Empties and acquires ownership of the clipboard
*/
BOOL WINAPI EmptyClipboard(void)
{
CLIPBOARDINFO cbinfo;
TRACE("()\n");
if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
~cbinfo.flags & CB_OPEN)
{
WARN("Clipboard not opened by calling task!\n");
SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
return FALSE;
}
/* Destroy private objects */
if (cbinfo.hWndOwner)
SendMessageW(cbinfo.hWndOwner, WM_DESTROYCLIPBOARD, 0, 0);
/* Tell the driver to acquire the selection. The current owner
* will be signaled to delete it's own cache. */
/* Assign ownership of the clipboard to the current client. We do
* this before acquiring the selection so that when we do acquire the
* selection and the selection loser gets notified, it can check if
* it has lost the Wine clipboard ownership. If it did then it knows
* that a WM_DESTORYCLIPBOARD has already been sent. Otherwise it
* lost the selection to a X app and it should send the
* WM_DESTROYCLIPBOARD itself. */
CLIPBOARD_SetClipboardOwner(cbinfo.hWndOpen);
/* Acquire the selection. This will notify the previous owner
* to clear it's cache. */
USER_Driver->pAcquireClipboard(cbinfo.hWndOpen);
/* Empty the local cache */
USER_Driver->pEmptyClipboard(FALSE);
bCBHasChanged = TRUE;
return TRUE;
}
/**************************************************************************
* GetClipboardOwner (USER32.@)
* FIXME: Can't return the owner if the clipboard is owned by an external X-app
*/
HWND WINAPI GetClipboardOwner(void)
{
HWND hWndOwner = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (!wine_server_call_err( req )) hWndOwner = wine_server_ptr_handle( reply->old_owner );
}
SERVER_END_REQ;
TRACE(" hWndOwner(%p)\n", hWndOwner);
return hWndOwner;
}
/**************************************************************************
* GetOpenClipboardWindow (USER32.@)
*/
HWND WINAPI GetOpenClipboardWindow(void)
{
HWND hWndOpen = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (!wine_server_call_err( req )) hWndOpen = wine_server_ptr_handle( reply->old_clipboard );
}
SERVER_END_REQ;
TRACE(" hWndClipWindow(%p)\n", hWndOpen);
return hWndOpen;
}
/**************************************************************************
* SetClipboardViewer (USER32.@)
*/
HWND WINAPI SetClipboardViewer( HWND hWnd )
{
HWND hwndPrev = CLIPBOARD_SetClipboardViewer(hWnd);
if (hWnd)
SendMessageW(hWnd, WM_DRAWCLIPBOARD, (WPARAM) GetClipboardOwner(), 0);
TRACE("(%p): returning %p\n", hWnd, hwndPrev);
return hwndPrev;
}
/**************************************************************************
* GetClipboardViewer (USER32.@)
*/
HWND WINAPI GetClipboardViewer(void)
{
HWND hWndViewer = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (!wine_server_call_err( req )) hWndViewer = wine_server_ptr_handle( reply->old_viewer );
}
SERVER_END_REQ;
TRACE(" hWndViewer=%p\n", hWndViewer);
return hWndViewer;
}
/**************************************************************************
* ChangeClipboardChain (USER32.@)
*/
BOOL WINAPI ChangeClipboardChain(HWND hWnd, HWND hWndNext)
{
BOOL bRet = TRUE;
HWND hWndViewer = GetClipboardViewer();
if (hWndViewer)
{
if (WIN_GetFullHandle(hWnd) == hWndViewer)
CLIPBOARD_SetClipboardViewer(WIN_GetFullHandle(hWndNext));
else
bRet = !SendMessageW(hWndViewer, WM_CHANGECBCHAIN, (WPARAM)hWnd, (LPARAM)hWndNext);
}
else
ERR("hWndViewer is lost\n");
return bRet;
}
/**************************************************************************
* SetClipboardData (USER32.@)
*/
HANDLE WINAPI SetClipboardData(UINT wFormat, HANDLE hData)
{
CLIPBOARDINFO cbinfo;
HANDLE hResult = 0;
TRACE("(%04X, %p) !\n", wFormat, hData);
/* If it's not owned, data can only be set if the format isn't
available and its rendering is not delayed */
if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
(!(cbinfo.flags & CB_OWNER) && !hData))
{
WARN("Clipboard not owned by calling task. Operation failed.\n");
return 0;
}
if (USER_Driver->pSetClipboardData(wFormat, hData, cbinfo.flags & CB_OWNER))
{
hResult = hData;
bCBHasChanged = TRUE;
}
return hResult;
}
/**************************************************************************
* CountClipboardFormats (USER32.@)
*/
INT WINAPI CountClipboardFormats(void)
{
INT count = USER_Driver->pCountClipboardFormats();
TRACE("returning %d\n", count);
return count;
}
/**************************************************************************
* EnumClipboardFormats (USER32.@)
*/
UINT WINAPI EnumClipboardFormats(UINT wFormat)
{
CLIPBOARDINFO cbinfo;
TRACE("(%04X)\n", wFormat);
if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
(~cbinfo.flags & CB_OPEN))
{
WARN("Clipboard not opened by calling task.\n");
SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
return 0;
}
return USER_Driver->pEnumClipboardFormats(wFormat);
}
/**************************************************************************
* IsClipboardFormatAvailable (USER32.@)
*/
BOOL WINAPI IsClipboardFormatAvailable(UINT wFormat)
{
BOOL bret = USER_Driver->pIsClipboardFormatAvailable(wFormat);
TRACE("%04x, returning %d\n", wFormat, bret);
return bret;
}
/**************************************************************************
* GetClipboardData (USER32.@)
*/
HANDLE WINAPI GetClipboardData(UINT wFormat)
{
HANDLE hData = 0;
CLIPBOARDINFO cbinfo;
TRACE("%04x\n", wFormat);
if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
(~cbinfo.flags & CB_OPEN))
{
WARN("Clipboard not opened by calling task.\n");
SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
return 0;
}
hData = USER_Driver->pGetClipboardData( wFormat );
TRACE("returning %p\n", hData);
return hData;
}
/**************************************************************************
* GetPriorityClipboardFormat (USER32.@)
*/
INT WINAPI GetPriorityClipboardFormat(UINT *list, INT nCount)
{
int i;
TRACE("()\n");
if(CountClipboardFormats() == 0)
return 0;
for (i = 0; i < nCount; i++)
if (IsClipboardFormatAvailable(list[i]))
return list[i];
return -1;
}
/**************************************************************************
* GetClipboardSequenceNumber (USER32.@)
* Supported on Win2k/Win98
* MSDN: Windows clipboard code keeps a serial number for the clipboard
* for each window station. The number is incremented whenever the
* contents change or are emptied.
* If you do not have WINSTA_ACCESSCLIPBOARD then the function returns 0
*/
DWORD WINAPI GetClipboardSequenceNumber(VOID)
{
DWORD seqno = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (!wine_server_call_err( req )) seqno = reply->seqno;
}
SERVER_END_REQ;
TRACE("returning %x\n", seqno);
return seqno;
}
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