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Sweden-Number/windows/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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 "wine/winuser16.h"
#include "wine/winbase16.h"
#include "heap.h"
#include "user.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
*/
BOOL CLIPBOARD_SetClipboardOwner(HWND hWnd)
{
BOOL bRet = FALSE;
TRACE(" hWnd(%p)\n", hWnd);
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_OWNER;
req->owner = WIN_GetFullHandle( hWnd );
if (wine_server_call_err( req ))
{
ERR("Failed to set clipboard.\n");
}
else
{
bRet = TRUE;
}
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_GetClipboardInfo
*/
static BOOL CLIPBOARD_GetClipboardInfo(LPCLIPBOARDINFO cbInfo)
{
BOOL bRet = FALSE;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = 0;
if (wine_server_call_err( req ))
{
ERR("Failed to get clipboard owner.\n");
}
else
{
cbInfo->hWndOpen = reply->old_clipboard;
cbInfo->hWndOwner = reply->old_owner;
cbInfo->hWndViewer = reply->old_viewer;
cbInfo->seqno = reply->seqno;
cbInfo->flags = reply->flags;
bRet = TRUE;
}
}
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 = FALSE;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_OPEN;
req->clipboard = WIN_GetFullHandle( hWnd );
if (wine_server_call_err( req ))
{
ERR("Failed to set clipboard.\n");
}
else
{
bRet = TRUE;
}
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* CLIPBOARD_CloseClipboard
*/
static BOOL CLIPBOARD_CloseClipboard(void)
{
BOOL bRet = FALSE;
TRACE(" Changed=%d\n", bCBHasChanged);
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_CLOSE;
if (bCBHasChanged)
{
req->flags |= SET_CB_SEQNO;
TRACE("Clipboard data changed\n");
}
if (wine_server_call_err( req ))
{
ERR("Failed to set clipboard.\n");
}
else
{
bRet = TRUE;
}
}
SERVER_END_REQ;
return bRet;
}
/**************************************************************************
* WIN32 Clipboard implementation
**************************************************************************/
/**************************************************************************
* RegisterClipboardFormatA (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatA(LPCSTR FormatName)
{
UINT wFormatID = 0;
TRACE("%s\n", debugstr_a(FormatName));
if (USER_Driver.pRegisterClipboardFormat)
wFormatID = USER_Driver.pRegisterClipboardFormat(FormatName);
return wFormatID;
}
/**************************************************************************
* RegisterClipboardFormat (USER.145)
*/
UINT16 WINAPI RegisterClipboardFormat16(LPCSTR FormatName)
{
UINT wFormatID = 0;
TRACE("%s\n", debugstr_a(FormatName));
if (USER_Driver.pRegisterClipboardFormat)
wFormatID = USER_Driver.pRegisterClipboardFormat(FormatName);
return wFormatID;
}
/**************************************************************************
* RegisterClipboardFormatW (USER32.@)
*/
UINT WINAPI RegisterClipboardFormatW(LPCWSTR formatName)
{
LPSTR aFormat = HEAP_strdupWtoA( GetProcessHeap(), 0, formatName );
UINT ret = RegisterClipboardFormatA( aFormat );
HeapFree( GetProcessHeap(), 0, aFormat );
return ret;
}
/**************************************************************************
* GetClipboardFormatName (USER.146)
*/
INT16 WINAPI GetClipboardFormatName16(UINT16 wFormat, LPSTR retStr, INT16 maxlen)
{
TRACE("%04x,%p,%d\n", wFormat, retStr, maxlen);
return GetClipboardFormatNameA(wFormat, retStr, maxlen);
}
/**************************************************************************
* GetClipboardFormatNameA (USER32.@)
*/
INT WINAPI GetClipboardFormatNameA(UINT wFormat, LPSTR retStr, INT maxlen)
{
INT len = 0;
TRACE("%04x,%p,%d\n", wFormat, retStr, maxlen);
if (USER_Driver.pGetClipboardFormatName)
len = USER_Driver.pGetClipboardFormatName(wFormat, retStr, maxlen);
return len;
}
/**************************************************************************
* GetClipboardFormatNameW (USER32.@)
*/
INT WINAPI GetClipboardFormatNameW(UINT wFormat, LPWSTR retStr, INT maxlen)
{
INT ret;
LPSTR p = HeapAlloc( GetProcessHeap(), 0, maxlen );
if(p == NULL) return 0; /* FIXME: is this the correct failure value? */
ret = GetClipboardFormatNameA( wFormat, p, maxlen );
if (maxlen > 0 && !MultiByteToWideChar( CP_ACP, 0, p, -1, retStr, maxlen ))
retStr[maxlen-1] = 0;
HeapFree( GetProcessHeap(), 0, p );
return ret;
}
/**************************************************************************
* 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 (USER.138)
*/
BOOL16 WINAPI CloseClipboard16(void)
{
return CloseClipboard();
}
/**************************************************************************
* CloseClipboard (USER32.@)
*/
BOOL WINAPI CloseClipboard(void)
{
BOOL bRet = FALSE;
TRACE("(%d)\n", bCBHasChanged);
if (CLIPBOARD_CloseClipboard())
{
if (bCBHasChanged)
{
HWND hWndViewer = GetClipboardViewer();
if (USER_Driver.pEndClipboardUpdate)
USER_Driver.pEndClipboardUpdate();
if (hWndViewer)
SendMessageW(hWndViewer, WM_DRAWCLIPBOARD, 0, 0);
bCBHasChanged = FALSE;
}
bRet = TRUE;
}
return bRet;
}
/**************************************************************************
* EmptyClipboard (USER.139)
*/
BOOL16 WINAPI EmptyClipboard16(void)
{
return EmptyClipboard();
}
/**************************************************************************
* 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. */
if (~cbinfo.flags & CB_OWNER)
{
/* 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. */
if (USER_Driver.pAcquireClipboard)
USER_Driver.pAcquireClipboard(cbinfo.hWndOpen);
}
/* Empty the local cache */
if (USER_Driver.pEmptyClipboard)
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 = 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 = reply->old_clipboard;
}
SERVER_END_REQ;
TRACE(" hWndClipWindow(%p)\n", hWndOpen);
return hWndOpen;
}
/**************************************************************************
* SetClipboardViewer (USER32.@)
*/
HWND WINAPI SetClipboardViewer( HWND hWnd )
{
HWND hwndPrev = 0;
SERVER_START_REQ( set_clipboard_info )
{
req->flags = SET_CB_VIEWER;
req->viewer = WIN_GetFullHandle(hWnd);
if (wine_server_call_err( req ))
{
ERR("Failed to set clipboard.\n");
}
else
{
hwndPrev = reply->old_viewer;
}
}
SERVER_END_REQ;
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 = 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)
SetClipboardViewer(WIN_GetFullHandle(hWndNext));
else
bRet = !SendMessageW(hWndViewer, WM_CHANGECBCHAIN, (WPARAM)hWnd, (LPARAM)hWndNext);
}
else
ERR("hWndViewer is lost\n");
return bRet;
}
/**************************************************************************
* SetClipboardData (USER.141)
*/
HANDLE16 WINAPI SetClipboardData16(UINT16 wFormat, HANDLE16 hData)
{
CLIPBOARDINFO cbinfo;
HANDLE16 hResult = 0;
TRACE("(%04X, %04x) !\n", wFormat, hData);
/* If it's not owned, data can only be set if the format doesn't exists
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 &&
USER_Driver.pSetClipboardData(wFormat, hData, 0, cbinfo.flags & CB_OWNER))
{
hResult = hData;
bCBHasChanged = TRUE;
}
return hResult;
}
/**************************************************************************
* 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 &&
USER_Driver.pSetClipboardData(wFormat, 0, hData, cbinfo.flags & CB_OWNER))
{
hResult = hData;
bCBHasChanged = TRUE;
}
return hResult;
}
/**************************************************************************
* CountClipboardFormats (USER.143)
*/
INT16 WINAPI CountClipboardFormats16(void)
{
return CountClipboardFormats();
}
/**************************************************************************
* CountClipboardFormats (USER32.@)
*/
INT WINAPI CountClipboardFormats(void)
{
INT count = 0;
if (USER_Driver.pCountClipboardFormats)
count = USER_Driver.pCountClipboardFormats();
TRACE("returning %d\n", count);
return count;
}
/**************************************************************************
* EnumClipboardFormats (USER.144)
*/
UINT16 WINAPI EnumClipboardFormats16(UINT16 wFormat)
{
return EnumClipboardFormats(wFormat);
}
/**************************************************************************
* EnumClipboardFormats (USER32.@)
*/
UINT WINAPI EnumClipboardFormats(UINT wFormat)
{
UINT wFmt = 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;
}
if (USER_Driver.pEnumClipboardFormats)
wFmt = USER_Driver.pEnumClipboardFormats(wFormat);
return wFmt;
}
/**************************************************************************
* IsClipboardFormatAvailable (USER.193)
*/
BOOL16 WINAPI IsClipboardFormatAvailable16(UINT16 wFormat)
{
return IsClipboardFormatAvailable(wFormat);
}
/**************************************************************************
* IsClipboardFormatAvailable (USER32.@)
*/
BOOL WINAPI IsClipboardFormatAvailable(UINT wFormat)
{
BOOL bret = FALSE;
if (USER_Driver.pIsClipboardFormatAvailable)
bret = USER_Driver.pIsClipboardFormatAvailable(wFormat);
TRACE("%04x, returning %d\n", wFormat, bret);
return bret;
}
/**************************************************************************
* GetClipboardData (USER.142)
*/
HANDLE16 WINAPI GetClipboardData16(UINT16 wFormat)
{
HANDLE16 hData = 0;
CLIPBOARDINFO cbinfo;
if (!CLIPBOARD_GetClipboardInfo(&cbinfo) ||
(~cbinfo.flags & CB_OPEN))
{
WARN("Clipboard not opened by calling task.\n");
SetLastError(ERROR_CLIPBOARD_NOT_OPEN);
return 0;
}
if (USER_Driver.pGetClipboardData)
USER_Driver.pGetClipboardData(wFormat, &hData, NULL);
return hData;
}
/**************************************************************************
* 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;
}
if (USER_Driver.pGetClipboardData)
USER_Driver.pGetClipboardData(wFormat, NULL, &hData);
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 %lx\n", seqno);
return seqno;
}
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