170 lines
3.8 KiB
C
170 lines
3.8 KiB
C
/*
|
|
* Server-side clipboard management
|
|
*
|
|
* Copyright (C) 2002 Ulrich Czekalla
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#include "config.h"
|
|
#include "wine/port.h"
|
|
|
|
#include <assert.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
|
|
#include "request.h"
|
|
#include "object.h"
|
|
#include "user.h"
|
|
|
|
static struct thread *cbthread; /* thread id that has clipboard open */
|
|
static user_handle_t clipboard; /* window that has clipboard open */
|
|
|
|
static struct thread *cbowner; /* thread id that owns the clipboard */
|
|
static user_handle_t owner; /* window that owns the clipboard data */
|
|
|
|
static user_handle_t viewer; /* first window in clipboard viewer list */
|
|
static unsigned int seqno; /* clipboard change sequence number */
|
|
static time_t seqnots; /* time stamp of last seqno increment */
|
|
|
|
#define MINUPDATELAPSE 2
|
|
|
|
/* Called when thread terminates to allow release of clipboard */
|
|
void cleanup_clipboard_thread(struct thread *thread)
|
|
{
|
|
if (thread == cbthread)
|
|
{
|
|
clipboard = 0;
|
|
cbthread = NULL;
|
|
}
|
|
if (thread == cbowner)
|
|
{
|
|
owner = 0;
|
|
cbowner = NULL;
|
|
}
|
|
}
|
|
|
|
static int set_clipboard_window(user_handle_t win, int clear)
|
|
{
|
|
if (cbthread && cbthread != current)
|
|
{
|
|
set_error(STATUS_WAS_LOCKED);
|
|
return 0;
|
|
}
|
|
else if (!clear)
|
|
{
|
|
clipboard = win;
|
|
cbthread = current;
|
|
}
|
|
else
|
|
{
|
|
cbthread = NULL;
|
|
clipboard = 0;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int set_clipboard_owner(user_handle_t win, int clear)
|
|
{
|
|
if (cbowner && cbowner != current)
|
|
{
|
|
set_error(STATUS_WAS_LOCKED);
|
|
return 0;
|
|
}
|
|
else if (!clear)
|
|
{
|
|
owner = win;
|
|
cbowner = current;
|
|
}
|
|
else
|
|
{
|
|
owner = 0;
|
|
cbowner = NULL;
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
|
|
static int get_seqno(void)
|
|
{
|
|
time_t tm = time(NULL);
|
|
|
|
if (!cbowner && (tm > (seqnots + MINUPDATELAPSE)))
|
|
{
|
|
seqnots = tm;
|
|
seqno++;
|
|
}
|
|
return seqno;
|
|
}
|
|
|
|
|
|
DECL_HANDLER(set_clipboard_info)
|
|
{
|
|
reply->old_clipboard = clipboard;
|
|
reply->old_owner = owner;
|
|
reply->old_viewer = viewer;
|
|
|
|
if (req->flags & SET_CB_OPEN)
|
|
{
|
|
if (cbthread)
|
|
{
|
|
/* clipboard already opened */
|
|
set_error(STATUS_WAS_LOCKED);
|
|
return;
|
|
}
|
|
|
|
if (!set_clipboard_window(req->clipboard, 0))
|
|
return;
|
|
}
|
|
else if (req->flags & SET_CB_CLOSE)
|
|
{
|
|
if (cbthread != current)
|
|
{
|
|
set_win32_error(ERROR_CLIPBOARD_NOT_OPEN);
|
|
return;
|
|
}
|
|
|
|
if (!set_clipboard_window(0, 1))
|
|
return;
|
|
}
|
|
|
|
if (req->flags & SET_CB_OWNER)
|
|
{
|
|
if (!set_clipboard_owner(req->owner, 0))
|
|
return;
|
|
}
|
|
else if (req->flags & SET_CB_RELOWNER)
|
|
{
|
|
if (!set_clipboard_owner(0, 1))
|
|
return;
|
|
}
|
|
|
|
if (req->flags & SET_CB_VIEWER)
|
|
viewer = req->viewer;
|
|
|
|
if (req->flags & SET_CB_SEQNO)
|
|
seqno++;
|
|
|
|
reply->seqno = get_seqno();
|
|
|
|
if (cbthread == current)
|
|
reply->flags |= CB_OPEN;
|
|
|
|
if (cbowner == current)
|
|
reply->flags |= CB_OWNER;
|
|
}
|