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/*
* 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "request.h"
#include "object.h"
#include "user.h"
#include "winuser.h"
#include "winternl.h"
struct clipboard
{
struct object obj; /* object header */
struct thread *open_thread; /* thread id that has clipboard open */
user_handle_t open_win; /* window that has clipboard open */
struct thread *owner_thread; /* thread id that owns the clipboard */
user_handle_t owner_win; /* window that owns the clipboard data */
user_handle_t viewer; /* first window in clipboard viewer list */
unsigned int seqno; /* clipboard change sequence number */
time_t seqno_timestamp; /* time stamp of last seqno increment */
};
static void clipboard_dump( struct object *obj, int verbose );
static const struct object_ops clipboard_ops =
{
sizeof(struct clipboard), /* size */
clipboard_dump, /* dump */
no_get_type, /* get_type */
no_add_queue, /* add_queue */
NULL, /* remove_queue */
NULL, /* signaled */
NULL, /* satisfied */
no_signal, /* signal */
no_get_fd, /* get_fd */
no_map_access, /* map_access */
default_get_sd, /* get_sd */
default_set_sd, /* set_sd */
no_lookup_name, /* lookup_name */
no_open_file, /* open_file */
no_close_handle, /* close_handle */
no_destroy /* destroy */
};
#define MINUPDATELAPSE 2
/* dump a clipboard object */
static void clipboard_dump( struct object *obj, int verbose )
{
struct clipboard *clipboard = (struct clipboard *)obj;
fprintf( stderr, "Clipboard open_thread=%p open_win=%p owner_thread=%p owner_win=%p viewer=%p seq=%u\n",
clipboard->open_thread, clipboard->open_win, clipboard->owner_thread,
clipboard->owner_win, clipboard->viewer, clipboard->seqno );
}
/* retrieve the clipboard info for the current process, allocating it if needed */
static struct clipboard *get_process_clipboard(void)
{
struct clipboard *clipboard;
struct winstation *winstation = get_process_winstation( current->process, WINSTA_ACCESSCLIPBOARD );
if (!winstation) return NULL;
if (!(clipboard = winstation->clipboard))
{
if ((clipboard = alloc_object( &clipboard_ops )))
{
clipboard->open_thread = NULL;
clipboard->open_win = 0;
clipboard->owner_thread = NULL;
clipboard->owner_win = 0;
clipboard->viewer = 0;
clipboard->seqno = 0;
clipboard->seqno_timestamp = 0;
winstation->clipboard = clipboard;
}
}
release_object( winstation );
return clipboard;
}
/* Called when thread terminates to allow release of clipboard */
void cleanup_clipboard_thread(struct thread *thread)
{
struct clipboard *clipboard;
struct winstation *winstation = get_process_winstation( thread->process, WINSTA_ACCESSCLIPBOARD );
if (!winstation) return;
if ((clipboard = winstation->clipboard))
{
if (thread == clipboard->open_thread)
{
clipboard->open_win = 0;
clipboard->open_thread = NULL;
}
if (thread == clipboard->owner_thread)
{
clipboard->owner_win = 0;
clipboard->owner_thread = NULL;
}
}
release_object( winstation );
}
static int set_clipboard_window( struct clipboard *clipboard, user_handle_t win, int clear )
{
if (clipboard->open_thread && clipboard->open_thread != current)
{
set_error(STATUS_WAS_LOCKED);
return 0;
}
else if (!clear)
{
clipboard->open_win = win;
clipboard->open_thread = current;
}
else
{
clipboard->open_thread = NULL;
clipboard->open_win = 0;
}
return 1;
}
static int set_clipboard_owner( struct clipboard *clipboard, user_handle_t win, int clear )
{
if (clipboard->open_thread && clipboard->open_thread->process != current->process)
{
set_error(STATUS_WAS_LOCKED);
return 0;
}
else if (!clear)
{
clipboard->owner_win = win;
clipboard->owner_thread = current;
}
else
{
clipboard->owner_win = 0;
clipboard->owner_thread = NULL;
}
return 1;
}
static int get_seqno( struct clipboard *clipboard )
{
time_t tm = time(NULL);
if (!clipboard->owner_thread && (tm > (clipboard->seqno_timestamp + MINUPDATELAPSE)))
{
clipboard->seqno_timestamp = tm;
clipboard->seqno++;
}
return clipboard->seqno;
}
DECL_HANDLER(set_clipboard_info)
{
struct clipboard *clipboard = get_process_clipboard();
if (!clipboard) return;
reply->old_clipboard = clipboard->open_win;
reply->old_owner = clipboard->owner_win;
reply->old_viewer = clipboard->viewer;
if (req->flags & SET_CB_OPEN)
{
if (clipboard->open_thread)
{
/* clipboard already opened */
set_error(STATUS_WAS_LOCKED);
return;
}
if (!set_clipboard_window( clipboard, req->clipboard, 0 )) return;
}
else if (req->flags & SET_CB_CLOSE)
{
if (clipboard->open_thread != current)
{
set_win32_error(ERROR_CLIPBOARD_NOT_OPEN);
return;
}
if (!set_clipboard_window( clipboard, 0, 1 )) return;
}
if (req->flags & SET_CB_OWNER)
{
if (!set_clipboard_owner( clipboard, req->owner, 0 )) return;
}
else if (req->flags & SET_CB_RELOWNER)
{
if (!set_clipboard_owner( clipboard, 0, 1 )) return;
}
if (req->flags & SET_CB_VIEWER) clipboard->viewer = req->viewer;
if (req->flags & SET_CB_SEQNO) clipboard->seqno++;
reply->seqno = get_seqno( clipboard );
if (clipboard->open_thread == current) reply->flags |= CB_OPEN;
if (clipboard->owner_thread == current) reply->flags |= CB_OWNER;
if (clipboard->owner_thread && clipboard->owner_thread->process == current->process)
reply->flags |= CB_PROCESS;
}
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