2 * Server-side clipboard management
4 * Copyright (C) 2002 Ulrich Czekalla
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "wine/port.h"
33 static struct thread *cbthread; /* thread id that has clipboard open */
34 static user_handle_t clipboard; /* window that has clipboard open */
36 static struct thread *cbowner; /* thread id that owns the clipboard */
37 static user_handle_t owner; /* window that owns the clipboard data */
39 static user_handle_t viewer; /* first window in clipboard viewer list */
40 static unsigned int seqno; /* clipboard change sequence number */
41 static time_t seqnots; /* time stamp of last seqno increment */
43 #define MINUPDATELAPSE 2
45 /* Called when thread terminates to allow release of clipboard */
46 void cleanup_clipboard_thread(struct thread *thread)
48 if (thread == cbthread)
53 if (thread == cbowner)
60 static int set_clipboard_window(user_handle_t win, int clear)
62 if (cbthread && cbthread != current)
64 set_error(STATUS_WAS_LOCKED);
81 static int set_clipboard_owner(user_handle_t win, int clear)
83 if (cbthread && cbthread != current)
85 set_error(STATUS_WAS_LOCKED);
102 static int get_seqno(void)
104 time_t tm = time(NULL);
106 if (!cbowner && (tm > (seqnots + MINUPDATELAPSE)))
115 DECL_HANDLER(set_clipboard_info)
117 reply->old_clipboard = clipboard;
118 reply->old_owner = owner;
119 reply->old_viewer = viewer;
121 if (req->flags & SET_CB_OPEN)
125 /* clipboard already opened */
126 set_error(STATUS_WAS_LOCKED);
130 if (!set_clipboard_window(req->clipboard, 0))
133 else if (req->flags & SET_CB_CLOSE)
135 if (cbthread != current)
137 set_win32_error(ERROR_CLIPBOARD_NOT_OPEN);
141 if (!set_clipboard_window(0, 1))
145 if (req->flags & SET_CB_OWNER)
147 if (!set_clipboard_owner(req->owner, 0))
150 else if (req->flags & SET_CB_RELOWNER)
152 if (!set_clipboard_owner(0, 1))
156 if (req->flags & SET_CB_VIEWER)
157 viewer = req->viewer;
159 if (req->flags & SET_CB_SEQNO)
162 reply->seqno = get_seqno();
164 if (cbthread == current)
165 reply->flags |= CB_OPEN;
167 if (cbowner == current)
168 reply->flags |= CB_OWNER;