Stub some winspool functions.
[wine/gsoc_dplay.git] / server / clipboard.c
blob5a885a0febe63015f93cf79c08826aca668486b4
1 /*
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
21 #include "config.h"
22 #include "wine/port.h"
24 #include <assert.h>
25 #include <stdlib.h>
26 #include <stdio.h>
27 #include <string.h>
29 #include "request.h"
30 #include "object.h"
31 #include "user.h"
33 struct thread *cbthread; /* thread id that has clipboard open */
34 static user_handle_t clipboard; /* window that has clipboard open */
36 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)
50 clipboard = 0;
51 cbthread = NULL;
53 if (thread == cbowner)
55 owner = 0;
56 cbowner = NULL;
60 static int set_clipboard_window(user_handle_t win, int clear)
62 if (cbthread && cbthread != current)
64 set_error(STATUS_WAS_LOCKED);
65 return 0;
67 else if (!clear)
69 clipboard = win;
70 cbthread = current;
72 else
74 cbthread = NULL;
75 clipboard = 0;
77 return 1;
81 static int set_clipboard_owner(user_handle_t win, int clear)
83 if (cbthread == current)
85 if (!clear)
87 cbowner = current;
88 owner = win;
90 else
92 cbowner = 0;
93 owner = 0;
95 seqno++;
96 return 1;
98 else
100 set_error(STATUS_WAS_LOCKED);
101 return 0;
106 static int get_seqno(void)
108 time_t tm = time(NULL);
110 if (!cbowner && (tm > (seqnots + MINUPDATELAPSE)))
112 seqnots = tm;
113 seqno++;
115 return seqno;
119 DECL_HANDLER(set_clipboard_info)
121 reply->old_clipboard = clipboard;
122 reply->old_owner = owner;
123 reply->old_viewer = viewer;
125 if (req->flags & SET_CB_OPEN)
127 if (!set_clipboard_window(req->clipboard, 0))
128 return;
130 else if (req->flags & SET_CB_CLOSE)
132 if (!set_clipboard_window(0, 1))
133 return;
136 if (req->flags & SET_CB_OWNER)
138 if (!set_clipboard_owner(req->owner, 0))
139 return;
141 else if (req->flags & SET_CB_RELOWNER)
143 if (!set_clipboard_owner(0, 1))
144 return;
147 if (req->flags & SET_CB_VIEWER)
148 viewer = req->viewer;
150 if (req->flags & SET_CB_SEQNO)
151 seqno++;
153 reply->seqno = get_seqno();
155 if (cbthread == current)
156 reply->flags |= CB_OPEN;
158 if (cbowner == current)
159 reply->flags |= CB_OWNER;