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"
30 #define WIN32_NO_STATUS
39 struct object obj; /* object header */
40 struct thread *open_thread; /* thread id that has clipboard open */
41 user_handle_t open_win; /* window that has clipboard open */
42 struct thread *owner_thread; /* thread id that owns the clipboard */
43 user_handle_t owner_win; /* window that owns the clipboard data */
44 user_handle_t viewer; /* first window in clipboard viewer list */
45 unsigned int seqno; /* clipboard change sequence number */
46 time_t seqno_timestamp; /* time stamp of last seqno increment */
49 static void clipboard_dump( struct object *obj, int verbose );
51 static const struct object_ops clipboard_ops =
53 sizeof(struct clipboard), /* size */
54 clipboard_dump, /* dump */
55 no_add_queue, /* add_queue */
56 NULL, /* remove_queue */
59 no_signal, /* signal */
60 no_get_fd, /* get_fd */
61 no_map_access, /* map_access */
62 no_lookup_name, /* lookup_name */
63 no_close_handle, /* close_handle */
64 no_destroy /* destroy */
68 #define MINUPDATELAPSE 2
70 /* dump a clipboard object */
71 static void clipboard_dump( struct object *obj, int verbose )
73 struct clipboard *clipboard = (struct clipboard *)obj;
75 fprintf( stderr, "Clipboard open_thread=%p open_win=%p owner_thread=%p owner_win=%p viewer=%p seq=%u\n",
76 clipboard->open_thread, clipboard->open_win, clipboard->owner_thread,
77 clipboard->owner_win, clipboard->viewer, clipboard->seqno );
80 /* retrieve the clipboard info for the current process, allocating it if needed */
81 static struct clipboard *get_process_clipboard(void)
83 struct clipboard *clipboard;
84 struct winstation *winstation = get_process_winstation( current->process, WINSTA_ACCESSCLIPBOARD );
86 if (!winstation) return NULL;
88 if (!(clipboard = winstation->clipboard))
90 if ((clipboard = alloc_object( &clipboard_ops )))
92 clipboard->open_thread = NULL;
93 clipboard->open_win = 0;
94 clipboard->owner_thread = NULL;
95 clipboard->owner_win = 0;
96 clipboard->viewer = 0;
98 clipboard->seqno_timestamp = 0;
99 winstation->clipboard = clipboard;
102 release_object( winstation );
107 /* Called when thread terminates to allow release of clipboard */
108 void cleanup_clipboard_thread(struct thread *thread)
110 struct clipboard *clipboard;
111 struct winstation *winstation = get_process_winstation( thread->process, WINSTA_ACCESSCLIPBOARD );
113 if (!winstation) return;
115 if ((clipboard = winstation->clipboard))
117 if (thread == clipboard->open_thread)
119 clipboard->open_win = 0;
120 clipboard->open_thread = NULL;
122 if (thread == clipboard->owner_thread)
124 clipboard->owner_win = 0;
125 clipboard->owner_thread = NULL;
128 release_object( winstation );
131 static int set_clipboard_window( struct clipboard *clipboard, user_handle_t win, int clear )
133 if (clipboard->open_thread && clipboard->open_thread != current)
135 set_error(STATUS_WAS_LOCKED);
140 clipboard->open_win = win;
141 clipboard->open_thread = current;
145 clipboard->open_thread = NULL;
146 clipboard->open_win = 0;
152 static int set_clipboard_owner( struct clipboard *clipboard, user_handle_t win, int clear )
154 if (clipboard->open_thread && clipboard->open_thread->process != current->process)
156 set_error(STATUS_WAS_LOCKED);
161 clipboard->owner_win = win;
162 clipboard->owner_thread = current;
166 clipboard->owner_win = 0;
167 clipboard->owner_thread = NULL;
173 static int get_seqno( struct clipboard *clipboard )
175 time_t tm = time(NULL);
177 if (!clipboard->owner_thread && (tm > (clipboard->seqno_timestamp + MINUPDATELAPSE)))
179 clipboard->seqno_timestamp = tm;
182 return clipboard->seqno;
186 DECL_HANDLER(set_clipboard_info)
188 struct clipboard *clipboard = get_process_clipboard();
190 if (!clipboard) return;
192 reply->old_clipboard = clipboard->open_win;
193 reply->old_owner = clipboard->owner_win;
194 reply->old_viewer = clipboard->viewer;
196 if (req->flags & SET_CB_OPEN)
198 if (clipboard->open_thread)
200 /* clipboard already opened */
201 set_error(STATUS_WAS_LOCKED);
205 if (!set_clipboard_window( clipboard, req->clipboard, 0 )) return;
207 else if (req->flags & SET_CB_CLOSE)
209 if (clipboard->open_thread != current)
211 set_win32_error(ERROR_CLIPBOARD_NOT_OPEN);
215 if (!set_clipboard_window( clipboard, 0, 1 )) return;
218 if (req->flags & SET_CB_OWNER)
220 if (!set_clipboard_owner( clipboard, req->owner, 0 )) return;
222 else if (req->flags & SET_CB_RELOWNER)
224 if (!set_clipboard_owner( clipboard, 0, 1 )) return;
227 if (req->flags & SET_CB_VIEWER) clipboard->viewer = req->viewer;
229 if (req->flags & SET_CB_SEQNO) clipboard->seqno++;
231 reply->seqno = get_seqno( clipboard );
233 if (clipboard->open_thread == current) reply->flags |= CB_OPEN;
234 if (clipboard->owner_thread == current) reply->flags |= CB_OWNER;
235 if (clipboard->owner_thread && clipboard->owner_thread->process == current->process)
236 reply->flags |= CB_PROCESS;