241 lines
7.3 KiB
C
241 lines
7.3 KiB
C
/*
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* Server-side clipboard management
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*
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* Copyright (C) 2002 Ulrich Czekalla
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <assert.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "request.h"
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#include "object.h"
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#include "file.h"
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#include "process.h"
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#include "user.h"
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#include "winuser.h"
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#include "winternl.h"
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struct clipboard
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{
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struct object obj; /* object header */
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struct thread *open_thread; /* thread id that has clipboard open */
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user_handle_t open_win; /* window that has clipboard open */
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struct thread *owner_thread; /* thread id that owns the clipboard */
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user_handle_t owner_win; /* window that owns the clipboard data */
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user_handle_t viewer; /* first window in clipboard viewer list */
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unsigned int seqno; /* clipboard change sequence number */
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timeout_t seqno_timestamp; /* time stamp of last seqno increment */
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};
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static void clipboard_dump( struct object *obj, int verbose );
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static const struct object_ops clipboard_ops =
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{
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sizeof(struct clipboard), /* size */
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clipboard_dump, /* dump */
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no_get_type, /* get_type */
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no_add_queue, /* add_queue */
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NULL, /* remove_queue */
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NULL, /* signaled */
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NULL, /* satisfied */
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no_signal, /* signal */
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no_get_fd, /* get_fd */
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no_map_access, /* map_access */
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default_get_sd, /* get_sd */
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default_set_sd, /* set_sd */
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no_lookup_name, /* lookup_name */
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no_open_file, /* open_file */
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no_close_handle, /* close_handle */
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no_destroy /* destroy */
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};
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#define MINUPDATELAPSE (2 * TICKS_PER_SEC)
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/* dump a clipboard object */
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static void clipboard_dump( struct object *obj, int verbose )
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{
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struct clipboard *clipboard = (struct clipboard *)obj;
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fprintf( stderr, "Clipboard open_thread=%p open_win=%08x owner_thread=%p owner_win=%08x viewer=%08x seq=%u\n",
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clipboard->open_thread, clipboard->open_win, clipboard->owner_thread,
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clipboard->owner_win, clipboard->viewer, clipboard->seqno );
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}
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/* retrieve the clipboard info for the current process, allocating it if needed */
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static struct clipboard *get_process_clipboard(void)
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{
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struct clipboard *clipboard;
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struct winstation *winstation = get_process_winstation( current->process, WINSTA_ACCESSCLIPBOARD );
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if (!winstation) return NULL;
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if (!(clipboard = winstation->clipboard))
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{
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if ((clipboard = alloc_object( &clipboard_ops )))
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{
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clipboard->open_thread = NULL;
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clipboard->open_win = 0;
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clipboard->owner_thread = NULL;
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clipboard->owner_win = 0;
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clipboard->viewer = 0;
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clipboard->seqno = 0;
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clipboard->seqno_timestamp = 0;
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winstation->clipboard = clipboard;
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}
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}
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release_object( winstation );
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return clipboard;
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}
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/* Called when thread terminates to allow release of clipboard */
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void cleanup_clipboard_thread(struct thread *thread)
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{
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struct clipboard *clipboard;
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struct winstation *winstation;
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if (!thread->process->winstation) return;
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if (!(winstation = get_process_winstation( thread->process, WINSTA_ACCESSCLIPBOARD ))) return;
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if ((clipboard = winstation->clipboard))
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{
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if (thread == clipboard->open_thread)
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{
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clipboard->open_win = 0;
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clipboard->open_thread = NULL;
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}
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if (thread == clipboard->owner_thread)
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{
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clipboard->owner_win = 0;
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clipboard->owner_thread = NULL;
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}
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}
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release_object( winstation );
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}
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static int open_clipboard( struct clipboard *clipboard, user_handle_t win )
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{
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win = get_user_full_handle( win );
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if (clipboard->open_thread && clipboard->open_win != win)
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{
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set_error(STATUS_WAS_LOCKED);
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return 0;
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}
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clipboard->open_win = win;
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clipboard->open_thread = current;
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return 1;
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}
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static int close_clipboard( struct clipboard *clipboard )
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{
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if (clipboard->open_thread != current)
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{
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set_win32_error( ERROR_CLIPBOARD_NOT_OPEN );
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return 0;
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}
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clipboard->open_thread = NULL;
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clipboard->open_win = 0;
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return 1;
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}
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static int release_clipboard_owner( struct clipboard *clipboard, user_handle_t win )
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{
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if ((clipboard->open_thread && clipboard->open_thread->process != current->process) ||
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(win && clipboard->owner_win != get_user_full_handle( win )))
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{
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set_win32_error( ERROR_CLIPBOARD_NOT_OPEN );
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return 0;
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}
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clipboard->owner_win = 0;
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clipboard->owner_thread = NULL;
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return 1;
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}
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static int get_seqno( struct clipboard *clipboard )
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{
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if (!clipboard->owner_thread && (current_time - clipboard->seqno_timestamp > MINUPDATELAPSE))
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{
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clipboard->seqno_timestamp = current_time;
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clipboard->seqno++;
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}
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return clipboard->seqno;
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}
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DECL_HANDLER(set_clipboard_info)
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{
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struct clipboard *clipboard = get_process_clipboard();
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if (!clipboard) return;
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reply->old_clipboard = clipboard->open_win;
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reply->old_owner = clipboard->owner_win;
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reply->old_viewer = clipboard->viewer;
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if (req->flags & SET_CB_OPEN)
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{
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if (!open_clipboard( clipboard, req->clipboard )) return;
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}
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else if (req->flags & SET_CB_CLOSE)
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{
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if (!close_clipboard( clipboard )) return;
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}
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if (req->flags & SET_CB_RELOWNER)
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{
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if (!release_clipboard_owner( clipboard, req->owner )) return;
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}
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if (req->flags & SET_CB_VIEWER) clipboard->viewer = get_user_full_handle( req->viewer );
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if (req->flags & SET_CB_SEQNO) clipboard->seqno++;
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reply->seqno = get_seqno( clipboard );
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if (clipboard->open_thread == current) reply->flags |= CB_OPEN;
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if (clipboard->owner_thread == current) reply->flags |= CB_OWNER;
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if (clipboard->owner_thread && clipboard->owner_thread->process == current->process)
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reply->flags |= CB_PROCESS;
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}
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/* empty the clipboard and grab ownership */
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DECL_HANDLER(empty_clipboard)
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{
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struct clipboard *clipboard = get_process_clipboard();
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if (!clipboard) return;
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if (clipboard->open_thread != current)
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{
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set_win32_error( ERROR_CLIPBOARD_NOT_OPEN );
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return;
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}
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clipboard->owner_win = clipboard->open_win;
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clipboard->owner_thread = clipboard->open_thread;
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clipboard->seqno++;
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}
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