402 lines
12 KiB
C
402 lines
12 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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unsigned int open_seqno; /* sequence number at open time */
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timeout_t seqno_timestamp; /* time stamp of last seqno increment */
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unsigned int listen_size; /* size of listeners array */
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unsigned int listen_count; /* count of listeners */
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user_handle_t *listeners; /* array of listener windows */
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};
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static void clipboard_dump( struct object *obj, int verbose );
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static void clipboard_destroy( struct object *obj );
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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_link_name, /* link_name */
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NULL, /* unlink_name */
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no_open_file, /* open_file */
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no_close_handle, /* close_handle */
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clipboard_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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static void clipboard_destroy( struct object *obj )
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{
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struct clipboard *clipboard = (struct clipboard *)obj;
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free( clipboard->listeners );
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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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clipboard->listen_size = 0;
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clipboard->listen_count = 0;
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clipboard->listeners = NULL;
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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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/* add a clipboard listener */
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static void add_listener( struct clipboard *clipboard, user_handle_t window )
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{
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unsigned int i;
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for (i = 0; i < clipboard->listen_count; i++)
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{
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if (clipboard->listeners[i] != window) continue;
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set_error( STATUS_INVALID_PARAMETER ); /* already set */
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return;
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}
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if (clipboard->listen_size == clipboard->listen_count)
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{
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unsigned int new_size = max( 8, clipboard->listen_size * 2 );
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user_handle_t *new = realloc( clipboard->listeners, new_size * sizeof(*new) );
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if (!new)
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{
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set_error( STATUS_NO_MEMORY );
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return;
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}
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clipboard->listeners = new;
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clipboard->listen_size = new_size;
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}
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clipboard->listeners[clipboard->listen_count++] = window;
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}
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/* remove a clipboard listener */
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static int remove_listener( struct clipboard *clipboard, user_handle_t window )
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{
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unsigned int i;
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for (i = 0; i < clipboard->listen_count; i++)
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{
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if (clipboard->listeners[i] != window) continue;
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memmove( clipboard->listeners + i, clipboard->listeners + i + 1,
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(clipboard->listen_count - i - 1) * sizeof(*clipboard->listeners) );
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clipboard->listen_count--;
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return 1;
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}
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return 0;
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}
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/* close the clipboard, and return the viewer window that should be notified if any */
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static user_handle_t close_clipboard( struct clipboard *clipboard )
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{
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unsigned int i;
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clipboard->open_win = 0;
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clipboard->open_thread = NULL;
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if (clipboard->seqno == clipboard->open_seqno) return 0; /* unchanged */
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for (i = 0; i < clipboard->listen_count; i++)
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post_message( clipboard->listeners[i], WM_CLIPBOARDUPDATE, 0, 0 );
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return clipboard->viewer;
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}
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/* cleanup clipboard information upon window destruction */
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void cleanup_clipboard_window( struct desktop *desktop, user_handle_t window )
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{
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struct clipboard *clipboard = desktop->winstation->clipboard;
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if (!clipboard) return;
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remove_listener( clipboard, window );
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if (clipboard->viewer == window) clipboard->viewer = 0;
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if (clipboard->owner_win == window)
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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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if (clipboard->open_win == window)
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{
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user_handle_t viewer = close_clipboard( clipboard );
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if (viewer) send_notify_message( viewer, WM_DRAWCLIPBOARD, clipboard->owner_win, 0 );
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}
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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->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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if (thread == clipboard->open_thread)
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{
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user_handle_t viewer = close_clipboard( clipboard );
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if (viewer) send_notify_message( viewer, WM_DRAWCLIPBOARD, clipboard->owner_win, 0 );
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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 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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/* open the clipboard */
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DECL_HANDLER(open_clipboard)
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{
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struct clipboard *clipboard = get_process_clipboard();
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user_handle_t win = 0;
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if (!clipboard) return;
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if (req->window && !(win = get_valid_window_handle( req->window ))) return;
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if (clipboard->open_thread && clipboard->open_win != win)
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{
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set_error( STATUS_INVALID_LOCK_SEQUENCE );
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return;
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}
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if (!clipboard->open_thread) clipboard->open_seqno = clipboard->seqno; /* first open */
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clipboard->open_win = win;
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clipboard->open_thread = current;
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reply->owner = (clipboard->owner_thread && clipboard->owner_thread->process == current->process);
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}
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/* close the clipboard */
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DECL_HANDLER(close_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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if (req->changed) clipboard->seqno++;
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reply->viewer = close_clipboard( clipboard );
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reply->owner = (clipboard->owner_thread && clipboard->owner_thread->process == current->process);
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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_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_SEQNO) clipboard->seqno++;
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reply->seqno = get_seqno( clipboard );
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if (clipboard->open_thread) reply->flags |= CB_OPEN_ANY;
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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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/* Get clipboard information */
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DECL_HANDLER(get_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->window = clipboard->open_win;
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reply->owner = clipboard->owner_win;
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reply->viewer = clipboard->viewer;
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reply->seqno = get_seqno( clipboard );
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}
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/* set the clipboard viewer window */
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DECL_HANDLER(set_clipboard_viewer)
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{
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struct clipboard *clipboard = get_process_clipboard();
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user_handle_t viewer = 0, previous = 0;
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if (!clipboard) return;
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if (req->viewer && !(viewer = get_valid_window_handle( req->viewer ))) return;
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if (req->previous && !(previous = get_valid_window_handle( req->previous ))) return;
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reply->old_viewer = clipboard->viewer;
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reply->owner = clipboard->owner_win;
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if (!previous || clipboard->viewer == previous)
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clipboard->viewer = viewer;
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else
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set_error( STATUS_PENDING ); /* need to send message instead */
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}
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/* add a clipboard listener window */
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DECL_HANDLER(add_clipboard_listener)
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{
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struct clipboard *clipboard = get_process_clipboard();
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user_handle_t win;
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if (!clipboard) return;
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if (!(win = get_valid_window_handle( req->window ))) return;
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add_listener( clipboard, win );
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}
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/* remove a clipboard listener window */
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DECL_HANDLER(remove_clipboard_listener)
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{
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struct clipboard *clipboard = get_process_clipboard();
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user_handle_t win;
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if (!clipboard) return;
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if (!(win = get_valid_window_handle( req->window ))) return;
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if (!remove_listener( clipboard, win )) set_error( STATUS_INVALID_PARAMETER );
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}
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