123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298 |
- /*
- * Server-side window class management
- *
- * Copyright (C) 2002 Mike McCormack
- * Copyright (C) 2003 Alexandre Julliard
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
- */
- #include "config.h"
- #include "wine/port.h"
- #include <assert.h>
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include "ntstatus.h"
- #define WIN32_NO_STATUS
- #include "wine/list.h"
- #include "request.h"
- #include "object.h"
- #include "process.h"
- #include "user.h"
- #include "winuser.h"
- #include "winternl.h"
- struct window_class
- {
- struct list entry; /* entry in process list */
- struct process *process; /* process owning the class */
- int count; /* reference count */
- int local; /* local class? */
- atom_t atom; /* class atom */
- atom_t base_atom; /* base class atom for versioned class */
- mod_handle_t instance; /* module instance */
- unsigned int style; /* class style */
- int win_extra; /* number of window extra bytes */
- client_ptr_t client_ptr; /* pointer to class in client address space */
- int nb_extra_bytes; /* number of extra bytes */
- char extra_bytes[1]; /* extra bytes storage */
- };
- static struct window_class *create_class( struct process *process, int extra_bytes, int local )
- {
- struct window_class *class;
- if (!(class = mem_alloc( sizeof(*class) + extra_bytes - 1 ))) return NULL;
- class->process = (struct process *)grab_object( process );
- class->count = 0;
- class->local = local;
- class->nb_extra_bytes = extra_bytes;
- memset( class->extra_bytes, 0, extra_bytes );
- /* other fields are initialized by caller */
- /* local classes have priority so we put them first in the list */
- if (local) list_add_head( &process->classes, &class->entry );
- else list_add_tail( &process->classes, &class->entry );
- return class;
- }
- static void destroy_class( struct window_class *class )
- {
- release_global_atom( NULL, class->atom );
- release_global_atom( NULL, class->base_atom );
- list_remove( &class->entry );
- release_object( class->process );
- free( class );
- }
- void destroy_process_classes( struct process *process )
- {
- struct list *ptr;
- while ((ptr = list_head( &process->classes )))
- {
- struct window_class *class = LIST_ENTRY( ptr, struct window_class, entry );
- destroy_class( class );
- }
- }
- static struct window_class *find_class( struct process *process, atom_t atom, mod_handle_t instance )
- {
- struct list *ptr;
- LIST_FOR_EACH( ptr, &process->classes )
- {
- int is_win16;
- struct window_class *class = LIST_ENTRY( ptr, struct window_class, entry );
- if (class->atom != atom) continue;
- is_win16 = !(class->instance >> 16);
- if (!instance || !class->local || class->instance == instance ||
- (!is_win16 && ((class->instance & ~0xffff) == (instance & ~0xffff)))) return class;
- }
- return NULL;
- }
- struct window_class *grab_class( struct process *process, atom_t atom,
- mod_handle_t instance, int *extra_bytes )
- {
- struct window_class *class = find_class( process, atom, instance );
- if (class)
- {
- class->count++;
- *extra_bytes = class->win_extra;
- }
- else set_error( STATUS_INVALID_HANDLE );
- return class;
- }
- void release_class( struct window_class *class )
- {
- assert( class->count > 0 );
- class->count--;
- }
- int is_desktop_class( struct window_class *class )
- {
- return (class->atom == DESKTOP_ATOM && !class->local);
- }
- int is_hwnd_message_class( struct window_class *class )
- {
- static const WCHAR messageW[] = {'M','e','s','s','a','g','e'};
- static const struct unicode_str name = { messageW, sizeof(messageW) };
- return (!class->local && class->atom == find_global_atom( NULL, &name ));
- }
- atom_t get_class_atom( struct window_class *class )
- {
- return class->base_atom;
- }
- client_ptr_t get_class_client_ptr( struct window_class *class )
- {
- return class->client_ptr;
- }
- /* create a window class */
- DECL_HANDLER(create_class)
- {
- struct window_class *class;
- struct unicode_str name = get_req_unicode_str();
- atom_t atom, base_atom;
- if (name.len)
- {
- atom = add_global_atom( NULL, &name );
- if (!atom) return;
- if (req->name_offset && req->name_offset < name.len / sizeof(WCHAR))
- {
- name.str += req->name_offset;
- name.len -= req->name_offset * sizeof(WCHAR);
- base_atom = add_global_atom( NULL, &name );
- if (!base_atom)
- {
- release_global_atom( NULL, atom );
- return;
- }
- }
- else
- {
- base_atom = atom;
- grab_global_atom( NULL, atom );
- }
- }
- else
- {
- base_atom = atom = req->atom;
- if (!grab_global_atom( NULL, atom )) return;
- grab_global_atom( NULL, base_atom );
- }
- class = find_class( current->process, atom, req->instance );
- if (class && !class->local == !req->local)
- {
- set_win32_error( ERROR_CLASS_ALREADY_EXISTS );
- release_global_atom( NULL, atom );
- release_global_atom( NULL, base_atom );
- return;
- }
- if (req->extra < 0 || req->extra > 4096 || req->win_extra < 0 || req->win_extra > 4096)
- {
- /* don't allow stupid values here */
- set_error( STATUS_INVALID_PARAMETER );
- release_global_atom( NULL, atom );
- release_global_atom( NULL, base_atom );
- return;
- }
- if (!(class = create_class( current->process, req->extra, req->local )))
- {
- release_global_atom( NULL, atom );
- release_global_atom( NULL, base_atom );
- return;
- }
- class->atom = atom;
- class->base_atom = base_atom;
- class->instance = req->instance;
- class->style = req->style;
- class->win_extra = req->win_extra;
- class->client_ptr = req->client_ptr;
- reply->atom = atom;
- }
- /* destroy a window class */
- DECL_HANDLER(destroy_class)
- {
- struct window_class *class;
- struct unicode_str name = get_req_unicode_str();
- atom_t atom = req->atom;
- if (name.len) atom = find_global_atom( NULL, &name );
- if (!(class = find_class( current->process, atom, req->instance )))
- set_win32_error( ERROR_CLASS_DOES_NOT_EXIST );
- else if (class->count)
- set_win32_error( ERROR_CLASS_HAS_WINDOWS );
- else
- {
- reply->client_ptr = class->client_ptr;
- destroy_class( class );
- }
- }
- /* set some information in a class */
- DECL_HANDLER(set_class_info)
- {
- struct window_class *class = get_window_class( req->window );
- if (!class) return;
- if (req->flags && class->process != current->process)
- {
- set_error( STATUS_ACCESS_DENIED );
- return;
- }
- if (req->extra_size > sizeof(req->extra_value) ||
- req->extra_offset < -1 ||
- req->extra_offset > class->nb_extra_bytes - (int)req->extra_size)
- {
- set_win32_error( ERROR_INVALID_INDEX );
- return;
- }
- if ((req->flags & SET_CLASS_WINEXTRA) && (req->win_extra < 0 || req->win_extra > 4096))
- {
- set_error( STATUS_INVALID_PARAMETER );
- return;
- }
- if (req->extra_offset != -1)
- {
- memcpy( &reply->old_extra_value, class->extra_bytes + req->extra_offset, req->extra_size );
- }
- else if (req->flags & SET_CLASS_EXTRA)
- {
- set_win32_error( ERROR_INVALID_INDEX );
- return;
- }
- reply->old_atom = class->atom;
- reply->old_style = class->style;
- reply->old_extra = class->nb_extra_bytes;
- reply->old_win_extra = class->win_extra;
- reply->old_instance = class->instance;
- reply->base_atom = class->base_atom;
- if (req->flags & SET_CLASS_ATOM)
- {
- if (!grab_global_atom( NULL, req->atom )) return;
- release_global_atom( NULL, class->atom );
- class->atom = req->atom;
- }
- if (req->flags & SET_CLASS_STYLE) class->style = req->style;
- if (req->flags & SET_CLASS_WINEXTRA) class->win_extra = req->win_extra;
- if (req->flags & SET_CLASS_INSTANCE) class->instance = req->instance;
- if (req->flags & SET_CLASS_EXTRA) memcpy( class->extra_bytes + req->extra_offset,
- &req->extra_value, req->extra_size );
- }
|