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https://github.com/reactos/wine.git
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271 lines
7.8 KiB
C
271 lines
7.8 KiB
C
/*
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* Server-side window class management
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*
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* Copyright (C) 2002 Mike McCormack
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* Copyright (C) 2003 Alexandre Julliard
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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 "wine/list.h"
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#include "request.h"
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#include "object.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 window_class
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{
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struct list entry; /* entry in process list */
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struct process *process; /* process owning the class */
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int count; /* reference count */
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int local; /* local class? */
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atom_t atom; /* class atom */
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mod_handle_t instance; /* module instance */
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unsigned int style; /* class style */
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int win_extra; /* number of window extra bytes */
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client_ptr_t client_ptr; /* pointer to class in client address space */
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int nb_extra_bytes; /* number of extra bytes */
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char extra_bytes[1]; /* extra bytes storage */
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};
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static struct window_class *create_class( struct process *process, int extra_bytes, int local )
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{
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struct window_class *class;
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if (!(class = mem_alloc( sizeof(*class) + extra_bytes - 1 ))) return NULL;
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class->process = (struct process *)grab_object( process );
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class->count = 0;
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class->local = local;
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class->nb_extra_bytes = extra_bytes;
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memset( class->extra_bytes, 0, extra_bytes );
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/* other fields are initialized by caller */
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/* local classes have priority so we put them first in the list */
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if (local) list_add_head( &process->classes, &class->entry );
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else list_add_tail( &process->classes, &class->entry );
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return class;
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}
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static void destroy_class( struct window_class *class )
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{
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list_remove( &class->entry );
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release_object( class->process );
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free( class );
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}
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void destroy_process_classes( struct process *process )
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{
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struct list *ptr;
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while ((ptr = list_head( &process->classes )))
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{
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struct window_class *class = LIST_ENTRY( ptr, struct window_class, entry );
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destroy_class( class );
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}
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}
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static struct window_class *find_class( struct process *process, atom_t atom, mod_handle_t instance )
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{
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struct list *ptr;
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LIST_FOR_EACH( ptr, &process->classes )
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{
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struct window_class *class = LIST_ENTRY( ptr, struct window_class, entry );
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if (class->atom != atom) continue;
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if (!instance || !class->local || class->instance == instance) return class;
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}
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return NULL;
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}
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struct window_class *grab_class( struct process *process, atom_t atom,
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mod_handle_t instance, int *extra_bytes )
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{
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struct window_class *class = find_class( process, atom, instance );
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if (class)
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{
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class->count++;
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*extra_bytes = class->win_extra;
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}
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else set_error( STATUS_INVALID_HANDLE );
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return class;
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}
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void release_class( struct window_class *class )
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{
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assert( class->count > 0 );
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class->count--;
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}
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int is_desktop_class( struct window_class *class )
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{
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return (class->atom == DESKTOP_ATOM && !class->local);
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}
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int is_hwnd_message_class( struct window_class *class )
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{
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static const WCHAR messageW[] = {'M','e','s','s','a','g','e'};
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static const struct unicode_str name = { messageW, sizeof(messageW) };
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return (!class->local && class->atom == find_global_atom( NULL, &name ));
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}
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atom_t get_class_atom( struct window_class *class )
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{
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return class->atom;
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}
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client_ptr_t get_class_client_ptr( struct window_class *class )
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{
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return class->client_ptr;
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}
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/* create a window class */
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DECL_HANDLER(create_class)
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{
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struct window_class *class;
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struct unicode_str name;
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atom_t atom;
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get_req_unicode_str( &name );
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if (name.len)
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{
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atom = add_global_atom( NULL, &name );
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if (!atom) return;
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}
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else
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{
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atom = req->atom;
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if (!grab_global_atom( NULL, atom )) return;
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}
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class = find_class( current->process, atom, req->instance );
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if (class && !class->local == !req->local)
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{
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set_win32_error( ERROR_CLASS_ALREADY_EXISTS );
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release_global_atom( NULL, atom );
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return;
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}
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if (req->extra < 0 || req->extra > 4096 || req->win_extra < 0 || req->win_extra > 4096)
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{
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/* don't allow stupid values here */
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set_error( STATUS_INVALID_PARAMETER );
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release_global_atom( NULL, atom );
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return;
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}
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if (!(class = create_class( current->process, req->extra, req->local )))
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{
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release_global_atom( NULL, atom );
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return;
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}
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class->atom = atom;
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class->instance = req->instance;
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class->style = req->style;
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class->win_extra = req->win_extra;
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class->client_ptr = req->client_ptr;
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reply->atom = atom;
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}
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/* destroy a window class */
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DECL_HANDLER(destroy_class)
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{
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struct window_class *class;
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struct unicode_str name;
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atom_t atom = req->atom;
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get_req_unicode_str( &name );
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if (name.len) atom = find_global_atom( NULL, &name );
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if (!(class = find_class( current->process, atom, req->instance )))
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set_win32_error( ERROR_CLASS_DOES_NOT_EXIST );
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else if (class->count)
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set_win32_error( ERROR_CLASS_HAS_WINDOWS );
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else
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{
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reply->client_ptr = class->client_ptr;
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destroy_class( class );
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}
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}
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/* set some information in a class */
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DECL_HANDLER(set_class_info)
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{
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struct window_class *class = get_window_class( req->window );
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if (!class) return;
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if (req->flags && class->process != current->process)
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{
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set_error( STATUS_ACCESS_DENIED );
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return;
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}
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if (req->extra_size > sizeof(req->extra_value) ||
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req->extra_offset < -1 ||
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req->extra_offset > class->nb_extra_bytes - (int)req->extra_size)
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{
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set_win32_error( ERROR_INVALID_INDEX );
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return;
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}
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if ((req->flags & SET_CLASS_WINEXTRA) && (req->win_extra < 0 || req->win_extra > 4096))
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{
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set_error( STATUS_INVALID_PARAMETER );
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return;
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}
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if (req->extra_offset != -1)
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{
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memcpy( &reply->old_extra_value, class->extra_bytes + req->extra_offset, req->extra_size );
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}
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else if (req->flags & SET_CLASS_EXTRA)
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{
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set_win32_error( ERROR_INVALID_INDEX );
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return;
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}
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reply->old_atom = class->atom;
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reply->old_style = class->style;
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reply->old_extra = class->nb_extra_bytes;
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reply->old_win_extra = class->win_extra;
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reply->old_instance = class->instance;
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if (req->flags & SET_CLASS_ATOM)
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{
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if (!grab_global_atom( NULL, req->atom )) return;
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release_global_atom( NULL, class->atom );
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class->atom = req->atom;
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}
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if (req->flags & SET_CLASS_STYLE) class->style = req->style;
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if (req->flags & SET_CLASS_WINEXTRA) class->win_extra = req->win_extra;
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if (req->flags & SET_CLASS_INSTANCE) class->instance = req->instance;
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if (req->flags & SET_CLASS_EXTRA) memcpy( class->extra_bytes + req->extra_offset,
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&req->extra_value, req->extra_size );
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}
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