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Sweden-Number/dlls/win32u/window.c

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/*
* Window related functions
*
* Copyright 1993, 1994 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
*/
#if 0
#pragma makedep unix
#endif
#include <pthread.h>
#include <assert.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "win32u_private.h"
#include "ntuser_private.h"
#include "wine/server.h"
#define NB_USER_HANDLES ((LAST_USER_HANDLE - FIRST_USER_HANDLE + 1) >> 1)
#define USER_HANDLE_TO_INDEX(hwnd) ((LOWORD(hwnd) - FIRST_USER_HANDLE) >> 1)
static void *user_handles[NB_USER_HANDLES];
static struct list window_surfaces = LIST_INIT( window_surfaces );
static pthread_mutex_t surfaces_lock = PTHREAD_MUTEX_INITIALIZER;
/***********************************************************************
* alloc_user_handle
*/
HANDLE alloc_user_handle( struct user_object *ptr, unsigned int type )
{
HANDLE handle = 0;
SERVER_START_REQ( alloc_user_handle )
{
if (!wine_server_call_err( req )) handle = wine_server_ptr_handle( reply->handle );
}
SERVER_END_REQ;
if (handle)
{
UINT index = USER_HANDLE_TO_INDEX( handle );
assert( index < NB_USER_HANDLES );
ptr->handle = handle;
ptr->type = type;
InterlockedExchangePointer( &user_handles[index], ptr );
}
return handle;
}
/***********************************************************************
* get_user_handle_ptr
*/
void *get_user_handle_ptr( HANDLE handle, unsigned int type )
{
struct user_object *ptr;
WORD index = USER_HANDLE_TO_INDEX( handle );
if (index >= NB_USER_HANDLES) return NULL;
user_lock();
if ((ptr = user_handles[index]))
{
if (ptr->type == type &&
((UINT)(UINT_PTR)ptr->handle == (UINT)(UINT_PTR)handle ||
!HIWORD(handle) || HIWORD(handle) == 0xffff))
return ptr;
ptr = NULL;
}
else ptr = OBJ_OTHER_PROCESS;
user_unlock();
return ptr;
}
/***********************************************************************
* set_user_handle_ptr
*/
void set_user_handle_ptr( HANDLE handle, struct user_object *ptr )
{
WORD index = USER_HANDLE_TO_INDEX(handle);
assert( index < NB_USER_HANDLES );
InterlockedExchangePointer( &user_handles[index], ptr );
}
/***********************************************************************
* release_user_handle_ptr
*/
void release_user_handle_ptr( void *ptr )
{
assert( ptr && ptr != OBJ_OTHER_PROCESS );
user_unlock();
}
/***********************************************************************
* free_user_handle
*/
void *free_user_handle( HANDLE handle, unsigned int type )
{
struct user_object *ptr;
WORD index = USER_HANDLE_TO_INDEX( handle );
if ((ptr = get_user_handle_ptr( handle, type )) && ptr != OBJ_OTHER_PROCESS)
{
SERVER_START_REQ( free_user_handle )
{
req->handle = wine_server_user_handle( handle );
if (wine_server_call( req )) ptr = NULL;
else InterlockedCompareExchangePointer( &user_handles[index], NULL, ptr );
}
SERVER_END_REQ;
user_unlock();
}
return ptr;
}
/***********************************************************************
* next_thread_window
*/
WND *next_thread_window_ptr( HWND *hwnd )
{
struct user_object *ptr;
WND *win;
WORD index = *hwnd ? USER_HANDLE_TO_INDEX( *hwnd ) + 1 : 0;
while (index < NB_USER_HANDLES)
{
if (!(ptr = user_handles[index++])) continue;
if (ptr->type != NTUSER_OBJ_WINDOW) continue;
win = (WND *)ptr;
if (win->tid != GetCurrentThreadId()) continue;
*hwnd = ptr->handle;
return win;
}
return NULL;
}
/*******************************************************************
* register_window_surface
*
* Register a window surface in the global list, possibly replacing another one.
*/
void register_window_surface( struct window_surface *old, struct window_surface *new )
{
if (old == new) return;
pthread_mutex_lock( &surfaces_lock );
if (old) list_remove( &old->entry );
if (new) list_add_tail( &window_surfaces, &new->entry );
pthread_mutex_unlock( &surfaces_lock );
}
/*******************************************************************
* flush_window_surfaces
*
* Flush pending output from all window surfaces.
*/
void flush_window_surfaces( BOOL idle )
{
static DWORD last_idle;
DWORD now;
struct window_surface *surface;
pthread_mutex_lock( &surfaces_lock );
now = NtGetTickCount();
if (idle) last_idle = now;
/* if not idle, we only flush if there's evidence that the app never goes idle */
else if ((int)(now - last_idle) < 50) goto done;
LIST_FOR_EACH_ENTRY( surface, &window_surfaces, struct window_surface, entry )
surface->funcs->flush( surface );
done:
pthread_mutex_unlock( &surfaces_lock );
}
/*******************************************************************
* is_desktop_window
*
* Check if window is the desktop or the HWND_MESSAGE top parent.
*/
static BOOL is_desktop_window( HWND hwnd )
{
struct user_thread_info *thread_info = get_user_thread_info();
if (!hwnd) return FALSE;
if (hwnd == thread_info->top_window) return TRUE;
if (hwnd == thread_info->msg_window) return TRUE;
if (!HIWORD(hwnd) || HIWORD(hwnd) == 0xffff)
{
if (LOWORD(thread_info->top_window) == LOWORD(hwnd)) return TRUE;
if (LOWORD(thread_info->msg_window) == LOWORD(hwnd)) return TRUE;
}
return FALSE;
}
/***********************************************************************
* win_get_ptr
*
* Return a pointer to the WND structure if local to the process,
* or WND_OTHER_PROCESS if handle may be valid in other process.
* If ret value is a valid pointer, it must be released with WIN_ReleasePtr.
*/
static WND *get_win_ptr( HWND hwnd )
{
WND *win;
if ((win = get_user_handle_ptr( hwnd, NTUSER_OBJ_WINDOW )) == WND_OTHER_PROCESS)
{
if (is_desktop_window( hwnd )) win = WND_DESKTOP;
}
return win;
}
/***********************************************************************
* is_current_thread_window
*
* Check whether a given window belongs to the current process (and return the full handle).
*/
HWND is_current_thread_window( HWND hwnd )
{
WND *win;
HWND ret = 0;
if (!(win = get_win_ptr( hwnd )) || win == WND_OTHER_PROCESS || win == WND_DESKTOP)
return 0;
if (win->tid == GetCurrentThreadId()) ret = win->obj.handle;
release_win_ptr( win );
return ret;
}
/***********************************************************************
* NtUserGetProp (win32u.@)
*
* NOTE Native allows only ATOMs as the second argument. We allow strings
* to save extra server call in GetPropW.
*/
HANDLE WINAPI NtUserGetProp( HWND hwnd, const WCHAR *str )
{
ULONG_PTR ret = 0;
SERVER_START_REQ( get_window_property )
{
req->window = wine_server_user_handle( hwnd );
if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
if (!wine_server_call_err( req )) ret = reply->data;
}
SERVER_END_REQ;
return (HANDLE)ret;
}
/*****************************************************************************
* NtUserSetProp (win32u.@)
*
* NOTE Native allows only ATOMs as the second argument. We allow strings
* to save extra server call in SetPropW.
*/
BOOL WINAPI NtUserSetProp( HWND hwnd, const WCHAR *str, HANDLE handle )
{
BOOL ret;
SERVER_START_REQ( set_window_property )
{
req->window = wine_server_user_handle( hwnd );
req->data = (ULONG_PTR)handle;
if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/***********************************************************************
* NtUserRemoveProp (win32u.@)
*
* NOTE Native allows only ATOMs as the second argument. We allow strings
* to save extra server call in RemovePropW.
*/
HANDLE WINAPI NtUserRemoveProp( HWND hwnd, const WCHAR *str )
{
ULONG_PTR ret = 0;
SERVER_START_REQ( remove_window_property )
{
req->window = wine_server_user_handle( hwnd );
if (IS_INTRESOURCE(str)) req->atom = LOWORD(str);
else wine_server_add_data( req, str, lstrlenW(str) * sizeof(WCHAR) );
if (!wine_server_call_err( req )) ret = reply->data;
}
SERVER_END_REQ;
return (HANDLE)ret;
}
/*****************************************************************************
* NtUserGetLayeredWindowAttributes (win32u.@)
*/
BOOL WINAPI NtUserGetLayeredWindowAttributes( HWND hwnd, COLORREF *key, BYTE *alpha, DWORD *flags )
{
BOOL ret;
SERVER_START_REQ( get_window_layered_info )
{
req->handle = wine_server_user_handle( hwnd );
if ((ret = !wine_server_call_err( req )))
{
if (key) *key = reply->color_key;
if (alpha) *alpha = reply->alpha;
if (flags) *flags = reply->flags;
}
}
SERVER_END_REQ;
return ret;
}
/*****************************************************************************
* NtUserBuildHwndList (win32u.@)
*/
NTSTATUS WINAPI NtUserBuildHwndList( HDESK desktop, ULONG unk2, ULONG unk3, ULONG unk4,
ULONG thread_id, ULONG count, HWND *buffer, ULONG *size )
{
user_handle_t *list = (user_handle_t *)buffer;
int i;
NTSTATUS status;
SERVER_START_REQ( get_window_children )
{
req->desktop = wine_server_obj_handle( desktop );
req->tid = thread_id;
if (count) wine_server_set_reply( req, list, (count - 1) * sizeof(user_handle_t) );
status = wine_server_call( req );
if (status && status != STATUS_BUFFER_TOO_SMALL) return status;
*size = reply->count + 1;
}
SERVER_END_REQ;
if (*size > count) return STATUS_BUFFER_TOO_SMALL;
/* start from the end since HWND is potentially larger than user_handle_t */
for (i = *size - 2; i >= 0; i--)
buffer[i] = wine_server_ptr_handle( list[i] );
buffer[*size - 1] = HWND_BOTTOM;
return STATUS_SUCCESS;
}
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