/*****************************************************************
* SetFocus (USER32.@)
*/
HWND WINAPI SetFocus( HWND hwnd )
{
HWND hwndTop = hwnd;
HWND previous = GetFocus();
TRACE( "%p prev %p\n", hwnd, previous );
if (hwnd)
{
/* Check if we can set the focus to this window */
hwnd = WIN_GetFullHandle( hwnd );
if (!IsWindow( hwnd ))
{
SetLastError( ERROR_INVALID_WINDOW_HANDLE );
return 0;
}
if (hwnd == previous) return previous; /* nothing to do */
for (;;)
{
HWND parent;
LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
if (!(style & WS_CHILD)) break;
parent = GetAncestor( hwndTop, GA_PARENT );
if (!parent || parent == GetDesktopWindow())
{
if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return 0;
break;
}
if (parent == get_hwnd_message_parent()) return 0;
hwndTop = parent;
}
/* call hooks */
if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, (WPARAM)hwnd, (LPARAM)previous, TRUE )) return 0;
/* activate hwndTop if needed. */
if (hwndTop != GetActiveWindow())
{
if (!set_active_window( hwndTop, NULL, FALSE, FALSE )) return 0;
if (!IsWindow( hwnd )) return 0; /* Abort if window destroyed */
/* Do not change focus if the window is no longer active */
if (hwndTop != GetActiveWindow()) return 0;
}
}
else /* NULL hwnd passed in */
{
if (!previous) return 0; /* nothing to do */
if (HOOK_CallHooks( WH_CBT, HCBT_SETFOCUS, 0, (LPARAM)previous, TRUE )) return 0;
}
/* change focus and send messages */
return set_focus_window( hwnd );
}
/***********************************************************************
* CallMsgFilterW (USER32.@)
*/
BOOL WINAPI CallMsgFilterW( LPMSG msg, INT code )
{
if (HOOK_CallHooks( WH_SYSMSGFILTER, code, 0, (LPARAM)msg, TRUE )) return TRUE;
return HOOK_CallHooks( WH_MSGFILTER, code, 0, (LPARAM)msg, TRUE );
}
/*******************************************************************
* set_active_window
*/
static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus )
{
HWND previous = GetActiveWindow();
BOOL ret;
DWORD old_thread, new_thread;
CBTACTIVATESTRUCT cbt;
if (previous == hwnd)
{
if (prev) *prev = hwnd;
return TRUE;
}
/* call CBT hook chain */
cbt.fMouse = mouse;
cbt.hWndActive = previous;
if (HOOK_CallHooks( WH_CBT, HCBT_ACTIVATE, (WPARAM)hwnd, (LPARAM)&cbt, TRUE )) return FALSE;
if (IsWindow(previous))
{
SendMessageW( previous, WM_NCACTIVATE, FALSE, (LPARAM)hwnd );
SendMessageW( previous, WM_ACTIVATE,
MAKEWPARAM( WA_INACTIVE, IsIconic(previous) ), (LPARAM)hwnd );
}
SERVER_START_REQ( set_active_window )
{
req->handle = wine_server_user_handle( hwnd );
if ((ret = !wine_server_call_err( req )))
previous = wine_server_ptr_handle( reply->previous );
}
SERVER_END_REQ;
if (!ret) return FALSE;
if (prev) *prev = previous;
if (previous == hwnd) return TRUE;
if (hwnd)
{
/* send palette messages */
if (SendMessageW( hwnd, WM_QUERYNEWPALETTE, 0, 0 ))
SendMessageTimeoutW( HWND_BROADCAST, WM_PALETTEISCHANGING, (WPARAM)hwnd, 0,
SMTO_ABORTIFHUNG, 2000, NULL );
if (!IsWindow(hwnd)) return FALSE;
}
old_thread = previous ? GetWindowThreadProcessId( previous, NULL ) : 0;
new_thread = hwnd ? GetWindowThreadProcessId( hwnd, NULL ) : 0;
if (old_thread != new_thread)
{
HWND *list, *phwnd;
if ((list = WIN_ListChildren( GetDesktopWindow() )))
{
if (old_thread)
{
for (phwnd = list; *phwnd; phwnd++)
{
if (GetWindowThreadProcessId( *phwnd, NULL ) == old_thread)
SendMessageW( *phwnd, WM_ACTIVATEAPP, 0, new_thread );
}
}
if (new_thread)
{
for (phwnd = list; *phwnd; phwnd++)
{
if (GetWindowThreadProcessId( *phwnd, NULL ) == new_thread)
SendMessageW( *phwnd, WM_ACTIVATEAPP, 1, old_thread );
}
}
HeapFree( GetProcessHeap(), 0, list );
}
}
if (IsWindow(hwnd))
{
SendMessageW( hwnd, WM_NCACTIVATE, (hwnd == GetForegroundWindow()), (LPARAM)previous );
SendMessageW( hwnd, WM_ACTIVATE,
MAKEWPARAM( mouse ? WA_CLICKACTIVE : WA_ACTIVE, IsIconic(hwnd) ),
(LPARAM)previous );
if (GetAncestor( hwnd, GA_PARENT ) == GetDesktopWindow())
PostMessageW( GetDesktopWindow(), WM_PARENTNOTIFY, WM_NCACTIVATE, (LPARAM)hwnd );
if (hwnd == GetForegroundWindow() && !IsIconic( hwnd ))
USER_Driver->pSetActiveWindow( hwnd );
}
/* now change focus if necessary */
if (focus)
{
GUITHREADINFO info;
info.cbSize = sizeof(info);
GetGUIThreadInfo( GetCurrentThreadId(), &info );
/* Do not change focus if the window is no more active */
if (hwnd == info.hwndActive)
{
if (!info.hwndFocus || !hwnd || GetAncestor( info.hwndFocus, GA_ROOT ) != hwnd)
set_focus_window( hwnd );
}
}
return TRUE;
}