reactos/dll/win32/shell32/ros-systray.c

   1 /*
   2  * Copyright 2004 Martin Fuchs
   3  *
   4  * Pass on icon notification messages to the systray implementation
   5  * in the currently running shell.
   6  *
   7  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include <stdarg.h>
  23 #include <malloc.h>
  24
  25 #include "windef.h"
  26 #include "winbase.h"
  27 #include "winuser.h"
  28 #include "shellapi.h"
  29
  30
  31  /* copy data structure for tray notifications */
  32 typedef struct TrayNotifyCDS_Dummy {
  33         DWORD   cookie;
  34         DWORD   notify_code;
  35         DWORD   nicon_data[1];  // placeholder for NOTIFYICONDATA structure
  36 } TrayNotifyCDS_Dummy;
  37
  38  /* The only difference between Shell_NotifyIconA and Shell_NotifyIconW is the call to SendMessageA/W. */
  39 static BOOL SHELL_NotifyIcon(DWORD dwMessage, void* pnid, HWND nid_hwnd, int nid_size, BOOL unicode)
  40 {
  41         HWND hwnd;
  42         COPYDATASTRUCT data;
  43
  44         BOOL ret = FALSE;
  45         int len = sizeof(TrayNotifyCDS_Dummy)-sizeof(DWORD)+nid_size;
  46
  47         TrayNotifyCDS_Dummy* pnotify_data = (TrayNotifyCDS_Dummy*) alloca(len);
  48
  49         pnotify_data->cookie = 1;
  50         pnotify_data->notify_code = dwMessage;
  51         memcpy(&pnotify_data->nicon_data, pnid, nid_size);
  52
  53         data.dwData = 1;
  54         data.cbData = len;
  55         data.lpData = pnotify_data;
  56
  57         for(hwnd=0; (hwnd=FindWindowExW(0, hwnd, L"Shell_TrayWnd", NULL)); )
  58                 if ((unicode?SendMessageW:SendMessageA)(hwnd, WM_COPYDATA, (WPARAM)nid_hwnd, (LPARAM)&data))
  59                         ret = TRUE;
  60
  61         return ret;
  62 }
  63
  64
  65 /*************************************************************************
  66  * Shell_NotifyIcon                     [SHELL32.296]
  67  * Shell_NotifyIconA                    [SHELL32.297]
  68  */
  69 BOOL WINAPI Shell_NotifyIconA(DWORD dwMessage, PNOTIFYICONDATAA pnid)
  70 {
  71         return SHELL_NotifyIcon(dwMessage, pnid, pnid->hWnd, pnid->cbSize, FALSE);
  72 }
  73
  74 /*************************************************************************
  75  * Shell_NotifyIconW                    [SHELL32.298]
  76  */
  77 BOOL WINAPI Shell_NotifyIconW(DWORD dwMessage, PNOTIFYICONDATAW pnid)
  78 {
  79         return SHELL_NotifyIcon(dwMessage, pnid, pnid->hWnd, pnid->cbSize, TRUE);
  80 }