dll/win32/shell32/systray.cpp

   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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
  20  */
  21
  22 #include <precomp.h>
  23
  24 /* copy data structure for tray notifications */
  25 typedef struct TrayNotifyCDS_Dummy {
  26     DWORD    cookie;
  27     DWORD    notify_code;
  28     DWORD    nicon_data[1];    // placeholder for NOTIFYICONDATA structure
  29 } TrayNotifyCDS_Dummy;
  30
  31 /* The only difference between Shell_NotifyIconA and Shell_NotifyIconW is the call to SendMessageA/W. */
  32 static BOOL SHELL_NotifyIcon(DWORD dwMessage, void* pnid, HWND nid_hwnd, int nid_size, BOOL unicode)
  33 {
  34     HWND hwnd;
  35     COPYDATASTRUCT data;
  36
  37     BOOL ret = FALSE;
  38     int len = sizeof(TrayNotifyCDS_Dummy) - sizeof(DWORD) + nid_size;
  39
  40     TrayNotifyCDS_Dummy* pnotify_data = (TrayNotifyCDS_Dummy*) alloca(len);
  41
  42     pnotify_data->cookie = 1;
  43     pnotify_data->notify_code = dwMessage;
  44     memcpy(&pnotify_data->nicon_data, pnid, nid_size);
  45
  46     data.dwData = 1;
  47     data.cbData = len;
  48     data.lpData = pnotify_data;
  49
  50     for(hwnd = 0; (hwnd = FindWindowExW(0, hwnd, L"Shell_TrayWnd", NULL)); )
  51         if ((unicode ? SendMessageW : SendMessageA)(hwnd, WM_COPYDATA, (WPARAM)nid_hwnd, (LPARAM)&data))
  52             ret = TRUE;
  53
  54     return ret;
  55 }
  56
  57
  58 /*************************************************************************
  59  * Shell_NotifyIcon            [SHELL32.296]
  60  * Shell_NotifyIconA            [SHELL32.297]
  61  */
  62 BOOL WINAPI Shell_NotifyIconA(DWORD dwMessage, PNOTIFYICONDATAA pnid)
  63 {
  64     return SHELL_NotifyIcon(dwMessage, pnid, pnid->hWnd, pnid->cbSize, FALSE);
  65 }
  66
  67 /*************************************************************************
  68  * Shell_NotifyIconW            [SHELL32.298]
  69  */
  70 BOOL WINAPI Shell_NotifyIconW(DWORD dwMessage, PNOTIFYICONDATAW pnid)
  71 {
  72     return SHELL_NotifyIcon(dwMessage, pnid, pnid->hWnd, pnid->cbSize, TRUE);
  73 }