dlls/shell32/appbar.c

   1 /*
   2  * SHAppBarMessage implementation
   3  *
   4  * Copyright 2008 Vincent Povirk for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <stdarg.h>
  26 #include <stdio.h>
  27
  28 #include "windef.h"
  29 #include "winbase.h"
  30 #include "winerror.h"
  31 #include "shellapi.h"
  32 #include "winuser.h"
  33
  34 #include "wine/debug.h"
  35 #include "wine/unicode.h"
  36
  37 WINE_DEFAULT_DEBUG_CHANNEL(appbar);
  38
  39 struct appbar_cmd
  40 {
  41     HANDLE return_map;
  42     DWORD return_process;
  43     APPBARDATA abd;
  44 };
  45
  46 struct appbar_response
  47 {
  48     UINT_PTR result;
  49     APPBARDATA abd;
  50 };
  51
  52 /*************************************************************************
  53  * SHAppBarMessage            [SHELL32.@]
  54  */
  55 UINT_PTR WINAPI SHAppBarMessage(DWORD msg, PAPPBARDATA data)
  56 {
  57     struct appbar_cmd command;
  58     struct appbar_response* response;
  59     HANDLE return_map;
  60     LPVOID return_view;
  61     HWND appbarmsg_window;
  62     COPYDATASTRUCT cds;
  63     DWORD_PTR msg_result;
  64     static const WCHAR classname[] = {'W','i','n','e','A','p','p','B','a','r',0};
  65
  66     UINT_PTR ret = 0;
  67
  68     TRACE("msg=%d, data={cb=%d, hwnd=%p, callback=%x, edge=%d, rc=%s, lparam=%lx}\n",
  69             msg, data->cbSize, data->hWnd, data->uCallbackMessage, data->uEdge,
  70             wine_dbgstr_rect(&data->rc), data->lParam);
  71
  72     if (data->cbSize < sizeof(APPBARDATA))
  73     {
  74         WARN("data at %p is too small\n", data);
  75         return FALSE;
  76     }
  77
  78     command.abd = *data;
  79
  80     return_map = CreateFileMappingW(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, sizeof(struct appbar_response), NULL);
  81     if (return_map == NULL)
  82     {
  83         ERR("couldn't create file mapping\n");
  84         return 0;
  85     }
  86     command.return_map = return_map;
  87
  88     command.return_process = GetCurrentProcessId();
  89
  90     appbarmsg_window = FindWindowW(classname, NULL);
  91     if (appbarmsg_window == NULL)
  92     {
  93         ERR("couldn't find appbar window\n");
  94         CloseHandle(return_map);
  95         return 0;
  96     }
  97
  98     cds.dwData = msg;
  99     cds.cbData = sizeof(command);
 100     cds.lpData = &command;
 101
 102     SendMessageTimeoutW(appbarmsg_window, WM_COPYDATA, (WPARAM)data->hWnd, (LPARAM)&cds, SMTO_BLOCK, INFINITE, &msg_result);
 103
 104     return_view = MapViewOfFile(return_map, FILE_MAP_READ, 0, 0, sizeof(struct appbar_response));
 105     if (return_view == NULL)
 106     {
 107         ERR("MapViewOfFile failed\n");
 108         CloseHandle(return_map);
 109         return 0;
 110     }
 111
 112     response = (struct appbar_response*)return_view;
 113
 114     ret = response->result;
 115     *data = response->abd;
 116
 117     UnmapViewOfFile(return_view);
 118
 119     CloseHandle(return_map);
 120
 121     return ret;
 122 }