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_data_msg  /* platform-independent data */
  40 {
  41     ULONG     hWnd;
  42     UINT      uCallbackMessage;
  43     UINT      uEdge;
  44     RECT      rc;
  45     ULONGLONG lParam;
  46 };
  47
  48 struct appbar_cmd
  49 {
  50     ULONG  return_map;
  51     DWORD  return_process;
  52     struct appbar_data_msg abd;
  53 };
  54
  55 struct appbar_response
  56 {
  57     ULONGLONG result;
  58     struct appbar_data_msg abd;
  59 };
  60
  61 /*************************************************************************
  62  * SHAppBarMessage            [SHELL32.@]
  63  */
  64 UINT_PTR WINAPI SHAppBarMessage(DWORD msg, PAPPBARDATA data)
  65 {
  66     struct appbar_cmd command;
  67     struct appbar_response* response;
  68     HANDLE return_map;
  69     LPVOID return_view;
  70     HWND appbarmsg_window;
  71     COPYDATASTRUCT cds;
  72     DWORD_PTR msg_result;
  73     static const WCHAR classname[] = {'W','i','n','e','A','p','p','B','a','r',0};
  74
  75     UINT_PTR ret = 0;
  76
  77     TRACE("msg=%d, data={cb=%d, hwnd=%p, callback=%x, edge=%d, rc=%s, lparam=%lx}\n",
  78             msg, data->cbSize, data->hWnd, data->uCallbackMessage, data->uEdge,
  79             wine_dbgstr_rect(&data->rc), data->lParam);
  80
  81     if (data->cbSize < sizeof(APPBARDATA))
  82     {
  83         WARN("data at %p is too small\n", data);
  84         return FALSE;
  85     }
  86
  87     command.abd.hWnd = HandleToLong( data->hWnd );
  88     command.abd.uCallbackMessage = data->uCallbackMessage;
  89     command.abd.uEdge = data->uEdge;
  90     command.abd.rc = data->rc;
  91     command.abd.lParam = data->lParam;
  92
  93     return_map = CreateFileMappingW(INVALID_HANDLE_VALUE, 0, PAGE_READWRITE, 0, sizeof(struct appbar_response), NULL);
  94     if (return_map == NULL)
  95     {
  96         ERR("couldn't create file mapping\n");
  97         return 0;
  98     }
  99     command.return_map = HandleToUlong( return_map );
 100
 101     command.return_process = GetCurrentProcessId();
 102
 103     appbarmsg_window = FindWindowW(classname, NULL);
 104     if (appbarmsg_window == NULL)
 105     {
 106         ERR("couldn't find appbar window\n");
 107         CloseHandle(return_map);
 108         return 0;
 109     }
 110
 111     cds.dwData = msg;
 112     cds.cbData = sizeof(command);
 113     cds.lpData = &command;
 114
 115     SendMessageTimeoutW(appbarmsg_window, WM_COPYDATA, (WPARAM)data->hWnd, (LPARAM)&cds, SMTO_BLOCK, INFINITE, &msg_result);
 116
 117     return_view = MapViewOfFile(return_map, FILE_MAP_READ, 0, 0, sizeof(struct appbar_response));
 118     if (return_view == NULL)
 119     {
 120         ERR("MapViewOfFile failed\n");
 121         CloseHandle(return_map);
 122         return 0;
 123     }
 124
 125     response = return_view;
 126
 127     ret = response->result;
 128     if (ret)
 129     {
 130         data->hWnd = UlongToHandle( response->abd.hWnd );
 131         data->uCallbackMessage = response->abd.uCallbackMessage;
 132         data->uEdge = response->abd.uEdge;
 133         data->rc = response->abd.rc;
 134         data->lParam = response->abd.lParam;
 135     }
 136     UnmapViewOfFile(return_view);
 137
 138     CloseHandle(return_map);
 139
 140     return ret;
 141 }