nt/addpm.c

   1 /* Add entries to the GNU Emacs Program Manager folder.
   2    Copyright (C) 1995, 2001-2016 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software: you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation, either version 3 of the License, or
   9 (at your option) any later version.
  10
  11 GNU Emacs 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
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /****************************************************************************
  20  *
  21  * Program: addpm       (adds emacs to the Windows program manager)
  22  *
  23  * Usage:
  24  *      argv[1] = install path for emacs
  25  *
  26  * argv[2] used to be an optional argument for setting the icon.
  27  * But now Emacs has a professional looking icon of its own.
  28  * If users really want to change it, they can go into the settings of
  29  * the shortcut that is created and do it there.
  30  */
  31
  32 /* Use parts of shell API that were introduced by the merge of IE4
  33    into the desktop shell.  If Windows 95 or NT4 users do not have IE4
  34    installed, then the DDE fallback for creating icons the Windows 3.1
  35    progman way will be used instead, but that is prone to lockups
  36    caused by other applications not servicing their message queues.  */
  37 #include <stdlib.h>
  38 #include <stdio.h>
  39 #include <malloc.h>
  40
  41 /* MinGW64 barfs if _WIN32_IE is defined to anything below 0x500.  */
  42 #ifndef MINGW_W64
  43 #define _WIN32_IE 0x400
  44 #endif
  45 /* Request C Object macros for COM interfaces.  */
  46 #define COBJMACROS 1
  47
  48 #include <windows.h>
  49 #include <shlobj.h>
  50 #include <ddeml.h>
  51
  52 #ifndef OLD_PATHS
  53 #include "../src/epaths.h"
  54 #endif
  55
  56 HDDEDATA CALLBACK
  57 DdeCallback (UINT uType, UINT uFmt, HCONV hconv,
  58              HSZ hsz1, HSZ hsz2, HDDEDATA hdata,
  59              DWORD dwData1, DWORD dwData2)
  60 {
  61   return ((HDDEDATA) NULL);
  62 }
  63
  64 #define DdeCommand(str)         \
  65         DdeClientTransaction ((LPBYTE)str, strlen (str)+1, conversation, (HSZ)NULL, \
  66                               CF_TEXT, XTYP_EXECUTE, 30000, NULL)
  67
  68 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
  69 #define REG_APP_PATH \
  70   "SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\App Paths\\emacs.exe"
  71
  72 static struct entry
  73 {
  74   const char *name;
  75   const char *value;
  76 }
  77 env_vars[] =
  78 {
  79 #ifdef OLD_PATHS
  80   {"emacs_dir", NULL},
  81   {"EMACSLOADPATH", "%emacs_dir%/site-lisp;%emacs_dir%/../site-lisp;%emacs_dir%/lisp"},
  82   {"SHELL", "%emacs_dir%/bin/cmdproxy.exe"},
  83   {"EMACSDATA", "%emacs_dir%/etc"},
  84   {"EMACSPATH", "%emacs_dir%/bin"},
  85   /* We no longer set INFOPATH because Info-default-directory-list
  86      is then ignored.  */
  87   /*  {"INFOPATH", "%emacs_dir%/info"},  */
  88   {"EMACSDOC", "%emacs_dir%/etc"},
  89   {"TERM", "cmd"}
  90 #else  /* !OLD_PATHS */
  91   {"emacs_dir", NULL},
  92   {"EMACSLOADPATH", PATH_SITELOADSEARCH ";" PATH_LOADSEARCH},
  93   {"SHELL", PATH_EXEC "/cmdproxy.exe"},
  94   {"EMACSDATA", PATH_DATA},
  95   {"EMACSPATH", PATH_EXEC},
  96   /* We no longer set INFOPATH because Info-default-directory-list
  97      is then ignored.  */
  98   /*  {"INFOPATH", "%emacs_dir%/info"},  */
  99   {"EMACSDOC", PATH_DOC},
 100   {"TERM", "cmd"}
 101 #endif
 102 };
 103
 104 void
 105 add_registry (const char *path)
 106 {
 107   HKEY hrootkey = NULL;
 108   int i;
 109
 110   /* Record the location of Emacs to the App Paths key if we have
 111      sufficient permissions to do so.  This helps Windows find emacs quickly
 112      if the user types emacs.exe in the "Run Program" dialog without having
 113      emacs on their path.  Some applications also use the same registry key
 114      to discover the installation directory for programs they are looking for.
 115      Multiple installations cannot be handled by this method, but it does not
 116      affect the general operation of other installations of Emacs, and we
 117      are blindly overwriting the Start Menu entries already.
 118   */
 119   if (RegCreateKeyEx (HKEY_LOCAL_MACHINE, REG_APP_PATH, 0, NULL,
 120                       REG_OPTION_NON_VOLATILE, KEY_WRITE, NULL,
 121                       &hrootkey, NULL) == ERROR_SUCCESS)
 122     {
 123       int len;
 124       char *emacs_path;
 125
 126       len = strlen (path) + 15; /* \bin\emacs.exe + terminator.  */
 127       emacs_path = (char *) alloca (len);
 128       sprintf (emacs_path, "%s\\bin\\emacs.exe", path);
 129
 130       RegSetValueEx (hrootkey, NULL, 0, REG_EXPAND_SZ, emacs_path, len);
 131       RegCloseKey (hrootkey);
 132     }
 133
 134   /* Previous versions relied on registry settings, but we do not need
 135      them any more.  If registry settings are installed from a previous
 136      version, replace them to ensure they are the current settings.
 137      Otherwise, do nothing.  */
 138
 139   /* Check both the current user and the local machine to see if we
 140      have any resources.  */
 141
 142   if (RegOpenKeyEx (HKEY_LOCAL_MACHINE, REG_ROOT, 0,
 143                     KEY_WRITE | KEY_QUERY_VALUE, &hrootkey) != ERROR_SUCCESS
 144       && RegOpenKeyEx (HKEY_CURRENT_USER, REG_ROOT, 0,
 145                        KEY_WRITE | KEY_QUERY_VALUE, &hrootkey) != ERROR_SUCCESS)
 146     return;
 147
 148   for (i = 0; i < (sizeof (env_vars) / sizeof (env_vars[0])); i++)
 149     {
 150       const char * value = env_vars[i].value ? env_vars[i].value : path;
 151
 152       /* Replace only those settings that already exist.  */
 153       if (RegQueryValueEx (hrootkey, env_vars[i].name, NULL,
 154                            NULL, NULL, NULL) == ERROR_SUCCESS)
 155         RegSetValueEx (hrootkey, env_vars[i].name, 0, REG_EXPAND_SZ,
 156                        value, lstrlen (value) + 1);
 157     }
 158
 159   RegCloseKey (hrootkey);
 160 }
 161
 162 int
 163 main (int argc, char *argv[])
 164 {
 165   char start_folder[MAX_PATH + 1];
 166   int shortcuts_created = 0;
 167   int com_available = 1;
 168   char modname[MAX_PATH];
 169   const char *prog_name;
 170   const char *emacs_path;
 171   char *p;
 172   int quiet = 0;
 173   HRESULT result;
 174   IShellLinkA *shortcut;
 175
 176   /* If no args specified, use our location to set emacs_path.  */
 177
 178   if (argc > 1
 179       && (argv[1][0] == '/' || argv[1][0] == '-')
 180       && argv[1][1] == 'q')
 181     {
 182       quiet = 1;
 183       --argc;
 184       ++argv;
 185     }
 186
 187   if (argc > 1)
 188     emacs_path = argv[1];
 189   else
 190     {
 191       if (!GetModuleFileName (NULL, modname, MAX_PATH) ||
 192           (p = strrchr (modname, '\\')) == NULL)
 193         {
 194           fprintf (stderr, "fatal error");
 195           exit (1);
 196         }
 197       *p = 0;
 198
 199       /* Set emacs_path to emacs_dir if we are in "%emacs_dir%\bin".  */
 200       if ((p = strrchr (modname, '\\')) && stricmp (p, "\\bin") == 0)
 201         {
 202           *p = 0;
 203           emacs_path = modname;
 204         }
 205       else
 206         {
 207           fprintf (stderr, "usage: addpm emacs_path\n");
 208           exit (1);
 209         }
 210
 211       /* Tell user what we are going to do.  */
 212       if (!quiet)
 213         {
 214           int result;
 215
 216           char msg[ MAX_PATH ];
 217           sprintf (msg, "Install Emacs at %s?\n", emacs_path);
 218           result = MessageBox (NULL, msg, "Install Emacs",
 219                                MB_OKCANCEL | MB_ICONQUESTION);
 220           if (result != IDOK)
 221             {
 222               fprintf (stderr, "Install canceled\n");
 223               exit (1);
 224             }
 225         }
 226     }
 227
 228   add_registry (emacs_path);
 229   prog_name =  "runemacs.exe";
 230
 231   /* Try to install globally.  */
 232
 233   if (!SUCCEEDED (CoInitialize (NULL))
 234       || !SUCCEEDED (CoCreateInstance (&CLSID_ShellLink, NULL,
 235                                         CLSCTX_INPROC_SERVER, &IID_IShellLinkA,
 236                                         (void **) &shortcut)))
 237     {
 238       com_available = 0;
 239     }
 240
 241   if (com_available
 242       && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_COMMON_PROGRAMS, 0))
 243     {
 244       if (strlen (start_folder) < (MAX_PATH - 20))
 245         {
 246           strcat (start_folder, "\\Gnu Emacs");
 247           if (CreateDirectory (start_folder, NULL)
 248               || GetLastError () == ERROR_ALREADY_EXISTS)
 249             {
 250               char full_emacs_path[MAX_PATH + 1];
 251               IPersistFile *lnk;
 252               strcat (start_folder, "\\Emacs.lnk");
 253               sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
 254               IShellLinkA_SetPath (shortcut, full_emacs_path);
 255               IShellLinkA_SetDescription (shortcut, "GNU Emacs");
 256               result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
 257                                                    (void **) &lnk);
 258               if (SUCCEEDED (result))
 259                 {
 260                   wchar_t unicode_path[MAX_PATH];
 261                   MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
 262                                        unicode_path, MAX_PATH);
 263                   if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
 264                     shortcuts_created = 1;
 265                   IPersistFile_Release (lnk);
 266                 }
 267             }
 268         }
 269     }
 270
 271   if (!shortcuts_created && com_available
 272       && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_PROGRAMS, 0))
 273     {
 274       /* Ensure there is enough room for "...\GNU Emacs\Emacs.lnk".  */
 275       if (strlen (start_folder) < (MAX_PATH - 20))
 276         {
 277           strcat (start_folder, "\\Gnu Emacs");
 278           if (CreateDirectory (start_folder, NULL)
 279               || GetLastError () == ERROR_ALREADY_EXISTS)
 280             {
 281               char full_emacs_path[MAX_PATH + 1];
 282               IPersistFile *lnk;
 283               strcat (start_folder, "\\Emacs.lnk");
 284               sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
 285               IShellLinkA_SetPath (shortcut, full_emacs_path);
 286               IShellLinkA_SetDescription (shortcut, "GNU Emacs");
 287               result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
 288                                                    (void **) &lnk);
 289               if (SUCCEEDED (result))
 290                 {
 291                   wchar_t unicode_path[MAX_PATH];
 292                   MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
 293                                        unicode_path, MAX_PATH);
 294                   if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
 295                     shortcuts_created = 1;
 296                   IPersistFile_Release (lnk);
 297
 298                 }
 299             }
 300         }
 301     }
 302
 303   if (com_available)
 304     IShellLinkA_Release (shortcut);
 305
 306   /* Need to call uninitialize, even if ComInitialize failed.  */
 307   CoUninitialize ();
 308
 309   /* Fallback on old DDE method if the above failed.  */
 310   if (!shortcuts_created)
 311     {
 312       DWORD dde = 0;
 313       HCONV conversation;
 314       HSZ progman;
 315       char add_item[MAX_PATH*2 + 100];
 316
 317       DdeInitialize (&dde, (PFNCALLBACK) DdeCallback, APPCMD_CLIENTONLY, 0);
 318       progman = DdeCreateStringHandle (dde, "PROGMAN", CP_WINANSI);
 319       conversation = DdeConnect (dde, progman, progman, NULL);
 320       if (conversation)
 321         {
 322           DdeCommand ("[CreateGroup (\"Gnu Emacs\")]");
 323           DdeCommand ("[ReplaceItem (Emacs)]");
 324           sprintf (add_item, "[AddItem (\"%s\\bin\\%s\", Emacs)]",
 325                    emacs_path, prog_name);
 326           DdeCommand (add_item);
 327
 328           DdeDisconnect (conversation);
 329         }
 330
 331       DdeFreeStringHandle (dde, progman);
 332       DdeUninitialize (dde);
 333    }
 334
 335   return 0;
 336 }