[Emacs-diffs] emacs/nt addpm.c

[Jason Rumney]

CVSROOT:        /sources/emacs
Module name:    emacs
Changes by:     Jason Rumney <jasonr>   09/01/15 15:02:55

Modified files:
        nt             : addpm.c 

Log message:
        (main): Try using COM to create start menu shortcuts
        before resorting to DDE (Bug#202)
        Remove second command-line argument.

CVSWeb URLs:
http://cvs.savannah.gnu.org/viewcvs/emacs/nt/addpm.c?cvsroot=emacs&r1=1.30&r2=1.31

Patches:
Index: addpm.c
===================================================================
RCS file: /sources/emacs/emacs/nt/addpm.c,v
retrieving revision 1.30
retrieving revision 1.31
diff -u -b -r1.30 -r1.31
--- addpm.c     8 Jan 2009 03:28:19 -0000       1.30
+++ addpm.c     15 Jan 2009 15:02:55 -0000      1.31
@@ -23,10 +23,24 @@
  *
  * Usage:
  *     argv[1] = install path for emacs
- *     argv[2] = full path to icon for emacs (optional)
+ *
+ * argv[2] used to be an optional argument for setting the icon.
+ * But now Emacs has a professional looking icon of its own.
+ * If users really want to change it, they can go into the settings of
+ * the shortcut that is created and do it there.
  */
 
+/* Use parts of shell API that were introduced by the merge of IE4
+   into the desktop shell.  If Windows 95 or NT4 users do not have IE4
+   installed, then the DDE fallback for creating icons the Windows 3.1
+   progman way will be used instead, but that is prone to lockups
+   caused by other applications not servicing their message queues.  */
+#define _WIN32_IE 0x400
+/* Request C Object macros for COM interfaces.  */
+#define COBJMACROS 1
+
 #include <windows.h>
+#include <shlobj.h>
 #include <ddeml.h>
 #include <stdlib.h>
 #include <stdio.h>
@@ -41,7 +55,7 @@
 }
 
 #define DdeCommand(str)        \
-       DdeClientTransaction (str, strlen (str)+1, HConversation, (HSZ)NULL, \
+       DdeClientTransaction (str, strlen (str)+1, conversation, (HSZ)NULL, \
                              CF_TEXT, XTYP_EXECUTE, 30000, NULL)
 
 #define REG_ROOT "SOFTWARE\\GNU\\Emacs"
@@ -165,24 +179,18 @@
      int argc;
      char *argv[];
 {
-  DWORD idDde = 0;
-  HCONV HConversation;
-  HSZ ProgMan;
+  char start_folder[MAX_PATH + 1];
+  int shortcuts_created = 0;
+  int com_available = 1;
   char modname[MAX_PATH];
-  char additem[MAX_PATH*2 + 100];
   char *prog_name;
   char *emacs_path;
   char *p;
   int quiet = 0;
+  HRESULT result;
+  IShellLinkA *shortcut;
 
   /* If no args specified, use our location to set emacs_path.  */
-#if 0
-  if (argc < 2 || argc > 3)
-    {
-      fprintf (stderr, "usage: addpm [-q] [emacs_path [icon_path]]\n");
-      exit (1);
-    }
-#endif
 
   if (argc > 1
       && (argv[1][0] == '/' || argv[1][0] == '-')
@@ -213,7 +221,7 @@
        }
       else
        {
-         fprintf (stderr, "usage: addpm emacs_path [icon_path]\n");
+         fprintf (stderr, "usage: addpm emacs_path\n");
          exit (1);
        }
 
@@ -237,31 +245,115 @@
   add_registry (emacs_path);
   prog_name =  "runemacs.exe";
 
-  DdeInitialize (&idDde, (PFNCALLBACK)DdeCallback, APPCMD_CLIENTONLY, 0);
+  /* Try to install globally.  */
+
+  if (!SUCCEEDED (CoInitialize (NULL))
+      || !SUCCEEDED (CoCreateInstance (&CLSID_ShellLink, NULL,
+                                       CLSCTX_INPROC_SERVER, &IID_IShellLinkA,
+                                       (void **) &shortcut)))
+    {
+      com_available = 0;
+    }
+
+  if (com_available
+      && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_COMMON_PROGRAMS, 0))
+    {
+      if (strlen (start_folder) < (MAX_PATH - 20))
+       {
+         BOOL retval;
+
+         strcat (start_folder, "\\Gnu Emacs");
+         if (CreateDirectory (start_folder, NULL)
+             || GetLastError () == ERROR_ALREADY_EXISTS)
+           {
+             char full_emacs_path[MAX_PATH + 1];
+             IPersistFile *lnk;
+             strcat (start_folder, "\\Emacs.lnk");
+             sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
+             IShellLinkA_SetPath (shortcut, full_emacs_path);
+             IShellLinkA_SetDescription (shortcut, "GNU Emacs");
+             result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
+                                                  (void **) &lnk);
+             if (SUCCEEDED (result))
+               {
+                 wchar_t unicode_path[MAX_PATH];
+                 MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
+                                      unicode_path, MAX_PATH);
+                 if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
+                   shortcuts_created = 1;
+                 IPersistFile_Release (lnk);
+               }
+           }
+       }
+    }
+
+  if (!shortcuts_created && com_available
+      && SHGetSpecialFolderPath (NULL, start_folder, CSIDL_PROGRAMS, 0))
+    {
+      /* Ensure there is enough room for "...\GNU Emacs\Emacs.lnk".  */
+      if (strlen (start_folder) < (MAX_PATH - 20))
+       {
+         BOOL retval;
 
-  ProgMan = DdeCreateStringHandle (idDde, "PROGMAN", CP_WINANSI);
+         strcat (start_folder, "\\Gnu Emacs");
+         if (CreateDirectory (start_folder, NULL)
+             || GetLastError () == ERROR_ALREADY_EXISTS)
+           {
+             char full_emacs_path[MAX_PATH + 1];
+             IPersistFile *lnk;
+             strcat (start_folder, "\\Emacs.lnk");
+             sprintf (full_emacs_path, "%s\\bin\\%s", emacs_path, prog_name);
+             IShellLinkA_SetPath (shortcut, full_emacs_path);
+             IShellLinkA_SetDescription (shortcut, "GNU Emacs");
+             result = IShellLinkA_QueryInterface (shortcut, &IID_IPersistFile,
+                                                  (void **) &lnk);
+             if (SUCCEEDED (result))
+               {
+                 wchar_t unicode_path[MAX_PATH];
+                 MultiByteToWideChar (CP_ACP, 0, start_folder, -1,
+                                      unicode_path, MAX_PATH);
+                 if (SUCCEEDED (IPersistFile_Save (lnk, unicode_path, TRUE)))
+                   shortcuts_created = 1;
+                 IPersistFile_Release (lnk);
 
-  HConversation = DdeConnect (idDde, ProgMan, ProgMan, NULL);
-  if (HConversation != 0)
+               }
+           }
+       }      
+    }
+
+  if (com_available)
+    IShellLinkA_Release (shortcut);
+
+  /* Need to call uninitialize, even if ComInitialize failed.  */
+  CoUninitialize ();
+
+  /* Fallback on old DDE method if the above failed.  */
+  if (!shortcuts_created)
+    {
+      DWORD dde = 0;
+      HCONV conversation;
+      HSZ progman;
+      char add_item[MAX_PATH*2 + 100];
+
+      DdeInitialize (&dde, (PFNCALLBACK) DdeCallback, APPCMD_CLIENTONLY, 0);
+      progman = DdeCreateStringHandle (dde, "PROGMAN", CP_WINANSI);
+      conversation = DdeConnect (dde, progman, progman, NULL);
+      if (conversation)
     {
       DdeCommand ("[CreateGroup (\"Gnu Emacs\")]");
       DdeCommand ("[ReplaceItem (Emacs)]");
-      if (argc > 2)
-       sprintf (additem, "[AddItem (\"%s\\bin\\%s\", Emacs, \"%s\")]",
-                emacs_path, prog_name, argv[2]);
-      else
-       sprintf (additem, "[AddItem (\"%s\\bin\\%s\", Emacs)]",
+         sprintf (add_item, "[AddItem (\"%s\\bin\\%s\", Emacs)]",
                 emacs_path, prog_name);
-      DdeCommand (additem);
+         DdeCommand (add_item);
 
-      DdeDisconnect (HConversation);
+         DdeDisconnect (conversation);
     }
 
-  DdeFreeStringHandle (idDde, ProgMan);
-
-  DdeUninitialize (idDde);
+      DdeFreeStringHandle (dde, progman);
+      DdeUninitialize (dde);
+   }
 
-  return (0);
+  return 0;
 }
 
 /* arch-tag: f923609d-b781-4ef4-abce-ca0da29cbbf0