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[Emacs-diffs] Changes to emacs/src/w32menu.c [gnus-5_10-branch]


From: Miles Bader
Subject: [Emacs-diffs] Changes to emacs/src/w32menu.c [gnus-5_10-branch]
Date: Sat, 04 Sep 2004 08:27:13 -0400

Index: emacs/src/w32menu.c
diff -c /dev/null emacs/src/w32menu.c:1.68.2.1
*** /dev/null   Sat Sep  4 12:03:41 2004
--- emacs/src/w32menu.c Sat Sep  4 12:01:19 2004
***************
*** 0 ****
--- 1,2544 ----
+ /* Menu support for GNU Emacs on the Microsoft W32 API.
+    Copyright (C) 1986,88,93,94,96,98,1999,2003  Free Software Foundation, Inc.
+ 
+ This file is part of GNU Emacs.
+ 
+ GNU Emacs is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+ 
+ GNU Emacs is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+ 
+ You should have received a copy of the GNU General Public License
+ along with GNU Emacs; see the file COPYING.  If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.  */
+ 
+ #include <config.h>
+ #include <signal.h>
+ 
+ #include <stdio.h>
+ #include "lisp.h"
+ #include "termhooks.h"
+ #include "keyboard.h"
+ #include "keymap.h"
+ #include "frame.h"
+ #include "window.h"
+ #include "blockinput.h"
+ #include "buffer.h"
+ #include "charset.h"
+ #include "coding.h"
+ 
+ /* This may include sys/types.h, and that somehow loses
+    if this is not done before the other system files.  */
+ #include "w32term.h"
+ 
+ /* Load sys/types.h if not already loaded.
+    In some systems loading it twice is suicidal.  */
+ #ifndef makedev
+ #include <sys/types.h>
+ #endif
+ 
+ #include "dispextern.h"
+ 
+ #undef HAVE_DIALOGS /* TODO: Implement native dialogs.  */
+ 
+ /******************************************************************/
+ /* Definitions copied from lwlib.h */
+ 
+ typedef void * XtPointer;
+ typedef char Boolean;
+ 
+ enum button_type
+ {
+   BUTTON_TYPE_NONE,
+   BUTTON_TYPE_TOGGLE,
+   BUTTON_TYPE_RADIO
+ };
+ 
+ /* This structure is based on the one in ../lwlib/lwlib.h, modified
+    for Windows.  */
+ typedef struct _widget_value
+ {
+   /* name of widget */
+   Lisp_Object   lname;
+   char*               name;
+   /* value (meaning depend on widget type) */
+   char*               value;
+   /* keyboard equivalent. no implications for XtTranslations */
+   Lisp_Object   lkey;
+   char*               key;
+   /* Help string or nil if none.
+      GC finds this string through the frame's menu_bar_vector
+      or through menu_items.  */
+   Lisp_Object help;
+   /* true if enabled */
+   Boolean     enabled;
+   /* true if selected */
+   Boolean     selected;
+   /* The type of a button.  */
+   enum button_type button_type;
+   /* true if menu title */
+   Boolean       title;
+ #if 0
+   /* true if was edited (maintained by get_value) */
+   Boolean     edited;
+   /* true if has changed (maintained by lw library) */
+   change_type change;
+   /* true if this widget itself has changed,
+      but not counting the other widgets found in the `next' field.  */
+   change_type   this_one_change;
+ #endif
+   /* Contents of the sub-widgets, also selected slot for checkbox */
+   struct _widget_value*       contents;
+   /* data passed to callback */
+   XtPointer   call_data;
+   /* next one in the list */
+   struct _widget_value*       next;
+ #if 0
+   /* slot for the toolkit dependent part.  Always initialize to NULL. */
+   void* toolkit_data;
+   /* tell us if we should free the toolkit data slot when freeing the
+      widget_value itself. */
+   Boolean free_toolkit_data;
+ 
+   /* we resource the widget_value structures; this points to the next
+      one on the free list if this one has been deallocated.
+    */
+   struct _widget_value *free_list;
+ #endif
+ } widget_value;
+ 
+ /* Local memory management */
+ #define local_heap (GetProcessHeap ())
+ #define local_alloc(n) (HeapAlloc (local_heap, HEAP_ZERO_MEMORY, (n)))
+ #define local_free(p) (HeapFree (local_heap, 0, ((LPVOID) (p))))
+ 
+ #define malloc_widget_value() ((widget_value *) local_alloc (sizeof 
(widget_value)))
+ #define free_widget_value(wv) (local_free ((wv)))
+ 
+ /******************************************************************/
+ 
+ #ifndef TRUE
+ #define TRUE 1
+ #define FALSE 0
+ #endif /* no TRUE */
+ 
+ static HMENU current_popup_menu;
+ 
+ void syms_of_w32menu ();
+ void globals_of_w32menu ();
+ 
+ typedef BOOL (WINAPI * GetMenuItemInfoA_Proc) (
+     IN HMENU,
+     IN UINT,
+     IN BOOL,
+     IN OUT LPMENUITEMINFOA);
+ typedef BOOL (WINAPI * SetMenuItemInfoA_Proc) (
+     IN HMENU,
+     IN UINT,
+     IN BOOL,
+     IN LPCMENUITEMINFOA);
+ typedef BOOL (WINAPI * AppendMenuW_Proc) (
+     IN HMENU,
+     IN UINT,
+     IN UINT_PTR,
+     IN LPCWSTR);
+ 
+ GetMenuItemInfoA_Proc get_menu_item_info = NULL;
+ SetMenuItemInfoA_Proc set_menu_item_info = NULL;
+ AppendMenuW_Proc unicode_append_menu = NULL;
+ 
+ Lisp_Object Vmenu_updating_frame;
+ 
+ Lisp_Object Qdebug_on_next_call;
+ 
+ extern Lisp_Object Qmenu_bar;
+ 
+ extern Lisp_Object QCtoggle, QCradio;
+ 
+ extern Lisp_Object Voverriding_local_map;
+ extern Lisp_Object Voverriding_local_map_menu_flag;
+ 
+ extern Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map;
+ 
+ extern Lisp_Object Qmenu_bar_update_hook;
+ 
+ void set_frame_menubar ();
+ 
+ static void push_menu_item P_ ((Lisp_Object, Lisp_Object, Lisp_Object,
+                               Lisp_Object, Lisp_Object, Lisp_Object,
+                               Lisp_Object, Lisp_Object));
+ #ifdef HAVE_DIALOGS
+ static Lisp_Object w32_dialog_show ();
+ #endif
+ static Lisp_Object w32_menu_show ();
+ 
+ static void keymap_panes ();
+ static void single_keymap_panes ();
+ static void single_menu_item ();
+ static void list_of_panes ();
+ static void list_of_items ();
+ void w32_free_menu_strings (HWND);
+ 
+ /* This holds a Lisp vector that holds the results of decoding
+    the keymaps or alist-of-alists that specify a menu.
+ 
+    It describes the panes and items within the panes.
+ 
+    Each pane is described by 3 elements in the vector:
+    t, the pane name, the pane's prefix key.
+    Then follow the pane's items, with 5 elements per item:
+    the item string, the enable flag, the item's value,
+    the definition, and the equivalent keyboard key's description string.
+ 
+    In some cases, multiple levels of menus may be described.
+    A single vector slot containing nil indicates the start of a submenu.
+    A single vector slot containing lambda indicates the end of a submenu.
+    The submenu follows a menu item which is the way to reach the submenu.
+ 
+    A single vector slot containing quote indicates that the
+    following items should appear on the right of a dialog box.
+ 
+    Using a Lisp vector to hold this information while we decode it
+    takes care of protecting all the data from GC.  */
+ 
+ #define MENU_ITEMS_PANE_NAME 1
+ #define MENU_ITEMS_PANE_PREFIX 2
+ #define MENU_ITEMS_PANE_LENGTH 3
+ 
+ enum menu_item_idx
+ {
+   MENU_ITEMS_ITEM_NAME = 0,
+   MENU_ITEMS_ITEM_ENABLE,
+   MENU_ITEMS_ITEM_VALUE,
+   MENU_ITEMS_ITEM_EQUIV_KEY,
+   MENU_ITEMS_ITEM_DEFINITION,
+   MENU_ITEMS_ITEM_TYPE,
+   MENU_ITEMS_ITEM_SELECTED,
+   MENU_ITEMS_ITEM_HELP,
+   MENU_ITEMS_ITEM_LENGTH
+ };
+ 
+ static Lisp_Object menu_items;
+ 
+ /* Number of slots currently allocated in menu_items.  */
+ static int menu_items_allocated;
+ 
+ /* This is the index in menu_items of the first empty slot.  */
+ static int menu_items_used;
+ 
+ /* The number of panes currently recorded in menu_items,
+    excluding those within submenus.  */
+ static int menu_items_n_panes;
+ 
+ /* Current depth within submenus.  */
+ static int menu_items_submenu_depth;
+ 
+ /* Flag which when set indicates a dialog or menu has been posted by
+    Xt on behalf of one of the widget sets.  */
+ static int popup_activated_flag;
+ 
+ static int next_menubar_widget_id;
+ 
+ /* This is set nonzero after the user activates the menu bar, and set
+    to zero again after the menu bars are redisplayed by prepare_menu_bar.
+    While it is nonzero, all calls to set_frame_menubar go deep.
+ 
+    I don't understand why this is needed, but it does seem to be
+    needed on Motif, according to Marcus Daniels <address@hidden>.  */
+ 
+ int pending_menu_activation;
+ 
+ 
+ /* Return the frame whose ->output_data.w32->menubar_widget equals
+    ID, or 0 if none.  */
+ 
+ static struct frame *
+ menubar_id_to_frame (id)
+      HMENU id;
+ {
+   Lisp_Object tail, frame;
+   FRAME_PTR f;
+ 
+   for (tail = Vframe_list; GC_CONSP (tail); tail = XCDR (tail))
+     {
+       frame = XCAR (tail);
+       if (!GC_FRAMEP (frame))
+         continue;
+       f = XFRAME (frame);
+       if (!FRAME_WINDOW_P (f))
+       continue;
+       if (f->output_data.w32->menubar_widget == id)
+       return f;
+     }
+   return 0;
+ }
+ 
+ /* Initialize the menu_items structure if we haven't already done so.
+    Also mark it as currently empty.  */
+ 
+ static void
+ init_menu_items ()
+ {
+   if (NILP (menu_items))
+     {
+       menu_items_allocated = 60;
+       menu_items = Fmake_vector (make_number (menu_items_allocated), Qnil);
+     }
+ 
+   menu_items_used = 0;
+   menu_items_n_panes = 0;
+   menu_items_submenu_depth = 0;
+ }
+ 
+ /* Call at the end of generating the data in menu_items.
+    This fills in the number of items in the last pane.  */
+ 
+ static void
+ finish_menu_items ()
+ {
+ }
+ 
+ /* Call when finished using the data for the current menu
+    in menu_items.  */
+ 
+ static void
+ discard_menu_items ()
+ {
+   /* Free the structure if it is especially large.
+      Otherwise, hold on to it, to save time.  */
+   if (menu_items_allocated > 200)
+     {
+       menu_items = Qnil;
+       menu_items_allocated = 0;
+     }
+ }
+ 
+ /* Make the menu_items vector twice as large.  */
+ 
+ static void
+ grow_menu_items ()
+ {
+   Lisp_Object old;
+   int old_size = menu_items_allocated;
+   old = menu_items;
+ 
+   menu_items_allocated *= 2;
+   menu_items = Fmake_vector (make_number (menu_items_allocated), Qnil);
+   bcopy (XVECTOR (old)->contents, XVECTOR (menu_items)->contents,
+        old_size * sizeof (Lisp_Object));
+ }
+ 
+ /* Begin a submenu.  */
+ 
+ static void
+ push_submenu_start ()
+ {
+   if (menu_items_used + 1 > menu_items_allocated)
+     grow_menu_items ();
+ 
+   ASET (menu_items, menu_items_used++, Qnil);
+   menu_items_submenu_depth++;
+ }
+ 
+ /* End a submenu.  */
+ 
+ static void
+ push_submenu_end ()
+ {
+   if (menu_items_used + 1 > menu_items_allocated)
+     grow_menu_items ();
+ 
+   ASET (menu_items, menu_items_used++, Qlambda);
+   menu_items_submenu_depth--;
+ }
+ 
+ /* Indicate boundary between left and right.  */
+ 
+ static void
+ push_left_right_boundary ()
+ {
+   if (menu_items_used + 1 > menu_items_allocated)
+     grow_menu_items ();
+ 
+   ASET (menu_items, menu_items_used++, Qquote);
+ }
+ 
+ /* Start a new menu pane in menu_items.
+    NAME is the pane name.  PREFIX_VEC is a prefix key for this pane.  */
+ 
+ static void
+ push_menu_pane (name, prefix_vec)
+      Lisp_Object name, prefix_vec;
+ {
+   if (menu_items_used + MENU_ITEMS_PANE_LENGTH > menu_items_allocated)
+     grow_menu_items ();
+ 
+   if (menu_items_submenu_depth == 0)
+     menu_items_n_panes++;
+   ASET (menu_items, menu_items_used++, Qt);
+   ASET (menu_items, menu_items_used++, name);
+   ASET (menu_items, menu_items_used++, prefix_vec);
+ }
+ 
+ /* Push one menu item into the current pane.  NAME is the string to
+    display.  ENABLE if non-nil means this item can be selected.  KEY
+    is the key generated by choosing this item, or nil if this item
+    doesn't really have a definition.  DEF is the definition of this
+    item.  EQUIV is the textual description of the keyboard equivalent
+    for this item (or nil if none).  TYPE is the type of this menu
+    item, one of nil, `toggle' or `radio'. */
+ 
+ static void
+ push_menu_item (name, enable, key, def, equiv, type, selected, help)
+      Lisp_Object name, enable, key, def, equiv, type, selected, help;
+ {
+   if (menu_items_used + MENU_ITEMS_ITEM_LENGTH > menu_items_allocated)
+     grow_menu_items ();
+ 
+   ASET (menu_items, menu_items_used++, name);
+   ASET (menu_items, menu_items_used++, enable);
+   ASET (menu_items, menu_items_used++, key);
+   ASET (menu_items, menu_items_used++, equiv);
+   ASET (menu_items, menu_items_used++, def);
+   ASET (menu_items, menu_items_used++, type);
+   ASET (menu_items, menu_items_used++, selected);
+   ASET (menu_items, menu_items_used++, help);
+ }
+ 
+ /* Look through KEYMAPS, a vector of keymaps that is NMAPS long,
+    and generate menu panes for them in menu_items.
+    If NOTREAL is nonzero,
+    don't bother really computing whether an item is enabled.  */
+ 
+ static void
+ keymap_panes (keymaps, nmaps, notreal)
+      Lisp_Object *keymaps;
+      int nmaps;
+      int notreal;
+ {
+   int mapno;
+ 
+   init_menu_items ();
+ 
+   /* Loop over the given keymaps, making a pane for each map.
+      But don't make a pane that is empty--ignore that map instead.
+      P is the number of panes we have made so far.  */
+   for (mapno = 0; mapno < nmaps; mapno++)
+     single_keymap_panes (keymaps[mapno],
+                          Fkeymap_prompt (keymaps[mapno]), Qnil, notreal, 10);
+ 
+   finish_menu_items ();
+ }
+ 
+ /* This is a recursive subroutine of keymap_panes.
+    It handles one keymap, KEYMAP.
+    The other arguments are passed along
+    or point to local variables of the previous function.
+    If NOTREAL is nonzero, only check for equivalent key bindings, don't
+    evaluate expressions in menu items and don't make any menu.
+ 
+    If we encounter submenus deeper than MAXDEPTH levels, ignore them.  */
+ 
+ static void
+ single_keymap_panes (keymap, pane_name, prefix, notreal, maxdepth)
+      Lisp_Object keymap;
+      Lisp_Object pane_name;
+      Lisp_Object prefix;
+      int notreal;
+      int maxdepth;
+ {
+   Lisp_Object pending_maps = Qnil;
+   Lisp_Object tail, item;
+   struct gcpro gcpro1, gcpro2;
+ 
+   if (maxdepth <= 0)
+     return;
+ 
+   push_menu_pane (pane_name, prefix);
+ 
+   for (tail = keymap; CONSP (tail); tail = XCDR (tail))
+     {
+       GCPRO2 (keymap, pending_maps);
+       /* Look at each key binding, and if it is a menu item add it
+        to this menu.  */
+       item = XCAR (tail);
+       if (CONSP (item))
+       single_menu_item (XCAR (item), XCDR (item),
+                         &pending_maps, notreal, maxdepth);
+       else if (VECTORP (item))
+       {
+         /* Loop over the char values represented in the vector.  */
+         int len = ASIZE (item);
+         int c;
+         for (c = 0; c < len; c++)
+           {
+             Lisp_Object character;
+             XSETFASTINT (character, c);
+             single_menu_item (character, AREF (item, c),
+                               &pending_maps, notreal, maxdepth);
+           }
+       }
+       UNGCPRO;
+     }
+ 
+   /* Process now any submenus which want to be panes at this level.  */
+   while (!NILP (pending_maps))
+     {
+       Lisp_Object elt, eltcdr, string;
+       elt = Fcar (pending_maps);
+       eltcdr = XCDR (elt);
+       string = XCAR (eltcdr);
+       /* We no longer discard the @ from the beginning of the string here.
+        Instead, we do this in w32_menu_show.  */
+       single_keymap_panes (Fcar (elt), string,
+                          XCDR (eltcdr), notreal, maxdepth - 1);
+       pending_maps = Fcdr (pending_maps);
+     }
+ }
+ 
+ /* This is a subroutine of single_keymap_panes that handles one
+    keymap entry.
+    KEY is a key in a keymap and ITEM is its binding.
+    PENDING_MAPS_PTR points to a list of keymaps waiting to be made into
+    separate panes.
+    If NOTREAL is nonzero, only check for equivalent key bindings, don't
+    evaluate expressions in menu items and don't make any menu.
+    If we encounter submenus deeper than MAXDEPTH levels, ignore them.  */
+ 
+ static void
+ single_menu_item (key, item, pending_maps_ptr, notreal, maxdepth)
+      Lisp_Object key, item;
+      Lisp_Object *pending_maps_ptr;
+      int maxdepth, notreal;
+ {
+   Lisp_Object map, item_string, enabled;
+   struct gcpro gcpro1, gcpro2;
+   int res;
+ 
+   /* Parse the menu item and leave the result in item_properties.  */
+   GCPRO2 (key, item);
+   res = parse_menu_item (item, notreal, 0);
+   UNGCPRO;
+   if (!res)
+     return;                   /* Not a menu item.  */
+ 
+   map = AREF (item_properties, ITEM_PROPERTY_MAP);
+ 
+   if (notreal)
+     {
+       /* We don't want to make a menu, just traverse the keymaps to
+        precompute equivalent key bindings.  */
+       if (!NILP (map))
+       single_keymap_panes (map, Qnil, key, 1, maxdepth - 1);
+       return;
+     }
+ 
+   enabled = AREF (item_properties, ITEM_PROPERTY_ENABLE);
+   item_string = AREF (item_properties, ITEM_PROPERTY_NAME);
+ 
+   if (!NILP (map) && SREF (item_string, 0) == '@')
+     {
+       if (!NILP (enabled))
+       /* An enabled separate pane. Remember this to handle it later.  */
+       *pending_maps_ptr = Fcons (Fcons (map, Fcons (item_string, key)),
+                                  *pending_maps_ptr);
+       return;
+     }
+ 
+   push_menu_item (item_string, enabled, key,
+                 AREF (item_properties, ITEM_PROPERTY_DEF),
+                 AREF (item_properties, ITEM_PROPERTY_KEYEQ),
+                 AREF (item_properties, ITEM_PROPERTY_TYPE),
+                   AREF (item_properties, ITEM_PROPERTY_SELECTED),
+                   AREF (item_properties, ITEM_PROPERTY_HELP));
+ 
+   /* Display a submenu using the toolkit.  */
+   if (! (NILP (map) || NILP (enabled)))
+     {
+       push_submenu_start ();
+       single_keymap_panes (map, Qnil, key, 0, maxdepth - 1);
+       push_submenu_end ();
+     }
+ }
+ 
+ /* Push all the panes and items of a menu described by the
+    alist-of-alists MENU.
+    This handles old-fashioned calls to x-popup-menu.  */
+ 
+ static void
+ list_of_panes (menu)
+      Lisp_Object menu;
+ {
+   Lisp_Object tail;
+ 
+   init_menu_items ();
+ 
+   for (tail = menu; !NILP (tail); tail = Fcdr (tail))
+     {
+       Lisp_Object elt, pane_name, pane_data;
+       elt = Fcar (tail);
+       pane_name = Fcar (elt);
+       CHECK_STRING (pane_name);
+       push_menu_pane (pane_name, Qnil);
+       pane_data = Fcdr (elt);
+       CHECK_CONS (pane_data);
+       list_of_items (pane_data);
+     }
+ 
+   finish_menu_items ();
+ }
+ 
+ /* Push the items in a single pane defined by the alist PANE.  */
+ 
+ static void
+ list_of_items (pane)
+      Lisp_Object pane;
+ {
+   Lisp_Object tail, item, item1;
+ 
+   for (tail = pane; !NILP (tail); tail = Fcdr (tail))
+     {
+       item = Fcar (tail);
+       if (STRINGP (item))
+       push_menu_item (item, Qnil, Qnil, Qt, Qnil, Qnil, Qnil, Qnil);
+       else if (NILP (item))
+       push_left_right_boundary ();
+       else
+       {
+         CHECK_CONS (item);
+         item1 = Fcar (item);
+         CHECK_STRING (item1);
+         push_menu_item (item1, Qt, Fcdr (item), Qt, Qnil, Qnil, Qnil, Qnil);
+       }
+     }
+ }
+ 
+ DEFUN ("x-popup-menu", Fx_popup_menu, Sx_popup_menu, 2, 2, 0,
+        doc: /* Pop up a deck-of-cards menu and return user's selection.
+ POSITION is a position specification.  This is either a mouse button
+ event or a list ((XOFFSET YOFFSET) WINDOW) where XOFFSET and YOFFSET
+ are positions in pixels from the top left corner of WINDOW's frame
+ \(WINDOW may be a frame object instead of a window).  This controls the
+ position of the center of the first line in the first pane of the
+ menu, not the top left of the menu as a whole.  If POSITION is t, it
+ means to use the current mouse position.
+ 
+ MENU is a specifier for a menu.  For the simplest case, MENU is a keymap.
+ The menu items come from key bindings that have a menu string as well as
+ a definition; actually, the \"definition\" in such a key binding looks like
+ \(STRING . REAL-DEFINITION).  To give the menu a title, put a string into
+ the keymap as a top-level element.
+ 
+ If REAL-DEFINITION is nil, that puts a nonselectable string in the menu.
+ Otherwise, REAL-DEFINITION should be a valid key binding definition.
+ 
+ You can also use a list of keymaps as MENU.  Then each keymap makes a
+ separate pane.  When MENU is a keymap or a list of keymaps, the return
+ value is a list of events.
+ 
+ Alternatively, you can specify a menu of multiple panes with a list of
+ the form (TITLE PANE1 PANE2...), where each pane is a list of
+ form (TITLE ITEM1 ITEM2...).
+ Each ITEM is normally a cons cell (STRING . VALUE); but a string can
+ appear as an item--that makes a nonselectable line in the menu.
+ With this form of menu, the return value is VALUE from the chosen item.
+ 
+ If POSITION is nil, don't display the menu at all, just precalculate the
+ cached information about equivalent key sequences.  */)
+   (position, menu)
+      Lisp_Object position, menu;
+ {
+   Lisp_Object keymap, tem;
+   int xpos = 0, ypos = 0;
+   Lisp_Object title;
+   char *error_name;
+   Lisp_Object selection;
+   FRAME_PTR f = NULL;
+   Lisp_Object x, y, window;
+   int keymaps = 0;
+   int for_click = 0;
+   struct gcpro gcpro1;
+ 
+ #ifdef HAVE_MENUS
+   if (! NILP (position))
+     {
+       check_w32 ();
+ 
+       /* Decode the first argument: find the window and the coordinates.  */
+       if (EQ (position, Qt)
+         || (CONSP (position) && (EQ (XCAR (position), Qmenu_bar)
+                                    || EQ (XCAR (position), Qtool_bar))))
+       {
+         /* Use the mouse's current position.  */
+         FRAME_PTR new_f = SELECTED_FRAME ();
+         Lisp_Object bar_window;
+         enum scroll_bar_part part;
+         unsigned long time;
+ 
+         if (mouse_position_hook)
+           (*mouse_position_hook) (&new_f, 1, &bar_window,
+                                   &part, &x, &y, &time);
+         if (new_f != 0)
+           XSETFRAME (window, new_f);
+         else
+           {
+             window = selected_window;
+             XSETFASTINT (x, 0);
+             XSETFASTINT (y, 0);
+           }
+       }
+       else
+       {
+         tem = Fcar (position);
+         if (CONSP (tem))
+           {
+             window = Fcar (Fcdr (position));
+             x = Fcar (tem);
+             y = Fcar (Fcdr (tem));
+           }
+         else
+           {
+             for_click = 1;
+             tem = Fcar (Fcdr (position));  /* EVENT_START (position) */
+             window = Fcar (tem);           /* POSN_WINDOW (tem) */
+             tem = Fcar (Fcdr (Fcdr (tem))); /* POSN_WINDOW_POSN (tem) */
+             x = Fcar (tem);
+             y = Fcdr (tem);
+           }
+       }
+ 
+       CHECK_NUMBER (x);
+       CHECK_NUMBER (y);
+ 
+       /* Decode where to put the menu.  */
+ 
+       if (FRAMEP (window))
+       {
+         f = XFRAME (window);
+         xpos = 0;
+         ypos = 0;
+       }
+       else if (WINDOWP (window))
+       {
+         CHECK_LIVE_WINDOW (window);
+         f = XFRAME (WINDOW_FRAME (XWINDOW (window)));
+ 
+         xpos = WINDOW_LEFT_EDGE_X (XWINDOW (window));
+         ypos = WINDOW_TOP_EDGE_Y (XWINDOW (window));
+       }
+       else
+       /* ??? Not really clean; should be CHECK_WINDOW_OR_FRAME,
+          but I don't want to make one now.  */
+       CHECK_WINDOW (window);
+ 
+       xpos += XINT (x);
+       ypos += XINT (y);
+ 
+       XSETFRAME (Vmenu_updating_frame, f);
+     }
+   Vmenu_updating_frame = Qnil;
+ #endif /* HAVE_MENUS */
+ 
+   title = Qnil;
+   GCPRO1 (title);
+ 
+   /* Decode the menu items from what was specified.  */
+ 
+   keymap = get_keymap (menu, 0, 0);
+   if (CONSP (keymap))
+     {
+       /* We were given a keymap.  Extract menu info from the keymap.  */
+       Lisp_Object prompt;
+ 
+       /* Extract the detailed info to make one pane.  */
+       keymap_panes (&menu, 1, NILP (position));
+ 
+       /* Search for a string appearing directly as an element of the keymap.
+        That string is the title of the menu.  */
+       prompt = Fkeymap_prompt (keymap);
+       if (NILP (title) && !NILP (prompt))
+       title = prompt;
+ 
+       /* Make that be the pane title of the first pane.  */
+       if (!NILP (prompt) && menu_items_n_panes >= 0)
+       ASET (menu_items, MENU_ITEMS_PANE_NAME, prompt);
+ 
+       keymaps = 1;
+     }
+   else if (CONSP (menu) && KEYMAPP (XCAR (menu)))
+     {
+       /* We were given a list of keymaps.  */
+       int nmaps = XFASTINT (Flength (menu));
+       Lisp_Object *maps
+       = (Lisp_Object *) alloca (nmaps * sizeof (Lisp_Object));
+       int i;
+ 
+       title = Qnil;
+ 
+       /* The first keymap that has a prompt string
+        supplies the menu title.  */
+       for (tem = menu, i = 0; CONSP (tem); tem = Fcdr (tem))
+       {
+         Lisp_Object prompt;
+ 
+         maps[i++] = keymap = get_keymap (Fcar (tem), 1, 0);
+ 
+         prompt = Fkeymap_prompt (keymap);
+         if (NILP (title) && !NILP (prompt))
+           title = prompt;
+       }
+ 
+       /* Extract the detailed info to make one pane.  */
+       keymap_panes (maps, nmaps, NILP (position));
+ 
+       /* Make the title be the pane title of the first pane.  */
+       if (!NILP (title) && menu_items_n_panes >= 0)
+       ASET (menu_items, MENU_ITEMS_PANE_NAME, title);
+ 
+       keymaps = 1;
+     }
+   else
+     {
+       /* We were given an old-fashioned menu.  */
+       title = Fcar (menu);
+       CHECK_STRING (title);
+ 
+       list_of_panes (Fcdr (menu));
+ 
+       keymaps = 0;
+     }
+ 
+   if (NILP (position))
+     {
+       discard_menu_items ();
+       UNGCPRO;
+       return Qnil;
+     }
+ 
+ #ifdef HAVE_MENUS
+   /* If resources from a previous popup menu exist yet, does nothing
+      until the `menu_free_timer' has freed them (see w32fns.c).
+   */
+   if (current_popup_menu)
+     {
+       discard_menu_items ();
+       UNGCPRO;
+       return Qnil;
+     }
+ 
+   /* Display them in a menu.  */
+   BLOCK_INPUT;
+ 
+   selection = w32_menu_show (f, xpos, ypos, for_click,
+                            keymaps, title, &error_name);
+   UNBLOCK_INPUT;
+ 
+   discard_menu_items ();
+ #endif /* HAVE_MENUS */
+ 
+   UNGCPRO;
+ 
+   if (error_name) error (error_name);
+   return selection;
+ }
+ 
+ #ifdef HAVE_MENUS
+ 
+ DEFUN ("x-popup-dialog", Fx_popup_dialog, Sx_popup_dialog, 2, 2, 0,
+        doc: /* Pop up a dialog box and return user's selection.
+ POSITION specifies which frame to use.
+ This is normally a mouse button event or a window or frame.
+ If POSITION is t, it means to use the frame the mouse is on.
+ The dialog box appears in the middle of the specified frame.
+ 
+ CONTENTS specifies the alternatives to display in the dialog box.
+ It is a list of the form (TITLE ITEM1 ITEM2...).
+ Each ITEM is a cons cell (STRING . VALUE).
+ The return value is VALUE from the chosen item.
+ 
+ An ITEM may also be just a string--that makes a nonselectable item.
+ An ITEM may also be nil--that means to put all preceding items
+ on the left of the dialog box and all following items on the right.
+ \(By default, approximately half appear on each side.)  */)
+   (position, contents)
+      Lisp_Object position, contents;
+ {
+   FRAME_PTR f = NULL;
+   Lisp_Object window;
+ 
+   check_w32 ();
+ 
+   /* Decode the first argument: find the window or frame to use.  */
+   if (EQ (position, Qt)
+       || (CONSP (position) && (EQ (XCAR (position), Qmenu_bar)
+                                || EQ (XCAR (position), Qtool_bar))))
+     {
+ #if 0 /* Using the frame the mouse is on may not be right.  */
+       /* Use the mouse's current position.  */
+       FRAME_PTR new_f = SELECTED_FRAME ();
+       Lisp_Object bar_window;
+       enum scroll_bar_part part;
+       unsigned long time;
+       Lisp_Object x, y;
+ 
+       (*mouse_position_hook) (&new_f, 1, &bar_window, &part, &x, &y, &time);
+ 
+       if (new_f != 0)
+       XSETFRAME (window, new_f);
+       else
+       window = selected_window;
+ #endif
+       window = selected_window;
+     }
+   else if (CONSP (position))
+     {
+       Lisp_Object tem;
+       tem = Fcar (position);
+       if (CONSP (tem))
+       window = Fcar (Fcdr (position));
+       else
+       {
+         tem = Fcar (Fcdr (position));  /* EVENT_START (position) */
+         window = Fcar (tem);       /* POSN_WINDOW (tem) */
+       }
+     }
+   else if (WINDOWP (position) || FRAMEP (position))
+     window = position;
+   else
+     window = Qnil;
+ 
+   /* Decode where to put the menu.  */
+ 
+   if (FRAMEP (window))
+     f = XFRAME (window);
+   else if (WINDOWP (window))
+     {
+       CHECK_LIVE_WINDOW (window);
+       f = XFRAME (WINDOW_FRAME (XWINDOW (window)));
+     }
+   else
+     /* ??? Not really clean; should be CHECK_WINDOW_OR_FRAME,
+        but I don't want to make one now.  */
+     CHECK_WINDOW (window);
+ 
+ #ifndef HAVE_DIALOGS
+   /* Display a menu with these alternatives
+      in the middle of frame F.  */
+   {
+     Lisp_Object x, y, frame, newpos;
+     XSETFRAME (frame, f);
+     XSETINT (x, x_pixel_width (f) / 2);
+     XSETINT (y, x_pixel_height (f) / 2);
+     newpos = Fcons (Fcons (x, Fcons (y, Qnil)), Fcons (frame, Qnil));
+ 
+     return Fx_popup_menu (newpos,
+                         Fcons (Fcar (contents), Fcons (contents, Qnil)));
+   }
+ #else /* HAVE_DIALOGS */
+   {
+     Lisp_Object title;
+     char *error_name;
+     Lisp_Object selection;
+ 
+     /* Decode the dialog items from what was specified.  */
+     title = Fcar (contents);
+     CHECK_STRING (title);
+ 
+     list_of_panes (Fcons (contents, Qnil));
+ 
+     /* Display them in a dialog box.  */
+     BLOCK_INPUT;
+     selection = w32_dialog_show (f, 0, title, &error_name);
+     UNBLOCK_INPUT;
+ 
+     discard_menu_items ();
+ 
+     if (error_name) error (error_name);
+     return selection;
+   }
+ #endif /* HAVE_DIALOGS */
+ }
+ 
+ /* Activate the menu bar of frame F.
+    This is called from keyboard.c when it gets the
+    MENU_BAR_ACTIVATE_EVENT out of the Emacs event queue.
+ 
+    To activate the menu bar, we signal to the input thread that it can
+    return from the WM_INITMENU message, allowing the normal Windows
+    processing of the menus.
+ 
+    But first we recompute the menu bar contents (the whole tree).
+ 
+    This way we can safely execute Lisp code.  */
+ 
+ void
+ x_activate_menubar (f)
+      FRAME_PTR f;
+ {
+   set_frame_menubar (f, 0, 1);
+ 
+   /* Lock out further menubar changes while active.  */
+   f->output_data.w32->menubar_active = 1;
+ 
+   /* Signal input thread to return from WM_INITMENU.  */
+   complete_deferred_msg (FRAME_W32_WINDOW (f), WM_INITMENU, 0);
+ }
+ 
+ /* This callback is called from the menu bar pulldown menu
+    when the user makes a selection.
+    Figure out what the user chose
+    and put the appropriate events into the keyboard buffer.  */
+ 
+ void
+ menubar_selection_callback (FRAME_PTR f, void * client_data)
+ {
+   Lisp_Object prefix, entry;
+   Lisp_Object vector;
+   Lisp_Object *subprefix_stack;
+   int submenu_depth = 0;
+   int i;
+ 
+   if (!f)
+     return;
+   entry = Qnil;
+   subprefix_stack = (Lisp_Object *) alloca (f->menu_bar_items_used * sizeof 
(Lisp_Object));
+   vector = f->menu_bar_vector;
+   prefix = Qnil;
+   i = 0;
+   while (i < f->menu_bar_items_used)
+     {
+       if (EQ (AREF (vector, i), Qnil))
+       {
+         subprefix_stack[submenu_depth++] = prefix;
+         prefix = entry;
+         i++;
+       }
+       else if (EQ (AREF (vector, i), Qlambda))
+       {
+         prefix = subprefix_stack[--submenu_depth];
+         i++;
+       }
+       else if (EQ (AREF (vector, i), Qt))
+       {
+         prefix = AREF (vector, i + MENU_ITEMS_PANE_PREFIX);
+         i += MENU_ITEMS_PANE_LENGTH;
+       }
+       else
+       {
+         entry = AREF (vector, i + MENU_ITEMS_ITEM_VALUE);
+         /* The EMACS_INT cast avoids a warning.  There's no problem
+            as long as pointers have enough bits to hold small integers.  */
+         if ((int) (EMACS_INT) client_data == i)
+           {
+             int j;
+             struct input_event buf;
+             Lisp_Object frame;
+             EVENT_INIT (buf);
+ 
+             XSETFRAME (frame, f);
+             buf.kind = MENU_BAR_EVENT;
+             buf.frame_or_window = frame;
+             buf.arg = frame;
+             kbd_buffer_store_event (&buf);
+ 
+             for (j = 0; j < submenu_depth; j++)
+               if (!NILP (subprefix_stack[j]))
+                 {
+                   buf.kind = MENU_BAR_EVENT;
+                   buf.frame_or_window = frame;
+                   buf.arg = subprefix_stack[j];
+                   kbd_buffer_store_event (&buf);
+                 }
+ 
+             if (!NILP (prefix))
+               {
+                 buf.kind = MENU_BAR_EVENT;
+                 buf.frame_or_window = frame;
+                 buf.arg = prefix;
+                 kbd_buffer_store_event (&buf);
+               }
+ 
+             buf.kind = MENU_BAR_EVENT;
+             buf.frame_or_window = frame;
+             buf.arg = entry;
+             kbd_buffer_store_event (&buf);
+ 
+             /* Free memory used by owner-drawn and help-echo strings.  */
+             w32_free_menu_strings (FRAME_W32_WINDOW (f));
+             f->output_data.w32->menu_command_in_progress = 0;
+             f->output_data.w32->menubar_active = 0;
+             return;
+           }
+         i += MENU_ITEMS_ITEM_LENGTH;
+       }
+     }
+   /* Free memory used by owner-drawn and help-echo strings.  */
+   w32_free_menu_strings (FRAME_W32_WINDOW (f));
+   f->output_data.w32->menu_command_in_progress = 0;
+   f->output_data.w32->menubar_active = 0;
+ }
+ 
+ /* Allocate a widget_value, blocking input.  */
+ 
+ widget_value *
+ xmalloc_widget_value ()
+ {
+   widget_value *value;
+ 
+   BLOCK_INPUT;
+   value = malloc_widget_value ();
+   UNBLOCK_INPUT;
+ 
+   return value;
+ }
+ 
+ /* This recursively calls free_widget_value on the tree of widgets.
+    It must free all data that was malloc'ed for these widget_values.
+    In Emacs, many slots are pointers into the data of Lisp_Strings, and
+    must be left alone.  */
+ 
+ void
+ free_menubar_widget_value_tree (wv)
+      widget_value *wv;
+ {
+   if (! wv) return;
+ 
+   wv->name = wv->value = wv->key = (char *) 0xDEADBEEF;
+ 
+   if (wv->contents && (wv->contents != (widget_value*)1))
+     {
+       free_menubar_widget_value_tree (wv->contents);
+       wv->contents = (widget_value *) 0xDEADBEEF;
+     }
+   if (wv->next)
+     {
+       free_menubar_widget_value_tree (wv->next);
+       wv->next = (widget_value *) 0xDEADBEEF;
+     }
+   BLOCK_INPUT;
+   free_widget_value (wv);
+   UNBLOCK_INPUT;
+ }
+ 
+ /* Set up data i menu_items for a menu bar item
+    whose event type is ITEM_KEY (with string ITEM_NAME)
+    and whose contents come from the list of keymaps MAPS.  */
+ 
+ static int
+ parse_single_submenu (item_key, item_name, maps)
+      Lisp_Object item_key, item_name, maps;
+ {
+   Lisp_Object length;
+   int len;
+   Lisp_Object *mapvec;
+   int i;
+   int top_level_items = 0;
+ 
+   length = Flength (maps);
+   len = XINT (length);
+ 
+   /* Convert the list MAPS into a vector MAPVEC.  */
+   mapvec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
+   for (i = 0; i < len; i++)
+     {
+       mapvec[i] = Fcar (maps);
+       maps = Fcdr (maps);
+     }
+ 
+   /* Loop over the given keymaps, making a pane for each map.
+      But don't make a pane that is empty--ignore that map instead.  */
+   for (i = 0; i < len; i++)
+     {
+       if (SYMBOLP (mapvec[i])
+         || (CONSP (mapvec[i]) && !KEYMAPP (mapvec[i])))
+       {
+         /* Here we have a command at top level in the menu bar
+            as opposed to a submenu.  */
+         top_level_items = 1;
+         push_menu_pane (Qnil, Qnil);
+         push_menu_item (item_name, Qt, item_key, mapvec[i],
+                           Qnil, Qnil, Qnil, Qnil);
+       }
+       else
+       {
+         Lisp_Object prompt;
+         prompt = Fkeymap_prompt (mapvec[i]);
+         single_keymap_panes (mapvec[i],
+                              !NILP (prompt) ? prompt : item_name,
+                              item_key, 0, 10);
+       }
+     }
+ 
+   return top_level_items;
+ }
+ 
+ 
+ /* Create a tree of widget_value objects
+    representing the panes and items
+    in menu_items starting at index START, up to index END.  */
+ 
+ static widget_value *
+ digest_single_submenu (start, end, top_level_items)
+      int start, end, top_level_items;
+ {
+   widget_value *wv, *prev_wv, *save_wv, *first_wv;
+   int i;
+   int submenu_depth = 0;
+   widget_value **submenu_stack;
+ 
+   submenu_stack
+     = (widget_value **) alloca (menu_items_used * sizeof (widget_value *));
+   wv = xmalloc_widget_value ();
+   wv->name = "menu";
+   wv->value = 0;
+   wv->enabled = 1;
+   wv->button_type = BUTTON_TYPE_NONE;
+   wv->help = Qnil;
+   first_wv = wv;
+   save_wv = 0;
+   prev_wv = 0;
+ 
+   /* Loop over all panes and items made by the preceding call
+      to parse_single_submenu and construct a tree of widget_value objects.
+      Ignore the panes and items used by previous calls to
+      digest_single_submenu, even though those are also in menu_items.  */
+   i = start;
+   while (i < end)
+     {
+       if (EQ (AREF (menu_items, i), Qnil))
+       {
+         submenu_stack[submenu_depth++] = save_wv;
+         save_wv = prev_wv;
+         prev_wv = 0;
+         i++;
+       }
+       else if (EQ (AREF (menu_items, i), Qlambda))
+       {
+         prev_wv = save_wv;
+         save_wv = submenu_stack[--submenu_depth];
+         i++;
+       }
+       else if (EQ (AREF (menu_items, i), Qt)
+              && submenu_depth != 0)
+       i += MENU_ITEMS_PANE_LENGTH;
+       /* Ignore a nil in the item list.
+        It's meaningful only for dialog boxes.  */
+       else if (EQ (AREF (menu_items, i), Qquote))
+       i += 1;
+       else if (EQ (AREF (menu_items, i), Qt))
+       {
+         /* Create a new pane.  */
+         Lisp_Object pane_name, prefix;
+         char *pane_string;
+ 
+         pane_name = AREF (menu_items, i + MENU_ITEMS_PANE_NAME);
+         prefix = AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);
+ 
+         if (STRINGP (pane_name))
+           {
+             if (unicode_append_menu)
+               /* Encode as UTF-8 for now.  */
+               pane_name = ENCODE_UTF_8 (pane_name);
+             else if (STRING_MULTIBYTE (pane_name))
+               pane_name = ENCODE_SYSTEM (pane_name);
+ 
+             ASET (menu_items, i + MENU_ITEMS_PANE_NAME, pane_name);
+           }
+ 
+         pane_string = (NILP (pane_name)
+                        ? "" : (char *) SDATA (pane_name));
+         /* If there is just one top-level pane, put all its items directly
+            under the top-level menu.  */
+         if (menu_items_n_panes == 1)
+           pane_string = "";
+ 
+         /* If the pane has a meaningful name,
+            make the pane a top-level menu item
+            with its items as a submenu beneath it.  */
+         if (strcmp (pane_string, ""))
+           {
+             wv = xmalloc_widget_value ();
+             if (save_wv)
+               save_wv->next = wv;
+             else
+               first_wv->contents = wv;
+             wv->lname = pane_name;
+             /* Set value to 1 so update_submenu_strings can handle '@'  */
+             wv->value = (char *) 1;
+             wv->enabled = 1;
+             wv->button_type = BUTTON_TYPE_NONE;
+             wv->help = Qnil;
+           }
+         save_wv = wv;
+         prev_wv = 0;
+         i += MENU_ITEMS_PANE_LENGTH;
+       }
+       else
+       {
+         /* Create a new item within current pane.  */
+         Lisp_Object item_name, enable, descrip, def, type, selected;
+           Lisp_Object help;
+ 
+         item_name = AREF (menu_items, i + MENU_ITEMS_ITEM_NAME);
+         enable = AREF (menu_items, i + MENU_ITEMS_ITEM_ENABLE);
+         descrip = AREF (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY);
+         def = AREF (menu_items, i + MENU_ITEMS_ITEM_DEFINITION);
+         type = AREF (menu_items, i + MENU_ITEMS_ITEM_TYPE);
+         selected = AREF (menu_items, i + MENU_ITEMS_ITEM_SELECTED);
+         help = AREF (menu_items, i + MENU_ITEMS_ITEM_HELP);
+ 
+         if (STRINGP (item_name))
+           {
+             if (unicode_append_menu)
+               item_name = ENCODE_UTF_8 (item_name);
+             else if (STRING_MULTIBYTE (item_name))
+               item_name = ENCODE_SYSTEM (item_name);
+ 
+             ASET (menu_items, i + MENU_ITEMS_ITEM_NAME, item_name);
+           }
+ 
+         if (STRINGP (descrip) && STRING_MULTIBYTE (descrip))
+           {
+             descrip = ENCODE_SYSTEM (descrip);
+             ASET (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY, descrip);
+           }
+ 
+         wv = xmalloc_widget_value ();
+         if (prev_wv)
+           prev_wv->next = wv;
+         else
+           save_wv->contents = wv;
+ 
+         wv->lname = item_name;
+         if (!NILP (descrip))
+           wv->lkey = descrip;
+         wv->value = 0;
+         /* The EMACS_INT cast avoids a warning.  There's no problem
+            as long as pointers have enough bits to hold small integers.  */
+         wv->call_data = (!NILP (def) ? (void *) (EMACS_INT) i : 0);
+         wv->enabled = !NILP (enable);
+ 
+         if (NILP (type))
+           wv->button_type = BUTTON_TYPE_NONE;
+         else if (EQ (type, QCradio))
+           wv->button_type = BUTTON_TYPE_RADIO;
+         else if (EQ (type, QCtoggle))
+           wv->button_type = BUTTON_TYPE_TOGGLE;
+         else
+           abort ();
+ 
+         wv->selected = !NILP (selected);
+         if (!STRINGP (help))
+           help = Qnil;
+ 
+         wv->help = help;
+ 
+         prev_wv = wv;
+ 
+         i += MENU_ITEMS_ITEM_LENGTH;
+       }
+     }
+ 
+   /* If we have just one "menu item"
+      that was originally a button, return it by itself.  */
+   if (top_level_items && first_wv->contents && first_wv->contents->next == 0)
+     {
+       wv = first_wv->contents;
+       free_widget_value (first_wv);
+       return wv;
+     }
+ 
+   return first_wv;
+ }
+ 
+ 
+ /* Walk through the widget_value tree starting at FIRST_WV and update
+    the char * pointers from the corresponding lisp values.
+    We do this after building the whole tree, since GC may happen while the
+    tree is constructed, and small strings are relocated.  So we must wait
+    until no GC can happen before storing pointers into lisp values.  */
+ static void
+ update_submenu_strings (first_wv)
+      widget_value *first_wv;
+ {
+   widget_value *wv;
+ 
+   for (wv = first_wv; wv; wv = wv->next)
+     {
+       if (wv->lname && ! NILP (wv->lname))
+         {
+           wv->name = SDATA (wv->lname);
+ 
+           /* Ignore the @ that means "separate pane".
+              This is a kludge, but this isn't worth more time.  */
+           if (wv->value == (char *)1)
+             {
+               if (wv->name[0] == '@')
+               wv->name++;
+               wv->value = 0;
+             }
+         }
+ 
+       if (wv->lkey && ! NILP (wv->lkey))
+         wv->key = SDATA (wv->lkey);
+ 
+       if (wv->contents)
+         update_submenu_strings (wv->contents);
+     }
+ }
+ 
+ 
+ /* Set the contents of the menubar widgets of frame F.
+    The argument FIRST_TIME is currently ignored;
+    it is set the first time this is called, from initialize_frame_menubar.  */
+ 
+ void
+ set_frame_menubar (f, first_time, deep_p)
+      FRAME_PTR f;
+      int first_time;
+      int deep_p;
+ {
+   HMENU menubar_widget = f->output_data.w32->menubar_widget;
+   Lisp_Object items;
+   widget_value *wv, *first_wv, *prev_wv = 0;
+   int i, last_i;
+   int *submenu_start, *submenu_end;
+   int *submenu_top_level_items, *submenu_n_panes;
+ 
+   /* We must not change the menubar when actually in use.  */
+   if (f->output_data.w32->menubar_active)
+     return;
+ 
+   XSETFRAME (Vmenu_updating_frame, f);
+ 
+   if (! menubar_widget)
+     deep_p = 1;
+   else if (pending_menu_activation && !deep_p)
+     deep_p = 1;
+ 
+   if (deep_p)
+     {
+       /* Make a widget-value tree representing the entire menu trees.  */
+ 
+       struct buffer *prev = current_buffer;
+       Lisp_Object buffer;
+       int specpdl_count = SPECPDL_INDEX ();
+       int previous_menu_items_used = f->menu_bar_items_used;
+       Lisp_Object *previous_items
+       = (Lisp_Object *) alloca (previous_menu_items_used
+                                 * sizeof (Lisp_Object));
+ 
+       /* If we are making a new widget, its contents are empty,
+        do always reinitialize them.  */
+       if (! menubar_widget)
+       previous_menu_items_used = 0;
+ 
+       buffer = XWINDOW (FRAME_SELECTED_WINDOW (f))->buffer;
+       specbind (Qinhibit_quit, Qt);
+       /* Don't let the debugger step into this code
+        because it is not reentrant.  */
+       specbind (Qdebug_on_next_call, Qnil);
+ 
+       record_unwind_protect (Fset_match_data, Fmatch_data (Qnil, Qnil));
+       if (NILP (Voverriding_local_map_menu_flag))
+       {
+         specbind (Qoverriding_terminal_local_map, Qnil);
+         specbind (Qoverriding_local_map, Qnil);
+       }
+ 
+       set_buffer_internal_1 (XBUFFER (buffer));
+ 
+       /* Run the Lucid hook.  */
+       safe_run_hooks (Qactivate_menubar_hook);
+       /* If it has changed current-menubar from previous value,
+        really recompute the menubar from the value.  */
+       if (! NILP (Vlucid_menu_bar_dirty_flag))
+       call0 (Qrecompute_lucid_menubar);
+       safe_run_hooks (Qmenu_bar_update_hook);
+       FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f));
+ 
+       items = FRAME_MENU_BAR_ITEMS (f);
+ 
+       /* Save the frame's previous menu bar contents data.  */
+       if (previous_menu_items_used)
+       bcopy (XVECTOR (f->menu_bar_vector)->contents, previous_items,
+              previous_menu_items_used * sizeof (Lisp_Object));
+ 
+       /* Fill in menu_items with the current menu bar contents.
+        This can evaluate Lisp code.  */
+       menu_items = f->menu_bar_vector;
+       menu_items_allocated = VECTORP (menu_items) ? ASIZE (menu_items) : 0;
+       submenu_start = (int *) alloca (XVECTOR (items)->size * sizeof (int *));
+       submenu_end = (int *) alloca (XVECTOR (items)->size * sizeof (int *));
+       submenu_n_panes = (int *) alloca (XVECTOR (items)->size * sizeof (int));
+       submenu_top_level_items
+       = (int *) alloca (XVECTOR (items)->size * sizeof (int *));
+       init_menu_items ();
+       for (i = 0; i < ASIZE (items); i += 4)
+       {
+         Lisp_Object key, string, maps;
+ 
+         last_i = i;
+ 
+         key = AREF (items, i);
+         string = AREF (items, i + 1);
+         maps = AREF (items, i + 2);
+         if (NILP (string))
+           break;
+ 
+         submenu_start[i] = menu_items_used;
+ 
+         menu_items_n_panes = 0;
+         submenu_top_level_items[i]
+           = parse_single_submenu (key, string, maps);
+         submenu_n_panes[i] = menu_items_n_panes;
+ 
+         submenu_end[i] = menu_items_used;
+       }
+ 
+       finish_menu_items ();
+ 
+       /* Convert menu_items into widget_value trees
+        to display the menu.  This cannot evaluate Lisp code.  */
+ 
+       wv = xmalloc_widget_value ();
+       wv->name = "menubar";
+       wv->value = 0;
+       wv->enabled = 1;
+       wv->button_type = BUTTON_TYPE_NONE;
+       wv->help = Qnil;
+       first_wv = wv;
+ 
+       for (i = 0; i < last_i; i += 4)
+       {
+         menu_items_n_panes = submenu_n_panes[i];
+         wv = digest_single_submenu (submenu_start[i], submenu_end[i],
+                                     submenu_top_level_items[i]);
+         if (prev_wv)
+           prev_wv->next = wv;
+         else
+           first_wv->contents = wv;
+         /* Don't set wv->name here; GC during the loop might relocate it.  */
+         wv->enabled = 1;
+         wv->button_type = BUTTON_TYPE_NONE;
+         prev_wv = wv;
+       }
+ 
+       set_buffer_internal_1 (prev);
+       unbind_to (specpdl_count, Qnil);
+ 
+       /* If there has been no change in the Lisp-level contents
+        of the menu bar, skip redisplaying it.  Just exit.  */
+ 
+       for (i = 0; i < previous_menu_items_used; i++)
+       if (menu_items_used == i
+           || (!EQ (previous_items[i], AREF (menu_items, i))))
+         break;
+       if (i == menu_items_used && i == previous_menu_items_used && i != 0)
+       {
+         free_menubar_widget_value_tree (first_wv);
+         menu_items = Qnil;
+ 
+         return;
+       }
+ 
+       /* Now GC cannot happen during the lifetime of the widget_value,
+        so it's safe to store data from a Lisp_String, as long as
+        local copies are made when the actual menu is created.
+        Windows takes care of this for normal string items, but
+        not for owner-drawn items or additional item-info.  */
+       wv = first_wv->contents;
+       for (i = 0; i < ASIZE (items); i += 4)
+       {
+         Lisp_Object string;
+         string = AREF (items, i + 1);
+         if (NILP (string))
+           break;
+         wv->name = (char *) SDATA (string);
+         update_submenu_strings (wv->contents);
+         wv = wv->next;
+       }
+ 
+       f->menu_bar_vector = menu_items;
+       f->menu_bar_items_used = menu_items_used;
+       menu_items = Qnil;
+     }
+   else
+     {
+       /* Make a widget-value tree containing
+        just the top level menu bar strings.  */
+ 
+       wv = xmalloc_widget_value ();
+       wv->name = "menubar";
+       wv->value = 0;
+       wv->enabled = 1;
+       wv->button_type = BUTTON_TYPE_NONE;
+       wv->help = Qnil;
+       first_wv = wv;
+ 
+       items = FRAME_MENU_BAR_ITEMS (f);
+       for (i = 0; i < ASIZE (items); i += 4)
+       {
+         Lisp_Object string;
+ 
+         string = AREF (items, i + 1);
+         if (NILP (string))
+           break;
+ 
+         wv = xmalloc_widget_value ();
+         wv->name = (char *) SDATA (string);
+         wv->value = 0;
+         wv->enabled = 1;
+         wv->button_type = BUTTON_TYPE_NONE;
+         wv->help = Qnil;
+         /* This prevents lwlib from assuming this
+            menu item is really supposed to be empty.  */
+         /* The EMACS_INT cast avoids a warning.
+            This value just has to be different from small integers.  */
+         wv->call_data = (void *) (EMACS_INT) (-1);
+ 
+         if (prev_wv)
+           prev_wv->next = wv;
+         else
+           first_wv->contents = wv;
+         prev_wv = wv;
+       }
+ 
+       /* Forget what we thought we knew about what is in the
+        detailed contents of the menu bar menus.
+        Changing the top level always destroys the contents.  */
+       f->menu_bar_items_used = 0;
+     }
+ 
+   /* Create or update the menu bar widget.  */
+ 
+   BLOCK_INPUT;
+ 
+   if (menubar_widget)
+     {
+       /* Empty current menubar, rather than creating a fresh one.  */
+       while (DeleteMenu (menubar_widget, 0, MF_BYPOSITION))
+       ;
+     }
+   else
+     {
+       menubar_widget = CreateMenu ();
+     }
+   fill_in_menu (menubar_widget, first_wv->contents);
+ 
+   free_menubar_widget_value_tree (first_wv);
+ 
+   {
+     HMENU old_widget = f->output_data.w32->menubar_widget;
+ 
+     f->output_data.w32->menubar_widget = menubar_widget;
+     SetMenu (FRAME_W32_WINDOW (f), f->output_data.w32->menubar_widget);
+     /* Causes flicker when menu bar is updated
+     DrawMenuBar (FRAME_W32_WINDOW (f)); */
+ 
+     /* Force the window size to be recomputed so that the frame's text
+        area remains the same, if menubar has just been created.  */
+     if (old_widget == NULL)
+       x_set_window_size (f, 0, FRAME_COLS (f), FRAME_LINES (f));
+   }
+ 
+   UNBLOCK_INPUT;
+ }
+ 
+ /* Called from Fx_create_frame to create the initial menubar of a frame
+    before it is mapped, so that the window is mapped with the menubar already
+    there instead of us tacking it on later and thrashing the window after it
+    is visible.  */
+ 
+ void
+ initialize_frame_menubar (f)
+      FRAME_PTR f;
+ {
+   /* This function is called before the first chance to redisplay
+      the frame.  It has to be, so the frame will have the right size.  */
+   FRAME_MENU_BAR_ITEMS (f) = menu_bar_items (FRAME_MENU_BAR_ITEMS (f));
+   set_frame_menubar (f, 1, 1);
+ }
+ 
+ /* Get rid of the menu bar of frame F, and free its storage.
+    This is used when deleting a frame, and when turning off the menu bar.  */
+ 
+ void
+ free_frame_menubar (f)
+      FRAME_PTR f;
+ {
+   BLOCK_INPUT;
+ 
+   {
+     HMENU old = GetMenu (FRAME_W32_WINDOW (f));
+     SetMenu (FRAME_W32_WINDOW (f), NULL);
+     f->output_data.w32->menubar_widget = NULL;
+     DestroyMenu (old);
+   }
+ 
+   UNBLOCK_INPUT;
+ }
+ 
+ 
+ /* w32_menu_show actually displays a menu using the panes and items in
+    menu_items and returns the value selected from it; we assume input
+    is blocked by the caller.  */
+ 
+ /* F is the frame the menu is for.
+    X and Y are the frame-relative specified position,
+    relative to the inside upper left corner of the frame F.
+    FOR_CLICK is nonzero if this menu was invoked for a mouse click.
+    KEYMAPS is 1 if this menu was specified with keymaps;
+     in that case, we return a list containing the chosen item's value
+     and perhaps also the pane's prefix.
+    TITLE is the specified menu title.
+    ERROR is a place to store an error message string in case of failure.
+    (We return nil on failure, but the value doesn't actually matter.)  */
+ 
+ static Lisp_Object
+ w32_menu_show (f, x, y, for_click, keymaps, title, error)
+      FRAME_PTR f;
+      int x;
+      int y;
+      int for_click;
+      int keymaps;
+      Lisp_Object title;
+      char **error;
+ {
+   int i;
+   int menu_item_selection;
+   HMENU menu;
+   POINT pos;
+   widget_value *wv, *save_wv = 0, *first_wv = 0, *prev_wv = 0;
+   widget_value **submenu_stack
+     = (widget_value **) alloca (menu_items_used * sizeof (widget_value *));
+   Lisp_Object *subprefix_stack
+     = (Lisp_Object *) alloca (menu_items_used * sizeof (Lisp_Object));
+   int submenu_depth = 0;
+   int first_pane;
+ 
+   *error = NULL;
+ 
+   if (menu_items_used <= MENU_ITEMS_PANE_LENGTH)
+     {
+       *error = "Empty menu";
+       return Qnil;
+     }
+ 
+   /* Create a tree of widget_value objects
+      representing the panes and their items.  */
+   wv = xmalloc_widget_value ();
+   wv->name = "menu";
+   wv->value = 0;
+   wv->enabled = 1;
+   wv->button_type = BUTTON_TYPE_NONE;
+   wv->help = Qnil;
+   first_wv = wv;
+   first_pane = 1;
+ 
+   /* Loop over all panes and items, filling in the tree.  */
+   i = 0;
+   while (i < menu_items_used)
+     {
+       if (EQ (AREF (menu_items, i), Qnil))
+       {
+         submenu_stack[submenu_depth++] = save_wv;
+         save_wv = prev_wv;
+         prev_wv = 0;
+         first_pane = 1;
+         i++;
+       }
+       else if (EQ (AREF (menu_items, i), Qlambda))
+       {
+         prev_wv = save_wv;
+         save_wv = submenu_stack[--submenu_depth];
+         first_pane = 0;
+         i++;
+       }
+       else if (EQ (AREF (menu_items, i), Qt)
+              && submenu_depth != 0)
+       i += MENU_ITEMS_PANE_LENGTH;
+       /* Ignore a nil in the item list.
+        It's meaningful only for dialog boxes.  */
+       else if (EQ (AREF (menu_items, i), Qquote))
+       i += 1;
+       else if (EQ (AREF (menu_items, i), Qt))
+       {
+         /* Create a new pane.  */
+         Lisp_Object pane_name, prefix;
+         char *pane_string;
+         pane_name = AREF (menu_items, i + MENU_ITEMS_PANE_NAME);
+         prefix = AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);
+ 
+         if (STRINGP (pane_name))
+           {
+             if (unicode_append_menu)
+               pane_name = ENCODE_UTF_8 (pane_name);
+             else if (STRING_MULTIBYTE (pane_name))
+               pane_name = ENCODE_SYSTEM (pane_name);
+ 
+             ASET (menu_items, i + MENU_ITEMS_PANE_NAME, pane_name);
+           }
+ 
+         pane_string = (NILP (pane_name)
+                        ? "" : (char *) SDATA (pane_name));
+         /* If there is just one top-level pane, put all its items directly
+            under the top-level menu.  */
+         if (menu_items_n_panes == 1)
+           pane_string = "";
+ 
+         /* If the pane has a meaningful name,
+            make the pane a top-level menu item
+            with its items as a submenu beneath it.  */
+         if (!keymaps && strcmp (pane_string, ""))
+           {
+             wv = xmalloc_widget_value ();
+             if (save_wv)
+               save_wv->next = wv;
+             else
+               first_wv->contents = wv;
+             wv->name = pane_string;
+             if (keymaps && !NILP (prefix))
+               wv->name++;
+             wv->value = 0;
+             wv->enabled = 1;
+             wv->button_type = BUTTON_TYPE_NONE;
+             wv->help = Qnil;
+             save_wv = wv;
+             prev_wv = 0;
+           }
+         else if (first_pane)
+           {
+             save_wv = wv;
+             prev_wv = 0;
+           }
+         first_pane = 0;
+         i += MENU_ITEMS_PANE_LENGTH;
+       }
+       else
+       {
+         /* Create a new item within current pane.  */
+         Lisp_Object item_name, enable, descrip, def, type, selected, help;
+ 
+         item_name = AREF (menu_items, i + MENU_ITEMS_ITEM_NAME);
+         enable = AREF (menu_items, i + MENU_ITEMS_ITEM_ENABLE);
+         descrip = AREF (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY);
+         def = AREF (menu_items, i + MENU_ITEMS_ITEM_DEFINITION);
+         type = AREF (menu_items, i + MENU_ITEMS_ITEM_TYPE);
+         selected = AREF (menu_items, i + MENU_ITEMS_ITEM_SELECTED);
+           help = AREF (menu_items, i + MENU_ITEMS_ITEM_HELP);
+ 
+           if (STRINGP (item_name))
+           {
+             if (unicode_append_menu)
+               item_name = ENCODE_UTF_8 (item_name);
+             else if (STRING_MULTIBYTE (item_name))
+               item_name = ENCODE_SYSTEM (item_name);
+ 
+             ASET (menu_items, i + MENU_ITEMS_ITEM_NAME, item_name);
+           }
+ 
+         if (STRINGP (descrip) && STRING_MULTIBYTE (descrip))
+             {
+             descrip = ENCODE_SYSTEM (descrip);
+             ASET (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY, descrip);
+           }
+ 
+         wv = xmalloc_widget_value ();
+         if (prev_wv)
+           prev_wv->next = wv;
+         else
+           save_wv->contents = wv;
+         wv->name = (char *) SDATA (item_name);
+         if (!NILP (descrip))
+           wv->key = (char *) SDATA (descrip);
+         wv->value = 0;
+         /* Use the contents index as call_data, since we are
+              restricted to 16-bits.  */
+         wv->call_data = !NILP (def) ? (void *) (EMACS_INT) i : 0;
+         wv->enabled = !NILP (enable);
+ 
+         if (NILP (type))
+           wv->button_type = BUTTON_TYPE_NONE;
+         else if (EQ (type, QCtoggle))
+           wv->button_type = BUTTON_TYPE_TOGGLE;
+         else if (EQ (type, QCradio))
+           wv->button_type = BUTTON_TYPE_RADIO;
+         else
+           abort ();
+ 
+         wv->selected = !NILP (selected);
+           if (!STRINGP (help))
+           help = Qnil;
+ 
+         wv->help = help;
+ 
+         prev_wv = wv;
+ 
+         i += MENU_ITEMS_ITEM_LENGTH;
+       }
+     }
+ 
+   /* Deal with the title, if it is non-nil.  */
+   if (!NILP (title))
+     {
+       widget_value *wv_title = xmalloc_widget_value ();
+       widget_value *wv_sep = xmalloc_widget_value ();
+ 
+       /* Maybe replace this separator with a bitmap or owner-draw item
+        so that it looks better.  Having two separators looks odd.  */
+       wv_sep->name = "--";
+       wv_sep->next = first_wv->contents;
+       wv_sep->help = Qnil;
+ 
+       if (unicode_append_menu)
+       title = ENCODE_UTF_8 (title);
+       else if (STRING_MULTIBYTE (title))
+       title = ENCODE_SYSTEM (title);
+ 
+       wv_title->name = (char *) SDATA (title);
+       wv_title->enabled = TRUE;
+       wv_title->title = TRUE;
+       wv_title->button_type = BUTTON_TYPE_NONE;
+       wv_title->help = Qnil;
+       wv_title->next = wv_sep;
+       first_wv->contents = wv_title;
+     }
+ 
+   /* Actually create the menu.  */
+   current_popup_menu = menu = CreatePopupMenu ();
+   fill_in_menu (menu, first_wv->contents);
+ 
+   /* Adjust coordinates to be root-window-relative.  */
+   pos.x = x;
+   pos.y = y;
+   ClientToScreen (FRAME_W32_WINDOW (f), &pos);
+ 
+   /* No selection has been chosen yet.  */
+   menu_item_selection = 0;
+ 
+   /* Display the menu.  */
+   menu_item_selection = SendMessage (FRAME_W32_WINDOW (f),
+                                    WM_EMACS_TRACKPOPUPMENU,
+                                    (WPARAM)menu, (LPARAM)&pos);
+ 
+   /* Clean up extraneous mouse events which might have been generated
+      during the call. */
+   discard_mouse_events ();
+ 
+   /* Free the widget_value objects we used to specify the contents.  */
+   free_menubar_widget_value_tree (first_wv);
+ 
+   DestroyMenu (menu);
+ 
+   /* Find the selected item, and its pane, to return
+      the proper value.  */
+   if (menu_item_selection != 0)
+     {
+       Lisp_Object prefix, entry;
+ 
+       prefix = entry = Qnil;
+       i = 0;
+       while (i < menu_items_used)
+       {
+         if (EQ (AREF (menu_items, i), Qnil))
+           {
+             subprefix_stack[submenu_depth++] = prefix;
+             prefix = entry;
+             i++;
+           }
+         else if (EQ (AREF (menu_items, i), Qlambda))
+           {
+             prefix = subprefix_stack[--submenu_depth];
+             i++;
+           }
+         else if (EQ (AREF (menu_items, i), Qt))
+           {
+             prefix = AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);
+             i += MENU_ITEMS_PANE_LENGTH;
+           }
+         /* Ignore a nil in the item list.
+            It's meaningful only for dialog boxes.  */
+         else if (EQ (AREF (menu_items, i), Qquote))
+           i += 1;
+         else
+           {
+             entry     = AREF (menu_items, i + MENU_ITEMS_ITEM_VALUE);
+             if (menu_item_selection == i)
+               {
+                 if (keymaps != 0)
+                   {
+                     int j;
+ 
+                     entry = Fcons (entry, Qnil);
+                     if (!NILP (prefix))
+                       entry = Fcons (prefix, entry);
+                     for (j = submenu_depth - 1; j >= 0; j--)
+                       if (!NILP (subprefix_stack[j]))
+                         entry = Fcons (subprefix_stack[j], entry);
+                   }
+                 return entry;
+               }
+             i += MENU_ITEMS_ITEM_LENGTH;
+           }
+       }
+     }
+ 
+   return Qnil;
+ }
+ 
+ 
+ #ifdef HAVE_DIALOGS
+ static char * button_names [] = {
+   "button1", "button2", "button3", "button4", "button5",
+   "button6", "button7", "button8", "button9", "button10" };
+ 
+ static Lisp_Object
+ w32_dialog_show (f, keymaps, title, error)
+      FRAME_PTR f;
+      int keymaps;
+      Lisp_Object title;
+      char **error;
+ {
+   int i, nb_buttons=0;
+   char dialog_name[6];
+   int menu_item_selection;
+ 
+   widget_value *wv, *first_wv = 0, *prev_wv = 0;
+ 
+   /* Number of elements seen so far, before boundary.  */
+   int left_count = 0;
+   /* 1 means we've seen the boundary between left-hand elts and right-hand.  
*/
+   int boundary_seen = 0;
+ 
+   *error = NULL;
+ 
+   if (menu_items_n_panes > 1)
+     {
+       *error = "Multiple panes in dialog box";
+       return Qnil;
+     }
+ 
+   /* Create a tree of widget_value objects
+      representing the text label and buttons.  */
+   {
+     Lisp_Object pane_name, prefix;
+     char *pane_string;
+     pane_name = AREF (menu_items, MENU_ITEMS_PANE_NAME);
+     prefix = AREF (menu_items, MENU_ITEMS_PANE_PREFIX);
+     pane_string = (NILP (pane_name)
+                  ? "" : (char *) SDATA (pane_name));
+     prev_wv = xmalloc_widget_value ();
+     prev_wv->value = pane_string;
+     if (keymaps && !NILP (prefix))
+       prev_wv->name++;
+     prev_wv->enabled = 1;
+     prev_wv->name = "message";
+     prev_wv->help = Qnil;
+     first_wv = prev_wv;
+ 
+     /* Loop over all panes and items, filling in the tree.  */
+     i = MENU_ITEMS_PANE_LENGTH;
+     while (i < menu_items_used)
+       {
+ 
+       /* Create a new item within current pane.  */
+       Lisp_Object item_name, enable, descrip, help;
+ 
+       item_name = AREF (menu_items, i + MENU_ITEMS_ITEM_NAME);
+       enable = AREF (menu_items, i + MENU_ITEMS_ITEM_ENABLE);
+       descrip = AREF (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY);
+         help = AREF (menu_items, i + MENU_ITEMS_ITEM_HELP);
+ 
+       if (NILP (item_name))
+         {
+           free_menubar_widget_value_tree (first_wv);
+           *error = "Submenu in dialog items";
+           return Qnil;
+         }
+       if (EQ (item_name, Qquote))
+         {
+           /* This is the boundary between left-side elts
+              and right-side elts.  Stop incrementing right_count.  */
+           boundary_seen = 1;
+           i++;
+           continue;
+         }
+       if (nb_buttons >= 9)
+         {
+           free_menubar_widget_value_tree (first_wv);
+           *error = "Too many dialog items";
+           return Qnil;
+         }
+ 
+       wv = xmalloc_widget_value ();
+       prev_wv->next = wv;
+       wv->name = (char *) button_names[nb_buttons];
+       if (!NILP (descrip))
+         wv->key = (char *) SDATA (descrip);
+       wv->value = (char *) SDATA (item_name);
+       wv->call_data = (void *) &AREF (menu_items, i);
+       wv->enabled = !NILP (enable);
+       wv->help = Qnil;
+       prev_wv = wv;
+ 
+       if (! boundary_seen)
+         left_count++;
+ 
+       nb_buttons++;
+       i += MENU_ITEMS_ITEM_LENGTH;
+       }
+ 
+     /* If the boundary was not specified,
+        by default put half on the left and half on the right.  */
+     if (! boundary_seen)
+       left_count = nb_buttons - nb_buttons / 2;
+ 
+     wv = xmalloc_widget_value ();
+     wv->name = dialog_name;
+     wv->help = Qnil;
+ 
+     /* Dialog boxes use a really stupid name encoding
+        which specifies how many buttons to use
+        and how many buttons are on the right.
+        The Q means something also.  */
+     dialog_name[0] = 'Q';
+     dialog_name[1] = '0' + nb_buttons;
+     dialog_name[2] = 'B';
+     dialog_name[3] = 'R';
+     /* Number of buttons to put on the right.  */
+     dialog_name[4] = '0' + nb_buttons - left_count;
+     dialog_name[5] = 0;
+     wv->contents = first_wv;
+     first_wv = wv;
+   }
+ 
+   /* Actually create the dialog.  */
+   dialog_id = widget_id_tick++;
+   menu = lw_create_widget (first_wv->name, "dialog", dialog_id, first_wv,
+                          f->output_data.w32->widget, 1, 0,
+                          dialog_selection_callback, 0);
+   lw_modify_all_widgets (dialog_id, first_wv->contents, TRUE);
+ 
+   /* Free the widget_value objects we used to specify the contents.  */
+   free_menubar_widget_value_tree (first_wv);
+ 
+   /* No selection has been chosen yet.  */
+   menu_item_selection = 0;
+ 
+   /* Display the menu.  */
+   lw_pop_up_all_widgets (dialog_id);
+   popup_activated_flag = 1;
+ 
+   /* Process events that apply to the menu.  */
+   popup_get_selection ((XEvent *) 0, FRAME_X_DISPLAY_INFO (f), dialog_id);
+ 
+   lw_destroy_all_widgets (dialog_id);
+ 
+   /* Find the selected item, and its pane, to return
+      the proper value.  */
+   if (menu_item_selection != 0)
+     {
+       Lisp_Object prefix;
+ 
+       prefix = Qnil;
+       i = 0;
+       while (i < menu_items_used)
+       {
+         Lisp_Object entry;
+ 
+         if (EQ (AREF (menu_items, i), Qt))
+           {
+             prefix = AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);
+             i += MENU_ITEMS_PANE_LENGTH;
+           }
+         else
+           {
+             entry     = AREF (menu_items, i + MENU_ITEMS_ITEM_VALUE);
+             if (menu_item_selection == i)
+               {
+                 if (keymaps != 0)
+                   {
+                     entry = Fcons (entry, Qnil);
+                     if (!NILP (prefix))
+                       entry = Fcons (prefix, entry);
+                   }
+                 return entry;
+               }
+             i += MENU_ITEMS_ITEM_LENGTH;
+           }
+       }
+     }
+ 
+   return Qnil;
+ }
+ #endif  /* HAVE_DIALOGS  */
+ 
+ 
+ /* Is this item a separator? */
+ static int
+ name_is_separator (name)
+      char *name;
+ {
+   char *start = name;
+ 
+   /* Check if name string consists of only dashes ('-').  */
+   while (*name == '-') name++;
+   /* Separators can also be of the form "--:TripleSuperMegaEtched"
+      or "--deep-shadow".  We don't implement them yet, se we just treat
+      them like normal separators.  */
+   return (*name == '\0' || start + 2 == name);
+ }
+ 
+ 
+ /* Indicate boundary between left and right.  */
+ static int
+ add_left_right_boundary (HMENU menu)
+ {
+   return AppendMenu (menu, MF_MENUBARBREAK, 0, NULL);
+ }
+ 
+ /* UTF8: 0xxxxxxx, 110xxxxx 10xxxxxx, 1110xxxx, 10xxxxxx, 10xxxxxx */
+ static void
+ utf8to16 (unsigned char * src, int len, WCHAR * dest)
+ {
+   while (len > 0)
+     {
+       int utf16;
+       if (*src < 0x80)
+       {
+         *dest = (WCHAR) *src;
+         dest++; src++; len--;
+       }
+       /* Since we might get >3 byte sequences which we don't handle, ignore 
the extra parts.  */
+       else if (*src < 0xC0)
+       {
+         src++; len--;
+       }
+       /* 2 char UTF-8 sequence.  */
+       else if (*src <  0xE0)
+       {
+         *dest = (WCHAR) (((*src & 0x1f) << 6)
+                          | (*(src + 1) & 0x3f));
+         src += 2; len -= 2; dest++;
+       }
+       else if (*src < 0xF0)
+       {
+         *dest = (WCHAR) (((*src & 0x0f) << 12)
+                          | ((*(src + 1) & 0x3f) << 6)
+                          | (*(src + 2) & 0x3f));
+         src += 3; len -= 3; dest++;
+       }
+       else /* Not encodable. Insert Unicode Substitution char.  */
+       {
+         *dest = (WCHAR) 0xfffd;
+         src++; len--; dest++;
+       }
+     }
+   *dest = 0;
+ }
+ 
+ static int
+ add_menu_item (HMENU menu, widget_value *wv, HMENU item)
+ {
+   UINT fuFlags;
+   char *out_string;
+   int return_value;
+ 
+   if (name_is_separator (wv->name))
+     {
+       fuFlags = MF_SEPARATOR;
+       out_string = NULL;
+     }
+   else
+     {
+       if (wv->enabled)
+       fuFlags = MF_STRING;
+       else
+       fuFlags = MF_STRING | MF_GRAYED;
+ 
+       if (wv->key != NULL)
+       {
+         out_string = alloca (strlen (wv->name) + strlen (wv->key) + 2);
+         strcpy (out_string, wv->name);
+         strcat (out_string, "\t");
+         strcat (out_string, wv->key);
+       }
+       else
+       out_string = wv->name;
+ 
+       if (item != NULL)
+       fuFlags = MF_POPUP;
+       else if (wv->title || wv->call_data == 0)
+       {
+         /* Only use MF_OWNERDRAW if GetMenuItemInfo is usable, since
+            we can't deallocate the memory otherwise.  */
+         if (get_menu_item_info)
+           {
+               out_string = (char *) local_alloc (strlen (wv->name) + 1);
+               strcpy (out_string, wv->name);
+ #ifdef MENU_DEBUG
+             DebPrint ("Menu: allocing %ld for owner-draw", out_string);
+ #endif
+             fuFlags = MF_OWNERDRAW | MF_DISABLED;
+           }
+         else
+           fuFlags = MF_DISABLED;
+       }
+ 
+       /* Draw radio buttons and tickboxes. */
+       else if (wv->selected && (wv->button_type == BUTTON_TYPE_TOGGLE ||
+                               wv->button_type == BUTTON_TYPE_RADIO))
+       fuFlags |= MF_CHECKED;
+       else
+       fuFlags |= MF_UNCHECKED;
+     }
+ 
+   if (unicode_append_menu && out_string)
+     {
+       /* Convert out_string from UTF-8 to UTF-16-LE.  */
+       int utf8_len = strlen (out_string);
+       WCHAR * utf16_string;
+       if (fuFlags & MF_OWNERDRAW)
+       utf16_string = local_alloc ((utf8_len + 1) * sizeof (WCHAR));
+       else
+       utf16_string = alloca ((utf8_len + 1) * sizeof (WCHAR));
+ 
+       utf8to16 (out_string, utf8_len, utf16_string);
+       return_value = unicode_append_menu (menu, fuFlags,
+                                         item != NULL ? (UINT) item
+                                           : (UINT) wv->call_data,
+                                         utf16_string);
+       if (fuFlags & MF_OWNERDRAW)
+       local_free (out_string);
+     }
+   else
+     {
+       return_value =
+       AppendMenu (menu,
+                   fuFlags,
+                   item != NULL ? (UINT) item : (UINT) wv->call_data,
+                   out_string );
+     }
+ 
+   /* This must be done after the menu item is created.  */
+   if (!wv->title && wv->call_data != 0)
+     {
+       if (set_menu_item_info)
+       {
+         MENUITEMINFO info;
+         bzero (&info, sizeof (info));
+         info.cbSize = sizeof (info);
+         info.fMask = MIIM_DATA;
+ 
+         /* Set help string for menu item.  Leave it as a Lisp_Object
+            until it is ready to be displayed, since GC can happen while
+            menus are active.  */
+         if (!NILP (wv->help))
+ #ifdef USE_LISP_UNION_TYPE
+           info.dwItemData = (DWORD) (wv->help).i;
+ #else
+           info.dwItemData = (DWORD) (wv->help);
+ #endif
+         if (wv->button_type == BUTTON_TYPE_RADIO)
+           {
+             /* CheckMenuRadioItem allows us to differentiate TOGGLE and
+                RADIO items, but is not available on NT 3.51 and earlier.  */
+             info.fMask |= MIIM_TYPE | MIIM_STATE;
+             info.fType = MFT_RADIOCHECK | MFT_STRING;
+             info.dwTypeData = out_string;
+             info.fState = wv->selected ? MFS_CHECKED : MFS_UNCHECKED;
+           }
+ 
+         set_menu_item_info (menu,
+                             item != NULL ? (UINT) item : (UINT) wv->call_data,
+                             FALSE, &info);
+       }
+     }
+   return return_value;
+ }
+ 
+ /* Construct native Windows menu(bar) based on widget_value tree.  */
+ int
+ fill_in_menu (HMENU menu, widget_value *wv)
+ {
+   int items_added = 0;
+ 
+   for ( ; wv != NULL; wv = wv->next)
+     {
+       if (wv->contents)
+       {
+         HMENU sub_menu = CreatePopupMenu ();
+ 
+         if (sub_menu == NULL)
+           return 0;
+ 
+         if (!fill_in_menu (sub_menu, wv->contents) ||
+             !add_menu_item (menu, wv, sub_menu))
+           {
+             DestroyMenu (sub_menu);
+             return 0;
+           }
+       }
+       else
+       {
+         if (!add_menu_item (menu, wv, NULL))
+           return 0;
+       }
+     }
+   return 1;
+ }
+ 
+ int
+ popup_activated ()
+ {
+   /* popup_activated_flag not actually used on W32 */
+   return 0;
+ }
+ 
+ /* Display help string for currently pointed to menu item. Not
+    supported on NT 3.51 and earlier, as GetMenuItemInfo is not
+    available. */
+ void
+ w32_menu_display_help (HWND owner, HMENU menu, UINT item, UINT flags)
+ {
+   if (get_menu_item_info)
+     {
+       struct frame *f = x_window_to_frame (&one_w32_display_info, owner);
+       Lisp_Object frame, help;
+ 
+       /* No help echo on owner-draw menu items.  */
+       if (flags & MF_OWNERDRAW || flags & MF_POPUP)
+       help = Qnil;
+       else
+       {
+         MENUITEMINFO info;
+ 
+         bzero (&info, sizeof (info));
+         info.cbSize = sizeof (info);
+         info.fMask = MIIM_DATA;
+         get_menu_item_info (menu, item, FALSE, &info);
+ 
+ #ifdef USE_LISP_UNION_TYPE
+         help = info.dwItemData ? (Lisp_Object) ((EMACS_INT) info.dwItemData)
+                                : Qnil;
+ #else
+         help = info.dwItemData ? (Lisp_Object) info.dwItemData : Qnil;
+ #endif
+       }
+ 
+       /* Store the help echo in the keyboard buffer as the X toolkit
+        version does, rather than directly showing it. This seems to
+        solve the GC problems that were present when we based the
+        Windows code on the non-toolkit version.  */
+       if (f)
+       {
+         XSETFRAME (frame, f);
+         kbd_buffer_store_help_event (frame, help);
+       }
+       else
+       /* X version has a loop through frames here, which doesn't
+          appear to do anything, unless it has some side effect.  */
+       show_help_echo (help, Qnil, Qnil, Qnil, 1);
+     }
+ }
+ 
+ /* Free memory used by owner-drawn strings.  */
+ static void
+ w32_free_submenu_strings (menu)
+      HMENU menu;
+ {
+   int i, num = GetMenuItemCount (menu);
+   for (i = 0; i < num; i++)
+     {
+       MENUITEMINFO info;
+       bzero (&info, sizeof (info));
+       info.cbSize = sizeof (info);
+       info.fMask = MIIM_DATA | MIIM_TYPE | MIIM_SUBMENU;
+ 
+       get_menu_item_info (menu, i, TRUE, &info);
+ 
+       /* Owner-drawn names are held in dwItemData.  */
+       if ((info.fType & MF_OWNERDRAW) && info.dwItemData)
+       {
+ #ifdef MENU_DEBUG
+         DebPrint ("Menu: freeing %ld for owner-draw", info.dwItemData);
+ #endif
+         local_free (info.dwItemData);
+       }
+ 
+       /* Recurse down submenus.  */
+       if (info.hSubMenu)
+       w32_free_submenu_strings (info.hSubMenu);
+     }
+ }
+ 
+ void
+ w32_free_menu_strings (hwnd)
+      HWND hwnd;
+ {
+   HMENU menu = current_popup_menu;
+ 
+   if (get_menu_item_info)
+     {
+       /* If there is no popup menu active, free the strings from the frame's
+        menubar.  */
+       if (!menu)
+       menu = GetMenu (hwnd);
+ 
+       if (menu)
+       w32_free_submenu_strings (menu);
+     }
+ 
+   current_popup_menu = NULL;
+ }
+ 
+ #endif /* HAVE_MENUS */
+ 
+ void syms_of_w32menu ()
+ {
+       globals_of_w32menu ();
+   staticpro (&menu_items);
+   menu_items = Qnil;
+ 
+   current_popup_menu = NULL;
+ 
+   Qdebug_on_next_call = intern ("debug-on-next-call");
+   staticpro (&Qdebug_on_next_call);
+ 
+   DEFVAR_LISP ("menu-updating-frame", &Vmenu_updating_frame,
+              doc: /* Frame for which we are updating a menu.
+ The enable predicate for a menu command should check this variable.  */);
+   Vmenu_updating_frame = Qnil;
+ 
+   defsubr (&Sx_popup_menu);
+ #ifdef HAVE_MENUS
+   defsubr (&Sx_popup_dialog);
+ #endif
+ }
+ 
+ /*
+       globals_of_w32menu is used to initialize those global variables that
+       must always be initialized on startup even when the global variable
+       initialized is non zero (see the function main in emacs.c).
+       globals_of_w32menu is called from syms_of_w32menu when the global
+       variable initialized is 0 and directly from main when initialized
+       is non zero.
+  */
+ void globals_of_w32menu ()
+ {
+       /* See if Get/SetMenuItemInfo functions are available.  */
+   HMODULE user32 = GetModuleHandle ("user32.dll");
+   get_menu_item_info = (GetMenuItemInfoA_Proc) GetProcAddress (user32, 
"GetMenuItemInfoA");
+   set_menu_item_info = (SetMenuItemInfoA_Proc) GetProcAddress (user32, 
"SetMenuItemInfoA");
+   unicode_append_menu = (AppendMenuW_Proc) GetProcAddress (user32, 
"AppendMenuW");
+ }
+ 
+ /* arch-tag: 0eaed431-bb4e-4aac-a527-95a1b4f1fed0
+    (do not change this comment) */




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