nsmenu.m 49.2 KB
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/* NeXT/Open/GNUstep and MacOSX Cocoa menu and toolbar module.
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   Copyright (C) 2007-2011 Free Software Foundation, Inc.
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This file is part of GNU Emacs.

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GNU Emacs is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
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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
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along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
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/*
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By Adrian Robert, based on code from original nsmenu.m (Carl Edman,
Christian Limpach, Scott Bender, Christophe de Dinechin) and code in the
Carbon version by Yamamoto Mitsuharu. */

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/* This should be the first include, as it may set up #defines affecting
   interpretation of even the system includes. */
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#include <config.h>
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#include <setjmp.h>
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#include "lisp.h"
#include "window.h"
#include "buffer.h"
#include "keymap.h"
#include "coding.h"
#include "commands.h"
#include "blockinput.h"
#include "nsterm.h"
#include "termhooks.h"
#include "keyboard.h"
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#include "menu.h"
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#define NSMENUPROFILE 0

#if NSMENUPROFILE
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#include <sys/timeb.h>
#include <sys/types.h>
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#endif
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#define MenuStagger 10.0

#if 0
int menu_trace_num = 0;
#define NSTRACE(x)        fprintf (stderr, "%s:%d: [%d] " #x "\n",        \
                                __FILE__, __LINE__, ++menu_trace_num)
#else
#define NSTRACE(x)
#endif

#if 0
/* Include lisp -> C common menu parsing code */
#define ENCODE_MENU_STRING(str) ENCODE_UTF_8 (str)
#include "nsmenu_common.c"
#endif

extern Lisp_Object Qundefined, Qmenu_enable, Qmenu_bar_update_hook;
extern Lisp_Object QCtoggle, QCradio;

Lisp_Object Qdebug_on_next_call;
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extern Lisp_Object Qoverriding_local_map, Qoverriding_terminal_local_map;
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extern long context_menu_value;
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EmacsMenu *mainMenu, *svcsMenu, *dockMenu;
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/* Nonzero means a menu is currently active.  */
static int popup_activated_flag;
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static NSModalSession popupSession;
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/* NOTE: toolbar implementation is at end,
  following complete menu implementation. */


/* ==========================================================================

    Menu: Externally-called functions

   ========================================================================== */


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/* FIXME: not currently used, but should normalize with other terms. */
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void
x_activate_menubar (struct frame *f)
{
    fprintf (stderr, "XXX: Received x_activate_menubar event.\n");
}


/* Supposed to discard menubar and free storage.  Since we share the
   menubar among frames and update its context for the focused window,
   there is nothing to do here. */
void
free_frame_menubar (struct frame *f)
{
  return;
}


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int
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popup_activated (void)
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{
  return popup_activated_flag;
}


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/* --------------------------------------------------------------------------
    Update menubar.  Three cases:
    1) deep_p = 0, submenu = nil: Fresh switch onto a frame -- either set up
       just top-level menu strings (OS X), or goto case (2) (GNUstep).
    2) deep_p = 1, submenu = nil: Recompute all submenus.
    3) deep_p = 1, submenu = non-nil: Update contents of a single submenu.
   -------------------------------------------------------------------------- */
void
ns_update_menubar (struct frame *f, int deep_p, EmacsMenu *submenu)
{
  NSAutoreleasePool *pool;
  id menu = [NSApp mainMenu];
  static EmacsMenu *last_submenu = nil;
  BOOL needsSet = NO;
  const char *submenuTitle = [[submenu title] UTF8String];
  extern int waiting_for_input;
  int owfi;
  Lisp_Object items;
  widget_value *wv, *first_wv, *prev_wv = 0;
  int i;

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#if NSMENUPROFILE
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  struct timeb tb;
  long t;
#endif

  NSTRACE (set_frame_menubar);

  if (f != SELECTED_FRAME ())
      return;
  XSETFRAME (Vmenu_updating_frame, f);
/*fprintf (stderr, "ns_update_menubar: frame: %p\tdeep: %d\tsub: %p\n", f, deep_p, submenu); */

  BLOCK_INPUT;
  pool = [[NSAutoreleasePool alloc] init];

  /* Menu may have been created automatically; if so, discard it. */
  if ([menu isKindOfClass: [EmacsMenu class]] == NO)
    {
      [menu release];
      menu = nil;
    }

  if (menu == nil)
    {
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      menu = [[EmacsMenu alloc] initWithTitle: ns_app_name];
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      needsSet = YES;
    }
  else
    {  /* close up anything on there */
      id attMenu = [menu attachedMenu];
      if (attMenu != nil)
        [attMenu close];
    }

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#if NSMENUPROFILE
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  ftime (&tb);
  t = -(1000*tb.time+tb.millitm);
#endif

#ifdef NS_IMPL_GNUSTEP
  deep_p = 1; /* until GNUstep NSMenu implements the Panther delegation model */
#endif

  if (deep_p)
    {
      /* Fully parse one or more of the submenus. */
      int n = 0;
      int *submenu_start, *submenu_end;
      int *submenu_top_level_items, *submenu_n_panes;
      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));

      /* lisp preliminaries */
      buffer = XWINDOW (FRAME_SELECTED_WINDOW (f))->buffer;
      specbind (Qinhibit_quit, Qt);
      specbind (Qdebug_on_next_call, Qnil);
      record_unwind_save_match_data ();
      if (NILP (Voverriding_local_map_menu_flag))
	{
	  specbind (Qoverriding_terminal_local_map, Qnil);
	  specbind (Qoverriding_local_map, Qnil);
	}
      set_buffer_internal_1 (XBUFFER (buffer));

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      /* TODO: for some reason this is not needed in other terms,
           but some menu updates call Info-extract-pointer which causes
           abort-on-error if waiting-for-input.  Needs further investigation. */
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      owfi = waiting_for_input;
      waiting_for_input = 0;

      /* lucid hook and possible reset */
      safe_run_hooks (Qactivate_menubar_hook);
      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));

      /* Now ready to go */
      items = FRAME_MENU_BAR_ITEMS (f);

      /* Save the frame's previous menu bar contents data */
      if (previous_menu_items_used)
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	memcpy (previous_items, &AREF (f->menu_bar_vector, 0),
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		previous_menu_items_used * sizeof (Lisp_Object));
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      /* parse stage 1: extract from lisp */
      save_menu_items ();

      menu_items = f->menu_bar_vector;
      menu_items_allocated = VECTORP (menu_items) ? ASIZE (menu_items) : 0;
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      submenu_start = (int *) alloca (ASIZE (items) * sizeof (int *));
      submenu_end = (int *) alloca (ASIZE (items) * sizeof (int *));
      submenu_n_panes = (int *) alloca (ASIZE (items) * sizeof (int));
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      submenu_top_level_items
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	= (int *) alloca (ASIZE (items) * sizeof (int *));
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      init_menu_items ();
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      for (i = 0; i < ASIZE (items); i += 4)
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	{
	  Lisp_Object key, string, maps;

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	  key = AREF (items, i);
	  string = AREF (items, i + 1);
	  maps = AREF (items, i + 2);
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	  if (NILP (string))
	    break;

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          /* FIXME: we'd like to only parse the needed submenu, but this
               was causing crashes in the _common parsing code.. need to make
               sure proper initialization done.. */
/*        if (submenu && strcmp (submenuTitle, SDATA (string)))
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             continue; */

	  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;
          n++;
	}

      finish_menu_items ();
      waiting_for_input = owfi;


      if (submenu && n == 0)
        {
          /* should have found a menu for this one but didn't */
          fprintf (stderr, "ERROR: did not find lisp menu for submenu '%s'.\n",
                  submenuTitle);
	  discard_menu_items ();
	  unbind_to (specpdl_count, Qnil);
          [pool release];
          UNBLOCK_INPUT;
	  return;
        }

      /* parse stage 2: insert into lucid 'widget_value' structures
         [comments in other terms say not to evaluate lisp code here] */
      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 < 4*n; 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);

      /* Compare the new menu items with previous, and leave off if no change */
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      /* FIXME: following other terms here, but seems like this should be
           done before parse stage 2 above, since its results aren't used */
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      if (previous_menu_items_used
          && (!submenu || (submenu && submenu == last_submenu))
          && menu_items_used == previous_menu_items_used)
        {
          for (i = 0; i < previous_menu_items_used; i++)
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            /* FIXME: this ALWAYS fails on Buffers menu items.. something
                 about their strings causes them to change every time, so we
                 double-check failures */
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            if (!EQ (previous_items[i], AREF (menu_items, i)))
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              if (!(STRINGP (previous_items[i])
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                    && STRINGP (AREF (menu_items, i))
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                    && !strcmp (SDATA (previous_items[i]),
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				SDATA (AREF (menu_items, i)))))
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                  break;
          if (i == previous_menu_items_used)
            {
              /* No change.. */

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#if NSMENUPROFILE
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              ftime (&tb);
              t += 1000*tb.time+tb.millitm;
              fprintf (stderr, "NO CHANGE!  CUTTING OUT after %ld msec.\n", t);
#endif

              free_menubar_widget_value_tree (first_wv);
              discard_menu_items ();
              unbind_to (specpdl_count, Qnil);
              [pool release];
              UNBLOCK_INPUT;
              return;
            }
        }
      /* The menu items are different, so store them in the frame */
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      /* FIXME: this is not correct for single-submenu case */
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      f->menu_bar_vector = menu_items;
      f->menu_bar_items_used = menu_items_used;

      /* Calls restore_menu_items, etc., as they were outside */
      unbind_to (specpdl_count, Qnil);

      /* Parse stage 2a: now GC cannot happen during the lifetime of the
         widget_value, so it's safe to store data from a Lisp_String */
      wv = first_wv->contents;
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      for (i = 0; i < ASIZE (items); i += 4)
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	{
	  Lisp_Object string;
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	  string = AREF (items, i + 1);
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	  if (NILP (string))
	    break;
/*           if (submenu && strcmp (submenuTitle, SDATA (string)))
               continue; */

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	  wv->name = SSDATA (string);
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          update_submenu_strings (wv->contents);
	  wv = wv->next;
	}

      /* Now, update the NS menu; if we have a submenu, use that, otherwise
         create a new menu for each sub and fill it. */
      if (submenu)
        {
          for (wv = first_wv->contents; wv; wv = wv->next)
            {
              if (!strcmp (submenuTitle, wv->name))
                {
                  [submenu fillWithWidgetValue: wv->contents];
                  last_submenu = submenu;
                  break;
                }
            }
        }
      else
        {
          [menu fillWithWidgetValue: first_wv->contents];
        }

    }
  else
    {
      static int n_previous_strings = 0;
      static char previous_strings[100][10];
      static struct frame *last_f = NULL;
      int n;
      Lisp_Object string;

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      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;

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      /* Make widget-value tree w/ just the top level menu bar strings */
      items = FRAME_MENU_BAR_ITEMS (f);
      if (NILP (items))
        {
          [pool release];
          UNBLOCK_INPUT;
          return;
        }


      /* check if no change.. this mechanism is a bit rough, but ready */
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      n = ASIZE (items) / 4;
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      if (f == last_f && n_previous_strings == n)
        {
          for (i = 0; i<n; i++)
            {
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	      string = AREF (items, 4*i+1);
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              if (EQ (string, make_number (0))) // FIXME: Why???  --Stef
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                continue;
              if (NILP (string))
                if (previous_strings[i][0])
                  break;
              else
                continue;
              if (strncmp (previous_strings[i], SDATA (string), 10))
                break;
            }

          if (i == n)
            {
              [pool release];
              UNBLOCK_INPUT;
              return;
            }
        }

      [menu clear];
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      for (i = 0; i < ASIZE (items); i += 4)
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	{
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	  string = AREF (items, i + 1);
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	  if (NILP (string))
	    break;

          if (n < 100)
            strncpy (previous_strings[i/4], SDATA (string), 10);

	  wv = xmalloc_widget_value ();
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	  wv->name = SSDATA (string);
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	  wv->value = 0;
	  wv->enabled = 1;
	  wv->button_type = BUTTON_TYPE_NONE;
	  wv->help = Qnil;
	  wv->call_data = (void *) (EMACS_INT) (-1);

#ifdef NS_IMPL_COCOA
          /* we'll update the real copy under app menu when time comes */
          if (!strcmp ("Services", wv->name))
            {
              /* but we need to make sure it will update on demand */
              [svcsMenu setFrame: f];
            }
          else
#endif
          [menu addSubmenuWithTitle: wv->name forFrame: f];

	  if (prev_wv)
	    prev_wv->next = wv;
	  else
	    first_wv->contents = wv;
	  prev_wv = wv;
	}

      last_f = f;
      if (n < 100)
        n_previous_strings = n;
      else
        n_previous_strings = 0;

    }
  free_menubar_widget_value_tree (first_wv);


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#if NSMENUPROFILE
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  ftime (&tb);
  t += 1000*tb.time+tb.millitm;
  fprintf (stderr, "Menu update took %ld msec.\n", t);
#endif

  /* set main menu */
  if (needsSet)
    [NSApp setMainMenu: menu];

  [pool release];
  UNBLOCK_INPUT;

}


/* Main emacs core entry point for menubar menus: called to indicate that the
   frame's menus have changed, and the *step representation should be updated
   from Lisp. */
void
set_frame_menubar (struct frame *f, int first_time, int deep_p)
{
  ns_update_menubar (f, deep_p, nil);
}


/* ==========================================================================

    Menu: class implementation

   ========================================================================== */


/* Menu that can define itself from Emacs "widget_value"s and will lazily
   update itself when user clicked.  Based on Carbon/AppKit implementation
   by Yamamoto Mitsuharu. */
@implementation EmacsMenu

/* override designated initializer */
- initWithTitle: (NSString *)title
{
  if (self = [super initWithTitle: title])
    [self setAutoenablesItems: NO];
  return self;
}


/* used for top-level */
- initWithTitle: (NSString *)title frame: (struct frame *)f
{
  [self initWithTitle: title];
  frame = f;
#ifdef NS_IMPL_COCOA
  [self setDelegate: self];
#endif
  return self;
}


- (void)setFrame: (struct frame *)f
{
  frame = f;
}


/* delegate method called when a submenu is being opened: run a 'deep' call
   to set_frame_menubar */
- (void)menuNeedsUpdate: (NSMenu *)menu
{
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  NSEvent *event;
  if (!FRAME_LIVE_P (frame))
    return;
  event = [[FRAME_NS_VIEW (frame) window] currentEvent];
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  /* HACK: Cocoa/Carbon will request update on every keystroke
     via IsMenuKeyEvent -> CheckMenusForKeyEvent.  These are not needed
     since key equivalents are handled through emacs.
     On Leopard, even keystroke events generate SystemDefined events, but
     their subtype is 8. */
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  if ([event type] != NSSystemDefined || [event subtype] == 8
      /* Also, don't try this if from an event picked up asynchronously,
         as lots of lisp evaluation happens in ns_update_menubar. */
      || handling_signal != 0)
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    return;
/*fprintf (stderr, "Updating menu '%s'\n", [[self title] UTF8String]); NSLog (@"%@\n", event); */
  ns_update_menubar (frame, 1, self);
}


- (BOOL)performKeyEquivalent: (NSEvent *)theEvent
{
  if (SELECTED_FRAME () && FRAME_NS_P (SELECTED_FRAME ())
      && FRAME_NS_VIEW (SELECTED_FRAME ()))
    [FRAME_NS_VIEW (SELECTED_FRAME ()) keyDown: theEvent];
  return YES;
}


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/* Parse a widget_value's key rep (examples: 's-p', 's-S', '(C-x C-s)', '<f13>')
   into an accelerator string.  We are only able to display a single character
   for an accelerator, together with an optional modifier combination.  (Under
   Carbon more control was possible, but in Cocoa multi-char strings passed to
   NSMenuItem get ignored.  For now we try to display a super-single letter
   combo, and return the others as strings to be appended to the item title.
   (This is signaled by setting keyEquivModMask to 0 for now.) */
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-(NSString *)parseKeyEquiv: (const char *)key
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{
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  const char *tpos = key;
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  keyEquivModMask = NSCommandKeyMask;

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  if (!key || !strlen (key))
    return @"";
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  while (*tpos == ' ' || *tpos == '(')
    tpos++;
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  if ((*tpos == 's') && (*(tpos+1) == '-'))
    {
      return [NSString stringWithFormat: @"%c", tpos[2]];
    }
  keyEquivModMask = 0; /* signal */
  return [NSString stringWithUTF8String: tpos];
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}

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- (NSMenuItem *)addItemWithWidgetValue: (void *)wvptr
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{
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  NSMenuItem *item;
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  widget_value *wv = (widget_value *)wvptr;

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  if (menu_separator_name_p (wv->name))
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    {
      item = [NSMenuItem separatorItem];
      [self addItem: item];
    }
  else
    {
      NSString *title, *keyEq;
      title = [NSString stringWithUTF8String: wv->name];
      if (title == nil)
        title = @"< ? >";  /* (get out in the open so we know about it) */

      keyEq = [self parseKeyEquiv: wv->key];
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#ifdef NS_IMPL_COCOA
      /* OS X just ignores modifier strings longer than one character */
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      if (keyEquivModMask == 0)
        title = [title stringByAppendingFormat: @" (%@)", keyEq];
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#endif
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      item = [self addItemWithTitle: (NSString *)title
                             action: @selector (menuDown:)
                      keyEquivalent: keyEq];
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      [item setKeyEquivalentModifierMask: keyEquivModMask];
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      [item setEnabled: wv->enabled];

      /* Draw radio buttons and tickboxes */
      if (wv->selected && (wv->button_type == BUTTON_TYPE_TOGGLE ||
                           wv->button_type == BUTTON_TYPE_RADIO))
        [item setState: NSOnState];
      else
        [item setState: NSOffState];

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      [item setTag: (NSInteger)wv->call_data];
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    }

  return item;
}


/* convenience */
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-(void)clear
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{
  int n;
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  for (n = [self numberOfItems]-1; n >= 0; n--)
    {
      NSMenuItem *item = [self itemAtIndex: n];
      NSString *title = [item title];
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      if (([title length] == 0  /* OSX 10.5 */
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	   || [ns_app_name isEqualToString: title]  /* from 10.6 on */
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	   || [@"Apple" isEqualToString: title]) /* older */
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          && ![item isSeparatorItem])
        continue;
      [self removeItemAtIndex: n];
    }
}


- (void)fillWithWidgetValue: (void *)wvptr
{
  widget_value *wv = (widget_value *)wvptr;

  /* clear existing contents */
  [self setMenuChangedMessagesEnabled: NO];
  [self clear];

  /* add new contents */
  for (; wv != NULL; wv = wv->next)
    {
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      NSMenuItem *item = [self addItemWithWidgetValue: wv];
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      if (wv->contents)
        {
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          EmacsMenu *submenu = [[EmacsMenu alloc] initWithTitle: [item title]];
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          [self setSubmenu: submenu forItem: item];
          [submenu fillWithWidgetValue: wv->contents];
          [submenu release];
          [item setAction: nil];
        }
    }

  [self setMenuChangedMessagesEnabled: YES];
#ifdef NS_IMPL_GNUSTEP
  if ([[self window] isVisible])
    [self sizeToFit];
#else
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#if MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_2
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  if ([self supermenu] == nil)
    [self sizeToFit];
#endif
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#endif
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}


/* adds an empty submenu and returns it */
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- (EmacsMenu *)addSubmenuWithTitle: (const char *)title forFrame: (struct frame *)f
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{
  NSString *titleStr = [NSString stringWithUTF8String: title];
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  NSMenuItem *item = [self addItemWithTitle: titleStr
                                     action: nil /*@selector (menuDown:) */
                              keyEquivalent: @""];
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  EmacsMenu *submenu = [[EmacsMenu alloc] initWithTitle: titleStr frame: f];
  [self setSubmenu: submenu forItem: item];
  [submenu release];
  return submenu;
}

/* run a menu in popup mode */
- (Lisp_Object)runMenuAt: (NSPoint)p forFrame: (struct frame *)f
                 keymaps: (int)keymaps
{
  EmacsView *view = FRAME_NS_VIEW (f);
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  NSEvent *e, *event;
  long retVal;

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/*   p = [view convertPoint:p fromView: nil]; */
  p.y = NSHeight ([view frame]) - p.y;
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  e = [[view window] currentEvent];
   event = [NSEvent mouseEventWithType: NSRightMouseDown
                              location: p
                         modifierFlags: 0
                             timestamp: [e timestamp]
                          windowNumber: [[view window] windowNumber]
                               context: [e context]
                           eventNumber: 0/*[e eventNumber] */
                            clickCount: 1
                              pressure: 0];
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  context_menu_value = -1;
  [NSMenu popUpContextMenu: self withEvent: event forView: view];
  retVal = context_menu_value;
  context_menu_value = 0;
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  return retVal > 0
      ? find_and_return_menu_selection (f, keymaps, (void *)retVal)
      : Qnil;
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}

@end  /* EmacsMenu */



/* ==========================================================================

    Context Menu: implementing functions

   ========================================================================== */

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Lisp_Object
ns_menu_show (FRAME_PTR f, int x, int y, int for_click, int keymaps,
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	      Lisp_Object title, const char **error)
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{
  EmacsMenu *pmenu;
  NSPoint p;
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  Lisp_Object window, tem, keymap;
  int specpdl_count = SPECPDL_INDEX ();
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  widget_value *wv, *first_wv = 0;

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  p.x = x; p.y = y;
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  /* now parse stage 2 as in ns_update_menubar */
  wv = xmalloc_widget_value ();
  wv->name = "contextmenu";
  wv->value = 0;
  wv->enabled = 1;
  wv->button_type = BUTTON_TYPE_NONE;
  wv->help = Qnil;
  first_wv = wv;

#if 0
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  /* FIXME: a couple of one-line differences prevent reuse */
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  wv = digest_single_submenu (0, menu_items_used, Qnil);
#else
  {
  widget_value *save_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 = 1;
  int i;

  /* Loop over all panes and items, filling in the tree.  */
  i = 0;
  while (i < menu_items_used)
    {
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      if (EQ (AREF (menu_items, i), Qnil))
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	{
	  submenu_stack[submenu_depth++] = save_wv;
	  save_wv = prev_wv;
	  prev_wv = 0;
	  first_pane = 1;
	  i++;
	}
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      else if (EQ (AREF (menu_items, i), Qlambda))
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	{
	  prev_wv = save_wv;
	  save_wv = submenu_stack[--submenu_depth];
	  first_pane = 0;
	  i++;
	}
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      else if (EQ (AREF (menu_items, i), Qt)
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	       && submenu_depth != 0)
	i += MENU_ITEMS_PANE_LENGTH;
      /* Ignore a nil in the item list.
	 It's meaningful only for dialog boxes.  */
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      else if (EQ (AREF (menu_items, i), Qquote))
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	i += 1;
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      else if (EQ (AREF (menu_items, i), Qt))
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	{
	  /* Create a new pane.  */
	  Lisp_Object pane_name, prefix;
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	  const char *pane_string;
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	  pane_name = AREF (menu_items, i + MENU_ITEMS_PANE_NAME);
	  prefix = AREF (menu_items, i + MENU_ITEMS_PANE_PREFIX);

#ifndef HAVE_MULTILINGUAL_MENU
	  if (STRINGP (pane_name) && STRING_MULTIBYTE (pane_name))
	    {
	      pane_name = ENCODE_MENU_STRING (pane_name);
	      ASET (menu_items, i + MENU_ITEMS_PANE_NAME, pane_name);
	    }
#endif
	  pane_string = (NILP (pane_name)
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			 ? "" : SSDATA (pane_name));
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	  /* 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);

#ifndef HAVE_MULTILINGUAL_MENU
          if (STRINGP (item_name) && STRING_MULTIBYTE (item_name))
	    {
	      item_name = ENCODE_MENU_STRING (item_name);
	      ASET (menu_items, i + MENU_ITEMS_ITEM_NAME, item_name);
	    }

          if (STRINGP (descrip) && STRING_MULTIBYTE (descrip))
	    {
	      descrip = ENCODE_MENU_STRING (descrip);
	      ASET (menu_items, i + MENU_ITEMS_ITEM_EQUIV_KEY, descrip);
	    }
#endif /* not HAVE_MULTILINGUAL_MENU */

	  wv = xmalloc_widget_value ();
	  if (prev_wv)
	    prev_wv->next = wv;
	  else
	    save_wv->contents = wv;
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	  wv->name = SSDATA (item_name);
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	  if (!NILP (descrip))
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	    wv->key = SSDATA (descrip);
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	  wv->value = 0;
	  /* If this item has a null value,
	     make the call_data null so that it won't display a box
	     when the mouse is on it.  */
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	  wv->call_data
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	      = !NILP (def) ? (void *) &AREF (menu_items, i) : 0;
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	  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;
	}
    }
  }
#endif

  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;

#ifndef HAVE_MULTILINGUAL_MENU
      if (STRING_MULTIBYTE (title))
	title = ENCODE_MENU_STRING (title);
#endif

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      wv_title->name = SSDATA (title);
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      wv_title->enabled = NO;
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      wv_title->button_type = BUTTON_TYPE_NONE;
      wv_title->help = Qnil;
      wv_title->next = wv_sep;
      first_wv->contents = wv_title;
    }

  pmenu = [[EmacsMenu alloc] initWithTitle:
                               [NSString stringWithUTF8String: SDATA (title)]];
  [pmenu fillWithWidgetValue: first_wv->contents];
  free_menubar_widget_value_tree (first_wv);
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  unbind_to (specpdl_count, Qnil);
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  popup_activated_flag = 1;
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  tem = [pmenu runMenuAt: p forFrame: f keymaps: keymaps];
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  popup_activated_flag = 0;
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  [[FRAME_NS_VIEW (SELECTED_FRAME ()) window] makeKeyWindow];

  return tem;
}


/* ==========================================================================

    Toolbar: externally-called functions

   ========================================================================== */

void
free_frame_tool_bar (FRAME_PTR f)
/* --------------------------------------------------------------------------
    Under NS we just hide the toolbar until it might be needed again.
   -------------------------------------------------------------------------- */
{
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  BLOCK_INPUT;
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  [[FRAME_NS_VIEW (f) toolbar] setVisible: NO];
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  FRAME_TOOLBAR_HEIGHT (f) = 0;
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  UNBLOCK_INPUT;
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}

void
update_frame_tool_bar (FRAME_PTR f)
/* --------------------------------------------------------------------------
    Update toolbar contents
   -------------------------------------------------------------------------- */
{
  int i;
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  EmacsView *view = FRAME_NS_VIEW (f);
  NSWindow *window = [view window];
  EmacsToolbar *toolbar = [view toolbar];
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  BLOCK_INPUT;
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  [toolbar clearActive];

  /* update EmacsToolbar as in GtkUtils, build items list */
  for (i = 0; i < f->n_tool_bar_items; ++i)
    {
#define TOOLPROP(IDX) AREF (f->tool_bar_items, \
                            i * TOOL_BAR_ITEM_NSLOTS + (IDX))

      BOOL enabled_p = !NILP (TOOLPROP (TOOL_BAR_ITEM_ENABLED_P));
      BOOL selected_p = !NILP (TOOLPROP (TOOL_BAR_ITEM_SELECTED_P));
      int idx;
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      ptrdiff_t img_id;
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      struct image *img;
      Lisp_Object image;
      Lisp_Object helpObj;
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      const char *helpText;
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      /* If image is a vector, choose the image according to the
	 button state.  */
      image = TOOLPROP (TOOL_BAR_ITEM_IMAGES);
      if (VECTORP (image))
	{
          /* NS toolbar auto-computes disabled and selected images */
          idx = TOOL_BAR_IMAGE_ENABLED_SELECTED;
	  xassert (ASIZE (image) >= idx);
	  image = AREF (image, idx);
	}
      else
        {
          idx = -1;
        }
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      helpObj = TOOLPROP (TOOL_BAR_ITEM_HELP);
      if (NILP (helpObj))
        helpObj = TOOLPROP (TOOL_BAR_ITEM_CAPTION);
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      helpText = NILP (helpObj) ? "" : SSDATA (helpObj);
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      /* Ignore invalid image specifications.  */
      if (!valid_image_p (image))
        {
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          /* Don't log anything, GNUS makes invalid images all the time.  */
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          continue;
        }

      img_id = lookup_image (f, image);
      img = IMAGE_FROM_ID (f, img_id);
      prepare_image_for_display (f, img);

      if (img->load_failed_p || img->pixmap == nil)
        {
          NSLog (@"Could not prepare toolbar image for display.");
          continue;
        }

      [toolbar addDisplayItemWithImage: img->pixmap idx: i helpText: helpText
                               enabled: enabled_p];
#undef TOOLPROP
    }

  if (![toolbar isVisible])
      [toolbar setVisible: YES];

  if ([toolbar changed])
    {
      /* inform app that toolbar has changed */
      NSDictionary *dict = [toolbar configurationDictionary];
      NSMutableDictionary *newDict = [dict mutableCopy];
      NSEnumerator *keys = [[dict allKeys] objectEnumerator];
      NSObject *key;
      while ((key = [keys nextObject]) != nil)
        {
          NSObject *val = [dict objectForKey: key];
          if ([val isKindOfClass: [NSArray class]])
            {
              [newDict setObject:
                         [toolbar toolbarDefaultItemIdentifiers: toolbar]
                          forKey: key];
              break;
            }
        }
      [toolbar setConfigurationFromDictionary: newDict];
      [newDict release];
    }

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  FRAME_TOOLBAR_HEIGHT (f) =
    NSHeight ([window frameRectForContentRect: NSMakeRect (0, 0, 0, 0)])
    - FRAME_NS_TITLEBAR_HEIGHT (f);
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  UNBLOCK_INPUT;
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}


/* ==========================================================================

    Toolbar: class implementation

   ========================================================================== */

@implementation EmacsToolbar

- initForView: (EmacsView *)view withIdentifier: (NSString *)identifier
{
  self = [super initWithIdentifier: identifier];
  emacsView = view;
  [self setDisplayMode: NSToolbarDisplayModeIconOnly];
  [self setSizeMode: NSToolbarSizeModeSmall];
  [self setDelegate: self];
  identifierToItem = [[NSMutableDictionary alloc] initWithCapacity: 10];
  activeIdentifiers = [[NSMutableArray alloc] initWithCapacity: 8];
  prevEnablement = enablement = 0L;
  return self;
}

- (void)dealloc
{
  [prevIdentifiers release];
  [activeIdentifiers release];
  [identifierToItem release];
  [super dealloc];
}

- (void) clearActive
{
  [prevIdentifiers release];
  prevIdentifiers = [activeIdentifiers copy];
  [activeIdentifiers removeAllObjects];
  prevEnablement = enablement;
  enablement = 0L;
}

- (BOOL) changed
{
  return [activeIdentifiers isEqualToArray: prevIdentifiers] &&
    enablement == prevEnablement ? NO : YES;
}

- (void) addDisplayItemWithImage: (EmacsImage *)img idx: (int)idx
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                        helpText: (const char *)help enabled: (BOOL)enabled
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{
  /* 1) come up w/identifier */
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  NSString *identifier
      = [NSString stringWithFormat: @"%u", [img hash]];
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  /* 2) create / reuse item */
  NSToolbarItem *item = [identifierToItem objectForKey: identifier];
  if (item == nil)
    {
      item = [[[NSToolbarItem alloc] initWithItemIdentifier: identifier]
               autorelease];
      [item setImage: img];
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      [item setToolTip: [NSString stringWithUTF8String: help]];
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      [item setTarget: emacsView];
      [item setAction: @selector (toolbarClicked:)];
    }

  [item setTag: idx];
  [item setEnabled: enabled];

  /* 3) update state */
  [identifierToItem setObject: item forKey: identifier];
  [activeIdentifiers addObject: identifier];
  enablement = (enablement << 1) | (enabled == YES);
}

/* This overrides super's implementation, which automatically sets
   all items to enabled state (for some reason). */
- (void)validateVisibleItems { }


/* delegate methods */

- (NSToolbarItem *)toolbar: (NSToolbar *)toolbar
      itemForItemIdentifier: (NSString *)itemIdentifier
  willBeInsertedIntoToolbar: (BOOL)flag
{
  /* look up NSToolbarItem by identifier and return... */
  return [identifierToItem objectForKey: itemIdentifier];
}

- (NSArray *)toolbarDefaultItemIdentifiers: (NSToolbar *)toolbar
{
  /* return entire set.. */
  return activeIdentifiers;
}

/* for configuration palette (not yet supported) */
- (NSArray *)toolbarAllowedItemIdentifiers: (NSToolbar *)toolbar
{
  /* return entire set... */
  return [identifierToItem allKeys];
}

/* optional and unneeded */
/* - toolbarWillAddItem: (NSNotification *)notification { } */
/* - toolbarDidRemoveItem: (NSNotification *)notification { } */
/* - (NSArray *)toolbarSelectableItemIdentifiers: (NSToolbar *)toolbar */

@end  /* EmacsToolbar */



/* ==========================================================================

    Tooltip: class implementation

   ========================================================================== */

/* Needed because NeXTstep does not provide enough control over tooltip
   display. */
@implementation EmacsTooltip

- init
{
  NSColor *col = [NSColor colorWithCalibratedRed: 1.0 green: 1.0
                                            blue: 0.792 alpha: 0.95];
  NSFont *font = [NSFont toolTipsFontOfSize: 0];
  NSFont *sfont = [font screenFont];
  int height = [sfont ascender] - [sfont descender];
/*[font boundingRectForFont].size.height; */
  NSRect r = NSMakeRect (0, 0, 100, height+6);

  textField = [[NSTextField alloc] initWithFrame: r];
  [textField setFont: font];
  [textField setBackgroundColor: col];

  [textField setEditable: NO];
  [textField setSelectable: NO];
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  [textField setBordered: NO];
  [textField setBezeled: NO];
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  [textField setDrawsBackground: YES];

  win = [[NSWindow alloc]
            initWithContentRect: [textField frame]
                      styleMask: 0
                        backing: NSBackingStoreBuffered
                          defer: YES];
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  [win setHasShadow: YES];
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  [win setReleasedWhenClosed: NO];
  [win setDelegate: self];
  [[win contentView] addSubview: textField];
/*  [win setBackgroundColor: col]; */
  [win setOpaque: NO];

  return self;
}

- (void) dealloc
{
  [win close];
  [win release];
  [textField release];
  [super dealloc];
}

- (void) setText: (char *)text
{
  NSString *str = [NSString stringWithUTF8String: text];
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  NSRect r  = [textField frame];
  NSSize tooltipDims;

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  [textField setStringValue: str];
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  tooltipDims = [[textField cell] cellSize];

  r.size.width = tooltipDims.width;
  r.size.height = tooltipDims.height;
  [textField setFrame: r];
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}

- (void) showAtX: (int)x Y: (int)y for: (int)seconds
{
  NSRect wr = [win frame];

  wr.origin = NSMakePoint (x, y);
  wr.size = [textField frame].size;

  [win setFrame: wr display: YES];
  [win orderFront: self];
  [win display];
  timer = [NSTimer scheduledTimerWithTimeInterval: (float)seconds target: self
                                         selector: @selector (hide)
                                         userInfo: nil repeats: NO];
  [timer retain];
}

- (void) hide
{
  [win close];
  if (timer != nil)
    {
      if ([timer isValid])
        [timer invalidate];
      [timer release];
      timer = nil;
    }
}

- (BOOL) isActive
{
  return timer != nil;
}

- (NSRect) frame
{
  return [textField frame];
}

@end  /* EmacsTooltip */



/* ==========================================================================

    Popup Dialog: implementing functions

   ========================================================================== */

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static Lisp_Object
pop_down_menu (Lisp_Object arg)
{
  struct Lisp_Save_Value *p = XSAVE_VALUE (arg);
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  if (popup_activated_flag)
    {
      popup_activated_flag = 0;
      BLOCK_INPUT;
      [NSApp endModalSession: popupSession];
      [((EmacsDialogPanel *) (p->pointer)) close];
      [[FRAME_NS_VIEW (SELECTED_FRAME ()) window] makeKeyWindow];
      UNBLOCK_INPUT;
    }
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  return Qnil;
}


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Lisp_Object
ns_popup_dialog (Lisp_Object position, Lisp_Object contents, Lisp_Object header)
{
  id dialog;
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  Lisp_Object window, tem, title;
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  struct frame *f;
  NSPoint p;
  BOOL isQ;

  NSTRACE (x-popup-dialog);
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  check_ns ();

  isQ = NILP (header);

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  if (EQ (position, Qt)
      || (CONSP (position) && (EQ (XCAR (position), Qmenu_bar)
                               || EQ (XCAR (position), Qtool_bar))))
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    {
      window = selected_window;
    }
  else if (CONSP (position))
    {
      Lisp_Object tem;
      tem = Fcar (position);
      if (XTYPE (tem) == Lisp_Cons)
        window = Fcar (Fcdr (position));
      else
        {
          tem = Fcar (Fcdr (position));  /* EVENT_START (position) */
          window = Fcar (tem);	     /* POSN_WINDOW (tem) */
        }
    }
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  else if (WINDOWP (position) || FRAMEP (position))
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    {
      window = position;
    }
  else
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    window = Qnil;

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  if (FRAMEP (window))
    f = XFRAME (window);