xmenu.c 10.4 KB
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/* X Communication module for terminals which understand the X protocol.
   Copyright (C) 1986, 1988 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA.  */

/* X pop-up deck-of-cards menu facility for gnuemacs.
 *
 * Written by Jon Arnold and Roman Budzianowski
 * Mods and rewrite by Robert Krawitz
 *
 */

#ifdef XDEBUG
#include <stdio.h>
#endif

/* On 4.3 this loses if it comes after xterm.h.  */
#include <signal.h>
#include "config.h"
#include "lisp.h"
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#include "frame.h"
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#include "window.h"

/* This may include sys/types.h, and that somehow loses
   if this is not done before the other system files.  */
#include "xterm.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"

#ifdef HAVE_X11
#include "../oldXMenu/XMenu.h"
#else
#include <X/XMenu.h>
#endif

#define min(x,y) (((x) < (y)) ? (x) : (y))
#define max(x,y) (((x) > (y)) ? (x) : (y))

#define NUL 0

#ifndef TRUE
#define TRUE 1
#define FALSE 0
#endif TRUE

#ifdef HAVE_X11
extern Display *x_current_display;
#else
#define	ButtonReleaseMask ButtonReleased
#endif /* not HAVE_X11 */

Lisp_Object xmenu_show ();
extern int x_error_handler ();

/*************************************************************/

#if 0
/* Ignoring the args is easiest.  */
xmenu_quit ()
{
  error ("Unknown XMenu error");
}
#endif

DEFUN ("x-popup-menu",Fx_popup_menu, Sx_popup_menu, 1, 2, 0,
  "Pop up a deck-of-cards menu and return user's selection.\n\
ARG is a position specification: a list ((XOFFSET YOFFSET) WINDOW)\n\
where XOFFSET and YOFFSET are positions in characters from the top left\n\
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corner of WINDOW's frame.  A mouse-event list will serve for this.\n\
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This controls the position of the center of the first line\n\
in the first pane of the menu, not the top left of the menu as a whole.\n\
\n\
MENU is a specifier for a menu.  It is a list of the form\n\
\(TITLE PANE1 PANE2...), and each pane is a list of form\n\
\(TITLE (LINE ITEM)...).  Each line should be a string, and item should\n\
be the return value for that line (i.e. if it is selected.")
       (arg, menu)
     Lisp_Object arg, menu;
{
  int number_of_panes;
  Lisp_Object XMenu_return;
  int XMenu_xpos, XMenu_ypos;
  char **menus;
  char ***names;
  Lisp_Object **obj_list;
  int *items;
  char *title;
  char *error_name;
  Lisp_Object ltitle, selection;
  int i, j;
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  FRAME_PTR f;
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  Lisp_Object x, y, window;

  window = Fcar (Fcdr (arg));
  x = Fcar (Fcar (arg));
  y = Fcar (Fcdr (Fcar (arg)));
  CHECK_WINDOW (window, 0);
  CHECK_NUMBER (x, 0);
  CHECK_NUMBER (y, 0);
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  f = XFRAME (WINDOW_FRAME (XWINDOW (window)));
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  XMenu_xpos = FONT_WIDTH (f->display.x->font) * XINT (x);
  XMenu_ypos = FONT_HEIGHT (f->display.x->font) * XINT (y);
  XMenu_xpos += f->display.x->left_pos;
  XMenu_ypos += f->display.x->top_pos;
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  ltitle = Fcar (menu);
  CHECK_STRING (ltitle, 1);
  title = (char *) XSTRING (ltitle)->data;
  number_of_panes=list_of_panes (&obj_list, &menus, &names, &items, Fcdr (menu));
#ifdef XDEBUG
  fprintf (stderr, "Panes= %d\n", number_of_panes);
  for (i=0; i < number_of_panes; i++)
    {
      fprintf (stderr, "Pane %d lines %d title %s\n", i, items[i], menus[i]);
      for (j=0; j < items[i]; j++)
	{
	  fprintf (stderr, "    Item %d %s\n", j, names[i][j]);
	}
    }
#endif
  BLOCK_INPUT;
  selection = xmenu_show (ROOT_WINDOW, XMenu_xpos, XMenu_ypos, names, menus,
			  items, number_of_panes, obj_list, title, &error_name);
  UNBLOCK_INPUT;
  /** fprintf (stderr, "selection = %x\n", selection);  **/
  if (selection != NUL)
    {				/* selected something */
      XMenu_return = selection;
    }
  else
    {				/* nothing selected */
      XMenu_return = Qnil;
    }
  /* now free up the strings */
  for (i=0; i < number_of_panes; i++)
    {
      free (names[i]);
      free (obj_list[i]);
    }
  free (menus);
  free (obj_list);
  free (names);
  free (items);
  /*   free (title); */
  if (error_name) error (error_name);
  return XMenu_return;
}

struct indices {
  int pane;
  int line;
};

Lisp_Object
xmenu_show (parent, startx, starty, line_list, pane_list, line_cnt,
		      pane_cnt, item_list, title, error)
     Window parent;		
     int startx, starty;	/* upper left corner position BROKEN */
     char **line_list[];   	/* list of strings for items */
     char *pane_list[];		/* list of pane titles */
     char *title;
     int pane_cnt;		/* total number of panes */
     Lisp_Object *item_list[];	/* All items */
     int line_cnt[];		/* Lines in each pane */
     char **error;		/* Error returned */
{
  XMenu *GXMenu;
  int last, panes, selidx, lpane, status;
  int lines, sofar;
  Lisp_Object entry;
  /* struct indices *datap, *datap_save; */
  char *datap;
  int ulx, uly, width, height;
  int dispwidth, dispheight;
  
  *error = (char *) 0;		/* Initialize error pointer to null */
  GXMenu = XMenuCreate (XDISPLAY parent, "emacs");
  if (GXMenu == NUL)
    {
      *error = "Can't create menu";
      return (0);
    }
  
  for (panes=0, lines=0; panes < pane_cnt; lines += line_cnt[panes], panes++)
    ;
  /* datap = (struct indices *) xmalloc (lines * sizeof (struct indices)); */
  /*datap = (char *) xmalloc (lines * sizeof (char));
    datap_save = datap;*/
  
  for (panes = 0, sofar=0;panes < pane_cnt;sofar +=line_cnt[panes], panes++)
    {
      /* create all the necessary panes */
      lpane = XMenuAddPane (XDISPLAY GXMenu, pane_list[panes], TRUE);
      if (lpane == XM_FAILURE)
	{
	  XMenuDestroy (XDISPLAY GXMenu);
	  *error = "Can't create pane";
	  return (0);
	}
      for (selidx = 0; selidx < line_cnt[panes] ; selidx++)
	{
	  /* add the selection stuff to the menus */
	  /* datap[selidx+sofar].pane = panes;
	     datap[selidx+sofar].line = selidx; */
	  if (XMenuAddSelection (XDISPLAY GXMenu, lpane, 0,
				 line_list[panes][selidx], TRUE)
	      == XM_FAILURE)
	    {
	      XMenuDestroy (XDISPLAY GXMenu);
	      /* free (datap); */
	      *error = "Can't add selection to menu";
	      /* error ("Can't add selection to menu"); */
	      return (0);
	    }
	}
    }
  /* all set and ready to fly */
  XMenuRecompute (XDISPLAY GXMenu);
  dispwidth = DisplayWidth (x_current_display, XDefaultScreen (x_current_display));
  dispheight = DisplayHeight (x_current_display, XDefaultScreen (x_current_display));
  startx = min (startx, dispwidth);
  starty = min (starty, dispheight);
  startx = max (startx, 1);
  starty = max (starty, 1);
  XMenuLocate (XDISPLAY GXMenu, 0, 0, startx, starty,
	       &ulx, &uly, &width, &height);
  if (ulx+width > dispwidth)
    {
      startx -= (ulx + width) - dispwidth;
      ulx = dispwidth - width;
    }
  if (uly+height > dispheight)
    {
      starty -= (uly + height) - dispheight;
      uly = dispheight - height;
    }
  if (ulx < 0) startx -= ulx;
  if (uly < 0) starty -= uly;
    
  XMenuSetFreeze (GXMenu, TRUE);
  panes = selidx = 0;
  
  status = XMenuActivate (XDISPLAY GXMenu, &panes, &selidx,
			  startx, starty, ButtonReleaseMask, &datap);
  switch (status)
    {
    case XM_SUCCESS:
#ifdef XDEBUG
      fprintf (stderr, "pane= %d line = %d\n", panes, selidx);
#endif
      entry = item_list[panes][selidx];
      break;
    case XM_FAILURE:
      /*free (datap_save); */
      XMenuDestroy (XDISPLAY GXMenu);
      *error = "Can't activate menu";
      /* error ("Can't activate menu"); */
    case XM_IA_SELECT:
    case XM_NO_SELECT:
      entry = Qnil;
      break;
    }
  XMenuDestroy (XDISPLAY GXMenu);
  /*free (datap_save);*/
  return (entry);
}

syms_of_xmenu ()
{
  defsubr (&Sx_popup_menu);
}

list_of_panes (vector, panes, names, items, menu)
     Lisp_Object ***vector;	/* RETURN all menu objects */
     char ***panes;		/* RETURN pane names */
     char ****names;		/* RETURN all line names */
     int **items;		/* RETURN number of items per pane */
     Lisp_Object menu;
{
  Lisp_Object tail, item, item1;
  int i;
  
  if (XTYPE (menu) != Lisp_Cons) menu = wrong_type_argument (Qlistp, menu);

  i= XFASTINT (Flength (menu, 1));

  *vector = (Lisp_Object **) xmalloc (i * sizeof (Lisp_Object *));
  *panes = (char **) xmalloc (i * sizeof (char *));
  *items = (int *) xmalloc (i * sizeof (int));
  *names = (char ***) xmalloc (i * sizeof (char **));

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  for (i=0, tail = menu; !NILP (tail); tail = Fcdr (tail), i++)
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    {
       item = Fcdr (Fcar (tail));
       if (XTYPE (item) != Lisp_Cons) (void) wrong_type_argument (Qlistp, item);
#ifdef XDEBUG
       fprintf (stderr, "list_of_panes check tail, i=%d\n", i);
#endif
       item1 = Fcar (Fcar (tail));
       CHECK_STRING (item1, 1);
#ifdef XDEBUG
       fprintf (stderr, "list_of_panes check pane, i=%d%s\n", i,
		XSTRING (item1)->data);
#endif
       (*panes)[i] = (char *) XSTRING (item1)->data;
       (*items)[i] = list_of_items ((*vector)+i, (*names)+i, item);
       /* (*panes)[i] = (char *) xmalloc ((XSTRING (item1)->size)+1);
	  bcopy (XSTRING (item1)->data, (*panes)[i], XSTRING (item1)->size + 1)
	  ; */
    }
  return i;
}
     

list_of_items (vector, names, pane)  /* get list from emacs and put to vector */
     Lisp_Object **vector;	/* RETURN menu "objects" */
     char ***names;		/* RETURN line names */
     Lisp_Object pane;
{
  Lisp_Object tail, item, item1;
  int i;

  if (XTYPE (pane) != Lisp_Cons) pane = wrong_type_argument (Qlistp, pane);

  i= XFASTINT (Flength (pane, 1));

  *vector = (Lisp_Object *) xmalloc (i * sizeof (Lisp_Object));
  *names = (char **) xmalloc (i * sizeof (char *));

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  for (i=0, tail = pane; !NILP (tail); tail = Fcdr (tail), i++)
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    {
       item = Fcar (tail);
       if (XTYPE (item) != Lisp_Cons) (void) wrong_type_argument (Qlistp, item);
#ifdef XDEBUG
       fprintf (stderr, "list_of_items check tail, i=%d\n", i);
#endif
       (*vector)[i] =  Fcdr (item);
       item1 = Fcar (item);
       CHECK_STRING (item1, 1);
#ifdef XDEBUG
       fprintf (stderr, "list_of_items check item, i=%d%s\n", i,
		XSTRING (item1)->data);
#endif
       (*names)[i] = (char *) XSTRING (item1)->data;
    }
  return i;
}