view src/objects-impl.h @ 4502:8748a3f7ceb4

Handle varalias chains, custom variables in #'user-variable-p. src/ChangeLog addition: 2008-08-23 Aidan Kehoe <kehoea@parhasard.net> * eval.c (Fuser_variable_p): Moved to symbols.c * symbols.c (Fcustom_variable_p): Moved here from custom.el. (user_variable_alias_check_fun): Mapper function used in `user-variable-p'. (Fuser_variable_p): Moved here from eval.c, to allow it to examine the variable alias chain. Expanded to check each entry in the variable alias chain for signs of being a user variable; documentation updated, noting the differences between GNU's behaviour and ours (ours is a little more sensible) (map_varalias_chain): New. Given a C function, call it at least once for each symbol in a symbol's varalias chain, signalling an error if there's a cycle, and returning immediately if the function returns something other than Qzero. (Fdefvaralias): Correct the use of the word "alias" in the docstring and in the argument name. Motivate this in a comment. Add support for a DOCSTRING argument, something GNU has too, and document this * gc.c (vars_of_gc): Start the docstring of `garbage-collection-messages' with an asterisk, to indicate that it's a user variable. lisp/ChangeLog addition: 2008-08-23 Aidan Kehoe <kehoea@parhasard.net> * custom.el: Move #'custom-variable-p to C, since it's now called from #'user-variable-p.
author Aidan Kehoe <kehoea@parhasard.net>
date Sat, 23 Aug 2008 16:38:51 +0200
parents ad2f4ae9895b
children 5502045ec510 d1247f3cc363
line wrap: on
line source

/* Generic object functions -- header implementation.
   Copyright (C) 1995 Board of Trustees, University of Illinois.
   Copyright (C) 1995, 1996, 2002 Ben Wing.

This file is part of XEmacs.

XEmacs 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.

XEmacs 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 XEmacs; see the file COPYING.  If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.  */

/* Synched up with: Not in FSF. */

#ifndef INCLUDED_objects_impl_h_
#define INCLUDED_objects_impl_h_

#include "specifier.h"
#include "objects.h"

/*****************************************************************************
 *                        Color Specifier Object                             *
 *****************************************************************************/

struct color_specifier
{
  Lisp_Object face;		/* face this is attached to, or nil */
  Lisp_Object face_property;	/* property of that face */
};

#define COLOR_SPECIFIER_DATA(g) SPECIFIER_TYPE_DATA (g, color)
#define COLOR_SPECIFIER_FACE(g) (COLOR_SPECIFIER_DATA (g)->face)
#define COLOR_SPECIFIER_FACE_PROPERTY(g) \
  (COLOR_SPECIFIER_DATA (g)->face_property)

DECLARE_SPECIFIER_TYPE (color);
#define XCOLOR_SPECIFIER(x) XSPECIFIER_TYPE (x, color)
#define COLOR_SPECIFIERP(x) SPECIFIER_TYPEP (x, color)
#define CHECK_COLOR_SPECIFIER(x) CHECK_SPECIFIER_TYPE (x, color)
#define CONCHECK_COLOR_SPECIFIER(x) CONCHECK_SPECIFIER_TYPE (x, color)

/*****************************************************************************
 *                         Font Specifier Object                             *
 *****************************************************************************/

struct font_specifier
{
  Lisp_Object face;		/* face this is attached to, or nil */
  Lisp_Object face_property;	/* property of that face */
};

#define FONT_SPECIFIER_DATA(g) SPECIFIER_TYPE_DATA (g, font)
#define FONT_SPECIFIER_FACE(g) (FONT_SPECIFIER_DATA (g)->face)
#define FONT_SPECIFIER_FACE_PROPERTY(g) \
  (FONT_SPECIFIER_DATA (g)->face_property)

DECLARE_SPECIFIER_TYPE (font);
#define XFONT_SPECIFIER(x) XSPECIFIER_TYPE (x, font)
#define FONT_SPECIFIERP(x) SPECIFIER_TYPEP (x, font)
#define CHECK_FONT_SPECIFIER(x) CHECK_SPECIFIER_TYPE (x, font)
#define CONCHECK_FONT_SPECIFIER(x) CONCHECK_SPECIFIER_TYPE (x, font)

/*****************************************************************************
 *                       Face Boolean Specifier Object                       *
 *****************************************************************************/

struct face_boolean_specifier
{
  Lisp_Object face;		/* face this is attached to, or nil */
  Lisp_Object face_property;	/* property of that face */
};

#define FACE_BOOLEAN_SPECIFIER_DATA(g) SPECIFIER_TYPE_DATA (g, face_boolean)
#define FACE_BOOLEAN_SPECIFIER_FACE(g) (FACE_BOOLEAN_SPECIFIER_DATA (g)->face)
#define FACE_BOOLEAN_SPECIFIER_FACE_PROPERTY(g) \
  (FACE_BOOLEAN_SPECIFIER_DATA (g)->face_property)

DECLARE_SPECIFIER_TYPE (face_boolean);
extern Lisp_Object Qface_boolean;
#define XFACE_BOOLEAN_SPECIFIER(x) XSPECIFIER_TYPE (x, face_boolean)
#define FACE_BOOLEAN_SPECIFIERP(x) SPECIFIER_TYPEP (x, face_boolean)
#define CHECK_FACE_BOOLEAN_SPECIFIER(x) \
  CHECK_SPECIFIER_TYPE (x, face_boolean)
#define CONCHECK_FACE_BOOLEAN_SPECIFIER(x) \
  CONCHECK_SPECIFIER_TYPE (x, face_boolean)

/****************************************************************************
 *                           Color Instance Object                          *
 ****************************************************************************/

struct Lisp_Color_Instance
{
  struct LCRECORD_HEADER header;
  Lisp_Object name;
  Lisp_Object device;

  /* See comment in struct console about console variants. */
  enum console_variant color_instance_type;

  /* console-type-specific data */
  void *data;
};

#define COLOR_INSTANCE_NAME(c)   ((c)->name)
#define COLOR_INSTANCE_DEVICE(c) ((c)->device)

/****************************************************************************
 *                            Font Instance Object                          *
 ****************************************************************************/

struct Lisp_Font_Instance
{
  struct LCRECORD_HEADER header;
  Lisp_Object name; /* the instantiator used to create the font instance */
  Lisp_Object truename; /* used by the device-specific methods; we need to
			   call them to get the truename (#### in reality,
			   they all probably just store the truename here
			   if they know it, and nil otherwise; we should
			   check this and enforce it as a general policy
			   X and GTK do this, except that when they don't
			   know they return NAME and don't update TRUENAME.
			   MS Windows initializes TRUENAME when the font is
			   initialized.  TTY doesn't do truename.) */
  Lisp_Object device;
  Lisp_Object charset;  /* Mule charset, or whatever */

  /* See comment in struct console about console variants. */
  enum console_variant font_instance_type;

  unsigned short ascent;	/* extracted from `font', or made up */
  unsigned short descent;
  unsigned short width;
  unsigned short height;
  int proportional_p;

  /* console-type-specific data */
  void *data;
};

#define FONT_INSTANCE_NAME(f)	 ((f)->name)
#define FONT_INSTANCE_TRUENAME(f) ((f)->truename)
#define FONT_INSTANCE_CHARSET(f) ((f)->charset)
#define FONT_INSTANCE_DEVICE(f)	 ((f)->device)
#define FONT_INSTANCE_ASCENT(f)	 ((f)->ascent)
#define FONT_INSTANCE_DESCENT(f) ((f)->descent)
#define FONT_INSTANCE_WIDTH(f)	 ((f)->width)
#define FONT_INSTANCE_HEIGHT(f)	 ((f)->height)

#define XFONT_INSTANCE_NAME(f)	   FONT_INSTANCE_NAME (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_TRUENAME(f) FONT_INSTANCE_TRUENAME (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_CHARSET(f)  FONT_INSTANCE_CHARSET (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_DEVICE(f)   FONT_INSTANCE_DEVICE (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_ASCENT(f)   FONT_INSTANCE_ASCENT (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_DESCENT(f)  FONT_INSTANCE_DESCENT (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_WIDTH(f)	   FONT_INSTANCE_WIDTH (XFONT_INSTANCE (f))
#define XFONT_INSTANCE_HEIGHT(f)   FONT_INSTANCE_HEIGHT (XFONT_INSTANCE (f))

#endif /* INCLUDED_objects_impl_h_ */