view src/EmacsFrameP.h @ 5566:4654c01af32b

Improve the implementation, documentation of #'labels, #'flet. lisp/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * bytecomp.el: * bytecomp.el (for-effect): Move this earlier in the file, it's referenced in byte-compile-initial-macro-environment. * bytecomp.el (byte-compile-initial-macro-environment): In the byte-compile-macro-environment definition for #'labels, put off the compiling the lambda bodies until the point where the rest of the form is being compiled, allowing the lambda bodies to access appropriate values for byte-compile-bound-variables, and reducing excessive warning about free variables. Add a byte-compile-macro-environment definition for #'flet. This modifies byte-compile-function-environment appropriately, and warns about bindings of functions that have macro definitions in the current environment, about functions that have byte codes, and about functions that have byte-compile methods (which may not do what the user wants at runtime). * bytecomp.el (byte-compile-funcall): If FUNCTION is constant, call #'byte-compile-callargs-warn if that's appropriate, giving warnings about problems with calling functions bound with #'labels. * cl-macs.el: * cl-macs.el (flet): Mention the main difference from Common Lisp, that the bindings are dynamic, not lexical. Counsel the use of #'labels, not #'flet, for this and other reasons. Explain the limited single use case for #'flet. Cross-reference to bytecomp.el in a comment. * cl-macs.el (labels): Go into detail on which functions may be called from where. Explain how to access the function definition of a label within FORM. Add a comment cross-referencing to bytecomp.el. man/ChangeLog addition: 2011-09-07 Aidan Kehoe <kehoea@parhasard.net> * cl.texi (Function Bindings): Move #'labels first, describe it in more detail, explaining that it is to be preferred over #'flet, and explaining why. Explain that dynamic bindings with #'flet will also not work when functions are accessed through their bytecodes.
author Aidan Kehoe <kehoea@parhasard.net>
date Wed, 07 Sep 2011 16:26:45 +0100
parents 308d34e9f07d
children
line wrap: on
line source

/* Private header for the Emacs frame widget.
   Copyright (C) 1993-1995 Sun Microsystems, Inc.
   Copyright (C) 1995 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 3 of the License, 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.  If not, see <http://www.gnu.org/licenses/>. */

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

#ifndef INCLUDED_EmacsFrameP_h_
#define INCLUDED_EmacsFrameP_h_

#include "xintrinsicp.h"
#include <X11/CoreP.h>
#ifdef LWLIB_USES_MOTIF
#include "xmprimitivep.h"
#endif
#include "EmacsFrame.h"

typedef struct {

#ifdef LWLIB_USES_MOTIF
#if XmVERSION < 2
  /* It's easy to erroneously compile with Motif 1 headers, but link
     with Motif 2 libraries.

     For example, AIX stupidly provides Motif headers in
     /usr/dt/include, but fails to provide the corresponding libraries
     in /usr/dt/lib.

     We actually try to survive such a version mismatch, since Motif 2
     is _almost_ binary compatible with Motif 1.  Motif 2's
     XmPrimitivePart has some trailing data members which overlay the
     start of this struct.  We create dummy members to make space for
     XmPrimitivePart's added members.  These must, of course, be at
     the beginning of this struct.

     Delete this kludge when no one has Motif1 on their system anymore,
     perhaps in 2010. */
  XtCallbackList Motif2_dummy_convert_callback;
  XtCallbackList Motif2_dummy_popup_handler_callback;
  long           Motif2_dummy_layout_direction;
#endif
#endif

  struct frame*	frame;		/* the *emacs* frame object */

  /* Resources that can't be done from lisp.
   */
  char*		geometry;		/* geometry spec of this frame */
  Boolean	iconic;			/* whether this frame is iconic */

  /* The rest of this is crap and should be deleted.
     #### Comments that start with + are fields that actually get referred 
     to somewhere aside from the init function.
     I guess the "crap" has mostly moved to specifiers?
   */
  Boolean	minibuffer;	/* 0: normal frames with minibuffers.
				 * 1: frames without minibuffers
				 * 2: minibuffer only. */
  Boolean	unsplittable;	/* frame can only have one window */

  int		internal_border_width;	/* + internal borders */
  int		scrollbar_width;	/* width of frame vertical sb's */
  int		scrollbar_height;	/* height of frame horizontal sb's */
  int		top_toolbar_height;	/* height of top toolbar */
  int		bottom_toolbar_height;	/* height of bottom toolbar */
  int		left_toolbar_width;	/* width of left toolbar */
  int		right_toolbar_width;	/* width of right toolbar */
  int		top_toolbar_border_width;	/* border width */
  int		bottom_toolbar_border_width;	/* ... of bottom toolbar */
  int		left_toolbar_border_width;	/* ... of left toolbar */
  int		right_toolbar_border_width;	/* ... of right toolbar */
  Dimension	toolbar_shadow_thickness;	/* + of shadows */
  unsigned char scrollbar_placement;
  int		interline;		/* + skips between lines */

  XFontStruct*	font;			/* font */
  Pixel		foreground_pixel;	/* foreground */
  Pixel		background_pixel;	/* background */

  Pixel		cursor_color;		/* text cursor color */
  Boolean	bar_cursor;		/* 1 if bar, 0 if block */

  Boolean	visual_bell;		/* flash instead of beep */
  int		bell_volume;		/* how loud is beep */

  Boolean	menubar_p;		/* initially show a menubar? */
  Boolean	initially_unmapped;	/* + inhibit initial window mapping */
  Boolean	use_backing_store;	/* backing store for menubar & ew? */

  Dimension     preferred_width;        /* if non-zero, preferred size for */
  Dimension     preferred_height;	/* QueryGeometry() */
  /* private state */

} EmacsFramePart;

typedef struct _EmacsFrameRec {	/* full instance record */
    CorePart		core;
#ifdef LWLIB_USES_MOTIF
    XmPrimitivePart	primitive;
#endif
    EmacsFramePart	emacs_frame;
} EmacsFrameRec;

typedef struct {			/* new fields for EmacsFrame class */
    int dummy;
} EmacsFrameClassPart;

typedef struct _EmacsFrameClassRec {	/* full class record declaration */
    CoreClassPart		core_class;
#ifdef LWLIB_USES_MOTIF
    XmPrimitiveClassPart	primitive_class;
#endif
    EmacsFrameClassPart	emacs_frame_class;
} EmacsFrameClassRec;

extern EmacsFrameClassRec emacsFrameClassRec;	 /* class pointer */

#endif /* INCLUDED_EmacsFrameP_h_ */