xlike cleanup, documentation -------------------- ChangeLog entries follow: -------------------- man/ChangeLog addition: 2010-02-03 Ben Wing <ben@xemacs.org> * internals/internals.texi (Top): * internals/internals.texi (Evaluation; Stack Frames; Bindings): * internals/internals.texi (Ben's README): * internals/internals.texi (Consoles; Devices; Frames; Windows): * internals/internals.texi (Window Hierarchy): * internals/internals.texi (The Window Object): * internals/internals.texi (Modules for the Basic Displayable Lisp Objects): * internals/internals.texi (Window-System Support): * internals/internals.texi (Creating a Window-System Type): * internals/internals.texi (Discussion -- Garbage Collection): Update the part at the top about how to maintain the file with more tips. Add a chapter on "window-system support" describing in a general way how the support for different window systems/device types works, including the separation between device-independent and device-dependent parts, device methods, the specific device types and the "xlike" pseudo-type. src/ChangeLog addition: 2010-02-03 Ben Wing <ben@xemacs.org> * Makefile.in.in: * Makefile.in.in (x_objs): * Makefile.in.in (gtk_gui_objs): * console-xlike-inc.h: * depend: * device-x.c: * emacs.c: * gccache-gtk.h: * gccache-gtk.h (gc_cache_lookup): * gccache-x.c: * gccache-x.c (GCCACHE_HASH): * gccache-x.h: * toolbar-gtk.c: * toolbar-gtk.c (gtk_initialize_frame_toolbars): * toolbar-x.c: * toolbar-x.c (x_initialize_frame_toolbars): * toolbar-xlike.c: * toolbar-xlike.c (xlike_draw_blank_toolbar_button): * toolbar-xlike.c (xlike_output_toolbar_button): * toolbar-xlike.c (xlike_get_button_size): * toolbar-xlike.c (XLIKE_OUTPUT_BUTTONS_LOOP): * toolbar-xlike.c (xlike_output_toolbar): * toolbar-xlike.c (xlike_clear_toolbar): * toolbar-xlike.c (xlike_output_frame_toolbars): * toolbar-xlike.c (xlike_clear_frame_toolbars): * toolbar-xlike.c (xlike_redraw_exposed_toolbar): * toolbar-xlike.c (xlike_redraw_exposed_toolbars): * toolbar-xlike.c (xlike_redraw_frame_toolbars): * toolbar-xlike.h: * toolbar-xlike.h (xlike_clear_frame_toolbars): Rename some files to make them consistent with general naming rules: xgccache.c -> gccache-x.c xgccache.h -> gccache-x.h toolbar-common.c -> toolbar-xlike.c toolbar-common.h -> toolbar-xlike.h Fix include-file references. Also change the names of functions in now-named toolbar-xlike.c to be xlike_foo() instead of common_foo(). Add a longish comment in console-xlike-inc.h describing the "xlike" system, how it works and what the various files are used for.

;;; mule-x-init.el --- initialization code for X Windows under MULE -*- coding: iso-2022-7bit; -*-
;; Copyright (C) 1994 Free Software Foundation, Inc.
;; Copyright (C) 1996, 2002 Ben Wing <ben@xemacs.org>

;; Author: various
;; Keywords: mule X11

;; 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.

;;; Commentary:

;;; Code:

;;; Work around what is arguably a Sun CDE bug.

;; #### This is unused, apparently.
(defun x-use-halfwidth-roman-font (fullwidth-charset roman-registry)
  "Maybe set charset registry of the 'ascii charset to ROMAN-REGISTRY.

Do this only if:
 - the current display is an X device
 - the displayed width of FULLWIDTH-CHARSET is twice the displayed
   width of the 'ascii charset, but only when using ROMAN-REGISTRY.

Traditionally, Asian characters have been displayed so that they
occupy exactly twice the screen space of ASCII (`halfwidth')
characters.  On many systems, e.g. Sun CDE systems, this can only be
achieved by using a national variant roman font to display ASCII."
  (flet ((charset-font-width (charset)
	   (font-instance-width
	    (face-font-instance 'default (selected-device) charset)))
	 
	 (twice-as-wide (cs1 cs2)
	   (let ((width1 (charset-font-width cs1))
		 (width2 (charset-font-width cs2)))
	     (and width1 width2 (eq (+ width1 width1) width2)))))

    (when (eq 'x (device-type))
      (let ((original-registries (charset-registries 'ascii)))
        (condition-case nil
            (unless (twice-as-wide 'ascii fullwidth-charset)
              (set-charset-registries 'ascii (vector roman-registry))
              (unless (twice-as-wide 'ascii fullwidth-charset)
                ;; Restore if roman-registry didn't help
                (set-charset-registries 'ascii original-registries)))
          (error (set-charset-registries 'ascii original-registries)))))))

;;;;