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cleanups for specifier font stages, from ben-unicode-internal (preparation for eliminating shadowed warnings) -------------------- ChangeLog entries follow: -------------------- src/ChangeLog addition: 2010-02-08 Ben Wing <ben@xemacs.org> * faces.c: * faces.c (face_property_matching_instance): * faces.c (ensure_face_cachel_contains_charset): * faces.h (FACE_FONT): * lisp.h: * lisp.h (enum font_specifier_matchspec_stages): * objects-msw.c: * objects-msw.c (mswindows_font_spec_matches_charset): * objects-msw.c (mswindows_find_charset_font): * objects-tty.c: * objects-tty.c (tty_font_spec_matches_charset): * objects-tty.c (tty_find_charset_font): * objects-xlike-inc.c: * objects-xlike-inc.c (XFUN): * objects-xlike-inc.c (xft_find_charset_font): * objects.c: * objects.c (font_instantiate): * objects.c (FROB): * specifier.c: * specifier.c (charset_matches_specifier_tag_set_p): * specifier.c (call_charset_predicate): * specifier.c (define_specifier_tag): * specifier.c (Fdefine_specifier_tag): * specifier.c (setup_charset_initial_specifier_tags): * specifier.c (specifier_instance_from_inst_list): * specifier.c (FROB): * specifier.c (vars_of_specifier): * specifier.h: Rename the specifier-font-matching stages in preparation for eliminating shadowed warnings, some other related fixes from ben-unicode-internal. 1. Rename raw enums: initial -> STAGE_INITIAL final -> STAGE_FINAL impossible -> NUM_MATCHSPEC_STAGES 2. Move `enum font_specifier_matchspec_stages' from specifier.h to lisp.h. 3. Whitespace changes to match coding standards. 4. Eliminate unused second argument STAGE in charset predicates that don't use it -- the code that calls the charset predicates is now smart enough to supply the right number of arguments automatically. 5. Add some long(ish) comments and authorial notices, esp. in objects.c. 6. In specifier.c, change Vcharset_tag_lists from a vector over leading bytes to a hash table over charsets. This change is unnecessary currently but doesn't hurt and will be required when we merge in Unicode-internal. 7. In specifier.c, extract out the code that calls charset predicates into a function call_charset_predicate().
author Ben Wing <ben@xemacs.org>
date Mon, 08 Feb 2010 16:51:25 -0600
parents e34711681f30
children 308d34e9f07d
line wrap: on
line source

;;; 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)))))))

;;;;