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1 ;;; mule-x-init.el --- initialization code for X Windows under MULE -*- coding: iso-2022-7bit; -*-
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2 ;; Copyright (C) 1994 Free Software Foundation, Inc.
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3 ;; Copyright (C) 1996, 2002 Ben Wing <ben@xemacs.org>
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4
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5 ;; Author: various
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6 ;; Keywords: mule X11
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7
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8 ;; This file is part of XEmacs.
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9 ;;
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10 ;; XEmacs is free software; you can redistribute it and/or modify
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11 ;; it under the terms of the GNU General Public License as published by
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12 ;; the Free Software Foundation; either version 2, or (at your option)
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13 ;; any later version.
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14 ;;
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15 ;; XEmacs is distributed in the hope that it will be useful,
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16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ;; GNU General Public License for more details.
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19 ;;
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20 ;; You should have received a copy of the GNU General Public License
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21 ;; along with XEmacs; see the file COPYING. If not, write to the
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22 ;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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23 ;; Boston, MA 02111-1307, USA.
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24
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25 ;;; Commentary:
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26
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27 ;;; Code:
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28
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29 ;;; Work around what is arguably a Sun CDE bug.
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30
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31 (defun x-use-halfwidth-roman-font (fullwidth-charset roman-registry)
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32 "Maybe set charset registry of the 'ascii charset to ROMAN-REGISTRY.
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33
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34 Do this only if:
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35 - the current display is an X device
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36 - the displayed width of FULLWIDTH-CHARSET is twice the displayed
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37 width of the 'ascii charset, but only when using ROMAN-REGISTRY.
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38
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39 Traditionally, Asian characters have been displayed so that they
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40 occupy exactly twice the screen space of ASCII (`halfwidth')
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41 characters. On many systems, e.g. Sun CDE systems, this can only be
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42 achieved by using a national variant roman font to display ASCII."
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43 (flet ((charset-font-width (charset)
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44 (font-instance-width
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45 (face-font-instance 'default (selected-device) charset)))
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46
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47 (twice-as-wide (cs1 cs2)
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48 (let ((width1 (charset-font-width cs1))
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49 (width2 (charset-font-width cs2)))
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50 (and width1 width2 (eq (+ width1 width1) width2)))))
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51
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52 (when (eq 'x (device-type))
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53 (condition-case nil
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54 (unless (twice-as-wide 'ascii fullwidth-charset)
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55 (set-charset-registry 'ascii roman-registry)
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56 (unless (twice-as-wide 'ascii fullwidth-charset)
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57 ;; Restore if roman-registry didn't help
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58 (set-charset-registry 'ascii "iso8859-1")))
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59 (error (set-charset-registry 'ascii "iso8859-1"))))))
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60
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61 ;;;;
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62
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63 (defvar mule-x-win-initted nil)
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64
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65 (defun init-mule-x-win ()
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66 "Initialize X Windows for MULE at startup. Don't call this."
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67 )
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